We re-examine the problem of ranking retrieval systems without relevance assessments in the context of collaborative evaluation forums such as TREC and NTCIR. The problem was first tackled by Soboroff, Nicholas and Cahan in 2001, using data from TRECs 3-8 [16]. Our long-term goal is to semi-automate repeated evaluation of search engines; our short-term goal is to provide NTCIR participants with...

An image-rich interface is presented, which emphasizes visual exploration of sets of images representing shots returned from a query or filter against a digital video corpus. This interface, a storyboard of keyframes for multiple video segments, maintains temporal layout, accommodates contextual cues and filtering, supports additional filtering through visual features, and provides a means of d...

We present a new method for information retrieval using hidden Markov models (HMMs) and relate our experience with this system on the TREC-7 ad hoc task. We develop a general framework for incorporating multiple word generation mechanisms within the same model. We then demonstrate that an extremely simple realization of this model substantially outper-forms tf :idf ranking on both the TREC-6 an...

We present a new method for information retrieval using hidden Markov models HMMs and relate our experience with this system on the TREC ad hoc task We develop a general framework for incorporat ing multiple word generation mechanisms within the same model We then demonstrate that an extremely simple realization of this model substantially outper forms tf idf ranking on both the TREC and TREC a...

The seventh Text REtrieval Conference (TREC-7) was held at the National Institute of Standards and Technology (NIST) on November 9{11, 1998. The conference was co-sponsored by NIST and the Information Technology O ce of the Defense Advanced Research Projects Agency (DARPA) as part of the TIPSTER Text Program. TREC-7 is the latest in a series of workshops designed to foster research in text retr...

BACKGROUND Community-acquired pyogenic liver abscess (PLA) complicated with meningitis and endophthalmitis caused by Klebsiella pneumoniae is an emerging infectious disease. To investigate the mechanisms and effects of biofilm formation of K. pneumoniae causing PLA, microtiter plate assays were used to determine the levels of biofilm formed by K. pneumoniae clinical isolates and to screen for b...

The Text REtrieval Conference (TREC), started in 1992, is a workshop series designed to encourage research on text retrieval for realistic applications by providing large test collections, uniform scoring procedures, and a forum for organizations interested in comparing results. The number of participating systems has grown from 25 in TREC-1 to 66 in TREC-8, including participants from 16 diier...

Although patients treated with HIV protease inhibitor (PI) containing regimens manifest increases in naïve T cell number, it is unclear whether this is due to reduction in viral replication or a direct drug effect. We questioned whether Nelfinavir monotherapy directly impacted naïve T-cell number in HIV-negative individuals. HIV-negative volunteers received Nelfinavir, 1250 mg orally, BID for 3...

BACKGROUND Respiratory syncytial virus (RSV) infection is an important cause of hospitalization in previously healthy infants. Immunological mechanisms predisposing infants to severe disease are poorly understood. Early biomarkers for disease severity may assist clinical decisions. We investigated T-cell receptor excision circles (TREC), episomal DNA made during thymic T-cell receptor rearrange...

Неонатальный скрининг оправдан для редких состояний, которые вызывают серьезные проблемы со здоровьем, не определяются стандартным клиническим обследованием, но имеют методы коррекции, и которых ранняя диагностика лечение важное значение достижения положительного результата. Тяжелые комбинированные иммунодефициты (ТКИД) — группа первичных иммунодефицитов (ПИД), характеризуются выраженной Т- и/и...