1,720,979 research outputs found
L’ENDEMISMO DEL GABBIANO CORSO (LARUS AUDOINII, PAYRAUDEAU,1826) NEL BACINO DEL MEDITERRANEO. ,
No full textA Spectrometric Device To Measure Species Concentrations Close to the Surface During Re-entry
No full textAn innovative approach to measure the effects of heterogeneous catalysis during re-entry has been proposed in the framework of the instrumentation planned for the ESA-EXPERT mission.
So far measurements of species concentrations during re-entry by a spectrometer has been performed only by the Japanese READ experiment (USERS mission), using a spectrometer located inside the capsule and oriented toward the stagnation point.
The goal is to measure the recombination coefficient by measuring gas species close to the surface. The main elements of the diagnostic system are: a light capture device and a multi-channel spectrometer. Dimensions and features of the diagnostic system components have been defined.
A sapphire pole, 3mm high from the surface, is used to look directly at the surface during re-entry, measuring what ’happens’ close to the surface of a SiC/C sample. Sapphire is necessary to stand high temperatures (its melting point is almost 2300 K) and to transmit in the UV (where emission of NO is strong).
The multi-channel spectrometer has 24 channels and a spectral resolution of 0.25 nm/pixel. A multi-channel spectrometer is needed to determine the spectra at a location.
The pole will be located at about 500 mm from the end of the EXPERT nose, protruding from a SiC/C sample.
A preliminary test to validate the feasibility of the device has been planned: the CFD results obtained by CIRA for the flow close to the SiC/C sample, in condition of max heat flux, will be fed to a spectra rebuilding software (PARADE); the spectra calculated in this way will be compared with the spectra measured by the light capture device and generated by the 1200KW VKI induction Plasmatron.
By knowing the spectral emissions of species such as O, N and their molecules, including NO, it will be possible to determine the presence and concentration of these species. The species produced by surface recombination are excited; therefore the concentration of recombined molecules will be determined by distinguishing the excited gas species with respect to the non excited. The recombination coefficient will be calculated applying the kinetic model of Bruno et al. for heterogeneous catalysis. The surface heat flux has to be known to perform this calculation, and it will eventually be provided by other EXPERT measurements
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
Characterization of extracellular vesicle cargo in Sjögren’s Syndrome through a SWATH-MS proteomics approach
No full textPrimary Sjögren’s syndrome (pSS) is a complex heterogeneous disease characterized by a wide spectrum of glandular and extra-glandular manifestations. In this pilot study, a SWATH-MS approach was used to monitor extracellular vesicles-enriched saliva (EVs) sub-proteome in pSS patients, to compare it with whole saliva (WS) proteome, and assess differential expressed proteins between pSS and healthy control EVs samples. Comparison between EVs and WS led to the characterization of compartment-specific proteins with a moderate degree of overlap. A total of 290 proteins were identified and quantified in EVs from healthy and pSS patients. Among those, 121 proteins were found to be differentially expressed in pSS, 82% were found to be upregulated, and 18% downregulated in pSS samples. The most representative functional pathways associated to the protein networks were related to immune-innate response, including several members of S100 protein family, annexin A2, resistin, serpin peptidase inhibitors, azurocidin, and CD14 monocyte differentiation antigen. Our results highlight the usefulness of EVs for the discovery of novel salivary-omic biomarkers and open novel perspectives in pSS for the identification of proteins of clinical relevance that could be used not only for the disease diagnosis but also to improve patients’ stratification and treatment-monitoring. Data are available via ProteomeXchange with identifier PXD025649. © 2021 by the authors. Licensee MDPI, Basel, Switzerland
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