208 research outputs found

    Reentrance Effect in Macroscopic Quantum Tunneling and Nonadiabatic Josephson Dynamics in d-Wave Junctions

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    We develop a theoretical description of nonadiabatic Josephson dynamics in superconducting junctions containing low energy quasiparticles. Within this approach we investigate the effects of midgap states in junctions of unconventional d-wave superconductors. We identify a reentrance effect in the transition between thermal activation and macroscopic quantum tunneling, and connect this phenomenon to the experimental observations in Phys. Rev. Lett. 94, 087003 (2005). It is also shown that nonlinear Josephson dynamics can be defined by resonant interaction with midgap states reminiscent of nonlinear optical phenomena in media of two-level atoms

    Wave propagation in an ion beam plasma system

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    Association Euratom - Risø National Laboratory, Technical University of Denmark - Annual Progress Report 2007

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    Increasing funding for Global Mental Health by drawing lessons from the case of HIV/AIDS

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    Objective: Global Mental Health (GMH) is the field of global health dealing with the spectrum of mental, neurological and substance use disorders (MNS disorders), often with a focus on low- and middle-income countries (LMICs). While MNS disorders constitute a consider-able burden of disease, investments in the field lag behind, creating a severe funding gap. In contrast, the Human Immunodeficiency Virus/Acquired Immunodeficiency Syndrome (HIV/AIDS) epidemic has seen unprecedented commitment, especially in terms of funding. Consequently, this paper examines the research question: “How can the increase in global funding for HIV/AIDS over the past three decades serve as an example to draw lessons for increasing GMH funding in LMICs?”.Methods: Based on the ‘Theory of Lesson-drawing’ by Rose (1991) two programs, the Joint United Nations Programme on HIV/AIDS (UNAIDS) and The Global Fund to Fight AIDS, Tuberculosis and Malaria (the Global Fund), were analyzed, and a conceptual model cre-ated for each program. The conceptual model, in addition to a comprehensive literature review were the base to draw learnings from the fight against the HIV/AIDS epidemic and its funding. Learnings from HIV/AIDS were applied to GMH by giving a prospective evalua-tion of the transferability and desirability of the analyzed programs and their outcomes.Results: A concrete next step that should be taken in order to increase funding and imple-mentation of high-quality mental health care in LMICs includes the establishment of a GMH partnership which represents diverse constituencies and expertise. Among other things, emphasis should be put on promoting strong civil-society and community involvement. Ad-ditionally, a multi-facetted advocacy and awareness campaign to increase traditional donor contributions, innovative financing mechanisms and domestic resources for GMH should be launched.Conclusion: Lessons from the increase in global funding for HIV/AIDS and how it was achieved can be drawn in the areas of funding generation, raising political and social com-mitment and multi-stakeholder collaboration. Yet, the analysis has also shown the potential pitfalls when overall health system strengthening efforts and primary health-care integration are not sufficiently addressed.Acknowledgments: This paper was produced as a final thesis to acquire the academic de-gree BSc International Health Sciences at Fulda University of Applied Sciences. I would like to extend my gratitude to Prof. Dr. Dr. Jens Holst for his support throughout my studies and this thesis supervision, together with Prof. Dr. Kai Michelsen. Moreover, I would like to thank Eric Daniel Sander for his invaluable thoughts and input during the writing process, as well as those who supported me with corrections and proof-reading
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