Queer to be kind: Exploring Western media discourses about the “Eastern bloc” during the 2007 and 2014 Eurovision Song Contests

This article examines the voting results and Western European media coverage of the 2007 and 2014 Eurovision Song Contests. The Austrian drag act Conchita Wurst (the alter ego of an openly gay man) won in 2014, whilst Serbian entrant Marija Šerifović, portrayed in Western European media as lesbian at the time, won in 2007. We first explore the extent to which there was an East-West voting divide in both contests. In 2014, while there was some elite hostility against Conchita in Eastern Europe, the popular support was on a similar level to that in Western Europe. In 2007, we find no significant geographic divide in support for Šerifović. However, when we examine mainstream UK and German media coverage during and after both contests, we find strong anti-Eastern European discourses that are at odds with the similarity in the public voting. We employ the concept of homonationalism to interrogate inconsistent Western media discourses: the East was depicted as a site of homophobia and the West as a site of tolerance in 2014, whilst the queer aesthetic/identity of Šerifović was largely overlooked in 2007

Ground states and dynamics of population-imbalanced Fermi condensates in one dimension

By using the numerically exact density-matrix renormalization group (DMRG) approach, we investigate the ground states of harmonically trapped one-dimensional (1D) fermions with population imbalance and find that the Larkin-Ovchinnikov (LO) state, which is a condensed state of fermion pairs with nonzero center-of-mass momentum, is realized for a wide range of parameters. The phase diagram comprising the two phases of i) an LO state at the trap center and a balanced condensate at the periphery and ii) an LO state at the trap center and a pure majority component at the periphery, is obtained. The reduced two-body density matrix indicates that most of the minority atoms contribute to the LO-type quasi-condensate. With the time-dependent DMRG, we also investigate the real-time dynamics of a system of 1D fermions in response to a spin-flip excitation.Comment: 20 pages, 15 figures, accepted for publication in New Journal of Physic

A Mechanical Mass Sensor with Yoctogram Resolution

Nanoelectromechanical systems (NEMS) have generated considerable interest as inertial mass sensors. NEMS resonators have been used to weigh cells, biomolecules, and gas molecules, creating many new possibilities for biological and chemical analysis [1-4]. Recently, NEMS-based mass sensors have been employed as a new tool in surface science in order to study e.g. the phase transitions or the diffusion of adsorbed atoms on nanoscale objects [5-7]. A key point in all these experiments is the ability to resolve small masses. Here we report on mass sensing experiments with a resolution of 1.7 yg (1 yg = 10^-24 g), which corresponds to the mass of one proton, or one hydrogen atom. The resonator is made of a ~150 nm long carbon nanotube resonator vibrating at nearly 2 GHz. The unprecedented level of sensitivity allows us to detect adsorption events of naphthalene molecules (C10H8) and to measure the binding energy of a Xe atom on the nanotube surface (131 meV). These ultrasensitive nanotube resonators offer new opportunities for mass spectrometry, magnetometry, and adsorption experiments.Comment: submitted version of the manuscrip

Acquired demyelination but not genetic developmental defects in myelination leads to brain tissue stiffness changes

Changes in axonal myelination are an important hallmark of aging and a number of neurological diseases. Demyelinated axons are impaired in their function and degenerate over time. Oligodendrocytes, the cells responsible for myelination of axons, are sensitive to mechanical properties of their environment. Growing evidence indicates that mechanical properties of demyelinating lesions are different from the healthy state and thus have the potential to affect myelinating potential of oligodendrocytes. We performed a high-resolution spatial mapping of the mechanical heterogeneity of demyelinating lesions using atomic force microscope-enabled indentation. Our results indicate that the stiffness of specific regions of mouse brain tissue is influenced by age and degree of myelination. Here we specifically demonstrate that acquired acute but not genetic demyelination leads to decreased tissue stiffness, which could influence the remyelination potential of oligodendrocytes. We also demonstrate that specific brain regions have unique ranges of stiffness in white and grey matter. Our ex vivo findings may help the design of future in vitro models to mimic the mechanical environment of the brain in healthy and diseased states. The mechanical properties of demyelinating lesions reported here may facilitate novel approaches in treating demyelinating diseases such as multiple sclerosis

Collision Dynamics and Solvation of Water Molecules in a Liquid Methanol Film

Environmental molecular beam experiments are used to examine water interactions with liquid methanol films at temperatures from 170 K to 190 K. We find that water molecules with 0.32 eV incident kinetic energy are efficiently trapped by the liquid methanol. The scattering process is characterized by an efficient loss of energy to surface modes with a minor component of the incident beam that is inelastically scattered. Thermal desorption of water molecules has a well characterized Arrhenius form with an activation energy of 0.47{\pm}0.11 eV and pre-exponential factor of 4.6 {\times} 10^(15{\pm}3) s^(-1). We also observe a temperature dependent incorporation of incident water into the methanol layer. The implication for fundamental studies and environmental applications is that even an alcohol as simple as methanol can exhibit complex and temperature dependent surfactant behavior.Comment: 8 pages, 5 figure

The nature of localization in graphene under quantum Hall conditions

Particle localization is an essential ingredient in quantum Hall physics [1,2]. In conventional high mobility two-dimensional electron systems Coulomb interactions were shown to compete with disorder and to play a central role in particle localization [3]. Here we address the nature of localization in graphene where the carrier mobility, quantifying the disorder, is two to four orders of magnitude smaller [4,5,6,7,8,9,10]. We image the electronic density of states and the localized state spectrum of a graphene flake in the quantum Hall regime with a scanning single electron transistor [11]. Our microscopic approach provides direct insight into the nature of localization. Surprisingly, despite strong disorder, our findings indicate that localization in graphene is not dominated by single particle physics, but rather by a competition between the underlying disorder potential and the repulsive Coulomb interaction responsible for screening.Comment: 18 pages, including 5 figure

ifo Konjunkturprognose 2008: Konjunktur verliert an Fahrt

Am 13. Dezember 2007 stellte das ifo Institut im Rahmen seines vorweihnachtlichen Pressegesprächs seine Prognose für die Jahre 2008 und 2009 vor. Die Weltwirtschaft hat in diesem Jahr mit 5,2% erneut sehr kräftig expandiert. Allerdings sind die Risiken für die Konjunktur im Gefolge der Turbulenzen an den internationalen Finanzmärkten inzwischen merklich gestiegen. So hat sich das vom ifo Institut erhobene Weltwirtschaftsklima im 4. Quartal 2007 deutlich verschlechtert. Sowohl die Einschätzungen der derzeitigen wirtschaftlichen Lage als auch die Erwartungen für die nächsten sechs Monate wurden nach unten revidiert. Die Verschlechterung des ifo Wirtschaftsklimas betrifft alle drei großen Weltregionen, also Westeuropa, Nordamerika und Asien. Dabei ist der stärkste Rückgang des Klimaindikators in Nordamerika, und dort in erster Linie in den USA zu verzeichnen. Diese Datenkonstellation deutet daraufhin, dass sich das Tempo der Weltkonjunktur merklich verlangsamen wird. Die deutsche Konjunktur ist zum Jahresende 2007 weiter aufwärts gerichtet, wenn auch mit nachlassender Kraft. Die Dynamik hatte im vergangenen Winter einen Höhepunkt erreicht und lässt inzwischen wieder deutlich nach. Wie das ifo Institut im Dezember 2006 erwartet hatte, hat sich der seit 2005 laufende Aufschwung trotz der massiven Erhöhung der Mehrwertsteuer fortgesetzt. Die Auftriebskräfte aus dem In- und Ausland waren kräftig genug, um die restriktiven Wirkungen der Finanzpolitik zu verkraften. Konjunkturmotor war weiterhin die Auslandsnachfrage, die trotz der massiven Aufwertung des Euro gegenüber dem US-Dollar aufgrund der dynamischen Weltkonjunktur kräftig blieb. Im Jahresdurchschnitt 2007 expandierte das reale Bruttoinlandsprodukt um 2,5%. Allerdings gab es in diesem Jahr erneut eine etwas geringere Zahl von Arbeitstagen als 2006. Nach Ausschaltung dieser Kalenderschwankung ist die Zuwachsrate der Produktion auf 2,6% zu veranschlagen, was knapp unter dem Durchschnitt der alten EU-Länder liegt

Thin Ice Target for 16^{16}O(p,p') experiment

A windowless and self-supporting ice target is described. An ice sheet with a thickness of 29.7 mg/cm$^2$ cooled by liquid nitrogen was placed at the target position of a magnetic spectrometer and worked stably in the $^{16}$O$(p,p')$ experiment at $E_{p}=392$ MeV. Background-free spectra were obtained.Comment: 14 pages, 4 figures, Nucl. Instr. & Meth. A (in press

Competing Ultrafast Energy Relaxation Pathways in Photoexcited Graphene

For most optoelectronic applications of graphene a thorough understanding of the processes that govern energy relaxation of photoexcited carriers is essential. The ultrafast energy relaxation in graphene occurs through two competing pathways: carrier-carrier scattering -- creating an elevated carrier temperature -- and optical phonon emission. At present, it is not clear what determines the dominating relaxation pathway. Here we reach a unifying picture of the ultrafast energy relaxation by investigating the terahertz photoconductivity, while varying the Fermi energy, photon energy, and fluence over a wide range. We find that sufficiently low fluence ($\lesssim$ 4 $\mu$J/cm$^2$) in conjunction with sufficiently high Fermi energy ($\gtrsim$ 0.1 eV) gives rise to energy relaxation that is dominated by carrier-carrier scattering, which leads to efficient carrier heating. Upon increasing the fluence or decreasing the Fermi energy, the carrier heating efficiency decreases, presumably due to energy relaxation that becomes increasingly dominated by phonon emission. Carrier heating through carrier-carrier scattering accounts for the negative photoconductivity for doped graphene observed at terahertz frequencies. We present a simple model that reproduces the data for a wide range of Fermi levels and excitation energies, and allows us to qualitatively assess how the branching ratio between the two distinct relaxation pathways depends on excitation fluence and Fermi energy.Comment: Nano Letters 201