Al hossain - Academia.edu (original) (raw)

Papers by Al hossain

Antibiotics, 2022

There is an increasing focus on researching children admitted to hospital with new variants of CO... more There is an increasing focus on researching children admitted to hospital with new variants of COVID-19, combined with concerns with hyperinflammatory syndromes and the overuse of antimicrobials. Paediatric guidelines have been produced in Bangladesh to improve their care. Consequently, the objective is to document the management of children with COVID-19 among 24 hospitals in Bangladesh. Key outcome measures included the percentage prescribed different antimicrobials, adherence to paediatric guidelines and mortality rates using purposely developed report forms. The majority of 146 admitted children were aged 5 years or under (62.3%) and were boys (58.9%). Reasons for admission included fever, respiratory distress and coughing; 86.3% were prescribed antibiotics, typically parenterally, on the WHO ‘Watch’ list, and empirically (98.4%). There were no differences in antibiotic use whether hospitals followed paediatric guidance or not. There was no prescribing of antimalarials and limit...

The effect of gate length 8 nm with underlap of double gate MOSFET has been designed for VLSI Tec... more The effect of gate length 8 nm with underlap of double gate MOSFET has been designed for VLSI Technology. The evaluation process was followed by NEGF (non-equilibrium Green's function) formalism using SILVACO ATLAS followed to ITRS–2013. The investigations on the threshold voltage, Sub threshold Slope, I_ON, I_OFF, I_ON/ I_OFF, DIBL and switching characteristics of the electric field have been done with the simulation results. In the simulation, adopting symmetrical distances from source to gate and gate to drain (S-G and G-D) by fixing the gate length identical are cited as underlap. Here, the observation has been done for L_UN = (0 to 4 nm) underlap length. GaN and HfO₂ have chosen as channel material and dielectric material respectively. Proposed devices structure indicates that GaN- based DG-MOSFETs for L_G = 8 nm with var...

2019 IEEE International WIE Conference on Electrical and Computer Engineering (WIECON-ECE), 2019

Agriculture is a major sector for any developing country. As per Bangladesh’s perspective, it is ... more Agriculture is a major sector for any developing country. As per Bangladesh’s perspective, it is essential for us to focus on the Agriculture sector. In western or modern countries there had been a huge improvement in this sector by introducing modern automation techniques. Also, there is a need for a combination of electrical and agricultural scientists working together for development. The result of the combined work is called AGROBOT. The goal of the AGROBOT project is the implementation of a robotic system for agricultural operations such as plowing the field, sowing seeds, spraying fertilizers, nutrition deficiency and controlled use of fertilizers and pesticides. The agricultural scientists are experimenting to replace tractor driven mechanization with robotic agriculture by introducing “AGROBOT”. Electricity for this can be obtained from renewable energy resources like solar energy. Thus this robot is a clean energy-based farmer-friendly device. The main purpose of this project is to increase the productivity of agricultural land.

Bangladesh Heart Journal, 2016

Coronary artery disease (CAD) is a leading cause of morbidity and mortality worldwide, including ... more Coronary artery disease (CAD) is a leading cause of morbidity and mortality worldwide, including Bangladesh. Besides medical and interventional treatment, coronary artery bypass graft (CABG) surgery in an effective modality for the management of a subset of CAD patients. Off-pump coronary artery bypass graft (OPCAB) surgery is a recent modification of conventional CABG surgery, which, like other parts of the world, is being increasingly practiced in Bangladesh. But the outcome of this relatively recent surgical approach in our setting is largely unknown. In this study, the outcomes of 129 cases off-pump CABG surgery done in a tertiary cardiovascular centre and a private institute in Dhaka were analyzed. Majority (67, 54.2%) had triple vessel disease (TVD), while 4 (3.2%) patients had left main disease. One, two and three grafts were used in 17 (13.2%),74 (57.4%) and 38 (29.4%) cases respectively. There was no mortality. Post-operative complications occurred in 17 (13.18%) patients; secondary wound infection in 10 (7.75%) and immediate respiratory distress in 7 (5.43%) cases. Ten (7.75%) patients needed secondary stitches.

Bangladesh Heart Journal, 2016

Congenital heart diseases (CHDs) are a group of problems in the structure of the heart that is pr... more Congenital heart diseases (CHDs) are a group of problems in the structure of the heart that is present at birth. Signs and symptoms depend on the specific type of problem. Symptoms can vary from none to life-threatening. CHD is prevalent throughout the world including Bangladesh. It is the leading cause of birth defect-related death. Most of the patients with CHDs need corrective surgery and life-long follow up with heart care. In this series, 102 cases of CHD patients were operated, 82 of them were of atrial septal defect (ASD), 12 ventricular septal defect (VSD), 2 Tetralogy of Fallot (TOF) and 6 patent ductus arteriosus (PDA). Operative and post-operative periods were uneventful. There were no major complications including death.Bangladesh Heart Journal 2015; 30(2) : 58-60

Bangladesh Journal of Animal Science, 2014

This research was conducted to test the feasibility of using date palm(Phoenix dactylifera L.) br... more This research was conducted to test the feasibility of using date palm(Phoenix dactylifera L.) brown sugar as an alternative to refined cane sugar in preparing sweet dahi. Quality assessment tests were conducted on four different types of dahi prepared by adding different levels of date palm brown sugar, such as 10% (A), 12% (B), 14% (C) and 12% refined cane sugar (D, as control). All the samples were analyzed for organoleptic, chemical and microbiological qualities. The scores for smell and taste, body and texture, color and appearance, and total scores for four types of dahi samples showed significant differences at various levels (p<0.01 to p<0.05). It was found that scores for all the organoleptic parameters of sample B were the highest among the samples, whereas sample D obtained the lowest scores. Total viable count of bacteria and coliform count, and sugar content, ash content, and protein content were differed significantly (p<0.01). Contents for fat also sho...

2014 IEEE World Congress on Services, 2014

The demand for electronic medical data sharing is increasing due to treatment delays and increase... more The demand for electronic medical data sharing is increasing due to treatment delays and increased medication costs caused by data disorganization between healthcare providers. The integration of computer technology has met these challenges and revolutionized healthcare. Through cloud computing, data accessing from multiple locations has become easier. However, concerns about the protection of such private medical data have arisen as involuntary disclosure of this information can affect a patients personal life. Although considerable research has been done to solve this problem using a cloud brokerage system, numerous risks regarding this privacy violation problem remain. This paper aims to provide a security model for cloud data to facilitate the exchange of medical records with various institutes without privacy concerns. We demonstrate via experiment that our method yields greater performance than the existing technique.

Laboratory Investigation

As the coronavirus disease 2019 (COVID-19) pandemic evolves, much evidence implicates the heart a... more As the coronavirus disease 2019 (COVID-19) pandemic evolves, much evidence implicates the heart as a critical target of injury in patients. The mechanism(s) of cardiac involvement has not been fully elucidated, although evidence of direct virus-mediated injury, thromboembolism with ischemic complications, and cytokine storm has been reported. We examined suggested mechanisms of COVID-19-associated heart failure in 21 COVID-19-positive decedents, obtained through standard autopsy procedure, compared to clinically matched controls and patients with various etiologies of viral myocarditis. We developed a custom tissue microarray using regions of pathological interest and interrogated tissues via immunohistochemistry and in situ hybridization. Severe acute respiratory syndrome coronavirus 2 was detected in 16/21 patients, in cardiomyocytes, the endothelium, interstitial spaces, and percolating adipocytes within the myocardium. Virus detection typically corresponded with troponin depletion and increased cleaved caspase-3. Indirect mechanisms of injury-venous and arterial thromboses with associated vasculitis including a mixed inflammatory infiltrate-were also observed. Neutrophil extracellular traps (NETs) were present in the myocardium of all COVID-19 patients, regardless of injury degree. Borderline myocarditis (inflammation without associated myocyte injury) was observed in 19/ 21 patients, characterized by a predominantly mononuclear inflammatory infiltrate. Edema, inflammation of percolating adipocytes, lymphocytic aggregates, and large septal masses of inflammatory cells and platelets were observed as defining features, and myofibrillar damage was evident in all patients. Collectively, COVID-19-associated cardiac injury was multifactorial, with elevated levels of NETs and von Willebrand factor as defining features of direct and indirect viral injury.

The Ganges is one of the largest river basins in the world with an area of 10,87,500 km 2. Waterr... more The Ganges is one of the largest river basins in the world with an area of 10,87,500 km 2. Waterrelated issues of the basin are due to both high and low flows and the problem will be more due to climate change. In this context, an attempted has been made in this paper to establish a basin scale hydrological model for the Ganges basin to predict the impact of climate change on water resources availability. A water balance model has been setup using physical based, semidistributed hydrological model SWAT. Temperature and precipitation data from 9 GCMs and two SRES scenarios (A1B and A2) are used along with various input data (e.g., DEM, land use/cover, soil type, weather). Besides, assessment of statistical confidence of the results from different GCM is done utilizing the non-parametric Mann-Whitney U test. It is found that the average annual flow generated from the Ganges basin is 361,593 Mm 3. The results also indicate that the water availability will decrease during dry period and increase during monsoon. The average annual flow volume increases 22% by 2030, 26% by 2050 and 19% by 2080 for A1B scenario. A similar situation is observed for A2 also.

Journal of Alloys and Compounds, 2015

Sn added bulk FeSe 0.5 Te 0.5 samples are synthesized through two-step solid state reaction route... more Sn added bulk FeSe 0.5 Te 0.5 samples are synthesized through two-step solid state reaction route. It is found that Sn addition can significantly enhance the transformation from the hexagonal phase to the superconducting tetragonal phase during the sintering process of FeSe 0.5 Te 0.5 samples due to the appearance of liquid Sn at low temperature. With increase of superconducting phase proportion as well as improvement of its crystallinity, 5 wt% Sn addition dramatically enhances the zero resistivity temperature (ܶ) by 3 K accompanying with a bit improvement in the onset temperature of superconducting transition (ܶ). From this view, our work suggests a new prospective that how to search proper dopant to further improving superconductivity in 11 type Fe based superconductors.

Antibiotics, 2022

There is an increasing focus on researching children admitted to hospital with new variants of CO... more There is an increasing focus on researching children admitted to hospital with new variants of COVID-19, combined with concerns with hyperinflammatory syndromes and the overuse of antimicrobials. Paediatric guidelines have been produced in Bangladesh to improve their care. Consequently, the objective is to document the management of children with COVID-19 among 24 hospitals in Bangladesh. Key outcome measures included the percentage prescribed different antimicrobials, adherence to paediatric guidelines and mortality rates using purposely developed report forms. The majority of 146 admitted children were aged 5 years or under (62.3%) and were boys (58.9%). Reasons for admission included fever, respiratory distress and coughing; 86.3% were prescribed antibiotics, typically parenterally, on the WHO ‘Watch’ list, and empirically (98.4%). There were no differences in antibiotic use whether hospitals followed paediatric guidance or not. There was no prescribing of antimalarials and limit...

The effect of gate length 8 nm with underlap of double gate MOSFET has been designed for VLSI Tec... more The effect of gate length 8 nm with underlap of double gate MOSFET has been designed for VLSI Technology. The evaluation process was followed by NEGF (non-equilibrium Green's function) formalism using SILVACO ATLAS followed to ITRS–2013. The investigations on the threshold voltage, Sub threshold Slope, I_ON, I_OFF, I_ON/ I_OFF, DIBL and switching characteristics of the electric field have been done with the simulation results. In the simulation, adopting symmetrical distances from source to gate and gate to drain (S-G and G-D) by fixing the gate length identical are cited as underlap. Here, the observation has been done for L_UN = (0 to 4 nm) underlap length. GaN and HfO₂ have chosen as channel material and dielectric material respectively. Proposed devices structure indicates that GaN- based DG-MOSFETs for L_G = 8 nm with var...

2019 IEEE International WIE Conference on Electrical and Computer Engineering (WIECON-ECE), 2019

Agriculture is a major sector for any developing country. As per Bangladesh’s perspective, it is ... more Agriculture is a major sector for any developing country. As per Bangladesh’s perspective, it is essential for us to focus on the Agriculture sector. In western or modern countries there had been a huge improvement in this sector by introducing modern automation techniques. Also, there is a need for a combination of electrical and agricultural scientists working together for development. The result of the combined work is called AGROBOT. The goal of the AGROBOT project is the implementation of a robotic system for agricultural operations such as plowing the field, sowing seeds, spraying fertilizers, nutrition deficiency and controlled use of fertilizers and pesticides. The agricultural scientists are experimenting to replace tractor driven mechanization with robotic agriculture by introducing “AGROBOT”. Electricity for this can be obtained from renewable energy resources like solar energy. Thus this robot is a clean energy-based farmer-friendly device. The main purpose of this project is to increase the productivity of agricultural land.

Bangladesh Heart Journal, 2016

Coronary artery disease (CAD) is a leading cause of morbidity and mortality worldwide, including ... more Coronary artery disease (CAD) is a leading cause of morbidity and mortality worldwide, including Bangladesh. Besides medical and interventional treatment, coronary artery bypass graft (CABG) surgery in an effective modality for the management of a subset of CAD patients. Off-pump coronary artery bypass graft (OPCAB) surgery is a recent modification of conventional CABG surgery, which, like other parts of the world, is being increasingly practiced in Bangladesh. But the outcome of this relatively recent surgical approach in our setting is largely unknown. In this study, the outcomes of 129 cases off-pump CABG surgery done in a tertiary cardiovascular centre and a private institute in Dhaka were analyzed. Majority (67, 54.2%) had triple vessel disease (TVD), while 4 (3.2%) patients had left main disease. One, two and three grafts were used in 17 (13.2%),74 (57.4%) and 38 (29.4%) cases respectively. There was no mortality. Post-operative complications occurred in 17 (13.18%) patients; secondary wound infection in 10 (7.75%) and immediate respiratory distress in 7 (5.43%) cases. Ten (7.75%) patients needed secondary stitches.

Bangladesh Heart Journal, 2016

Congenital heart diseases (CHDs) are a group of problems in the structure of the heart that is pr... more Congenital heart diseases (CHDs) are a group of problems in the structure of the heart that is present at birth. Signs and symptoms depend on the specific type of problem. Symptoms can vary from none to life-threatening. CHD is prevalent throughout the world including Bangladesh. It is the leading cause of birth defect-related death. Most of the patients with CHDs need corrective surgery and life-long follow up with heart care. In this series, 102 cases of CHD patients were operated, 82 of them were of atrial septal defect (ASD), 12 ventricular septal defect (VSD), 2 Tetralogy of Fallot (TOF) and 6 patent ductus arteriosus (PDA). Operative and post-operative periods were uneventful. There were no major complications including death.Bangladesh Heart Journal 2015; 30(2) : 58-60

Bangladesh Journal of Animal Science, 2014

This research was conducted to test the feasibility of using date palm(Phoenix dactylifera L.) br... more This research was conducted to test the feasibility of using date palm(Phoenix dactylifera L.) brown sugar as an alternative to refined cane sugar in preparing sweet dahi. Quality assessment tests were conducted on four different types of dahi prepared by adding different levels of date palm brown sugar, such as 10% (A), 12% (B), 14% (C) and 12% refined cane sugar (D, as control). All the samples were analyzed for organoleptic, chemical and microbiological qualities. The scores for smell and taste, body and texture, color and appearance, and total scores for four types of dahi samples showed significant differences at various levels (p<0.01 to p<0.05). It was found that scores for all the organoleptic parameters of sample B were the highest among the samples, whereas sample D obtained the lowest scores. Total viable count of bacteria and coliform count, and sugar content, ash content, and protein content were differed significantly (p<0.01). Contents for fat also sho...

2014 IEEE World Congress on Services, 2014

The demand for electronic medical data sharing is increasing due to treatment delays and increase... more The demand for electronic medical data sharing is increasing due to treatment delays and increased medication costs caused by data disorganization between healthcare providers. The integration of computer technology has met these challenges and revolutionized healthcare. Through cloud computing, data accessing from multiple locations has become easier. However, concerns about the protection of such private medical data have arisen as involuntary disclosure of this information can affect a patients personal life. Although considerable research has been done to solve this problem using a cloud brokerage system, numerous risks regarding this privacy violation problem remain. This paper aims to provide a security model for cloud data to facilitate the exchange of medical records with various institutes without privacy concerns. We demonstrate via experiment that our method yields greater performance than the existing technique.

Laboratory Investigation

As the coronavirus disease 2019 (COVID-19) pandemic evolves, much evidence implicates the heart a... more As the coronavirus disease 2019 (COVID-19) pandemic evolves, much evidence implicates the heart as a critical target of injury in patients. The mechanism(s) of cardiac involvement has not been fully elucidated, although evidence of direct virus-mediated injury, thromboembolism with ischemic complications, and cytokine storm has been reported. We examined suggested mechanisms of COVID-19-associated heart failure in 21 COVID-19-positive decedents, obtained through standard autopsy procedure, compared to clinically matched controls and patients with various etiologies of viral myocarditis. We developed a custom tissue microarray using regions of pathological interest and interrogated tissues via immunohistochemistry and in situ hybridization. Severe acute respiratory syndrome coronavirus 2 was detected in 16/21 patients, in cardiomyocytes, the endothelium, interstitial spaces, and percolating adipocytes within the myocardium. Virus detection typically corresponded with troponin depletion and increased cleaved caspase-3. Indirect mechanisms of injury-venous and arterial thromboses with associated vasculitis including a mixed inflammatory infiltrate-were also observed. Neutrophil extracellular traps (NETs) were present in the myocardium of all COVID-19 patients, regardless of injury degree. Borderline myocarditis (inflammation without associated myocyte injury) was observed in 19/ 21 patients, characterized by a predominantly mononuclear inflammatory infiltrate. Edema, inflammation of percolating adipocytes, lymphocytic aggregates, and large septal masses of inflammatory cells and platelets were observed as defining features, and myofibrillar damage was evident in all patients. Collectively, COVID-19-associated cardiac injury was multifactorial, with elevated levels of NETs and von Willebrand factor as defining features of direct and indirect viral injury.

The Ganges is one of the largest river basins in the world with an area of 10,87,500 km 2. Waterr... more The Ganges is one of the largest river basins in the world with an area of 10,87,500 km 2. Waterrelated issues of the basin are due to both high and low flows and the problem will be more due to climate change. In this context, an attempted has been made in this paper to establish a basin scale hydrological model for the Ganges basin to predict the impact of climate change on water resources availability. A water balance model has been setup using physical based, semidistributed hydrological model SWAT. Temperature and precipitation data from 9 GCMs and two SRES scenarios (A1B and A2) are used along with various input data (e.g., DEM, land use/cover, soil type, weather). Besides, assessment of statistical confidence of the results from different GCM is done utilizing the non-parametric Mann-Whitney U test. It is found that the average annual flow generated from the Ganges basin is 361,593 Mm 3. The results also indicate that the water availability will decrease during dry period and increase during monsoon. The average annual flow volume increases 22% by 2030, 26% by 2050 and 19% by 2080 for A1B scenario. A similar situation is observed for A2 also.

Journal of Alloys and Compounds, 2015

Sn added bulk FeSe 0.5 Te 0.5 samples are synthesized through two-step solid state reaction route... more Sn added bulk FeSe 0.5 Te 0.5 samples are synthesized through two-step solid state reaction route. It is found that Sn addition can significantly enhance the transformation from the hexagonal phase to the superconducting tetragonal phase during the sintering process of FeSe 0.5 Te 0.5 samples due to the appearance of liquid Sn at low temperature. With increase of superconducting phase proportion as well as improvement of its crystallinity, 5 wt% Sn addition dramatically enhances the zero resistivity temperature (ܶ) by 3 K accompanying with a bit improvement in the onset temperature of superconducting transition (ܶ). From this view, our work suggests a new prospective that how to search proper dopant to further improving superconductivity in 11 type Fe based superconductors.