4,325 research outputs found

    On the Geometry of Sculpting-like Gauging Processes

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    Recently, a new gauging procedure called Sculpting mechanism was proposed to obtain the M-theory origin of type II gauged Supergravity theories in 9D. We study this procedurein detail and give a better understanding of the different deformations and changes in fiber bundles, that are able to generate new relevant physical gauge symmetries in the theory. We discuss the geometry involved in the standard approach (Noether-like) and in the new Scultping-like one and comment on possible new applications.Comment: 9 pages, latex, Notation and typos reviewed, more clear explanations, results unchange

    Larval trematodes infecting the South-American intertidal mud snail Heleobia australis (Rissooidea: Cochliopidae)

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    Larval trematodes infecting the snail Heleobia australis (Cochliopidae) from the Bahía Blanca estuary, Argentina were surveyed for two years. A total of 7,504 snail specimens was dissected and the larval stages of 15 different trematodes were recovered and examined morphologically. These larvae included four species that had previously been reported from H. australis in Brazil, Uruguay, and Argentina: the heterophyid Ascocotyle (Phagicola) longa and the microphallids, Maritrema bonaerense, Maritrema orensense, and Microphallus simillimus. Three other species, the echinostomatid Stephanoprora uruguayensis, the microphallid Levinseniella cruzi, and the psilostomid Psilochasmus oxyurus are reported here for the first time as parasites of H. australis. Eight other trematodes found in H. australis are described and placed in the appropriate superfamilies, families or genera (Cryptogonimidae, Apocreadiidae, Aporocotylidae, Notocotylidae, Haploporidae, Renicolidae, Himasthla, and Renicola). The prevalence of the trematode taxa infecting H. australis in the Bahía Blanca estuary was low (20%). Microphallidae were the richest and the most prevalent family, probably because of the high abundance of crabs — the second-intermediate hosts of certain microphallid species — and the considerable diversity of gulls. Here we compare the parasite assemblage found in the H. australis from Bahía Blanca estuary with other parasite assemblages infecting Heleobia spp. and other rissooids from the rest of the world.Fil: Alda, Maria del Pilar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Estudios Parasitológicos y de Vectores. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Estudios Parasitológicos y de Vectores; ArgentinaFil: Martorelli, Sergio Roberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Estudios Parasitológicos y de Vectores. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Estudios Parasitológicos y de Vectores; Argentin

    ¿The gastronomic tourism an opportunity for the local development in Catalonia?: An analysis from the stakeholders involved

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    The development of tourism and particularly public administration have had to adapt to new trends and the demands of the tourist market (Fayos-Solá, 2004) especially in Spain, thus generating some of the most remarkable and structural changes which constitute the emergence of new touristic dynamics (Lopez Palomeque and X. Font, 2010). The Catalan territory, which has participated in those dynamics where wine tourism becomes an alternative product of the diversification of touristic offerings, traditionally focused on sun-and-beach not only in this region but also in the whole of Spain. To revitalize the touristic offer historically focused on sun and Beach tourism, the Catalan government , bet for the gastronomic tourism through the creation of the strategies as the Gastronomic Club in 2001 or the Gastroteca in 2006; which link different stakeholders not only publics but also privates (travel agencies, universities, private foundation, NGO, producers, etc) interested in gastronomy, responding to this phenomenon that is increasing around the world and specially in Catalonia thanks to important figures like one of the most well known chefs around the world which is Ferran Adrià. Catalonia as a region is particularly varied, no only because it’s characteristics biogeographically but also for its touristic resources, generating in this territory the production of a set of “micro territories†which are constantly looking for authenticity and differentiation from highly competitive tourism brands such as the city of Barcelona. This paper analyzes the advantages and disadvantages which arise this new touristic phenomenon in Catalonia and its relationship with the local development in different scales; through the perceptions and actions carried out for the stakeholders involved in this strategy. To achieve this, was taken the reflexions and the relationships that keep between them, 12 personalities from the public and private sector and the academy. Were applied semi structured interviews and them perceptions were systematized and analyzed using SWOT (Strengths, Weaknesses, Opportunities, Threats) methodology as the primary tool. This methodology, examines this phenomenon in Catalonia and its possibilities as a generator of local and regional development. Key words: Gastronomic tourism, local development, stakeholders, Catalonia.

    Improved water supply in the Ghanaian Volta Basin: who uses it and who participates in community decision-making?

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    "We examine access to, use of, and participation in decisions on improved water supply in the Volta basin of Ghana, one of the first countries to introduce a community-based approach to rural water supply on a large scale. While 71 percent of the households interviewed have access to improved water, 43 percent of these continue to use unsafe sources as their main domestic water source. Our results indicate that quality perceptions and opportunity costs play an important role in households' choice of water source. The effect of prices and income levels on this choice differs according to the pricing system used. Given that supply characteristics such as the location and pricing system affect household decisions to use the improved source, households may try to influence these characteristics in their favor during the community decision-making process for the improved source. However, less than 40 percent of the households interviewed participated in decisions on location or technology. We argue that the decision whether to participate depends on three main factors: (i) the household's bargaining power, (ii) the potential benefits from influencing outcomes, and (iii) the cost of participation, (mainly opportunity cost of time). Our results indicate that bargaining power matters more than potential benefits. Moreover, we find an extremes effect: the poorest, uneducated and the richest, highly educated segments of the community are more likely to participate in decision-making for improved domestic water supply than the middle class. We conclude with policy implications and needs for further research." Authors' AbstractWater resource allocation, Community participation, Community-based resource management,

    A LITERATURE REVIEW ON THE CURRENT STATE OF SECURITY AND PRIVACY OF MEDICAL DEVICES AND SENSORS WITH BLUETOOTH LOW ENERGY

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    Technology use in healthcare is an integral part of diagnosis and treatment. The use of technology in medical devices and sensors is growing. These devices include implantable medical devices, and consumer health and fitness tracking devices and applications. Bluetooth Low Energy (BLE) is the most commonly used communication method in medical devices and sensors. Security and privacy are important, especially in healthcare technologies that can impact morbidity. There is an increasing need to evaluate the security and privacy of healthcare technology, especially with devices and sensors that use Bluetooth Low Energy due to the increasing prevalence and use of medical devices and sensors. Therefore, more robust security analysis is needed to evaluate security and privacy aspects of medical devices and sensors that use Bluetooth Low Energy

    El cambio climático y el advenimiento de una cultura kantiana: estructura y dinámica del Sistema Internacional

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    Este artículo se concentra en el incremento de la gravitación de los actores no tradicionales en lo a relativo a la problemática del cambio climático. En este sentido, el estudio se preocupa por actores y problemáticas que marcan algunos de los cambios más significativos en la estructura y dinámica del sistema internacional. Se ordena en dos partes, la primera de ellas realiza una propuesta teórica de tipo constructivista y la segunda estudia la acción de los actores no tradicionales en términos climáticos, tanto a la luz del sistema de conferencias formales como a través de otras formas que estos construyen. En consecuencia, se afirma que: a) existe una suerte de transformaciones en el sistema internacional propiciadas por los actores no tradicionales; b) el proceso de construcción social del poder llevado adelante por los actores no tradicionales tiende a institucionalizarse, y c) las transformaciones en la arquitectura climática global muestran el advenimiento de una cultura kantiana global.This article focuses on the emergence of nontraditional actors in climate change issues. Therefore, the study is concerned about actors and issues that demonstrate some of the most significant changes occurred in the structure and dynamics of the international system. It is divided into two parts. The first one present the constructivist approach which is the theoretical proposal selected on this analysis. The second refers to the action of non-traditional actors in terms of climate change, both in the formal conference system and through other ways that they constructed. Afterward it is argued that: a) there is a kind of transformations in the international system favored by nontraditional actors b) the process of social construction of power carried out by non-traditional players tends to be institutionalized, and c) the changes in the global climate architecture show the emergence of a global Kantian culture.Fil: Bueno, Maria del Pilar. Universidad Nacional de La Plata; Argentina. Universidad Nacional de Rosario; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin

    Taphonomy in the kitchen: culinary practices and processing residues of native tuberous plants of the south-central Andes

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    Presentamos material comparativo para la identificación de residuos culinarios de tubérculos cocidos de Solanum sp., Oxalis tuberosa y Ullucus tuberosus. Partimos de un concepto amplio de tafonomía que incluye el estudio de las modificaciones de las plantas resultantes de la preparación de alimentos; en este caso, aquellas que se deben al hervido y cocción al rescoldo de tubérculos frescos. Realizamos experimentos de cocción controlados y comparamos los resultados con muestras frescas. Describimos las modificaciones en los atributos morfológicos y ópticos de tejidos y partículas intracelulares resultantes de nuestros experimentos de cocción. Finalmente, discutimos la posibilidad de reconocer las técnicas de cocción a partir del análisis microscópico de vestigios de tubérculos.We present comparative material for the identification of culinary residues of cooked tubers of Solanum sp., Oxalis tuberosa and Ullucus tuberosus. We use a broad concept of taphonomy that includes the study of plant modifications resulting from the preparation of food, in this case the boiling and cooking al rescoldo of fresh tubers. We undertake a number of controlled cooking experiments and compare the results with fresh samples. We discuss morphological and optical modifications of tissue fragments and intracellular particles resulting from our cooking experiments. Finally, we discuss the possibility of recognizing cooking techniques from microscopic analysis of tuber remains.Fil: Babot, Maria del Pilar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucuman. Instituto Superior de Estudios Sociales. Universidad Nacional de Tucuman. Instituto Superior de Estudios Sociales; ArgentinaFil: Lund, Julia. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Instituto de Arqueología y Museo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Olmos, Adriana Valeria. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Instituto de Arqueología y Museo; Argentin
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