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Blockchain-based COVID vaccination registration and monitoring

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Blockchain(Research and Applications) 2022年第4期3卷 44-55页

作者： Shirajus Salekin Nabil md.Sabbir Alam Pran Ali Abrar Al haque Narayan Ranjan Chakraborty Mohammad Jabed Morshed Chowdhury md.Sadek Ferdous Daffodil International University Dhaka1207Bangladesh La Trobe University VIC3086Australia BRAC University Dhaka1212Bangladesh

COVID-19 has changed almost all aspects of our *** around the world have imposed lockdowns to slow down the ***,we have found the vaccine,in fact,a good number of ***,managing the testing and vaccination process of the total population is a mammoth ***,there are always delays or data silo problems in multi-organizational ***,streamlining this process is vital to improve efficiency and save more *** of its effective data sharing mechanism among different entities with a number of security features,blockchain can be an effective tool for different applications in the health ***,blockchain provides a distributed system along with greater privacy,transparency,and *** this article,we have presented a blockchain-based system that seamlessly integrates testing and vaccination systems,allowing the system to be *** instant verification of any tamper-proof COVID-19 test result has been developed,which will serve as“Test Certificates”.A transparent and efficient vaccination system has also been exhibited and implemented as the“Digital Vaccine Passport”(DVP)*** infection rate-based prioritization will ensure a transparent and fair vaccination process as well as tackle the distribution issue of the limited amount of *** comparative review with other existing works is also discussed,highlighting a clear difference from the existing *** proposed system is distinctive on the basis of prioritization of vaccines and seamless integration of test certificates and vaccine passports,which will aid in controlling the pandemic *** system will also be handy in the case of tackling any future pandemics initially.

关键词： COVID-19 Blockchain Solidity Digital vaccine passport Vaccination

Wireless Body Area Network: An Overview and Various Applications

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Journal of Computer and Communications 2017年第7期5卷 53-64页

作者： md. Taslim Arefin Mohammad Hanif Ali A. K. M. Fazlul haque Department of Computer Science and Engineering Jahangirnagar University Dhaka Bangladesh Department of Electronics and Telecommunication Engineering Daffodil International University Dhaka Bangladesh

Over the past years a booming interest is comprehended in the field of wireless communication for the development of a monitoring system to observe human vital organs activities remotely. Wireless Body Area Network (WBAN) is such network that provides a continuous monitoring over or inside human body for a long period and can support transmission of real time traffic such as data, voice, video to observe the status of vital organs functionalities. In this paper an overview of WBAN technology and its requirements has been narrated. The aim of this paper was to offer a suitable and appropriate wireless technology for deploying WBAN. Several suitable short range wireless communication technologies that can be adopted in WBAN have also been discussed. Finally numerous applications in the field of medical and non-medical sectors using WBAN technology have been outlined.

关键词： WBAN WiFi Bluetooth ZigBee Monitoring Sensors WBAN Applications

Phase change material-based rooftop on public transport for thermal management

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Energy Storage and Saving 2023年第4期2卷 549-558页

作者： md.Araf Hossan Shams Al Deen Aryan md.Sajadul haque Noman Dewan Hasan Ahmed Department of Mechanical and Production Engineering Ahsanullah University of Science and TechnologyDhakaBangladesh

Phase change materials(PCMs)are used in buildings and automobiles to control the interior temperature,following to their high thermal storage capacity and energy *** summer,controlling the interior temperature of vehicles can be difficult,especially in cities where public transportation is excessively ***,heating,ventilation,and air-conditioning systems are included to provide thermal comfort inside vehicles,but they use a significant amount fuel,which ultimately have negative impacts on the *** this study,a prototype bus model was developed from an actual bus and scaled-down to 1/20th size.A bulb was used as an internal heat source and experiments were conducted under the sun in summer to reflect scenarios of buses stuck in *** cases were considered by opening and closing the windows and doors and placing the PCM layer on the roof and covering the *** results demonstrate that when the PCM is used to cover the bulb and roof,the interior temperature can drop to the ambient temperature and remain there for a longer period of *** fact,keeping the windows and doors open results in a significantly lower indoor temperature than when they are *** results show that the heat from the engine makes a major contribution to raising the temperature inside of the *** results from the opened cases can be applied to various forms of public transportation worldwide,but for many closed vehicles,additional ducting systems integrated with PCM may be the best option.

关键词： Sodium sulfate decahydrate Phase change material Thermal energy storage Transportation

Comparison of GFR by Creatinine Clearance with Estimated GFR by Various Prediction Equations in a Bangladeshi Population

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Journal of Life Sciences 2012年第3期6卷 330-334页

作者： Muhammad Saiedullah Muhammad Rezwanur Rahman md. Aminul haque Khan Shoma Hayat ShahnajBegum Department of Biochemistry ＆ Cell Biology Bangladesh Institute of Health Sciences （BillS） Dhaka 1216 Bangladesh Department of Biochemistry Delta Medical College Dhaka 1216 Bangladesh Department of Biochemistry Enam Medical College Dhaka 1340 Bangladesh

Glomerular filtration rate （GFR） is considered as the best marker of kidney function. Evaluation of various prediction equations to estimate GFR is rare in our population. The aim of this study was to compare GFR estimated by various prediction equations with GFR by creatinine clearance （GFRer） in Bangladeshi population. Serum creatinine and 24 hours urinary creatinine concentrations were measured in 216 adult Bangladeshi subjects （100 males and 116 females）. Creatinine clearance rate was calculated and adjusted for body surface area to obtain GFRcr. GFR was also calculated by CKD-EPI, md.D4, Cockcroft-Gault, Jelliffe, Mawer, Bjornsson, Gates, Apollo-Chennai and Mayo Clinic prediction equations and compared with GFRcr. Results were expressed as mean ＋ SD and compared by two-tailed paired t-test, precision （r2） and receiver-operating characteristic curve. Mean ± SD of age of the total subjects was 57.15 ±10.96 years. The mean GFILzr was 42.41 ± 22.95 mL/min/1.73m2. Estimated GFR （eGFR） by CKD-EPI, md.D4, Cockcroft-Gault, Jelliffc 1, Jelliffe 2, Mawer, Bjornsson, Gates, Apollo-Chennai and Mayo Clinic prediction equations were 8.19 ± 13.80, 5.30 ±13.61, 11.54 ± 16.86, 8.66± 18.64, 17.25 ± 19.98, 10.86 ± 22.48, 14.60 ± 17.92, 12.18 ± 16.42, 39.86 ± 21.96 and 20.47 ± 20.49 mL/min/1.73m2 higher than GFR, （P 〈 0.001）. The precision （r2） of eGFRs were 0.7114, 0.6924, 0.6431, 0.4802, 0.5048, 0.5921, 0.6286, 0.6158, 0.1635, and 0.5586 for CKD-EPI, md.D4, Cockcroft-Gault, Jelliffe 1, Jelliffe 2, Mawer, Bjornsson, Gates, Apollo-Chennai and Mayo Clinic prediction equations, respectively. The area under receiver-operating characteristic curve was the lowest for md.D4 equation. This study revealed that GFR estimated by standardized md.D4 variables equation is closer to creatinine clearance rate in the study population.

关键词： Glomerular filtration rate estimated GFR creatinine clearance rate CCR md.D.

Petrophysical properties assessment using wireline logs data at well#3 of Srikail gas field,Bangladesh

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China Geology 2022年第3期5卷 393-401页

作者： md.Shahadot Hossain M.Moklesur Rahman Mst.Habiba Khatu md.Rubel haque Department of Petroleum and Mining Engineering Jashore University of Science and TechnologyJashore 7408Bangladesh

This study focused on the quantitative analysis of the petrophysical parameters in characterizing the reservoir properties of the Srikail gas field using multi-scale wireline *** parameters(shale volume,porosity,water saturation and hydrocarbon saturation)were estimated from the combination of gamma ray log,resistivity log,density log and neutron log for three hydrocarbon(gas)-bearing zones at well#*** the first time,log records at 0.1 m and 0.2 m intervals were read for this *** showed the average shale volume is 21.07%,53.67%and 51.71%for zone-1,zone-2 and zone-3,*** these zones,the estimated average porosity was 35.89%,29.83%and 28.76%,*** average water saturation of 31.54%,16.83%and 23.39%and average hydrocarbon saturation of 68.46%,83.17%and 76.61%were calculated for zone-1,zone-2 and zone-3,*** zone-2 is regarded the most productive zone of well#*** was found that the values of some parameters(porosity,hydrocarbon saturation and permeability)are higher than the existing ***,this study confirmed that the log reading at minute/close interval provides better quantitive values of the reservoir’s petrophysical *** is expected that this result will contribute to the national gas field development program in future.

关键词： Srikail gas field Multiple wireline logs Reservoir petrophysical properties Quantitative values Gas field development Bangladesh

Aeromonas veronii isolated from climbing perch(Anabas testudineus)suffering from epizootic ulcerative syndrome(EUS)

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Aquaculture and Fisheries 2023年第3期8卷 288-295页

作者： Rakib Ehsan Ashikur Rahman Sulav Indra Paul md.Ali Arman Ador md.Shameul haque Tasmina Akter md.Mahbubur Rahman Institute of Biotechnology and Genetic Engineering Bangabandhu Sheikh Mujibur Rahman Agricultural UniversityGazipur1706Bangladesh Department of Fisheries Management Faculty of FisheriesBangabandhu Sheikh Mujibur Rahman Agricultural UniversityGazipur1706Bangladesh

Motile Aeromonads are responsible for various diseases in fishes that cause significant economic losses in *** *** also frequently isolated from fish suffering from Epizootic Ulcerative Syndrome(EUS).The present study was conducted to isolate and identify *** from Vietnam climbing perch(Anabas testudineus)suffering from EUS,evaluate the pathogenicity of the isolates,and find out antibiogram profile and susceptibility of the isolates to medicinal plant *** climbing perch(***)suffering from EUS was collected from fish farms located at Savar,Dhaka and bacteria were isolated from the external ulcerative lesion,and kidney and liver of the infected fish on nutrient agar *** phenotypic identification of the bacterial isolates was performed following morphological,physiological and biochemical characterization *** 16S rRNA gene sequencing was accomplished for further molecular identification of five selected *** evaluate the pathogenicity of the isolates in vivo artificial infection challenge test was conducted through immersion *** in vivo pathogenicity test was done at three different temperatures(18◦C,28◦C,and 37◦C)to examine the effects of temperature on the pathogenicity of the *** commercial antibiotics were used to find out the antibiogram profile of the ***,susceptibility of the isolates was screened against 19 medicinal plants extracts.A total of 38 out of 46 isolates isolated from Vietnam climbing perch(***)suffering from EUS were phenotypically identified as Aeromonas *** randomly selected isolates were further confirmed as *** by analyzing the 16S rRNA gene sequence *** pathogenicity of the isolates was found moderate to high(41%-80%mortality)in the artificially challenged *** highest and lowest mortality was obtained in the fish challenged with the isolates BFKA33 and BFKA12,*** isolates were found resis

关键词： Aeromonas veronii Anabas testudineus,Epizootic ulcerative syndrome Antibiogram Medicinal plant extracts

Condition Monitoring and Maintenance Management with Grid-Connected Renewable Energy Systems

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Computers, Materials & Continua 2022年第8期72卷 3999-4017页

作者： md.Mottahir Alam Ahteshamul haque Mohammed Ali Khan Nebras M.Sobahi Ibrahim Mustafa Mehedi Asif Irshad Khan Department of Electrical and Computer Engineering(ECE) King Abdulaziz UniversityJeddah 21589Saudi Arabia Advance Power Electronics Research Lab Department of Electrical EngineeringJamia Millia IslamiaNew Delhi 110025India Department of Electrical Power Engineering Faculty of Electrical Engineering and CommunicationBrno University of TechnologyBrno 61600Czech Republic Center of Excellence in Intelligent Engineering Systems(CEIES) King Abdulaziz UniversityJeddah 21589Saudi Arabia Computer Science Department Faculty of Computing and Information TechnologyKing Abdulaziz UniversityJeddah 21589Saudi Arabia

The shift towards the renewable energy market for carbon-neutral power generation has encouraged different governments to come up with a plan of *** with the endorsement of renewable energy for harsh environmental conditions like sand dust and snow,monitoring and maintenance are a few of the prime *** problems were addressed widely in the literature,but most of the research has drawbacks due to long detection time,and high misclassification *** to overcome these drawbacks,and to develop an accurate monitoring approach,this paper is motivated toward the understanding of primary failure concerning a grid-connected photovoltaic(PV)system and highlighted along with a brief overview on existing fault detection *** on the drawback a data-driven machine learning approach has been used for the identification of fault and indicating the maintenance unit regarding the operation and maintenance ***,the system was tested with a 4 kWp grid-connected PV system,and a decision tree-based algorithm was developed for the identification of a *** results identified 94.7%training accuracy and 14000 observations/sec prediction speed for the trained classifier and improved the reliability of fault detection nature of the grid-connected PV operation.

关键词： Fault detection machine learning fault ride through

Utilization of Open Source Spatial Data for Landslide Susceptibility Mapping at Chittagong District of Bangladesh—An Appraisal for Disaster Risk Reduction and Mitigation Approach

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International Journal of Geosciences 2017年第4期8卷 577-598页

作者： md. Ashraful Islam Sanzida Murshed S. M. Mainul Kabir Atikul haque Farazi md. Yousuf Gazi Israt Jahan Syed Humayun Akhter Department of Geology University of Dhaka Dhaka Bangladesh Department of Geology and Mining University of Barisal Barisal Bangladesh

Since creation of spatial data is a costly and time consuming process, researchers, in this domain, in most of the cases rely on open source spatial attributes for their specific purpose. Likewise, the present research aims at mapping landslide susceptibility at the metropolitan area of Chittagong district of Bangladesh utilizing obtainable open source spatial data from various web portals. In this regard, we targeted a study region where rainfall induced landslides reportedly causes causalities as well as property damage each year. In this study, however, we employed multi-criteria evaluation (MCE) technique i.e., heuristic, a knowledge driven approach based on expert opinions from various discipline for landslide susceptibility mapping combining nine causative factors—geomorphology, geology, land use/land cover (LULC), slope, aspect, plan curvature, drainage distance, relative relief and vegetation in geographic information system (GIS) environment. The final susceptibility map was devised into five hazard classes viz., very low, low, moderate, high, and very high, representing 22 km2 (13%), 90 km2 (53%);24 km2 (15%);22 km2 (13%) and 10 km2 (6%) areas respectively. This particular study might be beneficial to the local authorities and other stake-holders, concerned in disaster risk reduction and mitigation activities. Moreover this study can also be advantageous for risk sensitive land use planning in the study area.

关键词： Susceptibility Mapping Open Source Spatial Data Heuristic Model Chittagong Metropolitan Area Geographic Information System (GIS) Disaster Risk Reduction

A Critical Analysis of Machine Learning and Deep Learning Methods for Cervical Cancer Screening

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Journal of Computer and Communications 2023年第12期11卷 64-85页

作者： Muhtasim Mahmudur Rahman Jakir Khan Abu Sale Mohammad Mostafizur Rahman Redoanul haque md. Sumon Ali Department of Computer Science and Engineering Bangladesh Army University of Engineering & Technology Natore Bangladesh

Cervical cancer is a serious public health issue worldwide, and early identification is crucial for better patient outcomes. Recent study has investigated how ML and DL approaches may be used to increase the accuracy of vagina tests. In this piece, we conducted a thorough review of 50 research studies that applied these techniques. Our investigation compared the outcomes to well-known screening techniques and concentrated on the datasets used and performance measurements reported. According to the research, convolutional neural networks and other deep learning approaches have potential for lowering false positives and boosting screening precision. Although several research used small sample sizes or constrained datasets, this raises questions about how applicable the findings are. This paper discusses the advantages and disadvantages of the articles that were chosen, as well as prospective topics for future research, to further the application of ml and dl in cervical cancer screening. The development of cervical cancer screening technologies that are more precise, accessible, and can lead to better public health outcomes is significantly affected by these findings.

关键词： Cervical Cancer Neoplasms Screening Machine Learning Techniques Deep Learning Techniques