Zika virus (ZIKV) is an arboviral pathogen that belongs to the Flaviviridae subgroup and is a con... more Zika virus (ZIKV) is an arboviral pathogen that belongs to the Flaviviridae subgroup and is a contemporary global concern. Recent epidemic outbreaks in Brazil have indicated that ZIKV could be responsible for post-infection neurological disorders in infants, resulting in ZIKV being considered a major threat to global health. Unfortunately, no vaccine is yet available to prevent the spread of this virus. In this study, we have applied an in silico approach to the identification of B-cell epitopes in the ZIKV genome. By utilizing currently available genomic data and applying multiple sequence alignments and the Immune Epitope Database (IDEB) tools, a LEFYSYKKSG epitope was identified in a highly conserved peptide region of the ZIKV polyprotein. The antigenicity, allergenicity, and affinity of the B-cell epitope were evaluated, and significant B-cell affinity against ZIKV was identified. This highly conserved epitope can be used to develop a peptide-based vaccine and can also be applied toward the development of a monoclonal antibody (mAb) for therapeutic or diagnostic purposes against ZIKV.
International Journal of Medical and Health Research, 2020
Introduction: Gall stones are one of the major causes of morbidity and mortality all over the wor... more Introduction: Gall stones are one of the major causes of morbidity and mortality all over the world. Cholecystectomy is the definitive treatment for patients with acute cholecystitis. Objective: To compare the outcomes of early versus interval laparoscopic cholecystectomy in acute calculus cholecystitis. Methods: A total of 50 patients were chosen for the study. They were selected on the bases of presence of two of the following four features: (1) Abdominal pain characteristic of Acute Cholecystitis, (2) Positive Murphy's sign, (3) Total Leucocyte Count>10,000/ uL, and (4) Ultrasonographic evidence of Acute Calculus Cholecystitis.
The current paper presents a brief survey study on recent works on Nasr's eco-religious thoug... more The current paper presents a brief survey study on recent works on Nasr's eco-religious thought and approach. The paper aims to analyse these works critically to focus how and up to what level their discussions can match with Nasr's original understanding. The research methodology is basically literature review with textual analysis. In so doing, the article attempts to enrich the present discussion on Nasr's eco-religious vision. Keywords: Eco-philosophy, Eco-spirituality, Perennial philosophy, Seyyed Hossein Nasr, Sacredness of Nature, Sanctity of life. Abstrak Sebahagian cendiakawan berminat mempelajari pemikiran tradisional Seyyed Hossein Nasr mengenai persekitaran. Karya-karya mereka membantu tersebarnya pemikiran eko-agama Nasr secara penghargaan dan juga kritikan. Artikel ini mengkaji karya-karya terbaru mereka mengenai pemikiran dan pendekatan eko-agama Nasr untuk melihat sejauh mana karya-karya ini dapat disesuaikan dengan pemikirannya yang sebenar. Kaedah yang...
2019 8th International Conference System Modeling and Advancement in Research Trends (SMART), 2019
Toxic comment classification problem is a popular classification problem nowadays. There are many... more Toxic comment classification problem is a popular classification problem nowadays. There are many attempts in English but it's rare in Bangla language. We tried to build a classifier for Bangla language. We tried different approach to find the optimized classifier with better accuracy and optimized for log-loss, hamming-loss. As this is a multilevel problem, we used binary relevance methods for binary classifiers.
Fish and fish oil is the major source of polyunsaturated fatty acids (PUFA). These PUFA are vario... more Fish and fish oil is the major source of polyunsaturated fatty acids (PUFA). These PUFA are variously important for human health. In this experiment, the most cheap and fatty fish species was used for the extraction and identification of PUFA using soxhlet extraction method and gas chromatography (GC) analysis revealed that 0.80%, 2.48% EPA and DHA were present in the test sample, respectively. The level of different fatty acid content range between 0.03% to 22.6%. Therefore, the objective of this study was to extraction and identification of PUFA from the cheaply available catfish waste part (skin) for the rural poor Bangladeshi.
Background: Tuberculosis (TB) is the second leading cause of human death and TB is one of the maj... more Background: Tuberculosis (TB) is the second leading cause of human death and TB is one of the major public health problems in Bangladesh. The aim of the present study was to assess the Knowledge about TB among non-medical university students in Bangladesh. Methods: A cross-sectional survey was performed on 839 non-medical university students. Data were collected from University of Rajshahi from March to August 2013 using a standard semi-structured questionnaire. Chi-square test was utilized to find the factors which are associated with students ’ knowledge about TB. Results: Among 839 students, male and female were 68.2 % and 31.8 % respectively. Most of the students (94.4 %) were informed about the term TB, among them 50 % got information from electronic media. More than 50 % students believed that TB is a communicable disease, 42.8 % students agreed that bacteria is an agent for TB, most of the subjects (93 %) had the knowledge about the vaccination against TB and 97.6 % students ...
EMITTER International Journal of Engineering Technology, 2021
Human Activity Recognition (HAR), a vast area of a computer vision research, has gained standings... more Human Activity Recognition (HAR), a vast area of a computer vision research, has gained standings in recent years due to its applications in various fields. As human activity has diversification in action, interaction, and it embraces a large amount of data and powerful computational resources, it is very difficult to recognize human activities from an image. In order to solve the computational cost and vanishing gradient problem, in this work, we have proposed a revised simple convolutional neural network (CNN) model named Human Activity Recognition Network (HActivityNet) that is automatically extract and learn features and recognize activities in a rapid, precise and consistent manner. To solve the problem of imbalanced positive and negative data, we have created two datasets, one is HARDataset1 dataset which is created by extracted image frames from KTH dataset, and another one is HARDataset2 dataset prepared from activity video frames performed by us. The comprehensive experimen...
Encyclopedia of Renewable and Sustainable Materials, 2020
Abstract With the aim of giving a synopsis of the development of natural renewable textile materi... more Abstract With the aim of giving a synopsis of the development of natural renewable textile materials, this article first looks at the classification of textile materials and identifies the natural renewable materials that exist in the textile world. It explores different application domains of wearable and non-wearable textiles and their sources, and briefly discusses the processing technologies of different natural textile materials. Plant based textiles are predominantly cellulosic in nature while, animal based ones are based on protein chemistry. Only fibre that comes from minerals is known as asbestos, which is banned in many countries due to the health hazard it can cause. A subgroup within the manufactured fibres is natural polymers, which are regenerated from natural resources. They can be considered as “semi-natural” fibres and are also briefly touched in this article as some of the innovations of achieving novel renewable textile materials are heading towards this direction. A comparison of properties of the natural fibres was made using the Ashby charts to give some guidance on its applicability as textile materials. A Product Life Cycle (PLC) analysis of the natural fibres was also discussed and the current developments and future trends in the applications of natural fibres in real life are presented.
This chapter describes some exemplary Islamic teachings about public health issues and identifies... more This chapter describes some exemplary Islamic teachings about public health issues and identifies certain Islamic health values. It briefly provides an account of the ongoing health problems of South Asia, focusing on the context of Bangladesh with special attention to a significant role of Islamic faith-based organizations in the promotion of health and well-being for the Bangladeshi people. Finally, it provides some suggestions on how faith-based organizations can contribute to public health more effectively if they are supported by the government and other donor agencies.
The report is prepared on the basis of peat exploration at 4000 hectre areas of Bijoynagar Upazil... more The report is prepared on the basis of peat exploration at 4000 hectre areas of Bijoynagar Upazila at B’Baria district which is in the north-eastern part of Bangladesh. It has been studied extensively for the exploration of peat resources, particularly areal extent, reserve, quality and their condition of deposition. Nine peat bearing areas were identified in the studied area are covering six unions of Paharpur, Haraspur, and Chompoknagar and Uttar Singair beel. Peat was randomly found in surface to near surface at different places of investigated area. The total reserve of peat is about 32.61 million tons in wet condition or 13.044 million tons in dry condition. The chemical analysis of the peat shows average fixed carbon-20.5%, Ash content-32% and calorific value-7000 B.T.U. The quality of this peat is good. Geology, tectonics and environment of any area are controlling parameter for peat deposition. Fluvial and deltaic plain with area of active subsidence are suitable for peat de...
Diabetic people remain concern about their increased blood glucose level. The control of blood gl... more Diabetic people remain concern about their increased blood glucose level. The control of blood glucose is associated with several social, demographical, behavioral and biomedical factors. The aim of the study was to determine the factors influencing the control of diabetes. A cross-sectional survey was performed to select 300 diabetic patients using systematic random sampling methodology in Rajshahi city of Bangladesh. Chi-square test and stepwise logistic regression analysis were used to find out the associations of diabetes controlled and selected factors for this study. In this study, around 82.0% patients could control diabetes. Using chi-square test, sex, education, monthly family income, regular intake of drug, regular treatment receive, vertigo and HBP were associated with diabetes control. Multivariable logistic regression model suggested that sex, duration of carrying diabetes, regular intake of drugs, regular treatment receives, regular physical, vertigo and HBP activity h...
IEEE Transactions on Antennas and Propagation, 2020
A method to realize low-cost, optically transparent, flexible and unidirectional antennas is pres... more A method to realize low-cost, optically transparent, flexible and unidirectional antennas is presented in this paper. The key to the method is making a flexible transparent reflector made using a new method-injection of pure water into a flexible transparent cavity that is made out of Polydimethylsiloxane (PDMS) polymer and integrating the flexible reflector with a flexible dipole made of transparent conducting mesh. This method is simple and inexpensive. Hence, it is useful for large scale production of transparent, flexible, robust and low-cost antennas as well as RF/microwave components for wearable body-area networks and other such systems that require flexible and transparent components. To validate the method, an antenna operating in the 2.45 GHz band was designed, fabricated and tested under various conditions. Its measured gain is 3.2 dBi and efficiency is 51%. To the best of our knowledge, this is the first water-based transparent flexible antenna. Due to the shielding effect of the water-based reflector, it produces low SAR in the human body when it is worn, as expected from a unidirectional antenna. Further, it is investigated and confirmed that the use of pure water in the reflector makes the antenna significantly more efficient as opposed to salt water.
International Journal of Statistics in Medical Research, 2021
Background: Early marriage and early pregnancy is a social as well as a medical problem in develo... more Background: Early marriage and early pregnancy is a social as well as a medical problem in developing countries, which may have an impact on the health and nutritional status of teenage mothers. Therefore, the objective of this study was to determine the influencing factors of early childbearing (ECB) and its consequences on the nutritional status of Bangladeshi mothers. Methods: Data was extracted from Bangladesh Demographic and Health Survey (BDHS-2014). Women who delivered their first baby before the age of 20 years are considered ECB mothers. Nutritional status was measured by body mass index (BMI). Chi-square test and both univariable and multivariable logistic regressions, and z-proportional test were used in this study. Results: The prevalence of ECB among currently non-pregnant mothers in Bangladesh was 83%. The logistic regression model provided the following six risk factors of ECB: (i) living location (division) (p<0.01), (ii) respondents’ education (p<0.05), (iii) ...
Introduction: Multi-drug resistant tuberculosis (MDR-TB) is a public health crisis throughout the... more Introduction: Multi-drug resistant tuberculosis (MDR-TB) is a public health crisis throughout the world including Bangladesh particularly due to its complexities in diagnosis, longer treatment regimen, and adverse drug reaction. Nutritional supplementation has significant impact on patient's weigh gain and optimum weight gain is a biomarker of treatment response. The objective of this study was to measure body mass index (BMI) progress among MDR-TB patients in different phases of treatment. Methodology: A prospective observational study was conducted from March 2010 to July 2015 in Chest Disease Hospital (CDH), Rajshahi and different communities of Rajshahi Division, Bangladesh. A total of 233 confirmed MDR-TB patients were selected from CDH who received treatment and nutritional support from ongoing national TB control program (NTP). They received free diagnosis, follow up tests, treatment and nutritional support as regular diet as well as cash amount Bangladeshi taka (BDT.) 1000 per month in CDH. Along with treatment, they also received only cash amount BDT. 1500 per month as nutritional support at community level. Weight measurement was taken at regular interval from enrollment to completion of treatment. Chi-square, paired t-test and linear regression analysis were used in this study. Results: The baseline prevalence of undernourished (BMI < 18.5 kg/m 2) was 82.4%. After two months of treatment, 14.5% underweight patients gained weight and reverted to normal BMI. Regression analysis showed the decreasing tendency of BMI progress with increasing age which was significant among male patients (p < 0.05). We observed reversely that patients gained more BMI in intensive phase than continuation phase of treatment.
IEEE Transactions on Antennas and Propagation, 2019
He held a research associate position at the Reconfigurable Electronics and Antennas Research Gro... more He held a research associate position at the Reconfigurable Electronics and Antennas Research Group, Macquarie University. He is currently a Lecturer with the School of Engineering, Macquarie University. He has authored over 40 refereed journal and conference publications. He is an Inventor of two patent applications. His current research interests include EBG structures and their use in electromagnetic applications, EBG resonator antennas, FSS, wideband directive antennas, ultrawideband antennas, and antennas for biomedical applications.
Journal of Islam in Asia <span style="font-size: 0.6em">(E-ISSN: 2289-8077)</span>, 2018
The present paper attempts to expose how the scientific world-view of nature contributes to the p... more The present paper attempts to expose how the scientific world-view of nature contributes to the present environmental crisis. Alongside this, it relates European Renaissance, humanism, secularism, the scientific and industrial revolutions, modern philosophy, scientism, technology-based modern life, consumerism-based modern society, etc. with current environmental problems. By focusing on Nasr’s traditional understanding of nature, the paper explores how materialistic and mechanistic world-views are deeply connected with the present ecological crisis. It also offers a critical analysis of Nasr’s spiritual and religious world-view of nature and examines its relevance. In doing so, it aims to highlight some demerits of the present world-view, and to call to reform current perceptions of nature by revitalizing traditional wisdom in order to protect the environment from further degradation. Thus, the paper is scholarly addition to the ongoing discourse on the issue of religions and the e...
Diabetes is associated with obesity, generally accompanied by a chronic state of oxidative stress... more Diabetes is associated with obesity, generally accompanied by a chronic state of oxidative stress and redox imbalances which are implicated in the progression of micro- and macro-complications like heart disease, stroke, dementia, cancer, kidney failure and blindness. All these complications rise primarily due to consistent high blood glucose levels. Insulin and glucagon help to maintain the homeostasis of glucose and lipids through signaling cascades. Pancreatic hormones stimulate translocation of the glucose transporter isoform 4 (GLUT4) from an intracellular location to the cell surface and facilitate the rapid insulin-dependent storage of glucose in muscle and fat cells. Malfunction in glucose uptake mechanisms, primarily contribute to insulin resistance in type 2 diabetes. Plant secondary metabolites, commonly known as phytochemicals, are reported to have great benefits in the management of type 2 diabetes. The role of phytochemicals and their action on insulin signaling pathwa...
Electrostatic Precipitators (ESP) are the most reliable and industrially used control devices to ... more Electrostatic Precipitators (ESP) are the most reliable and industrially used control devices to capture fine particles for reducing exhaust emission. Its efficiency is 99% or more. However, capturing submicron particles which are hazardous is still a problem as it involves complex flow phenomena and ESP design limitations. In this study, the effect of baffles on flow distribution inside the ESP is investigated computationally. Baffles are expected to increase the residence time of flue gas which helps to collect more particles into the collector plates, and hence increase the collection efficiency of an ESP. Besides, the placement of a baffle is likely to cause swirling of flue gas and hence sub-micron particles move towards the collector plate due to eccentric and electrostatic force. Therefore, the effects of position, shape and thickness of the baffles on collection efficiency which are also important for ESP design are reported in this study. The fluid flow distribution has been modelled using computational fluid dynamics (CFD) software Fluent and the result and outcome are presented and discussed. The result shows that baffles have significant influence on fluid flow pattern and the efficiency of ESP.
Zika virus (ZIKV) is an arboviral pathogen that belongs to the Flaviviridae subgroup and is a con... more Zika virus (ZIKV) is an arboviral pathogen that belongs to the Flaviviridae subgroup and is a contemporary global concern. Recent epidemic outbreaks in Brazil have indicated that ZIKV could be responsible for post-infection neurological disorders in infants, resulting in ZIKV being considered a major threat to global health. Unfortunately, no vaccine is yet available to prevent the spread of this virus. In this study, we have applied an in silico approach to the identification of B-cell epitopes in the ZIKV genome. By utilizing currently available genomic data and applying multiple sequence alignments and the Immune Epitope Database (IDEB) tools, a LEFYSYKKSG epitope was identified in a highly conserved peptide region of the ZIKV polyprotein. The antigenicity, allergenicity, and affinity of the B-cell epitope were evaluated, and significant B-cell affinity against ZIKV was identified. This highly conserved epitope can be used to develop a peptide-based vaccine and can also be applied toward the development of a monoclonal antibody (mAb) for therapeutic or diagnostic purposes against ZIKV.
International Journal of Medical and Health Research, 2020
Introduction: Gall stones are one of the major causes of morbidity and mortality all over the wor... more Introduction: Gall stones are one of the major causes of morbidity and mortality all over the world. Cholecystectomy is the definitive treatment for patients with acute cholecystitis. Objective: To compare the outcomes of early versus interval laparoscopic cholecystectomy in acute calculus cholecystitis. Methods: A total of 50 patients were chosen for the study. They were selected on the bases of presence of two of the following four features: (1) Abdominal pain characteristic of Acute Cholecystitis, (2) Positive Murphy&#39;s sign, (3) Total Leucocyte Count&gt;10,000/ uL, and (4) Ultrasonographic evidence of Acute Calculus Cholecystitis.
The current paper presents a brief survey study on recent works on Nasr's eco-religious thoug... more The current paper presents a brief survey study on recent works on Nasr's eco-religious thought and approach. The paper aims to analyse these works critically to focus how and up to what level their discussions can match with Nasr's original understanding. The research methodology is basically literature review with textual analysis. In so doing, the article attempts to enrich the present discussion on Nasr's eco-religious vision. Keywords: Eco-philosophy, Eco-spirituality, Perennial philosophy, Seyyed Hossein Nasr, Sacredness of Nature, Sanctity of life. Abstrak Sebahagian cendiakawan berminat mempelajari pemikiran tradisional Seyyed Hossein Nasr mengenai persekitaran. Karya-karya mereka membantu tersebarnya pemikiran eko-agama Nasr secara penghargaan dan juga kritikan. Artikel ini mengkaji karya-karya terbaru mereka mengenai pemikiran dan pendekatan eko-agama Nasr untuk melihat sejauh mana karya-karya ini dapat disesuaikan dengan pemikirannya yang sebenar. Kaedah yang...
2019 8th International Conference System Modeling and Advancement in Research Trends (SMART), 2019
Toxic comment classification problem is a popular classification problem nowadays. There are many... more Toxic comment classification problem is a popular classification problem nowadays. There are many attempts in English but it's rare in Bangla language. We tried to build a classifier for Bangla language. We tried different approach to find the optimized classifier with better accuracy and optimized for log-loss, hamming-loss. As this is a multilevel problem, we used binary relevance methods for binary classifiers.
Fish and fish oil is the major source of polyunsaturated fatty acids (PUFA). These PUFA are vario... more Fish and fish oil is the major source of polyunsaturated fatty acids (PUFA). These PUFA are variously important for human health. In this experiment, the most cheap and fatty fish species was used for the extraction and identification of PUFA using soxhlet extraction method and gas chromatography (GC) analysis revealed that 0.80%, 2.48% EPA and DHA were present in the test sample, respectively. The level of different fatty acid content range between 0.03% to 22.6%. Therefore, the objective of this study was to extraction and identification of PUFA from the cheaply available catfish waste part (skin) for the rural poor Bangladeshi.
Background: Tuberculosis (TB) is the second leading cause of human death and TB is one of the maj... more Background: Tuberculosis (TB) is the second leading cause of human death and TB is one of the major public health problems in Bangladesh. The aim of the present study was to assess the Knowledge about TB among non-medical university students in Bangladesh. Methods: A cross-sectional survey was performed on 839 non-medical university students. Data were collected from University of Rajshahi from March to August 2013 using a standard semi-structured questionnaire. Chi-square test was utilized to find the factors which are associated with students ’ knowledge about TB. Results: Among 839 students, male and female were 68.2 % and 31.8 % respectively. Most of the students (94.4 %) were informed about the term TB, among them 50 % got information from electronic media. More than 50 % students believed that TB is a communicable disease, 42.8 % students agreed that bacteria is an agent for TB, most of the subjects (93 %) had the knowledge about the vaccination against TB and 97.6 % students ...
EMITTER International Journal of Engineering Technology, 2021
Human Activity Recognition (HAR), a vast area of a computer vision research, has gained standings... more Human Activity Recognition (HAR), a vast area of a computer vision research, has gained standings in recent years due to its applications in various fields. As human activity has diversification in action, interaction, and it embraces a large amount of data and powerful computational resources, it is very difficult to recognize human activities from an image. In order to solve the computational cost and vanishing gradient problem, in this work, we have proposed a revised simple convolutional neural network (CNN) model named Human Activity Recognition Network (HActivityNet) that is automatically extract and learn features and recognize activities in a rapid, precise and consistent manner. To solve the problem of imbalanced positive and negative data, we have created two datasets, one is HARDataset1 dataset which is created by extracted image frames from KTH dataset, and another one is HARDataset2 dataset prepared from activity video frames performed by us. The comprehensive experimen...
Encyclopedia of Renewable and Sustainable Materials, 2020
Abstract With the aim of giving a synopsis of the development of natural renewable textile materi... more Abstract With the aim of giving a synopsis of the development of natural renewable textile materials, this article first looks at the classification of textile materials and identifies the natural renewable materials that exist in the textile world. It explores different application domains of wearable and non-wearable textiles and their sources, and briefly discusses the processing technologies of different natural textile materials. Plant based textiles are predominantly cellulosic in nature while, animal based ones are based on protein chemistry. Only fibre that comes from minerals is known as asbestos, which is banned in many countries due to the health hazard it can cause. A subgroup within the manufactured fibres is natural polymers, which are regenerated from natural resources. They can be considered as “semi-natural” fibres and are also briefly touched in this article as some of the innovations of achieving novel renewable textile materials are heading towards this direction. A comparison of properties of the natural fibres was made using the Ashby charts to give some guidance on its applicability as textile materials. A Product Life Cycle (PLC) analysis of the natural fibres was also discussed and the current developments and future trends in the applications of natural fibres in real life are presented.
This chapter describes some exemplary Islamic teachings about public health issues and identifies... more This chapter describes some exemplary Islamic teachings about public health issues and identifies certain Islamic health values. It briefly provides an account of the ongoing health problems of South Asia, focusing on the context of Bangladesh with special attention to a significant role of Islamic faith-based organizations in the promotion of health and well-being for the Bangladeshi people. Finally, it provides some suggestions on how faith-based organizations can contribute to public health more effectively if they are supported by the government and other donor agencies.
The report is prepared on the basis of peat exploration at 4000 hectre areas of Bijoynagar Upazil... more The report is prepared on the basis of peat exploration at 4000 hectre areas of Bijoynagar Upazila at B’Baria district which is in the north-eastern part of Bangladesh. It has been studied extensively for the exploration of peat resources, particularly areal extent, reserve, quality and their condition of deposition. Nine peat bearing areas were identified in the studied area are covering six unions of Paharpur, Haraspur, and Chompoknagar and Uttar Singair beel. Peat was randomly found in surface to near surface at different places of investigated area. The total reserve of peat is about 32.61 million tons in wet condition or 13.044 million tons in dry condition. The chemical analysis of the peat shows average fixed carbon-20.5%, Ash content-32% and calorific value-7000 B.T.U. The quality of this peat is good. Geology, tectonics and environment of any area are controlling parameter for peat deposition. Fluvial and deltaic plain with area of active subsidence are suitable for peat de...
Diabetic people remain concern about their increased blood glucose level. The control of blood gl... more Diabetic people remain concern about their increased blood glucose level. The control of blood glucose is associated with several social, demographical, behavioral and biomedical factors. The aim of the study was to determine the factors influencing the control of diabetes. A cross-sectional survey was performed to select 300 diabetic patients using systematic random sampling methodology in Rajshahi city of Bangladesh. Chi-square test and stepwise logistic regression analysis were used to find out the associations of diabetes controlled and selected factors for this study. In this study, around 82.0% patients could control diabetes. Using chi-square test, sex, education, monthly family income, regular intake of drug, regular treatment receive, vertigo and HBP were associated with diabetes control. Multivariable logistic regression model suggested that sex, duration of carrying diabetes, regular intake of drugs, regular treatment receives, regular physical, vertigo and HBP activity h...
IEEE Transactions on Antennas and Propagation, 2020
A method to realize low-cost, optically transparent, flexible and unidirectional antennas is pres... more A method to realize low-cost, optically transparent, flexible and unidirectional antennas is presented in this paper. The key to the method is making a flexible transparent reflector made using a new method-injection of pure water into a flexible transparent cavity that is made out of Polydimethylsiloxane (PDMS) polymer and integrating the flexible reflector with a flexible dipole made of transparent conducting mesh. This method is simple and inexpensive. Hence, it is useful for large scale production of transparent, flexible, robust and low-cost antennas as well as RF/microwave components for wearable body-area networks and other such systems that require flexible and transparent components. To validate the method, an antenna operating in the 2.45 GHz band was designed, fabricated and tested under various conditions. Its measured gain is 3.2 dBi and efficiency is 51%. To the best of our knowledge, this is the first water-based transparent flexible antenna. Due to the shielding effect of the water-based reflector, it produces low SAR in the human body when it is worn, as expected from a unidirectional antenna. Further, it is investigated and confirmed that the use of pure water in the reflector makes the antenna significantly more efficient as opposed to salt water.
International Journal of Statistics in Medical Research, 2021
Background: Early marriage and early pregnancy is a social as well as a medical problem in develo... more Background: Early marriage and early pregnancy is a social as well as a medical problem in developing countries, which may have an impact on the health and nutritional status of teenage mothers. Therefore, the objective of this study was to determine the influencing factors of early childbearing (ECB) and its consequences on the nutritional status of Bangladeshi mothers. Methods: Data was extracted from Bangladesh Demographic and Health Survey (BDHS-2014). Women who delivered their first baby before the age of 20 years are considered ECB mothers. Nutritional status was measured by body mass index (BMI). Chi-square test and both univariable and multivariable logistic regressions, and z-proportional test were used in this study. Results: The prevalence of ECB among currently non-pregnant mothers in Bangladesh was 83%. The logistic regression model provided the following six risk factors of ECB: (i) living location (division) (p<0.01), (ii) respondents’ education (p<0.05), (iii) ...
Introduction: Multi-drug resistant tuberculosis (MDR-TB) is a public health crisis throughout the... more Introduction: Multi-drug resistant tuberculosis (MDR-TB) is a public health crisis throughout the world including Bangladesh particularly due to its complexities in diagnosis, longer treatment regimen, and adverse drug reaction. Nutritional supplementation has significant impact on patient's weigh gain and optimum weight gain is a biomarker of treatment response. The objective of this study was to measure body mass index (BMI) progress among MDR-TB patients in different phases of treatment. Methodology: A prospective observational study was conducted from March 2010 to July 2015 in Chest Disease Hospital (CDH), Rajshahi and different communities of Rajshahi Division, Bangladesh. A total of 233 confirmed MDR-TB patients were selected from CDH who received treatment and nutritional support from ongoing national TB control program (NTP). They received free diagnosis, follow up tests, treatment and nutritional support as regular diet as well as cash amount Bangladeshi taka (BDT.) 1000 per month in CDH. Along with treatment, they also received only cash amount BDT. 1500 per month as nutritional support at community level. Weight measurement was taken at regular interval from enrollment to completion of treatment. Chi-square, paired t-test and linear regression analysis were used in this study. Results: The baseline prevalence of undernourished (BMI < 18.5 kg/m 2) was 82.4%. After two months of treatment, 14.5% underweight patients gained weight and reverted to normal BMI. Regression analysis showed the decreasing tendency of BMI progress with increasing age which was significant among male patients (p < 0.05). We observed reversely that patients gained more BMI in intensive phase than continuation phase of treatment.
IEEE Transactions on Antennas and Propagation, 2019
He held a research associate position at the Reconfigurable Electronics and Antennas Research Gro... more He held a research associate position at the Reconfigurable Electronics and Antennas Research Group, Macquarie University. He is currently a Lecturer with the School of Engineering, Macquarie University. He has authored over 40 refereed journal and conference publications. He is an Inventor of two patent applications. His current research interests include EBG structures and their use in electromagnetic applications, EBG resonator antennas, FSS, wideband directive antennas, ultrawideband antennas, and antennas for biomedical applications.
Journal of Islam in Asia <span style="font-size: 0.6em">(E-ISSN: 2289-8077)</span>, 2018
The present paper attempts to expose how the scientific world-view of nature contributes to the p... more The present paper attempts to expose how the scientific world-view of nature contributes to the present environmental crisis. Alongside this, it relates European Renaissance, humanism, secularism, the scientific and industrial revolutions, modern philosophy, scientism, technology-based modern life, consumerism-based modern society, etc. with current environmental problems. By focusing on Nasr’s traditional understanding of nature, the paper explores how materialistic and mechanistic world-views are deeply connected with the present ecological crisis. It also offers a critical analysis of Nasr’s spiritual and religious world-view of nature and examines its relevance. In doing so, it aims to highlight some demerits of the present world-view, and to call to reform current perceptions of nature by revitalizing traditional wisdom in order to protect the environment from further degradation. Thus, the paper is scholarly addition to the ongoing discourse on the issue of religions and the e...
Diabetes is associated with obesity, generally accompanied by a chronic state of oxidative stress... more Diabetes is associated with obesity, generally accompanied by a chronic state of oxidative stress and redox imbalances which are implicated in the progression of micro- and macro-complications like heart disease, stroke, dementia, cancer, kidney failure and blindness. All these complications rise primarily due to consistent high blood glucose levels. Insulin and glucagon help to maintain the homeostasis of glucose and lipids through signaling cascades. Pancreatic hormones stimulate translocation of the glucose transporter isoform 4 (GLUT4) from an intracellular location to the cell surface and facilitate the rapid insulin-dependent storage of glucose in muscle and fat cells. Malfunction in glucose uptake mechanisms, primarily contribute to insulin resistance in type 2 diabetes. Plant secondary metabolites, commonly known as phytochemicals, are reported to have great benefits in the management of type 2 diabetes. The role of phytochemicals and their action on insulin signaling pathwa...
Electrostatic Precipitators (ESP) are the most reliable and industrially used control devices to ... more Electrostatic Precipitators (ESP) are the most reliable and industrially used control devices to capture fine particles for reducing exhaust emission. Its efficiency is 99% or more. However, capturing submicron particles which are hazardous is still a problem as it involves complex flow phenomena and ESP design limitations. In this study, the effect of baffles on flow distribution inside the ESP is investigated computationally. Baffles are expected to increase the residence time of flue gas which helps to collect more particles into the collector plates, and hence increase the collection efficiency of an ESP. Besides, the placement of a baffle is likely to cause swirling of flue gas and hence sub-micron particles move towards the collector plate due to eccentric and electrostatic force. Therefore, the effects of position, shape and thickness of the baffles on collection efficiency which are also important for ESP design are reported in this study. The fluid flow distribution has been modelled using computational fluid dynamics (CFD) software Fluent and the result and outcome are presented and discussed. The result shows that baffles have significant influence on fluid flow pattern and the efficiency of ESP.
Uploads
Papers by Abu Sayem