1,720,988 research outputs found
Intra-Rater Reliability and Validity of Neuro-Mobinavigation: A Mobile App and Laser-Guided System of Motor HotSpot Localization
No full textBackground: Optimal transcranial magnetic stimulation (TMS) efficacy depends on precise coil placement and orientation, as even minor deviations can significantly change the excitation evoked when stimulating the primary motor cortex (M1). To compare the intra-rater reliability of a novel method for consistent TMS coil orientation over a predetermined hotspot in M1, and to benchmark its accuracy against non-navigated method. New method: A three-step method was employed. First, a laser-guided-system stabilized head position. Second, a mobile-app monitored coil tilt and orientation. Finally, coil position was marked on participant’s head cap for visual reference for both methods. Twenty-nine healthy-participants underwent six TMS blocks of 20 pulses each. Six experimental blocks, alternating between non-navigated-TMS and Neuro-Mobinavigated-TMS, to investigate the parameters of motor evoked potential (MEP). The experimental blocks were quasi-randomized with a five-minute interval. Results and comparison with existing method(s): The novel method demonstrated excellent intra-rater reliability (ICC = 0.95, 95 % CI: 0.90–0.97) compared to moderate intra-rater reliability of the non-navigated TMS (ICC = 0.73, 95 % CI: 0.57–0.85) for MEP peak amplitude. Repeated measures ANOVA for novel-method showed consistent peak amplitude across three blocks (p = 0.078), non-navigated TMS exhibited significant variations (p < 0.0001). Wilcoxon signed rank test revealed significantly higher mean peak amplitudes for the novel method (1.02 ± 0.74) compared to non-navigated TMS (0.78 ± 0.61) (p < 0.001), small effect size (r = 0.35). Conclusions: Neuro-Mobinavigation is superior to non-navigated method and provides a reliable and cost-effective alternative for MEP studies where gold standard neuronavigation is not available
The role of venture capitalists and underwriters in the underpricing of initial public offerings - by Youssef Hussein Yaacoub
No full textProject (M.B.A.)--American University of Beirut, Suliman S. Olayan School of Business, 2010.;"First Reader : Dr. Salim Chahine, Associate Professor, Suliman S. Olayan School of Business--Second Reader: Dr. Ibrahim Jamali, Assistant Professor, Suliman S. OBibliography : leaves 76-78.This paper studies the phenomenon of underpricing at the IPO Date. The focus is on the collaboration theory which states that the underwriter and the venture capitalist enter into a deal that ensures the mutual benefit for both parties. The collaboratio
Investigation of Youssef Hussein Bakkar's Critical Views about Arabic Translations of Khayyam's Quatrains Based on Antoine Berman's Theory of Deforming Tendencies
No full textYoussef Hussein Bakkar (1942-present) is a writer, researcher, and literary critic among scholars who have attempted to criticize Arabic translations of Khayyam's quatrains through his knowledge of translation techniques. The present study aims to descriptively-analytically criticize his views on these translations based on seven features (rationalization, clarification, theological terms, qualitative ennoblement, quantitative impoverishment, idiom destruction, language system destruction), which are the deforming view of Antoine Bremen (1942-1991), the French pioneer theorist. The findings of the study indicate that Bakkar used his criticism in his reviews and his views are often humorous, devoid of reasoning, and do not follow any particular theory. Adopting a linguistic approach by Bakkar shows that his critique of the method is consistent with the components of Antoine Berman's theory, but Bakkar’s linguistic approach lacks the application of theoretical issues. He does not present his views in a coherent, solidly structured theoretical framework
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
- …
