946 research outputs found
S-duality invariant perturbation theory improved by holography
We study anomalous dimensions of unprotected low twist operators in the
four-dimensional supersymmetric Yang-Mills theory. We
construct a class of interpolating functions to approximate the dimensions of
the leading twist operators for arbitrary gauge coupling . The
interpolating functions are consistent with previous results on the
perturbation theory, holographic computation and full S-duality. We use our
interpolating functions to test a recent conjecture by the
superconformal bootstrap that upper bounds on the dimensions are saturated at
one of the duality-invariant points and . It turns
out that our interpolating functions have maximum at , which
are close to the conjectural values by the conformal bootstrap. In terms of the
interpolating functions, we draw the image of conformal manifold in the space
of the dimensions. We find that the image is almost a line despite the
conformal manifold is two-dimensional. We also construct interpolating
functions for the subleading twist operator and study level crossing phenomenon
between the leading and subleading twist operators. Finally we study the
dimension of the Konishi operator in the planar limit. We find that our
interpolating functions match with numerical result obtained by Thermodynamic
Bethe Ansatz very well. It turns out that analytic properties of the
interpolating functions reflect an expectation on a radius of convergence of
the perturbation theory.Comment: 39+14 pages, 22 figures; v3: minor correction
VECTORS: Video communication through opportunistic relays and scalable video coding
Crowd-sourced video distribution is frequently of interest in the local
vicinity. In this paper, we propose a novel design to transfer such content
over opportunistic networks with adaptive quality encoding to achieve
reasonable delay bounds. The video segments are transmitted between source and
destination in a delay tolerant manner using the Nearby Connections Android
library. This implementation can be applied to multiple domains, including farm
monitoring, wildlife, and environmental tracking, disaster response scenarios,
etc. In this work, we present the design of an opportunistic contact based
system, and we discuss basic results for the trial runs within our institute.Comment: 13 pages, 6 figures, and under 3000 words for submission to the
SoftwareX journa
Accuracy of clinical diagnosis in meniscal tears
Introduction: Meniscal injuries of the knee are common indications for arthroscopic knee surgery. Most of the meniscal tears can be diagnosed by clinical evaluation alone. This study aims to test the accuracy of the commonly performed tests for meniscal tears in our set up.
Method: This was a prospective observational study of 32 symptomatic knees that underwent clinical evaluation followed by arthroscopy. The sensitivity, specificity and diagnostic accuracy of three clinical tests (McMurray’s test, Apley’s compression test and Joint line tenderness) were calculated against arthroscopic findings.
Result: Among clinical tests, maximum sensitivity (94.44%) was with Joint Line Tenderness for Medial Meniscus Tear (MMT) and minimum (54.54%) with Apley’s Compression Test for Lateral meniscus Tear (LMT). Specificity was maximum (90.48%) with Joint Line Tenderness for LMT and minimum (64.28%) with Apley’s Compression Test for MMT. Diagnostic accuracy was maximum (90.6%) with McMurray’s test for LMT and minimum (75%) with Apley’s Compression Test for MMT and LMT.
Conclusion: All three clinical tests (McMurray’s, Apley’s compression and Joint line tenderness) were found reliable for diagnosing meniscus tears. Joint Line Tenderness had the best diagnostic accuracy followed by McMurray’s test
Unusual Presentation of the Intracranial Arachnoid Cysts Posing with Treatment Dilemma: A Case Series
A case series comprising of 3 patients with intracranial arachnoid cysts presented with atypical features raising the doubt on the symptomatic nature of the cyst. It posed dilemma on the further management of these patients. In two patients, surgical intervention to decompress the arachnoid cyst was performed which drastically improved the patient’s symptoms. One patient with intracranial arachnoid cyst who has been conservatively managed persists to have symptoms
Logarithmic Corrections to Twisted Indices from the Quantum Entropy Function
We compute logarithmic corrections to the twisted index in
four-dimensional and string theories using the
framework of the Quantum Entropy Function. We find that these vanish, matching
perfectly with the large--charge expansion of the corresponding microscopic
expressions.Comment: v2 : 22 pages, presentation significantly improved, published in JHE
Cast immobilization in fracture distal radius with wrist in dorsiflexion
Background: The purpose of this study was to evaluate the anatomical and functional outcome of cast immobilization in fracture distal radius with wrist in dorsiflexion. Study design selected was prospective cohort study.Methods: The study group comprised 60 patients, with a mean follow-up of 3 month. Patients were evaluated for radial height, radial inclination and volar tilt according to Lindstrom criteria. Functional outcome were assessed with PRWE score.Results: Mean loss of radial height was 4.11 mm. Mean loss of radial inclination was 6.85 degree and mean loss of volar tilt was 7.06 degree at the end of 3 month follow up. As per Lindstrom criteria 88% were excellent to fair and 93% were excellent to fair functional outcome as per PRWE score.Conclusions: Cast immobilization in fracture distal radius with wrist in dorsiflexion produces better anatomical and functional outcome.
Labial adhesion or fusion-an unusual cause of urinary incontinence in an elderly woman
Labial adhesion/fusion is an uncommon cause of urinary and vulval complaints in adult females, with unknown incidence. We present a case report of an elderly woman who presented with voiding difficulty, recurrent urinary tract infection (UTI) and urinary incontinence. She was treated by surgical division of the adhesions and had complete resolution of her symptoms
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