1,720,957 research outputs found
Makrostruktur dan Permukaan Patah dalam Uji Tarik Terhadap Perlakuan Panas pada Baja Karbon Rendah
Get PDFBaja karbon rendah kekuatan tinggi memperlihatkan kombinasi yang baik dalam kekuatan dan keuletan yang menarik perhatian dari berbagai penelitian. Tujuan dari kajian ini adalah untuk menyelidiki dan mempelajari dalam analisa mikrostruktur dan perilaku permukaan patah pada tensile properties dengan variasi temperatur pada baja dual phase. Sebelumnya,bahan telah di austenised pada temperatur 1000°C selama 30 menit dan diikuti dengan water quench untuk menghasilkan full martensit pada specimen. Kemudian bahan di anneal dalam kawasan interkritikal untuk mendapatkan 20, 50 dan 80% a’. Mikrostruktur baja dual phase setelah di annealing pada daerah dual phase dan water quenching, kekerasan baja dual phase ini meningkat dengan seiring meningkatnya vol.% martensit. Disamping itu, volume % martensit yang dihasilkan adalah lebih banyak dari pada ferit.Perubahan tegangan dan regangan lebih tinggi/meningkat dari pada kondisi 20% dan 50%. Dari kondisi pengujian tarik ini dapat disimpulkan bahwa dengan meningkatnya vol.% martensit maka tegangan maupun regangan bahan meningkat.Kekerasan bahan meningkat dengan meningkatnya %vol. martensit, ini terlihat bahwa kekerasan baja Cu adalah lebih tinggi dari baja base.Kata Kunci : Uji Tarik, Mikrostruktur, Baja Karbon Rendah dan Perlakuan
Pengaruh Posisi Terhadap Kekuatan Baut dan Gaya Geser Ditinjau dari Morfologi Fracture Surface pada Sambungan Plat
No full textBolt extension as link which do not destroy connective by component at process unload tide used many in so many industrial area like at bridge construction, building construction and various appliance of engine tool. Usage of amount 3 (bolt fruit three) at 5 (standard hole five) at one particular extension construction can be seen at tacking on two plate with bevel form at building roof construction. If usage more at one particular construction extension hence will have an in with wide of section, apart between hole at each bolt as well as its esthetics value. Formation arrange situation an bolt extension at one particular construction very having an effect on to failure of extension construction, is in this case done conducted by examination to an extension construction by 3 bolt fruit at 10 position differ from the target of searching optimal position in accepting style shift at bolt extension construction used by bolt is galvanic type have full of thread to. Is later got by tension value shift at each bolt and got by optimal position (strong position) and weak position from 10 existing position in accepting style shift [at] extension construction. Optimal position in this experiments are position 2 and 4. The position not optimal is position 6. Keywords: fracture surface, bolt , optimal position of bolt, deformation
Briquette of Empty Fruit Bunch Fiber as an Alternative Substitution for Binderless Fuel Methods
Get PDFBiomass development has been a key issue for the past few decades and will remain attractive in the future because of its cleanliness, renewability, carbon neutrality, and other advantages. This study aims to determine the optimal holding time for heating system briquettes by testing the heating value of empty fruit bunches fibers. The process of this research involves the use of one unit of briquette molding equipment by providing a heating system to the mold cylinder. Fibers were manually finetuned until they reached a size of 20 mesh (0.84 mm). Densification temperature is an essential factor that could affect the combustion properties, especially the calorific value. The Arduino program is used for setting the heating resistance time of the mold, which is 15, 20, and 25 min at a temperature of 200 ºC, and the thermal controller is used to adjust the temperature variation. Results showed that the highest calorific value of the three varieties of holding time was at 25 min with a calorific value of 4480.2 cal/g, and the lowest cost at 15 min was 4022 cal/g. Meanwhile, a calorific value of 4432.5 cal/g was found at 20 min. This finding is due to the low moisture content and high charcoal content of the sample in the 25 min briquette mold. Therefore, briquettes at 25 min have a higher heating value compared with those at 15 and 20 min holding time
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
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