Colloquium

Theorems, theories, and things: Computing is more than a science

Abstract

As researchers in computing, we claim our field is most definitely a science---and we have the gargoyles to prove it! Yet many of the touchstones of science are conspicuously absent from computing "science", or present only on the periphery. Experiments are rare and empirically-supported quantitative laws still rarer. Such empirical results that we do posess seem far more context-sensitive than the universal laws forming the common currency of physical science.

Towards Internationalization: Computer Science and Technology at Tsinghua University

Abstract

Prof. Xu will tell us about research foci and educational programs at Tsinghua University. Prof. Xu and Prof. Maosong Sun, the Chair of the department, will be attending our CPATH workshop the following weekend. We hope to find areas of research and educational collaboration between our two departments as well as to promote the CPATH Pacific Rim partnerships.

The CS department at Tsinghua is the leading computer science department in China.

CIS Department Photograph

Abstract

The department has had a long standing tradition of having a graduation photo taken midway through spring term. If you have graduated, are planning to graduate this spring, or just planning to walk in this year's ceremony and graduating in the summer or next fall, please join us. This is not a formal occasion, just a relaxed group picture. We will have refreshments at 3:30 pm, with the photo being taken around 3:45 pm. All that participate in the photo will be given a copy at commencement inside your diploma cover.

Certifying Algorithms and the Undergraduate Curriculum

Abstract

A proof of correctness of an algorithm is no guarantee that an implementation of it has no bugs. Software engineers typically try to reduce the probability of bugs through extensive testing, but this does not supply certainty. An alternative is a detailed proof that the implementation is correct, but such a proof, being even more complicated than the program it addresses, can be even more prone to human error.

Adversarial Queuing on Multiple Access Channels

Abstract

Multiple access channels are broadcast networks with instantaneous delivery of transmitted messages to every station and a possibility of conflict for access to the transmitting medium. A message sent to a channel by a station is received successfully by all the stations when the transmission has not overlapped with transmissions by other stations. Multiple overlapping transmissions result in no station receiving any of the transmitted messages.

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