Analysis, design and investigation on a new single-phase switched quasi Z-source inverter for photovoltaic application

Abstract: This paper addresses the approach to improve the efficiency of the quasi Z-source inverter. In order to increase the efficiency the reduction of conduction losses is one way to approach. Sequentially to decrease the conduction losses in the quasi z-source inverter the replacement of diode is replacing with switches is proposed which is also called as synchronous rectification. The paper represents basics of the approach, analysis and comparison of the power losses of the traditional and proposed designs of the grid connected PV-system with quasi z-source inverter system. The proposed approach validated on the computer simulations in the MATLAB environment

AN UPDATE ON BIO-POTENTIATION OF DRUGS USING NATURAL OPTIONS

The objective of this review is to put a light on the benefits of bio-enhancers and their role in developing a proper drug delivery system having improved therapeutic action and least drawbacks. As medical science is developing fast and there is a considerable increase in the development of new drugs with many therapeutic activities, but having lots of side effects, less in vivo action, or are very costly. These drawbacks create an enormous demand for use of bio-enhancers to reduce the dose required of the active ingredients and provide a suitable condition for their actions. There are vast nature-derived bio-enhancers originated from plants or other natural sources, used to a great extent as they show high activity and have very little or no adverse effects. Bio-enhancers increase bioavailability in various ways such as by increasing drug absorption, decreasing drug metabolism, and by other methods, which helps the drug having low bioavailability but the good therapeutic potential to show its effect fast. The concept of bio-enhancers developing increasingly in modern medicine but in reality, was there and well explained in Ayurveda texts with various herbal drugs such as piperine, quercetin, genistein, naringin and some non-herbal compounds such as cow urine distillate, and Capmul. Along with these nature-derived bio-enhancers and the new techniques such as liposomes, nanoparticles, transferosomes, and ethosomes resulted in the successful modification of suitable dosage forms. The concept of bioenhancers and their application is a great tool which can lead to a excellent development of medical science

Fundamental Analysis Of Hedge Funds

Hedge funds are private investment vehicles that were founded in 1948 by A.W Jones & Co. because of the need of tools which could use different strategies from the existing ones to reduce risk and generate maximum return. Hedge Funds uses great leverage to generate very high return so it make them prone to generating very big losses. Hedge Funds Require Very in depth knowledge of market so thats why not everyone is not allowed to participate in this. People with sufficient financial stability only are allowed to invest in this. Strategy of hedge funds depends on manager’s knowledge ,expertise and investor’s risk and return profile . This depends on various economical ,political and company related factors. Remuneration of a Manager is done in two ways: a fixed management fee and second incentive based on performance of funds. There are several provisions in that of high water mark, hard hurdle rate, soft hurdle rate which determines manager’s remuneration and always pushes him to generate higher profits. Hedge Funds invest in anything that is available to generate arbitrage profits.

A Cross-Sectional Questionnaire Based Study to Evaluate Subjective Sleep Quality among Undergraduate Students in India

Irregular sleep patterns are often a major hindrance in the life of undergraduate students, fueled by the undulating lifestyle anomalies and new vulnerabilities that come with college life. Insomnia, slapdash sleep cycles, and daytime dysfunction may affect both physical as well as mental well-being of individuals. India has the largest share of young adults in the world, which also makes it a likely epicenter for increasing sleep disorders. Students are often exposed to a significantly high level of academic burden and turn to options such as pulling all-nighters that further propel these issues. Most students realize the effects of a bad sleep schedule but nonetheless sacrifice it for the promise of better grades ignoring the double-edged sword. This study assesses the association of self-rated subjective sleep quality with habits prevalent among undergraduate students in India and its effect on their academic performance. Based on a modified PSQI questionnaire, the participants’ sleep quality was scored and a large majority of students showed an overall moderately good sleep quality. Insufficient sleep was seen to have an adverse effect on facial appearance, work productivity and enthusiasm for daily chores, among students. Unlike previous reports, the current dataset did not reveal any significant impact of sleep quality on the academic performance of the students. We also analyzed the most prevalent factors that were responsible for disruption of sleep in college goers and probed the major reasons for nighttime phone usage, which revealed social media to be a major contributor. Although the negative impact of sleep deprivation on academic performance has been studied earlier, any differential impact of stream has not been addressed thoroughly. Unlike the common belief of disparity induced due to stream-based academic pressure, our survey analysis showed insignificant contribution of stream leading to differences in sleep quality of students. Although participants’ reported mild disruption in sleep, it was observed across all streams and it did not seem to have an immediate effect on overall sleep quality of undergraduate students

Abstracts of International Conference on Innovations in Business Management

This book contains abstracts of the various research ideas of the academic community and practitioners of management presented at the International Conference on Innovations in Business Management (ICIBM 2020). The researchers have contributed toward various themes of the conference such as sustainable economy, supply chain, women-empowerment, export-import, microfinance, government policies, etc. We strongly believe that it will open up further scope for in-depth research in various disciplines of business management. Best wishes to the participants to have detailed discussions on the above-said wide range of areas. Conference Title: International Conference on Innovations in Business ManagementConference Acronym: ICIBM 2020Conference Date: 16-17 January 2020Conference Location: ICFAI University, Dehradun, IndiaConference Organizers: ICFAI Business School, ICFAI University, Dehradun, India & University of Derby, United Kingdo

SARS-CoV-2 vaccination modelling for safe surgery to save lives: data from an international prospective cohort study

Background Preoperative SARS-CoV-2 vaccination could support safer elective surgery. Vaccine numbers are limited so this study aimed to inform their prioritization by modelling. Methods The primary outcome was the number needed to vaccinate (NNV) to prevent one COVID-19-related death in 1 year. NNVs were based on postoperative SARS-CoV-2 rates and mortality in an international cohort study (surgical patients), and community SARS-CoV-2 incidence and case fatality data (general population). NNV estimates were stratified by age (18-49, 50-69, 70 or more years) and type of surgery. Best- and worst-case scenarios were used to describe uncertainty. Results NNVs were more favourable in surgical patients than the general population. The most favourable NNVs were in patients aged 70 years or more needing cancer surgery (351; best case 196, worst case 816) or non-cancer surgery (733; best case 407, worst case 1664). Both exceeded the NNV in the general population (1840; best case 1196, worst case 3066). NNVs for surgical patients remained favourable at a range of SARS-CoV-2 incidence rates in sensitivity analysis modelling. Globally, prioritizing preoperative vaccination of patients needing elective surgery ahead of the general population could prevent an additional 58 687 (best case 115 007, worst case 20 177) COVID-19-related deaths in 1 year. Conclusion As global roll out of SARS-CoV-2 vaccination proceeds, patients needing elective surgery should be prioritized ahead of the general population.The aim of this study was to inform vaccination prioritization by modelling the impact of vaccination on elective inpatient surgery. The study found that patients aged at least 70 years needing elective surgery should be prioritized alongside other high-risk groups during early vaccination programmes. Once vaccines are rolled out to younger populations, prioritizing surgical patients is advantageous