Correlation coefficients for T-spherical fuzzy sets and their applications in pattern analysis and multi-attribute decision-making

T-spherical fuzzy set is an effective tool to deal with vagueness and uncertainty in real-life problems, especially in a situation when there are more than two circumstances, like in casting a ballot. The correlation coefficient of T-spherical fuzzy sets is a tool to calculate the association of two T-spherical fuzzy sets. It has several applications in various disciplines like science, management, and engineering. The noticeable applications incorporate pattern analysis, decision-making, medical diagnosis, and clustering. The aim of this article is to introduce some correlation coefficients for T-spherical fuzzy sets with their applications in pattern recognition and decision-making. The under discussion correlation coefficients are far more advantageous than the existing and many other tools used for T-spherical fuzzy sets, because they are used completely and demonstrate the nature as well as the limit of association between two T-spherical fuzzy sets. Further, an application of proposed correlation coefficients in pattern analysis is discussed here. In addition to it, the proposed correlation coefficients are applied to a multi-attribute decision-making problem, in which the selection of a suitable COVID-19 mask is presented. A comparative analysis has also been made to check the effectiveness of the proposed work with the existing correlation coefficients.

The Effects of the SARS-CoV-2 Virus on the Cardiovascular System and Coagulation State Leading to Cardiovascular Diseases: A Narrative Review.

The novel coronavirus pandemic has led to morbidity and mortality throughout the world. Until now, it is a highly virulent contagion attacking the respiratory system in humans, especially people with chronic diseases and the elderly who are most vulnerable. A majority of afflicted are those suffering from cardiovascular and coronary diseases. In this review article, an attempt has been made to discuss and thoroughly review the mode of therapies that alleviate cardiac complications and complications due to hypercoagulation in patients infected with the SARS-CoV-2 virus. Presently a host of thrombolytic drugs are in use like Prourokinase, Retelapse, RhTNK-tPA and Urokinase. However, thrombolytic therapy, especially if given intravenously, is associated with a serious risk of intracranial haemorrhage, systemic haemorrhage, immunologic complications, hypotension and myocardial rupture. The effects of the SARS-CoV-2 virus upon the cardiovascular system and coagulation state of the body are being closely studied. In connection to the same, clinical prognosis and complications of thrombolytic therapy are being scrutinized. It is noteworthy to mention that myocardial oxygen supply/demand mismatch, direct myocardial cells injury and acute plaque rupture are the multiple mechanisms responsible for acute coronary syndrome and cardiac complications in Covid-19 infection. However, this review has limitations as data available in this context is limited, scattered and heterogenous that questions the reliability of the same. So, more multi-centric studies involving representative populations, carried out meticulously, could further assist in responding better to cardiac complications among Covid-19 patients.

The psychological impact of the covid-19 pandemic on oral health care workers and its impact on their willingness to work during this pandemic

This study was aimed to investigate the relationship between the psychological status of oral health care workers (OHCWs) and the willingness to treat a patient during the COVID-19 pandemic. This cross-sectional study was carried out on oral health care workers at ten different dental hospitals in Pakistan from March to July 2020. Information on the socio-demographic status, and willingness to report for duty and treat patients during the COVID-19 pandemic were assessed using a self-administered questionnaire. The psychological impact of the COVID-19 pandemic was assessed using the Urdu version of the Generalized Anxiety Disorder Scale and Impact of Events Scale. Simple and multiple linear regression tests were used for analysis. A total of 392 OHCWs participated in this study and 25% of them had moderate to severe anxiety levels and only 14% had post-traumatic stress disorder. About 26% of the OHCWs were willing to work and treat patients during the COVID-19 pandemic and they had lower anxiety and stress scores. Greater anxiety and stress were associated with participants who were older, female, single, married, living with family and friends. The adjusted coefficients of GAD and IES scores were greater in participants who were not willing and unsure to work compared to their colleagues who were willing. The OHCWs are anxious and stressed because of the COVID-19 outbreak and that affects the perception of whether they should work and treat patients during the pandemic. © 2021 KBCSM, Zagreb.