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Frontiers of Structural and Civil Engineering 2024年第9期18卷 1445-1465页

作者： md.Marghoobul haque Kunal M.SHELOTE Namrata SINGH Supratic GUPTA Department of Civil Engineering Indian Institute of Technology DelhiNew Delhi 110016India

Concrete is the most widely utilized material for construction purposes,second only to water,in the ever-increasing need for construction *** is a brittle material and possesses a high risk of crack formation and consequent ***,which allows chemicals to enter and can cause concrete structures to lose their physico-mechanical and durability *** and rehabilitating concrete structures involves high costs and leads to various repair methods including coating,adhesives,polymers,supplementary cementitious materials(SCMs),and *** of the latest technologies is the use of microorganisms in *** added microorganisms lead to calcite precipitation and thereby heal the cracks *** study presents a comprehensive literature survey on bacteria-included concrete,before which a bibliographic survey is performed using VOSViewer *** addition to regular bacterial concrete,this study focuses on also using SCMs and fibers in bacterial concrete.A detailed literature review with data representation for various mechanical properties including compressive strength(CS),split tensile strength(SS),and flexure strength(FS),along with durability properties including carbonation,water absorption,resistance against chloride ion penetration,gas permeation,and resistance against cyclic freeze-and-thaw is presented.A study on the use of X-ray computed tomography(XCT)in bacterial concrete is highlighted,and the scope for future research,along with identification of the research gap,is presented.

关键词： bacterial concrete bibliographic survey biomineralization carbonation fibers

新西兰Taranaki盆地Maui气田构造建模

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石油勘探与开发 2016年第6期43卷 883-892页

作者： AKM Eahsanul haque md. AMINUL Islam MOHAMED Ragab Shalaby University of Brunei Darussalam Brunei Darussalam

利用三维地震和测井资料对Maui气田晚白垩世—上新世的沉积层序建立构造模型，结合地质统计学方法预测Taranaki盆地的构造力学特征。通过构造模型识别出受断裂影响的3期构造运动：晚白垩世—古新世裂谷期、晚始新世—中新世挤压性断裂... 详细信息

利用三维地震和测井资料对Maui气田晚白垩世—上新世的沉积层序建立构造模型，结合地质统计学方法预测Taranaki盆地的构造力学特征。通过构造模型识别出受断裂影响的3期构造运动：晚白垩世—古新世裂谷期、晚始新世—中新世挤压性断裂期、上新世一更新世构造分化期（Maui气田南部挤压性断裂、Maui气田北部正断层活动）。各期构造运动形成不同的构造样式，早渐新世以前具有轻微走滑特征的正断层较发育，断层倾角大（40°-70°），北部地层倾角（10°-15°）低于南部（15°-20°）；中渐新世一晚中新世发育低角度逆断层（20°-40°），表明这一时期构造整体受到挤压性应力作用；中渐新世—上新世地层出现构造反转，表明这一时期构造应力为先挤压后拉张。

关键词： Taranaki盆地 Maui气田三维地震断层格架伸展构造反转构造变差函数分析构造建模

A Photonic Crystal Fiber Based Asymmetric Slotted Structured Highly Sensitive Refractive Index Plasmonic Biosensor

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Journal of Sensor Technology 2022年第1期12卷 1-17页

作者： md. Arafat Rahman Tanvir Ahmed md. Ismail haque md. Shamim Anower Department of Electrical and Electronic Engineering Rajshahi University of Engineering and Technology Rajshahi Bangladesh Department of Electrical and Electronic Engineering International Islamic University Chittagong Chittagong Bangladesh

Surface plasmon resonance (SPR) sensors have grown in popularity owing to their sensitivity, precision, and capacity for a variety of applications, including detection, monitoring, and sensing, among others. Sensitivity and resolution are two areas where this technology has room for development. A plasmonic biosensor based on an asymmetric slotted PCF structure with extremely high sensitivity has been described and theoretically investigated. This high performance sensor is constructed and completely characterized using finite element method in COMSOL Multiphysics software environment. Sensitivity and resolution are analyzed as performance parameters for the proposed sensor. Numerical simulation exhibits the maximum wavelength-sensitivity of 1100 nm/RIU with 9.09 × 10-6 RIU resolution in the broad measurement range of refractive index from 1.30 to 1.44. A polarization controller can be used to fine-tune this extremely sensitive and wide-ranging refractive index sensor to fulfil a variety of practical needs. This is performed with the consideration of the variation in the refractive index (RI) of the analyte channels. In comparison with earlier PCF-based sensors, the fiber design structure is basic, symmetrical, simple to produce, and cost-effective. Because of the asymmetric air holes and higher sensitivities of the refractive index detector, it is possible to identify biomolecules, biochemicals and other analytes.

关键词： Surface Plasmon Resonance (SPR) Sensor High Sensitivity Photonic Crystal Fiber (PCF) Optical Fiber Sensor

Effect of Variety and Growth Regulator Concentration on Success of Air Layering in Plum

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Agricultural Sciences 2022年第1期13卷 65-73页

作者： Shailendra Nath Mozumd.r md. Iqbal haque md. Masudul haque Dristi Sarkar Muhammad Shahiduzzaman Regional Spices Research Center Bangladesh Agricultural Research Institute Gazipur Bangladesh Bangladesh Maize and Wheat Research Institute Nashipur Bangladesh

The experiment was conducted at the Regional Spices Research Center, BARI, Gazipur during June 2016 to October 2017 to evaluate the effect of genotype and growth regulator (IBA) on the success and performance of plum air layering. Air layering was done on two plum varieties (BARI Alubokhara-1 and PD Gaz 004) using seven levels of IBA concentration (viz. 0, 1000, 2000, 3000, 4000, 5000 and 6000 ppm) under a complete randomized (factorial) design (CRD). Significant variation was observed on rooting, establishment and death of layers due to variety and IBA concentrations except rooting and separation time. The un-fruiting line PD Gaz 004 showed outstanding performance in rooting and survivability of layers over BARI Alubokhara-1. Poor rooting and lower establishment caused very high mortality of layers in BARI Alubokhara-1. Rooting and survivability, number of roots, length of roots and leaf production increased with the increasing levels of IBA concentration up to 5000 ppm. The maximum (10 out of 10) rooting success of layer with 65.83% and 59.17% establishment from PD Gaz004 was obtained when 3000 and 4000 ppm IBA was used, respectively. In BARI Alubokhara-1, the highest rooting success (3.08), establishment rate (29.42%), number of root (4.28/layer) and root length (5.08 cm) were recorded with 4000 ppm IBA concentration.

关键词： Growth Regulator Layering Plum Success

Implementation of Effluent Treatment Plants for Waste Water Treatment

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Journal of Environmental Protection 2013年第3期4卷 301-308页

作者： Zakia Sultana md. Ershad Ali md. Sala Uddin md. Mominul haque Department of Chemistry Rajshahi University Rajshahi Bangladesh Department of Chemistry Tejgaon College National University Dhaka Bangladesh Department of Pharmacy Rajshahi University Rajshahi Bangladesh School of Materials Science and Engineering University of New South Wales Sydney Australia

This work is aimed at giving emphasis on the present pollution scenario in Bangladesh due to textile effluent and the consequent solution of the problem by installation of effluent treatment plant. Though the medium and small-scale industrial activities have a positive impact on the economy of our country, the increasing industrialization is contributing severe pollution to the environment by the toxic waste discharge. The liquid effluents from industries are causing a major havoc to the environment, ecology, agriculture, aquaculture and public health since the development of textile industries in the country. So, it is time to give a pause to the pollution and phase it out gradually to protect the river system. It had become a prerequisite to set up ETP in each industrial establishment, particularly at dyeing industries that were discharging huge amount of liquid waste to the rivers every day. Since the highest number of factories is of textile category and these types of factories play a major role in polluting the nature, Government’s main focus is on the textile mills and industries related to textile. But, for the successful implementation of ETPs, industry owners will have to be socially responsible and at the same time, government should provide the factory owners with logistic supports and relaxed timeframe to set up ETPs.

关键词： Industrial Effluents Water Quality BOD COD TSS

Contribution of Radioiodine Thyroid Uptake and Scintigraphy to the Diagnosis of Hyperthyroidism

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World Journal of Nuclear Science and Technology 2018年第2期8卷 70-77页

作者： md. Monirul haque Alamin md. Faruq Hossain md. Sanowar Hossain md. Selim Reza Department of Physics University of Rajshahi Rajshahi Bangladesh Institute of Nuclear Medicine and Allied Sciences (INMAS) BAEC Dhaka Bangladesh

In total 184 studies, which included thyroid uptake and scintigraphy, were performed in 68 hyperthyroid patients: 67% female and 33% male to investigate their thyroid conditions. The aim of the present study was to illustrate the role of uptake and scintigraphy tests in determining the thyroid status of hyperthyroid patients. The uptake study was performed by oral administration of 100 - 200 μCi of 131I as sodium-iodide and counting the radioactivity at 2 and 24 hrs, whereas thyroid scintigraphy was performed 20 minutes after an intravenous injection of 2 - 4 mCi of 99mTc-pertechnetate. The present results of thyroid uptake and scintigraphy successfully identified the thyroid condition in different states. The present results were also compared with some reported data and found to be fair in good agreement.

关键词： Radioiodine Uptake Scintigraphy Hyperthyroidism

Simulation of Natural Convection Flow with Magneto-Hydrodynamics in a Wavy Top Enclosure with a Semi-Circular Heater

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Open Journal of Applied Sciences 2023年第4期13卷 591-603页

作者： Mohammad Mahfuzul Islam md. Abdul Alim md. Mahmud Alam md. Jahirul haque Munshi Department of Mathematics Dhaka University of Engineering and Technology (DUET) Gazipur Bangladesh Department of Mathematics Bangladesh University of Engineering and Technology (BUET) Dhaka Bangladesh Department of Mathematics Hamdard University Bangladesh (HUB) Hamdard Nagar Gazaria Munshiganj Bangladesh

Natural convection flow in enclosure has different applications such as room ventilation, heat exchangers, the cooling system of a building etc. The Finite-Element method based on the Galerkin weighted residual approach is used to solve two-dimensional governing mass, momentum and energy-equations for natural convection flow in the presence of a magnetic field on a roof top with semi-circular heater. In the enclosure the horizontal lower wall was heated, the vertical two walls were adiabatic, inside the semi-circular heater, the wavy top wall cooled. The parameters Rayleigh number, Hartmann number and Prandtl number are considered. The effects of the Hartmann number and Rayleigh number on the streamlines, isotherms, velocity profiles and average Nusselt number are examined graphically. The local Nusselt number and the average Nusselt number of the heated portion of the enclosure with the semi-circular heater are presented in this paper. Finally, for the validation of the existing work, the current results are compared with published results and the auspicious agreement is achieved.

关键词： Natural Convection Magneto-Hydrodynamics (MHD) Finite Element Method (FEM) Wavy Enclosure Semi-Circular Heater

Hazard-based duration modelling of merging time interval on freeway on-ramps

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Transportation Safety and Environment 2023年第1期5卷 8-17页

作者： Ye Li Jichen Zhu md.Mazharul haque Jaeyoung Lee School of Traffic and Transportation Engineering Central South UniversityChangsha 410075HunanChina Key Laboratory of Road and Traffic Engineering of Ministry of Education Tongji UniversityShanghai 201804China School of Civil and Environmental Engineering Queensland University of TechnologyBrisbaneQLD 4001Australia.

Freeway on-ramps suffer high crash risks due to frequent merging *** study developed hazard-based duration models to investigate the merging time interval on freeway on-ramps based on microscopic trajectory *** effect,random effect and random parameters Weibull distributed accelerated failure time models were developed to capture merging time as a function of various dynamic *** random parameters model was found to outperform the two counterparts since the unobserved heterogeneity of individual drivers was *** estimation results indicate that drivers along the merging section with an auxiliary lane perform a smooth merging process and are easily affected by speed *** of leading and following vehicles on the merging and target lanes are found to influence the merging time interval for merging without an auxiliary lane,whereas the influence of surrounding vehicles ismarginal for thosewith an auxiliary *** findings of this study identify potential countermeasures for improving safety during the merging process.

关键词： hazard-based duration model on-ramp merging trajectory data freeway safety

Improved voltage tracking of autonomous microgrid technology using a combined resonant controller with lead-lag compensator adopting negative imaginary theorem

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Protection and Control of Modern Power Systems 2022年第1期7卷 149-164页

作者： md.Yah-Ya Ul haque md.Rashidul Islam Tanvir Ahmed md.Rafiqul Islam Sheikh Department of Electrical and Electronic Engineering Varendra UniversityRajshahi 6204Bangladesh Department of Electrical and Electronic Engineering Rajshahi University of Engineering&TechnologyRajshahi 6204Bangladesh

Growing application of distributed generation units at remote places has led to the evolution of microgrid(MG)*** an MG system functions independently,i.e.,in autonomous mode,unpredictable loads and uncertainties emerge throughout the *** obtain stable and flexible operation of an autonomous MG,a rigid control mechanism is *** this paper,a robust high-performance controller is introduced to improve the performance of voltage tracking of an MG system and to eliminate stability problems.A combination of a resonant controller and a lead-lag compensator in a positive position feedback path is designed,one which obeys the negative imaginary(NI)theorem,for both single-phase and three-phase autonomous MG *** controller has excellent tracking *** is investigated through considering various uncertainties with different load *** feasibility and effectiveness of the controller are also determined with a comparative analysis with some well-known controllers,such as linear quadratic regulator,model predictive and NI approached resonant *** confirms the superi-ority of the designed controller.

关键词： Negative imaginary theorem Resonant controller Lead-lag compensator Autonomous microgrid Voltage tracking

Assessment of Urban Physical Seismic Vulnerability Using the Combination of AHP and TOPSIS Models: A Case Study of Residential Neighborhoods of Mymensingh City, Bangladesh

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Journal of Geoscience and Environment Protection 2018年第2期6卷 165-183页

作者： md. Shaharier Alam Shamim Mahabubul haque Urban and Rural Planning Discipline Khulna University Khulna Bangladesh

Mymensingh, one of the oldest municipalities of Bangladesh, is at great risk against earthquakes because three major faults viz. Dauki fault, Madhupur fault, and Sylhet-Assam fault are located around it, and possesses liquefaction susceptible soil type. The city has great significance from the economic and administrative point of view and recently declared as the 8th administrative division of Bangladesh which directly stimulates the unplanned future expansion. Considering the potentiality of haphazard development and high seismic risk, it is crucial to assess the seismic vulnerability for taking the judicious decision regarding risk reduction measures for the city. The study combines Technique for Order Preference by Similarity to Ideal Solution method (TOPSIS) and Analytical Hierarchical Process (AHP) models to assess the seismic vulnerability of residential neighborhoods of Mymensingh city as the probability of death and damage is remarkable in residential neighborhoods than other land use types. A combined quantitative methodology of AHP-TOPSIS is used in this study to quantify 13 important qualitative and quantitative factors of earthquake vulnerability, decided on expert opinions. The data of 13 vulnerability factors are collected from the Mymensingh Strategic Development Plan (MSDP, 2011-2031) database, done under Comprehensive Disaster Management Programme (CDMP)-II during 2012-2014. Geographic Information System is used in this study to analyze and mapping of seismic vulnerability. Results indicated that 37 residential neighborhoods are very highly vulnerable, 55 neighborhoods are highly vulnerable, 75 neighborhoods are moderately vulnerable and 74 neighborhoods are in the low vulnerable category.

关键词： AHP GIS Physical Seismic Vulnerability TOPSIS