1,782,793 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe 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
Resolución UNRN N° 433/2009. Otorga equivalencia
No full textFil: Universidad Nacional de Río Negro (U). Universidad Nacional de Río Negro. Río Negro, ArgentinaResolución UNRN N° 433/2009. Otorga equivalenciafals
Bulletin No. 433 - Wyo 1966 - A New Pinto Bean
No full textBulletin No. 433 - Wyo 1966 - A New Pinto Bea
Participant 433 Community Conversations Interview
No full textIn this interview, Participant 433 discusses the challenges they have faced trying to continue their education from home. The participant also shares they contracted COVID-19, and that some family members had passed away from the virus. They say they did not want to use social media for COVID-19-related information, and instead relied on correspondences from their school for reliable information. The participant expresses that they wish there were stricter mandates in the beginning of the pandemic to better control virus transmission rates.New Jersey Department of Healt
Dendrobium officinale Polysaccharide Alleviates Intestinal Inflammation by Promoting Small Extracellular Vesicle Packaging of miR-433-3p
No full textDendrobium officinale polysaccharide
(DOP) attenuates inflammatory bowel disease (IBD), but its role in
regulating cross-talk between intestinal epithelial cells (IEC) and
macrophages against IBD is unclear. This study aimed to investigate
DOP protective effects on the intestinal inflammatory response through
regulation by miRNA in small extracellular vesicles (sEVs). Our results
show that DOP interfered with the secretion of small extracellular
vesicles (DIEs) by IEC, which reduced the levels of inflammatory mediators.
Increased miR-433-3p expression in DIEs was identified as an important
protector against intestinal inflammation. DOP regulated the loading
of miR-433-3p by hnRNPA2B1 into the intestinal sEV to increase the
abundance of miR-433-3p. DIEs delivered miR-433-3p to lipopolysaccharide-induced
macrophages and targeted the MAPK8 gene, leading to inhibition of
the MAPK signaling pathway and reduced production of inflammatory
cytokines. One protective mechanism of DOP is mediated by intestinal
sEV containing miR-433-3p, which is a potential therapeutic agent
for the prevention of inflammatory factor accumulation from excessive
intestinal macrophage activity and for restoring homeostasis in the
intestinal microenvironment
Mapping the Discipline of the Olympic Games An Author-Cocitation Analysis
No full textThe authors conducted an author cocitation analysis on prominent authors writing about the Olympics during the 1990s. Author cocitation is an established bibliometric technique that can be used to measure the relative similarities of topics written about by the cited authors. This enables a visual representation of the “intellectual space” of the discipline, in this case the Olympics, to be created for the period under review. So core and peripheral research areas are identified, along with their major contributors. The representation appears as a two-dimensional cluster-enhanced map. Subject expertise was then applied to the results to place labels on the generated clusters of authors and their topics
Analytical perturbation method for frozen orbits around the asteroid 433 Eros
No full textIn this paper a method for obtaining initial condition for frozen orbits around fast rotating, highly irregular bodies is presented. Such method is based on a general perturbative theory of motion, for inhomogeneous gravitational fields. Taking into account the terms of the gravitational potential up to an arbitrary order to construct a precise Hamiltonian formulation of the problem, the system is averaged both over the argument of node and the mean anomaly, to reduce its complexity (i.e. the number of degrees of freedom). An approximate system is obtained, which provides an accurate description of the dynamics of the initial system. This can be applied to every celestial body and in particular, can be exploited for constructing a method for finding initial conditions to yield frozen orbits. These orbits can then be used as reference trajectories in missions that require close inspection of asteroids. To this end applications to derive frozen orbits for Eros 433 have been provided which could be of key interest for every observational, discovery mission around this asteroid
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