Structure-based magnetic, electrical and transport properties of Ni–Zn–Co ferrite by V5+ substitution

Hossain M.D.,Khan M.N.I.,Hossain Md Sarowar,Ahned S.J.,Alam M.K.,Liba S.I.,Hakim M.A.,Jamil A.T.M.K. 한국물리학회 2022 Current Applied Physics Vol.43 No.-

This article presents the modification of structure-based magnetic, electronic and transport properties along with the conduction mechanism and its relaxation process in a Ni–Zn–Co ferrite tailored by V5+ substitution at B-site replacing Fe3+ ions. The composition Ni0.7Zn0.2Co0.1Fe2-xVxO4 (0≤ x≤ 0.12) was synthesized by standard solid-state reaction method and all samples were crystallized with a single-phase cubic spinel structure belonging to the Fd3m space group. The lattice constants decreased gradually from 8.3673≽A to 8.3602≽A and the average grain sizes (DSEM) are also decreased from 6.92 μm to 1.99 μm due to V5+ ions substitution at Fe3+ of B-site. However, more than 25% of Fe3+ ions migrate to A-site from B-site due to V5+ substitution at Fe3+ of B-site. In all samples θD does not strictly follow the Anderson’s prediction, rather it monotonically decreases to a low value until x = 0.12. Magnetic phase transition temperature shifted to the lower temperature and the net magnetization (ηeB) decreases due to V5+ substitution in Ni–Zn–Co ferrite. Apart this, during conduction charge carriers should require more energy to jump from one cationic site to other for V5+ substitution in the Ni–Zn–Co ferrite and the activation energy (Ea) is much more higher in V5+ substituted sample. Moreover, long-range interaction with localized relaxation mechanism is observed in V5+ doped samples. The resistance at the grain (Rg) is maximum (243.09 Ω) for the sample x = 0.10 while grain boundary resistance (Rgb) is maximum (5.98×105 Ω) for the sample x = 0.07. However, the higher value of ρdC for x = 0.12 sample ensures to be suitable for electromagnets, transformers, electronic inductors, and at high-frequency applications. Moreover, x = 0.07 sample displays high value of TCR ( -8.6%/K at 418 K) which may be utilized as an infrared detector for night vision bolometer material.

Measurement of Neutron Total Cross Section and Resonance Parameters of Natural Hafnium at Pohang Neutron Facility

A. K.M.M.H. Meaze,Guinyun Kim,Dongchul Son,Hengsik Kang,Hossain Ahmed,In Soo Ko,Jong Hwa Chang,Kun Joong Yoo,Moo-Hyun Cho,Tae-Ik Ro,Won Namkung,Won-Chung Chung,Young Seok Lee,Young-Ae Kim 한국물리학회 2005 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.46 No.2

W. measure. tota. neutro. cross-section. o. natura. hafniu. i. th. neutro. energ. regio. fro. 0.. e. t. 10. e. b. usin. th. neutro. time-of- igh. metho. a. th. Pohan. Neutro. Facility. whic. consist. o. a. electro. linac. . water-coole. T. targe. wit. . wate. moderator. an. a. 11-m-lon.time-of- igh. path. . 6Li-ZnS(Ag. scintillato. wit. . diamete. o. 12.. c. an. . thicknes. o. 1..c. wa. use. a. . neutro. detector. an. . natura. hafniu. meta. plate. . . . c. i. are. b. 0. m. i. thickness. wa. use. fo. th. neutro. transmissio. measurement. Th. backgroun. leve. wa. determine. b. usin. notch-lter. o. Co. In. an. C. sheets. I. orde. t. reduc. th. gamm. ray. fro. Bremsstrahlun. an. fro. neutro. capture. w. employe. . neutron-gamm. separatio. syste. base. o. thei. dieren. puls. shapes. Th. presen. measuremen. wa. compare. wit. th. previou. one. an. th. evaluate. dat. i. ENDF/B-VI. Th. resonanc. parameter. wer. extracte. fro. th. transmissio. dat. b. usin. th. compute. cod. SAMMY. whic. utilize. bot. Dopple. an. resolutio. broadenin. effect. an. Bayes. generalize. leas. square. technique.

Molecular characterization and functional annotation of a hypothetical protein (SCO0618) of Streptomyces coelicolor A3(2)

Ferdous, Nadim,Reza, Mahjerin Nasrin,Emon, Md. Tabassum Hossain,Islam, Md. Shariful,Mohiuddin, A.K.M.,Hossain, Mohammad Uzzal Korea Genome Organization 2020 Genomics & informatics Vol.18 No.3

Streptomyces coelicolor is a gram-positive soil bacterium which is well known for the production of several antibiotics used in various biotechnological applications. But numerous proteins from its genome are considered hypothetical proteins. Therefore, the present study aimed to reveal the functions of a hypothetical protein from the genome of S. coelicolor. Several bioinformatics tools were employed to predict the structure and function of this protein. Sequence similarity was searched through the available bioinformatics databases to find out the homologous protein. The secondary and tertiary structure were predicted and further validated with quality assessment tools. Furthermore, the active site and the interacting proteins were also explored with the utilization of CASTp and STRING server. The hypothetical protein showed the important biological activity having with two functional domain including POD-like_MBL-fold and rhodanese homology domain. The functional annotation exposed that the selected hypothetical protein could show the hydrolase activity. Furthermore, protein-protein interactions of selected hypothetical protein revealed several functional partners those have the significant role for the bacterial survival. At last, the current study depicts that the annotated hypothetical protein is linked with hydrolase activity which might be of great interest to the further research in bacterial genetics.

Performance Evaluation of Hadoop and Oracle Platform for Distributed Parallel Processing in Big Data Environments

A. K. M. Mahbubul Hossen,A. B. M. Moniruzzaman,Member, IEEE,Syed Akhter Hossain,Member, IEEE, ACM 보안공학연구지원센터 2015 International Journal of Database Theory and Appli Vol.8 No.5

Hadoop–a popular open-source implementation of MapReduce is widely used for the analysis of large datasets. The current Hadoop implementation assumes that computing nodes in a cluster are homogeneous in nature. In this paper we evaluate performance of Hadoop Platform and Oracle for Distributed Parallel Processing in large datasets. For evaluation, we implement a prototype of a virtual datacenter using distributed and parallel computing technology. The purpose of this paper is to reduce datacenter implementation cost using commodity hardware and provide high performance. Hadoop is installed on a commodity Linux cluster the distributed processing of large data sets across clusters of computers using distributed and parallel computing architecture. This paper also helps to explain about some new technology and framework which are open source; that can easily utilize those technologies for our complex data analysis which resembling structured, semi structured and non-structured data. Here we tried to demonstrate a performance comparison by executing some queries between distributed parallel computing system and traditional single computing system. For the simulation of the infrastructure Hadoop cluster has been used for distributed parallel processing and Oracle 11g is used for traditional single processing system. We prepare three virtual host for Hadoop cluster and a high-end hardware for Oracle 11g.

Prevalence and risk factors of helminth infections in cattle of Bangladesh

Rahman, A.K.M.A.,Begum, N.,Nooruddin, M.,Rahman, Md. Siddiqur,Hossain, M.A.,Song, Hee-Jong The Korean Society of Veterinary Service 2009 韓國家畜衛生學會誌 Vol.32 No.3

A cross-sectional survey was undertaken to identify risk factors and clinical signs associated with parasitic helminth infections of cattle in Mymensignh district of Bangladesh. A nonrandom convenience sampling method was used to select 138 animals from 40 farmers/herds. The eggs per gram of faeces (epg) for nematodes and trematodes were determined by McMaster and Stoll's methods respectively. Animal-level and herd-level data were recorded by means of a questionnaire. Multi-collinearity amongst explanatory variables were assessed using $2{\times}2{\times}\;X^2$ test and one variable in a pair was dropped if $P{\leq}0.05$ formultiple logistic regression models. Association study between outcome and explanatory variables was conducted using classification tree, random forests and multiple logistic regression. A positive epg was considered as infected. Analyses were performed using $STATA^{(R)}$, version 8.0/Intercooled and $R^{(R)}$, Version 2.3.0. Seventy eight percent of the cattle were found to be infected with at least one type of helminth. Twenty four pairs of combinations of explanatory variables showed significant associations. Male animals (OR=3.3, P=.006, 95% CI=1.4, 7.7) were associated with significantly increased prevalence of nematode infection. Female cattle of the study area are mostly cross-breed, kept indoor, fed relatively good diet and not used for draught purpose. Males are used for draught purpose thereby more exposed to nematode infective stage and provided with relatively poor diet. So stressed male cattle may become more susceptible to nematode infection. All of the three statistical techniques selected gender and lumen motility as most important variables in association with nematode infection in cattle. The result of this survey can only be extrapolated to the periurban cattle population of traditional management system.

Surface plasmonic effects on dye-sensitized solar cells by SiO₂-encapsulated Ag nanoparticles

Hossain, M.A.,Park, J.,Yoo, D.,Baek, Y.k.,Kim, Y.,Kim, S.H.,Lee, D. Elsevier 2016 Current Applied Physics Vol.16 No.3

<P>A series of dye-sensitized solar cells (DSSCs) with different amounts of silver nanoparticles (Ag NPs) coated with a SiO2 layer were prepared as core-shell Ag@SiO2 nanoparticles (Ag@SiO2 NPs). The influence of the amount of Ag@SiO2 NPs on the performance of the DSSCs was investigated. As the amount of Ag@SiO2 NPs increased, the intensity of the light-absorption spectra of the photoanodes gradually increased, whereas the amount of dye absorption was decreased. The short-circuit current density (Jsc), open-circuit voltage (V-oc), and power conversion efficiency (PCE) initially increased gradually and then decreased with increasing amounts of Ag@SiO2 NPs; the charge-transfer resistance (R-2) exhibited the opposite trend. Optimal Jsc, Voc, and PCE values of 13.85 mA/cm(2), 0.66 V, and 6.16%, respectively, were obtained in a DSSC containing 3 wt.% Ag@SiO2 NPs; this PCE is 43.25% higher than that of a photoanode without Ag@SiO2 NPs. The significant improvements in the properties of the optimal DSSC are attributed to the increase in the light coupling, which increased the light absorption of the dye, owing to the localized surface plasmon resonance of the Ag@SiO2 NPs. (C) 2016 Elsevier B.V. All rights reserved.</P>

MHD FREE CONVECTION FLOW ALONG A POROUS SURFACE

M. A. Hossain,K. C. A. Alam 대한기계학회 1992 International Conference on Fluid Machinery Vol.1 No.1

An intelligent system for the design of RC slabs

Hossain, K.M.A.,Famiyesin, O.O.R. Techno-Press 2001 Structural Engineering and Mechanics, An Int'l Jou Vol.12 No.3

The accurate finite element (FE) simulation of reinforced concrete (RC) slabs, having different boundary conditions and subjected to uniformly distributed loading, has led to the use of the developed FE models for generating results of ultimate loads from predictions of 'computer-model' RC slabs having different material and geometric properties. Equations derived from these results constitute the primary database of an intelligent computer-aided-design (CAD) system developed for accurate and fast information retrieval on arbitrary slabs. The system is capable of generating a secondary database through systems of interpolation and can be used for design assistance purposes.

EFFECT OF FEEDING STRAW SUPPLEMENTING WITH UREA MOLASSES BLOCK LICK ON THE PERFORMANCE OF SHEEP

Hossain, K.B.,Sarker, N.R.,Saadullah, M.,Beg, M.A.H.,Khan, T.M. Asian Australasian Association of Animal Productio 1995 Animal Bioscience Vol.8 No.3

The experiment was conducted to study the effect of supplementary urea molasses block lick with rice straw based diet on the performance of sheep. Six indigenous sheep of about two years of age with an average body weight of 12.88 kg, were selected for this experiment They grouped into two by stratified randomization, and the experiment was conducted for a period of 90 days. Sheep of group A was fed rice straw and group B was feed rice straw with urea molasses block lick, beside this both the groups received 66 g wheat bran and 167 g of Ipil-Ipil leaf meat. The study revealed that the average daily gain of live weight per sheep per day was 41 gm and 70 gm in group-A and group-B respectively. From the analysis of variance it was evident that live weight gain in sheep of group B, supplemented with urea molasses block lick was highly significant (p < 0.01). It was also estimated that group A required 8.12 kg DM to gain 1 kg live weight, whereas group B receiving urea molasses block lick required 5.30 kg DM to gain 1 kg live weight. Therefore, feeding rice straw with urea molasses block lick able to utilize more crop-residues efficiently.

PERFORMANCE MEASUREMENTS OF A TRACKED VEHICLE SYSTEM

A. RAHMAN,A. K. M. MOHIUDDIN,A. HOSSAIN 한국자동차공학회 2011 International journal of automotive technology Vol.12 No.4

To improve crossing ability, the most important performance factor for tracked vehicle systems operating on low-bearing capacity peats, and to minimize income losses that result from downtime and maintenance costs, a vehicle was designed in order to adapt to operating condition changes. This article describes the mobile performance of a novel vehicle with segmented rubber tracks on a low-bearing capacity peat. At an equivalent travelling speed, the novel vehicle’s tractive performance in a variable operating environment caused by changes in terrain cohesiveness and hydrodynamic responses was superior to that of the previous model. The new vehicle, which could be operated on the Sepang peat, showed a tractive effort of 42.2% of the gross vehicle weight in field experiments; the recommended minimum tractive effort is between 30 and 36% of the gross vehicle weight.