1,721,031 research outputs found
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
PENINGKATAN KEKUATAN SERAT SERABUT KELAPA DENGAN PERLAKUAN SILANE
Full text linkResearch is done to analyze treatment (physical and chemical) inincreasing quality of coir fiber. Sequential of coir fiber research is done withdetermining characteristic of physically coir fiber, methd of making single fiber, treatment technical and testing of strength. Determining of physically coir fiber characteristic is done by observing and measuring dimension directly and tesling water content. Then making of single fiber is done by selecting of coir fiber, washing, dryrng and brushing/shaving, Treatment of physically coir fiber is begun from coir fiber in outer shell of coconut to single fiber. Kind of physically treatment consists of washing, soaking, natural drytng and supervised drying. Iilashing and soahng use water. Nalural drying of ccir fiber is done wheit coir fiber is outer shell of coconut. Supervised drying is done with hot air in +45'C of tempemture. The next, washing, soaking and supervised drying is done to preryrecoir fiber that will be used to chemical treatment. Chemical treqtment is done with silane method. Silane treatment for single coirfiber is done with using silane agent solution. The silane solution is arranged with concentration variation 1%, 2%, 3%, 494up to l0%. Silane treatment uses methanol as solvent. Testing of single coir fiber is done accordingwith refer JIS number R7601 for single fiber. And testing of tensile shows that silane treatrnent will trend to increase strength. The increasing of coir strength andwill be optimum in concentration 7%o of silane agent.Key word: coirfiber, silane treatment, strengt
PENINGKATAN KEKUATAN SERAT SERABUT KELAPA DENGAN PERLAKUAN SILAI\ E
Full text linkResearch is done to analyze treatment (physical and chemical) in
increasing quality of coir fiber. Sequential of coir fiber research is done with
determining characteristic of physically coir fiber, methd of making single fiber,
treatment technical and testing of strength. Determining of physically coir fiber
characteristic is done by observing and measuring dimension directly and tesling
water content. Then making of single fiber is done by selecting of coir fiber,
washing, dryrng and brushing/shaving, Treatment of physically coir fiber is begun
from coir fiber in outer shell of coconut to single fiber. Kind of physically
treatment consists of washing, soaking, natural drytng and supervised drying.
Iilashing and soahng use water. Nalural drying of ccir fiber is done wheit coir
fiber is outer shell of coconut. Supervised drying is done with hot air in +45'C of
tempemture. The next, washing, soaking and supervised drying is done to preryre
coir fiber that will be used to chemical treatment. Chemical treqtment is done with
silane method. Silane treatment for single coirfiber is done with using silane agent
solution. The silane solution is arranged with concentration variation 1%, 2%, 3%,
494up to l0%. Silane treatment uses methanol as solvent. Testing of single coir
fiber is done accordingwith refer JIS number R7601 for single fiber. And testing of
tensile shows that silane treatrnent will trend to increase strength. The increasing
of coir strength andwill be optimum in concentration 7%o of silane agent.
Kqt word: coirfiber, silane tTeatment, strengt
ANALISA UNJUK KERJA BIODIESEL KAPUK RANDU
Full text linkThis research is carried out to analyze the production of ceiba petandra biodiesel and performance examination in diesel engine. Production of ceiba petandra biodiesel is carried out with transesterification method and alkali catalyst. Transesterification reaction uses methanol and NaOH catalyst. The performance examination is carried out with engine test bed. Engine test bed consists of diesel engine, generator, load and instrumentation. Production of ceiba petandra biodiesel by transesterification method shows the conversion of ceiba petandra biodiesel reaches 90% in condition 50oC – 55oC and material composition consist of 80% of ceiba petandra oil, 20% of methanol and 2 gram NaOH per 100 ml methanol. The performance examination in engine test bed with biodiesel of ceiba petandra shows efficiency reach about 20% to mixture of biodiesel B5 and B10. Key word: ceiba petandra, transesterification, biodiesel and efficiency
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
APLIKASI KOLEKTOR MATAHARI MODEL PLAT DATAR UNTUK PROSES PENGERINGAN
Full text linkPenelitian plat datar sebagai pengumpul kalor matahari dilakukan untuk menganalisa tingkat efektifitas penyerapan kalor dan aplikasinya untuk proses pengeringan. Tingkat efektifitas didasarkan pada bahan dan ukuran plat datar, pengaturan posisi, bahan yang dikeringakan, temperatur dan efisiensi. Perancangan alat pengeringan dengan kolektor matahari dilakukan di laboratorium dan pengujian unjuk kerja dilakukan dengan mengeringan salah satu produk makanan pada waktu siang hari dengan waktu efektif 5 jam. Dan berdasarkan hasil uji unjuk kerja prototipe plat pengumpul kalor dengan ukuran 2 mx 1,2 m x 3 mm menunjukkan bahwa temperatur di ruang kolektor dapat mencapai ±50oC.Key word: plat datar, pengumpul, kalor, temperatur, efisiensi, pengeringa
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