Efectos de la diversificación ganadera de las explotaciones agrícolas en la adopción de innovaciones

publishedTomo I . Sección: Sistemas Ganaderos-Economía y Gestión. Sesión: Sostenibilidad. Ponencia nº 3

Modelo de inversi¢n basado en la ecuaci¢n de Euler con l¡mite m ximo de endeudamiento: evidencia emp¡rica internacional

Este trabajo estudia los determinantes de la inversi¢n empresarial, incorporando un l¡mite m ximo de endeudamiento a un modelo de inversi¢n basado en la ecuaci¢n de Euler. Las diferentes versiones del modelo desarrollado se han estimado por el M‚todo Generalizado de los Momentos para datos de Canad , Espa¤a, Estados Unidos y Reino Unido. Los resultados obtenidos muestran que la sensibilidad de la inversi¢n al cash flow es mayor para las empresas restringidas financieramente que para las no restringidas. Esta mayor sensibilidad es causada por la mayor repercusi¢n que tienen las imperfecciones del mercado en las empresas restringidas financieramente. En consecuencia, se pone de manifiesto la necesidad de considerar por separado las empresas restringidas y no restringidas para identificar los determinantes de la inversi¢n empresarial. This paper studies the determinants of firms? investment. Our model with a credit limit is derived from the Euler equation. The set of models obtained derived have been estimated by using the Generalized Method of Moments with data from Canada, Spain, The United States and The United Kingdom. Our results show that the sensitivity of investment to cash flow is greater for financially constrained firms than for those financiallyunconstrained. This greater sensitivity is caused by the higher effect of the capital market imperfections in the financially constrained firms. As a consequence, a separate study of the firm according to the financial constraints suffered is required in order to precisely identify the determinants of firms` investment.inversi¢n empresarial, restricciones financieras, ecuaci¢n de Euler, datos de panel. firms? investment, financial constrains, Euler equation, panel data.

Dispositivos Ópticos utilizados en la Vía Aérea Difícil (parte II)

Continuamos con la revisión de los distintos Dispositivos Ópticos (DO) que estamos llevando a cabo y con la que pretendemos simplificar y aglutinar la gran cantidad de DO que existen actualmente en el mercado

Mayor riesgo de obesidad y obesidad central en mujeres post-menopáusicas sedentarias

Objetivos: Establecer la influencia de un comportamiento sedentario (tiempo sentado) sobre la composición corporal en mujeres mayores de Aragón. Métodos: Participaron un total de 457 mujeres. Las horas de caminar se utilizaron para definir comportamiento activo (> 1 vs. 4 vs. < 4 h/día). La evaluación antropométrica se llevó a cabo siguiendo las recomendaciones ISAK. La grasa corporal se estimó mediante bio-impedancia eléctrica. Se utilizó ANOVA para analizar diferencias entre grupos y análisis de regresión logística para estudiar la asociación entre los comportamientos activos y sedentarios con la composición corporal. Resultados: El grupo de mujeres sedentarias tenía mayor peso, IMC, perímetro de cintura y masa grasa que las mujeres no sedentarias (todos p < 0,05). Además, aquellas mujeres que permanecían sentadas más de 4 horas al día tenían un riesgo 1,7, 2,7 y 1,7 veces mayor de padecer sobrepeso, obesidad y obesidad central, respectivamente, independientemente de las horas de caminar (95% IC [1,006-2,739]; [1,518-4,491] y [1,154-2,565]). Cuando el nivel de actividad y sedentarismo fueron estudiados de manera conjunta, se observó que las mujeres no activas y sedentarias tenían 2,0 veces más probabilidad de tener sobrepeso (95% IC [0,995-3,961]), 4,4 de padecer obesidad (95% IC [2,101-9,264]) y 2,3 de sufrir obesidad central (95% IC [1,329-3,939]) que las mujeres con un comportamiento activo y no sedentario. Conclusión: Permanecer sentado más de 4 horas al día aumenta el riesgo de padecer sobrepeso, obesidad y obesidad central, independientemente de las horas de caminar en mujeres postmenopáusicas

The Spanish Infrared Camera onboard the EUSO-BALLOON (CNES) flight on August 24, 2014

The EUSO-Balloon (CNES) campaign was held during Summer 2014 with a launch on August 24. In the gondola, next to the Photo Detector Module (PDM), a completely isolated Infrared camera was allocated. Also, a helicopter which shooted flashers flew below the balloon. We have retrieved the Cloud Top Height (CTH) with the IR camera, and also the optical depth of the nonclear atmosphere have been inferred with two approaches: The first one is with the comparison of the brightness temperature of the cloud and the real temperature obtained after the pertinent corrections. The second one is by measuring the detected signal from the helicopter flashers by the IR Camera, considering the energy of the flashers and the location of the helicopter

The atmospheric science of JEM-EUSO

An Atmospheric Monitoring System (AMS) is critical suite of instruments for JEM-EUSO whose aim is to detect Ultra-High Energy Cosmic Rays (UHECR) and (EHECR) from Space. The AMS comprises an advanced space qualified infrared camera and a LIDAR with cross checks provided by a ground-based and airborne Global Light System Stations. Moreover the Slow Data Mode of JEM-EUSO has been proven crucial for the UV background analysis by comparing the UV and IR images. It will also contribute to the investigation of atmospheric effects seen in the data from the GLS or even to our understanding of Space Weather

EUSO-SPB1 mission and science

The Extreme Universe Space Observatory on a Super Pressure Balloon 1 (EUSO-SPB1) was launched in 2017 April from Wanaka, New Zealand. The plan of this mission of opportunity on a NASA super pressure balloon test flight was to circle the southern hemisphere. The primary scientific goal was to make the first observations of ultra-high-energy cosmic-ray extensive air showers (EASs) by looking down on the atmosphere with an ultraviolet (UV) fluorescence telescope from suborbital altitude (33 km). After 12 days and 4 h aloft, the flight was terminated prematurely in the Pacific Ocean. Before the flight, the instrument was tested extensively in the West Desert of Utah, USA, with UV point sources and lasers. The test results indicated that the instrument had sensitivity to EASs of ⪆ 3 EeV. Simulations of the telescope system, telescope on time, and realized flight trajectory predicted an observation of about 1 event assuming clear sky conditions. The effects of high clouds were estimated to reduce this value by approximately a factor of 2. A manual search and a machine-learning-based search did not find any EAS signals in these data. Here we review the EUSO-SPB1 instrument and flight and the EAS search

Neutrino Target-of-Opportunity Observations with Space-based and Suborbital Optical Cherenkov Detectors

Cosmic-ray accelerators capable of reaching ultra-high energies are expected to also produce very-high energy neutrinos via hadronic interactions within the source or its surrounding environment. Many of the candidate astrophysical source classes are either transient in nature or exhibit flaring activity. Using the Earth as a neutrino converter, suborbital and space-based optical Cherenkov detectors, such as EUSO-SPB2 and POEMMA, will be able to detect upward-moving extensive air showers induced by decay tau-leptons generated from cosmic tau neutrinos with energies ∼10 PeV and above. Both EUSO-SPB2 and POEMMA will be able to quickly repoint, enabling rapid response to astrophysical transient events. we calculate the transient sensitivity and sky coverage for both EUSO-SPB2 and POEMMA, accounting for constraints imposed by the Sun and the Moon on the observation time. We also calculate both detectors\u27 neutrino horizons for a variety of modeled astrophysical neutrino fluences. We find that both EUSO-SPB2 and POEMMA will achieve transient sensitivities at the level of modeled neutrino fluences for nearby sources. We conclude with a discussion of the prospects of each mission detecting at least one transient event for various modeled astrophysical neutrino sources