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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: 2)
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, Technology and Natural Sciences
Number of Followers: 0  

  This is an Open Access Journal Open Access journal
ISSN (Print) 2147-9801
Published by DergiPark Homepage  [220 journals]
  • DESIGN AND IMPLEMENTATION OF A SIX ISOLATED OUTPUT FLYBACK CONVERTER

    • Authors: IRES ISKENDER; SAEID AGHAEI HASHJIN, ALI MAMIZADEH
      Abstract: Any electronic devices especially, devices with embedded design have different sub-units and these units need for different voltage levels as the power supply. The mentioned electronic devices use simultaneously various voltage levels in sub-units such as logical operations, detection, communication and mechanics. For example, a variety of voltage levels such as 3.3 V, -5 V, 5 V, +15 V, -15 V and 25 V are used simultaneously in the embedded system. In this study, the design of a flyback power supply with six isolated output levels is analyzed. The transient and steady state simulations of converter are performed in Matlab / Simulink. The experiments carried out in the laboratory verify the simulation results. Index Terms—Flyback Converter, Multiple Output, SMPS Power Supply, Flyback Simulation, Flyback Transformer Design
      PubDate: Fri, 01 Jan 2016 00:00:00 +030
       
  • A LONGITUDINAL SLOTTED ARRAY ANTENNA DESIGN ON SUBSTRATE INTEGRATED
           WAVEGUIDE FOR K-BAND RADAR APPLICATIONS

    • Authors: YUNUS EMRE YAMAC; AHMET KIZILAY
      Abstract: In this paper, a Substrate Integrated Waveguide (SIW) longitudinal slotted array antenna is proposed for using at K-band radar applications. The offsets, widths, and length of the slots and other parameters of the antenna are optimized by using numerical techniques to achieve desired beam shape and resonance frequency at millimeterwave band. Waveguide longitudinal slotted array antennas can have very narrow and shaped beam and a SIW antenna can easier be integrated to other electronics than a waveguide structure. In addition, a SIW antenna is fabricated easier than a waveguide, especially for high frequencies. Eleven and twenty-one slots are used to obtain desired narrow beam on vertical axis. The antennas are designed and simulated on a dielectric substrate with a dielectric constant of 3.2 and with a thickness of 0.782 mm. According to simulation results, the proposed antennas with eleven and twenty-one slots presents 12.3 and 15.3 dB maximum gain, -13.0 and -12.5 dB side lobe level (SLL), 16.6 and 8.2 deg. 3 dB angular width at 25.5 and 25.3 GHz frequency, respectively
      PubDate: Fri, 01 Jan 2016 00:00:00 +030
       
  • EFFECTIVENESS OF THE SWITCHED LINE STRATEGY ON THE CONSTANT TIME GAP
           POLICY (CTG) IN ADAPTIVE CRUISE CONTROL SYSTEM (ACC)

    • Authors: HASAN SAHIN; ORHAN ATABAY
      Abstract: This paper analyses the effectiveness of the Switched Line Strategy (SLS) in improving the drive comfort with Adaptive Cruise Control (ACC) System. There were special cases in which Constant Time Gap policy (CTG) and Cruise Control System (CC) could not provide continuous acceleration/deceleration values in an ACC system, for example, the case when the desired distance between a host vehicle and a target vehicle is lower than the actual distance between the two vehicles and the speed of the host vehicle is higher than that of the target vehicle. When the host vehicle attains the desired distance to the target vehicle, speed of the host vehicle is still much higher than the speed of the target vehicle. The system still automatically accelerates the host vehicle towards the target vehicle although the target vehicle is in the range of the long range radar. Therefore, the originality of this paper arises from a need for the SLS in such special cases. The designed SLS calculates the desired deceleration value to reach the desired state for this case. Results have been analysed and it was observed that the host vehicle came to the desired point smoothly without decreasing the relative distance between the vehicles to under 50 meters. Therefore, the proposed SLS of the CTG policy in the ACC system provides appropriate longitudinal maneuvers which might add to the driving comfort in some real life traffic situations
      PubDate: Fri, 01 Jan 2016 00:00:00 +030
       
  • TEMPERATURE MEASUREMENT OF CORONA DISCHARGE IN SF6-N2 GAS MIXTURE

    • Authors: AHCENE LEMZADMI; TAREK BORDJIBA, ABDELKARIM MOUSSAOUI, FAYCAL BELOUCIF
      Abstract: Rotational and vibrational temperatures of SF6-N2 gas mixture are spectroscopically measured over a pressure range of 2-14 bars. The spectra obtained of the light emission of the corona discharge were recorded with different values of pressure, voltage and current together with the variation of the position of the tip electrode. The emission of N2 is very dominant for different gas concentration and the second positive system 2S+ is the most important. The convolution method is used for the determination of the temperature. The Rotational temperature measurements of the plasma reveal gas temperatures in the range of 450-650 °K and vibrational temperatures in the range of 1800-2200 °K
      PubDate: Fri, 01 Jan 2016 00:00:00 +030
       
  • PRESSURE ENFORCEMENT EFFECTS ON THE CURRENT DENSITY OF PEM FUEL CELLS

    • Authors: AYSEL ERSOY YILMAZ; MEHMET MURAT ISPIRLI, NEVRA BAYHAN
      Abstract: During the last century, there has been an increase in the average temperature of the world as a result of the rising carbon dioxide concentration. Photovoltaic systems, wind turbines and fuel cells are systems that can produce energy with zero CO2 emission. One of these systems, the fuel cells come to the forefront with a high energy capacity, portability and ease of fuel storage. External factors such as pressure are important parameters for the performance of the fuel cells. In this study the effects of the external factors on the performance of the fuel cell was examined using the finite elements method by using the COMSOL Multiphysics software. The input pressures of the fuel cell between 1 atm and 2 atm were examined at intervals of 0.1 atm as an external factor. Performance assessment was made using the current density value obtained from the anode surface in the study carried out using the finite elements method
      PubDate: Fri, 01 Jan 2016 00:00:00 +030
       
  • FAST ANGULAR SPEED MEASURMENT METHOD FOR ONLINE TRANSIENT STABILITY
           ASSESSMENT IN POWER SYSTEMS

    • Authors: AHMED AL-TAEE; MAJID AL-TAEE, WALEED AL-NUAIMY
      Abstract: Fast measurement of angular speed of rotating machines is a pivotal requirement for many real-time and online power systems applications and, in particular, early fault detection and transient stability assessment and control. This paper presents a new high speed measurement method for computing the rate of change of kinetic energy (RACKE) in real-time. RACKE is an effective criterion for assessment of transient stability in power systems, which was thoroughly investigated using computer simulation. Design and implementation of the proposed speed measurement method is based on a 16-bit microprocessor system and associated hardware circuitry for interfacing an electromagnetic speed sensor, signal conditioning, and control ON/OFF application of a dynamic break to a power system simulator. The operating principle of the developed method is mathematically formulated and implemented using an efficient software algorithm. Implementation challenges relevant to the noisy response of the rotary transducers and fast-speed measurement are also addressed and presented. Performance of the proposed speed measurement method is assessed experimentally using a single machine infinite bus power system. The obtained results and practical observations demonstrated that the speed measurement algorithm is highly accurate (to within approximately 0.013%) with a highly efficient time complexity. This allows for further investigation of RACKE criterion using practical implementation rather than computer simulation
      PubDate: Fri, 01 Jan 2016 00:00:00 +030
       
  • REDUCTION OF FUEL CONSUMPTION BY USING AERODYNAMIC DOOR TOP PROFILE ON
           TRAILER AND SEMI-TRAILER

    • Authors: İlhan Topçu; Gülsüm Yeşim Çolakoğlu, Uğur Keleş
      Abstract: Fuel efficiency in vehicles is the important issue that dwells on for recent years not only for consumed fuel cost but also for the reduction of pollution caused by emission. There are several factor which affect the fuel consumption. One of them is aerodynamic resistance. Any decrease in the aerodynamic resistance has a great importance at fuel consumption. Especially fuel consumption in tractor trailer combination is much more than other automobiles. The main purpose of this report is to explain the reduction of aerodynamic force and as a result of this fuel consumption will be reduced by using new aerodynamic door top profile on tractor trailer combination. The new aerodynamic door top profile is an important component used to minimize losses caused aerodynamic resistance and to reach desired velocity with less engine power and less fuel. In this study, calculation is done based on the empirical formulas in order to find forces that affect the whole vehicle and aerodynamic force reduction with the usage of new aerodynamic door top profile. New aerodynamic door top profile is designed properly base upon these calculation. Necessary CFD Analysis (Computational Fluid Dynamics) is performed over this design to verify the calculation
      PubDate: Fri, 01 Jan 2016 00:00:00 +030
       
  • GLAUCOMA DIAGNOSIS USING FEATURE LEARNING BASED ON CONVOLUTIONAL NEURAL
           NETWORK

    • Authors: BAIDAA AL-; WALEED AL-, MAJID AL- YALIN BANDER, NUAIMY, TAEE, ZHENG
      Abstract: Glaucoma is one of the common causes of blindness worldwide. It leads to deterioration in vision and quality of life if it is not cured early. This paper addresses the feasibility of developing an automatic feature learning technique for detecting glaucoma in coloured retinal fundus images using a deep learning method. A fully automated system based on convolutional neural network (CNN) is developed to distinguish between normal and glaucomatous patterns for diagnostic decisions. Unlike traditional methods where the optic disc features are handcrafted, the features are extracted automatically from the raw images by CNN and fed to the SVM classifier to classify the images into normal or abnormal. We demonstrate an accuracy, specificity and sensitivity of 88.2%, 90.8%, and 85%, respectively which compared favourably to the-state-of-the-art but at considerably lower computational cost. The obtained preliminary results clearly demonstrate that the proposed deep learning method is promising in automatic diagnosis of glaucoma
      PubDate: Fri, 01 Jan 2016 00:00:00 +030
       
 
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