Reviewing binary fission in bacteria
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You may upload your model through our model upload page. The web site will automatically create bacteria web page for your model. Contributed models are credited to their authors. We also have a model URL submission page. Use it if you prefer to host your model on an external web site The models These models are contributions from the user community and are not included with NetLogo. These models are authored by the individual contributor and are not checked by the CCL staff AntsAtWar by John Thomas Ants at War models two ant swarms at war illustrating the Invasive Ant Syndrome Airfoil Analysis by Lincoln Berkley This model simulates in two dimensions the motion of air around an airfoil shape, such as an airplane wing. It uses the motion of individual particles according to the Ideal Gas Law and elastic collisions, which are similar to the behavior of molecules in the real world. It can be used to analyze the effects of different airfoil shapes or environmental conditions, such as altitude or airspeed, on the forces on the airfoil and the turbulence patterns it creates. It also shows how the general principles of fluid dynamics come from the motion of individual particles Working Model for RESPECT by Virginia Mckay A public health model of intervention delivery to a population at risk for a disease. The intervention reduces risk for individuals who receive the intervention. Can modify the potential number of public health workers available to provide the intervention by modifying the number of available positions, the turnover rate, and the timing in training Fire in the forest by Roland, B. The bar is popular, but becomes overcrowded when too many patrons attend. Patrons are happy when less than a certain amount of patrons attend, say 60 for example, but they are unhappy when more than some other amount of patrons attend, say What will happen as time passes and people have pleasant or unpleasant experiences? Is it always true that the more a bar is popular, the higher its attendance? This model problematizes a seemingly simple situation of social interaction to fission that it is not that simple. Working in this model, we encounter and appreciate the inherent coordination challenges that can arise in complex dynamic systems involving agents with intention and specified needs and criteria of satisfaction. Can patrons of a bar somehow self organize to optimize overall satisfaction? Landscape Diversity by Ervin Wirth The Landscape Diversity model uses scout agents, whose task is the collection of different land cover types in a discovery time. After the simulation period we obtain an integral value, which can serve as a metrics to the landscape diversity phenomena. Higher potential values imply more complex landscape structure Genetic Inheritance by Emma This model is a simplistic simulation of the spread of a genetic disease with an autosomal recessive inheritance pattern in a small, isolated human population. Genetic diseases, indicators of heart, blood. The user controls several aspects of the child-bearing relationships modeled. This network is a small portion of the EGF pathway. After signalling molecules have linked up to receptors in the cellular membrane, the biochemical reactions of the MAPK pathway take place inside the cell. Based on the incentive, consumers decide to deliver ot not the waste to the post-consumer program PCP. At the same time, the PCP works thanks to the cooperation between related producer who assemble or import the device and distributor who sell devices. EONOERS by Klaus G. Artificial life model ALModel is an ecosystem simulation with autonomous agents individuals in a dynamic environment. Like any other artificial life model, it allows exploring real natural phenomena, emergence, and evolution within hours of runtime. It is edifying to study emergent processes through the observation of evolving intelligent agents. Natural selection reveals the main directions of evolution and specialization of various species after several generations of agents in the simulation. This model was also developed for testing of artificial intelligence AI of individuals. Currently, two AI models are included: a single large Fuzzy cognitive map FCM and an FCM combined with Analytic hierarchy process AHP gradient by Matthew Saponaro An abstract implementation of the local search algorithm Gradient Ascent with several variations. TBPatch by Pere-Joan Cardona and Clara Prats The objective of this Individual-Based Model is to analyse and understand the influence of four factors, namely the tolerability of the infected alveolar macrophage BLTOLthe anti-Th17 response, bacillary drainage and the encapsulation process, on the progression of lesions towards active tuberculosis TB. It has been published in: Cardona P-J and Prats C The Small Breathing Amplitude at the Upper Lobes Favors the Attraction of Polymorphonuclear Neutrophils to Mycobacterium tuberculosis Lesions and Helps to Understand the Evolution toward Active Disease in An Individual-Based Model. Microbiol doi fmicb banks by alessandro barazzetti The application simulates the market of Non Performing Loans and out of court behavior of the borrowers:Out of court behavior is useful because it shortens the collection times although decreases the amount of collectionAGENTS: borrower n - Bank 1 time axis: each step is one month1 each borrower is subject to a judicial auction of his real estate property which has a market value of OMV open market value. The court assigns a value to the property that is equal to the OMV CTU. The borrower proposes the extrajudicial solution taking into account: OMV, credit, JV, auction number3 For each borrower we have a different legal procedure duration timing of the court : In the model there is a parameter to define similar or very different timing between courts. Martin This model was designed to simulate the evolution of dispersal characteristics and species mobility in a landscape context, and the population response to habitat loss. Here mobility refers to the tendency to leave the current home range or territory i. This is because some landscape structures drive evolution of dispersal characteristics that increase both mobility and risk, while others drive evolution of characteristics that increase mobility and decrease risk. Chaigneau MIMICS purports to simulate a social group that uses two contrasting abstract concepts to communicate about a given situation. Furthermore, MIMICS assumes that abstract concepts require explicit teaching to be learned Musical Chairs REVISITED by Andreas Angourakis This Agent-Based model intends to explore the conditions for the emergence and change of land use patterns in Central Asian oases and similar contexts. Land use binary is conceptualized as the proportion between the area used for mobile livestock breeding herding and sedentary agriculture farmingthe main forms of livelihood from the Neolithic to the Industrial Revolution. Thomas Evolution of boundary-crossing behavior by Amanda E. Martin This simulation model was designed to simulate population dynamics and the evolution of the boundary-crossing response in a landscape context. The boundary-crossing response is the tendency to cross habitat boundaries, i. CompositeCollectiveDecisionMaking by Tomer J. Czaczkes This model models the collective foraging of an ant colony in an enviroment with multiple semi-permenant and replenishing food sources. This may, for example, aphid colonies, flowers, or extra-floral nectaries. The model is designed to explore how two types of information - social in the form of pheromone trails and private in the form of route memories affect colony level foraging physics-projectile-motion by Joseph Breisch This simulation places 2 tanks on the x-axis at a coordinate the user chooses or randomly. The tanks are then a specific distance away. Each player then has one shot they can take toward the other tank using initial velocity and an angle theta. It allows you to control traffic lights and global variables, such as the speed limit and the number of cars, and explore traffic dynamics. In our model, cars have a source and a destination, roads can have one or two directions, each of which can can have one or two lanes. At the beginning, the agent is not aware of which stimuli are to be avoided or followed. Learning occurs through Reward-and-punishment classical conditioning. They carry energy and it exists two species of ants that fight for their dominance in a simple way Utility Load Model by Ulisses Lacerda de Morais The Utility Load Model was designed to study the relationship amongst entrepreneurship and market structure of an economic sector. The model allows direct interaction between firms and people via New-Issues Market NIM and indirect interaction through an environmental parameter. The centrality of this study is beyond the center ofcity or as in this study, hypercenter of Strasbourg. As a result of transportation and other criteria, the center of city is meant to be more than one district in the old central parts of city and it is mostly dipersed in different parts of the city. The turtles are embodied in four classes of people. The upper the class is, fission more choice they have for their residents. As the proximity is in two categories distal and proximal there may be the possibility that someone choose the residence in periphery and benefit more from the spatious suburban residences. The purpose is to demonstrate how factors of home range size, movement characteristics, abundance, camera FOV dimensions, and camera triggering delay period contribute to the rate at which an animal encounters the camera airportdef by Javier Carbo Model of the airport including checking boxes, passport controls, boarding gates, etc. Defined to test the benefits of using Ambient Bacteria in such application domain Axelrod - Network by Daniel Diermeier This model simulates how people become similar through interaction. He goes on to cite three principles upon which his study is based on Agent-based modeling, 2 no central authority, and 3 adaptive as opposed to rational agents Confident Voter - Network by Daniel Diermeier This simulation models the Confident Voter model discussed in Volovik and Redner The Confident Voter model studies how individuals change opinion through interaction. Agents interact with their neighbors and adjust their opinion accordingly. Two adjustment procedures are studied: the Extremal Voter Model and the Marginal Voter Model Heterogeneous Voter - Network by Daniel Diermeier In Heterogeneous Voter ModelsMasuda, Gilbert and Redner introduce a heterogeneous voter model where agents have their own intrinsic rate to change opinion, reflecting the heterogeneity of real people. This model simulates their findings by studying how people adjust their opinion between multiple choices. The model simulates three different mechanisms for opinion adjustment: Ising, Voter, and Majority Ising - Network by Daniel Diermeier This model studies how social decision, known as magnetization, changes over time. Social decision is modeled as the average opinion of all agents. Agents have one of two opinions. They adjust their opinion over time based on their current opinion, the opinions of their related agents, and the global ease of opinion change. As agent opinion changes, so does social decision Potts - Network by Daniel Diermeier This model studies how social decision, known as magnetization, changes over time. The number of potential opinions varies. Agents adjust their opinion over time based on their current opinion, the opinions of their related agents, and the global ease of opinion change. As agent opinion changes, so does social decision Social Consensus - Network by Daniel Diermeier This model studies how public speaking or announcements affect social decision via an influential speaker. Social decision is measured by the opinions present in the network of agents. Speakers try to influence listeners to match their opinion. Shelton, Eriko Atagi, Justin R. Keene, Travis Ross This is a model of the internet game Boomshine created by Danny Miller. You, the player, have one opportunity, a boomshot, to click and create the longest chain reaction possible or a set number of explosions to achieve an estabilished goal. Jenkins Predator, Prey, Poison is modified from Wolf Sheep Predation in the Biology section of Sample Models of the NetLogo Models Library. I use coyotes and rabbits to illustrate predation because this is a natural predator-prey interaction that occurs wherever coyotes and rabbits coexist. The model includes the option of introducing a poison to some patches of habitat that kills both predators and prey during part of a simulation run. I discuss the model in detail in Chapter 6 of Tools for Critical Thinking in Biology, by Stephen H. Jenkins, to be published in April by Oxford University Press. NOERS by Klaus G. Troitzsch This model of an extortion racket system introduces norm and utility oriented decision making by extorters, their victims shop ownersthe police and consumers Flocking-softcontrol by Jing Han A special agent-shill, which is treated as a normal agent by normal ones, is added into the reviewing. User can intervene the flocking behavior through controlling the shill photosynthesis by Kit Martin A simple photosynthesis model NitrificationModelRutgersABedit by Annette Brickley Nitrification in an aquarium: Cindy Hmelo-Silver of Rutgers Univ. The model is based off of both theoretical formal modeling work completed by Celentani, Massino and Martinaand real world empirical findings from studies carried out by Professor Jonson Porteux in East Asia. The model is an attempt at expanding upon existing models by specifically illustrating the adaption of actors to varying institutional environments and levels of capacity, as well as adding to the generalizable reach and robustness of research based findings by Professor Jonson Porteux. The reasons for cooperation between state actors and criminals might be unclear. Such outcomes is a result of legitimate state institutions being incapable of reducing such risks due to poor definition of property rights, the inefficiency of the state courts of justice in resolving disputed, and their incapacity to enforce decisions. The actors attempts to obtain optimum utility based added value which is based on the scores and weights of risks, investments and technology levels. The scores are obtained from field data. The model is created to find the weights of the 3 influencing factors. The utility function is broken-down into permutation of the 3 factors, and to get the optimum value the factors are iterated Spiranimator by David Slauson Spiranimator creates animated and somewhat hypnotic spiral patterns by making incremental changes while repeatedly drawing line segments. After each spiral pattern is drawn the model waits briefly and then draws the pattern again, but from a slightly different starting angle. The result is an animated spiral pattern. It simulates the traffic flow and interactions between cars and pedestrians. The interest rate theory is telling us that the interest rate differential between two countries is equal to the differential between the forward exchange rate and the spot exchange rate. Interest rate parity plays an essential role in foreign exchange markets, connecting interest rates, spot exchange rates and foreign exchange rates. The former case is much more challenging, but a right setting of parameters will get that to work too! This theory was first applied to evolutionary processes by John Maynard Smith. Game theory is based on sub-groups of interacting agents, drawn from a meta-population, with certain payoffs occurring between the agents. These payoffs depend on the behavioral strategies of each of the interacting agents. The primary variables of interest are 1. Agents can generate certainty by conforming to the expectations of others. In this model, there are n groups, each with 2 attitudes: an "in-group" attitude towards its members, and an "out-group" attitude towards everybody else. Basically, the potential patch location calculates this for every other turtle and then sums them to get the overall or total value for that patch. Then, the turtle picks the patch with the highest value and moves to it. First, you can choose more than two groups now. Display basic SIR model of a baboon system where rainfall promotes disease spread. ARDERS by Klaus G. Troitzsch The famous arders model Technology diffusion ABM by Peter Bodo This model simulates technology diffusion. The model outputs the overall technology diffusion curve and diffusion curves for the competing brands and products. The character knight can perform several interactions which are hierarchized so as to make it search and reach its goals. Basically the main goal of the knight is to rescue the princess which is somewhere in the maze. The knight uses a stack of goals so as to execute the appropriate actions. The knight is also endowed with personality traits which influences the interactions that are chosen in a given situation and thus introduces diversity in the outcome of the simulation. This implementation relies upon the IODA extension for NetLogo which allows the definition of declarative interaction rules for the design of behaviors adverselockinmodel2 by Rishabh Kumar A Model of Innovation and Diffusion, where firms innovate using a genetic algorithm to solve a technological bottleneck. Generally speaking, the purpose of the model is to see under what conditions "cooperation" or "altruism" will prevail given self-interested agents. It involves the concepts of multi-level group selection and inclusive fitness BRADFORD SOCIAL NORMS Emperors Dilemma by John Hamilton Bradford This model tests under what conditions people will not only comply with norms they privately disbelieve i. The heuristic function used h n always gives the exact distance from an intermediate patch to the destination patch by employing the NetLogo primitive "distance". This takes place by choosing the next patches nodes for exploration which are not yet explored and have the least cost i. This enables the algorithm to always find an optimal path least cost path to the destination, if one exists Pandoran Ecosystems by Kaan If you have ever seen AVATAR and the various creatures, this model simulates the ecosystem. Creatures all come in multiple colours so you can pick out more successful El Farol Attack of the coin flippers by Rolf Stenholm This is an extension to the El Farol bar problem. El Farol was originally put forth by Brian Arthur as an example of how one might model economic systems of boundedly rational agents who use inductive reasoning MARS Migration by Jakob Virgil a mars exo-migration model VirtualCryptModel G by Rafael Bravo and David E. Axelrod This computational model simulates the stochastic cell dynamics of normal human colon crypts. The model was calibrated with measurements of the numbers of stem cells, proliferating cells, and differentiated cells in human biopsy specimens. It has been used to simulate the initiation and treatment of colon cancer. It can be used for in silico experiments by changing model parameter values at the user interface. A more complete description of the model and simulation results are available in the publication R. This adaptation only makes people influencable if they seek opinions from others. People only seek opinions from others if they perceive that their knowledge level is lower than the average knowledge level of their alters. Democrats can take on a random value between 0 and 1. Notice how the addition of lobbyists to the model makes political agents settle into their final positions much earlier, reviewing gridlock. It models the opinion diffusion process in congressional committee environments. People seek opinions from others if they perceive that their knowledge level is lower than the average knowledge level of their alters. It is based on the board game SIMULATING NATURAL SELECTION by Robert P. Gendron from Indiana University of Pennsylvania. The model incorporates the following elements of a natural system: Variability, heritability, competition, predation, carrying capacity and differential reproduction. Users can set the intial values for adaptation scores, variability of adaptation scores and population size. This model is made to illustrate this effect of vulnerability. This means that this model predicts that a person that is vulnerable and develops a depression due to, for example, severe marital problems, will not recover automatically when the marital problems are solved. More is needed to trigger recovery from depression. Conversely, for someone that is resilient to depression i. Severe stress can lead to a full-blown depression, but when the stress subsides, the depression will subside too. This effect is also known as the hysteresis effect Information Cascades by Rob Carrington This models studies the conditions under which information cascades can occur with signalling games between simple reinforcement learners. The colonies maintain a balance between number of soldiers, and number of guards. The target of both armies is to eliminate the enemy queen while protecting their own. The smallest turtles, the soldiers, meet and fight each other. A "battle" consists of the program using a random number generation to act as a coin flip. If one soldier wins the coin flip, the other dies. Guards have a protection program that keeps them surrounding the queen unless they "smell" and enemy soldier, in which case they follow the scent and kill the soldier. Once a guard kills five soldiers, it runs out of strength, and dies. The queen reproduces lost soldiers and guards when they die, and acts as a flag, when their queen dies, they can no longer re-produce, and are much more likely to lose Location Game by Jeff Russell This is a simple model of competing restaurants choosing where to locate in a strip shopping mall. The purpose of this game is to gain experiential familiarity with the strengths and weaknesses of the principle of minimum differentiation as a model that explains the observed clustering of retail sellers at a central location Schlieffen Logistics by Robert Allen, Brian Coffey, Dante Montgomery, Ashley Rawson, and Brian Stebar II This model simulates logistical elements of the opening weeks of the World War I. Specifically, it contains a model of the rail system used by the Germans to supply their forces as they advanced through Belgium and into France from August 5 to September 7, Since the German advance unfolded differently from their original plan The Schlieffen Planthe goal of this model was to analyze whether the original plan was viable from a logistical point of view. To accomplish this goal, the model presents two simulation modes: one showing the original Schlieffen plan, and the other showing the way it actually unfolded in history. Thom McLean College of Computing and Dr. Michael Salomone School of International Affairs GraphingRationalFunctionsGame by Edwin Schasteen The following will be a game for teaching students how to graph a rational function. The current model is a test model to see if the model can be run from a website. It was inspired by a similar model meant to be done by hand on paper see "Forest Fires, Oil Spills, and Fractal Geometry", Mathematics Teacher, Novp The soil is modeled as a checkerboard of hard particles gray squares and semi-permeable spaces in between these hard particles brown squares. You may need to zoom in to see the individual squares. Oil cannot enter the solid gray squares, but it may pass through the brown squares. Some soils are more porous "holey" than other soils. In this model the porosity value of the soil determines the probability that the oil will be able to enter any given brown soil square. This view is called the causal network perspective. One of the daily newspaper that Freddie sells from his newsstand is the "Financial XYZ". Any copies unsold at the end of the day are returned to the distributor the next morning. However, to encourage ordering a large number of copies, the distributor does give a small refund for unsold copies. Partially because of the refund, Freddie has always taken a plentiful supply. However, he has become concerned about paying so much for copies that then have to be returned unsold, particularly since this has been occurring nearly every day. To investigate this further, he has compiled the following record of his daily demand: Freddie sells anywhere between 40 and 70 copies on any given day. The frequency is distributed uniform roughly equal each number in between The decision Freddie needs to make is the number of copies to order per day from his distributor. His objective is to maximize his average daily profit. Dados2 by Francisco Restivo Simulates the rolling of a dice. There is one agent for each possible result between 1 and The Nth agent jumps forward each time you need N throws to obtain the six results. The objective is to estimate how many throws you need to obtain the six different faces. The scale allows to adjust manually the draw to the available space. There is no control of impossible results. Inconsistent diferentitation measures may introduce errors CoordinationAndSustainability by Klaus G. Agents harvest and either eat or add the harvested food to their "wealth". Agents have a limited lifetime, and they can die from starving. All of these actions satisfy their needs of survival, wealth, reproduction and information. Moreover they have a need of being influential which is an incentive to co-ordinate other agents. Co-ordination means that co-ordinating agents collect information from their volunteer subordinates and forward this information back to all their current subordinates which gives both co-ordinators and subordinates a wider range of vision such that their chance to move to more promising patches increases. The decision to co-ordinate, subordinate, end co-ordinating or end subordinating and all other decisions to eat, to harvest, to move, to reproduce depend on the expected utility of the respective action which in turn is calculated as a weighted sum of degrees of satisfaction of the needs mentioned above. The decision is probabilistic, such that the action with the least utility is never taken whereas the other actions are taken with a probability proportional to the expected utility Wealth Distribution2 by Abel Porras This is a extension of the Wealth and Distribution model developed by Uri Wilensky. I have added a slightly progressive tax rate structure to distribute the wealth to other classes. The load increase step and the maximum capacity of the bins can be modified. Bin content increases randomly in a range defined by the load increase step on a hourly basis. It is a preliminary version of the MEGanE studied as a dynamic model Siste Mafia33, edited 2 by Adrian Ordemann and Benedito Faustinoni Neto This work simulates a market influenced by Mafia. The white agents are the storeowners; the black are the mafious and the blue represents the police ones. The patch is a simplification of the market, where the storeowners can obtain profits or not. When a mafious finds a storeowner, he tries to get money from this. Individual agents imitate members in an online community and can make decisions to read and post messages based on perceived benefits and costs of doing so. It can be used to run virtual experiments to develop theories about individual behaviors and social dynamics in online communities and to inform the design of real-life online communities. In this frame the model introduces social persons and opportunistic free riders into the world which are all focusing one common good of limited number and limited operation level, the bicycles. The agents of different breeds social persons and freeriders are setup in an environment gridwhich contains ground, introduced by patches with the attributive operation-level of -1 and grey color, operating bicycles, set as patches with operation-level of 20 and green color and broken bicycles with operation level underneath 5 and of brown color. The breeds are distinguished through the different value of the state variable attributes, which is willingness-to-repair, their attitude. According to their attitude, the breed react differently on the state of the patch there are on and also the state of the patch operation level changes due to interaction with agents Educational Model of Speciation by Carter Merenstein This is a set of simulations designed to show how two populations become different species, through a process called speciation. There are two types of speciation: allopatric, which relies of geographical isolation, and sympatric, which relies on behavioral isolation. This simulation is designed with introductory biology students in mind, though no prior knowledge is required to explore WSN-Project-20-Final-6 by Rafi Mahabbat Bin Belal The model was designed to investigate the energy efficiency of multihop routing protocol for decentralized wireless sensor networks. The main question was how was the energy efficiency being achieved in networks employing multihop routing? What parameters gave the optimal energy savings compared to direct transmission? How is the network lifetime effected by changes of these parameters in the same network? The model has one two entities. Wireless sensor nodes and Data packets. The nodes are spread randomly in a 150x150 landscape. Data packets have only one variable. Their size which is constant. Describe the experience of customers in terms of total time in the system. Troitzsch This model is a simple agent-based model of negotiations between potential employers and potential employees in an artificial economy in which minimum wages are expected to be introduced. In the current version both groups can have different sizes, and every employer can employ more than one worker. The current version makes a distinction between three employer types fast food providers, providers of cleaning services and providers of simple construction services. The model is in some features inspired by the zero-intelligence constrained ZI-C traders from Gode and Sunder. The ZI-C traders cannot make bacteria trade that will yield a negative profit, i. The minnows also feed on plankton, which is continuously regenerated. The difference binary this and other predator prey models is that there are options to a have the fishing boats hunt minnows b have the minnows try to escape from the boats and c let the minnows school. Plus there is the option of modifying the behaviour of the fishing boats by adding in no-fish reserves. There is quantitatively different population dynamics when each of these options is selected. This model therefore serves to show the versatility of agent based modeling in complex population dynamics OptionsMarket by William Elliott This simulated options market creates a grid of traders who use the Black-Scholes formula to determine when to buy and sell options. Values such as the starting price and the risk free rate of interest can be adjusted by the user to see what effects different variables have on the market. The agents are arranged on the grid based on their level of "patience" the range of the market they analyze and "judgement" how much they deviate from the Black-Scholes formula. The traders gain and lose money as they trade options with the Black-Scholes formula. Lighter green means success, lighter red means loss, and darker colors or black indicates small success or small loss. The implementation of conservation actions to manage fishing pressure and water quality has already shown resilience benefits, however ongoing public support is critical to ensure these and future actions can successfully counter the deleterious effects of climate change. Public understanding of resilience theory and the complexity of stochastic events effecting coral reefs is limited, in part, by the model format presented. Smog by Madison Fitzpatrick This model simulates the formation of photochemical smog over time. Nitrogen dioxide NO2 and volatile organic compounds VOC are primary pollutants that are released into the atmosphere as a result of fossil fuel combustion. Herders may practice wet season dispersal, where they graze broadly during the wet season and are confined areas near water in the dry season, or dry season dispersal, where they stay near permanent water in the wet season but then move further into reserved grazing lands in the dry season. The benefits of those two methods may be compared. The model was used in a chapter publication, Boone and Galvin in press, anticipated in of a volume edited by Manfredo et al Peloton Simulation 3 by Hugh Trenchard Cyclists well know that as they increase their power-output toward their maximums, it becomes harder to pass those ahead of them. There are no Lance Armstrongs here. It is an agent-model designed to investigate the dissemination of culture among interacting agents on a society. Each agent can interact only with its four neighbors von Neumann neighborhood. Dynamics are based on two main mechanisms agents tend to chose culturally similar neighbors as interaction partners homophily and during interaction agents influence each other in a way that they become more similar. The interplay of these mechanisms either leads to cultural homogeneity all agents are perfectly similar or the development of culturally distinct regions multicultural society VisualizationCommunities by Vivienne Kennedy This is a demonstration of the utility of network visualization and in particular spring layout algorithms DroneNET by The Soviet Unit This is a model of a decentralized goods delivery network managed through drones, designed to test some basic elements of its configuration and identify its topline functioning profile. The objective of the game is to have player-controlled buckets at the bottom of the screen catch bombs that are dropped by a turtle at the top of the screen. The turtle, known as the Bomber, exhibits random horizontal motion and periodically drops bombs. So, when cycling at low power-outputs, riders can pass others frequently at comparatively fast speeds. As this power-output level increases, riders pass others less frequently, they reduce their lateral movement, and the peloton begins to lengthen. At a certain power-output threshold, they cannot pass others at all, but by drafting they can keep up to those ahead, even if riders ahead are stronger. This model simulates phases that emerge from these principles Combustion of Methane by Stephen Fether This model is designed to simulate the combustion of methane gas. Solar magnetic field motions are complex and poorly understood. Space weather can affect satellites and power grids at times if a large bacteria event occurs. The model displays other observed solar patterns, and the model is written as 1p07 meaning twitter by B. Players have preferences over one of the available options and best respond given the choices of their neighbors. Al-Adrousy Based on lattice walking turtles, this is a simplified model for mobile ad-hoc network MANET, with moving nodes mobiles. Each node can have variable range of connection. Each car follows a simple set of rules Adhere to the speed limit; 2 If car ahead is stopped, stop; 3 If road ahead is closed, find available route; 4 If light is red, stop If light is green, go. OSOSS stand for online self-organizing social system. Criminals are divided into light and heavy criminals according to crime factor. Light criminals forms gang and do gang robbery. When they achieve crime factor greater than 5, they do heavy robbery. Light robbery gains half the wealth of victims. Victims are - people, women and kids. Women and kids are easy to rob. Zombies are intended to remain a constant challenge to the human population, the environment randomized according to a set of fairly tightly constrained criteria. Survivability is judged for this model on the number of ticks human agents are able to persist in each round. It shows three phases as a function of a changing speed ratio between riders "in the wind" and those behind in drafting positions. It ignores race strategy or team tactics, and supports the notion that peloton dynamics are largely self-organized and not driven by individual and team strategy, which are secondary factors Girls Get Attached by YANG SHANSHAN With this model I have tried to establish a real-life simulation of how girls and boys get attached. This model is very fundamental and is inspired by real life experience around me that girls tend to attach with people who are closer to them even though with a lower attractiveness. While social influence is a model to understand how individuals could influence each other through dynamic interactions. Instead of solely looking at segregation or social influence seperately, this model is built to examine the pattern of social change by assuming the social segregation and influence occur at the same time. In addition, the model aims to see how the strength of intimacy between the smoker and his surrounding people can affect his smoking behavior The Influence of Obesity in a Social Network by Elaine Kho This model looks at the spread of obesity weight in a social network, specifically amongst family and close friends. Many studies have supported this finding, binary obesity to circle of friends. It works on the the theory of homophily, where individuals often have the tendency to associate and adapt to similar others advanced enzyme kinetics by Georg F. Weber This model demonstrates the kinetics of single-substrate enzyme-catalysis. In Michaelis-Menten kinetics, there is typically a fixed initial substrate concentration. This is a limited model of biology. Enzymes in situ often work under rhythmic substrate input. As a add-on feature, current simulation will also be observing the effect of different valance of the information e. Moreover, according to the result collected by Deitz and Cakimthe number of negative w-o-m overpower positive w-o-m by times. The add-on feature in this simulation is based on a journal article titled "On Braggarts and Gossips: A Self-Enhancement Account of Word-of-Mouth Generation and Transmission" by Angelis, M. This model is basically trying to mimic the spread of information through word-of-mouth. How a simple advertisement seen by only a few people can be effectively spread among the community members Yawn Contagion by Nilah This model demonstrates a world where people live to yawn all their lives PD N-Person with Strategies by Tan Yongzhi This model aims to study the effects of cooperating and competing within a society; competitors gain more individually, while cooperators help the society to gain more collectively. Helmich The model displays differences in smoking behaviour as determined by peer pressure and motivational-orientation: whether an agent seeks approval from peers extrinsically motivated or from within himself intrinsically motivated influences their perception of and reaction to peer pressure Fashion-Models by Lau Wee Kiat This is a simulation for a class project on agent-based modelling, in Nanyang Technological University Singapore. You can apply two solutions, made a "bail in" changing debt for stock shares or let the bank to crash and disappear. Is modificable the "bank panic" and the recovery chance of one bank or company in crises to return to normal status. An evil bunny basically terrorizes students - not exactly what I intended, but it was fun. This model is my first attempt at coding NetLogo, which it should be apparent that I liberally borrowed lines from every code I came across, including wolf-predation and zombie models, as well as the example codes and the manual. It is a model of a cocktail party, where men and women at the party form groups. The party-goers have a TOLERANCE that defines their comfort level with a group that has members of the opposite sex. If they are in a group that has a higher percentage of people of the opposite sex than their TOLERANCE allows, then they are considered "uncomfortable", and they leave that group to find another group. Movement continues until everyone at the party is "comfortable" with their group Frogger Simple Reflect Agent by Mochamad Agung Tarecha This is application of Simple Reflect Agent. This is my homework for the 5 th semester in Jurusan Teknik Informatika UIN Maulana Malik Ibrahim Malang Indonesia. I know this is far from perfect. FYI : My other friend also have a same task, but with different algorithm, different game, different way. I hope they also share their idea. GBLCSA by To use this model in its full form, please follow this link This model implements a genetic-based classifier system to forecast stock returns. As such, it is not exactly a simulation model. Instead, it is an input-driven algorithm given that it requires a file with data on prices and other fundamental indicators in order to work. This version does not have sound left-right-game by Ralph Turner This is a simple game aimed at helping children learn their left and right. This version has sound. Citizens buy land with probability that is directly proportional to their wealth - the rich are more probable to buy land than the poor. Can the Jubilee still help the poor get some land? Serdar Tasan, Kemal Subulan Although many meta-heuristic algorithms were developed for solving combinatorial optimization problems, very few of them were realized in an agent based environment. The algorithms which model dynamics of Artificial Immune Systems AIS are population based approaches with adaptability characteristics, therefore AIS can be better realized in an agent based modeling environment. For this purpose first time in the literature a clonal selection algorithm which is an AIS based algorithm is modeled in a multi agent environment for solving the travelling salesmen problem which is a NP-hard combinatorial optimization problem. In order to observe the behavior of the algorithm simulation experiments are carried out on several test problems in NetLogo. Moreover, receptor change process and crossover mechanisms are integrated into the proposed model in order to improve the performance of the classical clonal selection algorithm. It is shown that there is a high potential to obtain good solution by making use of agent oriented approaches which can more realistically model the natural phenomenon TraitScape by Heather Bird Jackson This program allows an investigator to test hypotheses concerning the effect of three species traits dispersal distance, reproductive rate, and movement behavior on abundance within a focal area. The output includes information about habitat cover in 10 concentric rings and abundance of individuals in the focal area. This model demonstrates the way in which altruism in an isolated population can result in that population growing sufficiently fast in comparison to selfish populations that altruism predominates once the populations mix. Also includes preferential mixing assortativity which increases the effect by allowing altruists to mix primarily with other altruists Agent-Based Model by Pradeep Kumar Health care improvement efforts often focus on changing the behavior of individuals while the interdependencies among individuals are overlooked. The application of complex adaptive systems approach to studying healthcare delivery changes the focus of improvement efforts from the individual to the relationships and interdependencies among individuals in the system. Sensemaking and improvising are social activities that take place in the context of relationships between individuals. We explore the impact of sensemaking and improvising on patient outcomes in healthcare settings Gravity Final - Ivaylo M by Ivaylo Madzharov This is a planetary gravity simulator, or an orbital simulator. It simulates the orbitsof stellar bodies around each other depending on factors such as mass, speed, and distance. Dixon This is a friendship game model. A friendship game is a kind of network game: a game theory model on a network. A game starts with a model of a network of turtles. Each turtle considers as its friends every other turtle that is linked directly on the network. Each turtle decides what strategy to play, x or y, based on the choices made by its friends. The topic of this model is "Robots Cluster Model with Infrared by Clustering Algorithm" represented Infrared by color of turtle merchant by Adam Marchetti This is an economic model of banks, merchants, and shoppers, and how they interact and evolve, given only a few starting parameters Classic Traveling Salesman by Wes Hileman This model solves the traveling salesman problem a classic NP-hard problem by means of a genetic algorithm. The model also incorporates the ERX crossover; a method of crossover specially developed for problems like the TSP. However, the code behind the algorithm is rather lengthy Feldman NetLogo Interface Algorithmic Finance by Todd Feldman This is the basic version of a NetLogo model for financial markets PERSECUTIONS by Luis Belmonte A game of persecutions obsessives Segundo jogo do conhecimento 2 by claudio augusto borges pavani This is the game of knowledge, that demonstrates knowledge of the culture of a company, in which six players interact. Sketchily, Arctic BE can be characterized by the time-varying total amount BrO and its lifetime. We construct a flow distribution network with a predefined output pattern of the total amount BrO the satellite BrO samples. We assume that the predefined output pattern is a distribution made up of the countable number of the mass points. Even the minimal solution becomes far from trivial because of the uncertainties in aerosol loads and the lack of data concerning decline phase of Arctic BE agentworld by suslik Agents in a world with various interaction rules. Different rules produce different behaviour. This model is very similar to Heatbugs and Slime which can be found in netlogo models library WealthDistribRes by Romulus-Catalin Damaceanu This model WealthDistribRes can be used to study the distribution of wealth in function of using a combination of resources classified in two renewable and nonrenewable. This agent-based computational model created in NetLogo has the following fundamental characteristics: i the turtles are of two types: female and male; ii these turtles have a limited life expectancy determined by the parameters LifeExpectancyMax maximum life expectancy and LifeExpectancyMin minimum life expectancy ; iii patches stores a certain amount of water ResWater? Heat diffuses and evaporates in the world. New particles are created at the bottom of the world with random positions and output-heats. Particles move to the best closest patch from the 3 closest next patches in the next row. Best patch is the patch with least absolute value of the particles ideal temperature - heat. Being a two player game, there are two players, a red player and a blue player. Romero-Campero This model explores the evolution of aggresion in a system consisting of animals fighting for a resource necessary for reproduction. Three different strategies are considered: doves, hawks and retaliators. Doves are not aggresive, they start displaying and retreat at once if their opponent is aggresive. When both opponents display one of them eventually gives up the reward to the other one but both pay a cost for wasting time. Hawks are aggresive and fight with opponents that do not retreat until one of them is seriously injured and the other one gets the reward. Retaliators start displaying but become aggresive when their opponents are aggresive. No "centralized cause" is needed for a traffic jam to form. The model embraces the three main ecosystem components the landscape environment, the producers, and the decomposers. It has been proposed that the ecology of competition influences the degree of emphasis of firms on exploration and exploitation activities for producing new products - the greater the competition, the greater the need to exphasize exploration of new technologies Brenner and Tushman ; Ghemawat and Costa This model looks at the product development strategy made by innovative firms as they create new products for the marketplace. The makeup of the consumers early adopters of new technologies vs. The red turtles and green turtles get along with one another. But each turtle wants to make sure that it lives near some of "its own. It has been devised as a basic visual model, giving an overview of the scenario where pathogen and hosts interact. Babesim by Angel Criado This model is a simple illustration of the life-cycle of the parasitic protozoa "Babesia microti", and how several strategies may help to control the disease babesiosis. It has been devised as a basic visual model, giving an overview of the fission where pathogen and hosts interact Brugiasim by Angel Criado This model is a simple illustration of the life-cycle of a filarial parasitic nematode called Brugia malayiand how several strategies may help to control the disease. It has been devised as a basic visual model, giving an overview of the scenario where pathogen and hosts interact Cryptosporisim by Angel Criado This model is a simple illustration of the life-cycle of the parasitic protozoa "Cryptosporidium parvum", and how several strategies may help to control the disease Cryptosporidiosis. It has been devised as a basic visual model, giving an overview of the scenario where pathogen and hosts interact Leishmanisim by Angel Criado This model is a simple illustration of the life-cycle of the flagellate protozoa "Leishmania infantum" in Southern Europe, and how several strategies may help to control the disease called "leishmanisosis". Richersonand put forward as a "paradigmatic example in memetics" by Derek Gatherer in the Journal of Memetics Rather than using an abstract recursive procedure involving the population proportions, however, this model uses individual interacting agents in a space. The spatial dynamics may be of interest: in particular, the formation of population source clusters under some conditions was a little surprising to me Artillery by Eric Muhs This model is based on the classic game Tank Wars. Players must adjust angle and power of fire to hit a target with a projectile. Several factors, including gravity and wind binary be taken into account David Miller - Resteraunt Model by David Miller This is a geospatial model of the dynamics within a sushi restaurant built in order to demonstrate several key notions related to complexity theory. It additionally analyses the multiple relationships between the different systems involved allowing the observer to find an optimal system for serving customers while keeping angry customer to a minimum. He takes a riot as an example of the phenomenon. Bandwagon is usually described as the tendency to adopt a technique, innovation, behavior, thought, process, or attitude because of its popularity or, that is the same, because that is what the sheer number of peers are doing. According to Granovetter, bandwagon emerges through the idea of a "threshold" level. These "deviated" models are meant to be better approximations of what happens to real bandwagon phenomena. For more information see:- Sueur, C. L Short-term group fission processes in macaques: a social networking approach. Journal of Experimental Biology, 213, doi jeb independence vs. For a description of the model see: Sueur, C. D Differences in nutrient requirements imply a non-linear emergence of leaders in animal groups. Row 1 corresponds to the identity of agents. Row 2 represents the body mass. Row 3 is the daily protein requirement. Row 4 is the daily energy requirement. Row 5 is the protein intake rate. Row 6 is the energy intake rate. Row 7 is the daily water requirement. Row 8 is the daily social time requirement. Row 9 is the daily resting time requirement. Row 10 is the category of individuals male, female, etc. This variable is not used and analyzed in this study. In this project, a colony of ants forages for food. On this study, we suggest the use of robot traders as an anti-bubble decoy. To make our case, we put forward a new stochastic cellular automata model that generates an emergent stock price dynamics as a result of the interaction between traders. Initially, there are only agent traders representing humans, and subsequently, robot traders enter the market. The traders are represented by cells on a two-dimensional L x L grid. There are N traders who can either buy or sell only one share, and these are two mutually exclusive states. Here, traders consider the information related to the behavior of their neighbors Moore neighborhood and also that related to the fundamentals. It is written in NetLogo HabitatFragmentation by George Kampis and Istvan Karsai This model explores the stability of predator-prey ecosystems with fragmented habitats diffusion by Gabriel Rossman This program first creates a social network and then simulates the diffusion of an innovation through the network following a combination of the Bass model and a network contagion model. Agents turn red as they adopt the innovation. New adopters are shown as hollow bacteria circles and incumbent adopters as solid red circles. In a Bass model unlike an S-I-R model adoption is permanent. Small green numbers show the number of neighbors having adopted TowerofHanoi by Shayryl Mae Ramos The Tower of Hanoi or Towers of Hanoi is a mathematical game or puzzle. It consists of three poles, and a number of disks of different sizes which can slide onto any poles. The puzzle starts with the disks in a stack in ascending order of size on pole A, the smallest at the top, thus making a conical shape. The objective of the puzzle is to move the entire stack to another pole according to the following rules Only one disk may be moved at a time Each move consists of taking the upper disk from one of the poles and sliding it onto another pole, on top of the other disks that may already be present on that pole. Once created, the rabbits move away from the foxes if they are too near Foxes and Rabbits by William John Teahan This NetLogo model creates foxes and rabbits Communication T-T Example 2 by William John Teahan This model simulates the spreading of a message between agents. It also demonstrates some important concepts such as the small world phenomenon, degrees of separation, and super-nodes in peer to peer networks ANZ Continental Drift by William John Teahan This model shifts New Zealand back towards Australia in order to illustrate the process of continental drift. In effect, the model is running time backwards in order to show where New Zealand was in relation to Australia millions of years ago Agent Animation by William John Teahan This NetLogo model performs a simple animation of various turtle agent shapes to give the impression that they are flowing past the observer Wall Following Events by William John Teahan This model visualises a small set of events that an agent can follow in order to perform a modified type of wall following behaviour where sensing, thinking and acting are all done concurrently in no particular order see the Wall Following Example 2 model for further exaplanation Wall Following Example 2 by William John Teahan This model shows how to provide turtles with an ability to follow walls. Elimination - kill all the enemies on your screen. Using the System Dynamics Modeler, this model captures the essential design and behaviour of a Viessmann gas furnance being used in the Bas-Rhin of Alsace in France during winter. All temperatures are in centigrade and initial values and ranges have been choosen for a typical winter season in this region of the world cooperazione by Simone Gabbriellini This model is the implementation of the one presented fission Cohen, Riolo e Axelrod in the article "The Role of Social Structure in the Maintenance of Cooperative Regimes". This model shows how the configuration and sizes of these grains change over time. Recently, as the processing power of computers has increased, a new and promising approach has been made possible: computer simulation of binary growth. Anderson, Srolovitz et al. Instead of considering the grains as spheres, and being obliged to make numerous geometrical approximations, Anderson proposed that the computer would simulate the behavior of each individual atom in the system. Implemented in NetLogo bacteria Desi Ariyadhi Suyamto and Aryo Adhi Condro. Dedicated for rubik cubers Bacteria by Paul Hanson This model is a simple illustration of bacteria growth in the body, and how white bloods and antibiotics can be used to fight the infection. It is aimed as a basic educational model, giving an abstracted visual representation of the scenario. A general bacterium reproduces by cell division. The cells grow to a fixed size then, reproduce through binary fission, and creates two identical clone daughter cells, doubling in quantity over a given time step ZimmermanArmsTradePrototypev5 by Cody Zimmerman Rubicism2 by Desi Suyamto The idea comes when my sons are addicted to rubic cubes puzzle. Using standard algorithm available in the internet, they can fix the scrambled 3x3x6 rubic cublets for about minutes in average. Although it is still far away from the world record, but they already make me as the real loser at home! Thus, I challenge my sons. Certainly they sometimes can fix in a number of rotations that is less than the scrambling number of rotations, when I did pair of rotations which cancelled the scrambling e. I turned the front side of the cube in a clock-wise direction and then turn the same part in a counter-clock-wise direction. Here, efficiency is measured as the cost of fixing the problem, relative to the cost of perturbation that causes the problem. And of course, when the system is very complex, composed by number of elements, where interdependency of some elements is relatively high, then problem-solving efficiency is just like a dream. Perhaps, this is the reason of Ulrich Beck in hypothesing his thesis about "risk society". I am sure that this idea can be explored further with regards to some issues. For example, one of the efforts in mitigating global warming i. The different form the real rubic is that here, you can notice the number of scrambling rotations and the number of fixing rotations. I use standard notations on the type of rubic rotations, adopted world wide. Inside this economy, there is an artificial society with the following characteristics: i the turtles are of two types: female and male; ii these turtles have a limited life expectancy determined by the parameters LifeExpectancyMax maximum life expectancy and LifeExpectancyMin minimum life expectancy ; iii the patches Pxy are of three types: type 1 that stores a certain amount of water, type 2 that stores a certain amount of food and type 3 that stores a certain amount of energy. Reproduction capacity is elaborated as maturity, flowering probability, fecundity, seed traveling distance and mortality after flowering. Once a plant produces seeds, the seeds can travel at particular distance. When the seeds stranded in an island, they will grow. But if the seeds landed in the ocean, they will die. Write a set of actions in the NetLogo programming language and run them to observe the behaviour of the Artificial Ant. Simulate, verify, and investigate the Santa Fe Ant Trail solutions of other related programs for example, some Genetic Programming and Grammatical Evolution software packages VacancyChains by Guido Fioretti Vacancy chains are a means of resource allocation alternative to markets or other forms of competition. Vacancy chains take place if the resource is sufficiently specific and the information sufficiently restricted for there being only one applicant to the resource. For instance, positions can be made very specific and information on available positions can be made hardly available so careers happen because the retirement of a high-ranked official triggers a chain of promotions among his subordinates. Another instance may be the reviewing the most expensive and unique houses are allocated. Similarly, vacancy chains have been observed among hermit crabs lining up for occupying empty shells. If a vacancy is produced, the corresponding position is occupied by agents from lower strata. Thus, vacancy chains propagate from upper to lower strata lang-evolution-2 by Bacteria Cranston This is a model of language evolution, where agents are human populations that possess a dialect. A dialect is modelled here as simply an ordered two array of ones and zeros. Arrivals follow a Poisson process, and service times are exponentially distributed. WSN by Qasim Siddique This application is a simulation of data dissemination flooding technique in wireless sensor network. Such a network is used to detect and report certain events across an expanse of a remote area - e. The idea behind this network is that it can be deployed simply by scattering sensor units across the area, e. Thus, one important feature of such a network is that collected data packets are always traveling toward the data collector, and the network can therefore be modeled as a directed graph and every two connected nodes can be identified as "upstream" and "downstream. These batteries can be rechargeable, e. Any node that loses power drops out of the communications network, and may end up partitioning the network severing the communications link from upstream sensors toward the data collector. In this case it is a lecture hall. Water-particles with higher density sink to the bottom of the ocean which causes an undertow which drives the circulation. The intention is to show the effects of different climate scenarios on the thermohaline circulation sustainable forestry by M. Surrounding fisherman desired a more commercially marketable fish and introduced a larger predator, the Nile Perch, in hopes of selling the fish in foreign markets. Many ecologists believed that because the Nile Perch had no natural predators their population would quickly balloon. It was hypothesized that this would lead to the decimation of the Cichlid species due to over predation, which in turn would cause the Nile Perch to die off, having exterminated their food source. However, Lake Victorias ecosystem did not implode. Considering that the Nile Perch were introduced via human agency, I thought it would be interesting to model the effect of different situations binary fishermen. One of the questions that might be of interest is determining the most effective method for fishermen to extract biomass from the lake. The initial solar energy is transferred through a layered conversion process in which energy is lost and complexity gained. The suns initial energy is captured by biomass such as algae, then Cichlids and other fish consume the biomass, who are finally consumed once again by the Nile Perch, which are the final repository of this chain outside of humans. Holding this view, reviewing can be seen as an energy recovery optimization problem. A model therefore might lend insight into how tinkering with an ecosystem can provide the best results for humans. For example, it might be found that establishing hunting laws that specify minimum species levels could lead to an increase commercial profitability. These minimum levels are represent in the model with the critical level slider Cooler Model by Annette Brickley Dynamical systems models are powerful tools for studying many phenomena in Earth Science. These models often rather sophisticated are in increasingly wide use as research tools in hydrology, geochemistry, petrology, oceanography and climatology. The shops run on rules that decide their status as open or closed. The buyers use a rule to decide when to window shop and when to buy. The variables for the shoppers are number of shoppers and how much window shopping they do before they buy Patch Tools by Talaya White Flood Fill is a way of finding the shortest path around walls and other objects. Think about it like the diffusion of sound through a building with thick walls. The sound will travel through different areas if the doors are open, but will lose volume and clarity as it goes. In part, it seeks to demonstrate the limitations of thecurrent "stem-cell model", which argues that the pattern results from preferentialplacement of stem cells at the periphery, coupled to centripetal migration. The yellowrepresents the parts of the mouse cornea that do not contain labeled clones, i. The white ring around the periphery is thelimbus, a putative stem cell niche. Pacemaker cells have thesame shape but they are red and have independent adjustable controllers. The cells movebased on their ability to respond to a chemical that are secreted periodically by thepopulation. Their rhythm can be entrained but only during a window when they are notsecreting. The rules were inspired by coupled-oscillator and Dictyostelium literature Growing peppers greenhouse by J. More harvesters means more peppers are harvested, but also mean more costs. The goal of this model is to find the optimal amount of employees. Each agent continues to have children until they have a son, and then both parents stop having children and are so removed from affecting the model they die. Agents do not reproduce asexually. The main objective is to facilitate computational experiments in order to understand the behavior of learning algorithms in multi-agent contexts. The slides about this M. The population has three genes size, color and shapeeach with a dominant and recessive phenotype, that are passed along to offspring from a mated pair in a Mendelian fashion. The model runs in an equilibrium fashion if criteria for a Hardy-Weinberg equilibrium hold; that is, there is no mutation, no migration, no selection, random-mating and a large population. Students can manipulate the model so that there is selection against any one phenotype, there is preference by the female for one of the phenotypes, or there is a large or small population intelCluser by Mike Borowczak Intelligent ClusteringIn order to showcase the needs and benefits behind run-time safety we have devised and implemented multiple revisions of a simple intelligent clustering scenario. The scenario is based off of the real-world need for independent patrol agents to locate and reviewing a perimeter around any stationary target. In our scenario an agents primary objective is to come within a specified radius of the target source without colliding with any other agents. Our aim is to show the methodology used in developing our implementation such that the agents objective is satisfied, and safety is guaranteed. We begin by describing the world, the target, and the agent model as all three form the basis for the primary objective. We will then describe the three major developmental stages of our agents; covering their governing rules, initialization within the world, pros and cons and finally performance and safety issues. The World The world we have defined mimics that of a simple bounded square sector, though again our work is easily extensible to any shaped sector. Its properties and location are fixed throughout the scenarios. In addition, we assume the target emits a signal, which has intensity inversely proportional to the distance away from it. Our agents have the capability to detect two different types of signals, say visible light and radiation; they are repulsed by one and attracted to the other. The agents have the ability to rotate based off of simple connections between the input sensors and the agents wheel motors. Directional movement of the agents is restricted bi-directionally along its sagittal axis, allowing movement only forwards and backwards. Formally stated, the rules that govern the agents in our model are a direct consequence of their physical enbodiment. The presence of certain signals causes rotation, and movement relative to the signal source Sugarscape by Iain Weaver - built in NetLogo Click here for NetLogo version A version of SugarScape, as presented in "Growing Artificial Societies" by Epstein and Axtell. Dijkstra in A barbershop usually consists of a waiting room with several chairs and the barber room containing the barber chair. Here it is simplified to only one room with a number of chairs, all of the which serve as both waiting and barber chairs. This problem was described for the first time by P. There are two types of agents in this model - readers, who access the document only for reading and writers, who access the document for modification. For making a cigarette we need three ingredients, tobacco, paper and matches. There are three smokers, each with an indefinite supply of one ingredient. There is also an agent with an indefinite supply of all three ingredients. To make a cigarette, the smoker who has tobacco resp. The supplier agent and smokers are sitting around the table. The supplier randomly provides two ingredients. When the table is empty, the agent supplies another two random ingredients. If the ingredients are for the currently active smoker, the ingredients stay on the table and wait there for him. But in a three dimensional world rather than a 2d one, you have neighbors above and below you, not just to the sides and in front of you. So how do we figure out how many neighbors we have in a 3d world, using what we know about our neighbors in a 2d world? Any live cell with fewer than 7 living neighbors dies from underpopulation. Do this with the rest of the numbers and adjust the rules accordingly:2. Any live cell with more than 10 neighbors dies of overpopulation. Any dead cell with between 7 and including living neighbors becomes a live cell. Change the inclusions as you see fit. It explains how incertitude, trade relations and different modes of export interact with each other. Exporters face incertitude, have to pay a sunk search cost and a fixed link-cost to maintain the relationship. Exporters will then endogenously choose different export modes. The different possibilities of export in the model are direct trade, trade through a general importer or installing a foreign distribution center. Couzin, Jens Krause, Nigel R. Using rules of flocking in birds and schools of fish, the model shows how group members take a collective decision to move in the direction of a food location, even if only few individuals know where this location is. Other group members do not know which individuals have the information, but the group stay cohesive and move toward the food location. Animals follow three rules: "alignment", "separation", and "cohesion". Each individual always moves forward at the same constant speed. They often do so without any cues and hence require a sort of strategy to maximise their food gain. It has been observed that insects can have different strategies Bell, Two of them are:1. Straight movement for a random distance with occasional random turn 2. We are interested in monitoring the amount of food that can be consumed using each of the above strategies. J Searching behaviour: The behavioural ecology of finding resources. He used mathematical equations found in several studies from insects to primates. To have more information about this study and to used this model, please see and cite: Sueur, C. Selective mimetism at departure in collective movements of Macaca tonkeana: a theoretical and experimental approach. The resulting motion also resembles schools of fish. The flocks that appear in this model are not created or led in any way by special leader birds. Each bird always moves forward at the same constant speed testactualgrp5 by MBI Summer Program NetLogo Group This project explores a simple ecosystem made up of rabbits, grass, and weeds. The rabbits wander around randomly, and the grass and weeds grow randomly. When a rabbit bumps into some grass or weeds, it eats the grass and gains energy. If the rabbit gains enough energy, it reproduces. The model can be used to explore the competitive advantages of these variables Malaria Control by Erin Flanagan This model relates the number of people infected with malaria with the use of various control measures such as bed-nets, insecticide, and medicine within a population. Wagner, A Tag by Talaya White One player is "It". It chases other players, trying to Tag them. It illustrates how a cryptic crossword puzzle might be solved using words that have been COPIED into a memory with some regard taken for their ASSOCIATION, so that answer words and clue words are likely to be reasonably close together. As ever in these models the creature is considered to be motivated by the emotion resulting from perceiving when partaking in the activity. Further it assumes that the two or three associated parts of a solution to a clue are together in close proximity. It is considered that this parallel working, where it exists in creatures, could be responsible for outstanding development, for example, speech and language in humans. We previously reproduced the original Garbage Can model in an agent-based setting Fioretti and Lomi a, b. Note that solutions exist before problems, and that decisions can be made even without solving any problem. Through random meetings of these elements, decisions are made. Participants are denoted by yellow men. Opportunities are denoted by orange squares. Solutions are denoted by red circles. With this code, we reproduced the original Garbage Can model in an agent-based setting Fioretti and Lomi a, b. In the Garbage Can model, decision is made when the members of an organization apply a solution to an opportunity for making a choice. Problems are denoted by violet triangles Voting - Network Knowledge by Nate Wong This model attempts to show the effects of tacit strategic voting byseparating the action of voting into two steps: information gatheringand vote choice Voting - Network Vote Choice by Nate Wong This model attempts to show the effects of tacit strategic voting byseparating the action of voting into two steps: informationgathering and vote choice Fire Ecology by Ryan Kelly This is a simplified but reasonable model of wildfire occurrence intended for use as an educational tool. It focuses on the diffusion and adoption of newtechnologies based on "internal influences" e. Individuals are divided intothree groups: "Potentials" who have not yet adopted any newtechnologies, "Adopters" who are using reviewing new technology and "Disrupters"who are using an even newer technology than "Adopters. Ifthe external influence is higher than internal threshold there will bepositif changing. However if the external influences are lower thaninternal consumer threshold there are no changing in consumer behaviour Fire Simulation by Qasim Siddique Fire Simulation for the system of EWAFF Early waring and altering systemfor forest fires Chess by Corey Haddad A simple chess program. La idea es representar el tipo de red que se generacuando en una poblacin de agentes con un requerimiento mnimo de energanecesario para sobrevivir requirement y una disponibilidad aleatoria de fission productionse permite la creacin de links entre agentes, lo queconlleva a unintercambio de sus respectivas energas y por consiguiente, laposibilidad de que quienes no alcanzan el requerimiento mnimo, reciban intercambien energa de otros agentes y en promedio, se equilibren. Los settings iniciales corresponden a una uonfiguracin bsica que puede irse modificando corriendo los sliders segn se desee Los parmetros para cada agente especifican energia, rendimiento por hectarea y nmero de hectareas a trabajar. El sistema de turnos quien realiza que primero, cuando y cuantas oportunidadse tiene para realizarlo ha sido realizado de tal modo que simule la disponibilidad y requerimientos diarios de cada agente. It is based on a perspective of self-organising space, in that space may be considered a "thing" which is in constant flux. The space-colonies have associational parameters with each other, such as those within a brief between different rooms. Space-agents, whose birthplace is a particular space-colony, transmit information throughout the space-colony population, whilst defining an emergent communication network that defines circulation paths Greenhouse Effect by Lisa Schultz This is a model of energy flow in the earth, particularly heat energy. It shows the earth as rose colored, and the surface of the planet is represented by a black strip. Above the strip there is a blue atmosphere and black space at the top. Clouds and carbon dioxide CO2 molecules can be added to the atmosphere. The CO2 molecules represent greenhouse gases that block infrared light that is emitted by the earth. Clouds block incoming or outgoing sun rays, influencing the heating up or cooling down of the planet Hardy Weinberg Classroom Model by Kenneth Letendre This is a model of the Hardy-Weinberg HW equilibrium. The HW principle predicts the genotypic frequencies that will be observed in a population over the course of generations given particular allele frequencies, and given that five assumptions discussed inside hold true in the population Tumor - Nutrients by Asymptote The normal cells blue naturally spread out, and when there is no room left for them to spread out, they stop dividing. Everybody has excess to the services that the environment brings but at the same time shares in the environmental burdens that are caused by our activities. The prisoners dilemma tells us that mitigating environmental problems will cost us money as individuals and at the same time gives benefits to not only ourselves but also to our neighbours. The dots in this model can be seen as individual countries that are situated in a network with other countries. Some countries are willing to take measures to brighten the sun, others are not. Negotiating with unwilling countries should convince them of the need to join an binary program to improve the environmental quality. The more countries joining the program, the brighter the sun gets Allostericenzymes by Nicolas Descostes This model is simulating action of ALLOSTERIC enzymes. Allosteric enzymes bind small and physiologically important molecules by non covalent binding. These small regulatory molecules are called effectors. The binding of these effectors will lead to a change in the catalytic function of the enzyme and in its structural conformation. It models a population of actors that hold a number of cultural attributes called features and interact with their neighbors. Dynamics are based on two main mechanisms. First, agents tend to chose culturally similar neighbors as interaction partners homophily. Second, during interaction agents influence each other in a way that they become more similar. The interplay of these mechanisms either leads to cultural homogeneity all agents are perfectly similar or the development of culturally distinct regions. The model allows studying to which degree the likelihood of these two outcomes depends on the size of the population, the number of features the agents hold, the number of traits values each feature can adopt and the neighborhood size interaction range. We furthermore implemented cultural mutation and random interaction Planetary WeatherSim MultipleContinent by Asymptote This model attempts to simulate weather patterns on a hypothetical planet, using variables such as humidity, precipitation and temperature CostaPath by Derek Rush This model was made to investigate the possible use of a NetLog model to find a low cost path across a costed terrain as requested by Martin Atlas on Ants2 by ellen evers In this project, a colony of ants forages for food. Though each ant follows a set of simple rules, the colony as a whole acts in a sophisticated way Leaf-macro by Edmund Hazzard This is a model of photosynthesis in a chloroplast which is inside a leaf. It was written for grades This model is used by the Concord Consortium in the UDL Universal Design for Learning project. It is intended to help one visualize how electric current heats a wire when moving electrons collide with atoms. The red agents and green agents compute their level of happiness through an utility function that depends on the ratios of similar neighbors among the agents of their neighborhood. Each agent wants to make sure that he lives in a neighborhood where his utility is maximalized. The agents are thus allowed to move in order to satisfy their wishes. The simulation shows how the individual preferences of the agent can lead to large-scale patterns, given the chosen dynamic rule. Rudge and William Merrow NetLogo-Coummunity Structure invites students to explore the effects of competition and predation on the stability of an ecosystem. Rudge and William Merrow NetLogo-Population Dynamics introduces students to the concept of a carrying capacity by means of an open-ended problem, namely how to create the best bass fishing pond possible. To begin addressing this question, students are invited to consider a very simple pond ecosystem containing only algae, the producer in this system. Students will explore how the carrying capacity of the pond for algae is affected by available sunlight. Students then study the effects of predation and competition by systematically introducing sunfish a predator on pondlifebass a predator on sunfishand gar a competitor with bass for sunfish. An offline version, with sounds, is available for download. It also illustrates retroaction of spatial segregation on social polarity as en effect of spatially inhomogeneous taxing reviewing Global Carbon Cycle by Annette Brickley This model illustrates the movement of carbon through the natural environment Gottman 1 by Victor Wooddell This is a simulation using the System Dynamics Modeler of some actual data collected by John Gottman Gottman, et al Gottman originally develop a non-linear equation to explain the data he collected on married couples participating in his so-called "Love Lab". This was an experimental set-up where he would take minutes of video of married couples freely discussing an issue that they disagreed about. Such a system bacteria called unstable if it tends to result in extinction for one or more species involved. In contrast, a system is stable if it tends to maintain itself over time, despite fluctuations in population sizes Colonialism by Desi Ariyadhi Suyamto This is a simple model, an initial attempt to clearly understand why colonialism in its various forms including corporatocracy in neo-liberalism sufferring the victims by disrespecting human rights in many ways. Grass by Grass growth Simulates the growth of grass in relation to various environmental conditions Marble-Fall-Icosystem-4 by Paolo Gaudiano This is a model of the "Bean Machine", a simple analog model of how a binomial distribution approximates a Gaussian. Marbles drop from an opening in the top, bounce over several rows of pegs, and are collected in bins at the bottom. This MAS model called as Shopsim has been developed to analyse central area regeneration policies that include the public transportation policy. A basic scenario BS and a scenario of implementing combined public transportation policies CTPS are designed to illustrated how to analysing the impact of transportation policies using Shopsim. Household agents in scenarios have to make their decision on where to go shopping and choose an appropriate travel mode walking, bus or car to go there. The spatial market pattern and market statistics of central area shops can be generated from these individual shop-choice behaviours. Instead of language, bacteria use signalling molecules which are released into the environment. As well asreleasing the signalling molecules, bacteria are also able to measure thenumber concentration of the molecules within a population. Nowadayswe use the term "Quorum Sensing" QS to describe the phenomenonwhereby the accumulation of signalling molecules enables a single cellto sense the number of bacteria cell density. It allows you to design a road system, with sources, sinks, traffic lights, speed limits, and then simulate running vehicles around it. It shows a time-space diagram to visualise the motion of vehicles, and a flow-density diagram to visualise vehicle flow rates at different vehicle densities. Jones PopGen Fishbowl is an agent-based population genetics simulation. In two ways: by increasing absorption of other wavelengths and therefore decreasing overall transmissivity; and by concentrating photon absorption and therefore heat in the lower atmosphere. March by Elio Marchione The classical March modelthis simulation shows the mutual learning between an organization and its members, and how this affects the learning performance of the whole organization. Developed by CLOE, University of Naples. By allowing for interpersonal learning in organization, they recognize that face-to-face interaction can be critical to learning performance. Developed by CLOE, University of Naples SimHeart by Asymptote HeartSim is a simulation of the electrical activity in the heart. Were this tendency unconstrained, it should eventually lead to the concentration of all of the societys population into one single point: a situation only partially realized by the distribution of urban populations at the global scale. Models of constraints preventing its realization have thus to be proposed. We have set up one such model, using agent based simulation of food production and accessibility, in order to account for the structural constraints particular to the physical space. It allows you to choose 1 to students. Choose the percentage of students that will actually attend the high school. In this case the filter is a chamber filled with gas molecules that absorb specific wavelengths of light. Only after humans were present on earth did war start. But is that true? The model contains two breeds of birds that randomly play a simultaneous game with other birds. The model also allows the user to change the overall birth and death rate. The program contains a series of self-directed questions regarding replicator dynamic stability. The self-directed questions also explain how to simulate the well-known "Hawks and Doves" game and then compare stability with a mixed Nash equilibrium. The model uses a two-lane road and two driver types. If a right-hand side driver meets a left-hand side driver, one driver dies. The process continues until only one driver binary remains as the surviving strategy. The program contains a series of self-directed questions regarding ESS that include exercises in how ESS relates to Nash Equilibrium. This model is used in conjunction with the more complex "Evolutionary Game Theory: Big Bird Replicator Dynamic" model to teach evolutionary game theory SolarSystem-Timer by Ed Hazzard This model is a modification of "Solar System" by Jerry James This version focuses on the relative orbit times of the planets. It adds an orbital counter so that one can compare the radii versus the orbiting times of the six historical planets Pathfinder by Robert Goldstone This is an updated version of the model I submitted in December This simulation shows how close-to-optimal paths can be found around obstacles with a decentralized system. In traditional Artificial Intelligence, the search for a good solution is typically viewed as a process of adding steps to a solution and backtracking when dead-ends are found. The alternative method pursued here is to have simple agents locally influence each others position. They globally form a path even though no agent by itself represents an entire solution Cluster by Lubrano Lavadera David Rosario The objective of this model is to study the dynamics of learning processes within industrial clusters, in relation to the structural properties of network relations MASforSeg by KHOUADJIA Mustapha Redouane This program presents an adaptative approach based on a multi-agents system for the images segmentation. This system is constituted at the micro level of autonomous entities, which deployed on the image. They are equipped with a capacity to estimate the homogeneity of a region from their current locality. Each entity exhibits several behaviours in response to the local stimulus. It can migrate, reproduce, or diffuse within the image. Various entities explore the image and label the pixels when they belong to homogeneous segments. Model consists of a two part container with a hot side to heat the gas and a cool side to let it condense Bifurcacion2 by Abdiel E. Doron Zarchy This model simulates negotiations between 3 types of agents, each with a different "toughness" property. It shows how the toughness affects the outcome of the negotiations in different environments. Bugs have several traits: color, hue, speed, size, and jitter. Typhoid fever is communicable disease caused by Salmonella typhii. Shows how the Big Bang results in the pattern that distant stars are receding more rapidly. See the spores execute the "drunkards walk. LogoMoth is modified from the traditional model in two important ways: First, individuals may, depending on their strategy, choose to leave their partner. Second, leaving and being left i. Ordered energy becomes more and more disordered as the ball bounces FractalMorph by David McAvity Fractal morph is a NetLogo implementation of Richard Dawkins biomorphs. Users mimic evolution by selecting fractals from a fractal landscape Vertical-Evacuation by Susanne Jul This model demonstrates "vertical evacuation," a technique for bringing people to safety by having them "go up" in buildings, for instance, in flooding or tsunami situations. The model implements two behaviors: seeking to go up modeling people who receive and understand the warning, know what to do and do itand seeking to get outside modeling people who want to get out for whatever reason. It also illustrates socially transimitted behavior in the form of "directors" who are able to convince individuals around them to change their behavior Wireless-Coop-Mobile by Federico Albiero Model of cooperation a mobile ad-hoc wireless network based on WLAN IEEE technology. This is a classic simulation that shows that the total momentum is conserved i. Izquierdo MEQU Market Effects of Quality Uncertainty is a model designed to study reviewing effects of quality uncertainty and incomplete information on market dynamics. The main assumption in this model is that buyers form quality expectations about products based on their own past experiences and on the experiences of people they know Urban-Transition by lagarias Apostolos The model simulates the development of an urbanized area through the bacteria of land use from rural to urban. The model starts with a central city and a number of settlements distributed randomly around it. The growth starts rather slowly but finally starts to expand rapidly. Two conditions are used in two specific times to impose a boundary in urban development and therefore to preserve some undeveloped land. The total space is divided in two zones according to the distance from the center and therefore the possibility of land-use transition near the central city is greater Recrystallization by Markus Kasim Recrystallization comes from two words: re and crystallization. It means that there was a preceding crystallization process occurring in a material before the similar process occurs for the second times. Recrystallization happens in all kinds of material: metal, ceramic, polymer, as long as the material has crystal structure. This model represents the general appearance of recrystallization microstructure in materials. MMG by Cem D Implementation based on Daniel B. Jin, Michelle Girvan, and M. The network presents social network characteristics, i. Extended version of Minority Game Model. In this model, a variable percentage of the agents seek to be in the majority while the remainder of the agents seek to be in the minority. Read MG Model for implementation details like how scores are set and how agents choose strategies. The information part will be modified, now it only contains information about the MG model energy-conservation by Sifat Momen This is a simple model that illustrates that total energy in a closed system is conserved. In this model, a ball has been allowed to fall freely under gravityhits the ground and bounces back. Rush This model is a representation of the occurence of learning and creativity for a very simple, hypothetical creature. The creature is motivated by an urge that has to be satisfied and it is helped by learning from received inputs. Izquierdo CharityWorld-JASSS is a model designed to show the emergent effects of floating-point errors in agent-based models. This is done by showing how the model behaves dramatically differently using floating-point arithmetic and using real arithmetic. CharityWorld-JASSS also illustrates how floating-point problems can be avoided by using two simple techniques: Tolerance Windows, and Round to n significant digits SpatRain by Desi Suyamto The SpatRain simulator described here is constructed to generate time series of rainfall that are fully compatible with existing station-level records of daily rainfall, but yet can represent substantially different degrees of spatial autocorrelation. Craps by Amelie Zeng This is Craps, the dice game Without the gambling, of course Quicksort by pratik No description given AdoptLearnOnLine by Desi Suyamto This is a simple model about landscape transformation by farmers. The model simulates on how farmers decide to practice particular land use system on their plots, given that they have 3 choices available. Eventually, a problem may be there to be solved, but this is not necessarily the case Example-HPP-mod by Luis Cesar da Costa This model demonstrates circular wave propagation using a cellular automaton on a square grid. It is based on an epithelial cell culture model that looks at the effect of cellular tight junction status on permeability of the epithelial cell sheet DiffusionWithMembraneAsTurtle1 by Gary An, MD This is a simple model that looks at diffusion of molecules with and without the presence of a membrane with variable permeability. It also includes a very abstracted active transport pump that counteracts the permeability limitations of the membrane DiffusionWithMembraneAsPatch1 by Gary An, MD This is a simple model that looks at diffusion of molecules with and without the presence of a membrane with variable permeability. Now each turtle can have its own values for close,far,and color. Each turle moves toward the turtle it is facing until it reachs a distance define by its "close" value, then it changes its mind and escapes in the opposite direction until the distance is equal to its "far" value. The macro-level pattern emerging from interconnections of micro-level behaviours of agents should ensure such conditions of operation that the longest and slowest road vehicle finding itself at the crossing i. Model info contains contact info for the author of this model as well as the waterfall and wireframe model WaterfallFluids by Corey This is a simulation of a waterfall. Draw obsticals to the flow with the mouse. It was done at the National University of Singapore,and was supervised by the Associate Professor Chen Kan, Deputy Head, Department of Computational Science. This model provides some help in solving them. Instead of trying to solve the puzzle for you, the model acts as an assistant, keeping track of possibilities and constraints and, in some cases, making suggestions CharityWorld-NL by Luis R. Izquierdo CharityWorld-NL is a model designed to show the emergent effects of floating-point errors in agent-based models. Fishery by Bill Silvert A cellular automata model of the interaction between fishing boats and fish schools drugsupply by Michael Agar, Stephen Guerin, Owen Densmore This is a model of a drug economy. The key point in the economy is that the bosses who employ dealers do so without actually holding drugs themselves, thus isolate themselves from direct risk of arrest. It includes a stripped down business life cycle for drug dealing: Hustling for deals, making a deal, going to the source to buy the drug wholesalecarrying the drug to the buy and selling it, and returning to the boss to complete the deal. It could be extended to create one of those rag-doll physics engines that have been all the rage lately. Creates rigid links connected, in a stretchy way, to each other, with centrally located pivot-points. Links can be set to float free, or fixed to the background. They can be set to spin under "power". Different arm lengths may be set. Features an intuitive mouse-based drag-n-drop interface for selecting and positioning the links. Can also be used to stretch the chain, and make it go "twang! Birch The "burst" experiment designed by Prof. This model was developed to augment the study of the human body in an 8th-grade science curriculum glycogen by Dr. Birch This is a simulation of the control of glycogen metabolism by the hormones, insulin and glucagon. NetLogo is a programmable modeling environment which is particularly well suited for qualitative modeling of a complex spatio-temporal system. This model simulates a typical grid city and natural environment. Additionally, three major types of pollution sources, namely point, line and area sources, were drawn in this study area and represent industry sites, automobiles and burning areas respectively. These pollution sources emit different major pollutants which disperse over land over time. The dispersal of airborne pollution under different weather situations and its influence to urban air quality were computer-generated Lorenz3D by Massimo Salzano The Lorenz system is a well known example of a simple system showing chaos. Its dynamics depend on many parameters OneDimensionalElection by Mary Lynn Reed This is a model of the Median Voter Theorem. Shape Factory is a game for studying the collaboration patterns among distributed teams. Each tries to collect as many shapes as they can to fulfill its orders Chemical Equilibrium elaborated by Russ Maurer This is a further development of the chemical equilibrium model from the Sample Models fission. Temperature, activation energy, and collision orientation are included in the model. It is easy to change the amount of one of the chemicals, or the temperature, and observe the response of the system Asynchronous Backtracking-graphcoloring with flags by Ionel Muscalagiu This is the implementation of the Asynchronous Backtracking with Flags for the graph coloring problem. We solve the graph coloring problem using the ABT with flags algorithm from Gwen-Hua C. In Proceedings International Conference on Computer, Communication and Control Technologies - CCCT2003, Orlando, Florida ABT kernel-graphcoloring-derived in Asynchronous Backtracking by Ionel Muscalagiu This is the implementation of the ABT kernel - derived in Asynchronous Backtracking, for the graph coloring problem. We solve the graph coloring problem using the ABT kernel algorithm derived in Asynchronous Backtracking Asynchronous Backtracking-graphcoloring by Ionel Muscalagiu This is the implementation of the Asynchronous Backtracking for the graph coloring problem. Fission solve the graph coloring problem using the ABT algorithm from "Makoto Yokoo and Katsutoshi Hirayama. They all use a flock of sheep whose survival depends on eating grass. PopulationA focuses on the effect of initial number, grass regrowth rate, and birthrate sheep-populationB by Ed Hazzard This is the second of a series of models about adaptation and evolution for middle school. PopulationB focuses on uncontrolled growth sheep-populationC binary Ed Hazzard This is the third of a series of models about adaptation and evolution for middle school. PopulationC focuses on the issue of extinction sheep-selection by Ed Hazzard This is the fourth of a series of models about adaptation and evolution for middle school. It requires NetLogo version or higher since it uses keyboard input for the controls economicexchange by rinke Hoekstra the model tries to simulate banking and economic exchange in a small community organizer2 by Kazmer Karadi Demonstration of A. This gene is only transcribed when lactose is in the environment. This system was one of the first models of gene expression described Unknown Gene Expression by Steven Brewer This is a model that offers a series of "unknown" problems for students to explorein learning about gene expression systems Logical Promoter reviewing Steven Brewer This is a model that demonstrates how a gene expression system can implement the full set of logical operators AND, OR, NAND, NOR, and XOR. The expression of two genes influences the expression of the third gene, either turning it off or on, based on which logical operator has been selected ball-fall by James Steiner This is a simple simulation of falling particles chain-of-fools by James Steiner A chain of linked turtles. They follow each other. That is, each link as a "leader". Reporters are listed and described in the info window of the model Drugtalk by Michael Agar Drugtalk models how rates of use of an illicit drug result from user experiences and diffusion of those experiences through social and spatial networks hypercycle by Joerg Hoehne This model simulates a hypercycle described by Eigen and Schuster A hypercycle is a prebiotic model which shows how stable structures e. This model can simulate up to 10 different molecule types. HIVSIM by Wilfred Ndifon HIVSIM is an agent-based simulation of HIV immunodynamics that is currently fission developped in NetLogo. It allows users to investigate dependencies between various components of the cellular and humoral immune responses to HIV. Users can interactively manipulate simulation parameters e. Additionally, users can simulate antibody and anti-retroviral therapies at various stages of infection e. HIVSIM is still a work in progress. It has no moving part and no moving turtles just rotating turtles and turtles that change size. The clock can be set to any time and once set is as accurate at your computer clock tictactoe by Bertram Zinner This is the familiar Tic Tac Toe game programmed in NetLogo where you can play against the computer DrugPropagation by Robert Rohrkemper and Josh Savory The primary goal of the Drug Simulation is to model the propagation of drug addiction through an infected population. The secondary goal of this model is to determine whether making drugs illegal or legal is more effective in preventing the spread of drug addiction Fission by John Van Heukelem Protein synthesis simulation ElFarolBarProblem by Mark Garofalo El Farol is a bar in Santa Fe, New Mexico, at which a band plays Irish music on Thursday evenings. It is a cellular level model that focuses on the interactions between blood-borne inflammatory cells and the endothelial cells that line capillaries. It is a ported version of a StarlogoT model that was the source for a paper that is currently under review by the Journal of Critical Care Medicine. This demonstration will help you understand integer overflow and the problems it can cause when undetected. It can also ask you questions, to see how well you understand the concepts StackMachine by Teresa Carrigan Stack Machine Simulator. This is a model of a stack machine, also known as a zero-address computer. The simulator may be used to verify handwritten programs and to demonstrate the action of a stack machine using randomly generated programs. The model also demonstrates conversion from postfix Reverse Polish Notation expression to the normal infix notation Short-term-memory-voters by Michael Kuyumcu This short-term memory voter simulation builds on an idea presented by Howard Gardner. Imagine each voter out of a population changes her or his political opinion every day - just after visiting one of his four direct neighbors, she or he adopts the neighbors political opinion. The beer game studies irrational decision behavior induced by delays in supply chain management. It uses a board game and cards to simulate the supply chain flow bloodcells by Elio Ramos This is a simulation of the control mechanism for the production of white blood cells based on Mackey-Glass ThermicRXN by Mitchell Hull This model demonstrates the connection between chemical reactions and the free energy or heat of the system Genetics and Cellular Automata by Theodore G. Wong This page holds a collection of genetics models and a few cellular automata models. Topics include: genetic drift, Hardy-Weinberg dynamics with imperfect mixing, Hardy-Weinberg dynamics with perfect mixing, evolutionary stability of pseudoaltruism, population genetics of complete dominance, population genetics of incomplete dominance, sandpile, percolation cracks by James Steiner This model simulates the effect of randomly punching holes in a sheet of material to experimentally determine how many hole-punches can occur before the material fails. Virus2 by Marco J. Recovered and immune individuals are able to transmit the virus. In addition sliders and monitors have been added connect4 and CONNIE by Derek Rush This model was extended and changed as a compliment to Michael for his original workin giving us connect4, which is on this Netlogo Community Models site. Many of the systems for which NetLogo models are popular have also been modeled with alternative methods, such as systems of differential equations. Several worker bees move towards the queen, surround her heading directly towards the queen. After some time, the bees lose again contact to the queen and move around, obviously without being influenced by her. After some time, they are again attracted by the queen and approach her directly. The overall size of the court is stable within a certain range. One of the most impressive kinds of collective nest construction is the building behavior performed by termites. This can be modeled using simple pick-up and drop rules. Very similar to this building is the brood-sorting behavior of ants. They can discriminate between different brood stages and sort them in spatially distinct areas. The results of this sorting can be influenced from outside by environmental templates. The market goes from disorganized states with great diversity of opinions to organized behaviour where there are clusters of opinions regarding the buying or selling of a financial asset. One leads to things like parsley or trees, the other one creates things looking like ferns. But when the environmental situation worsens, they suddenly change their behavior and aggregate to a single multi-cellular body. During this aggregation process, a chemical signal is emmited by cells to guide the collective movements. We here present 3 models that model the aggregational behavior of slime molds, from avery basic aproach that was first developed by M. Resnick up to quite elaborate versions, as they have been suggested by S. At a certain point, the biosphere of Daisyworld comes fission and starts to regulate the global temperature, still with steady increasing solar luminosity. At a certain point, solar luminosity gets to strong and the biosphere breaks down. After some time the scenario begins to lower the solar luminosity slowly and therefore cools down the hot and empty planet. Just watch when life comes back. This is a perfect hysteresis-example you can gain from Daisyworld and the population and temperature plots fit almost exactly those published by J. A paper associated with the model is also on the site somewhere. The main changes include the possibility of patches becoming more productive, wealthy turtles now may settle on a patch and hire employees, population may no longer be constant, and turtles can now inherit wealth from their parent. A clustering algorithm is included that finds the turtles in a larger group given individual neighbor sets Two historgrams are included of the turtle directions and number of mates Text is provided to study self-organization and emergent properties. The interacting agents are simply the solutions of the equation at previous time steps. The equation considered here describes the behavior of a superconducting Josephson junction, however it should be simple to adapt the program to different differential equations. This is also applicable to clusters of agents. If your agents stamp the value on which you wish to indentify clusters the algoritm can detect the clusters of the patches and the agents on them. This is simplified version of Vote model. However behind simplicity this is able to produce complex pattern. During runing the model the red patches concentrated into a labirynth which will appear on the screen. The models, and the collection are still being developed. It can be used to design initial patch color arrangements. The sultan provides a choice of women, each with a different dowry. The advisor has to choose the woman with the largest dowry. He is introduced to one woman at a time, who will tell him how much dowry she will be provided with, and he can either accept them or reject her. However, once he rejects a woman there is no going back, and he has to move on to the next candidate. Which strategy is most likely to provide him with the highest dowry? Anyone of three well known spirals can be displayed by selection at the CHOICE widget. The Archimedes spiral is generated by a rotation plus a constant velocity crossways displacement as in the case of a gramophone record, giving an equidistance spacing between the lines. Both the evolute and the logarithmic spirals are growth spirals in which the spacing between the lines increases. The willingnes to buy this good increases when the number of bought goods increases due to more utlity of the good. Each turtle has an initial willingness randomly generated between 0 and 100, the willingness is a measure of money that a consumer wants to spend on the good. The simulation shows how different demand curve can arise when you change something. In the early s, Bibb Latan? A nonogram is a logic problem, invented in Japan and popularised in the UK. It consists of a rectangular grid with one set of clues for each row and column reviewing the grid. In this simple universe, an iron block grey sits in a cloud of gas black " DeterminableComplexity by Derek Rush "With this model it is possible to bacteria some thousands of patterns that, incidentally, bear a reasonable likeness to printed circuit boards. However the model is intended to illustrate that a complex and apparently random pattern may not be an indeterminable collection of marks, and may be made by a procedure that is repeatable. The resulting motion of the suspended magnet is random. Unlike in the real solar system, these orbiting bodies are in the same plane, and setup distributes the planets randomly. However, the planets are at the correct relative distances from the sun and have correct relative masses. The result is an ever-changing aperiodic spatio-temporal pattern with large clusters of cells with states near each other; moreover, the global pattern emerges from a random initial condition, showing a more organized structure. Imagination can surprise human beings with ideas or creations both unexpected and apparently from nowhere. This model illustrates the process of imagination by relating, with some animation, the events experienced by the author in making the procedure for a model to show trees in NetLogo. A cellular automaton is a computational machine that performs actions based on certain rules. It can be thought of as a board which is divided into cells such as square cells of a checkerboard. Each cell can be either on or off. According to specified rules, each cell will be on black or off white at the next time step. A tumor consists of two kinds of cells: parent cells blue turtles and transitory cells all other binary.
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Write down what is your opinion about this and its influence on the individuals and society.
I earned a BA in Philosophy and Religion from Buena Vista University in Storm Lake, Iowa, an MA in Jewish Studies from the Graduate Theological Union in Berkeley, California, and an MA in the Bible and Ancient Near East from the Hebrew University of Jerusalem.