Güncel Gönderiler: Mühendislik ve Doğa Bilimleri Fakültesi
Toplam kayıt 697, listelenen: 581-600
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The Effect of Excess Y2O3 Addition on the Mechanical Properties of Melt-Processed YBCO Superconductor
(SPRINGER, 233 SPRING ST, NEW YORK, NY 10013 USA, 2010-12)In this study, two kinds of melt-processed YBCO samples with Y2O3 addition were fabricated and their microstructures were defined by XRD analysis and polarized light optical microscopy. The mechanical properties of these ... -
Levitation force at different temperatures and superconducting properties of nano-structured MgB2 superconductors
(ELSEVIER SCIENCE SA, PO BOX 564, 1001 LAUSANNE, SWITZERLAND, 2010-03-04)The levitation and pinning force properties of nanocrystalline MgB2 superconductors prepared by a mechanical alloying technique with varying milling duration have been investigated. Levitation force measurements under ... -
Comparison of levitation force relative to thickness of disk shaped YBa2Cu3O7-x prepared by MPMG and FQMG processes
(ELSEVIER SCIENCE SA, PO BOX 564, 1001 LAUSANNE, SWITZERLAND, 2009-11-20)The precursor YBCO in the stoichiometric ratio of 1:23 were fabricated using the melt-powder-melt-growth (MPMG) technique, and flame-quench-melt-growth (FQMG) technique. The superconducting regions were determined by ... -
Complete flux jumping in nano-structured MgB2 superconductors prepared by mechanical alloying
(ELSEVIER SCIENCE SA, PO BOX 564, 1001 LAUSANNE, SWITZERLAND, 2009-07-08)High density nano-crystalline MgB2 bulk superconductors with induced pinning centres were prepared from elemental precursors by a sequence of ball milling, heat treatment, and final pressing. The XRD results revealed the ... -
Fabrication and properties of dense ex situ magnesium diboride bulk material synthesized using spark plasma sintering
(IOP PUBLISHING LTD, DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND, 2009-09)High density ex situ magnesium diboride bulks were synthesized from commercial MgB(2) powder using spark plasma sintering under a range of applied uniaxial pressures between 16 and 80 MPa. The microstructure was characterized ... -
Fast practical analytical model for analysis of backfill-rectangular tank-fluid interaction systems
(Elsevier Sci Ltd, 2012)The paper describes a simple, efficient and reasonably accurate analytical model for analysis of backfill-rectangular tank-fluid interaction systems. The presented model uses Housner's two-mass approximation for fluid ... -
The Effect of Y2O3 on AC Susceptibility Measurements of MPMG YBCO Superconductor
(SPRINGER, 233 SPRING ST, NEW YORK, NY 10013 USA, 2013-04)In this study, two kinds of melt-powder-melt-growth (MPMG) YBCO sample grown on a buffer layer of Y2O3 addition were fabricated. The compacted powders were located on a crucible with Y2O3 powder freely poured and a buffer ... -
Experimental analysis on FEM definition of backfill-rectangular tank-fluid system
(Techno-Press, 2013)In the present study, the numerical and experimental investigations were performed on the backfill- exterior wall-fluid interaction systems in case of empty and full tanks. For this, firstly, the non-linear three dimensional ... -
Evaluation of the effect of earthquake frequency content on seismic behavior of cantilever retaining wall including soil-structure interaction
(Elsevier Sci Ltd, 2013)A three-dimensional backfill-structure-soil/foundation interaction phenomenon is simulated using the finite element method in order to analyze the dynamic behavior of cantilever retaining wall subjected to different ground ... -
Influence of wall flexibility on dynamic response of cantilever retaining walls
(Techno-Press, 2014)A seismic evaluation is made of the response to horizontal ground shaking of cantilever retaining walls using the finite element model in three dimensional space whose verification is provided analytically through the modal ... -
Backfill and subsoil interaction effects on seismic behavior of a cantilever wall
(Techno-Press, 2014)The main focus of the current study is to evaluate the dynamic behavior of a cantilever retaining wall considering backfill and soil/foundation interaction effects. For this purpose, a three-dimensional finite element model ... -
Landslide susceptibility mapping for a landslide-prone area (Findikli, NE of Turkey) by likelihood-frequency ratio and weighted linear combination models
(Springer, 2008)Landslides are very common natural problems in the Black Sea Region of Turkey due to the steep topography, improper use of land cover and adverse climatic conditions for landslides. In the western part of region, many ... -
Investigation of abrasion resistance of cement mortar with different pozzolanic compositions and subjected to sulfated medium
(Elsevier Sci Ltd, 2010)The durability phenomenon for concrete, or cement mortar, has gained attention recently as one of the important mechanical properties. It can be described as concrete's resistance to the destructive influences of a medium ... -
The effects of the fiber contents on the mechanic properties of the adobes
(Construction and Building Materials, 2008-03)In this study, compression and tensile tests were conducted for five different adobe mixtures. The important part of this study consisted of uniaxial compressive tests done with natural fiber mixtures. Thus, the results ... -
Study of Effects of natural Pozzalan on Properties of Cement Mortars, Journal of Materials in Civil Engineering
(Journal of Materials in Civil Engineering, 2006-12)Natural pozzolans, also known as trass, can be used in cement manufacturing due to their cementitious properties after reaction with calcium hydroxide. At different mixture proportions, the strength, setting time, workability, ... -
Yapı Denetimi Kanununda Meslek Etiği İhlalleri
(İnşaat Mühendisleri Odası, 2013-10-05)Türkiye’de yapı denetimi, 4708 sayılı Yapı Denetimi Hakkında Kanuna ve bu kanuna dayalı olarak hazırlanan Yapı Denetimi Uygulama Yönetmeliğine göre yapılmaktadır. 4708 Sayılı Kanun ve bu kanuna dayalı çıkarılan yönetmelik ... -
TÜRKİYE’DE YAPI DENETİMİN DENETİMİ
(İnşaat Mühendisleri Odası, 2013-10-05)Türkiye’de yapı denetimi, 4708 sayılı Yapı Denetimi Hakkında Kanuna dayalı olarak, Bakanlıktan aldığı izin belgesi ile çalışan ve münhasıran yapı denetimi ile uğraşan tüzel kişiliğe sahip Yapı Denetim Kuruluşları tarafından ... -
Correlation between CPT and SPT in Adapazari, Turkey
(2nd International Syposium on Cone Penetration Testing, Huntington Beach/California, 2010-05-09)In literature, it is known that there are different correlations between Cone Penetration Test (CPT) and Standard Penetration Test (SPT). Generally, these investigations have been done in homogeneous soils or similar ... -
Fizik Öğretmenleri için Üniversite Destekli bir Hizmet içi Eğitim Model Önerisi
(The Turkish Online Journal of Educational Technology (TOJET), 2004-01)Eğitim literatürümüzde hizmet içi eğitimle ilgili yürütülen bir çok araştırmanın sonuçları MEB tarafından fen ve fizik öğretmenleri için yeterli sayıda ve etkili hizmet içi eğitim kurslarının düzenlenmediğini, ayrıca merkezi ... -
Fizik Laboratuarlarına Yönelik Hazırlanan Bir Hizmet İçi Eğitim Programının Değerlendirilmesi
(Pamukkale Üniversitesi Eğitim Fakültesi Dergisi, 2004)Eğitim sisteminin en önemli unsuru olan öğretmenlerin mesleğe hazırlanmaları hizmet öncesi dönemde öğretmen eğitimi programlarıyla olurken, mesleki gelişimleri kendilerine yönelik hazırlanan hizmet içi eğitim programları ...
