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Prediction of Attention and Short-Term Memory Loss by EEG Workload Estimation

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Journal of Biosciences and Medicines 2023年第4期11卷 304-318页

作者： Md. Ariful Islam Ajay Krishno Sarkar Md. Imran Hossain Md. Tofail Ahmed A. H. M. Iftekharul ferdous Department of Electrical and Electronic Engineering Rajshshi University of Engineering and Technology Rajshshi Bangladesh Department of Electrical Electronic and Communication Engineering Pabna University of Science and Technology Pabna Bangladesh Department of Information and Communication Engineering Pabna University of Science and Technology Pabna Bangladesh Department of Electrical and Electronic Engineering Pabna University of Science and Technology Pabna Bangladesh

Mental workload plays a vital role in cognitive impairment. The impairment refers to a person’s difficulty in remembering, receiving new information, learning new things, concentrating, or making decisions that seriously affect everyday life. In this paper, the simultaneous capacity (SIMKAP) experiment-based EEG workload analysis was presented using 45 subjects for multitasking mental workload estimation with subject wise attention loss calculation as well as short term memory loss measurement. Using an open access preprocessed EEG dataset, Discrete wavelet transforms (DWT) was utilized for feature extraction and Minimum redundancy and maximum relevancy (MRMR) technique was used to select most relevance features. Wavelet decomposition technique was also used for decomposing EEG signals into five sub bands. Fourteen statistical features were calculated from each sub band signal to form a 5 × 14 window size. The Neural Network (Narrow) classification algorithm was used to classify dataset for low and high workload conditions and comparison was made using some other machine learning models. The results show the classifier’s accuracy of 86.7%, precision of 84.4%, F1 score of 86.33%, and recall of 88.37% that crosses the state-of-the art methodologies in the literature. This prediction is expected to greatly facilitate the improved way in memory and attention loss impairments assessment.

关键词： Attention Loss Cognitive Impairment EEG Feature Selection SIMKAP Short Term Memory Loss Machine Learning Workload

Performance Enhancement of CZTS Solar Cell with CuSbS₂ Back Surface Field: A Numerical Simulation Approach

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Engineering（科研） 2023年第9期15卷 497-513页

作者： Md. ferdous Wahid Nowshad Ahmed Md. Shahriar Rahman Abdullah Al Mamun Md. Nuralam Howlader Md. Motiur Rahman Tareq Department of Electrical and Electronic Engineering Hajee Mohammad Danesh Science and Technology University Dinajpur Bangladesh

Copper Zinc Tin Sulfide (CZTS) solar cell (SC) has garnered significant attention from researchers in recent years owing to its affordability, less toxic earth abundant constituents, remarkable conversion efficiency and promising prospects for the bulk manufacture of thin film solar cells. Moreover, CZTS exhibits a high absorption coefficient and possesses an optimal adjustable direct band gap, making it a promising candidate for various photovoltaic applications. Hence, in this study, a new configuration (CuSbS2/CZTS/CdS/i-ZnO/ Al: ZnO) is introduced for CZTS SC, which was simulated using SCAPS-1D. The utilization of CuSbS2 as the back surface field (BSF) and CdS as the buffer layer was investigated to enhance the performance of CZTS SC. Moreover, a comparative numerical analysis was carried out to contrast the SC configurations of CZTS/CdS/i-ZnO/Al: ZnO and CuSbS2/CZTS/CdS/i-ZnO/Al: ZnO. In this study, the impact on SC parameters such as open circuit voltage (Voc), short- circuit current density (Jsc), Fill-factor (FF), and Power Conversion Efficiency (PCE) by varying thickness, doping density, defect density of absorber and buffer layer, thickness and doping density of BSF, and operating temperature have been thoroughly investigated. The optimum structure consists of i-ZnO and Al: ZnO for the window layer, CdS for the buffer layer, CZTS for the absorber layer, and BSF layers with thicknesses of 50 nm, 200 nm, 50 nm, 2000 nm, and 50 nm, respectively. The designed SC with a BSF layer had a PCE of 28.76%, JSC of 32.53 mA/cm2, Voc of 1.01233 V, and FF of 87.35%. The structure without a BSF layer has a PCE of 24.21%, Voc of 0.898 V, JSC of 31.56 mA/cm2, and FF of 85.32%. Furthermore, an analysis of temperature, quantum efficiency (QE), C- V characteristics and the J-V curve was conducted, revealing the potential of CuSbS2 as a BSF and CdS

关键词： Solar Cell CZTS BSF Defect Density Doping Concentration SCAPS-1D

Acceptability and Compliance to a 10-Day Regimen of Zinc Treatment in Diarrhea in Rural Bangladesh

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Food and Nutrition Sciences 2013年第4期4卷 357-364页

作者： Shahnawaz Ahmed Dilruba Nasrin Farzana ferdous Fahmida Dil Farzana Guddu Kaur Mohammod Jobayer Chisti Sumon Kumar Das Abu Syed Golam Faruque Centre for Vaccine Development (CVD) University of Maryland School of Medicine Baltimore USA International Centre for Diarrheal Disease Research Dhaka Bangladesh University of Sydney Sydney Australia

We hypothesised that the promotion of blister packs of zinc may be carried out by health personnel in health care facilities to the mothers of children suffering from diarrhea. We predicted that good acceptability and good compliance to zinc treatment in rural Bangladesh would be over 75% and at least 60%, respectively. Between January and December 2011, six hundred and thirty five children aged 6 - 59 months who presented with acute diarrhea received a 10-day zinc regimen. Determination of acceptability and compliance of a dispersible zinc tablet in children 6 - 59 months old was main point of the study. In-home follow-ups started within 2 - 3 weeks after the regimen began. Seventy seven percent of the mothers/caretakers perceived that the taste of the zinc tablets was the same or better than that of other medicines given to their children and expressed willingness to use zinc in the future (good acceptability). Sixty-two percent of the children completed full 10-day course of zinc treatment by taking one tablet a day that had been completely dissolved in a small amount of water (good compliance). There was 63% excess risk for poor compliance to zinc if father stays at home with the family [OR = 1.63 (95%CI;1.09, 2.46) p = 0.019]. Despite vomiting, 33% children continued to receive zinc tablet [OR = 0.67 (95%CI;(0.47, 0.97, 0.032)] after adjusting for co-variates. Both acceptability and compliance to dispersible zinc tablets in childhood diarrheal illnesses are still not at the expected level in rural Bangladesh.

关键词： Acceptability Compliance Diarrhea Young Children Zinc

An overview of freshwater prawn fishery in Bangladesh:present status and future prospect

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Journal of Coastal Life Medicine 2014年第7期 580-588页

作者： ferdous Ahamed Bernerd Fulanda Muhammad Abu Bakar Siddik Md.Yeamin Hossain Md.Mostafizur Rahman Mondol Zoarder Faruque Ahmed Jun Ohtomi Department of Fisheries Management Patuakhali Science and Technology UniversityBangladesh Kenya Marine and Fisheries Research Institute Marine and CoastalP.O.Box 81651Mombasa 80100Kenya Department of Fisheries Biology and Genetics Patuakhali Science and Technology UniversityBangladesh Department of Fisheries Faculty of AgricultureUniversity of RajshahiRajshahi 6205Bangladesh Department of Fisheries Management Bangladesh Agricultural UniversityMymensingh 2202Bangladesh Faculty of Fisheries Kagoshima University4-50-20 ShimoarataKagoshima 890-0056Japan

The freshwater prawn fishery plays an important role in the economy of *** fishery is mainly based on the culture of Macrobrachium *** culture fishery has been growing rapidly,thus,masking the dwindling capture fishery which is faced with serious environmental issues augmented by deleterious fishing *** the high prospects of the freshwater prawn aquaculture in Bangladesh,a lot of research is needed to ensure the sustainable development of the capture fishery which forms a key source of prawn aquaculture seed as well as provide a baseline for future *** prawn aquaculture in Bangladesh is based on traditional methods with continuous adaptations by the rural ***,numerous constraints to its full development are evident at all stages of its *** of quality brood stock,seed,feeds and poor technical knowledge at farmers level are but some of the impediments challenging the sustainability of this *** paper reviews the freshwater prawn fishery of Bangladesh over the last few decades and outlines approaches for the development of an ecosystem-based management of both the culture and capture sectors of this important fishery.

关键词： Freshwater prawn fishery Aquaculture Economy Sustainable management Bangladesh

Bishop Koop conversion of temporary stoma can be an option to establish gut continuity early when primary anastomosis is not safe

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World Journal of Pediatric Surgery 2019年第2期2卷 16-19页

作者： Md Samiul Hasan Ashrarur Rahman Umama Huq Kazi Nur Ul ferdous Md Ayub Ali Pediatric Surgery Bangladesh Institute of Child Health(BICH)Dhaka Shishu(Children)HospitalDhakaBangladesh

background Intestinal perforation and sometimes obstruction in neonates demand diverting stomas which are associated with fluid,electrolytes and nutrient *** establishment of gut continuity is the key to the best outcome,though primary anastomosis is not always *** aim of this study was to evaluate the effectiveness of Bishop Koop stoma in establishing early continuity of gut and confirming the function of distal *** Data of patients who underwent Bishop Koop conversion of diverting stoma from July 2016 to June 2018 were reviewed *** and outcome data were recorded and analyzed using Statistical Package for the Social Science(SPSS)V.22 *** permission was taken from hospital ethical *** 29 patients were included(16 male and 13 female).Mean age of conversion was 5.8±2.5 months and mean weight was 4.9±*** bowel movement was established in 26 *** patient died of sepsis on sixth postoperative day and one had anastomotic *** was no significant difference with respect to outcome between perforation and obstruction *** Koop stomas were closed after 6 weeks of *** Bishop Koop conversion of temporary stoma was turned out as a good choice for these patients.

关键词： Bishop continuity establishing

Effects of Selective Biotinylation on the Thermodynamic Stability of Human Serum Albumin

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Journal of Biophysical Chemistry 2016年第1期7卷 9-29页

作者： Huyen Hoang Fidelis Manyanga Moshood K. Morakinyo Vincent Pinkert ferdous Sarwary Daniel J. Fish Greg P. Brewood Albert S. Benight Department of Chemistry Portland State University Portland USA Louisville Bioscience Inc. Louisville USA Department of Chemistry and Physics Salem State University Salem USA Portland Technology Development Intel Corporation Hillsboro USA Department of Mathematics Portland State University Portland USA Department of Physics Portland State University Portland USA

Thermal denaturation and stability of two commercially available preparations of Human Serum Albumin (HSA), differing in their advertised level of purity, were investigated by differential scanning calorimetry (DSC). These protein samples were 99% pure HSA (termed HSA99) and 96% pure HSA (termed HSA96). According to the supplier, the 3% difference in purity between HSA96 and HSA99 is primarily attributed to the presence of globulins and fatty acids. Our primary aim was to investigate the utility of DSC in discerning changes in HSA that occur when the protein is specifically adducted, and determine how adduct formation manifests itself in HSA denaturation curves, or thermograms, measured by DSC. Effects of site specific covalent attachment of biotin (the adduct) on the thermodynamic stability of HSA were investigated. Each of the HSA preparations was modified by biotinylation targeting a single site, or multiple sites on the protein structure. Thermograms of both modified and unmodified HSA samples successfully demonstrated the ability of DSC to clearly discern the two HSA preparations and the presence or absence of covalent modifications. DSC thermogram analysis also provided thermodynamic characterization of the different HSA samples of the study, which provided insight into how the two forms of HSA respond to covalent modification with biotin. Consistent with published studies [1] HSA96, the preparation with contaminants that contain globulins and fatty acids seems to be comprised of two forms, HSA96-L and HSA96-H, with HSA96-L more stable than HSA99. The effect of multisite biotinylation is to stabilize HSA96-L and destabilize HSA96-H. Thermodynamic analysis suggests that the binding of ligands comprising the fatty acid and globulin-like contaminant contributes approximately 6.7 kcal/mol to the stability HSA96-L.

关键词： Human Serum Albumin (HSA) Differential Scanning Calorimetryl (DSC) Protein Thermodynamic Stability and Thermal Denaturation

Prolonged acute diarrhea in adults: Decades of observation from epidemiological perspective in urban Bangladesh

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Open Journal of Gastroenterology 2013年第3期3卷 208-213页

作者： Sumon Kumar Das Mohammod Jobayer Chisti Shahnawaz Ahmed Mohammad Abdul Malek Fahmida Dil Farzana Farzana ferdous Jonathan Latham Abu Syed Golam Faruque Centre for Nutrition and Food Security (CNFS) International Centre for Diarrhoeal Disease Research Bangladesh (icddrb) Dhaka Bangladesh London School of Hygiene and Tropical Medicine London UK

The study aimed to determine the epidemiological, clinical characteristics, and etiology of adults aged ≥20 years presented with prolonged acute diarrhea (≥7 days). A total of 18,210 adults aged ≥20 years were enrolled in the Diarrheal Disease Surveillance System of icddr,b between 1993-2012 and included into the analysis. Of these, 17,631 (97%) had duration of diarrhea ≤6 days, 418 (2%) diarrhea presented with a duration of 7 - 13 days and rest 161 (1%) had history of diarrhea ≥14 days. A higher proportion of adult individuals who had duration of diarrhea ≥14 days (70% vs. 56%;p male. At least 73% of all patients used oral rehydration solution;but proportion was lower among prolonged acute diarrhea groups. Use of antimicrobials was higher among those with duration 7 - 13 days (81%) and ≥14 days (81%). Diarrhea lasting ≥14 days, 47% were suffering from chronic energy deficiency and 30% had history of smoking. Individuals with diarrhea ≥7 days less frequently presented with vomiting, watery stool, frequency of stool >10 times/24 hours, drowsy or lethargy, fast breathing, some or severe dehydration, received intravenous saline for initial corrections of dehydration and stayed for longer duration in hospital (≥24 hours) but more often presented with abdominal pain. Stool microscopic examination showed less frequent presence of red blood cells (36% vs. 44%;p = 0.043) and fecal leucocytes (50% vs. 59%;p = 0.029) among individuals with diarrhea ≥14 days compared to those with ≤6 days. None was infected with Vibrio cholerae (≥14 days) (3% for 7 - 13 days);however, isolation rate of Aeromonas was higher among adults with duration for ≥14 days (11%). Only 15% with ≥14 days were positive for Shigella contrary to 19% (7 - 13 days) and 56% (≤6 days). Differences in sociodemographic, clinical presentation and etiology varied with duration of diarrhea among adults.

关键词： Adult Bangladesh Diarrhea Prolonged Acute Diarrhea

Health and Nutritional Status of Young Foster Children Attending a Diarrhea Treatment Hospital in Bangladesh

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Food and Nutrition Sciences 2013年第8期4卷 785-790页

作者： Durdana Akhter Sumon Kumar Das Mohammod Jobayer Chisti Gazi Imran Fahmida Dil Farzana Shahnawaz Ahmed Farzana ferdous Mohammad Abdul Malek Abu Syed Golam Faruque Centre for Nutrition and Food Security (CNFS) icddrb Dhaka Bangladesh Centre for Vaccine Sciences (CVS) International Centre for Diarrhoeal Disease Research Bangladesh (icddrb) Dhaka Bangladesh Dhaka Shishu (Children’s) Hospital Dhaka Bangladesh

There is scarcity of evidence-based information about socio-demographic as well as ailment factors associated with foster children in Bangladesh. Thus the aim of the present study was to determine the socio-economic, health and nutritional status of young foster children in urban Dhaka. A total of 208 (1%;n = 208/28,948) under-5 foster children were enrolled in the Diarrheal Disease Surveillance System of icddr,b between 1993-2012. Randomly selected under-5 children (n = 624) with a ratio of 1:3 were extracted and constituted as comparison group. Forty-three percent (n = 90) foster children were male. Lack of formal schooling of mother was higher among foster children compared to non-foster children (52% vs. 35%;p < 0.001). Higher proportion of foster children suffered from some or severe dehy-dration (60% vs. 47%;p = 0.001) and often received intravenous saline (12% vs. 5%;p = 0.002) in comparison to non-foster children. Significantly lower proportion of foster children had rotavirus diarrhea (26% vs. 43%;p < 0.001). In multivariate analysis, foster children were 2 times (95% CI: 1.31-4.32) more likely to be stunted and 194 times (95% CI: 82.25-457.76) more likely to be non-breastfed. Infants aged 6-11 months were 8 times (95% CI: 3.70-15.50) more likely to be foster compared to older children and probability of fostering was 7 times (95% CI: 3.96-13.33) higher among mothers with a median age of 25 years. The findings of our study clearly demonstrate the existing health and nutritional problems of foster children. Therefore, appropriate health and nutrition interventions are critical for foster children in Bangladesh.

关键词： Bangladesh Diarrhea Foster Children Malnutrition

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Journal of Diabetes Mellitus 2022年第4期12卷 243-251页

作者： Md. Motiur Rahman Hafiza Sultana Farkhanda Mah Jebin Tanmoy Saha Wahida Yasmeen Foisal Mohammad Mosiul Alom Syeda Tahmina ferdous Jinia Syed Ahmed Laiak Ahammed Sheikh Sayera Khatun Medical College and Hospital Gopalganj Bangladesh National Institute of Preventive & Social Medicine (NIPSOM) Dhaka Bangladesh Khwaja Yunus Ali Medical College Sirajganj Bangladesh Tooth Fairy Foundation Dhaka Bangladesh Udayan Dental College Rajshahi Bangladesh National Institute of Traumatology and Orthopaedic Rehabilitation (NITOR) Dhaka Bangladesh Institute of Epidemiology Disease Control and Research (IEDCR) Dhaka Bangladesh Bangabandhu Sheikh Mujib Medical College Fraidpur Bangladesh

Introduction: The health related quality of life (HRQoL) has an important role in adults suffering from diabetes. Objective: To assess the health related quality of life in adult with type 2 diabetes mellitus. Materials and methods: A cross-sectional study was conducted to assess diabetic patient’s HRQoL on 119 purposively selected type-2 DM patients (aged ≥ 18 years and duration of diabetes ≥ 1 year). Data were collected by face-to-face interview and by medical record review through a Bangle version of SF-36 semi-structured questionnaire and a checklist. Place and period of study: The study was conducted at outpatient department in Gopalganj 50 bedded diabetic hospital from 1st January, 2018 to 31st December 2018. Results: The mean age of the respondents was 52.34 (SD ± 10.19) years. Age group shows a significant difference associated with all domains of quality of life except role emotion (>0.05), gender shows the significant in social and pain domain (0.05) respectively co-morbidity shows the significant difference with all domains expect pain (>0.05). Physical functioning, emotional, pain and general health of the quality of life show the significant difference associated with use of insulin (Conclusion: The overall QoL of type-2 DM patients was poor and had lower score of health related quality of life.

关键词： Type 2 Diabetes Mellitus Health Related Quality of Life Diabetes Mellitus