Md. Shohel Rana | Jahangirnagar University (original) (raw)

Papers by Md. Shohel Rana

Proceedings of the National Academy of Sciences, 2019

Phase transitions in halide perovskites triggered by external stimuli generate significantly diff... more Phase transitions in halide perovskites triggered by external stimuli generate significantly different material properties, providing a great opportunity for broad applications. Here, we demonstrate an In-based, charge-ordered (In + /In 3+ ) inorganic halide perovskite with the composition of Cs 2 In(I)In(III)Cl 6 in which a pressure-driven semiconductor-to-metal phase transition exists. The single crystals, synthesized via a solid-state reaction method, crystallize in a distorted perovskite structure with space group I 4/ m with a = 17.2604(12) Å, c = 11.0113(16) Å if both the strong reflections and superstructures are considered. The supercell was further confirmed by rotation electron diffraction measurement. The pressure-induced semiconductor-to-metal phase transition was demonstrated by high-pressure Raman and absorbance spectroscopies and was consistent with theoretical modeling. This type of charge-ordered inorganic halide perovskite with a pressure-induced semiconductor-to-m...

It is hereby declared that this thesis or any part of it has not been submitted elsewhere for the... more It is hereby declared that this thesis or any part of it has not been submitted elsewhere for the award of any degree or diploma.

International Journal of Research in Engineering, Science and Management

The rate of maternal mortality of Bangladesh is increasing day by day. Among many reasons early m... more The rate of maternal mortality of Bangladesh is increasing day by day. Among many reasons early marriage, unplanned impregnation or lack of antenatal care are the major causes of those maternal deaths. Antenatal care is significantly effective for the mother and their newborns during pregnancy period especially from severe bleeding, high blood pressures, infections or complications during delivery. Several researches have conducted in various countries about the antenatal care service factors affecting pregnant women during pregnancy period but have not been organized information collectively. Hence, further research need to accomplish a literature review for finding organized information about the antenatal care service factors affecting pregnant women in Bangladesh. This is a descriptive analysis based on the information extracted from different literature review, primary and secondary data sources by using a specific methodology. The study found that 60.87 percent pregnant women ...

Science, Technology & Public Policy

Women especially in developing countries are not empowered in most of fields of their life. They ... more Women especially in developing countries are not empowered in most of fields of their life. They depend on their husband or father in a number of ways. No doubt, education and change of society's attitude towards women is best tool to empower women. Decision making power regarding household, economic, healthcare and women participation in political and social activities can also play positive role to promote awareness to empower women in society. Nowadays, the scenario is changing in Bangladesh and women getting more empower in decision making, earnings and health care. This paper aims to evaluate the factors influencing women's empowerment in Bangladesh. This paper focuses on women empowerment through decision making power at household level, health care, political and social activities. This study reveals that majority of the married women can jointly make decision about their household and economic segment, health care, the participation in political and social activities with their husbands. This paper also shows that urban respondents are relatively more empowered than their rural counterparts and types of place of residence plays a significant role in the women empowerment in Bangladesh. The women who are currently working have more freedom to make decision over their personal, social and political life than the women who are not currently working. This paper recognizes that there is a strong relationship between decision making power and women empowerment.

food science of animal resources

A survey we conducted suggests that the ingestion of veterinary drug residues in edible animal pa... more A survey we conducted suggests that the ingestion of veterinary drug residues in edible animal parts constitutes a potential health hazard for its consumers, including, specifically, the possibility of developing multidrug resistance, carcinogenicity, and disruption of intestinal normal microflora. The survey results indicated that antibiotics, parasitic drugs, anticoccidial, or nonsteroidal anti-inflammatory drugs (NSAIDs) are broadly used, and this use in livestock is associated with the appearance of residues in various animal products such as milk, meat, and eggs. We observed that different cooking procedures, heating temperatures, storage times, fermentation, and pH have the potential to decrease drug residues in animal products. Several studies have reported the use of thermal treatments and sterilization to decrease the quantity of antibiotics such as tetracycline, oxytetracycline, macrolides, and sulfonamides, in animal products. Fermentation treatments also decreased levels of penicillin and pesticides such as dimethoate, malathion, Dichlorodiphenyldichloroethylene, and lindane. pH, known to influence decreases in cloxacillin and oxacillin levels, reportedly enhanced the dissolution of antimicrobial drug residues. Pressure cooking also reduced aldrin, dieldrin, and endosulfan in animal products. Therefore, this review provides updated information on the control of drug residues in animal products, which is of significance to veterinarians, livestock producers, and consumer health.

International Journal of Agricultural Science and Food Technology

Huge collections of barley landrace genotypes in Ethiopian are not studied for the magnitude of g... more Huge collections of barley landrace genotypes in Ethiopian are not studied for the magnitude of genetic distances from each other. Though knowing the contribution of individual traits is crucial to focus on particular traits in cultivar development; the traits of these genotypes are not yet studied. Hence, this experiment was conducted on 48 barley landrace accessions which were not studied yet and four standard checks to estimate the magnitude of genetic diversity among the genotypes and to identify the major morphological traits contributing for the observed variations. The experiment was laid in Augmented Randomized Complete Block Design in six blocks at Adet in 2016/17 cropping season. The traits used for analysis were days to 50% heading, days to maturity, plant height, total number of tillers/plant, effective number of tillers/plant, number of spikes/plant, spike length, average number of grains/plant, biomass yield/ha, thousand grain weight/gm, grain yield tones/ha and harvest index tones/ha. The 52 genotypes were grouped into six clusters where 65.39% of the genotypes (34) fall in cluster I, III and IV. Early matured genotypes were grouped in cluster III, late matured in cluster VI and high yielding and tall genotypes in cluster IV. The highest intra cluster distance was 22.513 for cluster III and IV. The highest inter cluster distance was 57.00 between cluster V and IV. The fi rst three principal components contributed 74.20% of the total variations observed among the genotypes. Principal component one (Pc1) alone had contributed 49.96%.% of the total variations mainly due to grain yield, biomass yield, thousand grain weight and plant height in their respective order. Principal component two (Pc2) contributed 15.98% of the total variations mainly through total number of tillers per plant, number of effective tillers per plant and number of spikes per plant in their descending order. Principal component three (Pc3) had contributed 8.25% of the total variations through days to maturity, days to 50% heading and number of grains per plant. The result ensures the existence of high genetic divergence among the studied genotypes.

Science Journal of Applied Mathematics and Statistics

This study is concerned with riverbank erosion and population migration which has more impact on ... more This study is concerned with riverbank erosion and population migration which has more impact on Bangladesh. The study is highly subject to riverbank erosion. Origin and Destination survey method are used for finding population migration and resettlement pattern and tracking population migration and resettlement. Riverbank erosion is causing socioeconomic and environmental problems in Bangladesh. Different research had identified that people who suffered from riverbank erosion ended up as landless migrated people and this migration is a major contributory factor to recurrent poverty in Bangladesh. The study was found that two-third people migrate permanently one union to another union because they get support from their neighbors, relatives, friends and they also stay here due to low living cost comparatively another area. There are no specific policies to rehabilitate the erosion-hit people. Thus, it is time to formulate policies to address prevention of riverbank erosion as well as to rehabilitate the river-erosion migrants.

Journal of Education and Practice, 2013

The study addresses the challenges of quality higher education in public universities of Banglade... more The study addresses the challenges of quality higher education in public universities of Bangladesh considering teaching aids, library facilities, availability of books and journals, research facilities, and laboratory facilities as independent variables and quality of higher education as dependent variable. Data has been collected through semi-structured questionnaire/ interview schedule from two main stakeholders of higher education-teachers and students. The study demonstrates that insufficiency of key elements is the main challenge of quality higher education in public universities of Bangladesh. Budgetary provision and utilization of the same are two major limiting factors to enhance those facilities.

American Journal of Theoretical and Applied Statistics, 2015

This paper proposed a transformed method of SUR model which provided unbiased estimation in case ... more This paper proposed a transformed method of SUR model which provided unbiased estimation in case of two and three equations of high and low co-linearity for both small and large datasets. The generalized least squares (GLS) method for estimation of seemingly unrelated regression (SUR) model proposed by Zellner (1962), Srivastava and Giles (1987),provided higher MSE. Although the Ridge estimators proposed by Alkhamisi and Shukur (2008) provided smaller MSE in comparison with others, it was not unbiased in case of severe multicollinearity.This study showed that our proposed method typically provided unbiasedestimator with lower MSE and TMSE than traditional methods.

Journal of Structural Engineering, 2012

This paper presents an optimization approach to the design of simply supported, post-tensioned, p... more This paper presents an optimization approach to the design of simply supported, post-tensioned, prestressed concrete I-girder bridges. The objective is to minimize the total cost of the structure, considering cost of materials, fabrication, and installation. For a particular girder span and bridge width, the design variables considered for cost minimization of the bridge system are girder spacing, various crosssectional dimensions of the girder, number of strands per tendon, number of tendons, tendon layout and configuration, slab thickness, slab rebar, and shear rebar for the girder. Explicit constraints on the design variables are developed on the basis of geometric requirements, practical conditions for construction, and code restrictions. Implicit constraints for design are formulated as per the American Association of State Highway and Transportation Officials (AASHTO) Standard Specifications. The optimization problem is characterized by having a combination of continuous, discrete, and integer sets of design variables and multiple local minima. An optimization algorithm, evolutionary operation (EVOP), is used that is capable of locating directly with high probability the global minimum without requiring information on gradient or subgradient of the objective function. The present optimization approach is used for a real-life bridge project, leading to a feasible and acceptable design resulting in around 35% savings in cost per square meter of the deck area. Computational time required for optimization of the present problem is only a few seconds. Because constant design parameters have influence on the optimum design, this cost minimization procedure is performed for a range of such parameters.