American journal of engineering, science and technology最新文献

{"title":"Filter-based Denoising Methods for AWGN corrupted images","authors":"","doi":"10.15864/ajse.2105","DOIUrl":"https://doi.org/10.15864/ajse.2105","url":null,"abstract":"","PeriodicalId":93409,"journal":{"name":"American journal of engineering, science and technology","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81115415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Complexation of Disperse Dyes Derived from Thiophene with Cu, Co, Zn Metal and Their Application Properties on Polyester and Nylon 6.6 Fabrics","authors":"Isaac Oluwatobi Abolude, Kasali Ademola Bello, Peter Obinna Nkeonye, A. Giwa","doi":"10.11648/j.ajset.20210603.11","DOIUrl":"https://doi.org/10.11648/j.ajset.20210603.11","url":null,"abstract":": Ethyl-4-((4-chlorophenyl)carbamoyl)-2-((5-cyano-2-hydroxy-1,4-dimethyl-6-oxo-1,6-dihydro-pyridin-3-yl) diazenyl)-5-methylthiophene-3-carboxylate and ethyl-4-((4-chlorophenyl) carbamoyl)-2-((5-cyano-1-ethyl-2-hydroxy-4-methyl-6-oxo-1,6-dihydropyridin-3-yl)diazenyl)-5-methylthiophene-3-carboxylate disperse dyes were synthesised in this study by the coupling reaction of synthesised ethyl 2-amino-4-((4-chlorophenyl)carbamoyl)-5-methylthiophene-3-carboxylate with 6-hydroxy-1,4-dimethyl-2-oxo-1,2-dihydropyridine-3-carbonitrile and 1-ethyl-6-hydroxy-4-methyl-2-oxo-1,2-dihydropyridine-3-carbonitrile. Metal complexation of the synthesised disperse dyes with copper, cobalt and zinc metals were carried out. The structure of the synthesised intermediate, coupling components, dyes and their complexes were elucidated by analytical techniques such as proton nuclear magnetic resonance ( 1 H NMR), carbon 13 nuclear magnetic resonance ( 13 C NMR), mass spectrometry (MS), fourier transform infra-red (FTIR), ultraviolet-visible spectroscopy as well as the determination of their melting points. The molar extinction coefficient of the dyes and their complexes ranges from 24,800 – 83,200 Lmol -1 cm -1 . The FTIR spectra of the synthesised dyes and their complexes showed the presence of cyano group in the range 2225 – 2229 cm -1 , carbonyl group in the range 1640 – 1692 cm -1 , hydroxyl group in the range 3310 – 3340 cm -1 , azo group in the range 1398 – 1491 cm -1 , stretching vibration of (N-H) in the range 3474 – 3478 cm -1 and stretching vibration of aromatic (C-H) in the range 2882 – 2989 cm -1 . The dyeing performance of the dyes and their metal complex analogous were assessed on polyester and nylon 6.6 fabrics. The dyes and their complexes were found have good levelness, excellent fastness to perspiration and sublimation, good to excellent wash fastness and light fastness on both polyester and nylon 6.6 fabrics with different shades of violet and brown.","PeriodicalId":93409,"journal":{"name":"American journal of engineering, science and technology","volume":"42 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79403152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Production of Hollow Block Using Waste Plastic and Sand","authors":"Bien Maunahan, Kebene Adeba","doi":"10.11648/j.ajset.20210604.15","DOIUrl":"https://doi.org/10.11648/j.ajset.20210604.15","url":null,"abstract":"","PeriodicalId":93409,"journal":{"name":"American journal of engineering, science and technology","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73232054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An Approach to E-Commerce with Voice Recognition","authors":"","doi":"10.15864/ajse.2304","DOIUrl":"https://doi.org/10.15864/ajse.2304","url":null,"abstract":"","PeriodicalId":93409,"journal":{"name":"American journal of engineering, science and technology","volume":"37 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90547554","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Distributed Constraint Optimization Problem Solving in Unstable Environments","authors":"","doi":"10.15864/ajse.2103","DOIUrl":"https://doi.org/10.15864/ajse.2103","url":null,"abstract":"","PeriodicalId":93409,"journal":{"name":"American journal of engineering, science and technology","volume":"51 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83778611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cost Optimization in Building Construction Projects with Special Reference to Kathmandu Valley of Nepal","authors":"Surendra Kumar Karn, K. Dahal","doi":"10.11648/J.AJSET.20210601.12","DOIUrl":"https://doi.org/10.11648/J.AJSET.20210601.12","url":null,"abstract":": Cost optimization is a process that should be carried out throughout the construction period to ensure that the cost of the project is within an allotted budget. Time and cost are the two most significant factors in any construction project. Cost increases with the time of construction. The objective of this study was to find out the factors that contribute to the optimization of construction costs in building construction projects in Nepal. The study was conducted during the period from April 2019 to September 2020. Field observation, in-depth interviews, focus group discussions and questionnaire surveys were the major tools for the investigation of this study. The findings were analyzed in nine categories: project related factors, design related factors, owner related factors, consultant related factors, contractor related factors, material related factors, labor related factors, equipment related factors, and external factors. The study found some key factors related to time and cost overrun, optimizing cost of construction and the strategies to optimize project costs. The most important strategy to optimize the construction cost are effective cost planning and control, development of proper monitoring and tracking system, sound working environment, recording daily work progress, using time cost trade off, follow plan-do-check-act quality policy, hire skilled labor and effective supervision. The study suggests that constructability and value engineering principles should be adopted in construction projects.","PeriodicalId":93409,"journal":{"name":"American journal of engineering, science and technology","volume":"75 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85370793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Islamic Values in Landscape & Architecture - Case Studies, Contemporary Relevance & Strategies","authors":"F. Fatima","doi":"10.11648/j.ajset.20210604.14","DOIUrl":"https://doi.org/10.11648/j.ajset.20210604.14","url":null,"abstract":"","PeriodicalId":93409,"journal":{"name":"American journal of engineering, science and technology","volume":"110 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79555976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Crypto-jacking Threat Detection Based on Blockchain Framework and Deception Techniques","authors":"","doi":"10.15864/ajse.2101","DOIUrl":"https://doi.org/10.15864/ajse.2101","url":null,"abstract":"","PeriodicalId":93409,"journal":{"name":"American journal of engineering, science and technology","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78010904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Direct Laser 3D Printing of Refractory Materials.","authors":"Shuang Bai,&nbsp;Hyeong Jae Lee,&nbsp;Jian Liu","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Direct laser 3D printing of refractory materials such as silicon carbide (SiC), tungsten (W), and tantalum hafnium carbide (TaHfC) have been systematically investigated. High relative density has been achieved for SiC, SiC/Al, W, and W/TaHfC. High density SiC structures and W thin wall were also fabricated. By mixing the metal powders (e.g. Al or W) with ceramic powder such as SiC or TaHfC, a metal/ceramic matrix is formed during the direct laser melting process to tailor the mechanical properties.</p>","PeriodicalId":93409,"journal":{"name":"American journal of engineering, science and technology","volume":"11 ","pages":"1-15"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8789000/pdf/nihms-1771337.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39952630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Shapley value in convolutional neural networks (CNNs): A Comparative Study","authors":"","doi":"10.15864/ajse.2302","DOIUrl":"https://doi.org/10.15864/ajse.2302","url":null,"abstract":"","PeriodicalId":93409,"journal":{"name":"American journal of engineering, science and technology","volume":"45 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85508422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}