Users with different amount of domain or topic knowledge tend to find different results, when searching on the same topic. We were interested in finding out how domain or topic knowledge is associated with users’ querying behaviors, which would result in different results. In this study, thirty-five students participated in a user experiment, conducted searches from genomics data set that was u...

Hematopoietic stem cell transplantation (HSCT) is followed by profound immunodeficiency. Thymic function is necessary for de novo generation of T cells after HSCT. Circulating CD45RA(+) naive T-cell levels are predictive of antigen-specific T-cell responses in the absence of graft-versus-host disease (GVHD). These T cells may not represent recent thymic emigrants, since naive T cells may mainta...

A Grid Information Retrieval (GIR) simulation was used to process the TREC Million Query Track queries. The GOV2 collection was partitioned by hostname and the aggregate performance of each host, as measured by qrel counts from the past TREC Terabyte Tracks, was used to rank the hosts in order of quality. Only the 100 highest quality hosts were included in the Grid IR simulation, representing l...

The present methodology for evaluating complex questions at TREC analyzes answers in terms of facts called “nuggets”. The official F-score metric represents the harmonic mean between recall and precision at the nugget level. There is an implicit assumption that some facts are more important than others, which is implemented in a binary split between “vital” and “okay” nuggets. This distinction ...

In this work, we propose a Passage-Based Language Modeling (LM) approach for Opinion Finding in Blogs. Our decision to use Language Modeling in this work is totally based on the importance of passages in blogposts and performance LM has given in various Opinion Detection approaches. In addition to this, we propose a novel method for bi-dimensional Query Expansion with relevant and opinionated t...

Xu Chang1,2,3, Liying Jiao1,2,3, Jinlong Liu1,2,3, Weijian Zhu,1,2,3, Yuanhai Xue1,2 ,Li Zha1,2, Yue Liu1,2 , Xueqi Cheng4 1) Institute of Computing Technology, Chinese Academy of Sciences, Beijing, 100190 2) Key Laboratory of Web Data Science and Technology, CAS 3) University of Chinese Academy of Sciences, Beijing, 100190 4) Institute of Network Technology,ICT(YANTAI),CAS {changxu, jiaoliying...

Recent efforts made by the MIR community is pushing for the creation of a standardised framework for MIR system evaluation. Such a framework will allow the community to collaborate on important issues and ultimately progress this dynamic area of research further. Some of these efforts are asking if a framework similar to TREC is the way forward. In this paper we report the methodology and resul...

The quantitative contribution of the thymus to the maintenance of peripheral populations of naive T cells is poorly understood. Several new lines of evidence indicate that thymic activity continues into adulthood, albeit at lower levels than in early life, and that this is important for a range of lymphopenic disorders. A measure of thymic activity that is often used is the quantification of T-...

CL Research's question-answering system (DIMAP-QA) for TREC-10 only slightly extends its semantic relation triple (logical form) technology in which documents are fully parsed and databases built around discourse entities. Time constraints did not allow us to make various changes planned from TREC-9. TREC-10 changes made fuller use of the integrated machine-readable lexical resources and extend...