2,784 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
Phenotypic analysis of the Plp-deficient mouse
No full textAvailable from British Library Document Supply Centre-DSC:DXN033951 / BLDSC - British Library Document Supply CentreSIGLEGBUnited Kingdo
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
Myelin proteolipid proteins promote the interaction of oligodendrocytes and axons
No full textAlthough proteolipid protein (PLP) and its DM20 isoform are the major membrane proteins of CNS myelin, their absence causes surprisingly few developmental defects. In comparison, missense mutations of the X‐linked Plp gene cause severe dysmyelination. Previous studies have established roles for PLP/DM20 in the formation of the intraperiod line and in maintaining axonal integrity. We now show that a normal number of oligodendrocytes are present in mice lacking PLP/DM20. However, in heterozygous females, which are natural chimeras for X‐linked genes, oligodendrocytes lacking PLP/DM20 are in direct competition with wild‐type oligodendrocytes that have a distinct advantage. PLP+ oligodendrocytes and PLP+ myelin sheaths make up the greater majority, and this feature is generalised in the CNS throughout life. Moreover, in the absence of PLP/DM20, a proportion of small‐diameter axons fails to myelinate, remaining ensheathed but lacking a compact sheath, or show delayed myelination. These findings suggest that PLP/DM20 is also involved in the early stages of axon–oligodendrocyte interaction and wrapping of the axon
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
Delayed-onset urinary incontinence in five female dogs with ectopic ureters
No full textThis case series describes five female dogs with congenital ectopic ureter presenting with delayed-onset urinary incontinence out of 22 female dogs diagnosed with ectopic ureter over a 102-month period at a veterinary teaching hospital. All five dogs improved following surgical treatment of ectopic ureter, but only three remained continent long-term without further intervention. Delayed-onset urinary incontinence in female dogs with ectopic ureters may be more common than the current literature suggests. Congenital ectopic ureter should be considered and investigated as a possible contributing factor in female dogs presenting with delayed-onset urinary incontinence
Gastric disease in the dog and cat
No full textThe physiology of the normal gastric defence mechanisms in the dog and cat is reviewed to emphasize the routes by which drugs can be used to protect the gastric mucosa. The action of the main anti-ulcer and pro-kinetic drugs are discussed in relation to the diseases that they may be used to treat. Gastric disease in the form of gastric dilatation/volvulus, chronic vomiting without obstruction and gastric outflow disease are described from the point of view of diagnosis and treatment
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
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
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