Ara
Toplam kayıt 865, listelenen: 461-470
Security of chaotic cryptosystems
(Işık Üniversitesi, 2008)
In this thesis, we tried to show the weaknesses of chaotic cryptosystems. We break four chaos-based cryptosystems and proved our attacks. In our first cryptanalysis, we broke a cryptosystem based on two dimensional chaotic ...
Semi-automatic customization for modeling human face
(Işık Üniversitesi, 2012-02-14)
Model-based vision has firmly established its roots as a robust approach in rec-ognizing and locating known traits in rigid objects even under the presence of noise, clutter and occlusion. However the application of such ...
Evolving strategies for web crawler
(Işık Üniversitesi, 2009-05-06)
With the rapid growth of Internet and Internet-based information, it becomes the largest and publicly accessible data source in the world. Every day millions of information available so to achieve information becomes harder. ...
Spline based neural networks
(Işık Üniversitesi, 2005-06)
In this thesis, we applied the Catmull-Rom splines and B-splines to the neural networks models, which are Multi Layer Perceptrons, Elman Networks, and Locally Recurrent Neural Networks, as adaptive activation functions. ...
Land art ve mekan bağlamında süre, süreç, temsiliyet problematiğinin dil ve mekan ilişkisi : sanatçının varoluşsal uzamı
(Işık Üniversitesi, 2018-06-07)
This study that I performed over the existential space of artist with an existential perspective has formed by examining the linguistic and spatial relation of time, process and representation of ‘Land Art’, which arose ...
9-12 yaş grubu çocukların çizdikleri resimlerle depresyon, kaygı ve özsaygı değişkenleri arasındaki ilişkilerin incelenmesi
(Işık Üniversitesi, 2018-06-04)
Amaç: Bu çalışmanın amacı 9-12 yaş grubu çocukların depresyon kaygı ve özsaygı gibi ruh sağlığı değişkenleri ile çocuk çizimlerinden ruh sağlığına dair elde edilen ipuçları arasındaki olası ilişkileri araştırmaktır. Toplamda ...
Design and optimization of multiuser cooperative protocols for wireless networks
(Işık Üniversitesi, 2014-09-12)
Recently, the main trend in wireless communications has shifted from voice transmission to data communication. Naturally, this shift caused an increase in the data rate and bandwidth requirements. Being a limited and thus ...
Cooperative strategies, achievable rates and resource allocation for OFDMA channels
(Işık Üniversitesi, 2011-07-28)
The design of next generation wireless communication systems brings along new challenges, since the degrading factors such as fading and multi-user interference become harder to deal with as the number of users and the ...
Ring array processing for forward-looking intravascular and intracardiac ultrasonic imaging
(Işık Üniversitesi, 2010-06-08)
Forward-looking (FL) catheter-based imaging systems are highly desirable for guiding interventions in IVUS and ICE applications. One of the main challenges in the array based FLIVUS systems is the large channel count which ...
New approaches for channel estimation in wireless communications
(Işık Üniversitesi, 2006-03-10)
This thesis first proposes a conputationally efficient, pilot-aided linear minimum mean square error (MMSE) batch channel estimation algorthm for the orthogonal frequency division multiplexing OFDM systems in unkonown ...