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821.
822.
Panos Kouvelis Charles L. Munson Shilei Yang 《Production and Operations Management》2013,22(3):535-554
Using predictive global sensitivity analysis, we develop a structural equations model to abstract from the details of a large‐scale mixed integer program (MIP) to capture essential design trade‐offs of global manufacturing and distribution networks. We provide a conceptual framework that describes a firm's network structure along three dimensions: market focus, plant focus, and network dispersion. Normalized dependent variables are specified that act as proxies for a company's placement into our conceptual network classification via the calculation of just a few key independent variables. We provide robust equation sets for eight cost structure clusters. Many different product types could be classified into one of these groups, which would allow managers to use the equations directly without needing to run the MIP for themselves. Our numerical tests suggest that the formulas representing the network structure drivers—economies of scale, complexity costs, transportation costs, and tariffs—may be sufficient for managers to design their strategic network structures, and perhaps more importantly, to monitor them over time to detect potential need for adjustment. 相似文献
823.
This study interrogates ostensible differential deployment of an increasingly ubiquitous tool of policing in Canada – the Taser. Taser-related deaths are problematized as evidence of a teething new urban terrorism essentially against the downtrodden. The paper argues that a combination of intersecting factors: gender, low socio-economic status, mental illness, drug use, and ethnicity are fundamental to who gets tased by the police. The paper investigates the death of Polish immigrant Robert Dziekański at Vancouver airport as a quintessential ‘media event’. It highlights the concomitant disarticulation of the police as repositories of order and their re-articulation as insouciant villains. Dziekański's death, the paper contends, inter alia benefitted from the Canadian ‘cultural feeling rules’ in a manner that earlier recorded Taser-related fatalities did not. In addition, the paper argues that if the current trend continues, not only will the downtrodden continue to bear the brunt of Taser injuries and fatalities, but there may be scant public outcry accompanying such gory incidents. 相似文献
824.
The article focuses on the secondary trauma stressors experienced by those who care for members of the military with special attention to the caregivers of war fighters seeking help from combat stress. Consistent with the theme of the special issue of understanding and preparing for the challenges of combat stress, the authors suggest that military caregiver stress and resilience require attention. The article calls for more attention to this area by researchers, practitioners, and policy makers given the growing combat stress injuries due, in large part, to recent multiple and lengthy deployments. The first section of the article describes secondary traumatic stress (STS) conceptually by identifying and defining STS and related constructs and the relevant theories and the prevalence estimates. The middle section of the article discusses the risk and protective factors for STS. The latter section provides an overview of very underdeveloped literature on military veteran caregivers by first describing this population, the most promising approaches to mitigating and preventing STS, and several model programs that may be useful for units of military caregivers. 相似文献
825.
Jo Anne Sirey Charles P. Hannon Debra D'Angelo Katherine Knies 《Journal of gerontological social work》2013,56(5):382-391
A growing population of older adults receive treatment for depression but remain symptomatic. We report on a feasibility pilot study of an intervention (ACTIVATE) to improve depression care by encouraging the older person to take a step to intensify the existing treatment. Older adults (N = 43) receiving home-meal service and in depression treatment, but still symptomatic, participated in the ACTIVATE intervention. Assessments were conducted to evaluate change in treatment. Many (66.6%) participants took a step to change their treatment; the rate (88.2%) was higher among individuals with major depression. ACTIVATE may be a useful social work intervention to improve depression care. 相似文献
826.
An opportunity to estimate the reliability of survey data on family planning is afforded by a longitudinal study of fertility in metropolitan areas of the United States. A probability sample of mothers was interviewed six months after the birth of their second child. Data were collected on a number of pregnancies, use of contraception, methods used, and the planning status of each pregnancy, in addition to a wide variety of social and psychological characteristics. Three years after the first interview, the same women were interviewed again and identical questions were asked about the same pregnancies. This paper reports an analysis of the consistency of responses in the basic fertility and contraceptive histories. Given the simplicity of the pregnancy histories, the relatively sophisticated sample interviewed, and the intensive preparation of the research, the reliabilities of data on family planning estimated here are assumed to approximate to an upper limit for such data at the present stage of development of survey techniques. Some suggestions for possible future improvement are included. 相似文献
827.
828.
Jacek Kolacz Elizabeth B. daSilva Gregory F. Lewis Bennett I. Bertenthal Stephen W. Porges 《Infancy》2022,27(1):135-158
Caregiver voices may provide cues to mobilize or calm infants. This study examined whether maternal prosody predicted changes in infants’ biobehavioral state after the still face, a stressor in which the mother withdraws and reinstates social engagement. Ninety-four dyads participated in the study (infant age 4–8 months). Infants’ heart rate and respiratory sinus arrhythmia (measuring cardiac vagal tone) were derived from an electrocardiogram (ECG). Infants’ behavioral distress was measured by negative vocalizations, facial expressions, and gaze aversion. Mothers’ vocalizations were measured via a composite of spectral analysis and spectro-temporal modulation using a two-dimensional fast Fourier transformation of the audio spectrogram. High values on the maternal prosody composite were associated with decreases in infants’ heart rate (β = ?.26, 95% CI: [?0.46, ?0.05]) and behavioral distress (β = ?.23, 95% CI: [?0.42, ?0.03]), and increases in cardiac vagal tone in infants whose vagal tone was low during the stressor (1 SD below mean β = .39, 95% CI: [0.06, 0.73]). High infant heart rate predicted increases in the maternal prosody composite (β = .18, 95% CI: [0.03, 0.33]). These results suggest specific vocal acoustic features of speech that are relevant for regulating infants’ biobehavioral state and demonstrate mother–infant bi-directional dynamics. 相似文献
829.
Edward Godfrey Ochieng Andrew David Freeman Price Tarila Zuofa Charles Egbu Ximing Ruan 《生产规划与管理》2016,27(4):237-248
This study sought to examine project delivery challenges currently being faced by energy clients and to determine how they could achieve value creation through better alignment of project delivery processes. There are important lessons to be learned from the energy sector on how to deal with the unique operational and project challenges. Four exploratory focus groups were held with twenty senior project management practitioners, to better understand the greatest needs and project management processes in the energy sector. A formal deductive approach was used to examine and evaluate existing and future energy project delivery processes. From the qualitative data, participants recognised the need to introduce science-based project techniques such as system dynamics and project predictive analytics in project management processes. Participants further noted that comprehensive innovative project delivery processes and analytical approaches are required to cope with the increasing scale and complexity of energy capital projects. 相似文献
830.