Showing papers by "Jie Zhang published in 1990"
01 Sep 1990-Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment
TL;DR: This paper presents a solution to support strategic processes in a PSEE by providing a flexible guidance during process enactment and shows that supporting processes is more concerned with the flexibility of guidance offered during the process performance than with enforcement of a collection of predefined process models.
Abstract: Process-centred Software Engineering Environments (PSEE) are the most recent generation of environments supporting software development activities. Most of PSEE are based on mechanisms promoting enforcement and automation of process activities. In this kind of mechanisms the process models are prescribed in a detailed and complete way. But the experience shows that supporting processes is more concerned with the flexibility of guidance offered during the process performance than with enforcement of a collection of predefined process models. In this paper, we present a solution to support strategic processes in a PSEE by providing a flexible guidance during process enactment.
433 citations
TL;DR: In this article, the authors investigated the role of cultural determinism in the social regulation of the sports organization of the city of Nice in the French Riviera, and found a causal relationship between the type of trajectory of professional insertion of the municipal agents and their level of support in the manager politics of the organization.
99 citations
TL;DR: In this article, a search for the neutral Higgs boson in the mass range above 11 GeV (above the H 0 →b b threshold), using the process Z0→H0e+e−, Z0 →H0μ+μ− and Z 0 → H 0 v v, is performed on data collected by the ALEPH detector corresponding to about 25 000 events of Z0-hadrons.
61 citations
TL;DR: In this paper, a search for supersymmetric particles using acoplanar pairs of oppositely-charged particles in decays of the Z0 peak was performed, where approximately four are expected from background, allowing limits to be extended on combined photino and slepton masses.
58 citations
TL;DR: In this paper, a search for Z0→hadrons decays into pairs of possible new heavy quarks (t and b′), new heavy charged leptons (L±), stable heavy neutral leptonons (νL) and unstable heavy NPs (L0), allowing for both charged-current and flavor-changing neutral-current decays of the b′.
57 citations
TL;DR: In this article, a data sample corresponding to about 100 000 hadronic Z decays collected by ALEPH at LEP has been used to search for the standard Higgs boson produced in the reaction e + e − → H 0 Z 0∗.
56 citations
TL;DR: The light scalar Higgs boson h and the pseudoscalar h and A of the minimal supersymmetric standard model have been searched for in the processes e+e−→hff and e+ e−→ hA using data collected by ALEPH at the LEP e−e− collider, with center of mass energies at and near the Z peak as mentioned in this paper.
44 citations
TL;DR: In this article, the authors make an inquiry with professionals of the forming in physical and sports education, moving closer to this weak development of the popular sports with the cultural inheritance of the country.
31 citations
TL;DR: In this article, the authors present a knowledge management system for system restoration in Hydro-Quebec, which is made up of two modules: the knowledge engineering module, whereby modeling can be done of the system restoration strategy and known solutions in a knowledge base, and the planning module whereby system restoration plans can be drawn up based on the unavailability of power system equipment.
30 citations
TL;DR: In this article, the properties of the Z resonance from 62 500Z decays into fermion pairs collected with the ALEPH detector at LEP, the Large Electron-Positron storage ring at CERN, were reported.
Abstract: We report on the properties of theZ resonance from 62 500Z decays into fermion pairs collected with the ALEPH detector at LEP, the Large Electron-Positron storage ring at CERN. We findMZ=(91.193±0.016exp±0.030LEP) GeV, ΓZ=(2497±31) MeV, σhad0=(41.86±0.66)nb, and for the partial widths Γinv=(489±24) MeV, Γhad(1754±27) MeV, Γee=(85.0±1.6)MeV, Γμμ=(80.0±2.5) MeV, and Γττ=(81.3±2.5) MeV, all in good agreement with the Standard Model. Assuming lepton universality and using a lepton sample without distinction of the final state we measure Γu=(84.3±1.3) MeV. The forward-backward asymmetry in leptonic decays is used to determine the vector and axial-vector weak coupling constants of leptors,gv2(MZ2)=(0.12±0.12)×10−2 andgA2(MZ2)=0.2528±0.0040. The number of light neutrino species isNν=2.91±0.13; the electroweak mixing angle is sin2θW(MZ2)=0.2291±0.0040.
28 citations
TL;DR: In this paper, upper and lower limits on excited neutrino couplings were derived from the total width of the Z width, independent of the v∗ decay modes, for the ALEPH detector at LEP.
TL;DR: Transmission-electron-microscopy results show that the structure belongs to a monoclinic system that is different from reports by other groups and in agreement with the x-ray-diffraction analysis.
Abstract: The high-${\mathit{T}}_{\mathit{c}}$ (110-K) superconducting phase in the Pb-Bi-Sr-Ca-Cu-O has been isolated and its structural and physical properties investigated. Transmission-electron-microscopy results show that the structure belongs to a monoclinic system that is different from reports by other groups and in agreement with our x-ray-diffraction analysis. The refined crystal data are a=3.779 \AA{}, b=3.834 \AA{}, c=37.150 \AA{}, \ensuremath{\alpha}=\ensuremath{\beta}=90\ifmmode^\circ\else\textdegree\fi{}, \ensuremath{\gamma}=90\ifmmode^\circ\else\textdegree\fi{} 51', V=538.5 A${\mathrm{\r{}}}^{3}$, space group I112. Based on the resistivity, magnetization, critical-field, and specific-heat measurements, various parameters characterizing the monophase superconductors were determined or derived. Some of them are listed as follows: ${\mathit{T}}_{\mathit{c}\mathit{e}}$ (endpoint)=107 K, ${\mathit{T}}_{\mathit{c}\mathit{m}}$ (midpoint)=110 K, \ensuremath{\Delta}C (specific heat jump at 107 K)=5.3 J/mol K, \ensuremath{\gamma} (the Sommerfeld constant) =34.6 mJ/mol ${\mathrm{K}}^{2}$, FTHETA (Debye temperature)=418 K, ${\mathit{H}}_{\mathit{c}1}$(0)=900 G, ${\mathit{H}}_{\mathit{c}2}$(0)=184 T, and ${\mathit{J}}_{\mathit{c}}$(1.5 K, 0 T)=4.8\ifmmode\times\else\texttimes\fi{}${10}^{4}$ A/${\mathrm{cm}}^{2}$, etc. Morphology, thermal analysis, and pressure effects of the sample are also mentioned.
TL;DR: In this paper, a search for π 0 γ final states, in which the two photons from the Z 0 decay are unresolved, the production of pairs of high-energy electromagnetic clusters is studied.
Journal Article•
TL;DR: Percutaneous antegrade URS should be considered for the upper third of patients treated with ESWL in prone position and the applicability of open surgery was reduced to 17.8% in 1987 and 14.5% in 1988.
Abstract: Following the use of rigid ureteroscopic lithotripsy (URS) in 1984 and extracorporeal shock wave lithotripsy (ESWL) in 1987, the treatment for ureteral stones has undergone significant changes Our experience showed that the successful rate of URS for 132 patients was 894% and for the upper third was rather low, percutaneous antegrade URS should be considered 376 patients treated with ESWL in prone position with a successful rate of 968% The applicability of open surgery was reduced to 178% in 1987 and 145% in 1988
TL;DR: In this paper, the thermal stability of high-T c superconductor YBCO has been studied by using XPS and the results show that CuO can be readily reduced to Cu 2 O after heating at 400°C under high vacuum.