No abstract available

[en] The authors present measurements of the neutron lifetime (τ_n) carried out with a gravitational trap for ultracold neutrons. They show that statistical uncertainty in the measured storage time is the principal contributor to experimental error. Measurements using oxygen-coated traps yield τ_n = 888.4 ± 3.1_stat ± 1.1_systs. Since the systematic errors derive from a large number of independent factors, they quote a final value of τ_n = 888.4 ± 3.3 s. 9 refs., 6 figs., 3 tabs

[en] Safe management of operating lifetimes of Nuclear Power Plants is a subject of prime interests. As the design life of the Nuclear Power Plant will be ended in 2008, an appropriate procedure for the design life re-assessment or lifetime extension is necessary in Korea. Therefore, the objective of this work is to develop procedural requirements which can be applied to the regulation of lifetime management or life extension of Nuclear Power Plants in Korea. Review on the linkage of the PSR with the extension of the operating lifetime of Nuclear Power Plants was performed to enhance the utilization of PSR results and analysis of the insufficiencies in the license rule in Korea

[en] Actual observation data are used to show that the course of the relative sunspot number R is fully determined by the number of sunspot groups f₀ formed per unit time and their average lifetime T₀. The approximate numerical value of the coefficient K in the formula R=Kf₀T₀ is determined and discussed simultaneously. (author)

[en] The disagreement between theoretical and experimental values of the orthopositronium decay rate (the lifetime) is described, and possible reasons of its existence are discussed. The new experiment setting-up promising to improve significantly the measurement precision is briefly presented

[en] There are a number of ways in which solenoid valve lifetime can be extended, thereby improving plant availability and reducing operating costs. These are outlined. (author)

[en] Charmed meson pairs have been photoproduced coherently on an active multilayer silicon target in the energy range 80-150 GeV. D antiD and F antiF state have been identified and an estimate of the lifetimes is given

[en] The editors have dedicated this special issue on superconducting materials “to Ted Geballe in honor of his numerous seminal contributions to the field of superconducting materials over more than 60 years, on the year of his 95th birthday.” Here, as an executive summary, are just a few highlights of his research in superconductivity, leavened with some anecdotes, and ending with some of Ted’s general insights and words of wisdom

No abstract available

[en] This a brief summary of the communications describing the experimental projects on the determination of the nucleon lifetime and on the study of its decay modes. The large water Cerenkov detector and the calorimeters are presented