Graduate School of Informatics

Msc. Candidate: Burak Çelik

Program: Cyber Security

Date: 04.09.2019 14:00 p.m

Place: A-212

Abstract: This thesis presents several optimization techniques of AES implementations on CUDA. 6 different CUDA kernels are implemented for AES-128 exhaustive search with different software designs and they are compared with each other using Nsight experiment results. Outcome of these results are used for finding the best CUDA implementation and from it, AES-128, AES-192 and AES-256 versions are created for exhaustive search, on the fly CTR and file encryption. They are compared with CPU implementations in order to decide whether GPU or CPU is the fastest considering these topics. For this comparison, two different type of CPU implementations are created which are AES-NI, using new instruction set of Intel, and basic C++. 1, 2, 4 and 8 threads versions of these implementations are compared with CUDA and results are shared. According to them, CUDA is 21, 19 and 18 times faster than the best CPU implementations for exhaustive search with respect to key length. These ratios are 4 times for CTR implementations in which 37.52 GBs of data can be encrypted each second while using CUDA. File encryption for CUDA is 22, 19 and 17 times faster than the best CPU implementations. CUDA can encrypt 31.24 GBs of data per second in this regard without considering I/O operations.

Related to the applications for Cognitive Sciences PhD Program in 2019-2020 Academic Year Fall Term, 2^nd group interviews will be held on Tuesday, September 3, 2019.

Candidates whose names are listed below are expected to be ready in front of Informatics Classroom II-03 at 10:00 AM.

Lejla Hasandecic-Dapo

Aida Ben Halima

Related to the 2019-2020 Fall applications for Information Systems (MS/PhD) programs:

Interviews for MS and PhD in Information Systems will be held on August 29, 2019.

Note: Candidates who attended to interviews on June 27/28 don’t have obligation to attend the interview again.

Candidates listed below are expected to be present at II-02 and II-03.

Related to the 2019-2020 Fall applications for Medical Informatics (MS/PhD) and Bioinformatics (MS) programs:

Interviews for MS and PhD in Medical Informatics will be held on August 27, 2019.

Second group interviews for MS in Bioinformatics will be held on September 3, 2019.

Candidates listed below are expected to be present at II-06 (Informatics Conference Hall - 2) 15 minutes before of their scheduled time of interview.

Should any conflict arise between the Turkish language version of this page and its English translation hereof, the Turkish language version shall be controlling.

PhD. Candidate: Nur Didem Başkurt

Program: Information Systems

Date: 28.08.2019 10:00 a.m

Place: Conference Hall 01

Abstract: We aim to integrate hyperspectral cameras with catadioptric omnidirectional imaging systems to be able to benefit from the advantages of both. Hyperspectral imaging systems provide dense spectral information about the scene being investigated by collecting contiguous data from high number of bands on the electromagnetic spectrum. However the low spatial resolution of these sensors frequently bring about the mixing problem in remote sensing applications. Several unmixing approaches are developed in order to handle the challenging mixing problem on perspective images. On the other hand, omnidirectional imaging systems provide a 360-degree field of view in a single image, while they renounce high spatial resolution. Catadioptric images introduce a radial warping due to the structure of the mirror used in the system. This warping causes a non-uniformity in the spatial resolution which makes the unmixing problem more complicated. In this context, a novel spatial-contextual unmixing algorithm is developed specialized for the large field of view hyperspectral imaging systems. The proposed algorithms are evaluated on various real-world and simulated cases. Experimental results show that the proposed approach outperforms compared methods.

Applications to the graduate programs for the Fall semester will be made in two groups according to the changes made in the academic calendar.

The list of the candidates who have been accepted after the evaluations of all the applications completed between 29 April - 19 June 2019 will be announced on 3 July 2019 on our Institute’s web site. As a result of this evaluation only the accepted candidates lists will be announced. Those who are not in these lists will be evaluated in the second group.

Online application system will be re-opened for the second group between 2 - 19 August 2019. Between these dates, new applications will be accepted and the applications made in the first group could be updated, if needed. Final admission results for all applications will be announced on 9 September 2019.

The candidates who have been accepted in the first group should not make any changes in their applications in the second group. If these candidates change their applications after getting acceptance in the first group, they would invalidate their acceptance results and would require reevaluation in the second group.

Registration of students newly admitted to graduate programs will be held between 11 and 13 September 2019.

During the interview dates previously announced by our Institute, only the interviews of candidates who are evaluated in the first group will be carried out. The interviews of candidates who will be evaluated in the second group will be held between 27 August-5 September 2019. Detailed information on these interview dates, times and locations will be announced later.

Important dates are as follows: