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Chinese Birds 2016年第3期7卷 174-179页

作者： Mominul Islam Nahid Frode Fossoy sajeda begum Eivin Roskaft Bard G.Stokke Department of Biology Norwegian University of Science and Technology(NTNU) Department of Zoology Jahangirnagar University

The Plaintive Cuckoo(Cacomantis merulinus) is a widespread brood parasite in Asia, but no data on host species utilization in Bangladesh exist. By searching for nests of all possible host species of the Plaintive Cuckoo at Jahangirnagar university campus, north of Dhaka, we were able to determine which hosts were used in this area. We found that the Common Tailorbird(Orthotomus sutorius) was the only potential host used by Plaintive Cuckoos, and parasitism rate was rather high(31.3 %, n = 16). However, both host and cuckoo breeding success was poor(0 %, n = 16) due to frequent nest predation. Details on host and cuckoo egg appearance are provided. Our findings indicate that Common Tailorbirds are common hosts of the Plaintive Cuckoo in Central Bangladesh.

关键词： Brood parasitism Plaintive Cuckoo Cacomantis merulinus Common Tailorbird Orthotomus sutorius Bangladesh

Examining techno-economic interactions among fish species:A case of small-scale demersal fishery

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Aquaculture and Fisheries 2024年第4期9卷 682-695页

作者： Jaynab begum Yousuf Shekar Bose Humanities Research Centre Sultan Qaboos UniversityP.O Box 34Muscat123Oman Sultan Qaboos University Al KhoudMuscat123Oman Queen Street Brisbane CityQueensland4000Australia

Using the multi-product dual revenue function framework,this paper examines the nature and extent of technical and economic interactions among five demersal species of Al-Batinah demersal fishery,Oman during the 2010-2016 *** parameters of the system of output supply functions are estimated using Zellner’s seemingly unrelated regressions(SUR)*** likelihood ratio test in relation to the structure of the multi-output production technology rejects the null-hypothesis of input-output separability and non-jointness in *** results suggest that the underlying production technology is non-separable between the outputs and the quasi-fixed input,and the harvesting level of one species is likely to have spill-over economic effects on the harvesting levels of *** own-price elasticities of output supply are found to be positive,inelastic,and statistically significant in four out of five cases suggesting that,other things being equal,fishers’supply decisions are influenced by the prevailing market prices of *** estimated values of the cross-price elasticity of supply are negative,inelastic and statistically significant at the 5%level for eight output *** calculated values of the Morishima elasticity of substitution(MES)indicate the presence of substitutability between ten output *** cross-price elasticity estimates are in the range of􀀀0.001(between Emperor and Catfish)to􀀀0.275(between Seabream and Grouper)which is lower(in absolute value)than that of the MES *** magnitudes of the cross-price elasticity and the MES estimates indicate the extent of spill-over effects of one species on the other and signal the extent of species targeting by fishers.A statistically significant spatial,seasonal,and inter-annual variability is observed in all species ***,the implications of the findings are discussed from the perspective of developing effective management approaches,achieving sustainability of fisheries resource

关键词： Multi-product technology Separability Non-jointness Supply responses Targeting Small-scale fisheries Oman

Are gender inclusiveness and rural transformation interlinked?The case of Bangladesh

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Journal of Integrative Agriculture 2024年第6期23卷 2112-2126页

作者： Maria Fay Rola-Rubzen Mohammad Jahangir Alam Jon Marx Sarmiento Ismat Ara begum Al Amin Al Abbasi Subrata Saha UWA School of Agriculture and Environment The University of Western AustraliaPerth 6009Australia Department of Agribusiness and Marketing Bangladesh Agricultural UniversityMymensingh-2202Bangladesh Department of Agricultural Economics Bangladesh Agricultural UniversityMymensingh-2202Bangladesh

Gender inclusiveness is important in the rural transformation process of Bangladesh as rural women play key roles in both agricultural and non-agricultural *** inclusiveness also leads to gender *** empirically evaluate relationships between rural transformation and gender inclusiveness in *** consider three rural transformation indicators:high-value commodities’share in agricultural output values,non-farm employment’s share in rural labor employment,and non-agricultural GDP’s share in total *** capturing gender inclusiveness include the per capita rural income of males and females,ratio of investments into gender programs,female access to education,access to healthcare,employment participation,land ownership,and asset *** test the effect of the difference in per capita rural income of males and females and the ratio of their incomes and check for the robustness of the gender variables across different model *** 128 district-level observations from 32 districts of Bangladesh across four time periods(2000,2005,2010 and 2016),we use both ordinary least squares and fixed effects panel regression *** find that female land and asset ownership and access to education and healthcare are robust determinants of various stages of rural ***,our results suggest that improving women’s ownership of land and assets and investing in women’s education and healthcare will likely contribute to a more inclusive rural transformation.

关键词： rural transformation Bangladesh gender inclusiveness investments on women

Advances in DNA methylation and its role in cytoplasmic male sterility in higher plants

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Journal of Integrative Agriculture 2024年第1期23卷 1-19页

作者： Atiqur Rahman Hasan Sofiur Rahman Shakil Uddin Naima Sultana Shirin Akhter Ujjal Kumar Nath Shamsun Nahar begum Mazadul Islam Afroz Naznin Nurul Amin Sharif Ahmed Akbar Hossain Department of Genetics and Plant Breeding Bangladesh Agricultural UniversityMymensingh 2202Bangladesh Plant Breeding Division Bangladesh Institute of Nuclear AgricultureMymensingh 2202Bangladesh Tuber Crop Research Centre Bangladesh Agricultural Research Institute(BARI)Joydebpur 1701Bangladesh Horticulture Research Centre Bangladesh Agricultural Research Institute(BARI)Joydebpur 1701Bangladesh Biotechnology Division Bangladesh Agricultural Research Institute(BARI)Joydebpur 1701Bangladesh International Rice Research Institute Bangladesh OfficeDhaka 1213Bangladesh Division of Soil Science Bangladesh Wheat and Maize Research InstituteDinajpur 5200Bangladesh

The impact of epigenetic modifications like DNA methylation on plant phenotypes has expanded the possibilities for crop *** methylation plays a part in the regulation of both the chromatin structure and gene expression,and the enzyme involved,DNA methyltransferase,executes the methylation process within the plant *** regulating crucial biological pathways,epigenetic changes actively contribute to the creation of the ***,epigenome editing may assist in overcoming some of the drawbacks of genome editing,which can have minor off-target consequences and merely facilitate the loss of a gene’s *** drawbacks include gene knockout,which can have such off-target *** review provides examples of several molecular characteristics of DNA methylation,as well as some plant physiological processes that are impacted by these epigenetic changes in the *** also discuss how DNA alterations might be used to improve crops and meet the demands of sustainable and environmentally-friendly farming.

关键词： DNA methylation epigenetics CMS male sterility chromatin architecture gene expression higher plants

Characteristics of Multi-Objective Linear Programming Problem and Multi-Objective Linear Fractional Programming Problem Taking Maximum Value of Multi-Objective Functions

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Applied Mathematics 2024年第1期15卷 22-32页

作者： Samsun Nahar Md. Asadujjaman Khadiza begum Mahede-Ul-Hassan Md. Abdul Alim Department of Basic Sciences and Humanities University of Asia Pacific Dhaka Bangladesh Department of Mathematics University of Dhaka Dhaka Bangladesh Computer Science and Engineering Department Prime University Dhaka Bangladesh Department of Mathematics and Statistics Bangladesh University of Business and Technology Dhaka Bangladesh Department of Mathematics Bangladesh University of Engineering and Technology Dhaka Bangladesh

In this paper, a new statistical averaging technique is proposed for finding an optimal solution to a multi-objective linear fractional programming problem (MOLFPP) and multi-objective linear programming problem (MOLPP) by using new arithmetic averaging method and new geometric averaging method. It is significantly noticeable same characteristics among all the technique while taking maximum or minimum among all optimized values for multi-objective functions using simplex algorithm. The characteristics provided from the problems are verified by the numerical examples.

关键词： MOLPP MOLFPP New Arithmetic Averaging Method New Geometric Averaging Method

Lexicon and Deep Learning-Based Approaches in Sentiment Analysis on Short Texts

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Journal of Computer and Communications 2024年第1期12卷 11-34页

作者： Taminul Islam Md. Alif Sheakh Md. Rezwane Sadik Mst. Sazia Tahosin Md. Musfiqur Rahman Foysal Jannatul Ferdush Mahbuba begum Department of Computer Science and Engineering Daffodil International University Dhaka Bangladesh Department of Computer Science Southern Illinois University Carbondale IL USA Department of Economics & Decision Sciences University of South Dakota Vermillion SD USA Department of Computer Science and Engineering Jashore University of Science and Technology Jashore Bangladesh Department of Computer Science and Engineering Mawlana Bhashani Science and Technology University Tangail Bangladesh

Social media is an essential component of our personal and professional lives. We use it extensively to share various things, including our opinions on daily topics and feelings about different subjects. This sharing of posts provides insights into someone’s current emotions. In artificial intelligence (AI) and deep learning (DL), researchers emphasize opinion mining and analysis of sentiment, particularly on social media platforms such as Twitter (currently known as X), which has a global user base. This research work revolves explicitly around a comparison between two popular approaches: Lexicon-based and Deep learning-based Approaches. To conduct this study, this study has used a Twitter dataset called sentiment140, which contains over 1.5 million data points. The primary focus was the Long Short-Term Memory (LSTM) deep learning sequence model. In the beginning, we used particular techniques to preprocess the data. The dataset is divided into training and test data. We evaluated the performance of our model using the test data. Simultaneously, we have applied the lexicon-based approach to the same test data and recorded the outputs. Finally, we compared the two approaches by creating confusion matrices based on their respective outputs. This allows us to assess their precision, recall, and F1-Score, enabling us to determine which approach yields better accuracy. This research achieved 98% model accuracy for deep learning algorithms and 95% model accuracy for the lexicon-based approach.

关键词： Opinion Mining Lexicon Analysis Twitter Data LSTM Machine Learning

A New Compression Scheme for Secure Transmission

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International Journal of Automation and computing 2013年第6期10卷 578-586页

作者： M.Baritha begum Y.Venkataramani Saranathan College of Engineering

Encryption techniques ensure security of data during transmission. However, in most cases, this increases the length of the data, thus it increases the cost. When it is desired to transmit data over an insecure and bandwidth-constrained channel, it is customary to compress the data first and then encrypt it. In this paper, a novel algorithm, the new compression with encryption and compression （CEC）, is proposed to secure and compress the data. This algorithm compresses the data to reduce its length. The compressed data is encrypted and then further compressed using a new encryption algorithm without compromising the compression efficiency and the information security. This CEC algorithm provides a higher compression ratio and enhanced data security. The CEC provides more confidentiality and authentication between two communication systems.

关键词： Data compression encryption algorithm compression with encryption and compression (CEC) algorithm Huffmancoding run length coding bits per character (BPC).

A Brief Study on the Ignition of the Non-Thermal Atmospheric Pressure Plasma Jet from a Double Dielectric Barrier Configured Plasma Pencil

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Plasma Science and Technology 2013年第7期15卷 627-634页

作者： Asma begum Mounir LAROUSSI M. R. PERVEZ School of Engineering and Computer Science Independent UniversityDhaka Bangladesh Department of Electrical and Computer Engineering Old Dominion UniversityUSA Department of Physics Master Mind CollegeDhaka Bangladesh

To understand the self sustained propagation of the plasma jet/bullet in air under atmospheric pressure, the ignition of the plasma jet/bullet, the plasma jet/bullet ignition point in the plasma pencil, the formation time and the formation criteria from a dielectric barrier configured plasma pencil were investigated in this study. The results were confirmed by comparing these results with the plasma jet ignition process in the plasma pencil without a dielectric barrier. Electrical, optical, and imaging techniques were used to study the formation of the plasma jet from the ignition of discharge in a double dielectric barrier configured plasma pencil. The investigation results show that the plasma jet forms at the outlet of the plasma pencil as a donut shaped discharge front because of the electric field line along the outlet＇s surface. It is shown that the required time for the formation of the plasma jet changes with the input voltage of the discharge. The input power calculation for the gap discharge and for the whole system shows that 56% of the average input power is used by the first gap discharge. The estimated electron density inside the gap discharge is in the order of 1011 cm^-3. If helium is used as a feeding gas, a minimum 1.48× 10^-8 C charge is required per pulse in the gap discharge to generate a plasma jet.

关键词： plasma jet/bullet bullet formation dielectric barrier discharge non-thermalatmospheric pressure plasma

Semi-continuous casting of magnesium alloy AZ91 using a filtered melt delivery system

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Journal of Magnesium and Alloys 2015年第4期3卷 283-301页

作者： Mainul Hasan Latifa begum Department of Mining&Materials Engineering McGill UniversityM.H.Wong Building3610 University StreetMontrealQC H3A 0C5Canada

A 3-D numerical simulation of an industrial-sized slab caster for magnesium alloy AZ91 has been carried out for the steady state operational phase of the *** simulated model consists of an open-top melt delivery system fitted with a porous filter near the *** melt flow through the porous filter was modeled on the basis of Brinkmann-Forchimier-Extended non-Darcy model for turbulent *** in-house 3-D CFD code was modified to account for the melt flow through the porous *** are obtained for four casting speeds namely,40,60,80,and 100 mm/*** metal-mold contact region as well as the convective heat transfer coefficient at the mold wall were also *** addition to the above,the Darcy number for the porous media was also *** parametric studies were performed for a fixed inlet melt superheat of 64℃.The results are presented pictorially in the form of temperature and velocity *** sump depth,mushy region thickness,solid shell thickness at the exit of the mold and axial temperature profiles are also presented and correlated with the casting speed through regression analysis.©2015 Production and hosting by Elsevier *** behalf of Chongqing University.

关键词： Magnesium alloy AZ91 VDC casting Slab caster 3D CFD modeling Porous filter Non-Darcy model Turbulent melt flow Solidification Mushy region

On numerical modeling of low-head direct chill ingot caster for magnesium alloy AZ31

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Journal of Magnesium and Alloys 2014年第4期2卷 275-286页

作者： Mainul Hasan Latifa begum Department of Mining&Materials Engineering McGill UniversityM.H.Wong Building3610 University StreetMontrealQC H3A 0C5Canada

A comprehensive 3D turbulent CFD study has been carried out to simulate a Low-Head(LH)vertical Direct Chill(DC)rolling ingot caster for the common magnesium alloy *** model used in this study takes into account the coupled laminar/turbulent melt flow and solidification aspects of the process and is based on the control-volume finite-difference *** the aluminum/magnesium DC casting industrial practices,the LH mold is taken as 30 mm with a hot top of 60 *** previously verified in-house code has been modified to model the present casting *** quantitative results are obtained for four casting speeds,for three inlet melt pouring temperatures(superheats)and for three metal-mold contact heat transfer coefficients for the steady state operational phase of the *** variable cooling water temperatures reported by the industry are considered for the primary and secondary cooling zones during the ***,the temperature and velocity fields,sump depth and sump profiles,mushy region thickness,solid shell thickness at the exit of the mold and axial temperature profiles at the center and at three strategic locations at the surface of the slab are presented and discussed.

关键词： Low-head DC caster Magnesium alloy AZ31 3D CFD modeling Turbulent melt flow Solidification Mushy region thickness Sump profile