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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
61

Development and implementation of a system for reading nuclear etched tracks in PADC (CR-39) using coherent light scattering

Gepford, Heather Jean 05 1900 (has links)
No description available.
62

Vilkų (Canis lupus L.) elgsenos ypatumai Šiaurės Lietuvoje / Behaviour peculiarity of wolves (Canis lupus L.) in North Lithuania

Špinkytė-Bačkaitienė, Renata 06 June 2005 (has links)
In this work is researching the behaviour peculiarity of wolves and the public opinion towards wolves. The aim – to investigate the wolves’ tracks and the harm of wolves to livestock in Gulbinas forest and in district of this forest; to evaluate the local public opinion towards wolves. The object –the local wolves’ population living in Gulbinas forest and neighborus lesser forests (Vileišiškiai, Vaitutiškiai, Daugmaudžiai, Skobiškiai and Aušgiriai) also agricultural land between these forests in northern part Šiauliai district. Methods – the behaviour of wolves was investigated by snow tracking method; the harm and the public opinion towards wolves were investigated by questionnaire method. Technical tools – global position estimation appliance GPS „EMAP“, computer programme ARCWIEW GIS 3.2. Results – Directional tracks of wolves may be founded in various age stands and clear cut areas. So it can be that farming in the forests does not do the substantial influence to wolves’ choice of tracks. But it’s observes the tendency, that wolves give the priority to more older stands and avoid clear cut areas. Mostly were attacked young animals up to 1 year old (76%). They make the most big part (4,8%) of livestock killed through the year from the all number of young livestock. Mostly livestock were attacked during July - August (76%), less during Sepember – (24%).
63

Kinematics of the Paparoa Metamorphic Core Complex, West Coast, South Island, New Zealand.

Schulte, Daniel January 2011 (has links)
The Paparoa Metamorphic Core Complex developed in the Mid-Cretaceous due to continental extension conditioning the crust for the eventual breakup of the Gondwana Pacific Margin, which separated Australia and New Zealand. It has two detachment systems: the top-NE-displacing Ohika Detachment at the northern end of the complex and the top-SW-displacing Pike Detachment at the southern end of the complex. The structure is rather unusual for core complexes worldwide, which are commonly characterised by a single detachment system. Few suggestions for the kinematics of the core complex development have been made so far. In this study structural-, micrographic- and fission track analyses were applied to investigate the bivergent character and to constrain the kinematics of the core complex. The new results combined with reinterpretations of previous workers’ observations reveal a detailed sequence of the core complex exhumation and the subsequent development. Knowledge about the influence and the timing of the two respective detachments is critical for understanding the structural evolution of the core complex. The syntectonic Buckland Granite plays a key role in the determination of the importance of the two detachment systems. Structural evidence shows that the Pike Detachment is responsible for most of the exhumation, while the Ohika Detachment is a mere complexity. In contrast to earlier opinions the southwestern normal fault system predates the northeastern one. The Buckland Pluton records the ceasing pervasive influence of the Pike Detachment, while activity on the Ohika Detachment had effect on the surface about ~8 Ma later. Most fission track ages are not related to the core complex stage, but reflect the younger late Cretaceous history. They show post core complex burial and renewed exhumation in two phases, which are regionally linked to the development of the adjacent Paparoa Basin and the Paparoa Coal Measures to the southwest and to the inception of seafloor spreading in the Tasman Sea in a larger context.
64

Evidence for the existence of jets in photon-parton interaction events at center of mass energies from 18 to 28 GEV

Alton, Andrew K. January 1995 (has links)
Experiment E683 at Fermi National Accelerator Laboratory (FNAL) in Batavia, Illinois, uses a modular, high-energy sampling calorimeter as the basis of the detector system. This detector provides information on the energy and position of particles that exit a collision of a photon or pion with a target proton. While exiting particles are thought to form what are described as "jets", and several E683 projects involve working with these jets, it has not yet been demonstrated that jets indeed have been detected.The solution proposed here involves demonstrating that E683 data has a statistically significant "jettiness" even in a data sample which has not been biased. Towards this, a data sample was selected based on criteria unrelated to the presumption of jets. Planarity and the Et Flow were chosen as measures of how oblong(jetlike) an event is. The sample was then examined for planarity and Et flow in a number of kinematic ranges and the results demonstrate that over a certain kinematic range, events in our sample are increasingly planar, as we hypothesized. / Department of Physics and Astronomy
65

Optimization of particle tracking for experiment E683 at Fermi National Laboratory

Hosack, Michael G. January 1995 (has links)
The subject of this thesis is the improvement of particle tracking through the identification and correction of small systematic errors in particle "hit" locations due to positioning of tracking detectors. These errors call be as large or larger than the statistical spatial resolution of tracking detectors themselves, and therefore must be corrected. The focus is on identification and correction of errors due to rotations and beam axis translations.An algorithm is developed for use with proportional wire chamber and drift chamber detectors in experiment E683 at the Wideband facility of Fermi National Laboratory. In this experiment, high energy (tens of GeV) particles, primarily mesons, were produced when photons with energies of 40-400 GeV struck a metal or liquid target.At the present time, the method and code developed for this thesis has not been applied to real data, although an analysis of its effectiveness as a function of detector resolution has been investigated with Monte-Carlo simulations. / Department of Physics and Astronomy
66

Historic and future extreme weather events over southern Baffin Island

Desjardins, Danielle 04 January 2012 (has links)
Historic and future extreme precipitation and wind events over southern Baffin Island, more specifically Iqaluit, Kimmirut, Pangnirtung and Cape Dorset are examined. Two sets of modeled re-analysis data, the Canadian Regional Climate Model (CRCM) forced with European Centre for Medium-Range Weather Forecasts Regional Analysis 40 (ERA40) and the other the North American Regional Re-analysis (NARR) dataset were used to characterize the atmosphere during historic events. Two sets of CRCM data forced with Canadian Global Climate Model (CGCM) data, one from 1961-1990 and the other from 2041-2070, are compared to assess the changes in extreme events in the future. Extreme events were defined by daily precipitation and sustained wind thresholds. Based on the CRCM future projection, events were inferred to increase in intensity for all communities and increase in frequency for 3 of the 4 communities. A shift in the Arctic storm season was also inferred in the future projection.
67

RASTROS DE EROS: INTUIÇÕES SOBRE UMA ER/ÉTICA POSSÍVEL / Traces of eros: Intuitions about a possible er/etica

MORA GRISALES, OFIR MARYURI 01 August 2016 (has links)
Submitted by Noeme Timbo (noeme.timbo@metodista.br) on 2017-01-26T12:32:24Z No. of bitstreams: 1 OFIRMORAGRISALES.pdf: 1496235 bytes, checksum: c2b9867fdd285911680e608d0ccfbe68 (MD5) / Made available in DSpace on 2017-01-26T12:32:24Z (GMT). No. of bitstreams: 1 OFIRMORAGRISALES.pdf: 1496235 bytes, checksum: c2b9867fdd285911680e608d0ccfbe68 (MD5) Previous issue date: 2016-08-01 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / Eros is a vital and dynamic energy very difficult to define and frame. Thus I decided to grasp with it through the fragments and tracks I could glimpse within the impetus and beauty of its journey in the lives of people and through human relationships. My interest in eroticism was triggered by some initial concrete suspicions regarding its peripheral, almost absent location in theological discourses, the erotization of violence and domination as a common phenomenon in Latin America, the racialization of the eroticism and finally an excessive sexualization of eroticism in Western culture. I aimed at a reconstruction of eroticism from an ethical and transformative perspective. Deconstruction and interruption were used as feminist and subaltern strategies of searching for other meanings, other practices and even another language. This led my way through a destabilizing dynamic of the hegemonic thinking that underpinned eroticism in theory and practice. Feminist critical theologies, as well as liberation and indecent theologies, walked together along this erratic route that ended up transcending the theoretical framework of theological discourses. Thus I proposed that er/ethics shall be a plausible expression for an open and new space of meaning and negotiation of eroticism which can only be discovered in its transgressive potential in that it is able to discover and keep alive the flow of energy that moves us in the depths of our bodily experience, individually and collectively and beyond domination, beyond the way in which time is experienced in our capitalist and postcolonial world. The fragmented character of the word make the borders fluid, destabilizing disciplinary boundaries, and at the same time, it creates the conditions of its relatedness. / Eros é uma força vital, um fluir de energia difícil de definir e emoldurar. Optei assim, por percebê-la a partir dos fragmentos, dos rastros que consegui vislumbrar no ímpeto e beleza do seu percurso nas vidas e nas relações humanas. O meu interesse pelo erótico decorreu inicialmente de algumas suspeitas concretas: o lugar periférico, quase ausente do erótico na teologia, a erotização da violência e da dominação como prática recorrente na América Latina, a racialização do erótico e finalmente uma excessiva sexualização do erotismo na cultura ocidental. Visei, pois, reconstruir o erótico desde uma perspectiva ética e transformadora. Para tanto, o caminho foi a desconstrução e a interrupção enquanto estratégias feministas e subalternas de busca por outros significados, outras práticas e inclusive outra linguagem. Tal caminho me endereçou num processo de desestabilização da compreensão hegemônica que informava teológica e simbolicamente teorias e práticas do erotismo. Teologias críticas feministas, de libertação e indecentes, caminharam junto nesse percurso errático que inevitavelmente excedeu os limites do discurso teológico. Finalmente então, propus que a er/ética seja a expressão para um novo e aberto espaço de significação e negociação do erótico, o qual só pode ser compreendido no seu potencial transgressor, na medida em que é capaz de descobrir e manter vivo o fluxo de energia que nos move, no profundo da nossa experiência corpórea, individual e coletiva e para além da dominação e da utilidade do tempo e mundo capitalista e colonial. A fragmentação da palavra coloca as fronteiras em aberto, desestabiliza os limites disciplinares, ao mesmo tempo em que cria as condições para sua relação.
68

Exhumation et évolution du drainage himalayen depuis 15 Ma. Apport des archives sédimentaires / Exhumation and drainage evolution of the Himalaya since 15 Ma

Chirouze, François 14 January 2011 (has links)
Les variations latérales d'exhumation de l'Himalaya sont peu documentées, notamment dans la partie est. Dans ce mémoire, l'évolution de la chaîne himalayenne est étudiée à partir de trois coupes réalisées dans le bassin d'avant-pays mio-pliocène où l'âge des sédiments a été déterminé par magnétostratigraphie. La contribution des différents domaines sources ainsi que leur exhumation ont été définies par des analyses géochimiques (εNd) et de thermochronologie détritique (apatite et zircon). Dans la partie orientale, nos observations suggèrent que les surrections concomitantes du plateau du Shillong et du prisme Indo-Birman ont repoussé le Brahmapoutre vers 7 Ma le long du front de la chaîne himalayenne. Les résultats des analyses de thermochronologie détritique soulignent une dynamique et des vitesses d'exhumation (1,7 km/Ma) semblables à celles de la partie centrale de la chaîne, en dépit de précipitations plus intenses et malgré la présence du plateau du Shillong au sud qui pourrait avoir absorbé une partie du raccourcissement tectonique. En revanche, l'installation d'une exhumation contrastée semble légèrement plus tardive que dans la partie centrale et ouest de la chaîne. Enfin, ces travaux suggèrent qu'au niveau de la syntaxe orientale il a existé un temps de latence d'au moins 3 Ma avant l'installation d'une rétroaction tectonique-érosion dans le massif du Namche Barwa liée à l'installation d'un drainage transverse à la chaîne. Au sein même de la partie centrale de la chaîne des variations latérales d'exhumation ont été mises en évidence, notamment, la mise en place au Népal occidental d'une exhumation rapide, reconnue dès 13 Ma, alors que celle-ci semble plus tardive dans la partie orientale du Népal. L'étude de la coupe occidentale a montré que le réseau de drainage du paléo-Indus est stable dans le bassin d'avant-pays depuis le Miocène moyen. En revanche, la proportion de matériaux provenant de l'Himalaya augmente à partir du Pliocène et ceci de manière généralisée le long de la partie ouest de la chaîne, suggérant un changement drastique des conditions d'exhumation de la chaîne. L'exhumation de la chaîne himalayenne apparaît donc comme étant segmentée latéralement. La mise en place d'une exhumation contrastée et diachrone le long de la chaîne ne semble donc pas liée à d'éventuels changements climatiques qui auraient affecté la chaîne de manière globale. La dynamique d'exhumation du prisme himalayen observée actuellement semble donc liée à des hétérogénéités de la croûte indienne, qui contrôlerait la mise en place des structures profondes de la chaîne. / From west to east along the Himalayan range, exhumation rates are variable and remain poorly constrained for the most part, especially in the eastern part of the mountain belt. To better understand their variability and to determine the influence of climatic and tectonic control, this thesis investigates the evolution of the range thanks to samples collected from three sections located in the eastern, central and western parts of the Mio-Pliocene Himalayan foreland basin. In these sections, sediment depositional ages were determined using magnetostratigraphy. Sediment provenance and contribution of the main litho-tectonic source-rock units were identified using geochemical analyses (Nd), while exhumation rates were determined with detrital apatite and zircon thermochronology. In the eastern part of the Himalaya, our results from the Kameng section in Arunachal Pradesh suggest that the surface uplift of both the Shillong Plateau and the Indo-Burman range have pushed the Brahmaputra River to the north, in front of the Himalayan range at about 7 Ma. Miocene-Pliocene exhumation rates inferred from detrital thermochronology are on the order of 1.7 km/Myr for the fastest exhuming areas, which is close to the rates reported for the central part of the range. Therefore, the distribution of precipitation, as well as the Shillong Plateau uplift which may have modified the convergence rate between the Indian and Eurasian plates, seem to have minor influence on the exhumation of eastern Himalaya. However, the onset of contrasting exhumation seems to have begun somewhat earlier than in the western and central parts of the range. In addition, our results highlight a 3 Myr time-lag between the installation of the Brahmaputra as a trunk river in the eastern syntaxes, and the onset of a fast exhumation there. Within the central part of the Himalaya, our work along the Muksar section in eastern Nepal documents lateral variations in exhumation rates, as western Nepal has been exhuming rapidly since 13 Ma, whereas the onset of fast exhumation seems to have occured later in eastern Nepal. Our results from the Chinji section in Pakistan, in western Himalaya, suggest that the Indus drainage network in the foreland basin has been stable since the middle Miocene. However, the Himalayan source contribution has been increasing since the Pliocene all along the western part of the range, and this suggests that a drastic change in the exhumation dynamics of the range occurred at that time. The Himalayan exhumation seems to be divided into independent segments along the range. The lateral variability in exhumation rates and timing of changes in exhumation rates do not seem to be linked to climatic change, which should produce a global response of the range. The exhumation dynamics is more likely to be linked to the tectonics structuring the wedge, possibly controlled by the crustal heterogeneity within the Indian plate.
69

De-revolutionizing the “red classics”: a case study of Tracks in the Snowy Forest in fiction, model opera, television and film

Wang, Liying 10 August 2018 (has links)
“Red classics” generally refer to a collection of Chinese literary works produced from the late 1940s to the mid-1960s. Many of them were remade to film, opera, and television series in different periods. One of the “red classics” was the semi-autobiographical military romance Tracks in the Snowy Forest by Qu Bo. This novel and its many adaptations have been popular for more than half a century. This thesis takes Tracks in the Snowy Forest as a case study to explore how socialist “red classic” works have been “de-revolutionized,” reinvented for a new age and a new audience as products for popular consumption in post-Mao China, as compared to the sterner revolutionary works of the Mao era. / Graduate
70

Morfotectônica da região centro-leste do Estado de São Paulo e áreas adjacentes de Minas Gerais: termocronologia e paleotensões

Ribeiro, Luiz Felipe Brandini [UNESP] 12 December 2003 (has links) (PDF)
Made available in DSpace on 2014-06-11T19:32:22Z (GMT). No. of bitstreams: 0 Previous issue date: 2003-12-12Bitstream added on 2014-06-13T19:42:57Z : No. of bitstreams: 1 ribeiro_lfb_dr_rcla.pdf: 2783705 bytes, checksum: e1a426bdf710fbec9239ad48c9b2b00a (MD5) / O embasamento cristalino precambriano no sudeste do Brasil registra uma história tectônica fanerozóica que compreende uma série de reativações tectônicas caracterizadas por soerguimentos, subsidências e reativações de falhas. Para quantificar, datar e associar estas reativações com os eventos tectônicos regionais foram realizadas análises de caráter multidisciplinar, que consistem em reconhecimento de superfície erosivas, bem como delimitação e reconhecimento de depósitos correlativos. Com o intuito de reconhecer e quantificar feições de caráter rúptil, foi realizada análise dinâmica de falhas que inclui paleotensões e reconhecimento da rugosidade de clastos. A interação destas metodologias necessitou de uma associação temporal dos eventos, para isto foi feita datações pelo método Ar/Ar em material de falha e traços de fissão em apatitas próximo a falhas. Os resultados do campo de esforços com a geomorfologia permitiram definir cinco domínios morfoestruturais principais, onde foram registrados antigos eventos tectônicos recorrentes ao longo do Fanerozóico. Estes domínios foram denominados de acordo com o reconhecimento geográfico já proposto para a área, assim temos: A serrania de São Roque, O Planalto de Jundiaí, Mantiqueira Ocidental e Depressão de Cambuí e Planalto de Campos do Jordão. Os episódios tectônicos associados a estes domínios estão relacionados a soerguimentos e nos domínios Serrania de São Roque e Planalto de Jundiaí a geração e deformação de materiais de falha (pseudotaquilitos). Estes soerguimentos preservaram paleosuperfícies erosivas em cotas mais altas, que são indicativas de antigos ciclos de erosão, estas são observadas, principalmente nos domínios Mantiqueira Ocidental e Planalto de Campos do Jordão... / Phanerozoic tectonic histories of basement is registred many reactivations of faults, uplifts and subsidence. To quantify, dater and to associate this reactivations with tectonics events are multidisciplinary analyses, consists relief analysis, paleostress analysis, and structural analysis of faults, fission track and Ar/Ar ages. The results to permit subdivide area in five domains, to registry uplift and reactivation of faults. This faults to origin pseudotachylytes, these rocks . The uplift to basement relation with subsidence of Parana basin showing one complex relation between the basement and the deposition of Parana basin. The evolution of this basin seems to have been strongly influenced by compressive and distensive events associated to the subduction of Panthalassan plate under the southwestern, Gondwana margin, reflected as important unconformities in the stratigraphic framework of the Parana basin the elucidation of the uplift and denudation histories of the basement shield is crucial to the understanding of these tectonics effects.

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