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Ng, Yuk-wai, e 吳育煒. "Electronic transitions of transition metal monoborides". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2014. http://hdl.handle.net/10722/195989.
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Nash, Rojas Claudio. "Chilean transition and transitional justice: Critical analysis". Derecho & Sociedad, 2017. http://repositorio.pucp.edu.pe/index/handle/123456789/118498.
Testo completoAbstract (sommario):
This paper aims to review the model of transitional justice applied in Chile as part of a growing critical assessment has been formulating the Inter-American Court of Human Rights in its jurisprudence about the way that the states resolve the issues of truth, justice, reparation of victims and institutional design in processes of democratic transition and democratic consolidation. We will try to show that the conflict is a consequence of the characteristics of gross and systematic violations and political limits imposed transitional processes characteristics. The way this tension is resolved is what sets a model of transitional justice that fulfill or not the international standards on human rights.Este estudio busca revisar el modelo de justicia transicional aplicado en Chile en el marco de una creciente evaluación crítica que ha ido formulando la Corte Interamericana de Derechos Humanos, en su jurisprudencia, contenciosa de la forma en que los Estados resuelven los temas de verdad, justicia, reparación de las víctimas y cambios al diseño institucional en procesos de transición democrática o consolidación democrática. Se intentará demostrar que la tensión se produce a partir de las características propias de las violaciones graves y sistemáticas y los límites políticos que imponen los procesos transicionales. La forma en que se resuelve esta tensión es lo que configura un modelo de justicia transicional acorde o no a los estándares internacionales en materia de derechos humanos.
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Wang, Na, e 王娜. "Electronic transitions of transition metal monoboride and monoxides". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2014. http://hdl.handle.net/10722/208620.
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Skolness, Vanessa. "Success Through Transition: A Transition Planning Checklist for Diabetes Care Transition". Diss., North Dakota State University, 2015. http://hdl.handle.net/10365/24805.
Testo completoAbstract (sommario):
Adolescence is one the most challenging stages for a person with Type 1diabetes. Despite the significant importance of tailoring healthcare services to adolescents? unique needs including their rapid psychosocial growth and development, high quality adolescent healthcare services are not universal in the United States. The current system of health services is ill suited for providing the proper mix of clinical and preventative services to youth. According to the Consensus Statement on Health Care Transition for Young Adults with Special Health Care Needs, ?each year more than half a million children with disabilities and chronic illness transition from adolescence into adulthood?.
In response to the need for transition care the National Diabetes Education Program transition-planning checklist was adapted and implemented for use with youth ages 16-22 years in a primary care clinical practice to provide a more structured process in healthcare transition planning for providers and patients.
The project took place at Sanford Health children?s diabetes department in Fargo, North Dakota from July 2015 through December 2015. The checklist was used by healthcare providers to introduce the concept of transition and topics important to successful transition in the future. After implementation, use of the tool with qualified patients and evaluation of provider feedback about the checklist was used to improve utility of the evidence-based checklist in practice application for future use.
Across six months of implementation, 25% of all eligible youth with Type 1 diabetes seen were presented the transition-planning checklist. The providers agreed the transition-planning checklist incorporated good structure and content. All providers desired to continue to use the checklist in the future to provide transition-planning care to youth with Type 1 diabetes. Providing holistic care for youth with Type 1 diabetes is important for successful transition to adult care services. Implementing a transition ?planning checklist in the children?s diabetes department was found to be helpful and well received despite limited use (25% of eligible patients). Future efforts should be made to extend the project to be more inclusive of all areas needed for successful transition.
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Izumo, Naoki. "Transition". Thesis, University of Iowa, 2016. https://ir.uiowa.edu/etd/2094.
Testo completoAbstract (sommario):
TRANSITION is an installation of films that engages the histories of the bombings of Hiroshima and Nagasaki to the meltdown of Fukushima Daiichi in 2011—it is an attempt to bridge the gap of nuclear issues that are still present today. I redirect found images from their institutional contexts to reposition them as a dialogue between the archival and my own footage. All histories are told through media, and all mediations are remediation of the event. Histories are never fixed, but are constantly reproduced by different groups who are involved. The past and the present must always be interconnected, contesting the importance to understand the fluidity and intersectionality of histories.
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Haupt, Kerstin Anna. "Phase transitions in transition metal dichalcogenides studied by femtosecond electron diffraction". Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/85608.
Testo completoAbstract (sommario):
Thesis (PhD)--Stellenbosch University, 2013.ENGLISH ABSTRACT: Low-dimensional materials are known to undergo phase transitions to differently or- dered states, when cooled to lower temperatures. These phases often show a periodic modulation of the charge density (called a charge density wave – CDW) coupled with a periodic perturbation of the crystal lattice (called a periodic lattice distortion – PLD). Although many experiments have been performed and much has been learnt about CDW phases in low-dimensional materials, the reasons for their existence are still not fully understood yet. Many processes, involving either strong electron–electron or electron–lattice coupling, have been observed which all might play a role in explaining the formation of different phases under different conditions. With the availability of femtosecond lasers it has become possible to study materials under highly nonequilibrium conditions. By suddenly introducing a known amount of energy into the system, the equilibrium state is disturbed and the subsequent relax- ation processes are then observed on timescales of structural and electronic responses. These experiments can deliver valuable information about the complex interactions between the different constituents of condensed matter, which would be inaccessible under equilibrium conditions. We use time resolved electron diffraction to investigate the behaviour of a CDW system perturbed by a short laser pulse. From the observed changes in the diffraction patterns we can directly deduce changes in the lattice structure of our sample. A femtosecond electron diffraction setup was developed at the Laser Research In- stitute in Stellenbosch, South Africa. Short laser pulses produce photo electrons which are accelerated to an energy of 30 keV. Despite space charge broadening effects, elec- tron pulses shorter than 500 fs at sample position can be achieved. Technical details of this system and its characterisation as well as sample preparation techniques and analysis methods are described in detail in this work. Measurements on two members of the quasi-two-dimensional transition metal di- chalcogenides, namely 4Hb-TaSe2 and 1T-TaS2, are shown and discussed. Both show fast (subpicosecond) changes due to the suppression of the PLD and a rapid heating of the lattice. When the induced temperature rise heats the sample above a phase tran- sition temperature, a complete transformation into the new phase was observed. For 4Hb-TaSe2 we found that the recovery to the original state is significantly slower if the PLD was completely suppressed compared to only disturbing it. On 1T-TaS2 we could not only study the suppression of the original phase but also the formation of the higher energetic CDW phase. Long (100 ps) time constants were found for the tran- sition between the two phases. These suggest the presence of an energy barrier which has to be overcome in order to change the CDW phase. Pinning of the CDW by de- fects in the crystal structure result in such an energy barrier and consequently lead to a phase of domain growth which is considerably slower than pure electron or lattice dynamics.
AFRIKAANSE OPSOMMING: Dit is bekend dat lae-dimensionele materie fase oorgange ondergaan na anders ge- ori¨enteerde toestande wanneer afgekoel word tot laer temperature. Hierdie fases toon dikwels ’n periodiese modulasie van die elektron digtheid (genoem ’n “charge density wave” – CDW), tesame met ’n periodiese effek op die kristalrooster (genoem ’n “peri- odic lattice distortion” – PLD). Alhoewel baie eksperimente al uitgevoer is en al baie geleer is oor hierdie CDW fase, is die redes vir hul bestaan nog steeds nie ten volle verstaan nie. Baie prosesse, wat of sterk elektron–elektron of elektron–fonon interaksie toon, is al waargeneem en kan ’n rol speel in die verduideliking van die vorming van die verskillende fases onder verskillende omstandighede. Met die beskikbaarheid van femtosekonde lasers is dit nou moontlik om materie onder hoogs nie-ewewig voorwaardes te bestudeer. Deur skielik ’n bekende hoeveel- heid energie in die stelsel in te voer, word die ewewigstaat versteur en word die daar- opvolgende ontspanning prosesse waargeneem op die tydskaal van atomies struktu- rele en elektroniese bewiging. Hierdie eksperimente kan waardevolle inligting lewer oor die komplekse interaksies tussen die verskillende atomiese komponente van ge- kondenseerde materie, wat ontoeganklik sou wees onder ewewig voorwaardes. Ons gebruik elektrondiffraksie met tyd resolusie van onder ’n pikosekonde om die gedrag van ’n CDW stelsel te ondersoek nadat dit versteur is deur ’n kort laser puls. Van die waargenome veranderinge in die diffraksie patrone kan ons direk aflei watse veranderinge die kristalstruktuur van ons monster ondergaan. ’n Femtosekonde elektronendiffraksie opstelling is ontwikkel by die Lasernavors- ingsinstituut in Stellenbosch, Suid-Afrika. Kort laser pulse produseer foto-elektrone wat dan na ’n energie van 30 keV versnel word. Ten spyte van Coulomb afstoting ef- fekte, kan elektron pulse korter as 500 fs by die monster posisie bereik word. Tegniese besonderhede van hierdie opstelling, tegnieke van die voorbereiding van monsters asook analise metodes word volledig in hierdie tesis beskryf. Metings op twee voorbeelde van kwasi-tweedimensionele semi-metale, naamlik 4Hb-TaSe2 en 1T-TaS2, word gewys en bespreek. Beide wys ’n vinnige (subpikosekon- de) verandering as gevolg van die versteuring van die PLD en ’n vinnige verhitting van die kristalrooster. Wanneer die ge¨ınduseerde temperatuur bo die fase oorgang tempe- ratuur styg, is ’n volledige transformasie na die nuwe fase waargeneem. Vir 4Hb-TaSe2 het ons gevind dat die herstelling na die oorspronklike toestand aansienlik stadiger is as die PLD heeltemal viernietig is in vergelyking met as die PLD net versteur is. Met 1T-TaS2 kon ons nie net alleenlik die vernietiging van die oorspronklike fase sien nie, maar ook die vorming van ’n ho¨er energie CDW fase. Lang (100 ps) tydkonstante is gevind vir die oorgang tussen die twee fases. Hierdie dui op die teenwoordigheid van ’n energie-versperring wat eers oorkom moet word om die CDW fase voledig te ver- ander. Vaspenning van die CDW deur defekte in die kristalstruktuur veroorsaak so’n energie versperring en gevolglik lei dit tot ’n fase van groeiende CDW gebiede wat heelwat stadiger as pure elektron of kritalrooster dinamika is.
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Qasim, Ilyas. "Structural and Electronic Phase Transitions in Mixed Transition Metal Perovskite Oxides". Thesis, The University of Sydney, 2013. http://hdl.handle.net/2123/10029.
Testo completoAbstract (sommario):
The reported multiferroic perovskite series Sr1-xAxTi1/2Mn1/2O3 has been the subject of numerous structural studies, without reaching consensus. In the current work, the cubic Pm3 ̅m is confirmed for end member SrTi1/2Mn1/2O3 in the Sr1-xAxTi1/2Mn1/2O3 ( A= Ca, La; 0 ≤ x ≤ 1) series. The Pm3 ̅m I4/mcm Pbnm structural evolution was observed with increased doping level of Ca. A cubic Pm3 ̅m rhombohedral R3 ̅c transition occurred when La is substituted instead of Ca. Interesting magnetic behaviours were observed and the major contribution to this was concluded to be the mixed Mn4+/Mn3+ ratio. Ru and Ir have almost identical ionic radii and behave similarly in many ways. Remarkably the structure and properties of SrRuO3 and SrIrO3 are different. The current study revealed that the divalent transition metal doped materials of the type SrR1-xMxO3 (R = Ru, Ir, and M = 3d transition metals) are isostructural. This was achieved by the synthesis of a number of new materials of the type SrIr1-xMxO3. Therefore, these two series are comparatively described in the thesis. The structure and physical properties of the iron doped series SrIr1-xFexO3 are found to be different from those of the divalent doped ones, and this was even true for Ru analogues. Therefore, Fe-doped SrRuO3 and SrIrO3, based on the results of the same level doped materials are presented in a separate chapter. In the final chapter, the impact of Cu2+ doping on the structure and electronic properties of LaCrO3 is described. In order to understand structure property relationships, all the materials structurally characterised have had magnetic and resistivity measurements conducted. Special attention is given to realise the correlations between structure, magnetism, and conductivity.
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MacDonald, Anna. "Justice in transition? : transitional justice and its discontents in Uganda". Thesis, King's College London (University of London), 2016. https://kclpure.kcl.ac.uk/portal/en/theses/justice-in-transition(7d46d510-5304-475f-a83c-b33a8463d60d).html.
Testo completoAbstract (sommario):
This thesis explores the construction, implementation and experience of transitional justice at both the state-level in Uganda, and within the Acholi sub-region, the epicenter of the twenty-year war between the Government of Uganda and the Lord’s Resistance Army. It takes 2006 as its starting point, when peace talks began between both sides in Juba, southern Sudan. Conducted against the background of the ICC’s first ever arrest warrants for leading members of the LRA, these talks provided the empirical context for the major theoretical debates that dominated the nascent field of transitional justice. These included normative disagreements about the relationship between peace and justice and the relative merits of international versus indigenous approaches to justice. At Juba, an Agreement on Accountability and Reconciliation was signed and purported to address and resolve these dilemmas. To date however, we know remarkably little about the political and socio-legal dynamics and trajectory of transitional justice in Uganda since Juba. This thesis aims to bridge that gap, providing an in-depth, empirical study based on extensive fieldwork involving 106 semi-structured interviews, 25 focus group discussions and participant observation. Two major dissonances are identified in the promotion, practice and experience of transitional justice in Uganda since 2006. The first highlights the dilemmas surrounding contemporary donor approaches to transitional justice in the absence of a substantive domestic political transition. The interaction of a technocratic and apolitical donor approach with a reactive, procrastinatory and occasionally opportunistic GoU approach, created a stasis which prevented the emergence of a transitional justice policy for Uganda. The second area of dissonance identified was between the ‘local’ as imagined in transitional justice narratives and the local as lived experience in post-conflict Acholiland. Rhetoric around particular ‘Acholi’ approaches to transitional justice, focusing on values of forgiveness and reconciliation, has obscured both the complexity of post-conflict local justice practices and the extent to which these processes and their outcomes were highly contingent on the wider, post-conflict socio-economic context, including poverty, physical and spiritual insecurity, and other quotidian strains. Finally, in its treatment of the northern Ugandan case, this thesis contributes to broader theoretical debates about how transitional justice is constructed and practiced, particularly in contexts where there has been no substantial political transition.
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Halliburton, Amy L. "The transition to kindergarten : teachers' use of transition activities and children's kindergarten transition success /". free to MU campus, to others for purchase, 2004. http://wwwlib.umi.com/cr/mo/fullcit?p3137705.
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Jiang, Zhongyu. "Transition Space". Thesis, KTH, Arkitektur, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-223409.
Testo completoAbstract (sommario):
The project is the expansion of the Stockholm public library. Engaging in study from the misconstrued translations of images, a "transition space" next to the old library. There are four aspects of interpretation for the word "transition" in my project: path, shape, type and memory. During the year in studio 5, imagine reality, I delves into the issue of integrate forms through the misinterpretation of images. The spaces were created by making use of technologies to transform 2d images to 3d volumes, and were developed to respond to site context and the program requirements, primarily through a series of strategic Boolean operations. It is irrational and accidental, but provides more possibilities for architecture design.
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Arrachid, Abdessamad. "The phase transition analyzer : a tool to measure thermal transitions of biopolymers?" Thesis, University of Nottingham, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.435986.
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Eaglesham, D. J. "Charge density waves and their phase transitions in the transition metal chalcogenides". Thesis, University of Bristol, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.375017.
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Noble, Fiona. "Post-transition transitions : childhood, performance and immigration in post-Franco Spanish cinema". Thesis, University of Aberdeen, 2015. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=227226.
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MORADI, Afsaneh. "Transitions Towards Low Carbon Urban Mobility How Italian Municipalities Affect Transition Pathway". Doctoral thesis, Università degli studi di Ferrara, 2016. http://hdl.handle.net/11392/2403301.
Testo completoAbstract (sommario):
Negli ultimi decenni, la tematica del cambiamento climatico ha assunto progressiva rilevanza, anche a causa dei trend crescenti nelle emissioni di GHG e CO2. Nella società internazionale e più specificatamente in Europa la sfida per la riduzione del livello di emissioni è tuttora di grande enfasi. Il settore dei trasporti rappresenta uno dei maggiori responsabili del rilascio di questi gas in atmosfera e attualmente, è ben lontano dal raggiungimento dei target di riduzione delle emissioni, soprattutto per quanto riguarda la situazione inerente le aree urbane. In questa dissertazione si affronterà il tema della mobilità urbana per capire quali strategie possono essere attuate per renderla sostenibile, quali fattori influenzano il raggiungimento degli obiettivi di riduzione delle emissioni e come i governi locali possono agire su questi fattori. Questo studio esplorando il ruolo dei Comuni Italiani nella gestione della mobilità urbana sostenibile, vuole indagare come la transizione dai sistemi di mobilità corrente a sistemi low Carbon è influenzata dalla visione e dal commitment dei policy makers rispetto al tema della sostenibilità. Inoltre, si prefigge di discutere come la transizione può essere gestita attraverso il superamento degli ostacoli esistenti attraverso la pianificazione di strategie per la sostenibilità, la presenza di fondi di finanziamento ad hoc, l’adozione di progetti ed innovazioni relative alla mobilità sostenibile, e come può essere influenzata dal supporto e collaborazione degli stakeholder interessati dal sistema. La dissertazione conclude con la presentazione di un nuovo framework concettuale che possa contribuire a spiegare il fenomeno investigato: le “cinque variabili” identificate attraverso lo studio e presentate nel framework (le attitudini dei governi locali, le strategie, la cooperazione degli stakeholder, il finanziamento e le sfide) influenzano infatti il raggiungimento degli obiettivi di riduzione delle emissioni. Questo framework permette di spiegare gli sforzi dei Comuni nella transizione verso la mobilità urbana sostenibile. I risultati mostrano che i Comuni italiani ritengono le strategie e la pianificazione quali unici mezzi che possono avere effetto diretto sulla riduzione delle emissioni, e che l’attuazione di queste strategie siano influenzate dal supporto finanziario da parte delle autorità e dalla cooperazione con gli stakeholder che a sua volta dipende scarsamente dalla visione dei policy maker circa la sostenibilità. Lo studio ha anche rivelato che i Comuni che presentavano piani di lungo termine erano in grado di ottenere migliori performance rispetto agli altri, considerando il triangolo strategia, finanziamento e cooperazione.In recent decades, there has been growing concerns about climate change challenge which is the resulted from the increasing trends of GHG and CO2 emissions. There is a great emphasize in international society and specifically in Europe to reduce the level of emissions in different sectors. Transport sector is one of the main contributors of these gases that yet could not achieve the predicted targets of emission reductions, specifically in urban areas. low carbon urban mobility is chosen as the theme of this dissertation to find out how the urban mobility system could be managed, to be more sustainable; what factors affect emission reduction objectives of urban mobility and how local government can influence, manage or control these factors. This study focused on the role of municipalities in sustainable urban mobility, the ways in which the transition from current mobility systems to low carbon sustainable systems are influenced by the viewpoints and commitments of policy makers to sustainability issue, how the transition process is managed by overcoming the existing obstacles through development of strategies and plans for improving current mobility system, financing and supporting projects and innovations related to clean mobility, and how other stakeholders participate and cooperate in such processes. The dissertation, concludes by presenting a new conceptual framework that aims to inform such processes at local level, “five variables” mentioned above (attitudes, strategies, cooperations, finance and challenges) influence the success of emission reduction objectives. This framework used to evaluate the efforts of local government (municipalities) in transition towards low carbon mobility, the results showed that municipalities in Italy believe that only strategies and plans have a direct effect on the success of emission reduction objectives, and these plans and strategies are influenced by financial supports of higher authorities and cooperation with other stakeholder groups which is slightly affected by the viewpoints of policy makers. The research also revealed that municipalities who had long term strategic plan have better performance than other municipalities in the triangle of strategy, finance and cooperation.
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Ludwig, Thomas John. "In Transition: Creating Early Successional Avian Habitat in Transitional Urban Spaces". The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1397740935.
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Cacija, Goran. "Qualitative study of the career transition from junior to senior sport in Swedish basketball". Thesis, Halmstad University, School of Social and Health Sciences (HOS), 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-1818.
Testo completoAbstract (sommario):
The purpose of the study was to investigate what factors affect the young athletes in the transition from junior to senior sport. The study’s secondary purpose was to find out what the athletes do to cope with the transitions and the final purpose was to revile what indicates the end of the transition to the athletes. The interview guide had three parts with questions about background information, personal experience related to the transition from junior to senior sport and finally the transition’s effect on the athlete’s career, life outside sport and lessons drawn from the experience. The study consisted of nine interviews, with four male and five female athletes. The data was analysed by using sentence categorisation. Quotations were used to underline the results. The results were divided into several categories, namely: demands, resources, barriers, coping, indicators and long-term effects. The results implicate that the participants felt that it was a big step to take that involved changes in demands both in the sport and in the life outside sport. The participants also felt that social demands, demands on the self, school and planning caused the biggest barriers during the transition. The results also imply that the resource most commonly mentioned by the participants were social factors (such as team cohesion) followed by individual factors. The coping strategies mainly involved mental strategies while the long-term effects show effects of evolving mental skills. Finally the indicators most commonly mentioned were objective and involved an increase in responsibility and better statistics. It is discussed in which way the results of this study can be further strengthened by the results of earlier studies and theories.
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Krokidis, Nicole. "Mothers in transition : children with learning disabilities transition to adulthood". Thesis, University of East London, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.532952.
Testo completoAbstract (sommario):
This research project aimed to provide a more elaborate understanding of mothers' views regarding their child with learning disabilities' transition to adulthood. In particular, the researcher focused on how mothers conceptualised "transition", the role that mothers' relationships with services would play, and mothers' experiences of social structures. Individual semistructured interviews were conducted with seven mothers of young people (16-23 years) with learning disabilities; yielding information on their views and experiences of transition. Thematic analysis within a critical realist epistemological framework was utilised as an analytic methodology. Mothers' were found to conceptualise transition as a complex, life long, worrying process informed by previous experiences of transitions. Mothers considered transition to adulthood as marked by a transition to "independence"; however, the meaning of independence varied amongst the sample. Mothers' visions of their children's adult futures included ideas about social relationships, employment and development of sexuality. The transition process was positioned within important peripheral issues including mothers' predominantly negative reports of service provision, with some helpful exceptions and resources available to mothers external to service provision. Mothers' commitment to their children was demonstrated throughout the data, and was often spoken about in terms of "fighting talk" whereby mothers were campaigning for improved service provision. The implications for professionals working with mothers are to improve partnership working with mothers in preparing for transition and improving service provision more generally. A recognition by services of mothers' needs and alternative identities aside from their role as "maternal caregiver" is recommended.
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Fukuoka, Yuki. "Indonesia's "democratic transition" revisited : a clientelist model of political transition". Thesis, University of Bristol, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.544392.
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Fraser, Kelly A. "Crystallographic studies of complexes of transition and post-transition metals". Thesis, University of Newcastle Upon Tyne, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.238817.
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Smith, Saori. "Democratisation in Indonesia : transition to democracy, transition to 'something else'?" Thesis, University of Manchester, 2005. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.531014.
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Thompson, Ian. "Dynamic phase transitions in biased ensembles of particle systems with repulsive interactions". Thesis, University of Bath, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.665407.
Testo completoAbstract (sommario):
We study dynamic phase transitions in the constant-volume and constant- pressure ensembles of two different systems: a one-dimensional system of diffusive hard particles and a three-dimensional glass-former of nearly-hard repulsive particles. The dynamic transitions are observed using ensembles of trajectories biased with respect to their dynamic activity, biasing to greater or lower activities than equilibrium allows us to sample different dynamic phases. We perform finite-size scaling of the transitions with respect to sys- tem size and observation time, and compare them to first-order phase tran- sitions. The two ensembles are not equivalent in the one-dimensional model. We compare our results to analytic predictions for diffusive systems in both the active and inactive phases, there are structural signatures for both dy- namic regimes. The active phases show hyperuniform ordering and the inac- tive regimes show jamming behaviour, local jamming in the constant-volume ensemble is achieved through phase separation. In the three-dimensional sys- tem we observe a dynamic transition to a glassy inactive phase, there is no obvious structural change and the structural relaxation time increases sig- nificantly. We take configurations from the active and inactive phases and subject them to a jamming protocol in order to compare the final density of the jammed packings. Previous work shows that the inactive phase of glass-forming systems have a different distribution of vibrational modes and a higher compressibility, this suggests that the jamming behaviour should differ between the two phases. We show that jammed packings generated from inactive configurations are denser than those generated from active configurations.
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Hjeds, Löfmark Monika. "Essays on transition". Doctoral thesis, Växjö universitet, Ekonomihögskolan, EHV, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-2238.
Testo completoAbstract (sommario):
Transition Economics focuses on the transformation of a socialist economic system to market economy, which is of interest both because of its policy relevance and its importance to economic theory. As transition was one of the most important economic events of the last century, the study of Transition Economy may help us to understand the difficulties, surprises, and obstacles when a society undergoes profound change. Moreover, it may develop our knowledge of the capitalist economic system and its institutions. The dissertation consists of two different topics within Transition Economics. The first three papers, based on three different data sets, focus on various aspects of the Russian labour market. Theses papers include analyses about the ways people search for work, how unemployment duration is affected by different characteristics, but also how people divide the time outside the paid labour market. This may provide new insights on the Russian labour market, and hopefully also deepen our understanding of labour markets in general. The fourth paper, based on a fourth data set, takes a macro perspective and is concerned with transition and terrorism. It has been claimed that with new democracies, an increased risk of terrorism follows. Therefore, in the final paper, the potential connection between terrorism and transitional progress is analysed.
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Lashkari, Nima. "Hagedorn transition cosmology". Thesis, McGill University, 2009. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=32511.
Testo completoAbstract (sommario):
The substantial recent advances in early universe observational cosmology have confronted theoretical physics with a number of deep conceptual questions. The standard model of particle physics and its natural extensions have proven to be insufficient for explaining the recent observations. String theory as the main candidate for a complete theory of quantum gravity provides us with the possibility of resolving this discrepancy. In this dissertation, I begin by an overview of thermodynamics in string theory. The issue of stability and the existence of the thermodynamic limit have been addressed. I will describe the string gas cosmology in detail, as the leading candidate of early universe cosmology. Successes and shortcomings of the most recent model of string gas cosmology in matching with observations are addressed. I conclude with comments on interesting directions for future study and a possible link with black hole physics.A la lumiere des plus recentes observations cosmologiques, la physique theorique se trouve confrontee a de nombreuses questions conceptuelles. Le Modele Standard de physique des particules et ses plus simples extensions se sont averes insuffisants pour expliquer les recentes observations. La theorie des cordes, qui est presentement la principale candidate pour une theorie complete de la gravite quantique, nous offre la possibilite de resoudre ces lacunes du Modele Standard. Nous debutons cette these par un apercu de la thermodynamique dans la theorie des cordes. Nous nous penchons en particulier sur la stabilite et sur l'existence d'une limite thermodynamique en theorie des cordes. Nous presentons par la suite les details de la cosmologie des gaz de cordes et discutons des succes et des problèmes de cette approche pour decrire l'evolution cosmologique du debut de l'univers. Nous concluons en commentant sur les possibles travaux futurs et sur un lien entre ce sujet et la physique des trous noirs.
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Toomey, Estelle J. "Expatriates in transition". Thesis, University of Oxford, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.540226.
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Holt, Ian G. S. "Role transition theory". Thesis, Anglia Ruskin University, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.433822.
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Redford, John Attwood. "Separated flow transition". Thesis, University of Liverpool, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.415650.
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Adam, Júlio Cézar. "Preaching in transition". Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-197503.
Testo completoAbstract (sommario):
The purpose of this article is to reflect on homiletics and Christian preaching in the context of Latin America, in the current times of transition. In order to provide a better understanding of the approach, initially aspects of the Latin American religious and cultural context will be analyzed. Then there will be considerations on aspects of the
development of Christian preaching, creating a space to think about the relationship between Christian preaching and theologies that are relevant to the context, such as liberation theology. Finally a few challenges to Christian preaching in times of transition will be pointed out. Due to the delimitation of the article, it will focus on the homiletic development of the historical Protestant churches on the continent, above all in the Brazilian context.
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Dato, Prudence. "La transition énergétique". Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAA025/document.
Testo completoAbstract (sommario):
La transition vers les énergies renouvelables implique deux types de préoccupations environnementales. Les combustibles fossiles sont épuisables et leur utilisation génère des externalités négatives à travers des dommages environnementaux irréversibles. En outre, il existe des possibilités de synergies entre les mesures d'efficacité énergétique et l’adoption de l'énergie renouvelable dans la mesure où les premières réduisent la demande d'énergie de sorte que la dernière puisse commencer à réduire les émissions futures de gaz à effet de serre. L'objectif principal de cette thèse est d'analyser la transition énergétique optimale dans un contexte de survenance certaine et incertaine d'une catastrophe environnementale et de déterminer les instruments incitatifs au niveau des ménages en vue de stimuler la transition énergétique.La thèse est composée de quatre chapitres qui traitent indépendamment des différentes questions de la transition énergétique. Le premier chapitre met l'accent sur la transition énergétique optimale impliquant des décisions à la fois sur l'adoption de l'énergie renouvelable et de l'investissement dans les technologies d'économie d'énergie, quand il y a un seuil de pollution certain qui déclenche une catastrophe environnementale. Le deuxième chapitre étudie la transition optimale vers les énergies renouvelables quand la survenance de la catastrophe environnementale est incertaine. Le troisième chapitre cherche à comprendre le comportement des ménages par rapport à leurs décisions d'adopter simultanément les énergies renouvelables et à investir dans l'efficacité énergétique. Finalement, le quatrième chapitre examine le rôle des réseaux intelligents dans l'intégration de l'énergie renouvelable intermittente afin de faciliter la transition énergétiqueThe transition to renewable energy involves two kinds of environmental concerns. First, fossil fuels are exhaustible and second, their use generates negative externalities through irreversible environmental damage. Furthermore, there are possible synergies between energy efficiency measures and renewable energy adoption in the sense that the former reduces the energy demand so that the latter can begin to cut future greenhouse gases emissions. The main objective of this dissertation is to analyze the optimal energy transition under certain and uncertain occurrence of environmental catastrophe and to determine incentive-based instruments at the household level in order to boost the energy transition. The dissertation consists of four chapters that independently present and discuss different issues of energy transition. The first chapter focuses on the optimal energy transition involving decisions about both renewable energy adoption and investment in energy saving technologies, when there is a certain pollution threshold that triggers the occurrence of environmental catastrophe. The second chapter investigates the optimal transition to renewable energy under uncertain occurrence of environmental catastrophe. The third chapter is devoted to understanding household behavior regarding energy transition. The fourth chapter explores the role of smart-grids in integrating intermittent renewable energy to facilitate the energy transition
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Ergin, Fahrettin Gökhan. "Roughness Induced Transition". Case Western Reserve University School of Graduate Studies / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=case1121435967.
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Goumeziane, Smaïl. "L'Algérie en transition". Paris 9, 1993. https://portail.bu.dauphine.fr/fileviewer/index.php?doc=1993PA090030.
Testo completoAbstract (sommario):
Le but de cette thèse est d'étudier l'évolution de l'économie algérienne depuis l'indépendance. Elle comprend une introduction qui explique le concept de transition. La première partie est consacrée à l'analyse de la transition post-coloniale. Elle y identifie un système économique rentier et sa crise. La deuxième partie est consacrée à l'étude de la nouvelle transition engagée depuis 6 ans. Elle identifie ses contraintes et ses limitesThe aim of this thesis is the study of the evolution of Algerian economy since independance. The introduction explains the concept of transition. The first part exposes the analyse of the post-colonial transition, and identify it as a rentier economic system in crisis. The second part is concerned by the study of the new transition engaged six years ago, its constraints and limits
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Hjeds, Löfmark Monika. "Essays on transition /". Växjö : Växjö University Press, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-2238.
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Wood, David L., e R. Nathawad. "Health Care Transition". Digital Commons @ East Tennessee State University, 2014. https://dc.etsu.edu/etsu-works/5155.
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Elizondo, Costa Ricardo. "Lost In Transition: A Patient-Provider Service Framework to Improve Transitional Care". University of Cincinnati / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1368024571.
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Treves, Viviane. "Comment renforcer la gestion par l'État des transitions agroécologiques ? Analyse et reconception des plans français de réduction des pesticides (2007-2023)". Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASB002.
Testo completoAbstract (sommario):
La thèse vise à produire des connaissances et des pistes d'actions pour améliorer la gestion par l'État des transitions agroécologiques. Pour cela nous analysons le cas des politiques publiques de réduction des pesticides en France : les plans Ecophyto. Lancés en 2008, ces plans visaient une réduction d'usage de 50% en 2018, échéance ensuite reculée à 2025. Cependant, depuis, la vente de produits phytosanitaires n'a pas diminué en France, soulevant des questions sur les manières de repenser les politiques publiques pour agir plus efficacement sur l'usage des pesticides. Pour y répondre, cette thèse s'ancre dans la théorie des transitions des systèmes sociotechniques, qui souligne que la réduction de l'usage des pesticides chimiques est freinée par des phénomènes de verrouillage. Pour dépasser le verrouillage, la littérature montre l'importance d'impulser des dynamiques d'action collective inter- organisationnelle, multi-niveaux et coordonnées. Nous nous sommes donc demandée comment renforcer la gestion par l'État de l'action collective pour la réduction de l'usage des pesticides. Nous avons structuré l'analyse en trois parties. Nous avons tout d'abord analysé les processus d'élaboration collective des plans Ecophyto au niveau national et ainsi identifié plusieurs compétences et ressources manquantes à l'administration d'État pour améliorer ces processus. Puis, nous avons étudié la mise en oeuvre de trois instruments visant à soutenir l'émergence d'une gestion collective de la réduction des pesticides et proposé plusieurs pistes pour les renforcer. Sur la base de ces résultats, nous avons cherché à repenser les politiques publiques de réduction des pesticides en mobilisant une démarche de conception innovante. Nous avons alors co-conçu, à travers des ateliers multi- acteurs, trois scénarios de transformation des politiques publiques pour la réduction des pesticides. Cela nous a permis de montrer la pertinence d'une démarche de conception innovante pour traiter de tels sujets. Pour finir, nous discutons du besoin d'un changement organisationnel de grande ampleur, à la fois au sein de l'administration et au sein des organisations agri- alimentaires, pour renforcer la gestion par l'État de la réduction des pesticidesThe aim of this PhD is to generate knowledge and proposals for action to improve the State's management of agroecological transitions. To this end, we analyze the case of pesticide reduction policies in France : the Ecophyto plans. Launched in 2008, they aimed to reduce pesticide use by 50% by 2018, a target later extended to 2025. However, since their implementation, pesticide sales have not decreased in France, raising questions on how to rethink public policies to more efficiently reduce pesticide use. To answer to this question, we use the theory of sociotechnical system transitions, which highlights that reducing the use of chemical pesticides is hindered by lock-in mechanisms. To overcome this lock-in, the literature highlights the need to foster inter-organizational, multi-level and coordinated collective action dynamics. Therefore, we asked ourselves how to strengthen the State's management of collective action for pesticide reduction.Our analysis is structured in three parts. First, we examined Ecophyto policy processes at the national level, and identified several skills and resources lacking within the State administration to improve those processes. We then studied the implementation of three policy instruments designed to support the emergence of collective management of pesticide reduction, and proposed several ways to improve them. Based on these results, we sought to rethink public policies for pesticide reduction, using an innovative design approach. Through multi-stakeholder workshops, we co-designed three scenarios for transforming public policies to reduce pesticides, demonstrating the relevance of an innovative design approach for transition policy processes. Finally, we discuss the need for large-scale organizational change, both within the administration and agri-food organizations, to strengthen the State's management of pesticide reduction
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Downey-McCarthy, Rosemarie. "Postsecondary Educational Transitions for At-Risk Youth: Exploration of the College Transition Support Program". Thesis, University of Oregon, 2013. http://hdl.handle.net/1794/13404.
Testo completoAbstract (sommario):
Working within a Social Cognitive Career Theory framework, the study explored outcomes associated with participation in a dual-enrollment (high school and community college) College Transition Support Program (CTSP). The study used three data points over a nine month period to explore whether participation in the CTSP was associated with changes in college self-efficacy, education-related future aspirations and goals, perceived barriers, perceived support, locus of control, depression, anxiety, academic achievement-related expectations, academic achievement-related fears, and academic achievement-related expectation-fear balance, as well as college persistence and cumulative college GPA.
Repeated measure responses of a group of 34 CTSP students were contrasted with a group of 34 students in a non-equivalent comparison group. Baseline data for a group of 207 non-CTSP alternative high school students were also used to test for selection bias for both of the longitudinal groups.
Doubly multivariate repeated measures analysis of variance (DMRM-ANOVA) procedures were conducted. Multivariate results suggested that participation in the CTSP was associated with positive, statistically significant growth in the weighted linear combination of outcome variables.
Repeated measures univariate analyses were also conducted to provide more detail. CTSP participation was associated with growth over time on several positive student outcomes, including college self-efficacy, education-related future aspirations and goals, academic achievement-related expectation-fear balance, academic locus of control, and college persistence/retention. In addition, CTSP students earned significantly higher cumulative college GPAs over their first year at the community college.
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Ackerfors, Linnea, e Amanda Hederén. "Climate Transition in Municipalities : Identifying ways to assess transition processes through indicators". Thesis, Linköpings universitet, Tema Miljöförändring, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-128107.
Testo completoAbstract (sommario):
Climate change has been recognised as one of the biggest challenges of our time. To prevent further climate change impacts, nations at COP21 further stressed the need to mitigate their greenhouse gas emissions enough to prevent dangerous temperature rise and to adapt societies to become more resilient. Municipals have been found important actors in this transition due to their power to inflict change on a local level. However, there is a lack of methods to assess how transition is made due to the fact that transition is a fairly new approach to managing climate change combined with a lack of completed transitions in municipalities. The purpose of this study is to explore the use of indicators as a method to assess municipal transition processes. Focusing on two Swedish municipalities that have been deemed vulnerable but at the same time apt to combat climate change, this study uses a triangulation of methods that are divided into two phases. The first phase uses a literature review in order to create a scientifically based list of transition indicators. The second phase uses document analyses and interviews in order to test the indicators and analyse transition process on a local level. The study revealed that there are multiple barriers and triggers for transition such as conflicting interests, economic factors, political steering, knowledge building- and awareness and long term perspectives, but that there also exist important tools for municipal transition in the form of networks through multi-level collaborations and plans/objectives. The findings in this study also suggests that the use of indicators as a method to assess transition could be viable, but that it is limited due to its contextual nature and lack of successful transitions to compare with.Klimatförändringar har ansetts vara en av de viktigaste utmaningarna i vår tid. För att förhindra att vidare skador av klimatförändringarna kom nationer som deltog i COP21 överens om att minska sina växthusgaser tillräckligt mycket för att förhindra farliga temperaturförhöjningar och att anpassa sina samhällen till resilienta enheter. Kommuner anses vara viktiga aktörer i denna omställning då de har makt att påverka förändringar på en lokal nivå. Dock saknas metoder för att bedöma hur omställning utförs då omställning är ett nytt angreppssätt kombinerat med en brist på genomförda omställningar. Syftet med denna uppsats är att utforska användningen av indikatorer som metod för att bedöma omställningsprocesser. Genom att använda en triangulering av metoder som delats upp i två faser fokuserar studien på två svenska kommuner som har fastställts som känsliga inför klimatförändringarna men även att ha förmågan att hantera dem. Den första fasen består av en litteraturstudie som skapade en vetenskaplig grund som berörde en global och nationell nivå. Den andra fasen bestod av en dokumentsanalys och intervjuer för att utforska omställningsprocesser på en lokal nivå. Studien visar på att det finns flera barriärer och drivkrafter för omställning som konkurrerande intressen, ekonomiska faktorer, politisk styrning, kunskaps byggande- och medvetenhet och långsiktighet men även att det fanns verktyg som var viktiga för kommunal omställning som nätverk genom samarbeten på olika nivåer och planer/mål. Slutligen visar även studien på att användningen av indikatorer som metod för att bedömma omställning skulle kunna vara möjligt men att begränsningar finns då metoden dels är kontextberoende men även att det är svårt att göra jämförelser då ingen fullförd omställning har skett.
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Qiao, Bin. "Epithelial-Mesenchymal Transition and Mesenchymal-Epithelial Transition in Oral Stem Cell Carcinogenesis". Thesis, Griffith University, 2011. http://hdl.handle.net/10072/367467.
Testo completoAbstract (sommario):
Oral squamous cell carcinoma (OSCC), derived from normal oral epithelium transformation, remains a major public health problem world-wide. The prognosis of OSCCs that occur on lips is good, while other sites of oral mucosa where OSCC appears are more progressive, invasive and metastatic. A small subset of cells within a malignant neoplasm, named cancer stem cells (CSCs) or tumour initiating cells are thought to be capable of initiating the neoplasm itself, and of driving its growth and recurrance after treatment. The precise origin of CSCs is an ambiguous issue at present. The first proposal of the origin of CSCs is that CSCs develop from tumour cells themselves via cellular dedifferentiation. The secondary hypothesis for the origin of CSCs proposes that CSCs are the product of malignant transformation of adult stem cells. In this Ph.D thesis, we tried to demonstrate that CSCs in OSCC may be produced from those pathways.Thesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Medicine
Griffith Health
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Vale, J. G. "The nature of the metal-insulator transition in 5d transition metal oxides". Thesis, University College London (University of London), 2017. http://discovery.ucl.ac.uk/1538695/.
Testo completoAbstract (sommario):
A number of 5d transition metal oxides (TMOs) either undergo, or lie proximate to, a metal-insulator transition (MIT). However these MITs frequently depart from a Mott-Hubbard picture, in which the interactions are dominated by the interplay between the on-site Coulomb repulsion and electronic bandwidth. In 5d TMOs the sizeable intrinsic spin-orbit coupling plays an important role, and gives rise to electronic and magnetic ground states -- at both sides of the MIT -- that cannot be adequately described within a purely L-S coupling scenario. In this thesis the aim is to understand the role of spin-orbit coupling in determining the electronic and magnetic properties of 5d TMOs. There has been a large amount of recent interest within this field (both experimentally and theoretically), however thus far has mostly been limited to the 5d5, j =1/2 limit. The perovskite iridates Sr2IrO4 and Sr3Ir2O7 lie within this limit. Theoretical predictions suggest a significant easy-plane anisotropy is present for the single layer Sr2IrO4. I show that this anisotropy can be observed and quantified, using magnetic critical scattering and previously published resonant inelastic X-ray scattering (RIXS) data. This differs from previous results that suggest purely 2D Heisenberg behaviour. Meanwhile the critical fluctuations in bilayer Sr3Ir2O7 have a three-dimensional nature, which can be directly related to the intra-bilayer coupling and significant anisotropy previously probed by RIXS. I also demonstrate that resonant X-ray scattering techniques can be successfully applied to other 5d systems, especially the d3 osmates. Both NaOsO3 and Cd2Os2O7 undergo MITs directly linked to the onset of antiferromagnetic order (Slater or Lifshitz mechanisms). The first ever high-resolution RIXS measurements at the Os L3 absorption edge reveal that there is a correlated evolution of the electronic and magnetic excitations through the respective MITs. The behaviour is consistent with a scenario in which the effect of spin-orbit coupling and electron correlations are reduced with respect to the iridates, yet still manifests through a strong spin wave anisotropy. Finally I show that the study of 5d TMOs can be extended into the time domain. Through the development of new instrumentation, the transient dynamics of photo-doped Sr2IrO4 were probed by time-resolved resonant (in)elastic X-ray scattering. The relevant time scales can be directly compared to the interaction strengths and anisotropies in the undoped state. Moreover, there seems to be an effective mapping of the transient behaviour in the photo-doped state to an equivalent level of bulk electron doping in (Sr_{1-x}La_x)2IrO4.
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Suleiman, Lina. "Water Governance in Transition". Doctoral thesis, KTH, Samhällsplanering och miljö, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-12982.
Testo completoAbstract (sommario):
The constraints experienced by water utilities in developing countries, with regard to the universal provision of access to water and improved water services, have been defined by international policymakers as "a crisis of governance". This study departs from the theoretical perspectives on governance and aspires to accumulate knowledge and advance understanding on how the performance of water utilities can be enhanced. The thesis comprises five papers and the cover essay. Four of the papers address case studies and one is a theoretically based paper, while all five papers are supported by reviews from the literature relevant to the topic of each paper. The thesis uses insights from literature reviews mapping relevant scientific theories and concepts in the areas of mainly governance, deliberative policymaking and communicative planning, social capital, civil society and institutional theoretical perspectives. The study integrates different research methods and explores theoretical perspectives on governance to examine the governance aspects of water utilities in the transition phase from public to private management and operation. The study investigates whether the governance structure that involves the private sector in the form of Public Private Partnership (PPP) of water utility has produced "good governance" and enhanced water governance in two cases, the Lema Water Company in Amman, Jordan and the Ghana Water Company Limited (GWCL) in Accra, Ghana. The analysis highlights evidence of governance deficiency. Accordingly, the thesis argues against the policy design that assumes that simply transferring the management and operation of water utility to private operators would resolve the problems of water utilities and enhance water governance. The analyses and the conclusions reached in the papers, together with a review of the literature on New Institutional Economics theory that knits together all the theories that are utilised in the papers, offer insights in the understanding of aspects of water governance. The insights suggest that policymakers need to better understand how institutions at different levels impact the overall performance of a water utility. The performance of the water utility cannot be detached from the wider institutional setting or reduced to simply changing the operator. What has been disregarded from the calculus of international policymakers, the thesis mainly argues, is the institutional perspective. The study concludes that actors’ performances are affected primarily by their institutional settings. The constraints of water utilities to provide a better performance and good governance processes reside in different kinds of institutional settings To address this, the thesis develops a generic institutional framework within which water governance aspects can be assessed at different institutional levels, from the higher level of politics to that of the individual level. According to this perspective, the study views governance process as "the interaction between actors from the spheres of a society within specific sets of formal and informal institutions in a social setting that produces certain political, economic and social outcomes". It defines good governance as "the legitimacy given by the wider public to institutions in a social setting and the coherency of formal and informal institutions to produce socially effective outcomes for the collective public". The developed generic institutional framework is used to more thoroughly analyse the two cases integrated in the study. This approach to assessment of water governance provides an explanation for why the water utilities were not able to meet their performance goals and enriches our understanding of water governance processes. It also modestly maps the main problematic institutional areas that in each case constrained aspects of good water governance. In practical terms, this thesis emphasises that policymakers have to map and identify the institutional factors constraining the overall performance of a water utility, at all levels. The thesis also urges policymakers to be cautious regarding which formulated policies are seen as solutions. Policymakers should restrain themselves from experimenting with policy when they are not sure that certain outcomes are likely to be produced by adopting a particular policy. In the long run, inappropriate policies may negatively affect local institutional settings and are likely to undermine the capacity of local governance.QC20100628
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Barron, Andrew Ross. "Transition metal aluminohydride complexes". Thesis, Imperial College London, 1986. http://hdl.handle.net/10044/1/37935.
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Cordes, David B., e n/a. "Supramolecular transition metal architectures". University of Otago. Chemistry Department, 2005. http://adt.otago.ac.nz./public/adt-NZDU20060705.144929.
Testo completoAbstract (sommario):
This thesis describes the investigation of the coordination and supramolecular chemistry of three different types of pyridine-containing ligand with a selection of Ag(I), Cu(I), Cu(II) and Cd(II) salts. The ligand types are flexible and four-armed, rigid and four-armed and bent with two rigid arms. All the ligands also display the ability to form additional supramolecular interactions.
Chapter one introduces supramolecular chemistry and crystal engineering and covers background on several areas of current interest in these fields. Network structures, both coordination polymers and hydrogen-bonded systems, are discussed and topological analysis as a method of describing and comparing network structures is introduced. An outline of the ligand design, choice of transition metals and anions is given.
Chapter two provides a review of flexible four-armed pyridine-containing ligands and their use in coordination chemistry. The synthesis and characterisation of three flexible four-armed ligands 1,2,4,5-tetrakis(2-pyridylmethyl-sulfanylmethyl)benzene (2tet), 1,2,4,5-tetrakis(3-pyridylmethyl-sulfanylmethyl)benzene (3tet) and 1,2,4,5-tetrakis(4-pyridylmethyl-sulfanylmethyl)benzene (4tet) are given. The synthesis and characterisation of the Ag(I), Cu(II) and Cd(II) complexes formed with these three ligands are also given. The complex of [Cd(2tet)(NO₃)₄] was structurally characterised by X-ray diffraction and was found to be a discrete species. The complexes {[Ag₂(3tet)](ClO₄)₂}n̲, {[Ag₂(3tet)](PF₆)₂}n̲, {[Ag₂(3tet)](CF₃CO₂)₂}n̲, {[Ag₂(4tet)]-(ClO₄)₂�2MeCN�2CHCl₃}n̲, {[Ag₂(4tet)](PF₆)₂�6MeCN}n̲ and {[Ag₂(4tet)](ClO₄)₂-�3H₂O}n̲ were likewise structurally characterised by X-ray diffraction. All these complexes were three-dimensional coordination polymers. A comparison of the seven structures is given at the end of the chapter.
Chapter three reviews rigid four-armed pyridine-containing ligands and their use in coordination chemistry. The preparation of the rigid four-armed ligand 2,3,4,5-tetrakis(4-pyridyl)thiophene (pyth) is given. The synthesis and characterisation of the Ag(I), Cu(I) and Cd(II) complexes formed with this ligand are also given. The complexes [Ag(pyth)](BF₄)�3MeCN�CH₂Cl₂}n̲, [Ag(pyth)](PF₆)�MeCN�CH₂Cl₂}n̲, [Ag(pyth)]-(CF₃SO₃)�2MeCN�CH₂Cl₂}n̲, [Cu(pyth)](PF₆)�MeCN�CH₂Cl₂}n̲ and [(Cu₂I₂)(pyth)]-(BF₄)�1/2CH₂Cl₂�H₂O}n̲ were structurally characterised by X-ray diffraction. The complex with CuI was a two-dimensional coordination polymer, and the other four complexes were three-dimensional coordination polymers. A comparison of the five structures is given at the end of the chapter.
Chapter four begins with a review of rigid angular bridging ligands and their use in coordination and supramolecular chemistry. The preparation of the ligand bis(4-pyridyl)amine (bpa) is given. The structural arrangement of bpa in the solid state was determined by X-ray diffraction. Complexes of Ag(I), Cu(I), Cu(II) and Cd(II) formed with this ligand were synthesised and characterised. The complexes {[Ag(bpa)(MeCN)](CF₃SO₃)}n̲, {[Ag(bpa)](PF₆)�MeCN}n̲, {[Ag(bpa)](ClO₄)-�2MeCN}n̲, {[Ag(bpa)](ClO₄)}n̲, {[Ag(bpa)](NO₃)}n̲, [(Cu₂I₂)(bpa)₂]n̲, {[Cu(bpa)₂Cl₂]-�3DMF�3/2H₂O}n̲, {[Cd(bpa)₂(NO₃)(H₂O)](NO₃)}n̲, {[Cd(bpa)₂(SO₄)(H₂O)]�3H₂O}n̲, [Cd(bpaH)₂(SO₄)₂(H₂O)₂]�2MeCN and {[Cd(bpa)(SCN)₂]�1/5iPrOH}n̲ were structurally characterised by X-ray diffraction. All complexes with Ag(I) were one-dimensional coordination polymers, with two of them helical, the other three zigzag. Both complexes with Cu(I) and (II) were two-dimensional coordination polymers. One complex with CdSO₄ was discrete, with the bpa ligands mono-protonated, but all other three other Cd(II) complexes were three-dimensional coordination polymers. Seven of these complexes showed hydrogen-bonding interactions linking them together to form supramolecular structures of higher dimensionalities. A comparison of the twelve structures is given at the end of the chapter.
Chapter five is a brief summary of the outcomes of this thesis.
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Srivastava, Ashim. "Transition : a spatial translation /". Cincinnati, Ohio : University of Cincinnati, 2007. http://www.ohiolink.edu/etd/view.cgi?ucin1184346198.
Testo completoAbstract (sommario):
Thesis (Master of Architecture)--University of Cincinnati, 2007.Advisor: Jay Chatterjee. Title from electronic theses title page (viewed Nov. 21, 2007) Includes abstract. Keywords: transition, movement, speed. Includes bibliographic references.
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Klintberg, Lena. "Miniature phase-transition actuators/". Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributör], 2002. http://publications.uu.se/theses/91-554-5345-7/.
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Bowers, Carla J. "The freshman transition process /". view abstract or download file of text, 2007. http://proquest.umi.com/pqdweb?did=1421620451&sid=1&Fmt=2&clientId=11238&RQT=309&VName=PQD.
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Michie, Charles. "Novel transition metal oxynitrides". Thesis, University of Oxford, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.289404.
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Jasim, Naseralla. "Transition metal bifluoride complexes". Thesis, University of York, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.323538.
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Anderson, Kirsty Mackenzie. "Structural transition metal chemistry". Thesis, University of Bristol, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.251082.
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Martin, Adrian Peter. "Cosmological phase transition phenomena". Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389880.
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Hele, Timothy John Harvey. "Quantum transition-state theory". Thesis, University of Cambridge, 2014. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.708197.
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Pande, Vijay Satyanand. "Freezing transition of heteropolymers". Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/33262.
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