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2004 - 2023 İstanbul Büyükşehir Belediyesi ulaştırma yatırımlarının İstanbul’a etkileri : raylı sistemler, 4. Levent - Hacıosman örneği
(Bahçeşehir Üniversitesi Fen Bilimleri Enstitüsü, 2010) Topaloğlu, Hacı Mehmet; Gürsoy,Mustafa
4734 sayılı Kamu İhale Kanunu kapsamında doğrudan temin ile yapılacak alımlardaki uygulamaların analizi
(Bahçeşehir Üniversitesi Fen Bilimleri Enstitüsü, 2009) Atılbaz, Yıldıray; Bozbura, F. Tunç
5393 ve 6360 sayılı kanunların Avrupa yerel yönetimler özerklik şartı kapsamında değerlendirilmesi
(Bahçeşehir Üniversitesi Fen Bilimleri Enstitüsü, 2014-04) Gözüaçık, Halil; Turgut, Sırma
Özerklik, bir topluluğun veya bir kuruluşun ayrı bir yasaya bağlı olarak kendi kendini yönetmesidir. Yerel yönetimler açısından özerklik, anayasa ve kanunlarla belirlenmiş kamu hizmetlerinin bir kısmının vatandaş yararı düşünülerek, yerel yönetimlerin sorumluluğunda yerine getirilmesi yetkisidir. Yerel özerklik önemi nedeniyle başta Birleşmiş Milletler olmak üzere uluslar arası örgütlerin sürekli gündeminde olmuş, hazırlanan uluslar arası belgelerde özerklik birçok açıdan değerlendirilerek tüm dünyada uygulama birliği sağlanmaya çalışılmıştır. Bu konu Avrupa Konseyi tarafından da ele alınarak, bir taraftan Avrupa’nın ekonomik ve siyasal açıdan bütünleşmesini, diğer taraftan bölgesel ve yerel kimliklerin güçlenmesi sonucunda merkezi idarenin bazı yetkilerin yerel birimlere devredilebilmesi için 1985 yılında Avrupa Yerel Yönetimler Özerklik Şartı oluşturulmuştur. Türkiye, 1988 tarihinde Özerklik Şartı’nın bazı maddelerine çekince koyarak imzalamış olmasına rağmen, 1992 tarihinde yürürlüğe koyarak Türkiye’de yerel demokrasinin gelişmesi adına umut verici bir adım atılmaktadır. Son dönemde Türkiye, Avrupa Birliği mevzuatı çerçevesinde yerel yönetimlerin idari ve mali açıdan daha özerk bir yapıya kavuşturulması için birçok yasal düzenlemeler yapmıştır. Bu çalışmada; merkezden yönetim, yerel yönetim ve özerklik kavramlarına kapsamlı bir şekilde değinilmektedir. Ayrıca Özerklik Şartı’nın ortaya çıkış süreci, kapsamı, ilkeleri ve Türkiye’nin Şartı kabulü geniş şekilde ele alınmaktadır. Son olarak, yerel yönetimler hakkında ciddi düzenlemeler içeren 5393 ve 6360 sayılı Kanunların Özerklik Şartı kapsamında değerlendirilmesi yapılarak, yapılan düzenlemelerle yerel özerkliğin ne kadar gerçekleştirilebildiği ortaya konulmaya çalışılmıştır.
A cloud-based application design and development for in-memory data grids
(Bahçeşehir Üniversitesi Fen Bilimleri Enstitüsü, 2013-06) Şimşek, Murat Yıldırım; Güngör, V. Çağrı
Cloud computing is defined as the use of computing resources (hardware, software, storage) over a network. It is a service that combines hardware, storage and interface (software) and is supplied for an end-user over the internet. With the help of this infrastructure that consists of strong components, end-users can easily realize the relevant operations on the internet. In this respect, cloud computing can be viewed as the next step for the internet development. Internet and web technologies change and develop rapidly with each passing day. Also, the demands of end-users increase at the same velocity as these advances. End-users want to do their operations in a fast, reliable and consistent web environment. The establishment of such a web environment is impossible without technological infrastructure. For this reason, many big companies invest on large service infrastructures in order to meet the demands of end-users. In addition, it is required to make changes in the infrastructure because of the constantly increasing number of endusers. The establishment of an infrastructure that develops in accordance with the number of its users and meets all demands of end-users creates difficulties in terms of both cost and management. However, cloud computing with Oracle Coherence provides low-cost solutions because it is flexible, scalable and high performance. In this study, three cloud-based applications that combine SaaS and PaaS models were developed by using Oracle Weblogic Server, Oracle Coherence and Hazelcast. With the help of the cloud-based architecture and applications, it was demonstrated that websites can work faster, more reliably and consistently. Performance results indicated that Oracle Coherence applications, are superior over the traditional database and the other in-memory data grid, Hazelcast, in terms of the response time, cpu use and memory usage.
A framework for developing online multiple kinect interactions
(Bahçeşehir Üniversitesi Fen Bilimleri Enstitüsü, 2013-12) Akkoyun, Muhammed Emre; Öztürk, Övgü
This study deals with the Microsoft kinect camera data streaming over internet. Accessing a kinect camera over internet is so popular nowadays. Many developer and research company are working on this hot topic and find several solutions. Most of this applications have some avantages and disadvantages. The main disadvantage of this applications is consuming network bandwidth heavily when transferring kinect data over internet. Because transferring whole of kinect data binds heavily mass of data to the network, so the developers of kinect applications should consider about this topic and should mine and comb out the unnecessary kinect data. This applications also directly access the kinect device from javascript and this approach only works for local applications and not support multiple kinecting display on one browser. There is no best case solutions for this kind of problems. In this study solutions have been found for this problems and disadvantages. Briefly ; for network bandwidth problems kinect data has been mined and unnnecesarry kinect data combed out and the necessary data converted in json format before streaming over network, and for multiple kinect support; application divided into two parts which are server side application and client side application and with the help of this approach some performance problems cleared and network bandwith problem also cleared before network streaming and also with this approach more than one kinect cameras data could streamed over network and displayed on a single web page. On the other hand; with the approach which is used at this study can be implemented for other depth streaming devices with just making modifications on server side application.
A fuzzy multi-attribute decision making model proposal to select clinical chief of surgery
(Bahçeşehir Üniversitesi Fen Bilimleri Enstitüsü, 2012-06) Aksu, İpek Nur; Beşkese, Ahmet
Günümüzde her firma, bireysel ve kurumsal verimliliği ve etkinliği arttırmayı amaçlayan çalışmalarda bulunmaktadır, şirketlerin sektörel anlamda başarılı olabilmeleri için geçerli ve uygulanabilir bir performans yönetim sisteminin kurulmasını ve işletilmesini sağlamaları gerekmektedir. Rekabet koşullarının giderek arttığı bu dönemde, şirketlerin personel performanslarının değerlendirilmesi geçmişe yönelik performans seviyesini gösterirken, geleceğe yönelik potansiyel performansı belirlemede ve performans arttırma çalışmalarında yeni bir bakış açısı sağlamaktadır. Bu çalışmanın amacı sağlık personelinin özellikle cerrahların işe alım kriterlerini belirlemektir. Çalışma, ilgili iş için 3 adayı ve yıllardır sağlık sektöründe kariyer sahibi olan 2 uzman ile gerçekleştirilmiştir. Bu çalışmada, kar amacı gözetmeyen kuruluşlarda personel performans değerlendirme sistemi, performans değerlendirme kriterlerinin belirlenmesi ve bu kriterlerin kurum açısından önem derecelerinin belirlenmesi için ağırlıklandırılması yer almaktadır. Çalışma iki bölümden oluşmaktadır, birinci bölüm İstanbul’da özel hastanelerde çalışan uzmanlardan alınan bazı bilgilerle işe alım kriterlerinin belirlenmesi ve sonrasında bütün bilgilerin bir araya getirilip işe alım kriterlerinin hiyerarşik yapısını olusturmaktır. Bulanık ortamda, kriterler Analitik Hiyerarşik Süreç ile sıralanmış ve önem dereceleri belirlenmiştir. İkinci bölüm ise pozisyon için uygun adayın TOPSIS methodu ile seçilmesidir. Sonuç olarak, işe alım kriterleri, işe alım sürecini değerlendirme çeşitli methodlar kullanılarak belirlenmiştir. Bu veriler kullanılırak uygun adaya karar verilmiştir.
A Hardware implementation of true-motion estimation with 3-D recursive search block matching algorithm
(Institute of Science, 2008) Dedeoğlu, Soner
A Hardware implementation of true-motion estimation with 3-D recursive search block matching algorithm
(Bahcesehir University Institute of Science, 2008) Dedeoğlu, Soner; Uğurdağ, Hasan Fatih
Motion estimation, in video processing, is a technique for describing a frame in terms of translated blocks of another reference frame. This technique increases the ratio of video compression by the efficient use of redundancy information between frames. The Block Matching based motion estimation methods, based on dividing frames into blocks and calculating a motion vector for each block, are accepted as motion estimation standards in video encoding systems by international enterprises, such as MPEG, ATSC, DVB and ITU. In this thesis study, a hardware implementation of 3-D Recursive Search Block Matching Algorithm for the motion estimation levels, global and local motion estimations, is presented.
A method for managing the risk : a hybrid approach to FMEA
(Bahçeşehir Üniversitesi Fen Bilimleri Enstitüsü, 2014-06) Pastırmacı, Ali Kaan; Beşkese, Ahmet
In today’s competitive business world, companies from all sectors are aiming maximum profit with minimum effort. In order to accomplish this goal, companies can ignore or do not give importance to the potential failures that may give devastating harm to their reputation. These potential failure modes do not only endangering the health/safety of workers and their working conditions but also the reputation of the company. Therefore, companies should also take precautions for potential failure mode to fulfill the obligations of occupational health and safety (OHS) and maintain the reputation of the company. OHS concept requires a detailed and renewable risk analysis methodology. A risk analysis methodology that is used for eliminating the risk related to OHS concept should be simple, straightforward and easy to apply. Indeed, a vast majority of these failure modes can be prevented in advance. A risk analysis methodology which is suitable to the characteristic of the company may help. Risk analysis should be applied by experienced and knowledgeable analysts. In this thesis, one of the most widely used risk analysis methodologies, Failure Mode and Effect Analysis, is proposed. Failure mode and effects analysis is a widely used engineering technique for designing, identifying and eliminating known and/or potential failures, problems, errors and so on from system, design, process, and/or service before they reach the costumer (Schneider & Stamatis 1996). Unfortunately, traditional FMEA methodology has several shortcomings. This work has been planned to eliminate these shortcomings with the help of Fuzzy Analytical Hierarchy Process (Fuzzy AHP) and Grey Relational Analysis (GRA). Fuzzy AHP method is used to determine the importance weights for Decision Makers (DMs) and to calculate the criteria weights of decision factors both for First Risk Priority Number (RPN1) and Second Risk Priority Number (RPN2). RPN1 is calculated by using decision factors, occurrence, severity and detectability (O, S and D) with the help of GRA methodology. According to RPN1 values, FMEA team prioritizes the failure modes and determines the proper corrective actions. The team also determines the threshold intervals for corrective actions to make the work more realistic. Then, RPN2 is calculated by means of five additional decision factors (criteria). Criteria consider the cost, time, regulatory obligations, prevention policy of company, and reputation of company. Thanks to RPN2, a contribution to the literature is made. After that, RPN3 is obtained from the summation of RPN1 and RPN2 that are multiplied with their corresponding coefficients. Finally, FMEA team reprioritizes the corrective actions according to RPN3 values and the corrective actions are performed according to this prioritization. To demonstrate the effectiveness of the proposed methodology, a case study is applied in a yarn manufacturing company from Turkey.
A Novel generelized matual information approach and ıts use ın feature selection
(Institute of Science, 2008) Şakar, Cem Okan
A novel recommender engine
(Bahçeşehir Üniversitesi Fen Bilimleri Enstitüsü, 2014-04) Tüfek, Alper; Mimaroğlu, Selim Necdet
Recommender systems are software tools and techniques that help users to find products/items which are of interest, from large catalogs. Available options extremely differ both in number and attributes depending on the domain, that is, the type of object/item needed to be selected. Recommender systems can be classified broadly into three categories: content-based, collaborative filtering based and hybrid systems. Content-based systems generate recommendations based on descriptions or content of items. The user will be recommended items similar to the ones the user preferred in the past. The biggest limitation of content-based techniques is that extracting features associated with items to be recommended is usually a costly process. The content must either be in a form that can be parsed automatically (e.g., text) or the features should be assigned to items manually. Collaborative filtering is the most popular technique for recommender systems. Recommender systems of this group simulate taking recommendations from friends with similar tastes. In this thesis, a novel recommender system based on collaborative filtering is designed which can be easily applied to many different domains. The main advantage of the new system is its ability to use both implicit and explicit information which considerably increases recommendation coverage. Also an asymmetric approach is proposed for similarity calculations during nearest neighbor selection procedure. Another objective that is aimed to observe is to be better at differentiating especially liked items from disliked ones. In this respect, a penalization scheme is incorporated to lower down the scores for items with low ratings whereas highlighting items with high ratings.
A Password based key establishment protocol with symmetric key cryptography
(Bahcesehir University Institute of Science, 2008) Gökçeli, Recep; Anarım, Emin
In 2005, Laih, Ding and Huang proposed a password-based key establishment protocol such that a user and a server can authenticate each other and generate a strong session key by their shared weak password within a symmetric cipher in an insecure channel. In this protocol, a special function, which is a combination of a picture function and a distortion function, is combined to authenticate the user and protect the password from the dictionary attacks that are major threats for most of the weak password-based protocols. They claim that the proposed protocol is secure against some well known attacks. However, Tang and Mitchell show that the protocol suffers from an offline dictionary attack requiring a machine based search of size 223 which takes only about 2.3 hours. So designing such a protocol with providing practical security against offline attack is still an open problem. In this study, a password-based authenticated key establishment protocol is proposed that provides practical security against offline dictionary attacks by only using symmetric cryptography.
A Password based key establishment protocol with symmetric key cryptography
(Institute of Science, 2008) Gökçeli, Recep
A polynomial modeling based algorithm in Top-N recommendation
(Bahçeşehir University Graduate School of Natural and Applied Sciences, 2018) Yücel Kasap, Özge; Tunga, M. Alper
A re-acted audio-visual affective Turkish database
(Bahçeşehir Üniversitesi Fen Bilimleri Enstitüsü, 2014-03) Önder, Onur; Eroğlu Erdem, Çiğdem
Scientific research on emotion recognition have gained great interest from researchers in the past decade due to its importance in human-computer interraction and artificial intelligence. Extensive affective databases are needed to test the emotion recognition algorithms. Most of the existing databases available to researchers are collections of acted data. However, naturalistic and spontaneous data is needed for developing affect recognition algorithms which will work under realistic conditions. In this thesis, we recorded and annotated a spontaneous audio-visual face database consisting of expressions of emotions as well as mental states. The targeted emotions are happiness, sadness, anger, disgust, fear, surprise, contempt and boredom. The targeted mental states are interest (including curiosity), unsure (including confusion and undecidedness), bothered (including complaint), thoughfulness and concentration. The database is named as BAUM-1: Bahçeşehir University Multimodal Affective Face Database of Spontaneous Affective and Mental States. BAUM-1 has been collected from 31 subjects and it contains video clips recorded from two different angles (frontal stereo and half profile mono). The database contains about 25 hours of video and audio data. The database is being shared by researchers via a web site and we hope it will be a valuable resource for researchers working on audio and/or visual affect recognition.
A study on self-help incremental housing : Lattakia case
(Bahçeşehir Üniversitesi Fen Bilimleri Enstitüsü, 2018) Rai, Noor; Soygeniş, Sema Esen
Informal settlement has been one of the major topics to discuss in the current time, and it is one of the most serious issue governments and societies face nowadays. Rapid population growth in developing countries forced households to use informal mechanisms to access housing, such as acquiring land in illegal sub-divisions or squatting on public land and incrementally building their dwellings. The study argues the potentials of government intervention for housing the poor, thru analysis of the Corniche Region phases of development similar to self-help incremental housing. The study deduces the best recommendations for finding possible solutions for incremental housing process. In brief, this thesis attempts to identify the main determinants and triggers of incremental housing process and the outcome of the Corniche Region case study where it is incrementally built but there is not much governmental intervention. These triggers might aid in explaining the challenges and potentials of the development of the process. Then, some recommendations, based on questioning the potentials of self-help incremental housing in various geographies, will be the starting points for an improved planning and management.
A video surveillance system for detection of potentially dangerous events in underground railway stations
(Bahçeşehir Üniversitesi Fen Bilimleri Enstitüsü, 2013-04) Dağlı, Mehmet Ali; Eroğlu Erdem, Çiğdem
Due to the excess number of security cameras in metro stations, security personnel cannot simultaneously monitor all of the cameras effectively. Therefore, they might miss some of the potentially dangerous events that require timely action. In this thesis, a video surveillance system, which automatically detects several potentially dangerous events, and generates warning messages for the security personnel is presented. The potentially dangerous events that are handled in this thesis consist of: safety line intrusion, proximity warning, fallen object detection, prohibited zone violation and open prohibited zone entry detection. Intrusion of the safety line along the tracks or an accidental fall on the tracks can cause lethal events if necessary precautions are not taken on time. Before the detection of the potentially dangerous events, it is important to detect the moving objects in the scene. For this purpose several state-of-the-art background estimation methods have been implemented and compared. Then moving objects are detected based on the estimated background. Another event that is informative is the state of the train, which can be either approaching, stopping, or leaving the station. For example, if the train has stopped, then detection of safety line intrusion is irrelevant, since passengers will be getting on and off the train. The layout of the cameras at the pilot station has an active role in the development of the algorithms. Video streams from four cameras in the station, which have different field of views have been used for different purposes. For example, the camera used for the detection of the prohibited zone violation is different from the camera that is used for detection of the safety line intrusion. The developed system has been tested on video data obtained from a pilot station in stanbul, where no such automatic video analysis system is currently being used. The experimental results are quite promising, and they have been verified by security personnel. The system can operate real-time and can be adjusted via a graphical user interface.
A web-based audit platform for internal audit departments of banks
(Bahçeşehir Üniversitesi Fen Bilimleri Enstitüsü, 2014-01) Doğan, Betül; Baktır, Selçuk
The emergence of modern technology resulted in the broad usage of information systems in many business areas because of its advantages. The usage of web-based applications in almost every business area has increased with the availability of practical and quick solutions offered by information systems and the widespread use of the Internet. In this way, it became possible provide services to anybody at any time of a day in a costless and effortless way. In conjunction with these developments, the auditing profession is constantly improving by renewing itself. Besides, using the advantages of information systems promote a broad range of value-added internal auditing. However, when we look at the previous researches, we see that information systems in auditing are used generally to facilitate and assist the audit activity in specific areas. The purpose of this thesis is to develop a web-based audit platform (W-BAP) which can be used by auditors to perform control activities periodically. With our software, an auditor can generate an annual work plan, can save audit evidences as an attachment to working papers and share their findings with related departments. Thus the auditor will be able to operate a complete audit from beginning to end with this software. Using this software, it is possible for audit department of a bank to be compatible with the International Internal Audit Standards which is issued by The Institute of Internal Auditors (IIA). In the end, we test W-BAP using according to Technology Acceptance Model (TAM) for ease of use and usability.
AB yerel özerklik şartnamesi bağlamında Diyarbakır Büyükşehir Belediyesi katılımcılık modeli
(Bahçeşehir Üniversitesi Fen Bilimleri Enstitüsü, 2013-06) Odabaşı, Cumali; Kurtuluş, Hatice
Ülkemizde katılım kavramı 70’li yıllarla birlikte daha çok tartışılmaya başlanmıştır. Özellikle 90’lı yıllarla birlikte bu kavramın hem özel sektörde, hem sivil toplum örgütlerinde hem de kamuda tartışılmaktan öteye popüler hale gelmiştir. Farklı siyasal kimliklere sahip politik hareketlerin tümünün programında yer alan bu kavram öne çıkmaya başlamıştır. Özel sektör tarafından endüstriyel demokrasi gibi kavramlar kullanılsa da katılım kavramının daha çok verimlilik, performans artırma, değişen çevre koşullarına uygun dönüşümleri yapma çerçevesinde ele alındığı görülmektedir. Sivil toplum örgütlerinin hem gelişmelerini sağlayan ideolojik arka plan kavramlardan dolayı hem de üretim güçlerini, etkinliklerini geliştirmek için katılım kavramına ayrı bir önem verdikleri görülmektedir. Son yıllarda yapılan demokratikleşme, temsili demokrasiden doğrudan demokrasiye, katılımcı demokrasiye geçiş tartışmaları, devletlerin yaşadıkları meşruiyet krizi, küreselleşmenin yarattığı yeni dinamikler katılım kavramını kent yönetimleri bağlamında da daha popüler hale getirmiştir. Bu çalışma ile Avrupa Birliği Yerel Özerklik şartnamesi bağlamında Diyarbakır Büyükşehir Belediyesi için bir katılımcılık modeli geliştirilmeye çalışılmıştır. Çalışmada öncelikle yerel özerklik tartışmalarından ve AB Yerel Özerklik Şartı’ndan bahsedilmiş, ardından, yerel yönetimler ve demokratik katılım olgusu incelenmiş ve son olarak da Diyarbakır Büyükşehir Belediyesi’nin katılımcı belediyecilik uygulamaları ele alınmıştır.
Adana İlindeki toplu taşıma sistemlerinin altyapısının tespiti ve iyileştirme önerileri
(Bahçeşehir Üniversitesi Fen Bilimleri Enstitüsü, 2013-01) Çetinkaya, Neslihan Emine; Ergün, Murat
Günümüzde ulaşım altyapısı, özellikle insanların kentsel alanlara ulaşımı, hareketliliği ve toplumların ekonomik gelişimi için yaşamsal bir önemdedir. Toplu taşıma sistemleri ise bu ulaşım altyapısının en önemli unsurlarından biridir. Kentlerin gelişimiyle birlikte artan ulaşım sorunlarının çözümü her geçen gün daha da karmaşık hale gelmektedir. Farklı ulaşım türleri ile çeşitlenen kent içi ulaşım sistemlerinde, bir yolculuk sırasında kullanılacak ulaşım türlerinin olumlu özelliklerinin birleştirilmesi ve olumsuz özelliklerinin azaltılması için bu ulaşım türlerinin birbirleri ile bütünleşmesi gerekmektedir. Kullanıcı odaklı, hızlı ve ekonomik bir toplu taşıma sisteminin geliştirilmesi, kent içi ulaşım sorunlarının çözülmesi için son derece önemlidir. Bu çalışmada, Adana’da yaşanan ulaşım sorunları üzerine bir değerlendirme yapılmıştır. Bu kapsamda, Adana’nın mevcut durumunu niteleyen veriler derlenerek, toplu taşıma sisteminin verimliliğini arttırabilmek adına çözümler üretilmeye çalışılmıştır.