CS Unplugged is a collection of free learning activities that teach Computer Science through engaging games and puzzles that use cards, string, crayons and lots of running around.
Computer Physics Communications publishes research papers and application software in the broad field of computational physics; current areas of particular interest are reflected by the research interests and expertise of the CPC Editorial Board The focus is on contemporary computational methods and techniques and their implementation, the effectiveness of which will normally be demonstrated by the author(s) in the context of a substantive problem in physics.
Computers have been used to coordinate information between multiple locations since the 1950s. The U.S. military’s SAGE system was the first large-scale example of such a system, which led to a number of special-purpose commercial systems such as Sabre 72 In the 1970s, computer engineers at research institutions throughout the United States began to link their computers together using telecommunications technology. The effort was funded by ARPA (now DARPA ), and the computer network that resulted was called the ARPANET 73 The technologies that made the Arpanet possible spread and evolved.
While it is possible to write computer programs as long lists of numbers ( machine language ) and while this technique was used with many early computers, 67 it is extremely tedious and potentially error-prone to do so in practice, especially for complicated programs. Instead, each basic instruction can be given a short name that is indicative of its function and easy to remember – a mnemonic such as ADD, SUB, MULT or JUMP. These mnemonics are collectively known as a computer’s assembly language Converting programs written in assembly language into something the computer can actually understand (machine language) is usually done by a computer program called an assembler.
Every atom has electrons orbiting around it, but usually, those electrons stay confined to tight orbits. In a Rydberg state, the electrons swing wider and wider, farther and farther away from the core of the atoms — until they cross paths with the other atoms in the computer simulation. All these wildly excited atoms suddenly find themselves sharing the same space, and — just like in the Maryland machine — interact with one another as quantum magnets that the researchers can observe.