379 research outputs found
Diversities in Diversity: Exploring Moroccan Migrants’ Livelihood in Genoa
It is a largely accepted idea that complexity and recent global phenomena have generated a multi-layered diversification process in Western societies. Migration phenomena are largely responsible for this process both in receiving European societies as well as in original sending countries. Migration has been and continues to be a ubiquitous human experience. Yet, while this fact has aided the understanding of the world as something other than a mosaic of distinct cultural spaces with clearly demarcated borders, it has not decreased the incomprehension, fear and suspicion with which non–European migrants are often greeted within the industrialised cities of Europe. This article deals with one aspect of this process that seems to be quite underestimated in media, public opinion and academia. It is the idea that “ethnicity” can be approached, explored and investigated as a heterogeneous and multi-faced form of diversity itself. This is what can be defined as “diversities within diversity”. Departing from the presentation of an empirical research in Genoa it will be possible to analyse these phenomena at two different levels: namely, in terms of methods and methodology. By focusing on the idea of livelihood and employing an approach based on “Tracing” techniques, different ways of acting and being Moroccan migrants in Genoa will be revealed, presented and discussed. This method newly integrates both quantitative and qualitative information. It will allow us to analyse the experience of livelihood in a way that will reveal the simultaneous existence of many underlying different invisible and unconscious social constructions as well as visible concrete and conscious expressions of everyday life. Disclosing how the same people in the same local context produce different “adaptive” strategies and lifestyles will lead to outline a potential conceptual methodological framework of reference based on an open/close principle. In this case ideas of openness and closeness will be assumed in a dialectical double-faced process. It is not only a matter of how systems can be defined open or closed by themselves, but also how the encounter and interplay of many different systems – generation of diversity - establish the conditions and limits within which different individuals can reproduce their culture as social actors- production of diversities. After having discussed the methodological implications of this approach it will be possible to draw some final theoretical considerations. If we believe that new ways of investigating social phenomena are a determinant in the way we describe, analyze, explain and understand their complexity, we should recognize that not only theory might generate and define what we call social reality but also vice-versa. Approaching the world out there in new ways might result in rethinking and adjusting the conceptual taxonomies that drive social scholars in their search for gaining and catching social reality. This principle becomes crucial if we want social sciences to be heuristically oriented, in other words if we want to develop the capacity to hand back positive analytical readings and comparisons of social phenomena as well as useful recommendations for policy makers.Migration, Italy, Morocco, Methodology, Tracing, Open/close Model
Conversion of K-Rb mixtures into stable molecules
We study the conversion of K and Rb atoms into stable molecules
through the stimulated Raman adiabatic passage (STIRAP) in photoassociation
assisted with Feshbach resonance. Starting with the mean-field Langrange
density, we show that the atom-to-molecule conversion efficiency by STIRAP
aided by Feshbach resonance is much larger than that by bare Feshbach
resonance. We also study the influence of the population imbalance on the
atom-to-molecule conversion.Comment: Revtex, 5 pages, 3 figures; version to appear in PRA (some content
changed
Creating stable molecular condensate using a generalized Raman adiabatic passage scheme
We study the Feshbach resonance assisted stimulated adiabatic passage of an
effective coupling field for creating stable molecules from atomic Bose
condensate. By exploring the properties of the coherent population trapping
state, we show that, contrary to the previous belief, mean-field shifts need
not to limit the conversion efficiency as long as one chooses an adiabatic
passage route that compensates the collision mean-field phase shifts and avoids
the dynamical unstable regime.Comment: 4+\epsilon pages, 3 figure
Diversities in Diversity: Exploring Moroccan Migrants' Livelihood in Genoa
It is a largely accepted idea that complexity and recent global phenomena have generated a multi-layered diversification process in Western societies. Migration phenomena are largely responsible for this process both in receiving European societies as well as in original sending countries. Migration has been and continues to be a ubiquitous human experience. Yet, while this fact has aided the understanding of the world as something other than a mosaic of distinct cultural spaces with clearly demarcated borders, it has not decreased the incomprehension, fear and suspicion with which non European migrants are often greeted within the industrialised cities of Europe. This article deals with one aspect of this process that seems to be quite underestimated in media, public opinion and academia. It is the idea that ethnicity can be approached, explored and investigated as a heterogeneous and multi-faced form of diversity itself. This is what can be defined as diversities within diversity . Departing from the presentation of an empirical research in Genoa it will be possible to analyse these phenomena at two different levels: namely, in terms of methods and methodology. By focusing on the idea of livelihood and employing an approach based on Tracing techniques, different ways of acting and being Moroccan migrants in Genoa will be revealed, presented and discussed. This method newly integrates both quantitative and qualitative information. It will allow us to analyse the experience of livelihood in a way that will reveal the simultaneous existence of many underlying different invisible and unconscious social constructions as well as visible concrete and conscious expressions of everyday life. Disclosing how the same people in the same local context produce different adaptive strategies and lifestyles will lead to outline a potential conceptual methodological framework of reference based on an open/close principle. In this case ideas of openness and closeness will be assumed in a dialectical double-faced process. It is not only a matter of how systems can be defined open or closed by themselves, but also how the encounter and interplay of many different systems generation of diversity - establish the conditions and limits within which different individuals can reproduce their culture as social actors- production of diversities. After having discussed the methodological implications of this approach it will be possible to draw some final theoretical considerations. If we believe that new ways of investigating social phenomena are a determinant in the way we describe, analyze, explain and understand their complexity, we should recognize that not only theory might generate and define what we call social reality but also vice-versa. Approaching the world out there in new ways might result in rethinking and adjusting the conceptual taxonomies that drive social scholars in their search for gaining and catching social reality. This principle becomes crucial if we want social sciences to be heuristically oriented, in other words if we want to develop the capacity to hand back positive analytical readings and comparisons of social phenomena as well as useful recommendations for policy makers
Nuclear halo and the coherent nuclear interaction
The unusual structure of Li11, the first halo nucleus found, is analyzed by
the Preparata model of nuclear structure. By applying Coherent Nucleus Theory,
we obtain an interaction potential for the halo-neutrons that rightly
reproduces the fundamental state of the system.Comment: 9 pages Submitted to International Journal of Modern Physics E
(IJMPE
Coupling methods for non-matching meshes through distributed Lagrange multipliers
Nature and engineering commonly present multi-physics problems, i.e., complex systems involving a number of mutually interacting subsystems that can be modelled by (non linearly coupled) Partial Differential Equations (PDEs).
As a tool to numerically model such problems, we study the fictitious domain method with Lagrange multipliers. After introducing an example model problem, a constrained Poisson equation, where the constraint is applied either to a codimension one domain or to a codimension zero domain, we deal with the technical problems related to the implementation of the coupled system, with a focus on the computation of coupling matrices, and the numerical coupling between arbitrarily distributed non-matching meshes. To conclude, we use the fictitious domain method to study composites materials, in particular fiber reinforced materials. After introducing the necessary tools of continuum mechanics and differential geometry, we develop a full three-dimensional model, where the effect of the fibers is imposed through a distributed Lagrange multiplier approach. We study our model using inf-sup conditions from Mixed Finite Elements, and derive a one-dimensional model where the coupling is achieved introducing some additional modellistic hypotheses
Coherent population trapping in two-electron three-level systems with aligned spins
The possibility of coherent population trapping in two electron states with
aligned spins (ortho-system) is evidenced. From the analysis of a three-level
atomic system containing two electrons, and driven by the two laser fields
needed for coherent population trapping, a conceptually new kind of
two-electron dark state appears. The properties of this trapping are studied
and are physically interpreted in terms of a dark hole, instead of a dark
two-electron state. This technique, among many other applications, offers the
possibility of measuring, with subnatural resolution, some superposition-state
matrix-elements of the electron-electron correlation that due to their time
dependent nature are inaccesible by standard measuring procedures.Comment: 10 pages and 4 figure
The camera tends to lie and the audience tends to believe”. Some implications of the use of film in ethnographic research: the case of the European research project TRESEGY
This paper discuss issues related to the use of film in social science research. A documentary made within
TRESEGY, a three year EU-funded research project, is the basis of this paper. TRESEGY focused on the experiences
of inclusion and exclusion in the public sphere among second generation migrated European teenagers. The
final documentary was made by two film crews from two different universities that divided among themselves
nine European cities where filming took place. Issues of the negotiation of meaning involved in the different
stages of film-making, between a) the researchers consortium and the filmmakers b) the youths filmed and the
filmmakers/researchers from each terrain are discussed.O artigo trabalha questões relacionadas com o uso do filme na investigação em ciências sociais.
Um documentário feito no âmbito do projecto TRESEGY, projecto financiado pela EU, é a base deste artigo.
TRESEGY focalizou questões de inclusão e exclusão na esfera pública de jovens europeus de ascendência
imigrante. O documentário final foi realizado por duas equipas diferentes de duas universidades diferentes que
dividiram entre si as nove cidades a filmar. São apresentadas e discutidas questões de negociação de sentido
envolvidas nos vários estádios da produção entre a) consórcio de investigadores e realizadores e b) entre os jovens filmados e os investigadores de cada terreno/cidade.info:eu-repo/semantics/publishedVersio
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