739 research outputs found

    Updating the descriptive biopsychosocial approach to fit into a formal person-centered dynamic coherence model

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    Based on the Aristotelian dynamis-energeia-differentiation, a concept issuing dynamic coherence providers as the sub-level of individual realizations. This logical sub-level is given for any kind of realizations. Based on this two-level approach, to some degree similar to the two-level approach developed by Polanyi, model of biopsychosocial interaction is established. It is suggested as the theoretical basis for a person-centered approach in healthcare, integrating science and humanitite

    The Decay of Unstable Noncommutative Solitons

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    We study the classical decay of unstable scalar solitons in noncommutative field theory in 2+1 dimensions. This can, but does not have to, be viewed as a toy model for the decay of D-branes in string theory. In the limit that the noncommutativity parameter \theta is infinite, the gradient term is absent, there are no propagating modes and the soliton does not decay at all. If \theta is large, but finite, the rotationally symmetric decay channel can be described as a highly excited nonlinear oscillator weakly coupled to a continuum of linear modes. This system is closely akin to those studied in the context of discrete breathers. We here diagonalize the linear problem and compute the decay rate to first order using a version of Fermi's Golden Rule, leaving a more rigorous treatment for future work.Comment: 36 pages, 7 figures, dedicated to Rudolf Haag. v2: uniform estimate for Weyl criterion provided, refs adde

    Brazil’s “Ciencia sĂȘm Fronteiras” Program and Soft Power

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    Ciencia sĂȘm Fronteiras was one of the largest academic exchange programs in the early 2010s that enabled almost 100.000 Brazilian researchers to undertake their research or entire degrees abroad. As one major element of Dilma Rousseff’s international engagement, the program was often named in the context of Brazil’s soft power. But very little research has been done on how Ciencia sĂȘm Fronteiras contributed to Brazil’s soft power reservoir. This article examines the program from an institutional perspective and analyzes why the program has come short in living up to its soft power potential

    The potential of mixed-method social network analysis for studying interaction between agency and structure in education

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    This article discusses the potential of mixed-method social network analysis (MMSNA) as a methodology for designing and conducting studies that address questions of interplay between human agency and social structures in educational settings. First, we discuss a rationale for using MMSNA referring to the theoretical calls for better understanding the role of agency in network structures. Next, we discuss examples of studies that illustrate how MMSNA has been applied to investigate (a) the role of agency in social network formation and (b) how social networks facilitate actors' agency in educational processes. Finally, we outline a guide for how to use MMSNA and consider its potential for future studies of interactions between agency and structures in educational settings

    Modelling aspects of oviduct fluid formation in vitro

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    © 2017 Society for Reproduction and Fertility. Oviduct fluid is the microenvironment that supports early reproductive processes including fertilisation, embryo cleavage and genome activation. However, the composition and regulation of this critical environment remain rather poorly defined. This study uses an in vitro preparation of the bovine oviduct epithelium to investigate the formation and composition of in vitro-derived oviduct fluid (ivDOF) within a controlled environment. We confirm the presence of oviduct-specific glycoprotein 1 in ivDOF and show that the amino acid and carbohydrate content resembles that of previously reported in vivo data. In parallel, using a different culture system, a panel of oviduct epithelial solute carrier genes and the corresponding flux of amino acids within ivDOF in response to steroid hormones were investigated. We next incorporated fibroblasts directly beneath the epithelium. This dual culture arrangement represents more faithfully the in vivo environment and impacts on ivDOF composition. Lastly, physiological and pathophysiological endocrine states were modelled and their impact on the in vitro oviduct preparation was evaluated. These experiments help clarify the dynamic function of the oviduct in vitro and suggest a number of future research avenues, such as investigating epithelial-fibroblast interactions, probing the molecular aetiologies of subfertility and optimising embryo culture media

    Benchmarking in a rotating annulus: a comparative experimental and numerical study of baroclinic wave dynamics

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    The differentially heated rotating annulus is a widely studied tabletop-size laboratory model of the general mid-latitude atmospheric circulation. The two most relevant factors of cyclogenesis, namely rotation and meridional temperature gradient are quite well captured in this simple arrangement. The radial temperature difference in the cylindrical tank and its rotation rate can be set so that the isothermal surfaces in the bulk tilt, leading to the formation of baroclinic waves. The signatures of these waves at the free water surface have been analyzed via infrared thermography in a wide range of rotation rates (keeping the radial temperature difference constant) and under different initial conditions. In parallel to the laboratory experiments, five groups of the MetStr\"om collaboration have conducted numerical simulations in the same parameter regime using different approaches and solvers, and applying different initial conditions and perturbations. The experimentally and numerically obtained baroclinic wave patterns have been evaluated and compared in terms of their dominant wave modes, spatio-temporal variance properties and drift rates. Thus certain ``benchmarks'' have been created that can later be used as test cases for atmospheric numerical model validation

    Challenges for social media: Misinformation, free speech, civic engagement, and data regulations

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    Social media has arguably brought one of the greatest changes to Internet communication since the invention of the Web but challenges as well. Apart from helping people to have access and to exchange information, social media has also been used to spread misinformation, hate speech, and the user‐generated data is adopted for targeted commercial and political advertising based on personal profiles. Moreover, the most popular applications available are owned by a small number of companies who may have an undue influence on how civic engagement takes place on their platforms. In this panel, four panelists will discuss the following: misinformation and the role of pseudo‐cognitive authorities; hate speech and Germany’s Network Enforcement Act (NetzGD); civic engagement and market capture by social media companies; and finally, personal data processing and the General Data Protection Regulation (GDPR). We intend to raise interesting questions helping to understand these issues, and to find solutions for the beneficial use of information technologies as well as to scope out all its advantages.Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/147854/1/pra214505501076.pd
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