Counter-examples to the correlated stability conjecture

We demonstrate explicit counter-examples to the Correlated Stability Conjecture (CSC), which claims that the horizon of a black brane is unstable precisely if that horizon has a thermodynamic instability, meaning that its matrix of susceptibilities has a negative eigenvalue. These examples involve phase transitions near the horizon. Ways to restrict or revise the CSC are suggested. One of our examples shows that N=1* gauge theory has a second order chiral symmetry breaking phase transition at a temperature well above the confinement scale.Comment: 18 pages, 5 figures. v2: minor improvements, reference adde

Master field treatment of metric perturbations sourced by the trailing string

We present decoupled, separable forms of the linearized Einstein equations sourced by a string trailing behind an external quark moving through a thermal state of N=4 super-Yang-Mills theory. We solve these equations in the approximations of large and small wave-numbers.Comment: 40 pages, 3 figure

Sumbangan Power Otot Tungkai, Keseimbangan, Koordinasi dan Kepercayaan Diri terhadap Prestasi Poomsae Taekwondo (Studi Korelasional Prestasi Poomsae Altet Taekwondoin di Surakarta)

ABSTRAK Binuko Amarseto. A121308003. 2016. “Sumbangan Power Otot Tungkai, Keseimbangan, Koordinasi dan Kepercayaan Diri terhadap Prestasi Poomsae Taekwondo (Studi Korelasional Prestasi Poomsae Altet Taekwondoin di Surakarta)”. TESIS. Program Studi Ilmu Keolahragaan Pascasarjana Universitas Sebelas Maret Surakarta. Pembimbing: Prof. Dr. Sugiyanto (Pembimbing I), dan Prof. Dr. Agus Kristiyanto, M.Pd. (Pembimbing II). Prestasi Poomsae Taekwondo tidak hanya dicapai dengan hanya mengandalkan faktor ketrampilan teknik, tetapi juga haruslah memperhatikan faktor kondisi fisik dan psikis. Kondisi fisik baik berupa power otot tungkai, keseimbangan, dan koordinasi akan menentukan gerakan dalam setiap teknik Poomsae Taekwondo. Selain itu penilaian prestasi Poomsae Taekwondo terdapat penilaian lainnya yang berupa presentasi daripada ekspresi yang mencerminkan kepercayaan diri seorang atlet. Penelitian ini bertujuan untuk menemukan kebenaran tentang sumbangan power otot tungkai, keseimbangan, koordinasi dan kepercayaan diri terhadap prestasi Poomsae Taekwondo. Penelitian ini menggunakan pendekatan kuantitatif dengan metode penelitian korelasional, populasi dalam penelitian ini adalah atlet usia 13-15 tahun pada dojang se-Surakarta, jumlah sampel yang didapatkan berjumlah 40 responden. Variabel dalam penelitian ini terdiri dari 4 variabel independent yaitu power otot tungkai, keseimbangan, koordinasi dan kepercayaan diri dan 1 variabel dependent yaitu prestasi Poomsae Taekwondo. Teknik analisis data menggunakan analisis korelasi regresi dengan melakukan pengujian prasyarat uji normalitas dan linieritas. Pengujian hipotesis menggunakan analisis regresi dan korelasi masingmasing prediktor dan analisis regresi ganda serta korelasi ganda. Hasil penelitian menunjukkan bahwa power otot tungkai, keseimbangan, koordinasi dan kepercayaan diri berhubungan baik secara parsial dan secara simultan membentuk persamaan regresi. Dimana setiap power otot tungkai meningkat maka akan mengakibatkan peningkatan prestasi Poomsae Taekwondo sebesar 0,018, setiap peningkatan keseimbangan akan mengakibatkan peningkatan prestasi Poomsae Taekwondo sebesar 0,027, setiap peningkatan koordinasi akan mengakibatkan peningkatan prestasi Poomsae Taekwondo sebesar 0,042, setiap peningkatan kepercayaan diri akan mengakibatkan peningkatan prestasi Poomsae Taekwondo sebesar 0,054. Kesimpulan dari penelitian ini adalah power otot tungkai, keseimbangan, koordinasi dan kepercayaan diri berhubungan dan memiliki sumbangan baik secara parsial maupaun simultan terhadap prestasi Poomsae Taekwondo. Kata kunci : Kondisi fisik, Psikologis, Prestasi Poomsae Taekwondo

The stress tensor of a quark moving through N=4 thermal plasma

We develop the linear equations that describe graviton perturbations of AdS_5-Schwarzschild generated by a string trailing behind an external quark moving with constant velocity. Solving these equations allows us to evaluate the stress tensor in the boundary gauge theory. Components of the stress tensor exhibit directional structures in Fourier space at both large and small momentum. We comment on the possible relevance of our results to relativistic heavy ion collisions.Comment: 33 pages, 5 figures. v2: improved low K discussion; other minor improvement

Zinc Gluconate in the Treatment of Dysgeusia—a Randomized Clinical Trial

In the treatment of dysgeusia, the use of zinc has been frequently tried, with equivocal results. The aim of the present randomized clinical trial, which involved a sufficiently large sample, was therefore to determine the efficacy of zinc treatment. Fifty patients with idiopathic dysgeusia were carefully selected. Zinc gluconate (140 mg/day; n = 26) or placebo (lactose; n = 24) was randomly assigned to the patients. The patients on zinc improved in terms of gustatory function (p < 0.001) and rated the dysgeusia as being less severe (p < 0.05). Similarly, signs of depression in the zinc group were less severe (Beck Depression Inventory, p < 0.05; mood scale, p < 0.05). With the exception of the salivary calcium level, which was higher in the zinc patients (p < 0.05), no other significant group differences were found. In conclusion, zinc appears to improve general gustatory function and, consequently, general mood scores in dysgeusia patients

Stability of strings binding heavy-quark mesons

We investigate the stability against small deformations of strings dangling into AdS_5-Schwarzschild from a moving heavy quark-anti-quark pair. We speculate that emission of massive string states may be an important part of the evolution of certain unstable configurations.Comment: 14 pages, 4 figure

String creation in cosmologies with a varying dilaton

FRW solutions of the string theory low-energy effective actions are described, yielding a dilaton which first decreases and then increases. We study string creation in these backgrounds and find an exponential divergence due to an initial space-like singularity. We conjecture that this singularity may be removed by the effects of back-reaction, leading to a solution which at early times is de Sitter space.Comment: 15 pages, latex, one figur

Low frequency quasi-normal modes of AdS black holes

We calculate analytically low frequency quasi-normal modes of gravitational perturbations of AdS Schwarzschild black holes in $d$ dimensions. We arrive at analytic expressions which are in agreement with their counterparts from linearized hydrodynamics in $S^{d-2}\times \mathbb{R}$, in accordance with the AdS/CFT correspondence. Our results are also in good agreement with results of numerical calculations.Comment: 14 page