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Tierra (computer Simulation)
Tierra is a computer simulation developed by ecologist Thomas S. Ray in the early 1990s in which computer programs compete for time (central processing unit ( CPU) time) and space (access to main memory). In this context, the computer programs in Tierra are considered to be evolvable and can mutate, self-replicate and recombine. Tierra's virtual machine is written in C. It operates on a custom instruction set designed to facilitate code changes and reordering, including features such as jump to template (as opposed to the relative or absolute jumps common to most instruction sets). Simulations The basic Tierra model has been used to experimentally explore '' in silico'' the basic processes of evolutionary and ecological dynamics. Processes such as the dynamics of punctuated equilibrium, host-parasite co-evolution and density-dependent natural selection are amenable to investigation within the Tierra framework. A notable difference between Tierra and more conventional mode ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tierra , a type of crown or headpiece
{{disambiguation ...
Tierra may refer to: Astronomy *Earth in the Spanish and Asturian language Computing and games * Tierra (computer simulation), a computer simulation of life by the ecologist Thomas S. Ray * Tierra Entertainment, now known as AGD Interactive, a non-profit game company specializing in remakes of classic adventure games by Sierra Entertainment Film * ''Tierra'' (film), a 1996 movie by the Spanish filmmaker Julio Medem Music * Tierra (band), a Latin R&B band from the 1970s and 1980s Albums * ''Tierra'' (Tierra album), a 1973 album by Tierra * ''Tierra'' (L'Arc-en-Ciel album), a 1994 album by the Japanese rock band L'Arc-en-Ciel See also * Tiara A tiara (from la, tiara, from grc, τιάρα) is a jeweled head ornament. Its origins date back to ancient Greece and Rome. In the late 18th century, the tiara came into fashion in Europe as a prestigious piece of jewelry to be worn by women ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Natural Selection
Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the change in the heritable traits characteristic of a population over generations. Charles Darwin popularised the term "natural selection", contrasting it with selective breeding, artificial selection, which in his view is intentional, whereas natural selection is not. Genetic diversity, Variation exists within all populations of organisms. This occurs partly because random mutations arise in the genome of an individual organism, and their offspring can inherit such mutations. Throughout the lives of the individuals, their genomes interact with their environments to cause variations in traits. The environment of a genome includes the molecular biology in the Cell (biology), cell, other cells, other individuals, populations, species, as well as the abiotic environment. Because individuals with certain variants of the trait tend ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Systems Biology
Systems biology is the computational modeling, computational and mathematical analysis and modeling of complex biological systems. It is a biology-based interdisciplinary field of study that focuses on complex interactions within biological systems, using a holistic approach (holism instead of the more traditional reductionist, reductionism) to biological research. Particularly from the year 2000 onwards, the concept has been used widely in biology in a variety of contexts. The Human Genome Project is an example of applied systems thinking in biology which has led to new, collaborative ways of working on problems in the biological field of genetics. One of the aims of systems biology is to model and discover emergent property, emergent properties, properties of cell (biology), cells, tissue (biology), tissues and organisms functioning as a system whose theoretical description is only possible using techniques of systems biology. These typically involve metabolic networks or cell ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mathematical Model
A mathematical model is a description of a system using mathematical concepts and language. The process of developing a mathematical model is termed mathematical modeling. Mathematical models are used in the natural sciences (such as physics, biology, earth science, chemistry) and engineering disciplines (such as computer science, electrical engineering), as well as in non-physical systems such as the social sciences (such as economics, psychology, sociology, political science). The use of mathematical models to solve problems in business or military operations is a large part of the field of operations research. Mathematical models are also used in music, linguistics, and philosophy (for example, intensively in analytic philosophy). A model may help to explain a system and to study the effects of different components, and to make predictions about behavior. Elements of a mathematical model Mathematical models can take many forms, including dynamical systems, statisti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Russell K
Russell may refer to: People * Russell (given name) * Russell (surname) * Lady Russell (other) * Lord Russell (other) Places Australia *Russell, Australian Capital Territory *Russell Island, Queensland (other) **Russell Island (Moreton Bay) **Russell Island (Frankland Islands) *Russell Falls, Tasmania *A former name of Westerway, Tasmania Canada *Russell, Ontario, a township in Ontario *Russell, Ontario (community), a town in the township mentioned above. *Russell, Manitoba *Russell Island (Nunavut) New Zealand *Russell, New Zealand, formerly Kororareka *Okiato or Old Russell, the first capital of New Zealand Solomon Islands *Russell Islands United States *Russell, Arkansas *Russell City, California, formerly Russell *Russell, Colorado *Russell, Georgia *Russell, Illinois *Russell, Iowa *Russell, Kansas *Russell, Kentucky, in Greenup County *Russell, Louisville, Kentucky *Russell, Massachusetts, a New England town **Russell (CDP), Massachusetts, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Avida
Avida is an artificial life software platform to study the evolutionary biology of self-replicating and evolving computer programs (digital organisms). Avida is under active development by Charles Ofria's Digital Evolution Lab at Michigan State University; the first version of Avida was designed in 1993 by Ofria, Chris Adami and C. Titus Brown at Caltech, and has been fully reengineered by Ofria on multiple occasions since then. The software was originally inspired by the Tierra system. Design principles Tierra simulated an evolutionary system by introducing computer programs that competed for computer resources, specifically processor (CPU) time and access to main memory. In this respect it was similar to Core Wars, but differed in that the programs being run in the simulation were able to modify themselves, and thereby evolve. Tierra's programs were artificial life organisms. Unlike Tierra, Avida assigns every digital organism its own protected region of memory, and execute ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Artificial Life
Artificial life (often abbreviated ALife or A-Life) is a field of study wherein researchers examine systems related to natural life, its processes, and its evolution, through the use of simulations with computer models, robotics, and biochemistry. The discipline was named by Christopher Langton, an American theoretical biologist, in 1986. In 1987 Langton organized the first conference on the field, in Los Alamos, New Mexico. There are three main kinds of alife, named for their approaches: ''soft'', from software; ''hard'', from hardware; and '' wet'', from biochemistry. Artificial life researchers study traditional biology by trying to recreate aspects of biological phenomena. Overview Artificial life studies the fundamental processes of living systems in artificial environments in order to gain a deeper understanding of the complex information processing that define such systems. These topics are broad, but often include evolutionary dynamics, emergent properties of colle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Norman Packard
Norman Harry Packard (born 1954 in Billings, Montana) is a chaos theory physicist and one of the founders of the Prediction Company and ProtoLife. He is an alumnus of Reed College and the University of California, Santa Cruz. Packard is known for his contributions to chaos theory, complex systems, and artificial life. He coined the phrase "the edge of chaos". Biography Between 1976 and 1981, Packard formed the Dynamical Systems Collective at UC Santa Cruz with fellow physics graduate students, Rob Shaw, Doyne Farmer, and James Crutchfield. The collective was best known for its work in probing chaotic systems for signs of order. Around the same time, he worked with Doyne Farmer and other friends in Santa Cruz, California to form the Eudaemons collective , to develop a strategy for beating the roulette wheel using a toe-operated computer. The computer could, in theory, predict in what area a roulette ball would land on a wheel, giving the player a significant statistical advan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mark Bedau
Mark A. Bedau is an American philosopher who works in the field of artificial life. He is the son of the philosopher Hugo Bedau (1926–2012). Bedau teaches philosophy at Reed College. He is also the co-founder of the European Center for Living Technology (ECLT) and Visiting Professor, Ph.D. Program in Life Sciences: Foundations and Ethics, European School of Molecular Medicine. Bedau is also the editor of the '' Artificial Life Journal''. He has been the COO of Protolife, a biotechnology start-up based in Venice, Italy Venice ( ; it, Venezia ; vec, Venesia or ) is a city in northeastern Italy and the capital of the Veneto region. It is built on a group of 118 small islands that are separated by canals and linked by over 400 bridges. The isl .... Recent books * M. A. Bedau and E. C. Parke, eds. ''The prospect of protocells: social and ethical implications of the recreation of life''. Cambridge: MIT Press. 2009. * Mark A. Bedau, Carol E. Cleland, eds. ' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Artificial Life
Artificial life (often abbreviated ALife or A-Life) is a field of study wherein researchers examine systems related to natural life, its processes, and its evolution, through the use of simulations with computer models, robotics, and biochemistry. The discipline was named by Christopher Langton, an American theoretical biologist, in 1986. In 1987 Langton organized the first conference on the field, in Los Alamos, New Mexico. There are three main kinds of alife, named for their approaches: ''soft'', from software; ''hard'', from hardware; and '' wet'', from biochemistry. Artificial life researchers study traditional biology by trying to recreate aspects of biological phenomena. Overview Artificial life studies the fundamental processes of living systems in artificial environments in order to gain a deeper understanding of the complex information processing that define such systems. These topics are broad, but often include evolutionary dynamics, emergent properties of colle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fitness (biology)
Fitness (often denoted w or ω in population genetics models) is the quantitative representation of individual reproductive success. It is also equal to the average contribution to the gene pool of the next generation, made by the same individuals of the specified genotype or phenotype. Fitness can be defined either with respect to a genotype or to a phenotype in a given environment or time. The fitness of a genotype is manifested through its phenotype, which is also affected by the developmental environment. The fitness of a given phenotype can also be different in different selective environments. With asexual reproduction, it is sufficient to assign fitnesses to genotypes. With sexual reproduction, recombination scrambles alleles into different genotypes every generation; in this case, fitness values can be assigned to alleles by averaging over possible genetic backgrounds. Natural selection tends to make alleles with higher fitness more common over time, resulting in Darwin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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