Web usage mining differs from collaborative filtering in the fact that we are not interested in explicitly discovering user profiles but rather usage profiles. When preprocessing a log file we do not concentrate on efficient identification of unique users but rather try to identify separate user sessions. These sessions are then used to form the so called transactions (see [3]). In the followin...

444 NATURE | VOL 421 | 23 JANUARY 2003 | www.nature.com/nature anti-cancer drugs. Potent cytokines and monoclonal antibodies directed against cell surface-associated structures are already prominent within a radically revised pharmaceutical armamentarium in areas including cancer, autoimmunity, allergy and transplantation. DNA research is therefore crucial to a new generation of immunologists, ...

The latest real-time graphics architectures include programmable floating-point vertex and fragment processors, with support for data-dependent control flow in the vertex processor. We present a programming language and a supporting system that are designed for programming these stream processors. The language follows the philosophy of C, in that it is a hardware-oriented, generalpurpose langua...

This review is a brief outline of the chronology and essence of early events in bioinformatics, covering the period from 1869 (discovery of DNA by Miescher) to 1980-1981 (beginning of massive sequencing). For the purpose of this review, bioinformatics is understood as a chapter of molecular biology dealing with the amino acid and nucleotide sequences and with the information they carry.

In April 19.56 the President’s Commission on Veterans’ Pensions submitted its report, Veterans’ Benejits in the United States: Findings and Recommendations. As part of the Bulletin’s continuing eflort to report developments in the major income-maintenance programs, the folkxving pages present a summary report by the technical adviser to the Commission, taken from the Findings and Recommendation...

Over the following pages, I want to present a sample of ultra-diplomatic transcription Wittgenstein Nachlass. The builds upon diplomatic Nachlass provided by Archives at University Bergen (WAB) which modified using Adobe’s InDesign. contribution renders in pages 154 and 155 Ms-115. It also includes facsimiles two pages.

Receiving thoughtful comments in this symposium from 19 of the discipline's most innovative empirical researchers is gratifying and goes a long way toward bringing issues of replication and data accessibility into public view. The progress made in the preceding pages clearly demonstrates the virtues of a community of scholars willing to share sufficient information to benefit from each other's ...

Wikipedia is a gateway to knowledge. However, the extent to which this gateway ends at Wikipedia or continues via supporting citations is unknown. Wikipedia's gateway functionality has implications for information design and education, notably in medicine. This study aims to establish benchmarks for the relative distribution and referral (click) rate of citations-as indicated by presence of a D...