Yüksek Lisans Tezleri
Permanent URI for this collectionhttps://hdl.handle.net/20.500.12416/15956
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Master Thesis Cloud computing impact on communication and service sector: Iraq case study(Çankaya Üniversitesi, 2018) Almafrchi, Sabah Salam HusseinRapid advancements in technology have enhanced the significance of the use of cloud technology. The deployment of cloud computing as effective technology integration has been successful, particularly across the developed states of the world. However, there have been certain behavioural issues regarding the cloud technology activation in certain developing regions, rather than the technical limitations. In the context, the current research aims to evaluate the impact of deployment of cloud computing on the communication and service sector of Iraq. Even though the cloud computing approach seems appealing, yet certain challenges of adverse extent are encountered across the states where internet penetration and technology acceptance is not considerable. Similar is the case with Iraq; hence, the researcher has targeted the communication and service sector of Iraq with respect to assessing the deployment of cloud computing. In this regard, the constructs of UTAUT model as identified dependent and independent variables of the study have been employed, in terms of conducting a multiple-item 5-point scale online survey across 251 IT experts of the targeted domain. Resultantly, it has been established that there have been certain challenges of disregarding cloud computing as an effective measure of enhancing productivity, and efficiency of the employees in a secure and feasible manner. Therefore, the study has recommended training and awareness programs that must present the credibility and integrity of cloud computing as an effective technological deployment. These programs assist accepting the cloud computing technology by the employees in the communication sector, which enables the employees, as well as the organizations, providing more efficient tasks by reducing the costs and efforts needed to perform the exact same tasks without the use of cloud computing technologies. This improvement also assists other employees and organization to accept that technology, which eventually leads to more and more acceptance to the cloud computing technology in the communication and service sector.Master Thesis Spectral analysis of ECG signals for pre-diagnosis of heart diseases(Çankaya Üniversitesi, 2018) Al-Jada, Omar Saad AbdulqaderIn this thesis we used the three cases for diagnosis of the heart attacks. The first case is healthy persons, second case is non healthy persons and the last one is unknown persons. For detection of them we used the correlation and auto correlation between the cases. For the simulation results we used the MATLAB programming languages. For diagnosis we used two statistical method. The first one is to take only one dice (assuming that this selected dice is a perfect representative of the remaining dice) and throw it many times (multiplying the time axis, to get time average). The second is to throw all dice or some of the dice at the same time (multiplying the event axis, to get ensemble average). The question is how many times should the experiment be repeated along time axis in the first case and how many dice thrown at a time in the second case so that we arrive at a result well approximated to the ones to get a result within 98 % confidence interval the minimum number that an experiment should be performedMaster Thesis Kamu kurumlarında risk değerlendirme rehberi(Çankaya Üniversitesi, 2018) Tok, Elif Gülce6331 Sayılı İş Sağlığı ve Güvenliği (İSG) Kanunu'nun 31.12.2012'de yürürlüğe girmesinden itibaren risk değerlendirmesi bütün işyerlerinde zorunlu hale gelmiştir. Bu çalışmada iş sağlığı ve güvenliğinin önemli bir öğesi olan risk değerlendirmesinin kamu kurumlarında yapılmasını daha sağlıklı hale getirecek ve kolaylaştıracak bir rehber hazırlanmıştır. Bu rehber bir kontrol listesi ve ilgili risk tablosundan oluşmaktadır. Gerek ülkemizdeki 6331 Sayılı İSG Kanununda ve ilgili yönetmeliklerde, gerekse de OHSAS 18001 İSG Yönetim Sisteminde, sürekli iyileştirmenin önemi açıkça görülmektedir. Bu çalışmada hazırlanan rehberin uygulanmasında riskin kabul edilebilir seviyeye inene kadar risk değerlendirmesini izlemeyi sistemli ve kolay hale getirerek sürekli iyileştirmenin gereklerini sağlamak üzere bir Karar Destek Sistemi önerilmiştir. Birim, kaynak ve tehlike parametreleri bir bütün olarak ele alınarak BKT olarak değerlendirilmiş ve sistemin veri tabanı altyapısı bunun üzerine kurulmuştur. Risk değerlendirmesinin ana öğeleri olan BKT, risk ve önlem ilişkilerinin Varlık-İlişki Çiziti hazırlanarak en büyük ve en küçük kardinallik oranları her ilişki arasında tanımlanmıştır. Fikir vermesi açısından bazı kullanıcı ara yüzleri tasarlanmış ve önerilmiştir. Farklı sektörlerde yapılmış benzer çalışmalar mevcuttur ancak gerek kamu kurumları düşünüldüğünde gerekse de uygulama için önerilen karar destek sistemi düşünüldüğünde bu çalışma tamamen özgün ve orijinaldir.Master Thesis Trafo merkezlerinde manyetik alan maruziyetleri üzerine bir inceleme(Çankaya Üniversitesi, 2018) Sağdıçoğlu, Umut ÇetinArtan enerji ihtiyacı ile sayıları gün geçtikte artan ve enerji iletim sisteminin kalbi olarak görülen trafo merkezlerinde görev yapan işletme teknisyenleri işleri gereği manyetik alana maruz kalmaktadırlar. Bu çalışmada, Türkiye'nin çeşitli bölgelerinde 31 farklı "154kV/34,5kV" trafo merkezinde manyetik alan ölçümü yapılarak çalışanların iş sağlığı ve güvenliği açısından maruziyetleri değerlendirilmiştir. Ölçümler düşük frekansta ölçüm yapan TENMARS TM-192D Üç Eksenli Manyetik Alan Ölçer cihazı ile çalışanların yaptıkları farklı görevler için bulundukları noktalarda yapılmıştır. Elde edilen sonuçlar ölçüm noktalarına göre kategorize edilmiş olup, ölçüm sırasında trafo merkezindeki anlık yük durumu da göz önüne alınarak trafo merkezleri arasında karşılaştırmalar yapılmıştır. Karşılaştırma sonuçları ile ulusal ve uluslararası düzenlemelerle belirlenen limit değerler ışığında trafo merkezi işletme teknisyenleri için yüksek maruziyet teşkil eden bölgeler tespit edilmiştir. Ölçümler sonucunda en yüksek maruziyet değerinin eski tip trafo merkezlerinin kapalı şalt hücre önlerinde olduğu görülmüş olup buradaki en büyük etkenin sistem ile personel arasındaki kısa mesafe olduğu tespit edilmiştir. Manyetik alan maruziyetinin azaltılması için, gelişen teknolojinin sağladığı imkanlar dahilinde işletme teknisyenlerinin tüm işlemleri uzaktan kontrol sistemleri ile kumanda odasından yapması faydalı olacaktır.Master Thesis Indoor positioning using wireless access signals(Çankaya Üniversitesi, 2018) Altınbaş, MerveIndoor positioning is one of the most popular topics searched in recent years, but it is not a precise and clear solution. This thesis study discusses different solutions for indoor positioning in abstract form and compares various methods. From these comparisons, Wi-Fi access points (APs) were determined to be the best method for indoor positioning. In the first phase, assuming that the locations of the APs are unknown, measurements are made at several points and information is taken, such as Wi-Fi AP signal level and mac-id. All information is saved into the database. With this information, the coordinates of the Wi-Fi APs are found using MATLAB programming language. The second phase finds the location of the person indoors using these coordinates. The aim of thesis is to achieve a position coordinate accuracy between 0 and 5 meters.Master Thesis Analysis and performance measurements of MIMO OFDM techniques for LTE(Çankaya Üniversitesi, 2018) İbişoğlu, İsmailNowadays, the demand towards mobile phones that require high data rates applications has rapidly increased. In mobile networks, the Third Generation Partnership Project (3GPP) to meet the increasing demand developed long-term evolution (LTE) standard. Today, on February 28th, 2017[1], 790 operators have commercially launched LTE in 201 countries, according to data released this week by GSA (Global mobile Suppliers Association) in its latest update of the Evolution to LTE report. This study has analyzed LTE network structure which is based 3GPP standards, Version 7, 8, 9, 10, 11 and 12, and defined LTE technology properties. Afterwards, information is offered about different methods for capacity and coverage area calculations. This study also tested whether Shannon Capacity Equality or using software (like ATOLL) tools are preferred by today operators on sample.Master Thesis A systematic review of gamification in the context of software development landscapes(Çankaya Üniversitesi, 2018) Olgun, SerhanThe software development process is a complex activity that has interrelating steps to produce software products. Human related social factors such as user motivation, engagement, communication and collaboration issues affect the activities performed by software development organizations. In fact, software engineering researchers seek better ways to overcome the human related issues so as to improve the quality in software development. Consequently, research has been conducted to introduce new methodologies, techniques and concepts. As such, gamification has been introduced as a novel technique to enhance the software development process and ultimately resolve some of the identified obstacles that are related to human factors. However, there is a bias to adopt the gamification into the software development process because there are still insufficient evidences about its positive outcomes. In this study, a systematic literature review was rigorously conducted to investigate the application and to reveal the benefits of gamification in the software development landscapes. This study contributes to the area of software engineering research by proposing a classification approach to categorize gamification studies in software development landscapes. The results of this research suggest that there has been a significant increase in empirical and theoretical studies that were recently published and many positive steps being taken towards better integration of gamification in software development organizations.Master Thesis Kalker ocaklarında ocak sularının ve delme-patlatma işlemlerinin iş sağlığı ve güvenliği üzerine etkilerinin araştırılması(Çankaya Üniversitesi, 2018) Aykal, Utku MeriçBu çalışma ile kalker sahalarında proses gereği tüm çalışmaların, güvenli sürdürülmesi için gereken proaktif yaklaşımlar incelenmiş, kalker rezervi kazanımı için gereken çalışmalar sırasında meydana gelebilecek risk unsurlarının nasıl en aza indirilebileceği araştırılmıştır. Gerekli saha çalışmaları yapılmış ve iş kazaları, "Mühendislik Metotlar Yöntemi" uygulamaları ile asgariye indirilmeye çalışılmış yani olası iş kazalarına kökten tedbir alınmaya çalışılmıştır.Master Thesis Detection of brain tumor in magnetic resonance images(Çankaya Üniversitesi, 2018) Bufares, Anwar A.Brain tumor is one of the serious diseases that have caused death to many people in recent years. The complex structure of the brain and its main function associated with the central nervous system and its main role in controlling most of the functions of the body makes detection of tumor a challenging task. Many techniques have been presented in the medical field in order to detect brain tumor from MRI images. In this thesis, a system is designed to detect the tumor in brain Magnetic Resonance Imaging (MRI) using a seed-based region growing algorithm (SBRG) in the segmentation process. Then after segmenting the region of interest (ROI) the texture features are extracted from the image and used to classify tumor and non-tumor tissues by the implementation of the Artificial Neural Network (ANN) classifier. The accuracy obtained by this system is 99.88%.Master Thesis PAPR reduction of OFDM system symbole via optimal rotation of information symbols(Çankaya Üniversitesi, 2018) Jassim, Alaa HusseinOrthogonal frequency division multiplexing (OFDM) is an effective multicarrier transmission for wireless communication systems. The demand for high data rate for multimedia applications made OFDM widely used in wireless communication. The main drawback of OFDM communication systems is their high peak-to-average power ratios (PAPRs) which limit their use in practical applications. There are two well-known PAPR reduction techniques known in the literature, partial transmit sequence (PTS), and selective mapping which are closely related to each other. In this thesis work, we propose a new PAPR reduction approach. Our method is based on rotation of the information symbols before inverse fast Fourier transform (IFFT) operation. The selection of the information symbols is performed inspecting their combinations in OFDM symbols, and this is achieved detailing decimation in frequency IFFT algorithm, i.e., inspecting the combination of information symbols while performing decimation in frequency IFFT algorithm. The proposed reduction method has better performance than that of the PTS method, and has much less complexity when compared to that of the PTS technique.