1,720,960 research outputs found
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
AERODYNAMIC & ELECTROMAGNETIC MODELING & ANALYSIS OF A VARIABLE TORQUE GENERATOR FOR WIND TURBINE APPLICATIONS
No full textThe use of a variable torque generator (VTG) with a movable stator relative to the rotor in the drivetrain of a wind turbine is investigated theoretically and computationally. This feature allows the use of a larger capacity generator in wind turbines to increase the rated power in high wind speeds and still keep them in operation in even lower than cut-in speed ranges. Thus, by harnessing more wind power throughout the entire power curve of the wind turbine, from the new cut-in speed to the cut-out speed, the efficiency of the wind turbine can be increased. The stator and the frame of the generator can be attached to a movable frame and changes in overlap can be mechanically achieved by a worm and worm gear system connected to the movable frame. Theoretical analyses together with computational methods on several wind turbine generators illustrate the advantages of having VTG feature in terms of decreasing the cut-in speed, increasing the rated power, and at the end improving the efficiency of a wind turbine. The aerodynamic and electromagnetic properties of the wind turbine are combined to make the best estimation on changing in overlap. At the end, simulation and mathematical results are presented and possible advantages of VTG with focus on on-shore wind turbine applications are discussed
Variable Electromotive-force Generators for Wind Turbines and Hybrid Vehicles, and Wind Tower Technology for Power Generation
No full textIn this dissertation, variable electromotive-force generators, and Wind Tower technology are developed as alternatives to current technologies in power generation and transportation system. Theoretical, experimental, and numerical studies of the generated electromotive force in the modified generator show the reduced torque loss of the generator and an increased rotational speed of the generator rotor by adjusting the overlap between the rotor and the stator. A simple and robust active control system is developed to adjust the overlap between the rotor and stator automatically and provide a stable output power that has less than 3% variations around its average values. This concept can improve the fuel efficiency of hybrid vehicles and increase the efficiency and expand the operational range of wind turbines. A novel multiple generator drivetrain configuration is developed at which a single-generator in a large wind turbine is replaced by multiple generators with the same or different rated powers. An electromagnetic clutch mechanism is employed to run the generators independently or together; this provides higher reliability and reduces scheduled maintenance and power loss especially at low input powers. A novel prototype is designed and fabricated; the system worked smoothly and the results show the possibility of running generators independently and together based on the input speed, using the electromagnetic clutch mechanism. A precise and accurate model for calculating the power and energy densities from measured wind speed data at an arbitrary site is developed to evaluate the potential of generating electricity using the wind power. In this regard, a novel ducted turbine, referred to as the Wind Tower technology, for capturing wind power and generating electricity in either residential or commercial scale applications is studied theoretically, experimentally and numerically. There is a good agreement between the estimated output power values from theoretical and experimental data. Also, the numerical simulation of the fluid flow inside the tower has provided an optimum dimension range of the Wind Tower components. The economic evaluation for designing and manufacturing a Wind Tower shows the potential of having cost reductions and a quick return on investment in areas with higher electricity rates
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
- …
