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1
Animento, Stefania. "Bringing Movement into Class Analysis." Doctoral thesis, Humboldt-Universität zu Berlin, 2021. http://dx.doi.org/10.18452/22844.
Повний текст джерелаАнотація:
Migration wird oft als soziales Problem dargestellt, das mit Benachteiligungen einhergeht. Allerdings hat die Migrationsforschung in den letzten Jahren gezeigt, dass Migration sich u.a. durch Klasse, Geschlecht und Ethnizität ausdifferenziert. Diese Studie fokussiert auf das Konzept der sozialen Klasse. Die Studie schlägt vor, Mobilität als Ressource zu betrachten, die in der Gesellschaft ungleichmäßig verteilt ist. Wie beeinflusst die soziale Klasse der Migrant_innen ihre räumliche Mobilität und die Art und Weise, wie sie mit Migrationsregimen interagieren? Wie beeinflusst ihre Mobilität die Prozesse von Klassenformation, in denen sie während der Migration involviert werden? Die Analyse erfolgt durch die Untersuchung der Migrationsgeschichten von jungen italienischen Migrant_innen, die seit 2008 nach Berlin zugewandert sind. Sie basiert auf einem Mix an Methoden, bzw. einer Online-Umfrage, 40 Interviews, drei Fokus-Gruppen und zahlreichen teilnehmenden Beobachtungen. Erstens untersucht der theoretische Teil die Entwicklung des Konzeptes der sozialen Klasse und deckt die Leerstellen der Klassenforschung auf. Zweitens wird im empirischen Teil den Zugang italienischer Migrant_innen zu Wohnen und Arbeit in Berlin untersucht. Schließlich beweist die Studie, dass das Regime der „freien“ EU-Binnenmigration wohl durch die Entstehung von Grenzen auf lokaler Ebene gekennzeichnet ist. Nach der Analyse scheint dieses Regime eher eine Lebensführung zu favorisieren, in der permanente Mobilisierung der eigenen Arbeitskraft notwendig ist. Die Studie bestätigt, dass Mobilität als Ressource zu betrachten ist, die zunehmend relevant für den Lebensunterhalt ist, und plädiert deshalb dafür, eine kritische Perspektive auf Migration zu entwickeln, die den Fokus auf die Frage nach der Kontrolle und Eigentum von Mobilität setzt.Migration has been studied for long time as a social problem, both for migrants and for sending and destination countries. However, research shows that migration has become increasingly differentiated along social, economic, gender and cultural lines. The present study unravels the concept of migration by introducing social class as a crucial intervening variable. It suggests considering mobility as an income-generating resource unevenly distributed across the population. How does the social class of migrants affect their mobility and the ways how it is incorporated into a migration regime? How is mobility related to processes of class formation in contemporary capitalism? The study focusses on the case of young Italian migrants who moved to Berlin after the economic crisis of 2008. Firstly, it tackles the rise, decline and renaissance of the class concept, showing the blind spots of class analysis. Secondly, the empirical part, based on a web survey, 40 interviews, 3 focus groups and several participant observations, explains how Italian migrants access resources in Berlin developing a life conduct predicated on mobility. The imperative to move spills over from the domain of spatial mobility into the domain of work, with the refusal of doing the same job “forever”, and into that of reproduction, with the construction of flexible forms of emotional engagement. The research highlights how newcomers enter processes of social differentiation on the housing and labor market. Endless mobilization of young labour force appears as the main policy goal for the governance of intra-EU migration. The analysis finally suggests considering mobility as a class-related resource, whose ownership and control should become a crucial issue for the understanding of contemporary societies.
2
Falk, Anna. "Stem cells : proliferation, differentiation, migration /." Stockholm, 2005. http://diss.kib.ki.se/2006/91-7140-497-X/.
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3
Krummel, Sharon A. "Women's movement : the politics of migration in contemporary women's writing." Thesis, University of Sussex, 2004. http://sro.sussex.ac.uk/id/eprint/2486/.
Повний текст джерелаАнотація:
This thesis focuses on fiction and poetry written by women who have migrated from former British colonies in the Caribbean, Africa and South Asia, to Britain or North America; it explores how issues of race, gender, sexuality, belonging and power are raised through the writings‘ accounts of migration, displacement and changing identity. The thesis stresses the importance of these writings in addressing key issues in feminist politics and in women‘s lives, and in making significant contributions to these debates. It argues that women‘s migration, and literary accounts of migration, are important to feminism, as is feminism to understanding migration. Key texts include Nervous Conditions by Tsitsi Dangarembga; The Unbelonging, by Joan Riley; Lucy, by Jamaica Kincaid; and No Language is Neutral, by Dionne Brand. I also draw on a number of other novels, poems and anthologies of migrant women‘s writings. The diversity of the texts by migrant women that form the basis of the thesis has shaped my understanding of the issues they raise; the breadth and variety of the writing calls for a wide range of critical approaches in order that the writing is, as far as possible, illuminated rather than constrained by any one critical model. I am committed throughout the thesis to a feminist approach which incorporates an attention to women‘s activism along with 'the theoretical'; and which takes seriously the personal/emotional implications both of the kinds of imbalances of power which many migrant women explore and resist in their writings, and of feminist theorising and practice. The thesis consists of six chapters, the middle four of which are organised into two pairs. I begin the thesis with a chapter looking at accounts of women‘s decisions and journeys of migration, and the personal, political and historical contexts in which their migration takes place. Chapters Two and Three, which are paired under the title 'Women and Place', examine the impact of migrant women‘s changing relationships with place, before and after migration, on their sense of home, belonging and identity. In Chapters Four and Five, I move on to address the significance of these writings in terms of feminist politics and contemporary debates about identity, difference and racism. I have paired the chapters under the common title 'Literary Activism' in order to highlight connections between reading, writing and political activism. In conclusion, the thesis looks at representations of women‘s emotional and bodily experiences of the liberatory and/or oppressive aspects of their migrations. It addresses the possibilities –or impossibilities—of migrant women living with, coming to terms with, and resisting their oppressions, both personally and politically. This final chapter brings together, and takes further, various issues addressed throughout the thesis, in terms of writers‘ portrayals of both the effects of migration on women‘s sense of themselves, and of their explorations and responses to the impact of migration.
4
de, Sousa Fernando Nuno. "Movement of radionuclides through unsaturated soils." Diss., Georgia Institute of Technology, 1985. http://hdl.handle.net/1853/17875.
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5
Gül, Mustafa. "WHEN THE DREAMS COME TRUE : THE CONSEQUENCES OF FREE MOVEMENT OF TURKS WITHIN EU." Thesis, Blekinge Tekniska Högskola, Sektionen för planering och mediedesign, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-1108.
Повний текст джерелаАнотація:
Immigration into Europe has always been at the center of EU’s agenda. With the candidacy of Turkey for entry into the EU, the issue of immigration is being discussed with a new intensity. That is why this paper aims to understand the dynamics that will govern Turkish migration into EU after membership and to provide a sound basis for its complicated nature. In order to do that, different theories of migration have been categorized at different levels of approaches and analyzed to understand the reasons for migration. To ground these theories in the reality of migration, the statistics on countries that joined the EU in 2004 and 2007 have been used. After identifying the reasons why citizens of these new member states migrate, prospective Turkish migration has been analyzed accordingly. It has been found out that the reasons for Turkish migration will be mostly the same as those for new member states’ citizens. As a result of this, it has been concluded that the prospective Turkish migration will be extremely diverse and complicated and that the directions of migration will not only be from Turkey to Europe but also from Europe to Turkey.
6
GÜL, Mustafa. "WHEN THE DREAMS COME TRUE : THE CONSEQUENCES OF FREE MOVEMENT OF TURKS WITHIN EU." Thesis, Blekinge Tekniska Högskola, Sektionen för planering och mediedesign, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-1115.
Повний текст джерелаАнотація:
Immigration into Europe has always been at the center of agenda of the EU. With the candidacy of Turkey, the issue of immigration is being discussed at an accelerating rate. That is why this paper aims to understand the dynamics behind the prospective Turkish migration into EU after membership and to provide a sound basis for its complicated nature. In order to do that, different theories of migration have been categorized at different levels of approaches and analyzed to understand the reasons for migration. To set the relationship between theory and reality of migration, the statistics on countries that joined the EU in 2004 and 2007 have been used. After identifying the reasons why citizens of these new member states migrate, the prospective Turkish migration has been analyzed accordingly. It has been found out that the reasons for Turkish migration will be mostly the same as those for new member states’ citizens. As a result of this, it has been concluded that the prospective Turkish migration will be so diverse and complicated and that the direction of migration will not only be from Turkey to Europe but also from Europe to Turkey.
7
Liu, Guofu. "The right to leave and return and Chinese migration law." Electronic version, 2005. http://epress.lib.uts.edu.au/dspace/handle/2100/341.
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8
So, Chin-Hung. "Economic development, state control, and labour migration of women in China." Thesis, University of Sussex, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.361403.
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9
Hoffmann, Sophia. "Disciplining movement : state sovereignty in the context of Iraqi migration to Syria." Thesis, SOAS, University of London, 2011. http://eprints.soas.ac.uk/14571/.
Повний текст джерелаАнотація:
In most academic writing on state sovereignty, it is considered as a special, abstract form of independent power. This thesis considers sovereignty from a historical and anthropological perspective, arguing that it is a certain form of social and political organisation through which the state's power is performed and maintained as natural. This organisation and maintenance rests on particular, powerful ideas, for example on the assumed unity of territory, government and population, and on certain values about what constitutes politics and a fulfilled human life. By analysing the management of Iraqi migrants in Damascus through state and humanitarian institutions, this thesis shows the daily-life bureaucratic and violent practices through which state sovereignty became a reality in this context. The analysis emphasises that state sovereignty exists as an imagined 'ideal', as reflected in international law or world maps, and as a much more complex, context-dependant, lived reality. The differences between the way that humanitarian agencies considered Iraqi migrants from the perspective of the 'ideal', and the way Syrian state institutions governed Iraqi migrants according to very different standards, highlighted this distinction. Methodologically, this thesis calls for, and attempts to provide, a hermeneutic approach to social inquiry, in which empirical evidence underpins arguments about theory. Ethnography and interviews in Syria were used to collect in-depth information about the lives of Iraqi migrants, and the interventions and programmes through which Iraqi migration was being managed, in 2009 and 2010.
10
Yong, Caleb Hoe-Kit. "Justice, legitimacy, and movement across borders : a political theory of international migration." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:7f94a135-778d-45cd-acdf-e5e15adba7f1.
Повний текст джерелаАнотація:
Existing moral reflection on immigration law and policy is caught in an impasse between (1) proponents of an individual right to free international migration and (2) proponents of a state’s right to control its borders. In Chapter 1, I examine arguments supporting an individual right to free international migration. I show that the case for this putative right cannot be settled solely by considering the strength of individuals’ interest in being able to cross international borders according to their choice. Rather, at a crucial point, the argument for an individual right to free migration turns on the truth of a particular conception of global justice. In Chapter 2, I examine arguments supporting a state’s right to control its borders. I contend that these arguments do not seek to defend the substantive justice of restrictive immigration policies, but rather the legitimacy of processes of political decision-making by which states unilaterally determine their own immigration policies. Abandoning this right-versus-right paradigm, I recast the debate by focusing on two distinct questions: (1) the question of justice in immigration, which substantively evaluates immigrant admission policy; and (2) the question of the legitimacy of immigration law enacted by procedures responsive only to states’ internal political decisions. I further propose that in articulating principles of justice in immigration, we should first develop a conception of global justice which will provide the background for our evaluation of immigration policy. In Chapter 3, I develop and defend a conception of global justice I call cooperation-based internationalism. I argue that co-citizens are joint participants in a scheme of cooperation which provides them with the social goods they need to lead autonomous lives. They therefore owe each other special duties of social justice. In addition, I argue for a duty of assistance which applies among all human persons globally. This duty requires developed states to assist developing states in establishing minimally just institutions. In Chapter 4, I develop a conception of justice in immigration against the background of cooperation-based internationalism. I argue that there is no requirement for states to allow open immigration. Nevertheless, I argue that co-citizens owe each other duties which impose significant moral constraints on immigration policy: states must (1) allow for family unification; (2) eschew policies that select immigrants based on criteria that unjustly call into question the fitness for citizenship of certain current members; (3) regulate labour immigration so that all current citizens benefit equally unless unequal gains benefit worse-off citizens. The duty of assistance is also imposes constraints on immigration policy. Developed states should (4) avoid immigration policies which cause brain drain harmful to international development and (5) admit and resettle refugees. In Chapter 5, I turn to the distinct question of the legitimacy of unilaterally-enacted immigration law. I argue that the application and enforcement of immigration law counts as a coercive exercise of political power which stands in need of justification. I examine the consent and natural duty of justice theories of political legitimacy, concluding that these influential theories cannot establish the legitimacy of immigration law. I conclude by considering the implications of the illegitimacy of immigration law for the evaluation of irregular migration.
11
Bourbeau, Philippe. "A study of movement and order : the securitization of migration in Canada and France." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/2840.
Повний текст джерелаАнотація:
This dissertation is about the movement of people and the system of order
underpinning the movement. In undertaking a comparative study of Canada and France
between 1989 and 2005, the study explores a widespread phenomenon that security
studies and migration scholars would have considered an anomaly only two decades ago:
understanding the movement of people as an existential security threat.
How is it that nation-states around the globe are cracking down on migration for
security reasons? How do we know if migration has been securitized - and which criteria
should we employed to guide our analysis? What are the social mechanisms at play in the
interaction between movement and order? Does a variation in levels of securitized
migration exist - and if so, what are the key determinants of the variation? These
questions are at the heart of the present study.
My argument is twofold. First, I contend that a constructivist perspective is useful in
gaining a better understanding of the social mechanisms involved in the securitization of
migration as it highlights discursive power, ideational factors, and cultural/contextual
elements. Second, I argue that securitization theory - the current benchmark in
securitization research - remains silent on the issue of variation in levels of securitized
migration. As such, securitization theory, as currently applied and organized, cannot
explain empirical findings of my study - a weak securitization in Canada versus a strong
securitization in France. Underscoring the necessity to amend securitization theory, I
investigate the impact of cultural factors - and especially the role of domestic audience -
to account for the variation.
12
Dossman, Bryant C. "Stopover Departure and Movement Behaviors of Migratory Songbirds." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1428055119.
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13
Wilkinson, R. C. "Migration in Lesotho : A study of population movement in a labour reserve economy." Thesis, University of Newcastle Upon Tyne, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.353449.
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14
Chadwick, Helen. "Movement between the Azores and the United States : emigration, return migration and community." Thesis, Lancaster University, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.422958.
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15
Tomar, Alok. "Tyrosine phosphorylation of villin effects on actin dynamics, cell morphology and cell migration /." View the abstract Download the full-text PDF version (on campus access only), 2006. http://etd.utmem.edu/ABSTRACTS/2006_008_tomar_index.html.
Повний текст джерелаАнотація:
Thesis (Ph.D.)--University of Tennessee Health Science Center, 2006.Title from title page screen (viewed on June 20, 2008 ). Research advisor: Seema Khurana, Ph.D. Document formatted into pages (xi, 154 p. : ill.). Vita. Abstract. Includes bibliographical references (p. 127-139).
16
Munevar, Steven. "Mechanics of Fibroblast Migration: a Dissertation." eScholarship@UMMS, 2003. https://escholarship.umassmed.edu/gsbs_diss/36.
Повний текст джерелаАнотація:
Cell migration involves complex mechanical interactions between cells or between cells and the underlying substrate. Using a newly developed technique, "traction force microscopy", I have been able to visualize the dynamic characteristics of mechanical forces exerted by migrating fibroblasts such as magnitude, direction, and shear. For NIH 3T3 fibroblasts, I found that the lamellipodium provides nearly all of the force necessary for cell migration. A high shear zone separates the lamellipodium from the remainder of the cell body, suggesting that they are mechanically distinct entities. The timing of the tractions at the leading edge, as well as the spatial distribution, bears no apparent relationship to concurrent local protrusive activities, yet changes in traction force patterns often precede changes in migration direction. In H-ras transformed cells I found isolated regions of weak, transient traction forces in pseudopods all along the cell that appeared to act against one another. The resulting shear pattern suggested that there were multiple disorganized mechanical domains. These results support a frontal towing model for cell migration where the dynamic traction forces at the leading edge served to actively pull the cell body forward. In H-ras transformed cells, the weak poorly coordinated traction forces coupled with weak cell substrate-adhesions were likely responsible for the abnormal motile behavior of these cells. To probe the mechanical interactions beneath various regions of migrating fibroblasts, a cell substrate inhibitor (GRGDTP peptide) was locally applied while imaging stress distribution on the substrate utilizing traction force microscopy. I found that both spontaneous and GRGDTP induced detachment of the trailing edge resulted in extensive cell shortening with no change in overall traction force magnitude or cell migration. Conversely, leading edge disruption resulted in a dramatic global loss of traction forces pnor to any significant cell shortening. These results suggested that fibroblasts transmit their contractile forces to the substrate through two distinct types of adhesions. Leading edge adhesions were unique in their ability to transmit active propulsive forces whereas trailing end adhesions created passive resistance during cell migration and readily redistributed their loads upon detachment. I have also investigated how fibroblasts regulate traction forces based on mechanical input. My results showed that stretching forces applied through the flexible substrate induced increases in both intracellular calcium concentration and traction forces in fibroblasts. Treatment with gadolinium, a well known stretch-activated ion channel inhibitor, was found to inhibit both traction forces and cell migration without inhibiting cellular spread morphology or protrusive activities. Gadolinium treatment also caused a pronounced decrease in vinculin and phosphotyrosine concentrations from focal adhesions. Local application of gadolinium to the trailing region had no detectable effect on overall traction forces or cell migration, whereas local application to the leading edge caused a global inhibition of traction forces and an inhibition of migration. These observations suggest that stretch activated entry of calcium ions in the frontal region serves to regulate the organization of focal adhesions and the output of mechanical forces. Together my experiments elucidate how fibroblasts exert mechanical forces to propel their movements, and how fibroblasts utilize mechanical input to regulate their movements.
17
Rakeman, Andrew Steven. "The role of Nap1-mediated cell migration : during morphogenesis and axis specification in the mouse /." Access full-text from WCMC:, 2006. http://proquest.umi.com/pqdweb?did=1296088091&sid=9&Fmt=2&clientId=8424&RQT=309&VName=PQD.
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18
Collyer, Michael. "Explaining change in established migration systems : the movement of Algerians to France and Britain." Thesis, University of Sussex, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.247973.
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19
Liu, Wei. "Tetraspanin KAI1/CD82 inhibits cell migration-related cellular events via reorganizing actin network." View the abstract Download the full-text PDF version, 2007. http://etd.utmem.edu/WORLD-ACCESS/Liu/2007-030-Liu.pdf.
Повний текст джерелаАнотація:
Thesis (M.S. )--University of Tennessee Health Science Center, 2007.Title from title page screen (viewed on July 17, 2008). Research advisor: Xin Zhang, Ph.D. Document formatted into pages (xv, 197 p. : ill.). Vita. Abstract. Includes bibliographical references (p. 159-197).
20
Gu, Yu. "The molecular and genetic mechanisms of directional cell migration regulated by electric fields." Thesis, University of Aberdeen, 2010. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=165863.
Повний текст джерелаАнотація:
Directed cell migration is essential in both physiological and pathological situations. Many guidance cues have been extensively investigated in the past decades, to be able to regulate directional cell migration, including chemical, physiological and haptotactic cues. In the past years, we have focused on the roles of physiological electric field in the guidance of directed cell migration. It is well accepted that physiological electric fields exist both extracellularly and intracellularly with different functions, and interestingly, endogenous EFs exist in not only physiological but also pathological events. For instance, the existence of a small current in developing embryos which is also known as the endogenous electric field has been tested, such as the blastopore in Xenopus, chicken embryos, and etc. It has been also demonstrated that endogenous electric fields exist at the wound edges of injured cornea and skin. Physiological electric field is among many other guidance cues controlling an important cellular response – directed cell migration in response to stimuli, a phenomenon named electrotaxis or galvanotaxis. We and others have extensively demonstrated that physiological EFs could control directional cell migration, and that several signalling pathways are required for the regulation of such event. In the current study, we used Dictyostelium model to further explore the molecular and genetic mechanisms of how electrotaxis is controlled, by extensively investigating candidate molecules and genes in such regulation. We found that PI3K, PTEN and Ras signalling pathways are largely involved in the regulation of electrotaxis, Ras plays more dominant roles in this event in comparison with PI3K and PTEN, which only partially contributed towards the electrotactic response of the Dictyostelium cells. Asymmetric redistribution of signalling molecules are shown to play an essential role in the initiation and maintenance of the electrotactic response of the cells.
21
Chubb, Jonathan Robert. "An analysis of the role of the RasS protein in dictyostelium cell movement and endocytosis." Thesis, University College London (University of London), 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.311944.
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22
Francis, Monika K. "Regulation of GRAF1 membrane sculpting function during cell movement." Doctoral thesis, Umeå universitet, Institutionen för medicinsk kemi och biofysik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-111213.
Повний текст джерелаАнотація:
All eukaryotic cells rely on endocytic events to satisfy a constant need for nutrient and fluid uptake from their surroundings. Endocytosis-dependent turnover of cell surface constituents also serves to control signal transduction and establish morphological changes in response to extracellular stimuli. During endocytosis, distinct protein machineries re-sculpt the plasma membrane into vesicular carriers that enclose molecules that are to be taken up into the cell. Besides those produced from the canonical clathrin-mediated endocytic machinery, it is becoming increasingly clear that other membrane carriers exist. The indisputable connection between the function of these uptake systems and various disease states, highlights why it is so important to increase our knowledge about the underlying molecular machineries. The aim of this thesis was therefore to characterise the function of GRAF1, a protein suggested to be a tumour suppressor due to that the gene has been found to be mutated in certain cancer patients. My work focused on understanding how this protein operates during formation of clathrin-independent carriers, with possible implications for disease development. Previous in vitro studies showed that GRAF1 harbours a GTPase activating domain to inactivate Rho GTPase Cdc42, a major actin cytoskeleton regulator. Herein, microscopy based approaches used to analyse HeLa cells demonstrated the importance of a transient interaction between GRAF1 and Cdc42 for proper processing of GRAF1-decorated carriers. Although GRAF1-mediated inactivation of Cdc42 was not vital for the budding of carriers from the plasma membrane, it was important for carrier maturation. In addition, studies of purified GRAF1 and its association with lipid bilayers identified a membrane scaffolding-dependent oligomerisation mechanism, with the ability to sculpt membranes. This was consistent with the assumption that GRAF1 possesses an inherent banana shaped membrane binding domain. Remarkably, this function was autoinhibited and in direct competition with the Cdc42 interaction domain. Finally, other novel GRAF1 interaction partners were identified in this study. Interestingly, many of these partners are known to be associated with protein complexes involved in cell adherence, spreading and migration. Although never actually seen localising to mature focal adhesions that anchor cells to their growth surface, dynamic GRAF1 carriers were captured travelling to and from such locations. Moreover, GRAF1 was recruited specifically to smaller podosome-like structures. Consistent with this, the tracking of GRAF1 in live cells uncovered a clear pattern of dynamic carrier formation at sites of active membrane turnover – notably protrusions at the cell periphery. Furthermore, the silencing of GRAF1 gave rise to cells defective in spreading and migration, indicating a targeting of GRAF1-mediated endocytosis to aid in rapid plasma membrane turnover needed for morphological changes that are a prerequisite for cell movement. Since these cells exhibited an increase in active Rab8, a GTPase responsible for polarised vesicle transport, the phenotype could also be explained by a defect in Rab8 trafficking that results in hyperpolarisation. Taken together, the spatial and temporal regulation of GRAF1 membrane sculpting function is likely to be accomplished via its membrane binding propensity, in concert with various protein interactions. The importance of GRAF1 in aiding membrane turnover during cell movement spans different functional levels – from its local coordination of membrane and actin dynamics by interacting with Cdc42, to its global role in membrane lipid trafficking.
23
Holmes, Jr Walter. "The Influence of Economic Factors on Black Migration to and within Metropolitan Atlanta." Digital Archive @ GSU, 2006. http://digitalarchive.gsu.edu/anthro_theses/12.
Повний текст джерелаАнотація:
Since the Civil Rights Movement in the 1960s, Atlanta has had a reputation in the African-American community as a place of endless opportunity. This reputation, along with "boosterism" has attracted large numbers of African-American migrants into the Atlanta area. While economic factors no doubt play a role in the decision to migrant to Atlanta for most African-Americans, there are other social factors that "push" and "pull" African-Americans to Atlanta. This thesis looks at the "push" and "pull" factors of African-American migration into Atlanta, and within the Atlanta region. Most of the data in this thesis came from information obtained from two survey questionnaires administered to African-Americans in Metropolitan Atlanta in late 2004. The results of the thesis suggest that economics factors play a larger role in inter-metropolitan migration than intra-metropolitan migration.
24
Ghillani, Francesca. "Migrating bodies : the effects of transnational movement on women's bodily practices in later life." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:bddae074-798e-490e-8079-85d9dfed9423.
Повний текст джерелаАнотація:
When approaching old age, women's bodies face functional, esthetical, and reproductive changes that can represent a source of discontinuity in their lives. Moreover, women are constantly exposed to the social pressure of compelling stereotypes regarding their body image and functionality: from media to medical pamphlets, the feminine body is subjected to deep social observation and regulation. Given that the relationship between ageing and the body is socially mediated, how does the encounter with a different culture have an impact on it? In this research, migration has been employed to analyse the cultural aspects of bodily practices. Migration can be described as an embodied experience, in which a body is first displaced and then emplaced in two social locations - the community of origin and the culture of destination - a circumstance known as transnationalism. Interviews were carried out with women aged between 59 and 74, divided in three groups: RESIDENTS: women who were born in an Italian village and had lived all their lives there; MIGRANTS: women who moved from the same village to London and are still living in England; RETURNED: migrants who moved back to the village permanently after living in London. Four dynamics were identified to regulate the interplay of ageing, bodily practices, and migration: (i) Assimilation: encountering and integrating with the new community; (ii) Acculturation: observing, learning, and sometimes adopting norms and values of the culture of destination; (iii) Acceptance: the binding agent between body and self during the recognition of ageing; (iv) Adjustment: the set of changes in their habits that women put in place in order to accommodate transformations in their bodies and maintain social inclusion. Moreover, a new conceptualization of transnationalism is proposed, which helps to frame how, after many years of negotiation between the culture of origin and the one of settlement, migrants disengage from social normativity, gaining an augmented sense of agency.
25
Jesuthasan, Suresh. "Two modes of cell movement in the zebrafish embryo : neural crest cell migration and epiboly." Thesis, University of Oxford, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240465.
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26
Bonnet-Lebrun, Anne-Sophie. "Intraspecific variation in environmental and geographic space use : insights from individual movement data." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/275584.
Повний текст джерелаАнотація:
Species’ ranges arise from the interplay between environmental preferences, biotic and abiotic environmental conditions, and accessibility. Understanding of – and predictive models on – species distributions often build from the assumption that these factors apply homogenously within each species, but there is growing evidence for individual variation. Here, I use movement data to investigate individual-level decisions and compromises regarding the different costs and benefits influencing individuals’ geographic locations, and the species-level spatial patterns that emerge from these. I first developed a new method that uses tracking data to quantify individual specialisation in geographic space (site fidelity) or in environmental space (environmental specialisation). Applying it to two species of albatrosses, I found evidence of site fidelity but weak environmental specialisation. My results have implications for how limited research efforts are best-targeted: if animals are generalists, effort are best spent by understanding in depth individual patterns, i.e., better to track fewer individuals for long periods of time; whereas if animals tend to be specialists, efforts should be dedicated to tracking as many individuals as possible, even if for shorter periods. I then investigated individual migratory strategies and their drivers in nine North American bird species, using ringing/recovery data. I found latitudinal redistribution of individuals within the breeding and non-breeding ranges that generally did not follow textbook patterns (‘chain migration’ or ‘leapfrog migration’). Migratory individuals tend to trade off the benefits of migration (better tracking of climatic niche; better access to resources) and its costs (increasing with migratory distance). I found that birds are more likely to remain as residents in areas with warmer winter temperatures, higher summer resource surpluses and higher human population densities (presumably because of a buffering effect of urban areas). Overall, my results highlight the importance of considering individual variation to understanding the ecological processes underpinning species’ spatial patterns.
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Tivig, Andrea. "Moving Beyond Borders: Freedom of Movement in and between States." Thesis, Harvard University, 2014. http://nrs.harvard.edu/urn-3:HUL.InstRepos:13064992.
Повний текст джерелаАнотація:
Freedom of movement is a matter of individual freedom rather than only a tool for addressing global distributive injustice. Freedom of movement has normative value whether or not it concerns interstate borders. Migration, in the sense of interstate relocation, is a subcategory of movement, which can involve travel, temporary relocation or permanent relocation--a brief walk, or a move halfway around the world.
My argument about freedom of movement has two essential elements: first, that freedom of movement has noninstrumental value, not only instrumental value, and that it deserves more weight and attention than liberals usually give it; and second, I justify this and its implications by emphasizing the cross-scalar connections between local and global movement and showing that the difference between internal and interstate movement is not as significant as is usually assumed to be. Freedom of movement is proposed as a unit of concern and a matter of degree, with principles and restrictions functioning in parallel at both levels. The cohesive account of liberal freedom of movement offers the chance to think about people moving and staying as one overarching category. This challenges the characterization of migration as anomalous and captures the chance to treat like cases alike.
Chapter Two makes an argument for freedom of movement as a noninstrumental liberal value to which the normative weight of the instrumental value of freedom of movement is added. Chapter Three explores small-scale movement in the countryside and the city and proposes a stronger valuation of freedom of movement particularly vis-à-vis private property rights. Chapter Four considers theoretical and legal arguments involving intrafederal movement in the United States and Germany and compares intrafederal exit to exit from the state. Chapter Five considers several free movement regimes in Europe to draw out the similarities between interstate, intrafederal, and local movement. Throughout these chapters I show that there are many legitimate ways in which freedom of movement can and should be restricted at the internal level, but this is not sufficient to conclude that interstate movement can be arbitrarily restricted.Government
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Seetharam, Divya. "Molecular basis of HDL-mediated endothelial cell migration and reendothelialization." Access to abstract only; dissertation is embargoed until after 12/20/2006, 2005. http://www4.utsouthwestern.edu/library/ETD/etdDetails.cfm?etdID=139.
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Cruz, Sebastian M. [Verfasser]. "At-sea movement and migration of the nocturnal swallow-tailed gull (Creagrus furcatus) / Sebastian M. Cruz." Konstanz : Bibliothek der Universität Konstanz, 2013. http://d-nb.info/1088795684/34.
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D'Onofrio, Alexandra. "Reaching horizons : exploring past, present and future existential possibilities of migration and movement through creative practice." Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/reaching-horizons-exploring-past-present-and-future-existential-possibilities-of-migration-and-movement-through-creative-practice(3c74de7b-f1f9-4fb8-a01d-929c8986e54a).html.
Повний текст джерелаАнотація:
Migration has become a topical theme both in academia and in public discourses across the media which have contributed to create a highly political and visual 'migrant subject'. However, the highly mediatized figure of the migrant has left crucial aspects of migration underrepresented and unrecognised. What is normally concealed and left to the margins of public debate is the individual experience of the protagonists, their imaginative lifeworlds and the complexity of their stories. This practice-based research has centred its inquiry on the relationship between the lived experiences and the imagination of past, present and future existential possibilities, by engaging three Egyptian migrants through the creative processes of theatre improvisations, storytelling practices, participatory photography, collaborative filmmaking and animation. It recognizes the fundamental role that imagination and future existential possibilities play in peopleâs perceptions of reality, in their decisions and actions, and finally in the way they narrate their experiences. In order to better understand how individuals make their choices, interact with each other, understand themselves and the world around them, I have argued that we need to take into account their biographies and imaginative inner lives as the ways people retell their stories allow space for contradiction, feelings of ambivalence and uncertainty, unlaced and unfinished thoughts and existential dilemmas. Imaginative realms of existence are ever-changing and ungraspable, posing a challenge to conventional methodologies in the social sciences which rely heavily on observation, interviews and text. The thesis is divided into two parts. By using the ethnographic material that emerged during fieldwork and from the creative processes, in the first part I look at the role imagination and the future play in Aliâs, Mohamedâs and Mahmoudâs relationships to their origins, and to their decisions and experiences of illegally crossing the Mediterranean Sea in order to reach Milan (Italy). The second part describes and reflects upon the performative and audio-visual collaborative practices that involved my participants in producing their own narrations and theoretical reflections on their experiences, aspirations and memories. It is thanks to the âsubjunctive possibilitiesâ enabled by performative improvisations, creative storytelling and the animation that my participants and I could explore their mnemonic and imaginative processes. Finally, the thesis concludes by arguing for social research to engage participants in more collaborative and creative practices in the study of migration, as a necessary way of involving the protagonists in producing the questions and counter-narratives that reclaim their acts of struggle and their creative imaginative abilities to contrast objectifying political discourses and exclusionary legal and bureaucratic procedures.
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Brathwaite, George Christopher. "CARICOM and the politics of migration : securitisation and the free movement of community nationals in Barbados." Thesis, University of Newcastle upon Tyne, 2014. http://hdl.handle.net/10443/2561.
Повний текст джерелаАнотація:
This thesis seeks to understand how the ‘free movement of CARICOM nationals’ (FMCN) and intra-regional migration have become securitised in Barbados. The key aim of the thesis is to understand the social facts constitutive of the FMCN in Barbados. The thesis presents data on key securitising actors and audiences in Barbados. It analyses how Caribbean Community (CARICOM) migrants are understood to be posing threats and dangers to the Barbadian society and/or state. The processes, interactions, and discursive practices that lead to these conditions of security/insecurity are then examined in more detail. The thesis, on the basis of an instrumental case study of Barbados, advances social constructivism and the Copenhagen School’s concept of securitisation as the most appropriate theoretical framework for gaining an understanding on the FMCN and intra-CARICOM migration dynamics. Primary data are drawn from a selection of methods incorporating elite interviews with key state/institutional leaders and the media. This method is complimented with documentary research in the format of parliamentary debates; government speeches and reports; books and journals; communiqués; and newspaper articles. The thesis engages with critical discourse analysis in order to gain analytical purchase on agency within domestic and international structures. It argues that market forces, material conditions, cultural constraints, and technological forces are crucial indicators for any reading of the securitisations taking place in the transnational and national spaces of CARICOM. The key findings and analyses show significant challenges for Barbados regarding perceptions of national versus regional identities. With the functioning of the FMCN, the social construction of fear and mistrust leads to grave misunderstandings among multiple actors. The thesis’ original contribution stems from analysing the securitisation dynamics underpinning FMCN and intra-CARICOM migration in Barbados and CARICOM.
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McReynolds, Mark Stephen. "Patterns of Seasonal Variation in Diet, Abundance, and Movement of the Scarlet Macaw (Ara macao) in southern Belize." Antioch University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=antioch1357153100.
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Ілляшенко, Сергій Миколайович, та Є. І. Сахацька. "Міграція робочої сили в Україні". Thesis, ТОВ "Планета-Прінт", 2020. http://repository.kpi.kharkov.ua/handle/KhPI-Press/49089.
Повний текст джерелаАнотація:
Досліджено процеси міграції робочої сили в Україні. Визначено заходи щодо її регулювання.The processes of migration of labor force in Ukraine are investigated. Measures to regulate it have been determined.
34
Lai, Yun-Ju. "Role of TRIP6 in LPA-induced cell migration." Thesis, Birmingham, Ala. : University of Alabama at Birmingham, 2007. https://www.mhsl.uab.edu/dt/2009r/lai.pdf.
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Friberg, Jonsson Olga. "God has forgotten about us Roma- a qualitative study of the Romanian Roma migration to Sweden and the migration as a political action." Thesis, Malmö högskola, Fakulteten för kultur och samhälle (KS), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-22666.
Повний текст джерелаАнотація:
This qualitative study illustrates the Romanian Roma migration within the framework of the principle free movement in connection to Hannah Arendt’s concept political action. Political action is the main ability of human beings, namely to act, which takes place among people in the public realm to create power. This will be studied in conjunction with the migration as an enactment of rights. The study presents the increasing migration towards Sweden and Western Europe within the free movement, areas of discrimination in Romania concerning the minority group as well as articles with portraits of Romanian Roma migrants. With inspiration from both discourse analysis and content analysis the aim was to study the chosen texts and understand the migration in light of Arendt’s concept. The conclusion is that the migration of the minority group can be claimed to be a political action since the group can be argued to act together as a collective in the public realm to be recognised. Romanian Roma migrants also need political action to regain their ability to act which has been lost, and to act for improvement as an enactment of rights.
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Regout, Sybille. "European Union, States and Markets. The transitional periods to the free movement of workers for the 2004 EU enlargement." Doctoral thesis, Universite Libre de Bruxelles, 2016. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/227955.
Повний текст джерелаАнотація:
A l'approche de l'élargissement de l'UE de 2004, les Etats membres de l'Union européenne ont adopté des dispositions transitoires à la libre circulation des travailleurs, à savoir une période dérogatoire de sept ans durant laquelle ils pouvaient continuer à appliquer leur législation relative aux permis de travail. Initialement isolée, l'Allemagne est parvenue en quelques années à imposer sa préférence à ce sujet à l'ensemble de l'Union européenne. Cette thèse fait trois constats. Le premier est que si la libre circulation des travailleurs se situe à l'intersection des politiques d'élargissement, de marché du travail et de politique migratoire, c'est la composante migratoire qui a dominé la prise de décision. Plus précisément, les dispositions transitoires étaient perçues comme un outil de migration sélective afin de choisir les profils jugés comme étant les plus désirables - et ce même si les désirs politiques ne correspondaient pas à la réalité du marché. La seconde est qu'il n'y a eu que très peu d'Européanisation et d'harmonisation dans ce processus de décision, les Etats membres dominant les négociations. Enfin, le troisième constat est que les acteurs politiques ont principalement pris en compte des considérations électorales, et non des considérations économiques, dans l'adoption de ces dispositions transitoires.Doctorat en Sciences politiques et sociales
info:eu-repo/semantics/nonPublished
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Vogt, Daniel. "ARHGAP4 is a spatially regulated RhoGAP that inhibits NIH/3T3 cell migration and dentate granule cell axon outgrowth." Connect to text online, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=case1183470294.
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Saxena, Ankur. "Cell migration and survival pathways in cardiac development and disease." Access to abstract only; dissertation is embargoed until after 12/20/2006, 2005. http://www4.utsouthwestern.edu/library/ETD/etdDetails.cfm?etdID=138.
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Ericson, von Bahr Vera. "Sacred Resistance : Exploring the Roles of Religious Organizations in the Refugee Movement “Lampedusa in Hamburg” 2013-2014." Thesis, Södertörns högskola, Religionsvetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-41312.
Повний текст джерелаАнотація:
This study explores the roles of religious organizations in the refugee movement “Lampedusa in Hamburg”, in Hamburg, Germany during 2013 and 2014. “Lampedusa in Hamburg” consisted of approximately 300 refugees who had come from Libya, and decided to fight for their right to stay in Germany. Early on, religious organizations became important supporters to the movement, by providing the members food and shelter. By analyzing archival material and interviews with two religious representatives, this thesis investigates the involvement of religious organizations, their collaborations, and the outcomes produced by their work during the protests, using theories connected to secularization and religion and migration. The analysis shows that the involvement of religious organizations in the “Lampedusa in Hamburg”- movement is an example of how faith-based actors in the West are standing up against authorities and objecting migration policies. Their work, collaborations and impact were clearly shaped by national ties with the German state and their position in society. Further, local dynamics formed the roles of the religious organizations, especially in the case of the St. Pauli church – one of the most central religious actors – located in St. Pauli, a block with a long history of protests. During the Lampedusa in Hamburg-movement, processes operating at global, national, and local scales met, exposing the complexities of the roles that religious organizations take on, as they become involved in migrant processes in Western Europe today.
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Zajková, Zuzana. "Movement ecology in pelagic seabirds." Doctoral thesis, Universitat de Barcelona, 2020. http://hdl.handle.net/10803/668688.
Повний текст джерелаАнотація:
Movement is a fundamental component of behaviour and thus both are inextricably linked. Variation in movement patterns usually reflects different behaviours, including those most glaring, such as foraging, dispersal, migration, social interaction, mate search or escaping from predators. The way individuals allocate their time budget to different behaviours within circadian rhythm and over the annual life cycle will ultimately provide knowledge about evolutionary processes and adaptive capacity, also important to proper conservation actions of endangered species. Among highly mobile marine megafauna, seabirds represent suitable model species to address key questions about movement and behaviour. The study of year-round movements of seabirds has been addressed over the last 20 years with the wide deployment of light-level geolocators equipped with saltwater immersion sensors. However, wet-dry data provided by such loggers seem underused so far despite their usefulness to provide important insights on a variety of dimensions of seabird ecology. The main aim of this thesis was to provide new insights into the factors shaping seabird behaviour. The thesis encompasses several aspects of seabird at-sea ecology of 4 different species spread over the Atlantic Ocean: Boyd’s shearwater (Puffinus boydi), Common tern (Sterna hirundo), Atlantic petrel (Pterodroma incerta) and Cory’s shearwater (Calonectris borealis). In Chapter 1 we reveal the timing of major events over the annual life cycle, migratory routes and place on the map the non-breeding areas of a little-known tropical seabird endemic to Cape Verde Islands, the Boyd’s Shearwater. We show that Boyd's shearwaters
perform longitudinal migrations to the oligotrophic central North Atlantic Ocean for the non-breeding season, in contrast with closely-related taxa that rely on most productive waters. In Chapter 2, we show that Common terns breeding in continental Europe spread over the West African coast for wintering, but females winter further north and use offshore waters whereas males winter further south and remain nearby the coastline. Behavioural budgets of Common terns were shaped within circadian and circa-annual rhythms. In Chapter 3 we describe in detail the phenology of the Atlantic petrel, showing that breeding success likely shapes the timing of major life-history events and behavioural patterns year round. We did find evidence of carry-over effects, since failed breeders advanced their post-breeding migration, remained longer in the wintering area, and advanced pre-breeding migration comparing to successful breeders. Breeding success did not affect the selection of wintering areas, as all birds relied on the South American shelf slope during different stages of the annual cycle. In Chapter 4, we demonstrate how geolocator-immersion loggers constitute a powerful and irreplaceable source of information to study seabird behaviour. We present a novel approach to infer a diverse array of behaviours based uniquely on wet-dry data, built upon a set of state-of-the-art unsupervised machine learning algorithms that reduce multidimensional data to a bidimensional behavioural space, from which different behaviours can be drawn. We applied the protocol on wet-dry data from Cory’s shearwater. Through these means, we can inspect in great detail and from manifold perspectives the behavioural patterns at individual and population level, highlighting how seasonal constraints shape
behavioural budgets and behavioural strategies. We use data visualization tools such as actograms and behavioural landscapes to get new insights, highlighting that such tools constitute an effective method to visualize behaviour of seabirds inferred from wet-dry data from manifold perspectives. Geolocator-immersion sensors currently remain as the most cost-effective balanced tracking devices to track seabird species over the entire annual cycle while ensuring the welfare of tagged individuals. Thus, results compiled in this thesis should encourage researchers to incorporate the use wet-dry data within hypothesis-driven frameworks, which surely would contribute to increase our knowledge of seabird ecology at sea.El movimiento es un componente fundamental del comportamiento animal, estando ambos íntimamente entrelazados. Variaciones en los patrones de movimiento normalmente reflejan cambios de comportamiento, incluyendo aquellos más conspicuos como la búsqueda de alimento, la dispersión, la migración, las interacciones sociales, la búsqueda de pareja o la huida ante depredadores. La forma en la que los patrones comportamentales se ajustan en el tiempo de acuerdo a los ritmos circadianos y a lo largo del ciclo anual puede ayudarnos a entender, en última instancia, los procesos evolutivos y la capacidad de adaptación de las poblaciones animales, algo también importante de cara al desarrollo de medidas de conservación de especies amenazadas. Las aves marinas representan un modelo especialmente adecuado para el estudio de la ecología comportamental y del movimiento. Estudiar los movimientos de las aves marinas en mar abierto ha sido posible en las dos últimas décadas gracias a la normalización en el uso de geolocalizadores por niveles de luz. Aunque buena parte de los modelos de geolocalizador es capaz de registrar datos de conductividad en agua salada (seco/húmedo), esta información parece infrautilizada a la luz de la literatura publicada. Sin embargo, los datos de conductividad son enormemente útiles para el estudio de multitud de aspectos sobre la ecología de las aves marinas. Esta tesis aborda diferentes aspectos de la ecología en mar abierto de 4 especies de aves marinas del océano Atlántico: la pardela chica de Cabo Verde (Puffinus boydi), el charrán común (Sterna hirundo), el petrel atlántico (Pterodroma incerta) y la pardela cenicienta (Calonectris borealis). En el Capítulo 1 revelamos la fenología, rutas migratorias y área de invernada de una especie tropical de pequeño tamaño, la pardela de Cabo Verde, endémica de dicho archipiélago. A diferencia de especies cercanas, los individuos de esta especie realizan una migración longitudinal hasta las aguas oligotróficas del centro del Atlántico Norte. En el Capítulo 2, mostramos que los charranes comunes que crían en Europa migran hasta la costa oeste de África para invernar, aunque las hembras se quedan más al norte y en ambientes más marinos, y los machos más al sur y en ambientes costeros. El comportamiento en ambos sexos parece regulado por ritmos circadianos y anuales. En el Capítulo 3, desgranamos la fenología del petrel Atlántico, una especie endémica del archipiélago de Tristán da Cunha, mostrando que el éxito reproductor probablemente moldea la sucesión de eventos fenológicos y los patrones de comportamiento. Incluso encontramos evidencias de efectos arrastrados, puesto que los animales que fracasaron en la cría adelantaron la migración, permanecieron más tiempo en la zona de invernada, y retornaron antes a las colonias de cría. Tanto los animales que tuvieron éxito como los que fracasaron en la cría invernaron en aguas de la plataforma continental de América del Sur y Patagonia. En el Capítulo 4, presentamos un nuevo protocolo analítico basado en algoritmos de aprendizaje automático que utiliza únicamente datos de conductividad. Mediante su aplicación sobre datos de pardelas cenicientas, demostramos que los datos de conductividad constituyen una poderosa herramienta para el estudio de las aves marinas, permitiendo desglosar a un nivel sin precedentes su comportamiento a diversas escalas: espacial (de viajes cortos a migraciones anuales), temporal (de días a años) y poblacional (de individuos a poblaciones). El análisis también nos permite resaltar los diferentes elementos que moldean el comportamiento animal a diferentes escalas temporales, utilizando para ellos potentes herramientas de visualización de datos como los actogramas. El conjunto de resultados expuestos en esta tesis debe alentar a los investigadores a utilizar más frecuentemente los datos de conductividad, lo cual contribuiría a aumentar nuestro conocimiento sobre la ecología de las aves marinas.
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Sardadvar, Sascha. "Regional Economic Growth and Steady States with Free Factor Movement: Theory and Evidence from Europe." WU Vienna University of Economics and Business, 2015. http://epub.wu.ac.at/4548/1/Sardadvar_ePub_1.pdf.
Повний текст джерелаАнотація:
This paper develops a spatial theoretical growth model in order to study the impact of physical and human capital relocations on the growth of open economies. Analytical and simulation results show how the respective neighbours determine an economy's development, why convergence and divergence may alternate in the medium-run, and that interregional migration as a consequence of wage inequalities causes disparities to prevail in the long-run. The empirical part applies spatial econometric specifications for European regions on the NUTS2 level for the observation period 2000-2010. The estimations underline the importance of human capital endowments and its relation with spatial location. (author's abstract)Series: Working Papers in Regional Science
42
Erlandsson, Anna. "Neural Stem Cell Differentiation and Migration." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl.[distributör], 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-3546.
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Smits, Karen. "The Quest to Retain Teachers: One School System's Story of Teacher Movement." Digital Archive @ GSU, 2009. http://digitalarchive.gsu.edu/eps_diss/45.
Повний текст джерелаАнотація:
ABSTRACT THE QUEST TO RETAIN TEACHERS: ONE URBAN-SUBURBAN SCHOOL SYSTEM’S STORY OF TEACHER MOVEMENT by Karen Smits Recent data on teacher attrition indicate that approximately 15 percent of teachers either leave the profession or move from one school to another each year. The attrition rate is highest for teachers new to the profession with 30-50 percent leaving within five years. High rates of attrition are a contributing cause of various educational problems including reduced student achievement, teacher shortages, declining teacher morale, and organizational discontinuity. The purpose of this study was to examine the reasons why teachers choose to leave the profession or move to another school from one year to the next. A qualitative case study was conducted to explore the reasons teachers from one urban-suburban school system voluntarily resigned at the end of one school year and what changes could have been made to keep them from leaving. The study answers three questions: Why do teachers leave? Why do some move to other schools while other teachers leave the profession? What could keep teachers from leaving? Data were collected using exit questionnaires, exit interviews, and semi-structured interviews of teachers leaving after the 2006-2007 school year. Data were analyzed using both deductive and inductive methods. Teachers who participated in this study made the decisions to move or leave for two primary reasons: administrative support and new opportunities. Administrative support took many forms and was described in a variety of ways including the following: administrative visibility, communication, use of time, support with student behavior, workload, implementation of new initiatives, and school climate. Teachers who left for new prospects were seeking different teaching opportunities or a better chance of moving into administration. The greatest difference between the teachers who moved and those who left the profession was hope. Teachers who moved to another school system believed the situation would be better elsewhere. Teachers who left the profession saw the struggles they endured as likely to occur in any teaching situation. Teachers indicated that they may have considered staying if they had received more administrative support, experienced better working conditions, had more supportive mentors, or had a teacher advocate who could have intervened on their behalf.
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Rubtsov, Anatoly V. "Regulation of marginal zone B cell migration in the primary IgM antibody response /." Connect to full text via ProQuest. Limited to UCD Anschutz Medical Campus, 2007.
Знайти повний текст джерелаАнотація:
Thesis (Ph.D. in Immunology) -- University of Colorado Denver, 2007.Typescript. Includes bibliographical references (leaves 146-169). Free to UCD affiliates. Online version available via ProQuest Digital Dissertations;
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Weithman, Chelsea E. "Piping Plover (Charadrius melodus) demography, behavior, and movement on the Outer Banks of North Carolina." Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/89915.
Повний текст джерелаАнотація:
The Piping Plover (Charadrius melodus) is an imperiled shorebird that inhabits sandy beaches along the North American Atlantic Coast. The species' decline has been attributed to habitat loss, disturbance, and predation throughout its range, although most conservation efforts have focused on increasing reproductive output during the breeding season. On the coast of North Carolina, Piping Plovers breed in areas with large amounts of recreational and tourism use. Beach recreation is known to reduce nest success, chick survival, and potentially fitness in other parts of the species' range. To reduce potential negative effects from human activities on breeding Piping Plovers, managers close areas to pedestrian and vehicle access using exclusion buffers delineated by symbolic fencing. However, the reproductive success and population size of Piping Plovers in parts of North Carolina has not appeared to increase as a result of these management strategies, despite the importance of the park and its protections to these birds on their southward migration in the fall.
To understand how disturbance and attempts to mitigate it affected plover demography, we examined Piping Plover population dynamics, brood movement, and migration in North Carolina from 2015–2017. We monitored 46 nests and 19 broods, and we used a logistic exposure nest survival model and Cormack-Jolly-Seber model to estimate reproductive success. We uniquely banded 77 adults and 49 chicks to understand annual survival and fidelity rates using a live encounter mark-recapture model. During the pre-fledge period, we observed movements of Piping Plover broods, and we gathered information on their environment that may affect their behavior. We recorded 191 brood locations, collected 132 focal chick behavior samples, and 113 potential disturbance environmental samples. We used multiple linear regression to evaluate several hypotheses regarding daily and hourly brood movement rates. We also conducted 22 migratory surveys after the breeding season in 2016 at an area in Cape Hatteras National Seashore thought to be used by large numbers of south-bound migrating Piping Plovers. We used integrated Jolly-Seber and binomial count models on resighting and count data to estimate stopover superpopulation and stopover duration of migrating birds based on their breeding region of origin.
Annual survival of adults from North Carolina (x ̅ = 0.69, SE = 0.07) was not different from another population on Fire Island, New York (x ̅ = 0.73, SE = 0.04), but the North Carolina population annually had low reproductive success, primarily due to low rates of chick survival. As a result, the North Carolina population was predicted to decline during the study period (λ<1 each year). Historically this population has not met the estimated rate of reproductive output needed for a stationary population (1.07 chicks per pair, SE = 0.69); therefore, it is likely the population is sustained by immigration from an unknown source. Daily (x ̅ = 71.5m/24hr) and hourly (x ̅ = 183.3m/hr) brood movements each had considerable variation (Daily: SD = 70.6, range = 0.0–327.2m; Hourly: SD = 262.3, range = 0.2–1450.9m). Chicks did not appear to move in response to the environmental factors we examined. The rate of brood movement suggests regular daylight monitoring is necessary to adequately protect unfledged broods from anthropogenic disturbance under current management methods. We found that 569 Piping Plovers (95% CI: 502–651), nearly 15% of the estimated Atlantic Coast population, stopped at a single area in Cape Hatteras National Seashore, North Carolina during fall migration. Birds stayed an average 4–7 weeks, depending on the breeding region from which they migrated, and they primarily used a relatively new protected area. These findings suggest that North Carolina is an important area for Piping Plover ecology during multiple stages of their annual cycle.Master of Science
A federally threatened species, the Piping Plover (Charadrius melodus) lives on sandy beaches along the North American Atlantic Coast. On the coast of North Carolina, Piping Plovers breed in areas with large amounts of recreational and tourism use. To reduce potential negative effects on breeding Piping Plovers from human activities, land managers close areas to pedestrian and vehicle access. However, the plover population there has not appeared to grow as a result of these management strategies, but large numbers of migrant Piping Plovers have capitalized on this management. Recent work that hypothesized population dynamics in North Carolina may function differently than other Piping Plover populations, and this study was designed to test that hypothesis. To understand how disturbance, and attempts to mitigate it, affected plover demography, we studied Piping Plover population dynamics, chick movement, and migration in North Carolina from 2015–2017. We monitored breeding efforts of Piping Plovers and used banding techniques to understand survival of chicks and adults. We observed behavior and movements of Piping Plover chicks before they fledged and gathered information on habitat they selected and potential risks that may alter their behavior. We also conducted migratory surveys after the breeding season at an area thought to be used by large numbers of Piping Plovers. Survival of adult plovers from North Carolina was not substantially different from that of plovers from other areas, but the North Carolina population had low reproductive success caused by low chick survival, and we estimated the population was declining. However, historically this population has not had enough breeding success to maintain itself; therefore, it is likely the population relies on plovers that immigrate to North Carolina from elsewhere. Plover brood movement was variable, and did not move in response to several environmental factors. The rate of brood movements we observed suggest regular daylight monitoring is necessary to adequately protect unfledged broods from anthropogenic disturbance and mortality using current management methods. We found that nearly 15% of Atlantic Coast plovers stopped at a single area in Cape Hatteras National Seashore, North Carolina, during fall migration, staying an average 4–7 weeks. These findings suggest that North Carolina is a unique area to Piping Plover ecology during multiple stages of their annual cycle.
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Haley, Vanessa. "Acoustic Telemetry Studies of Bonefish (Albula vulpes) Movement Around Andros Island, Bahamas: Implications for Species Management." FIU Digital Commons, 2009. http://digitalcommons.fiu.edu/etd/140.
Повний текст джерелаАнотація:
Bonefish (Albula spp.) support an economically important catch-and-release recreational fishery, as well as artisanal harvesting, in The Bahamas. Little is known about the large-scale movement patterns of bonefish, yet such information is essential for proper species conservation and management. I used acoustic telemetry to determine large-scale movement patterns of bonefish around Andros, Bahamas, in conjunction with presumed spawning migrations. I conclude that bonefish travel long distances from shallow flats to pre-spawning aggregation sites in proximity to off-shore reef locations. Off-shore movement to deeper reef locations occurs around both new and full moons. This study has also confirmed anecdotal reports that the North Bight is an important spawning migration corridor for bonefish. This information is critical for the protection of bonefish and identifies important habitats (e.g. migration corridors and pre-spawning aggregations) on Andros that warrant protection from coastal degradation or fishing pressures.
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Killinger, Gregory M. "Movement and survival of chinook salmon fry stocked in a stream with natural barriers to anadromous fish migration." Thesis, Virginia Tech, 1994. http://hdl.handle.net/10919/42100.
Повний текст джерелаАнотація:
This study examined the movement, habitat utilization, growth, and survival of hatchery incubated chinook salmon (Oncorhynchus tshavvytscha) fry stocked above a barrier falls on the Indian River, Chichagof Island, southeast Alaska. The Indian River contained significant potential salmonid rearing habitat, but was devoid of anadromous fish upstream of the barrier falls near tidewater. Approximately 50,000 and 260,000 chinook fry were stocked into Indian River in 1986 and 1988, respectively. The stream was divided into reaches which were stocked with equal numbers of fry. In 1988, fry also were stocked into beaver ponds connected to the stream. Each group of fry contained coded-wire tagged individuals, identified by stocking location.
Fry movement was almost entirely downstream, with a substantial emigration during a spring flood immediately after the 1988 stocking. Most emigrating fry had been stocked in the lower stream section.
Master of Science
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Doherty, Philip David. "Basking shark movement ecology in the north-east Atlantic." Thesis, University of Exeter, 2017. http://hdl.handle.net/10871/27996.
Повний текст джерелаАнотація:
Large marine vertebrate species can exhibit vast movements, both horizontally and vertically, which challenges our ability to observe their behaviours at extended time-scales. There is a growing need to understand the intra- and inter-annual movements of mobile marine species of conservation concern in order to develop effective management strategies. The basking shark (Cetorhinus maximus) is the world's second largest fish species, however, a comprehensive understanding of this species’ ecology, biology and spatial behaviour in the north-east Atlantic is currently lacking. This thesis seeks to investigate the movement ecology of basking sharks using a suite of technologies to integrate biologging, biotelemetry, remotely sensed data, and ecological modelling techniques. I use satellite telemetry data from basking sharks tracked in 2012, 2013 and 2014 to quantify movements in coastal waters off the west coast of Scotland within the Sea of the Hebrides proposed MPA. Sharks exhibited seasonal residency to the proposed MPA, with three long-term tracked basking sharks demonstrating inter-annual site fidelity, returning to the same coastal waters in the year following tag deployment (Chapter 2). I reveal that sharks tracked into winter months exhibit one of three migration strategies spanning nine geo-political zones and the High Seas, demonstrating the need for multi-national cooperation in the management of this species across its range (Chapter 3). I examine the vertical space-use of basking sharks to improve an understanding of the processes that influence movements in all dimensions. Basking sharks exhibit seasonality in depth-use, conduct deep dives to over 1000 m, and alter their depth-use behaviour in order to remain within thermal niche of between 8 and 16 oC (Chapter 4). Finally, I combine contemporaneous data recorded by deployed satellite tags with remotely sensed environmental data to employ novel ecological modelling techniques to predict suitable habitat for basking sharks throughout the Atlantic Ocean (Chapter 5).
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Bredin, Cecilia G. "Studies of cell migration and matrix protease production in human lung cancer cell lines /." Stockholm, 2004. http://diss.kib.ki.se/2004/91-7349-969-2/.
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Edsparr, Karin. "Migration of natural killer cells : matrix interaction, locomotion and regulation of matrix metalloproteinases (MMPs) by IL-2 and chemokines /." Göteborg: Dept. of Oncology, Institute of Clinical Sciences, The Sahlgrenska Academy at University of Gothenburg, 2009. http://hdl.handle.net/2077/20450.
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