Browsing by Title
Now showing items 7-26 of 3752
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A 25 años de la primera reacción nuclear en cadena
(Asociación Argentina para el Progreso de las Ciencias, 1967)En la tarde del 2 de diciembre de 1942 tuvo lugar, en una vieja cancha de pelota perteneciente a la Universidad de Chicago, la primera reacción nuclear en cadena provocada por la mano del hombre. En los días sucesivos, ... -
A comparative review of certain Gauge theories of the gravitational field.
(Springer Science, 1980)A general formal analysis is made trying to obtain a better understanding and greater syn thesis of the mathematical structure of the gravitational field’s Gauge theories. Under this approach, some misstatements appearing ... -
A comparison between gel grown and solution grown crystals - case of ADP and KDP
(1982)Water soluble crystals such as ADP and KDP have been grown in TMS gels by different techniques. A study of growth defects by X-ray topography shows that these gel grown crystals obtained by a very simple technique can be ... -
A countercurrent gaseous diffusion process. Theory of the separation at equilibrium
(1956)An experim ental device for the obtention of a gaseous diffusion countercurrent process is proposed. The theory of the separation at equilibriurn for a binary isotopic m ixture is developed on the basis of the transport ... -
A generalised lattice correspondence for phase transformation.
(Comisión Nacional de Energía Atómica (Argentina), 1976)Each atom in a given position of the matrix phase is assigned a certain probability that it will occupy, upon transformation, a given site in the product phase. This probabilistic view of the atomic movements permitsa to ... -
A model for the rubber-llke behaviour in CU-Zn-Al martensitea.
(Pergamos Press, 1978)In a previous paper the rubber like behavior of Cu-Zn-Al martensites was described and the crystallography of the corresponding transformation was analyzed. It was shown that the deformation of the martensite leads to the ... -
A new ferroelectric: Guanidinium uranyl sulfate trihydrate.
(Taylor & Francis, 1978)Dielectric behaviour studies have been carried out on (C(NH2) 3) 2) - UO2 - (SO4)2 - 3H2O, a member of the family of guanidinium sulfate hydrates. The uranyl compound, which is not isomorphous with G.A.S.H., is ferroelectric ... -
A note on the equation of state for systems that underqo valence changes.
(Pergamon Press, 1974)In this paper we want to discuss in a simple way the equation of state of a system that undergoes valence changes. This requires consideration of the cohesive energy of the compounds which is, in general, a major problem. ... -
A regularization method for Fourier series of discontinuous functions
(1982)A regularization procedure, based on the punctual Padé approximants, is used to treat Fourier series of discontinuous functions. The arising difficulties for such series are easily overcome by this method. Probably the sam ... -
A renormalisation group technique for spin and gauge systems with topological excitations
(American Physics Society, 1982)We present a real space renormalisation group technique able to deal explicitly with gases of topological excitations. As examples we consider the two-dimensional X Y model and the three-dimensional compact electrodynamics. -
A study of neutron damage in be-doped copper
(Taylor & Francis, 1970)The experiments of Mclntyre (1957) on the nature of the defects induced by fast neutrons in copper have been repeated, and confirm his result. It is shown that the addition of a small amount of beryllium to the copper does ... -
About the Calculation of Electronic Transitions in the Original CNDO/2 Treatment
(1973)The original C N D O /2 m ethod is adapted to the open shell case in order to calcúlate the first singlet-triplet electronic transition. The m olecular wave functions are optim ized, m inim izingthefundam ental and excited ... -
Acción de fuerzas inerciales sobre ondas.
(Instituto de Física "José A. Balseiro". Universidad Nacional de Cuyo. Comisión Nacional de Energía Atómica, 1974)Estamos interesados en estudiar la acción de las fuerzas de inercia sobre una partícula cuántica un espacio riemaniano de dimensión finita- Podremos así estudiar elmovimiento del centro de gravedad de un paquete y poner ... -
Acción de los campos vectorial y tensorial sobre el spin.
(Universidad Nacional de Cuyo (Argentina). Instituto de Física "Dr. J. A. BalseiroComisión Nacional de Energía Atómica (Argentina). Centro Atómico Bariloche., 1972)En el presente trabajo se considerará el caso particular de la acción de campos vectoriales (electromagnéticos) y tensoriales de rango dos (gravitatorios) externos sobre un campo espinorial (electrón de Dirac de espín). ... -
Aceleración y propagación de rayos cósmicos en ambientes astrofísicos de alta metalicidad
(2020)El origen de los rayos cósmicos ultra energéticos (1018 -1020 eV) es uno de los misterios más persistentes de la astrofísica contemporánea. Aunque la radiación del fondo cósmico de microondas permite confinar las posibles ...
