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  Subjects -> ENGINEERING (Total: 2417 journals)
    - CHEMICAL ENGINEERING (207 journals)
    - CIVIL ENGINEERING (202 journals)
    - ELECTRICAL ENGINEERING (111 journals)
    - ENGINEERING (1267 journals)
    - ENGINEERING MECHANICS AND MATERIALS (400 journals)
    - HYDRAULIC ENGINEERING (56 journals)
    - INDUSTRIAL ENGINEERING (76 journals)
    - MECHANICAL ENGINEERING (98 journals)

ENGINEERING (1267 journals)                  1 2 3 4 5 6 7 | Last

Showing 1 - 200 of 1205 Journals sorted alphabetically
3 Biotech     Open Access   (Followers: 8)
3D Research     Hybrid Journal   (Followers: 21)
AAPG Bulletin     Hybrid Journal   (Followers: 8)
AASRI Procedia     Open Access   (Followers: 14)
Abstract and Applied Analysis     Open Access   (Followers: 3)
Aceh International Journal of Science and Technology     Open Access   (Followers: 2)
ACS Nano     Full-text available via subscription   (Followers: 274)
Acta Geotechnica     Hybrid Journal   (Followers: 7)
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 7)
Acta Polytechnica : Journal of Advanced Engineering     Open Access   (Followers: 3)
Acta Scientiarum. Technology     Open Access   (Followers: 3)
Acta Universitatis Cibiniensis. Technical Series     Open Access  
Active and Passive Electronic Components     Open Access   (Followers: 7)
Adaptive Behavior     Hybrid Journal   (Followers: 11)
Adıyaman Üniversitesi Mühendislik Bilimleri Dergisi     Open Access  
Adsorption     Hybrid Journal   (Followers: 4)
Advanced Engineering Forum     Full-text available via subscription   (Followers: 7)
Advanced Journal of Graduate Research     Open Access  
Advanced Science     Open Access   (Followers: 5)
Advanced Science Focus     Free   (Followers: 5)
Advanced Science Letters     Full-text available via subscription   (Followers: 10)
Advanced Science, Engineering and Medicine     Partially Free   (Followers: 7)
Advanced Synthesis & Catalysis     Hybrid Journal   (Followers: 18)
Advances in Calculus of Variations     Hybrid Journal   (Followers: 2)
Advances in Catalysis     Full-text available via subscription   (Followers: 5)
Advances in Complex Systems     Hybrid Journal   (Followers: 7)
Advances in Engineering Software     Hybrid Journal   (Followers: 27)
Advances in Fuel Cells     Full-text available via subscription   (Followers: 17)
Advances in Fuzzy Systems     Open Access   (Followers: 5)
Advances in Geosciences (ADGEO)     Open Access   (Followers: 13)
Advances in Heat Transfer     Full-text available via subscription   (Followers: 21)
Advances in Human Factors/Ergonomics     Full-text available via subscription   (Followers: 22)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 9)
Advances in Natural Sciences: Nanoscience and Nanotechnology     Open Access   (Followers: 29)
Advances in Operations Research     Open Access   (Followers: 12)
Advances in OptoElectronics     Open Access   (Followers: 6)
Advances in Physics Theories and Applications     Open Access   (Followers: 13)
Advances in Polymer Science     Hybrid Journal   (Followers: 43)
Advances in Porous Media     Full-text available via subscription   (Followers: 5)
Advances in Remote Sensing     Open Access   (Followers: 44)
Advances in Science and Research (ASR)     Open Access   (Followers: 6)
Aerobiologia     Hybrid Journal   (Followers: 3)
African Journal of Science, Technology, Innovation and Development     Hybrid Journal   (Followers: 6)
AIChE Journal     Hybrid Journal   (Followers: 35)
Ain Shams Engineering Journal     Open Access   (Followers: 5)
Akademik Platform Mühendislik ve Fen Bilimleri Dergisi     Open Access   (Followers: 1)
Alexandria Engineering Journal     Open Access   (Followers: 1)
AMB Express     Open Access   (Followers: 1)
American Journal of Applied Sciences     Open Access   (Followers: 26)
American Journal of Engineering and Applied Sciences     Open Access   (Followers: 10)
American Journal of Engineering Education     Open Access   (Followers: 9)
American Journal of Environmental Engineering     Open Access   (Followers: 16)
American Journal of Industrial and Business Management     Open Access   (Followers: 24)
Analele Universitatii Ovidius Constanta - Seria Chimie     Open Access  
Annals of Combinatorics     Hybrid Journal   (Followers: 4)
Annals of Pure and Applied Logic     Open Access   (Followers: 2)
Annals of Regional Science     Hybrid Journal   (Followers: 7)
Annals of Science     Hybrid Journal   (Followers: 7)
Antarctic Science     Hybrid Journal   (Followers: 1)
Applicable Algebra in Engineering, Communication and Computing     Hybrid Journal   (Followers: 2)
Applicable Analysis: An International Journal     Hybrid Journal   (Followers: 1)
Applied Catalysis A: General     Hybrid Journal   (Followers: 6)
Applied Catalysis B: Environmental     Hybrid Journal   (Followers: 18)
Applied Clay Science     Hybrid Journal   (Followers: 6)
Applied Computational Intelligence and Soft Computing     Open Access   (Followers: 11)
Applied Magnetic Resonance     Hybrid Journal   (Followers: 4)
Applied Nanoscience     Open Access   (Followers: 8)
Applied Network Science     Open Access   (Followers: 3)
Applied Numerical Mathematics     Hybrid Journal   (Followers: 5)
Applied Physics Research     Open Access   (Followers: 5)
Applied Sciences     Open Access   (Followers: 3)
Applied Spatial Analysis and Policy     Hybrid Journal   (Followers: 4)
Arabian Journal for Science and Engineering     Hybrid Journal   (Followers: 5)
Archives of Computational Methods in Engineering     Hybrid Journal   (Followers: 5)
Archives of Foundry Engineering     Open Access  
Archives of Thermodynamics     Open Access   (Followers: 8)
Arkiv för Matematik     Hybrid Journal   (Followers: 1)
ASEE Prism     Full-text available via subscription   (Followers: 3)
Asia-Pacific Journal of Science and Technology     Open Access  
Asian Engineering Review     Open Access  
Asian Journal of Applied Science and Engineering     Open Access   (Followers: 1)
Asian Journal of Applied Sciences     Open Access   (Followers: 2)
Asian Journal of Biotechnology     Open Access   (Followers: 8)
Asian Journal of Control     Hybrid Journal  
Asian Journal of Current Engineering & Maths     Open Access  
Asian Journal of Technology Innovation     Hybrid Journal   (Followers: 8)
Assembly Automation     Hybrid Journal   (Followers: 2)
at - Automatisierungstechnik     Hybrid Journal   (Followers: 1)
ATZagenda     Hybrid Journal  
ATZextra worldwide     Hybrid Journal  
Australasian Physical & Engineering Sciences in Medicine     Hybrid Journal   (Followers: 1)
Australian Journal of Multi-Disciplinary Engineering     Full-text available via subscription   (Followers: 2)
Autonomous Mental Development, IEEE Transactions on     Hybrid Journal   (Followers: 9)
Avances en Ciencias e Ingeniería     Open Access  
Balkan Region Conference on Engineering and Business Education     Open Access   (Followers: 1)
Bangladesh Journal of Scientific and Industrial Research     Open Access  
Basin Research     Hybrid Journal   (Followers: 5)
Batteries     Open Access   (Followers: 6)
Bautechnik     Hybrid Journal   (Followers: 1)
Bell Labs Technical Journal     Hybrid Journal   (Followers: 28)
Beni-Suef University Journal of Basic and Applied Sciences     Open Access   (Followers: 4)
BER : Manufacturing Survey : Full Survey     Full-text available via subscription   (Followers: 1)
BER : Motor Trade Survey     Full-text available via subscription  
BER : Retail Sector Survey     Full-text available via subscription   (Followers: 1)
BER : Retail Survey : Full Survey     Full-text available via subscription   (Followers: 1)
BER : Survey of Business Conditions in Manufacturing : An Executive Summary     Full-text available via subscription   (Followers: 3)
BER : Survey of Business Conditions in Retail : An Executive Summary     Full-text available via subscription   (Followers: 3)
Beyond : Undergraduate Research Journal     Open Access  
Bhakti Persada : Jurnal Aplikasi IPTEKS     Open Access  
Bharatiya Vaigyanik evam Audyogik Anusandhan Patrika (BVAAP)     Open Access   (Followers: 1)
Bilge International Journal of Science and Technology Research     Open Access  
Biofuels Engineering     Open Access   (Followers: 1)
Biointerphases     Open Access   (Followers: 1)
Biomaterials Science     Full-text available via subscription   (Followers: 11)
Biomedical Engineering     Hybrid Journal   (Followers: 15)
Biomedical Engineering and Computational Biology     Open Access   (Followers: 13)
Biomedical Engineering Letters     Hybrid Journal   (Followers: 5)
Biomedical Engineering, IEEE Reviews in     Full-text available via subscription   (Followers: 21)
Biomedical Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 37)
Biomedical Engineering: Applications, Basis and Communications     Hybrid Journal   (Followers: 5)
Biomedical Microdevices     Hybrid Journal   (Followers: 8)
Biomedical Science and Engineering     Open Access   (Followers: 4)
Biomedizinische Technik - Biomedical Engineering     Hybrid Journal   (Followers: 1)
Biomicrofluidics     Open Access   (Followers: 4)
BioNanoMaterials     Hybrid Journal   (Followers: 2)
Biotechnology Progress     Hybrid Journal   (Followers: 40)
Bitlis Eren University Journal of Science and Technology     Open Access  
Boletin Cientifico Tecnico INIMET     Open Access  
Botswana Journal of Technology     Full-text available via subscription   (Followers: 1)
Boundary Value Problems     Open Access   (Followers: 1)
Brazilian Journal of Science and Technology     Open Access   (Followers: 2)
Broadcasting, IEEE Transactions on     Hybrid Journal   (Followers: 12)
Bulletin of Canadian Petroleum Geology     Full-text available via subscription   (Followers: 13)
Bulletin of Engineering Geology and the Environment     Hybrid Journal   (Followers: 14)
Bulletin of the Crimean Astrophysical Observatory     Hybrid Journal  
Cahiers, Droit, Sciences et Technologies     Open Access  
Calphad     Hybrid Journal   (Followers: 2)
Canadian Geotechnical Journal     Hybrid Journal   (Followers: 31)
Canadian Journal of Remote Sensing     Full-text available via subscription   (Followers: 42)
Case Studies in Engineering Failure Analysis     Open Access   (Followers: 6)
Case Studies in Thermal Engineering     Open Access   (Followers: 5)
Catalysis Communications     Hybrid Journal   (Followers: 6)
Catalysis Letters     Hybrid Journal   (Followers: 2)
Catalysis Reviews: Science and Engineering     Hybrid Journal   (Followers: 7)
Catalysis Science and Technology     Free   (Followers: 8)
Catalysis Surveys from Asia     Hybrid Journal   (Followers: 3)
Catalysis Today     Hybrid Journal   (Followers: 7)
CEAS Space Journal     Hybrid Journal   (Followers: 2)
Cellular and Molecular Neurobiology     Hybrid Journal   (Followers: 3)
Central European Journal of Engineering     Hybrid Journal  
Chaos : An Interdisciplinary Journal of Nonlinear Science     Hybrid Journal   (Followers: 2)
Chaos, Solitons & Fractals     Hybrid Journal   (Followers: 3)
Chinese Journal of Catalysis     Full-text available via subscription   (Followers: 2)
Chinese Journal of Engineering     Open Access   (Followers: 2)
Chinese Science Bulletin     Open Access   (Followers: 1)
Ciencia e Ingenieria Neogranadina     Open Access  
Ciencia en su PC     Open Access   (Followers: 1)
Ciencias Holguin     Open Access   (Followers: 3)
CienciaUAT     Open Access   (Followers: 1)
Cientifica     Open Access  
CIRP Annals - Manufacturing Technology     Full-text available via subscription   (Followers: 11)
CIRP Journal of Manufacturing Science and Technology     Full-text available via subscription   (Followers: 13)
City, Culture and Society     Hybrid Journal   (Followers: 21)
Clay Minerals     Full-text available via subscription   (Followers: 10)
Clean Air Journal     Full-text available via subscription   (Followers: 1)
Clinical Science     Full-text available via subscription   (Followers: 9)
Coal Science and Technology     Full-text available via subscription   (Followers: 3)
Coastal Engineering     Hybrid Journal   (Followers: 11)
Coastal Engineering Journal     Hybrid Journal   (Followers: 6)
Coatings     Open Access   (Followers: 4)
Cogent Engineering     Open Access   (Followers: 2)
Cognitive Computation     Hybrid Journal   (Followers: 4)
Color Research & Application     Hybrid Journal   (Followers: 2)
COMBINATORICA     Hybrid Journal  
Combustion Theory and Modelling     Hybrid Journal   (Followers: 14)
Combustion, Explosion, and Shock Waves     Hybrid Journal   (Followers: 14)
Communications Engineer     Hybrid Journal   (Followers: 1)
Communications in Numerical Methods in Engineering     Hybrid Journal   (Followers: 2)
Components, Packaging and Manufacturing Technology, IEEE Transactions on     Hybrid Journal   (Followers: 28)
Composite Interfaces     Hybrid Journal   (Followers: 7)
Composite Structures     Hybrid Journal   (Followers: 278)
Composites Part A : Applied Science and Manufacturing     Hybrid Journal   (Followers: 211)
Composites Part B : Engineering     Hybrid Journal   (Followers: 248)
Composites Science and Technology     Hybrid Journal   (Followers: 195)
Comptes Rendus Mécanique     Full-text available via subscription   (Followers: 2)
Computation     Open Access   (Followers: 1)
Computational Geosciences     Hybrid Journal   (Followers: 16)
Computational Optimization and Applications     Hybrid Journal   (Followers: 7)
Computational Science and Discovery     Full-text available via subscription   (Followers: 2)
Computer Applications in Engineering Education     Hybrid Journal   (Followers: 8)
Computer Science and Engineering     Open Access   (Followers: 19)
Computers & Geosciences     Hybrid Journal   (Followers: 31)
Computers & Mathematics with Applications     Full-text available via subscription   (Followers: 8)
Computers and Electronics in Agriculture     Hybrid Journal   (Followers: 5)
Computers and Geotechnics     Hybrid Journal   (Followers: 11)
Computing and Visualization in Science     Hybrid Journal   (Followers: 7)
Computing in Science & Engineering     Full-text available via subscription   (Followers: 33)
Conciencia Tecnologica     Open Access  
Concurrent Engineering     Hybrid Journal   (Followers: 3)
Continuum Mechanics and Thermodynamics     Hybrid Journal   (Followers: 8)

        1 2 3 4 5 6 7 | Last

Journal Cover
Bitlis Eren University Journal of Science and Technology
Number of Followers: 0  

  This is an Open Access Journal Open Access journal
ISSN (Online) 2146-7706
Published by Bitlis Eren Üniversitesi Homepage  [2 journals]
  • A Study of Artificial Neural Network Training Algorithms for
           Classification of Cardiotocography Signals

    • Authors: Zafer CÖMERT; Adnan Fatih KOCAMAZ
      Abstract: Cardiotocography (CTG) thatcontains fetal heart rate (FHR) and uterine contraction (UC) signals is amonitoring technique. During the last decades, FHR signals have been classifiedas normal, suspicious, and pathological using machine learning techniques. As aclassifier, artificial neural network (ANN) is notable due to its powerfulcapabilities. For this reason, behaviors and performances of neural networktraining algorithms were investigated and compared on classification task ofthe CTG traces in this study. Training algorithms of neural network werecategorized in five group as Gradient Descent, Resilient Backpropagation,Conjugate Gradient, Quasi-Newton, and Levenberg-Marquardt. Two different experimentalsetups were performed during the training and test stages to achieve moregeneralized results. Furthermore, several evaluation parameters, such as accuracy(ACC), sensitivity (Se), specificity (Sp), and geometric mean (GM), were takeninto account during performance comparison of the algorithms. An open access CTGdataset containing 2126 instances with 21 features and located under UCIMachine Learning Repository was used in this study. According to results ofthis study, all training algorithms produced rather satisfactory results. Inaddition, the best classification performances were obtained withLevenberg-Marquardt backpropagation (LM) and Resilient Backpropagation (RP) algorithms.The GM values of RP and LM were obtained as 89.69% and 86.14%, respectively. Consequently,this study confirms that ANN is a useful machine learning tool to classify FHRrecordings.
      PubDate: Tue, 26 Dec 2017 00:00:00 +030
       
  • Construction of an Economic Blanket Belt Oil Skimmer

    • Authors: Sumon KHANDAKAR; Md. Nasiqul ISLAM, Robiul Islam RUBEL, Sk. Suzauddin YUSUF
      Abstract: In this era of modern civilization, liquid fuel transport ismandatory around the world. But there has been several oil spilling accidentsaround the world and their negative effects are against all the livingelements. In the last decades Bangladesh face such problem randomly in sea areaand as well as in the river side damaging a large number of livings alongsidethe river having a badly effect on the entire ecology. The local residentscollect the spilled oil manually. The system is less efficient, slow and healthhazardous. Belt Oil skimmers using Polymer, Teflon, Elastomer, CorrosionResistant Steel materials belt are widely used for recovery of this oil.However, they are costly and unavailable. In this work a low cost simpleblanket belt skimmer device by using locally available equipment that will becapable to absorb the spilled oil rapidly from river water that is filled withanimal and plant waste. After constructing such oil skimmer, the performance isevaluated that accomplish two types of oil having different physicalproperties. Experimental analysis gives around 190 litre/hour of Sample-1 oilwhereas absorption rate for the Sample-2 oil is around 253 litre/hour for theconstructed device with minimum cost compare to the other conventional belt oilskimmer.
      PubDate: Tue, 26 Dec 2017 00:00:00 +030
       
  • Mammal Fauna of Ihlara Valley (Aksaray, Turkey)

    • Authors: Kubilay TOYRAN; Tarkan YORULMAZ, Serdar GÖZÜTOK
      Abstract: This study was conducted between 2010 and 2011. The goalof study is to identify mammal species in the area and determine factorsthreatening these species.  As a resultof field studies, totally 20 species were identified from the ordersEulipotyphla, Chiroptera, Lagomorpha, Rodentia, Carnivora, and Artiodactyla ofMammal class. Factors that threaten mammal species and protective measures weregiven.
      PubDate: Tue, 26 Dec 2017 00:00:00 +030
       
  • Application of wireless power system automation for electrical
           distribution system of Van, Turkey

    • Authors: Sabir RÜSTEMLİ; Abdulkadir ÖZER, Mehmet Nuri ALMALI, Mustafa AKDAĞ
      Abstract: Reliable real-time information has become an important factor forsafe delivery of power to the end-users and productivity of the electricutility and customer pleasure. Communication networks constitute the core ofelectrical system control applications in industry. The commercial andoperational demands of electric utilities need a high-performance data communicationnetwork that improves the electrical system performance and providespossibility of a detailed study to predict failures. Supervisory Control andData Acquisition (SCADA) systems are widely used in industry for supervisorycontrol and data acquisition of industrial processes. Users working in variousdepartments in an electric power company require access to SCADA data.Therefore, a design of cost-effective and reliable network architecture is avery important issue. Each network component has a specific address and themaximum amount of components is restricted for the communication channel andprotocol. In this paper, a power control application is studied by usingwireless technology, and a SCADA system along with the MODBUS protocol which isone of the most common communication protocols used in industrial environments.The application is carried out in a power distribution center found at theelectrical distribution system located in Van, Turkey.
      PubDate: Tue, 26 Dec 2017 00:00:00 +030
       
  • Investigation of Strength Characteristics of Natural Stones in Ürgüp
           (Nevşehir/Turkey)

    • Authors: Eren PAMUK; Aydın BÜYÜKSARAÇ
      Abstract: Natural Stones of Ürgüp (Nevşehir)have used commonly both indoor and outdoor due to easy give form at the stonequarry. That’s why some geotechnical and geomechanical tests must be done inorder to determine quality separation and strength characterisation.Destructive and non-destructive tests were done on the five different colored and featured samples (10×10×10 cm3)named Vişne, Devetüyü, Gülkurusu, KirliBeyaz and Sarı obtained from studyarea.  Theuniaxial stress test was made in the frame of destructive tests. Schmidthammer and ultrasound tests were applied in the frame of non-destructive tests.Results of destructive and non-destructive tests were compared and weaknessesand advantages of all methods were discussed.  One of the samples named Sarı has morestrength according to other samples. Gülkurusu and Kirli Beyaz samples have the lowest strength. Similarly, Schmidt hammer and ultrasound measurements gavehigh strength results. Because of destructive and non-destructive testingmethods from different natural stone samples with non-uniform mineralcombination were in accordance. Non-destructive testing methods can be used forstrength characterisation of natural stones. In this case, geomechanicalfeatures and quality ranks can be determined with in-situ tests without carry the samples to laboratories. 
      PubDate: Tue, 26 Dec 2017 00:00:00 +030
       
  • Determination of Radon Gas Activity Levels in Drinking Water in
           Ahlat/Bitlis

    • Authors: Muhammed Fatih KULUÖZTÜRK; Aydın BÜYÜKSARAÇ, Fahrettin ÖZBEY, Sezai YALÇIN
      Abstract: Radon gas (222Rn) that is a radioactive noble gas issecond important reason of lung cancer. The penetration of the radon gas intothe houses mostly takes place through the cracks in the building and tap water.Because of these reasons, radon gas detection in water is important for humanhealth. In this study radon gas activity levels have been determined in a totalof 14 tap water and spring water samples taken from different parts ofAhlat/Bitlis by AlphaGuard active radon detection system. Radon gas activitiesranged from 3.16 Bql-1 to 15.68 Bql-1 and mean value is10.11 Bql-1.
      PubDate: Tue, 26 Dec 2017 00:00:00 +030
       
  • Determining of Apoptosis at in vitro Conditioned DRG Neurons with TUNEL
           Method

    • Authors: Elif KAVAL OĞUZ
      Abstract: In this study, it was aimed to prove the way of invitro conditioned cells death. There is an increased axonal regeneration after aperipheral nerve is injured if it exposed to an earlier prior injury. The firstinjury causing the enhanced regeneration is called a conditioning lesion. Inthis study, Dorsal Root Ganglion primer cell culture was performed then neuronswere conditioned in vitro with an effective and new method. It was observed that invitro conditioned cells were regenerated much faster than control group cellsbut at the end of 48th hour, they died. The cell death way of thesein vitro conditioned neurons was determined by an in situ Cell Detection Kit Fluorescein and visualized byfluorescent microscopy. Finally, apoptotic cell deaths observed at in vitro conditioned neurons. This studyis important for the continuity of enhanced regeneration capacity ofconditioning lesion effect and neuronal survival and also it will provide thebasis for new studies.
      PubDate: Tue, 26 Dec 2017 00:00:00 +030
       
  • A Diagnostic Model for Identification of Myocardial Infarction from
           Electrocardiography Signals

    • Authors: Aykut DİKER; Zafer CÖMERT, Engin AVCI
      Abstract: Electrocardiography (ECG) is auseful test used commonly to observe the electrical activity of a heart.Recently, a growing relationship has been observed between diagnosis of adisease and using of machine learning techniques. In this scope, a diagnostic applicationmodel designed based on a combination of Recursive Feature Eliminator (RFE) andtwo different machine learning algorithms called as -nearestneighbors (-NN)and artificial neural network (ANN) is proposed for classification of ECGsignals in this study. The experiments performed on an open-access ECGdatabase. Firstly, the signals were passed a pre-processing step. Then, severaldiagnostic features from morphological and statistical domains were extractedfrom the signals. In the last stage of the analysis, RFE algorithm covering10-fold cross-validation and the mentioned machine learning techniques wereemployed to separate abnormal Myocardial Infarction (MI) samples from normal.The promising results as accuracy of 80.60%, sensitivity of 86.58% andspecificity of 64.71% were achieved. The validation of the contribution waschecked by comparing the performances of both -NNand ANN to related works. Consequently, the proposed diagnostic model ensuredan automatic and robust ECG signal classification model.
      PubDate: Tue, 26 Dec 2017 00:00:00 +030
       
  • Composition of the essential oils of two Teucrium species from Turkey

    • Authors: Şükrü HAYTA; Ayşe YAZGIN, Eyup BAĞCI
      Abstract: ABSTRACT:The chemicalcomposition of the essential oils of dried aerial parts of two Teucrium specieswere analyzed by GC and GC-MS. The essential oils of  two Teucriumspecies  were studied and eightycomponents, in all, were identified representing (90.8%) and (82.4%) of theoils respectively.  The oil of Teucrium polium L. subsp. poliumis characterized by the monoterpene b-pinene(10.2%) and the sesquiterpene germacrene D (10.1%), while that of Teucrium multicaule Montbret Et AucherEx Bentham hada higher contents of sesquiterpene caryophyllene oxide (31.1%). Quantitativeand qualitative variations were determined in the essential oil composition ofdifferent parts of the studied plant. The high amount of monoterpenes α- andβ-pinene and the sesquiterpene germacrene D, caryophyllene oxide make thestudied taxon a privileged potential source for pharmaceutical, cosmetic andindustrial products.
      PubDate: Tue, 26 Dec 2017 00:00:00 +030
       
  • Determination of fracture toughness parameters of concrete using compact
           pressure test

    • Authors: Esra TUGRUL TUNC
      Abstract: Fractures start with the formation of cracks and occur as the cracks spread in building materials. This causes significant damage to the buildings. Fracture mechanics is a science that investigates crack behavior, crack analysis and what to do for prevention of cracks. In the present study, concrete fracture toughness parameters were investigated by compact pressure test. In this context, research and a series of experiments were conducted on fractures, types of fractures, fracture mechanics, and compact pressure test. In the present empirical study, 5 unnotched and 15 notched, a total of 20 samples were used. 40 mm notches were created on notched samples. Cube splitting experiments were conducted using 10 mm wide strips on unnotched samples. For Type-I, Type-II and Type-III that were used in the calculation of the fracture toughness parameters of the said samples, fracture loads, tensile values and fractured sample details are presented. Since the concrete is a semi-brittle material, compact pressure samples were analyzed according to the principles of linear elastic fracture mechanics. It was concluded that the standard deviation for the critical fracture parameter (KIc) of the sample, which was naturally more stable than the present study, was smaller and as the structure size increased, the fracture toughness value increased as well.                
      PubDate: Tue, 26 Dec 2017 00:00:00 +030
       
  • Effect of Relay-Priority Mechanism on Multi-hop Wireless Sensor Networks

    • Authors: Davut ARI; Musa ÇIBUK, Fikri AĞGÜN
      Abstract: In multi-hop Wireless Sensor Networks (WSN), sensor nodes which cannot communicate directly with the Coordinator Node(CN) can communicate with CN thanks to the other joined sensor nodes. The multi-hop WSN structure is preferred for large-scale WSNs and that consist of multiple sensor and CN.As in the networks sensor node count increase, hop count increase as well. Because of this, end-to-end delay increases. Unless it is taken prevention, end-to-end delays reach a level that negatively effects on network performance in multi-hop WSN. In this study, for multi-hop WSNs, it is aimed to design a new a relay-priority mechanism which will reduce the end-to-end delay. This is a method that will reach the CN with a minimum hop count while joining the node. Thanks to the minimum hop, end-to-end delay is reduced. Performance analysis of this study was done in Riverbed (OPNET) Modeler simulation environment.
      PubDate: Tue, 26 Dec 2017 00:00:00 +030
       
 
 
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