Saddle Points Stability in the Replica Approach Off Equilibrium

We study the replica free energy surface for a spin glass model near the glassy temperature. In this model the simplicity of the equilibrium solution hides non trivial metastable saddle points. By means of the stability analysis performed for one and two real replicas constrained, an interpretation for some of them is achieved.Comment: 10 pages and 3 figures upon request, Univerista` di Roma I preprint 94/100

Partial actions of groups on algebras, a survey

In this survey paper we define partial actions of groups on algebras and give several related results. For any partial action a partial skew group ring is defined. This partial skew group ring is not always associative. Conditions under which associativity holds are studied. Several other questions are considered like, for example, enveloping actions and properties of partial skew group rings

Closed Submodules of Centred Bimodules over Prime Rings, and Applications

This paper is a survey on results of several papers by the author. In the first two sections we smmnarize the main results on closed submodules of centred bimodules over prime rings. In the rest of the paper we mention several applications of the results, mainly to study properties concerning prime ideals and radicals of centred extensions

An Introduction to Kõthe's Conjecture and Polynomial Rings

In this paper we give an introduction to Kéithe's conjecture. We summarize results on the conjecture emphasizing relations with polynomial rings. We also give some results on polynomial rings in several indeterminates and connected questions

Bibliografía referenciada en la Licenciatura en Psicología en la Universidad Nacional de San Luis según año de cursadas

Muchos estudios actuales, tanto nacionales como internacionales, toman como eje central la formación de los psicólogos en las universidades. Los mismos recurren a diversos enfoques y herramientas, brindando una perspectiva cada vez más clara sobre varios aspectos de las carreras de psicología. El presente estudio se enfoca en ciertas características de los textos referenciados en los programas de las asignaturas correspondientes al actual plan de estudios de la carrera de psicología en la Universidad Nacional de San Luis, plan 4/96 y modificaciones 21/99 y 01/04. Cabe destacar que dicha carrera de psicología cuenta con una opción única en el país: la posibilidad de que los alumnos de la carrera seleccionen la orientación teórica de siete de sus cursos avanzados. Desde el punto de vista metodológico, este estudio recurre a herramientas sociobibliométricas aplicadas a los programas de las asignaturas, y específicamente, a la sección de los mismos en la cual se explicita la bibliografía. Las herramientas sociobibliométricas utilizadas permiten observar características destacables en relación con la cantidad de material que los alumnos deben leer, según sea el año de la currícula que estén cursando.Many current studies, both national and international, focus on the teaching and training of psychologists in universities. These studies use many tools and approaches, giving an increasingly clear view on many aspects of the undergraduate programs in psychology. This research focuses on some aspects of the referenced texts in the syllabi of the courses belonging to the undergraduate program of psychology taught in the National University of San Luis, according to the latest general regulations 4/96, and the modifications of 21/99 and 01/04. It is worth mentioning that this undergraduate program is the only one in the country where students can choose a set of seven advanced courses divided by their theoretical approach. From a methdological standpoint, this study applies sociobibliometric tools to analyse the syllabi of the undegraduate program's courses, particularly to the section where their bibliography is listed. The sociobibliometric tools used allow the observation of certain remarkable characteristics related to the amount of material that students are required to read, depending on how advanced they are in the undergraduate program.Fil: Vázquez Ferrero, Sebastián Miguel. Universidad Nacional de San Luis; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Luis; Argentin

Principal Ideals in Ore Extensions

In this paper we prove that if R is a prime ring and I is an R-disjoint ideal of an Ore extension R[&#967;, &#948;,d], then I is closed and principal generated by a normal polynomial of minimal degree if and only if I contains a Sharma polynomial of minimal degree.</p

Ten-year long-term results of total joint arthroplasties with ARPE® implant in the treatment of trapeziometacarpal osteoarthritis

Producción CientíficaBetween May 1999 and April 2002 a total of 69 consecutive thumb carpometacarpal joint arthoplasties were performed in a total of 64 patients for carpometacarpal joint osteoarthritis using the cementless hydroxyapatite (HA)-coated unconstrained ARPE implant. Clinical, functional and radiological results at 10-year follow-up are presented. Survival analysis was performed using the Kaplan–Meier method. Of the 64 patients, fourwere lost to follow-up, 60 implants (92.3%) were functional and five (7.7%) were not (two dislocated, two were removed and one with aseptic loosening). Survival estimate for functional implants over 10 years was 93.9%(95% confidence interval 82.3–97.9). The radiographs were satisfactory in 82.4%. There was subsidence of thecup in 15.8%. Thumb carpometacarpal joint arthroplasty with the ARPE implant offers a reliable treatmentalternative in patients with Eaton grade III or IV thumb carpometacarpal joint arthritis in the presence of good bone stock