1,721,044 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
Metallic Fabry-Pérot Cavity-Enhanced "Pseudo-Charge Transfer" Absorption for Efficient Narrowband Short-Wave Infrared Photodetection
No full textNarrowband short-wave infrared (SWIR) organic photodetectors, combining wavelength-specific detection with the inherent advantages of organic semiconductors, are important candidates for many applications like medical diagnostics, industrial sorting, and environmental monitoring. However, previously reported spectral-narrowing strategies often compromise device performance through structural complexity and intrinsic limitations of charge-transfer (CT) absorption, even when coupled with strong cavity device architectures. To address this, a pseudo-charge-transfer state is engineered by doping an ultra-narrow bandgap third component, simultaneously optimizing electrode processing to minimize parasitic absorption and interface energetic barriers. This co-design approach yields spectrally selective photodetectors with an EQE exceeding 40% at zero-bias at 1020 nm, a FWHM of 3 x 1013 Jones, and an over 140dB dynamic range, while maintaining flexibility. PET-based devices show <5% performance degradation after 3000 bending cycles. This work establishes a general design paradigm for organic narrowband photodetectors that combines laboratory-scale performance with practical manufacturability for wearable and large-area SWIR applications.This work was funded by the National Natural Science Foundation of China (U21A20331and 22475225), the Hundred Talents Program of the Chinese Academy of Sciences (Y60707WR46), and the European Research Council (ERC, grant agreement 864625). The authors thank Sheng Dong and Yunhao Cao of Lumidar Technology Co., Ltd. for PPG measurement
Enhanced Thermal Stability of Inverted Polymer Solar Cells with Pentacene
No full textIn this study, we focused on the thermal stability of organic solar cells based on poly(3-hexylthiophene) (P3HT) and (6,6)-phenyl C-61-butyric acid methyl ester (PCBM), fabricated by blends of P3HT: PCBM : pentacene. Enhanced thermal stability of organic solar cells was achieved by introducing pentacene (Pc) into blends of P3HT: PCBM in organic solar cells with the structure indium tin oxide/ZnO/P3HT: PCBM : Pc/poly(3,4-ethylenedioxythiophene): polystyrene sulfonate/Ag (ITO/ZnO/P3HT: PCBM : Pc/PEDOT : PSS/Ag). The donor-acceptor interfaces of devices with Pc were more stable than those without Pc in the active layer. During the thermal annealing process, the Pc in the P3HT: PCBM blends suppressed the crystallization of P3HT and PCBM, which was confirmed by optical microscopic images and UV-visible absorption spectra. The power conversion efficiency (PCE) of the device with Pc was reduced to no less than 70% of its original efficiency after keeping it at 120 degrees C for 24 hours, while that of the non-Pc device was reduced to 13% of its original efficiency after 24 hours at the same temperature. Based on these results, we propose a new Pc-blended organic solar cell that has advantages in the thermal annealing process
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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