4,258 research outputs found

    A framework for utility data integration in the UK

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    In this paper we investigate various factors which prevent utility knowledge from being fully exploited and suggest that integration techniques can be applied to improve the quality of utility records. The paper suggests a framework which supports knowledge and data integration. The framework supports utility integration at two levels: the schema and data level. Schema level integration ensures that a single, integrated geospatial data set is available for utility enquiries. Data level integration improves utility data quality by reducing inconsistency, duplication and conflicts. Moreover, the framework is designed to preserve autonomy and distribution of utility data. The ultimate aim of the research is to produce an integrated representation of underground utility infrastructure in order to gain more accurate knowledge of the buried services. It is hoped that this approach will enable us to understand various problems associated with utility data, and to suggest some potential techniques for resolving them

    Using various approaches in career counselling for traditionally disadvantaged (and other) learners: some limitations of a new frontier

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    Career counselling in a post-modern South Africa needs to shift from an objective approach to a more interpretative process. New and creative ways of assessment need to be developed. Counsellors need to be facilitators rather than experts who do all the thinking and decision making. They should allow their clients to speak, act, think and choose for themselves: in other words, clients must be led to accept responsibility for their own choices and development. In a post-modern, multicultural country this is not always as easy as it may appear to be. The purpose of this study was to compare the traditional and post-modern career-counselling approaches towards traditionally deprived learners and all other learners, focusing specifically on the practical implementation of both approaches. A case study is used as an example of efforts to justify the use of various approaches in the collection and utilisation of comprehensive data (both objective and subjective) for career counselling. South African Journal of Education Vol.24(1) 2004: 80-8

    Outbreak of tropical rat mite (Ornithonyssus bacoti) dermatitis in a home for disabled persons

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    Five mentally handicapped individuals living in a home for disabled persons in Southern Germany were seen in our outpatient department with pruritic, red papules predominantly located in groups on the upper extremities, neck, upper trunk and face. Over several weeks 40 inhabitants and 5 caretakers were affected by the same rash. Inspection of their home and the sheds nearby disclosed infestation with rat populations and mites. Finally the diagnosis of tropical rat mite dermatitis was made by the identification of the arthropod Ornithonyssus bacoti or so-called tropical rat mite. The patients were treated with topical corticosteroids and antihistamines. After elimination of the rats and disinfection of the rooms by a professional exterminator no new cases of rat mite dermatitis occurred. The tropical rat mite is an external parasite occurring on rats, mice, gerbils, hamsters and various other small mammals. When the principal animal host is not available, human beings can become the victim of mite infestation. Copyright (c) 2007 S. Karger AG, Base

    T cell clones specific for hybrid I-A molecules. Discrimination with monoclonal anti-I-A (k) antibodies

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    Alloreactive and soluble antigen-reactive, I-A-restricted T cell clones were examined for their ability to recognize hybrid I-A antigens. Several clones that recognized hybrid I-A(b)/I-A(k) molecules on (C57BL/6 x A/J)F(1) [(B6A)F(1)] spleen cells were studied. We were able to distinguish clones that recognized hybrid I-A molecules of the A(b)(a)A(k)(β) type from those that recognized A(k)(a)A(b)(β) molecules. We reached this conclusion by considering data from three independent types of experiments. (a) Monoclonal antibodies were used to inhibit T cell stimulation. Antibodies 10.2.16 and H116.32 distinguished two mutually exclusive “families” of T cell clones. One group of clones was inhibited by 10-2.16 and not H116.32, the other group exhibited reciprocal inhibition. (b) T cell proliferation was assayed using antigen-presenting cells from B6.C-H-2(bml2) (bml2) and [bml2 × B10.A(4R)]F(1) mice. Because the bml2 strain has a mutation that results in an altered A(b)(β) polypeptide chain (A(bm12)(β)), we reasoned that clones that could recognize the [bm12 × B 10.A(4R)]F(1) cells were recognizing A(b)(a)A(k)(β) molecules. Alternatively, clones not recognizing [bml2 × B10.A(4R)]F(1) cells had specificity for A(k)(a)A(b)(β) molecules. (c) I-A molecules immunoprecipitated from radiolabeled (B6A)F(1) splenocyte extracts were analyzed by two-dimensional sodium dodecyl sulfate-polyacrylamide gel electrophoresis. These experiments confirmed an earlier report that antibody 10.2.16 recognized determinants on the A(k)(β) chain (12). Antibody H116.32 immunoprecipitated products consistent with recognition of A(k)(a) determinants. Taken together, these three types of results offer conclusive evidence that T cell clones recognizing “hybrid” I-A molecules use either A(b(k)A(k)(β) or A(k)(a)A(b)(β) molecules as recognition or restriction sites. Clones whose proliferation was supported by [bm 12 x B10.A(4R)]F(1) cells and blocked by anti-I-A(k) antibody 10-2.16 recognized A(b)(a)A(k)(β) B molecules. Clones that were blocked by antibody H116.32 and did not recognize [bml2 X B10.A(4R)]F(1) cells use a recognition site(s) on A(b)(a)A(k)(β) molecules. Thus, we can demonstrate both functionally and biochemically that hybrid F(1) I-A molecules of the structure A(k)(a)A(b)(β) and A(b)(a)A(k)(β) both exist on (B6A)F(1) splenocytes and that both configurations are used in immune recognition phenomena

    Interoceptive hypersensitivity and interoceptive exposure in patients with panic disorder: specificity and effectiveness

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    BACKGROUND: Interoceptive exposure has been validated as an effective component of cognitive behavioral therapy (CBT) for the treatment of panic disorder but has hitherto received little research attention. We examined the effectiveness of various interoceptive exposure exercises using the Body Sensations Questionnaire (BSQ) (Chambless et al., 1984). METHODS: We first performed an exploratory principal factor analysis of all the items contained in the BSQ to obtain meaningful dimensions of interoceptive fears. Next, we examined the correlations between each interoceptive exposure task's degree of similarity to panic attacks and each BSQ factor and then examined whether the BSQ factor scores decreased in comparison with the baseline values when the corresponding exposure tasks were successfully completed by the subjects. RESULTS: The factor analyses revealed four factors, which we named "pseudoneurological fears", "gastrointestinal fears", "cardiorespiratory fears" and "fears of dissociative feelings." Among the nine interoceptive exposure tasks, 'hyperventilation', 'shaking head', 'holding breath' and 'chest breathing' were considered to reproduce pseudoneurological symptoms, 'breathing through a straw' was considered to reproduce gastrointestinal symptoms, and 'spinning' was considered to reproduce both pseudoneurological and dissociative symptoms; none of the interoceptive exercises were found to reproduce cardiorespiratory symptoms. Among each group of patients for whom 'hyperventilation', 'holding breath', 'spinning' or 'chest breathing' was effective, a significant improvement in the BSQ pseudoneurological fears factor scores was observed. On the other hand, no significant difference between the baseline and endpoint values of the BSQ gastrointestinal fears or the BSQ fears of dissociative feelings factor scores were observed among the patients for whom 'spinning' or 'breathing through a straw' was effective. CONCLUSION: Several interoceptive exposure tasks were particularly effective in reducing pseudoneurological fears. New interoceptive tasks, especially tasks related to cardiorespiratory and dissociative feelings, are needed

    Rising Population Cost for Treating People Living with HIV in the UK, 1997-2013

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    Background The number of people living with HIV (PLHIV) is increasing in the UK. This study estimated the annual population cost of providing HIV services in the UK, 1997–2006 and projected them 2007–2013. Methods Annual cost of HIV treatment for PLHIV by stage of HIV infection and type of ART was calculated (UK pounds, 2006 prices). Population costs were derived by multiplying the number of PLHIV by their annual cost for 1997–2006 and projected 2007–2013. Results Average annual treatment costs across all stages of HIV infection ranged from £17,034 in 1997 to £18,087 in 2006 for PLHIV on mono-therapy and from £27,649 in 1997 to £32,322 in 2006 for those on quadruple-or-more ART. The number of PLHIV using NHS services rose from 16,075 to 52,083 in 2006 and was projected to increase to 78,370 by 2013. Annual population cost rose from £104 million in 1997 to £483 million in 2006, with a projected annual cost between £721 and £758 million by 2013. When including community care costs, costs increased from £164 million in 1997, to £683 million in 2006 and between £1,019 and £1,065 million in 2013. Conclusions Increased number of PLHIV using NHS services resulted in rising UK population costs. Population costs are expected to continue to increase, partly due to PLHIV's longer survival on ART and the relative lack of success of HIV preventing programs. Where possible, the cost of HIV treatment and care needs to be reduced without reducing the quality of services, and prevention programs need to become more effective. While high income countries are struggling to meet these increasing costs, middle- and lower-income countries with larger epidemics are likely to find it even more difficult to meet these increasing demands, given that they have fewer resources

    Effect of particle size on the thermal conductivity of nanofluids containing metallic nanoparticles

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    A one-parameter model is presented for the thermal conductivity of nanofluids containing dispersed metallic nanoparticles. The model takes into account the decrease in thermal conductivity of metal nanoparticles with decreasing size. Although literature data could be correlated well using the model, the effect of the size of the particles on the effective thermal conductivity of the nanofluid could not be elucidated from these data. Therefore, new thermal conductivity measurements are reported for six nanofluids containing silver nanoparticles of different sizes and volume fractions. The results provide strong evidence that the decrease in the thermal conductivity of the solid with particle size must be considered when developing models for the thermal conductivity of nanofluids

    Nonpharmacological interventions to improve depression, anxiety, and quality of life (QoL) in people with dementia: an overview of systematic reviews

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    This overview aimed to systematically synthesize evidence from existing systematic reviews to signpost practitioners to the current evidence base on nonpharmacological interventions to improve depression, anxiety, and quality of life (QoL) in people with dementia and to discuss priorities for future research. The databases MEDLINE, PsycINFO, Scopus, and Cochrane Central Register of Controlled Trials were searched in August 2017 with an updated search in January 2019. Fourteen systematic reviews of randomized controlled trials of nonpharmacological interventions were identified. Dementia stage was rated moderate or severe in the majority of the reviews and type of dementia varied. Interventions reported to be effective were cognitive stimulation (QoL: standardized mean difference [SMD] = 0.38), music-based therapeutic interventions (depression: SMD = −0.27, anxiety: SMD = −0.43, QoL: SMD = 0.32), and psychological treatments (mainly cognitive behavior therapy; depression: SMD = −0.22, anxiety: MD = −4.57). Although health-care professionals are recommended to continue using these approaches, future research needs to focus on the type and form of interventions that are most effective for different stages and types of dementia

    Predictor Model of Root Caries in Older Adults: Reporting of Evidence to the Translational Evidence Mechanism

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    Compared to younger adults, older adults are at greater risk for root caries. A model of root caries may assist dentists in predicting disease outcomes. OBJECTIVES: Using the Iowa 65+ Oral Health Survey, analysis was done to model the patterns of the root caries development in older adults

    Lack of trust in maternal support is associated with negative interpretations of ambiguous maternal behavior

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    Attachment theory assumes that children who lack trust in maternal availability for support are more inclined to interpret maternal behavior in congruence with their expectation that mother will remain unavailable for support. To provide the first test of this assumption, early adolescents (9-13 years old) were asked to assess whether ambiguous interactions with mother should be interpreted in a positive or a negative way. In our sample (n = 322), results showed that early adolescents' lack of trust in their mother's availability for support was related to more negative interpretations of maternal behavior. The associations remained significant after controlling for depressive mood. The importance of these findings for our understanding of attachment theory, attachment stability, and clinical practice are discussed
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