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No description available.

La pathologie pulmonaire et la pathologie cardiaque interagissent et le bloc “Cœur- poumon” est à considérer comme une seule et même entité en imagerie: la lecture du cœur, des vaisseaux, des poumons et du médiastin doit être globale et intégrée, quelle que soit la modalité d’imagerie. Nous avons pu ainsi illustrer la contribution de la TDM dans l’évaluation de la prévalence de la pathologie coronarienne asymptomatique au cours de la fibrose pulmonaire idiopathique, l’analyse du volume de l’oreillette gauche au cours des BPCO, la corrélation entre volume pulmonaire hypoperfusé et le rapport VD/VG, et l’évaluation de l’envahissement cardiaque au cours des néoplasies pulmonaires. Les avancées techniques en scannographie nous permettent désormais d’approcher outre la morphologie le versant fonctionnel, notamment par l’évaluation de la fonction cardiaque, de la perfusion pulmonaire, en attendant le développement en routine clinique de l’approche par TDM de la fonction de ventilation. Notre thèse avait pour ambition de contribuer modestement à la promotion d’une approche morphologique et fonctionnelle intégrée de l’imagerie du cœur, des vaisseaux thoraciques et du poumon, dont les bénéfices cliniques nous apparaissent quotidiens et dont l’enseignement nous apparait indissociable. / Pulmonary and cardiac pathology interact and the « heart-lung » bloc is to consider as one and same entity in imaging: heart, vessels, lungs and mediastinum analysis must be global and integrated, whatever imaging modality.In this work, we have illustrated computed tomography contribution in: evaluating asymptomatic coronary disease in cystic fibrosis pathology, left atrial volume in COPD patients, correlation of hypo perfused lung volume and RV/LV ratio, and cardiac invasion evaluation in broncho-pulmonary neoplasm.Computed tomography technological advances allow us to evaluate morphology and functional side, in evaluating cardiac function, pulmonary perfusion, waiting for the development of pulmonary ventilation in routine. Our work contributes to the development of a morphological and functional approach in heart, great vessels and lung imaging.

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近年來，金融資產報酬波動的推估一直是重要的研究課題。然而，過去的波動不對稱研究均集中在股票市場，探討外匯市場波動不對稱性的實證研究並不多，但若忽略其不對稱效果將影響未來波動預測的正確性。因此，本研究利用近十六年來美元及日圓兌台幣匯率日資料，以傳統的波動不對稱性指數型GARCH模型(EGARCH Model)、門檻型GARCH模型(TGARCH, GJR GARCH Model)，亦延用異質自我相關迴歸模型(HAR-RV Model)及修正型異質自我相關迴歸模型(Modified HAR-RV Model)分別探討美元及日圓兌台幣匯率波動是否存在不對稱現象及其不對稱程度，並加以分析。實證研究中，上述四種模型均顯示美元及日圓兌台幣匯率波動的確具有不對稱效果；美元兌台幣匯率波動，與股票市場一致，報酬率與波動度間呈負向關係，當台幣相對美元升值時，波動度較高；而日圓兌台幣匯率波動，與美元匯率變動方向相反，報酬率與波動度間呈正向關係，當台幣相對日圓貶值時，波動度較高。此外，以異質自我相關迴歸模型實證分析中，日波動落後項的影響力明顯大於週、月、季波動落後項，與Muller, et al. (1997)、Corsi (2004)及Andersen, et al. (2005)實證研究結果類似。

A new nomad society is colonizing the desert landscape of the American Southwest. It is a leaderless seasonal swarm, dispersed but densely connected socially, able to form and disband agile urban communities the size of large American cities. It consists of highway bound leisure hunters driving extremely wasteful vehicles that while parked are able form a dense and resilient pioneer society. They are predominantly retired and constructing a new American dream, an informal utopia created from potlucks, social media, satellite dishes and mobile homes. This frontier society of urban flexibilization, decentralization and total urbanization is a product of the complexity and uncertainties of cities being amplified by technological and social disruption, climate change and economic crises. In a mobile future, informal and temporary uses will be important drivers of development and the urban periphery a breeding ground for new forms of urbanism. How do we govern, plan for and understand this development? The nomad cities are poorly documented and understood, especially in academia. With this thesis I aim to change that. I have conducted extensive field studies, including both quantitative mapping and semi-structured qualitative interviews. The data has been analyzed using a theoretical framework consisting of network theory of Castells, spatial analysis ideas of Lefebvre, Venturi, Friedman, Deleuze and Guattari, and social theories of Bourdieu, Foucault and Standing among others. The basic building block of the nomad city are recreational vehicles (RVs); trailers, motorhomes and camper vans. The RV is in itself a hybrid phenomenon that embodies conflicting ideals of the American society: total freedom of movement, the reinvention of the self on the frontier and the American dream. It is both individualistic and community based, and it’s urban forms are highly adaptable to societal changes, mirroring society’s development as well as the changing landscape it inhabits. It recreates itself and revises its citizens’ common habitus with every iteration. The RV world contains multiple layers of meaning for our increasingly urbanized society. It is a frontier for the expansion of exurbia and a physical manifestations of the network society. It creates small initiatives that create ripple effects and thereby a transformation of the urban fabric. To encourage these practices the role of planning needs to be revised. It should not primarily be to decide what is built but to enable the emerging practices that are there. Instead of presenting a grand plan we should allow a multitude of bottom up processes to lead development. In the words of Cedric Price: “The primary aim of planning is not to specify an ideal state but to open up to new possibilities”.

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No description available.

No description available.