1,720,968 research outputs found
Ketahanan Beton Normal Terhadap Air Gambut Di Kota Palangka Raya: Normal Concrete Resistance to Peat Water in the City of Palangka Raya
No full textThe city of Palangka Raya has these peatlands spread across several regions including populated areas. This needs special attention in the world of concrete construction because the peatland has peat water with a high level of organic matter, low acidity (pH) which results in acidic water. The acidity of peat water will cause problems in concrete construction because it will affect the physical and mechanical properties of concrete which will make the concrete corrosive. This research method is by making 27 K-250 concrete samples, each of which three examples will be immersed in peat water, Kahayan river water, and tap water for one month, two months and three months. The results showed that the concrete soaked in peat water had the most significant decline compared to the concrete soaked in Kahayan river water and tap water, which was 8.798% of the planned concrete compressive strength of 250 kg / cm2 while the concrete with river water immersion decreased by 5.882% and tap water immersion 2.966% from the planned concrete compressive strength of 250 kg / cm2
Pemanfaatan Limbah Plastik Jenis PET (Poly Ethylene Terephthalate) Pada Pembuatan Beton Mutu Rendah Di Kota Palangka Raya
No full textPenelitian tentang pemanfaatan limbah plastik jenis PET (Poly Ethylene Terephthalate) terutama dalam bidang teknik sipil belum begitu banyak dilakukan di Palangka Raya. Padahal setiap hari di Palangka Raya, jenis limbah plastik ini cukup besar jumlahnya. Pengelolaan limbah jenis ini pun masih belum maksimal, sehingga sampah jenis ini dapat mengganggu lingkungan di Palangka Raya. Oleh karena itu perlu dilakukan penelitian agar limbah plastik tersebut dapat digunakan sebagai bahan bangunan teknik sipil dalam hal ini sebagai bahan campuran beton mutu rendah. Penelitian ini bertujuan untuk mengetahui apakah limbah plastik jenis PET (Poly Ethylene Terephthalate) dapat digunakan sebagai bahan campuran untuk beton mutu rendah di Kota Palangka Raya dan sejauh mana pengaruhnya terhadap kuat tekan beton mutu rendah. Penelitian ini menggunakan metode percobaan di laboratorium. Mutu beton yang direncanakan adalah K 225 yang termasuk klasifikasi beton mutu rendah. Pengujian dilakukan dalam 7, 14, dan 28 hari. Limbah plastik jenis PET sendiri akan digunakan sebagai bahan pengganti agregat kasar. Variasi penggunaan plastik jenis PET terhadap berat agregat kasar adalah 5%, 10% dan 15%. Jumlah sampel untuk masing-masing kondisi adalah 3 buah sampel, sehingga total sampel yang digunakan adalah sebanyak 36 buah. Nilai kuat tekan beton menurun seiring dengan penambahan kadar limbah plastik PET. Kuat tekan rata-rata untuk variasi campuran agregat kasar limbah plastik PET 0% (normal), 5%, 10%, dan 15% berturut-turut sebesar : 272,40 kg/cm2, 246,27 kg/cm2, 239,82 kg/cm2, dan 206,31 kg/cm2
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
Persamaan Nilai Korelasi Indeks Plastisitas (PI) Tanah Dengan California Bearing Ratio (CBR) Tanah Lempung Palangka Raya: Equation of Correlation Value of Soil Plasticity Index (PI) and California Bearing Ratio (CBR) of Palangka Raya Clay
No full textDuring this time to get the value of California Bearing Ratio (CBR) planners will conduct field tests and/or laboratory tests. This takes time and is relatively large. For this reason, it is needed a practical matter or formulation about the relationship between soil parameters so that planners do not need to test the overall soil parameters. This study aims to obtain a graph or correlation of the Plasticity Index (PI) with California Bearing Ratio (CBR) for clay soils in the Palangka Raya region. Clay soil samples were taken at 3 (three) locations in the City of Palangka Raya. Based on the results of tests on several samples obtained the largest CBR value in soil samples from Tangkiling village which reached a value of 6.56%. While the lowest CBR value obtained from the village of Kereng Bengkirai is 3.14%. For the PI value, the biggest value obtained in Bukit Rawi village is the largest, namely 20.54% and the smallest PI value obtained in Tangkiling village is 9.01%. In general, it can be concluded that the CBR value of clay is inversely proportional to the value of PI. Wherein it is known that the greater the CBR value, the smaller the PI value and vice versa. The overall correlation results of the PI value (plasticity index) to the CBR (California Bearing Ratio) obtain the correlation results using the linear graph CBR = -0.28383 PI + 8,9843. While the correlation value based on analytical calculations obtained CBR = -0,3006X + 9,0190. This test shows that the correlation value has a very high relationship when viewed from the benchmark correlation results (R = 0.80-1.00). The results of the correlation value using linear regression graphs worth R = 0.8489 and using analytical correlation methods worth R = 0.9283. So the final result of this study is to look for a relationship between PI values and CBR values. Then for the value of R is taken the smallest value that is R = 0.8489
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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