113 research outputs found
Informe de Floricultura Colombiana: Total Disposición sobre la Fuerza de Trabajo
This document is part of a digital collection provided by the Martin P. Catherwood Library, ILR School, Cornell University, pertaining to the effects of globalization on the workplace worldwide. Special emphasis is placed on labor rights, working conditions, labor market changes, and union organizing.ILRF_Informe_Floricultura_Colombiana.pdf: 8363 downloads, before Oct. 1, 2020
Glycated nail protein as an indicator of longterm glycemic control
A study was conducted in Government Stanley Medical College and Hospital, in the Department of Biochemistry, titled glycated nail protein as an indicator of long term glycemic control.
A total of 70 individuals, 35 known diabetic patients and 35 healthy individuals were enrolled for the study. The patients were longitudinally followed up for three months to assess their glycemic status.
The aim was to establish whether the nail fructosamine could be used to determine the glycemic status of the diabetic patients over the preceding three months which is the turnover time of the nail from root to the free edge. The
Hemoglobin A1C estimation in the same patients at a same time was used to confirm the changes in the patient’s glycemic status and compared with nail fructosamine. A linear relationship was established after analysis of the results. (p value 0.009). A value of less than 0.5 is significant.
There was also a significant difference of nail fructosamine between cases and controls (p value 0.09). The mean value of controls (2.18μmol/g equivalents of nail) lie in the physiological range (2.0-2.5μmol/g)as reported by Goldsmith et al in 1985.
The patients values determined initially and finally were above the physiological range (2.68 and 3.1μmol/g)
The fasting blood glucose and serum fructosamine were also measured for assessing the blood glucose levels. These parameters on comparison with nail fructosamine showed linear relationship.
No interference was done in the treatment schedule of the patients.
The risk factors like positive family history, blood pressure, BMI, lipid profile were also analyzed. Results showed only moderate increase in risk factors among patients than in the controls.
To conclude the nail fructosamine assay could be standardized for testing the levels of blood glucose over the previous three month’s duration.
The reference range in south Indian population needs to be established.
The interference like drugs and other dietary substances which might react
with nitrobluetetrazolium need to be studied and the procedure can be used as routine laboratory investigations to assess the blood glucose levels on long term basis. The method is cheaper, easier to perform and sample collection and preservation is easier (nail clippings form finger nails) and noninvasive.
Pre analytical variation of the analyte as observed with other analytes is practically nil.
Cost of testing is less compared to other indices. Precision of the assay is good. CV Calculated was 7.8%
Mergers of Supermassive Black Holes in Astrophysical Environments
Modeling the late inspiral and merger of supermassive black holes is central
to understanding accretion processes and the conditions under which
electromagnetic emission accompanies gravitational waves. We use fully general
relativistic, hydrodynamics simulations to investigate how electromagnetic
signatures correlate with black hole spins, mass ratios, and the gaseous
environment in this final phase of binary evolution. In all scenarios, we find
some form of characteristic electromagnetic variability whose pattern depends
on the spins and binary mass ratios. Binaries in hot accretion flows exhibit a
flare followed by a sudden drop in luminosity associated with the plunge and
merger, as well as quasi-periodic oscillations correlated with the
gravitational waves during the inspiral. Conversely, circumbinary disk systems
are characterized by a low luminosity of variable emission, suggesting
challenging prospects for their detection.Comment: 9 pages, 5 figures, 1 table, replaced with version accepted for
publication in Ap
Complete phenomenological gravitational waveforms from spinning coalescing binaries
The quest for gravitational waves from coalescing binaries is customarily
performed by the LIGO-Virgo collaboration via matched filtering, which requires
a detailed knowledge of the signal. Complete analytical coalescence waveforms
are currently available only for the non-precessing binary systems. In this
paper we introduce complete phenomenological waveforms for the dominant
quadrupolar mode of generically spinning systems. These waveforms are
constructed by bridging the gap between the analytically known inspiral phase,
described by spin Taylor (T4) approximants in the restricted waveform
approximation, and the ring-down phase through a phenomenological intermediate
phase, calibrated by comparison with specific, numerically generated waveforms,
describing equal mass systems with dimension-less spin magnitudes equal to 0.6.
The overlap integral between numerical and phenomenological waveforms ranges
between 0.95 and 0.99.Comment: Proceeding for the GWDAW-14 conference. Added reference in v
Binary Black Hole Waveform Extraction at Null Infinity
In this work, we present a work in progress towards an efficient and
economical computational module which interfaces between Cauchy and
characteristic evolution codes. Our goal is to provide a standardized waveform
extraction tool for the numerical relativity community which will allow CCE to
be readily applied to a generic Cauchy code. The tool provides a means of
unambiguous comparison between the waveforms generated by evolution codes based
upon different formulations of the Einstein equations and different numerical
approximation.Comment: 11 pages, 7 figure
Moving black holes via singularity excision
We present a singularity excision algorithm appropriate for numerical
simulations of black holes moving throughout the computational domain. The
method is an extension of the excision procedure previously used to obtain
stable simulations of single, non-moving black holes. The excision procedure
also shares elements used in recent work to study the dynamics of a scalarfield
in the background of a single, boosted black hole. The robustness of our
excision method is tested with single black-hole evolutions using a coordinate
system in which the coordinate location of the black hole, and thus the
excision boundary, moves throughout the computational domain.Comment: 9 pages and 11 figure
Finding apparent horizons and other two-surfaces of constant expansion
Apparent horizons are structures of spacelike hypersurfaces that can be
determined locally in time. Closed surfaces of constant expansion (CE surfaces)
are a generalisation of apparent horizons. I present an efficient method for
locating CE surfaces. This method uses an explicit representation of the
surface, allowing for arbitrary resolutions and, in principle, shapes. The CE
surface equation is then solved as a nonlinear elliptic equation.
It is reasonable to assume that CE surfaces foliate a spacelike hypersurface
outside of some interior region, thus defining an invariant (but still
slicing-dependent) radial coordinate. This can be used to determine gauge modes
and to compare time evolutions with different gauge conditions. CE surfaces
also provide an efficient way to find new apparent horizons as they appear e.g.
in binary black hole simulations.Comment: 21 pages, 8 figures; two references adde
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