1,721,127 research outputs found
A Modest Suggestion: Baking Using Sourdough - a Sustainable, Slow-Paced, Traditional and Beneficial Remedy against Stress during the Covid-19 Lockdown
Full text link
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
Expression of chloroplastic and cytosolic glutamine synthetase in barley leaves after cold-sensitive blocking of beta-carotene synthesis by amitrole or mutation.
No full textd3-Amino-1,2,4-triazole (amitrole) provided to germinating barley at 20 degrees C in the light led to bleached seedling leaves and photodynamic destruction of chloroplast structure, whereas normal greening and chloroplast ultrastructure was obtained when the seedlings developed in the presence of amitrole in the light at 30 degrees C. Mass spectrometric analysis of the extractable herbicide demonstrated the same content of amitrole in leaves developed at 20 and 30 degrees C. A very similar temperature-sensitive syndrome is characteristic for the nuclear gene mutant tigrina-o(34) in barley. Amitrole and the mutation were shown to inhibit the cyclization of lycopene, leading to severe deficiencies in beta-carotene and its xanthophyll derivative lutein. Besides accumulation of lycopene, also its precursors phytoene, phytofluene and xi-carotene accumulated. Inhibition of carotenoid biosynthesis by amitrole and the mutation at 20 degrees C in the light led to a strong reduction of both transcript and protein levels for chloroplastic glutamine synthetase (GS(2)) while transcript amount and protein of the cytosolic isoenzyme (GS(1)) were unaffected. At 30 degrees C increased levels of mRNA for the chloroplastic isoform GS(2) were observed in wild type, mutant and amitrole-treated seedlings, but protein levels remained unchanged. Turnover rates of the GS(2) protein were the same at 20 and 30 degrees C. This extensive translational control of chloroplastic GS(2) synthesis was also observed in a hear shock experiment, which revealed transiently increased mRNA levels for chloroplastic GS(2) but unchanged protein levels. Permissive synthesis of beta-carotene and chloroplastic glutamine synthetase (GS(2)) at 30 degrees C in the presence of amitrole or the tigrina-o(34) mutation might be due to two alternative pathways of ionone ring formation using either lycopene or neurosporene as substrates for cyclization
Development of an IoT Cloud Control System for Managing Pressurized Gas Containers
Full text linkAutomatic remote management of gas cylinders is an important task for gas companies, especially if it saves time and money on replacement and maintenance. The system presented here can be used in various industries that require monitoring of cylinders containing gas, such as industrial, medical, and food. The main advantage offered is the ability to arrange for cylinder replacement in advance to speed up, minimize downtime, and facilitate logistics. Monitoring uses a microcontroller from the Arduino family, which can continuously detect the state inside the cylinder via a pressure transducer. The customer can monitor the system by viewing the cylinder's status locally or through an online dashboard. In addition, if the level inside the cylinder becomes critical, the system turns on a warning LED light and sends an Alert message to the Cloud containing location information. The alert message was generated in the AWS IoT Cloud environment using the MQTT protocol and will be received on a mobile device owned by the cylinder replacement operator. Finally, an energy analysis has been carried out to evaluate the autonomy characteristics of the device
- …
