1,720,957 research outputs found
PRARANCANGAN PABRIK HEXAMETHYLENE TETRAMINE MENGGUNAKAN PROSES WOOD DAN STEVEN DENGAN KAPASITAS PRODUKSI 15.000 TON/TAHUN
No full textPrarancangan pabrik Hexamethylene Tetramine menggunakan bahan baku ammonia dan formaldehida. Ammonia diperoleh dari PT. Insoclay Acidatama Indonesia, sementara itu formaldehida dibeli dari PT. Dover Chemical. Pabrik ini beroperasi selama 330 hari/tahun dengan kapasitas produksi 15.000 ton/tahun.Perseroan Terbatas (PT) adalah bentuk perusahaan yang direncakan dengan menggunakan struktur garis dan staf. Jumlah tenaga kerja di dalam pabrik ini adalah 133 orang. Rencana pendirian pabrik di Kecamatan Grogol Kodya, Kota Cilegon, Banten dengan luas area 21.400 m2. Kebutuhan air untuk pabrik ini sebesar 63.982,831 kg/jam yang diperoleh dari sungai Cidanau. Jumlah listrik yang dihasilkan generator diesel sebesar 1,187 MW.Hasil analisa ekonomi yang diperoleh adalah sebagai berikut:1. Fixed Capital Investment = Rp. 358.041.506.484,-2. Working Capital Investment = Rp. 89.510.376.621,-3. Total Capital Investment = Rp. 447.551.883.105,-4. Total biaya produksi = Rp. 1.100.323.057.367,-5. Hasil penjualan = Rp. 1.281.607.169.724,-6. Laba bersih = Rp. 135.963.084.268,-7. Pay Out Time = 2,7 tahun (Metode Linear)8. Break Event Point = 46% (Metode Linear)9. Internal Rate of Return = 33,04% (Metode Cash Flow
SINTESIS DAN KARAKTERISASI KOMPOSIT HIBRIDA SERAT KELAPA DAN FLY ASH DIPERKUAT POLYESTER
No full textPemanfaatan suatu bahan baku yang berasal dari alam saat ini menjadi daya tarik untuk para peneliti. Serat kelapa dan fly ash merupakan bahan alam yang dapat dimanfaatkan sebagai bahan baku pembuatan material komposit. Serat kelapa dan fly ash sebagai material komposit masih memiliki kekurangan dalam sifat mekanik maupun sifat termailnya. Oleh karena itu, perlu adanya inovasi untuk meningkatkan sifat-sifat ini dengan coupling agent dan hibridisasi filler. Variabel bebas yang digunakan adalah rasio serat kelapa terhadap fly ash dan konsentrasi silane coupling agent. Rasio serat kelapa terhadap fly ash yang digunakan adalah (10:4, 7:4, 4:4, 4:7, dan 4:10 %wt), sedangkan konsentrasi silane coupling agent adalah 0 dan 5%. Berdasarkan analisa gugus fungsi, alkali dan silane treatment yang diberikan kepada serat kelapa mampu mengurangi kadar lignin dan hemiselulosa serta menambah gugus fungsi baru yaitu Si-O-C. Hasil tertinggi sifat fisik komposit hibrida diantaranya densitas, water absorption, dan thickness swelling berturut-turut sebesar 2,6123 g/cm3, 4,6595%, dan 7,4692x10-3%. Hasil tertinggi sifat mekanik komposit hibrida diantaranya tensile strength, tensile modulus, elongation, dan flexural strength berturut-turut sebesar 27,4649 MPa, 1,4264 GPa, 2,8999%, dan 113,7677 MPa. Sedangkan hasil sifat termal yang dilihat dari persen weight loss yang diperoleh dari setiap sampel menunjukkan hasil terbaik untuk pengaruh rasio sebesar 90,44% dan untuk pengaruh silane treatment sebesar 84,38%. Coupling agent dan hibridisasi filler, mampu meningkatkan sifat fisik, mekanik, dan termal dari komposit hibrida berpengisi serat kelapa dan fly ash
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
- …
