Showing papers by "Hyun-Chul Kim published in 1992"
TL;DR: It is demonstrated that based on the graph model all the linear recursive formulas can be classified into a taxonomy of classes and each class shares common characteristics in query compilation and query processing.
Abstract: The authors present a graph model which is powerful in classifying and compiling linear recursive formulas in deductive databases. The graph model consists of two kinds of graphs: I-graph and resolution graph. Essential properties of a recursive formula can be extracted from its I-graph, and the compiled formula and the query evaluation plan of the recursive formulas can be determined from its resolution graph. It is demonstrated that based on the graph model all the linear recursive formulas can be classified into a taxonomy of classes and each class shares common characteristics in query compilation and query processing. The compiled formulas and the corresponding query evaluation plans can be derived based on the study of the compilation of each class. >
15 citations
TL;DR: In this paper, the backscattering of a plane acoustic wave from an air-filled Zircaloy-4 nuclear fuel cladding tube in water is analyzed as a function of k 1 a using the resonance scattering theory.
8 citations
15 Jun 1992-Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment
TL;DR: In this paper, the construction procedures and performance of the AMY barrel electromagnetic shower counter used for an e+e− colliding beam experiment at TRISTAN are described and compared.
Abstract: We describe the construction procedures and performance of the AMY barrel electromagnetic shower counter used for an e+e− colliding beam experiment at TRISTAN.
6 citations
TL;DR: In this article, the Fe(II) or Fe(III) complex and the Fe (II)/Fe(III), mixed-valence complexes of o, o '-dihydroxyazobenzene (DHA) were prepared by mixing DHA with methanolic solutions containing FeCl 2 and FeCl 3 in various molar ratios.
5 citations
TL;DR: In this article, pre-and post-scission multiplicities of proton and α particle have been measured in the reactions of 19 F + 181 Ta, 197 Au, 208 Pb and 28 Si + 197 Au.
4 citations
TL;DR: In this article, the proton energy spectra are found to be sensitive to the residue mass, and a simple Serber-like model for breakup-fusion reproduces the data well.
2 citations
Journal Article•
2 citations
01 Dec 1992
TL;DR: The average beam polarization for this set of Z decays was 22.6% and was measured to be 0.004(syst.). From this measurement, the weak mixing angle defined at the Z boson pole is determined to be sin{sup 2{theta}{sup eff}{sub W} = 0.0005 as discussed by the authors.
Abstract: The SLAC Linear Collider (SLC) has been modified to collide a longitudinally polarized electron beam with the unpolarized positron beam. We review the beginning of polarized beam running at the SLC, and report on the measurement of the left-right cross section asymmetry (A{sub LR}) made with a sample of 10,224 Z decays collected over the course of the 1992 run. The average beam polarization for this set of Z decays was 22.4 {plus_minus} 0.6%(syst.). A{sub LR} was measured to be 0.100 {plus_minus} 0.044(stat.) {plus_minus} 0.004(syst.). From this measurement, the weak mixing angle defined at the Z boson pole is determined to be sin{sup 2}{theta}{sup eff}{sub W} = 0.2378 {plus_minus} 0.0056 {plus_minus} 0.0005.