Psychology & Psychiatry

Explore or exploit: How our brains make choices

People make countless choices every day. It may be a difficult, complex choice—whether to take the job in a new city or stay in a current position—or be as simple as choosing between visiting a new restaurant or going ...

Biomedical technology

Want to 3D print a kidney? Start by thinking small

Human organ transplants offer a crucial lifeline to people with serious illnesses, but there are too few organs to go around: in the U.S. alone, there are more than 112,000 people currently waiting for transplants. The promise ...

Alzheimer's disease & dementia

New computational model proposed for Alzheimer's disease

Mayo Clinic researchers have proposed a new model for mapping the symptoms of Alzheimer's disease to brain anatomy. This model was developed by applying machine learning to patient brain imaging data. It uses the entire function ...

Obstetrics & gynaecology

Male contraceptive pill found 99% effective in mice

A team of scientists said Wednesday they had developed a male oral contraceptive that was 99 percent effective in mice and didn't cause observable side effects, with the drug expected to enter human trials by the end of this ...

Psychology & Psychiatry

Why young children are hyper-optimistic

While people tend to have an optimism bias at any age, the Journal of Experimental Psychology: General study reports that this is particularly true among children, and declines as they grow up into adolescence. As they grow ...

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Computer simulation

A computer simulation, a computer model or a computational model is a computer program, or network of computers, that attempts to simulate an abstract model of a particular system. Computer simulations have become a useful part of mathematical modeling of many natural systems in physics (computational physics), chemistry and biology, human systems in economics, psychology, and social science and in the process of engineering new technology, to gain insight into the operation of those systems, or to observe their behavior.

Computer simulations vary from computer programs that run a few minutes, to network-based groups of computers running for hours, to ongoing simulations that run for days. The scale of events being simulated by computer simulations has far exceeded anything possible (or perhaps even imaginable) using the traditional paper-and-pencil mathematical modeling: over 10 years ago, a desert-battle simulation, of one force invading another, involved the modeling of 66,239 tanks, trucks and other vehicles on simulated terrain around Kuwait, using multiple supercomputers in the DoD High Performance Computer Modernization Program; a 1-billion-atom model of material deformation (2002); a 2.64-million-atom model of the complex maker of protein in all organisms, a ribosome, in 2005; and the Blue Brain project at EPFL (Switzerland), began in May 2005, to create the first computer simulation of the entire human brain, right down to the molecular level.

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