1,720,972 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
Time-accurate computational fluid dynamics modeling of the LHA ship airwake
No full textExtensive research in the past two decades has shown that flow around the sharp edges of bluff bodies, such as the superstructure of a ship, can cause large scale shear-layer separations with increased turbulence, generating a highly unsteady flow in the airwake region. Such separations affect the control margins and handling loading of a rotorcraft, mainly if operating from the vicinity of a flight deck, and therefore negatively influence the rotorcraft operating limits. Improved Delayed Detached-Eddy Simulations (IDDES) of the ship airwake were conducted with three different grid levels, the highest being the largest computation to date of the US Landing Helicopter Assault (LHA) ship. Computations were undertaken using the open-source unstructured grid Navier-Stokes CFD software OpenFOAM. Results detail the mean flow and discuss highly-detailed vortical structures and inherent unsteadiness of the LHA ship airwake. Understanding these vortical structures is critical to enabling safe helicopter operations around such vessels
Heat and mass transfer process in exhaust wet scrubber
No full textAn exhaust wet scrubber was experimentally investigated based on the heat transfer analysis for gas-liquid two-phase flow. Different inlet operating conditions for gas phase such as temperature 24- 650 ºC, 113.3 standard litre per minute flowrate and 5 mm orifice plate holes were tested. The purpose of the orifice plate is to break bubbles into smaller ones, leading to more heat transfer due to the increase of the bubble surface area. Moreover, bubble motion is recorded using a high-speed video system. An image processing software (ImageJ) is processed both images and videos effectively to track bubbles, remove image noise, and set image threshold. Bubble dynamic and thermal parameters and non-dimensional numbers were calculated using MATLAB program. The measured parameters will be used to develop a heat transfer model for the wet scrubber
Conceive — Design — Implement — Operate (CDIO): A Case Study in Undergraduate Engineering (Wind Energy Course) at DTU
Full text linkAs a result of a mismatch between the skills of the newly trained engineers and the needs of industry, a new approach called Conceive —Design —Implement —Operate (CDIO) has been designed for producing the next generation of engineers [1]. CDIO is a structured approach to how and when the students acquire technical science / engineering and general / personal competencies, which takes place simultaneously through lectures and projects.At the Technical University of Denmark (DTU), we have, since 2008, joined a network a large number of international universities and implemented the framework to develop a new undergraduate CDIO-based program1. The efforts are made in order to transform from an authoritarian teacher-based learning to a student-centered counterpart thereby achieving an active, life-time learning experience for the students.The course “Design-Build 2: Wind Energy Harvesting” aims at getting students engaged in a problem-based engineering project to design and build wind turbine blades in order to achieve the most efficient conversion rate of the wind into electrical energy. We have been running the course two times, having a diverse student background ranging from life science to mathematics backgrounds as well as diverse nationalities. This article presents our observations in implementation of the CDIO technique in student activation and satisfaction. Challenges in facing “lost students” and implementing the technique correctly are being discussed and advantages in student activation are analysed. In addition to acquiring strong academic knowledge, it is shown that through various steps of the 3-weeks course period, students develop both personal, social and professional skills that are important for their upcoming professional career
A comparison of a modified curvilinear approach for compressible problems in spherical geometry and a truly spherical high-order method
No full textDispelling 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
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