1,720,954 research outputs found
Design of a silo steel support structure
No full textV magistrskem delu je opisano konstruiranje jeklenega podstavka za silos, kjer se skladišči cement ali pepel. V sklopu dela smo predstavili uporabljene standarde Evrokod iz katerih smo določili postopek izračuna obremenitev na silos in analitično kontrolo konstrukcije. Izdelali smo 3D-model in izvedli numerično analizo konstrukcije v programu Ansys, kjer smo dobili rezultat za maksimalen pomik konstrukcije 21 mm in maksimalno napetost v konstrukciji 288 MPa, kar ustreza mejnim vrednostim. Z analitičnim izračunom smo pokazali, da so projektne tlačne napetosti v stebrih konstrukcije nižje od projektne nosilnosti na uklon in izbočitev in sicer 3,22-krat nižje pri uklonu in 1,37-krat nižje pri izbočitveni nestabilnosti.The master\u27s thesis describes the design of a steel support structure for a silo used to store cement or ash. It presents the Eurocode standards that define the calculation methods for the loads acting on the silo and the analytical verification of the structure. A 3D model of the silo support was created, and a numerical analysis of the structure was carried out using Ansys. Among other results, the analysis showed a maximum displacement of 21 mm and a maximum von Mises stress of 288 MPa, both of which are below their respective limit values. Analytical calculations demonstrated that the design compressive stresses in the columns of the structure are lower than the design column (global) buckling resistance and the design plate (local) buckling resistance—specifically, 3.22 times lower for column buckling and 1.37 times lower for plate buckling
Analysis of water droplet freezing on a superhydrohobicsurface
No full textV diplomski nalogi smo z IR kamero opazovali proces zmrzovanja kapljic treh različnih volumnov (1 µl, 10 µl in 50 µl) na hidrofobni in referenčni površini. S spreminjanjem električnega toka smo spreminjali moč hlajenja Peltierjevega elementa in s tem hitrost ohlajanja površine oz. zmrzovanja vodne kapljice. Ugotovili smo, da je v povprečju čas ohlajanja kapljic na hidrofobni površini 85 s, na referenčni pa 52 s, kar je 38 % daljše ohlajanje na hidrofobni površini. Celoten proces zmrzovanja poteka na hidrofobni površini v povprečju 26 % dlje glede na referenčno. Volumen kapljic prav tako vpliva na čas zmrzovanja, saj večje kapljice potrebujejo več časa za zamrznitev. V povprečju je bil proces zmrzovanja pri 10-µl kapljicah 356 % in pri 50-µl kapljicah 1077 % daljši glede na 1-µl kapljico. Z IR kamero smo tudi pri 200 Hz posneli proces rekalescence 10-µl kapljice.In the thesis, we used an IR camera to observe the freezing process of droplets of three different volumes, 1 μl, 10 μl and 50 μl, on a hydrophobic and a reference surface. By varying the electric current, we varied the cooling power of the Peltier element and thus the rate at which the surface cooled or the water droplet froze. We found that on average the droplet cooling time on the hydrophobic surface is 85 s and on the reference surface 52 s, which is 38% longer cooling on the hydrophobic surface and the whole freezing process takes on average 26% longer on the hydrophobic surface compared to the reference surface. The volume of the droplets also affects the freezing time, as larger droplets take longer to freeze. On average, the freezing process was 356% longer for 10 μl droplets and 1077% longer for 50 μl droplets compared to 1 μl droplet. The IR camera was also used at 200 Hz to record the recalescence of a 10 μl droplet
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
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe 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
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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