1,721,141 research outputs found
F. Böckle, E.-J. Kaelin, H. Ruh, K. Stadler, Kirche im Umbruch der Gesellschaft , 1970
No full textThils Gustave. F. Böckle, E.-J. Kaelin, H. Ruh, K. Stadler, Kirche im Umbruch der Gesellschaft , 1970. In: Revue théologique de Louvain, 1ᵉ année, fasc. 4, 1970. p. 464
An automated digital image processing for film thickness measurements of EHL point contacts using white light interferometry
No full textInvestigation on Material and Dimension Effects in Elastohydrodynamic Lubricated Point Contacts
No full textFilm Thickness Analysis for EHL Contacts under Steady-State and Transient Conditions by Automatic Digital Image Processing
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Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Experimental investigation of Transient and Thermal Effects on Lubricated non-conformal Contacts
No full textIn this work thermal and transient effects on non-conformal lubricated contacts are investigated through experimental analyses. Experiments between a ball and a plane surface of a disc are described. Friction coefficients and film thicknesses are measured (the film thickness only for the glass-on-steel-contact). A paraffin base mineral oil is used as a lubricant.
First experiments are carried out under steady-state conditions. To include effects due to different thermal properties of contacting materials, a steel-on-steel and a glass-on-steel contact with different slide-to-roll-ratios are tested. If the contacting materials have different thermal properties, as in the case of a glass-on-steel contact, thermal effects like the temperature viscosity wedge action could clearly be shown. It is found that the friction coefficients are influenced by the slide-to-roll-ratio and the thermal properties of the contacting materials.
Under transient conditions the entraining velocity is varied with a sinusoidal law. Squeeze effects explain “loops” of friction- and film thickness found also in previous works. The formation of friction loops is related to the measured film thickness differences. However, also under non-steady-state conditions thermal effects like the temperature viscosity wedge action influence the friction coefficients
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