The key idea behind active learning is that a machine learning algorithm can achieve greater accuracy with fewer labeled training instances if it is allowed to choose the training data from which is learns. An active learner ...

Database catalogs often do not contain enough statistical information to correctly cost all possible physi-cal plans. In their absence, the optimizer can produce incorrect estimates and select suboptimal plans for execution. ...

Data centers provide resources for a broad range of services, such as web search, email, web sites, etc, each with different delay requirements. For example, web search should cater to users' requests quickly, while data ...

A computer program which advises students on Computer Sciences courses has been used experimentally at the University of Wisconsin. The program takes into account the background of the student, his interests, his degree ...

We consider the problem of handling aggregate computations in a scalable fashion in stream databases. The queries of interest are sliding-window aggregate queries over a single data stream. In the na�ve approach for this ...

Let G be a univariate Gaussian rational polynomial (a polynomial with Gaussian rational coefficients) having m distinct zeros. Algebraic algorithms are designed and implemented which, given G and a positive rational error ...