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Does environmental policy stringency alter the natural resourcesemissions nexus?Evidence from G-7 countries

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Geoscience Frontiers 2024年第5期15卷 454-466页

作者： Roni Bhowmik Arshian Sharif ahsan Anwar Qasim Raza Syed Phan The Cong Ngo Ngan Ha School of Business Guangdong University of Foreign StudiesGuangdongPeople’s Republic of China Faculty of Business&Entrepreneurship Daffodil International UniversityDhakaBangladesh Lancashire School of Buiness and Enterprise University of Central LancashirePrestonUnited Kingdom Department of Economics and Finance Sunway Business SchoolSunway UniversitySubang JayaMalaysia Adnan Kassar School of Business Lebanese American UniversityBeirutLebanon University of Economics and Human Sciences in Warsaw WarsawPoland College of International Studies Korea UniversitySeoulSouth Korea Centre for Business Informatics and Industrial Management(CBIIM) UCSI Graduate Business SchoolUCSI UniversityKuala LumpurMalaysia European University of Lefke LefkeNorthern CyprusTR-10 MersinTurkiye Universiti Sains Malaysia Malaysia Department of Business Administration ILMA UniversityKarachiPakistan Faculty of Economics Thuongmai UniversityHanoiViet Nam

Natural resource management is indispensable keeping in view their positive economic impacts as well as their detrimental environmental *** achieve certain SDGs,it is inevitable to manage natural resources through effective policies that help to inhibit adverse environmental *** on this approach,the current empirical analysis aims to probe whether environmental policy stringency intensifies,meagres,and/or halts the abysmal environmental impact of natural resources in G-7 countries(United Kingdom,United States,Canada,Italy,France,Japan,and Germany)for the period from 1990 to *** that end,we rely on the second-generation panel data approaches and panel quantile *** outcomes reveal that natural resources increase carbon dioxide emission whereas the synergy of natural resources and environmental policy stringency plunges emissions across the *** findings suggest adoption of a strict environmental policy for attaining the targets of SGD-08(economic growth),SDG-09(innovations),SDG-11(sustainable cities),SDG-12(responsible consumption of natural resources),and SDG-13(climate action).

关键词： Environmental policy stringency Natural resources CO_(2)emissions G-7 countries

Indirect photocatalytic reduction of arsenate to arsenite in aqueous solution with TiO_2 in the presence of hole scavengers

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Chinese Journal of Chemical Engineering 2018年第3期26卷 529-533页

作者： Abdus Samad Shamim ahsan Ikki Tateishi Mai Furukawa Hideyuki Katsumata Tohru Suzuki Satoshi Kaneco Department of Chemistry Jagannath University Department of Earth and Atmospheric Sciences Metropolitan State University of Denver Department of Chemistry for Materials Graduate School of Engineering Mie University Mie Global Environment Center for Education & Research Mie University

The indirect photocatalytic reduction of arsenate to arsenite in aqueous solution with titanium dioxide(TiO_2)was investigated with various hole scavengers such as methanol, ethanol, 2-propanol, formaldehyde, acetone,formic acid and acetic acid. Although the direct photocatalytic reduction of arsenate to arsenite with TiO_2 was impossible, an indirect reduction of As(V) was possible in the presence of sacrificial electron donors to form strongly reductive radicals. The addition of ethanol was very effective for indirect photocatalytic reduction of As(V) in aqueous solution with TiO_2 photocatalyst. The indirect photocatalytic reduction rate of As(V) may be related with both the reaction rate constants of reaction of hydroxyl radicals with hole scavenger and the reactivities for the radicals M· which are produced by the reaction of ·OH with hole scavenger.

关键词： Indirect photocatalytic reduction Arsenate Arsenite Titanium dioxide Hole scavenger

Density functional theory for selecting modifiers for enhanced adsorption of tetracycline in water by biochar

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Waste Disposal and Sustainable Energy 2023年第1期5卷 25-35页

作者： Sayeda Ummeh Masrura Tauqeer Abbas Hamed Heidari Shams Razzak Rothee ahsan Javed Eakalak Khan Department of Civil and Environmental Engineering and Construction University of NevadaLas Vegas4505 S.Maryland ParkwayBox 454015Las VegasNV89154-4015USA Department of Chemistry and Chemical Engineering Lahore University of Management SciencesLahorePakistan

Antibiotics and their metabolic byproducts are found in wastewater and natural water as a result of increased consumption,posing a major threat to humans and other living *** of the most promising methods for their removal is adsorption using biochar because it offers excellent adsorption potential and is both affordable and environmentally ***,raw biochar frequently has a low adsorption capacity due to its limited pore structure and unfavorable surface *** surface modifications using modifiers such as H3PO4,KOH,and NaOH have improved the surface area and thereby the adsorption *** methods for assessing the effectiveness and adsorption mechanism of modified biochar are costly and *** functional theory(DFT)was used to investigate the interfacial interactions and adsorption mechanism of tetracycline(TC),a widely used antibiotic for personal care and veterinary medication,on unmodified and modified *** DFT calculations showed that the adsorption energy of TC on unmodified and modified biochar is in the following order:KOH-modified biochar(−2.38 eV)

关键词： Tetracycline adsorption Modified biochar Density functional theory Adsorption energy Modifier screening

Metal-Doped Brushite Cement for Bone Regeneration

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Journal of Bionic Engineering 2023年第6期20卷 2716-2731页

作者： Muhammad Aqib Aneela Anwar Humayun Ajaz Samina Akbar ahsan Manzoor Maham Abid Zohaib Waheed Qudsia Kanwal Department of Chemistry University of Engineering and TechnologyGT RoadLahore54890Pakistan Department of Chemistry University of LahoreLahore5400Pakistan

For the past several years,calcium phosphate cement was used in the biomedical *** biocompatibility,good bioactivity,self-setting qualities,minimum setting degree,appropriate toughness,and simple shape to accommodate any difficult geometry are among their most notable *** phosphate has some types and brushite is one of the most attractive mineral for bone repair *** is extensively employed in filling fractures and trauma treatments as a bone substituted *** kind of material can potentially be used as a medicine delivery *** replacement of metal,such as magnesium,zinc,and strontium ions,into the calcium phosphate structure is a major research topic these *** cement has low mechanical strength and quick setting *** is possible to produce biomaterials with higher mechanical *** adding metal that are great potential in controlling cellular density when included into *** a result,it is a successful method to develop quite well regenerative *** paper provides a detailed summary of the present achievements of metal-doped brushite cement for bone repair and healing *** major purpose of this work is to give a simple but thorough analysis of current successes in brushite cement doped with Zn,Mg,Sr,and other ions as well as to highlight new advancements and *** impact of metal replacement on cement physical and chemical properties,including microstructure,setting time,injectability,mechanical property,and ion release,is *** metal-doped cement has osteogenesis,angiogenesis,and antibacterial properties,as well as their prospective utility as drug carriers,also considered.

关键词： Calcium phosphate Brushite Bone cement Metal dopants Bone regeneration

Diversification evidence of bitcoin and gold from wavelet analysis

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Financial Innovation 2023年第1期9卷 2584-2619页

作者： Rubaiyat ahsan Bhuiyan Afzol Husain Changyong Zhang Faculty of Business Curtin UniversityMiriMalaysia School of Business Swinburne University of TechnologyKuchingSarawakMalaysia

To measure the diversification capability of Bitcoin,this study employs wavelet analysis to investigate the coherence of Bitcoin price with the equity markets of both the emerging and developed economies,considering the COVID-19 pandemic and the recent Russia-Ukraine *** results based on the data from January 9,2014 to May 31,2022 reveal that compared with gold,Bitcoin consistently provides diversification opportunities with all six representative market indices examined,specifically under the normal market *** particular,for short-term horizons,Bitcoin shows favorably low correlation with each index for all years,whereas exception is observed for *** addition,diversification between Bitcoin and gold is demonstrated as well,mainly for short-term ***,the diversification benefit is conditional for both Bitcoin and gold under the recent pandemic and war *** findings remind investors and portfolio managers planning to incorporate Bitcoin into their portfolios as a diversification tool to be aware of the global geopolitical conditions and other uncertainty in considering their investment tools and durations.

关键词： Bitcoin Gold Wavelet Coherence Diversification

Two New Records of Snapper(Perciformes, Lutjanidae) from Saint Martin's Island, Bangladesh

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Journal of Ocean University of China 2021年第2期20卷 439-444页

作者： SARKAR Provakar ISLAM Md Jayedul HABIB AHMShafiullah NEOGI Amit Kumer HABIB Kazi ahsan Department of Zoology Jagannath UniversityDhaka 1100Bangladesh Aquatic Bioresource Research Laboratory Department of Fisheries Biology and GeneticsSher-e-Bangla Agricultural UniversityDhaka 1207Bangladesh Department of Fisheries Biology and Genetics Faculty of FisheriesAquaculture and Marine ScienceSher-e-Bangla Agricultural UniversityDhaka 1207Bangladesh

The present work documented two snapper species, Lutjanus fulvus Forster, 1801 and Lutjanus erythropterus Bloch, 1790, recently collected from the Saint Martin's Island, Bay of Bengal, Bangladesh, during a survey on coral associated fishes of Bangladesh from July 2017 to September 2018. These two species were identified with morphological characteristics and by analyzing partial mitochondrial COI sequences. The document also included an updated checklist of snappers available in Bangladesh.

关键词： Lutjanus fulvus Lutjanus erythropterus DNA barcoding Bay of Bengal

Use of Scrapped Rubber Tires for Sustainable Construction of Manhole Covers

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Journal of Renewable Materials 2021年第5期9卷 1013-1029页

作者： Sadaqat Ullah Khan Afzal Ahmed Sajjad Ali Ayesha Ayub Ahmed Shuja Muhammad ahsan Shahid Department of Urban and Infrastructure Engineering NED University of Engineering and TechnologyKarachi75270Pakistan Department of Civil Engineering NED University of Engineering and TechnologyKarachi75270Pakistan

Scrapped tires from vehicles are produced in large quantities. Despite numerous existing uses of scrapped tires, alarge quantity ends up at the landfill sites, which contributes to environmental degradation. The development ofmore applications of scrapped tire usage can reduce the disposal of tires at landfill sites. This research proposes anovel use of scrapped tires by using the strips taken from scrapped tires in replacement of steel bars as reinforcement. Manhole covers were produced using scrapped tires by completely replacing the steel with scrapped *** different samples of manhole covers were prepared and tested. The highest bearing capacity of 25.5 kN wasrecorded with a sample of 100 mm thickness made with cementitious composite, which is 2.25 times higher thanthe bearing capacity of a conventional reinforced-concrete manhole cover. The use of manhole covers made withscrapped tires can effectively address the theft issue of manhole covers. The lifecycle cost analysis shows that themanhole cover made with scrapped tires is 3.4 times more cost-effective in comparison with the conventionalmanhole cover. This research shows a new avenue of the potential use of scrapped tires as reinforcement in structures, which can improve sustainable construction practices.

关键词： Scrapped tires sustainability manhole cover waste management recycling

SOLVING RESOURCE-CONSTRAINED PROJECT SCHEDULING PROBLEMS WITH BI-CRITERIA HEURISTIC SEARCH TECHNIQUES

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Systems Science and Systems Engineering 2003年第2期12卷 190-203页

作者： M Kamrul ahsan De-bi TSAO Department of Industrial Engineering and Management Tokyo Institute of Technology 2-12-1 O-okayamaMeguro-kuTokyo 152-8552JapanDepartment of Industrial Engineering and Management Tokyo Institute of Technology2-12-1 O-okayamaMeguro-kuTokyo 152-8552Japan

In this paper we formulate a bi-criteria search strategy of a heuristic learning algorithm for solving multiple resource-constrained project scheduling problems. The heuristic solves problems in two phases. In the pre-processing phase, the algorithm estimates distance between a state and the goal state and measures complexity of problem instances. In the search phase, the algorithm uses estimates of the pre-processing phase to further estimate distances to the goal state. The search continues in a stepwise generation of a series of intermediate states through search path evaluation process with backtracking. Developments of intermediate states are exclusively based on a bi-criteria new state selection technique where we consider resource utilization and duration estimate to the goal state. We also propose a variable weighting technique based on initial problem complexity measures. Introducing this technique allows the algorithm to efficiently solve complex project scheduling problems. A numerical example illustrates the algorithm and performance is evaluated by extensive experimentation with various problem parameters. Computational results indicate significance of the algorithm in terms of solution quality and computational performance.

关键词： Resource-constrained project scheduling search algorithm heuristics state-space representation

HRNetO:Human Action Recognition Using Unified Deep Features Optimization Framework

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Computers, Materials & Continua 2023年第4期75卷 1089-1105页

作者： Tehseen ahsan Sohail Khalid Shaheryar Najam Muhammad Attique Khan Ye Jin Kim Byoungchol Chang Department of Electrical Engineering Riphah International UniversityPeshawar Rdnear Hajj ComplexI-14IslamabadIslamabad Capital Territory46000Pakistan Departmnt of Computer Science HITEC UniversityTaxila47080Pakistan Department of Computer Science Hanyang UniversitySeoul04763Korea Center for Computational Social Science Hanyang UniversitySeoul04763Korea

Human action recognition(HAR)attempts to understand a subject’sbehavior and assign a label to each action *** is more appealingbecause it has a wide range of applications in computer vision,such asvideo surveillance and smart *** attempts have been made in theliterature to develop an effective and robust framework for ***,theprocess remains difficult and may result in reduced accuracy due to severalchallenges,such as similarity among actions,extraction of essential features,and reduction of irrelevant *** this work,we proposed an end-toendframework using deep learning and an improved tree seed optimizationalgorithm for accurate *** proposed design consists of a *** the first step,frame preprocessing is *** the second step,two pre-trained deep learning models are fine-tuned and trained throughdeep transfer learning using preprocessed video *** the next step,deeplearning features of both fine-tuned models are fused using a new ParallelStandard Deviation Padding Max Value *** fused features arefurther optimized using an improved tree seed algorithm,and select the bestfeatures are finally classified by using the machine learning *** was carried out on five publicly available datasets,including UTInteraction,Weizmann,KTH,Hollywood,and IXAMS,and achieved higheraccuracy than previous techniques.

关键词： Action recognition features fusion deep learning features selection