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Approximation of an Integral Markov Process Arising in the Approximation of Stochastic Differential Equation

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Advances in Pure Mathematics 2022年第1期12卷 29-47页

作者： mohammad rahman Department of Mathematics & Statistics University of North Florida Jacksonville FL-32224 USA

We provide the derivation of a new formula for the approximation of an integral Markov process arising in the approximation of stochastic differential equations. This formula extends an existing formula derived in [1]. We have shown numerically that the leading order approximation of the differential equation with noise by solving an associated averaged problem and estimating the difference between them and the result is illustrated through some examples.

关键词： Variance Markov Process Parametric Noise Differential Equation Approximations

Toward a sustainable future:Examining the interconnectedness among Foreign Direct Investment(FDI),urbanization,trade openness,economic growth,and energy usage in Australia

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Regional Sustainability 2023年第4期4卷 405-415页

作者： Liton Chandra VOUMIK Md.Hasanur rahman Md.Maznur rahman mohammad RIDWAN Salma AKTER Asif RAIHAN Department of Economics Noakhali Science and Technology UniversityNoakhali3814Bangladesh Department of Economics Sheikh Fazilatunnesa Mujib UniversityJamalpur2000Bangladesh Department of Economics Comilla UniversityCumilla3506Bangladesh Institute of Forestry and Environmental Sciences University of ChittagongChittagong4331Bangladesh

The energy demand in Australia is increasing with the industrialization and rapid economic *** study analyzed the relationships among the economic growth,Foreign Direct Investment(FDI),trade openness,urbanization,and energy usage in Australia based on the data from World Development Indicators(WDI)from 1972 to *** results indicates that there is a cointegration among economic growth,FDI,trade openness,urbanization,and energy usage,which was traced through the autoregressivedistributed lag(ARDL).The Zivot-Andrews unit root test reveals that energy usage,economic growth,FDI,urbanization,and trade openness show significant structural breaks in 1993,1996,1982,2008,and 1994,*** ARDL model shows that economic growth has a positive and significant effect on energy usage in the long-run(0.814)and short-run(0.809).Moreover,the results also show that FDI(0.028)and trade openness(0.043)have positive impacts on energy usage in the ***,urbanization shows a negative and significant influence on energy usage in the long-run(–0.965).Then,the research demonstrates a unidirectional causation between energy usage and trade openness,with energy usage significantly causing trade *** current study endorses energy consumption policies and investment strategies for a paradigm shifting from a reliance on fossil fuels as the primary energy source to renewable energy *** findings have profound implications for sustainable energy usage.

关键词： Renewable energy Foreign Direct Investment(FDI) Trade openness Urbanization Climate change Marshallian Demand Function

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Effective antimicrobial therapies of urinary tract infections among children in low-and middle-income countries:A systematic review

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Pediatric Investigation 2023年第2期7卷 102-110页

作者： Rifat Ara Sarker mohammad Nasrullah Zarrin Tasnim Sadia Afrin mohammad Delwer Hossain Hawlader KM Saif-Ur-rahman Infectious Disease Division icddrbDhakaBangladesh Maternal and Child Health Division icddrbDhakaBangladesh Public Health Professional Development Society(PPDS) DhakaBangladesh Health System and Population Studies Division icddrbDhakaBangladesh Department of Public Health North South UniversityDhakaBangladesh Evidence Synthesis Ireland and Cochrane Ireland University of GalwayGalwayIreland College of Medicine Nursing and Health SciencesUniversity of GalwayGalwayIreland

Importance:Urinary tract infection(UTI)is one of the most common infections encountered in infancy and *** the emerging problem of antibiotic resistance in recent years,the use of antibiotics for better management of UTIs is ***:This study aims to explore the efficacy and adverse effects of the available antimicrobial agents that are used in pediatric UTIs in low-and middle-income countries(LMICs).Methods:Five electronic databases were searched to identify relevant *** reviewers independently performed screening,data extraction,and quality assessment of the available *** controlled trials providing antimicrobial interventions in both male and female participants within the age range of 3 months to 17 years in LMICs were ***:Six randomized controlled trials from 13 LMICs were included in this review(four trials explored the efficacy).Due to high heterogeneity across the studies,a meta-analysis was not *** than attrition and reporting bias,the risk of bias was moderate to high due to poor study *** differences in the efficacy and adverse events of different antimicrobials were not found to be statistically ***:This review indicates the necessity for additional clinical trials on children from LMICs with more significant sample numbers,adequate intervention periods,and study design.

关键词： Antimicrobial agents Children Efficacy LMICs Urinary tract infection

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Dynamic channel estimation-aware routing protocol in mobile cognitive radio networks for smart IIoT applications

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Digital Communications and Networks 2023年第2期9卷 367-382页

作者： Qusay M.Salih Md Arafatur rahman A.Taufiq Asyhari Muhammad Kamran Naeem mohammad Patwary Ryan Alturki Mohammed Abdulaziz Ikram Faculty of Computing Universiti Malaysia Pahang26300GambangPahangMalaysia School of Engineering Computing and Mathematical SciencesUniversity of WolverhamptonUK Data Science Program Monash UniversityIndonesiaand Birmingham City UniversityB47XGUK Department of Information Science College of Computer and Information SystemsUmm Al-Qura UniversitySaudi Arabia Computer Science Department Al Jumoum University CollegeUmm Al-Qura UniversitySaudi Arabia

Cognitive Radio Networks(CRNs)have become a successful platform in recent years for a diverse range of future systems,in particularly,industrial internet of things(IIoT)*** order to provide an efficient connection among IIoT devices,CRNs enhance spectrum utilization by using licensed ***,the routing protocol in these networks is considered one of the main problems due to node mobility and time-variant channel ***,the channel selection for routing protocol is indispensable in CRNs to provide an adequate adaptation to the Primary User(PU)activity and create a robust routing *** study aims to construct a robust routing path by minimizing PU interference and routing delay to maximize throughput within the IIoT ***,a generic routing framework from a cross-layer perspective is investigated that intends to share the information resources by exploiting a recently proposed method,namely,Channel Availability ***,a novel cross-layer-oriented routing protocol is proposed by using a time-variant channel estimation *** protocol combines lower layer(Physical layer and Data Link layer)sensing that is derived from the channel estimation ***,it periodically updates and stores the routing table for optimal route ***,in order to achieve higher throughput and lower delay,a new routing metric is *** evaluate the performance of the proposed protocol,network simulations have been conducted and also compared to the widely used routing protocols,as a *** simulation results of different routing scenarios demonstrate that our proposed solution outperforms the existing protocols in terms of the standard network performance metrics involving packet delivery ratio(with an improved margin of around 5–20%approximately)under varying numbers of PUs and cognitive users in Mobile Cognitive Radio Networks(MCRNs).Moreover,the cross-layer routing protocol successfully achiev

关键词： Channel selection Cross-layer design Mobile cognitive radio networks Routing protocol IIoT applications

Adoption determinants of improved management practices and productivity in pond polyculture of carp in Bangladesh

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Aquaculture and Fisheries 2023年第1期8卷 96-101页

作者： Md Sadique rahman mohammad Mizanul Haque Kazal Shah Johir Rayhan Shirajum Manjira Department of Management and Finance Sher-e-Bangla Agricultural UniversitySher-e-Bangla NagarDhaka1207Bangladesh Department of Development and Poverty Studies Sher-e-Bangla Agricultural UniversitySher-e-Bangla NagarDhaka1207Bangladesh

Adopting improved management practices for rearing carp can play a vital role in developing the aquaculture sector of *** study identifies the factors that facilitate the adoption of improved management practices and their relationship with *** data was collected from 300 carp farmers through face-to-face *** management practices were divided into three categories:simple,intermediate and *** indicated that high adopters(those who adopted at least one simple,one intermediate and one complex practice)were only around 10%of *** adoption of improved management practices was influenced by spousal education level,training,extension contact,and off-farm income *** of high adopters was 38%higher than that of *** implications from this research included improving extension facilities from public agencies to facilitate adoption of improved practices and to increase and sustain productivity in carp *** the current extension approach and diversifying income sources among farmers will facilitate widespread adoption of improved management practices.

关键词： Adoption Aquaculture Extension Ordered probit Productivity

Salicylic Acid Application Mitigates Oxidative Damage and Improves the Growth Performance of Barley under Drought Stress

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Phyton-International Journal of Experimental Botany 2023年第5期92卷 1513-1537页

作者： Shah mohammad Naimul Islam Niloy Paul Md.Mezanur rahman Md.Ashraful Haque Md.Motiar Rohman mohammad Golam Mostofa Institute of Biotechnology and Genetic Engineering Bangabandhu Sheikh Mujibur Rahman Agricultural UniversityGazipur1706Bangladesh Institute of Genomics for Crop Abiotic Stress Tolerance Department of Plant and Soil ScienceTexas Tech UniversityLubbock79409USA Plant Breeding Division Bangladesh Agricultural Research InstituteGazipur1701Bangladesh Department of Energy Plant Research Laboratory Michigan State UniversityEast Lansing48824USA

Drought is a severe environmental constraint,causing a significant reduction in crop productivity across the *** acid(SA)is an important plant growth regulator that helps plants cope with the adverse effects induced by various abiotic *** current study investigated the potential effects of SA on drought tolerance efficacy in two barley(Hordeum vulgare)genotypes,namely BARI barley 5 and BARI barley ***-day-old barley seedlings were exposed to drought stress by maintaining 7.5%soil moisture content in the absence or presence of 0.5,1.0 and 1.5 mM *** exposure led to severe damage to both genotypes,as indicated by phenotypic aberrations and reduction of dry *** the other hand,the application of SA to drought-stressed plants protected both barley genotypes from the adverse effects of drought,which was reflected in the improvement of phenotypes and biomass *** supplementation improved relative water content and proline levels in drought-stressed barley genotypes,indicating the osmotic adjustment functions of SA under water-deficit *** stress induced the accumulation of reactive oxygen species(ROS),such as hydrogen peroxide(H2O2)and superoxide(O_(2)•^(−)),and the lipid peroxidation product malondialdehyde(MDA)in the leaves of barley *** supply of SA reduced oxidative damage by restricting the accumulation of ROS through the stimulation of the activities of key antioxidant enzymes,including superoxide dismutase(SOD),peroxidase(POD),catalase(CAT),ascorbate peroxidase(APX)and glutathione peroxidase(GPX).Among the three-applied concentrations of SA,0.5 mM SA exhibited better mitigating effects against drought stress considering the phenotypic performance and biochemical ***,BARI barley 5 showed better performance under drought stress than BARI barley 7 in the presence of SA ***,our results suggest that SA played a crucial role in improving water status and antioxidant

关键词： Antioxidant defense barley drought stress plant growth reactive oxygen species salicylic acid

Impact of industrial effluent on growth and yield of rice(Oryza sativa L.) in silty clay loam soil

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Journal of Environmental Sciences 2015年第4期27卷 231-240页

作者： mohammad Anwar Hossain Golum Kibria Muhammad Mustafizur rahman mohammad Mizanur rahman Abul Hossain Molla mohammad Mostafizur rahman mohammad Khabir Uddin Department of Environmental Sciences Jahangirnagar University Department of Soil Science Bangabandhu Sheikh Mujibur Rahman Agricultural University Department of Bioenvironmental Science Bangabandhu Sheikh Mujibur Rahman Agricultural University

Degradation of soil and water from discharge of untreated industrial effluent is alarming in Bangladesh. Therefore, buildup of heavy metals in soil from contaminated effluent, their entry into the food chain and effects on rice yield were quantified in a pot experiment. The treatments were comprised of 0, 25%, 50%, 75% and 100% industrial effluents applied as irrigation water. Effluents, initial soil, different parts of rice plants and post-harvest pot soil were analyzed for various elements, including heavy metals. Application of elevated levels of effluent contributed to increased heavy metals in pot soils and rice roots due to translocation effects, which were transferred to rice straw and grain. The results indicated that heavy metal toxicity may develop in soil because of contaminated effluent *** metals are not biodegradable, rather they accumulate in soils, and transfer of these metals from effluent to soil and plant cells was found to reduce the growth and development of rice plants and thereby contributed to lower yield. Moreover, a higher concentration of effluent caused heavy metal toxicity as well as reduction of growth and yield of rice, and in the long run a more aggravated situation may threaten human lives,which emphasizes the obligatory adoption of effluent treatment before its release to the environment, and regular monitoring by government agencies needs to be ensured.

关键词： Biomass Crop yield Heavy metal Industrial effluent Soil pollution

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Distribution of heavy metals in water and sediment of an urban river in a developing country:A probabilistic risk assessment

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International Journal of Sediment Research 2022年第2期37卷 173-187页

作者： Mir mohammad Ali Saima rahman Md Saiful Islam Md Refat Jahan Rakib Shaharior Hossen Md Zillur rahman Tapos Kormoker Abubakr M. Idris Khamphe Phoungthong Institute of Disaster Management Khulna University of Engineering and Technology Department of Aquaculture Sher-e-Bangla Agricultural University Department of Urban and Regional Planning Khulna University of Engineering and Technology Department of Soil Science Patuakhali Science and Technology University Department of Fisheries and Marine Science Noakhali Science and Technology University Department of Fisheries Science Chonnam National University Quality Control Chemistry Lab Department of Fisheries Department of Emergency Management Patuakhali Science and Technology University Department of Chemistry College of Science King Khalid University Research Center for Advanced Materials Science (RCAMS) King Khalid University Environmental Assessment and Technology for Hazardous Waste Management Research Center Faculty of Environmental Management Prince of Songkla University

River water and sediment embody environmental characteristics that give valuable eco-environmental *** to rapid industrialization,the aquatic environment of any urban river can be seriously polluted by heavy metals(HMs).The global concern is caused by heavy metal pollution because of its potential harm to aquatic ecosystems and human *** the Bhairab River,Bangladesh,surface sediment concentrations of globally alarming toxic metals such as arsenic(As),chromium(Cr),cadmium(Cd),and lead(Pb) were measured to determine the ecological and human health risks of the riverine *** average As,Cr,Cd,and Pb concentrations in water were 3.55,31.74,1.44,and23.82 μg/L,respectively,and in sediment were 4.13,34.17,1.66,and 25.46 mg/kg,*** the winter,metals in sediment were higher than during the *** most sediment samples,the enrichment factor(EF),contamination factor(CF),geoaccumulation index(I),pollution load index(PLI) of As,Cr,Cd,and Pb indicated moderate *** potential ecological risk(PER) in sediment followed the descending order of Cd> As> Pb> *** contamination level of toxic metals implied that the condition is frightening and probably severely affecting the aquatic ecology of this riverine ecosystem.

关键词： Toxic metals Environmental risk Bioaccumulation Ecological risk Bangladesh

Metamaterial-Based Compact Antenna with Defected Ground Structure for 5G and Beyond

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Computers, Materials & Continua 2022年第5期71卷 2383-2399页

作者： Md.Mushfiqur rahman Md.Shabiul Islam mohammad Tariqul Islam Samir Salem Al-Bawri Wong Hin Yong Faculty of Engineering Multimedia UniversityPersiaran MultimediaCyberjaya63100SelangorMalaysia Department of Electrical Electronic and Systems EngineeringFaculty of Engineering and Built EnvironmentUniversiti Kebangsaan MalaysiaBangi43600Malaysia Space Science Centre Climate Change InstituteUniversiti Kebangsaan Malaysia(UKM)Bangi43600Malaysia

In this paper,a unit cell of a single-negative metamaterial structure loaded with a meander line and defected ground structure(DGS)is investigated as the principle radiating element of an *** unit cell antenna causes even or odd mode resonances similar to the unit cell structure depending on the orientation of the microstrip feed used to excite the unit ***,the orientation which gives low-frequency resonance is considered *** unit cell antenna is then loaded with a meander line which is parallel to the split bearing side and connects the other two sides orthogonal to the split bearing *** modified structure excites another mode of resonance at high frequency when a meander line defect is loaded on the metallic ground *** parameters of the meander line structure,the DGS shape,and the unit cell are optimized to place these two resonances at different frequencies with proper frequency intervals to enhance the ***,the feed is placed in an offset position for better impedance matching without affecting the bandwidth The compact dimension of the antenna is 0.25λL×0.23λL×0.02λL,whereλL is the free space wavelength with respect to the center frequency of the impedance *** proposed antenna is fabricated and *** results reveal that the modified design gives monopole like radiation patterns which achieves a fractional operating bandwidth of 26.6%,from 3.26 to 4.26 GHz for|S11|<−10 dB and a pick gain of 1.26 dBi is *** addition,the simulated and measured crosspolarization levels are both less than−15 dB in the horizontal plane.

关键词： Split ring resonator(SRR) meander line defected ground structure compact antenna bandwidth enhancement 5G technology