171 |
Mormom Return Migration: A Return to ZionLarson, Don Calder 01 May 1988 (has links)
The purpose of this research has been to study contemporary Mormon migration in the United States. The underlying assumption of the research was that Utah Mormons are culturally and normatively different from Mormons living elsewhere. Research was carried out in two stages. The first stage was a description of migration streams between four designated regions, i.e. Utah, states adjacent to Utah, other Western states, and the remaining Other states. This stage also determined the proportion of return migration in each stream. It provides initial evidence of the cultural pull of Utah for Mormons.
The second stage was a multivariate analysis of predictors of Mormon return migration in the United States between 1976 and 1981. A theoretical framework of measures of cultural and religious attachment (within the conceptualization of location-specific capital) and status and distance migration differentials was used. Seven models were tested. Each model looked at particular migration directions, i.e. to Utah, to regions other than Utah, from Utah, two models of return to Utah, and two models of return to regions other than Utah.
Findings show that migration to regions other than Utah are predicted better by predominantly socioeconomic stat us variables. destination But migration involving Utah as an origin or also require measures of cultural and/or religious commitment as well. These findings tend to support the conclusion that the intensity of cultural location-specific capital of Utah, as the Mormon cultural core, does influence the type and magnitude of Mormon migration.
|
172 |
Japanese from China the zanryu-hojin and their lives in two countries /Chan, Yee-shan, January 2007 (has links)
Thesis (Ph. D.)--University of Hong Kong, 2007. / Title proper from title frame. Also available in printed format.
|
173 |
Life's highways mobility on the outer reaches /Zitnik, Lou. January 2001 (has links)
Thesis (Ph. D.)--University of Hawaii at Manoa, 2001. / Includes bibliographical references (leaves 293-308). Also available on microfiche.
|
174 |
Discovery of the novel mouFSnrp gene and the characterisation of its in situ expression profile during mouse neurogenesisBradoo, Privahini January 2007 (has links)
Recently, a novel protein family, named as neural regeneration peptides (NRPs), was predicted across the rat, human and mouse genomes by one of my supervisors, Dr. Sieg. Synthetic forms of these proteins have been previously shown to act as potent neuronal chemoattractants and have a major role in neural regeneration. In light of these properties, these peptides are key candidates for drug development against an array of neurodegenerative disorders.
The aim of this PhD project was to provide confirmation of the existence of a member of the NRP coding gene family, annotated in the mouse genome. This gene, called mouse frameshift nrp (mouFSnrp), was hypothesised exist as a -1bp frameshift to another predicted gene AlkB. This project involved the identification of the mouFSnrp gene, and the characterisation of its expression pattern and ontogeny during mouse neural development. Through the work described in this thesis, the mouFSnrp gene was identified in mouse embryonic cortical cultures and its protein coding gene sequence was verified. mouFSnrp expression was shown to be present in neural as well as non-neural tissues, via RT-PCR. Using non-radioactive in situ hybridisation and immunohistochemical colocalisation studies, interesting insights into the lineage and ontogeny of mouFSnrp expression during brain development were revealed. These results indicate that mouFSnrp expression originates in neural stem cells of the developing cortex, and appears to be preferentially continued via the radial glial lineage. mouFSnrp expression is carried forward via the neurogenic radial glia into their daughter neuronal progeny as well as postnatal astrocyte. In the postnatal brain, mouFSnrp gene transcripts were also observed in the olfactory bulb and the hippocampus, both of which are known to have high neurogenic potential. In general, the radial glial related nature of mouFSnrp expression appears to be a hallmark of the mouFSnrp expression pattern through out neural development.
This thesis provides the first confirmation of the existence of a completely novel gene, mouFSnrp, and its putative -1 translational frameshifting structure. Further, preliminary data presented in this thesis regarding the mouFSnrp in situ expression pattern during mouse brain development may suggest a key role of the gene in neuronal migration and neurogenesis in mice. / FRST Bright Futures Enterprise Fellowship
|
175 |
Regularized wave equation migration for imaging and data reconstructionKaplan, Sam Teich 11 1900 (has links)
The reflection seismic experiment results in a measurement(reflection seismic data) of the seismic wavefield. The linear Born approximation to the seismic wavefield leads to a forward modelling operator that we use to approximate reflection seismic data in terms of a scattering potential. We consider approximations to the scattering potential using two methods: the adjoint of the forward modelling operator (migration), and regularized numerical inversion using the forward and adjoint operators. We implement two parameterizations of the forward modelling and migration operators: source-receiver and shot-profile. For both parameterizations, we find requisite Green's function using the split-step approximation. We first develop the forward modelling operator, and then find the adjoint (migration) operator by recognizing a Fredholm integral equation of the first kind. The resulting numerical system is generally under-determined, requiring prior information to find a solution. In source-receiver migration, the parameterization of the scattering potential is understood
using the migration imaging condition, and this encourages us to apply sparse prior models to the scattering potential. To that end, we use both a Cauchy prior and a mixed Cauchy-Gaussian prior, finding better resolved estimates of the scattering potential than are given by the adjoint. In shot-profile migration, the parameterization of the scattering potential has its redundancy in multiple active energy sources (i.e. shots). We find that a smallest model regularized inverse representation of the scattering potential gives a more resolved picture of the earth, as compared to the simpler adjoint representation. The shot-profile parameterization allows us to introduce a joint inversion to further improve the estimate of the scattering potential. Moreover, it allows us to introduce a novel data reconstruction algorithm so that limited data can be interpolated/extrapolated. The linearized operators are expensive, encouraging their parallel implementation. For the source-receiver parameterization of the scattering potential this parallelization is non-trivial. Seismic data is typically corrupted by various types of noise. Sparse coding can be used to suppress noise prior to migration. It is a method that stems from information theory and that we apply to noise suppression in seismic data. / Geophysics
|
176 |
High performance live migration over low-bandwidth, high-delay network with loss preventionPang, Zhu 11 1900 (has links)
Virtualization technology has attracted considerable interest. It allows several virtual machines to run concurrently inside a physical host, which brings multiple advantages. One of the most useful features is called live migration, during which a virtual machine can be migrated over network with minimal disruption. So far, most existing migration algorithms are focused on transferring the runtime state over high-speed, low-delay network. They all require shared storage for file systems. However, this sharing sometimes becomes impossible because of performance loss. Thus, the whole system needs to be transferred during migration.
In this thesis, we introduce a Virtual Machine Management System which contains a block-level solution. Combined with pre-copying the runtime state, we can migrate an entire virtual machine over low-bandwidth, high-delay network with minimum service downtime. We show that this is sufficient even for interactive workloads. We also provide snapshots and full backup for the virtual machine.
|
177 |
Numerical modeling of gas migration into and through faulted sand reservoirs in Pabst Field (Main Pass East Block 259), northern Gulf of MexicoLi, Yuqian 16 August 2006 (has links)
The further exploration and development of Pabst Gas Field with faulted sand reservoirs require an understanding of the properties and roles of faults, particularly Low Throw near Vertical Faults (LTNVFs), in gas migration and accumulation at a reservoir scale. This study presents numerical modeling of gas migration and accumulation processes in Pabst Field. Based on studies of the reservoirs, structure, faults, and fluid properties of the field, reservoir scale modeling was performed to determine the gas supply style and the fault properties by means of hundreds of iterations in which the fault properties and gas supply pattern were modified to match the gas distribution obtained from modeling with the gas distribution inferred from seismic data constrained by well data and production data. This study finds that in the main three sand reservoirs of Pabst Field the overlying younger sands cut down into the underlying older sands, so that partial connections between the three sands allow gas communication among the sands. Meanwhile, three fault families break up the three sands into numerous compartments. A primary fault and large synthetic and antithetic faults act as gas migration pathways: the synthetic and antithetic faults are inlets for gas flow and the primary fault is an outlet, and LTNVFs act as barriers to gas flow. Modeling requires fault properties in the field to change while the field is formed. The porosity and permeability of the faults in Pabst Field are 10% and 0.1 md, respectively, during gas charging of the sand reservoirs. But when there is no gas charging and large gas columns are maintained, the porosity and permeability of the faults decrease to 6% and 0.001 md, respectively. Pabst Field probably has an impulse gas charge history. Fault opening and closing, gas charge and recharge, and replacement of gas by formation water may occur. A combination of stratigraphy, structure, overpressure and gas charge rate control gas migration style, gas charge history, and gas distribution in the field. The significance of the study is that this improved numerical approach for modeling gas migration into and through specifically faulted sand reservoirs fills the gap between basin modeling and production modeling.
|
178 |
Etude de la migration des neutrophiles dans les organes lymphoïdesKesteman, Nicolas D.E.M. 19 October 2007 (has links)
Le rôle des neutrophiles dans la réponse immunitaire innée est bien connu. Ils résident dans le sang et ont une durée de vie limitée à quelques heures. Suite à une infection, ils quittent le flux sanguin et se dirigent vers les sites inflammatoires en réponse à des chimiokines produites par des cellules endothéliales et des fibroblastes. Au niveau du site d’inflammation, les neutrophiles phagocytent et éliminent les pathogènes extracellulaires, et produisent des cytokines inflammatoires.
Des travaux récents montrent que les neutrophiles peuvent également jouer un rôle dans l’immunité adaptative. En effet, ils ont la capacité de transporter des antigènes vers les ganglions lymphatiques, d’induire la différenciation des lymphocytes et d’influencer la réponse immune adaptative par la production de cytokines.
La fonction des neutrophiles dans l’induction et/ou la régulation de la réponse adaptative requiert l’interaction entre ceux-ci et d’autres populations cellulaires, telles que les cellules dendritiques et les lymphocytes.
Nous avons donc examiné la localisation des neutrophiles au niveau de la rate dans des conditions basales ou inflammatoires. D’une manière générale, nos résultats montrent que, en cas d’infection, les neutrophiles migrent vers la pulpe blanche de la rate et se localisent en contact étroit avec les lymphocytes T. Ce phénomène de migration est dépendant des molécules CD14 et MyD88 et corrèle avec l’augmentation de l’expression des chimiokines CXCL1 et 2, ainsi qu’avec la diminution de l’expression du récepteur CXCR2 à la surface des neutrophiles.
Cependant, au niveau de la cavité péritonéale, le recrutement des neutrophiles est augmenté en absence de la molécule CD14. Nos résultats montrent que la migration des neutrophiles, dans les organes lymphoïdes et non lymphoïdes, est dirigée par des mécanismes différents.
|
179 |
Chinesen in Bukarest : Diskurse und Geschichten / Chinese in Bucharest : discourses and storiesWundrak, Rixta January 2008 (has links)
In dieser ethnographisch-soziologischen Fallstudie wird die Geschichte der chinesischen Immigration in Bukarest nach 1990 in ihrer Besonderheit und ihren allgemeinen Strukturen nachvollzogen. Dies geschieht durch eine Doppelperspektive auf den Fall: Die Rekonstruktion der diskursiven (Re-)Präsentation des Falles als methodisch-analytische Vorstufe wurde einer anschließenden historischen Rekon-struktion der erlebten Geschichte der Migranten vorangestellt. Die anschließende Kontrastierung der Ergebnisse aus beiden Analyseschritten diente der Heraus-arbeitung vorher noch nicht sichtbarer Interdependenzen und Bezüge zwischen diesen beiden Ebenen. Mit anderen Worten: Die diskursive Ebene und die historische bzw. erlebte Ebene bilden gemeinsam und in Verschränkung miteinander die konstitutive/n Struktur/en des Falles: Erstens geht es um die Besonderheit der Post-1989-Migration von China nach Rumänien im Kontext von Transformationen. So ist für die Struktur und den Verlauf des Falles bestimmend, dass sich mehrere Wandlungsprozesse sowohl im Herkunfts- als auch im Einwanderungskontext zugleich ereigneten. Dazu gehören die Globalisierung allgemein sowie die als Transformationen bezeichneten Prozesse in China seit 1978 und in Rumänien seit 1989. Auf nationaler, lokaler Ebene sowie auf der Ebene der alltäglichen sozialen Wirklichkeit der Stadtbevölkerung und der Immigranten in Bukarest war zu beobachten, dass diese mit rapiden Veränderungen konfrontiert waren und sind. So kamen zu Beginn der 1990er Jahre einige Pioniere mit Koffern voll China-Ware in Bukarest an und verkauften ihre Ware auf den unzähligen kleinen Straßenmärkten der Stadt. Im Jahr 2007 befindet sich auf einem großen Areal am Stadtrand von Bukarest ein Baukomplex aus acht großen Shopping-Malls. Chinesische UnternehmerInnen investieren nun in Großprojekte wie etwa der Telekommunikation in Rumänien. Neu ist auch die Rekrutierung von chinesischen Textilarbeiterinnen durch rumänische Unternehmer. Diese Entwicklung hängt mit dem gegenwärtigen Mangel an rumänischen Arbeitskräften aufgrund der Auswanderungs-wellen aus Rumänien zusammen. Charakteristisch ist jedoch, dass diese ge-sellschaftlich tiefgreifenden Änderungen, die nicht nur die hier genannten öko-nomischen, sondern auch politische und soziale Konsequenzen haben, in einem starken Kontrast dazu stehen, dass ihre soziale Wirklichkeit in der Forschung, der Politik und Öffentlichkeit unbeachtet und unbekannt blieb.
Als zweites Themenfeld ist das Spannungsverhältnis von lokalen und globalen Prozessen für die Geschichte der Migranten zu nennen. Dabei sind die Bedeutung der „Verortung“ einerseits und die der Transnationalität andererseits strukturbildend für die Fallgeschichte. Dabei spielte die Auseinandersetzung mit dem wissenschaftlichen Transnationalismuskonzept eine besondere Rolle: Dieses behandelte ich als theo-retischen Diskurs, der zunächst kritisch betrachtet wurde. Die Frage, ob und wie die chinesische Community in Bukarest transnational lebt und was transnationale Lebens-formen sein könnten, wurde empirisch beantwortet.
Drittens habe ich unter Bezugnahme auf das Konzept des sozialen Deutungsmusters aufgezeigt, dass Informalität als soziales Konstrukt auf unterschiedlichen Ebenen fallbestimmend ist. Informalisierungsprozesse sowie damit verbundene Illegalisierung und Kriminalisierung der Migranten in Europa bilden also ein weiteres Themenfeld der Fallstruktur.
Schließlich stellt die gesellschaftliche Konstruktion kultureller Deutungsmuster über chinesische Migranten ein viertes zentrales Thema der Fallstruktur dar. Die chinesischen Migranten in Bukarest leben im Fadenkreuz unterschiedlicher Zuschreibungen. Im Herkunftsland werden sie als patriotische Kapitalisten, die Moder-nität ins Land bringen, gefeiert. In Europa werden sie der internationalen Welle ‚illegaler Migration‘ zugeordnet und auf Kriminelle und/oder Opfer reduziert. In Bukarest leben sie mit und in Konkurrenz der Bewertungen bzw. Abwertungen von Minderheitengruppen, wie etwa der Roma-Minderheit. Diese Bewertungen und Zuschreibungen haben mehrere Konsequenzen. Eine davon ist, dass chinesische Immigranten in Bukarest es gelernt haben, mit diesen aktiv umzugehen. So wurde deutlich, dass sich kulturelle Deutungsmuster nicht nur habituell verankern oder als biographisches Kapital gelebt werden, sondern situationsangemessen genutzt oder sogar teilsweise inszeniert werden, mit dem Ziel, einen Weg in die Gesellschaft zu finden und in dieser als Minderheitengruppe in eine respektierte Position zu gelangen. / Based on a case study on the new Chinese migrant network in Bucharest, this dissertation shed light onto this new migration pattern that has neither been investigated nor considered an important political matter in Europe. On the contrary, the issue of immigration has been consciously ignored by the Romanian public and was considered a ‘taboo’ for Romanian state agencies during the first half of the 1990s. Combining a variety of ethnographic methods, the following research-questions were addressed: Why and how are those immigrants ‘kept secret’? How are Chinese migrants regarded or represented in Europe and in the society of Bucharest? And what is the story behind these discourses?
In this study, I reconstruct the historical development of the new Chinese migration wave to Eastern Europe, the immigration process during the early ‘wild’ years of transition in the 1990s and, finally, the rise and development of Chinese markets in Romania resulting in an urban project called ‘Chinatown of Bucharest.’ In particular, I intend to highlight with this the complexity of the immigrants’ network-building during this process, which implicates both their social embeddedness in the ‘transition-society’ as well as their transnational links to ‘homeland’.
|
180 |
Labour Migration : A Study of Mexico´s labour flow to the United StatesHedin, Andreas, Josefsson, Erik January 2007 (has links)
No description available.
|
Page generated in 0.0733 seconds