Optimal designs for compartmental models with correlated observations

The flow of internally deposited radioisotope particles inside the body of people exposed to inhalation, ingestion, injection or other ways is usually evaluated using compartmental models (see Sánchez & López-Fidalgo, (2003, and López-Fidalgo & Sánchez, 2005). The International Commission on Radiological Protection (ICRP, 1994) describes the model of the human respiratory tract, represented by two main regions. One of these, the thoracic region (lungs) is divided into different compartments. The retention in the lungs is given by a large combination of ratios of exponential sums depending on time. The aim of this work is to provide optimal times for making bioassays when there has been an accidental radioactivity intake and there is interest in estimating it. In this paper, a large two–parameter model is studied and a simplified model is proposed in order to obtain optimal designs in a more suitable way. Local c-optimal designs for the main parameters are obtained using the results of López-Fidalgo & Rodríguez-Díaz, 2004). Efficiencies for all the computed designs are provided and compared.     

战略竞争力的守成与创新——基于海尔的案例研究

对海尔战略竞争力守成与创新的历史进行纵向的案例研究，回顾海尔在三个不同的战略阶段在三个不同层面上进行的战略竞争力守成与创新的主要内容，深入分析其守成或创新的动机和难题的解决，以及这些守成或创新所产生的战略竞争力给企业带来的结果。     

High School Is Not Too Late: Developing Girls' Interest and Engagement in Engineering Careers

Although experts increasingly call for science, technology, engineering, and math (STEM) education to begin in middle and elementary schools, a 3‐year intervention beginning with high‐achieving female high school sophomores demonstrated that young women can develop a serious interest in engineering in high school. However, subsequent post‐high school study of the participants showed that interest in engineering was not enough for lower‐income minority women to pursue engineering in college. It should be noted that their decision against pursuing engineering in college was not due to their lack of academic preparation or interest in the field, but to a lack of financial resources and social support for engineering, as well as fears of failure. Career counselors and college recruiters have an important role to play in the recruitment and retention of girls of color in engineering and other STEM college majors, including facilitating support and access to appropriate programs and resources at pivotal times.     

‘You're not going anywhere': employee retention,symbolic violence and the structuring of subordination in a UK‐based call centre

This article explores practices that produce and reproduce domination in and through organizational hierarchies and shows how high levels of employee turnover were managed within a UK‐based call centre through the use of culturally bound employment practices. Using ethnographic methods the paper explores the experience of managerial retention strategies from the perspective of employees and draws upon some of the theoretical resources employed by Pierre Bourdieu, specifically in relation to his concern with structures of subordination, and with the ways that processes of symbolic violence appear legitimate. The paper therefore makes three contributions to our understanding of the sociology of work generally and the management of labour turnover in service industries specifically; first, it extends understanding of the cultural basis of retention strategies. Second, it explores the ‘lived experience’ of these strategies. Finally, it considers the relevance of Bourdieu's analysis for making sense of these practices in action.     

Devils and deep blue seas: the social worker in-between

This paper examines the role of the approved social worker, as defined by s.114 of the Mental Health Act 1983, with particular regard to ethical dilemmas in crisis intervention. Issues of management accountability, health and safety are set against the approved social worker's statutory responsibility to assess people experiencing mental health problems and, where necessary, admit to psychiatric hospital under compulsion. Consideration is given to the impact of this work upon the worker, on whom extreme and sometimes conflicting demands are made. An attempt is made to integrate these viewpoints within a fundamentally psychodynamic perspective.     

Work–Family Balance Self‐Efficacy's Relationship With STEM Commitment: Unexpected Gender Moderation

The number of students, particularly the number of women, completing science, technology, engineering, and mathematics (STEM) undergraduate degrees is insufficient to meet the U.S. demand. Thus, research investigating key predictors of STEM commitment is of high importance. Applying the Social Cognitive Model of Career Self‐Management (SCCT‐CSM; Lent & Brown, 2013 ) as a guiding framework, this study examined the relationship between work–family balance self‐efficacy (WFSE) and STEM commitment as moderated by gender. The sample included 246 STEM students (106 women, 140 men) from a southeastern university. A 3‐step hierarchical regression analysis demonstrated that WFSE accounted for incremental variance in STEM commitment beyond traditional social‐cognitive predictors, and gender moderated the relationship between WFSE and STEM commitment. Contrary to expectations, the relationship was stronger for men than for women. Findings suggest resiliency among women, showing that they are committed to STEM regardless of low WFSE. Practical implications for university and workplace contexts are discussed.     

Employment status transitions among young adults,with and without disability

Employment is a crucial avenue through which young people with disability can experience material wellbeing and social participation. While the low employment rates of young people with disability are well established, little is known about the stability of employment status – that is, the degree to which individuals remain in or move in and out of employment. This article uses longitudinal data from a large Australian national data set to investigate the transitions between full‐time, part‐time and non‐employment for young people with and without disability. Considerable mobility was found between employment states for both young people with and without disability, with young people with disability more likely than their peers without disability to transition to reduced levels of employment and less likely to transition to increased levels of employment. Social background and contextual factors predicted employment for young people with disability; however, disability represented an additional penalty even after taking these factors into account. Findings suggest a need for social policy targeted specifically towards the barriers to maintaining and increasing employment experienced by young people with disability.     

Breaking Silence,Building Solutions: The Role of Social Justice Group Work in the Retention of Faculty of Color

In spite of their many diversity initiatives, predominantly White colleges and universities have a poor track record in the recruitment and retention of faculty of color. This article unpacks the White privilege inherent in barriers to retention by focusing on three standards commonly used to make promotion and tenure decisions: teaching, service, and scholarship. A story of two Native American women faculty members denied academic advancement at a predominantly White university 30 years apart illustrates the White racism that underscored these decisions. Approaches to social justice group work are suggested for addressing the retention of faculty of color in the future.     

Stress and Pressures in Mental Health Social Work: The Worker Speaks

Two-thirds of councils with social services responsibilities(CSSRs) took part in a UK survey of mental health social workers.A one in five sample of front line workers was drawn, and 237respondents completed a questionnaire and diary about theirwork context and content, and their attitudes to their work,their employer, mental health policy and the place of mentalhealth social work in modernized mental health services. Thequestions, that called for free-text responses, were completedin detail and at length. This paper reports the results of aqualitative analysis of these responses using NVIVO software.The paper is structured around the themes emerging from theanalysis: pressure of work; staffing matters; job satisfactionand well-being; recruitment and retention issues; and beingvalued. The conclusions are that the social workers value faceto face contact with service users, and that their commitmentto service users is an important factor in staff retention.The most unsatisfactory aspects of their work context arisefrom not feeling valued by their employers and wider society,and some of the most satisfactory from the support of colleaguesand supervisors. Without attention to these factors, recruitmentand retention problems will remain an unresolved issue.     

Multilevel relationships between organizational-level incivility,justice and intention to stay

Abstract

This study extends incivility theory and research by applying multilevel theory and analysis to explain the effect of group-level incivility on intention to remain. Previous research has shown that experiencing workplace incivility is associated with adverse individual well-being and behaviour, such as turnover intentions, but the majority of research has been at the individual level of analysis. Consequently it is unknown whether incivility is also a group-level phenomenon, and what the effects of group-level incivility are on the individual. Results from over 34,000 employees working in 179 organizations across Australia and New Zealand showed that target reports of incivility could be aggregated to the level of the organization to form a shared stressor, incivility environment, which affected employees’ intention to remain over and above their personal experience of incivility. This shared or environmental incivility also had a cross-level interaction effect on the negative relationship between individual incivility and intention to remain, highlighting the importance of context on targets of incivility. The role of interactional justice climate was also examined and the data are consistent with justice having a mediating effect on the cross-level relationship between environmental incivility and intention to remain. The findings are relevant to studies of bullying and harassment.