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Search: WFRF:(Bayona H)

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  • Bayona, Jhon F., et al. (author)
  • Linear Control of a Power Factor Correction Rectifier in Half-bridge Configuration
  • 2016
  • In: IEEE CACIDI 2016 - IEEE CONFERENCE ON COMPUTER SCIENCES. - : IEEE. - 9781509029389
  • Conference paper (peer-reviewed)abstract
    • This paper presents a detailed analysis of a single phase high power factor boost half-bridge rectifier (RPFU-HBB). The purpose of this work is to achieve a unity power factor with tight-regulated output voltage. Using the experimental prototype for 120 Vrms input voltage, output power 80W and output voltage of 450V; a power factor of 0.99 and total harmonic distortion of 2.5% was obtained. In order to eliminate the unbalance voltage of the two output capacitors a special control scheme was developed. Modeling, theoretical linearization around the operating point of the RPFU-HBB, design considerations of the current controller output voltage by means of average current method and experimental work tested through simulation model RPFU-HBB are presented.
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  • Owolabi, Mayowa O., et al. (author)
  • Gaps in Guidelines for the Management of Diabetes in Low- and Middle-Income Versus High-Income Countries : A Systematic Review
  • 2018
  • In: Diabetes Care. - : AMER DIABETES ASSOC. - 0149-5992 .- 1935-5548. ; 41:5, s. 1097-1105
  • Research review (peer-reviewed)abstract
    • OBJECTIVE The extent to which diabetes (DM) practice guidelines, often based on evidence from high-income countries (HIC), can be implemented to improve outcomes in low-and middle-income countries (LMIC) is a critical challenge. We carried out a systematic review to compare type 2 DM guidelines in individual LMIC versus HIC over the past decade to identify aspects that could be improved to facilitate implementation. RESEARCH DESIGN AND METHODS Eligible guidelines were sought from online databases and websites of diabetes associations and ministries of health. Type 2 DM guidelines published between 2006 and 2016 with accessible full publications were included. Each of the 54 eligible guidelines was assessed for compliance with the Institute of Medicine (IOM) standards, coverage of the cardiovascular quadrangle (epidemiologic surveillance, prevention, acute care, and rehabilitation), translatability, and its target audiences. RESULTS Most LMIC guidelines were inadequate in terms of applicability, clarity, and dissemination plan as well as socioeconomic and ethical-legal contextualization. LMIC guidelines targeted mainly health care providers, with only a few including patients (7%), payers (11%), and policy makers (18%) as their target audiences. Compared with HIC guidelines, the spectrum of DM clinical care addressed by LMIC guidelines was narrow. Most guidelines from the LMIC complied with less than half of the IOM standards, with 12% of the LMIC guidelines satisfying at least four IOM criteria as opposed to 60% of the HIC guidelines (P < 0.001). CONCLUSIONS A new approach to the contextualization, content development, and delivery of LMIC guidelines is needed to improve outcomes.
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