2,913 research outputs found
Design metrics for evaluating the propulsive efficiency of future ships
No full textThere is an increasing need for the ship design process to take account of environmental issues such as the emission of greenhouse gases and the likely extension of a carbon dioxide charging mechanism to international shipping. These issues, together with the need for economic viability, provide further incentives to improve the efficiency of propulsion of ships. The main components of powering are firstly reviewed. Individual components and other power saving devices are identified which should contribute to improvements in the overall efficiency of propulsion. Suitable design metrics and procedures, taking into account economic and environmental factors, are recommended for the design of future ships
Brief note: some observations on oscillating tangential forces and wear in general plane contacts
No full textFor general plane contact of elastically similar materials, including cases where there are multiple regions of contact, general properties of the partial slip solution for conditions of constant normal force and monotonically increasing shearing force have been found recently by the first author. An extension is given here to cover the unloading and cyclic loading cases. Further, it is shown that, if the tangential load varies between two fixed limits, the region of stick does not change, even if relative microslip causes wear, changing continuously the profile of the indenter. The contact area will change, but wear will not enter the original region of adhesion. The theoretical limit to which wear will eventually, asymptotically proceed is established, viz. almost complete contact over what is the initial stick zone, although it may, in practice, take a long time to reach this state
Караимская коллекция из фондов Центрального музея Тавриды / Karaite Collection from the Funds of the Central Museum of Taurida
No full textThe objects of study are artifacts from the Karaite collection, which is kept in the funds of the State Budgetary Institution of the Republic of Crimea the Central Museum of Taurida. The history of its formation is also studied. The collection includes a large number of exhibits directly related to the history of the Karaites of the Crimea. Among the items of this collection are especially interesting manuscripts, elements of decoration of the Karaite kenases, religious objects, jewelry and household products, as well as rare photographs and documents. Materials stored in other museum depositories in the Republic of Crimea were also taken into account. The ethnographic and historical and cultural value of the Karaite collection’s items has been demonstrated. Unfortunately, some of the artifacts previously listed in the collection were lost due to the anti-religious policy of the Soviet state as well as during the Great Patriotic War
Karaites in the Ulus Jochi era and in the Crimean Khanate: The question of the origin of Karaite communities on the Crimean peninsula
No full textResearch objectives: An analysis and generalization of materials on the history of the emergence of Karaite communities on the territory of the Crimean peninsula in the era of the Ulus of Jochi and the Crimean Khanate.
Research materials: As a result of comparing published materials on the history of the Crimean Karaites, data from archaeological and epigraphic studies, as well as in the process of studying the funds of the Russian State Historical Archive (RSHA, St. Petersburg) and the State Archive of the Republic of Crimea (SARC, Simferopol), information was analyzed related to the problem of the emergence of Karaite communities on the territory of Crimea in the era of Ulus Jochi and the Crimean Khanate.
Results and scientific novelty: Many episodes in the history of the Crimean Karaites still remain outside the field of view of researchers. There is also the problem of interpretation of sources. In particular, this concerns the controversy about the origin of the Crimean Karaites and the time of their appearance on the territory of the Crimean peninsula, a process that had been going on for more than 100 years with the discussion sometimes going beyond scientific argumentation.
The stages of the scientific study of the past of the Crimean Karaites are characterized by different levels of intensity, as well as large variety of methods and approaches used. Interest in this problem first arose among representatives of Russian academic circles in the first half of the 19th century. The Russian administration became interested in the history of the Karaites in part because the ideas of the European Enlightenment, which largely determined the policy of the Russian government in a number of key areas, implied the spread of Russian culture and education to the “Asian peoples.” In relation to the Karaites, Krymchaks, and Ashkenazi Jews, the Russian government adopted laws and regulations, in accordance with which the Karaites were able to legislatively strengthen their legal status. The Russian government, however, used restrictive measures by pursuing a discriminatory anti-Jewish policy against the Jewish population. The Karaites managed to get the authorities to recognize them as a community that differed from the Rabbanites while they received various legal and economic preferences. The same time period marked the onset of the large-scale activity of the famous collector of Jewish antiquities, Abraham Firkowicz, who initiated the creation of an extensive collection of manuscripts related to the history of Jewish communities, including in the Crimean peninsula.
Based on the materials presented, it was concluded that the Karaite community could have appeared in the Crimea not earlier than the second half of the 13th century. Active resettlement of Karaites to the Crimea from the territories of the Middle East, Byzantium, and subsequently from the Ottoman Empire had been taking place since the middle of the 14th century. These chronological periods are also supported by material evidence of the stay of the Karaites in this region (archaeological and epigraphic studies of medieval Solkhat, Mangup-Kale, and Chufut-Kale)
Историко-архитектурные объекты и особенности застройки городов Крымского полуострова в контексте истории караимов / Historical and architectural objects and features of urban development in the Crimean peninsula in the context of Karaites history
No full textВ статье рассмотрена проблема локализации т.н. «караимских кварталов» в городской инфраструктуре городов Крымского полуострова, а также ряда объектов, имеющих важное историко-архитектурное значение. Для работы над статьей были привлечены труды дореволюционных историков и современных специалистов, документация структур, осуществляющих охрану памятников республиканского значения на территории Крымского полуострова, а также материалы, хранящиеся в Государственном архиве Республики Крым.
This publication analyses a problem of localization of what’s been called «Karaite’s neighborhoods» in urban infrastructure of cities of the Crimean peninsula, and also a number of objects that are of great historical and architectural significance. The article is grounded on the works and publications of both pre-revolutionary and modern historians and specialists, as well as documentation of institutions engaged in the protection of monuments of national importance on the territory of the Crimean peninsula, and the materials stored in the State Archive of the Republic of Crimea
The description of Kabarda by D.A. Milutin in the context of the cauсasus version of russian orien-talism foundation
No full textThe paper pertains to the analysis of a manuscript authored by D.A. Milutin in the first half of the 19th century, regarding the region of Kabarda. This manuscript, hitherto unpublished in academic circles, has been the subject of our examination. Our endeavor was to uncover the utilization of orientalist clichés by the manuscript's author, in order to depict both the geographical delineations of this ethno-political entity and the ethnography, livelihood, societal structure, and customary legal norms of its inhabitants. A remarkable parallel can be observed between certain aspects of the manuscript and the ideas propounded by E. Said in his discourse on European Orientalism. The researcher drew a comparison between the political framework and traditions of the Kabardian people and those prevalent in Europe. Moreover, the researcher romanticized the region's historical past, employing the conceptof "reverse human progress," along with other typical methodologies embraced by Orientalist thinkers of that era. Concomitantly, D.A. Milutin provided detailed descriptions of the political, social, and everyday existence in Kabarda, thereby endowing the manuscript with an intrinsic value as an original historical and cultural resource for contemporary scholars. It is concluded that, similar to numerous analogous texts produced by Orientalist scholars, the significance of D.A. Milutin's man-uscript lies not in its political arguments concerning the military and economic dominion of the Russian Empire over the Caucasian peoples, or the imperative to extend colonial governance to these ethnic territorie
Elements of Ethnotaxonomy in Dhule and Nandurbar Districts (Maharashtra)
No full textDhule and Nandurbar districts of Maharashtra are mainly inhabited by tribals and rural folks. The author’s ethnobotanical and floristic forays in these districts brought out certain elements of ethnotaxonomy like ethnotaxonomic markers, classifications, principles of nomenclature and exomorphic features. The facts gathered indicated that the people in the area are fairly flooded with reckonable elements of ethnotaxonomy. And 22 ethnotaxonomic markers are identified. These are evaluated and discussed pertinently in this paper.-----------------------------------------------------------------------------------------------------Post Graduate Department of Botany, S.S.V.P.S’s L.K. P.R.Ghogrey Science College, Dhule-424005 (Maharashtra), India*Corresponding author, Email: [email protected] Cite This Article As: D.A. Patil. 2010. Elements of Ethnotaxonomy in Dhule and Nandurbar Districts (Maharashtra). J. Ecobiotechnol. 2(3): 18-25
Victor Timofeevich Markov (21.06.1948–15.07.2019)
No full textAdrianov N.M., Artamonov V.A., Balaba I.N., Bahturin Y.A., Bokut L.A., Borisenko V.V., Bunina E.I., Chubarov I.A., Gaifullin S.A., Glavatskii S.T., Golubchik I.Z., González S., Grishin A.V., Guterman A.E., Dubrovin N.I., Ilyina N.K., Kanel-Belov A.Y., Kanunnikov A.L., Kislitsyn E.S., Kharchenko V.K., Klyachko A.A., Kozhukhov I.B., Kreines E.M., Kulikova O.V., Lukashenko T.P., Markova O.V., Martínez C., Mikhalev A.A., Mikhalev A.V., Olshanskii A.Y., Pchelintsev S.V., Pentus A.E., Petrov A.V., Prokhorov Y.G., Shafarevich A.A., Shafarevich A.I., Shestakov I.P., Shirshova E.E., Shpilrain V.E., Tenzina V.V., Timashev D.A., Tuganbaev A.A., Tumaykin I.N., Zaicev M.V., Zelmanov E.I
Aanteekeningen omtrent de gevolgen van zware stormvloeden, tusschen 1500 en 1825 voorgekomen, voor de dijken en polders langs het Zuidwestelijk deel der Zuiderzee: samengesteld door den ingenieur van den Rijkswaterstaat D.A. van Heyst
No full textOverzicht van stormvloeden (1500 - 1825) die tot overstromingen langs de Zuiderzee geleid hebben. Aanleiding was de overstroming van 1916, en men wilde weten of deze stormvloed inderdaad uniek was
Discovery of a radiation component from the Vela pulsar reaching 20 teraelectronvolts
No full textGamma-ray observations have established energetic isolated pulsars as outstanding particle accelerators and antimatter factories. However, many questions are still open regarding the acceleration and radiation processes involved, as well as the locations where they occur. The radiation spectra of all gamma-ray pulsars observed to date show strong cutoffs or a break above energies of a few gigaelectronvolts. Using the High Energy Stereoscopic System’s Cherenkov telescopes, we discovered a radiation component from the Vela pulsar which emerges beyond this generic cutoff and extends up to energies of at least 20 teraelectronvolts. This is an order of magnitude larger than in the case of the Crab pulsar, the only other pulsar detected in the teraelectronvolt energy range. Our results challenge the state-of-the-art models for the high-energy emission of pulsars. Furthermore, they pave the way for investigating other pulsars through their multiteraelectronvolt emission, thereby imposing additional constraints on the acceleration and emission processes in their extreme energy limit
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