4,178 research outputs found
Dementia becoming popular. Representations of a cultural phenomenon in contemporary fiction, the arts, and mainstream media
Die Herausgebenden Aagje Swinnen und Mark Schweda versammeln im vorliegenden Sammelband Expertisen aus verschiedenen Disziplinen, die mit einer Fülle von Fragestellungen und Methoden die Repräsentation und die Popularisierung von Demenz in Literatur, bildender Kunst und den Massenmedien kritisch hinterfragen. Dabei werden sowohl die zugrundeliegenden kommunikativen Prozesse als auch Demenzbilder von negativen Stereotypisierungen bis hin zu neuen, alternativen Diskursen beleuchtet. Der Band verweist auf die bestimmende wie heikle Rolle populärer Medien für die Informationsgesellschaft – gerade im Fall eines die Betroffenen marginalisierenden Phänomens wie Demenz. Dieser reichhaltige Band macht von neuem aufmerksam und gibt sowohl der Forschung als auch politischem Engagement wertvolle Anregungen.Editors Aagje Swinnen and Mark Schweda assemble a variety of expertise from different disciplines, and a range of methods and research designs to critically investigate the representation and the popularization of dementia in literary fiction, the visual arts, and the mass media. The volume sheds light on the communication processes at work and the images of dementia ranging from negative stereotypes to new and alternative discourses. It hints at the crucial and delicate role of mainstream media in the information society – especially when it comes to a phenomenon such as dementia – threatening the agency of those affected. With a very broad scope, this book continues to raise awareness and provides stimuli for research as well as activism
Loyalty on the Frontier, or Sketches of Union Men of the South-West With Incidents and Adventures in Rebellion on the Border
Guerrillas in the Ozarks Accounts of Arkansas\u27s Unionists In no section of the country has the Great Rebellion created such personal hate or separated more widely friends and relations than in the South-West, Lieutenant Colonel A.W. Bishop writes in the introduction to Loyalty...
Quark confinement and color transparency in a gauge-invariant formulation of QCD
We examine a nonlocal interaction that results from expressing the QCD
Hamiltonian entirely in terms of gauge-invariant quark and gluon fields. The
interaction couples one quark color-charge density to another, much as electric
charge densities are coupled to each other by the Coulomb interaction in QED.
In QCD, this nonlocal interaction also couples quark color-charge densities to
gluonic color. We show how the leading part of the interaction between quark
color-charge densities vanishes when the participating quarks are in a color
singlet configuration, and that, for singlet configurations, the residual
interaction weakens as the size of a packet of quarks shrinks. Because of this
effect, color-singlet packets of quarks should experience final state
interactions that increase in strength as these packets expand in size. For the
case of an SU(2) model of QCD based on the {\em ansatz} that the
gauge-invariant gauge field is a hedgehog configuration, we show how the
infinite series that represents the nonlocal interaction between quark
color-charge densities can be evaluated nonperturbatively, without expanding it
term-by-term. We discuss the implications of this model for QCD with SU(3)
color and a gauge-invariant gauge field determined by QCD dynamics.Comment: Revtex, 23 pages; contains additional references with brief comments
on sam
Interquark Potential in Schrodinger Representation
Static charges are introduced in Yang-Mills theory via coupling to heavy
fermions. The states containing static color charges are constructed using
integration over gauge transformations. A functional representation for
interquark potential is obtained. This representation provides a simple
criterion for confinement.Comment: 9pp., Late
Pretreatment cognitive and neural differences between sapropterin dihydrochloride responders and non-responders with phenylketonuria
Sapropterin dihydrochloride (BH4) reduces phenylalanine (Phe) levels and improves white matter integrity in a subset of individuals with phenylketonuria (PKU) known as “responders.” Although prior research has identified biochemical and genotypic differences between BH4 responders and non-responders, cognitive and neural differences remain largely unexplored. To this end, we compared intelligence and white matter integrity prior to treatment with BH4 in 13 subsequent BH4 responders with PKU, 16 subsequent BH4 non-responders with PKU, and 12 healthy controls. Results indicated poorer intelligence and white matter integrity in non-responders compared to responders prior to treatment. In addition, poorer white matter integrity was associated with greater variability in Phe across the lifetime in non-responders but not in responders. These results underscore the importance of considering PKU as a multi-faceted, multi-dimensional disorder and point to the need for additional research to delineate characteristics that predict response to treatment with BH4
From quantum pulse gate to quantum pulse shaper -- enigneered frequency conversion in nonlinear optical waveguides
Full control over the spatio-temporal structure of quantum states of light is
an important goal in quantum optics, to generate for instance single-mode
quantum pulses or to encode information on multiple modes, enhancing channel
capacities. Quantum light pulses feature an inherent, rich spectral
broadband-mode structure. In recent years, exploring the use of integrated
optics as well as source-engineering has led to a deep understanding of the
pulse-mode structure of guided quantum states of light. In addition, several
groups have started to investigate the manipulation of quantum states by means
of single-photon frequency conversion. In this paper we explore new routes
towards complete control of the inherent pulse-modes of ultrafast pulsed
quantum states by employing specifically designed nonlinear waveguides with
adapted dispersion properties. Starting from our recently proposed quantum
pulse gate (QPG) we further generalize the concept of spatio-spectral
engineering for arbitrary \chitwo-based quantum processes. We analyse the
sum-frequency generation based QPG and introduce the difference-frequency
generation based quantum pulse shaper (QPS). Together, these versatile and
robust integrated optics devices allow for arbitrary manipulations of the
pulse-mode structure of ultrafast pulsed quantum states. The QPG can be
utilized to select an arbitrary pulse mode from a multimode input state,
whereas the QPS enables the generation of specific pulse modes from an input
wavepacket with Gaussian-shaped spectrum.Comment: 21 pages, 9 figure
On polynomial solutions of Heun equation
By making use of a recently developed method to solve linear differential
equations of arbitrary order, we find a wide class of polynomial solutions to
the Heun equation. We construct the series solution to the Heun equation before
identifying the polynomial solutions. The Heun equation extended by the
addition of a term, - \s/x, is also amenable for polynomial solutions.Comment: 4 pages, No figur
Gap Domain Wall Fermions
I demonstrate that the chiral properties of Domain Wall Fermions (DWF) in the
large to intermediate lattice spacing regime of QCD, 1 to 2 GeV, are
significantly improved by adding to the action two standard Wilson fermions
with supercritical mass equal to the negative DWF five dimensional mass. Using
quenched DWF simulations I show that the eigenvalue spectrum of the transfer
matrix Hamiltonian develops a substantial gap and that the residual mass
decreases appreciatively. Furthermore, I confirm that topology changing remains
active and that the hadron spectrum of the added Wilson fermions is above the
lattice cutoff and therefore is irrelevant. I argue that this result should
also hold for dynamical DWF and furthermore that it should improve the chiral
properties of related fermion methods.Comment: 12 pages of text, 14 figures, added sect.6 on topology and reference
475°C Embrittlement and Room Temperature Fatigue of Duplex Stainless Steel
Duplex stainless steels (DSSs) are two-phase materials consisting of both the ferritic and the
austenitic phase. The alloys are prone to embrittlement particularly in the temperature range
between 280°C and 512°C. This so-called 475°C embrittlement is caused by a
decomposition of the ferritic phase into a chromium-rich α' and an iron-rich α phase. The
objective of this study is to develop a better understanding of the embrittling process of DSS
of type SAF 2205. Embrittled and non-embrittled DSS was fatigue tested in stress-controlled
tests at 475°C and in strain-controlled tests at room temperature. The high temperature
fatigue tests were stopped at different cycle numbers in order to characterize the changing
material conditions by means of room-temperature tensile tests and scanning electron
microscopy pictures of the fracture surfaces
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