Jessore University of Science & Technology

About: Jessore University of Science & Technology is a based out in . It is known for research contribution in the topics: Adsorption & Population. The organization has 811 authors who have published 974 publications receiving 10471 citations.

Prevalence of Long COVID symptoms in Bangladesh: A Prospective Inception Cohort Study of COVID-19 survivors.

Abstract: Background: The aim of this study was to identify the prevalence of 9Long COVID9 symptoms (LCS) in a large cohort of survivors and identify any potential associated risk factors. Methods: A prospective survey was undertaken of an inception cohort of confirmed COVID-19 survivors (Aged 18 to 87 years). 14392 participants were recruited from 24 testing facilities across Bangladesh between June, and November 2020. All participants had a previously confirmed positive COVID-19 diagnosis, and reported persistent symptoms and difficulties in performing daily activities. Participants who consented, were contacted by telephone, and were interviewed regarding LCS, and restriction of activities of daily living. Cardio-respiratory parameters were also measured. Statistical analysis included binary logistic and multiple linear regressions were performed with LCS as the dependent variable. Associated risk factors were identified using Structural Equation Modelling (SEM). Findings: Among 2198 participants, the prevalence of LCS at 12 weeks was 16.1%. Overall, eight LCS were identified and in descending order of prominence are: fatigue, pain, dyspnea, cough, anosmia, appetite loss, headache, and chest pain. COVID survivors experienced between 1 to 5 LCS with an overall duration period of 21.8 SD 5.2 weeks. SEM predicted the length of LCS to be related to younger age, female gender, rural residence, prior functional limitation and smoking. Interpretation: In this cohort of survivors, at 31 weeks post diagnosis, the prevalence of LCS was 16.1%. The risk factors identified for presence and longer length of LCS warrant further research and consideration to support public health initiatives. Funding: No funding

Distribution of β-Thalassemia and Other Hemoglobinopathies in Bangladeshi University Students and Ready-Made Garment Workers.

Abstract: Background The inheritable thalassemia and other structural hemoglobinopathies are prevalent globally. In Bangladesh, there is a scarcity of studies concerning thalassemia and other structural hemoglobinopathies. Hence, the present study investigated the prevalence and distribution of β-thalassemia and other hemoglobinopathies among the university students and ready-made garment (RMG) workers. Methods A cross-sectional study was conducted, whereas a total of 989 subjects were selected randomly from 10 garments industries (n=495) and five universities (n=494) for diagnosis and counseling from April 2018 to August 2018. Basic information related to the study and venous blood was collected and subjected to capillary Hb-electrophoresis for each participant. Results The present study identified thalassemia carriers and other hemoglobinopathies among 13.6% of the participants (14.1% university students and 13.2% RMG workers). The most common form of hemoglobin formation disorder was the Hb-E trait (10.5%), considering both participants' groups. Other forms of hemoglobin formation disorders observed were a β-thalassemia trait, Hb-D trait, Hb-E disease, and β-thalassemia major. The hemoglobinopathies were significantly associated with the individuals who had a family history of thalassemia and were not vaccinated against hepatitis B in the total sample. Although not statistically suggestive, the most considerable portion (87.3%) of the carriers was unmarried in the present findings. Conclusion The present study findings are anticipated to help the public health authorities by providing novel data (of a neglected cohort, ie, RGM workers), facilitating the upcoming comprehensive national thalassemia prevention programs.

Analytical study of Metal-Insulator-Semiconductor contacts for both p- and n-InGaN

Abstract: This paper has studied the metal–insulator-semiconductor (MIS) contact for both p- and n-InGaN. We found that the insulator layer thickness has a remarkable effect on the Fermi level pinning and barrier height reduction in MIS contacts. Schottky's formation with doped InGaN is explained by extending the MIS contacts' using the metal-induced gap states (MIGS) model. The J-V characteristics clarify the current transport mechanism through the MIS contact with InGaN semiconductor for different temperatures. We observed less control on the barrier height reduction in the case of n-InGaN through changing the thickness of the interfacial layer. The calculated contact resistivities of MIS contact with p- and n-InGaN show better results than the metal–semiconductor contact counterparts. These findings are highly significant to design and fabricate the InGaN based switching devices for converter applications.

Seismic Hazard Analysis for the South-Central Coastal Region of Bangladesh Considering the Worst-Case Scenario

Abstract: There is a long history of catastrophic earthquakes in and around Bangladesh due to the ongoing collision of the Indian and Eurasian plates. In this study, deterministic seismic hazard analysis (DSHA) is carried out for the south-central coastal region of Bangladesh. As a case study, important locations (i.e., Kumirmara, Nilganj, Dhulasar, Moudubi, and Char Muntaz) are selected to identify the areas that will experience the maximum and minimum seismic hazards if a catastrophic earthquake occurs. The peak ground acceleration (PGA) and spectral acceleration (SA) values at bedrock and ground surface conditions are estimated considering the worst-case scenario by using all possible seismogenic sources, controlling earthquakes, and two sets of ground motion prediction equations (GMPEs). The GMPEs and seismotectonic maps are used to determine the controlling earthquakes and the shortest distances from the sources to study areas. It is predicted that the Chittagong-Tripura folded belt (CTFB) source, which is located at the shortest distance from the selected areas, may produce the maximum magnitude earthquake. As the ground motion intensities depend on the earthquake magnitude and the distance from the sources, the maximum ground motion (PGA and SA) is observed for the CTFB source. The estimated maximum and minimum PGA values are 0.535 g and 0.301 g at the reference bedrock conditions in Char Muntaz and Kumirmara, respectively. It is observed that at all conditions and for all sources, Char Muntaz will experience the greatest ground motion and Kumirmara will experience the least ground motion. The result of this study will help to select the areas for the development of critical infrastructure in the coastal region of Bangladesh.