The η-meson photoproduction cross sections have been measured on the C and Cu targets for the photon energies between 600 and 1100 MeV to investigate the behavior of the S11(1535) resonance in a nucleus. The excitation functions of the cross section as well as the angular and momentum distributions of η-mesons are in quantitative agreement with the QuantumMolecular Dynamics (QMD) model calculat...

We calculate photoexcitation amplitudes for all nucleon and ∆ resonances up to √ s=1.6 GeV. We use a chiral quark model including two-body exchange currents. The two-body currents give important contributions. For the ∆(1232) and the D13(1520) we observe that the individual exchange current contributions considerably cancel each other while for the P11(1440), the P33(1600), and the S11(1535) we...

The η-meson photoproduction cross sections have been measured on the C and Cu targets for the photon energies between 600 and 1100 MeV to investigate the behavior of the S11(1535) resonance in a nucleus. The excitation functions of the cross section as well as the angular and momentum distributions of η-mesons are in quantitative agreement with the QuantumMolecular Dynamics (QMD) model calculat...

The πN N * and ηN N * coupling constants are studied in the QCD sum rule (N * ≡ N (1535)). We investigate the two point functions between the vacuum and a one meson state in the soft meson limit, extracting the contributions from N (1535) in the way we have formulated previously. The operator product expansion is performed up to the terms of dimension eight. We find that g πN N * vanishes to th...

Each Gr-category (or categorical group) is Gr-equivalent to a Grcategory of type (Π, A, ξ), where Π is a group, A is a Π-module and ξ is a 3-cocycle of Π, with coefficients in A. In this paper, first we show that each Gr-functor induces one between Gr-categories of type (Π, C). Then we give results on the existence of Gr-functor and the classification of Gr-functors by cohomology groups H(Π, C)...

Abstract Reactive synthesis is an automated procedure to obtain a correct-by-construction reactive system from its temporal logic specification. GR(1) expressive assume-guarantee fragment of LTL that enables efficient and has been recently used in different contexts application domains. A common form providing system's requirements through use cases, which are existential nature. However, GR(1)...

RICHARD HUNTER and IDA MACALPINE, Three hundred years ofpsychiatry 15351860, [reprint], Hartsdale, NY, Carlisle Publishing Inc., 1982, 8vo, pp. xxvi, 1107, illus., $95.00. Three hundred years ofpsychiatry is without doubt one of the best books ever produced on the history of psychiatry. Most collections of extracts are at most useful for casual browsing and conveying a flavour of original sourc...