Sürdürülebilir Yeşil Kampüs Koleksiyonu / Sustainable Green Campus Collection

Permanent URI for this collectionhttps://hdl.handle.net/11147/7755

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  • Doctoral Thesis
    Analysis of Walkability Measurement Tools (wmts)
    (Izmir Institute of Technology, 2019) Paykoç, Eda; Akış, Tonguç
    Walking is the most basic act of human which makes all equal and liberates them in the built environment. For defining how walking friendly the area is, walkability is an issue started to be discussed from its several different aspects. Although walkability is studied from several different disciplines, it has neither accurate definition nor definite criteria.Starting from 1990s, walkability has started to be measured with hard-copy walkability measurement tools (WMTs) and followed by web-based walkability measurement tools. In the literature, WMTs are generally used as a tool to measure the walkability level of the selected case. However, there are few studies which tries to understand and examine the background process of these WMTs.The aim of this thesis is to categorize and define the background idea of walkability measurement tools by criticizing their keystones and their main ideas. The mapping, clustering, tabling and analyzing processes are the main devices to develop critical analysis. In tabulation, two specific charts are composed: Comprehensive Data Chart and Content Analysis Chart. Under Comprehensive Data Chart, properties of WMT are defined and categorized. In Content Analysis Chart, each tool’s content of WMTs are compared and criticized. Finally, the thesis developed a critical analysis for defining, comparing and understanding each and every single WMT.
  • Doctoral Thesis
    Children's Perceptions of Their Urban Outdoor Experiences: the Case of Izmir
    (Izmir Institute of Technology, 2019) Dikmen Güleryüz, Oylum; Doğan, Fehmi; Kasalı, Altuğ
    Research in children’s outdoor experiences is a rapidly growing field of investigation together with the increasing interest in the problems associated with rapid urbanization. Although there are studies that document positive and negative consequences of the built environment on children, children’s use of urban environments need to be investigated further in cities with fast urbanization rate where children are at a disadvantage especially given the fact that technology. The aim of this thesis is to understand through the eyes of children the intercorrelated relationship between physical characters of urban environments and the way outdoor environments are used. Therefore, a multi-site field study is conducted in five different urban zones with different physical and demographical characteristics (central, gated community, squatter settlement, mass housing and point-block settlement) in İzmir, Turkey which has high rates of urbanization and population growth. The study follows a mixed-method approach. The participants included 370 fourth grade primary school children and 258 parents. Even though the living environments selected for this dissertation vary in terms of physical qualities and demographic characteristics, 77% of children reported to prefer spend their free time outdoors. However, the study provides evidence to link children’s preferences regarding place and duration of use, and the way they use outdoor environments vary among the urban zones studied. The findings of the dissertation is linked to the growing literature on the subject with the aim to contribute to the improvement of children’s environments in cities, and the related policy-making efforts worldwide.
  • Doctoral Thesis
    A Model for Assessing Acoustic Comfort in Enclosed Public Spaces
    (Izmir Institute of Technology, 2019) Çakır, Onurcan; İlal, Mustafa Emre
    Acoustic comfort is one of the important topics in terms of user satisfaction. In order to determine and control acoustic comfort, measurable parameters are needed to be able to compare and improve soundscapes. Parameters for architectural acoustics, like reverberation time and sound pressure level are widely used for this purpose. Psychoacoustic parameters like loudness, sharpness, roughness and fluctuation strength are mostly used for determining the sound quality of mechanical sounds. They have also started to be used for evaluating soundscapes of open areas and enclosed spaces. This research aims to find out the relationship between the psychoacoustic parameters and acoustic comfort in non-acoustic enclosed public spaces, specifically in eating establishments. To reach this aim, both on-site measurements and in laboratory listening tests were conducted in five eating establishments. During on-site measurements, a simultaneous questionnaire study was also conducted. Subjective and objective data were comparatively evaluated. Listening tests were based on auralizations with calibrated simulation models. This provided a research model, that allows control over the acoustic environment without having to make real changes in the physical elements of the eating establishments. The auralization sound files were presented to listening test participants with headphones and they evaluated soundscapes with different psychoacoustic properties. The last chapter provides a summary of results and suggestions for future studies. Better acoustic comfort was found to be related with higher sharpness, lower reverberation time, lower loudness and lower roughness values for the examined parameter ranges.
  • Doctoral Thesis
    Proteomic Analyses of Biological Samples by Using Different Mass Spectrometric Strategies
    (Izmir Institute of Technology, 2018) Dinç, Melilke; Yalçın, Talat
    The advent of soft ionization techniques MALDI and ESI have opened the doors of mass spectrometry to biological samples. Particularly protein research exploited this opportunity to the utmost that qualitative, quantitative, structural and distributional analyses of proteins have become achievable. Comparison of all expressed proteins belonging to two or more states is defined as differential proteomics and commonly performed either separating the proteins on a gel or separating the peptides in the mixture within a column. In this study, both of these methods were applied to a parasite that causes to the infectious disease, Leishmaniasis. Consequences of the disease become severe when parasite is multiplied in viscera rather than skin. Occurrence of different clinical manifestations is attributed to the variety in species however some species can cause to both such as L.infantum and L.tropica. The purpose of this study was to investigate this duality in L.infantum. Despite originating from two different species, cutaneous leishmaniasis isolates obtained from ten different patients exhibited considerably similar protein profiling on the gels however isolates belonging to five visceral leishmaniasis patients were discriminated from them with regards to protein abundances. Additionally, several differential proteins between cutaneous leishmaniasis and visceral leishmaniasis samples were determined by gel-free approach. Apart from that, another mass spectrometric strategy for the abovementioned distributional analysis namely mass spectrometry imaging was included in the last section. Herein, a method incorporating the application of enzyme with matrix was developed for easy sample preparation to on-tissue digestion and promising results were obtained for a start.
  • Doctoral Thesis
    Assessment of the Interventions Regarding Some Historical Mosques in Manisa Within the Frame of Conservation Values
    (Izmir Institute of Technology, 2018) Koşun, Suna; Turan, Mine
    In spite of the fact that General Directorate of Pious Foundations has will to provide budget for the restoration of waqf origined monuments, there are still contradictions in the related restoration applications. There is an increase in the number of restorations and decrease in the ratio between technical staff and project number. The aim of this study is to understand effects of changes on cultural asset values of waqf origined monuments which have sustained their authentic functions, evaluate the change in the values period by period, assess the current interventions, present restoration history, and propose principles for future interventions that will sustain cultural asset value. Historical mosques in Manisa and dated to different ages are selected as case studies: Haki Baba Mosque (1371), Göktaşlı Mosque (1630-31), Kabasakal Mosque (≤1841), Pazaryeri Mosque (1874) and Çarşı Mosque (1875). Mixed methods combining qualitative and quantitative techniques were used. In conclusion, picturesqueness value, spiritual value, virginity value, rarity value and age value of the monuments and their period by period changes are stated. Scale of intervention, delicacy of the monument and appropriateness of interventions in relation with principles such as reversibility, transmission of data, physical sustainability, and qualified design and workmanship were defined as the parameters that have direct impact on the sustaining of values. In addition, history of restoration of the studied mosques and principles for future interventions regarding similar structures are put forward.
  • Doctoral Thesis
    Rural-Ecological Commons: Case of Pastures in Izmir
    (Izmir Institute of Technology, 2018) Hazar, Dalya; Velibeyoğlu, Koray
    The main research interest of this study is to determine the conflicts on the pastures, which are defined as the rural-ecological commons that are important for biodiversity and ecological sustainability. The study focuses on the transformative impacts of enclosure and commodification processes on the pastures. Pastures are crucial entities especially within the four dimensions, rich biodiversity of flora and fauna, rural development, erosion prevention, and rural traditions. Case study areas are located at three districts of İzmir are examined within the context of the conflicts on the pastures in relation with the recent legal regulations, determination, delimitation and allocation processes, malpractices, climate change and the civil responses. The data gathered from the snowball interviews, in-depth interviews with professionals and village headmen, personal observations, commission reports and media analysis are evaluated by the content analysis to determine the main conflicts to generate the pasture dimensions for the eDPSIR causal network model. DPSIR is a facilitative organization tool, which aims to understand the cause and effect relationships in the environmental and social issues to eliminate the socio-environmental conflicts and to simplify the data transmission for better communication with the decision-makers, which also has a potential to be used during the EIA and SIA report processes. In this study, a pasture dimension set within an eDPSIR causal analysis model is constituted for re-positioning and re-evaluating pastures in the planning and design literatures, and the verification of the data enhanced by the methodological triangulation. The exploratory case study method is the research design strategy of the study. Outcomes of the study reveals the main land use conflicts on the pastures and the triggering drivers, pressures, states, impacts and the recommended responses. The study confirms that the ecological-sensitive planning can be a crucial tool in terms of protecting and improving the pastures.
  • Doctoral Thesis
    Dynamic Itemset Hiding Under Multiple Support Thresholds
    (Izmir Institute of Technology, 2018) Öztürk, Ahmet Cumhur; Ergenç Bostanoğlu, Belgin
    Data sharing is commonly performed between organizations for mutual benefits. However, if confidential knowledge is not hidden before the data is published it may pose threat to security and privacy. The privacy preserving frequent itemset mining is the process of hiding sensitive itemsets from being discovered with any frequent itemset mining algorithm. The privacy constraint of sensitive itemset hiding is sensitive threshold. If support of a given sensitive itemset is under the sensitive threshold, then this sensitive itemset is considered as non-interesting and hidden. One possible way of decreasing support of sensitive itemsets under predefined sensitive threshold is deleting items from a set of transaction. This type of frequent itemset sanitization is called distortion based frequent itemset hiding. The main focus of this thesis is to preserve sensitive itemsets with considering the multiple sensitive thresholds on both static and dynamic environments. Three different distortion based frequent itemset hiding algorithms proposed; Pseodo Graph Based Sanitization (PGBS), Itemset Oriented Pseudo Graph Based Sanitization (IPGBS) and DynamicPGBS are proposed. Both PGBS and IPGBS algorithms are designed for static environment and the DynamicPGBS algorithm is designed for the dynamic environment. The main objective of these three algorithms is to hide all sensitive itemsets with giving minimum distortion on non-sensitive knowledge and data in the resulting sanitized database.
  • Doctoral Thesis
    The Penetration Behavior of Repeated Hemisphere Core Sandwich Structures: an Experimental and Numerical Study
    (Izmir Institute of Technology, 2018) Turan, Ali Kıvanç; Taşdemirci, Alper; Güden, Mustafa
    In this study, penetration behavior of novel core structure consisting hemispherical and cylindrical parts was investigated. Core units were manufactured with deep drawing method in two thicknesses to have monolithic form without any sort of assembly method or element. Produced specimens were then subjected to penetration tests at low and intermediate velocities against blunt, conical and hemispherical tipped indenters using special fixtures and apparatuses on conventional testing equipment. Effect of heat treatment on penetration behavior was investigated to observe whether residual stresses arise from manufacturing process changes the penetration behavior. Confinement effects were studied experimentally with a special fixture, allowing tested specimen to be radially confined with other core units as in an armor structure. Finally, experimental work was finished by conducting a case study where core units were subjected to spherical projectile impact up to impact velocities of 180 m.s-1 in a composite sandwich structure. Results show that each indenter geometry showed unique deformation characteristics in testing of both core units and both of the core geometries were able to hold a steel spherical projectile with mass of 110 g without full perforation at impact velocity of 180 m.s-1. Details of experimental results were presented in each chapter. Study also included modeling parts where core units were numerically produced with residual stresses and strains and good correlation was noted where thickness was compared with actual measurements on core units. Test conducted on single core structure in as-received and heat-treated condition were also repeated in numerical environment, where numerical study exhibited good correlation on both forcedisplacement curves and deformation of core units with tests. Correlation achieved with experimental study has led into further investigations of strain rate and micro-inertia where behavior of core units was studied at numerical impact velocities of 300 m.s-1. Results show that both strain rate and micro-inertia increase the local maximums and average of force levels. Effect of strain rate and micro-inertia is clearly distinguished for a threshold displacement level where micro-inertia is further dominant on behavior.
  • Doctoral Thesis
    Kinematic Design and Analysis of Deployable Vault and Pseudo-Dome Structures Based on Origami Techniques
    (Izmir Institute of Technology, 2017) Karaveli Kartal, Andree Sonad; Korkmaz, Koray
    In recent years a need for more adaptable and flexible structures have been observed due to the changing spatial and functional needs. One of the solutions for an adaptable space in architecture is deployable structures. These kinds of structures provide flexible solutions to the functional and spatial necessities of an environment. There are different kinds of deployable structures such as bar and foldable plate structures, membrane, inflatable, cable/strut etc. This study presents a method of designing a pseudo-dome flat-foldable and deployable plate structure (rigid origami) based on origami patterns that have a polar rotation deployment axis. To achieve this objective, first a method of designing flat-foldable and linearly deployed barrel vault structures have been created by analyzing their geometrical properties. This analysis along with a workspace analysis provided knowledge on the geometrical relations between the cross-sections and deployment parameters. These relations allowed the design of a flat-foldable rigid origami structure based on the geometry of the cross-section using a pattern-generator. The method of using a pattern-generator to create an origami pattern has been modified to achieve a polar rotated deployable pseudo-dome structure. The design method allows the designer to calculate all the relevant parameters to create an origami structure by modifying three parameters for barrel vault foldable structures and two parameters for pseudo-dome structures. The created origami pattern is then transformed to a foldable deployable plate structure with the intended design requirements. The design processes for both design methods have been explained with case studies.
  • Doctoral Thesis
    Design and Synthesis of Rhodamine Based Fluorescent and Colorimetric Sensors for the Detection of Gold Ions
    (Izmir Institute of Technology, 2017) Karakuş, Erman; Emrullahoğlu, Mustafa
    The usage of chemosensors for the detection of heavy and transition metal ions is prevalent. Because these metal ions play crucial roles in living systems and have extremely toxic effects on the environment. Among these metal ions, gold species have interesting biological properties and uses. They play important roles in biological systems and often have significant impacts on human health. For instance, gold based drugs have long been used in the treatment of rheumatoid arthritis and other autoimmune diseases. In addition, gold nanoparticles function as carriers for drugs and gene delivery systems. Gold ions, on the other hand, are potentially toxic to humans. Because of their reactive nature, ionic gold species can interact with proteins, DNA and other biomolecules and disturb a series of cellular processes, leading to serious health problems. Detection of gold ions can be performed by spectroscopic methods such as atomic absorption and atomic emission spectroscopy and inductively-coupled plasma spectrometry that required complicated sample preparation steps, and sophisticated instrumentation. In contrast to these highly expensive and time consuming methods, fluorogenic or chromogenic methods can be good alternatives for the detection of these species that provides high analyte sensitivity and selectivity, visual simplicity, instantaneous response, as well as real time monitoring. The rhodamine scaffold is an ideal template for the construction of metal ion chemosensors because they have large molar extinction coefficient, long excitation and emission wavelengths, high fluorescence quantum yields, good water solubility, and the potential for colorimetric and turn-on fluorescent detection. In this thesis work, we focus on design and synthesis of novel rhodamine based molecules for the detection of gold ions. Moreover, we investigate the photophysical properties of synthesized molecules in the absence and presence of gold ions in both synthetic samples and living cells.