Research News

M.S. Thesis
Müge Değirmenci Camcı, Synthesis of Realistic 3D Artifacts Using Flow Fields

There is a high demand for realistic computer aided imagery by many applicatiion areas such as games and movies. Due to the complicated characteristics of certain natural phenomena such as fire, smoke or mist, it is difficult to realistically mimic these effects. There are various approximation methods to visually synthesize lifelike 3D artifacts. The use of flow fields to guide the motion of particles creates a random but natural-looking effect. The aim of this study is to use flow fields to generate realistic 3D visual effects.

Date: 06.09.2019 / 11:00 Place: A-212

Müge Değirmenci Camcı, Synthesis of Realistic 3D Artifacts Using Flow FieldsMüge Değirmenci Camcı, Synthesis of Realistic 3D Artifacts Using Flow Fields

M.S. Thesis
Selahattin Polat, Performance Evaluation of Lightweight Cryptographic Algorithms for Internet of Things Security

In this thesis, we investigated the suitability and adaptability of the lightweight cryptographic algorithms on IoT devices, and compare their implementations with those of standard algorithms. We realized our implementations on the Arduino Uno platform, which is widely used in several embedded applications and preferred as a target development platform for its low price-performance ratio. We mainly focused on block ciphers and hash functions, which are the fundamental components of many cryptographic protocols. Among these protocols, Internet Protocol Security (IPSec) suite and DTLS are perhaps from the most well-known and commonly used ones. With our study, we plan to provide results that may be guidelines for existing and future lightweight implementations of IPSec, DTLS and other security protocols on IoT devices.

Date: 26.07.2019 / 13:00 Place: A-212

M.S. Thesis
Elif Bozlak, De Novo Snp Calling and Demographic Inference Using Trio Genome Data

In this thesis, we aim to analyze NGS data of three different domestic horse families to detect de novo mutations that occur within one generation. We found a higher number of true positives in highly covered data, while a lower number of true positives in the low covered data, showing the importance of sequencing coverage to detect true de novo mutations. In addition, to make estimations on the demographic history of the families we made PSMC and ROH analysis. Results of these analyses were coherent with previous studies. All in all, we had an idea for the minimum coverage threshold and quality of whole-genome sequencing data, to determine de novo mutations and to estimate population demography.

Date: 29.07.2019 / 11:00 Place: A-212

M.S. Thesis
Evrim Fer, Testing Natural Selection on Polygenic Trait-Associated Alleles in Anatolia Using Neolithic and Present-Day Human Genomes

Neolithic transition which has started approximately 10,000 year ago in west Eurasia and created a major shifts in human life. In many studies, strong selection signals on the genes related to changes in life-style were determined. With the advent of archeogenomics studies, those adaptations have also been supported using ancient DNA. Here, polygenic adaptations in Anatolia were investigated by comparing Neolithic (n=36) and modern-day (n=16) genome sequences for 40 polygenic traits potentially associated with diet, immunity and other related complex traits using pairwise FST and population branch statistics (PBS) method which provides a genome-wide selection analysis including a distant population.

Date: 29.07.2019 Place: A-212

Ph.D. Thesis
Mine Cüneyitoğlu Özkul, Single-Image Bayesian Restoration And Multi-Image Super-Resolution Restoration For B-Mode Ultrasound Images Using an Accurate System Model

Medical ultrasound provides various diagnostic advantages. If the image quality is improved, it will be beneficial for clinical usage.  In this thesis, the aim is to improve image quality and reduce speckle in B-mode ultrasound images. Both single and multi-frame, in-plane, freehand, 2D scan data was used for this purpose. Non-rigid registration, Bayesian restoration and super-resolution methods, along with a detailed study on statistical modelling of the speckle was employed. The results were compared to widely accepted image filtering methods. In terms of objective evaluation metrics and in image quality assesment on radiology experts, the proposed  methods performed better.

Date: 24.07.2019 Place: Conference Hall 1

Mine Cüneyitoğlu Özkul