1,720,969 research outputs found
Analisa Tegangan Pada Rangka Prototype Kendaraan Buge Menggunakan Elemen Hingga
No full textAbstrak
Kendaraan roda tiga (Three Wheelers) adalah salah satu kendaraan dengan inovasi dan teknologi terbaru yang saat ini berkembang. Kendaraan roda tiga ini didesain berdasarkan konsep kendaraan roda tiga untuk stabilitas, keselamatan dan kemampuan pengendaraan maksimum dengan lebar total sekitar 1300 mm. Rancangan prototype ini memadukan konsep kendaraan buge dengan ATV,dimana suspensi bagian depan dirancang mengunakan dua shock breaker dengan lengan ayun di kiri dan kanan yang mampu bergerak dinamis layaknya ATV. Analsis pada rangka prototype kendaraan buge ini dilakukan dengan menggunakan finite elemen software. Tujuannya untuk mengetahui deformasi yang terjadi serta daerah kritis dan daerah aman pada rangka. Berat beban yang digunakan sebesar 1000 N yang merupakan berat penumpang 800 N dan berat mesin 200 N. Bahan yang digunakan adalah baja ST 42 dengan modulus elastisitas 200000 MPa, Poisson ratio 0.27, dan yield strength 415 MPa. Setelah proses analisis dilakukan, diperoleh tegangan von Mises maksimum (SMX) sebesar 78.518 MPa pada batang L46 (lengan ayun depan), Tegangan terendah (SMN) sebesar 0.079775 Mpa pada batang L22 (dudukan jok), defleksi yang terjadi (DMX) sebesar 3.745 mm, dan diperoleh faktor keamanan (safety factor) sebesar 5.285.
Kata Kunci: Rangka prototype kendaraan buge, Tegangan, metode elemen hingg
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
RANCANG BANGUN ALAT DEHYDRATOR BIOETANOL UNTUK MENGHASILKAN FUEL GRADE ETHANOL (FGE)
No full textABSTRAK
Bioethanol merupakan salah satu bahan bakar alternatif dengan sumber bahan baru yang dapat diperbarui. Bioethanol dapat menjadi bahan bakar alternatif bila mempunyai konsentrasi lebih dari 99% yang dikenal dengan nama Fuel Grade Ethanol. Proses pembuatan Fuel Grade Ethanol menggunakan metode pemisahan lanjut diantaranya adalah dengan metode distilasi azeotrop, pervorasi membran, dan adsorbsi. Tujuan dari penelitian ini adalah melakukan pengujian mesin dehydrator bioethanol yang bekerja dengan metode absorbsi. Mesin dehydrator ini menggunakan zeolit syntetis dengan ukuran 3 A yang sebelumnya telah dikembangkan. Pengembangan ini dilakukan melalui tiga tahapan, yaitu: (1) Tahap perancangan (desain) alat dehydrator biorthanol; (2) Tahap pembuatan alat dehydrator berdasarkan spesifikasi yang telah ditetapkan ; (3) Pengujian alat dehydrator yang berorientasi hasil yaitu bioetanol minimal berkadar sekitar 99%. Mesin destilator bioetanol yang telah dikembangkan mempunya spesifikasi sebagai berikut: dimensi tangki bahan baku tingginya adalah 250 mm dengan diameter 300 mm, Bagian tabung I terbuat dari pipa stainless steel dengan diameter 100 mm dan tinggi 600 mm. Tebal dari pipa tersebut adalah 2 mm. Tabung II terbuat dari stainless steel yang mempunyai diamater 100 mm dan tinggi 300 mm dengan ketebalan 2 mm. Kondensor berdiameter 100 mm dan tinggi 600 mm. Hasil penelitian ini menunjukkan bahwa mesin yang sudah dikembangkan ini mampu menghasilkan Fuel Grade Ethanol dengan kadar lebih dari 99%.
Kata kunci: dehydrator, bioethanol, fuel grade ethanol, bahan bakar alternatif
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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