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Browsing by Author "Çil, Celal Zaim"

Browsing by Author "Çil, Celal Zaim"

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  • Beam wander characteristics of cos and cosh-Gaussian beams 
    Çil, Celal Zaim; Eyyuboğlu, Halil T.; Baykal, Yahya; Cai, Yangjian (Springer, 2009-06)
    Within the context of a general beam formulation, beam wander characteristics of cos and cosh-Gaussian beams are derived and numerically evaluated. In our graphs, the fundamental Gaussian beam is used as a benchmark for ...
  • Beam wander of dark hollow, flat-topped and annular beams 
    Eyyuboğlu, Halil T.; Çil, Celal Zaim (Springer Heidelberg, 2008-11)
    Benefiting from the earlier derivations for the Gaussian beam, we formulate beam wander for dark hollow (DH) and flat-topped (FT) beams, also covering the annular Gaussian (AG) beam as a special case. Via graphical ...
  • Beam Wander of J (0)- and I (0)-Bessel Gaussian Beams Propagating In Turbulent Atmosphere 
    Çil, Celal Zaim; Eyyuboğlu, Halil T.; Bykal, Yahya; Korotkova, Olga; Cai, Yangjian (Springer, 2010-01)
    Root mean square (rms) beam wander of J (0)-Bessel Gaussian and I (0)-Bessel Gaussian beams, normalized by the rms beam wander of the fundamental Gaussian beam, is evaluated in atmospheric turbulence. Our formulation is ...
  • Beam wander of J (0)- and I (0)-Bessel Gaussian beams propagating in turbulent atmosphere 
    Çil, Celal Zaim; Eyyüboğlu, Halil Tanyer; Baykal, Yahya Kemal; Korotkova, O.; Cai, Y. (2010-01)
    Root mean square (rms) beam wander of J (0)-Bessel Gaussian and I (0)-Bessel Gaussian beams, normalized by the rms beam wander of the fundamental Gaussian beam, is evaluated in atmospheric turbulence. Our formulation is ...
  • Beam wander of J (0)- and I (0)-Bessel Gaussian beams propagating in turbulent atmosphere 
    Çil, Celal Zaim; Eyyuboğlu, Halil T.; Baykal, Yahya; Korotkova, Olga; Cai, Yangjian (Springer, 2010-01)
    Root mean square (rms) beam wander of J (0)-Bessel Gaussian and I (0)-Bessel Gaussian beams, normalized by the rms beam wander of the fundamental Gaussian beam, is evaluated in atmospheric turbulence. Our formulation is ...
  • Design of LED circuit card for an off-road lamp 
    Yakışır, B.; Çil, Celal Zaim (2010)
    In this study a working lamp used on the working machines is designed by using the LED diodes instead of a halogen bulb. In the design, firstly a LED or a LED array and a proper driver circuit that can provide the required ...
  • Desıgnıng an off-road workıng lamp wıth leds 
    Çil, Celal Zaim; Yakışır, Burcu (2011)
    In this study a working lamp used on the offroad working machines and vehicles is designed by using the LED diodes instead of a halogen bulb. In the design, firs tly a LED array is determined and a proper driver circuit ...
  • Intensity fluctuations of partially coherent cos Gaussian and cosh Gaussian beams in atmospheric turbulence 
    Baykal, Yahya; Eyyuboğlu, Halil T.; Çil, Celal Zaim; Cai, Yangjian; Korotkova, Olga (IOP Publishing Ltd, 2011-05)
    On-axis and off-axis scintillation indices of partially coherent collimated cos Gaussian and cosh Gaussian beams are evaluated on their propagation in a weakly turbulent atmosphere. In the coherent limits, our results are ...
  • Işık hüzmesi profili ölçme sistemi 
    Bük, Murat; Baki, T.; Çil, Celal Zaim; Cambaz, Göknur; Baykal, Yahya Kemal; Erseven, S.; Karabulut, S.; Ertuğ, A. Mithat (2011)
  • Işık Yayan Diyotlar (LED’LER) ve Aydınlatmada Kullanımı 
    Çil, Celal Zaim (2014)
    LED’ler ışık saçan yarı-iletken p-n diyotlardır. Bir p-n ekleminde iletim yönünde akım geçtiği zaman elektronlar ve delikler p ve n yarı-iletkenin birleştiği eklem bölgesinde birbiri ile karşılaşır ve birleşirler. Aslında ...
  • LED’lerin Spektrofotometride Kullanımı 
    Yurttaş, Hüseyin Galip; Özdumanlar, Sercan; Cambaz Büke, Göknur; Çil, Celal Zaim; Kamışlı, Özcan; Ertuğ, A. Mithat (2011)
    Işık yayan diyotların (Light Emitting Diode-LED) ışık yayma modunda verici olduğu, fotodiyot veya güneş pili modunda alıcı olduğu bir düzenek oluşturularak LED’lerin çeşitli ışık şiddetleri altında ürettikleri fotoakım değerleri ...
  • Literature Review on Cyber Security Investment Decisions 
    Çil, Celal Zaim; Şentürk, Hakan; Sağıroğlu, Şeref (Gazi Univ, 2016-03)
    Severe financial losses incurred by cyber security attacks with increasing complexity and frequency, as well as booming cyber security sector offering variety of products as investment options have led the focus of the ...
  • Partially coherent elegant Hermite-Gaussian beams 
    Wang, F.; Cai, Yangjian; Eyyuboğlu, Halil T.; Baykal, Yahya; Çil, Celal Zaim (Springer, 2010-09)
    Elegant Hermite-Gaussian beams (EHGBs) are extended to the partially coherent case. An explicit and analytical formula is derived for the cross-spectral density of a partially coherent EHGB propagating through an aligned ...
  • Siber Güvenlik Yatırım Kararları Üzerine Literatür İncelemesi 
    Şentürk, Hakan; Çil, Celal Zaim; Sağıroğlu, Şeref (2016)
    Karmaşıklığı ve sıklığı her geçen gün artan siber saldırıların yol açtığı yüksek ekonomik zararlar ile bu saldırılara karşı korumasağlayan çok sayıda siber güvenlik teknolojisi ürünlerinin yatırım alternatifi olarak sunulduğu ...