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Development of Environment Friendly Paddy Ecosystem for Sustainable Rice Farming through Soil Amendments with Biochar and Alternate Wetting-Drying Irrigations

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American Journal of Climate Change 2021年第4期10卷 581-596页

作者： Muhammad Aslam Ali md. Rajib Hassan Zubair Al islam Sanjit Chandra Barman Badiuzzaman Khan Rehana Khatun Hafsa Jahan Hiya md. touhidul islam Department of Environmental Science Bangladesh Agricultural University Mymensingh Bangladesh Department of Irrigation and Water Management Bangladesh Agricultural University Mymensingh Bangladesh

Climate change may badly affect the availability of water and soil nutrients to rice plant. Research experiments were conducted at the Environmental Science Departmental field, Bangladesh Agricultural University, Mymensingh during July 2017 to June 2019, to find out the suitable combination of biochar with inorganic fertilizers for minimizing seasonal yield scaled CH4 emissions, reducing global warming potentials (GWPs) and sustainable rice farming under feasible irrigation practices. There were ten experimental treatments with different combinations of inorganic NPKS fertilizers and biochar (15 - 30 t/ha) under conventional flooding (CF) and alternate wetting-drying irrigations (AWDI). This study revealed that NPKS fertilization (50% of the recommended doze) with 15 t/ha biochar amendments under AWD irrigation maximized rice yield 6750 kg/ha and 4380 kg/ha in dry boro and wet aman seasons respectively, while the lowest rice yield 1850 kg/ha and 1550 kg/ha were recorded in continuously irrigated control treatment (T1) during the dry and wet seasons respectively. Seasonal cumulative CH4 emission, yield scaled CH4 emission and GWPs were suppressed significantly with biochar amendments 15 - 30 t/ha under both conventional and AWDI irrigation systems during the wet and dry seasons of rice cultivation. Significant interactions were observed among biochar amendments and irrigation practices during the dry boro rice cultivation. Dry seasonal cumulative CH4 emissions were decreased by 14.7%, 18.9% and 24.8% with biochar amendments at 15 t/ha, 20 t/ha and 30 t/ha respectively under conventional irrigation;while cumulative CH4 emissions were reduced by 10.6%, 26% and 41.6% respectively, under AWDI system. Finally, total global warming potentials (GWPs) were decreased by 6% - 15%, 13% - 30% with biochar amendments under conventional and AWDI irrigations respectively, in wet season;while global warming potentials

关键词： CH4 Flux GWPs AWDI Yield Scaled CH4 Emission Dry Boro Rice Rainfed Aman Rice

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Low Profile UHF Antenna Design for Low Earth-Observation CubeSats

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Computers, Materials & Continua 2022年第5期71卷 2533-2542页

作者： md.Amanath Ullah touhidul Alam Ali F.Almutairi Mohammad Tariqul islam School of Electrical and Data Engineering Faculty of Engineering and Information TechnologyUniversity of Technology SydneyUltimo NSW2007Australia Space Science Centre(ANGKASA) Institute of Climate Change(IPI)Universiti Kebangsaan MalaysiaBangi43600SelangorMalaysia Department of CSE International Islamic University Chittagong(IIUC)Chattogram4318Bangladesh Electrical Engineering Department Kuwait University13060KuwaitCityKuwait Department of Electrical Electronic and Systems EngineeringFaculty of Engineering and Built EnvironmentUniversiti Kebangsaan MalaysiaBangi43600SelangorMalaysia

This paper reveals a new design of UHF CubeSat antenna based on a modified Planar Inverted F Antenna(PIFA)for CubeSat *** design utilizes a CubeSat face as the ground *** is a gap of 5 mm beneath the radiating element that facilitates the design providing with space for solar *** prototype is fabricated using Aluminum metal sheet and *** antenna achieved resonance at 419 *** of the antenna has been investigated after placing a solar *** properties of solar panels made the resonance shift about 20 *** design addresses the frequency shifting issue after placing the antenna with the CubeSat *** phenomenon has been analyzed considering a typical 1U and 2U CubeSat body with the *** antenna achieved a positive realized gain of 0.7 dB and approximately 78%of efficiency at the resonant frequency with providing 85%of open space for solar irradiance onto the solar panel.

关键词： CubeSat antenna UHF antenna small satellite satellite communication

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Inkjet Printed Metamaterial Loaded Antenna for WLAN/WiMAX Applications

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Computers, Materials & Continua 2022年第5期71卷 2271-2284页

作者： Farhad Bin Ashraf touhidul Alam md.Tarikul islam Mandeep Jit Singh Norbahiah Binti Misran Mohammad Tariqul islam Department of Electrical Engineering Polytechnique MontréalMontréalQC H3T 1J4Canada Space Science Centre(ANGKASA) Institute of Climate Change(IPI)Universiti Kebangsaan MalaysiaBangi43600SelangorMalaysia Department of Electrical Electronic and Systems EngineeringFaculty of Engineering and Built EnvironmentUniversiti Kebangsaan MalaysiaMalaysia

In this paper,the design and performance analysis of an Inkjetprinted metamaterial loaded monopole antenna is presented for wireless local area network(WLAN)and worldwide interoperability for microwave access(WiMAX)*** proposed metamaterial structure consists of two layers,one is rectangular tuning fork-shaped antenna,and another layer is an inkjet-printed metamaterial *** metamaterial layer is designed using four split-ring resonators(SRR)with an H-shaped inner structure to achieve negative-index metamaterial *** metamaterial structure is fabricated on low-cost photo paper substrate material using a conductive inkbased inkjet printing technique,which achieved dual negative refractive index bands of 2.25–4.25 GHz and 4.3–4.6 *** antenna is designed using a rectangular tuning fork structure to operate at WLAN and WiMAX *** antenna is printed on 30×39×1.27 mm3 Rogers RO3010 substrate,which shows wide impedance bandwidth of 0.75 GHz(2.2 to 2.95 GHz)with 2 dB realized gain at 2.4 *** integrating metamaterial structure,the impedance bandwidth becomes 1.25 GHz(2.33 to 3.58 GHz)with 2.6 dB realized gain at 2.4 *** antenna bandwidth and gain have been increased using developed quad SRR based metasurface by 500 MHz and 0.6 dBi ***,the proposed quad SRR loaded antenna can be used for 2.4 GHz WLAN bands and 2.5 GHz WiMAX *** contribution of this work is to develop a cost-effective inject printed metamaterial to enhance the impedance bandwidth and realized the gain of a WLAN/WiMAX antenna.

关键词： Metamaterial epsilon negative antenna split ring resonator WiMAX WLAN

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Scalable Process to Develop Durable Conductive Cotton Fabric

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Advanced Fiber Materials 2020年第6期2卷 291-301页

作者： md.Abdullah Al.Mamun md.touhidul islam md.Momtaz islam Kazi Sowrov md.Afzal Hossain Dewan Murshed Ahmed Hasan Shahariar Bangladesh University of Textiles Dhaka 1208Bangladesh University of Manchester ManchesterUK Funxion Wear IncRaleighNC 27606USA

Developing a scalable process is critical to manufacture conductive fabric for commercial *** paper describes a scalable coating process that is compatible with existing industrial finishing processes of *** this process,the fabric is continuously dipped in water-based metal salt and the reducing agent solution to impart conductive particles on the fiber *** 10 consecutive cycles of dip coating,the fabric shows 6Ω/*** *** process is tuned to minimize process cost and material cost,and maximize the durability of the *** paper also introduces an easy protective coating technique of the conductive fabric that improves the durability of the conductive fabric without sacrificing the comfort properties of textile fabrics such as breathability and *** encapsulated conductive fabric shows good air-permeability and it is 6.96 cm^(3)/cm^(2)/***,the conductivity of the encapsulated fabric is quite stable after four accelerated washing ***,the fabric remains conductive on the surfaces and is suitable for using as a conductive track and connectors.

关键词： Conductive fabric Scalable process Layer by layer deposition Durability

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Social Media Cyberbullying Detection on Political Violence from Bangla Texts Using Machine Learning Algorithm

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Journal of Intelligent Learning Systems and Applications 2023年第4期15卷 108-122页

作者： md. Tofael Ahmed Almas Hossain Antar Maqsudur Rahman Abu Zafor Muhammad touhidul islam Dipankar Das md. Golam Rashed Department of Information and Communication Technology Comilla University Comilla Bangladesh Department of Information and Communication Engineering University of Rajshahi Rajshahi Bangladesh Department of Electrical & Electronics Engineering University of Rajshahi Rajshahi Bangladesh

When someone threatens or humiliates another person online by sending those unpleasant messages or comments, this is known as Cyberbullying. Recently, Bangla text has been used much more often on social media. People communicate with others on social media through messages and comments. So bullies use social media as a rich environment to bully others, especially on political issues. Fights over Cyberbullying on political and social media posts are common today. Most of the time, it does a lot of damage. However, few works have been done for monitoring Bangla text on social media & no work has been done yet for detecting the bullying Bangla text on political issues due to the lack of annotated corpora and morphologic analyzers. In this work, we used several machine learning classifiers & a model. That will help to detect the Bangla bullying texts on social media. For this work, 11,000 Bangla texts have been collected from the comments section of political Facebook posts to make a new dataset and labelled the data as either bullied or not. This dataset has been used to train the machine learning classifier. The results indicate that Random Forest achieves superior accuracy of 91.08%.

关键词： Cyberbullying Bangla Texts Political Issues Machine Learning Random Forest Social Media

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The Basic Layout of a Denim Textile Industry:A Basic Review

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Journal of Management Science & Engineering Research 2022年第1期5卷 1-16页

作者： md.touhidul islam md.Nahid Hassan Department of Textile Engineering Mawlana Bhashani Science and Technology UniversityTangailDhakaBangladesh

Denim was produced in the city of Nîmes in France and was originally called the serge de Nî*** word denim is an English colloquialism of the French term:"denim."Day by day Bangladesh denim sector very much developed and helps to increase *** have seen a significant increase in investing in denim fabric manufacturing,increasing the country’s production performance by reducing fabric dependence on *** is important due to its aspects of durability,and not easily torn which benefited physical laborers *** government also plays a vital role in denim textile *** paper shows different section of denim textile industry such as:sewing section,cutting section,washing,IE and finishing *** main aim of this paper is how to role all the section of denim textile *** education is insufficient without industry attachment,which bridges the gap between theoretical and practical aspects and acclimates students to the industrial *** can gain about theoretical development on an industrial level from this *** can understand more about the machines used in various departments,their technical specifications,characteristics,operating system,and so on,and we believe that without this type of industrial connection,it is impossible to obtain industry-based information about textile engineering *** Industrial Attachment on Denim Manufacturing Technology was used to organize this study(sewing section,cutting,IE,washing section,CAD Section,and finishing *** operating procedures for the production of denim in the industry are presented in this *** technique and process of several procedures and processes are presented here such as machine specifications,manpower,maintenance,layout of the different section,dye processes and wet processes.

关键词： Denim Administration Management Manpower Washing

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Activated Carbon Precursors Derived from Jute Fiber:Social,Economic and Environmental Development

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Non-Metallic Material Science 2022年第2期4卷 49-57页

作者： md.touhidul islam Department of Textile Engineering Mawlana Bhashani Science and Technology UniversityTangailDhaka1902Bangladesh

Activated carbon fiber(ACF)is undoubtedly one of the most significant carbon nanocomposite materials to consider from the perspective of application in *** to other commercial porous storage materials,it offers many *** a fiber-like shape and a clearly defined porosity structure,activated carbon fiber(ACF)is a potential microporous *** general,synthetic carbon fiber(CF)can be used to commercially make ACF with the inclusion of an activation *** packing density,outstanding volumetric capacity,rapid adsorption/desorption,and ease of handling are some of the unique properties of *** production expenses of ACF are made up of fiber processing costs and activation costs,both of which are comparatively more expensive than those of other activated ***,researchers have indicated that the manufacturing of ACF from less expensive precursors might be accomplished by preparing activated carbon(AC)from agricultural *** comparison to synthetic ACF,there were fewer details and publicly accessible sources of information about these natural fiber derived *** cost of processing fiber is higher and shaping fiber into the correct shape is *** this study,social and environmental compliance,economic development,advantages of carbon fiber,and applications of carbon fiber are discussed.

关键词： Carbon fiber Biodegradability Precursors Derivation

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Carbon Fiber from Biomass Sources:A Comprehensive Review

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Non-Metallic Material Science 2023年第1期5卷 14-26页

作者： md.touhidul islam md.Shahin Howlader Din Mohamad Shuvo md.Kamal Uddin Department of Textile Engineering Mawlana Bhashani Science and Technology UniversityTangailDhaka1902Bangladesh

Global energy demand is rising,fossil fuel prices are rising,fossil fuel reserves are running out,and fossil fuel use contributes to the greenhouse *** a clean alternative source of energy to fossil fuels,biomass is becoming more and more *** fiber(CF),often known as graphite fiber,is a thin,strong,and adaptable material utilized in both structural(capacity)and non-structural applications(e.g.,thermal insulation).Precursors are the raw materials used to create carbon fiber,which is mostly derived from fossil *** of the high cost of precursors and manufacture,carbon fiber has only found employment in a few numbers of high-performance structural materials(e.g.,aerospace).To reduce the price of CF and reliance on fossil fuels,numerous alternative precursors have been studied throughout the years,including biomass-derived precursors such as rayon,lignin,glycerol,and lignocellulosic *** study’s goal is to present a detailed study of biomass-derived CF precursors and their market *** authors look into the viability of producing CF from these precursors,as well as the state of technology,potential applications,and cost of production(when data are available).We go over their benefits and *** also talk about the physical characteristics of CF made from biomass and contrast them with CF made from polyacrylonitrile(PAN).Additionally,we go into bio-based CF manufacturing and end-product concerns,logistics for biomass feedstock and plant sites,feedstock competition,and risk-reduction *** paper offers a comprehensive overview of the CF potential from all biomass sources and can be used as a resource by both novice and seasoned professionals who are interested in producing CF from non-traditional sources.

关键词： Carbon fibre Polyacrylonitrile Biomass Lignocellulosic

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Sustainable Textile Industry:An Overview

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Non-Metallic Material Science 2022年第2期4卷 15-32页

作者： md.touhidul islam Rounak Jahan Maksura Jahan md.Shahin Howlader Riyadul islam md.Maidul islam md.Sanowar Hossen Amit Kumar Adnan Habib Robin Department of Textile Engineering Mawlana Bhashani Science and Technology UniversityTangail-1902DhakaBangladesh Department of Electrical and Electronics Engineering American International UniversityBangladesh Department of Environmental Science and Resource Management Mawlana Bhashani Science and Technology UniversityTangail-1902DhakaBangladesh Department of Business administration Mawlana Bhashani Science and Technology UniversityTangail-1902DhakaBangladesh Department of Economics Noakhali Government College Under National UniversityBangladesh

The purpose of this study was to offer a general concept and overview of the textile industry’s environmental sustainability *** textile and garment industries cause environmental damage at every stage of manufacturing,from the cultivation of raw materials through the disposal of finished *** loading,high water consumption,high energy consumption,air pollution,solid waste,and odour creation are all key environmental concerns in the textile *** achieve sustainable production,it is necessary to examine the performance of the textile sector while considering the three elements of *** study and locate recent and related works,five keywords were used:environmental;sustainability;eco-design;manufacturer;supply chain *** through the life cycle of textile products,the textile sector has a substantial environmental *** paper illustrates how the textile industry may use strategic ways to improve ecologically sustainable textile product usage and manufacturing.A discussion is focused on how to be increased sustainability in the textile *** paper introduces key principles for ecologically sustainable business practices to consider(e.g.,eco-design,corporate social responsibility,and green supply chain management).It is critical that all stakeholders in the textile industry,including consumers,producers,environmental protection is emphasized in the manufacture and use of textile goods by the distribution chain and customers.

关键词： Sustainable Industry Eco-design Manufacturer

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Sustainable Development of Apparel Industry in Bangladesh:A Critical Review

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Journal of Management Science & Engineering Research 2022年第2期5卷 45-62页

作者： md.touhidul islam md.Nahid Hassan Mohasin Kabir md.Adnan Habib Robin md.Mashrat Hasan Farabi md.Alauddin Department of Textile Engineering Mawlana Bhashani Science and Technology UniversityTangail-1902DhakaBangladesh Department of Economics Noakhali Government College Under National UniversityBangladesh

*** textile and apparel employees especially over four million *** this major industrial sector,it is critical to encourage *** the apparel market and corporations focus on environmentally friendly products,Bangladesh’s textile and apparel sectors remain far behind,putting the country at risk of losing market *** is right of passage to implement techniques and a long-term strategy to *** apparel industries are currently facing significant issues in terms of labor *** garment manufacturers,fires are a common *** of workers have perished because of these *** to Bangladesh’s fire and safety difficulties,several foreign purchasers have already opted not to do business with the country ***,workers receive the world’s lowest pay,which leaves them dissatisfied and frequently results in conflicts and violence during protests poor *** study is conveyed based on theoretical,analytical,and statistical *** goal of this study is to represent the overall picture of sustainability in the apparel industry in *** study illustrates on using a life cycle approach to assessing manufactured products for environmental indicators to attain sustainability,fast fashion,government policy of sustainability,new method and material of garments and compare with the lifestyle of Europe against *** paper investigated Bangladesh’s garment industry’s working environment,fire,and safety hazards,and made suggestions for important environmental and sustainability *** study is helpful to all the people because sustainability is the main concern in a day.

关键词： Sustainable Apparel industry Fashion Environment

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