In recent years, knowledge graphs such as Freebase that capture facts about entities and relationships between them have been used actively for answering factoid questions. In this paper, we explore the problem of automatically generating question answer pairs from a given knowledge graph. The generated question answer (QA) pairs can be used in several downstream applications. For example, they...

Qa-1 is a non-classical Major Histocompatibility (MHC) class I molecule that generally presents hydrophobic peptides including Qdm derived from the leader sequence of classical MHC I molecules for immune surveillance by NK cells. Qa-1 bound peptides derived from the TCR Vβ8.2 of activated T cells also activates CD8+ regulatory T cells to control autoimmunity and maintain self-tolerance. Four al...

BACKGROUND There is a need for dependable quality assessment (QA) of the widely used CoaguChek point-of-care testing prothrombin time monitor. By use of the prescribed set of 5 CoaguChek certified international normalized ratio (INR) QA plasmas, we compared the reliability of the immediate QA of individual monitors described in the European Community-recommended Technology Implementation Plan w...

The surface phenotypes and differentiative history of specific helper-effector (HE) and specific feedback suppression-inducer (FBSI) cell sets were further defined in reference to the Qa-1 and I-J marker systems by culture of selected sets of cortisone-resistant nylon-purified thymocytes with antigen on primed macrophages. The generation of Ly-1:HE and Ly-1:FBSI cell sets required, in each case...

The Tla region located on the murine 17th chromosome controls several serologically defined cell surface antigens. These antigens, referred to as Qa-1-5 and TL, are expressed on a variety of hematopoeitic cell populations. In the present studies we have immunoprecipitated isotopically labeled Qa-2 and H-2 molecules from mitogen-stimulated B6 spleen cells. Sequential immunoprecipitation experime...

This paper presents a question answering (QA) system called Tikka. Tikka’s approach to QA relies heavily on the semantic annotation of text documents and on the usage of answer extraction patterns. In this way, Tikka applies to QA pattern-based techniques traditionally used in named entity recognition and information extraction. In the experiments presented in this paper, Tikka’s performance is...

The information retrieval (IR) community has investigated many different techniques to retrieve passages from large collections of documents for question answering (QA). In this paper, we specifically examine and quantitatively compare the impact of passage retrieval for QA using sliding windows and disjoint windows. We consider two different data sets, the TREC 2002–2003 QA data set, and 93 wh...

Previous works on evaluating the performance of Question Answering (QA) systems are focused on the evaluation of the precision. In this paper, we developed a mathematic procedure in order to explore new evaluation measures in QA systems considering the answer time. Also, we carried out an exercise for the evaluation of QA systems within a time constraint in the CLEF-2006 campaign, using the pro...

OBJECTIVES To investigate the impact of vascular access flow (Qa) on vascular and all-cause mortality in chronic haemodialysis (HD) patients. DESIGN Observational cohort study. SETTING Single centre. PARTICIPANTS Adult chronic HD patients at the HD unit of Shin Kong Wu Ho-Su Memorial Hospital between 1 January 2003 and 31 December 2003 were recruited. Patients were excluded if they had ar...