1,721,001 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
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
The Status and Need for Plant Biotechnology Education in Texas Secondary Agricultural Curriculum
Get PDFThe purpose of this research was to examine biotechnology education in Texas secondary Agriscience programs. Historical trends in enrollment, and the current status of the curriculum utilized were assessed. This study serves to describe biotechnology education in secondary programs of agricultural education in Texas, and is part of a larger effort to improve biotech education. This project involved analyzing enrollment data, the Texas Essential Knowledge and Skills (TEKS) for Agriculture, Food and Natural Resources classes (AFNR), and the curriculum available to address these competencies. The extent of enrollment of biotechnology courses versus existing AFNR courses was also examined. The extent of biotechnology concepts incorporated into horticulture and advanced plant and soil science courses across the State of Texas was also explored. Our findings indicate biotechnology education, specifically plant-based biotechnology, are lacking in the curriculum; most surprisingly in the ��130.21: Advanced Plant and Soil Science and ��130.20: Horticulture Science courses, where the technology is most commonly implemented. Additionally, there was a significant gap of enrollment of biotechnology courses in comparison to overall AFNR enrollment. This study provides a starting point and benchmark data for future research in the field of biotechnology education in Texas
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
Methods to evaluate mouse dorsal cortical function during social and innate behaviors
No full textAdvances in neural imaging and recording technology have enabled the study of large-scale neural dynamics, revealing that various behaviors, such as decision-making or spontaneous movements, are associated with widespread cortical activation. Mesoscale calcium imaging provides an opportunity to assess these distributed cortical networks. This dissertation focuses on developing methods to study neural activity across the dorsal cortex of mice during social interactions and automatic movements. The methods described in this thesis open the door for the investigation of mesoscale cortical function in genetic mouse models of neurological disorders such as autism spectrum disorders or obsessive-compulsive disorders.
First, I use widefield fluorescence imaging to compare new AAV-mediated approaches for expressing the calcium indicator, GCaMP6s, against transgenic expression methods. This functional comparison includes in vivo measurements to assess basal fluorescence brightness, visual stimulus-evoked sensory responses, magnitude of spontaneous activity fluctuations, and functional correlations across the cortex. This work establishes the systemic administration of AAV-PHP.eB-hSyn-GCaMP6s through tail-vein injection as a viable strategy for mesoscale cortical calcium imaging applications and benchmarks the performance of three commonly used transgenic models for these applications as well.
Next, I develop a method to image mesoscale cortical calcium imaging across the brains of two mice simultaneously, while the mice are engaged in a constrained face-to-face social interaction. This is achieved by mounting one animal on a motor-controlled rail and varying the distance between each animal. Cross-brain measurements are assessed, including correlations in activity and behavior induced cortical responses. This work introduces a novel approach to study mesoscale cortical calcium imaging during social interaction and presents instructions for assembling a low-cost Raspberry Pi-based mesoscale imaging system.
Finally, I employ a simple method to stimulate innate brainstem-mediated grooming behaviors while measuring cortical activity. Cortical representations of grooming behaviors were observed both at a mesoscale network-level and single-cell resolution. Mesoscale cortical activation was most prominent at the onset of grooming episodes and declined to baseline levels despite continuous engagement in the behavior. These findings help to frame the impact of forms of automatic movements on large scale cortical ensembles and suggest they engage specific and transient cellular and regional cortical ensembles.Medicine, Faculty ofGraduat
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
- …
