1,721,077 research outputs found
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
Solar-driven calcium looping system for carbon capture in cement plants: Process modelling and energy analysis
Full text linkJournal of Cleaner Production 394 (2023) 136367
Available online 6 February 2023
0959-6526/© 2023 Elsevier Ltd. All rights reserved.Solar-driven calcium looping system for carbon capture in cement plants:
Process modelling and energy analysis
Daniele Ferrario a,*, Stefano Stendardo b, Vittorio Verda a, Andrea Lanzini a
a Energy Department, Politecnico di Torino – C.so Duca Degli Abruzzi 24, 10129, Torino, Italy
b Italian National Agency for New Technologies, Energy and the Environment, ENEA, 00123, Via Anguillarese 301, Rome, Italy
A R T I C L E I N F O
Handling Editor: Cecilia Maria Villas Bˆoas de
Almeida
Keywords:
Cement production
Carbon capture
Calcium-looping
Concentrated solar
Industry decarbonization
A B S T R A C T
The cement industry produces around 6–7% of the global anthropogenic CO2 emissions. This sector, therefore,
needs to be decarbonized to meet the international goals on greenhouse gas emissions. In a cement plant,
however, around 60% of the CO2 emissions are hard-to-abate because they come from the calcination of the raw
materials. Carbon capture is thus needed to perform deep decarbonization of the cement production process.
Among all the carbon capture technologies proposed in the literature, Calcium looping (CaL) is one of the most
promising ones. This work analyses on novel solar-driven CaL process for carbon capture in a cement plant. In the
system proposed, the energy required for the CO2 sorbent regeneration is fully supplied by a heliostat field. The
performances of the overall system were evaluated through detailed process modelling and energy analyses.
Primary energy consumption and CO2 emissions (sum of both direct process emissions and indirect emissions due
to electricity consumption) were assessed considering different grid electricity mixes and integration levels (IL)
between the carbon capture system and the clinker kiln. We estimate that the integration of a solar-driven CaL in
a cement plant could be able to reduce over 90% of the plant CO2 emissions. Furthermore, this solution could
potentially decrease the plant fuel consumption thanks to the reuse of the exhausted sorbent in the production
process. On the other hand, a large heliostat field will be required to feed energy to the CaL process. Both the
carbon intensity of the grid electricity mix and the IL impact on the system energy and carbon balance, as shown
by the obtained values for the specific primary energy consumption for CO2 avoided (SPECCA) index. Obtained
SPECCA indexes vary between a maximum of 2.17 MJ/kgCO2, obtained for an IL of 20% and grid electricity
produced entirely from renewables, and a minimum of 0.57 MJ/kgCO2, estimated for an IL of 80% and grid
electricity produced from state-of-the-art pulverized coal
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
An Improved Thermoeconomic Diagnosis Procedure for the Detection of Different Malfunctions of Complex Energy Systems
No full text- …
