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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