For example, the syntax rules of the English language tell us that person, tall, told, the, a, me and joke are legal words, and that The tall person told me a joke is a legal sentence, whereas pkrs, shrel and fdadfa are not legal words, and Person tall told a me the is not a legal sentence. The semantic rules tell us what each of the words mean (e.g., what objects the nouns denote and what proc...

Scope and pur~s~computers and operations research admit to a rich and complex interface. Most examples of problem solving in this domain use both computers and operations research as tools to solve problems[I. 21. In particular, the computer is used as a tool in implementing a solution technique arising from an operations research model. A different aspect of this interface is explored here: op...

We propose a visual language, Hyperflow, for system programming as well as for end user shell programming. Hyperflow is designed for a multimedia pen computer system for children. It is a dataflow-based graphical language similar to Show and Tell. In order to demonstrate the capability of Hyperflow, we solve the programming problem of implementing a help command for children to telephone their ...

Barbara Liskov (http://www.pmg.csail.mit.edu/~liskov) is the Ford Professor of Engineering in MIT's http://www.eecs.mit.edu/ Department of Electrical Engineering and Computer Science and head of its Programming Methodology Group. She has led several major projects, including the design and implementation of CLU, the first language to support data abstraction; Argus, the first high-level languag...

Programming languages form the interface between programmers (the users) and the computation that they desire the computer to execute. Although studies exist for some aspects of programming language design (such as conditionals), other aspects have received little or no human factors evaluations. Designers thus have little they can rely on if they want to make new languages highly usable, and u...

A new data acquisition technique allows a microcomputer simultaneously to digitize spikes at high rates, analyze spike waveforms for computer-based spike separation and manage other control tasks. The technique has two key features: a software scheduling routine written in a high-level language and a hardware analog delay of neuronal signals using simple hardware external to the computer. The t...

Programming languages form the interface between programmers (the users) and the computation that they desire the computer to execute. Although studies exist for some aspects of programming language design (such as conditionals), other aspects have received little or no human factors evaluations. Designers thus have little they can rely on if they want to make new languages highly usable, and u...

Programming languages form the interface between programmers (the users) and the computation that they desire the computer to execute. Although studies exist for some aspects of programming language design (such as conditionals), other aspects have received little or no human factors evaluations. Designers thus have little they can rely on if they want to make new languages highly usable, and u...