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751.
Conclusion The political environment faced by U.S. unions has changed substantially over the past decade. The cost of election campaigns
has increased dramatically and many interest groups have become actively involved in election financing. More importantly,
the election of a Republican majority to Congress in 1994 caused a major change in the nature of unions' interactions with
Washington legislators. Organized labor has faced a barrage of bills aimed at reducing the power of unions and minimizing
their political involvement. Such efforts have also occurred across the country as conservative groups have attempted to qualify
referenda that limit unions in some way. At a time when unions must organize new workers to survive as a viable force in society,
these political challenges are especially serious matters. 相似文献
752.
This article describes a Delphi‐based expert judgment study aimed at the selection of indicators to identify the occurrence of emerging mycotoxin hazards related to Fusarium spp. in wheat supply chains. A panel of 29 experts from 12 European countries followed a holistic approach to evaluate the most important indicators for different chain stages (growth, transport and storage, and processing) and their relative importance. After three e‐mailing rounds, the experts reached consensus on the most important indicators for each of the three stages: wheat growth, transport and storage, and processing. For wheat growth, these indicators include: relative humidity/rainfall, crop rotation, temperature, tillage practice, water activity of the kernels, and crop variety/cultivar. For the transport and storage stage, they include water activity in the kernels, relative humidity, ventilation, temperature, storage capacity, and logistics. For wheat processing, indicators include quality data, fraction of the cereal used, water activity in the kernels, quality management and traceability systems, and carryover of contamination. The indicators selected in this study can be used in an identification system for the occurrence of emerging mycotoxin hazards in wheat supply chains. Such a system can be used by risk managers within governmental (related) organizations and/or the food and feed industry in order to react proactively to the occurrence of these emerging mycotoxins. 相似文献
753.
754.
Michael Preston‐Shoot 《Social Work Education》2013,32(8):811-812
Social work students' responses to research tend to reflect their anxiety about the acquisition of competency in statistics and research methods. Their desires to attain social work education and subsequently become practitioners are viewed by them as at odds with research as taught. Yet, within the current quantocentric culture—which the authors define as one in which quantitative research methods are privileged over other lines of inquiry—social work education is increasingly emphasizing research as a central component of practice. Using a ‘culture as disability’ framework to understand quantocentric culture and its impact on the educational environment, we suggest an educational approach designed to interest students in a broad view of research allowing for the wholehearted inclusion of non‐quantitative and practice‐related facets of research. The approach encourages students to: (a) fully articulate their perceptions of research, both positive and negative; (b) link these views and experiences to the anti‐oppressive social work literature and to examine research methods from the perspective of quantocentrism; and (c) develop an inclusive typology of research that integrates qualitative approaches encompassing historical, philosophical, narrative and other avenues that are relevant to their future social work practice careers. 相似文献
755.
Paul W. Stewart 《统计学通讯:理论与方法》2013,42(12):3975-3993
When presented as graphical illustrations, regression surface confidence bands for linear statistical models quickly convey detailed information about analysis results. A taut confidence band is a compact set of curves which are estimation candidates for the unobservable, fixed regression curve. The bounds of the band are usually plotted with the estimated regression curve and may be overlaid by a scatter-plot of the data to provide an integrated visual impression. Finite-interval confidence bands offer the advantages of clearer interpretation and improved efficiency and avoid visual ambiguities inherent to infinite-interval bands. The definitive characteristic of a finite-interval confidence band is that it is only necessary to plot it over a finite interval in order to visually communicate all its information. In contrast, visual representations of infinite-interval bands are not fully informative and can be misleading. When an infinite-interval band is plotted, and therefore truncated, substantial information given by its asymptotic behavior is lost. Many curves that are clearly within the plotted portion of the infinite interval confidence band eventually cross a boundary. In practice, a finite-interval band can always be easily obtained from any infinite-interval band. This article focuses on interpretational considerations of symmetric confidence bands as graphical devices. 相似文献
756.
Michael Greenberg Paul Lioy Birnur Ozbas Nancy Mantell Sastry Isukapalli Michael Lahr Tayfur Altiok Joseph Bober Clifton Lacy Karen Lowrie Henry Mayer Jennifer Rovito 《Risk analysis》2013,33(11):1969-1986
We built three simulation models that can assist rail transit planners and operators to evaluate high and low probability rail‐centered hazard events that could lead to serious consequences for rail‐centered networks and their surrounding regions. Our key objective is to provide these models to users who, through planning with these models, can prevent events or more effectively react to them. The first of the three models is an industrial systems simulation tool that closely replicates rail passenger traffic flows between New York Penn Station and Trenton, New Jersey. Second, we built and used a line source plume model to trace chemical plumes released by a slow‐moving freight train that could impact rail passengers, as well as people in surrounding areas. Third, we crafted an economic simulation model that estimates the regional economic consequences of a variety of rail‐related hazard events through the year 2020. Each model can work independently of the others. However, used together they help provide a coherent story about what could happen and set the stage for planning that should make rail‐centered transport systems more resistant and resilient to hazard events. We highlight the limitations and opportunities presented by using these models individually or in sequence. 相似文献
757.
In this study, the relationships among boredom proneness, job boredom, and counterproductive work behaviour (CWB) were examined. Boredom proneness consists of several factors, which include external stimulation and internal stimulation. Given the strong relationships between both the external stimulation factor of boredom proneness (BP-ext) and anger as well as the strong relationship between trait anger and CWB, we hypothesized that examining BP-ext would help us to better understand why employees commit CWB. Five types of CWB have previously been described: abuse against others, production deviance, sabotage, withdrawal and theft. To those we added a sixth, horseplay. Using responses received from 211 participants who were recruited by email from throughout North America (112 of them matched with co-workers), we found support for our central premise. Indeed, both BP-ext and job boredom showed significant relationships with various types of CWB. The boredom proneness factor also moderated the relationship between job boredom and some types of CWB, suggesting that a better understanding of boredom is imperative for designing interventions to prevent CWB. 相似文献
758.
Little is known about the perceived health risks of electromagnetic fields (EMFs) and factors associated with risk perception in non‐Western countries. Psychological conditions and risk perception have been postulated as factors that facilitate the attribution of health complaints to environmental factors. This study investigated people's perceived risks of EMFs and other environmental sources, as well as the relationships between risk perception, psychopathology, and the degree of self‐reported sensitivity to EMFs. A total of 1,251 adults selected from a nationwide telephone interviewing system database responded to a telephone survey about the relationships between environmental sources and human health. The interview included questions assessing participants’ psychiatric conditions and the presence and degree of sensitivity to EMFs. One hundred and seventy participants were self‐identified as having sensitivity to EMFs, and 141 met the criteria for psychiatric conditions without EMF sensitivity. More than half of the survey respondents considered power lines and mobile phone base stations to affect people's health to a big extent. Higher sensitivity to EMFs, psychopathology, being female, being married, more years of education, and having a catastrophic illness had positive associations with perceived risks of EMF‐related environmental sources as well as for all environmental sources combined. We observed no moderating effect of psychopathology on the association between degree of sensitivity to EMF and risk perception. Thus, psychopathology had influence on general people's risk perception without having influence on the relationship between people's degree of sensitivity to EMF and risk perception. The plausible explanations are discussed in the text. 相似文献
759.
Roxana Gutirrez‐Romero 《Development policy review : the journal of the Overseas Development Institute》2013,31(3):291-320
This article assesses the key factors that influenced the intention to vote in the 2007 presidential election in Kenya, using data from a survey and other external datasets. Ethnicity was found to be one of the main factors. However, access to private and public goods, poverty and differences in wealth across ethnic groups also mattered, depending on how the voter claimed to be self‐identified. Those who self‐identified in terms of their ethnicity were influenced the most by access to services such as schools, health clinics and police stations, evidence suggesting that voters use ethnicity as a proxy to gauge which candidates will give them greater access to services provided by the state. 相似文献
760.
Kate Godfrey Paul Rhodes Caroline Hunt 《Australian and New Zealand Journal of Family Therapy》2013,34(1):54-74
During childhood and adolescence, family meal frequency has been found to have an inverse relationship with disordered eating behaviour. Also, family interactional patterns differ in families where there is a child with and without an eating disorder. This paper examines the relationship between family mealtime interactions during childhood and adolescence and eating disorder behaviour through a systematic review of the literature. The method was an asystematic electronic search of PsycInfo, Medline and Web of Knowledge undertaken in April 2012. Ten studies demonstrated a significant relationship between family mealtime interactions and disordered eating behaviour. Families where there is a child with an eating disorder display less positive interactions during mealtimes. While the findings can be linked to family based treatment for anorexia nervosa there is a need for prospective research in this area. 相似文献