RESUMENLas distintas movilidades que el turismo genera, construyen y deconstruyen los destinos turísticos que, como lugares de juego, compiten en el mercado de viajes para ser sustentables en el largo plazo. Cumpliendo este rol, los gestores de las políticas turísticas de los destinos en la mayoría de los casos se focalizan en generar condiciones para atraer inversiones a cualquier costo. Se genera así un nuevo tipo de movilidad, ya no de turistas, sino de personas que desean una mejor calidad de vida y encuentran distintos tipos de desarrolladores de sus anhelos. Este segundo tipo de movilidades produce lo que se denomina la sombra del turismo. El fenómeno de migración de amenidad puede ser interpretado entonces como una sombra, ya que las movilidades que produce son regresivas en términos de desarrollo local. Este artículo analiza cuatro casos de estudio en Argentina: San Martín de los Andes, Villa La Angostura, El Bolsón y Villa General Belgrano, con el objeto de contribuir a una mejor comprensión de los cambios que produce la migración de amenidad en centros turísticos de montaña. Se puede extraer que la principal amenaza que significa este proceso en términos de desarrollo local es su poder para ocultar la falta de competitividad del sector turístico en estos destinos.Palabras clave: Migración de amenidad, destinos turísticos de montaña, competitividad, desarrollo local. ABSTRACTTourism mobilities highlight that many different mobilities shape the places where tourism is performed and drive the making and unmaking of tourism destinations. As sites of play, tourism destinations compete in travel market to be sustainable in the long term. Playing this role, managers of tourism destinations in most cases misunderstand it as a simple generator of attracting conditions for a new kind of mobility of people with dreams for a better quality of life and a£"set of developers interested in making their dreams real". This second kind of mobilities produces "the shadow of tourism". Thus, amenity migration is viewed as a shadow because the kind of mobilities it caused could be interpreted as regressive in terms of local development. This paper analyze four cases of study: San Martín de los Andes, Villa La Angostura, El Bolsón and Villa General Belgrano in Argentina to better understand the kind of changes amenity migration produce. The principal threat that amenity migration means in terms of local development is its power to hide the lack of competitiveness of tourism sector in mountain destinations.

No abstract

This chapter identifies the characteristics and consequences of amenity migration in San Martín de los Andes, Argentina. It also assesses the importance and historical continuities of its development in this mountain tourist destination in Patagonia. It is confirmed that the city of San Martín de los Andes is being significantly affected by amenity-seeking residents, due mainly to its strong attraction as a mountain tourist centre and its amenity attributes per se. Amenity migrants and others are over-extending urban services and housing, creating employment problems and negatively impacting social relationships. Yet, the amenity migrants also have positive influences, particularly generating some types of income, investment capital and positive social values and behaviour, such as a heightened awareness of nature and the need to sustain it.

This paper presents a review of largely our own work on the DNA melting transition, and some new measurements of the elastic energy of sharp bends in single-stranded DNA and RNA. The purpose is to present the point of view that studying the transition of intermediate size oligomers leads to valuable tests of the models, in particular the ingredients most important for a reduced-degrees-of-freedom description, such as the different role of base pairing and base stacking. We make the case that, with intermediate size oligomers, one can actually measure the bubble length, which exhibits a more interesting behavior than the fraction of dissociated bases alone. Here is where more work seems necessary, both on the experimental and the modeling side, to understand the differences between theory and experiments. We summarize our previous results on the cooperativity parameters, which suggest that the transition is never exactly two-state no matter how short the molecule, or in other words the nucleation size for bubbles opening at the ends of the molecule is essentially 1 base pair. We briefly discuss our own modification of the nearest-neighbor model which treats pairing and stacking separately, as a way to fit the experimental melting profiles in this intermediate length regime. Finally we go on to present some new measurements on the stability of DNA and RNA hairpins with very short loops.

El sector agropecuario-silvícola ha demostrado un dinamismo positivo en las últimas décadas tanto en volumen, producción como en la diversificación de exportaciones y en el producto interno bruto (PIB). Existen, a pesar de los resultados globales nacionales, otras opiniones que estiman necesario darle atención a la desagregación del sector agropecuario-silvícola a niveles regionales y subsectoriales en su característica de producción primaria. Se plantea la afirmación de que la participación subsectorial y regional es decreciente en agricultura y que el crecimiento del sector aumenta su concentración y participación en algunas regiones del centro del país. En el estudio se concluye que actualmente los subsectores agricultura (cultivos), silvicultura, ganadería y fruticultura participan en un 16%, 18%, 24,8% y 40,7% respectivamente en el valor agregado del sector. Esto revela una disminución de la participación del subsector agricultura sobre la base de este parámetro. Respecto de las regiones, las que crecen a mayor veloci