Tezler

Bu topluluk için Kalıcı Uri

http://hdl.handle.net/11527/3

Gözat

Sustainable Development Goal "Goal 9: Industry, Innovation and Infrastructure" ile Tezler'a göz atma
  • Öge
    19. yüzyıl İstanbul'unda tarihî camilerin ihyası, örnekler ve arşiv belgeleri üzerinden bir tespit ve araştırma
    (Lisansüstü Eğitim Enstitüsü, 2022-02-25) Çiçek Ünal, Özlem ; Mazlum, Deniz ; 502082207 ; Restorasyon ; Restoration
    19. yüzyılda İstanbul'da çok sayıda tarihî cami ve mescit; yaşanan yangınlar, 1894 depremi, bakımsızlık ve imar faaliyetleri gibi nedenlerle kullanılamaz duruma gelmiş ve yeniden inşa/ ihya edilmiştir. O dönemde imparatorluğun Batı ile gelişen ilişkileri, değişen mimari beğeniler, yaşanan maddi sorunlar ve İstanbul'da yaşanan değişim ve dönüşümler yeniden inşa faaliyetlerinin ölçek ve niteliğini etkilemiştir. İstanbul'un artan nüfusu ile orantılı fiziki büyümesi imar hareketlerini beraberinde getirmiş; yeni ulaşım ağları, rıhtımlar, meydanlar gibi düzenlemeler hız kazanmıştır. Üst üste yaşanan yangınlar, pek çok kayba neden olmanın yanında, sonrasında getirilen yeni düzenlemelerle Batılı bir kent görünümüne kavuşmak için fırsat sunmuştur. Yangınlar ve 1894 depremi sonrası pek çok yapının aynı anda hasar görmesi, gerekli onarımların ve inşaatların yapılabilmesi için kaynak bulunmasını güçleştirmiş ve kimi durumlarda yapıların ayakta tutulabilmesi için gerekli olan müdahaleler gecikmiştir. Osmanlı arşivinde bulunan; yangınlar sonrasında hasarlı yapılar ve bağlı bulundukları vakıfların maddi durumları hakkında hazırlanmış defterler yaşanan sorunları ortaya koymaktadır. Vakıf yapısı olan tarihî cami ve mescitler, vakıfların yönetimindeki bozulma ve suistimaller neticesinde düzenli bakım ve onarımları için gereken ödeneklerden mahrum kalmış; yangın ve deprem gibi ani hasarların yanında kimi zaman geçen zaman içinde gelişen hasarların onarım bedellerini de karşılayamayacak duruma gelmiştir. Bu durumun önüne geçebilmek için vakıf yönetimleri ve bütçelerini tek bir çatı altına toplamak için idari adımlar atılsa da yaşanan maddi sorunların önüne geçmek kolay olmamıştır. Sonuç olarak kentteki tarihî cami ve mescitler hem bağlı oldukları vakıfların sorunları hem de içinde bulundukları kentte yaşanan afetler ve değişimler neticesinde ayakta tutulamayarak ihya edilmişlerdir. Tez kapsamında yapılan ve selâtin camilerini kapsam dışında bırakan araştırma, 1780-1920 zaman aralığında İstanbul'da 153 cami ve mescidin çeşitli nedenlerle kısmi ya da bütüncül olarak yeniden inşa edildiğini ortaya koymuştur. Gerçekleşen bu ihyalarda yapıların tarihî kimlikleri değil vakıf kimlikleri önde tutulmuştur. Genel olarak ihyalarda amaçlanan hedef vakfedilen işlevi uzun süre yerine getirebilecek sağlam bir yapı elde etmektir. 19. yüzyılda Batı'da gelişen anıt eser ve koruma kavramları Osmanlı'da gecikmeli olarak yüzyılın sonları ve 20. yüzyılın başlarında tartışılmaya başlanmıştır. Batının etkisiyle antik eserler üzerinde oluşan ilk ilgi zaman içinde daha geç dönem eserlerine kaymıştır. Çoğu vakıf yapısı olan, anıt niteliğindeki eski eserlerin onarımları yaşanan afetler nedeniyle 19. yüzyılda da gerçekleştirilmiş; önemli eserlerin uygulamalarında dönemin genel pratiklerine uygun olarak yabancı ya da yurt dışında eğitim almış mimarlar ağırlıklı olarak görevlendirilmiştir. Yapılan yasal düzenlemelerle onarımların uzman kişilerce ve denetim altında yapılması sağlanmaya çalışılmıştır. Osmanlı arşiv belgeleri; gerçekleştirilen ihyaların nedenleri, ihya kararının alınması, yapıları ihya ettiren kurum ve kişiler, ihya bedellerinin belirlenmesi ve karşılanması, ihya uygulamalarında izlenen süreç ve ihyalarda kullanılan yeni mimari üsluplar konusunda bilgi vermektedir. Yapıların ihyasında yukarıda sıralanan konular her yapının kendi koşulları ve hasar durumu özelinde değişebilmektedir. Yapılar kimi zaman kısmen ayakta tutularak, kullanılabilir durumdaki mevcut malzemesi ile ihya edilirken kimi zaman ise ihya edilecek yapı tamamen ortadan kalktığı için yeni baştan bir yapı inşa edilmektedir. Yapıların ihyasında bunun gibi değişkenlik gösteren durumları ortaya koyan örnekler tez çalışması içinde detaylı olarak aktarılmıştır. Kelime olarak "yeniden canlandırma" ve "diriltme" anlamına gelen "ihya" koruma biliminde rekonstrüksiyon (yeniden yapım) eylemine karşılık gelmektedir. 19. yüzyılda gerçekleştirilen ihyaların amacı yapıyı yaşatmaktan çok vakfedilen işlevi ve vakfedenin adını yaşatmaktır. Bu nedenle yapı tamamen değişse bile adı ve işlevi değişmemektedir. Cami ve mescitlerin, kendi arsalarında yeniden inşa edilmiş olmaları nedeniyle, konumları sabit kalmakta böylece kent tarihinde değişmeyen noktalar olarak günümüze ulaşmaktadırlar. Her ne kadar ihyalarda zamanın ihtiyaç ve yönelimlerine göre; üslup, malzeme, teknik ve ek işlevler değişebilse de yapının adı, işlevi ve konumu korunarak vakıf hizmeti yeniden canlandırılmakta ve devam ettirilmektedir. Rekonstrüksiyon koruma alanında tartışılmaya başlandığı günden itibaren belli sınırlar ve kurallar koyulmaya çalışılan bir uygulamadır. Çoğu zaman maksadını aşan bu uygulama; özellikle ani eser kayıplarına neden olan savaş ve afet gibi durumlarda, toplumun hafızasının devam edebilmesine ve iyileşmesine yönelik olarak başvurulabilir bir uygulama olarak tanımlanmakta ve sınırlandırılmaya çalışılmaktadır. Günümüzde koruma için neredeyse bir problem haline gelen rekonstrüksiyon; toplumsal iyileşme ve kültürel devamlılık gibi nedenlerin dışında; eski eser-turizm ilişkisinin getirdiği ekonomik kazanç, yapılaşma kısıtlaması olan tarihî yerleşimlerde inşaat yapma fırsatı ve simge yapıların hizmet edeceği politik çıkarlar gibi motivasyonlarla uygulanabilmekte, hatta kültür varlıklarının kaybını telafi edebilen bir müdahale olarak değerlendirilmektedir. Bu tezin, günümüzde moda bir tabir ve uygulama olan "ihya"nın koruma tarihimizdeki gerçek yerini anlamaya katkıda bulunması ve incelediği örneklere yapılacak olası müdahalelere ışık tutması umulmaktadır.
  • Öge
    4x4 askeri araçlar için bütünleşik klima tasarımı
    (Lisansüstü Eğitim Enstitüsü, 2022-06-16) Zengin, Barbaros Bahadır ; Böke, Yakup Erhan ; 503181102 ; Isı-Akışkan
    Bu tez çalışmasında, 4x4 tekerlekli MRAP sınıfı araçlar için klima sistemi tasarımı konusu ele alınmıştır. Bu tip askeri araçlarda, mürettebatın zamanının önemli bir kısmını araç içerisinde geçirdiğinden, araç içi termal konfor şartlarının, mürettebatın hareket kabiliyeti ve araç içi ekipmanların üzerinde önemli etkisi olduğundan dolayı, iklimlendirme sistemi, askeri araçlardaki önemli sistemlerden biri olarak öne çıkmıştır. Bununla birlikte, klima sisteminin oluşturduğu hacmin, hem mürettebat hareket alanı hem de diğer ekipmanların konumlandırılması açısından önem arz ettiği belirtilmiştir. Otomotiv klima sistemlerinin genellikle, ısıtma ve soğutma sistemi olarak iki ayrı sistemden oluştuğuna değinilmiştir. Bu iki sistemin aracın içersinde önemli bir hacim işgal ettiği anlaşılmıştır. 4x4 askeri araç içerisinde soğutma ve ısıtma sistemini, iki ayrı sistem olarak kullanmak yerine bütünleşik tek bir sistem olarak kullanmanın önemli bir hacim kazanımı sağlayacağı belirtilmiştir.
  • Öge
    A hardware based gunshot sound detection system
    (Institute of Science and Technology, 2020) Akçocuk, Mustafa Koray ; Güneş, Ece Olcay ; 637005 ; Elektronik ve Haberleşme Mühendisliği Anabilim Dalı
    With the development of semiconductor technology, embedded systems' capacity of operations also increases day by day. In this way, small-sized devices are able to perform complex works. As a result, people take advantage of embedded systems in a wide variety of areas to enhance the life quality of living. As a result of technological developments, the use of tools that assist law enforcement officers in crime detection is also increasing. Available gunshot detection systems mainly focuses on preventing illegal hunting, decreasing crime rates in public space, and detecting gunshot direction in battlefield areas. When the literature is examined, it is seen that machine learning methods are used in the studies used in gunshot sound detection. However, the number of hardware-based systems used in gunshot sound detection is quite a few and mostly simple methods such as cross-correlation threshold, edge detection are implemented. In this work, it is aimed to realize a gunshot sound detection system on hardware. In this context, it is aimed to select the system that uses the advantages of machine learning methods and is the most suitable for implementation on the hardware. When the literature is examined, it has been observed that the mel coefficients, signal energy and zero crossing properties perform well in determining the gunshot sound. For this reason, the mentioned features were obtained from the audio signal and used in k-nearest neighbors (k-NN) and support vector machines (SVM) classification algorithms. An accuracy rate of 96.1538% was obtained with the k-NN classifier and 91.3462% with the SVM classifier.
  • Öge
    A new approach in studying the engineering behavior and mechanical properties of artificial bonded soils in the laboratory
    (Graduate School, 2022-01-31) Ricardo, Richard Vall Ngangu ; Lav, Musaffa Ayşen ; 501142303 ; Soils Mechanics and Geotechnical Engineering
    The construction of structures on structured soils or the exploitation of such materials for construction purposes, such as in road pavement projects, has gained more importance with time. In some parts of the world, their study has become a necessity. Such soils, like residual soils, are widely encountered in tropical and subtropical regions. Even though their names may vary according to local culture or their morphology, they have all in common the bond structures. This property is a key parameter of those soils. However, to better study their behavior, the use of the artificial bonded sample in the laboratory has been adopted, offering an effective simulation. In the present study, the behavior of residual soil-like has been investigated under undrained conditions in triaxial equipment by using a large number of artificial samples made in the laboratory. The artificial bonded and unbonded samples were made from a mixture of sand, kaolin, and water. A thermal process was applied for the bonded specimens, whereas the unbonded samples were not fired. A preliminary investigation was carried out on four different particle size distribution curves. In those gradation curves, the dry ratio of kaolin/sand, and the kaolin particle size distribution paths, were kept the same, only the sand grain size distribution was varied. The study was conducted on the chosen best-fitted gradation curve of sand-kaolin. Besides the triaxial tests, direct shear box apparatus was also used, for comparative purposes. For every type of the tested material, three different initial effective confining pressures or normal stresses were applied. Throughout this process, five different bonding levels were used. Several properties of such soils were examined, among them: the stress-strains, the pore water pressure evolution, the stress ratio, other strength parameters, and so on. The equivalent artificial bonded specimens, but in an unbonded state, were used to gain a better understanding of their mechanical characteristics. A novel approach was investigated and established, based on a new parameter called bonding index (B_i). This parameter was set from the bounding surface, which is one of the most important features of bonded soils studied under triaxial tests. The proposed method was evaluated as an effective and practical one. The strength parameters of the bonded soils such as the cohesion intercept, the angle of internal friction, the peak strength, and the stress ratio, were found to be straightly related to B_i. The latter asserted well the enhancement of bonding. Furthermore, B_i would be used to define the confining stress level, from which a B_i close to zero value implies the highest stress level for the artificial bonded soils. However, independent of the stress level, all unbonded soils display a B_i equal to zero value. The coupled effect of B_i and the confining pressure was grouped in three main stages. The first stage, at lower confining stresses, where a remarkable high value of B_i is recorded. The second stage is a step of moderate stress and, the third stage, as where the smallest B_i value was observed. Every stage was associated with a particular behavior of those soils according to the bonding level in presence. It is worth pointing out that a soil sample of higher B_i was found to be less ductile. The suggested method was observed to be an appropriate alternative means for the geotechnical evaluation and analysis of the behavior of structured soil materials. Comparison from the results of both CIU tests and DST revealed a good agreement for weakly and unbonded samples, particularly for strength parameters, the cohesion intercept, and the angle of internal friction. However, for highly bonded materials important divergence was observed, with an overestimation from the DST results. A study of the debonding process was carried out through a new approach. This method was constructed from the deviatoric stress increment (∆q) against the axial strain (ε_a) curves, drawn in a natural scale. Six important features, points, were found to be typical of bonded soils, while only two of them were observed for unbonded samples. The first yield was identified at the initial point, after which the slope of ∆q decreased significantly coupled with the maximum pore water pressure increment 〖d∆u〗_max. This point revealed the debonding process starting point. The second point is at 〖∆q〗_max, at the second yield, a point of major loss of strength. The third and fourth points were at d∆u=0 and ∆q=0 (q_max), respectively; while the fifth point was identified as where 〖∆q〗_min. The last point was at the critical state or the equivalent state. Every point represented a particular behavior state of bonded soils. Throughout the study, it was observed that confining pressure influences considerably the response of bonded soils. For example, the aforementioned six features, specific to bonded soils, were found to be reduced to only two points, particularly for weakly and moderately bonded materials, with the increase of σ_3 from 30 kPa to 700 kPa. Furthermore, a bigger value of the bonding index was achieved at lower confining stress. Therefore, it is recommended, for a better understanding of the behavior of the bonded soil materials, to conduct such investigations at lower initial effective stress, especially for the analysis of the debonding process.
  • Öge
    A new numerical approach for the sauter mean diameter in high speed diesel engines
    (Institute of Science and Technology, 1993) Buğdanoğlu, Selim ; Sağ, Osman Kamil ; 39429 ; Naval Architecture and Marine Engineering
    This thesis is concerned with Ship Propulsion Bearings and Computer Aided Calculation and Operation Program for Propulsion Bearings. It is the main purpose to put forward this study that is the lack of the studies and knowledge concerning ship propulsion bearings. Therefore, it has been discussed arrangements, preliminary design parameters, performance, and routine maintenance tasks, and troubleshooting procedures of ship propulsion bearings. It has also attempted to provide guidance on these subjects along with the "Computer Aided Calculation and Operation Program for Propulsion Bearings" which is entirely written by the author. This computer program written in MATLAB programming language is capable of calculating preliminary design parameters, performance and providing the user routine maintenance tasks, and trouble shooting procedures of ship propulsion bearings. Key feature is to include flexible menu configuration with the aid of visual menu buttons and easy solutions with graphics utilization. Furthermore, It has been also discussed in detail water lubricated rubber bearings, evaluated previous experiments, and statistical values, and then obtained good results. It is believed that this study would be a useful guide concerning "Ship Propulsion Bearings'' to the designers, operators, and researchers.
  • Öge
    A novel risk assessment approach for data center structures
    (Institute of Science and Technology, 2020) Çiçek, Kubilay ; Sarı, Ali ; 634545 ; Department of Civil Engineering
    Structural safety includes evaluation of both structural and nonstructural components of buildings. Although structural design is completed only considering structural elements of buildings, nonstructural components are crucial in an earthquake event. Post-earthquakes areas show that structural safety may not be ensured even when the load-bearing system is undamaged. Failure of nonstructural components resulted in loss of enormous economic losses and loss of life in past earthquakes. Therefore, nonstructural components should also be included in seismic safety evaluation of structures. Researches show that cost of the nonstructural components ranges from \%70 to \%90 of the total cost of buildings. Therefore, nonstructural component failure in structures with high-tech equipment, laboratories, data centers can damage economy significantly. Additional to economic losses from downtime of these structures, repairing or replacement of equipment inside increase the cost extremely. Apart from the economic losses, damaged nonstructural components can be the cause of deaths directly by falling onto people and closing pathways. During and after an earthquake event, damaged nonstructural components can prevent escape of people inside and entry of medical staff. Moreover, operational failures caused by nonstructural components in critical facilities such as hospitals and fire stations, can lead to higher number of deaths after earthquake occurred. Nonstructural components do not participate to load-bearing systems in structures. However, they are still subjected to external loads with the load-bearing system. Therefore, it is crucial to design structures by considering the nonstructural systems inside. Nonstructural components can be classified in 3 groups by their functions: (i) architectural components such as, partition walls and lighting systems, (ii) mechanical-electrical components such as piping systems and generators, and (iii) building equipment such as, computers and file cabinets. Researches show that some of nonstructural components are sensitive to acceleration whereas the rest are sensitive to floor displacement ratio. According to the function of the structure, design should be completed to limit the defining response. This study aims to propose a new method and generate risk curves for structural design and structural evaluation of data centers in high seismic risk regions. A sample structure with base isolation system is selected from current literature in companion with standards for data centers. Structural properties are also selected in companion with standards. After the structure model is generated, probabilistic seismic hazard assessment is completed for the selected site where the main campus area of Istanbul Technical University in Maslak, Istanbul. Source-to-site distances are determined by using online map in General Directorate of Mineral Research and Exploration website. The closest point of main line of Western North Anatolian Fault is approximately 28 km away from ITU campus and the longest effective distance is selected as 65 km on the Western NAF. Probability of rupture distance is taken as uniform and 6 different values of distances between 28 km and 65 km are used in Ground Motion Prediction Equations. Characteristic earthquake method is considered and the characteristic magnitude is used as 7.2 in GMPEs. Probabilistic study is conducted on this structure by using Monte Carlo simulations with the selected structural parameters. Probabilistic distributions for different parameters are taken from various studies in literature. Random samplings are generated for each parameters according to the belonging probabilistic distributions. For comparison purpose the structure is also analyzed as a fixed-base structure. Same procedures are repeated for the fixed-base structure. Failure of nonstructural components are investigated in two different ways. The first failure criterion is overturning-sliding behavior of server racks. FEMA P58 and ASCE 7-16 is used to calculate acceleration limits for anchored nonstructural components. The second failure criterion is the acceleration limitations of servers given by producers and researchers. A special MATLAB code script is generated to run Monte Carlo simulations on OpenSees platform. Fragility curves are generated according to the predefined failure criteria. Risk curves are created for both structures with the site specific annual hazard curve and generated fragility curves. Results show that base-isolation systems reduces the accelerations significantly comparing to the fixed-base structures in higher floors. Another outcome is the isolation systems are highly sensitive to earthquake characteristics rather than structural variables in terms of accelerations. It was also understood that the critical failure mod in data centers is the overturning-sliding behavior rather than vibration failure of servers.
  • Öge
    Adaptive balancing system for low speed rotating systems
    (Institute of Science and Technology, 2020-07) Karakaya, Gürkan ; Altınkaynak, Atakan ; 633599 ; Mechanical Design Programme
    Extra weights, which is not placed on the rotation axis of shafts, create various of problems. In the meantime, unbalanced weights cause additional unwanted moments on systems. Those moments make difficulties on electrical motor against rotating shaft properly. Furthermore, additional moments cause excessive power consumption. On the other hand, shaft position control is getting harder with extra moment on the system. Moreover, when the required moment is increased, the electrical motor can not be utilized directly on the system. Additional power trains, such as gear, belt systems have to be added to the system to create enough moment by electrical motor. These added power trains come up with a bulky system. Furthermore, as the power transmission path is getting longer and longer, the precise of the system is getting lower and lower. Hence, the center of mass of the shaft is tried to be set on the rotation axis of the shaft with the help of counter weights. Traditionally adding counter weights is the common way to balance the shaft. If the shaft and counter balance weights are considered as a system, the system gets bulky with added extra counter weights. On the other hand, when the shaft consists of more than one pieces, the added counter weights ruin the shaft dynamics and constructions. When the shaft is firstly rotated in clockwise direction, then secondly rotated in counter clockwise direction, the system cannot respond in required sensitivity with counter weights because of the wobble problem. When the rotation axis and the principal inertia axis are different, the wobble problem occurs. Therefore, in this thesis work, the system is tried to be balanced with springs and a linear actuator. The system is tried to be minimized with ejected counter balance weights. On the other hand, when the shaft dynamics are changed by changing mass on the shaft or by changing the position of mass, the required balance moment is also changed. Therefore, if the system is tried to be balanced with counter weights, the counter weights quantity and position have to be changed accordingly. However, if the system is balanced with springs, the acting force on the shaft by the spring can be altered much more easily. The connection point of the spring can be changed to control the spring force. Nonetheless, system working speed have to be considered for proper working of the balanced system when the springs are utilized. Otherwise, the spring could be affected by the resonance and the spring could even increase the unbalance moment on the system. The springs are used to balance system in the literature. However, these springs are generally utilized for balancing extending structures, such as robot arms, telescopes and table lamps. In these systems, generally, there is a limited working range. Therefore, spring balanced systems are utilized for the specific working range. This work tries to balance the system for 360 degrees with the help of a spring.
  • Öge
    Akustik yalıtım için dokuma kumaş takviyeli katmanlı hibrid kompozit malzemelerin geliştirilmesi
    (Fen Bilimleri Enstitüsü, 2020) Yaradanakul, Mustafa Çağatay ; Okur, Nazan ; 637735 ; Tekstil Mühendisliği Ana Bilim Dalı
    Günümüz dünyasında gürültü insan yaşamını negatif etkileyen önemli sebeplerden biridir. Günlük hayatımızda trafik, çalışma alanımızda ve evlerimizde bulunan teknolojik cihazlar gibi çeşitli sebeplerden ötürü gürültüler oluşmaktadır. Bu gürültüler insanları, psikolojik olarak büyük ölçüde etkilemekte ve bunun sonucu olarak yaşam kalitesi düşmektedir. Bu sebepten ötürü bulunulan ortamın konfor seviyesini artırmak ya da dış çevreyi olumsuz anlamda etkilememek amacıyla binalarda, taşıt araçlarında, ev eşyalarında sesin azaltılması önem taşımaktadır. Günlük yaşamda ve çalışma ortamında gürültünün kontrol edilmesine ilişkin yönetmeliklerin de getirdiği kurallar çerçevesinde akustik yalıtım her geçen gün daha önemli hale gelmektedir. Dünyada ve ülkemizde insan nüfusunun artışı ve beraberinde artış gösteren ses ve gürültü kirliliğini önlemek ve insanların yaşantılarını daha konforlu bir hale getirmek için kullanılan tekstil malzemelerinin önemi gün geçtikçe artmaktadır. Tekstil malzemelerinden üretilmiş kompozit malzemelerin önemi artmaktadır. Akustik yalıtım için kumaş takviyeli katmanlı hibrid bir kompozit malzemenin geliştirilmesi hedeflenen bu çalışmada cam karbon jüt ve keten kumaşlardan kompozit yapılar oluşturulmuştur. Çalışmanın başında kalınlıklarının ayarlanması amacıyla test üretimleri gerçekleştirilmiş bu üretimler sonucunda kalınlıklara bakıldıktan sonra ideal kalınlıktaki kompozit malzemelerin asıl üretimleri vakum infüzyon tekniği kullanılarak gerçekleştirilmiştir. Üretilen bu kompozit malzemelerin bir boşluklu kumaş yapısı ile bir araya getirilerek oluşturulan katmanlı hibrid kompozit malzeme yapılarının ses absorbsiyon özellikleri incelenmiştir. Sırası ile yerleri değiştirilerek oluşturulan yapıların ses absorbsiyon özellikleri incelenmiştir. Öncelikli olarak malzemeler kendi içlerinde 3 katlı olarak incelenmiştir. Ardından değişik sıralı yapılar oluşturularak bu yapıların ses absorbsiyon katsayıları incelenmiştir.
  • Öge
    Akıllı çok ölçütlü yasal takip avukatlık ofisi performans yönetimi sistemi
    (Fen Bilimleri Enstitüsü , 2020-06) Uruç, Erdinç ; Onar, Sezi Çevik ; 642735 ; Endüstri Mühendisliği Anabilim Dalı
    Yapılan tez kapsamında, zamanında ödenmeyen borçlar için firmaların birlikte çalıştığı yasal takip süreçlerini yürüten avukatlık ofislerinin performanslarının ölçülmesi için bir model geliştirilmiştir. Model geliştirilirken analitik hiyerarşi süreci ve bulanık analitik hiyerarşi temel alınarak iki farklı yöntem ile hesaplama yapılmıştır. Hesaplamaları yapmak üzere Java dili kullanılarak bir yazılım uygulaması geliştirilmiştir. Yazılım uygulaması, hem AHP(Analitik Hiyerarşi Prosesi) hem de BAHP(Bulanık Analitik Hiyerarşi Prosesi) için firmaların performanslarını hesaplamakta ve hesaplama sonucunda avukatlık ofislerini performans puanına göre sıralamaktadır. Günümüzde ödenmeyen borçların miktarı gün geçtikçe artmaktadır. Firmalar müşterilerine ürün ve hizmetlerini sunmakta ancak her zaman bunların karşılığında ödemelerini zamanında alamamaktadır. Bu durum firmaların nakit akışlarını, cirolarını, kredi puanlarını ve hatta marka değerlerini ciddi anlamda etkilemektedir. Bu nedenle firmalar ödenmeyen borçların tahsilatı konusuna büyük önem vermektedirler.
  • Öge
    An alternative approach to accident analysis and prevention: Road safety audit
    (Institute of Science And Technology, 2020) Yücel, Hassanburak ; Atahan, Ali Osman ; 633553 ; Ulaştırma Mühendisliği Bilim Dalı
    One of the most common studies in the world within the scope of road safety is the Road Safety Audit. The Road Safety Audit, which was carried out for the first time in England, has been carried out in many countries for more than thirty years. Road Safety Audit basically follows the steps of auditing a road section, determining safety problems, and taking necessary measures. In the Road Safety Audit, analyzes are carried out in the field with the help of various checklists, and the problematic points are tried to be determined. The main topics in the checklists are; general topics, intersections, interchanges, alignment, and cross-section. In addition, road users and road surface issues are also evaluated. Within the scope of this thesis, the accidents that occurred in Ankara between 2016-2019 were examined with the aid of the Geographical Information Systems supported by the Kernel Density method. As a result of the analysis, the Road Safety Audit was carried out for Atatürk Boulevard, where most accidents occurred. In Road Safety Audit; general issues, intersections, interchanges, alignment, cross-section, road user and road surface were inspected. As a result of the analyzes, it was determined that Atatürk Boulevard, which was built approximately 100 years ago, is the busiest region of the city and could not meet the traffic demand. In addition, the difference between the design speed and the average speed of the drivers has been found to cause safety problems. Besides, it is determined that advertisement signs are frequent because of being the busiest region of the city and this restricts the view distance. Moreover, some deformations on the road surface have been observed to cause safety problems. Furthermore, it has been determined that the design contains safety problems for disabled individuals and bicycle users. As a result, it was determined that Atatürk Boulevard could not meet the traffic density of today, but with the measures taken, there would be a decrease in the number of accidents.
  • Öge
    Alümina esaslı dökülebilir refrakterlerin SiC ve C ilavesi ile geliştirilmesi
    (Fen Bilimleri Enstitüsü, 2002) Mingü, Kamil ; Özgen, Serdar ; 126677 ; Seramik Mühendisliği
    SiC ve C katkısı ile; pek çok monolitik refrakterin, cüruf korozyonuna ve termal şoka dayanımı artmaktadır. Ancak, bu bileşenler kolaylıkla okside olmakta dolayısıyla yüksek poroziteye ve yapıda zayıflıklara neden olmaktadır. Yüksek fırında ve pik demir taşımada genellikle, oksitleyici olmayan cürufa karşı, yüksek korozyon direnci gösteren AI2O3-SİC-C refrakterleri tercih edilmektedir. Çelik yapımı uygulamalarında oksitleyici cüruflar, SiC ve C içerikli dökülebilir refrakterlerin kullanımını kısıtlamaktadır. Bu çalışmada, SiC ve C içeren Alümina esaslı düşük çimentolu dökülebilir refrakterler incelenmiştir. Çalışma teorik ve deneysel kısımlardan oluşmaktadır. Teorik kısımda AI2O3-SİC-C dökülebilir refrakterlerin çelik endüstrisindeki gelişimi, genel malzeme karakteristikleri ve korozyon mekanizmaları anlatılmıştır. Deneysel kısımda farklı miktarlarda SiC içeren karışımların test sonuçları karşılaştırmalı olarak değerlendirilmiştir. Optimum SiC miktarı bulunduktan sonra karbon katkısı miktarı belirlenmiştir. SONUÇLAR: Yapılan kimyasal ve fiziksel deney sonuçlarına göre; AI2O3-SİC-C esaslı dökülebilir refrakter karışımı optimize edilmiştir. Sonuç karışım Tablo 1' de verilmektedir. Çimentonun dehidratasyonu sonucu oluşan su buharının varlığı; oksidan ortamda, örneklerin yüzeylerinde amorf silika tabaka oluşmasına neden olmaktadır. Mukavemette azalma, numunelerin indirgen ortamda sinterlenmesi sonucu düşmüştür. Yapılan Cüruf testinde; karışıma SiC ilavesi ile cüruf geçirgenliği azalmıştır Tablo 1 Optimize edilmiş karışımın bileşenleri.
  • Öge
    An action research on the integration of virtual reality into industrial design education
    (Graduate School, 2021-10-13) Hamurcu, Ahmet ; Öğüt, Şebnem ; Rızvanoğlu, Kerem ; 502142901 ; Industrial Product Design
    Industrial designers have always tended to use computers and computer-based technologies that they believe will help them do their works better and easier, and thereby, they quickly adopted them. Also, these technologies adopted by professionals have usually been used by industrial design students and/or educators and they were integrated into industrial design education shortly after their adoptions because it is conducted as a simulation of professional life. However, although Virtual Reality (VR) technology that is one of the computer-based technologies has become economically available for designers with the release of VR headsets such as HTC Vive and Oculus Rift in 2016, and has already been adopted by professionals, how it can be integrated into industrial design education is still unclear. Moving from this point of view, this thesis explores how VR technology can be integrated into industrial design education. For this purpose, an action research was conducted by trying to use it under the real conditions of an industrial design studio course. In the first step of the research, a systematic literature review on related works in addition to the general literature review and a preliminary study with prospective users (industrial design students and instructors) were carried out to reveal (i) what the former studies regarding the use of VR technology in industrial design education are; (ii) what these studies say about this issue; and (iii) what the opinions of potential users, who are industrial design students and instructors, about the use of VR technology in industrial design education are. The systematic literature review showed that VR technology was tried to be used before in the professional practices of industrial design as: a usability evaluation tool; an ergonomic evaluation tool; a visualization tool; a product demonstration tool; a presentation tool; an interactive prototyping tool; an immersive mood board; a sketching tool; and a collaboration tool. However, none of these types of use was tried to be employed before under the real conditions of the educational setting of an industrial design studio course. The preliminary study was conducted with industrial design students and instructors who came from 10 universities in Turkey. In this preliminary study, first, VR technology was introduced to the participants. Then, it was experienced by the participants. And then, both quantitative and qualitative data based on their opinions were collected and analyzed. The results of the preliminary study revealed that: (i) potential users are eager to use VR technology; (ii) however, they have reservations as well as their positive opinions about using it in industrial design studio courses; and (iii) almost all these reservations are related to its usability. In the second step, an in-studio study was planned based on the findings of these studies, and with a focus on getting started by eliminating or by minimizing these reservations as much as possible. In the third step, in line with this planning, VR technology was tried to be used in the studio-based practices of an industrial design studio course. This in-studio study was carried out in the course "EUT 320E Industrial Product Design III" with the project issue "Smart Electric Minibus Design for Anadolu Isuzu". This course was the 3rd year industrial design studio course of Istanbul Technical University (ITU) Department of Industrial Design, which was conducted in the 2017-2018 spring semester. In this process where the course process and the research process merged, the researcher worked: as one of the instructors of the course; as an operator who is responsible for installing and running the VR system properly, and responsible for its being used easily and hygienically; as an educator who will meet the learning need for VR. In the in-studio study, (i) how VR technology can be integrated into the jury practices of industrial design education was questioned by making the use of it mandatory by students for design representation and presentation purposes, and then, by trying to use it in the jury sessions; and (ii) how it can be integrated into other studio-based practices of industrial design education was questioned by making it available for use during the studio hours of the course, and then, by observing whether it will be used for/in other studio-based practices. Throughout the project process of the course, it was attempted three times to integrate VR technology into the jury practices of the course. In the last attempt, this was achieved. Each attempt was scrutinized with the observations recorded during the jury sessions and the interviews with the user groups after the jury sessions. The interviews with the students were held as group interviews, whereas the interviews with the instructor-jurors were held one-to-one. Since it was not possible to hold face-to-face interviews with the invited jury members, their opinions were tried to be gotten via e-mail. These attempts and examinations show step-by-step how VR technology can be integrated into the jury practice of industrial design education by developing solutions in line with the needs and demands of students and instructors. On the other hand, it was observed that (i) making VR available for use during the studio hours and giving a short training on how to use its hardware and software opened the way of using it as a design evaluation tool by students; and (ii) neither students nor instructors demanded or attempted to use VR in other practices and activities where students and instructors got involved together. In the last step, considering the results of the in-studio study, (i) the usability level of the proposed way for using VR technology in the final jury session was measured with the help of the System Usability Scale (SUS); (ii) the final assessments of students and instructors on the VR technology they used during the project process and its use in the educational practice of industrial design were revealed with the help of the interviews with students and instructors and the questionnaire items adapted from the scale items of the Extended Unified Theory of Acceptance and Use of Technology (UTAUT2) and the Net Promoter Score (NPS); and (iii) the reasons why VR technology was not used in other practices and activities where students and instructors got involved together were questioned with the help of interviews with students and instructors. The SUS score was calculated as 71.3. This score indicates that the usability of the last proposal for using VR technology in the jury practices of industrial design education is OK but can be improved. Besides, the final assessments of students and instructors on the VR technology they used during the project process and its use in the educational practice of industrial design revealed that although they found VR technology useful in various aspects and easy to use at various degrees, they still had some reservations in their minds. However, this time, these reservations were based upon (i) whether the facilitating conditions about the frequent or the continuous use of VR technology were sufficiently present; and (ii) the thought that using it for evaluating designs of small products will not be so useful. On the other hand, it was seen that the reasons why VR technology was not used in other practices and activities where students and instructors got involved together were related to (i) not having yet sufficient familiarity and mastery of its use in such activities and practices; (ii) perceiving VR as a technology that would only enable to evaluate and/or present the whole – not the parts – of a design over a finished model; and (iii) not being its set-up ready for use when needed. In addition to all these, participants stated that for the use of VR technology in industrial design education to be sustainable, (i) it should be easily accessible and usable for both students and instructors with a permanent installation in the studio environment; (ii) it should be led/managed by at least one instructor/executive; and (iii) the requirements of the technology such as installation/setup, learning, operating, and maintenance requirements should be met by at least one technical person/expert/operator. As a result, this thesis study contributes to the relevant literature (i) by showing, step-by-step, one of the ways of integrating VR technology into the jury practice of industrial design education; (ii) by revealing the clues of how it can be integrated into other studio-based practices of industrial design education; and (iii) by outlining what might be the possible attitudes of industrial design students and instructors towards the use of VR technology in industrial design studio courses before and after the actual use of it in those courses. This thesis study is one of the first attempts in the literature to integrate VR technology into industrial design education by trying to use it under the real conditions of an industrial design studio course. Hence, its outcomes need to be verified and/or improved with similar studies. Besides, how it can be integrated into other studio-based practices of industrial design education is still not clear enough because the relevant part of the study has been conducted with an unstructured intervention. Therefore, it should be noted that there is also need for further studies to be carried out with structured interventions on this issue.
  • Öge
    An enhanced two phase commit protocol for high performance consistency management in replicated state machines
    (Institute of Science and Technology, 2020-07) Uyanık, Halit ; Ovatman, Tolga ; 637248 ; Computer Engineering Department
    State Machines are used to represent a set of transitions, which makes it a useful tool for representing life-cycle of a specific set of events. By utilizing this property, a state machine can be replicated into several machines and each one of them can communicate with one another in order to keep track of the order of changes. This is called the replicated state machine approach and it is highly used in replicated data services where there is a need to manage the consistency of a system. In order to provide any consistency, it is necessary to use a communication algorithm which provides both high throughput, and less number of failures in the case of conflicting operations. One of the widely known communication protocols used in our context is the two-phase commit (2PC) protocol. It provides a two step algorithm in order to manage the committing actions between different machines for the same resource. First it checks if every machine in a network is ready for writing operation, then if a machine receives a successful message from all other machines, it will then proceed to commit the specific operation to all of them. Finally it applies the commit to its own resource. In the case of no priority between the writing actions between different machines, algorithm gives the commit rights to the first machine which can successfully receive OK from all others. However, when priority comes into action, and it becomes necessary to cancel out transitions with less importance, algorithm starts to cancel out some incoming transitions, and in most cases, if the writing operations are too frequent, it cancels out a writing operation even if it obtains its OK from other machines. Disadvantage of the common 2PC algorithm in the case of priority introduction, due to its phases follow one another without any transitions, when an incoming writing request fails, it has to repeat all the preceding events from that point again. When the distance between the last important point of no-return, such as reading a value into cache, and the point of 2PC protocol becomes further away, this affect is increased and the number of messages for a successful transition is increased. In order to reduce the overhead introduced by this problem, a new algorithm is implemented by enhancing the existing 2PC algorithm. Both steps of the 2PC algorithm mentioned is separated from one another, and can be freely deployed in any place on a state machine, as long as their order is preserved.
  • Öge
    An intelligent overtaking assistant for autonomous racing cars
    ( 2020-07) Armağan, Ersin ; Kumbasar, Tufan ; Department of Control and Automation Engineering
    Nowadays, advanced driver assistance systems are becoming more popular since they are being used more and more in commercial vehicles. Interest in advanced driver assistance systems is growing because they prevent car accidents and improve driving comfort. As a solution, computational/artificial intelligence applications have been employed in the literature to design advanced driver assistance systems. Control systems such as PID controllers, fuzzy logic based controllers are also widely used for advanced driver assistance systems. Recently, the usage of fuzzy logic based control systems in the control of advanced driver assistance systems and autonomous driving systems has also increased significantly. Fuzzy logic based systems are preferred in many research areas because it is capable to imitate expert behavior even in complex systems. For example, fuzzy logic based control systems are effectively implemented especially decision-making applications, system modeling and control applications.
  • Öge
    Application of artificial intelligence to Scada systems
    (Institute of Science and Technology , 1991) Topbaş, Safa ; Karadoğan, Haluk ; 19294 ; Mechanical Engineering
    Şebekeler Şebekeler her türlü bilgi ve enerjiyi taşımak amacıyla kullanılan proses ve işlemlerden oluşan ortamlardır. Bu bağlamda şebeke; - malzeme (katı, gaz, sıvı); enerji ve bilgi taşıma ve dağıtma - yolcu veya mal nakli için kullanılan trafik yolları (kara, hava, deniz vs. ) için kullanılan her türlü ekipmanı kapsayan sisteme verilen genel isimdir. Taşıma işlemi kaynaktan tüketiciye yapılırken depolama, saklama ve talebe bağlı değişimlerin optimal olarak karşılanması istenir. Arz / talep ilişkisi şebekelerin boyutlandırır İması ve işletilmesinde temel etkenlerdir; böylece üretim ve depolama boyutlarının referans değerleri rahatlıkla saptanabilir. Şebekelerin Otomasyon ve Kontrolü Dağıtım şebekelerine ait elemanlar genellikle büyük coğrafi alanlara dağılmış durumdadırlar, bunun sonucunda otomasyon ve kontrol elemanlarıyla, işletim personelinin farklı konumlarda olmasının gerekliliği ortaya çıkmaktadır. Böylece insan ve makina arasında bir bilgi taşıma ortamının da kullanılması zorunlu hale gelmektedir. Şebekelerin otomasyon ve kontrolü özellikle şu endüstriler inde öneme sahip olmaktadır: sektör- Elektrik dağıtım ağları Gaz şebekeleri Petrol ürünleri dağıtım şebekeleri Su, atık su, kanalizasyon şebekeleri Bölgesel ısıtma sistemleri Trafik yönetim sistemleri Veri iletişim şebekeleri
  • Öge
    Application of matrix product states for few photon dynamics and quantum walks in reduced dimensions
    (Graduate School, 2021-12-02) Danacı, Burçin ; Subaşı, Ahmet Levent ; 509142102 ; Physic Engineering
    Numerical simulations of low-dimensional quantum many-body systems have been a very active field in recent years. New techniques have enabled the experimental realization of these systems and have shed light on both theoretical and technological developments. However, the numerical simulations of these systems have been challenging due to the exponential growth of the Hilbert space with the system size. In addition, quantum correlations such as entanglement play an important role in many-body systems. Therefore approximate methods have been developed. One of the methods to simulate such quantum systems in one dimension is the Matrix Product States (MPS) Formalism. In this thesis, we concentrate on the application of MPS to quantum optical systems and quantum walks. For this purpose, we have developed a pedagogical numerical library that consists of functions responsible for the efficient representation of the wave function and its time evolution. We have tested the efficiency of these functions for different parameters. The quantum optical system we consider is a one-dimensional coupled cavity array interacting with a two-level system. One of the techniques to simulate the long-time dynamics of a quantum many-body system in a computationally manageable grid is to impose absorbing boundary conditions. We have applied absorbing boundary conditions in the form of an imaginary potential and determined the optimum parameter intervals for efficient simulation. Another objective of this thesis is to examine the photon dynamics and the decay of the two-level system from its excited state for different interaction strengths. We have shown that in the strong interaction regime where rotating wave approximation (RWA) is applicable, the results obtained from exact diagonalization and MPS simulations are in perfect agreement. For higher interaction strengths we have used polaron transformation to lower the effective interaction and applied RWA afterward. We have discussed the differences between the results in terms of photon numbers and the excited-state population of the two-level system. As part of this thesis, we have studied two types of discrete-time quantum walks. Firstly, we have considered a quantum walk with a single-phase impurity and investigated the effects of the bound states on its spatial localization and non-Markovianity properties. In Markovian systems, there is an irreversible flow of information from the system under consideration to its environment, whereas in non-Markovian systems some of this information flows back to the system. Our findings show that there is a strong relation between localization and non-Markovianity in this model. Secondly, we turned our attention to a quantum walk coupled with a spin chain environment where there is a dynamic spin attached to each site. Using our MPS algorithm, we have studied the relationship between the quasi-energy spectrum obtained from the exact diagonalization of finite systems, dynamical localization, entanglement entropy, and spin dynamics of this walk. We have observed that due to the extensive number of conserved quantities it possesses, this model is similar to the disorder-free localization models found in literature, where disorder is induced due to the interaction between the constituents of the system.
  • Öge
    Application of multi-objective optimization criteria in inverse optimal control of nonlinear systems
    (Institute of Science and Technology, 2020-07) Akoum, Mohamad ; Günel Öke, Gülay ; 638065 ; Kontrol ve Otomasyon Mühendisliği Ana Bilim Dalı
    This thesis is based on applying multiobjective optimization algorithms on inverse optimal control with the aim to obtain a controller that would satisfy the requirements of the application set by the controller designer, and present a deeper look at how choosing parameters of inverse optimal control would affect the overall behavior of the system.
  • Öge
    Ar-Ge projelerinin ticarileştirilmesindeki bariyerlerin bulanık bilişsel haritalama ile ele alınması: Beyaz eşya sektöründe bir uygulama
    (Fen Bilimleri Enstitüsü, 2020) Hussi, Merve ; Asan, Umut ; 636934 ; Endüstri Mühendisliği Ana Bilim Dalı
    Bu çalışmada, beyaz eşya sektöründeki Ar-Ge projelerinin ticarileştirilme başarısızlığının uzun vadede önüne geçebilmek için hangi bariyerlere odaklanılması gerektiğinin ortaya konması hedeflenmiştir. Geliştirilen teknolojilerin ticarileşme başarısı günümüzün dinamik ve rekabetçi pazar ortamında hayatta kalabilmek için önemlidir. Sürekli yeni çıkan teknolojiler, değişen müşteri ihtiyaçları ve trendler nedeniyle firmaların bu dinamik yapıya ayak uydurması gerekmektedir. Yeni bir ürünü veya özelliği pazara ilk sunan olmak marka değeri ve rekabet avantajı açısından büyük önem taşımaktadır. Dolayısıyla rekabet avantajı kazanmak, karını arttırmak, sürdürülebilirliğini sağlamak açısından ticarileştirmeye verilen önem yüksek düzeyde olmalıdır. Bu nedenle de bu çalışmada, Ar-Ge projelerinin ticarileştirilememesinde etkili olan bariyerler belirlenerek uzun vadede ticarileştirme başarısızlığının minimuma indirilmesine katkı sağlanması hedeflenmiştir. Çalışma kapsamında ilk olarak detaylı bir literatür taraması yapılmıştır. Ticarileştirmeyi çeşitli alanlarda ele almış birçok çalışma incelenmiştir. Yapılan çalışmalarda hangi yöntemlerin kullanıldığı, hangi başarı/başarısızlık faktörleri ve bariyerlerin ele alındığı, çalışmaların amaç ve bulguları detaylı olarak incelenmiştir. Literatüre bakıldığında çoğunlukla teknolojinin ticarileştirilmesi adı altında çalışmalar yapılmış olup bunun yanında Ar-Ge projelerinin ticarileştirilmesi, üniversite araştırmalarının ticarileştirilmesi başlığı altında yapılan çalışmalar da mevcuttur. Literatürlerde yakıt hücresi teknolojilerinin ticarileştirilmesi, yenilenebilir enerji kaynakları teknolojilerinin ticarileştirilmesi gibi özel olarak odaklanılan sektörler de vardır. Literatüre bakıldığında ticarileştirme üzerine yapılan çalışmaların çoğunluğunda yapısal eşitlik modellemesi, lojistik regresyon analizi, vaka analizi gibi yöntemlerin kullanıldığı görülmüştür. Bu yöntemler kullanılırken bazıları ticarileştirmeyi etkileyen başarı faktörlerine odaklanmış bazıları başarısızlık faktörlerine odaklanmış ve bunları bariyer olarak da adlandırmıştır. Bu çalışmada, literatürde kullanılmış yöntemlerden farklı olarak kısıtlayıcı varsayımları olmayan, etkin karar vermeyi destekleyen ve ticarileştirme alanında daha önce hiç uygulanmamış olan bulanık bilişsel haritalama yöntemi kullanılmaya karar verilmiştir. Ar-Ge projelerinin ticarileştirilmesindeki bariyerlerin belirlenmesi probleminin yapılandırılıp analiz edilebilmesi için kullanılan bu yöntemin bir üstünlüğü, bu karmaşık problemin bileşenleri arasındaki nedensel ilişkiler üzerinden sistemin davranışını dinamik olarak modelleyebiliyor olmasıdır.Aynı zamanda BBH ile karmaşık ilişki ağları görselleştirilerek problemin daha etkin bir incelemesi yapılabilmektedir. Fakat Ar-Ge doğası gereği belirsizlik içerdiğinden ve değişkenlik gösterdiğinden sonuçların da başlangıç koşullarına duyarlı olması ve değişkenlik göstermesi açısından klasik bilişsel haritalama metodu yerine literatürde yeni önerilen başlangıç koşullarına duyarlı bulanık bilişsel haritalama kullanılmıştır
  • Öge
    Argent: A web based augmented reality framework for dynamic content generation
    (Institute of Science and Technology, 2020-07) Kurt, Gökhan ; İnce, Gökhan ; 636478 ; Game and Interaction Technologies Programme
    In the modern world, people are more and more interested in interactive technologies. Education, research and business habits are effected by this change and humans can be more efficient using interactive technologies. Augmented reality (AR), which is a novel addition to those interactive technologies, is especially effective in this matter. Through augmented reality, people can immerse more deeply with the subject experience and they can have enhanced interaction. Despite the usefulness of augmented reality, it may not always be efficient develop an AR application in terms of development cost. AR development still requires knowledge and experience with certain tools and frameworks. Such tools are usually programming and game development tools and they require programming and technical skills that is gained by long-term education and training. People experienced in design and content creation can be deprived of the ability to create and maintain AR applications. Nowadays, tools like Unity, Vuforia, ARKit and ARCore provide ways to develop AR applications without the need to have knowledge of low-level calculation and programming that is required for AR technology. Normally, developing an AR application would have taken years of research and development by large teams, but thanks to SDK and APIs provided by these tools, AR applications can be developed by small development teams easily and quickly. However, AR is still not easily accessible by all the tech-savvy people that may be interested in developing such applications. Majority of AR applications are developed using Unity. There are visual programming solutions in Unity, but they are not suitable to be used in AR applications. A Unity-based tool that allows people without programming skills to create AR applications, will be utmost useful. Such a tool would require features such as, creating an application without programming, optional support to do programming and scripting, real time updates and ability to ship without any build and packaging step, support for 3D object, image and video, the ability to modify objects and preview them in real time, and the ability to create user interfaces. The tool should also have a user friendly interface and experience. It should introduce the innovative features without changing the conventional workflows. Existing tools do not provide these features which are crucial for an ordinary person to create AR applications.
  • Öge
    An assessment of building information modeling (BIM) implementation for the Turkish transportation infrastructure industry
    (Institute of Science and Technology, 2020-07) Yiğiter, Feyza ; Atahan, Ali Osman ; 633458 ; Ulaştırma Mühendisliği
    Transportation infrastructure, which includes highways, railways, bridges, airports, and tunnels, is an integral part of the socio-economic development of a country. There is a great need for innovative techniques and technologies that increase productivity and efficiency in terms of time, cost, and quality for the design, construction, operation, and maintenance of transportation structures due to the growing population and the increasing demand for transportation. Building Information Modeling (BIM), an innovative technology widely adopted in the construction industry, has the potential to revolutionize the transportation infrastructure industry due to the knowledge-based nature of transportation infrastructure projects. BIM enables the creation of a 3D object-based and parametric model of a structure, and the BIM model supports collaborative working and interoperability among all disciplines via a digital information-sharing platform. It aims to ensure that all the information generated through the lifecycle of a project is accurately and efficiently stored, shared and used, thereby to make the decision-making and problem-solving processes easier, quicker and more accurate based on the information, and ultimately to minimize the possible time, cost and quality losses of the project. While the initiatives and investments are increasing in Turkey, as with the other countries in the world, BIM is not widely implemented in the Turkish transportation infrastructure industry.
İTÜ tezleri telif hakkı ile korunmaktadır. Bunlar, bu kaynak üzerinden herhangi bir amaçla görüntülenebilir, ancak herhangi bir biçimde yeniden oluşturulması veya dağıtılması yazılı izin alınmadan yasaklanmıştır. İzin hakkında istekte bulunmak için URL adresini ziyaret ediniz.