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At least 433 records · Page 24Linked to original sources
PubMed2003

Periodic coexistence of four species competing for three essential resources.

We show the existence of a periodic solution in which four species coexist in competition for three essential resources in the standard model of resource competition. By assuming that species i is limited by resource i for each i near the positive equilibrium, and that the matrix of contents of resources in species is a combination of cyclic matrix and a symmetric matrix, we obtain an asymptotically stable periodic solution of three species on three resources via Hopf bifurcation. A simple bifurcation argument is then employed which allows us to add a fourth species. In principle, the argument can be continued to obtain a periodic solution adding one new species at a time so long as asymptotic stability can be assured at each step. Numerical simulations are provided to illustrate our analytical results. The results of this paper suggest that competition can generate coexistence of species in the form of periodic cycles, and that the number of coexisting species can exceed the number of resources in a constant and homogeneous environment.

Animals↗
PubMedDate not supplied

Human resources and health outcomes: cross-country econometric study.

BACKGROUND: Only a few studies have investigated the link between human resources for health and health outcomes, and they arrive at different conclusions. We tested the strength and significance of density of human resources for health with improved methods and a new WHO dataset. METHODS: We did cross-country multiple regression analyses with maternal mortality rate, infant mortality rate, and under-five mortality rate as dependent variables. Aggregate density of human resources for health was an independent variable in one set of regressions; doctor and nurse densities separately were used in another set. We controlled for the effects of income, female adult literacy, and absolute income poverty. FINDINGS: Density of human resources for health is significant in accounting for maternal mortality rate, infant mortality rate, and under-five mortality rate (with elasticities ranging from -0.474 to -0.212, all p values < or = 0.0036). The elasticities of the three mortality rates with respect to doctor density ranged from -0.386 to -0.174 (all p values < or = 0.0029). Nurse density was not associated except in the maternal mortality rate regression without income poverty (p=0.0443). INTERPRETATION: In addition to other determinants, the density of human resources for health is important in accounting for the variation in rates of maternal mortality, infant mortality, and under-five mortality across countries. The effect of this density in reducing maternal mortality is greater than in reducing child mortality, possibly because qualified medical personnel can better address the illnesses that put mothers at risk. Investment in human resources for health must be considered as part of a strategy to achieve the Millennium Development Goals of improving maternal health and reducing child mortality.

Child, Preschool↗
PubMed2000

Psychological distress in grandmother kinship care providers: the role of resources, social support, and physical health.

OBJECTIVE: The purpose of the present study was to investigate predictors of psychological distress in grandmother kinship care providers. More specifically, it was hypothesized that social support, family resources, and physical health would predict psychological distress in grandmothers raising grandchildren. METHOD: One hundred and two grandmothers raising grandchildren in parent-absent homes completed the Brief Symptom Inventory, Short Health Form-36, Family Resource Scale, Family Support Scale, and a questionnaire requesting background and demographic data. RESULTS: Results indicated that psychological distress was predicted by family resources, participants' physical health, and to a lesser extent, social support. CONCLUSION: The findings indicate that family resources, social support, and physical health affected psychological distress in grandmothers raising grandchildren. Grandmothers who reported fewer resources, less social support, and poorer physical health tended to experience higher levels of psychological distress. This study suggests that greater attention be given to interventions aimed to decrease psychological distress and improve the financial resources and physical health of grandmothers raising grandchildren.

Adult↗
PubMed2002

Staking a claim for claims: a case study of resource allocation in Australian Aboriginal health care.

There have been numerous ways in which the notion of equity has been put forward in the literature. This reflects the fact that equity is essentially driven by values and is therefore subject to individual interpretation and preferences. Deciding between these various value judgements is however outside the scope of economic analysis, as conventionally defined. This poses a problem for the examination of issues of resource allocation in Aboriginal health services in Australia, where equity, very clearly, has a role to play. One possibility for moving forward on this issue is the adoption of a 'claims' approach where the emphasis is on the explicit recognition of the values to be employed in the 'equitable' allocation of resources. This involves teasing out the principles by which, under various approaches, resources are allocated differentially across groups (e.g. under resource allocation formulae, the criterion of 'need' as measured by SMRs can be viewed to be a basis for a 'claim' over resources). The commonly cited 'basic needs approach' is then used in the paper as a case in point to illustrate how such underlying principles may be identified and then assessed. In relation to the issue of equity in Aboriginal health services, there are a number of possible standards for equity which seem to have a significant degree of community acceptance. The paper discusses ways in which they can be applied to the problem of deciding how to allocate resources in Aboriginal health.

Australia↗
PubMed2004

The pursuit of equity in NHS resource allocation: should morbidity replace utilisation as the basis for setting health care capitations?

Although the English NHS has been described as a world leader in pioneering methods of distributing expenditure in relation to population needs, concerns about the legitimacy of using the current utilisation-based model to allocate health service resources are mounting. In this paper, we present a critical review of NHS resource allocation in England and demonstrate the feasibility and impact of using direct health estimates as a basis for setting health care capitations. Comparing target allocations for the inpatient treatment of coronary heart disease in a sample of 34 primary care trusts in contrasting locations in England, we find that a morbidity-based model would result in a significant shift in hospital resources away from deprived areas, towards areas with older demographic profiles and towards rural areas. Discussing the findings in relation to a wider policy context that is generally concerned to direct more health care resources towards the poor, the paper concludes by calling for greater clarity between the goals of health care equity and health equity. Whilst the former demands that the legitimate needs of demographically older populations for more health care resources are acknowledged, the goal of health equity requires real political commitment to resource broader social policy initiatives.

Adolescent↗
PubMedDate not supplied

Resource dependency and community participation in primary health care.

Great hope is accorded to community participation in health. A large number of potential benefits are attributed to participatory processes, including better addressing community needs through more locally adapted organizational processes and improvement in health outcomes. To this end, many governments around the world have adopted policies and programmes of community participation as part of their strategy to implement primary health care services. In Mexico this is, in great part, realized through the module programme of the Ministry of Health. A module is characterized by various village based health posts (casas de salud), each operated by a community volunteer and associated with a health committee, all of which are supervised by a nurse from a nearby health centre. The southern Mexican state of Oaxaca was chosen for a study of the module programme (during the period 1987-1992) to gain a better understanding of how organizational processes impact on the implementation and outcomes of community participation programmes in large institutions (i.e. the Ministry of Health). The resource dependency perspective formed the basis for the theoretical framework used. Some 75 towns and villages were visited and about 170 health related personnel from all over the state were interviewed to obtain data on the operation and impact of the module programme. As predicted by resource dependency theory, which postulates that organizations will react to pressures in their external environment to secure the resources needed for survival, the findings of this research led to the conclusion that the Ministry of Health had co-opted the resources of the communities it was involving in the module programme in order to meet its policy objectives, especially those related to expanding service coverage. Community participation in the module programme was found to have been implemented entirely for its utility in supplying resources and not for democratic or intrinsic values. This strategy, identified as the resource dependency approach to community participation, led to several flaws in the participatory process and resulted in far less than what could potentially have been achieved in terms of improving health outcomes. Ultimately, the participatory mechanisms became additional dependencies of the health system and not integral components of a process of community development. Large institutional programmes of community participation can benefit by understanding this approach and avoiding its inherent problems.

Community Participation↗
PubMed1997

[Characteristics of patients and use of resource in French pediatric intensive care units. Le groupe francophone de Rèanimation et urgences pédiatriques].

UNLABELLED: Evaluation of case-mix and resource consumption in pediatric intensive care units (ICU) is required. AIMS: This study describes the patterns of pediatric ICU resource consumption, determines the impact of primary clinical characteristics (particularly severity of illness) on resource utilization, and analyses medical efficiency with the frequency of inappropriate stays in French pediatric ICU. METHODS: Prospective study in nine French volunteer multidisciplinary pediatric ICUs from December 1993 to April 1994. Premature neonates were excluded. Resource consumption was expressed using the Omega system and length of stay, from which total Omega per admission, and average daily Omega (total Omega/length of stay) were obtained. RESULTS: Seven hundred and twelve patients were eligible. Twenty-five percent were full-term neonates, 30% infants (1 month to 1 year), and 45% children. Surgical patients constituted 22% of the population. A chronic disease was present in 45% of infants and children. Immunodeficiency was present in 10% of patients. The median length of stay was 4 days (range: 1-155). The mean Omega scores per admission were: total Omega = 92 +/- 124, Omega/day = 14 +/- 9. Sixty-four percent required mechanical ventilation and 37% during more than 2 days. Forty-two percent had a central venous access, and 23% an arterial line. The resource consumption was greater in non-survivors, surgical patients, neonates, and immunosuppressed patients. The mean PRISM score was 9 +/- 9. Mortality was 13%. The Omega/day and the PRISM score correlated. The frequency of inappropriate stays was 7.6% and accounted for 1.0% of the overall Omega activity. CONCLUSIONS: The results of this study can be used for interinstitutional comparison and a broader appraisal of pediatric intensive care. They illustrate the relationship between severity of illness and resource consumption. French pediatric ICU efficiency seems to be high, as compared to North American and Dutch results.

Adolescent↗
PubMedDate not supplied

Personnel resource distribution for nursing programs in Carnegie-classified Research I and II and Doctoral I institutions.

Increasingly, nursing education programs, like other major institutions in the United States, are being charged to "do more with less." How to acquire sufficient human and material resources is a continuing challenge in an era of economic constraint. Benchmark data on the distribution of personnel resources within nursing programs is nearly nonexistent. To assess the personnel resources of nursing programs of major size and stature within the United States, a Personnel Resource Survey was mailed to the universe of all nursing programs located in Carnegie-designated Doctoral I, Research II, and Research I universities and/or colleges in the United States (n = 96). The return rate was 58 per cent, with a useable survey rate of 51 per cent (n = 49). Comparative numbers and ratios of administrators, faculty, students, and various levels and types of support staff by Carnegie-type institutions are presented. Findings indicate that, overall, nursing programs in Research I universities had 1.5 to 2 times as many personnel resources per student than programs in Doctoral I and Research II institutions. Doctoral I and Research II programs closely resembled each other. The details of the data, as well as its standardization into full-time equivalents, are useful to both university and nursing administrators, faculty, and staff in their comparisons and procurement of needed resources.

Benchmarking↗
PubMed2004

Fungal genetic resource centres and the genomic challenge.

Fungal research and education has for many years been supported by public service genetic resource centres, whose roles have been to maintain, preserve and supply living cultures to the research community. In the genomic era, genetic resource centres are perhaps more important than ever before. The cultures held, many of which are described and validated by expert biosystematists, are valuable resources for the future. There is a need to supply genomic and proteomic research programmes with fully characterised organisms, as usage of organisms from unreliable sources can prove disastrous, not least in economical terms. However, mycologists often require more than just the organisms, for example, their associated information is vital for bioinformatic applications and some researchers may only require genomic DNA from the organism rather than the organism per se. Genetic resource centres are continually adapting to meet the needs of their users and the wider mycological research community, this associated with OECD international initiatives should ensure they exist to support research for many years to come. This review considers the impact of such initiatives, the current roles of fungal genetic resource centres, the mechanisms used to preserve organisms in a stable manner and the range of resources that are offered for genomic research.

Computational Biology↗
PubMed2004

Resources and resilience in the transition to adulthood: continuity and change.

Patterns of continuity and change in competence and resilience over the transition to adulthood were examined in relation to adversity and psychosocial resources, with a focus on adaptive resources that may be particularly important for this transition. Variable-focused and person-focused analyses drew on data from the Project Competence longitudinal study of a school cohort followed over 20 years from childhood through emerging adulthood (EA) into the young adulthood (YA) years with excellent retention (90%). Success in age-salient and emerging developmental tasks from EA to YA was examined in a sample of 173 of the original participants with complete data on adversity, competence, and key resources. Regressions and extreme-group analyses indicated striking continuity in competence and resilience, yet also predictable change. Success in developmental tasks in EA and YA was related to core resources originating in childhood (IQ, parenting quality, socioeconomic status) and also to a set of EA adaptive resources that included planfulness/future motivation, autonomy, adult support, and coping skills. EA adaptive resources had unique predictive significance for successful transitions to adulthood, both overall and for the small group of individuals whose pattern of adaptation changed dramatically from maladaptive to resilient over the transition. Results are discussed in relation to the possibility that the transition to adulthood is a window of opportunity for changing the life course.

Achievement↗
PubMedDate not supplied

Computerized hospital on-line resources allocation link (CHORAL): a mechanism to monitor and establish policy for hospital ambulance diversions.

Ongoing monitoring of the availability of hospital critical care resources is necessary to assure patients in the emergency medical services (EMS) system reach appropriate care. In this densely populated area Multnomah County, Oregon, ambulances have been diverted by radio from several hospitals before finding one that would accept the patient. Dispatch centers and base-stations had no reliable method to monitor the availability of hospital resources. Data were not available for use in establishing policy. In response, this community developed an on-line, computerized system known as Computerized Hospital On-Line Resources Allocation Link (CHORAL) that visually displays the resource status of all hospitals to the 911 center, base station, and participating hospitals. A change of status requires simple keystrokes for entry into the computer which in turn transmitted automatically to all other CHORAL computers. Six patient care resources are monitored: Adult Ward (AW); Computerized Axial Tomography Scan (CT); Critical Care (CC); Labor and Delivery (LD); Pediatric (PEDS); and Psychiatric Secure Beds (PSB). Paramedics use protocol to determine if a particular patient fits one of these categories. Availability is relayed to paramedics by the 911 center and the base-station. During the first three months of system operation, there were 337 diversions representing 4,527 hours among 10 of the 12 participating hospitals. The most common resource resulting in diversion was PSB, which was unavailable for 2,195 hours (48.5%). Unavailability of CT resulted in the lowest number of diversions (1.3%, 60.3 hours).(ABSTRACT TRUNCATED AT 250 WORDS)

Ambulances↗
PubMed2006

Art therapy improves coping resources: a randomized, controlled study among women with breast cancer.

OBJECTIVE: Women with breast cancer suffer from considerable stress related to the diagnosis, surgery, and medical treatment. It is important to develop strategies to strengthen coping resources among these women. Research in art therapy has shown outcomes such as an increase in self-esteem and cohesion, significant improvement in global health, and a decrease in anxiety and depression. The aim of the present article was to describe the effects of an art therapy intervention program on coping resources in women with primary breast cancer. METHOD: In this article, we report some of the results from a study including 41 women, aged 37-69 years old, with nonmetastatic primary breast cancer, referred to the Department of Oncology at Umeå University Hospital in Sweden for postoperative radiotherapy. The women represented various socioeconomic backgrounds. They were randomized to a study group (n = 20) with individual art therapy for 1 h/week during postoperative radiotherapy or to a control group (n = 21). The article focuses on changes in coping resources, as measured by the Coping Resources Inventory (CRI) before and 2 and 6 months after the start of radiotherapy. The study protocol was approved by the Umeå University Ethical Committee at the Medical Faculty (archive number 99-386). RESULTS: There was an overall increase in coping resources among women with breast cancer after taking part in the art therapy intervention. Significant differences were seen between the study and control groups in the social domain on the second and third occasions. Significant differences were also observed in the total score on the second occasion. SIGNIFICANCE OF RESULTS: This study shows that individual art therapy provided by a trained art therapist in a clinical setting can give beneficial support to women with primary breast cancer undergoing radiotherapy, as it can improve their coping resources.

Adaptation, Psychological↗
PubMed1997

Improving resource utilization through patient dependency systems.

Hospitals are striving for funds and at the same time are required to improve the delivery and quality health care to patients. Naturally this strains hospital resources and requires sophistication in planning and in resource utilization. Nursing staff time remains one of the most important resources that require careful planning. Scheduling the time and duties of the nursing staff on the basis of patients' needs could improve the quality of care and ultimately leads to efficient utilization of hospital resources. This paper presents a model for allocating nursing staff duties using a Patient Dependency System. The model was developed using a time motion study conducted in a leading hospital. Resource utilization indexes were compared before and after the model was implemented. Results show significant increase in the efficiency of utilization of resources and improvement in the quality of the care. The model presented as a set of decision making rules suitable for use in a Patient Dependency Knowledge Based System.

Budgets↗
PubMed1999

Internet resources for the clinical geneticist.

The Internet offers a number of resources to clinical geneticists. This review outlines some of these with special emphasis on sites present at the National Center for Biotechnology Information (NCBI) at the National Library of Medicine at the National Institutes of Health. Special attention is presented on how these various resources make use of PubMed, the premiere source of MEDLINE information on the Internet. Three NCBI resources are presented here. 1) 'Genes and diseases': a general curated series of web pages outlining various references to known genetic diseases with links to relevant on-line resources. 2) The Online Mendelian Inheritance in Man (OMIM) from Victor A. McKusick at Johns Hopkins University presents our current knowledge of all known human genetic diseases. 3) Human genome resources describe our current knowledge on the human genome project (HGP). A list of relevant uniform resource locators (URLs) is also included.

Amino Acid Sequence↗
PubMed1990

Life stressors, social resources, and late-life problem drinking.

Life stressors and social resources among late-middle-aged problem and nonproblem drinkers were studied. Problem drinkers (n = 501) reported more negative life events, chronic stressors, and social resource deficits than did nonproblem drinkers (n = 609). In a comparison of problem drinkers, men reported more ongoing stressors involving finances and friends, and fewer resources from children, extended-family members, and friends than did women. Women who are problem drinkers reported more negative life events, more ongoing difficulties with spouses and extended-family members, and fewer resources from spouses. Among both the problem and nonproblem drinkers, more stressors were associated with fewer social resources, but only within certain life domains. Late-middle-aged adults' chronic stressors and social resources helped explain their drinking behavior, depression, and self-confidence even after sex, marital status, and negative life events were considered.

Age Factors↗
PubMed2003

Supporting biosciences in the nursing curriculum: development and evaluation of an online resource.

AIMS: The aim of this project was to develop and evaluate an online resource designed to improve the biosciences knowledge of preregistration nursing students. BACKGROUND: A number of studies have identified lack of biological subject knowledge and anxiety about studying biosciences as serious problems for nursing students. The availability of a contextualized biological information resource prior to and early in their studies might help to reduce this fear and anxiety. METHODS: The project used an action research approach, involving an initial analysis of the extent of the problems with biosciences encountered by our nursing students, followed by the development and evaluation of a biology-based open learning resource (entitled Headstart) in collaboration with preregistration nursing students and nurse educators. FINDINGS: The students in this study expressed a high level of concern about studying biology, and perceived this to be the most difficult aspect of their nursing programme (significantly more difficult than nursing practice). A significant correlation was also found between previous level of biological qualification and confidence in passing module tests. Evaluation of the new online resource illustrated the willingness of nursing students to use such a package, and general approval of its content and mode of delivery, despite a number of problems related to computer access and students' inexperience with information technology. CONCLUSIONS: This project has provided further evidence of the need for additional resources in biosciences for nursing students. It has also illustrated the way in which a targeted online resource has the potential to provide substantial benefits in terms of supporting the nursing curriculum. Whilst further evaluation is needed, the findings suggest that Headstart has the potential to address a number of issues identified both by this study and by previous research in nurse education.

Attitude of Health Personnel↗
PubMed2004

Niche tradeoffs, neutrality, and community structure: a stochastic theory of resource competition, invasion, and community assembly.

Stochastic niche theory resolves many of the differences between neutral theory and classical tradeoff-based niche theories of resource competition and community structure. In stochastic niche theory, invading species become established only if propagules can survive stochastic mortality while growing to maturity on the resources left unconsumed by established species. The theory makes three predictions about community structure. First, stochastic niche assembly creates communities in which species dominate approximately equally wide "slices" of the habitat's spatial heterogeneity. These niche widths generate realistic distributions of species relative abundances for which, contrary to neutral theory but consistent with numerous observations, there are strong correlations among species traits, species abundances, and environmental conditions. Second, slight decreases in resource levels are predicted to cause large decreases in the probability that a propagule would survive to be an adult. These decreases cause local diversity to be limited by the inhibitory effects of resource use by established species on the establishment (recruitment) of potential invaders. If resource pulses or disturbance allowed invaders to overcome this recruitment limitation, many more species could indefinitely coexist. Third, the low invasibility of high diversity communities is predicted to result not from diversity per se, but from the uniformly low levels of resources that occur in high-diversity communities created by stochastic competitive assembly. This prediction provides a potential solution to the invasion paradox, which is the tendency for highly diverse regions to be more heavily invaded.

Computer Simulation↗
PubMed1971

Resource specialization and equilibrium population size in patchy environments.

A simple model is formulated in which the growth of a consumer population is regulated by the diversity, quantity, and quality of alternate environmental resources. Equilibrium population size is dependent not only upon these resource characteristics, but upon the pattern of resource exploitation by the consumer. It is proven that in many circumstances, an exploitation pattern in which each individual uses each of the alternate resources leads to a greater equilibrium size for the consumer population than does a pattern of resource specialization. Therefore, given a knowledge of resource qualities, it is possible to predict the exploitation pattern that will lead to the largest equilibrium population size for the consumer species.

Environment↗