Güncel Gönderiler: Piri Reis University Institutional Repository
Toplam kayıt 1750, listelenen: 581-600
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A methodology proposal for supplier performance evaluation: Fuzzy DEMATEL method with sustainability integrated SCOR model
(Springer Verlag, 2020)Overall performance of an organization’s supply chain depends on each one of the coordinated and collaborated chain partners’ performance. Therefore, supplier evaluation and development is a prerequisite that should be ... -
Spacetimes admitting the Z-symmetric tensor
(Natl Inquiry Services Centre Pty Ltd, 2020)This paper aims to introduce the spacetimes admitting the Z-symmetric tensor. We investigate the properties of these spacetimes for a perfect fluid and a pressureless perfect fluid (a dust). Some theorems about the properties ... -
The Impact of Mass Media Tools On Efl Students' Speaking Skills
(2016)It is a well-known fact that mass media tools have tremendous impact on people all around the world, and it is also becoming a significantly important research area for scholars, educators and researchers in applied ... -
Düşük Seviyede İngilizce Bilgisine Sahip, Yabancı Dili İngilizce Olan Öğrencilerin Derleme Dayalı Dilbilgisi Öğrenimi Hakkındaki Görüşleri
(2017)Bu nitel çalışmanın birincil amacı, Brigham Young Üniversitesiİngiliz Milli Derlemi (BYU-BNC) veya küçük bir derlemle çalışan AntConc (ücretsiz kelime dizini programı) ile öğrenim gören düşük seviyede İngilizce bilgisine ... -
Kademeli Kayar Artımlı Şekillendirme Yöntemi ile Parça Üretiminin Optimizasyonu
(2020)Bu çalışmada kayar artımlı şekillendirme metodu kullanılarak,farklı açı artımlarıyla,kademeli şekillendirme yapılarak duvar açısı dik olan parçanın üretimoptimizasyonu yapılmıştır.Çalışma kapsamındasinyal/gürültü analizi ... -
DKP37 Sacının Kayar Artımlı Şekillendirme (TPIF_RL) Yöntemiyle Şekillendirme İşleminin Taguchi ve Cevap Yüzey Metodu ile Optimizasyonu
(2019)Artımlı şekillendirme yöntemi metal endüstrisinde kullanılan hızlı ve ucuz bir prototip üretim yöntemidir. Bu yöntem değişik endüstri alanlarında geniş bir kullanım potansiyeline sahiptir. Bu çalışmada; DKP37 sacının TPIF_RL ... -
Sürtünme Karıştırma Kaynağı Yapılmış Alüminyum Alaşımlarının Isı Akışının Modellemesi ve Pratik Doğrulaması
(2017)Bu makalede AA 6061-T6 alüminyum alaşımının sürtünme karıştırma kaynağının Comsol Multiphysics 3.5a ile yapılan üç boyutlu modellemesi anlatılmıştır. Simülasyon kaynak edilecek iki alüminyum levhasını, kaynak takımını ve ... -
Analysis of the residual stresses and deformations during the autogenous GTAW process
(Emerald Group Publishing Ltd, 2021)Purpose The gas tungsten arc welding (GTAW) process is a widely used process that produces quality weldments. But the high heat generation from the GTAW arc can cause extreme temperatures as high as 20,000 degrees C. The ... -
Selection of welding conditions for minimizing the residual stresses and deformations during hard-facing of mild steel
(Brodarski Institute, 2021)Hard-facing process is widely used for improving the wear resistance of mild steel. During the application of hard-facing, due to high temperatures, residual stresses and deformations may occur. The tensile residual stresses ... -
Numerical simulation of pressure loss in porous media in oscillating flow
(World Scientific and Engineering Academy and Society, 2018)In this study, the pressure loss in two types of porous media for both unidirectional and oscillatory flows is analyzed using commercial software Comsol©. The numerical results are compared with those obtained in the ... -
Hydrodynamic aspects of oscillating flow through porous media consisting of steel spheres
(Springer International Publishing, 2014)Hydrodynamic aspects of oscillating flow through porous media are investigated within the scope of this experimental work where water is used as the flow medium. Friction factors are found reducing the data of hydrodynamic ... -
A Practical Tool for Evaluating Refrigeration Systems Using R-134a
(2017)Bu teorik çalışmada R-134a (Tetrafloretan, klor içermeyen bir soğutucu akışkan) kullanılan buhar sıkıştırmalı soğutma çevrimi 100-200 kPa buharlaştırma basıncı aralığında, 0.8-1.6 MPa yoğuşturucu basıncı aralığında olmak ... -
Three-parameter (3P) weibull distribution for characterization of strength of ceramics showing R-Curve behavior
(Elsevier Sci Ltd, 2021)Strength distribution of advanced ceramics is commonly characterized by two-Parameter (2P) Weibull distribution. However, deviation of strength distribution from 2P-Weibull distribution may occur in ceramics due to various ... -
Data-Driven Generative Design Integrated with Hybrid Additive Subtractive Manufacturing (HASM) for Smart Cities
(Springer, 2021)Generation of smart cities that considers environmental pollution, waste management, energy consumption and human activities has become more important in recent years since it was first introduced in the 1990s. In the smart ... -
Fuel or acceleration: A pareto design procedure for ships
(CRC Press/Balkema, 2018)Ship design, as all other designs, is continuously changing. The design method used in this study is to calculate ship resistance and ship motion with algorithms and then to calculate the dynamic effects such as acceleration, ... -
Multi Objective Design of Ships; A Pareto Procedure
(Springer Science and Business Media Deutschland GmbH, 2021)The design calculations for a displacement type vessel and for a planing hull are done for the main dimensions, starting with a fuel and acceleration criteria. A large number of vessels are simulated with the help of ... -
Weighted approximation by q-Ibragimov-Gadjiev operators
(Univ Osijek, Dept Mathematics, 2020)The present paper deals with a q-generalization of Ibragimov-Gadjiev operators, which were constructed by Ibragimov and Gadjiev in 1970. We study convergence properties on the interval [0, infinity) and obtain the rate of ... -
Second-order wave diffraction by horizontal rectangular barriers
(2011)A complete second-order analytical solution for the nonlinear diffraction of waves by 2-D rectangular cylinders fixed at the free surface of finite-depth waters is presented. As a sequel to a previous linear treatment of ... -
A numerical study on squat of a wigley hull
(2011)A numerical study is conducted to calculate the squat for a wigley hull. An approach based on slender body theory is used to convert the three dimensional ship problem into a series of two dimensional problems in cross ... -
Powering and seakeeping characteristics of a displacement hullform with waterline parabolization
(2010)Waterline parabolization is a design procedure used for displacement vessels to decrease the wave resistance of the hullform through the addition of amidships bulbs. The bow and shoulder wave system of a parent hullform ...
