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  Subjects -> SCIENCES: COMPREHENSIVE WORKS (Total: 428 journals)
Showing 1 - 200 of 265 Journals sorted alphabetically
AAS Open Research     Open Access   (Followers: 2)
ABC Journal of Advanced Research     Open Access  
Academic Voices : A Multidisciplinary Journal     Open Access   (Followers: 2)
Accountability in Research: Policies and Quality Assurance     Hybrid Journal   (Followers: 18)
Acta Materialia Transilvanica     Open Access  
Acta Nova     Open Access   (Followers: 1)
Acta Scientifica Malaysia     Open Access  
Acta Scientifica Naturalis     Open Access   (Followers: 3)
Adıyaman University Journal of Science     Open Access  
Advanced Science     Open Access   (Followers: 13)
Advanced Science, Engineering and Medicine     Partially Free   (Followers: 10)
Advanced Theory and Simulations     Hybrid Journal   (Followers: 5)
Advances in Research     Open Access   (Followers: 1)
Advances in Science and Technology     Full-text available via subscription   (Followers: 17)
African Journal of Science, Technology, Innovation and Development     Hybrid Journal   (Followers: 8)
Afrique Science : Revue Internationale des Sciences et Technologie     Open Access   (Followers: 2)
AFRREV STECH : An International Journal of Science and Technology     Open Access   (Followers: 4)
Akademik Platform Mühendislik ve Fen Bilimleri Dergisi     Open Access   (Followers: 2)
American Academic & Scholarly Research Journal     Open Access   (Followers: 6)
American Journal of Applied Sciences     Open Access   (Followers: 27)
American Journal of Humanities and Social Sciences     Open Access   (Followers: 15)
Anadol University Journal of Science and Technology B : Theoritical Sciences     Open Access  
Anadolu University Journal of Science and Technology A : Applied Sciences and Engineering     Open Access  
ANALES de la Universidad Central del Ecuador     Open Access   (Followers: 4)
Anales del Instituto de la Patagonia     Open Access  
Annali dell'Istituto e Museo di storia della scienza di Firenze     Hybrid Journal  
Applied Mathematics and Nonlinear Sciences     Open Access  
Apuntes de Ciencia & Sociedad     Open Access  
Arab Journal of Basic and Applied Sciences     Open Access  
Arabian Journal for Science and Engineering     Hybrid Journal   (Followers: 5)
Archives Internationales d'Histoire des Sciences     Partially Free   (Followers: 6)
Archives of Current Research International     Open Access   (Followers: 1)
ARO. The Scientific Journal of Koya University     Open Access  
ARPHA Conference Abstracts     Open Access   (Followers: 7)
ARPHA Proceedings     Open Access   (Followers: 4)
ArtefaCToS : Revista de estudios sobre la ciencia y la tecnología     Open Access   (Followers: 1)
Asia-Pacific Journal of Science and Technology     Open Access  
Asian Journal of Advanced Research and Reports     Open Access   (Followers: 2)
Asian Journal of Applied Science and Engineering     Open Access   (Followers: 2)
Asian Journal of Scientific Research     Open Access   (Followers: 3)
Asian Journal of Technology Innovation     Hybrid Journal   (Followers: 7)
Australian Field Ornithology     Full-text available via subscription   (Followers: 4)
Australian Journal of Social Issues     Hybrid Journal   (Followers: 7)
Avances en Ciencias e Ingeniería     Open Access  
Avrasya Terim Dergisi     Open Access  
AZimuth     Full-text available via subscription   (Followers: 2)
Bangladesh Journal of Scientific Research     Open Access   (Followers: 1)
Beni-Suef University Journal of Basic and Applied Sciences     Open Access   (Followers: 3)
Berichte Zur Wissenschaftsgeschichte     Hybrid Journal   (Followers: 10)
Berkeley Scientific Journal     Full-text available via subscription  
BIBECHANA     Open Access   (Followers: 2)
BibNum     Open Access  
Bilge International Journal of Science and Technology Research     Open Access   (Followers: 1)
Bioethics Research Notes     Full-text available via subscription   (Followers: 16)
Bistua : Revista de la Facultad de Ciencias Básicas     Open Access  
Bitlis Eren Üniversitesi Fen Bilimleri Dergisi     Open Access  
Bitlis Eren University Journal of Science and Technology     Open Access   (Followers: 1)
Black Sea Journal of Engineering and Science     Open Access  
Borneo Journal of Resource Science and Technology     Open Access  
Brazilian Journal of Science and Technology     Open Access   (Followers: 2)
Bulletin de la Société Royale des Sciences de Liège     Open Access  
Bulletin of the National Research Centre     Open Access  
Butlletí de la Institució Catalana d'Història Natural     Open Access  
Celal Bayar Üniversitesi Fen Bilimleri Dergisi     Open Access   (Followers: 1)
Central European Journal of Clinical Research     Open Access  
Chain Reaction     Full-text available via subscription  
Ciencia & Natura     Open Access   (Followers: 1)
Ciencia Amazónica (Iquitos)     Open Access   (Followers: 1)
Ciencia en Desarrollo     Open Access   (Followers: 2)
Ciencia en su PC     Open Access   (Followers: 1)
Ciencia Ergo Sum     Open Access  
Ciência ET Praxis     Open Access  
Ciencia y Tecnología     Open Access  
Ciencia, Docencia y Tecnología     Open Access  
Ciencias Holguin     Open Access   (Followers: 3)
CienciaUAT     Open Access   (Followers: 1)
Citizen Science : Theory and Practice     Open Access   (Followers: 1)
Communications Faculty of Sciences University of Ankara Series A2-A3 Physical Sciences and Engineering     Open Access  
Communications in Applied Sciences     Open Access  
Comprehensive Therapy     Hybrid Journal   (Followers: 3)
Comunicata Scientiae     Open Access   (Followers: 1)
ConCiencia     Open Access  
Conference Papers in Science     Open Access   (Followers: 2)
Configurations     Full-text available via subscription   (Followers: 10)
COSMOS     Hybrid Journal  
Crea Ciencia Revista Científica     Open Access   (Followers: 3)
Cuadernos de Investigación UNED     Open Access  
Cumhuriyet Science Journal     Open Access  
Current Issues in Criminal Justice     Hybrid Journal   (Followers: 15)
Current Research in Geoscience     Open Access   (Followers: 8)
Dalat University Journal of Science     Open Access  
Data     Open Access   (Followers: 4)
Data Curation Profiles Directory     Open Access   (Followers: 4)
Dhaka University Journal of Science     Open Access  
Dharmakarya     Open Access  
Diálogos Interdisciplinares     Open Access  
Digithum     Open Access   (Followers: 2)
Eastern Anatolian Journal of Science     Open Access  
Einstein (São Paulo)     Open Access  
Ekaia : EHUko Zientzia eta Teknologia aldizkaria     Open Access  
Elkawnie : Journal of Islamic Science and Technology     Open Access  
Emergent Scientist     Open Access  
Enhancing Learning in the Social Sciences     Open Access   (Followers: 9)
Enseñanza de las Ciencias : Revista de Investigación y Experiencias Didácticas     Open Access  
Entramado     Open Access  
Entre Ciencia e Ingeniería     Open Access   (Followers: 1)
Epiphany     Open Access   (Followers: 4)
Episteme Transversalis     Open Access  
Ergo     Open Access  
Estação Científica (UNIFAP)     Open Access   (Followers: 1)
Ethiopian Journal of Education and Sciences     Open Access   (Followers: 6)
Ethiopian Journal of Science and Technology     Open Access  
Ethiopian Journal of Sciences and Sustainable Development     Open Access   (Followers: 7)
European Online Journal of Natural and Social Sciences     Open Access   (Followers: 13)
European Scientific Journal     Open Access   (Followers: 9)
Evidência - Ciência e Biotecnologia - Interdisciplinar     Open Access  
Exchanges : the Warwick Research Journal     Open Access   (Followers: 2)
Extensionismo, Innovación y Transferencia Tecnológica     Open Access   (Followers: 5)
Facets     Open Access  
Fides et Ratio : Revista de Difusión Cultural y Científica     Open Access   (Followers: 1)
Fırat Üniversitesi Fen Bilimleri Dergisi     Open Access  
Fırat University Turkish Journal of Science & Technology     Open Access  
Fontanus     Open Access  
Forensic Science Policy & Management: An International Journal     Hybrid Journal   (Followers: 378)
Frontiers for Young Minds     Open Access  
Frontiers in Climate     Open Access   (Followers: 3)
Frontiers in Science     Open Access   (Followers: 1)
Futures & Foresight Science     Hybrid Journal   (Followers: 4)
Gaudium Sciendi     Open Access   (Followers: 1)
Gazi University Journal of Science     Open Access  
Gaziosmanpaşa Bilimsel Araştırma Dergisi     Open Access  
Ghana Studies     Full-text available via subscription   (Followers: 15)
Global Journal of Pure and Applied Sciences     Full-text available via subscription  
Global Journal of Science Frontier Research     Open Access   (Followers: 2)
Globe, The     Full-text available via subscription   (Followers: 4)
HardwareX     Open Access  
Heidelberger Jahrbücher Online     Open Access  
Heliyon     Open Access  
Himalayan Journal of Science and Technology     Open Access   (Followers: 1)
Hoosier Science Teacher     Open Access  
Iğdır Üniversitesi Fen Bilimleri Enstitüsü Dergisi / Journal of the Institute of Science and Technology     Open Access  
Impact     Open Access   (Followers: 2)
Indonesian Journal of Fundamental Sciences     Open Access  
Indonesian Journal of Science and Mathematics Education     Open Access   (Followers: 3)
Indonesian Journal of Science and Technology     Open Access  
Ingenieria y Ciencia     Open Access   (Followers: 1)
Innovare : Revista de ciencia y tecnología     Open Access  
Instruments     Open Access  
Integrated Research Advances     Open Access  
Interciencia     Open Access   (Followers: 1)
Interface Focus     Full-text available via subscription  
International Annals of Science     Open Access  
International Archives of Science and Technology     Open Access  
International Journal of Academic Research in Business, Arts & Science     Open Access   (Followers: 2)
International Journal of Advanced Multidisciplinary Research and Review     Open Access  
International Journal of Advancement in Education and Social Sciences     Open Access   (Followers: 1)
International Journal of Advances in Engineering, Science and Technology     Open Access   (Followers: 3)
International Journal of Applied Science     Open Access  
International Journal of Basic and Applied Sciences     Open Access   (Followers: 4)
International Journal of Computational and Experimental Science and Engineering (IJCESEN)     Open Access  
International Journal of Engineering, Science and Technology     Open Access  
International Journal of Engineering, Technology and Natural Sciences     Open Access  
International Journal of Innovation and Applied Studies     Open Access   (Followers: 12)
International Journal of Innovative Research and Scientific Studies     Open Access   (Followers: 5)
International Journal of Innovative Research in Social and Natural Sciences     Open Access   (Followers: 1)
International Journal of Network Science     Hybrid Journal   (Followers: 3)
International Journal of Recent Contributions from Engineering, Science & IT     Open Access   (Followers: 1)
International Journal of Research in Science     Open Access   (Followers: 2)
International Journal of Science & Emerging Technologies     Open Access   (Followers: 1)
International Journal of Sciences : Basic and Applied Research     Open Access  
International Journal of Social Sciences and Management     Open Access   (Followers: 2)
International Journal of Technology Policy and Law     Hybrid Journal   (Followers: 7)
International Letters of Social and Humanistic Sciences     Open Access   (Followers: 1)
International Review of Applied Sciences     Open Access  
International Scientific and Vocational Studies Journal     Open Access   (Followers: 1)
InterSciencePlace     Open Access   (Followers: 1)
Investiga : TEC     Open Access  
Investigación Joven     Open Access  
Investigación Valdizana     Open Access  
Investigacion y Ciencia     Open Access   (Followers: 1)
Iranian Journal of Science and Technology, Transactions A : Science     Hybrid Journal  
iScience     Open Access  
Issues in Science & Technology     Free   (Followers: 7)
İstanbul Ticaret Üniversitesi Fen Bilimleri Dergisi / İstanbul Commerce University Journal of Science     Open Access  
Istituto Lombardo - Accademia di Scienze e Lettere - Rendiconti di Scienze     Open Access  
Ithaca : Viaggio nella Scienza     Open Access  
J : Multidisciplinary Scientific Journal     Open Access  
Journal de la Recherche Scientifique de l'Universite de Lome     Full-text available via subscription   (Followers: 2)
Journal for New Generation Sciences     Open Access   (Followers: 4)
Journal of Chromatography & Separation Techniques     Open Access   (Followers: 12)
Journal of Advanced Research     Open Access   (Followers: 3)
Journal of Al-Qadisiyah for Pure Science     Open Access   (Followers: 1)
Journal of Analytical Science & Technology     Open Access   (Followers: 6)
Journal of Applied Science and Technology     Full-text available via subscription   (Followers: 1)
Journal of Applied Sciences and Environmental Management     Open Access   (Followers: 3)
Journal of Big History     Open Access   (Followers: 3)
Journal of Composites Science     Open Access   (Followers: 3)
Journal of Critical Thought and Praxis     Open Access   (Followers: 2)
Journal of Deliberative Mechanisms in Science     Open Access  
Journal of Diversity Management     Open Access   (Followers: 4)

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International Journal of Engineering, Science and Technology
Number of Followers: 0  

  This is an Open Access Journal Open Access journal
ISSN (Print) 2141-2839
Published by African Journals Online Homepage  [264 journals]
  • Design of an adaptive overcurrent protection scheme for microgrids

    • Authors: Mohamed Awaad, S.F. Mekhamer, Almoataz Y. Abdelaziz
      Abstract: Microgrid is a new phenomenon regarded to Distributed Generation (DG) penetration in the existing distribution systems. In this paper adaptive over current (OC) protection technique for a distribution system with DG penetration is proposed. This scheme takes into account general protection requirements, impacts of DG on protection system and protection coordination. A part of IEEE 13 nodes radial distribution test feeder is taken as a study case to test the effectiveness of the proposed scheme using ETAP software.
      Keywords: Distributed Generator, Microgrids, Adaptive overcurrent protection, Protection Coordination
      PubDate: 2018-02-20
      Issue No: Vol. 10, No. 1 (2018)
       
  • Optimization of machining parameters of hard porcelain on a CNC machine by
           Taguchi-and RSM method

    • Authors: Saurabh Agrawal, Manoj kumar Gaur, Dinesh kumar Kasdekar, Sharad Agrawal
      Abstract: In order to build up a relationship between quality and productivity, the present work focuses an optimized approach to  establishing the multi-objective machining  parameters and mathematical models for Pressure and Voltage on CNC turning  machine (SINUMERIK802D). The Pressure and Voltage seem to be known as  quality issues; they are as well presumed to have direct association with productivity. In this study, minimization of response parameters has been identified by using design of  experimental methods, Taguchi Analysis and Response surface methodology (RSM). The conduct of experiments was made by employing the Taguchi’s L27 Orthogonal array to design the experiment by considering spindle speed (SS), feed rate (FR), angle of cut (AOC) and depth of cut (DOC) as Machining parameters. The model for the Pressure and Voltage, as the function of  response parameters, is obtained using the RSM. Finally, the result of developed mathematical model is examined by ANOVA. Experimental results indicate that the feed rate, angle of cut and depth of cut are the leading parameters that affect the Pressure (P). similarly for Voltage (V), all the cutting parameters (Spindle speed, feed rate, angle of cut and depth of cut) are found to be significant, which can be diminished when the significant factors were kept at the lower level, while other factors were kept at the highest level. On the Basis of analysis, it is found that both the optimization techniques predict the results in fair agreement.
      Keywords:SINUMERIK802D, Machining parameters, RSM, Taguchi Method, ANOVA.
      PubDate: 2018-02-20
      Issue No: Vol. 10, No. 1 (2018)
       
  • SwyftTapp: An NFC based attendance system using fingerprint authentication

    • Authors: B. Kommey, O. Anyane-Lah, W.E. Amuzu
      Abstract: Attendance has evolved to become a key requirement in educational institutions worldwide. With empirical evidence showing correlation between students’academic performance and attendance, parents, guardians, lecturers and school  administrations make effort to monitor attendance of students to classes and academic events. The conventional method for recording attendance in the Kwame Nkrumah University of Science and Technology (KNUST), is the manual system, where sheets are passed round for students to write their names, student ID numbers and then append their signatures. The current manual system was  observed to be both inefficient and time-consuming. In this paper we discuss the use of NFC technology coupled with fingerprint verification technology, designed to work with an API and a web-based application to implement a more effective approach for recording and managing attendance in the university. The Department of Computer Engineering, KNUST was used as the scope of the project.
      Keywords:Attendance, RFID, NFC, Fingerprint Technology, API, Web-based Management System
      PubDate: 2018-02-20
      Issue No: Vol. 10, No. 1 (2018)
       
  • Granulated blast furnace slag – A boon for foundry industry

    • Authors: I. Narasimha Murthy, N. Arun Babu, J. Babu Rao
      Abstract: In the present investigation efforts have been put together to employ Granulated Blast furnace (GBF) slag as mould material for replacement of existing silica sand either full or partial in foundry industry. Nishiyama procedure was assumed for appraising the same. The process factors reflected on for this were the % of sodium silicate, % of Fe-Si powder and mould setting time. A  sequence of tests on sand was conducted on sand, slag as per American foundry society standards. Two categories of moulds were built by means of sand and slag independently with optimum process parameters. A356 alloy and grey cast iron castings were executed on these  recently built up slag moulds. The outcomes show that the mould’s compression, permeability as well as the shear strength of the GBF slag is an appropriate candidate for either incomplete or complete substitute of moulding sand. At some point in casting, the absence of fusing, dripping or mould wall collapse walls was noticed; this is exact for the ferrous as well as non-ferrous castings. Castings exhibiting high-quality surface finish, absence of surface defects as well as porosity were created by slag moulds.
      Keywords: Silica sand; Blast Furnace Slag; Mould properties; Ferrous and nonferrous castings.
      PubDate: 2018-02-20
      Issue No: Vol. 10, No. 1 (2018)
       
  • Heat transfer in a vertical rectangular duct filled with a porous matrix
           and saturated with a nanofluid for temperature dependent viscosity

    • Authors: J.C. Umavathi
      Abstract: This paper presents the results of a comprehensive numerical study to analyze free convective heat transfer in a vertical  rectangular duct filled with porous matrix and saturated with nanofluid for temperature dependent viscosity. Using the Darcy- Forchhiemer model, the momentum in the porous medium was simulated. While  insulating two opposing wall ducts, the  temperatures remained varied for the other two walls. Solutions to the transport equations for a Newtonian fluid were provided
      numerically through the finite difference approach to second order accuracy. The impact of the overriding parameters, for  instance, the parameters of variable viscosity as well as inertial, the Grashof number, Darcy number, Brinkman number, solid volume index as well as the aspect ratio having a water-Copper nanofluid on the flow characteristics of natural convection is investigated. The flow nature using different nanoparticles is also studied. The values of volumetric flow rate, skin friction and Nusselt number are tabulated for pertinent parameters. It is found that for negative values of viscosity variation parameter the flow is enhanced in the lower part of the duct and positive values will enhance the flow in the upper part of the duct. Silver nanoparticle attains the maximum heat transfer rate when compared to other nanoparticles.
      Keywords: Natural convection; Darcy-Forchhiemer model; Nanofluids; Variable viscosity; Viscous dissipation; Rectangular duct; Finite difference method.
      PubDate: 2018-02-20
      Issue No: Vol. 10, No. 1 (2018)
       
  • A desirability functions-based approach for simultaneous optimization of
           quantitative and ordinal response variables in industrial processes

    • Authors: Surajit Pal, Susanta Kumar Gauri
      Abstract: The most important step for producing high quality products is the optimum  utilization of the manufacturing processes and its resources, which can be  accomplished by using optimal process settings. Extensive research works are reported in literature for optimization of process settings with respect to single as well as multiple quantitative response variables. However, in real world, often some aspects of product quality (e.g. dimensions, yield etc.) are measured quantitatively and some other aspects of product quality (e.g. color, finish etc.) are assessed qualitatively like 'poor', 'average', 'good' etc., which can be treated as ordered  categorical or ordinal variables. Only a few researchers have attempted to tackle the problem of simultaneous optimization of quantitative and ordinal response variables. But none of these approaches results in an efficient optimal solution with respect to the desirability values of all the individual response variables. It  motivated us to develop a more useful approach for   simultaneously optimizing  industrial processes with respect to quantitative as well as ordinal response variables. In the proposed method, the concept of desirability functions for  continuous quantitative variables is extended for ordinal response variables, and then process settings is optimized considering geometric mean of the individual desirability functions of continuous as well as ordinal response variables. A set of experimental data, which have been analyzed by the past researchers, are analyzed using the proposed method and the related results are compared. The comparison of results reveals that the proposed method leads to better optimal solution than the other methods.
      Keywords: Quantitative responses, Ordinal responses, Multiple regression, Ordinal logistic regression, Desirability function, Optimization
      PubDate: 2018-02-20
      Issue No: Vol. 10, No. 1 (2018)
       
 
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