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Now showing items 1-20 of 80

A case study on web-based information system evaluation

Tokdemir, Gül; Bilgen, Semih; Ercil, Yavuz (ACAD Conferences Ltd, 2014)

A new framework is proposed to assess web-based information systems (WISs) which is domain-independent, that is, can be applied for profit seeking as well as service oriented or non-profit seeking organizations. Assessment ...
A New Narrow Band Dual-Mode Microstrip Slotted Patch Bandpass Filter Design Based On Fractal Geometry

Mezaal, Yaqeen S.; Eyyuboğlu, Halil T. (IEEE, 2012)

A narrowband, compact, and easily fabricated microstrip bandpass filter design is introduced in this paper as a candidate for use in modern wireless systems. The proposed filter design is based on the use of dual-mode (two ...
A Study of the Information Services On Turkish High Schools

Darvish, Hamid R. (Elsevier Science BV, 2011)

The World Wide Web went public in 1989. Since then, every organization has come to utilize web-based technologies for their various purposes. Educational institutions have implemented web technology in their contemporary ...
About nanometer sized analogues of basic electronic and optical components

Quandt, Alexander; Özdoğan, Cem; Ferrari, Maurizio; Speranza, Giorgio (IEEE, 2008)

We discuss a downsizing of optical components into the nanometer range. It presupposes the substitution of photons by ballistic electrons, but it also requires a simple and robust concept to assemble the analogues of basic ...
Adaptive Embedded Zero Tree For Scalable Video Coding

Choupani, Roya; Wong, Stephan; Tolun, Mehmet R. (Int Assoc Engineers-Laeng, 2011)

Video streaming over the Internet has gained popularity during recent years mainly due to the revival of video-conferencing and video-telephony applications and the proliferation of (video) content providers. However, the ...
Alternative Enhancement of Associativity Based Routing (Aeabr) for Mobile Networks

Preveze, Barbaros; Safak, Aysel (Springer, 2010)

This study proposes an alternative enhancement for the Enhanced Associativity Based Routing (EABR) method which is a derivation of ABR (Associativity Based Routing) by relative speed and relative distance estimation using ...
An Electromagnetic Micro-Power Generator for Low Frequency Vibrations With Tunable Resonance

Türkyılmaz, S.; Zorlu, O.; Muhtaroğlu, A.; Kulah, Haluk (Elsevier Science BV, 2011)

This paper presents an electromagnetic (EM) micro-power generator with tunable resonance frequency which can harvest energy from low frequency environmental vibrations. The reported power generator up-converts low frequency ...
Analysis of delay factors for voice over WiMAX

Şafak, A.; Preveze, B. (IEEE, 2008)

This paper presents the results of our computer simulation for delays experienced by voice packets over WiMAX 802.16e protocol running over an enterprise packet network connected to public internet. In the simulation we ...
Analysis of wave structure functions

Eyyuboğlu, Halil T. (IEEE, 2008)

Wave structure function (WSF) of spherical wave is used in extended Huygens-Fresnel integral to induce the effect of turbulent atmosphere on the propagating laser beam. Depending on the approximation made and the choice ...
Analytical Solution of Thermal Stresses In A Functionally Graded Solid Cylinder Within Parabolic Continuous Grading

Öztürk, Ali; Gülgeç, Müfit (Trans Tech Publications LTD, 2012-12-21)

This paper presents analytical solutions of the thermal stresses in a functionally graded solid cylinder with fixed ends in elastic region. These thermal stresses are due to the uniform heat generation inside the cylinder. ...
Aperture Averaging of Focused Multi-Gaussian Beams

Kamacıoğlu, Canan; Baykal, Yahya; Yazgan, Erdem (Electromagnetics Acad, 2013)

We investigate the behavior of the power fluctuations of the focused annular and flat-topped beams when a realistic receiver possessing a finite sized aperture is employed in turbulent atmospheric optics links. Employing ...
Approaches on the selection of web cameras and calibration targets for stereo vision

Eren, Hüseyin; Çelik, Ümit; Poyraz, Mustafa (IEEE, 2006)

In this paper, it is studied on the calibration by using specified web cameras. The performance of 3D computer vision depends on the accuracy of camera parameters. Therefore, camera calibration is very crucial in stereo ...
Automatic detection of mitochondria from electron microscope tomography images: a curve fitting approach

Taşel, Faris Serdar; Hassanpour, Reza; Mumcuoğlu, E. U.; Perkins, Guy; Martone, Maryann (Spie-Int Soc Optical Engineering, 2014)

Mitochondria are sub-cellular components which are mainly responsible for synthesis of adenosine tri-phosphate (ATP) and involved in the regulation of several cellular activities such as apoptosis. The relation between ...
Average received intensity for optical beam of arbitrary field profile after propagation in turbulent atmosphere

Arpalı, Çağlar; Baykal, Yahya (Spie-Int Soc Optical Engineering, 2009)

Employing our previously obtained formulation of the average received intensity for arbitrary optical beam in turbulent atmosphere, intensity patterns of already known and new source profiles are obtained. Arbitrary beam ...
Beam Wander Characteristics of Flat-Topped, Dark Hollow, Cos and Cosh-Gaussian, J(0)- And I-0- Bessel Gaussian Beams Propagating In Turbulent Atmosphere: A Review

Eyyuboğlu, Halil T.; Baykal, Yahya; Çil, Celal Z.; Korotkova, Olga; Cai,Yangjian (Spie-Int Soc Optical Engineering, 2010)

In this paper we review our work done in the evaluations of the root mean square (rms) beam wander characteristics of the flat-topped, dark hollow, cos-and cosh Gaussian, J(0)-Bessel Gaussian and the I-0-Bessel Gaussian ...
Beams with arbitrary field profiles in turbulence - art. no. 652209

Baykal, Yahya (Spie-Int Soc Optical Engineering, 2006)

Characteristics of optical beam incidences that have arbitrary field profiles are examined when they propagate in the turbulent atmosphere. Arbitrary source field profile is introduced by decomposing the source into ...
Bit error rates for focused general-type beams

Altay Arpalı, Serap; Baykal, Yahya (Electromagnetics Acad, 2009)

Using the scintillation index of general beam formulation, bit error rate (BER) is investigated for focused Gaussian, cos-Gaussian, cosh-Gaussian and annular beams in weak atmospheric turbulence. We have employed our ...
Choosing parameters to achieve a higher success rate for hellman time memory trade off attack

Saran, Nurdan; Doğanaksoy, Ali (IEEE, 2009)

In 1980, Hellman proposed the Time Memory Trade Off (TWTO) attack and applied it on block cipher DES (Data Encryption Standard). Time Memory Trade Off attack is one of the methods that inverts a one way function. The ...
Clustering Analysis for Vasculitic Diseases

Yıldırım, Pınar; Çeken, Çınar; Çeken, Kağan; Tolun, Mehmet R. (Springer-Verlag Berlin, 2010)

We introduce knowledge discovery for vasculitic diseases in this paper. Vasculitic diseases affect some organs and tissues and diagnosing can be quite difficult. Biomedical literature can contain hidden and useful knowledge ...
Comparative Analysis of Novel Long Life Routing Methods In Mobile Networks

Preveze, Barbaros; Safak, Aysel (IEEE, 2010)

In this study we propose two novel ABR extended Long Life Routing Methods called Alternative enhancement for Enhanced Associativity Based Routing (AEABR) and Associativity Tick Averaged ABR (ATAABR) methods which are also ...

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