“RESPONSABILIDAD PROFESIONAL EN EL EJERCICIO DE LA CIRUGÍA EN EL HOSPITAL DE CONCENTRACIÓN SATÉLITE DEL ISSEMYM”

La práctica de la Cirugía ha dado lugar a diversos problemas ̩técnicos que han exigido al Cirujano a desarrollar una elevada calidad moral. Para solucionar dichos conflictos ha sido necesario recurrir a códigos deontológicos, los cuales a través del tiempo han sufrido modificaciones, y que gracias a esto ha sido posible desarrollar una práctica quirúrgica en función de dos componentes: el técnico relativo a las acciones y a los hechos, y el moral, referente a los valores

Dinámica térmica de la piel de adolescentes después del trote

Resumen: Como objetivo fundamental de esta investigación es determinar el comportamiento termográfico de la piel en brazos, piernas, cara y cuello de los adolescentes ante la aplicación de trote de 12 minutos, en donde participaron 25 sujetos con edades comprendidas entre 13-15 años, de ambos sexos. Cada uno de los participantes realizó el trote de 12 minutos sin calentamiento y se tomaron termografías del plano anterior y posterior del cuerpo antes y después del trote. Se encontró que el comportamiento de la temperatura de la piel en extremidades superiores desciende hasta en 0.72 ºC en la vista anterior, en la vista posterior aumenta hasta en 1.69 º principalmente en el pliegue del codo, en las extremidades inferiores aumenta en ambas vistas tanto en anterior como posterior logrando aumento de la temperatura entre 0.43 ºC y 1.13 ºC. Se logra destacar que la dinámica de la temperatura de la piel ante una carga aeróbica de no más de 12 minutos en adolescentes disminuye de forma general para la parte anterior del cuerpo y para la parte posterior aumenta, este comportamiento de cambio térmico entre aumento y disminución es menor de 2°C. Abstract: The main objective of this particular research is to determine the thermographic behavior of the arms, legs, face and neck of teenagers skin after jogging for 12 minutes. In this experiment participated 25 subjects of 13 to 15 years old, of both sexes. Each one of them jog for 12 minutes without warming up before. We proceed to took thermographys of each one of the front and back of their bodies before and after the experiment. We found that the temperature’s behavior of the skin on the upper extremities descents to 0.72°C (on the lower body). On the upper body the temperature rises to 1.69°C, mainly on the elbow. On the lower extremities the temperatures rises on both lower and upper parts of the body on an interval of 0.43°C and 1.13°C. We note that the skins temperatures dynamic with an aerobic activity of not more than 12 minutes on teenagers decreases on a general way on the lower part of the body, while on the upper part increases, this change of thermic behavior between rising and decreasing of temperature is less than 2°C

A multi-wavelength analysis of the diffuse H II region G25.8700+0.1350

We present a multi-wavelength investigation of the H ii region G25.8700+0.1350, located in the inner part of the Galaxy. In radio continuum emission, the region is seen as a bright arc-shaped structure. An analysis of the H i line suggests that G25.8700+0.1350 lies at a distance of 6.5 kpc. The ionized gas is bordered by a photodissociation region, which is encircled by a molecular structure where four molecular clumps are detected. At infrared wavelengths, the region is also very conspicuous. Given the high level of visual absorption in the region, the exciting stars should be searched for in the infrared band. In this context, we found in the literature one Wolf–Rayet and one red supergiant, which, together with 37 2MASS sources that are candidate O-type stars, could be related to the origin of G25.8700+0.1350. Finally, as expanding H ii regions are hypothesized to trigger star formation, we used different infrared point source catalogues to search for young stellar object candidates (cYSOs). A total of 45 cYSOs were identified projected on to the molecular clouds.This project was partially financed by the Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET) of Argentina under projects PIP 01299, PIP 0226, PIP 00356 and PIP 00107, and Universidad Nacional de La Plata under 2012-2014 PPID/G002 and 11/G120

Electrochemical Impedance Spectroscopy (EIS): A Review Study of Basic Aspects of the Corrosion Mechanism Applied to Steels

AC impedance measurements have been applied for over twenty years in electrochemistry and physics to investigate the electrical properties of conductive materials and their interfaces using an external electrical impulse (VOLTAGE, V or CURRENT, I) as driving force. Furthermore, its application has recently appeared to be destined in the Biotechnology field as an effective tool for rapid microbiologic diagnosis of living organism in situ. However, there is no doubt that the electrochemical impedance spectroscopy (EIS) is still one of the most useful techniques around the world for metal corrosion control and its monitoring. Corrosion has long been recognized as one of the most expensive stumbling blocks that concern many industries and government agencies, because it is a steel destructive phenomenon that occurs due to the chemical interaction with aqueous environments and takes place at the interface between metal and electrolyte producing an electrical charge transfer or ion diffusion process. Consequently, it is experimentally possible to determine through the EIS technique the mechanism and control that kinectics of corrosion reactions encounter. First, EIS data is collected through a potentiostat/ galvanostat apparatus. After, it is fitted to a mathematical model (i.e. an equivalent electrical circuit, EEC) for its interpretation and analysis, fundamentally seeking a meaningful physical interpretation. Finally, this review reports some basic aspects of the corrosion mechanism applied to steels through the experimental EIS response using Nyquist or Bode plots. Examples are given for different applied electrochemical impedance cases in which steel is under study intentionally exposed to a corrosive aqueous solution by applying a sinusoidal potential at various test conditions

Uso de Allium Cepa test como indicador de eficacia para el tratamiento de efluentes

RESUMEN  Cuando los vertidos líquidos de una industria se descargan a un conducto pluvial o a la red cloacal general, la probabilidad de que estos efluentes terminen en un curso de agua superficial o subterránea es muy alta. La disminución o eliminación total de la biotoxicidad de estos efluentes  antes de su descarte es de vital importancia para prevenir impactos negativos sobre la biodiversidad del ecosistema que recibe los vertidos.El uso del test de Allium cepa como bioindicador en ensayos de biotoxicidad y genotoxicidad está reconocido a nivel mundial. En el presente trabajo proponemos utilizar el test como un indicador para evaluar la eficacia de los tratamientos que las industrias realizan sobre sus efluentes líquidos antes del vertido a la red cloacal general

A new model for freedom of movement using connectomic analysis

The problem of whether we can execute free acts or not is central in philosophical thought, and it has been studied by numerous scholars throughout the centuries. Recently, neurosciences have entered this topic contributing new data and insights into the neuroanatomical basis of cognitive processes. With the advent of connectomics, a more refined landscape of brain connectivity can be analysed at an unprecedented level of detail. Here, we identify the connectivity network involved in the movement process from a connectomics point of view, from its motivation through its execution until the sense of agency develops. We constructed a “volitional network” using data derived from the Brainnetome Atlas database considering areas involved in volitional processes as known in the literature. We divided this process into eight processes and used Graph Theory to measure several structural properties of the network. Our results show that the volitional network is small-world and that it contains four communities. Nodes of the right hemisphere are contained in three of these communities whereas nodes of the left hemisphere only in two. Centrality measures indicate the nucleus accumbens is one of the most connected nodes in the network. Extensive connectivity is observed in all processes except in Decision (to move) and modulation of Agency, which might correlate with a mismatch mechanism for perception of Agency

Acoustically Levitated Whispering-Gallery Mode Microlasers

Acoustic levitation has become a crucial technique for contactless manipulation in several fields, particularly in biological applications. However, its application in the photonics field remains largely unexplored. In this study, we implement an affordable and innovative phased-array levitator that enables stable trapping in the air of micrometer dye-doped droplets, thereby enabling the creation of microlasers. For the first time, this paper presents a detailed performance of the levitated microlaser cavity, supported by theoretical analysis concerning the hybrid technology based on the combination of whispering-gallery modes and acoustic fields. The pressure field distribution inside the acoustic cavity is numerically solved and qualitatively matched with the schlieren deflectometry technique. The optical lasing features of the levitated microlasers are highly comparable with those devices based On-a-Chip registering maximum Q-factors of ~ 105, and minimum lasing thresholds ~ 150 nJ cm−2. The emission comb is explained as a sum of multiple individual-supported whispering-gallery modes. The use of novel touchless micrometric lasers, produced with an acoustic levitator brings new technological opportunities based on photonic-acoustic technological platforms

Metodología de diseño basada en FPGA para la predistorsión digital de amplificadores de potencia

Este artículo describe el diseño e implementación de un sistema de predistorsión digital (DPD) sin memoria para la linealización de amplificadores de potencia. El prototipo del sistema y la arquitectura se implementaron usando un kit de desarrollo DSP-FPGA. La metodología de diseño es descrita en bloques prácticos y analizada en detalle con énfasis especial en el dominio digital, donde se ejecutaron los algoritmos propuestos. La estrategia del sistema predistorsionador está basada en una tabla de búsqueda compleja que permite programar las curvas de conversión inversas de AM-AM y AM-PM de un amplificador de potencia

Physical characterization of S169: a prototypical IR bubble associated with the massive star-forming region IRAS 12326-6245

Aims. With the aim of studying the physical properties of Galactic IR bubbles and to explore their impact in massive star formation, we present a study of the IR bubble S169, associated with the massive star forming region IRAS 12326-6245. Methods. We used CO(2-1),13CO(2-1), C18O(2-1), HCN(3-2), and HCO+ (3-2) line data obtained with the APEX telescope using the on-the-fly full sampling technique to study the properties of the molecular gas in the nebula and the IRAS source . To analyze the properties and distribution of the dust, we made use of images obtained from the IRAC-GLIMPSE, Herschel, and ATLASGAL archives. The properties of the ionized gas in the nebula were studied using radio continuum and Hα images obtained from the SUMSS survey and SuperCOSMOS database, respectively. In our search for stellar and protostellar objects in the region, we used point source calalogs obtained from the MSX, WISE, GLIMPSE, 2MASS, AAVSO, ASCC-2.5V3, and GAIA databases. Results. The new APEX observations allowed us to identify three molecular components, each one associated with different regions of the nebula, namely: at −39 km s−1 (component A), −25 km s−1 (component B), and −17 km s−1 (component C). Component A is shown to be the most dense and clumpy. Six molecular condensations (MC1 to MC6) were identified in this component, with MC3 (the densest and more massive one) being the molecular counterpart of IRAS 12326-6245. For this source, we estimated an H2 column density up to 8×1023 cm−2 . An LTE analysis of the high density tracer lines HCO+ (3-2) and HCN(3-2) on this source, assuming 50 and 150 K, respectively, indicates column densities of N(HCO+) = (5.2 ± 0.1) × 1013 cm−2 and N(HCN) = (1.9 ± 0.5) × 1014 cm−2. To explain the morphology and velocity of components A, B, and C , we propose a simple model consisting of a partially complete semisphere-like structure expanding at ∼ 12 km s−1. The introduction of this model has led to a discussion about the distance to both S169 and IRAS 12326-6245, which was estimated to be ∼ 2 kpc. Several candidate YSOs were identified, projected mostly onto the molecular condensations MC3, MC4, and MC5, which indicates that the star-formation process is very active at the borders of the nebula. A comparison between observable and modeled parameters was not enough to discern whether the collect-and-collapse mechanism is acting at the edge of S169. However, other processes such as radiative-driven implosion or even a combination of both mechanisms, namely, collect-and-collapse and radiative-driven implosion, could be acting simultaneously in the region.Instituto de Astrofísica de La Plat