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61.
The numerical control of an experimental assembly cell with two robots--termed a cognitive control unit (CCU)--is able to simulate human information processing at a rule-based level of cognitive control. To enable the CCU to work on a large range of assembly tasks expected of a human operator, the cognitive architecture SOAR is used. The CCU can plan assembly processes autonomously and react to ad-hoc changes in assembly sequences effectively. Extensive simulation studies have shown that cognitive automation based on SOAR is especially suitable for random parts supply, which reduces planning effort in logistics. Conversely, a disproportional increase in processing time was observed for deterministic parts supply, especially for assemblies containing large numbers of identical parts. In this contribution, the effect of phase-shifts in deterministic part supply is investigated for assemblies containing maximal different parts. It can be shown that the concept of cognitive automation is as well suitable for these planning problems. 相似文献
62.
Previous research shows that work ability of nurses decreases with age. In our study we therefore addressed the following questions: Do successful ageing strategies at work in terms of selection, optimization, and compensation (SOC) support the work ability of nurses? Does SOC mediate the relationship between job control (i.e., decision opportunities at work) and work ability? Does the mediation differ between age-groups? 438 nurses (Age Range 21-63 years) completed a questionnaire in the course of an employee survey. Results show that SOC is positively related with work ability. The positive effect of job control on work ability is significantly mediated by SOC. There are stronger mediating effects for elder nurses than for younger nurses. Results indicate that the interplay of job control and SOC at work helps to maintain the work ability of nurses in nursing care. 相似文献
63.
The context of oil platform design is changing in order to increase competitiveness and be prepared for difficult operations, mainly in fields more distant from the coast, like pre-salt. The currently preceding context is marked by projects guidelines designed to reduce projects and operation costs, including an important reducing in the number of people on board. The main objective of this research is to verify and discuss if the experience of use in platforms designed in a previous context, in which the people on board is practically twice, can contribute and/or can be transferred to new projects. From the ergonomic intervention in the design of two oil platform, with the work of team on board investigated on previous projects as reference, it was possible analyze if the previous use is still applicable to new projects. As a result, about 90% of the recommendations based on use are applicable to the current context. The restrictions on the transfer or operational experience are mainly related to the time of entry of ergonomics in the design process, the subsequent transformations costs and the advance of the execution phase started with the detailed design. 相似文献
64.
Ergonomics, usability and user-centered design are terms that are well known among designers. Yet, products often seem to fail to meet the users' needs, resulting in a gap between expected and experienced usability. To understand the possible causes of this gap the actions taken by the designer during the design process are studied in this paper. This can show whether and how certain actions influence the user-friendliness of the design products. The aim of this research was to understand whether ergonomic principles and methods are included in the design process, whether users are involved in this process and whether the experience of the designer (in ergonomics/user involvement) has an effect on the end product usability. In this study the design processes of 151 tangible products of students in design were analyzed. It showed that in 75% of the cases some ergonomic principles were applied. User involvement was performed in only 1/3 of the design cases. Hardly any correlation was found between the designers' experience in ergonomic principles and the way they applied it and no correlations were found between the designers' experience in user involvement and the users' involvement in the design process. 相似文献
65.
66.
Scott Alan Carson 《Journal of population economics》2009,22(3):739-755
The use of height data to measure living standards is now a well-established method in economic history. By using a new source
of nineteenth century Texas state prison records, the present study contrasts the heights of comparable blacks and whites
between the Civil War and Reconstruction in the American South. White stature exceeded black stature. Between 1850 and 1870,
black stature declined by more than 1 cm but recovered toward the end of the nineteenth century. Postbellum white stature
declined by more than 1 1/2 cm over the same period yet never recovered.
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Scott Alan CarsonEmail: |
67.
Previous research suggests that an increasing age at first marriage has contributed to the prevalence of sexual hookups on U.S. college campuses. In this article, we use life course and marital horizons theories to analyze the influence of ideal age at first marriage on hooking up among unmarried heterosexual college students. Analyses of the Online College Social Life Survey (N = 17,981) show a positive association between ideal age at first marriage and hookups for most students, but not for students whose mothers have no post‐secondary education, Asian men, Asian women, and Latina women. Variation in ideal marriage timing does not account for gender, racial/ethnic, and class gaps in hookup participation. Results are discussed with reference to the role of sexuality in processes of stratification throughout young adulthood. 相似文献
68.
Changes in the gender structure: Inequality at the individual,interactional, and macro dimensions
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As a society, we've made tremendous progress toward gender equality over the past several decades. Yet there remains significant inequality between women and men. Furthermore, when we look closely at some of the progress made toward gender equality, we find it considerably less impressive than surface appearances. In this article, we review the updated framework of Risman's (2017) gender structure theory and argue that it can help us make sense of the progress we've made as well as analyzing inequality as it persists between women and men. Using gender structure theory, we then show how gender is simultaneously reproduced and contested across the individual, interactional, and macro levels of society within 3 major social domains: work, family, and gender identity. 相似文献
69.
ABSTRACTDespite the fact that Aboriginal and Torres Strait Islander communities typically experience a high prevalence of sexual and family violence, service responses have mostly been culturally inappropriate and ineffective. This article reports on a collaborative, participatory research project aimed at exploring barriers to service access by Aboriginal and Torres Strait Islander clients when they have been affected by sexual and family violence. The findings reveal multiple barriers to service access, including justice system deterrents, social taboo, shame, and a lack of culturally appropriate services. The article highlights the importance of recognising and addressing the complex interplay of historic, social, and cultural factors influencing service access. 相似文献
70.
Jesse J. Helton Jill C. Schreiber Barbara H. Fiese 《Child and Adolescent Social Work Journal》2017,34(2):159-169
Among their many responsibilities, foster parents are tasked with providing healthy food and proper nutrition to children with a variety of physical, psychological, and emotional needs. Using the lens of symbolic interactionism, this exploratory mixed methods study examined how foster parents attend to the nutritional needs of abused and neglected children. Methods used included both quantitative surveys and qualitative follow-up interviews. Surveys were completed by 23 foster parents in a large, Midwest metropolitan area. Parents reported they provided their children balanced meals, although one-third of households reported instances of food insecurity. During qualitative interviews, foster parents (N = 9) described how children arrived at their home with a variety of unhealthy eating habits, some severe in nature. Parents discussed strategies used to modify and improve eating patterns, including offering healthy food choices, having children plan meals, and gathering as a family for daily dinners. In general, parents understood the link between unhealthy eating and past childhood trauma, but also reported being unprepared for more serious eating problems like hoarding. Findings indicate that foster parents need food assistance to increase food security as well as training in assessing and responding a variety of unhealthy child eating behaviors. 相似文献