Viscous rotary vane actuator/damper

A compact viscous rotary actuator/damper for use on the Mariner '71 and Viking Programs was developed. Several functions were combined into this single mechanism to control the deployment, latching, and damping of the solar panel arrays used on these space vehicles. The design, development, and testing of the actuator/damper are described, and major problems encountered are discussed

Informatics Research Institute (IRIS) June 2001 newsletter

Welcome to the first edition of the Information Systems Institute's Research Newsletter. This Newsletter will be published four times a year (March, June, September and December), and will be published on the ISI research web page. The aim of the Newsletter is to facilitate the exchange of information related to research activities in ISI. Submissions are welcome from staff and research students

On a paper of K. Soundararajan on smooth numbers in arithmetic progressions

In a recent paper, K. Soundararajan showed, roughly speaking, that the integers smaller than x whose prime factors are less than y are asymptotically equidistributed in arithmetic progressions to modulus q, provided that y^{4\sqrt{e}-\delta} \geq q and that y is neither too large nor too small compared with x. We show that these latter restrictions on y are unnecessary, thereby proving a conjecture of Soundararajan. Our argument uses a simple majorant principle for trigonometric sums to handle a saddle point that is close to 1.Comment: 18 page