Paul Wittgenstein in Great Britain

Most of the existing research on Paul Wittgenstein (1887–1961) focuses on his performing career in central Europe as a left-hand pianist and his commissions from the most prominent composers of the 20th century such as Richard Strauss and Maurice Ravel, and his favourite composer, Franz Schmidt. His British performing career and the compositions Ernest Walker, Norman Demuth and Benjamin Britten composed for and dedicated to him, however, remain relatively unexplored. By examining a variety of primary sources that are disclosed here for the first time, this thesis offers the first scholarly research into Wittgenstein’s performing activities in Great Britain in the 1920s–50s and his British commissions in order to fill a major research gap in Wittgenstein studies. Chapter 1 explores Wittgenstein’s self-recognition as a member of the Viennese aristocracy and the shaping of his musical identity, conception and taste, followed by an overview of the related primary sources that are currently located in Hong Kong and the United Kingdom, a detailed summary of his performing activities in Great Britain and a discussion of the British reception of him as a left-hand pianist. Chapter 2 focuses on Walker and the three compositions he wrote for piano left-hand, two of which he composed before meeting Wittgenstein and one after, and the pianist’s attitude towards them. Chapter 3 brings to light the much-neglected composer Demuth and the two works he composed for Wittgenstein and discusses possible reasons why the pianist never performed them. Chapter 4 examines Wittgenstein’s first and only official British commission, the Diversions, Op. 21 by Britten, and investigates the interaction between composer and pianist in the compositional process and their differing conceptions of the work

Paul Wittgenstein in Great Britain

Most of the existing research on Paul Wittgenstein (1887–1961) focuses on his performing career in central Europe as a left-hand pianist and his commissions from the most prominent composers of the 20th century such as Richard Strauss and Maurice Ravel, and his favourite composer, Franz Schmidt. His British performing career and the compositions Ernest Walker, Norman Demuth and Benjamin Britten composed for and dedicated to him, however, remain relatively unexplored. By examining a variety of primary sources that are disclosed here for the first time, this thesis offers the first scholarly research into Wittgenstein’s performing activities in Great Britain in the 1920s–50s and his British commissions in order to fill a major research gap in Wittgenstein studies. Chapter 1 explores Wittgenstein’s self-recognition as a member of the Viennese aristocracy and the shaping of his musical identity, conception and taste, followed by an overview of the related primary sources that are currently located in Hong Kong and the United Kingdom, a detailed summary of his performing activities in Great Britain and a discussion of the British reception of him as a left-hand pianist. Chapter 2 focuses on Walker and the three compositions he wrote for piano left-hand, two of which he composed before meeting Wittgenstein and one after, and the pianist’s attitude towards them. Chapter 3 brings to light the much-neglected composer Demuth and the two works he composed for Wittgenstein and discusses possible reasons why the pianist never performed them. Chapter 4 examines Wittgenstein’s first and only official British commission, the Diversions, Op. 21 by Britten, and investigates the interaction between composer and pianist in the compositional process and their differing conceptions of the work

Energy Filtering Effect at Source Contact on Ultra-Scaled MOSFETs

We postulate that in ultra-scaled Field Effect Transistors (FET), such as nanowires in sub-7nm technology, the source contact will act as an energy filter and increase the effective temperature of carriers arriving at the channel barrier. This is due to the absence of inelastic scattering in the short source-contact-to-channel region. As a result, the Sub-threshold Slope (SS) will increase substantially. In this paper, we verify this energy filtering effect through numerical calculations and Technology Computer-Aided-Design (TCAD) simulations calibrated to quantum solvers for electrostatics. It is found that SS degradation increases as the source metal workfunction increases. At 300K, in the nanowire simulated, SS increases from 94mV/dec to 109mV/dec for gate length, LG, = 10 nm and from 72mV/dec to 88mV/dec for LG= 15 nm, representing an increase of effective carrier temperature from 300K to more than 340K. The simulation result is also verified by including the Schroedinger equation (SE) for tunneling in TCAD simulation. It is also found that such an effect is worse at higher device temperature and disappears at cryogenic temperature

Relativistic Calculation of the Meson Spectrum: a Fully Covariant Treatment Versus Standard Treatments

A large number of treatments of the meson spectrum have been tried that consider mesons as quark - anti quark bound states. Recently, we used relativistic quantum "constraint" mechanics to introduce a fully covariant treatment defined by two coupled Dirac equations. For field-theoretic interactions, this procedure functions as a "quantum mechanical transform of Bethe-Salpeter equation". Here, we test its spectral fits against those provided by an assortment of models: Wisconsin model, Iowa State model, Brayshaw model, and the popular semi-relativistic treatment of Godfrey and Isgur. We find that the fit provided by the two-body Dirac model for the entire meson spectrum competes with the best fits to partial spectra provided by the others and does so with the smallest number of interaction functions without additional cutoff parameters necessary to make other approaches numerically tractable. We discuss the distinguishing features of our model that may account for the relative overall success of its fits. Note especially that in our approach for QCD, the resulting pion mass and associated Goldstone behavior depend sensitively on the preservation of relativistic couplings that are crucial for its success when solved nonperturbatively for the analogous two-body bound-states of QED.Comment: 75 pages, 6 figures, revised content

The influence of insurance status on access to and utilization of a tertiary hand surgery referral center

BACKGROUND: The purpose of this study was to systematically examine the impact of insurance status on access to and utilization of elective specialty hand surgical care. We hypothesized that patients with Medicaid insurance or those without insurance would have greater difficulty accessing care both in obtaining local surgical care and in reaching a tertiary center for appointments. METHODS: This retrospective cohort study included all new patients with orthopaedic hand problems (n = 3988) at a tertiary center in a twelve-month period. Patient insurance status was categorized and clinical complexity was quantified on an ordinal scale. The relationships of insurance status, clinical complexity, and distance traveled to appointments were quantified by means of statistical analysis. An assessment of barriers to accessing care stratified with regard to insurance status was completed through a survey of primary care physicians and an analysis of both patient arrival rates and operative rates at our tertiary center. RESULTS: Increasing clinical complexity significantly correlated (p < 0.001) with increasing driving distance to the appointment. Patients with Medicaid insurance were significantly less likely (p < 0.001) to present with problems of simple clinical complexity than patients with Medicare and those with private insurance. Primary care physicians reported that 62% of local surgeons accepted patients with Medicaid insurance and 100% of local surgeons accepted patients with private insurance. Forty-four percent of these primary care physicians reported that, if patients who were underinsured (i.e., patients with Medicaid insurance or no insurance) had been refused by community surgeons, they were unable to drive to our tertiary center because of limited personal resources. Patients with Medicaid insurance (26%) were significantly more likely (p < 0.001) to fail to arrive for appointments than patients with private insurance (11%), with no-show rates increasing with the greater distance required to reach the tertiary center. CONCLUSIONS: Economically disadvantaged patients face barriers to accessing specialty surgical care. Among patients with Medicaid coverage or no insurance, local surgical care is less likely to be offered and yet personal resources may limit a patient’s ability to reach distant centers for non-emergency care. LEVEL OF EVIDENCE: Prognostic Level II. See Instructions for Authors for a complete description of levels of evidence

Vertical Confinement and Evolution of Reentrant Insulating Transition in the Fractional Quantum Hall Regime

We have observed an anomalous shift of the high field reentrant insulating phases in a two-dimensional electron system (2DES) tightly confined within a narrow GaAs/AlGaAs quantum well. Instead of the well-known transitions into the high field insulating states centered around $\nu = 1/5$, the 2DES confined within an 80\AA-wide quantum well exhibits the transition at $\nu = 1/3$. Comparably large quantum lifetime of the 2DES in narrow well discounts the effect of disorder and points to confinement as the primary driving force behind the evolution of the reentrant transition.Comment: 5 pages, 4 figure

Theory of proximity effect in superconductor/ferromagnet heterostructures

We present a microscopic theory of proximity effect in the ferromagnet/superconductor/ferromagnet (F/S/F) nanostructures where S is s-wave low-T_c superconductor and F's are layers of 3d transition ferromagnetic metal. Our approach is based on the solution of Gor'kov equations for the normal and anomalous Green's functions together with a self-consistent evaluation of the superconducting order parameter. We take into account the elastic spin-conserving scattering of the electrons assuming s-wave scattering in the S layer and s-d scattering in the F layers. In accordance with the previous quasiclassical theories, we found that due to exchange field in the ferromagnet the anomalous Green's function F(z) exhibits the damping oscillations in the F-layer as a function of distance z from the S/F interface. In the given model a half of period of oscillations is determined by the length \xi_m^0 = \pi v_F/E_ex, where v_F is the Fermi velocity and E_ex is the exchange field, while damping is governed by the length l_0 = (1/l_{\uparrow} + 1/l_{\downarrow})^{-1} with l_{\uparrow} and l_{\downarrow} being spin-dependent mean free paths in the ferromagnet. The superconducting transition temperature T_c(d_F) of the F/S/F trilayer shows the damping oscillations as a function of the F-layer thickness d_F with period \xi_F = \pi/\sqrt{m E_ex}, where m is the effective electron mass. We show that strong spin-conserving scattering either in the superconductor or in the ferromagnet significantly suppresses these oscillations. The calculated T_c(d_F) dependences are compared with existing experimental data for Fe/Nb/Fe trilayers and Nb/Co multilayers.Comment: 13 pages, REVTeX4, 8 PS-figures; improved version, submitted to PR

The Mathematics of Routing in Massively Dense Ad-Hoc Networks

International audienceComputing optimal routes in massively dense adhoc networks be-comes intractable as the number of nodes becomes very large. One recent ap-proach to solve this problem is to use a fluid type approximation in which the whole network is replaced by a continuum plain. Various paradigms from physics have been used recently in order to solve the continuum model. We propose in this paper an alternative modeling and solution approach similar to a model by Beckmann [3] developed more than fifty years ago from the area of road traffic