519 research outputs found

    The Design and Installation of a Combined Concentrating Power Station, Solar Cooling System and Domestic Hot Water System

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    AbstractThe University of Technology, Sydney (UTS) has built a unique tri-generation system that provides chilled water, hot water, and electricity to their new Faculty of Engineering and Information Technology (FEIT) building. It integrates parabolic trough collectors, flat plate collectors, photovoltaic panels, and wind power as generators with thermal and chemical energy storage. The heat from the parabolic trough collectors is used to run a small-scale Organic Rankine Cycle (ORC) unit as well as a small-scale ammonia/water absorption chiller to provide either electricity or chilled water, respectively. The condenser heat from both units is fed into the domestic hot water (DHW) supply of the building in addition to the solar heat from the flat plate and the parabolic trough collectors. The design concept including the main system components and the system control strategy are described in detail. Further, the lessons learned during the installation and commissioning of the complex tri-generation system are given. As a novelty in this area, the tri-generation system has been specifically designed to allow students and researchers to work with it, hence this paper also describes the wide range of teaching opportunities for undergraduate and graduate engineering students as well as post-doc researchers

    Oral medicine case book 40 : Oral histoplasmosis

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    No abstract available.http://www.sada.co.zaam2013ay201

    Theology at the University of Pretoria - 100 years: (1917-2017) Past, present and future

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    In this scholarly book, a century’s theology presented by the Faculty of Theology at the University of Pretoria, is celebrated. All authors are academics or research associates of the University of Pretoria. A historical and futuristic overview with perspectives from the past, present and future, are examined. The past is not only portrayed by means of societal and scientific contributions and achievements, but the authors also reflect on malfunctions, ill behaviour and disappointments of church and theology, presented at the University of Pretoria within the South African context over 100 years. The book commences with a chapter in which institutional transformation is discussed, as well as the changes that demonstrate the role of the Faculty of Theology within a secular state university. It includes an explanation of the importance of research impact, research productivity and research reputation. Among various discipline indicators, the category Theology and Religion Studies plays a significant role in the measurement of world university rankings of universities. With regard to scientific and encyclopaedic content, the book focuses on the theological disciplines presented in the academic curricula: first the biblical sciences (Old and New Testament Studies), then the historical disciplines (Systematic Theology, Church History and Church Polity), and finally the practical disciplines (Practical Theology, Science of Religion and Missiology). The role of Religion Studies in a newly established Faculty of Theology and Religion not only enhances the diversity of interreligious tolerance and an atmosphere of dialogue, but it serves as platform to interconnect with the fields of Humanities, Social and Natural Sciences and other academic disciplines. In the conclusive part of the book, contributions highlight the role of the centres in the Faculty (Centre for Contextual Ministry and Centre for Sustainable Communities), as well as the continental and international footprints of the two theological journals whose title ownership is attached to the Faculty of Theology of the University of Pretoria, namely HTS Theological Studies and Verbum et Ecclesia. The methodology comprised in all the chapters amounts to a literature and contextual study. Since the book describes the histories of formal academic departments, these texts are of a descriptive, interpretative and critical character. Reference is made in some chapters to exegetical methods, like the historical critical methods. The target audience of the book is academic scholars and theologians, who specialise in the different fields of Theology, the Humanities and other Social Sciences. The book is also accessible to scholars of other academic disciplines outside these disciplines. The book comprises original research by several authors and is not plagiarised from other scientific publications of this nature

    a European registries collaborative project

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    Funding: Individual registries had entered into agreements with pharmaceutical companies (AbbVie, BMS, Hospira, MSD, Pfizer, Roche, UCB, Samsung and Eli Lilly). The pharmaceutical companies funding these registers were, however, not involved in the planning of the project, the statistical analyses, the interpretation of the results or the decision to publish.BACKGROUND: Lymphomas comprise a heterogeneous group of malignant diseases with highly variable prognosis. Rheumatoid arthritis (RA) is associated with a twofold increased risk of both Hodgkin's lymphoma (HL) and non-Hodgkin's lymphoma (NHL). It is unknown whether treatment with biologic disease-modifying antirheumatic drugs (bDMARDs) affect the risk of specific lymphoma subtypes. METHODS: Patients never exposed to (bionaïve) or ever treated with bDMARDs from 12 European biologic registers were followed prospectively for the occurrence of first ever histologically confirmed lymphoma. Patients were considered exposed to a bDMARD after having received the first dose. Lymphomas were attributed to the most recently received bDMARD. RESULTS: Among 124 997 patients (mean age 59 years; 73.7% female), 533 lymphomas were reported. Of these, 9.5% were HL, 83.8% B-cell NHL and 6.8% T-cell NHL. No cases of hepatosplenic T-cell lymphoma were observed. Diffuse large B-cell lymphoma (DLBCL) was the most frequent B-cell NHL subtype (55.8% of all B-cell NHLs). The subtype distributions were similar between bionaïve patients and those treated with tumour necrosis factor inhibitors (TNFi). For other bDMARDs, the numbers of cases were too small to draw any conclusions. Patients with RA developed more DLBCLs and less chronic lymphocytic leukaemia compared with the general population. CONCLUSION: This large collaborative analysis of European registries has successfully collated subtype information on 533 lymphomas. While the subtype distribution differs between RA and the general population, there was no evidence of any modification of the distribution of lymphoma subtypes in patients with RA treated with TNFi compared with bionaïve patients. © Article author(s) (or their employer(s) unless otherwise stated in the text of the article) 2017. All rights reserved. No commercial use is permitted unless otherwise expressly granted.publishersversionpublishe

    Exposure to specific tumour necrosis factor inhibitors and risk of demyelinating and inflammatory neuropathy in cohorts of patients with inflammatory arthritis : a collaborative observational study across five Nordic rheumatology registers

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    Funding Information: This work was supported by NordForsk and the Foundation for Research in Rheumatology (Foreum) and Vinnova. The research infrastructure was supported by funds from the Swedish Research Council, the Swedish Heart Lung Foundation and the Swedish Cancer Society, and funds from Region Stockholm-Karolinska Institutet (ALF). The Center for Treatment of Rheumatic and Musculoskeletal Diseases (REMEDY) (Norway) is funded as a Centre for Clinical Treatment Research by the Research Council of Norway (project 328657). Publisher Copyright: © 2023 Author(s) (or their employer(s)). Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.Objective To compare incidences of neuroinflammatory events, including demyelinating disease (DML), inflammatory polyneuropathies (IPN) and multiple sclerosis (MS), in patients with rheumatoid arthritis (RA) or spondyloarthritis (SpA; including psoriatic arthritis) starting a tumour necrosis factor inhibitor (TNFi), investigating whether monoclonal TNFi antibodies (other TNFis (oTNFis)) confer higher risk than etanercept. Methods This is an observational cohort study including patients from the five Nordic countries starting a TNFi in 2001-2020. Time to first neuroinflammatory event was identified through register linkages. We calculated crude incidence rates (cIR) per 1000 person-years and used multivariable-adjusted Cox regression to compare incidences of neuroinflammatory events overall and for DML, IPN and MS with oTNFi versus etanercept. We further examined individual TNFis and indications. Results 33 883 patients with RA and 28 772 patients with SpA were included, initiating 52 704 and 46 572 treatment courses, respectively. In RA, we observed 135 neuroinflammatory events (65% DML) with cIR of 0.38 with oTNFi and 0.34 with etanercept. The HR of oTNFi versus etanercept was 1.07 (95% CI 0.74 to 1.54) for any neuroinflammatory event, 0.79 (95% CI 0.51 to 1.22) for DML, 2.20 (95% CI 1.05 to 4.63) for IPN and 0.73 (95% CI 0.34 to 1.56) for MS. In SpA, we observed 179 events (78% DML) with cIR of 0.68 with oTNFi and 0.65 with etanercept. The HR for any neuroinflammatory event, DML, IPN and MS was 1.06 (95% CI 0.75 to 1.50), 1.01 (95% CI 0.68 to 1.50), 1.28 (95% CI 0.61 to 2.69) and 0.94 (95% CI0.53 to 1.69), respectively. Conclusion The cIRs of neuroinflammatory events are higher in SpA than in RA, but the choice of specific TNFi does not seem to play an important role in the risk of neuroinflammatory events.Peer reviewe

    Haematological malignancies in patients with psoriatic arthritis overall and treated with TNF inhibitors : a Nordic cohort study

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    OBJECTIVES: To evaluate the risk of haematological malignancies in patients with psoriatic arthritis (PsA) overall, and in relation to treatment with tumour necrosis factor inhibitors (TNFi). METHODS: We identified that patients with PsA starting a first TNFi from the clinical rheumatology registers (CRR) in the five Nordic countries (n=10 621) and biologics-naïve PsA patients from (1) the CRR (n=18 705) and (2) the national patient registers (NPR, n=27 286, Sweden and Denmark) from 2006 through 2019. For Sweden and Denmark, general population comparators were matched 5:1 to PsA patients on birth year, year at start of follow-up and sex. By linkage to the national cancer registers in all countries, we collected information on haematological malignancies overall, and categorised into lymphoid or myeloid types. We estimated incidence rate ratios (IRRs) with 95% CIs using modified Poisson regression for TNFi-treated versus biologics-naïve PsA patients and versus the general population adjusted for age, sex, calendar period and country. RESULTS: During 59 827 person-years, 40 haematological malignancies occurred among TNFi-treated patients with PsA resulting in a pooled IRR of 0.96 (0.68-1.35) versus biologics-naïve PsA from CRR and an IRR of 0.84 (0.64-1.10) versus biologics-naïve PsA from NPR. The IRR of haematological malignancies in PsA overall versus general population comparators was 1.35 (1.17-1.55). The estimates were largely similar for lymphoid and myeloid malignancies. CONCLUSIONS: Treatment with TNFi in patients with PsA was not associated with an increased incidence of haematological malignancies. Conversely, a moderately increased underlying risk was seen in patients with PsA compared with the general population.publishedVersionPeer reviewe

    Enforcement and Public Corruption: Evidence from US States

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    We use high-quality panel data on corruption convictions, new panels of assistant U.S. attorneys and relative public sector wages, and careful attention to the consequences of modeling endogeneity to estimate the impact of prosecutorial resources on criminal convictions of those who undertake corrupt acts. Consistent with system capacity arguments, we find that greater prosecutor resources result in more convictions for corruption, other things equal. We find more limited, recent evidence for the deterrent effect of increased prosecutions. We control for and confirm in a panel context the effects of many previously identified correlates and causes of corruption. By explicitly determining the allocation of prosecutorial resources endogenously from past corruption convictions and political considerations, we show that this specification leads to larger estimates of the effect of resources on convictions. The results are robust to various ways of measuring the number of convictions as well as to various estimators
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