Photodissociation of NO2 by pulsed laser light at 6943 A

Two photon absorption in photodissociation of nitrogen dioxide using pulsed laser at 6943

Evaluierung des Interesseninventars RIASEC-RRK anhand von Studenten und Absolventen der Sinologie und Japanologie sowie deren Kontrastierung

Ziel der Diplomarbeit war die Evaluation des neu entwickelten Interesseninventars RIASEC-RRK anhand von Studenten und Absolventen des Sinologie- und Japanologiestudiums. Für die Studienrichtung Sinologie konnte der Hollandcode AIS (Artistic, Investigative und Social) ermittelt werden. Der Dreiercode der Studienrichtung Japanologie lautet IAS. Ein Indiz für die Validität stellt die überwiegende Übereinstimmung der in dieser Stichprobe ermittelten Geschlechtsunterschiede mit den bereits in der Literatur vorhandenen Ergebnissen diesbezüglich dar. Weiters weist der RIASEC-RRK gute Reliabilitäten auf. Die von Holland postulierte hexagonale Struktur konnte in dieser Untersuchung nicht bestätigt werden. Zusätzlich wurden einige differentialpsychologische Betrachtungen angestellt

Rechtspopulismus in Westeuropa anhand der Beispiele Frankreich, Belgien, Dänemark und Österreich im Vergleich

In dieser Diplomarbeit werden vier verschiedene rechtspopulistische Parteien aus Frankreich, Belgien, Dänemark und Österreich durchleuchtet, ihre Geschichte als auch ihr Aufbau sind dabei genauso behandelt wie auch die Gründe für ihre electorale Erfolge, als auch Entgleisungen der einzelnen Funktionäre

DETC2005-84524 CROSS-SECTION DEFORMATION IN THE ABSOLUTE NODAL COORDINATE FORMULATION

ABSTRACT In this investigation, the deformation modes defined in the finite element absolute nodal coordinate formulation using several strain definitions are discussed. In order to accurately define strain components that can have easy physical interpretation, a material coordinate system is introduced to define the material element rotation and deformation. The results obtained in this study clearly show cross-section deformation modes eliminated when the number of the finite element nodal coordinates is systematically and consistently reduced. Using the procedure discussed in this paper, one can obtain a reduced order dynamic model, eliminate position vector gradients that introduce high frequencies to the solution of some problems, achieve the continuity of the remaining gradients at the nodal points, and obtain a formulation that automatically satisfies the principle of work and energy

Potential to measure quantum effects in recent all-optical radiation reaction experiments

The construction of 10 PW class laser facilities with unprecedented intensities has emphasized the need for a thorough understanding of the radiation reaction process. We describe simulations for a recent all-optical colliding pulse experiment, where a GeV scale electron bunch produced by a laser wakefield accelerator interacted with a counter-propagating laser pulse. In the rest frame of the electron bunch, the electric field of the laser pulse is increased by several orders of magnitude, approaching the Schwinger field and leading to substantial variation from the classical Landau-Lifshitz model. Our simulations show how the final electron and photon spectra may allow us to differentiate between stochastic and semi-classical models of radiation reaction, even when there is significant shot-to-shot variation in the experimental parameters. In particular, constraints are placed on the maximum energy spread and shot-to-shot variation permissible if a stochastic model is to be proven with confidence

Wavelength-selected Neutron Pulses Formed by a Spatial Magnetic Neutron Spin Resonator

AbstractWe present a novel type of spatial magnetic neutron spin resonator whose time and wavelength resolution can be de- coupled from each other by means of a travelling wave mode of operation. Combined with a pair of highly efficient polarisers such a device could act simultaneously as monochromator and chopper, able to produce short neutron pulses, whose wavelength, spectral width and duration could be varied almost instantaneously by purely electronic means with- out any mechanical modification of the experimental setup. To demonstrate the practical feasibility of this technique we have designed and built a first prototype resonator consisting of ten individually switchable modules which allows to produce neutron pulses in the microsecond regime. It was installed at a polarised 2.6Å neutron beamline at the 250kW TRIGA research reactor of the Vienna University of Technology where it could deliver pulses of 55μs duration, which is about three times less than the passage time of the neutrons through the resonator itself. In order to further improve the achievable wavelength resolution to about 3% a second prototype resonator, consisting of 48 individual modules with optimised field homogeneity and enlarged beam cross-section of 6 × 6cm2 was developed. We present the results of first measurements which demonstrate the successful operation of this device

A 3D absolute nodal coordinate finite element model to compute the initial configuration of a railway catenary

In this paper we propose a method of finding the initial equilibrium configuration of cable structures discretized by finite elements applied to the shape-finding of the railway overhead system. Absolute nodal coordinate formulation finite elements, which allow for axial and bending deformation, are used for the contact and messenger wires. The other parts of the overhead system are discretized with non-linear bars or equivalent springs. The proposed method considers the constraints introduced during the assembly of the catenary, such as the position of droppers, cable tension, and height of the contact wire. The formulation is general and can be applied to different catenary configurations or transitions both in 2D and 3D with straight or curved track paths. A comparison of the results obtained for reference catenaries in the bibliography is also included.The authors wish to thank Generatitat Valenciana for the financial support received in the framework of the Programme PROME-TEO 2012/023.Tur Valiente, M.; García, E.; Baeza González, LM.; Fuenmayor Fernández, FJ. (2014). A 3D absolute nodal coordinate finite element model to compute the initial configuration of a railway catenary. Engineering Structures. 71:234-243. https://doi.org/10.1016/j.engstruct.2014.04.015S2342437