Spatial Dispersion as a Dynamic Coordination Problem

Following Schelling (1960), coordination problems have mainly been considered in a context where agents can achieve a common goal (e.g., rendezvous) only by taking common actions. Dynamic versions of this problem have been studied by Crawford and Haller (1990), Ponssard (1994), and Kramarz (1996). This paper considers an alternative dynamic formulation in which the common goal (dispersion) can only be achieved by agents taking distinct actions. The goal of spatial dispersion has been studied in static models of habitat selection, location or congestion games, and network analysis. Our results show how this goal can be achieved gradually, by indistinguishable non-communicating agents, in a dynamic setting.     

Learning Experiences of Older Volunteers in a Community-based Social Program for People with Dementia

Abstract

This qualitative study aimed to explore older adults’ perspectives on volunteering in an activity-based social program for community-dwelling people with dementia called Stepping Stones. Semi-structured interviews were individually conducted with eight older adults who had volunteered in Stepping Stones. Interpretative phenomenological analysis was used to analyze interview data. Four themes related to learning experiences of older volunteers in Stepping Stones emerged. These themes include (a) self-growth and confidence in working with people with dementia; (b) understanding dementia, people with dementia, and needed support for people with dementia and their families; (c) desire not to develop dementia, while recognizing that anything can happen in old age; and (d) exercising person-centered approaches and taking on advocacy roles. Findings suggest that older volunteers gain feelings of personal growth and confidence in working with people with dementia, better understanding, and enhanced attitudes toward people with dementia through volunteering in an activity-based social program for people with dementia. Older adults will be able to fill the needs of community programs for people with dementia, while experiencing benefits from volunteering and learning in later life. Further research is needed to examine to what extent having previous dementia experiences make their experiences and learning different.     

Personal empowerment program: addressing health concerns in people with schizophrenia

Three staff nurses in the Outpatient Schizophrenia Service of the Foothills Medical Centre in Calgary, Alberta, Canada, became concerned about the weight gain of their patients. Patients and their family members were also concerned and asking for help. Before integrating a program to address these concerns, staff first had to demonstrate that a program of this nature would be beneficial for clinic patients. Of the 75 clients screened, many presented with problems in the areas of weight, blood pressure, and fasting blood sugar and lipid levels. Although not a research study, an 8-month pilot project was implemented to address these concerns. It was hypothesized that integrating all dimensions of wellness in patient programming would have a positive effect on various defined indicators (e.g., weight, body mass index, blood pressure, and fasting blood sugar and lipid levels). Screening tests before, during, and after the 8-month project provided the physical outcome measurements. Social and psychological outcomes were described through observation and group member feedback. The positive results are significant in terms of empowering patients in the long-term management of their health.     

Integrating a family-centered approach into social work practice with families of children and adolescents with disabilities

This article identifies a family-centered practice construct for working with children and adolescents with disabilities and their families. The experiences of these families have shifted considerably over the past 30 years. A legislative and historical context provides the basis for an understanding of present policies and practices that influence current approaches to service delivery. Though family-centered practice is emphasized in various practice settings, there is still a need to integrate this philosophy into social work practice with children and adolescents with disabilities and their families. In order to enhance the ability of the social worker to integrate this construct into practice, a framework for exploring the experiences of children, adolescents and families is provided. This framework provides an overview of factors related to the individual child, the family and siblings for the social worker to consider when working with these families. The social worker's role as collaborator, advocate, team member and family resource is highlighted.     

Sexual functioning in women with chronic pelvic pain: the impact of depression, support, and abuse

Many studies have documented associations between sexual functioning, depression, experiences of childhood sexual abuse, relationship support, and chronic pelvic pain, but none have addressed the interrelationships among all of these variables in a unified model. The aim of this preliminary study was to construct an integrative model predicting sexual functioning for women with chronic pelvic pain. Sixty-three women with chronic pelvic pain completed measures of sexual functioning for use as the criterion variable, and measures of the impact of chronic pain, depression, experiences of sexual abuse, and relationship support as predictors. The primary finding was that depression mediated the effects of child sexual abuse and partially mediated the effects of relationship support on sexual behavior and satisfaction with the sexual relationship. In addition to its indirect relationship through depression, relationship support also independently predicted sexual function. Thus, in this nonclinical sample, the effects of child sexual abuse on sexual function depended on the extent of depressive symptoms, while the influence of relationship support depended in part on depression.     

The Unintended Consequences of “Lack of Supervision” Child Neglect Laws: How Developmental Science Can Inform Policies about Childhood Independence and Child Protection

Policies and programs designed to serve children and families are sometimes misaligned with developmental science research. Broad child neglect reporting laws, first adopted by the United States in 1974, have led to families being prosecuted by child protection authorities for allowing children to participate in everyday age-appropriate activities unsupervised. In this report we describe the challenges of defining child neglect and outline the current landscape of neglect laws in the United States. We then provide a broad overview of some of the developmental milestones children need to reach to participate in unsupervised activities and the benefits of independent activities on child development. Children can often accomplish tasks at a much younger age than law, parents, and caregivers in the U.S. believe. We then turn to the literature from across the world and argue that culture, not innate ability, drives much of the variation in the age at which children can do things on their own. Finally, we make recommendations to parents, caregivers, legislators, advocates, and developmental scientists to better align practice with research. This is a social justice issue that should resonate across party, racial, and class lines. Developmental scientists are needed as advocates and advisors on policies impacting children and families, especially child neglect laws.     

Analysis and Management of Periodic Review,Order‐Up‐To Level Inventory Systems with Order Crossover

In this article, we investigate the (R, S) periodic review, order‐up‐to level inventory control system with stochastic demand and variable leadtimes. Variable leadtimes can lead to order crossover, in which some orders arrive out of sequence. Most theoretical studies of order‐up‐to inventory systems under variable leadtimes assume that crossovers do not occur and, in so doing, overestimate the standard deviation of the realized leadtime distribution and prescribe policies that can inflate inventory costs. We develop a new analytic model of the expected costs associated with this system, making use of a novel approximation of the realized (reduced) leadtime standard deviation resulting from order crossovers. Extensive experimentation through simulation shows that our model closely approximates the true expected cost and can be used to find values of R and S that provide an expected cost close to the minimum cost. Taking account of, as opposed to ignoring, crossovers leads, on average, to substantial improvements in accuracy and significant cost reductions. Our results are particularly useful for managers seeking to reduce inventory costs in supply chains with variable leadtimes.     

AN EMPIRICAL EVALUATION OF CONSTANT AND ADAPTIVE COMPUTER FORECASTING MODELS FOR INVENTORY CONTROL

This study compares the performance of one constant model with two adaptive models. MAD and bias were used as criteria for evaluating performance. The results of testing the adaptive models with the constant model were contrary to the expected better performance of the adaptive models; no significant differences were found between the models over known horizontal, trend, and seasonal demand patterns. However, some of the practical advantages of adaptive forecasting models in business suggest their continued use.     

Hidden champions: Exploring supportive family relationships of youth experiencing homelessness

The relationships that youth experiencing homelessness (YEH) have with supportive family members (i.e. those who provide them with social support) may be protective against risk behaviours and buffer adverse health outcomes. However, little is known about the nature of YEH's supportive family relationships and the type of social support that these family relationships offer them. Thus, we conducted in-depth interviews with 30 YEH to examine the type of social support received from family relationships and to explore the social dynamics of these relationships. We found that many YEH not only continued to maintain relationships with family members after becoming homeless but also received emotional and/or instrumental support from these family members. Beyond providing this type of social support, family members served as a source of motivation for these youth. Additionally, YEH contributed to their family relationships and gained a sense of connectedness in return. Lastly, we found that YEH's family support was influenced by their family circumstances and their need for autonomy. Collectively, our findings suggest there may be a need for interventions designed to strengthen relationships with supportive family members among YEH, who may derive multiple positive benefits from relating with the ‘hidden champions’ in their lives.