Search Results - subject:"QA"

Kalli, M.; Griffin, J.E.; Walker, S.G. - 2008

We propose a more efficient version of the slice sampler for Dirichlet process mixture models described by Walker (2007). This sampler allows the fitting of infinite mixture models with a wide–range of prior specification. To illustrate this flexiblity we develop a new nonparametric prior for...

Persistent link: https://www.econbiz.de/10009455792

Criteria For Conceptual And Operational Notions of Complexity

Chu, Dominique - 2008

While complex systems have been studied now for more than two decades, there still is no agreement on what complexity actually is. This lack of a definition might be a problem when asking questions about the evolution of complexity. In this article criteria against which candidate measures of...

Persistent link: https://www.econbiz.de/10009455803

Expressions of Expertness: The Virtuous Circle of Natural Language for Access Control Policy Specification

Inglesant, Philip; Sasse, M. Angela; Chadwick, David; … - 2008

The implementation of usable security is particularly challenging in the growing field of Grid computing, where control is decentralised, systems are heterogeneous, and authorization applies across administrative domains. PERMIS, based on the Role-Based Access Control (RBAC) model, provides a...

Persistent link: https://www.econbiz.de/10009455804

M-quantile models with application to poverty mapping

Tzavidis, Nikos; Salvati, Nicola; Pratesi, Monica; … - 2008

Over the last decade there has been growing demand for estimates of population characteristics at small area level. Unfortunately, cost constraints in the design of sample surveys lead to small sample sizes within these areas and as a result direct estimation, using only the survey data, is...

Persistent link: https://www.econbiz.de/10009458654

Essays on moral hazard, reputation and market structure

Toth, Aron - 2008

This thesis is comprised of three pieces of research on moral hazard, reputation and market structure. In particular, following an opening discussion of previous literature, I explore the dynamic interaction between moral hazard and market structure in two distinct game theoretic settings and...

Persistent link: https://www.econbiz.de/10009485153

Terrorism: What the next president will face

Clarke, Richard A. (contributor) - In: The annals of the American Academy of Political and … 618 (2008)

Persistent link: https://www.econbiz.de/10004257787

Ending terrorism : lessons for defeating al-Quaeda

Cronin, Audrey Kurth - 2008

Persistent link: https://www.econbiz.de/10004911880

Knowledge fixation and accretion: longitudinal analysis of a social question-answering site

Matthews, Paul - In: Journal of Documentation 70 (2014) 5, pp. 711-733

-answering (Q&A) site to study how question-answer resources and other community features change over time. Design …/methodology/approach – Statistical analysis and visualisation was performed on the full data dump from the Stack Overflow social Q&A site for programmers … studies have looked at temporal patterns in social Q&A and how time and the moderation and voting systems employed may shape …

Persistent link: https://www.econbiz.de/10014855032

The use of rhetorical strategies in Q&A discussion

Savolainen, Reijo - In: Journal of Documentation 70 (2014) 1, pp. 93-118

Purpose – The major aim of this study is to specify the ways in which rhetorical strategies are employed in Q&A … Youtube videos. Research limitations/implications – The findings are based on the analysis of a Q&A site focusing on a … information if they become aware of the specific ways in which askers and answerers on Q&A sites make use of persuasive …

Persistent link: https://www.econbiz.de/10014855519

Estimation of nonlinear error correction models

Seo, Myung Hwan - 2007

Asymptotic inference in nonlinear vector error correction models (VECM) that exhibit regime-specific short-run dynamics is nonstandard and complicated. This paper contributes the literature in several important ways. First, we establish the consistency of the least squares estimator of the...

Persistent link: https://www.econbiz.de/10009439611