Our participation in TREC 2003 aims to adapt the use of the DFR (Divergence From Randomness) models with Query Expansion (QE) to the robust track and the topic distillation task of the Web track. We focus on the robust track, where the utilization of QE improves the global performance but hurts the performance on the worst topics. In particular, we study the problem of the selective application...

The vocabulary mismatch problem is one of the important challenges facing traditional keyword-based Information Retrieval Systems. The aim of query expansion (QE) is to reduce this query-document mismatch by adding related or synonymous words or phrases to the query. Several existing query expansion algorithms have proved their merit, but they are not uniformly beneficial for all kinds of queri...

How we learn and refine motor skills in the most effective manner and how we prevent performance breakdown in pressurised or demanding circumstances are among the most important questions within the sport psychology and skill acquisition literature. The quiet eye (QE) has emerged as a characteristic of highly skilled perceptual and motor performance in visually guided motor tasks. Defined as th...

This paper considers the problem of existential quantifier elimination for real algebra (QE). It introduces an algorithmic framework for exploring reformulations of QE problems, with the goal of finding reformulations that make difficult problems tractable for QE implementations, or for which these implementations find simpler solutions. The program qfr is introduced, which implements this appr...

The Drosophila melanogaster RECQ5/QE gene encodes a member of the DNA helicase family comprising the Escherichia coli RecQ protein and products of the human Bloom's, Werner's, and Rothmund-Thomson syndrome genes. The full-length product of RECQ5/QE was expressed in the baculovirus system and was purified. Gel filtration experiments indicated that RECQ5/QE was present in an oligomeric state. The...

The task of finding novel information in information retrieval (IR) has been pro-posed recently and paid more attention to. Compared with techniques in traditional document-level retrieval, query expansion (QE) is dominant in the new task. This paper gives an empirical study on the effectiveness of different QE techniques on finding novel information. The conclusion is drawn according to experi...

The effects of photosystem II antenna size on reaction center-type energy-dependent quenching (qE) were examined in rice plants grown under two different light intensities using both wild type and qE-less (OsPsbS knockout) mutant plants. Reaction center-type qE was detected by measuring non-photochemical quenching at 50 micromol photons m(-2) s(-1) white light intensity. We observed that in low...

This paper proposes an alternative automated mechanism design approach called parametric mechanism design via quantifier elimination (PMD-QE), which utilizes QE, a symbolic formula manipulation technique. In PMD-QE, we start from a skeleton of mechanisms, which is characterized by a set of parameters, e.g., critical values. The range of parameters where the given constraints are satisfied is au...

Helicases are ubiquitous enzymes involved as initiators in almost all aspects of nucleic acid metabolic pathways. The loss of helicase function causes some disorders in organisms. We isolated a new RecQ homologue in Drosophila melanogaster, Recq5/qe. The RECQ5/QE protein has a DNA helicase activity. The C-terminal region of the RECQ5/QE protein interacts with several embryonic proteins, which a...