1,720,957 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
Opto-fluidic neural probes for optogenetic brain interrogation
No full textThe modulation and measurement of neuro-chemical and electrical signals with high sensitivity, spatial precision on the order of neurons, and temporal precision in milli seconds is the holy grail of neuroscience. To achieve this goal, novel tools to capture neurochemical dynamics with high spatiotemporal precision, and vast multiplexing ability are needed. On the other side, tools for neuromodulation at high speeds and high spatial precision are needed to interrogate brain networks at any arbitrary stimulation volume. Optogenetics is an ideal tool for this purpose providing fast dynamics coupled with spatial precision typically brought in by genetic specificity. Several optogenetic tools have been developed in recent years to achieve spatial resolution by beam shaping methods. However, these methods fundamentally lack the ability to focus light along the propagation axis of the beam, limiting the localization of excitation to only two dimensions. Further, the strength of excitation is highest closest to the implant, preventing selective excitation of distant neuronal volumes.
In this dissertation, a novel metamaterial based beam shaper that can be integrated into thin neural probe shanks is presented along with its integrated photonics backbone. These beam shapers are experimentally demonstrated to focus light to a variable volume from 2 cubic micron to as small as 0.06 cubic micron, corresponding to NAs as high as 0.95. The focusing ability of these beam shapers in scattering media is demonstrated with the ability to localize light to a single neuron’s excitation volume along the axis of propagation. The preserving of focal volume despite tissue scattering due to the high numerical aperture of these lenses is also shown.
Parallelly, the supporting building blocks of high yield fluidic packaging, a film stress tuning mechanism for straight microneedle fabrication, and an integration and co-packaging scheme with photonics are established to support the development of a state-of-the-art fluidics neural probe platform.Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-12-01The student, Hrishikesh Iyer, accepted the attached license on 2025-09-09 at 16:21.The student, Hrishikesh Iyer, submitted this Dissertation for approval on 2025-09-09 at 17:32.This Dissertation was approved for publication on 2025-09-10 at 13:21.DSpace SAF Submission Ingestion Package generated from Vireo submission #22795 on 2026-02-19 at 18:45:2
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
Study of mechanical effects of microfluidic channels in microneedles
Get PDFModern neural probes integrate microfluidic chemical sampling to measure spatio-temporal neurochemical transients in the brain while also pursuing miniaturization to minimize tissue damage. This brings into question the effect of the integrated microfluidic channels on the mechanical integrity of these probes. We have developed a set of tools to help us answer this question. We built an analytical model to predict the mechanical strength of a probe and used that backbone to answer the inverse question of what range of geometries are available to us for a target brain. We then bench marked this model against more complex simulations which were in turn validated with literature sources. This helped us obtain more insights into the effect or lack thereof of microfluidic channels on a neural probe’s mechanical integrity. Finally, we fabricated samples to test and built a setup to experimentally measure the mechanical strength of our probes. The experimental measurements unfortunately do not agree with our simulations or analytical model for several reasons we have outlined. We need to build a more robust and precisely controlled setup in order to take better measurements and completely leverage the predictive powers of our models.Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-01-12 without embargo termsThe student, Hrishikesh Iyer, accepted the attached license on 2021-07-22 at 11:56.The student, Hrishikesh Iyer, submitted this Thesis for approval on 2021-07-22 at 12:06.This Thesis was approved for publication on 2021-07-22 at 14:20.DSpace SAF Submission Ingestion Package generated from Vireo submission #17063 on 2022-01-12 at 12:46:49Made available in DSpace on 2022-01-12T21:47:01Z (GMT). No. of bitstreams: 2
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Previous issue date: 2021-07-2
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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