1,721,189 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
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
An Affordable, Autonomous, Open Source UAS for Real-Time Marine Life Detection and Nearshore Data Collection to Aid in Safety and Conservation Efforts
No full textTo reduce costs and be more effective at locating and tracking sharks we have developed an un-manned aerial system (UAS) to supplement or replace the spotter planes currently in use in Massachusetts. The system surveys predetermined regions and collects visible band imagery and infra-red (IR) temperature data. Onboard edge devices detect sharks, boats, and humans (87% [email protected]) and transmit the information back to a ground station for conservationists and beach safety personnel. Synchronous collection of thermal and image data enables the generation of geo-referenced sea surface temperature (SST) maps and shoreline erosion models. The UAS reduces costs by 90% compared to traditional methods and operates without the need for trained operators. Building off previous research, the system integrates various components into a single comprehensive shoreline surveying solution to aid in safety and conservation efforts
Automated Thermal Imaging Inspection of Solar Fields
No full textUtility-scale solar is growing across the globe due to the increased demand for clean, renewable energy sources and decreased costs of solar panels. Failing solar cells that are not producing electricity reduce a solar farm’s revenue. As a result, solar farm managers must conduct regular maintenance checks to ensure that all the solar panels are fully functional. A common way of checking whether a solar panel is performing at a sub-optimal level is to check its heat signature with a thermal camera. Many types of failures produce “hotspots,” areas on the solar panel surface that are hotter than the rest of the panel’s surface. Hotspots indicate that a panel is performing sub- optimally. Some utility-scale solar farms contain over 100,000 panels making manual heat signature checks with a hand-held thermal camera impractical. A more feasible solution is to attach a thermal camera to a quadcopter drone and check the heat signatures of each panel by flying the drone over all the panels. The aim of this thesis is to demonstrate that one can build one of these types of solar panel inspecting systems from scratch. I implemented this approach by building a quadcopter drone equipped with a thermal camera and used it to take pictures of solar modules at Princeton’s Solar Collector Field to see if my drone could capture any thermal images of hotspots. In addition to manually inspecting the thermal images of the panels, I also devised an algorithm using image segmentation to automate the analysis of these thermal images. I conclude that no hotspots were detected in the panels I inspected with my drone. I close with a discussion on some of the limitations of my implementation and how one might extend this thesis topic in future research
Crystallization of Organic Materials and its Effect on Device Performance
No full textThe field of organic devices has rapidly developed over the past couple of decades, with a
growing need for light, flexible, and low-cost devices, particularly for displays and biomedical
applications. With more applications and higher demand, the performance of these devices
has become increasingly important. Normally deposited in bulk, organic devices’ active
and transport layers have very low mobility, languishing between 10-4 and 10-2 cm2
/Vs,
which is the limiting factor in their performance [1]. Using crystalline organic materials
could lead to higher mobilities; however, unlike their inorganic counterparts, little is known
about the crystallization process of organic thin film materials. The primary goal of this
thesis was to develop large-grain crystal thin films of common organic active and transport
layers. This has already been done for rubrene by using a 5 nm underlayer of tris[4-(5-
phenylthiophen-2-yl)phenyl]amine (TPTPA), and this project aims to bring the same success
observed with rubrene to other organic materials [2]. The secondary goal of the project
was to make prototypical devices, specifically an organic light-emitting diode (OLED) and
a solar cell, to observe differences between devices with amorphous versus crystallized
transport layers. Five materials were tested to determine if they show any promise of
forming large-grain crystals. These materials are TPTPA, 1,3,5-Triazo-2,4,6-triphosphorine2,2,4,4,6,6-tetrachloride
(TAPC), Bathocuproine (BCP), Bathophenanthroline (BPhen), and
N-Bis(naphthalenyl)-bis(phenyl)benzidine (NPB). We were able to crystallize thin films of
NPB using a 5 nm underlayer of the Triphenylamine derivative (TPD). After optimizing the
crystallization process, we made an OLED and a solar cell and observed differences in the
electrical properties of the amorphous and crystalline devices
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