1,720,962 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
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
Assessing the Performance of High-RAP Mixtures Incorporating Crude Vegetable Oils and an Antioxidant from Mechanical, Environmental, and Economic Perspectives
Get PDFUtilization of mixtures with high amounts of reclaimed asphalt pavement (RAP) in the pavement industry is limited because of the adverse effects of aged materials in recycled asphalt materials. To date, numerous approaches have been used to reduce the adversity of RAP in mixtures. One such approach is the use of recycling agents (RAs) from various sources, such as petroleum and bio-oil. However, the current need is to maximize the use of RAP by adopting a sustainable source of RAs. Therefore, this study uses two RAs based on vegetable oils (crude soybean oil and crude corn oil) with high-RAP mixtures of 65%. In addition, owing to the aging susceptibility of vegetable-based oil, simultaneous use of an antioxidant (ZnDEC) was performed. The mechanical performance of high-RAP mixtures with or without a recycling agent and antioxidant was assessed in terms of cracking, rutting, and moisture resistance. Apart from that, environmental testing was performed using leaching test procedures. Life cycle cost analysis and life cycle impact analysis (LCCA and LCIA) were performed to understand the long-term cost performance and overall life-cycle impact of each mixture. The results obtained from various test matrices showed that using vegetable-based recycling agents enhanced the cracking performance of the RAP mixture while having minimal effect on the rutting and moisture susceptibility. ZnDEC had a beneficial effect on reducing the aging susceptibility of high-RAP mixtures with vegetable oil without significantly affecting the rutting and moisture susceptibility. In addition, the cost analysis and environmental analysis showed that these additives don\u27t harm the environment, and cost benefits are obtained in the long run when these additives are used with a high-RAP mixture. Overall, this study focused on a multi-aspects analysis procedure to understand the effect of the use of a high-RAP mixture modified by RAs and an antioxidant that can provide useful information on the choice of materials to be used in the asphalt industry.
Advisor: Hamzeh Haghshenas Fatmehsar
Expanding the Concept of Comprehensive Area Ratio Parameter to the South-Central States Towards Simplifying the Structural Evaluation of Flexible Pavements at the Network Level
Get PDFThe surface deflection bowl data collected through Non-Destructive Testing (NDT) has been widely utilized by various Department of Transportation (DOTs) in the South-Central States and other places. The primary purpose of using deflection-based NDTs in network-level assessment is to identify a weak pavement section that requires further analysis at the project level. The falling weight deflectometer (FWD) test is one of the common NDT based tests utilized by highway agencies in assessing the performance of the flexible pavement. However, a robust method to evaluate pavement sections utilizing FWD data from all the sensors are seldom developed. There is always a need for DOTs and highway agencies to have a simplified procedure, which can be directly implemented in agencies’ databases.
This study focuses on expanding the concept of previously developed area ratio parameters towards the pavement section of South-Central States (Arkansas, Louisiana, New Mexico, Oklahoma, and Texas) in effectively analyzing the pavement performances. Simulation-based deflections are utilized to develop enhanced deflection-based parameters. The need for extensive FWD testing at the field will be reduced with software-based simulations. 3D-MoveAnalysis and Analysis and Simulation (ANSYS) were utilized to simulate the surface deflection obtained from FWD test. Deflection values obtained through the software simulations were highly correlated with the field test results. Furthermore, ninety-seven pavement sections in these states are considered to implement and validate simplified procedures that will be readily available to various transportation agencies to evaluate their pavement conditions at the network level. Area ratio parameters developed in the study are reliable enough to consider the effect of different drop loads and various pavement sections across the South-Central States.
Additionally, a pavement ranking chart is proposed for the five South-Central states, which categorizes the pavement section to very good, good, fair, and poor pavement sections. The chart will be helpful for DOTs and highway agencies to carry out the rehabilitation and maintenance work in time and estimate the budget required in these procedures. Similarly, the remaining fatigue life of the pavement section can be easily predicted utilizing the newly-developed relationship based on comprehensive area ratio parameters and number of cycles to fatigue failure
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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