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Communications of the ACM

Research Archive


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The Research archive provides access to all Research articles published in past issues of Communications of the ACM.

April 2012


From Communications of the ACM

Technical Perspective: Building Robust Dynamical Simulation Systems

Computational power has been widely used to predict the behavior of dynamical systems using computer simulations, which are often used as an adjunct to or substitute for a dynamical system when a simple closed form analytic…


From Communications of the ACM

Asynchronous Contact Mechanics

Asynchronous Contact Mechanics

Physicists have long observed physical phenomena and developed mathematical models to describe them. The advent of computers has allowed us to implement these models as software in a computational environment, launching the…


From Communications of the ACM

Technical Perspective: Who Knows?: Searching for Expertise on the Social Web

It is difficult to remember what people had to do to find the answer to a question before the Web. One option might be to call a friend who might know the answer. This instinct to call someone is baked into the DNA of Aardvark…


From Communications of the ACM

Searching the Village: Models and Methods for Social Search

Searching the Village

With Aardvark, a social search engine, users ask a question, either by IM, e-mail, Web input, text message, or voice. Aardvark then routes the question to the person in the user's extended social network most likely to be able…