894 research outputs found
Impacts of hunter-gatherers on the vegetation history of the eastern vale of pickering, Yorkshire
No full textResearch is undertaken into the vegetation and human impact at three previously un-researched archaeological sites from the eastern Vale of Pickering. The vegetation history is reconstructed from the end of the Windermere Interstadial c. 13,000 (^14)C yr BP until the final Mesolithic c. 5100 (^14)C yr BP. The early Mesolithic human impact on the vegetation is assessed using a three stage statistical test to establish the internal variability in the data as well as background variations in pollen output. The results reveal that humans had a small but significant impact on the vegetation around two of the sites. Pollen preservation at the third site precluded analyses of the impacts of humans on the vegetation. The three-stage test used to test for human impact was quite successful but requires revision before any further use. On the whole the tests confirmed the findings of conventional human impact analyses. During the pre-Holocene fires occurred on a regular basis. These fires varied in location and intensity, suggesting that some of the fires were regional or large-scale, whilst others were small and very localized. A multi-causal explanation has been given for the fires. Later, during the early Mesolithic, human groups are thought to have burnt the reedswamp at the lake edges as part of an economic strategy. Star Carr is the only site that demonstrates clearance of significant areas of woodland. During the later Mesolithic the hunter-gatherers have a greater impact on the vegetation within the Vale. This is attributed to the need for more resources as a result of vegetation change and increased population levels. Unlike their counter-parts from the North York Moors, the occupants of the lowland Vale of Pickering cause no long-term change to their environment
A study of the issues surrounding the understanding of historic military artefacts as primary source documents with particular emphasis on the sword
No full textLire désespérément… W.G. Sebald
No full textDans la foulée d’Évelyne Grossman et de sa réflexion sur « la paradoxale vitalité de la négativité dépressive » (L’angoisse de penser, 2008), cet article envisage l’exploration littéraire de la négativité et de la dépossession de soi, caractéristique d’une certaine modernité que l’on peut faire remonter à Mallarmé, en tant qu’elle peut fonctionner, pour le lecteur, à la manière d’un antidépresseur paradoxal. Questionnant d’abord de façon générale certaines conceptions « sublimantes », réparatrices ou rédemptrices de la littérature (Leo Bersani) et la prégnance des modèles platoniciens et aristotéliciens de la création comme pharmakon, l’auteure tente ensuite de cerner plus spécifiquement, à partir de l’oeuvre de l’écrivain allemand W.G. Sebald, le caractère tout à la fois anxiogène et libérateur de la symbolisation de la perte en littérature.Following Évelyne Grossman and her developments about the “paradoxical vitality of depressive negativity” (L’angoisse de penser, 2008), this article addresses the literary exploration of negativity and self-deprivation, characteristic of a certain modernity one can retrace up to Mallarmé, and proposes that it can function, for the reader, as a paradoxical antidepressant. Questioning at first more generally the current sublimating conceptions of literature and the impregnation of the platonician and aristotelian models of creation as pharmakon, the author seeks then to embrace more precisely, on the basis of the works by German writer W.G. Sebald, the all-together anguishing and liberating effect of the symbolization of loss in literature
Dynamics of myosin, microtubules, and Kinesin-6 at the cortex during cytokinesis in Drosophila S2 cells
No full text© The Authors, 2009 . This article is distributed under the terms of the Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported License. The definitive version was published in Journal of Cell Biology 186 (2009): 727-738, doi:10.1083/jcb.200902083.Signals from the mitotic spindle during anaphase specify the location of the actomyosin contractile ring during cytokinesis, but the detailed mechanism remains unresolved. Here, we have imaged the dynamics of green fluorescent protein–tagged myosin filaments, microtubules, and Kinesin-6 (which carries activators of Rho guanosine triphosphatase) at the cell cortex using total internal reflection fluorescence microscopy in flattened Drosophila S2 cells. At anaphase onset, Kinesin-6 relocalizes to microtubule plus ends that grow toward the cortex, but refines its localization over time so that it concentrates on a subset of stable microtubules and along a diffuse cortical band at the equator. The pattern of Kinesin-6 localization closely resembles where new myosin filaments appear at the cortex by de novo assembly. While accumulating at the equator, myosin filaments disappear from the poles of the cell, a process that also requires Kinesin-6 as well as possibly other signals that emanate from the elongating spindle. These results suggest models for how Kinesin-6 might define the position of cortical myosin during cytokinesis.This work was supported by a National Institutes of Health grant NIH
38499 to R.D. Vale
Traces of trauma in W.G. Sebald and Christoph Ransmayr
No full textBoth W.G. Sebald (1944-2001) and the Austrian author Christoph Ransmayr (1954-) were born too late to know directly the violence of the Second World War and the Holocaust, but these traumatic events are a persistent presence in their work. In a series of close readings of key prose texts, Dora Osborne examines the different ways in which the traces of a traumatic past mark their narratives. By focusing on the authors' use of visual and topographical tropes, she shows how blind spots and inhospitable places configure signs of past violence, but, ultimately, resist our understanding. Whilst links between the two authors are well-documented, this book offers the first full-length study of Sebald and Ransmayr and their complicated relation to the traumatic traces of National Socialism. - from book cover
Röntgenografisch onderzoek van aluminiumkristallen, ontstaan door rekristallisatie
No full textApplied Science
Homo-epitactische kristalgroei bij elektrokristallisatie van koper
No full textMechanical, Maritime and Materials Engineerin
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