1,720,957 research outputs found
The Effect of Coil and Spark Plug Variation on Emission, Power and Torque on Vixion 150
Full text linkThe development of technology in vehicles continues to be developed to meet human needs and be environmentally friendly. One technology that is still being developed is the use of spark plugs and coils. The function of spark plugs in motorized vehicles is to spark sparks caused by the electric voltage generated by the coil. Various kinds of coil produce different high voltage. This research uses a Yamaha Vixion 150 CC, 1 cylinder, four-stroke motorcycle. The research was conducted by providing spark plug and coil variations including standard U24ESR-N (Denso) spark plugs, 0.4mm Iridium spark plugs, and Brisk Silver spark plugs. Coil variations were also given including 3C1 H2310 spark plugs and Uma Racing spark plugs. The data taken includes a comparison of emissions produced, torque, and power. The highest power at RPM 8500 was generated by the U24ESR-N spark plug (Denso) with the use of the Uma Racing coil type of 8.69 kW. Spark plug and coil variations will also determine torque. The highest test on the use of Uma Racing coil and Brisk Silver spark plug at 6500 RPM engine speed produces a value of 9.35 Nm. The results also show changes in emissions produced such as CO2, CO, HC, and O2 emissions. The use of 0.4mm Iridium spark plugs with 3C1 H2310 coil and Brisk Silver spark plugs with 3C1 H2310 produces high voltage resulting in higher CO and HC gas productio
Analisa Kekerasan Permukaan Baja ST 40 Setelah Carburizing Dengan Luas Rata-rata Partikel Karbon 115,103 μm² DAN 515,735 μm²
Full text linkCarburizing is a steel hardening technique by adding carbon to the steel with austenite temperature. The purpose of this research is to look at changes in microstructure that occur as well as changes in the value of surface hardness in steel.
This research uses ST 40 steel and carbon with 115.103 μm² and 515,735 μm² carbon particles. Steel and carbon are put into a container, tightly closed and heated at 780 ° C for 4 hours. Carburizing specimens testing include carbon particle analysis, microstructure test and vickers hardness test.
After the carburizing process, there was a reduction in the area of carbon particles from 115,103 μm² to 110,051 μm² and 515,735 μm² to 440,058 μm². in microstructure testing, ferrite is alpha (α) while pearlite is symbolized (β). Raw material produces an average solubility of elements in Fe (β%) 5.99%. The solubility of the carburizing material with a carbon size of 515,103 μm² was 14.19%. Solubility of the carburizing material with a carbon size of 115.103 μm² by 23,49%. In hardness testing, raw material produces 263.3 kg/mm² hardness. Carburizing uses an average area of 115.103 μm carbon particles resulting in a hardness of 249,68 kg / mm², while carburizing uses an average area of carbon particles 515.735 μm² producing a hardness of 193.7 Kg / mm²
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Full text link“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
Full text linkWe 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
Full text linkWe 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
- …
