The functional capacity of healthcare workers with history of severe acute respiratory distress syndrome (SARS) complicated with avascular necrosis--case report

Two years after the SARS outbreak in Hong Kong, 128 healthcare workers continued to present with musculoskeletal complaints and 38 workers were diagnosed with avascular necrosis (AVN) in different joints. 13 healthcare workers were referred to six designated Physiotherapy Departments of the Hospital Authority for a tailor-made standardized Functional Capacity Evaluation (FCE) from 2004 to 2005 on a voluntary basis. Job analysis, workers' self-perceived disability and functional capacity, non-material handling tests, and the cardiopulmonary fitness test were performed. Retrospective review of the FCE data showed that there were 17 AVN of hips, 16 AVN of knees, 3 AVN of shoulders. All patients had AVN of lower limb joints. Nearly full ranges of movement (ROM) were observed in the knees involved, but the hip range was decreased for most subjects suffering from hip AVNs. Most workers (n=12) could not complete the cardiopulmonary test due to intolerable joint pain. Six workers' self-perceived physical demands level (PDC) matched with the physical demands level identified by the FCE. 12 healthcare workers attained a sedentary physical demands level and were unable to match with their previous job demands. One staff was classified as light physical demands and managed his original duty. Four workers had returned to work at the time FCE was performed. The tailor-made FCE added information to facilitate the return-to-work planning for the staff. Four more workers returned to work with modified duties one year after the FCE.     

Prospects for sustainable development: The significance of population growth

There is nothing static about the notion of optimum population. For any given country, region or the world, the optimum population, or maximum acceptable population, depends on a host of related factors: aspirations of a material kind, the state of the environment, the ability of the economy to provide food, shelter, transport, services, consumer durables and other needs. Many countries, such as the U.K., while today enjoying a reasonable standard of living, may not in fact be living within their carrying capacities. The relation between population and development is a dynamic one. Where the trends established by past and current policies are potentially unsustainable, then there is the risk that population levels may compromise the prospects of maintaining living standards and attaining environmental objectives.This paper draws on the recent world modelGlobEcco, to explore the implications of alternative population growth rates for the future of both the industrialised and developing regions of the world. The model is based on ECCO (Evolution of Capital Creation—previously Carrying Capacity—Options): a new integrative procedure which can test out strategies, technologies and rates of population growth aimed at satisfying both economic and environmental aspirations over the long term.     

Critical success factors in managing modular production design: Six company case studies in Hong Kong, China, and Singapore

Many researchers have explored the advantages of modular product design, its design methods and its effects on product performance. Modular design is, for example, required for product platform, mass customization and postponement in order to achieve greater product variety and differentiation. However, a few empirical studies explicitly examine how to coordinate modular product design in a managerial way. This paper addresses it by conducting multiple case studies with six companies which have successfully adopted modular product design for five years. Seven critical factors are explored in the management of modular product design. These are pre-defined product advantage, selectively used design rules, module definition, system integration, technological newness, internal communication, and supplier and customer involvement. While most of the literature studies the technical dimension of modular design within a firm, this study focuses on the managerial side across the supply chain. It gives new insights on how to manage modular product design and proposes future research opportunities.     

Reducing child poverty by promoting child well-being: Identifying best practices in a time of great need

Child poverty in the United States persists despite a range of social services designed to reduce poverty rates and improve the economic self-sufficiency of families. The economic downturns resulting in job losses and the housing crisis have converged to create a new group of families who were managing to remain out of poverty prior to the recession but are now slipping into poverty, putting additional strain on services. In light of these pressing issues, this article synthesizes the literature examining child poverty to take a long-range view of the relationship between economic strain, system involvement, and impacts on children and the systems attempting to serve these children. The effectiveness of various policy and program efforts aimed at reducing child poverty rates and/or ameliorating the negative effects of living in poverty is reviewed. The article concludes by suggesting a major shift in focus from reducing child poverty as a singular goal to a comprehensive approach to promoting child and family well-being.     

Beyond products: new strategic imperatives for developing competencies in dynamic environments

Strategy research has often taken a product-centered perspective. When firms compete in environments characterized by accelerating product life cycles, mass customization, and technological discontinuities, a product-centered perspective on strategy may help explain a firm’s current competitive advantage. However, this perspective adds little guidance in making strategies that create competitive advantage in the future. In this paper, we present a perspective in which dynamic environments require firms to focus on (1) building market-driven, technological, and integration competencies, not a stream of product improvements, and (2) decoupling these competencies from current products in order to create and exploit new opportunities. We discuss the perspective of products as a temporary integration of market and technology trajectories. Research propositions are presented and future implications are discussed.     

Conceptualizing social-ecological drivers of change in urban forest patches

Urban Ecosystems - We introduce a conceptual model of the urban forest patch as a complex social-ecological system, incorporating cross-scale interactions. We developed this model through an...     

Socioeconomic Risk for Adolescent Cognitive Control and Emerging Risk‐Taking Behaviors

This study examined whether cognitive control mediated the association between socioeconomic status (SES; composite of income‐to‐needs ratio and parent education) and changes in risk‐taking behaviors. The sample included 167 dyads of adolescents (53% male; M_age = 14.07 years at Time 1) and their parents, assessed annually across 4 years. Parents reported socioeconomic variables at Time 1. Adolescents reported risk‐taking behaviors at Times 1 and 4, and completed a functional magnetic resonance imaging cognitive control task at Times 2 and 3. Lower SES was associated with lower behavioral (but not neural) cognitive control, which was associated with increases in risk‐taking behaviors. The findings suggest that elevated socioeconomic risk may compromise cognitive control which can cascade into maladaptive behaviors in adolescence.     

Comparison of Standard Radiological Risk Models and Using RESRAD to Derive Generic Risk-Based Area Factors for Final Status Surveys

The RESidual RADioactivity (RESRAD) computer code has been used for years to calculate carcinogenic risk and radiological dose from exposure to radionuclides. The basic ingestion, inhalation, and direct gamma intake equations used by RESRAD, Risk Assessment Guidance for Superfund (RAGS), and the Soil Screening Guidance for Radionuclides (SSG) are similar and can produce similar results, but there are some notable differences. Of particular interest is the fact that RESRAD incorporates sophisticated environmental transport models. Associated environmental parameters allow risk assessors to consider, among other variables, the size (i.e., surface area) of the contaminated zone, a variable not typically addressed quantitatively under the RAGS/SSG paradigm. Considering the similarities between basic RESRAD, RAGS, and SSG intake equations and given the broad acceptance of RESRAD, it stands to reason that RESRAD-derived area factors may be used to supplement RAGS/SSG human health risk calculations. This would allow risk assessors to retrofit existing results or otherwise modify standard RAGS/SSG equations for use in site closeout planning under the Multi-Agency Radiation Survey and Site Investigation Manual (MARSSIM), given a key component of the MARSSIM method is the consideration of small areas of elevated activity or "hot spots" through the use of area factors.     

PRICING,PRODUCTION, AND PERSISTENCE

Though built with increasingly precise microfoundations, modern optimizing sticky price models have displayed a chronic inability to generate large and persistent real responses to monetary shocks, as recently stressed by Chari, Kehoe, and McGrattan (2000). We trace this lack of persistence to a standard view of the cyclical behavior of real marginal cost built into current sticky price macro models. Using a fully articulated general equilibrium model, we develop an alternative perspective on real marginal cost that leads to substantial persistence. Based on an important role for materials input, variable capacity utilization, and labor adjustment on the extensive margin, this alternative view also makes the sticky price model display volatility and comovement of factor inputs and factor prices more closely in line with conventional wisdom about business cycles and various empirical studies of the dynamic effects of monetary shocks. (JEL: E31 E32)