1,720,992 research outputs found
A Formaldehyde-Free Bio-Adhesive for Plywood and Particleboards Based on Soy Flour, Magnesium Oxide and a Plant-Derived Enzymatic Hydrolysate
Full text linkAt present, the particleboard industry, which together with the plywood industry dominate
the wood-based panels’ production volume worldwide, uses almost exclusively urea-
formaldehyde (UF) resins
. However, environmental sustainability and
consumer demand for healthier products have contributed to an increase in research efforts
to find substitutes for these petroleum-based thermosetting adhesives. Formaldehyde has
been reclassified as a human carcinogen compound by the International Agency for Research
on Cancer already in 2004 while a new classification entered into force for the
European Union in June 2014 following the CLP (Harmonised Classification, Labelling and
Packaging) Commission Regulation 2015/491. The discussion on both the availability of fossil
resources for producing million tons of amino resins every year and the restrictions on
formaldehyde emissions from the finished wood composite products is expected to intensify
. The US Environmental Protection Agency (EPA)5
adapted the California Air Resources Board (CARB)6 emission limits in 2017 (EPA 2017), and
formaldehyde in indoor environment is a current legislation topic in other places of the
world. The latest example comes from Germany, where lowered legal limits for
formaldehyde emissions (from the European emission level E1 of 0.10 ppm to 0.05 ppm) and
a new proposed test method will come into effect as from 1st of January 2020
(Bundesministerium für Umwelt Naturschutz und nukleare Sicherheit 2018
Il mercato della musica nell'era digitale: l'evoluzione delle preferenze e le strategie degli agenti
No full text
Finite energy solutions for nonlinear elliptic equations with competing gradient, singular and terms
Full text linkIn this paper we deal with the following boundary value problem
\begin{equation*}
\begin{cases}
-Δ_{p}u + g(u) | \nabla u|^{p} = h(u)f & \text{in ,} \newline
u\geq 0 & \text{in ,} \newline
u=0 & \text{on ,} \
\end{cases}
\end{equation*}
in a domain , where , is a positive and continuous function on , and is a continuous function on (possibly blowing up at the origin). We show how the presence of regularizing terms and allows to prove existence of finite energy solutions for nonnegative data only belonging to
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
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