Medical research

Toward new alternatives to animal testing

A novel alternative approach that can identify chemicals which affect male reproductive health without the use of animal tests has been developed in a research project led by the Technical University of Denmark.

Neuroscience

Mapping a life's worth of changes in a mysterious brain structure

Until recently, scientists didn't know much about perivascular spaces (PVS), fluid-filled regions in the brain involved in clearing waste and toxins—mainly because it's tough to get a clear look at them using neuroimaging. ...

Diseases, Conditions, Syndromes

Cutting COVID-19 infectious period could prevent millions of cases

A new computational analysis suggests that a vaccine or medication that could shorten the infectious period of COVID-19 may potentially prevent millions of cases and save billions of dollars. The study was led by Bruce Lee ...

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Computer

A computer is a machine that manipulates data according to a set of instructions.

Although mechanical examples of computers have existed through much of recorded human history, the first electronic computers were developed in the mid-20th century (1940–1945). These were the size of a large room, consuming as much power as several hundred modern personal computers (PCs). Modern computers based on integrated circuits are millions to billions of times more capable than the early machines, and occupy a fraction of the space. Simple computers are small enough to fit into a wristwatch, and can be powered by a watch battery. Personal computers in their various forms are icons of the Information Age and are what most people think of as "computers". The embedded computers found in many devices from MP3 players to fighter aircraft and from toys to industrial robots are however the most numerous.

The ability to store and execute lists of instructions called programs makes computers extremely versatile, distinguishing them from calculators. The Church–Turing thesis is a mathematical statement of this versatility: any computer with a certain minimum capability is, in principle, capable of performing the same tasks that any other computer can perform. Therefore computers ranging from a mobile phone to a supercomputer are all able to perform the same computational tasks, given enough time and storage capacity.

This text uses material from Wikipedia, licensed under CC BY-SA