1,720,964 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
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
KAJIAN KOROSI PADA MESIN PERKAKAS AKIBAT PERBANDINGAN COOLANT (PENDINGIN) YANG TIDAK SEIMBANG
Full text linkOne of the effort to lessen worn-out of tool machine is used by spraying coolant (mixture water and oil). Beside that dilution of coolant also function to slow down the rate of corrosion. But practically often arise damage ahead of schedule, so that old age to wear appliance become shorter. This research was conducted to dilution of coolant made with mixture irrigate faucet with oil and pure water mixture (aquades) with oil, were in the reality obtained that dilution of coolant aqueous of quicker faucet of its process of him from at using pure water. This matter was caused by pregnant faucet water of metal minerals able to form salt when mixed with oil, so that will quicken rustiness process. Later; Then for the variation of different composition in the reality more and more oil longer process rustiness happened. The corrosion at tool machine during the time was caused usage of faucet water to make dilution of coolant and also composition making of dilution of coolant imprecise
Kajian Potensi Air Pengerak Pompa Hidram untuk Mengairi Sawah di Daerah Pakandangan Kabupaten Padang Pariaman
Full text linkEnergy is needed in mobilizing a mechanism both electric energy and energy derived from fossils. Hydram pump is a device to raise water from a low place to a high place by utilizing water impacts without using renewable energy. In Pakandangan, Padang Pariaman Regency, there is a water source that cannot be utilized to flow through the rice fields around 10 Ha. Because the rice fields are higher with water sources. The methodology is to survey the location and design the dimensions of the hydram pump. The results obtained head data height of incoming water is 2.5 meters, the height of water lift to the shelter is 7 meters the flow of water entering the pump is 25 lt / sec. The dimensions of the pump are the result of the design of a hydram 1 size with an inside diameter of 2 inche
Perbandingan Penggunaan Cairan Pendingin Radiator Terhadap Temperatur Kerja Mesin Mobil Toyota Avanza 1.5 S M/T
Full text linkThe increasing economic growth of the Indonesian people has implications for the number of vehicle ownership, especially cars. However, this increase is not matched by public understanding of the need for maintenance of the engine cooling system. One way that can be done is to use radiator coolant to maintain the cooling system so that engine performance remains in optimal condition. The purpose of this study was to determine and compare the working temperature of the engine when using several types of radiator coolant. This research uses an experimental approach research method. The test was carried out at 750 RPM, 1500 RPM, 3000 RPM and using a coolant containing a mixture of water with ethylene glycol 0%, 30%, 50% and 80%. In the calculation, it is found that the working temperature of the Toyota Avanza 1.5 M/T car engine is very good using a mixture of water and ethylene glycol 50%, namely with an average engine working temperature of 94.8℃, then a mixture of water and ethylene glycol 30%, namely with an average temperature engine working 96.3℃, a mixture of water and ethylene glycol 80%, with an average working temperature of 98.6℃ engine and a mixture of water and ethylene glycol 0%, with an average working temperature of 101.5
Turbin Crossflow untuk PLTMH di Sungai Karuah, Kelurahan Lambung Bukit, Kec Pauh, Padang
Full text linkUtilization of electrical energy has been applied in almost all fields of life. One of them is the use of electricity to repel plantation pests. In the hills of Batu Busuk, around the Padang Karuah River, Kel Lambung Bukit, Kec. Pauh, Padang is one of the communities that has implemented the application. The people who are gardening there have worked together in making a Micro Hydro Power Plant (PLTMH) type waterwheel with a power of 1 kW with the current condition has been damaged and can not be used anymore. Seeing the potential of water owned according to the results of the field survey with a flowrate of 100 L / s and a head of 5 m, the use of crossflow turbines is one type of turbine that is suitable for replacing a windmill that has been damaged with a power generated of 3.7 kW. The crossflow turbine has an outer diameter of runner (D1) 0.3 m, runner width (L) 0.2 m and the number of blades (z) 28 pieces. With the use of the crossflow turbine, the potential of water will be maximally utilized
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