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Search Results: 1 - 10 of 20277 matches for " Manuel Rodriguez Susa "
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Technico-Economical Evaluation of CO2 Transport in an Adsorbed Phase  [PDF]
Mildred Lemus Perez, Manuel Rodriguez Susa, Mario Pellerano, Arnaud Delebarre
Low Carbon Economy (LCE) , 2012, DOI: 10.4236/lce.2012.31004
Abstract: This work considers the possibility to transport CO2 in an adsorbed phase and analyzes its cost as a function of transported quantities, transport conditions and transportation means. CO2 adsorption capacities of 6 different adsorbents, comprising 4 activated carbons and 2 zeolites, were empirically evaluated in a given range of pressure and temperature. The adsorbent with the highest mass adsorption capacity (AC1), as well as another sorbent described in the literature (AC5) were selected to be used for CO2 transportation by ships, trains or trucks. Their characteristics and performances were then used to develop an economic analysis of transportation costs and CO2 emissions generated by the transport with or without storage. Economic evaluation of CO2 batch transport shows that CO2 transported in an adsorbed phase by train was seen to be almost competitive on distances between 250 and 500 km, in comparison to liquefied CO2. One of the activated carbon appeared to be competitive on short distances by truck when transport was not followed by storage. Ship transport of adsorbed CO2 on distances around 1500 km was competitive, when CO2 was used as delivered; there was an over cost of only 16%, when there was storage after the transport. The CO2 emissions generated by CO2 transport and storage when transport is carried out in an adsorbed phase were smaller than the ones generated by liquid phase transport below 1200 km, 500 km and 300 km by ship, train and truck respectively, as a function of the adsorbent used. Adsorbed CO2 transported on 1500 km by ship generated 27% less CO2 emissions than liquid phase and 17% by train for a distance of 250 km and 16% by truck on 150 km, although these differences were decreasing with the distance of transport.
Infecciones por el virus Coxsackie
Revista chilena de pediatría , 1953,
Abscesos hepáticos múltiples por Salmonella Typhosa
Revista chilena de pediatría , 1955,
Estudios sobre la Escherichia Coli
Revista chilena de pediatría , 1956,
Diagnostico bacteriológico precoz de la difteria
Revista chilena de pediatría , 1954,
The interaction of binary systems with accretion disks
Manuel Ortega Rodriguez
Revista mexicana de astronomía y astrofísica , 2004,
Abstract: Se estudia las uctuaciones (temporales) en la radiaci on saliente de discos de acreci on en sistemas binarios, con el objeto de determinar las propiedades de dichos sistemas (comparando con las observaciones), tales como el momento angular de la estrella compacta alojada en el disco. Despu es de una discusi on de los efectos de la estrella compa~nera se presenta una predicci on de la frecuencia de la radiaci on saliente (modulada) de rayos X.
El caso de la PUCP y la interpretación de los testamentos
Manuel Atienza Rodriguez
Derecho PUCP , 2010,
Abstract: Analiza la sentencia relacionada con el caso PUCP y examina la argumentación del Tribunal Constitucional (del 17 de marzo de 2010) del Tribunal Constitucional Peruano.
Spin current generation by helical states in a quasi-one-dimensional system
Manuel Valin-Rodriguez
Physics , 2011,
Abstract: Time-reversal symmetry and rotational invariance in spin space characterize usual non-magnetic conductors. These symmetries give rise, at least, to four-fold degenerate multiplets which, by definition, exhibit a null total spin-momentum helicity. Thus, preventing a net spin transport. A proper choice of geometry along with the intrinsic symmetry of the Bychkov-Rashba spin-orbit interaction can be exploited to effectively reduce these two spin-related symmetries to the timereversal one. It is shown that, in an ideal geometry, a quantum dot with contacts having a specific geometry exhibit a single pair of helical propagating states which makes this system ideal for pure spin current generation. The strong quantization of the quantum dot's level structure would make this mechanism robust against temperature effects.
Predicted signatures of the intrinsic spin Hall effect in closed systems
Manuel Valin-Rodriguez
Physics , 2011, DOI: 10.1103/PhysRevLett.107.266801
Abstract: We study a two-dimensional electron system in the presence of spin-orbit interaction. It is shown analytically that the spin-orbit interaction acts as a transversal effective electric field, whose orientation depends on the sign of the $\hat{z}$-axis spin projection. This effect doesn't require any driving external field and is inherent to the spin-orbit interactions present in semiconductor materials. Therefore, it should manifest in both closed and open systems. It is proposed an experiment to observe the intrinsic spin Hall effect in the far infrared absorption of an asymmetric semiconductor nanostructure.
Renormalization of spin-orbit coupling in quantum dots due to Zeeman interaction
Manuel Valin-Rodriguez
Physics , 2004, DOI: 10.1103/PhysRevB.70.033306
Abstract: We derive analitycally a partial diagonalization of the Hamiltonian representing a quantum dot including spin-orbit interaction and Zeeman energy on an equal footing. It is shown that the interplay between these two terms results in a renormalization of the spin-orbit intensity. The relation between this feature and experimental observations on conductance fluctuations is discussed, finding a good agreement between the model predictions and the experimental behavior.
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