1,721,020 research outputs found
Gus W. Van Beek (éd.), The Scholarship of William Albright. An Appraisal. (Papers delivered at the Symposium Homage to William Foxwell Albright. The American Friends of the Israel Exploration Society, Rockville, Maryland, 1984), Scholars Press, Atlanta, 1989
No full textCaquot André. Gus W. Van Beek (éd.), The Scholarship of William Albright. An Appraisal. (Papers delivered at the Symposium Homage to William Foxwell Albright. The American Friends of the Israel Exploration Society, Rockville, Maryland, 1984), Scholars Press, Atlanta, 1989. In: Syria. Tome 67 fascicule 3-4, 1990. pp. 768-769
Combined, Modulation Enhanced X-ray Powder Diffraction and Raman Spectroscopic Study of Structural Transitions in the Spin Crossover Material [Fe(Htrz)2(trz)](BF4)
No full textIn situ simultaneous Raman/high-resolution X-ray powder diffraction study of transformations occurring in materials at non-ambient conditions
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The Smithsonian Institution Excavation at Tell Jemmeh, Israel, 1970–1990
No full textThis monograph describes the results of the archaeological excavation at the site of Tell Jemmeh, Israel, undertaken by the Smithsonian Institution and directed by Gus W. Van Beek during the years 1970–1990. All the artifacts from the excavations were shipped from Israel to Washington, D.C., and have been restored, studied, and analyzed in the National Museum of Natural History for the past four decades. The site is a strategic and large mound located near Gaza and the Mediterranean coast. It was inhabitedcontinuously for at least 1,400 years during the Middle and Late Bronze Age, the Iron Age, and the Persian period. The highlights of this excavation are the findings of a large and affluent courtyard house from the Late Bronze Age, a sophisticated well-preserved pottery kiln from the early Iron Age, a complex of Assyrian related administrative buildings during the late Iron Age, and a complete granary of the Persian period. This is a detailed and final report on all of the excavation results, including the architectural remains, stratigraphy, pottery, and other finds. In addition, several more detailed and focused studies of certain aspects of the site’s material include (among others) chapters on imported, decorated, Philistine, Assyrian-style and Greek pottery and chapters on figurines, sealings, jewelry, amulets, scarabs, cylinder seals, flint, coins, ostraca, and fauna. The volume is richly illustrated with nearly 1,000 figures showing field photographs, plans, sections, and drawings and photographs of artifacts. The significance of the results is summarized and discussed in the final chapter
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Development of a Fast and Clean Intercalation Method for Organic Molecules into Layered Double Hydroxides
No full textA new mechanochemical method for the fast and clean preparation of exchanged layered double hydroxides (LDHs) was designed and tested on compounds with different chemical features, to assess its feasibility and applicability, to optimize yields and reaction speeds, and to identify its potential and limitations. Thanks to the simplicity and speed of the proposed method, we were able to upscale the method and produce several hundreds of grams of exchanged hydrotalcite. Moreover, fast in situ X-ray powder diffraction measurements, performed using synchrotron radiation, allowed us to unravel the mechanism and kinetics of the process. This showed that it is possible to carry out the complete reaction in less than 1000 s instead of days. The chosen organic guests were 3-carboxy coumarin and, given their importance, a series of nonsteroidal anti-inflammatory drugs with different pK(a) values and steric hindrance, namely, ketoprofen, flurbiprofen, ibuprofen, indomethacin, and tiaprofenic acid. The method has been applied to different classes of compounds to characterize the reaction in terms of speed, yield, and applicability. The characterization of the obtained nanocomposites, carried out by crystallographic and microscopic techniques, revealed that the synthesis yields are comparable to that of standard methods, but with enormous time, solvent, and energy saving advantages. Moreover, in situ diffraction experiments allowed us to shed some light on the kinetics of the intercalation process with subsecond resolution and to determine the parameters affecting the reaction. Steric hindrance of the molecule proved to be the most relevant parameter to determine the applicability of this method
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