Young Adolescents' Patterns of Involvement with Siblings and Friends

We identified different patterns in young adolescents' experiences with their siblings and their friends and investigated the connections between these relationship patterns and both young adolescents' psychosocial functioning and the characteristics of their family and neighbourhood contexts. Participants were 141 families, including mothers, fathers, young adolescents (M = 11.4 years), and their younger siblings (M = 8.3 years). Cluster analysis revealed three groups of young adolescents: (1) high intimacy and involvement with sibling, high intimacy with friend but low involvement with friends ('Differentiated'); (2) high intimacy and involvement with friend but not sibling ('Incongruent'); and (3) low involvement and intimacy with both sibling and friend ('Congruent'). The Congruent pattern was associated with young adolescents' personal characteristics and their parent-adolescent relationship experiences. In contrast, the Incongruent and Differentiated profiles were linked to contextual factors (i.e., family and neighbourhood resources). Findings suggest that individual differences exist in the associations between young adolescents' relationships with siblings and friends.     

Parental Emotion Socialization in Adolescence: Differences in Sex, Age and Problem Status

There is a paucity of research on how mothers and fathers socialize emotion in their adolescent sons and daughters. This study was based on 220 adolescents (range 11‐ to 16‐years‐old) who exhibit a range of emotional and behavioral problems and their parents. Parental responses to their children's displays of sadness, anger and fear were assessed. Mothers were found to be more engaged in their children's emotional lives than were fathers. With a few important exceptions (e.g., boys were punished for expressions of anger more than girls), adolescent girls and boys were socialized in much the same way. Parents of older adolescents were generally less supportive and more punitive toward emotional displays. Systematic links between adolescent problem status and parent approaches to emotion socialization were found. These findings on how parents socialize emotions in their adolescents have important implications for theory as well as practice.     

Improving throughput for an electronic assembly line using a constraint analysis methodology

Electronic assembly operations are vital to industries such as telecommunications, computers and consumer electronics. This paper presents a constraint analysis methodology for planning and improving electronic assembly operations that draws on concepts from queueing theory, simulation and production planning. The proposed methodology identifies the operational bottleneck and predicts the utilization, throughput and lead time of the assembly line. It also quantifies the relationship between yields and utilization for the assembly operations. A case study is presented that applies the methodology at an Ericsson, Inc., telecommunications equipment assembly facility. The constraint analysis methodology provided valuable decision support as the managers of Ericsson evaluated the costs and benefits of additional production capacity. Although the focus of this paper is electronic assembly operations, the methodology can be applied to general flow line assembly systems with feedback loops for test and rework under dedicated high-volume production.     

Estimation of Tuberculosis Risk and Incidence under Upper Room Ultraviolet Germicidal Irradiation in a Waiting Room in a Hypothetical Scenario

Environmental control measures (ventilation, high-efficiency particulate air filtration, and upper room ultraviolet germicidal irradiation [UVGI]) are recommended to effectively control tuberculosis (TB) transmission from unsuspected TB patients in high-risk settings, but the effectiveness of their use is not often clear. This study presents a simulation model for a hypothetical hospital waiting room, in which the number of susceptible immunocompetent people in the waiting room follows a Poisson distribution (M = 5) in either low (annual number of TB patients = 5) or high TB risk settings (annual number of TB patients = 50), and used the model to evaluate the reduction of TB transmission risk by upper room UVGI. An exponential dose-response model was used for TB transmission and a two-zone model was used for evaluating the effect of upper room UVGI. Upper room UVGI reduced TB risk by 1.6-fold at 3 microW/cm2 UV irradiance in the upper room in the low TB risk setting and by 4.1-fold at 15 microW/cm2 UV irradiance in the upper room in the high TB risk setting. Use of upper room UVGI also reduced the mean annual new infection rate from 2.2 to 1.3 infections per year at 3 microW/cm2 and to 0.6 infections per year at 15 microW/cm2 in our hypothetical high-risk settings. The effect of upper room UVGI was sensitive to both vertical air velocity (air mixing) and UV irradiance level. Results from partitioning variability indicate that most variability of TB transmission risk came from waiting time in our hypothetical hospital.     

Multi-Systems Life Course: A New Practice Perspective and Its Application in Advanced Practice With Racial and Ethnic Populations

To better respond to social work's directive of increased sensitivity to cultural and ethnic diversity, it is imperative that theory development includes explicit consideration of the complex experiences of racial and ethnic minorities. For a more advanced and culturally relative practice, the authors posit the development of an encompassing perspective referred to as multi-systems life course (MSLC). Using a case example, this article applies a MSLC perspective to practice with women of color experiencing intimate partner violence. Implications for social work practice and an overview on incorporating a MSLC perspective into a graduate social work curriculum are included.     

Comparison of Social Estrangement Among Youth Who Are Accessing Homeless Services in St. Louis,Missouri and Austin,Texas

The purpose of this study was to compare young people seeking homeless services in two distinct geographic locations (Austin, Texas and St. Louis, Missouri). To determine differences between the two populations, the study used a guiding conceptual model of social estrangement that included four domains: institutional disaffiliation, psychological dysfunction, human capital, and identification with homeless culture. A sample of homeless youth (N = 96; 46 from St. Louis, 50 from Austin) were recruited through youth-serving agencies. Findings indicate two unique samples of street-involved youth in regards to affiliation with formal institutions, family support, and informal peer networks, suggesting distinct service needs.     

Modeling Poliovirus Risks and the Legacy of Polio Eradication

This introduction to the special issue on modeling poliovirus risks provides context about historical efforts to manage polioviruses and reviews the insights from models developed to support risk management and policy development. Following an overview of the contents of the special issue, the introduction explores the road ahead and offers perspective on the legacy of polio eradication.     

Characterizing Poliovirus Transmission and Evolution: Insights from Modeling Experiences with Wild and Vaccine‐Related Polioviruses

With national and global health policymakers facing numerous complex decisions related to achieving and maintaining polio eradication, we expanded our previously developed dynamic poliovirus transmission model using information from an expert literature review process and including additional immunity states and the evolution of oral poliovirus vaccine (OPV). The model explicitly considers serotype differences and distinguishes fecal‐oral and oropharyngeal transmission. We evaluated the model by simulating diverse historical experiences with polioviruses, including one country that eliminated wild poliovirus using both OPV and inactivated poliovirus vaccine (IPV) (USA), three importation outbreaks of wild poliovirus (Albania, the Netherlands, Tajikistan), one situation in which no circulating vaccine‐derived polioviruses (cVDPVs) emerge despite annual OPV use and cessation (Cuba), three cVDPV outbreaks (Haiti, Madura Island in Indonesia, northern Nigeria), one area of current endemic circulation of all three serotypes (northern Nigeria), and one area with recent endemic circulation and subsequent elimination of multiple serotypes (northern India). We find that when sufficient information about the conditions exists, the model can reproduce the general behavior of poliovirus transmission and outbreaks while maintaining consistency in the generic model inputs. The assumption of spatially homogeneous mixing remains a significant limitation that affects the performance of the differential equation‐based model when significant heterogeneities in immunity and mixing may exist. Further studies on OPV virus evolution and improved understanding of the mechanisms of mixing and transmission may help to better characterize poliovirus transmission in populations. Broad application of the model promises to offer insights in the context of global and national policy and economic models.     

4 The Physical Environment in Organizations

Abstract

We review empirical research on the physical environment in professional, organizational work settings (i.e., offices, meeting rooms, and design work spaces) from the past several decades. This research reveals no common elements of the physical environment (e.g., enclosures and barriers in work spaces, adjustable work arrangements, personalized work spaces, and ambient surroundings) that are consistently and exclusively associated with desired outcomes in these work settings. Instead, these elements are routinely associated with both desired and undesired outcomes. Based on these findings, we suggest that understanding the role of physical environments in organizations requires an understanding of common trade-offs in organizational life. Further, we suggest that the prevalence of such trade-offs is grounded in tensions that are inherent to the functions that physical environments serve (i.e., aesthetic, instrumental, and symbolic functions). We provide an outline of these tensions and trade-offs in relation to common elements of the physical environment, and suggest that researchers consider these tensions and trade-offs in their future research.