直线滚动导轨动态特性的试验研究

直线滚动导轨广泛应用于各种数控机床,其动态特性对机床整机的动态特性影响很大,所以导轨动态特性的获取有很重要的意义。设计了可同时对导轨进行法向和切向加载的加载机构,对GGB45BAL型直线滚动导轨进行了不同大小外载荷下的模态试验,获取了该导轨的动态特性及其随外载荷的变化规律,即两阶固有频率都会随着载荷的增加而增大,增幅随载荷方向的变化而变化,导轨两阶阻尼比都会随着载荷的增加而减小,但变化较小。这为机床整机动力学建模提供了依据。     

复合载荷下周向裂纹厚壁圆筒的极限载荷研究

根据Mises 屈服准则在中性轴假设,周向、径向应力常数假设条件下,推导出了含等深周向裂纹厚壁圆筒在受内压、轴向力和弯矩复合载荷下的近似极限载荷公式。对典型参数下理想弹塑性材料模型进行了有限元分析,有限元验证表明文中建立的模型是偏保守的。1.32≤k≤2.00时推荐了计算厚壁圆筒极限载荷的周向、径向应力的取值。     

信息的本质与广义同构原理

传统种加属差的定义模式与人类中心主义的影响以及概念短缺是探索信息本质困难重重的重要原因。信息是用来反映存在的对象性过程性的哲学范畴,是一事物接受其他事物的作用后将某存在态的结构对应于自身的某存在态结构的现象,事物在同构化信号作用序列的作用下如果能够产生对应的与该同构化信号作用序列广义同构的信号反应序列,我们就说该事物获得了蕴涵在同构化信号作用序列里的信息。宇宙是一个整体,宇宙内的各个部分与各种过程与宇宙整体都存在着程度不等的同构性。物质性存在者通过同构促进结构进化、通过结构进化促进信号机制的进化、信号机制的进化又大大促进同构能力的提高、同构能力的提高又会加快结构进化的进度。     

社会工作专业学生认知实习的实践与探索

社会工作认知实习是为专业实习打基础的重要一步。本文从自身的实践经验出发,介绍认知实习的情况和基本做法,反思不足之处,提出设想。     

Development,Implementation, and Outcomes of Post-stroke Mood Assessment Pathways: Implications for Social Workers

Depression and anxiety are prevalent in the stroke population and can have a significant impact on the patient and their family’s long-term outcomes, however the screening for these conditions does not meet best practice recommendations. To address this deficit, this study developed “Post-Stroke Mood Assessment Pathways” and embedded them into practice by utilising the PARiHS framework (for the implementation of evidence-based practice), in conjunction with staff training. The study examined the rates of mood screening, clinical interviews, and completion of interventions for stroke patients through a retrospective chart audit (n?=?213) one year prior to, and one year post-implementation (n?=?238) of the pathways. The data show statistically significant increased documentation around mood screening and clinical interview 95% CI [4.86, 19.88], p?<?.0012 and specifically, an increase in the number of patients who had a clinical interview following the introduction of the pathways 95% CI [8.05, 19.69], p?<?.0001.     

Graffiti

Progress is a term subject to considerable popular appeal, postmodernist criticism, feminist ambivalence, and development debate. In this article, I mark the traces of 'progress' as desires expressed by women working on Zimbabwe's commercial farms and in clothing and food processing factories for what they do not have. The backdrop of the discussion is the historical record concerning women workers in Zimbabwe and representations of 'women' that appear in some of Zimbabwe's contemporary imaginative literatures. The research shows that 'progress' emerges in the factual and fictional accounts of 'women' workers of Zimbabwe as aspirations for altered gender meanings and identity.     

Private democracy: on corporate theories of persuasion in public life

Private corporations have grown rapidly in numbers worldwide and their increasing power and involvement in human life needs to be more fully and critically understood. This ethnographic inquiry draws on studies of very large U.S. corporations, the work of Aristotle, Bacon, Bakhtin, and others to evoke an increasing use of rhetoric and self-consciously designed social organizations developed for profit by the private sector. Companies, it is shown, have historically and now theorize the social order, seek to totalize aspects of it, impose arbitrary orders, critique one another, and influence more effectively subsequent human behavior in the marketplace.     

Implications for Public Policy:

No abstract available for this article.     

Perspectives of Young People in Care About their School-to-Work Transition

Abstract

Achieving in education and employment has long-term effects on quality of life. With below-average levels of educational attainment, many young people in care are ill-equipped for the transition from school to further education and work. This paper presents findings from a qualitative study that explored the school to work transition experiences of young people currently or previously in care, and their ideas about future employment. A range of personal and contextual factors that influence study and work goals were identified. Young people spoke about the importance of personal confidence and determination, supportive relationships, someone to believe in them and encourage them, opportunities to pursue their goals, avenues to gain information about how to get desired jobs, positive school experiences, and the need for stability in their lives. The study suggests widening the agenda for case planning, transition from care and after-care support, to include career planning and vocational assistance.