19 research outputs found

    Use of anticoagulants and antiplatelet agents in stable outpatients with coronary artery disease and atrial fibrillation. International CLARIFY registry

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    A Prefeasibility Solar Photovoltaic Tool for Tropical Small Island Developing States

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    Small island developing states (SIDS) are the lowest emitters of greenhouse gases yet are the most vulnerable to the impacts of global climate warming. Many islands, such as the Caribbean islands, identified solar photovoltaics as a technology for reducing greenhouse gas emissions from their electricity sector. However, prefeasibility economic studies for photovoltaics are challenging as operational photovoltaic system data are nonexistent, and the measured solar radiation datasets are limited. Thus, a prefeasibility PV tool that uses ground-measured global horizontal irradiation and a supplementary photovoltaic derating factor model is proposed for use in tropical SIDS. In addition, the bias of a modelled irradiation dataset was quantified with limited solar radiation data for a tropical Caribbean SIDS, Trinidad and Tobago. For this SIDS, the tool estimates the annual energy output of a 50 MW photovoltaic system to be 57,890 MWh and the levelized cost of electricity to be USD 0.12/kWh. The performance of the proposed tool was comparable with two existing prefeasibility models, RETScreen and SAM, which use past ground measurements and modelled data, respectively. The biases in the annual irradiation data for RETScreen and SAM were determined to be 6% and 25%, respectively, against the solar irradiance dataset used. The proposed tool may be useful for first approximation prefeasibility photovoltaic studies in similar regions with limited climatic data

    A Prefeasibility Solar Photovoltaic Tool for Tropical Small Island Developing States

    No full text
    Small island developing states (SIDS) are the lowest emitters of greenhouse gases yet are the most vulnerable to the impacts of global climate warming. Many islands, such as the Caribbean islands, identified solar photovoltaics as a technology for reducing greenhouse gas emissions from their electricity sector. However, prefeasibility economic studies for photovoltaics are challenging as operational photovoltaic system data are nonexistent, and the measured solar radiation datasets are limited. Thus, a prefeasibility PV tool that uses ground-measured global horizontal irradiation and a supplementary photovoltaic derating factor model is proposed for use in tropical SIDS. In addition, the bias of a modelled irradiation dataset was quantified with limited solar radiation data for a tropical Caribbean SIDS, Trinidad and Tobago. For this SIDS, the tool estimates the annual energy output of a 50 MW photovoltaic system to be 57,890 MWh and the levelized cost of electricity to be USD 0.12/kWh. The performance of the proposed tool was comparable with two existing prefeasibility models, RETScreen and SAM, which use past ground measurements and modelled data, respectively. The biases in the annual irradiation data for RETScreen and SAM were determined to be 6% and 25%, respectively, against the solar irradiance dataset used. The proposed tool may be useful for first approximation prefeasibility photovoltaic studies in similar regions with limited climatic data

    Atypical presentation of critical left main disease in an HIV-infected patient

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    Rajeev Seecheran,1 Valmiki Seecheran,2 Sangeeta Persad,2 Taarik Dookie,3 Naveen Anand Seecheran1 1Department of Clinical Medical Sciences, University of the West Indies, St. Augustine, Trinidad and Tobago; 2Cardiovascular Services Division, North West Regional Health Authority, Mt. Hope, Trinidad and Tobago; 3Cardiology Unit, Advanced Cardiovascular Institute, Port of Spain, Trinidad and Tobago Abstract: Coronary artery disease is currently one of the leading causes of mortality in patients with HIV. Severe left main disease (LMD) occurs in ~6% of the HIV-infected patients. We describe a case report of an atypical presentation of silent critical LMD in an HIV-infected patient who underwent a low-risk exercise stress test. The cardiovascular disease team should be vigilant for this latent phenomenon, specifically within this subpopulation despite the high Duke treadmill score. Keywords: left main disease, left main lesion, left main stenosis, human immunodeficiency virus, HI
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