نتایج جستجو برای: hedges
تعداد نتایج: 1394 فیلتر نتایج به سال:
In the hypergraph k-cut problem, the input is a hypergraph, and the goal is to find a smallest subset of hyperedges whose removal ensures that the remaining hypergraph has at least k connected components. This problem is known to be at least as hard as the densest k-subgraph problem when k is part of the input (Chekuri-Li, 2015). We present a randomized polynomial time algorithm to solve the hy...
When a primary study includes several indicators of the same construct, the usual strategy to meta-analytically integrate the multiple effect sizes is to average them within the study. In this paper, the numerical and conceptual differences among three procedures for averaging dependent effect sizes are shown. The procedures are the simple arithmetic mean, the Hedges and Olkin (1985) procedure,...
We use a case study of a pension plan wishing to hedge the longevity risk in its pension liabilities at a future date. The plan has the choice of using either a customised hedge or an index hedge, with the degree of hedge effectiveness being closely related to the correlation between the value of the hedge and the value of the pension liability. The key contribution of this paper is to show how...
One tactful strategy in political rhetoric is hedging which is associated with vagueness and innuendos. Despite the studies that address hedging in academic discourse and conversation analysis, studies that investigate hedges in relation to political power, face, and politeness are tremendously few. To this aim, four political interviews were selected from CNN and BBC websites on the basis of t...
Groves are of ecological importance, but can reduce the productivity of pastures. They may be used by cattle for nutrition as well as for comfort and shelter. To describe the importance and to estimate the influence of cattle on groves, the behavior of cattle around trees and shrubs was observed on six semi-open pastures in the mountain range of Thuringia and the Southern Black Forest (Germany)...
Evidence suggests that immune system alterations in Down syndrome (DS) may be early events that drive neuropathological and cognitive changes of Alzheimer's disease. The primary objective of this meta-analysis was to investigate whether there is an abnormal cytokine profile in DS patients when compared with healthy control (HC) subjects. A systematic search of Pubmed and Web of Science identifi...
The XML community generally takes trees and hedges as the model for XML document instances and element content. In contrast, Berstel and Boasson have discussed XML documents in the framework of extended context-free grammar, modeling XML documents as Dyck strings and schemas as balanced grammars. How can these two models be brought closer together? We examine the close relatioship between Dyck ...
BACKGROUND Acknowledgment of all serious limitations to research evidence is important for patient care and scientific progress. Formal research on how biomedical authors acknowledge limitations is scarce. OBJECTIVES To assess the extent to which limitations are acknowledged in biomedical publications explicitly, and implicitly by investigating the use of phrases that express uncertainty, so-...
OBJECTIVE To assess the effectiveness of substance abuse interventions for their ability to reduce adolescent alcohol use. DATA SOURCES MEDLINE; PsycINFO; ERIC; Wilson Social Science Abstracts; Criminal Justice Abstracts; Social Work Abstracts; Social Science Citation Index; Dissertations Abstracts International; National Criminal Justice Research Service; Social, Psychological, Criminologica...
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