Exotic Scalar States in the AdS/CFT Correspondence

We investigate a family of solutions of Type IIb supergravity which asymptotically approach AdS_5 X S^5 but contain a non-constant dilaton and volume scalar for the five-sphere. These solutions preserve an SO(1,3) X SO(6) symmetry. We discuss the solution in the context of the AdS/CFT correspondence, and we find that as well as running coupling from the nontrivial dilaton, the corresponding field theory has no supersymmetry and displays confinement at least for a certain range of parameters.Comment: 18 pages. 3 figures. Revised discussion section, added references. Final version to appear in JHE

Spin-Two Glueballs, Positive Energy Theorems and the AdS/CFT Correspondence

We determine the spectrum of graviton excitations in the background geometry of the AdS soliton in p+2 dimensions. Via the AdS/CFT correspondence this corresponds to determining the spectrum of spin two excitations in the dual effective p-dimensional field theories For the cases of D3- and M5-branes these are the spin two glueballs of QCD_3 and QCD_4 respectively. For all values of p we find an exact degeneracy of the spectra of these tensor states and certain scalar excitations. Our results also extend the perturbative proof of a positive energy conjecture for asymptotically locally AdS spacetimes (originally proposed for p=3) to an arbritrary number of dimensions.Comment: 25 pages, 3 figure

ORTHOPEDIC LEG BRACE

Knee braces generally have been rigid in both the knee bending direction and in the knee straightening direction unless a manually operated release is incorporated in them to allow the knee to bend. Desirably a braced knee joint should effectively duplicate the compound, complex, actions of a normal knee. The key to knee braces is the knee joint housing. The housing herein carries a number of cam action pawls. with teeth adapted to engage the internal teeth of a ratchet ring mounted in the housing. Cam action return springs and the shape of the cam action pawl teeth allow rotation of the ratchet ring in a leg straightening direction while still supporting a load. The leg can then be extended during walking while at the same time being prevented by the cam action pawls from buckling in the knee bending direction

Build in My Backyard! TOD in Carmel

NIMBY (not in my backyard) attitudes in the United States have shifted over the past decade, particularly in communities that are embracing trails and active living components to attract residents and businesses. Carmel, Indiana, is one such forward-thinking city. This session examines the environmental, social, and economic impacts of trail-oriented development surrounding the Monon Greenway

Comments on Multiple M2-branes

Recently a three-dimensional field theory was derived that is consistent with all the symmetries expected of the worldvolume action for multiple M2-branes. In this note we examine several physical predictions of this model and show that they are in agreement with expected M2-brane dynamics. In particular, we discuss the quantization of the Chern-Simons coefficient, the vacuum moduli space, a massive deformation leading to fuzzy three-sphere vacua, and a possible large n limit. In this large n limit, the fuzzy funnel solution correctly reproduces the mass of an M5-brane.Comment: 18 pages. Published versio

SPEAR-1: An experiment to measure current collection in the ionosphere by high voltage biased conductors

An experiment is described in which a high electrical potential difference, up to 45 kV, was applied between deployed conducting spheres and a sounding rocket in the ionosphere. Measurements were made of the applied voltage and the resulting currents for each of 24 applications of different high potentials. In addition, diagnostic measurements of optical emissions in the vicinity of the spheres, energetic particle flow to the sounding rocket, dc electric field and wave data were made. The ambient plasma and neutral environments were measured by a Langmuir probe and a cold cathode neutral ionization gauge, respectively. The payload is described and examples of the measured current and voltage characteristics are presented. The characteristics of the measured currents are discussed in terms of the diagnostic measurements and the in-situ measurements of the vehicle environment. In general, it was found that the currents observed were at a level typical of magnetically limited currents from the ionospheric plasma for potentials less than 12 kV, and slightly higher for larger potentials. However, due to the failure to expose the plasma contactor, the vehicle sheath modified the sphere sheaths and made comparisons with the analytic models of Langmuir-Blodgett and Parker-Murphy less meaningful. Examples of localized enhancements of ambient gas density resulting from the operation of the attitude control system thrusters (cold nitrogen) were obtained. Current measurements and optical data indicated localized discharges due to enhanced gas density that reduced the vehicle-ionosphere impedance

The park is ruining our livelihoods. We support the park! Unravelling the paradox of attitudes to protected areas

Despite considerable field-based innovation and academic scrutiny, the nexus between conservation approaches, local support for parks and park effectiveness remains quite puzzling. Common approaches to understanding notions of environmental justice are to understand distributional and procedural issues, representation in decision making, and recognition of authorities and claims. We took a different approach and analysed environmental justice claims through institutional, ideational and psychological lenses. We sought to understand how the national park could have such broad support from local communities despite their acknowledgement that it severely curtailed their livelihoods. We conducted 100 household interviews in three villages that border Nam Et-Phou Louey National Protected Area. Our study found that villagers 1) hold on to broken promises by the State for agricultural activities and alternative revenues without fully changing forest use behaviours; 2) were influenced heavily by the ‘educational’ programmes by the State; 3) accepted the authority of the State and lack of participation in decision-making based on historical experiences and values; 4) justified their burdens by over-emphasising the positive aspects of the park. Our findings present a complementary framework to explain environmental justice claims, allowing for a nuanced analysis of how people respond to justices and injustices, and specifically how injustices can be identified through proven social science concepts

Low doses of caffeine: Enhancement of physical performance in elite adolescent male soccer players

Purpose: Large doses of ~6 mgkg-1 body mass (BM) have improved performance during intermittent running, jumping and agility protocols. However, there is sparse data on low doses of caffeine especially in elite adolescent soccer players. Method: 15 elite youth soccer players (177.3±4.8 cm, 66.9±7.9 kg and 16±1 yr) participated in the study. Participants consumed 1, 2 or 3 mgkg-1 caffeine in a gelatin capsule or a 2 mgkg-1 placebo in a single blind, randomised, crossover study design. Testing consisted of a 20 m sprint, arrowhead agility (CoD R or L), counter-movement jump (CMJ) and Yo-Yo intermittent recovery test level-1 (Yo-Yo IR1). Post-exercise CMJ performance was assessed as participants exited Yo-Yo IR1. Data were analysed using a Bayesian multi-level regression model to provide explained variance and probabilities of improvement (p=%). Results: 3 mgkg-1 caffeine presented the highest probabilities of change compared to placebo across a range of tests (mean ± SD, p= %). 20m sprint times were 3.15±0.10s vs 3.18±0.09s (p=73%), CoD-R times were 8.43±0.24s vs 8.55±0.25s (p=99%), CoD-L times were 8.44±0.22s vs 8.52±0.18s (p=85%), Yo-Yo IR1 distance were 2440±531m vs 2308±540m (p=15%), pre-exercise CMJ height was 41.6±7.2cm vs 38±8.5cm (p=96%). Post-exercise CMJ was higher in the 3 mgkg-1 compared to placebo (42.3±8cm vs 36.6±8cm [p=100%]). 1-2 mgkg-1 caffeine also demonstrated the ability to enhance performance but are task dependent. Conclusion: Low doses of caffeine improve performance but are dose and task dependent. 3 mgkg-1 caffeine improved performance across the majority of tests with potential to further improve post-exercise CMJ height