RESUMEN
The precise modeling of binary black hole coalescences in generic planar orbits is a crucial step to disentangle dynamical and isolated binary formation channels through gravitational-wave observations. The merger regime of such coalescences exhibits a significantly higher complexity compared to the quasicircular case, and cannot be readily described through standard parametrizations in terms of eccentricity and anomaly. In the spirit of the effective one body formalism, we build on the study of the test-mass limit, and introduce a new modeling strategy to describe the general-relativistic dynamics of two-body systems in generic orbits. This is achieved through gauge-invariant combinations of the binary energy and angular momentum, such as a dynamical "impact parameter" at merger. These variables reveal simple "quasi-universal" structures of the pivotal merger parameters, allowing us to build an accurate analytical representation of generic (bounded and dynamically bounded) orbital configurations. We demonstrate the validity of these analytical relations using 311 numerical simulations of bounded noncircular binaries with progenitors from the RIT and SXS catalogs, together with a custom dataset of dynamical captures generated using the Einstein Toolkit, and test-mass data in bound orbits. Our modeling strategy lays the foundations of accurate and complete waveform models for systems in arbitrary orbits, bolstering observational explorations of dynamical formation scenarios and the discovery of new classes of gravitational wave sources.
RESUMEN
Objetivos: El trabajo en ambientes fríos puede provocar daños a la salud de los trabajadores y ser causa de cuadros de incapacidad temporal. El propósito de este trabajo fue hallar alteraciones en diferentes parámetros de salud (analíticos, tensión arterial y número de infecciones). Sujetos y método: Estudio de cohortes comparando dos poblaciones de 75 trabajadores que realizaban tareas similares en sus puestos de trabajo (principalmente corte y envasado de productos perecederos), en unas condiciones parecidas a excepción de la exposición laboral a frío del primer grupo, realizando el cálculo de tres parámetros para cada efecto de la exposición al frío: Riesgo relativo, Límites de Confianza y grado de significación estadística (p). el nivel de significación se estableció para un valor de p menor de 0,05. Resultados: se hallaron diferencias estadísticamente significativas entre expuestos y no expuestos para las variables presión arterial diastólica (RR=1,12; I. C (95%)= 1,01-1,23; y P = 0,03) y número de infecciones padecidas (P= 0,0486). No hubo diferencias estadísticamente significativas en el resto de variables. Conclusiones:; En este estudio , la exposición a temperaturas de 5 a 10 ºC ocasiona en el grupo de trabajadores expuestos una disminución de las cifras de presión arterial diastólica y un aumento en el número de infecciones padecidas con respecto al grupo control no expuesto (AU)
Objective: working in a cold environment can cause damage to the health of workers. The objective was to find changes in health parameters (analytical, blood pressure and number of infections). Subject and methods: Cohort study comparing two populations of 75 workers performing similar tasks in their jobs (mainly cutting and packaging of perishable products), in similar conditions except for occupational exposure to cold in the first group. It was obtained three parameters calculated for each effect on cold exposure: relative risk, confidence limits and level of statistical significance (p). The significance level was set to a value of p<0,05. Results: Statistically significant differences were found between exposed an unexposed workers in diastolic blood pressure variables (RR = 1.12, CI (95%) = 1,01-1,23; and P=0,03) and number of infections suffered (P=0,0486). There was no statistically significant differences in other variables. Conclusion: In this study, the exposure to temperatures from to 10ºC causes in the group of workers exposed a decrease in diastolic blood pressure levels and an increase in the number of suffered infections compared to the unexposed control group (AU)