1,721,072 research outputs found
Manipulated wettability of a superhydrophobic quartz crystal microbalance through electrowetting
No full textThe liquid phase response of quartz crystal microbalances (QCM) with a thin coating (~9 µm) of epoxy resin with and without a carbon nanoparticles top layer is reported. The nanoparticles convert the epoxy surface to a superhydrophobic one with a high static contact angle (~151º-155º) and low contact angle hysteresis (~1º-3.7º) where droplets of water are in the suspended Cassie-Baxter state. The frequency decrease of the fully immersed QCM with the superhydrophobic surface is less than with only epoxy layer, thus indicating a decoupling of the QCM response. A wettability transition to a liquid penetrating into the surface roughness state (for droplets a high contact angle hysteresis Wenzel state) was triggered using a molarity of ethanol droplet test (MED) and electrowetting; the MED approach caused some surface damage. The electrowetting induced transition caused a frequency decrease of 739 Hz at a critical voltage of ~100 V compared to the QCM in air. This critical voltage correlates to a contact angle decrease of 26º and a high contact angle hysteresis state in droplet experiments. These experiments provide a proof-of-concept that QCMs can be used to sense wetting state transitions and not only mass attachments or changes in viscosity-density products of liquids
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
Letter re: editorials
No full textLetter from Grady B. Harris to Amon Carter supporting Carter in his battle with Harold Ickes.Chief Editor Fort Worth TX 4/28/40 Mr. Amon Carter Esq. 1430 Elmwood St. Dear Sir: Tell the 'Blue bellies" to go to hell; you damn right we are gonna defeat this 'foreign advised' regime. The damn yankees even jumped me up. The very day (last Sat) I left for Houston to work - I didn't have it here and I am a master mechanic - the F.B.I. agent a Mr. Wolk called mother (she is 70 has heart attacks, and I left her alone) and stated "he was looking for me" I got wind of it and when I got back he called me stating "it is about a working blue print of a machine gun you drafted" I told him I had (illegible) away the blue print several years ago, and if he had it someone burglarized my files to get it. Well he wanted me to come to his office at his hours even if it did break into my time. I also told him I had started a deal (prior to Russia-(illegible) war) to sell several eletrical devices of my own invention, to Russia; I ommitted to tell him the truth in full. That I didn't have a damned fit of confidence in Washington Patent Officials. I submitted the magneto-compass to the Washington crowd April 1929; it turned up in General Electrics' hands. Figure that double cross! I challenged for a toe to toe technical duel; but not a peep out of that yankee crowd. That challenge still holds, I can prove it with documents I have hidden away. I wish you would consult with Gonzallus about allowing me to carry some heavy artillery; I am not afraid to use it. By God I guess I am an American, my father was an educated Scott and mother a Bavarian, they have relatives back over a hundred years. Very Sincerely, Grady B. Harris. If we don't keep the yankees out of (illegible) offices, well we will be sleeping and eating with niggers. Come to think of it Bill McCloud (illegible) inyour employ knows what kind of citizens we are; ask him about us. Ernest Wood - patent atty will subastantiate my statement about magneto-compass. Observe these church affiliations - race equality is what they are preaching
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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