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- 저자 : Aditya Shekhar (검색결과 3 건)
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Aditya Shekhar,Lucia Beloqui Larumbe,Thiago Batista Soeiro,Yang Wu,Pavol Bauer 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5
There is an increasing focus on integrating flexible dc links for bulk power routing in medium voltage distribu-tion grids. In such applications, the ac-dc Modular Multilevel Converter (MMC) devised for medium voltage and high-power ratings can be an interesting choice. This paper highlights some less explored design trade-offs arising due to the limitation on N in relation to modulation frequency and arm inductance. Specifically, the study intends to describe the interdependent influence of each degree of freedom on several aspects such as capacitor voltage balancing, circulating currents and harmonic performance. Finally, the importance of considering interhar-monics in the performance assessment of the MMC instead of the conventional interpretation of distortion calculation is highlighted.
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Aditya Shekhar,Thiago Batista Soeiro,Laura Ramirez-Elizondo,Pavol Bauer 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5
During the operation of a three line ac link in parallel with a ac-dc-ac link system that employs Back-to-Back (B2B) Medium Voltage Modular Multilevel Converters (MMC), a path for the low frequency zero sequence currents is shown to exist. Apart from causing additional losses, these currents can result in limitations on power capacity. A detailed analysis on the influence of cell capacitance, arm inductance and link conductor length on the circulating zero sequence currents and the means to mitigate them through a simulated control strategy is investigated. The simulations show that the dc link employing B2B-MMC can successfully operate in parallel with ac link without transformer isolation by controlling the zero sequence currents.
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The Use of Antibiotics in Hospice and Palliative Care Settings
Aditya C. Shekhar 한국호스피스완화의료학회 2022 한국호스피스.완화의료학회지 Vol.25 No.1
Antibiotics are commonly prescribed medications in the hospice and palliative care setting, as well as in many other healthcare settings. The overuse or negligent use of antibiotics is associated with the harmful consequence of fostering the development of antibioticresistant pathogens. Thus, there is an urgent need to critically examine and audit antibiotic use in all aspects of healthcare. In the status quo, there is a lack of consistent standards and guidelines surrounding the use of antibiotics in hospice and palliative care settings, leading to significant variations in how antibiotics are prescribed and administered in end-oflife care. It is apparent that greater thought needs to go into antibiotic decisions for patients receiving hospice or palliative care, especially considering the harmful consequences of the overprescription of antibiotics. The literature suggests that many clinicians prescribe antibiotics inappropriately for patients who would not benefit from their use or prescribe them without adequate documentation. Clinicians should be deliberate about when they prescribe antibiotics and adhere to the appropriate documentation standards and procedures within their institution or community. Future research should seek to generate generalizable knowledge about which patients will benefit most from antibiotic therapy during end-oflife care.
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