Investigation and development of the quality control of Al-Wheel rim production process

Thesis (Master)--Izmir Institute of Technology, Mechanical Engineering, Izmir, 2001Includes bibliographical references (leaves: 82-85)Text in English; Abstract: Turkish and Englishviii, 85 leavesWith the increasing use of aluminum wheels in automotive industry, the aluminum foundry industry had to focus on the quality and reliability of the products.To produce good quality aluminum cast wheels, defects must be minimized and the quality of each production step must be controlled.The main topic of this study was to investigate the production line of a big aluminum wheel foundry and improve the quality of production using quality control tools. The production parameter data and real-time x-ray inspection results have been collected. Parameters of the machines that are involved with the production and the results of testing equipment and thermal analyzer have been recorded.To obtain effective feedback during process, a proposed flow chart of the wheel production line was developed. The process parameters which have influences on the quality of wheel were determined by using Fishbone diagrams. According to the results of real-time radioscopic inspection, it was concluded that the main defects that occur on Al wheel are gas holes, porosity and shrinkage. The locations of the defects were identified with results of inspection and evaluated by using the charts. To eliminate these defects, some outstanding remedies are given in the flow chart of Al wheel production.A predicted equation between hydrogen content and density index of gas holes in molten metal was obtained by using the Least Square Method. Analysis of variance for the single factor showed that degassing time affects the hydrogen content in the molten metal. Finally, hydrogen content and the molten metal temperature relationship was investigated by a graphical method

The Mediating Effect of Green Human Resources Management on the Relationship between Organizational Sustainability and Innovative Behavior: An Application in Turkey

With globalization, it is required to support the innovative behaviors of employees as a driving force in order for organizations to increase their market share, provide competitive advantage and ensure organizational sustainability. The purpose of this study is to establish the intermediary role of green human resources management in the relationship between employees’ innovative behavior and organizational sustainability in the tourism sector. Data collection was achieved by conducting a survey of 615 hotel employees who work in accommodation establishments which are located in the city of Muğla (Turkey). In the scope of this study, validity and reliability analysis of the measurement scales were conducted and SmartPLS software was applied to implement a variance-based structural equation model. Within this framework, the research primarily discussed the variables among the relationship of organizational sustainability, IB, and green human resources management, and hypotheses were formed. A mediation test was conducted by selecting the bootstrap method in order to test the indirect effect that employees have on the perception of innovative behavior. The result of the study shows organizational sustainability has a significantly positive effect on innovative behavior and green human resources management, and also it emerged that green human resources management has a partial mediating effect on the success of organizational Sustainability on innovative behavior. Findings of the research state that whilst it is anticipated that the study can contribute to the literature theoretically and practically, a variety of proposals have been put forward for the benefit of future studies and operators to use

The Mediating Effect of Green Human Resources Management on the Relationship between Organizational Sustainability and Innovative Behavior: An Application in Turkey

With globalization, it is required to support the innovative behaviors of employees as a driving force in order for organizations to increase their market share, provide competitive advantage and ensure organizational sustainability. The purpose of this study is to establish the intermediary role of green human resources management in the relationship between employees’ innovative behavior and organizational sustainability in the tourism sector. Data collection was achieved by conducting a survey of 615 hotel employees who work in accommodation establishments which are located in the city of Muğla (Turkey). In the scope of this study, validity and reliability analysis of the measurement scales were conducted and SmartPLS software was applied to implement a variance-based structural equation model. Within this framework, the research primarily discussed the variables among the relationship of organizational sustainability, IB, and green human resources management, and hypotheses were formed. A mediation test was conducted by selecting the bootstrap method in order to test the indirect effect that employees have on the perception of innovative behavior. The result of the study shows organizational sustainability has a significantly positive effect on innovative behavior and green human resources management, and also it emerged that green human resources management has a partial mediating effect on the success of organizational Sustainability on innovative behavior. Findings of the research state that whilst it is anticipated that the study can contribute to the literature theoretically and practically, a variety of proposals have been put forward for the benefit of future studies and operators to use