1,721,024 research outputs found
DS_10.1177_0363546518759674 – Supplemental material for Nonsurgical Treatments of Patellar Tendinopathy: Multiple Injections of Platelet-Rich Plasma Are a Suitable Option: A Systematic Review and Meta-analysis
No full textSupplemental material, DS_10.1177_0363546518759674 for Nonsurgical Treatments of Patellar Tendinopathy: Multiple Injections of Platelet-Rich Plasma Are a Suitable Option: A Systematic Review and Meta-analysis by Luca Andriolo, Sante Alessandro Altamura, Davide Reale, Christian Candrian, Stefano Zaffagnini, and Giuseppe Filardo in The American Journal of Sports Medicine</p
Noninterferometric rotational test of the continuous spontaneous localization model: Enhancement of the collapse noise through shape optimization
Full text linkThe continuous spontaneous localization (CSL) model is the most studied among collapse models, which describes the breakdown of the superposition principle for macroscopic systems. Here, we derive an upper bound on the parameters of the model by applying it to the rotational noise measured in a recent short-distance gravity experiment [Lee et al., Phys. Rev. Lett. 124, 101101 (2020)]. Specifically, considering the noise affecting the rotational motion, we found that despite being a tabletop experiment the bound is only one order of magnitude weaker than that from LIGO for the relevant values of the collapse parameter. Further, we analyze possible ways to optimize the shape of the test mass to enhance the collapse noise by several orders of magnitude and eventually derive stronger bounds that can address the unexplored region of the CSL parameters space
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
Table-top combined scanning X-ray small angle scattering and transmission microscopies of lipid vesicles dispersed in free-standing gel
No full textA mm thick free-standing gel containing lipid vesicles made of 2-oleoyl-1-palmitoyl-sn-glycero-3-
phosphocholine (POPC) was studied by scanning Small Angle X-ray Scattering (SAXS) and X-ray
Transmission (XT) microscopies. Raster scanning relatively large volumes, besides reducing the risk of
radiation damage, allows signal integration, improving the signal-to-noise ratio (SNR), as well as high
statistical significance of the dataset. The persistence of lipid vesicles in gel was demonstrated, while
mapping their spatial distribution and concentration gradients. Information about lipid aggregation and
packing, as well as about gel density gradients, was obtained. A posteriori confirmation of lipid presence
in well-defined sample areas was obtained by studying the dried sample, featuring clear Bragg peaks
from stacked bilayers. The comparison between wet and dry samples allowed it to be proved that lipids
do not significantly migrate within the gel even upon drying, whereas bilayer curvature is lost by
removing water, resulting in lipids packed in ordered lamellae. Suitable algorithms were successfully
employed for enhancing transmission microscopy sensitivity to low absorbing objects, and allowing full
SAXS intensity normalization as a general approach. In particular, data reduction includes normalization
of the SAXS intensity against the local sample thickness derived from absorption contrast maps. The
proposed study was demonstrated by a room-sized instrumentation, although equipped with a high
brilliance X-ray micro-source, and is expected to be applicable to a wide variety of organic, inorganic,
and multicomponent systems, including biomaterials. The employed routines for data reduction and
microscopy, including Gaussian filter for contrast enhancement of low absorbing objects and a region
growing segmentation algorithm to exclude no-sample regions, have been implemented and made
freely available through the updated in-house developed software SUNBIM
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
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