Scopus İndekslenen Yayınlar

Permanent URI for this collectionhttps://hdl.handle.net/20.500.12597/3197

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    Development of a standard laboratory testing method for thermal diffusivity measurements of building walls: Combined use of Infrared thermography and guarded hot box
    (Gazi Universitesi, 2024) Tuğla, R.K.; Tavukçuoğlu, A.; Yazıcıoğlu, S.
    The thermal diffusivity value of a building wall can be calculated theoretically by using the thermophysical properties of its materials listed in standards and literature. In these lists, building materials in the same category can be defined by different thermal properties; therefore, the theoretically-calculated thermal diffusivity values can be misleading. In this study, an experimental setup was developed that can directly measure the thermal diffusivity (α, m2/s) value of building walls by the combined use of infrared thermography and guarded hot box methods. A 19cm-thick wall sample made of lightweight concrete block with pumice aggregate and mortar was prepared; this wall is positioned between a controlled warm ambient on its one side and a cold ambient on the other side, where its surfaces were monitored by sequential IR imaging. The thermal diffusivity value of the sample wall was calculated by using the data showing temperature change versus time and the relevant theoretical equation. The reference thermal diffusivity value (αREF) of the sample wall, calculated by using thermal properties measured by standard laboratory tests, is 3.40x10-7 m2/s. The thermal diffusivity (αIRT) of the same wall, measured with the proposed IRT-GHB experimental setup, is 3.38x10-7 m2/s. The value measured with that new setup is similar to the reference thermal diffusivity value. The results show that the new experimental setup can directly measure the thermal diffusivity of a wall. Compared to the existing ones, the proposed experimental setup presents a measurement technique that saves time and sets the basis of a scientific, practical, and more economical analytical method.
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    The Perception of Africa in Ottoman Magazines of the 2nd Constitutional Period
    (Abidin Temizer, 2024) Yilmaz, M.
    The Ottoman Empire resided in the African continent for nearly 400 years. The Ottoman Empire, which extended its borders to the southern shores of the Mediterranean and made its influence felt from there to the interior of Africa, did not encounter any significant difficulties because this geography was largely Muslim. Africans also respected the Ottoman sultans, who were representatives of the caliphate. However, with the geographical discoveries that started in Western Europe, the previously unknown African geography became known to Westerners. Within the scope of Western Europe's economic activities which would lead to imperialism, the African continent constituted a source of human and underground wealth to be exploited. The imperial rise of the West progressed in parallel with the exploitation of the continent of Africa. The power that could resist the imperial states in Africa was the Ottoman Empire. Therefore, these states fought against the Ottoman Empire to conquer Africa. By 1911, Tripoli, which was the last Ottoman territory in Africa, was attacked by Italy and the Ottoman Empire was forced to retreat from Africa. During such a period, magazines published in the Ottoman Empire drew attention to the developments in Africa. Islamic motifs were used as much as possible to increase the motivation of the people in the ongoing Tripoli War. These magazines focused on how imperialism could be resisted by emphasizing the political, economic and religious goals of the imperialist Western states on the continent. Issues requiring self-criticism about the Ottoman Empire and the Islamic world in general were also mentioned. This study examines the interest of the Ottoman Empire in Africa between 1908 and 1914 through the magazines of the period.