Regulation in the Taxi Industry.

This paper examines some of the economic reasons for price and entry regulation in the taxi industry and presents the legal framework under which taxis and hire cars are regulated in England and Wales outside London. It is argued that the current law is defective and should be amended to incorporate explicitly the inter-relationship between fares and vehicle numbers such that the regulators have the discretion to choose between a high price/high availability service and a low price/low availability service

Monogamy of nonlocal quantum correlations

We describe a new technique for obtaining Tsirelson bounds, or upper bounds on the quantum value of a Bell inequality. Since quantum correlations do not allow signaling, we obtain a Tsirelson bound by maximizing over all no-signaling probability distributions. This maximization can be cast as a linear program. In a setting where three parties, A, B, and C, share an entangled quantum state of arbitrary dimension, we: (i) bound the trade-off between AB's and AC's violation of the CHSH inequality, and (ii) demonstrate that forcing B and C to be classically correlated prevents A and B from violating certain Bell inequalities, relevant for interactive proof systems and cryptography.Comment: This is the submitted version. The refereed version, which contains an additional result about strong parallel repetition and corrects some typos, is available on my personal web site at http://bentoner.com/papers/monogamyrs.pdf [PDF

Surveillance technologies as instruments of discipline in the elite sports coaching context: a cautionary post-structural commentary

The use of surveillance technologies as tools to encourage performance enhancement has become an accepted component of elite coaching. Those from the communities of sports physiology, psychology and biomechanics who promote the application of surveillance technologies have reported multiple benefits for the athlete. Conversely, several socio-cultural studies have suggested that surveillance technologies can lead to an oppressive mechanism of control over the athlete, significantly altering the role and responsibilities of the contemporary coach. In this critical commentary we use a post-structural position and adopt Foucault’s disciplinary analysis to contribute to the ongoing debate surrounding the use of surveillance technology in sport. Specifically, we achieve this by labelling surveillance technologies in sport as what Foucault (1977) might call, instruments of discipline, and by explaining the impact they have upon the working coach and the skilled athlete. We present some suggestions surrounding how to most appropriately utilise surveillance technologies in a sports coaching context and conclude by warning against a binary consideration of the use of technology as either good or bad

Enhancing performance proficiency at the expert level: Considering the role of 'somaesthetic awareness'

© 2014 Elsevier Ltd. Objectives: Traditional theories of motor learning (e.g., Fitts & Posner, 1967), along with certain contemporary psychological perspectives (e.g., Weiss & Reber, 2012; Wulf, 2013), postulate that expert performers must relinquish paying conscious attention to, and/or attempting to exert control over, their bodily movements in order to achieve optimal performance. Challenging such largely unquestioned conceptual approaches, however, is an emerging body of evidence (e.g., see Montero, 2010; Shusterman, 2011) which indicates that 'somatic reflection' (i.e., a conscious focus on bodily movement) is an important mediator of continuous improvement (i.e., the fact that certain performers continue to improve their skills even after becoming experts) at the elite level of sport. The present position paper seeks to elucidate and resolve this apparent paradox concerning the role of bodily awareness in expertise. Design: Literature review and position statement. Method: To achieve this latter aim, we draw on empirical evidence (e.g., from research on somatic attention) and theory (e.g., Shusterman's, 2008, theory of body consciousness) to elucidate the role of bodily awareness in facilitating continuous improvement at the elite level of sport. Results and conclusion: In doing so, we sketch some theoretical and practical implications of Shusterman's (2008, 2011, 2012) theory of 'somaesthetics' for contemporary research on expertise in sport

The Smectic A to C Phase Transition in Isotropic Disordered Environments

We study theoretically the smectic A to C phase transition in isotropic disordered environments. Surprisingly, we find that, as in the clean smectic A to C phase transition, smectic layer fluctuations do not affect the nature of the transition, in spite of the fact that they are much stronger in the presence of the disorder. As a result, we find that the universality class of the transition is that of the "Random field XY model" (RFXY)

Universality for Moving Stripes: A Hydrodynamic Theory of Polar Active Smectics

We present a hydrodynamic theory of polar active smectics, for systems both with and without number conservation. For the latter, we find quasi long-ranged smectic order in d=2 and long-ranged smectic order in d=3. In d=2 there is a Kosterlitz-Thouless type phase transition from the smectic phase to the ordered fluid phase driven by increasing the noise strength. For the number conserving case, we find that giant number fluctuations are greatly suppressed by the smectic order; that smectic order is long-ranged in d=3; and that nonlinear effects become important in d=2.Comment: 6 pages, 2 figure

Simulating Quantum Correlations with Finite Communication

Assume Alice and Bob share some bipartite $d$-dimensional quantum state. A well-known result in quantum mechanics says that by performing two-outcome measurements, Alice and Bob can produce correlations that cannot be obtained locally, i.e., with shared randomness alone. We show that by using only two bits of communication, Alice and Bob can classically simulate any such correlations. All previous protocols for exact simulation required the communication to grow to infinity with the dimension $d$. Our protocol and analysis are based on a power series method, resembling Krivine's bound on Grothendieck's constant, and on the computation of volumes of spherical tetrahedra.Comment: 19 pages, 3 figures, preliminary version in IEEE FOCS 2007; to appear in SICOM