1,721,329 research outputs found
Komposisi Karawitan"Gejolak Asmara"
No full textKomposisi Karawitan"Gejolak Asmara"
Karya Heru Windarto, Ujian penyajian Karawitan, Pendapa ISI Surakart
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
HIGH PRECISION FLUXGATE CURRENT SENSOR
Full text linkNowadays the necessity to measure currents in the industrial worlds has been growth to the most important
tools for proceedings controls. The classical approach of measuring current is by using a resistor and measuring the voltage
drop across it. This method is fine for small currents however when the current levels increase to large values, it becomes
more difficult. This is because the power dissipation in the resistor increases with the current squared.
One solution for measuring large currents is by not directly measuring the current, but by measuring a property which
is directly related to the current. By measuring the magnetic field around a conductor, the current level can be accurately
predicted. Fluxgate current sensor uses a high permeability magnetic core to detect magnetic fields produced by a current flow
through a conductor. Prodrive B.V. develops and uses a sensor with one fluxgate winding. However there is a disadvantage
presented by this structure, that is the possibility of noise and ripple injection on the primary current measurement.
In this final project, a second fluxgate winding was used to cancel the induced spurious signal on the sensing resistor.
The targeted specifications of the new design are spurious signal up to 50μArms, noise performance up to 50nA/sqrt(Hz) and
new operating switching frequency at 15kHz.
Key Words: Fluxgate, Current Sensor, Second Fluxgate Winding, Spurious Peak, Noise
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
급속압축팽창장치를 이용한 스파크 방전효과에 따른 LPG엔진의 착화 및 배출가스 특성에 관한 연구
No full textA study on the spark discharge effect on ignition and emission characteristics of LPG engine using RCEM Department of Mechanical Engineering Cahyani Windarto A spark ignition strategy in compression ignition has been considered to achieve high performance and reduce pollutant emissions of direct injection engines. It is challenging to optimize the operating parameters of spark discharge duration effect of the internal combustion engine. The potential improvement in in-cylinder performance and emission characteristics of CI engines fueled with gasoline, diesel and propane mode was investigated in an experimental and simulation series in this study. Analyzing the novel technique of liquid fuel injection is worthwhile given the potential for high-efficiency compression ignition engines to achieve marine diesel-like, high-efficiency combustion in a RCEM research engine. The spark ignition energy depends on the discharge current and the spark discharge duration. Since propane has a low cetane number, spark plug operating is provided to achieve reliable ignition. However, the respective roles of both on the rapid compression and expansion machine (RCEM) running with spark ignition and gasoline direct injection in- cylinder pressure have not been fully investigated. The effects of spark release duration on propane direct injection were studied using experiments and simulation on a modification head of large-bore RCEM using three spark ignition strategies. The validated model CFD was applied to study the combustion and emission of propane as well as the spatial distribution of propane in the research engine. The main objective was to determine how high-pressure direct injection of propane can increase the efficiency of CI engines and reduce particulate and standard emissions. Three spark ignition strategy ranging from 50 mA up to 200 mA is applied to enhance the ignition discharge energy according to six selected cases of ignition timing duration (0.7 ms, 1.0 ms, 2.0 ms, 3.0 ms, 4.0 ms, and 5.0 ms). The emissions reduction was realized with DI-propane combustion compared to diesel combustion. Propane produces fewer particulates than diesel. THC and NOx emissions from diesel vehicles were 1.8% lower and 32.3% higher, respectively, than propane combustion. It is feasible to decrease NOx, particulate, and unburned fuel pollutants while maintaining CO2 emissions at levels comparable to a diesel engine. Both the onset of propane injection and the length of ignition timing have been shown to be optimum factors in emissions and performance. Finally, the establishment of a compression ignition engine combined with spark energy discharge might contribute to faster plasma formation, as well as expose the kernel development to a wider range of spark duration. Keywords: RCEM; spark discharge energy; computational fluid dynamics; in-cylinder performance; direct injection; propane; emission.Docto
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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