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131.
Roberto Rossi S. Armagan Tarim Brahim Hnich Steven Prestwich Semra Karacaer 《Journal of Combinatorial Optimization》2010,19(3):325-346
The problem of finding the optimal timing of audit activities within an organisation has been addressed by many researchers.
We propose a stochastic programming formulation with Mixed Integer Linear Programming (MILP) and Constraint Programming (CP)
certainty-equivalent models. In experiments neither approach dominates the other. However, the CP approach is orders of magnitude
faster for large audit times, and almost as fast as the MILP approach for small audit times. This work generalises a previous
approach by relaxing the assumption of instantaneous audits, and by prohibiting concurrent auditing. 相似文献
132.
dos Santos Priscila Silva de Lima Araújo Elcida de Andrade Juliana Ramos da Silva Kleber Andrade dos Santos Danielle Melo dos Santos Josiene Maria Falcão Fraga dos Prazeres Gicélia Lira Ferraz Elba Maria Nogueira 《Urban Ecosystems》2020,23(4):865-874
Urban Ecosystems - The soil use in surroundings of forest remnants, as well as, variations in seasonality and rainfall totals from each year might influence the composition, structure, and... 相似文献
133.
Dora L. Costa 《Demography》2012,49(4):1185-1206
Debilitating events could leave either more frail or more robust survivors, depending on the extent of scarring and mortality selection. The majority of empirical analyses find more frail survivors. I find heterogeneous effects. Among severely stressed former Union Army prisoners of war (POWs), the effect that dominates 35?years after the end of the Civil War depends on age at imprisonment. Among survivors to 1900, those younger than 30 at imprisonment faced higher old-age mortality and morbidity and worse socioeconomic outcomes than non-POW and other POW controls, whereas those older than 30 at imprisonment faced a lower older-age death risk than the controls. 相似文献
134.
The scale-up method estimates the size of hard to count subpopulations. This method is based on the idea that the proportion of subjects in a subpopulation E known to each member of the general population T is the same as the proportion of members of E belonging to general population T. 相似文献
135.
Attitudes toward the use of nuclear energy pose fundamental issues in the political debate about how to meet future energy needs. Development of new nuclear power facilities faces significant opposition both from knowledgeable individuals who display an understanding of the risks attached to various forms of power generation and those who follow strict politically based ideological dogmas. This article employs data from a 2005 Eurobarometer survey of UK citizens to examine the influence of both political preferences and knowledge in explaining support of nuclear power. Findings reveal that attitudes about nuclear power are highly politically motivated while the influence of knowledge about radioactive waste is dependent upon beliefs about the consequences of nuclear energy use. Perceptions of being informed about radioactive waste and trust in sources providing information about radioactive waste management also predict attitudes toward nuclear power generation. 相似文献
136.
Mayrink Vinícius Diniz Panaro Renato Valladares Costa Marcelo Azevedo 《AStA Advances in Statistical Analysis》2021,105(2):353-383
AStA Advances in Statistical Analysis - This study proposes a Bayesian structural equation model (SEM) to explore financial and economic sustainability indicators, considered by the Brazilian... 相似文献
137.
Roberto Baiocco Jessica Pistella Marco Salvati Salvatore Ioverno Fabio Lucidi 《Journal of homosexuality》2020,67(4):489-512
ABSTRACTThis study describes the process of developing and validating the Sexual Prejudice in Sport Scale (SPSS), which is a multidimensional instrument developed to assess attitudes toward lesbians and gay men (LG) in sports. The authors conducted two studies: first, to establish the factor structure of the SPSS on 297 heterosexual athletes; and, second, to test the reliability and validity of the resulting 19-item scale on a sample of 311 heterosexual and 160 LG athletes. Exploratory factor analysis of an initial item pool yielded three factors: open rejection, which assesses the blatant prejudice expressed toward LG people; denial of visibility, which evaluates attitude toward the coming out of LG people; and gendering performance, which corresponds to gender stereotypes about performance/skills of LG people. A confirmatory factor analysis was conducted to assess the stability of the SPSS. The authors documented internal consistency, test-retest stability, and convergent/divergent validity. Implications and directions for future research are discussed. 相似文献
138.
Francisco Cribari-Neto Maria da Glória A. Lima 《Journal of statistical planning and inference》2011,141(11):3617-3627
The linear regression model is commonly used by practitioners to model the relationship between the variable of interest and a set of explanatory variables. The assumption that all error variances are the same (homoskedasticity) is oftentimes violated. Consistent regression standard errors can be computed using the heteroskedasticity-consistent covariance matrix estimator proposed by White (1980). Such standard errors, however, typically display nonnegligible systematic errors in finite samples, especially under leveraged data. Cribari-Neto et al. (2000) improved upon the White estimator by defining a sequence of bias-adjusted estimators with increasing accuracy. In this paper, we improve upon their main result by defining an alternative sequence of adjusted estimators whose biases vanish at a much faster rate. Hypothesis testing inference is also addressed. An empirical illustration is presented. 相似文献
139.
Marcin Goda Marta Pachocka Karolina Podgrska 《International migration (Geneva, Switzerland)》2021,59(1):241-262
Migrant integration is usually studied in four dimensions: economic, political, social and cultural. The cultural sphere seems to be the most ambiguous, but also the one that induces various interpretations as it touches upon core norms and values held both by migrants and by the receiving society. This paper aims to reconstruct research approaches to cultural integration and integration policy. Beside the receiving country’s language, that is the obvious differentiating factor of cultural integration, other aspects have been defined: migrants’ religion, knowledge of the receiving country’s symbolic culture, maintenance and transmission of cultural patterns, cultural identity. Furthermore, indicators which appear to adequately measure the effectiveness of integration activities have been assigned to the predefined aspects of cultural integration. They have been confronted with indicators used within integration policies of selected EU states and with expert statements (collected within the Delphi method‐based survey) on given aspects of policies aimed at cultural integration. 相似文献
140.
This study compares input control based on aggregate shop loads with that based on bottleneck resource loads. Two appropriate release mechanisms are developed and compared in flow and job shops that have various levels of a bottleneck constraint. Simulation results show that both the level of bottleneck and the flow pattern influence the effectiveness of the strategies. Release based on aggregate loads works well when shop loads are balanced or when there is a bottleneck but the flow is highly structured, as in a flow shop. Release based on bottleneck loads works best when flow patterns are less structured, as in a job shop. 相似文献