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Search Results: 1 - 10 of 462032 matches for " A. Micheli "
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Kinship, family and social network
Micheli Giuseppe A.
Demographic Research , 2000,
Abstract: There is considerable overlap between Le Play's mid-eighteenth-century household model map and the regional TFR map of central-southern Europe in the 1980s. The author examines the overall structure of relationships involved in Le Play's typology and observes that both the stem-family and the unstable family area in the Southern Europe are marked by a small, close-knit network of strong ties, with kinship predominance. Vice versa, the social support hinges upon a network of kin in the stem-family area, upon an alliance among different kindred units in the unstable Mediterranean area. All this leads to formulating a hypothesis of a tri-partite model for Western European relationship models. How can we explain the relationship between family predominance as anthropological embedding and family collapse as demographic reaction? The author reconsiders this question in the light of Festinger's cognitive dissonance theory and Elder's 'principle of accentuation': different, regionally rooted, family and kinship patterns "react" in contact with an appropriate reagent, such as the macro-process of modernisation, generating different patterns of today's demographic behaviour.
A Single Atom Mirror for 1D Atomic Lattice Gases
A. Micheli,P. Zoller
Physics , 2005, DOI: 10.1103/PhysRevA.73.043613
Abstract: We propose a scheme utilizing quantum interference to control the transport of atoms in a 1D optical lattice by a single impurity atom. The two internal state of the impurity represent a spin-1/2 (qubit), which in one spin state is perfectly transparent to the lattice gas, and in the other spin state acts as a single atom mirror, confining the lattice gas. This allows to ``amplify'' the state of the qubit, and provides a single-shot quantum non-demolition measurement of the state of the qubit. We derive exact analytical expression for the scattering of a single atom by the impurity, and give approximate expressions for the dynamics a gas of many interacting bosonic of fermionic atoms.
Prostitución, entre lo imposible y lo prohibido: El cuerpo peligroso de las mujeres
Fernández Micheli,Silvia A.;
Mora (Buenos Aires) , 2009,
Abstract: one particular case, denial of medical assistance to a prostitute in the department of soriano, uruguay, leads to reflection upon domination practices on the part of states, sanitary entities, medical doctors, as well the historical devaluation of women's work in general and the devaluation of sexual work in particular, resolved in a form of violence manifesting the permanent inequality existing between genders. this issue intend to point at the reporting and appealing to the justice system are not yet viable options in our patriarchal societies, among other reasons because assymnetrical and unequal relations between men and women are strengthened by myths and shared popular beliefs which are socially legitimised; they are viewed as 'normal', they 'become natural', they are embedded in families, in communities, and in society as a whole, and they leave scars marking daily life for men and women. violence against women thus takes on a public dimension, it spills out of private environment and is structurally embedded in society. it arises in multiple forms, it is silent, invisible, and it is nurtured through rough treatment, verbal aggression, discrimination, exclusion and poverty.
Prostitución, entre lo imposible y lo prohibido: El cuerpo peligroso de las mujeres
Silvia A. Fernández Micheli
Mora (Buenos Aires) , 2009,
Abstract: Un caso particular, negar la asistencia médica a una prostituta del Departamento de Soriano, en Uruguay, lleva a una reflexión sobre las prácticas de dominación, por parte de los Estados, de las instituciones sanitarias, de los médicos, así como permite plantear cuestiones acerca de la desvalorización histórica del trabajo de las mujeres, en general, y la desvalorización del trabajo sexual, en particular. El resultado se verifica en una forma de violencia que manifiesta la permanente desigualdad que existe entre los sexos. El trabajo pretende mostrar que la denuncia y la apelación a la justicia como caminos no están aún habilitados en la sociedad patriarcal, entre otras cosas, porque las relaciones asimétricas y de inequidad entre varones y mujeres se ven reforzadas por mitos y creencias popularmente compartidas, que se construyen y se legitiman socialmente. Las prácticas discriminatorias se ven como "normales", se "naturalizan", se enquistan en las familias, en las comunidades y en las sociedades como un todo, y dejan cicatrices que marcan la vida cotidiana de varones y mujeres. La violencia contra las mujeres adquiere así una dimensión pública, trasciende el ámbito privado y se instala estructuralmente en la sociedad. Surge de múltiples formas: es silenciosa, invisible y se sostiene a través de los malos tratos, las agresiones verbales, las discriminaciones, las exclusiones y la pobreza. One particular case, denial of medical assistance to a prostitute in the Department of Soriano, Uruguay, leads to reflection upon domination practices on the part of States, sanitary entities, medical doctors, as well the historical devaluation of women's work in general and the devaluation of sexual work in particular, resolved in a form of violence manifesting the permanent inequality existing between genders. This issue intend to point at the reporting and appealing to the justice system are not yet viable options in our patriarchal societies, among other reasons because assymnetrical and unequal relations between men and women are strengthened by myths and shared popular beliefs which are socially legitimised; they are viewed as 'normal', they 'become natural', they are embedded in families, in communities, and in society as a whole, and they leave scars marking daily life for men and women. Violence against women thus takes on a public dimension, it spills out of private environment and is structurally embedded in society. It arises in multiple forms, it is silent, invisible, and it is nurtured through rough treatment, verbal aggression, discrimination, exclusion
A toolbox for lattice spin models with polar molecules
A. Micheli,G. K. Brennen,P. Zoller
Physics , 2005, DOI: 10.1038/nphys287
Abstract: There is growing interest to investigate states of matter with topological order, which support excitations in the form of anyons, and which underly topological quantum computing. Examples of such systems include lattice spin models in two dimensions. Here we show that relevant Hamiltonians can be systematically engineered with polar molecules stored in optical lattices, where the spin is represented by a single electron outside a closed shell of a heteronuclear molecule in its rotational ground state. Combining microwave excitation with the dipole-dipole interactions and spin-rotation couplings allows us to build a complete toolbox for effective two-spin interactions with designable range and spatial anisotropy, and with coupling strengths significantly larger than relevant decoherence rates. As an illustration we discuss two models: a 2D square lattice with an energy gap providing for protected quantum memory, and another on stacked triangular lattices leading to topological quantum computing.
Unified Scheme for Describing Time Delay and Time Advance in the Interpolation of Rotational Bands of Resonances
E. De Micheli,G. A. Viano
Physics , 2003, DOI: 10.1103/PhysRevC.68.064606
Abstract: In this paper we show how rotational bands of resonances can be described by using trajectories of poles of the scattering amplitude in the complex angular momentum plane: each band of resonances is represented by the evolution of a single pole lying in the first quadrant of the plane. The main result of the paper consists in showing that also the antiresonances (or echoes) can be described by trajectories of the scattering amplitude poles, instead of using the hard-sphere potential scattering as prescribed by the classical Breit-Wigner theory. The antiresonance poles lie in the fourth quadrant of the complex angular momentum plane, and are associated with non-local potentials which take into account the exchange forces; it derives a clear-cut separation between resonance and antiresonance poles. The evolution of these latter poles describes the passage from quantum to semi-classical physics. The theory is tested on the rotational band produced by $\alpha$-$\alpha$ elastic scattering and on the hadronic rotational bands in $\pi^+$-p elastic scattering.
Mitigation of Human Exposure to Electromagnetic Fields Using Carbon Foam and Carbon Nanotubes  [PDF]
Davide Micheli, Mario Marchetti
Engineering (ENG) , 2012, DOI: 10.4236/eng.2012.412A118
Abstract:

In recent years there has been increasing concern about the possible consequences on human health from exposure to RF fields produced by wireless telecommunication technologies. In this work the coupling between carbon foam and composite materials made of carbon nanotubes and epoxy-resin allows to build a material able to absorb the electromagnetic field thus reducing its intensity in the environment where the mitigation of electromagnetic field is required. The Frequency range considered is 2 GHz - 3 GHz which is the most common frequency band used in wireless network and microwave oven too. Two different kind of heterogeneous materials are designed, one is a layered radar absorbing material made exclusively of epoxy resin and carbon nanotube in different weight percentage, the others are porous carbon foam where the pores are supposed be filled with carbon nanotubes and epoxy-resin. Both type of materials show interesting absorption properties reaching peak of reflection coefficient between –15 dB and –45 dB for a normally incident plane wave.

Aspectos eléctricos de la asociación de miocardio inactivable y bloqueos tronculares de grado intermedio
de Micheli, A;Aranda, A;Medrano, Gustavo A;
Archivos de cardiología de México , 2007,
Abstract: the electrical manifestation of dead myocardium associated to incomplete bundle branch block, i.e., with a limited <> phenomenon, are exposed. our description is based on previous experimental studies and validated by electro-anatomical comparisons. in previous experimental reports, the electrical manifestations of dead myocardium in the presence of varying degrees of associated block have also been described. the main electrocardiographic changes are related to the location and extent of damaged region and to degree of bundle branch block. if a left bundle branch block coexists with dead myocardium, small q waves are registered in left unipolar leads exploring the damaged area. in these leads, the signs of subepicardial or transmural injury are increased. when a right proximal block coexists, the main changes concern the morphologies registered in the unipolar right epicardial and precordial leads. the electrical changes are due to the spatial orientation of the electromotive forces of ventricular depolarization and repolarization. the electrocardiographic changes described here can be satisfactorily understood in the light of the present knowledge on the ventricular electrical phenomenon.
Manifestaciones eléctricas de alteraciones miocárdicas asociadas a preexcitación ventricular
de Micheli, A;Iturralde, P;Medrano, Gustavo A;
Archivos de cardiología de México , 2006,
Abstract: electro-vectorcardiographic curves, corresponding some heart diseases, must be analyzed in the light of the ventricular depolarization sequence, as well as on the heart's position and rotation. a more than 30-msec interval between the end of the initial slurring (delta) and the vertex of the r wave in the left unipolar leads or the main axis of the vectorcardiographic ventricular curves, allows us to infer the coexistence of left ventricular hypertrophy. on the other hand, segmental irregularities or distorsions of the electric curves suggest the presence of a limited myocardial zone unable to be activated. extensive or multiple deformations of these curves are more suggestive of a diffuse myocardial damage. sometimes signs of preexcitation, due to a pharmacological action, can also appear.
Dynamical crystal creation with polar molecules or Rydberg atoms in optical lattices
J. Schachenmayer,I. Lesanovsky,A. Micheli,A. J. Daley
Physics , 2010, DOI: 10.1088/1367-2630/12/10/103044
Abstract: We investigate the dynamical formation of crystalline states with systems of polar molecules or Rydberg atoms loaded into a deep optical lattice. External fields in these systems can be used to couple the atoms or molecules between two internal states: one that is weakly interacting and one that exhibits a strong dipole-dipole interaction. By appropriate time variation of the external fields, we show that it is possible to produce crystalline states of the strongly interacting states with high filling fractions chosen via the parameters of the coupling. We study the coherent dynamics of this process in one dimension (1D) using a modified form of the time-evolving block decimation (TEBD) algorithm, and obtain crystalline states for system sizes and parameters corresponding to realistic experimental configurations. For polar molecules these crystalline states will be long-lived, assisting in a characterization of the state via the measurement of correlation functions. We also show that as the coupling strength increases in the model, the crystalline order is broken. This is characterized in 1D by a change in density-density correlation functions, which decay to a constant in the crystalline regime, but show different regions of exponential and algebraic decay for larger coupling strengths.
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