739 research outputs found
Updating the descriptive biopsychosocial approach to fit into a formal person-centered dynamic coherence model
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
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
Brazilâs âCiencia sĂȘm Fronteirasâ Program and Soft Power
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 Rousseffâs international engagement, the program was often named in the context of Brazilâs soft power. But very little research has been done on how Ciencia sĂȘm Fronteiras contributed to Brazilâs 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
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
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Discussing Issues of Information Technology in Country Development
The development of countries with laggard economies is becoming a global concern. The harmful complications of poverty and illiteracy are beginning to show up outside those countries in violent forms. The precautions against this migration of harm are splitting the world apart at the same time as technology may become able to bring it together. Over the last few years, information technology (IT) has grown very fast and is still spreading into all aspects of life in developed countries. The recent research in those countries is bringing more evidence that IT is a leveraging tool for business and not a luxury. This paper discusses the potential role IT could play in developing a country. We start by raising the awareness about the major factors of development of relevance to the thesis topic: natural resources, location, industrialization and education. We identify the two main approaches to development and point out the potential of each using cases of two exemplary countries. Finally, we discuss the literature surveyed and the conclusions one could derive about the role of IT in country development
Modelling aspects of oviduct fluid formation in vitro
© 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
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
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 userâgenerated 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 pseudoâcognitive authorities; hate speech and Germanyâs 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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