1,720,966 research outputs found
PEMANFAATAN ZEOLIT DAN SILIKA SEBAGAI MEMBRAN FILTRASI UNTUK MENURUNKAN TSS,COD DAN WARNA LIMBAH CAIR BATIK
Full text linkSalah satu penyebab pencemaran badan air adalah pembuangan limbah cair
indusri yang tidak sesuai dengan baku mutu secara langsung ke badan air. Salah satu
industri yang menghasilkan limbah cair adalah industri batik. Industri batik yang
merupakan industri tekstil memiliki kadar total suspended solid (TSS), chemical
oxygen demand (COD) dan warna yang memerlukan pengolahan sebelum dibuang ke
badan air. Salah satu teknologi pengolahan adalah menggunakan membran filtrasi.
Untuk memperkecil biaya pembuatan membran dan meningkatkan masa pakai
membran filtrasi maka digunakan zeolit dan silika sebagai bahan pembuat membran.
Variabel penelitian ini adalah perbandingan massa penambahan silika, kecepatan
centrifuge pada pembuatan membran dan konsentrasi limbah cair batik yang akan
diolah. Pengujian kinerja membran dilakukan dengan reaktor cross flow untuk
meminimalkan biaya operasi sedangkan karakterisasi membran dilakukan dengan
menggunakan uji scanning electron microscope (SEM), energy dispersif x-ray (EDX)
dan kuat tarik. Analisa penelitian menggunakan data paremeter penelitian yaitu TSS,
COD dan warna, nilai rejeksi dan nilai fluks membran. Nilai rejeksi TSS, COD dan
warna pada membran dengan massa penambahan silika 3%, 600 RPM dan
konsentrasi limbah 100% adalah 89,9 %; 72,86 % dan 92,68% sedangkan penurunan
nilai fluks terkecil diperoleh pada membran dengan massa penambahan silika 3%,
kecepatan centrifuge 600 rpm dan pengujian pada konsentrasi limbah cair batik 75%
sebesar 1-7%. Membran dengan nilai rejeksi yang paling besar dan penurunan nilai
fluks yang paling kecil adalah membran dengan massa penambahan silika 3% dan
kecepatan centrifuge 600 rpm. ========== One of the causes of surface water pollution is industrial wastewater disposal directly
into water bodies. One of the industries that produce wastewater is batik industry.
Batik industry is the textile industry had higher levels of total suspended solid (TSS),
chemical oxygen demand (COD) and colors that require treatment before being
discharged into surface water. One such technology is membrane filtration. To
minimize the cost of making the membrane and increase the lifetime of the membrane
filtration then used zeolites and silica as the material for the membrane. The variables
of this study is the mass of addition silica, centrifugation speed in the manufacture of
the membrane and the concentration of batik wastewater. Testing the performance of
the membrane is done with cross flow reactor to minimize operating costs while
membrane characterization performed using scanning electron microscope (SEM),
energy dispersif x-ray (EDX) test and tensile strength. Analysis of research studies
using the data parameter is TSS, COD and color, rejection and flux value of
membrane. Rejection value of TSS, COD and color on the membrane with a mass
addition of silica 3%, 600 RPM and 100% effluent concentration is 89,9%; 72,86%
and 92,68%, while the smallest decrease in the flux values obtained in the membrane
with the addition of silica 3% mass, centrifugation speed of 600 rpm and testing on
effluent concentration batik 75% of 1-7%. Membrane with a rejection of the greatest
value and impairment of the smallest flux is membrane with a mass addition of 3%
silica and centrifugation speed of 600 rpm
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
Efektivitas Penyisihan Kadar BOD Limbah Cair Pengolahan Ikan Menggunakan Tanaman Melati Air (Echinodorus Palaefolius) Dengan Sistem SSFCWS
No full textFish processing liquid waste is waste that contains organic material from fish
processing activities that have the potential to pollute the environment if the
resulting waste is not treated properly and correctly. This research was
conducted to determine the efficiency of removal of BOD levels by Phytotreatment using water jasmine (Echinodorus palaefolius), and the effect of the
number of plants on BOD levels of fish processing wastewater. Sampling was
carried out in the fish processing industry in Pasuruan, East Java. The research
stages started from preliminary research, the phyto-treatment process, and
data analysis using Two-Way ANOVA. Plant acclimatization with
concentrations of 0%, 25%, 50%, 75%, and 100% fish processing
wastewater with water jasmine (Echinodorus palaefolius) gradually for 18
days. Phytotreatment was carried out using a waste concentration of 75% for
20 days to determine the decrease in BOD levels. Based on the results of the
analysis, it can be concluded that water jasmine (Echinodorus palaefolius) can
absorb organic matter in wastewater treatment with BOD removal efficiency of
77% respectively. The results of statistical tests carried out showed that the
weight of water jasmine (Echinodorus palaefolius) had a significant effect on
BOD levels
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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