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11.
The architectural remains at Pasargadae were built of three different stones classified according to their colors (beige, dark-gray, and green-gray). The stones show different macroscopic features, such as texture and decay patterns. The aim of this study is to identify the composition of the stones and to evaluate the main decay factors through petrographic studies in order to make conservation decisions more compatible. Petrochemical analyses show that the stones are in fact limestones with different features; two of them have a compact texture (beige and dark-gray stones), while the third has a fairly porous structure (green-gray stone). In some beige stone samples, dolomite was identified. Despite the fact that the presence of salt is a possible decay factor, X-ray diffraction analysis did not report any salt. According to SEM observations, the main reasons for decay in dark-gray and green-gray stones are the dissolution of calcite crystals and the swelling of clay minerals. The main decay factor in the beige stone, by contrast, is dissolution induced by microorganism activity. However, a patina formed by lichens on the surface of the beige stone, although aesthetically detrimental, protects it against further decay.  相似文献   
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ABSTRACT

A displacement-based (DB) assessment procedure was used to predict the results of shake table testing of two unreinforced masonry buildings, one made of clay bricks and the other of stone masonry. The simple buildings were subject to an acceleration history, with the maximum acceleration incrementally increased until a collapse mechanism formed. Using the test data, the accuracy and limitations of a displacement-based procedure to predict the maximum building displacements are studied. In particular, the displacement demand was calculated using the displacement response spectrum corresponding to the actual shake table earthquake motion that caused wall collapse (or near collapse). This approach was found to give displacements in reasonable agreement with the wall’s displacement capacity.  相似文献   
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The effects of diaphragm flexibility on the seismic response of low-rise unreinforced masonry buildings are examined using one-way stiffness- and strength-eccentric single-story systems subjected to unidirectional ground excitation. A wide range of diaphragm stiffnesses are considered. Results show that diaphragm flexibility can induce different effects depending on the configuration of the system and the level of diaphragm flexibility. When diaphragm is relatively stiff, amplified displacement demands can be imposed on the flexible side of the structure. When diaphragm is relatively flexible, peak displacements of in-plane loaded walls generally reduce. A diaphragm classification is developed to capture these salient effects.  相似文献   
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The first Iranian to study medicine abroad was sent to Britain by the Iranian government in 1811, during the early decades of the Qajar period (1796–1925). The second student was sent to France in 1815, along with four other students. Another group of five students, including the third student of medicine, was sent to France in 1845. Forty-two others, including five medical students, were dispatched to France in 1858. Most members of the latter group were among the first graduates of Tehran Dar al-Fonun (House of Techniques) School. Then, in 1928, during Reza Shah Pahlavi's reign (1925–41), a special act was passed by the Iranian parliament (Majlis) according to which the Ministry of Education would send 100 students abroad annually for higher education at the government's expense. The practice was suspended in 1935 with the advent of the Second World War. Between 1928 and 1935, a total of 640 students, including 125 medical students, were sent abroad. The majority of the medical students (84 percent) were sent to France. Most of these medical graduates returned to Iran and in subsequent years played a significant role in further propagation of modern medical knowledge in the country. The paper presents a brief historical account of the conditions of public health and medical education between 1811 and 1935 as well as biographical sketches of some of the best-known or most influential medical figures among these graduates.  相似文献   
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Reviews     
Religions of the Silk Road: Overland Trade and Cultural Exchange from Antiquity to the Fifteenth Century , Richard C. Foltz, New York: St. Martin's Press, 1999. 186 pp., ISBN 0–312–21408–1.

Greek Thought, Arabic Culture: The Graeco‐Arabic Translation Movement in Baghdad and Early cAbbasid Society (2nd‐4th/8th‐10th centuries) , by Dimitri Gutas, London and New York: Routledge, 1998.

A Short History of the Ismacilis. Traditions of a Muslim community , Farhad Daftary, Edinburgh: Edinburgh University Press, 1998, viii + 248 pp. (Islamic Surveys).

Napoleon and Persia: Franco‐Persian Relations under the First Empire , Iradj Amini, Washington, D.C.: Mage Publishers, 1999, 228 pp.

Napoléon et la Perse: Les relations franco‐persanes sous le Premier Empire , Iradj Amini, Paris: Fondation Napoléon, 1995, 254 pp.

A Literary History of Persia , Edward G. Browne, 4 volumes, reprinted Iran‐books / Ibex Publishers, Bethesda 1997.

The Divan‐i Hafiz , H. Wilberforce‐Clarke, reprinted Iranbooks/Ibex Publishers, Bethesda, 1998.

Modern Persian Prose Literature , Hassan Kamshad, reprinted Iranbooks/Ibex Publishers, Bethesda, 1996.

Borrowed Ware: Medieval Persian Epigrams ,Dick Davis, trans., Washington, D.C.: Mage, 1997, 203 pp.

Asemun Rismun , Iraj Pezeshkzad, Bethesda, Maryland: Iranbooks,1997, x +300 pp., includes biographical reference and index, ISBN 0–936347–79–1.

La belle rivale de Farah et les jeux du destin , Anna‐Lisa Vafa, Paris: Les Editions la Bruyère, 1998, 103 pp.

The Arrest of Hoveyda: Stories of the Iranian Revolution , Saïdeh Pakravan, Costa Mesa, California: Blind Owl Press (an imprint of Mazda Publishers), 1998, 134 pp.

A World Between: Poems, Short Stories, and Essays by Iranian Americans , edited by Persis M. Karim and Mohammad Mehdi Khorrami, New York: George Braziller, 1999, xxvii + 254 pp.

The Sands of Oxus: Boyhood Reminiscences of Sadriddin Aini , trans., with an introduction, by John R. Perry and Rachel Lehr, Costa Mesa: Mazda Publishers, 1998, 275 pp., illus., maps, ISBN 1–56859–078–4.

Tajikistan:The Trials of Independence , eds. Mohammad‐Reza Djalili, Frédéric Grare, and Shirin Akiner, Richmond (UK): Curzon Press, 1998.

Central Asia meets the Middle East , David Menashri, ed., London & Portland, OR.: Frank Cass & Co Ltd., 1998, ISBN 0–7146–4600–8 (cloth), 9–7146–4129–4 (paper), xiii + 240 pp., map, index.

Arab‐Iranian Relations , Khair El‐Din Haseeb (ed.), Beirut/London: Centre for Arab Unity Studies/Brítish Academic Press, 1998, 564 pp., $59.50 (hardcover).

The Armenians of Iran: The Paradoxical Role of a Minority in a Dominant Culture , ed. Cosroe Chaqueri, Cambridge: Harvard Center for Middle Eastern Studies, 1998, 408 pp., photographs.

Women and the Political Process in Twentieth‐Century Iran , Parvin Paidar, Cambridge: Cambridge University Press, 1995, xvi+401 pp.

Secularization of Iran: A Doomed Failure? The New Middle Class and the Making of Modern Iran , Azadeh Kian‐Thiébault, Paris, France: Diffusion Peet‐ers, Travaux et mémoires de l'Institut d'études iraniennes, numéro 3, 1998, 296 pps.

An Islamic Utopian: a political biography of Ali Sharicati , Ali Rahnema. London and New York: I.B. Tauris (St. Martin's Press), 1998. xiii, 418 pp., bibliography, index, ISBN 1–86064–118–0.

Persian Painting ,Sheila R. Canby, New York: Thames and Hudson, 1993, 128 pp., 43 color and 44 black‐and‐white illustrations, map, bibliography, index, ISBN 0–500–27730–3.

Early Persian tilework: the medieval flowering of kashi , Douglas Pickett, Madison, Teaneck, and London: Fairleigh Dickinson University Press and Associated University Presses, 1997, 211 pp.

The Persian Garden: Echoes of Paradise , Mehdi Khansari, M. Reza Moghtader, and Minouch Yavari, Washington, D.C.: Mage Publishers, 1998, 169 pp.  相似文献   

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