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Eksperimen Beton Mutu Tinggi Berbahan Fly Ash Sebagai Pengganti Sebagian Semen
Get PDFVarious research in concrete sector has been done as an effort to increase quality of concrete, materials and method, materials technology and implementation techniques obtained from the results of the experiments and experiments are intended to answer the increasing demands on the use of concrete and overcome the constraints that often occur in the implementation of work in the field. One way to increase the strength of concrete is to use a cement replacement that is fly ash.The purpose of this research is to know the influence of partial cement replacement effect with fly ash to the concrete compressive strength, in order to be applicated for rigid pavement in road design. The variations of composition in the addition of fly ash is 0%, 10%, 12.5%, 15%, 20% and 25% of the weight of cement. Concrete compressive strength is 40 MPa and tested at 7 days and 28 days. This research tested concrete with cylinder test object (diameter 150 mm and height 300 mm) with 30 sample and consist of 6 variation. From this research, optimum compressive strength at 10% variation is 30,770 MPa. The lowest compressive strength is in the 25% variation with 20,046 MPa.The highest compressive strength obtained from the research is 30.770 Mpa
Perencanaan Tebal Perkerasan Kaku Dengan Beton Mutu Tinggi (Menggunakan Fly Ash)
No full textBerbagai penelitian dan percobaan dibidang beton dilakukan sebagai upaya untuk meningkatkan kualitas beton, teknologi bahan dan teknik-teknik pelaksanaan yang diperoleh dari hasil penelitian dan percobaan tersebut dimaksudkan untuk menjawab tuntutan yang semakin tinggi terhadap pemakaian beton serta mengatasi kendala-kendala yang sering terjadi pada pelaksanaan pekerjaan di lapangan. Salah satu cara untuk meningkatkan kekuatan beton adalah dengan menggunakan pengganti semen yaitu abu terbang. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh penggantian sebagian semen dengan abu terbang terhadap mutu kuat tekan beton dalam aplikasinya pada perencanaan tebal perkerasan kaku dengn beton mutu tinggi. Komposisi variasi penambahan abu terbang sebanyak 0%, 10%, 12,5%, 15%, 20% dan 25% dari berat semen. Mutu beton yang direncanakan 40 MPa yang diuji pada umur 7 hari dan 28 hari. Penelitian ini menguji beton dengan benda uji selinder (diameter 150 mm dan tinggi 300 mm) sebanyak 30 sampel dan terdiri dari 6 variasi. Dari penelitian ini didapatkan kuat tekan optimum pada variasi 10% yaitu sebesar 30,770 MPa. Kuat tekan yang terendah terdapat pada variasi 25% yaitu sebesar 20,046 MPa.Kuat tekan tertinggi yang didapat dari penelitian yaitu 30,770 MPa kemudian digunakan dalam perencanaan tebal perkerasan kaku metoda Bina Marga. Perkerasan kaku yang direncanakan berlokasi di STA 0+000 - STA 5+000 Bypass Kota Padang. Dari hasil perhitungan tebal perkerasan didapatkan tebal slab beton adalah 210 mm dengan jenis beton bersambung dengan tulangan. Total anggaran biaya yang dikeluarkan dari perencanaan tebal perkerasan kaku ini adalah senilai Rp.41.200.700.000,00 (Empat Puluh Satu Milyar Dua Ratus Juta Tujuh Ratus Ribu Rupiah).
 
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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