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Communication infrastructure for situational awareness enhancement in WAMS with optimal PMU placement

Protection and Control of Modern Power Systems 2021年第1期6卷 124-135页

作者： Bhargav Appasani Amitkumar Vidyakant Jha Sunil Kumar Mishra abu nasar ghazali School of Electronic Engineering KIIT UniversityBhubaneswar751024India

Real time monitoring and control of a modern power system has achieved significant development since the incorporation of the phasor measurement unit (PMU). Due to the time-synchronized capabilities, PMU has increased the situational awareness (SA) in a wide area measurement system (WAMS). Operator SA depends on the data pertaining to the real-time health of the grid. This is measured by PMUs and is accessible for data analytics at the data monitoring station referred to as the phasor data concentrator (PDC). Availability of the communication system and communication delay are two of the decisive factors governing the operator SA. This paper presents a pragmatic metric to assess the operator SA and ensure optimal locations for the placement of PMUs, PDC, and the underlying communication infrastructure to increase the efficacy of operator SA. The uses of digital elevation model (DEM) data of the surface topography to determine the optimal locations for the placement of the PMU, and the microwave technology for communicating synchrophasor data is another important contribution carried out in this paper. The practical power grid system of Bihar in India is considered as a case study, and extensive simulation results and analysis are presented for validating the proposed methodology.

关键词： Situational awareness Phasor measurement unit Optimal placement Microwave communication

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Effect of SARS-CoV-2 infection on the liver

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World Journal of Virology 2023年第2期12卷 109-121页

作者： Adekunle Sanyaolu Aleksandra Marinkovic abu Fahad Abbasi Stephanie Prakash Risha Patidar Priyank Desai Martina Williams Abdul Jan Kareem Hamdy Rachael Solomon Vyshnavy Balendra Maaz Ansari Omar Shazley nasar Khan Rochelle Annan Yashika Dixon Chuku Okorie Afolabi Antonio Department of Public Health Federal Ministry of HealthAbujaNigeriaAbuja 0000FCTNigeria Department of Basic Medical Science Saint James School of MedicineThe Quarter 26400000Anguilla Department of Internal Medicine Loyola University Medical CenterMaywoodIllinoisIL 60153United States Department of Basic Medical Science American University of Saint Vincent School of MedicineSaint Vincent and the Grenadines 0000Saint Vincent and the Grenadines Department of Basic Medical Science Windsor University School of MedicineCayon 0000Saint Kitts and Nevis Department of Basic Medical Science Caribbean Medical University School of MedicineWillemstad 0000CuraçaoNetherlands Antilles Basic Medical Science Saint James School of MedicineSaint Vincent and the Grenadines 0000Saint Vincent and the Grenadines University of Health Sciences Antigua School of Medicine PiccadillySt.John's Antigua Department of Science Union County CollegePlainfieldNew JerseyNJ 07016United States Department of Internal Medicine Lloydminster Regional HospitalLloydminster S9V 1Y5SaskatchewanCanada

There have been numerous concerns about the disease and how it affects the human body since the severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)pandemic began in December 2019.The impact of SARS-CoV-2 on the liver is being carefully investigated due to an increase in individuals with hepatitis and other liver illnesses,such as alcoholic liver disease.Additionally,the liver is involved in the metabolism of numerous drugs used to treat comorbidities and coronavirus disease 2019(COVID-19).Determining how SARS-CoV-2 affects the liver and what factors place individuals with COVID-19 at a higher risk of developing liver problems are the two main objectives of this study.This evaluation of the literature included research from three major scientific databases.To provide an update on the current impact of COVID-19 on the liver,data was collected and relevant information was incorporated into the review.With more knowledge about the effect of the disease on the liver,better management and therapeutics can be developed,and education can ultimately save lives and reduce the long-term impact of the pandemic on our population.

关键词： Coronavirus COVID-19 SARS-CoV-2 Liver Hepatic complications

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Seismic Evaluation of Reinforced Concrete Frames in the Harsh Environment Using Pushover Analysis

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Open Journal of Civil Engineering 2016年第4期6卷 685-696页

作者： Mohamed Sobaih Ahmed Al ghazali Department of Structural Engineering Cairo University Gize Egypt Institute of Construction Materials Faculty of Civil Engineering TU Dresden Dresden Germany

The main objective of this paper is to evaluate the seismic response of buildings of typical reinforced concrete frames when concrete starts to deteriorate gradually and to make a comparison between the base shear and the displacement at different stages of earthquake loading. Typical 5, 15, 20 and 30-storey reinforced concrete frames have been designed for seismicity according to the recently adopted seismic code in abu Dhabi, ACI 318-08/IBC 2009 code. A pushover analysis has been performed to these four buildings by using SAP 2000. Twenty-four models have been created (6 models for each building) by decreasing the concrete strength gradually from 4000 psi (281 kg/cm2) to 1500 psi (105 kg/cm2). This is to simulate the effect of harsh environment on the strength of concrete in existing buildings.

关键词： Pushover Analysis ACI 318-08/IBC 2009 abu Dhabi Harsh Environment

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