[en] One of the most important challenges for third world countries is to increase overall efficiency in order to reduce the costs of development. To this end, management of energy is fundamental if the need for heavy investment is to be reduced, above all investment in electricity. In Brazil, moreover, environmental effects in Amazonia are directly related to the provision of electricity. This article presents the energy conservation work realized thus far in Sao Paulo, the most heavily populated and industrialized state in Brazil, along with the principal results obtained. (author). 1 tab

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[en] The reactions K^-p → π^-Σ⁺(1385) and K^-p → π⁺Σ^-(1385) are studied at 4.2 GeV/c incident momentum using data from a high statistics bubble chamber experiment corresponding to approximately 80 events/μb. The total and differential cross sections are presented. Amplitude analyses are performed and the complete Σ^+-(1385) helicity spin density matrices are extracted. The results are compared with the predictions of the additive quark model and exchange degeneracy. A substantial cross section is observed for the reaction K^-p → π⁺Σ^-(1385) in the forward direction, which implies exotic meson quantum numbers in the t-channel. One possible interpretation of this process provides an explanation for the small but significant violations of the additive quark model predictions observed in the reaction K^-p → π^-Σ⁺(1385) at low four-momentum transfer. In the backward direction unnatural parity exchange is shown to give a larger contribution to K^-p → Σ^-(1385)π⁺ than natural parity exchange. (Auth.)

[en] Results are presented for the quasi two-body hypercharge exchange reactions of the type 0^-1/2⁺→1^-3/2⁺(K^-p→rho^-Σ⁺(1385) K^-p→phiΣ⁰(1385)) and 0^-1/2⁺→1^-3/2^-(K^-p→ωΛ(1520) K^-p→phiΛ(1520)) using data from a high statistics bubble chamber experiment. Total and differential cross sections and the momentum transfer dependence of the meson and hyperon resonance single density matrix elements are discussed. Amplitude analyses are performed for the first two reactions. The results are compared with quark model and duality predictions and with those from other related reactions. (Auth.)

No abstract available

No abstract available