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Resource Constraints (resource + constraint)
Selected AbstractsEfficient packet scheduling for heterogeneous multimedia provisioning over broadband satellite networks: An adaptive multidimensional QoS-based designINTERNATIONAL JOURNAL OF SATELLITE COMMUNICATIONS AND NETWORKING, Issue 1 2009Hongfei Du Abstract With their inherent broadcast capabilities and reliable extensive geographical coverage, the broadband satellite networks are emerging as a promising approach for the delivery of multimedia services in 3G and beyond systems. Given the limited capacity of the satellite component, to meet the diverse quality of service (QoS) demands of multimedia applications, it is highly desired that the available resources can be adaptively utilized in an optimized way. In this paper, we draw our attention on the development and evaluation of an efficient packet scheduling scheme in a representative broadband satellite system, namely satellite digital multimedia broadcasting (SDMB), which is positioned as one of the most attractive solutions in the convergence of a closer integration with the terrestrial mobile networks for a cost-effective delivery of point-to-multipoint services. By taking into account essential aspects of a successful QoS provisioning while preserving the system power/resource constraints, the proposed adaptive multidimensional QoS-based (AMQ) packet scheduling scheme in this paper aims to effectively satisfy diverse QoS requirements and adaptively optimize the resource utilization for the satellite multimedia broadcasting. The proposed scheme is formulated via an adaptive service prioritization algorithm and an adaptive resource allocation algorithm. By taking into account essential performance criteria, the former is capable of prioritizing contending flows based on the QoS preferences and performance dynamics, while the latter allocates the resources, in an adaptive manner, according to the current QoS satisfaction degree of each session. Simulation results show that the AMQ scheme achieves significantly better performance than those of existing schemes on multiple performance metrics, e.g. delay, throughput, channel utilization and fairness. Copyright © 2008 John Wiley & Sons, Ltd. [source] Cost-constrained G -efficient Response Surface Designs for Cuboidal RegionsQUALITY AND RELIABILITY ENGINEERING INTERNATIONAL, Issue 2 2006Youjin Park Abstract In many industrial experiments there are restrictions on the resource (or cost) required for performing the runs in a response surface design. This will require practitioners to choose some subset of the candidate set of experimental runs. The appropriate selection of design points under resource constraints is an important aspect of multi-factor experimentation. A well-planned experiment should consist of factor-level combinations selected such that the resulting design will have desirable statistical properties but the resource constraints should not be violated or the experimental cost should be minimized. The resulting designs are referred to as cost-efficient designs. We use a genetic algorithm for constructing cost-constrained G -efficient second-order response surface designs over cuboidal regions when an experimental cost at a certain factor level is high and a resource constraint exists. Consideration of practical resource (or cost) restrictions and different cost structures will provide valuable information for planning effective and economical experiments when optimizing statistical design properties. Copyright © 2005 John Wiley & Sons, Ltd. [source] Robust Resource Allocation Decisions in Resource-Constrained Projects,DECISION SCIENCES, Issue 1 2007Filip Deblaere ABSTRACT The well-known deterministic resource-constrained project scheduling problem involves the determination of a predictive schedule (baseline schedule or pre-schedule) of the project activities that satisfies the finish,start precedence relations and the renewable resource constraints under the objective of minimizing the project duration. This baseline schedule serves as a baseline for the execution of the project. During execution, however, the project can be subject to several types of disruptions that may disturb the baseline schedule. Management must then rely on a reactive scheduling procedure for revising or reoptimizing the baseline schedule. The objective of our research is to develop procedures for allocating resources to the activities of a given baseline schedule in order to maximize its stability in the presence of activity duration variability. We propose three integer programming,based heuristics and one constructive procedure for resource allocation. We derive lower bounds for schedule stability and report on computational results obtained on a set of benchmark problems. [source] Smoking Stage of Change and Interest in an Emergency Department,based InterventionACADEMIC EMERGENCY MEDICINE, Issue 3 2005Edwin D. Boudreaux PhD Abstract Objectives: To examine factors associated with motivation to quit smoking and interest in an emergency department (ED)-based intervention. Methods: Consecutive ED patients 18 years of age and older were interviewed. Severely ill and cognitively disabled patients were excluded. Smoking history, stage of change, self-efficacy, presence of a smoking-related illness, interest in an ED-based smoking intervention, and screening/counseling by the patient's ED provider were assessed. Results: A total of 1,461 of 2,314 patients (64%) were interviewed. A total of 581 (40%) currently smoked, with 21% in precontemplation (no intention to quit), 43% in contemplation (intention to quit but not within the next 30 days), and 36% in preparation (intention to quit within the next 30 days). Approximately 50% indicated a willingness to remain 15 extra minutes in the ED to receive counseling. Only 8% received counseling by their ED provider. A regression analysis showed that greater readiness to change was associated with multiple lifetime quit attempts, presence of a quit attempt in the past 30 days, and higher self-efficacy. Interest in an ED-based intervention was more likely among patients who reported higher self-efficacy. Conclusions: Approximately 50% of smokers reported at least moderate interest in an ED-based intervention and a willingness to stay 15 extra minutes, but only 8% reported receiving counseling during their ED visit. Considering time and resource constraints, counseling/referral may be best suited for patients characterized by a strong desire to quit, multiple previous quit attempts, high self-efficacy, a smoking-related ED visit, and strong interest in ED-based counseling. [source] Assessing yield and yield stability of remnant populations of Cenchrus ciliaris L. in arid Tunisia: developing a blueprint for initiating native seed productionGRASS & FORAGE SCIENCE, Issue 3 2008M. Visser Abstract Native seed needs to be sourced locally yet contain ample genetic variation. A blueprint is developed for assembling and assessing native plant material at one eco-geographical site prior to seed multiplication for restoring degraded drylands of North Africa. To satisfy the ,local yet ample' criterion, the feasibility of selecting a limited number of high-yielding genotypes within one starter collection of Cenchrus ciliaris L. in Presaharian Tunisia (100,200 mm annual rainfall) was tested and compared to outcomes with similar work on its ecological complement, Stipa lagascae R. & Sch. Results showed that a limited number of high-yielding genotypes can easily produce quality native seed because of the high genetic diversity of the starter material. Results also showed that there was a high potential to increase the rain-use efficiency of degraded drylands using this seed. Seven ground rules are suggested when building the starter collection: (i) carefully delimit the region for sourcing seed; (ii) work with individual plants; (iii) carefully choose the collection site; (iv) replicate plant material as much as is feasible; (v) match evaluation methods to resource constraints; (vi) wait for conditions of maximum resource availability before culling; and (vii) apply a two-tiered selection strategy. [source] Older patients and delayed discharge from hospitalHEALTH & SOCIAL CARE IN THE COMMUNITY, Issue 6 2000Christina R. Victor BA M Phil PhD Hon MFPHM Abstract Older people (those aged 65 years and over) are the major users of health care services, especially acute hospital beds. Since the creation of the NHS there has been concern that older people inappropriately occupy acute hospital beds when their needs would be best served by other forms of care. Many factors have been associated with delayed discharge (age, sex, multiple pathology, dependency and administrative inefficiencies). However, many of these factors are interrelated (or confounded) and few studies have taken this into account. Using data from a large study of assessment of older patients upon discharge from hospital in England, this paper examines the extent of delayed discharge, and analyses the factors associated with such delays using a conceptual model of individual and organisational factors. Specifically, this paper evaluates the relative contribution of the following factors to the delayed discharge of older people from hospital: predisposing factors (such as age), enabling factors (availability of a family carer), vulnerability factors (dependency and multiple pathology), and organisational/administrative factors (referral for services, type of team undertaking assessments). The study was a retrospective patient case note review in three hospitals in England and included four hundred and fifty-six patients aged 75 years and over admitted from their own homes, and discharged from specialist elderly care wards. Of the 456 patients in the sample, 27% had a recorded delay in their discharge from hospital of three plus days. Multivariate statistical analysis revealed that three factors independently predicted delay in discharge: absence of a family carer, entry to a nursing/residential home, and discharge assessment team staffing. Delayed discharge was not related to the hypothesised vulnerability factors (multiple dependency and multiple pathology) nor to predisposing factors (such as age or whether the older person lived alone). The delayed discharge of older people from hospital is a topic of considerable policy relevance. Our study indicated that delay was independently related to two organisational issues. First, entry into long-term care entailed lengthy assessment procedures, uncertainty over who pays for this care, and waiting lists. Second, the nature of the team assessing people for discharge was associated with delay (the nurse-coordinated team made the fewest referrals for multidisciplinary assessments and had the longest delays). Additionally, the absence of a family carer was implicated in delay, which underlines the importance of family and friends in providing posthospital care and in maintaining older people in the community. Our study suggests that considerable delay in discharging older people from hospital originates from administrative/organisational issues; these were compounded by social services resource constraints. There is still much to be done therefore to improve coordination of care in order to provide a truly ,seamless service'. [source] Whither trial-based economic evaluation for health care decision making?HEALTH ECONOMICS, Issue 7 2006Mark J. Sculpher Abstract The randomised controlled trial (RCT) has developed a central role in applied cost-effectiveness studies in health care as the vehicle for analysis. This paper considers the role of trial-based economic evaluation in this era of explicit decision making. It is argued that any framework for economic analysis can only be judged insofar as it can inform two key decisions and be consistent with the objectives of a health care system subject to its resource constraints. The two decisions are, firstly, whether to adopt a health technology given existing evidence and, secondly, an assessment of whether more evidence is required to support this decision in the future. It is argued that a framework of economic analysis is needed which can estimate costs and effects, based on all the available evidence, relating to the full range of possible alternative interventions and clinical strategies, over an appropriate time horizon and for specific patient groups. It must also enable the accumulated evidence to be synthesised in an explicit and transparent way in order to fully represent the decision uncertainty. These requirements suggest that, in most circumstances, the use of a single RCT as a vehicle for economic analysis will be an inadequate and partial basis for decision making. It is argued that RCT evidence, with or without economic content, should be viewed as simply one of the sources of evidence, which must be placed in a broader framework of evidence synthesis and decision analysis. Copyright © 2006 John Wiley & Sons, Ltd. [source] Different ties for different needs: Recruitment practices of entrepreneurial firms at different developmental phasesHUMAN RESOURCE MANAGEMENT, Issue 4 2003Aegean Leung Entrepreneurial firms face significant challenges in attracting and acquiring needed human resources. That is, in addition to difficulties associated with resource constraints and organization legitimacy, the requirements for "person-organization fit" change substantially as these firms transit from start-up to growth phase. This study examines how entrepreneurial firms tap evolving social network ties in order to address "needs-and-fits" issues across different developmental stages of the firm. The findings go beyond what "strength of weak ties" and "structural hole" theories would suggest, and highlight the persistent use of strong and direct ties across developmental phases. © 2004 Wiley Periodicals, Inc. [source] Power aware scalable multicast routing protocol for MANETsINTERNATIONAL JOURNAL OF COMMUNICATION SYSTEMS, Issue 10 2006R. Manoharan Abstract Multicasting is an effective way to provide group communication. In mobile ad hoc networks (MANETs), multicasting can support a wide variety of applications that are characterized by a close degree of collaboration. Since MANETs exhibit severe resource constraints such as battery power, limited bandwidth, dynamic network topology and lack of centralized administration, multicasting in MANETs become complex. The existing multicast routing protocols concentrate more on quality of service parameters like end-to-end delay, jitter, bandwidth and power. They do not stress on the scalability factor of the multicast. In this paper, we address the problem of multicast scalability and propose an efficient scalable multicast routing protocol called ,Power Aware Scalable Multicast Routing Protocol (PASMRP)' for MANETs. PASMRP uses the concept of class of service with three priority levels and local re-routing to provide scalability. The protocol also ensures fair utilization of the resources among the nodes through re-routing and hence the lifetime of the network is increased. The protocol has been simulated and the results show that PASMRP has better scalability and enhanced lifetime than the existing multicast routing protocols. Copyright © 2005 John Wiley & Sons, Ltd. [source] Towards a debugging system for sensor networksINTERNATIONAL JOURNAL OF NETWORK MANAGEMENT, Issue 4 2005Nithya Ramanathan Due to their resource constraints and tight physical coupling, sensor networks afford limited visibility into an application's behavior. As a result it is often difficult to debug issues that arise during development and deployment. Existing techniques for fault management focus on fault tolerance or detection; before we can detect anomalous behavior in sensor networks, we need first to identify what simple metrics can be used to infer system health and correct behavior. We propose metrics and events that enable system health inferences, and present a preliminary design of Sympathy, a debugging tool for pre- and post-deployment sensor networks. Sympathy will contain mechanisms for collecting system performance metrics with minimal memory overhead; mechanisms for recognizing application-defined events based on these metrics; and a system for collecting events in their spatiotemporal context. The Sympathy system will help programmers draw correlations between seemingly unrelated, distributed events, and produce graphs that highlight those correlations. As an example, we describe how we used a preliminary version of Sympathy to help debug a complex application, Tiny Diffusion.,Copyright © 2005 John Wiley & Sons, Ltd. [source] Treatment of osteoporosis: facing the challenges in the Asia-PacificINTERNATIONAL JOURNAL OF RHEUMATIC DISEASES, Issue 4 2008Syed Atiqul HAQ Abstract The prevalence of osteoporosis and fractures is projected to increase rapidly in the Asia-Pacific region in coming decades. At the societal level, healthcare providers will face the challenges of paucity of information, lack of awareness among physicians, resource constraints, lack of organization, absence of policies of cost reimbursement, insufficient representation of the problem in curricula and lack of effective, inexpensive and convenient therapy. Poverty, illiteracy, lack of awareness and interest in future quality of life, and co-morbidities with seemingly greater importance, will all act as challenges at the level of individual patients. Lack of compliance is a function of lack of awareness and motivation, cost, complexity of administration, side-effects and absence of immediately perceivable benefit. The challenges may be overcome through systematic collection of data, formation or activation of national osteoporosis planning and coordinating groups, development of national guidelines, programs of education of healthcare providers, patients and the general public, adoption of a population-based prevention strategy, cost-effective opportunistic screening using clinical decision rules like the osteoporosis self-assessment tool for Asians, use of the fracture risk assessment tool for therapeutic decision-making, giving due emphasis to the problem in curricula and development of mechanisms for cost reimbursement. The Asia-Pacific League of Associations for Rheumatology may take a lead in stimulating, organizing and coordinating these activities. [source] Marketing information systems in tourism and hospitality small- and medium-sized enterprises: a study of Internet use for market intelligenceINTERNATIONAL JOURNAL OF TOURISM RESEARCH, Issue 4 2001Emma Wood Abstract This study investigates the nature of marketing information systems (MkIS) within small- and medium-sized enterprises (SMEs) and focuses on the importance of external information and market intelligence. The sources of market intelligence are investigated with particular emphasis on understanding the usefulness of the Internet for external information gathering. The empirical research to support the study uses survey methods to investigate marketing information systems, market intelligence and Internet use within hospitality and tourism SMEs in the Yorkshire and Humber region. The findings indicate that SMEs in this sector make use of informal marketing information systems which mainly concentrate on internal and immediate operating environment data. Important wider market intelligence is underutilised owing mainly to the resource constraints of these smaller businesses. The Internet has not yet been recognised as an important source for market intelligence despite having the benefits of providing much of the necessary data more quickly and at a lower cost than many other sources. Copyright © 2001 John Wiley & Sons, Ltd. [source] Ageing and the changing role of the family and the community: An African perspectiveINTERNATIONAL SOCIAL SECURITY REVIEW, Issue 1 2002Nana Araba Apt Global ageing, the major social issue of the twenty-first century, will have greater social repercussions for developing countries. The fastest increase of older persons in terms of ratio in relation to younger people is happening in developing countries, and in Africa segregation of older people in rural areas will become manifest. While beneficial changes for women have accompanied modernization in many of the developing countries, the situation of older women appears to be particularly precarious. Social changes brought about by modernization are also profoundly affecting the traditional systems of care for older people. Even though most older people requiring care are still looked after within the informal structures of the family, this can no longer be taken for granted as we move into the new century. This paper critically reviews social protection systems and the resource constraints which characterize developing countries and warns against blind development of social security systems based on those of the industrialized countries. The paper argues for the design of intergenerational support back into mainstream social relations so that older persons are not marginalized and put at risk through social protection programmes which reinforce physical vulnerability stereotypes and stress welfare needs over and above older people's social and economic contributions to society [source] Understanding families in their own context: schizophrenia and structural family therapy in BeijingJOURNAL OF FAMILY THERAPY, Issue 3 2002Lawrence Hsin Yang Evidence from a number of family intervention strategies demonstrates a beneficial impact on the course of schizophrenia. It appears that different family interventions have generic features that aid the patient to avoid relapse and improve functioning. A significant challenge for researchers is to modify these generic strategies to be sensitive to different cultural groups in order to ensure their effectiveness. Chinese culture, with its distinct cultural norms governing family interaction and intense stigma towards the mentally ill, would seem to raise a particular challenge. This paper offers an account of an eclectic model of structural family therapy that incorporates psychoeducation and behavioural treatments for schizophrenia as a theoretical guide to working in a cross,cultural context. A Beijing family, consisting of parents and their daughter with schizophrenia, were seen for sixteen months during a trial of family intervention in China. Through structural family concepts, China's sociocultural context of treatment resource constraints, population policy and stigma are examined and the impact of the illness on family organization is explored. [source] The State as Parent: The Reluctant Parent?JOURNAL OF LAW AND SOCIETY, Issue 1 2008The Problems of Parents of Last Resort This paper will explore the idea of the local authority as a reluctant parent. It will consider the extent to which this reluctance is produced by the care proceedings system and its consequences for children. Local authorities are both expected to refrain from intervening (care proceedings are a measure of last resort) and to be fully prepared for intervention (whilst leaving children with their parents). Amongst the themes which will be developed here are the impact of the juridification of social work and the emphasis on the courts for holding local authorities to account; the balance between voluntary accommodation and compulsory care; and the problems of resourcing care services. Its main focus will be on children who enter care because of abuse or neglect. Its thesis is that the conflicting expectations on local authorities, resource constraints, and considerations of legal process make them reluctant parents. [source] Attitudes and practices of general practitioners in the diagnosis and management of attention-deficit/hyperactivity disorderJOURNAL OF PAEDIATRICS AND CHILD HEALTH, Issue 5 2002KA Shaw Objective: To assess understanding of, and actual and potential roles in management of attention-deficit/hyperactivity disorder (ADHD) among GPs. Methods: A cross-sectional questionnaire survey of Queensland GPs selected randomly from the Royal Australian College of General Practitioners directory of members was carried out. Main outcome measures were knowledge levels of ADHD, current management practices, referral patterns and self-perceived information and training needs. Results: Three hundred and ninety-nine GPs returned a completed questionnaire (response rate 76%). Roles identified by GPs were: the provisional diagnosis of ADHD and referral to specialist services for confirmation of the diagnosis and initiation of management; assistance with monitoring progress once a management plan was in place; education of the child and their family regarding the disorder; and liaison with the school where necessary. Perceived barriers to increased involvement of GPs were: time and resource constraints of general practice; concerns regarding abuse and addiction liability of prescription stimulants; complex diagnostic issues associated with childhood behavioural problems; and lack of training and education regarding ADHD. Conclusions: General practitioners identify a role for themselves in ADHD care that is largely supportive in nature and involves close liaison with specialist services. [source] Knowledge Combination and Knowledge Creation in a Foreign-Market NetworkJOURNAL OF SMALL BUSINESS MANAGEMENT, Issue 2 2009Daniel Tolstoy This article rests on the idea that knowledge is dispersed among different individuals and entities. For international entrepreneurial firms to create new knowledge, they need to find ways to combine these dispersed bits of knowledge. Because of the notion that resource constraints make international entrepreneurial firms dependent on external knowledge, it is assumed that a portion of knowledge combination takes place in networks. The purpose of this article was to investigate the prospective impact network knowledge and knowledge combinations have on entrepreneurial firms' knowledge creation. Three hypotheses are developed and tested in a structural equation model, using linear structural relations (LISREL, Scientific Software International, Inc.). [source] Does the Colour of the Cat Matter?MANAGEMENT AND ORGANIZATION REVIEW, Issue 1 2007The Red Hat Strategy in China's Private Enterprises abstract The proliferation of new property rights regimes in transitional economies provided an opportunity to examine the interaction between institutions and organizations. Some private enterprises in China developed the Red Hat strategy whereby they disguised their private ownership by registering as a public-owned organization. Drawing on a national survey, this study investigated how institutional variations, transaction costs and social embeddedness affected the firms' Red Hat strategy. The findings suggest that private firms preferred a fuzzy property rights arrangement in the early years of market transition. The temporal and regional variation of the institutional environment contributed to the adoption of the Red Hat strategy. High transaction costs , networking cost and resource constraints , were positively related to the adoption of the Red Hat strategy. Social embeddedness also played an important role. The reliance on transaction partners in the public sector increased the pressure to adopt the Red Hat, while connections with high-ranking cadres facilitated the process. However, private firms opted for clearly delineated property rights as the institutional environment improved. In turn, the decisions of individual firms affected the institutional environment at the aggregate level. The Red Hat strategy exemplifies the co-evolution of institutional change and organizational dynamics. [source] Adoption of sustainable agriculture practices: Evidence from a semi-arid region of EthiopiaNATURAL RESOURCES FORUM, Issue 3 2009Menale Kassie Abstract In the wake of the resource constraints for external farm inputs faced by farmers in developing countries, sustainable agriculture practices that rely on renewable local or farm resources present desirable options for enhancing agriculture productivity. In this study, plot-level data from the semi-arid region of Ethiopia, Tigray are used to investigate the factors influencing farmers' decisions to adopt agriculture practices, with a particular focus on conservation tillage, compost and chemical fertilizer. A trivariate probit model is used to analyze the determinants of adoption of these practices. In addition, stochastic dominance analysis is used to compare the productivity impacts of compost with that of chemical fertilizer based on a six-year cross-sectional farm-level dataset. Our results indicate heterogeneity with regard to the factors that influence adoption decisions of the three practices and the importance of both plot and household characteristics on influencing adoption decisions. In particular, we found that household endowments and access to information, among other factors, impact the choice of sustainable farming practices significantly. Furthermore, the use of stochastic dominance analysis supported the contention that sustainable farming practices enhance productivity. They even proved to be superior to the use of chemical fertilizers , justifying the need to investigate factors that influence adoption of these practices and to use this knowledge to formulate policies that encourage adoption. [source] Rice versus fish revisited: On the integrated management of floodplain resources in BangladeshNATURAL RESOURCES FORUM, Issue 2 2004Bhavani Shankar Abstract Disproportionately little attention has been paid to the dry season trade-off between rice and (inland capture) fish production on the floodplains of Bangladesh, compared to the same trade-off during the flood season. As the rural economy grows increasingly dominated by dry-season irrigated rice production, and floodplain land and water come under ever-increasing pressure during the dry winter months, there is an urgent need to focus attention on these dry months that are so critical to the survival and propagation of the floodplain resident fish, and to the poor people that depend on these fish for their livelihood. This article examines three important dry-season natural resource constraints to floodplain livelihoods in Bangladesh, and finds a common factor at the heart of all three: rice cultivation on lands at low and very low elevations. The article articulates the system interlinkages that bind these constraints and the long-run trend towards irrigated rice cropping on lower-lying lands, and suggests a management approach based on locally tailored strategies to arrest this trend. Apart from its direct relevance to the floodplains of Bangladesh, which support more than 100 million people, these lessons have relevance for river floodplain systems elsewhere in the developing world, notably the Mekong Delta. [source] Caring holistically within new managerialismNURSING INQUIRY, Issue 1 2004Woon Hau Wong This article explains the attempts of nurses to practice humanistic, holistic care in line with their professionalizing strategy. Ideally, the intention of nurses is to broaden their concerns beyond the physiological needs of patients, thereby circumventing biomedical control over their work. However, the author argues that resource constraints, and the coalescing of biomedical and managerial definitions of patients, suggest that holistic notions of care are subjected to a new form of calculus and normalizing technology. Critically, nurses are more preoccupied with the day-to-day struggle to free up resources for healthcare, in particular bed spaces, and to pre-empt the problem of bed blocking. Such work suggests that the ,emptying of beds' is not just a symbol of accomplishment for nursing work. From the governmentality theory of Foucault, the administration of ,beds' has become part of the managerial power/knowledge discourse and an instrument for making nurses toe the financial bottom-line. [source] Voters, Parties, and the Endogenous Size of GovernmentAMERICAN JOURNAL OF ECONOMICS AND SOCIOLOGY, Issue 1 2002Jans-Peter Olters Elections, often to a considerable degree, influence the fiscal policies of governments installed on the basis of their results. Yet, economists have tended to view politicians' behaviour either as being determined exogenously or as the result of a social planner's maximisation of a well-defined social-welfare function (subject to some appropriate technology and resource constraints). The latter approach, given (i) its inherent abstraction from important politico-economic interactions, (ii) the theoretical difficulty in deriving a non-contradictory "collective utility function" (as demonstrated by Arrow), and (iii) the inability to estimate a stable relationship that could explain political preferences with economic variables,is viewed as being an unsatisfactory tool for the joint description of a country's economy and polity. On the basis of explicit micro-economic foundations and a democratically coordinated decision-making mechanism over the "optimal" provision of public goods and the corresponding taxes required to finance them, this paper will introduce a simple economic model of politics that subjects individuals to a,two-tiered,political decision-making process over party membership and electoral participation, thereby endogenising the evolution of the competing parties' ideologies, households' electoral behaviour, and the key factors explaining the design of fiscal policies. Having the majority party's median delegate determine on the "optimal" degree of income redistribution suggests that a country's wealth distribution is a crucial explanatory variable explaining its politico-economic development path. [source] Use of O*NET as a job exposure matrix: A literature reviewAMERICAN JOURNAL OF INDUSTRIAL MEDICINE, Issue 9 2010Manuel Cifuentes MD Abstract Background O*NET is a publicly available online database that describes occupational features across US job titles and that has been used to estimate workplace physical and psychosocial exposures and organizational characteristics. The aim of this review is to describe and evaluate the use of O*NET as a job exposure matrix. Methods A review of the peer-reviewed published and gray literature was conducted. Twenty-eight studies were found that used O*NET to estimate work exposures related to health or safety outcomes. Each was systematically evaluated across eight main features. Results Many health outcomes have been studied with O*NET estimates of job exposures. Some studies did not use conceptual definitions of exposure; few studies estimated convergent validity, most used predictive validity. Multilevel analysis was underutilized. Conclusion O*NET is worthy of exploration by the occupational health community, although its scientific value is still undetermined. More studies could eventually provide evidence of convergent validity. O*NET has the potential to allow examination of occupational risks that might have otherwise been ignored due to missing data or resource constraints on field data collection of job exposure information. Am. J. Ind. Med. 53:898,914, 2010. © 2010 Wiley-Liss, Inc. [source] Cost-constrained G -efficient Response Surface Designs for Cuboidal RegionsQUALITY AND RELIABILITY ENGINEERING INTERNATIONAL, Issue 2 2006Youjin Park Abstract In many industrial experiments there are restrictions on the resource (or cost) required for performing the runs in a response surface design. This will require practitioners to choose some subset of the candidate set of experimental runs. The appropriate selection of design points under resource constraints is an important aspect of multi-factor experimentation. A well-planned experiment should consist of factor-level combinations selected such that the resulting design will have desirable statistical properties but the resource constraints should not be violated or the experimental cost should be minimized. The resulting designs are referred to as cost-efficient designs. We use a genetic algorithm for constructing cost-constrained G -efficient second-order response surface designs over cuboidal regions when an experimental cost at a certain factor level is high and a resource constraint exists. Consideration of practical resource (or cost) restrictions and different cost structures will provide valuable information for planning effective and economical experiments when optimizing statistical design properties. Copyright © 2005 John Wiley & Sons, Ltd. [source] Surgical workforce in New Zealand: characteristics, activities and limitationsANZ JOURNAL OF SURGERY, Issue 4 2009Antony Raymont Planning the future surgical workforce is a vitally important activity in which the Royal Australasian College of Surgeons is actively engaged. This paper reports on a survey, undertaken in late 2005, of all vocationally registered New Zealand surgeons. It describes their age and gender distribution, their workload, the distribution of their work hours and limitations on their activities. It is hoped that this will contribute to planning of surgical services for the future. Of surgeons surveyed, 452 (73%) responded. Their mean age was 51 years and 7% were female. Recruitment has been stable at approximately 20 per year since 1990. New Zealand surgeons worked, on average, 48 h per week and could accommodate additional work. Seventy-seven per cent of surgeons took after-hours calls and reported a 55% chance of returning to the hospital each week (30% in the main population centres and 70% in other districts). Overall, surgeons spent 50% of their clinical time in private practice. Most surgeons experienced significant resource constraints in providing surgical care. The current workload of surgeons in New Zealand is acceptable but after-hours duties, especially in secondary hospitals, may be unattractive. Surgical services are currently limited by institutional resources. If there is a substantial increase in the need for surgery in the future, surgical recruitment, which has been stable, should be increased. [source] Inclusion or control? commissioning and contracting services for people with learning disabilitiesBRITISH JOURNAL OF LEARNING DISABILITIES, Issue 4 2006Liam Concannon Accessible summary ,,The rise of new public management has seen the role of the social worker becoming increasingly administrative and less about face to face contact with service users. ,,When commissioning managers seek to help people with learning disabilities plan their services, who actually makes the decisions? ,,Direct payments are proposed as the answer for people with learning disabilities to take the lead, but is this a real shift in power from managers to service users? This paper examines what commissioning and contracting means for people with learning disabilities. It asks if the voices of service users are heard when it comes to planning their services and, more significantly, are their choices respected and acted upon by commissioners? The government believes the introduction of direct payments will change the way social care is administered, by placing both the decision-making and funding, firmly in the hands of people with learning disabilities. However, the question remains as to how far this can be successful, considering the complicated administration and financial processes involved. The paper explores new ground in terms of research by investigates the effects that new public management, in the form of commissioning and contracting, has on the lives of people with learning disabilities. It looks at the relationship between the service user, care manager and commissioner, and asks whether management structures help individuals or actually create further barriers to participation and inclusion. Summary This paper seeks to critically assess the impact made by the introduction of commissioning and contracting as a new culture of social care in learning disability services. It offers an evaluation of the growth in importance of the user as consumer. Does the commissioning and the contract process give users with learning disabilities a greater influence over their services and ultimately their lives? It is suggested that far from empowering people with learning disabilities to have a say in the services they want, the emerging culture of business contracts and new public management transfers power firmly back into the hands of professionals making the decisions. Social work practice is changing in response to major shifts in social trends and at the behest of market values. Traditional models are being rejected and the challenge for social work is to adapt itself to operate within a competency based paradigm. The paper argues that at the centre of this new culture is a government use of a system of performance management that successfully drives down cost. Thus there remain contradictions between the adoption of a mixed economy of care; services planning; consumerism; resource constraints; and the communication difficulties experienced by many people with learning disabilities. [source] | |||||||||||||||||||||||||