Browsing Fen Bilimleri Enstitüsü by Title

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  • D.C. photoconductivity in As2Se3 thin films 
    Atak, Kaan. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2003., 2003.)
    In this thesis, the D.C. photoconductivity in amorphous thin films of As2Se3 is investigated. The temperature dependence of dark, and photo currents are explored at the interval 240 - 360 K. Three regimes are observed in ...
  • Daily life oriented indoor localization by fusion of smartphone sensors and Wi-Fi 
    Nurdağ, Ayşe Vildan. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2018., 2018.)
    Smartphones are leading among the fastest-growing technologies. With their nu merous features, smartphones are the best assistants to users in their lives on several counts. However, a smartphone still requires an extensive ...
  • Damage phenomenon in highly filled elastomers 
    Tunç, Birkan. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2017., 2017.)
    The complete pathway to construct a constitutive model well suited for nite element analysis of highly lled elastomeric materials undergoing large deformation and damage was studied. The e ects of viscoelasticity, ...
  • DAQ link and IBERT studies of CMS HGCAL back end electronics 
    Tatlı, Taylan. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2022., 2022)
    The HL-LHC experiment will face two main challenges: high radiation due to increased high integrated luminosity and large amount of data resulting from high instantaneous luminosity. To overcome these two challenges, CMS ...
  • Dark energy problem and possible solutions 
    Çamlıbel, Ali Kazım. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2009., 2009.)
    The end of the twentieth century is marked by a revolutionary discovery in cosmology: The expansion of the universe is accelerating, as revealed by measurements of type Ia supernovae at z 1. This most likely means that ...
  • Data acquisition system 
    İskit, Sabri Metin. (Thesis (M.S.)- Bogazici University. Institute for Graduate Studies in Science and Engineering, 1981., 1981.)
    In this study several analog to digital converter systems are described and their advantages and disadvantages are told. Among them,a successive approximation type one is designed and buit.To obtain flexibility, it is ...
  • Data augmentation on chest x-rays for improving pathology classification performance 
    Adıgüzel, Onur. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2022., 2022)
    In recent years, deep learning techniques have made great progress. We can see applications of it in many fields such as economics, military, healthcare, and so on. Healthcare, in particular, is one of the most critical ...
  • Data compression and reconstruction in process engineering applications 
    Önol, Ceyda. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2012., 2012.)
    Recent improvements in sensor technology have resulted in huge amount of measured process data along with the increasing need for compression prior to storage. Hence, efficient process data compression and reconstruction ...
  • Data mining for carbon dioxide adsorption over amine modified adsorbents from publications in literature 
    Yıldız, Merve Gamze. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2017., 2017.)
    The aim of this thesis is to extract knowledge for carbon dioxide adsorption over amine modified adsorbents using two data mining techniques that are decision trees (DT) and artificial neural networks (ANN). The experimental ...
  • Data mining for methane adsorption over metal organic frameworks in literature 
    Gülsoy Şerif, Kadriye Zeynep. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2019., 2019.)
    A database containing 3000 data points for both gravimetric and volumetric CH4 storage/delivery in metal organic frameworks (MOFs) was analysed using machine learning tools via RStudio functions to extract knowledge for ...
  • Data reduction methods in just-in-time-learning 
    Boy, Onur Can. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2021., 2021.)
    Industrial processes are monitored continuously to meet the standards dictated by the market and environmental regulations. There are many process variables like temperature, pressure, flow rate which can be easily ...
  • Data stream analysis 
    Çalışkan, Mine Melodi. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2018., 2018.)
    In this thesis we give a survey of online machine learning algorithms for data stream analysis. After giving an overview of standard batch algorithms, we explain batch-to-online conversion, and we give a in-depth description ...
  • Data-driven local search heuristics for bilevel network design problems 
    Sevim, İsmail. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2022., 2022)
    In the Network Design Problem (NDP), one aims to design the configuration of a network by installing links between a set of given nodes and determine the flow of a set of commodities over these installed links. In this ...
  • Data-driven operators for a hybrid evolutionary algorithm to solve multi-trip rich vehicle routing problem 
    Aykanat, Dilara. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2020., 2020.)
    Vehicle routing problems have been the subject of intensive research due to their di culty as a combinatorial optimization problem and their importance in real life operations. Heuristics are widely preferred to solve VRPs ...
  • Datasets and transformer models for cross-lingual relation classification 
    Köksal, Abdullatif. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2021., 2021.)
    Relation classification is one of the key topics in information extraction, which can be used to construct knowledge bases or to provide useful information for question answering. Current approaches for relation classification ...
  • DC-DC buck converter for triboelectric energy harvesting applications 
    Becermiş, Mustafa. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2019., 2019.)
    Energy harvesting applications are getting more popular day by day. Self sufficient circuits which do not require any supply, are more than a luxury for many situations. Usage of the battery can be expensive and not useful ...
  • DDOS attack detection by control charts 
    Kalemci, Aysun. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2019., 2019.)
    Distributed Denial of Service (DDoS) attacks are considered as the major threats in today’s cyberworld. The fact that the source of these threats is often uncertain increases the concerns of many network operators. These ...
  • DDoS attack detection by using packet features 
    Korkusuz, Ammar Yasir. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)
    DDoS attacks have been in internet life for a long time and most of hosts are still vulnerable for DDoS attacks. Complete detection and prevention of DDoS attacks is almost impossible, since their working method. Especially, ...
  • DDoS attack detection using frequency domain characteristics 
    Fouladi, Ramin Fadaei. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    Providing 24-hour service to the users, is one of the major concerns of network administrators. A denial of service attack refers to a condition that a server cannot give normal services to its legitimate clients due to ...
  • DDoS attack detection using signal processing and statistical approaches 
    Erhan, Derya. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2021., 2021.)
    DDoS attacks cause a variety of changes in the properties of the attributes in the network traffic. Modeling these changes using signal processing and statistical ap proaches provides detection of these attacks. This thesis ...

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