Aplicação de análise de valor em simulação de alternativas de projetos industriais

O presente trabalho visa apresentar o uso da Análise de Valor em simulação de processos industriais, objetivando uma resposta mais rápida e com maior segurança, na fase de tomada de decisã

In-beam investigation and the structure of states in "1"1"3Sn

The results of in-beam investigations of "1"1"3Sn using the (p,n), (p,3n), (#alpha#,n) and (#alpha#,2n) reactions are summarized. Excited states have been identified until E_x=4715 MeV and J"#pi#=(27/2"-). For a large number of levels mean lifetimes #tau# have been determined with the DSA method. For the J"#pi#=25/2"+ state at E_x=4059 MeV, #tau#=1.0(4) ns has been measured with the #gamma#-RF method. The experimental results are compared with the predictions of shell-model calculations. Most of the positive-parity states may be considered as one- or three-quasiparticle neutron excitations of the 2d_5_/_2, 1g_7_/_2, 3s_1_/_2 and 2d_3_/_2 shells, the negative-parity states as the coupling of one 1h_1_1_/_2 neutron to the two- or four-quasiparticle neutron excitations in the even-mass "1"1"2Sn core. For the 25/2"+ isomer the three-quasiparticle neutron configuration #nu#(h"2_1_1_/_2g"-"1_7_/_2) has been proposed on the basis of a shell-model analysis using the mass formula formalism. The experimentally observed yrast states in _5_0"1"1"3Sn_6_3 are compared with the corresponding states in the valence-mirror nucleus _6_3"1"4"5Eu_8_2 giving remarkable similarities although the parameters for the shell-model calculations differ considerably. The analysis of nearest-neighbour spacing distributions of 5/2"+ states in "1"1"3Sn does not allow definite conclusions about regularity or chaos. (orig.)59 refs.Available from TIB Hannover: RR 1847(95) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

NONCOMMUTATIVE GEOMETRY YEAR 2000

Our geometric concepts evolved first through the discovery of NonEuclidean geometry. The discovery of quantum mechanics in the form of the noncommuting coordinates on the phase space of atomic systems entails an equally drastic evolution. We describe a basic construction which extends the familiar duality between ordinary spaces and commutative algebras to a duality between Quotient spaces and Noncommutative algebras. The basic tools of the theory, K-theory, Cyclic cohomology, Morita equivalence, Operator theoretic index theorems, Hopf algebra symmetry are reviewed. They cover the global aspects of noncommutative spaces, such as the transformation θ → 1/θ for the noncommutative torus T 2 θ which are unseen in perturbative expansions in θ such as star or Moyal products. We discuss the foundational problem of ”what is a manifold in NCG ” and explain the fundamental role of Poincare duality in K-homology which is the basic reason for the spectral point of view. This leads us, when specializing to 4-geometries to a universal algebra called the ”Instanton algebra”. We describe our joint work with G. Landi which gives noncommutative spheres S4 θ from representations of the Instanton algebra. We show that any compact Riemannian spin manifold whose isometry group has rank r ≥ 2 admits isospectral deformations to noncommutative geometries. We give a survey of several recent developments. First our joint work with H. Moscovici on the transverse geometry of foliations which yields a diffeomorphism invariant (rather than the usual covariant one) geometry on the bundle of metrics on a manifold and a natural extension of cyclic cohomology to Hopf algebras. Second, our joint work with D. Kreimer on renormalization and the Riemann-Hilbert problem. Finally we describe the spectral realization of zeros of zeta and L-functions from the noncommutative space of Adele classes on a global field and its relation with the Arthur-Selberg trace formula in the Langlands program. We end with a tentalizing connection between the renormalization group and the missing Galois theory at Archimedian places. 1