Showing papers by "Eindhoven University of Technology published in 1983"
TL;DR: A new [0] algorithm for the detection of the termination of a distributed computation and to demonstrate how the algorithm can be derived in a number of steps is presented.
428 citations
TL;DR: In order to eliminate organic pollutants in waste gases, a biological filter bed technique has been developed, with a high self‐regenerating capacity and a low pressure drop, which enables the prediction of the elimination capacity of the filter bed.
Abstract: In order to eliminate organic pollutants in waste gases, a biological filter bed technique has been developed, with a high self-regenerating capacity and a low pressure drop. The bed consists of an appropriate filling material (mainly peat compost), in order to let the microorganisms grow on the solid surface and to supply them with inorganic nutrients. Most organic compounds are oxidized to carbon dioxide and water. The compositions of the solid phase and the viable organisms present are such that aging is prevented, as a result of which a relatively high activity can be maintained during a long period of time (years). Experiments have been carried out in laboratory-scale columns with composite gas mixtures at varied concentrations and superficial gas velocities. The (macro) kinetics of the elimination processes have been studied, which enables the prediction of the elimination capacity of the filter bed.
413 citations
TL;DR: In this paper, the activities of sulfided MoC, WC, CoC, NiC, Co-MoC, and Ni-WC catalysts for thiophene hydrodesulfurization and butene hydrogenation were studied using a flow microreactor operating at atmospheric pressure.
300 citations
TL;DR: In this article, the authors explored the due-date performance of job shop control systems which base job due dates on a time-phased representation of the workload and the machine capacity in the shop.
Abstract: This study explores the due-date performance of job shop control systems which base job due dates on a time-phased representation of the workload and the machine capacity in the shop. The performance is measured by the mean and the standard deviation of the lateness. Two parameters are used to vary the functioning of the due-date assignment system: a minimum allowance for waiting, denoted by SL, and a maximum fraction of the available capacity allowed for loading, denoted by CLL. The system increases the waiting lime allowance if congestion is observed when loading a new job. The capability of the system to observe congestion is determined by the parameters CLL and SL.
Simulation experiments are used to investigate the performance of the assignment system. It is shown that the assignment system performs quite well with respect to reducing the standard deviation of the lateness; the performance is not very sensitive however to the parameter values used; with an expected capacity utilization of 90%, CLL should be set between 0.80 and 1.00 times the mean available capacity and SL should be set between 0.55 and 0.90 times the mean operation waiting time in the shop.
The assignment system may also perform well with respect to controlling the mean lateness. If SL is set between 0.55 and 0.75 times the mean expected waiting time in the shop, a constant mean lateness is obtained independent of the utilization of the shop if CLL is set between 0.70 and 0.80 times of the mean available capacity. However, the mean lateness turns out to be quite sensitive to variations in the job-mix of the workload. Finally it is shown that if the values of the assignment parameters are adequate, the mean job lateness is independent of the number of operations in a job. This property can be used to monitor the correctness of the parameter values.
154 citations
TL;DR: In this paper, the X-ray photo-electron spectra of NiMn2O4, NiZnO4 and Mn3O4 are reported, showing that the shift and broadening of the Mn-2p, Mn-3s, and Mn-4p lines in NiN 2O4 compared with those of the other compounds, are indicative of the change distribution Ni 2+ 1−ν Mn 2+ ν [Ni 2+
151 citations
TL;DR: In uniaxial tensile experiments in vitro mechanical properties of the different parts of porcine aortic valves, the leaflets, the sinus wall and the aorts, have been dealt with and predictions based upon the model indicate that on cyclic loading the larger viscous losses have to be expected in the leaflets.
144 citations
TL;DR: Oligomerization reactions of ethene, propene, isobutene, and 2-methyl-butene-1 on zeolite H-ZSM-5 at 300 and 373k were investigated using high-resolution solid-state 13C-NMR spectroscopy as discussed by the authors.
139 citations
TL;DR: In this paper, the effect of electroosmosis on the relative sharpness of the zone boundaries and hence the detection limit in isotachophoresis was discussed, and a high concentration and a low pH of the leading electrolyte were found to be favourable.
132 citations
TL;DR: In this paper, the tensile behavior at 20 DegC of polystyrene (I) [9003-53-6]-glass bead composites was studied at glass concns.
Abstract: The tensile behavior at 20 DegC of polystyrene (I) [9003-53-6]-glass bead composites was studied at glass concns. from 0 to 25 vol.%. To gain insight into the role of interfacial adhesion, the bonding between glass and I was varied by using different silane coupling agents [Z-6032 [34937-00-3] and CH2:CHSi(OEt)3 [78-08-0]]. In contrast to the elastic behavior, the crazing behavior (i.e., the crit. applied tensile strength for craze formation at beads) of the composites was considerably affected by the degree of interfacial adhesion. This is explained by different mechanisms for craze formation at adhering and nonadhering glass beads, resp. Both elastic and crazing behavior of the composites were influenced by the glass bead concn
117 citations
TL;DR: By selecting adequate parameter values, both a constant mean lateness and a small variance of lateness can be obtained with this type of assignment rule, and these results are valid for both types of release situations.
107 citations
TL;DR: In this paper, an XPS investigation of Pt and Rh supported on γ-Al 2 O 3 and TiO 2 was performed in order to establish the differences in metal-support interactions.
TL;DR: Comparative tensile and relaxation experiments have been performed with strips taken from porcine aortic valve tissue in a fresh condition and after the treatment, and the elastic behaviour of the Hancock leaflet strips confirms that of the tissue strips treated under 0.3 N, while the viscoelastic behaviour differs somewhat.
TL;DR: In this article, the growth of α-Ni(OH)2 during cathodic deposition from Ni(NO3)2 electrolyte was followed ellipsometrically; a transparent film is formed with refractive index n−ki=1.41±0.03−0i (λ=546.1 nm).
TL;DR: Oligomerization and cracking reactions of ethene, propene, and isobutene on zeolite H-ZSM-5 (300 ≤ T < 600K) were investigated using temperature-programmed adsorption and desorption experiments, high-resolution 13C-NMR spectroscopy, and gas Chromatographic product analysis.
TL;DR: In this article, a theoretical framework is constructed to explain quantitatively analyte and argon excited level densities in inductively-coupled plasmas and an essentially new description of the discharge is proposed in terms of partial LTE and the saturation regime.
TL;DR: The final author version and the galley proof are versions of the publication after peer review and the final published version features the final layout of the paper including the volume, issue and page numbers.
Abstract: • A submitted manuscript is the author's version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published version of record. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher's website. • The final author version and the galley proof are versions of the publication after peer review. • The final published version features the final layout of the paper including the volume, issue and page numbers.
TL;DR: In this article, the authors investigated the kinetics of the oxygen reduction on cobalt phthalocyanine and found that, at low cathodic overpotential, hydrogen peroxide is the stable reaction product, only at more negative potentials is it partially reduced further to water.
TL;DR: In this paper, the authors investigated the role of interfacial adhesion in the formation of craze in polystyrene-glass bead composites subjected to a uniaxial tension.
Abstract: The craze formation in polystyrene-glass bead composites subjected to a uniaxial tension has been investigated. To gain insight into the role of interfacial adhesion, the bonding between glass and polystyrene was varied by using different silane coupling agents. The distributions of several craze formation criteria around an isolated adhering glass sphere in a polystyrene matrix have been computed with the aid of the finite element analysis. It was found that the mechanism for craze formation is fundamentally different for adhering and non-adhering glass beads. In the case of excellent interfacial adhesion the crazes form near the poles of the beads in regions of maximum dilatation and of maximum principal stress. With poor interfacial adhesion the crazes form at the interface between pole and equator. It is proposed that in the latter case craze formation is preceeded by dewetting along the phase boundary.
TL;DR: A calculation of the evaporation from the observed radio-wave scintillation yields good agreement with calculations based on the Priestley-Taylor formula.
Abstract: The determination of the evaporation from scintillation measurements at several wavelengths is discussed. The refractive-index structure parameter Cn2 derived from the observed amplitude scintillation on a 30-GHz radio link is compared to a spot measurement of this quantity at a much lower height than that of the radio link. After free convection height scaling, a difference of a factor of 3 is found. This factor is discussed. A calculation of the evaporation from the observed radio-wave scintillation yields good agreement with calculations based on the Priestley-Taylor formula.
TL;DR: The mechanism of the polymerization of ethene over chromium oxide/silica catalysts was investigated by in situ infrared measurements of the catalyst after D 2 activation, CO adsorption, or polymerization as discussed by the authors.
TL;DR: In this paper, cyclic voltammetry and ellipsometry were applied to investigate the growth and nature of the anodic oxide film on nickel in 0.1 M KOH.
TL;DR: It is proved that rather tight upper bounds can be given for the number of non-unique assignments that are achieved after solving the linear programming relaxation of some types of mixed integer linear assignment problems.
TL;DR: In this article, it is shown that the state of an ICP plasma can be adequately described by a measured electron density distribution, even though the plasma is not in full local thermal equilibrium (LTE).
TL;DR: An alternative derivation of the Feynman-Hellwarth-Iddings-Platzman (FHIP) result for the impedance function of a polaron is presented in this paper.
Abstract: An alternative derivation is presented of the Feynman-Hellwarth-Iddings-Platzman (FHIP) result for the impedance function of a polaron. In the present calculation only simple operator techniques are used. The FHIP result is worked out in such a way that we are able to identify which scattering processes are incorporated. The inverse problem is also solved.
TL;DR: In this paper, a theoretical model is introduced that describes the recovery of different classes of organic compounds as a function of the process time, and the effect of variations of some process factors predicted theoretically are in good agreement with the experimental results.
TL;DR: Quantitative determination of galanthamine is performed with normal-phase liquid chromatography using a mixture of dichloromethane--n-hexane and ethanolamine as an eluent and Phenacetin is used as internal standard.
TL;DR: A rapid and sensitive method for the determination of cyclophosphamide and 5-fluorouracil and some of their metabolites in one analysis has been developed using Surface-coated open-tubular OV-275 columns combined with electron-capture detection and nitrogen-phosphorus selective detection.
01 Jan 1983
TL;DR: An introduction to trace theory and to regular trace structures in particular is presented and it is shown how trace theory can be used to reason about and to prove properties of hierarchical components.
Abstract: The relevance of trace theory to the design of VLSI circuits is discussed. We present an introduction to trace theory and to regular trace structures in particular. We show, in a number of examples, how trace theory can be used to reason about and to prove properties of hierarchical components.
TL;DR: In this paper, a detailed description of the kinetics of oxygen reduction in alkaline solution on cobalt phthalocyanine film electrodes is proposed, where the central metal atom of the electrocatalyst releases an electron to the adsorbed reactant, which is subsequently further reduced to products (HO 2 − and OH − respectively).
TL;DR: A submitted manuscript is the version of the article upon submission and before peer-review as mentioned in this paper, while a published version is the final layout of the paper including the volume, issue and page numbers.
Abstract: • A submitted manuscript is the version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published version of record. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher's website. • The final author version and the galley proof are versions of the publication after peer review. • The final published version features the final layout of the paper including the volume, issue and page numbers.