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Assessment of heavy metal contamination in the sur?cial sediments from the lower Meghna River estuary, Noakhali coast, Bangladesh

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International Journal of Sediment Research 2021年第3期36卷 384-391页

作者： mohammad Abdul Momin Siddique Mahfuzur Rahman Shahriar Md.Arifur Rahman Md.Rubel Hassan Zeenath Fardous Muhammed Alamgir Zaman Chowdhury mohammad Belal hossain Department of Oceanography Noakhali Science and Technology University Agrochemical and Environmental Research Division Institute of Food and Radiation Biology Atomic Energy Research Establishment 5. Department of Fisheries and Marine Science Noakhali Science and Technology University Department of Environmental Science and Disaster Management Noakhali Science and Technology University University of South Bohemia in Ceske Budejovice Faculty of Fisheries and Protection of Waters South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses Research Institute of Fish Culture and Hydrobiology

Sediment samples were collected from ten selected sites of the lower Meghna River estuary, and six heavy metals were analyzed with Atomic Absorption Spectrophotometry(AAS) to assess the contamination level and the metals’ association with sediment grain size. The current results revealed that the mean concentrations of the studied metals were ranked in descending order of iron(Fe)(1.29 ? 103 mg/kg) > zinc(Zn)(42.41 mg/kg) > lead(Pb)(12.48 mg/kg) > chromium(Cr)(10.59 mg/kg) > copper(Cu)(6.22 mg/kg) > cadmium(Cd)(0.28 mg/kg). The geo-accumulation, contamination, and pollution load indexes suggested that the lower Meghna river estuary was not contaminated by Fe, Zn, Pb, Cr, and *** mean size of the sediment ranged from 28.92 to 126.2 mm, and the Pearson correlation coefficient showed a significant association between Fe and Pb(coefficient of determination, r2? 0.836; p < 0.05),and no significant correlation was found between individual metals and grain size, indicating no or low influence on the metals distribution.

关键词： Metal pollution Pollution load index Grain size Trace metals

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Genotype×tillage interaction and the performance of winter bread wheat genotypes in temperate and cold dryland conditions

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Journal of Integrative Agriculture 2022年第11期21卷 3199-3215页

作者： Ebrahim ROOHI Reza mohammadI Abdoul Aziz NIANE Javad VAFABAKHSH Mozaffar ROUSTAEE mohammad Reza JALAL KAMALI Shahriar SOHRABI Shahriar FATEHI hossain TARIMORADI Horticulture and Crop Science Research Department Kurdistan Agricultural and Natural Resources Research and Education CenterAgricultural ResearchEducation and Extension Organization(AREEO)Sanandaj 66169-36311Iran Dry Land Agricultural Research Institute(DARI) Sararood CampusAREEOKermanshah 67441-61377Iran International Center for Agriculture Research in the Dry Area(ICARDA) Dubai 13979United Arab Emirates Seed and Plant Improvement Research Department Khorasan Razavi Agricultural and Natural Resources Research and Education CenterAREEOMashhad 91859-86111Iran Cereal Research Department DARIAREEOMaragheh 119Iran International Maize and Wheat Improvement Center(CIMMYT) Karaj 31585-4119Iran Kurdistan Jehade Agricultural Organization Sanandaj 66169-35383Iran

Growing concerns for food security and the alleviation of hunger necessitate knowledge-based crop management technologies for sustainable crop *** this study,13 winter bread wheat genotypes(old,relatively old,modern,and breeding lines)were evaluated under three different tillage systems,i.e.,conventional tillage(CT,full tillage with residue removed),reduced tillage(RT,chisel tillage with residue retained)and no-tillage(NT,no-tillage with residue retained on the soil surface)in farmer’s fields under rainfed conditions using strip-plot arrangements in a randomized complete block design with three replications in the west of Iran(Kamyaran and Hosseinabad locations)over two cropping seasons(2018–2019 and 2019–2020).The main objectives were to investigate the effects of tillage systems and growing conditions on the agronomic characteristics,grain yield and stability performance of rainfed winter bread wheat ***(P<0.01)genotype×tillage system interaction effects on grain yield and agronomic traits suggested that the genotypes responded differently to the different tillage *** number of grains per spike and plant height were positively(P<0.0)associated with grain yield under the NT system,so they may be considered as targeted traits for future wheat *** statistical models,the modern cultivars(“Sadra”and“Baran”)were identified as high yielding and showed yield stability across the different tillage *** per each tillage system,genotype“Sadra”followed by“Zargana-6//Dari 1-7 Sabalan”exhibited higher adaption to CT;while cultivars“Jam”and“Azar2”showed better performance under the RT system;and cultivars“Varan”and“Baran”tended to have better performance expression in the NT *** increased grain yields achieved in combination with lower costs and greater profits from conservation agriculture suggest that adapted cultivar and NT systems should be evaluated and promoted more widely to farmers in the west of Iran as an a

关键词： bread wheat no-tillage reduced tillage grain yield yield stability

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IoT and Blockchain-Based Mask Surveillance System for COVID-19 Prevention Using Deep Learning

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Computers, Materials & Continua 2022年第7期72卷 2033-2053页

作者： Wahidur Rahman Naif Al Mudawi Abdulwahab Alazeb Muhammad Minoar hossain Saima Siddique Tashfia MdTarequl Islam Shisir Mia mohammad Motiur Rahman Department of Computer Science and Engineering Mawlana Bhashani Science and Technology UniversityTangailBangladesh Department of Computer Science Najran UniversityNajran55461Saudi Arabia

On the edge of the worldwide public health crisis,the COVID-19 disease has become a serious headache for its destructive nature on humanity *** a facial mask can be an effective possible solution to mitigate the spreading of the virus and reduce the death ***,wearing a face mask in public places such as shopping malls,hotels,restaurants,homes,and offices needs to be *** research work comes up with a solution of mask surveillance system utilizing the mechanism of modern computations like Deep Learning(DL),Internet of things(IoT),and *** absence or displacement of the mask will be identified with a raspberry pi,a camera module,and the operations of DL and Machine Learning(ML).The detected information will be sent to the cloud server with the mechanism of IoT for real-time data *** proposed model also includes a Blockchain-based architecture to secure the transactions of mask detection and create efficient data security,monitoring,and storage *** research further includes an IoT-based mask detection scheme with signal bulbs,alarms,and notifications in the *** find the efficacy of the proposed method,a set of experiments has been enumerated and *** research work finds the highest accuracy of 99.95%in the detection and classification of facial *** related experiments with IoT and Block-chain-based integration have also been performed and calculated the corresponding experimental data *** Scale(SUS)has been accomplished to check the satisfaction level of use and found the SUS score of 77%.Further,a comparison among existing solutions on three emergent technologies is included to track the significance of the proposed ***,the proposed system can be an efficient mask surveillance system for COVID-19 and workable in real-time mask detection and classification.

关键词： Internet of things(IoT) blockchain deep learning feature reduction surveillance system

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Preparation and Characterization of the Electrospun Alginate Nanofibers

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Journal of Textile Science and Technology 2021年第2期7卷 91-100页

作者： mohammad Forhad hossain Mustafijur Rahman Faculty of Textile Chemical Engineering Bangladesh University of Textiles Dhaka Bangladesh Department of Dyes & Chemical Engineering Bangladesh University of Textiles Dhaka Bangladesh

Due to some intrinsic functional behavior of alginate, many potential applications in the healthcare industry especially in wound care sector are observed. Many researches have been carried out to develop potential biomedical biocompatible products in different forms from alginate fibres. Alginate nanofibres were prepared from sodium alginate polymer with the presence of poly-(ethylene oxide) (PEO), a small amount of Triton ×100 surfactant. A homogeneous spinning solution was prepared for producing Na-alginate/PEO nanofibers in electrospinning device. Nanofibres were produced by electrospinning from 70:30 and 80:20 Na-alginate/PEO of 4% solution. After a series of trials, the electrospinning parameters were optimized at 16 cm working distance, 0.4 mL/h flow rate and 10.5 kV applied voltage. The results show that the 4 wt% of 70:30 Na-alginate/PEO solution with 0.5 wt% Triton × 100 surfactant yielded smooth and stable electrospinning. The surface morphology of the fibres was investigated using Scanning Electron Microscope (SEM) and found the uniform fibres with an average diameter of 124 nm containing few thick or spindle-like fibres. FTIR investigation identified the chemical structure and molecular changes that occurred in the fibers.

关键词： Alginate Electrospinning Nanofibres Characterization Morphology

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Solar Energy Prospects in Bangladesh: Target and Current Status

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Energy and Power Engineering 2021年第8期13卷 322-332页

作者： Sazzad hossain mohammad Maksudur Rahman Department of Physics Jahangirnagar University Savar Dhaka Bangladesh

Owing to the favorable geographical location, Bangladesh captures a good amount of solar radiation per day. The proper utilization of this solar energy may reduce the country’s energy demand to a great extent. Bangladesh government has already made a master plan to utilize the abundant solar energy in different ways with a capacity development target of 600 MW by the end of 2021. Until 2018 a total capacity of 220 MW of solar power could be achieved by installing 6.9 million solar home systems (SHSs). On the other way, rooftop solar and solar mini-grid projects facilitated the capacity of 3.07 MW and 5 MW, respectively. A capacity of 32 MW could also be touched by solar irrigation projects with more than 1300 pumps for serving country’s rural people, and solar-diesel hybrid solution program (by installing 138 small power stations) has been supporting the telecom operators. Bangladesh power development board (BPDB), and Infrastructure Development Company Limited (IDCOL) have been promoting numerous research-development solar projects to many governments and private universities to build sustainable energy equipped country.

关键词： Solar Energy Electricity Bangladesh Government IDCOL BPDP

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Machine learning-based multi-objective optimization and thermal assessment of supercritical CO_(2) Rankine cycles for gas turbine waste heat recovery

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Energy and AI 2024年第2期16卷 363-384页

作者： Asif Iqbal Turja Ishtiak Ahmed Khan Sabbir Rahman Ashraf Mustakim mohammad Ishraq hossain M Monjurul Ehsan Yasin Khan Department of Mechanical and Production Engineering(MPE) Islamic University of Technology(IUT)Board BazarGazipur1704Bangladesh

Technologies for utilizing waste heat for power generation have attracted significant attention in recent years due to their potential to enhance energy efficiency and reduce greenhouse gas *** research focuses on the comparative and optimization analysis of three supercritical carbon dioxide(sCO_(2))Rankine cycles(simple,cascade,and split)for gas turbine waste heat *** study begins with parametric analysis,investigating the significant effects of key variables,including turbine inlet temperature,condenser inlet temperature,and pinch point temperature,on the thermal performance of advanced sCO_(2) power *** identify the most efficient cycle configuration,a multi-objective optimization approach is *** approach combines a Genetic Algorithm with machine learning regression models(Random Forest,XGBoost,Artificial Neural Network,Ridge Regression,and K-Nearest Neighbors)to predict cycle performance using a dataset extracted from cycle *** decision-making process for determining the optimal cycle configuration is facilitated by the TOPSIS(technique for order of preference by similarity to the ideal solution)*** study's major findings reveal that the split cycle outperforms the simple and cascade configurations in terms of power generation across various operating *** optimized split cycle not only demonstrates superior power output but also exhibits enhanced net power output,heat recovery,system and exergy efficiency of 7.99 MW,76.17%,26.86%and 57.96%,respectively,making it a promising choice for waste heat recovery *** research has the potential to contribute to the advancement and widespread adoption of waste heat recovery in energy technologies boosting system efficiency and economic *** provides a new perspective for future research,contributing to the improvement of energy generation infrastructure.

关键词： Supercritical co2 Rankine cycle Waste heat recovery Gas turbine Thermodynamic analysis Machine Learning Optimization

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Incorporating the mutational landscape of SARS-COV-2 variants and case-dependent vaccination rates into epidemic models

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Infectious Disease Modelling 2022年第2期7卷 75-82页

作者： mohammad Mihrab Chowdhury Md Rafiul Islam Md Sakhawat hossain Nusrat Tabassum Angela Peace Department of Mathematics and Statistics Texas Tech UniversityLubbockTXUSA Department of Mathematics Iowa State UniversityAmesIAUSA

Coronavirus Disease(COVID-19),which began as a small outbreak in Wuhan,China,in December 2019,became a global pandemic within months due to its high *** the absence of pharmaceutical treatment,various non-pharmaceutical interventions(NPIs)to contain the spread of COVID-19 brought the entire world to a *** almost a year of seemingly returning to normalcy with the world's quickest vaccine development,the emergence of more infectious and vaccine resistant coronavirus variants is bringing the situation back to where it was a year *** the light of this new situation,we conducted a study to portray the possible scenarios based on the three key factors:impact of interventions(pharmaceutical and NPIs),vaccination rate,and vaccine *** our study,we assessed two of the most crucial factors,transmissibility and vaccination rate,in order to reduce the spreading of COVID-19 in a simple but effective *** order to incorporate the time-varying mutational landscape of COVID-19 variants,we estimated a weighted transmissibility composed of the proportion of existing strains that naturally vary over ***,we consider time varying vaccination rates based on the number of daily new *** method for calculating the vaccination rate from past active cases is an effective approach in forecasting probable future scenarios as it actively tracks people's attitudes toward immunization as active case *** simulations show that if a large number of individuals cannot be vaccinated by ensuring high efficacy in a short period of time,adopting NPIs is the best approach to manage disease transmission with the emergence of new vaccine breakthrough and more infectious variants.

关键词： Break-through variants Waning immunity Reinfection Non-pharmaceutical interventions(NPIs) Vaccination rate

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Phenotypic and Molecular Assessment of Wheat Genotypes Tolerant to Leaf Blight,Rust and Blast Diseases

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Phyton-International Journal of Experimental Botany 2021年第4期90卷 1301-1320页

作者： Ashraful Alam Milan Skalicky Muhammad Rezaul Kabir Monwar hossain Abdul Hakim Siddikun Nabi Mandal Rabiul Islam Babul Anwar Akbar hossain Fahmy Hassan Amaal mohammadein Muhammad Aamir Iqbal Marian Brestic mohammad Anwar hossain Khalid Rehman Hakeem Ayman EL Sabagh Bangladesh Wheat and Maize Research Institute(BWMRI) Dinajpur5200Bangladesh Department of Botany and Plant Physiology Faculty of AgrobiologyFood and Natural ResourcesCzech University of Life Sciences PragueKamycka 129Prague16500Czechia Regional Agricultural Research Station BWMRIJashore7400Bangladesh Department of Biology College of ScienceTaif UniversityTaif21944Saudi Arabia Department of Agronomy Faculty of AgricultureUniversity of Poonch RawalakotHajira RoadShamsabad12350Pakistan Department of Plant Physiology Slovak University of AgricultureNitraTr.A.Hlinku 2Nitra94901Slovak Republic Department of Genetics and Plant Breeding Bangladesh Agricultural UniversityMymensingh2202Bangladesh Department of Biological Sciences Faculty of ScienceKing Abdulaziz UniversityJeddah21589Saudi Arabia Department of Agronomy Faculty of AgricultureKafrelsheikh UniversityKafrelsheikh33516Egypt

Globally among biotic stresses,diseases like blight,rust and blast constitute prime constraints for reducing wheat productivity especially in *** sustainable productivity,the development of disease-resistant lines and high yielding varieties is vital and *** study was conducted using 122 advanced breeding lines of wheat including 21 varieties developed by Bangladesh Wheat and Maize Research Institute with aims to identify genotypes having high yield potential and resistant to leaf blight,leaf rust and blast *** genotypes were evaluated for resistance against leaf blight and leaf rust at Dinajpur and wheat blast at Jashore under field *** of 122 genotypes tested,20 lines were selected as resistant to leaf blight based on the area under the diseases progress curve under both irrigated timely sown and irrigated late sown ***-two genotypes were found completely free from leaf rust infection,59 genotypes were identified as resistant,and 13 genotypes were identified as moderately resistant to leaf *** genotypes were immune against wheat blast,42 genotypes were categorized as resistant,and 26 genotypes were identified as moderately resistant to wheat *** data revealed that the 16 genotypes showed a positive 2NS segment among the 18 immune genotypes selected against wheat blast under field *** genotypes BAW 1322,BAW 1295,and BAW 1203 can be used as earlier maturing genotypes and the genotypes BAW 1372,BAW 1373,BAW 1297 and BAW 1364 can be used for lodging tolerant due to short plant *** genotypes WMRI Gom 1,BAW 1349 and BAW 1350 can be selected for bold grain and the genotypes WMRI Gom 1,BAW 1297,BAW 1377 can be used as high yielder for optimum seeding condition but genotypes BAW 1377 and BAW 1366 can be used for late sown *** selected resistant genotypes against specific diseases can be used in the further breeding program to develop wheat varieties having higher disea

关键词： Wheat blast leaf blight leaf rust 2NS marker grain yield

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Resilience-oriented intentional islanding of reconfigurable distribution power systems

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Journal of Modern Power Systems and Clean Energy 2019年第4期7卷 741-752页

作者： mohammad Hossein OBOUDI mohammad mohammadI mohammad RASTEGAR Department of Power and Control Engineering School of Electrical and Computer EngineeringShiraz UniversityShirazIran

The participation of distributed energy resources in the load restoration procedure,known as intentional islanding,can significantly improve the distribution system *** system reconfiguration can effectively alter islanding procedure and thus provide an opportunity to supply more demanded energy and reduce distribution system *** addition,high-impact events such as hurricanes and earthquakes may complicate the procedure of load restoration,due to the disconnection of the distribution system from the upstream grid or concurrent component *** paper presents a two-level method for intentional islanding of a reconfigurable distribution system,considering high-impact *** thefirst level,optimal islands are selected according to the graph model of the distribution *** the second level,an optimal power flow(OPF)problem is solved to meet the operation constraints of the islands by reactive power control and demand side *** proposed problem in the first level is solved by a combination of depth first search and particle swarm optimization *** OPF problem in the second level is solved in DIgSILENT *** proposed method is implemented in the IEEE 69-bus test system,and the results show the validity and effectiveness of the proposed algorithm.

关键词： Intentional islanding Active distribution system Distributed energy resource Distribution system reconfiguration Distribution system resilience

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An overview on the protected area system for forest conservation in Bangladesh

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Journal of Forestry Research 2010年第1期21卷 111-118,I0004页

作者： mohammad Shaheed hossain Chowdhury Masao Koike Forest Policy Laboratory Department of Forest ScienceFaculty of Agriculture Shinshu University

A total of 19 protected areas （PAs） have been established in Bangladesh representing all the four forest types of the country. Apart from being the repository of biological diversity, these PAs serve as the source of subsistence livelihoods to the local communities. While all the PAs are managed by the state Forest Department （FD）, with a view to ensure sustainability, a recent approach of co-management has been initiated in five PAs as a pilot project with an aid of development partners incorporating stakeholders＇ participation. Along with demonstrating a number of upbeat impacts, the initiatives exert some constraints which need to be addressed properly to ensure the success of participatory approach and enhance the ongoing conservation scheme. This paper reviews the published works, government and project documents to analyze the present status of PAs and suggest recommendations accordingly.

关键词： Protected areas biodiversity conservation co-management forest resources Bangladesh

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