A wireless bioimpedance device for abdominal fatness monitoring

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Evaluación del hábitat y vivienda con enfoques de sustentabilidad. Barrio Ricardo Brugada (Chacarita alta y Chacarita baja) en Asunción, Paraguay. Estudio de caso.

La situación de la vivienda es un tema no resuelto a nivel internacional, lo cual motiva estudios y alternativas de solución para eliminar el déficit acumulado dando respuestas a demandas sobre todo de las clases más vulnerables y necesitadas de la población. En la ciudad de Asunción, en Paraguay, específicamente en el barrio Ricardo Brugada, se manifiestan serios problemas de confortabilidad de las viviendas, de habitabilidad, de calidad de vida de la de sus habitantes. El objetivo del trabajo es evaluar el hábitat y la vivienda en el contexto del barrio Ricardo Brugada, con enfoques de sustentabilidad hacia el cumplimiento de los Objetivos de Desarrollo Sostenible, (ODS). El diseño de la investigación es no experimental, de alcance descriptivo y de corte transversal; los instrumentos utilizados son la encuesta y guías de análisis documental y registro de observación. Las conclusiones indican que la concepción de calidad del hábitat se encuentra ausente; el hábitat y las viviendas, son inundables, inconfortables precarias e insustentables. El barrio Ricardo Brugada presenta características propias de tugurios haciendo un uso inadecuado del suelo urbano por lo que requieren de intervenciones planificadas con participación de la comunidad, sobre todo considerando el fuerte arraigo al espacio en la se encuentran ubicadas sus viviendas. Es necesaria la implementación de políticas, regulaciones y planes, que garanticen la infraestructura técnica, urbanística para que se cumpla la sostenibilidad del barrio.CONACYT - Consejo Nacional de Ciencia y TecnologíaPROCIENCI

A geometric approach to time evolution operators of Lie quantum systems

Lie systems in Quantum Mechanics are studied from a geometric point of view. In particular, we develop methods to obtain time evolution operators of time-dependent Schrodinger equations of Lie type and we show how these methods explain certain ad hoc methods used in previous papers in order to obtain exact solutions. Finally, several instances of time-dependent quadratic Hamiltonian are solved.Comment: Accepted for publication in the International Journal of Theoretical Physic

Intermittent hypoxic training and cycling performance in triathletes

Athletes include altitude training as a complement to their conventional training to improve performance. The aim of the study was to analyze the effects on anaerobic threshold (AT) produced by an IHT program in triathletes. 18 male trained triathletes were divided into intermittent hypoxic training group (GIHT: n=9; age: 26±6.73 years, height 173.33±5.94 cm, weight: 66.38±5.91 kg) and control group (GC: n=9; age: 29.27±6.84 years, height 174.89±4.59 cm, weight: 71.59±6.81 kg). The IHT program consisted of two 60-min sessions per week at intensities over the AT and atmospheric conditions between 14.5 and 15% FiO2. Before and after the program, cycling performance in a lactate thresholds test was determined. The treatment caused an improvement in the power output and perceived exertion in AT and enhanced cardiac performance in the aerobic threshold and AT.Actividad Física y Deport

Preliminary u isotopic data in the Cádiz coastal area (SW Spain) as proxy for coastal groundwater discharge

Peer Reviewe

Gender variability in electromyographic activity, in vivo behaviour of the human gastrocnemius and mechanical capacity during the take-off phase of a countermovement jump

PURPOSE: The purpose of this study was to analyse gender differences in neuromuscular behaviour of the gastrocnemius and vastus lateralis during the take-off phase of a countermovement jump (CMJ), using direct measures (ground reaction forces, muscle activity and dynamic ultrasound). METHODS: Sixty-four young adults (aged 18-25 years) participated voluntarily in this study, 35 men and 29 women. The firing of the trigger allowed obtainment of data collection vertical ground reaction forces (GRF), surface electromyography activity (sEMG) and dynamic ultrasound gastrocnemius of both legs. RESULTS: Statistically significant gender differences were observed in the jump performance, which appear to be based on differences in muscle architecture and the electrical activation of the gastrocnemius muscles and vastus lateralis. So while men developed greater peak power, velocity take-offs and jump heights, jump kinetics compared to women, women also required a higher electrical activity to develop lower power values. Additionally, the men had higher values pennation angles and muscle thickness than women. CONCLUSION: Men show higher performance of the jump test than women, due to significant statistical differences in the values of muscle architecture (pennation angle and thickness muscle), lower Neural Efficiency Index and a higher amount of sEMG activity per second during the take-off phase of a CMJ.Actividad Física y Deport

Final State Interactions in Hypernuclear Decay

We present an update of the One-Meson-Exchange (OME) results for the weak decay of s- and p-shell hypernuclei (Ref. Phys. Rev. C {\bf 56}, 339 (1997)), paying special attention to the role played by final state interactions between the emitted nucleons. The present study also corrects for a mistake in the inclusion of the $K$ and $K^*$ exchange mechanisms, which substantially increases the ratio of neutron-induced to proton-induced transitions, $\Gamma_n/\Gamma_p$. With the most up-to-date model ingredients, we find that the OME approach is able to describe very satisfactorily most of the measured observables, including the ratio $\Gamma_n/\Gamma_p$.Comment: 20 pages, 2 eps figure

Evaluación de 11 híbridos de caña de azúcar (Saccharum spp.) en la región central de Veracruz, México

Objective: The objective of this study was to select new hybrids of sugarcane (Saccharum spp.) adapted to the area supplyof the Central Progreso sugar mill located in Paso del Macho, Veracruz, Mexico.Design/methodology/approach: A group of 11 new hybrids were established in the agroindustrial phase, in ordercompare their adaptation and field and industrial performance using the commercial hybrids Mex 69-290 and CP 72-2086 as controls.Results: The results obtained indicated that during the plant cycle and under local soil conditions, the ColMex 98-100hybrid showed the highest field yield (144.34 t ha?1) and the higher value for the theoretical sugar per hectare (20.26 t),even though it had the lowest values of percentage of sucrose (Pol) (14.64). Regarding the percentage of sucrose, thehighest records were obtained by the ColMex 95-27 (16.97), ColMex 05-627 (16.29), and ColMex 05-47 (16.27) hybrids,with values above the commercial control CP 72-2086 (16.11).Limitations on study/implications: An important limitation for the investigation was the abundance of stones in the topsoil.Findings/conclusions: It can be concluded that after analyzing the agricultural and industrial performance that, the besthybrids were: ColMex 98-100, ColMex 05-47, ColMex 05-627, and CP 71-1038, surpassing the commercial controlsObjetivo: El objetivo de este estudio fue seleccionar nuevos híbridos de caña de azúcar (Saccharum spp.) adaptados al área de abasto del Ingenio Central Progreso localizado en Paso del Macho, Veracruz,México.Diseño/metodología/aproximación: Se estableció en fase agroindustrial un grupo de 11 nuevos híbridos, los cuales fueron comparados por su adaptación y rendimiento de campo e industrial con los híbridos comerciales Mex 69-290 y CP 72-2086.Resultados: Los resultados obtenidos indicaron que durante el ciclo planta y bajo las condiciones edafoclimáticas del lugar, el hibrido ColMex 98-100 resultó ser el mejor en rendimiento de campo (144.34 t ha?1) y mayor valor en azúcar teórica por hectárea (20.26 t), aun teniendo los valores más bajos en porcentaje de sacarosa (Pol) (14.64%). En cuanto a la variable % de sacarosa, los mayores porcentajes lo obtuvieron los híbridos ColMex 95-27 (16.97%), ColMex 05-627 (16.29%) y ColMex 05- 47 (16.27%), con valores por encima del testigo comercial CP 72-2086 (16.11%).Limitaciones del estudio/implicaciones: Una limitación importante para la investigación fue la abundancia de piedras sobre la capa arable del suelo.Hallazgos/conclusiones: Se puede concluir que después de analizar el comportamiento agrícola e industrial, los mejores híbridos fueron: ColMex 98-100, ColMex 05-47, ColMex 05-627 y CP 71-1038,superando a los testigos comerciales

Novel Weak Decays in Doubly Strange Systems

The strangeness-changing ($\Delta S = 1$) weak baryon-baryon interaction is studied through the nonmesonic weak decay of double-$\Lambda$ hypernuclei. Besides the usual nucleon-induced decay $\Lambda N \to N N$ we discuss novel hyperon-induced decay modes $\Lambda \Lambda \to \Lambda N$ and $\Lambda \Lambda \to \Sigma N$. These reactions provide unique access to the exotic $\Lambda \Lambda$K and $\Lambda \Sigma$K vertices which place new constraints on Chiral Pertubation Theory ($\chi$PT) in the weak SU(3) sector. Within a meson-exchange framework, we use the pseudoscalar $\pi,\eta,K$ octet for the long-range part while parametrizing the short-range part through the vector mesons $\rho, \omega, K^*$. Realistic baryon-baryon forces for the $S=0,-1$ and -2 sectors account for the strong interaction in the initial and final states. For $^6_{\Lambda \Lambda}$He the new hyperon-induced decay modes account for up to 4% of the total nonmesonic decay rate. Predictions are made for all possible nonmesonic decay modes.Comment: 19 pages, 2 ps figures, 9 table