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Search Results: 1 - 10 of 9320 matches for " Olga Lorenzo "
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Nostalgia, Shame and the Transplanted Cuban: "la cubana arrepentida"
Olga Lorenzo
PORTAL : Journal of Multidisciplinary International Studies , 2005,
Abstract: Literature can illuminate and extend our understanding of the affect of shame. In this paper, I will use extracts from my fictional works, published and in progress, and other fictional work and poetry by Cuban and Cuban-American exile writers to illustrate some aspects of shaming in relation to the experience of being a Cuban-American migrant in the United States, particularly relative to the sense of exilic nostalgia for the lost homeland. I will also look at how shame is used by the minority culture to control, erode or slow the process of assimilation and to try to maintain the illusion of the superiority of the minority culture.
Valoración del programa "enfermería de urgencia", licenciatura en enfermería
Lorenzo Nieves,Yamis; Cabrera Sánchez,Yamileidys; Mirelis Hernández,Olga M; Romero López,Adalina;
Revista de Ciencias M??dicas de Pinar del R?-o , 2007,
Abstract: the curricular design in the medical science professions is one of the most debated theoretic and practical field nowadays. the aim is to design study plans which lead to the formation of a graduate consistent with the expectations of society according to its health requirements ,so we made an evaluation of the nursing emergency program bearing in mind all the following didactic categories: problem, objective , methods , aids and valuation. the program is considered tributary to the formation of the graduate.
Estimation of Relative Permittivity of Shallow Soils by Using the Ground Penetrating Radar Response from Different Buried Targets
Lorenzo Capineri;David J. Daniels;Pierluigi Falorni;Olga Lucia Lopera;Colin G. Windsor
PIER Letters , 2008, DOI: 10.2528/PIERL07122803
Abstract: Combined ground penetrating radar and metal detector equipment are now available (e.g., MINEHOUND, ERA Technology- Vallon GmbH) for landmine detection. The performance of the radar detector is influenced by the electromagnetic characteristics of the soil. In this paper we present an experimental procedure that uses the same equipment for the detection and calibration by means of signal processing procedures for the estimation of the relative permittivity of the soil. The experimental uncertainties of this method are also reported.
Valoración del programa "enfermería de urgencia", licenciatura en enfermería Assessment of the Emergency Nursing Program. Bachelor of Science in Nursing
Yamis Lorenzo Nieves,Yamileidys Cabrera Sánchez,Olga M Mirelis Hernández,Adalina Romero López
Revista de Ciencias M??dicas de Pinar del R?-o , 2007,
Abstract: El dise o curricular en las profesiones de ciencias de la salud constituye en la actualidad uno de los campos teóricos y prácticos que concita mayores debates. Baste decir que la pretensión que subyace es la de dise ar planes de estudio que conduzcan a la formación de un egresado congruente con las expectativas de la sociedad en función de sus necesidades de salud, de modo que el futuro profesional adquiera los conocimientos, habilidades y valores que lo capaciten para desempe ar plenamente las funciones que de él se esperan una vez graduado, por lo que realizamos una valoración del Programa de Enfermería de Urgencias, para lo que tuvimos en cuenta todas las categorías de la didáctica: problema, objetivo, contenido, métodos, medios y evaluación. Considerando que el programa tributa a la formación del egresado a que se aspira formar. Con este trabajo pretendemos realizar una valoración crítica del programa de esta asignatura. The Curricular Design in the Medical Science professions is one of the most debated theoretic and practical field nowadays. The aim is to design study plans which lead to the formation of a graduate consistent with the expectations of society according to its health requirements ,so we made an evaluation of the Nursing Emergency Program bearing in mind all the following didactic categories: problem, objective , methods , aids and valuation. The program is considered tributary to the formation of the graduate.
Is it plausible to expect a close encounter of the Earth with a yet undiscovered astronomical object in the next few years?  [PDF]
Lorenzo Iorio
Natural Science (NS) , 2010, DOI: 10.4236/ns.2010.211146
Abstract: We analytically and numerically investigate the possibility that a still undiscovered body X, moving along an unbound hyperbolic path from outside the solar system, may penetrate its inner regions in the next few years posing a threat to the Earth. By conservatively using as initial position of X the lower bounds on the present‐day distance of X dynamically inferred from the gravitational perturbations induced by it on the orbital motions of the planets of the solar system, both the analyses show that, in order to reach the Earth’s orbit in the next 2 yr, X should move at a highly unrealistic speed , whatever its mass is. For example, by assuming for it a solar ( M ) or brown dwarf mass ( ), now at not less than kau (1 kau=1000 astronomical units), v would be of the order of and of the speed of light c, respectively. By assuming larger present‐day distances for X, on the basis of the lacking of direct observational evidences of electromagnetic origin for it, its speed would be even higher. Instead, the fastest solitary massive objects known so far, like hypervelocity stars (HVSs) and supernova remnants (SRs), travel at , having acquired so huge velocities in some of the most violent astrophysical phenomena like interactions with supermassive galactic black holes and supernova explosions. It turns out that the orbit of the Earth would not be macroscopically altered by a close (0.2 au) passage of such an ultrafast body X in the next 2 yr. On the contrary, our planet would be hurled into the space if a Sun‐sized body X would encounter it by moving at . On the other hand, this would imply that such a X should be now at just 20-30 au, contrary to all direct observational and indirect dynamical evidences.
On Some Critical Issues of the LAGEOS-Based Tests of the Lense-Thirring Effect  [PDF]
Lorenzo Iorio
Journal of Modern Physics (JMP) , 2011, DOI: 10.4236/jmp.2011.24029
Abstract: We summarize some critical issues pertaining the tests of the general relativistic Lense-Thirring effect performed by I. Ciufolini and coworkers in the gravitational field of the Earth with the geodetic satellites LAGEOS and LAGEOS II tracked with the Satellite Laser Ranging technique.
On Possible A-Priori “Imprinting” of General Relativity Itself on the Performed Lense-Thirring Tests with LAGEOS Satellites  [PDF]
Lorenzo Iorio
Communications and Network (CN) , 2010, DOI: 10.4236/cn.2010.21003
Abstract: The impact of possible a-priori “imprinting” effects of general relativity itself on recent attempts to measure the general relativistic Lense-Thirring effect with the LAGEOS satellites orbiting the Earth and the terrestrial geopotential models from the dedicated mission GRACE is investigated. It is analytically shown that general relativity, not explicitly solved for in the GRACE-based models, may “imprint” their even zonal harmonic coeffi-cients of low degrees at a non-negligible level, given the present-day accuracy in recovering them. This trans-lates into a bias of the LAGEOS-based relativistic tests as large as the Lense-Thirring effect itself. Further analyses should include general relativity itself in the GRACE data processing by explicitly solving for it.
Orbital effects of Sun’s mass loss and the Earth’s fate  [PDF]
Lorenzo Iorio
Natural Science (NS) , 2010, DOI: 10.4236/ns.2010.24041
Abstract: I calculate the classical effects induced by an isotropic mass loss of a body on the orbital motion of a test particle around it; the present analysis is also valid for a variation of the Newtonian constant of gravitation. I perturbatively obtain negative secular rates for the osculating semimajor axis a, the eccentricity e and the mean anomaly , while the argument of pericenter ω does not undergo secular precession, like the longitude of the ascending node Ω and the inclination I. The anomalistic period is different from the Keplerian one, being larger than it. The true orbit, instead, expands, as shown by a numerical integration of the equations of motion in Cartesian coordinates; in fact, this is in agreement with the seemingly counter-intuitive decreasing of a and e because they only refer to the osculating Keplerian ellipses which approximate the trajectory at each instant. By assuming for the Sun it turns out that the Earth's perihelion position is displaced outward by 1.3 cm along the fixed line of apsides after each revolution. By applying our results to the phase in which the radius of the Sun, already moved to the Red Giant Branch of the Hertzsprung-Russell Diagram, will become as large as 1.20 AU in about 1 Myr, I find that the Earth's perihelion position on the fixed line of the apsides will increase by AU (for ); other researchers point towards an increase of AU. Mercury will be destroyed already at the end of the Main Sequence, while Venus should be engulfed in the initial phase of the Red Giant Branch phase; the orbits of the outer planets will increase by AU. Simultaneous long-term numerical integrations of the equations of motion of all the major bodies of the solar system, with the inclusion of a mass-loss term in the dynamical force models as well, are required to check if the mutual N-body interactions may substantially change the picture analytically outlined here, especially in the Red Giant Branch phase in which Mercury and Venus may be removed from the integration.
The Relativistic Three-Dimensional Evolution of SN 1987A  [PDF]
Lorenzo Zaninetti
International Journal of Astronomy and Astrophysics (IJAA) , 2014, DOI: 10.4236/ijaa.2014.42030

The high velocities observed in supernovae require a relativistic treatment for the equation of motion in the presence of gradients in the density of the interstellar medium. The adopted theory is that of the thin layer approximation. The chosen medium is auto-gravitating with respect to an equatorial plane. The differential equation which governs the relativistic conservation of momentum is solved numerically and by recursion. The asymmetric field of relativistic velocities as well the time dilation is plotted at the age of 1 yr for SN 1987A.

Classical and Relativistic Flux of Energy Conservation in Astrophysical Jets  [PDF]
Lorenzo Zaninetti
Journal of High Energy Physics, Gravitation and Cosmology (JHEPGC) , 2016, DOI: 10.4236/jhepgc.2016.21005
Abstract: The conservation of the energy flux in turbulent jets which propagate in the intergalactic medium (IGM) allows deducing the law of motion in the classical and relativistic cases. Three types of IGM are considered: constant density, hyperbolic and inverse power law decrease of density. An analytical law for the evolution of the magnetic field along the radio-jets is deduced using a linear relation between the magnetic pressure and the rest density. Astrophysical applications are made to the centerline intensity of synchrotron emission in NGC315 and to the magnetic field of 3C273.
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