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991.
Peter T. Ittig 《决策科学》1994,25(4):541-553
This paper presents a model designed to help determine the number of clerks or servers in a retail queuing situation. The model demonstrates a realistic treatment of the effect of waiting time on customer demand and revenues by treating the average waiting time as a form of price. Thus, the demand rate and service level are interrelated. The number of servers is obtained by balancing the cost of additional servers against the revenues and profits arising from greater demand. An example is shown, using data obtained from a supermarket, to demonstrate the insight gained from applying the model. Some extensions and research possibilities are considered, including a treatment of ancillary activities. An appendix examines a continuous version of the model which provides additional insight into the character of the model. 相似文献
992.
Peter Sidebotham 《Child Abuse Review》2000,9(5):311-320
In order to study patterns of child abuse in a pre‐school population, we have looked at children within a local cohort who have been investigated for abuse or placed on the Child Protection Register. This is part of a larger study examining risk and protective factors for child abuse. Of 14 138 children enrolled in the cohort, 329 were investigated for suspected child abuse and 163 were placed on the Child Protection Register over an 8‐year period, representing rates of 10.6 – 23.3 per 10 000 per year. Physical injury and neglect accounted for 31.7% and 29.0% of registrations in the study group respectively, these proportions being similar to those for children of all ages in Avon. In contrast, sexual abuse accounted for 10.9% compared to 21.1% for all ages. Emotional abuse represented just 2.8% of investigations but 25.1% of all registrations in the study group, compared to 14.4% of registrations for all ages. Two hundred and fifty‐five (1.8%) parents reported physical cruelty to their children by themselves or their partner at some stage in the first 3 years; 772 (5.4%) reported some emotional cruelty. The importance of emotional cruelty to children is increasingly being recognized by professionals, but even more so by parents, whose concerns relating to both physical and emotional cruelty are not being identified by current procedures. Copyright © 2000 John Wiley & Sons, Ltd. 相似文献
993.
994.
Peter Loader 《Child Abuse Review》1998,7(1):44-57
Shame is a powerful emotion associated with the exposure of any aspect of the self that we wish to keep hidden from others. In its healthy manifestation, shame guards the boundary of the self and promotes a realistic self-appraisal of our capacities and our limitations. However, too much shame results in a sense of the self as fundamentally flawed, and can lead to lifelong problems in living. Shame originates in relationship to others, and most notably by how we are seen as children by our parents. This paper focuses on shame in the family context, the ways shame can be misused in the parent/child relationship and the effects of this on the child. Shame is put forward as an important, but neglected, consideration in child mental health and a core issue in child abuse. The implications for work with children and families are briefly discussed. © 1998 John Wiley & Sons, Ltd. 相似文献
995.
996.
We consider the use of smoothing splines for the adaptive modelling of dose–response relationships. A smoothing spline is a nonparametric estimator of a function that is a compromise between the fit to the data and the degree of smoothness and thus provides a flexible way of modelling dose–response data. In conjunction with decision rules for which doses to continue with after an interim analysis, it can be used to give an adaptive way of modelling the relationship between dose and response. We fit smoothing splines using the generalized cross‐validation criterion for deciding on the degree of smoothness and we use estimated bootstrap percentiles of the predicted values for each dose to decide upon which doses to continue with after an interim analysis. We compare this approach with a corresponding adaptive analysis of variance approach based upon new simulations of the scenarios previously used by the PhRMA Working Group on Adaptive Dose‐Ranging Studies. The results obtained for the adaptive modelling of dose–response data using smoothing splines are mostly comparable with those previously obtained by the PhRMA Working Group for the Bayesian Normal Dynamic Linear model (GADA) procedure. These methods may be useful for carrying out adaptations, detecting dose–response relationships and identifying clinically relevant doses. Copyright © 2009 John Wiley & Sons, Ltd. 相似文献
997.
Maria Francesca Cracolici Miranda Cuffaro Peter Nijkamp 《Statistical Methods and Applications》2009,18(2):275-291
Using spatial econometric models, this paper focuses attention on the spatial structure of provincial unemployment disparities
of Italian provinces for the year 2003. On the basis of findings from the economic literature and of the available socio-economic
data, various model specifications including supply- and demand-side variables are tested. Further we use ESDA analysis as
equivalent to integration analysis on time series; therefore it is applied on each variable, dependent and independent, involved
in the statistical model. The suggestions of ESDA lead us to the most adequate statistical model, which estimates indicate
that there is a significant degree of neighbouring effect (i.e. positive spatial correlation) among labour markets at the
provincial level in Italy; this effect is present notwithstanding we controlled for local characteristics. The unemployment
shows a polarized spatial pattern that is strongly connected to labour demand and to a much lesser extent to the share of
young population and economic structural composition. 相似文献
998.
Patricia van Hemert Peter Nijkamp Jolanda Verbraak 《Innovation: The European Journal of Social Science Research》2009,22(4):443-464
Knowledge is gaining increasing importance in modern-day society as a factor of production and, ultimately, growth. This article explores the dynamics in university knowledge production and its effect on the state of university–industry–policy exchange in the Netherlands. Science systems are said to be in transformation. The university has evolved from performing conventional research and educational functions to serving as an innovation-promoting knowledge hub; dynamics that have received mixed reactions. The social sciences and humanities (SSH) take a special position, insofar as their focus seems primarily to be placed on conventional research and educational functions, and not directly on (commercial) valorization. Societal changes are, however, pressing for a reconsideration of the role of SSH. In our article, we distinguish between three important new movements that seem to be affecting SSH. It is believed that these movements, which are already having an impact today, will considerably influence SSH in the future. These developments are further differentiation, synthesis between the various subdisciplines of SSH and the natural sciences, and shifts in paradigms. The aims of this article are twofold: (1) to assess what is believed to be the most likely development of SSH by means of discovering relevant subsets of factors influencing university knowledge production; and (2) to discover whether the knowledge production factors show characteristics of a general development similar to the “Mode 2” concept. A systematic qualitative database was created by means of 22 semi-structured personal interviews with key representatives from business, university and the policy sector. Our explanatory framework employs an artificial intelligence method, i.e. rough set analysis. On the basis of these results, we find that a small minority of the respondents prefers a closer relationship of SSH to society, government and industry, and other institutional centers of authority, whilst interdisciplinarity in particular is regarded as having an overall positive influence on the future of SSH in the Netherlands. Consequently, the idea of a clear distinction between Mode 1 and Mode 2 knowledge production, i.e. traditional knowledge and knowledge carried out in the context of application, is not supported by our data. 相似文献
999.
Peter J. Behrens 《The American Sociologist》2009,40(3):214-227
Modern American culture has seen a proliferation of radio and television personalities associated with talk therapy and advice-giving
within the last 20 years (Epstein Psychology Today 34:5 2001). The origin of radio psychology, however, is the late 1920’s, when radio began to air many promoters of psychology in the
context of “public service” programming. Among these individuals were Louis Monash, Arthur Payne, and, perhaps most importantly,
Joseph Jastrow. Traditionally-trained psychologists used the new medium of radio in the service of education and adjustment.
This article surveys radio psychology, its personalities, and topics in the inter-war period and proposes the significant
social support role that radio psychology played during the Great Depression, much as modern talk radio does today (Ricks
1984). 相似文献
1000.
Andy Ross Ingrid Schoon Peter Martin Amanda Sacker 《Journal of marriage and the family》2009,71(1):1-14
The aim of this paper is to examine variations in the combination of social roles during times of social change. We specify a latent class approach to examine role configurations for individuals in their early 30s, establishing a typology of how work‐ and family‐related roles combine within individuals born 12 years apart and examine their antecedents. Drawing on data collected for two British Birth Cohorts born in 1958 (N = 10,706) and 1970 (N = 11,005), we provide empirical evidence of both consistency and change in life course patterns. Findings are discussed in terms of destandardization, differentiation, and individualization of the life course in times of social change and their implications for family research within a life course perspective. 相似文献