Showing papers by "University of Cyprus published in 1993"
TL;DR: This paper showed that the commonly used Stone index approximation can bias the parameter estimates of the almost ideal demand system and that the bias mostly affects the price parameters and can be more serious when the budget share equations are estimated with individual household rather than aggregate data.
Abstract: This paper shows that the commonly used Stone index approximation can bias the parameter estimates of the almost ideal demand system. The bias mostly affects the price parameters and can be more serious when the budget share equations are estimated with individual household rather than aggregate data. In the absence of strong substitution effects, the price parameter bias can be largely corrected through simple reparameterization. Copyright 1993 by Royal Economic Society.
200 citations
TL;DR: In this paper, the search for an additional heavy gauge boson Z′ is described, and the models considered are based on either a superstring-motivated E6 or on a left-right symmetry and assume a minimal Higgs sector.
36 citations
TL;DR: In this paper, the authors search for lepton flavour violation in Z boson decays into lepton pairs using all data collected with the L3 detector during the 1990, 1991 and 1992 runs on an event sample corresponding to 1 500 000 Z's produced.
36 citations
TL;DR: In this paper, a measurement of R b = Γ b b Γ had from Z → q q events at LEP is reported, which is based on a multidimensional analysis using a neural network approach.
34 citations
TL;DR: In this article, the authors report on inclusive xc production in Z decays reconstructed via the decay mode Xc → J + γ using 1.1 million hadronic Z events and obtain a branching ratio Br(Z→ Xcl + X) = (7.5±2.9(stat.) ± 0.6(sys.)) × 10−3.
31 citations
TL;DR: Champion Irrigation Products as discussed by the authors employed the principles of cellular manufacturing in its operations, which resulted in reduction in work-in-process inventory and materials movement, increase in quality, and simplification of production, planning and control procedures.
Abstract: Champion Irrigation Products is a company which has started to employ the principles of Cellular Manufacturing in its operations. Undertakes the task of examining the applicability of Cellular Manufacturing at the company by using several methods for cell formation. Describes the design and implementation phase of the application, along with the obstacles encountered and solutions provided. Benefits realized from the application of Cellular Manufacturing at Champion Irrigation Products include reduction in work‐in‐process inventory and materials movement, increase in quality, and simplification of production, planning and control procedures. The success of the application lies in the fact that management at Champion Irrigation Products did not view Cellular Manufacturing as a mere rearrangement of the factory floor, but as a starting‐point for the continuous questioning of its practices, with the goal of improving the manufacturing function.
22 citations
TL;DR: In this paper, a systematic bias of the Z mass due to the γZ interference term is detected, which leads to an underestimation of the error on mZ for model independent determinations.
20 citations
27 Sep 1993
TL;DR: This work examines the dependence of performance on the width of the balancers used in constructing counting networks on shared-memory multiprocessor machines and the extent to which concurrent processors access the same memory location at the same time.
Abstract: Implementing counting networks on shared-memory multiprocessor machines often incurs a performance penalty proportional to the depth of the networks and the extent to which concurrent processors access the same memory location at the same time. In this work, we examine the dependence of performance on the width of the balancers used in constructing such networks.
17 citations
TL;DR: In this paper, the effect of different parameters such as metal loading, method of preparation and heat treatment temperature are also observed on the reducibility of the catalysts, and it is observed that reduction temperature increases with the increase of calcination temperature.
Abstract: Nickel oxide promoted catalysts are prepared by simple precipitation, precipitation from homogeneous solution and impregnation methods and their reduction behavior is monitored with temperature programmed reduction (TPR) technique. The effect of different parameters such as metal loading, method of preparation and heat treatment temperature are also observed on the reducibility of the catalysts. It is observed that reduction temperature increases with the increase of calcination temperature. Results indicate that the interactions between nickel oxide and silica begin with the increase of calcination temperature which leads to the formation of nickel hydrosilicates and are responsible for high temperature reduction peaks.
13 citations
TL;DR: In this paper, the search for the electromagnetic penguin decay b → sγ at √s ≈ mz was conducted and no evidence for a signal was found and an upper limit on the decay rate Br(b→ sγ) < 1.2 × 10−3 at 90% C.L.
12 citations
TL;DR: The average lifetime ofB hadrons has been measured by the TASSO collaboration using 110 pb−1 of data collected in 1986 at a center of mass energy of 35 GeV using three different methods and a method ofB-enrichment is discussed.
TL;DR: In this paper, a comparison of isolated hard photon production in hadronic Z decays with the predictions of a next-to-leading order matrix-element calculation was made, and the results were consistent with standard model predictions.
TL;DR: In this article, four and six-element conforming domain decomposition techniques for Chebyshev spectral collocation methods for Poisson problems in rectangular domains were developed for standard test problems.
Abstract: Four and six-element conforming domain decomposition techniques are developed for Chebyshev spectral collocation methods for Poisson problems in rectangular domains. The applicability of the methods is demonstrated on standard test problems.
TL;DR: In this paper, a high resolution adsorption (HRADS) technique was used in both the continuous and static modes to determine the isotherms of nitrogen (at 77K) on various porous carbons and silicas.
Abstract: A high resolution adsorption (HRADS) technique was used in both the continuous and static modes to determine the isotherms of nitrogen (at 77K) on various porous carbons and silicas. Excellent agreement has been obtained with the corresponding adsorption data determined with a conventional volumetric technique. The advantages and limitations of HRADS measurements are discussed and the isotherms are analysed by the αs-method. The results provide new evidence for the three stages of pore filling.
01 Mar 1993
TL;DR: In this article, the authors present three-loop results in lattice gauge theories, for the Free Energy and for the Topological Susceptibility, which are an outcome of a scheme which was developed (using a symbolic manipulation language), for the analytic computation of renormalization functions on the lattice.
Abstract: We present some new three-loop results in lattice gauge theories, for the Free Energy and for the Topological Susceptibility. These results are an outcome of a scheme which we are developing (using a symbolic manipulation language), for the analytic computation of renormalization functions on the lattice.
TL;DR: In this article, the authors identify central design goals for information-acquisition interactions between an expert system and its user, including mixed-initiative interaction, flexibility in user input, and system competence in querying the user.
Abstract: Expert systems are consultative, highly interactive systems, and hence the quality of interaction between system and user is important for the acceptability of the system. Acquisition of data about the problem in hand is a central feature of the interaction between system and user, and it makes a major contribution to the user's perception of the system. It is therefore crucial that the acquisition of this data (both as individual data items and as a sequence of data inputs) is perceived by the user as competent.
This paper identifies central, domain-independent, design goals for the information-acquisition interactions between an expert system and its user, including mixed-initiative interaction, flexibility in user input, and system competence in querying the user. The paper discusses the realisation of these goals in a diagnostic expert system, Skeletal Dysplasias Diagnostician, through an explicit data model which allows for the representation of data with temporal and spatial (locality) aspects and the decide-status function which operates on the data model.
TL;DR: In this paper, it was shown that the systems obtained when imposing the boundary conditions in the boundary bordering sense and when satisfying them using a basis recombination formulation are equivalent under certain conditions.
01 Jan 1993
TL;DR: In this article, two ways of assessing mesoporosity, namely mercury intrusion porosimetry and from isothermal nitrogen adsorption data, are discussed, and the limitations of each technique and the range of pore size distributions for which each one is most valid are discussed.
Abstract: This paper discusses two ways of assessing mesoporosity, namely mercury intrusion porosimetry, and from isothermal nitrogen adsorption data. Each technique will be discussed, and the way information obtained will be described. The limitations of each technique, and the range of pore size distributions for which each one is most valid will be discussed. The interpretation of adsorption data will be discussed briefly, together with the various types of hysteresis, and their interpretation. Low pressure hysteresis, and the non-closure of the hysteresis loop will be presented.
TL;DR: In this article, it was shown that the Lawrence-doniach free energy for layered superconductors can be derived from an anisotropic Ginzburg-Landau free energy with a spatially dependent coefficient for the quadratic term.
Abstract: We show that the Lawrence-Doniach free energy for layered superconductors can be derived from an anisotropic Ginzburg-Landau free energy with a spatially dependent coefficient for the quadratic term. Our derivation indicates that new terms are present as well, including couplings of the gradients of the order parameters of neighboring layers. These terms tend to make the sign of the order parameters alternate from layer to layer, and may cause a phase transition in the presence of magnetic fields normal to the layers.
01 Feb 1993-Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment
TL;DR: In this paper, the authors describe the upgrade of the L3 detector for running at the LHC and the principle goals are the precise measurement of electrons, photons and muons.
Abstract: We describe the upgrade of the L3 detector for running at LHC The principle goals are the precise measurement of electrons, photons and muons
TL;DR: In this article, the mixing angle sin 2 θ w is determined from several independent measurements: the leptonic and hadronic cross sections, the forward-backward asymmetries of charged leptons and b-quarks, and the τ-polarization.
TL;DR: In this paper, the free energy of SU(N) gauge theories on the lattice, to three loops, was calculated and combined with Monte Carlo data for the average plaquette, giving a more precise estimate of the gluonic condensate.
Abstract: We calculate the free energy of SU(N) gauge theories on the lattice, to three loops. Our result, combined with Monte Carlo data for the average plaquette, gives a more precise estimate of the gluonic condensate.
TL;DR: In this paper, the hadronic lineshape of the Z has been analyzed for evidence of signals of new, narrow vector resonances in the Z-mass range, and no evidence for new states is found, and it is thus possible to exclude, at the 95% confidence level, a quarkonium state in the mass range from 87.7 to 94.7 GeV.
TL;DR: In this article, the effect of heat treatment and cation uptake on the textural characteristics of hydrous oxides was investigated and it was suggested that water plays a key role in stabilizing the microporous textures.
Abstract: Nitrogen adsorption studies were carried out on zirconia gels prepared through the agency of ammonium carbonate to zirconyl chloride solutions. The effect of heat treatment and cation uptake on the textural characteristics of such hydrous oxides was investigated. The freshly prepared gels as well as those heat treated at 110°C were found to be microporous. After the uptake of the Co 2+ and Ca 2+ cations the microporosity prevailed with the development of more extensive surface areas and pore volumes. It is suggested that water plays a key role in stabilizing the microporous textures. Primary and secondary mechanisms of micropore filling seem to take place in most of the gels.