Dept. of Fine Arts - Ph.D. / Sc.D.
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Item Open Access Tunisian tiles: Ottoman inspiration from the 16th to the 19th centuries(Bilkent University, 1995) Kura, NerminThe span of time stretching between the end of the 16th and the end of the 19th centuries marks the period in which Tunisia was included within the boundaries of the Ottoman Empire. The tile ateliers which flourished in Tunisia from the end of the 16th century onwards produced a large number of revetments not only for local use but also for exportation to neighboring countries such as Algeria, Libya and Egypt. As a result of the exigencies of the dynamic social and cultural mutations peculiar to this epoque, a style composed of diverse cross cultural influences was elaborated by Tunisian tile-makers responding to the new vogue of the times. The aim of this research is to elucidate the Ottoman inspiration in a group of Tunisian tiles manufactured in this era through an analysis of the use of motifs, patterns, surface arrangements and iconographical aspects elaborated in ceramic workshops. This research will help to understand the role of the Ottoman factor in the development of a stylistic synthesis in the North African Mediterranean context and also adds a link to studies dealing with the evolution of Ottoman provincial styles.Item Open Access A new method in object lighting : using surface chromaticity coordinates as a led-based lighting tool in museums(Bilkent University, 2007) Dikel, Ekrem ErhanIn contemporary museum lighting, the common practice is to choose light sources with recommended Color Rendering Indices (CRI) and Color Temperatures (CT) that do not emit harmful wavelengths: ultraviolet and infrared. In addition to CRI and CT, the commonly disregarded component of each light source, the Chromaticity Coordinates (CC), do not exist in any guidelines that are intended to be used by museum lighting designers and curators. This thesis aims to create a guideline for the museum lighting designers by proposing a new lighting method based on the relation between the surface CC of the museum objects and the CC of the light sources that are proposed to be their illuminators. For this reason, an experiment was conducted by using the Light-Emitting Diodes (LEDs) and computerized lighting controlled systems to test the validity of the proposed method. In the study, the appearances of the colored objects under a D65 reference light source were evaluated by comparing the created light source with their CC values and three other LED light sources with CT of 3000, 4200, and 6500 Kelvin that are mainly used in the museum lighting design applications. The results of the experiment showed that subjects preferred the appearance of the objects under lights that have same CC as the object. This thesis contributes to the museum lighting literature by creating the basis for a guideline for choosing and creating unique light sources for objects, by using their own physical properties.