An Insight into the Battery Degradation for a Proposal of a Battery Friendly Charging Technique

Abstract Li-ion batteries are widely used in electric vehicles because of their promising characteristics that meet high specific power and energy density requirements. The only setback is the capacity fading due to degradation in Li-ion batteries. The rate of capacity fade in Li-ion batteries in EVs vary based on the charging rate, changes in internal cell temperature and external ambient temperature, and user driving patterns. Since the Li-ion battery is electrochemical, determining the actual cause of degradation at a particular instant and constraining the rate is a big challenge. Further, the causes are related to parameters which are chemical, electrical and mechanical. In this work, the causes of degradation are studied by analysing the variation of parameters for multiple charge types and rates at different ambient temperatures. The analysis leads to developing a new universal charging scheme suitable to fast charge battery at different ambient temperatures appropriately and constrain battery degradation.</jats:p

An Insight into the Battery Degradation and a Proposal for a Battery Friendly Charging Technique

Abstract Li-ion batteries are widely used in electric vehicles because of their promising characteristics that meet high specific power and energy density requirements. The only setback is the capacity fading due to degradation in Li-ion batteries. The rate of capacity fade in Li-ion batteries in EVs vary based on the charging rate, changes in internal cell temperature and external ambient temperature, and user driving patterns. Since the Li-ion battery is electrochemical, determining the actual cause of degradation at a particular instant and constraining the rate is a big challenge. Further, the causes are related to parameters which are chemical, electrical and mechanical. In this work, the causes of degradation are studied by analysing the variation of parameters for multiple charge types and rates at different ambient temperatures. The analysis leads to developing a new battery friendly charging scheme suitable to fast charge battery at different ambient temperatures appropriately and constrain battery degradation.</jats:p

Perception of Health Care Professionals on Transplantation in the Treatment of COVID-19 Patients

Corona virus disease 2019 (COVID-19) caused by severe acute respiratory syndrome corona virus 2 (SARS-CoV-2) has rapidly evolved as a pandemic with a challenge to the entire world for its management. Various modalities of treatment have been tried till date and when all the modalities failed then the only option that has been shown to be successful in some cases is lung transplantation. Decision for Solid-organ transplantation is not only made based upon its therapeutic requirement but also need to be supported by the law of land. In this regard, current Nepalese law is not with the provision for lung transplantation. Thus, in order to make the concerned authorities aware of it and also as a step toward the preparedness for COVID-19 pandemic, this research has been conducted with an aim to see the perception of health care professionals of tertiary care centre of eastern Nepal regarding the legal aspects of lung transplantation. Conclusion Outcome of this research has supported the therapeutic aspect of transplantation over its legal issue in the emergency conditions like COVID-19 Pandemic.</jats:p

Formulation of Stray Loss in Medium Power Inverter-fed Induction Motors

&lt;div&gt;The work presents a fast and accurate empirical stray loss model for inverter fed three-phase induction motors (IMs). The model is intended to quantify the SL both at the design stage and, normal operation of the IM. The development of the model considers the variations of frequency, switching frequency and motor’s loading. Test data of 128 operating points of two training IMs are used to develop the model. The accuracy and prediction capability of the proposed model is presented with the measured SL values for 128 operating points of another set of two IMs of the same specifications and different geometries.&lt;/div&gt;</jats:p

Formulation of Stray Loss in Medium Power Inverter-fed Induction Motors

&lt;div&gt;The work presents a fast and accurate empirical stray loss model for inverter fed three-phase induction motors (IMs). The model is intended to quantify the SL both at the design stage and, normal operation of the IM. The development of the model considers the variations of frequency, switching frequency and motor’s loading. Test data of 128 operating points of two training IMs are used to develop the model. The accuracy and prediction capability of the proposed model is presented with the measured SL values for 128 operating points of another set of two IMs of the same specifications and different geometries.&lt;/div&gt;</jats:p

Sudden Death Due to Spontaneous Rupture of the Urinary Bladder following Acute Alcohol Inebriation- A Case report and Review of Literature

Spontaneous rupture of the urinary bladder (SRUB) is a rare clinical condition. Prompt diagnosis is often difficult both clinically and radiologically and necessitates a high index of suspicion as the patients present with non-specific abdominal pain and may not offer a clear history. The depressant effect of alcohol further complicates the diagnosis. We report a case of a young male who was unable to seek medical support and was found dead within 12 hours of the onset of abdominal discomfort following acute alcohol intoxication. At autopsy, rupture of the urinary bladder with blood and blood clots was found in the pelvic cavity with no any corresponding external injury. Spontaneous rupture of the urinary bladder is a rare cause of death in acute alcohol intoxication. In order to further understand this rare condition, the review of related literature has been done.</jats:p