A BAYESIAN ANALYSIS OF THE AGES OF FOUR OPEN CLUSTERS

In this paper we apply a Bayesian technique to determine the best fit of stellar evolution models to find the main sequence turn off age and other cluster parameters of four intermediate-age open clusters: NGC 2360, NGC 2477, NGC 2660, and NGC 3960. Our algorithm utilizes a Markov chain Monte Carlo technique to fit these various parameters, objectively finding the best fit isochrone for each cluster. The result is a high precision isochrone fit. We compare these results with the those of traditional “by eye” isochrone fitting methods. By applying this Bayesian technique to NGC 2360, NGC 2477, NGC 2660, and NGC 3960 we determine the ages of these clusters to be 1.35 ± 0.05, 1.02 ± 0.02, 1.64 ± 0.04, and 0.860 ± 0.04 Gyr, respectively. The results of this paper continue our effort to determine cluster ages to higher precision than that offered by these traditional methods of isochrone fitting

Radius Stabilization by Two-Loop Casimir Energy

It is well known that the Casimir energy of bulk fields induces a non-trivial potential for the compactification radius of higher-dimensional field theories. On dimensional grounds, the 1-loop potential is ~ 1/R^4. Since the 5d gauge coupling constant g^2 has the dimension of length, the two-loop correction is ~ g^2/R^5. The interplay of these two terms leads, under very general circumstances (including other interacting theories and more compact dimensions), to a stabilization at finite radius. Perturbative control or, equivalently, a parametrically large compact radius is ensured if the 1-loop coefficient is small because of an approximate fermion-boson cancellation. This is similar to the perturbativity argument underlying the Banks-Zaks fixed point proposal. Our analysis includes a scalar toy model, 5d Yang-Mills theory with charged matter, the examination of S^1 and S^1/Z_2 geometries, as well as a brief discussion of the supersymmetric case with Scherk-Schwarz SUSY breaking. 2-Loop calculability in the S^1/Z_2 case relies on the log-enhancement of boundary kinetic terms at the 1-loop level.Comment: 18 pages, 2 figures, uses axodraw, references adde

Perfil gerencial no setor militar e privado na área da saúde

TCC (especialização). Universidade Federal de Santa Catarina. Associação Catarinense de Medicina. Curso de Especialização em Medicina do TrabalhoA saúde é considerada, a nível de gerenciamento, a mais difícil de manejo, liderança e administração. Visto que, cada paciente é um caso a ser analisado subjetivamente. Assim, o gestor no setor da saúde, necessita basear-se em modelos gerenciais e adaptar seu próprio estilo, baseando-se em suas características pessoais e de relacionamento com seus subordinados e superiores. Para sabermos a diferença de gestão no meio militar e privado (setor saúde), procuramos identificar características pessoais e estilos de gerência. Para definir tais dificuldades e diferenças, adotou-se instrumentos como: questionário, testes e entrevistas. E baseamo-nos nas teorias GRID, tentando caracterizar o estilo gerencial no meio militar e privado