392 research outputs found
Gum Arabic : the golden tears of the acacia tree /
No full textGum Arabic has been seen as a symbol of the 'noble Orient' and later as a symbol of trouble. It is the hardened sap of varieties of acacia trees which grow exclusively in the Sahel, an area stretching across the African continent just south of the Sahara. From the time of the Crusades, when Europeans purchased it in Arab countries, it has played an ever-growing role in the global economy. It is now a common ingredient in foods, sodas, and cosmetics. Combining cultural history with travel writing, Dorrit van Dalen follows the fascinating history and shifting meanings assigned to gum Arabic from Shakespeare to Bin Laden and from the Industrial Revolution to a veteran of a recent coup d'état in Chad. She shows that both Western and African civilisations would not be the same without these tears of the acacia.Title from publisher's bibliographic system (viewed on 22 Nov 2022).Gum Arabic has been seen as a symbol of the 'noble Orient' and later as a symbol of trouble. It is the hardened sap of varieties of acacia trees which grow exclusively in the Sahel, an area stretching across the African continent just south of the Sahara. From the time of the Crusades, when Europeans purchased it in Arab countries, it has played an ever-growing role in the global economy. It is now a common ingredient in foods, sodas, and cosmetics. Combining cultural history with travel writing, Dorrit van Dalen follows the fascinating history and shifting meanings assigned to gum Arabic from Shakespeare to Bin Laden and from the Industrial Revolution to a veteran of a recent coup d'état in Chad. She shows that both Western and African civilisations would not be the same without these tears of the acacia
Concrete Flow in Diaphragm Wall Panels: A Full-Scale In-Situ Test
No full textFlow processes, taking place during the concreting of diaphragm wall panels (D-wall panels), are of great importance for the quality of the wall. During this phase, the bentonite, present in the excavated trench, should be completely replaced by concrete in a controlled way. In literature several cases are described in which this process resulted in bentonite inclusions in the panel. These inclusions often lead to severe problems, like leakages, for the building pit to be excavated within the diaphragm wall panels. Beside the risks for the building pit, leakages caused by bentonite inclusions can also have large consequences for nearby constructions. In this article, set up and results of a full-scale diaphragm wall test are described. Conclusions are drawn with regard to the influence of several parameters on the flow process and subsequently on the quality of the wall and the risk on bentonite inclusions
Voorlanden voor hoogwaterbescherming
No full textIn Nederland zijn honderden kilometers aan waterkering toe aan versterking. De aanleg van begroeide vooroevers, zoals schorren en kwelders, is een mogelijkheid om de belasting op dijken te verminderen. Daarmee dalen overstromingsrisico’s en gaan natuurwaarden omhoog.Accepted Author ManuscriptCoastal EngineeringHydraulic Structures and Flood RiskPolicy Analysi
An Index of Authors to A Survey of the Scientific Manuscripts in the Egyptian National Library
No full textIn 1986, David A. King published an English survey of his Arabic catalogue of the scientific manuscripts in the Egyptian National Library in Cairo, which had appeared in two large volumes in 1981 and 1986. This survey is arranged chronologically by author within a number of geographical regions. Although a list of all authors is found at the beginning of thework, no alphabetical index of authors is included. On the occasion of King’s retirement, and with an eye on the recent renewed interest in the bio-bibliography of Islamic scholars, this article presents such an index, generated from a computer database by Benno van Dalen
Optimal international debt and endogenous time preference in a demographically divided world.
No full textL.E.J. Brouwer, fifty years later
No full textEditorialGreen Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public
Grondige beschryvinge van de edele ende ridderlijcke scherm- ofte wapen-konste : noyt diergelijcke in dese nederduytse tale in den druck uytgegaen, met veele schoone kopere figueren verciert /
No full textSignatures: *-2*⁴ A-V⁴.Frontispiece port. of author, dated 1671.Imprint from printed slip mounted on t.p., cancelling that of the 1st ed.: Gedruckt vor den Autheur, Tot Leyden, By Abraham Verhoef, Boekdrucker, ao. 1671.Mode of access: Internet.Initials BvR on front flyleaf. John Landwehr's printed label on front pastedown.Binding: vellum. Author & title written at head of spine
Modelling of the dynamic pressuremeter test in porous soil using analytical and numerical methods
No full textThe pressuremeter test is one of the most popular in-situ soil testing methods. Developed in the 1950s in France, the test has evolved throughout the past decades and was built into a cone resulting in a cone pressuremeter device (CPM). A proposed extension of the test involves time dependent pressurisation of the device resulting in wave propagation in the soil. Therefore, the dynamic behaviour can be determined. The possible applications of this extension include the response of an offshore monopole to dynamic loading and liquefaction analysis. The present research work deals with the modelling of the dynamic version of the pressuremeter test. The soil where the test was assumed to be conducted was saturated sand. Therefore, it was modelled as a porous medium, following the poroelastic theory by Biot (1956). The latter was based on the consolidation theory (Biot, 1941).Civil Engineering and GeosciencesGeoscience & Engineerin
The Quest for Citations: Drivers of Article Impact
No full textWhy do some articles become building blocks for future scholars, while many others remain unnoticed? We aim to answer this question by contrasting, synthesizing and simultaneously testing three scientometric perspectives – universalism, social constructivism and presentation – on the influence of article and author characteristics on article citations. To do so, we study all articles published in a sample of five major journals in marketing from 1990 to 2002 that are central to the discipline. We count the number of citations each of these articles has received and regress this count on an extensive set of characteristics of the article (i.e. article quality, article domain, title length, the use of attention grabbers and expositional clarity), and the author (i.e. author visibility and author personal promotion). We find that the number of citations an article in the marketing discipline receives, depends upon “what one says†(quality and domain), on “who says it†(author visibility and personal promotion) and not so much on “how one says it†(title length, the use of attention grabbers, and expositional clarity). Our insights contribute to the marketing literature and are relevant to scientific stakeholders, such as the management of scientific journals and individual academic scholars, as they strive to maximize citations. They are also relevant to marketing practitioners. They inform practitioners on characteristics of the academic journals in marketing and their relevance to decisions they face. On the other hand, they also raise challenges towards making our journals accessible and relevant to marketing practitioners: (1) authors visible to academics are not necessarily visible to practitioners; (2) the readability of an article may hurt academic credibility and impact, while it may be instrumental in influencing practitioners; (3) it remains questionable whether articles that academics assess to be of high quality are also managerially relevant.Impact;Citation Analysis;Referencing;Scientometrics;Cite
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