1,720,959 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
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Relationships Between Composition, Structure, Reactivity, and CO2 Uptake in Calcium Aluminosilicate Glasses
No full textThe production of OPC is responsible for 5-8% of global anthropogenic CO2 emissions, with about 50% of these emissions arising from the decomposition of CaCO3, a primary ingredient in cement. Among the strategies to mitigate these emissions, CO2 mineralization and the substitution of OPC with supplementary cementitious materials (SCMs) are the most practical and cost-effective solutions. However, the complexity of SCMs due to their heterogeneous phases and chemical compositions presents challenges in understanding their behavior, prompting research into alternative, engineered SCMs. As a result, identifying and evaluating alternative SCMs, including engineered SCMs, has become a critical area of research. Therefore, in this thesis, we leverage pure-phase material as a model system for understanding the existing SCM systems. The pure-phase model systems, containing a broad range of pure calcium aluminosilicate materials (CAS), provide a controlled platform to gain a fundamental understanding of the composition-structure-reactivity-CO2 uptake relationship essential for understanding and advancing current and future SCMs. This thesis is composed of three studies. Composition-structure relationships in calcium aluminosilicate glasses (S1): This study provides a comprehensive structural characterization of a broad range of CAS glasses using advanced experimental techniques, filling a significant gap in existing literature that has primarily focused on low CaO compositions. Reactivity and reaction kinetics of calcium aluminosilicate glasses (S2): This study focuses on the reaction kinetics of CAS glasses, assessed through heat release measurements, suggesting that CaO content is ‘good enough’ to measure reactivity, and time and effort spent determining complex structural descriptors may not provide any added value. CO2 Uptake in Calcium Aluminosilicate Materials (S3): This study investigates the carbonation potential of several CAS systems with varying degrees of amorphization, highlighting a trade-off between SCM reactivity and carbonation. </p
Recurrent unit together with reinforcement learning for graph networks
Get PDFRecently a deep neural network architecture designed to work on graph- structured data have been capturing notice as well as getting implemented in various domains and application. However, learning representation (feature embedding) from graphical data picking pace in research and constructing graph(s) from dataset remains a challenge. The ability to map the data to lower dimensions further makes the task easier while providing comfort in applying many operations. Graph neural network (GNN) is one of the novel neural network models that is catching attention as it is outperforming in various applications like recommender systems, social networks, chemical synthesis, and many more. This thesis discusses a unique approach for a fundamental task on graphs; node classification. The feature embedding for a node is aggregated by applying a Recurrent neural network (RNN), then a GNN model is trained to classify a node with the help of aggregated features and Q learning supports in optimizing the shape of neural networks. This thesis starts with the working principles of the Feedforward neural network, recurrent units like simple RNN, Long short-term memory (LSTM), and Gated recurrent unit (GRU), followed by concepts of Reinforcement learning (RL) and the Q learning algorithm. An overview of the fundamentals of graphs, followed by the GNN architecture and workflow, is discussed subsequently. Some basic GNN models are discussed in brief later before it approaches the technical implementation details, the output of the model, and a comparison with a few other models such as GraphSage and Graph attention network (GAN)
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe 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
Relationships Between Composition, Structure, Reactivity, and CO2 Uptake in Calcium Aluminosilicate Glasses
No full textThe production of OPC is responsible for 5-8% of global anthropogenic CO2 emissions, with about 50% of these emissions arising from the decomposition of CaCO3, a primary ingredient in cement. Among the strategies to mitigate these emissions, CO2 mineralization and the substitution of OPC with supplementary cementitious materials (SCMs) are the most practical and cost-effective solutions. However, the complexity of SCMs due to their heterogeneous phases and chemical compositions presents challenges in understanding their behavior, prompting research into alternative, engineered SCMs. As a result, identifying and evaluating alternative SCMs, including engineered SCMs, has become a critical area of research. Therefore, in this thesis, we leverage pure-phase material as a model system for understanding the existing SCM systems. The pure-phase model systems, containing a broad range of pure calcium aluminosilicate materials (CAS), provide a controlled platform to gain a fundamental understanding of the composition-structure-reactivity-CO2 uptake relationship essential for understanding and advancing current and future SCMs. This thesis is composed of three studies. Composition-structure relationships in calcium aluminosilicate glasses (S1): This study provides a comprehensive structural characterization of a broad range of CAS glasses using advanced experimental techniques, filling a significant gap in existing literature that has primarily focused on low CaO compositions. Reactivity and reaction kinetics of calcium aluminosilicate glasses (S2): This study focuses on the reaction kinetics of CAS glasses, assessed through heat release measurements, suggesting that CaO content is ‘good enough’ to measure reactivity, and time and effort spent determining complex structural descriptors may not provide any added value. CO2 Uptake in Calcium Aluminosilicate Materials (S3): This study investigates the carbonation potential of several CAS systems with varying degrees of amorphization, highlighting a trade-off between SCM reactivity and carbonation. </p
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
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