Sostenibilidad de modos ancestrales de producción agrícola en el Perú : ¿conservar o sustituir?

Frente al éxito de algunos productos andinos como la quinua, la papa o la maca en el comercio agroalimentario internacional y ante la creciente degradación ambiental que afrontan los países en desarrollo producto de actividades de explotación intensiva; nuestra investigación busca evidenciar la tendencia que se asume desde la comunidad académica/científica y los funcionarios públicos del sector agroalimentario en el Perú, frente a la necesidad de mantener sostenible diversos modos ancestrales de producción agrícola (caso quinua), para ello analizamos información cuantitativa y cualitativa obtenida de las instituciones públicas y las universidades peruanas.

Sostenibilidad de modos ancestrales de producción agrícola en el Perú : ¿conservar o sustituir?

Frente al éxito de algunos productos andinos como la quinua, la papa o la maca en el comercio agroalimentario internacional y ante la creciente degradación ambiental que afrontan los países en desarrollo producto de actividades de explotación intensiva; nuestra investigación busca evidenciar la tendencia que se asume desde la comunidad académica/científica y los funcionarios públicos del sector agroalimentario en el Perú, frente a la necesidad de mantener sostenible diversos modos ancestrales de producción agrícola (caso quinua), para ello analizamos información cuantitativa y cualitativa obtenida de las instituciones públicas y las universidades peruanas.

Sostenibilidad de modos ancestrales de producción agrícola en el Perú : ¿conservar o sustituir?

Frente al éxito de algunos productos andinos como la quinua, la papa o la maca en el comercio agroalimentario internacional y ante la creciente degradación ambiental que afrontan los países en desarrollo producto de actividades de explotación intensiva; nuestra investigación busca evidenciar la tendencia que se asume desde la comunidad académica/científica y los funcionarios públicos del sector agroalimentario en el Perú, frente a la necesidad de mantener sostenible diversos modos ancestrales de producción agrícola (caso quinua), para ello analizamos información cuantitativa y cualitativa obtenida de las instituciones públicas y las universidades peruanas.

Ecuadorian migration and family strategies of social mobility: dialectic relation between emotional and financial capital

This text deals with transnational strategies of social mobility in Ecuadorian migrant households in Spain. We apply the capital accumulation model (Moser, 2009) for this purpose. The main target of this article is, beyond thinking in terms of capital stock and accumulation, the analysis in depth of the dynamics of the different types of capital, that is to say, how they interact with each other in the framework of the social mobility strategies of the migrants and their families. We are bringing into light the way some households adopt investing decisions in capitals that don't translate into any addition or earnings in all cases, on the contrary, concentrating all their efforts on the accumulation of a certain asset they may, in some cases, lead to a loss of another. We will concentrate our analysis primarily on the dynamics between the physical and financial capital and the social and emotional capital, showing the tensions produced between these two types of assets. At the same time, we will highlight how migrants negotiate their family strategies of social mobility in the transnational area. Our study is based in empirical material obtained from qualitative fieldwork (in-depth interviews) with families of migrants in the urban district of Turubamba Bajo -(south of Quito) and in Madrid. A series of households were selected where interviews were carried out in the country of origin as well as in the context of immigration, with different family members, analysing the transnational social and economic strategies of families of migrant members. Family members of migrants established in Spain were interviewed in Quito, as well as key informants in the district (school teachers, nursery members of the staff, etc.). The research was framed within the projects "Impact of migration on the development: gender and transnationalism", Ministry of Science and Innovation (SEJ2007/63179) (Laura Oso, dir. 2007-2010),"Gender, transnationalism and intergenerational strategies of social mobility", Ministry of Economy and Competitiveness (FEM2011/26210) (Laura Oso, dir. 201-1-2015) and “Gender, Crossed Mobilities and Transnational Dynamics”, Ministry of Economy and Competitiveness (FEM2015-67164).

Las edades de Hitler. De Satán a un ser de carne y hueso, y su representación en clave paródica

Adolf Hitler suscitó desde su entrada en la escena política alemana una fascinación perversa, un sentimiento que, con el tiempo, ha dado lugar a numerosas representaciones culturales sobre el Führer. La muestra, rica y variada tanto en el fondo como en la forma, nos permitirá trazar tres estadios en lo referente al proceso de construcción historiográfica del hitlerismo, iniciado con la caída del Tercer Reich. Estos responden en buena medida al devenir sociopolítico y cultural de la sociedad a escala global desde el final de la guerra y hasta nuestros días y pueden resumirse en tres: primero, la satanización; segundo, la humanización; tercero, el retrato caricaturesco. Proponemos un recorrido histórico por diversos productos culturales del dictador alemán cuyo propósito es desentrañar el retrato psicológico poliédrico que se ha construido en torno a la figura de Hitler.

Designing Massive Open Online Learning Processes: The importance of the social element

This is a pre-print for personal use only. Please refer to the Springer website for the official, published version http://www.springer.com/978-3-662-52923-2

A new construction of Calabi–Yau manifolds: Generalized CICYs

We present a generalization of the complete intersection in products of projective space (CICY) construction of Calabi–Yau manifolds. CICY three-folds and four-folds have been studied extensively in the physics literature. Their utility stems from the fact that they can be simply described in terms of a ‘configuration matrix’, a matrix of integers from which many of the details of the geometries can be easily extracted. The generalization we present is to allow negative integers in the configuration matrices which were previously taken to have positive semi-definite entries. This broadening of the complete intersection construction leads to a larger class of Calabi–Yau manifolds than that considered in previous work, which nevertheless enjoys much of the same degree of calculational control. These new Calabi–Yau manifolds are complete intersections in (not necessarily Fano) ambient spaces with an effective anticanonical class. We find examples with topology distinct from any that has appeared in the literature to date. The new manifolds thus obtained have many interesting features. For example, they can have smaller Hodge numbers than ordinary CICYs and lead to many examples with elliptic and K3-fibration structures relevant to F-theory and string dualities.

Assessing the conservation status of Mediterranean temporary ponds using biodiversity: a new tool for practitioners

The assessment of the habitat condition is the first step of conservation actions and several tools are available to assess wetlands. However, only a few tools are adapted to the priority habitat Mediterranean temporary ponds. Thus, our objectives were (i) to identify biological indicators associated with the different conservation status of Mediterranean tem- porary ponds and (ii) to create an efficient evaluation tool for non-experts using indicators of conservation status. A total of 87 ponds were sampled in southwest Portugal to assess the presence of plants, large branchiopods, amphibians, threatened voles and bats. Ponds with favourable conservation status showed higher species richness of plants, large branchiopods and amphibians. We identified eighteen indicators for favourable ponds: 15 plants, one large branchiopod and two amphibian taxa. We propose a new tool to assess the conservation status of Mediterranean tem- porary ponds based on the presence of these indicators. This tool is an alternative to other common, but time- consuming, methods and can be readily used by trained practitioners. The replication and adaptation of this tool to other regions and habitats enables the collection of comparable data and the geographical scaling-up of the assessments.

Spectral properties of resonant Bose-Fermi mixtures

The object of study of the present work are Bose-Fermi mixtures in three dimensions at zero temperature. The system is characterized by a great tunability of physical parameters that is achieved by means of a Fano-Feshbach resonance. As a result, there are mainly two regimes: we move from a situation in which bosons and fermions are weakly interacting to a context in which bosons are coupled to fermions so as to form molecules that are composite fermions, as the coupling between the two types of particles is increased. In the former case, we can describe the mixture as a weakly attractive Bose-Fermi one, while in the latter the same is described in terms of molecules and excess atoms or particles which are unpaired. The main aim of the thesis is to analyze the spectral weight functions which represent the single-particle excitation spectra of the system and are relevant to recent radio-frequency spectroscopy experiments of the system. In order to pursue this objective, diagrammatic methods are used. The formalism is developed within the T-matrix approach: it consists of an approximate calculation whichselects exclusively the class of Feynman’s diagrams that collects all possible repeated boson-fermion interaction.

Philosophy of quantum field theory: an introduction with interviews and comments

In this thesis, I address quantum theories and specifically quantum field theories in their interpretive aspects, with the aim of capturing some of the most controversial and challenging issues, also in relation to possible future developments of physics. To do so, I rely on and review some of the discussions carried on in philosophy of physics, highlighting methodologies and goals. This makes the thesis an introduction to these discussions. Based on these arguments, I built and conducted 7 face-to-face interviews with physics professors and an online survey (which received 88 responses from master's and PhD students and postdoctoral researchers in physics), with the aim of understanding how physicists make sense of concepts related to quantum theories and to find out what they can add to the discussion. Of the data collected, I report a qualitative analysis through three constructed themes.