01 December 2003
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In this thesis, methods used at present in occupational health and safety management are analyzed and a model safety management system is developed. History, development and recent occupational safety regulations in the United States of America and European Union are introduced to give a sight on this subject in developed countries. The suggested model is evaluated with work accident data taken from a company and hazard and risk analysis methods are used to investigate these accidents. Preventive measures to eliminate and reduce the consequences of these accidents are recommended. Finally a model safety management system which can be used in all types of industry is developed.
01 December 2010
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In this study, alternative solution of Kayraktepe Dam is investigated. Kayraktepe Dam was planned more than 30 years ago, but due to various reasons the construction could not be realized. In this study, an alternative feasible formulation was developed. Former Kayraktepe Dam was planned for multiple objectives: flood control, energy generation and water supply for irrigation. The newly developed formulation was designed to meet these objects as well.
Sol-gel Processing Of Organically Modified Ito Thin Films And Characterization Of Their Optoelectronic And Microstructural PropertiesKesim, Mehmet Tumerkan 01 August 2012 (has links) (PDF)
Indium tin oxide (ITO) thin films were formed on glass substrates by sol-gel method. Coating sols were prepared using indium chloride tetrahydrate (InCl3&bull / 4H2O) and tin-chloride pentahydrate (SnCl4&bull / 5H2O) stabilized in organic solvents (acetylacetone and ethanol). First attempt was to synthesize ITO thin films using standard/unmodified coating sols. The effect of calcination treatment in air (300 &ndash / 600 ° / C) and number of coating layer(s) (1, 4, 7 or 10) on optoelectronic properties (electrical conductivity and optical transparency), crystal structure and microstructure of ITO thin films were investigated. In addition, single-layer ITO thin films with optoelectronic properties comparable to multi-layered films were prepared by employing organically modified coating sols. Oxalic acid dihydrate (OAD) &ndash / a drying/microstructure control agent&ndash / addition to standard sol formulation was achieved. The rationale was to improve the optoelectronic properties of ITO films through enhancement in microstructure and chemical characteristics upon OAD addition. The effects of OAD content in the sol formulation and post-coating calcination treatment on electrical/optical properties of ITO films have been reported. Finally, the effects of post coating drying temperature (100 &ndash / 200 ° / C) and time (10 &ndash / 60 min) on optoelectronic and microstructural properties of OAD-modified ITO thin films were discussed. Thin films have been characterized by scanning electron microscopy (SEM), x-ray diffraction (XRD),x-ray photoelectron spectroscopy (XPS), ultraviolet-visible (UV-Vis) spectroscopy, fourier transform infrared (FTIR) spectroscopy, atomic force microscopy (AFM) and four-point probe measurement techniques. It was shown that film formation efficiency, surface coverage and homogeneity were all enhanced with OAD addition. OAD modification also leads to a significant improvement in electrical conductivity without affecting the film thickness (45± / 3 nm). Highly transparent (98 % transmittance in visible region) ITO thin films with a sheet resistance as low as 3.8± / 0.4 k&Omega / /sqr have been obtained by employing coating sols with optimized OAD amount (0.75 M). The optimum post-coating drying temperature (100 ° / C) and drying time (10 min) was also determined for 0.75 M OAD-modified ITO thin films.
Architecture And Disaster: A Holistic And Risk-based Building Inspection Professional Training Model For Practicing Architects In TurkeyOzden, Ali Tolga 01 February 2013 (has links) (PDF)
Interaction of human-induced factors with natural hazards results in diverse uncertainties and risks among the built environment. Impacts of disaster events experienced in Turkey have revealed the vulnerability of the social, economic, and physical environments along with the various insufficiencies of awareness, legislation, practice and building inspection concepts. The shift towards risk-based disasters policy among the international agenda influences the national disaster policies and efforts. Parallel to this, it is expected from practicing architects to enhance their capacities through disaster risk-based professional training programs in order to develop disaster resilient built environments. Building Inspection System (BIS) is one of the important components of risk reduction approach which ensures the safety of built environment and occupants. The effective BIS has important gaps and deficiencies within the administrative, legal, and technical structures which results in failure of building production process in Turkey. Among the other problems, the main concern related to the ongoing BIS is its fragmented and missing risk-based understanding. The critical analysis indicates the deficient points of administrative and technical issues within the BIS conducted with the certification and professional training model which are not consistent with shifting comprehensive disasters policy and risk-based understanding in Turkey, and proposing a holistic and risk-based certification and training model for practicing architects in Turkey which focuses on disaster resilient built environment development through the comparison of some international best-practiced training model examples with Turkish context. The proposed professional training model has a three-step knowledge acquisition levels (awareness-detailed knowledge-advanced knowledge) which aims to approach to the architectural built environment problems, develop awareness, build-up knowledge and support practice through the holistic disaster risk reduction understanding, and in addition to attend on the complementary and supportive strategies (such as building and environment, building and material, structure and construction contexts) between related issues.
01 January 2005
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This thesis is an architectural study surveying on miniature parks and miniature models exhibited in them and particularly focuses on Miniaturk - the first miniature park of Turkey- located in Istanbul. It is established as an environment containing a group of miniature models of buildings and landscapes, which display the variety, and richness of the cultural tradition of the previous and contemporary Anatolian civilizations, and especially Ottoman grandeur. In this study, it is argued that Miniaturk stands as a hybrid category between a museum, a public park and entertainment centre. Miniaturk is also conceived as an architectural environment providing a possible ground to discuss the conceptions, misconceptions and presuppositions about architecture in the popular realm and in the professional and disciplinary framework. Thereby, Miniaturk is investigated through the processes of its production including the initial design idea and all the stages of its construction. This study also tries to discuss the miniature models from different points of view. Whether they are considered as tools of architectural representation or not by the professionals, the popularity and the communicative advantage of these models can be used to arouse interest in the cultural and historical heritage as well as the contemporary architecture. The daily life of man on the street is strictly connected with architecture / therefore Miniaturk requires recognition as an environment for realization of these connections and relations.
01 May 2005
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Pushover analysis involves certain approximations and simplifications that some amount of variation is always expected to exist in seismic demand prediction of pushover analysis. In literature, some improved pushover procedures have been proposed to overcome the certain limitations of traditional pushover procedures. The effects and the accuracy of invariant lateral load patterns utilised in pushover analysis to predict the behavior imposed on the structure due to randomly selected individual ground motions causing elastic and various levels of nonlinear response were evaluated in this study. For this purpose, pushover analyses using various invariant lateral load patterns and Modal Pushover Analysis were performed on reinforced concrete and steel moment resisting frames covering a broad range of fundamental periods. Certain response parameters predicted by each pushover procedure were compared with the ' / exact' / results obtained from nonlinear dynamic analysis. The primary observations from the study showed that the accuracy of the pushover results depends strongly on the load path, properties of the structure and the characteristics of the ground motion. Pushover analyses were performed by both DRAIN-2DX and SAP2000. Similar pushover results were obtained from the two different softwares employed in the study provided that similar approach is used in modeling the nonlinear properties of members as well as their structural features. The accuracy of approximate procedures utilised to estimate target displacement was also studied on frame structures. The accuracy of the predictions was observed to depend on the approximations involved in the theory of the procedures, structural properties and ground motion characteristics.
01 August 2005
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Mobile robotics has become a rapidly developing field of interdisciplinary research within robotics. This promising field has attracted the attention of academicy, industry, several government agencies. Currently from security to personal service mobile robots are being used in a variety of tasks. The use of such robots is expected to only increase in the near future. In this study, it is aimed to design and manufacture a versatile robot base. This base is aimed to be the main driving unit for various applications performed both indoors and outdoors ranging from personal service and assistance to military applications. The study does not attempt to individually address any specific application, indeed it is aimed to shape up a robotic module that can be used in a wide range of application on different terrain with proper modification. The robot base is specifically designed for mixed terrain applications, yet this study attempts to provide some guidelines to help robot designers. The manufactured robot base is tested with tracks, wheels, and with both tracks and wheels, results are provided as guidelines to robot designers. Last but no the least, this study aims to obtain the know-how of building functional and flexible robots in Turkey by facilitating local resources as much as possible.
The Contribution Of Intellectual Property Rights Obtained By Small And Medium-sized Enterprises To Economic And Technological Development: Policies To Be ImplementedSozer, Sebnem F. 01 May 2006 (has links) (PDF)
This thesis analyses the utilization of intellectual property rights (IPRs) by small and medium-sized enterprises (SMEs), their contribution to economic and technological development and policies to be implemented for the SMEs to make more use of the system in order to reach a desired level of growth. Small and medium-scaled enterprises constitute more than 90 % of all firms almost all over the world and a substantial proportion of employment and turnover. This fact bares the necessity for the SMEs to make more use of the intellectual property rights system which is one of the components of innovation and technological growth, in order to achieve the desired level of economic and technological development. This paper discusses the existing and possible contribution of the IPRs obtained by SMEs to economic and technological development and the policies to be implemented in order to encourage intensive utilization of the system by the SMEs. The results of surveys previously carried out both in Turkey and abroad are incorporated within the results of a survey which was organized in the context of this thesis among 86 enterprises in 12 organized industrial zones all over Turkey. The latter survey measures the IPR utilization of the SMEs and the reasons behind under-utilization. Among the firms studied, 60 % of them are R& / D performers, 34 % have a distinct R& / D department while 56 % of them reported to have developed a new product, process or design. However only one third of these innovative firms have had an IP application and the percentage was even lower with IPR supports / only 2.3 % of the firms applied for IPR supports. The main reason for this underutilization of both IPRs and IPR supports was found as lack of awareness. Policy proposals were tried to be put forward depending on the findings of the survey and raising awareness was defined as the most important measure to be taken.
01 September 2006
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The aim of this thesis is to propose a safety management framework for construction companies. A literature review was performed to identify significant factors that would improve safety performance. Two management tools are used within the scope of this study: the balanced scorecard and quality function deployment (QFD). Strategic goals are established for each perspective of the balanced scorecard: financial and cultural, employee, process and learning and growth. Afterwards, a questionnaire was prepared using the QFD approach. The goals in the financial and cultural perspective were defined as the needs of the organization related to safety (&ldquo / customer requirements&rdquo / in the original QFD approach). The goals in the remaining perspectives formed the actions that the organization could do to achieve its needs (&ldquo / product how&rsquo / s&rdquo / in the original QFD). Results of the questionnaire were used to form the final strategic goals in balanced scorecard. Safety performance measures and initiatives were defined for the accomplishment of the goals in the balanced scorecard.
Role Of Hydrology, Nutrients And Fish Predation In Determining The Ecology Of A System Of Shallow LakesOzen, Arda 01 September 2006 (has links) (PDF)
In this study, the hydrology and physical, chemical and biological variables of a shallow lake system including the Lakes Mogan and Eymir between 1997-2005 were evaluated. In Lake Eymir, a biomanipulation study was conducted between August, 1998 &ndash / December, 1999. Upon biomanipulation, Lake Eymir shifted to clearwater state with submerged vegetation domination during 2000-2003. However, in 2004, the lake shifted back to algae-dominated turbid state since the buffer mechanisms provided by submerged plants were absent. In the summer of 2005, fish kills were observed due to algal bloom. However, due to increasing hydraulic residence time in the lake, internal processes became more important for nutrients. Lake Mogan faces seasonal and interannual water level fluctuations. During the low water levels experienced in 2001 and 2005, which coincided with the high hydraulic residence times, the in-lake phosphorus amount was controlled by internal processes rather than external loading. Moreover, results revealed that hydrology and submerged plants were important in the ecology of Lake Mogan. Furthermore, the relationship between the phytoplankton, zooplankton and the environment in Lakes Eymir and Mogan, which was predicted via Canonical Corresponding Analysis, revealed that nutrients and water transparency were both important for plankton communities. Both the top-down and bottom up effects were valid in Lake Eymir, while only the bottom-up effect and submerged plants were important for Lake Mogan. Finally, the present study provided a good example for the submerged plant dominated clearwater state triggered by biomanipulation, and the impact of hydrology on the ecology of shallow lakes.
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