2,297 research outputs found
Polarization Sensitive Optical Coherence Tomography for Blood Glucose Monitoring in Human Subjects
A device based on Polarization sensitive optical coherence tomography is
developed to monitor blood glucose levels in human subjects. The device was
initially tested with tissue phantom. The measurements with human subjects for
various glucose concentration levels are found to be linearly dependent on the
degree of circular polarization obtainable from the PS-OCT.Comment: 12 pages, 5 figure
GraphSE: An Encrypted Graph Database for Privacy-Preserving Social Search
In this paper, we propose GraphSE, an encrypted graph database for online
social network services to address massive data breaches. GraphSE preserves
the functionality of social search, a key enabler for quality social network
services, where social search queries are conducted on a large-scale social
graph and meanwhile perform set and computational operations on user-generated
contents. To enable efficient privacy-preserving social search, GraphSE
provides an encrypted structural data model to facilitate parallel and
encrypted graph data access. It is also designed to decompose complex social
search queries into atomic operations and realise them via interchangeable
protocols in a fast and scalable manner. We build GraphSE with various
queries supported in the Facebook graph search engine and implement a
full-fledged prototype. Extensive evaluations on Azure Cloud demonstrate that
GraphSE is practical for querying a social graph with a million of users.Comment: This is the full version of our AsiaCCS paper "GraphSE: An
Encrypted Graph Database for Privacy-Preserving Social Search". It includes
the security proof of the proposed scheme. If you want to cite our work,
please cite the conference version of i
The interplay between the charged Higgs and squark-gluino events at the LHC
In some extensions of the standard model with extended Higgs sectors, events
from new particle production may pass the selection criteria for Higgs search
in different channels at the LHC - 14 TeV and mimic Higgs signals. This
intriguing possibility is illustrated by PYTHIA based simulations using several
representative points in the parameter space of the minimal supersymmetric
standard model (MSSM) including a point in the minimal supergravity model
consistent with the Dark matter (DM) relic density data. Our simulations
explore the interplay between the charged Higgs signal and typical
squark-gluino events. We argue that the standard selections like the one based
on the polarization properties of the 's from charged Higgs decay, though
adequate for handling the SM background, may not be very efficient in the
presence of SUSY backgrounds. We then propose an alternative search strategy
based on pure kinematics which sufficiently controls both the SM and the MSSM
backgrounds. For charged Higgs masses () in the deep decoupling regime
(600 GeV \lsim m_{H^{\pm}} \lsim 800 GeV) this method works well and extends
the LHC reach close to 800 GeV for an integrated luminosity of 30
with or without the SUSY background. For a lighter charged Higgs a judicious
combination of the old selections and some of the cuts proposed by us may
disentangle the Higgs signal from the squark-gluino backgrounds quite
effectively
Determining an optimal method for the detection of odorous volatile organic compounds in tiger marking fluid in an effort to aid conservation
Chemical communication plays an integral part of conserving tigers. Tigers, elephants, lions, and many other mammals use marking fluid (MF) and other excrements as means to communicate with each other and their ecosystem.
This research focuses on understanding which compounds eluted in tiger (MF) contribute to the overall odor of MF. Specifically, which compounds are responsible for behavioral responses. This study collected MF samples from four, sixteen year old Panthera tigris tigris from South Khayerbari Tiger Rescue Center in West Bengal, India. In this work, MF has been studied to gain a perspective on how tigers utilize MF for territorial and reproductive communication. Specifically, this study expanded upon previous research methodologies that characterized the odor of MF, of Panthera tigris tigris, based on thin-layer chromatography (TLC). TLC was utilized for the separation and identification of lipid compounds. Alkali was added to the TLC paper for the identification of compounds, specifically 2-acetyl-1-pyrroline (2-AP). This research study compared the concepts of TLC against solid-phase microextraction (SPME) and multidimensional gas chromatography mass spectrometry-olfactometry (mdGC-MS-O) for detection of odorous volatile organic compounds. TLC analysis of the samples was performed at the University of Calcutta and mdGC-MS-O work was performed at Iowa State University.
The mdGC-MS-O technique uncovered 19 odorous compounds including 2-AP, suggesting that 2-AP is not the only contributing odor to the smell of Panthera tigris tigris M
Combined Toxicity and Bioconcentration of Fluoride and Arsenic in African Catfish Clarias gariepinus (Burchell, 1822)
Laboratory experiments were performed to examine the combined toxic effects of two important aquatic contaminants viz., arsenic and fluoride on African catfish, Clarias gariepinus. Additionally, the bio concentration factors (BCFs) of the two contaminants in tissues and blood of catfish were also determined. The LC50 for sodium fluoride and arsenic trioxide were determined to be 619.3 mg L-1, 30.3 mg L-1, respectively. Erratic swimming movements with hyperactivity, loss of equilibrium, augmented air gulping and decreased food consumption were observed in the experimental groups. In co-exposure groups of arsenic and fluoride, the concentration of fluoride in fish tissues increased with increasing water fluoride concentration in the test aquaria with significant differences (
Delayed Severe Drug Induced Cholestasis After Anabolic Steroids Exposure
Anabolic steroids therapy is linked to a distinctive form of acute cholestasis that generally arises within 1 to 4 months of starting therapy but may be delayed to as long as 6 to 24 months in some reported cases. We are presenting an unusual case where acute cholestasis happened 5 weeks after discontinuing short course (7 days) of anabolic steroids.
A 20-year-old African American male without significant past medical history presented with jaundice, mild nausea and generalized pruritis. He admitted to self-initiation of oral Stanozolol 40 mg daily for 7-days about 5 weeks before his admission. No prior incidence and no significant alcohol use. Vitals signs unremarkable and physical exam was unremarkable except for jaundice and sclera icterus. No hepatosplenomegaly. Liver function profile with ALT 44 IU/L, AST 72 IU/L, ALP 266 IU/L, & total bilirubin of 21.4 mg/Dl. Extensive hepatitis workup was negative and a CT-guided liver biopsy was performed which showed marked hepatocanalicular cholestasis. This is reflective of drug induced cholestasis.
Our case highlights the possibility of delayed liver injury even after a short anabolic steroids course which typically happen while taking the medication for an extended period (more than 1 month)
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