1,720,956 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
RATIONAL DESIGN OF PLASMONIC HYBRID HETERO-NANOARCHITECTURES WITH GEOMETRICALLY TUNABLE OPTICAL PROPERTIES FOR PLASMON-MEDIATED APPLICATIONS
Full text linkThis work is embargoed by the author and will not be publicly available until December 2025.Multicomponent plasmonic nanoparticles, especially structurally well-defined noble metal — nonstoichiometric copper chalcogenide dual plasmonic hybrid hetero-nanostructures, have emerged as an intriguing platform of superstructures due to their synergistically reinforced optical properties. The integration of two intrinsically dissimilar plasmonic constituents in one nano-entity empowers researchers to explore many new-yet-unexpected features, holding tremendous potential for plasmon-mediated energy transfer, plasmon-enhanced photocatalysis, and plasmon-related photothermal and photodynamic theranostics. Although significant research efforts have been dedicated to exploring the potential of those novel nanomaterials for biomedical applications, there remains a dearth of knowledge concerning their structural design complexity, the impact of nanoarchitecture on optical properties, as well as a comprehensive understanding of fundamental aspects, such as plasmon interactions within nanostructure. In attempt to bridge the existing knowledge gap, the photocatalytic experiments have been performed to compare efficiency of the hetero-nanostructures when only optical resonances of Cu2–xSe shell were photoexcited and when both noble metal and semiconductor were photoexcited simultaneously. The rate of photocatalytic reactions under the dual plasmon excitation was found to be greater than those under sole excitation of semiconductor shell and attributed to the plasmonic coupling between two dissimilar optical resonances. To further explore the role of the plasmonic coupling strengths in photocatalysis, dual plasmonic hetero-nanostructures based on anisotropic core were studied. Such a deliberate design produces tunable plasmon resonance of metallic component at lower energies, which is much closer to the spectral position of vacancy-doped copper chalcogenides optical response, ensuring more efficient coupling. The results suggest that the photocatalytic activity of anisotropic dual-plasmonic nanostructures is defined by plasmonic coupling strength and their surface area. To enrich the library of available dual plasmonic hetero-nanostructures, hard-template synthesis of hollow nanocrystals comprising noble metal cores and nonstoichiometric copper chalcogenide shells was developed. Hollow dual plasmonic nanostructures have been synthesized using two distinctive organic chalcogenide precursors through the nanoscale Kirkendall effect. Among those nanomaterials, preparation and characterization of hollow dual plasmonic Au@Cu2−xSe hybrid nanostructures have been performed for the first time. The divergence of nanoarchitectures and the interior pore size tunability of obtained hollow dual plasmonic hetero-nanostructures with different copper chalcogenide shells and their impact on optical properties were methodically studied. While Au@Cu2−xSe have been fabricated after complete transformation of Au@Cu2O templates, remaining Cu2O was still attached to the Au core after the synthesis of Au@Cu2−xS. This architecture divergence caused discrepancy in extinction spectra of these nanomaterials. Plasmonic nanocatalysts generally based on noble metal nanoparticles, such as gold, silver, and copper exhibit rather limited catalytic activities, which hinders their practical applications in the real world. Conversely, other noble metal nanocrystals, such as palladium with a myriad of well-controlled morphologies and superior catalytic performances do not support LSPRs excitation in the visible or near-infrared spectral ranges due to plasmon damping. In this context, multicomponent hybrid hetero-nanostructures integrating desired plasmonic and catalytic constituents have been obtained from Au@Ag nanocuboids templates via galvanic replacement reaction with H2PdCl4. Pd-rich hollow multimetallic nanostructures with precisely controlled Pd content exhibited increase in extinction intensity and tunable plasmon resonances. Their catalytic activity was studied in the SERS monitored reduction reaction of 4-nitrothiophenol by NaBH4. Ag(nanocubes)@Cu2O NPs is one more important class of multicomponent heterostructured nanosystems comprising a noble metal and a semiconductor, showing enhanced and tunable plasmonic properties. Optimization of Ag(nanocubes)@Cu2O nanocomposites characteristics was performed through the precise control over the synthetic parameters. Prepared Ag@Cu2O core-shell hetero-nanostructures with the shell thickness ~70 nm possessed LSPR band resonant with the NIR laser (λex = 808 nm) and demonstrated the highest photothermal conversion efficiency of ~25.4%. These findings have significant implications in various biomedical applications due to the superior tissue penetration of 808 nm laser compared to widely used 980 nm excitation wavelength or visible light.2025-12-1
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
THE CHARACTERISTICS OF ENGLISH TERMS STRUCTURE IN ARCHITECTURE AND CONSTRUCTION INDUSTRY
No full textThe article deals with structural typology in architecture and construction terminology. Modern linguists pay great attention to the study of terminological units in different branches of industry in modern world. The rapid growth of terms number in architect and construction requires its study, description and systematization. The current body of research provides clear evidence of much attention being paid to the architecture and construction industry itself, and its terminology in particular. The task of the research was to compare the structural features and identify the quantitative ratio of components in architecture and construction terms. Consequently, the object of research was the English terminology of architecture and construction industry, and the subject concerned the structural peculiarities of the English architecture terms. English samples of architecture and construction terms from internet resources have been analysed. Structural peculiarities of English architecture and construction terms have been studied and defined by the methods of comparative and structural analysi
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
- …
