For the problem of processing top-N queries, the threshold algorithm (TA) is an important method in many scenarios. The model of top-N queries with TA has three characteristics: (1) the ranking function is monotone, (2) the query point is fixed, and (3) TA scans the sorted index lists unidirectionally. In many database applications, however, there are opportunities for evaluating top-N queries ...

Available online at www.sciencedirect.com © 2013 The Authors. Published by Elsevier B.V. Selection and peer-review under responsibility of the organizers of the 2013 International Conference on Information Technology and Quantitative Management

Today, producing solutions for the effective and efficient use of energy resources is among priority areas in almost every sector. In terms consumption, each solution developed building sector has a great impact on reducing total consumption. this study, different types insulation materials used walls roof were investigated cost-effectiveness order to improve performance located 1st degree day ...

BACKGROUND Validation of a food frequency questionnaire (FFQ) is important as incorrect information may lead to biased associations. Therefore the relative validity of an FFQ developed for use in the German Health Examination Survey for Adults 2008-2011 (DEGS) was examined. METHODS Cross-sectional comparisons of food consumption data from the FFQ and from two 24-hour recalls were made in a sa...

Output growth in the U.S., a commodity-importing country, increases its demand for imports of commodities and therefore commodity prices, which benefits commodityexporting countries but has adverse effects on commodity-importing countries. Hence, in the data, U.S. output is more positively correlated with outputs of commodity-exporting countries than commodity-importing countries. In other word...