Browsing Mühendislik Fakültesi by Issue Date
Now showing items 1-20 of 228
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Effects of alumina (Al2O3) addition on the cell structure and mechanical properties of 6061 foams
(Cambridge Univ Press, 2013)In this study, a powder blend representing 6061 Al-alloy was first mixed with Al2O3 ceramic particles and then foamed by using the powder compact melting method. 6061-Al2O3 foams and control specimens 6061 foams (without ... -
SAR moving target imaging using group sparsity
(European Signal Processing Conference, EUSIPCO, 2013)SAR imaging of scenes containing moving targets results in defocusing in the reconstructed images if the SAR observation model used in imaging does not take the motion into account. SAR data from a scene with motion can ... -
Sparsity-driven synthetic aperture radar imaging [reconstruction, autofocusing, moving targets, and compressed sensing]
(Ieee-Inst Electrical Electronics Engineers Inc, 2014)This article presents a survey of recent research on sparsity-driven synthetic aperture radar (SAR) imaging.In particular, it reviews 1) the analysis and synthesis-based sparse signal representation formulations for SAR ... -
Spatio-temporal accident analysis for accident prevention in relation to behavioral factors in driving: the case of South Anatolian Motorway
(Elsevier Sci Ltd, 2015)Analyzing the pattern of traffic accidents on road segments can highlight the hazardous locations where the accidents occur frequently and help to determine problematic parts of the roads. The objective of this paper is ... -
Design criteria for a high energy Compton Camera and possible application to targeted cancer therapy
(Iop Publishing Ltd, 2015)The proposed research focuses on the design criteria for a Compton Camera with high spatial resolution and sensitivity, operating at high gamma energies and its possible application for molecular imaging. This application ... -
Spatio-temporal pedestrian accident analysis to improve urban pedestrian safety: the case of the Eskişehir motorway
(Gazi University Eti Mahallesi, 2015)Determining pedestrian accident hotspots on road segments is a crucial part of the pedestrian safety assessment as it is used to prioritize problematic parts of a road network for in particularly planning and implementation ... -
Pilot-scale modeling of colloidal silica delivery to liquefiable sands
(Elsevier B.V., 2015)Passive site stabilization is a developing technology for the in situ mitigation of the risk of liquefaction without surface disruption. It involves the injection of stabilizing materials into liquefiable saturated sand. ... -
A 3D finite element analysis of the modular block retaining walls with corner turns
(Transportation Research Board, 2015)The design manuals for Geosynthetic Reinforced Soil retaining walls include the methodology for various conditions except the case where the wall has curved corner turns. Lately, there has been an increase in the frequency ... -
Numerical analysis of reinforced soil-retaining wall structures with cohesive and granular backfills
(ICE Publishing, 2015)The failure mechanisms of reinforced soil segmental walls with extensible reinforcements were studied by performing a numerical analysis using the finite element method. The numerical approach was first verified against ... -
Design of current-mode class 1 frequency-agile filter employing CDTAs
(Ieee, 2015)In this study, in order to demonstrate the versatility of the active building block so-called current differencing transconductance amplifier (CDTA), a current-mode (CM) frequency-agile filter (FAF) application circuit is ... -
Application of a pnCCD for energy-dispersive Lauc diffraction with ultra-hard X-rays
(Int Union Crystallography, 2015)In this work the spectroscopic performance of a pnCCD detector in the ultra-hard energy range between 40 and 140 keV is tested by means of an energy-dispersive Laue diffraction experiment on a GaAs crystal. About 100 Bragg ... -
Direct and indirect signal detection of 122 keV photons with a novel detector combining a pnCCD and a CsI(T1) scintillator
(Elsevier, 2016)By combining a low noise fully depleted pnCCD detector with a CsI(TI) scintillator, an energy-dispersive area detector can be realized with a high quantum efficiency (QE) in the range from below 1 keV to above 100 keV. In ... -
Prediction of bacterial virulent proteins with composition moment vector feature encoding method
(E D P Sciences, 2016)Prediction of bacterial virulent proteins is critical for vaccine development and understanding of virulence mechanisms in pathogens. For this purpose, a number of feature encoding methods based on sequences and evolutionary ... -
GamSim - a windows-based simulation tool for Gamma-Ray detector development
(Ieee, 2016)After the introduction of radiation simulation tools such as Geant4 or EGS in nuclear and high energy physics, the use in applied fields like nuclear medicine becomes increasingly important and a number of extensions have ... -
Preparation and characterization of porous hydroxyapatite pellets: effects of calcination and sintering on the porous structure and mechanical properties
(Sage Publications Ltd, 2016)In this study, porous hydroxyapatite structures were produced by using urea particles of 600-850 mu m size. Samples with two different urea composition (25 and 50 wt%) were prepared along with samples without any urea ... -
Feasibility of brain stroke imaging with microwaves
(Institute of Electrical and Electronics Engineers Inc., 2016)This paper investigates feasibility of detection of blooded area in a realistic head phantom with microwave imaging. Realistic phantom is illuminated by 36 line sources and the scattering field data is calculated numerically ... -
Calibration-free extraction of constitutive parameters of magnetically coupled anisotropic metamaterials using waveguide measurements
(Amer Inst Physics, 2017)A calibration-free method for extraction of electromagnetic properties of magnetically coupled anisotropic biaxial metamaterial (MM) slabs from waveguide measurements is proposed. It relies on three measurement steps (thru, ... -
Influence of urban built environment on traffic accidents: the case of Eskisehir (Turkey)
(Elsevier, 2017)This paper explores effects of urban the built environment on traffic accidents in the context of a developing country. The basic objective of this study is to use simple and practical models to analyze traffic accidents, ... -
Single-shot full strain tensor determination with microbeam X-ray Laue diffraction and a two-imensional energy-dispersive detector
(Int Union Crystallography, 2017)The full strain and stress tensor determination in a triaxially stressed single crystal using X-ray diffraction requires a series of lattice spacing measurements at different crystal orientations. This can be achieved using ... -
Comparison of deep drawability of AA5754-H22 and AA6061-T6 aluminum alloys for automotive applications
(Carl Hanser Verlag, 2017)Being one of the most commonly applied sheet metal forming processes in automotive industry, deep drawing technologies are challenged by the concerns of global warming for higher fuel economy requirements in the recent ...
