1,720,998 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
Development of a Tendon Driven Variable Stiffness Continuum Robot with Layer Jamming
Full text linkRobotics has transformed the live of human beings significantly in numerous ways. Among all categories of robotics, soft robot is probably the most intriguing and promising realm of robotics research. Compared with traditional robots featuring rigid-body components, soft robots have compliant and continuum structures. Soft robots tend to have a greater dexterity, and they are capable of navigating through tortuous paths or bypassing obstacles by adjusting the robotic shape to reach spots where conventional robotic arms cannot access. However, there exist several flaws of continuum robots with respect to lack of stiffness and load carrying capacity. To solve these inherent issues with continuum robots, previous research has already explored the application of layer jamming to improve the rigidity and load carrying capacity of one arm segment which can achieve motion within a 2D plane. The purpose of this research is to design, fabricate and test a tendon driven a continuum soft robot with three modular segments, each of which has a tunable stiffness enabled by layer jamming technology. Compared with previous studies, the robotic arm design of this project has a modular structure, which means the length of the robotic arm can be adjusted by addition of extra arm modules/segments to the existing robotic prototype. Furthermore, the new arm prototype supports motion within a 3-dimensional space. To achieve the goals, the design and fabrication for the variable stiffness robotic arm with compliant main structure and layer jamming mechanism has already been finished. Design and fabrication of the connector has also been finished to integrate several link modules into one robotic arm with multiple segments. The actuator located at the base of the arm has already been designed and tested. Finally, a stiffness test of one arm segment was conducted to verifying the load carrying capacity of the variable stiffness robotic arm, then the stiffness ratio of the layer jammed structure was calculated to analyze the stiffness improvement compared with unstiffened soft robot.No embargoAcademic Major: Mechanical Engineerin
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
Design of a Gecko Adhesive Climbing Robot
Full text linkEngineering: 1st Place (The Ohio State University Denman Undergraduate Research Forum)I present, ACROBOT, a gecko-adhesive enabled robot that can climb surfaces in any gravitational orientation or operate in full zero gravity. The robot is being developed as a prototype for inspection applications aboard the International Space Station (ISS) where current voids in inspection coverage both inside and outside the station pose risks to the vehicle. A specific area of interest for inspection is a narrow gap, approximately 1.5 inches wide, behind internal equipment racks. The prototype robot uses oppositional pairs of gecko adhesive pads that turn adhesion ON and OFF using an applied shear load. The robot is currently tele-operated and utilizes an inchworm style gait. The robot can turn in a tight circle, fits within a 1.5 inch gap, and can transition between orthogonal surfaces. Gecko adhesives leave no residue, are highly reusable, and create strong adhesion in vacuum and across a wide temperature range. The robot design and initial experimental results are presented including climbing vertical walls in Earth's gravity.NASA Jet Propulsion Laboratory (JPL)NASA JPL Extreme Environment Robotics Group (PI: Dr. Aaron Parness)Academic Major: Mechanical Engineerin
Design, Modeling, and Fabrication of a Flapping Wing Micro Air Vehicle
Full text linkThe purpose of this research is to design and fabricate a flapping wing micro air vehicle (MAV) using compliant mechanisms and shape deposition manufacturing (SDM). A compliant mechanism is a device that transfers motion, force, or energy and gains at least some of its mobility through the elastic deformation of flexible members. This allows for a reduction of parts and weight, low friction and maintenance, and high precision. Shape deposition manufacturing is a rapid prototyping technology for building up material layers to form complex-shaped, multi-material, embedded-component structures. It allows for lower-cost, near net shape fabrication. A preliminary design was created and analyzed using kinematic software to determine the mechanism’s functionality and the overall structure’s ability to maintain flight. The prototype was fabricated using shape deposition manufacturing, but was not functional due to an error in the design calculations. Changes were made to the design and a second prototype was fabricated. The second prototype is currently not functional due to a problem with the motor. Design iterations will continue to improve the design and once a functioning prototype is produced, the MAV will be tested to determine how much lift it can produce. Experiments will be conducted with different wing designs to find optimal lift performance. If successful, this could lead to a new approach used by designers around the world.No embarg
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