Now showing items 1-20 of 5691

    • GIS-Aided propagation prediction study for broadcast and telecommunication services 

      Altıntaş, Ayhan; Aksun, İrşadi; O., Balta; Köymen, Hayrettin; Topçu, Satılmış; Yurchenko, V. (2000)
    • Mikrodalga karasal radyo link analiz ve simülasyonlarının Rec. ITU-R P.530 tavsiyesine uygun olarak gerçeklenmesi 

      Göktaş, Polat; Topçu, Satılmış; Karaşan, Ezhan; Altıntaş, Ayhan (URSI, 2014)
      Bu çalışmada, NATO Band 3+ (1350 – 2690 MHz) ve NATO Band 4 (4400 – 5000 MHz) frekanslarında çalışan karasal mikrodalga radyo linklerin analizi için gerekli olan yansıma noktası hesabının iyileştirilmesi ve yansımadan ...
    • Sabit genişbant kablosuz sistem tasarımı için planlama metodu ve yazılımı 

      Güldoğan, M. Burak; Gürel, Sarper; Topçu, Satılmış (URSI, 2004)
      Genişbant Kablosuz Erişim (GKE) sistemleri, nüfus yoğunluğunun yüksek olduğu yerleşim yerlerinde özel ve tüzel ağ kullanıcılarına esnek ve çift yönlü veri dağıtımını sağlayan modern bir teknolojidir. Sabit GKE hakkında ...
    • Microarray data analysis and pathway activity inference in PATIKA 

      Babur, Özgün; Demir, Emek; Ayaz, Aslı; Doğrusöz, Uğur; Sakarya, Onur (ISCB Org, 2004)
      Pathway activity inference attempts to infer differential activity of cellular networks, given a qualitative state - transition model of the network and an expression profile of RNA molecules. We present an efficient ...
    • Pathway activity inference using microarray data 

      Babur, Özgün; Demir, Emek; Ayaz, Aslı; Doğrusöz, Uğur; Sakarya, Onur (Bilkent Center for Bioinformatics (BCBI), 2004)
      Motivation: Microarray technology provides cell-scale expression data; however, analyzing this data is notoriously difficult. It is becoming clear that system-oriented methods are needed in order to best interpret this ...
    • PATIKAweb: a Web service for querying, visualizing and analyzing a graph-based pathway database 

      Aksay, Çağrı; Arık, Fatma; Ataer, Esra; Ayaz, Aslı; Babur, Özgün; Belviranlı, Mehmet E.; Çetintaş, Ahmet; Çolak, Recep; Çözen, G.; Demir, Emek; Dilek, Alptuğ; Doğrusöz, Uğur; Giral, Erhan; Kaya, Engin; Küçük, Evren; Tekin, A. S.; Yıldırım, Hilmi; Erson, Zeynep (ISCB Org, 2005-06)
      PATIKAweb provides a Web service for retrieving and analyzing biological pathways in PATIKA database, which currently contains data integrated from popular public pathway databases like Reactome. It features a user-friendly ...
    • PATIKA: An informatics infrastructure for cellular networks 

      Aksay, Çağrı; Ayaz, Aslı; Babur, Özgün; Bilgin, C.; Çetintaş, Ahmet; Çivril, Ali; Çolak, Recep; Çözen, G.; Demir, Emek; Doğrusöz, Uğur; Erson, Zeynep; Gerdaneri, Ozan; Giral, Erhan; Güleşır, Gürcan; Nişancı, Gürkan; Sakarya, O.; Yıldırım, Hilmi (ISCB Org, 2004)
      The PATIKA Project aims for an informatics infrastructure to cope with the inherently complex cellular pathway data and provides software tools with sophisticated visualization technology around a central database using ...
    • Feasibility study of installation of solar panels on a high power HF antenna terrain 

      Abdul, Ali; Özbey, Burak; Topçu, Satılmış; Altıntaş, Ayhan (EMC Türkiye, 2015)
    • A new approach to diffraction modelling for line-of-sight (LOS) paths 

      Topçu, Satılmış; Göktaş, Polat; Karasan, Ezhan; Altıntaş, Ayhan (IEEE, 2015)
      In this paper, we present a new knife-edge diffraction method based on Bullington method for the terrestrial line-of-sight (LOS) paths. The diffraction loss of our new knife-edge diffraction method is compared with the ...
    • PATIKA: an integrated visual environment for collaborative construction and analysis of cellular pathways 

      Demir, Emek; Babur, Özgün; Doğrusöz, Uğur; Gürsoy, Atilla; Nişancı, Gürkan; Çetin Atalay, Rengül; Öztürk, Mehmet (American Society for Biochemistry and Molecular Biology(ASBMB), 2002-09)
    • Full‐brain coverage and high‐resolution imaging capabilities of passband b‐SSFP fMRI at 3T 

      Lee, J. H.; Dumoulin, S.; Sarıtaş, Emine Ülkü; Glover, G.; Wandell, B.; Nishimura, D.; Pauly, J. (Wiley‐Liss, Inc., 2008)
      Passband balanced-steady-state free precession (b-SSFP)fMRI is a recently developed method that utilizes the passband(flat portion) of the b-SSFP off-resonance response to measureMR signal changes elicited by changes in ...
    • Future outlook 

      Erdem, Talha; Demir, Hilmi Volkan (Springer, 2019-01)
      In this final Chapter, we present a future perspective for the light source design. We discuss the existing problems and briefly introduce new material systems and device architectures that can overcome the current issues.
    • How to design quality light sources with discrete color components 

      Erdem, Talha; Demir, Hilmi Volkan (Springer, 2019-01)
      White light sources using discrete emitters require careful design and optimization. The first step of the design should be determining the intended use of the light source so that application specific requirements can be ...
    • Common white light sources 

      Erdem, Talha; Demir, Hilmi Volkan (Springer, 2019-01)
      In this Chapter we describe the features of common light sources. We first present the spectral features of the sun and discuss its colorimetric properties. Next, we summarize the properties of traditional light sources ...
    • Metrics for light source design 

      Erdem, Talha; Demir, Hilmi Volkan (Springer, 2019-01)
      In this part of this brief, we summarize the metrics that need to be considered for designing light sources. We start with metrics on the shade of color and then continue with color rendering and photometry.
    • Colorimetry for LED lighting 

      Erdem, Talha; Demir, Hilmi Volkan (Springer, 2019-01)
      In this Chapter, we explain the basics of colorimetry and introduce the colorimetric tools useful for designing light sources.
    • Light stimulus and human eye 

      Erdem, Talha; Demir, Hilmi Volkan (Springer, 2019-01)
      In this Chapter, we summarize the structure of the human eye and introduce the sensitivity functions of various photoreceptors and present the visual regimes and corresponding eye sensitivity functions.
    • The biobjective multiarmed bandit: learning approximate lexicographic optimal allocations 

      Tekin, Cem (TÜBİTAK, 2019-03)
      We consider a biobjective sequential decision-making problem where an allocation (arm) is called ϵ lexicographic optimal if its expected reward in the first objective is at most ϵ smaller than the highest expected reward, ...
    • Comparison of geometric and drive-induced nonlinearities in doubly clamped, thermoelastic nanoelectromechanical systems 

      Hanay, Mehmet Selim (TÜBİTAK, 2019-06)
      The performance of resonant sensors based on nanoelectromechanical systems depends critically on the maximum amplitude of oscillation reached in the linear regime. The maximum linear amplitude is determined by nonlinear ...
    • Effects of the AlN nucleation layer thickness on the crystal structures of an AlN epilayer grown on the 6H-SiC substrate 

      Arslan, Engin; Öztürk, M. K.; Özçelik, S.; Özbay, Ekmel (Taylor & Francis, 2019-04-08)
      The influence of the LT-AlN(NL) growth times on the mosaic structure parameters of the AlN layer grown on the LT-AlN(NL)/6H-SiC structures as well as the dislocation densities and the strain behaviours in the AlN epilayers ...