El turismo rural en Las Palmas de Gran Canaria

El conferenciante expuso el desarrollo y la situación actual del turismo rural en la Isla de Gran Canaria, comenzando por sus orígenes, muy recientes al ser un destino conocido y deseado por sus características de sol y playa. Los comienzos fueron difíciles, tanto por la demanda que ignoraba el interior de la isla, como por los propios oferentes, nada preparados como emprendedores de esta tipología turística. De hecho fueron los peninsulares, menos propensos a los atractivos litorales, los primeros que se interesaron por el interior. Después de una primera fase apoyada por la apertura de oficinas de información en el interior y de las acciones de las figuras europeas de los Leader y los Prodes, cuando la propia administración se interesó por regular esta actividad en sus diferentes aspectos. Consecuencia de ello es el crecimiento de esta actividad hasta los momentos actuales cuya problemática principal se centra en los temas de su propia sostenibilidad y que se propone un crecimiento selectivo.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Una nueva edición de un clásico de la Psicología del Deporte

Obra ressenyada: R. S. WEINBERG y D. GOULD, Fundamentos de Psicología del deporte y del ejercicio físico. (4º ed

Synergies between R&D and exporting strategies and the impact of the financial and economic crises

The positive effects of export and R&D strategies upon productivity, firm profits, economic growth or innovation have been extensively studied in the economics literature (Bernard and Jensen, 1999; Greenaway and Kneller, 2007; Wagner, 2007; Girma, Görg and Strobl, 2004; Becheikh, Landry and Amara, 2006; Greenaway and Kneller, 2004). Moreover, a positive correlation between the two strategies has also been found in some studies, suggesting positive synergies if jointly adopted (Golovko and Valentini, 2011; Aw, Roberts and Winston, 2007). Therefore, adopting both strategies should be one of the priority goals for any firm. However, very little is known about the adoption dynamics behind the achievement of this target. Sunk costs, learning effects and likely decreasing marginal performance associated with diseconomies of scope from simultaneous adoption, would make it rational for any strategy to be adopted at different points in time rather than simultaneously (Battisti, Colombo and Rabbiosi, 2015; Astebro, Battisti and Colombo, 2016). Nevertheless, to the best of my knowledge, no study has looked to the most likely adoption path and to their drivers. Literature is also limited on the impact that liquidity and demand conditions, associated to both the financial and the economic crisis that started in 2008, may have had upon export and R&D adoption decisions and the depth of their adoption. To address these research gaps I studied a sample of Spanish manufacturing firms from the period 2000-2014. Interestingly, to the study, the sample covers an entire business cycle as well as the 2008 world financial and economic crisis. Drawing upon the econometric analysis, I provide new insight into the research field through three separate contributions. In the first Chapter, I examine whether sequential is more likely than simultaneous adoption for export and R&D and also whether the sequential adoption order matters. I also investigate the crisis effects upon this sequentiality. In the second Chapter, I analyse the factors that have driven the adoption of these strategies during the crisis, disentangling the effects of the dropping demand and credit crunch. Finally, in Chapter three, to observe the whole picture about the consequences of the crisis upon export and R&D strategies, I extend the analysis started in Chapter 1 to the intensive margin. Findings from these three chapters shed light on the relationship between export and R&D with important industrial policy implications. Keywords: export, R&D, sequential adoption, simultaneous adoption, asymmetry, crisis, intensity, credit crunch, deman

The supersonic flight of a blunt body in a disturbed atmosphere

Numerical analysis of free flow fields around axisymmetric blunt bodies in supersonic fligh

ATS-F radiant cooler contamination test in a hydrazine thruster exhaust

A test was conducted under simulated space conditions to determine the potential thermal degradation of the ATS-F radiant cooler from any contaminants generated by a 0.44-N(0.1-lbf) hydrazine thruster. The radiant cooler, a 0.44-N(0.1-lbf)hydrazine engine, and an aluminum plate simulating the satellite interface were assembled to simulate their flight configuration. The cooler was provided with platinum sensors for measuring temperature, and its surfaces were instrumented with six quartz crystal microbalance units (QCM) to measure contaminant mass deposits. The complete assembly was tested in the molecular sink vacuum facility (Molsink) at the Jet Propulsion Laboratory. This was the first time that a radiant cooler and a hydrazine engine were tested together in a very-high-vacuum space simulator, and this test was the first successful measurement of detectable deposits from hydrazine rocket engine plumes in a high vacuum. The engine was subjected to an accelerated duty cycle of 1 pulse/min, and after 2-hr of operation, the QCMs began to shift in frequency. The tests continued for several days and, although there was considerable activity in the QCMs, the cooler never experienced thermal degradation

Ultralean combustion in general aviation piston engines

The role of ultralean combustion in achieving fuel economy in general aviation piston engines was investigated. The aircraft internal combustion engine was reviewed with regard to general aviation requirements, engine thermodynamics and systems. Factors affecting fuel economy such as those connected with an ideal leanout to near the gasoline lean flammability limit (ultralean operation) were analyzed. A Lycoming T10-541E engine was tested in that program (both in the test cell and in flight). Test results indicate that hydrogen addition is not necessary to operate the engine ultralean. A 17 percent improvement in fuel economy was demonstrated in flight with the Beechcraft Duke B60 by simply leaning the engine at constant cruiser power and adjusting the ignition for best timing. No detonation was encountered, and a 25,000 ft ceiling was available. Engine roughness was shown to be the limiting factor in the leanout