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Search Results: 1 - 10 of 172 matches for " Guardia "
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Dos nuevos registros de piojos masticadores (Phthiraptera: Ischnocera: Philopteridae) sobre Leptotila megalura (Aves: Columbidae) en la Argentina
Guardia,Leonor ?;
Revista de la Sociedad Entomol?3gica Argentina , 2008,
Abstract: two species of chewing lice (phthiraptera: ischnocera: philopteridae), physconelloides ceratoceps ewing and columbicola gracilicapitis carriker are recorded for the first time on leptotila megalura sclater & salvin ("large-tailed dove") (aves: columbidae). in addition, c. gracilicapitis is recorded for the first time in argentina.
Dos nuevos registros de piojos masticadores (Phthiraptera: Ischnocera: Philopteridae) sobre Leptotila megalura (Aves: Columbidae) en la Argentina Two new records of chewing lice (Phthiraptera: Ischnocera: Philopteridae) on Leptotila megalura (Aves: Columbidae) from Argentina
Leonor Guardia
Revista de la Sociedad Entomol?3gica Argentina , 2008,
Abstract: Dos especies de piojos masticadores (Phthiraptera: Ischnocera: Philopteridae), Physconelloides ceratoceps Ewing y Columbicola gracilicapitis Carriker, son registradas por primera vez sobre Leptotila megalura Sclater & Salvin ("yerutí yungue a") (Aves: Columbidae). Además, C. gracilicapitis es citada por primera vez para la Argentina. Two species of chewing lice (Phthiraptera: Ischnocera: Philopteridae), Physconelloides ceratoceps Ewing and Columbicola gracilicapitis Carriker are recorded for the first time on Leptotila megalura Sclater & Salvin ("Large-tailed dove") (Aves: Columbidae). In addition, C. gracilicapitis is recorded for the first time in Argentina.
La búsqueda da la identidad nacional a través de la desconstrucción del discurso colonial
Gloria Guardia
Revista de Estudios Sociales , 2001,
Abstract:
On the Torelli problem and Jacobian Nullwerte in genus three
Jordi Guardia
Mathematics , 2009,
Abstract: We give a closed formula for recovering a non-hyperelliptic genus three curve from its period matrix, and derive some identities between Jacobian Nullwerte in dimension three.
Growth of Sobolev norms in the cubic defocusing nonlinear Schr?dinger equation with a convolution potential
Marcel Guardia
Mathematics , 2012,
Abstract: Fix $s>1$. Colliander, Keel, Staffilani, Tao and Takaoka proved in \cite{CollianderKSTT10} the existence of solutions of the cubic defocusing nonlinear Schr\"odinger equation in the two torus with $s$-Sobolev norm growing in time. In this paper we generalize their result to the cubic defocusing nonlinear Schr\"odinger equation with a convolution potential. Moreover, we show that the speed of growth is the same as the one obtained for the cubic defocusing nonlinear Schr\"odinger equation in \cite{GuardiaK12}. The results we obtain can deal with any potential in $H^{s_0}(\TT^2)$, $s_0>0$.
Splitting of separatrices in the resonances of nearly integrable Hamiltonian Systems of one and a half degrees of freedom
Marcel Guardia
Mathematics , 2012,
Abstract: In this paper we consider general nearly integrable analytic Hamiltonian systems of one and a half degrees of freedom which are a trigonometric polynomial in the angular state variable. In the resonances of these systems generically appear hyperbolic periodic orbits. We study the possible transversal intersections of their invariant manifolds, which is exponentially small, and we give an asymptotic formula for the measure of the splitting. We see that its asymptotic first order is of the form $K \varepsilon^{\beta} \text{e}^{-a/\varepsilon}$ and we identify the constants $K,\beta,a$ in terms of the system features. We compare our results with the classical Melnikov Theory and we show that, tipically, in the resonances of nearly integrable systems Melnikov Theory fails to predict correctly the constants $K$ and $\beta$ involved in the formula.
An integrated approach of analytical chemistry
Guardia, Miguel de la;
Journal of the Brazilian Chemical Society , 1999, DOI: 10.1590/S0103-50531999000600002
Abstract: the tremendous development of physical methods of analysis offers an impressive number of tools to simultaneously determine a large number of elements and compounds at very low concentration levels. todays analytical chemistry provides appropriate media to solve technical problems and to obtain correct information about chemical systems in order to take the most appropriate decisions for problem solving. in recent years the development of new strategies for sampling, sample treatment and data exploitation through the research on field sampling, microwaveassisted procedures and chemometrics, additionally the revolution of the analytical methodology provided by the development of flow analysis concepts and process analysis strategies offer a link between modern instrumentation and social or technological problems. the integrated approach of analytical chemistry requires correctly incorporating the developments in all of the fields of both, basic chemistry, instrumentation and information theory, in a scheme which considers all aspects of data obtention and interpretation taking also into consideration the side effects of chemical measurements. in this paper, new ideas and tools for trace analysis, speciation, surface analysis, data acquisition and data treatment, automation and decontamination, are presented in the frame of analytical chemistry as a problem solving strategy focused on the chemical composition of systems and on the specific figures of merit of the analytical measurements, like accuracy, precision, sensitivity, selectivity but also speed and cost. technological and industrial, but also environmental, health and social problems, have been considered as challenges for which solution the chemist should select the most appropriate tool and to develop an appropriate strategy.
Cirugía Bariátrica: editorial
Orlando Gei Guardia
Acta Médica Costarricense , 2006,
Abstract:
Rese a de "Mujer y filosofía en El pensamiento iberoamericano. Momentos de una relación difícil" de Raúl FORNET-BETANCOURT
Sara Beatriz GUARDIA
Utopia y Praxis Latinoamericana , 2009,
Abstract:
Arqui tec tu ra para quién? Arquitectura para qué?
Carlos Vera Guardia
Utopia y Praxis Latinoamericana , 2004,
Abstract: En este dis cur so el au tor pre sen ta una vi sión crítica, filosófica, ética y epistémica de la Arquitec - tura entendida como una disciplina cientí fica y hu - manís tica. En tal sentido Arquitectura es sinónimo de: i) representación sim bólica, conceptual y estéti - ca de la rea li dad, ii) de sa rro llo de las ba ses ma te ria - les de la vida en su con di ción de há bi tat, y iii) com - pro mi so éti co con la de fen sa y pro tec ción de las in - teracciones bióticas y ecológicas entre la naturaleza y el pro gre so hu ma no. Pa ra quién y para qué?, son dos pre gun tas para pen sar , acer ca de los fi nes y los me dios que con vier ten a la Arqui tec tu ra en un sa ber in ter pre tar y cons truir el há bi tat de la vida hu - mana desde la perspectiva histó rica, social, am - bien tal, eco nó mi ca y po lí ti ca en la que los se res hu - manos se desenvuelven.
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