118,501 research outputs found
Panorama du tour du lac, où du lac en face de Clarens
No full textF[ritz] Huguenin L[assauguette]; Lith. H. Furrer, NeuchâtelFarbige LithographieLinks, unten: "Les chiffres indiquent l'altitude en mètres"Als Beilage erschienen in: Rambert, Montreu
OKA process evaluation
No full textprepared by: Carrie Furrer, Ph.D., Beth L. Green, Ph.D.This archived document is maintained by the State Library of Oregon as part of the Oregon Documents Depository Program. It is for informational purposes and may not be suitable for legal purposes.Mode of access: Internet from the Oregon Government Publications Collection.Text in English
Investigations of connection detailing and steel properties for high ductility doweled timber connections
No full textAccording to Eurocode 8 moderate to high dissipative behaviour of timber structures requires sufficient ductility
of the critical regions. Earlier experiments on timber connections with slotted-in steel plates and laterally loaded
common steel dowels rarely achieved high ductility values. Connections consisting of LVL-C members, doweltype
fasteners with different post-elastic steel properties, full confinement of the timber member and measures
to restrain the notch effect were investigated by means of monotonic and cyclic tests with regards to the
displacement ductility. The measures taken proved to be effective in enhancing the plastic deformation capacity
of the steel dowels to a large extent. However, a new aspect was observed: the constriction of the dowels in the
contact area with the plate. The research results provided a better understanding of the factors influencing the
behaviour of slotted-in steel plate connection
Entity recognition in the biomedical domain using a hybrid approach
No full textBackground: This article describes a high-recall, high-precision approach for the extraction of biomedical entities from scientific articles. Method: The approach uses a two-stage pipeline, combining a dictionary-based entity recognizer with a machine-learning classifier. First, the OGER entity recognizer, which has a bias towards high recall, annotates the terms that appear in selected domain ontologies. Subsequently, the Distiller framework uses this information as a feature for a machine learning algorithm to select the relevant entities only. For this step, we compare two different supervised machine-learning algorithms: Conditional Random Fields and Neural Networks. Results: In an in-domain evaluation using the CRAFT corpus, we test the performance of the combined systems when recognizing chemicals, cell types, cellular components, biological processes, molecular functions, organisms, proteins, and biological sequences. Our best system combines dictionary-based candidate generation with Neural-Network-based filtering. It achieves an overall precision of 86% at a recall of 60% on the named entity recognition task, and a precision of 51% at a recall of 49% on the concept recognition task. Conclusion: These results are to our knowledge the best reported so far in this particular task
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
Evaporating flow experimental tests in small square open channels
No full textThe evaluation of the liquid evaporating flow rate in heat pipe arteries (i.e.Transfer heat flux) can be improved if the flow behavior inside these channels of very small sizes is better studied. In this paper, experimental tests performed in small square section open channel (4 mm side), in horizontal configuration, aiming at visualizing and analyzing the steady evaporating flow are presented. The channel size is not as small as the usual size used for heat pipe, and the characteristic length (width of the groove) is then larger than the water capillary length (about 2.7 mm), thus gravity force being predominant on capillary force. For this reason, although present results will not add specific and newer details about the liquid flow in the arteries (microchannels) of the heat pipes, they in any case extend the already available experimental data concerning the performance evaluation in small open ducts. In the initial cold conditions of the tests, before heating, no driving force acts and liquid fills the channel at a certain level without flowing in it. When evaporation starts, the liquid begins to flow both by driving capillary and gravity pressure axial gradient inside the channel. Then, according to the established steady evaporation rate, the liquid differently flows and fills the channel sections. The apparatus and the visualization devices used in these tests allow to take pictures of the gas-liquid interface (meniscus) at several positions along the channel for different steady evaporating rate (supplied heat flux). Images are processed using an appropriate software, ĝ€ImageJĝ€and the interfacial meniscus radius and liquid height along the channel are measured. The values of these two parameters allow the estimation of the liquid filling rate (fluid saturation), the capillary and gravity pressure gradients and the mean axial liquid speed in the channel. So, although gravity effects are present in these experiences, the above measured values and the maximum sustainable heat flux, are compared to the predictions of the analytical and numerical solutions performed in the study of R.H. Nilson, S.W. Tchikanda et al., in the case of no driven gravity pressure gradient (Gĝ- Combining double low line 0). © 2016 Elsevier Masson SAS. Visualization with high-speed camera is used to analyze liquid flow behavior in an open channel.Liquid meniscus is obtained from image processing of visualization.Evaporation rate in the evaporator is evaluated.Comparison between experimental data and available models is accomplished. © 2016 Elsevier Masson SAS
Capillary pressure influence on open channels pressure drop
No full textThe evaluation of the liquid pressure drop in the heat pipe arteries can be improved if the flow behavior inside these channels of very small sizes is better studied. In this paper experimental tests performed with a small square section open channel (side of 4 mm) aiming to visualize and analyze the liquid flow are presented. The channel size is not as small as the usual size used for heat pipe and the characteristic length (width of the groove) is then larger than the water capillary length (about 2.7 mm), thus gravity force being predominant on capillary force. For this reason, although present results will not add specific and newer details about the liquid flow in the arteries (microchannels) of the heat pipes, they in any case extend the already available experimental data concerning the pressure drop evaluation in small open ducts. Actually, the aim of the present series of tests is to easily acquire familiarity and to better observe the phenomena that similarly exist in channels of much smaller size. An aspect due to the capillary pressure generated at the gas-liquid interface (free surface of the open channels) is its influence on the measurement of the liquid pressure drop due to viscous effects. The apparatus and the visualization devices used in these tests allowed to take pictures (images) of the gas-liquid interface (meniscus) at several positions along the channel. Images have been processed using appropriate software called "ImageJ" and the interfacial meniscus radius and liquid height along the channel have been measured. The values of these two parameters allowed the estimation of the liquid viscous pressure drop and the friction factor. © 2013 Elsevier Masson SAS. All rights reserved
Square Dancing with the Stars to Enhance Dynamic Hirschman Linkages?
No full textIn this Presidential Address, the author takes the reader on a reconnaissance of his life and time as a regional scientist. He points out scenery he found scintillating along the way, hoping that some may pick up the banner and chew on a few of the ideas for a while. He suggests a revisit to Albert O. Hirschman’s notion of key sectors and more empirical analysis related to Marcus Berliant’s and Masahisa Fujita’s notion of knowledge creation and transfer.Presidential Address, San Antonio, Texas, March 29, 2014 (53rd Meetings of the Southern Regional Science Association
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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