I am interested but worried about the development of this relatively new class of models which tend to fight against very long standing principles in science that seek for simplicity in abstraction and application. Agent-based models (ABM) have developed for spatial systems through advances in computing that enable distinct objects to be defined with respect to their behaviours which in turn su...

Research comparing centralized and decentralized coordination schemes is often contradictory. For example, Oskar Lange (1969) among others points out that the centralized coordination scheme can outperform decentralized schemes while Arrow and Debreu (1954) show otherwise. This paper focuses on this issue in the context of agent-based marketplaces. Specifically, we use a computational approach ...

A generalized Verhulst model subject to seasonal change in both fertility rate and carrying capacity is outlined. Numerical solutions to the Verhulst equations are employed to obtain optimal fertility rate phase shift with respect to carrying capacity. Possible natural selection for a preferred season of conception is investigated using agent based simulations. Both experiments indicate that sy...

Collective cell spreading takes place in spatially continuous environments, yet it is often modelled using discrete lattice-based approaches. Here, we use data from a series of cell proliferation assays, with a prostate cancer cell line, to calibrate a spatially continuous individual based model (IBM) of collective cell migration and proliferation. The IBM explicitly accounts for crowding effec...

extended abstract introduction the fertility transition in iran has pass through different stages from 1972-2015.the total fertility rate (tfr) decreased from 7.7 in 1966 to around 6 in 1976.then it rose to 7 in 1980.tfr decline to 5.5 in 1988.in 1996,thetotal fertility rate reach to 2.8,more than 50% decline. tfr has declined further and reached 2.17 in 2000, and 1.9 in 2012 i.e. below replace...

We present an extension to IBM Model 1 for training word-to-word lexicon probabilities. This model takes into account a given fixed segmentation of the source and target sentences in the estimation of the statistical dictionary. Our experimentation on the Europarl corpus shows that a statistical consistent improvement in the translation quality can be achieved by including our proposed model as...

introduction: studies have indicated a global high prevalence of hospital malnutrition on admission and during hospitalization. clinical nutritional risk screen (cnrs) is a way to identify malnutrition and manage nutritional interventions. several traditional and non-computer based tools have been suggested for screening nutritional risk levels. the present study was an attempt to employ a comp...