Coronavirus disease 2019 (COVID-19) has resulted in considerable morbidity and mortality worldwide since December 2019. Diseases such as diabetes, hypertension, cardiovascular and pulmonary diseases are common comorbidities in COVID-19 patients and have been correlated with increased disease severity. Comorbidities lead the COVID-19 patient into a vicious infectious circle and are substantially associated with significant morbidity and mortality. This study was aimed to estimate prevalence of comorbidities in severe category of COVID survivors and non survivors. More than 90% patients with multiple comorbidities admitted to ICU did not survive compared to those with one or two comorbidities. Diabetes followed by hypertension was the most common comorbidity in these patients. Thus comorbid individuals must adopt vigilant preventive measures including vaccination and they require intensive management for better outcome.
The distributed propulsion system is a recent year concept used to improve Flight performance. Distributed propulsion (DP) is a type of propulsion system in which thrust is delivered by multiple propellers arranged on the wings leading edge to improve Aircraft's aerodynamic performance and decrease fuel consumption, emissions, noise, landing distance, and for better maneuverability. Several studies have reported on distributed propulsion systems but it introduces a lot of information regarding electric propulsion and development of advanced propulsion systems, Distortion of flow inside propeller blade and challenges of a Working distributed propulsion mechanism for the future Electric driven passenger and general aviation aircrafts but there was no special study happened on the comparison of DPS aircraft with any typical type of Aircraft. In this project, we compared the aerodynamic characteristics of DPS aircraft with Normal typical Aircraft. The Computational Fluid Dynamics simulation were carried out in Fluent. The meshing is Done in the Hypermesh. The study results are, for Aircraft with Distributed propulsion system, the L/D is 2.922, and for Aircraft, without Distributed propulsion system, L/D is 1.64 This study compared and shown that DPS aircraft is beneficial over other typical Aircraft in terms of Lift to Drag ratio as aerodynamics characteristic.
Abstract Background In India, a large number of patients with coronavirus disease-2019 (COVID-19), presented with common symptoms including fever, dyspnea, cough, musculoskeletal symptoms (fatigue, myalgia, joint pain) and gastrointestinal symptoms. However, information is lacking on symptoms that persist after recovery from COVID-19. In this study we assessed symptoms that persisted in patients even after their recovery and discharged from the hospital after one month from COVID-19. Methods This study is an observational cohort study. Participants in this study were enrolled between 30 to 40 days after recovery from COVID-19 of ≥18 years of age, who were hospitalized with laboratory-confirmed RT-PCR COVID-19 disease. Outcomes from post COVID-19 participants were elicited through questionnaire that consisted of three main parts beginning from subject’s demographical data, depicting about the status of COVID-19 and other co-morbidities of the subject, and about post-COVID-19 symptoms and manifestations. Results All subjects have reported some manifestation after recovery from COVID-19 whereas numerous symptoms and diseases were experienced by a great percentage of participants. Fatigue (56.25%), dyspnea (74.3%) and disturbed sleep (64.3%) were among the most common symptoms. However, more critical manifestations like renal failure and pulmonary fibrosis were reported by only a few percent of the subjects. Rating of worse physical and mental health after post-COVID recovery was also reported by subjects. There was a strong relationship found in between the presence of other co-morbidities before infection like diabetes, hypertension and in disease severity after infection. A total of 280 patients were enrolled and 160 completed the survey. Conclusions Post COVID-19 sufferers often experience symptoms that cause a disturbance in their physical health, mental health and their respiratory status for several weeks even after recovery from COVID-19. Therefore, all subjects after recovering from COVID-19 should undergo long-term monitoring programme for their symptoms and condition improvement.
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