92 research outputs found
Introduction : cultural transfer(s) between Belgium and Germany, 1940-1944 : ruptures and continuities
Proceedings of the First Karlsruhe Service Summit Workshop - Advances in Service Research, Karlsruhe, Germany, February 2015 (KIT Scientific Reports ; 7692)
Since April 2008 KSRI fosters interdisciplinary research in order to support and advance the progress in the service domain. KSRI brings together academia and industry while serving as a European research hub with respect to service science. For KSS2015 Research Workshop, we invited submissions of theoretical and empirical research dealing with the relevant topics in the context of services including energy, mobility, health care, social collaboration, and web technologies
Youth participation in Finland and in Germany: status analysis and data based recommendations
Relaxation and Stripping: The Evolution of Sizes, Dispersions and Dark Matter Fractions in Major and Minor Mergers of Elliptical Galaxies
We revisit collisionless major and minor mergers of spheroidal galaxies in
the context of the size evolution of elliptical galaxies. The simulations are
performed as a series of mergers with mass-ratios of 1:1 and 1:10 for models
representing pure bulges as well as bulges embedded in dark matter halos. For
major and minor mergers, respectively, we identify and analyze two different
processes, violent relaxation and stripping, leading to size evolution and a
change of the dark matter fraction within the observable effective radius.
Violent relaxation - which is the dominant mixing process for major mergers but
less important for minor mergers - scatters relatively more dark matter
particles than bulge particles to small. Stripping in minor mergers assembles
stellar satellite particles at large radii in halo dominated regions of the
massive host. This strongly increases the size of the bulge into regions with
higher dark matter fractions leaving the inner host structure almost unchanged.
A factor of two mass increase by minor mergers increases the dark matter
fraction by 20 per cent. We present analytic corrections to simple
one-component virial estimates for the evolution of the gravitational radii. If
such a two-component system grows by minor mergers alone its size growth,
, reaches values of ,
significantly exceeding the simple theoretical limit of . For major
mergers the sizes grow with . Our results indicate that
minor mergers of galaxies embedded in massive dark matter halos provide a
potential mechanism for explaining the rapid size growth and the build-up of
massive elliptical systems predicting significant dark matter fractions and
radially biased velocity dispersions at large radii (abbreviated)Comment: accepted for publication in MNRA
Bell Correlations and the Common Future
Reichenbach's principle states that in a causal structure, correlations of
classical information can stem from a common cause in the common past or a
direct influence from one of the events in correlation to the other. The
difficulty of explaining Bell correlations through a mechanism in that spirit
can be read as questioning either the principle or even its basis: causality.
In the former case, the principle can be replaced by its quantum version,
accepting as a common cause an entangled state, leaving the phenomenon as
mysterious as ever on the classical level (on which, after all, it occurs). If,
more radically, the causal structure is questioned in principle, closed
space-time curves may become possible that, as is argued in the present note,
can give rise to non-local correlations if to-be-correlated pieces of classical
information meet in the common future --- which they need to if the correlation
is to be detected in the first place. The result is a view resembling Brassard
and Raymond-Robichaud's parallel-lives variant of Hermann's and Everett's
relative-state formalism, avoiding "multiple realities."Comment: 8 pages, 5 figure
Search for DCC in 158A GeV Pb+Pb Collisions
A detailed analysis of the phase space distributions of charged particles and
photons have been carried out using two independent methods. The results
indicate the presence of nonstatistical fluctuations in localized regions of
phase space.Comment: Talk at the PANIC99 Conference, June 9-16, 199
Present Status and Future of DCC Analysis
Disoriented Chiral Condensates (DCC) have been predicted to form in high
energy heavy ion collisions where the approximate chiral symmetry of QCD has
been restored. This leads to large imbalances in the production of charged to
neutral pions. Sophisticated analysis methods are being developed to
disentangle DCC events out of the large background of events with
conventionally produced particles. We present a short review of current
analysis methods and future prospects.Comment: 12 pages, 5 figures. Invited talk presented at the 13th International
Conference on Ultrarelativistic Nucleus-Nucleus Collisions (Quark Matter 97),
Tsukuba, Japan, 1-5 Dec 199
Multiplicity Distributions and Charged-neutral Fluctuations
Results from the multiplicity distributions of inclusive photons and charged
particles, scaling of particle multiplicities, event-by-event multiplicity
fluctuations, and charged-neutral fluctuations in 158 GeV Pb+Pb
collisions are presented and discussed. A scaling of charged particle
multiplicity as and photons as have been observed, indicating violation of naive wounded nucleon model.
The analysis of localized charged-neutral fluctuation indicates a
model-independent demonstration of non-statistical fluctuations in both charged
particles and photons in limited azimuthal regions. However, no correlated
charged-neutral fluctuations are observed.Comment: Talk given at the International Symposium on Nuclear Physics
(ISNP-2000), Mumbai, India, 18-22 Dec 2000, Proceedings to be published in
Pramana, Journal of Physic
Chronic Tumor Necrosis Factor Alters T Cell Responses by Attenuating T Cell Receptor Signaling
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