1,721,131 research outputs found
Turmoil and Opportunities in Higher Education: The Road of an Academic Department at The Dawn of The 21st Century (Second Edition)
Full text linkLu, Toh-Ming (2023). Turmoil and opportunities in higher education: The road of an academic department at the dawn of the 21st century. (Second Edition). In: "Evolutionary Progress in Science, Technology, Engineering, Arts and Mathematics", Wang, Lawrence K. and Tsao, Hung-ping (Editors). Volume 5, Number 2A, 5(2A), February 14, 2023, 233 pages. Lenox Institute Press, MA, USA. [email protected]; [email protected]. ISBN: 0-9675372-0-7. ........ ABSTRACT: At the turn of the 21th Century, American higher education underwent a turbulent time. The debate was on how teaching could be carried out effectively and how learning could be achieved successfully. The main reason for this turmoil was the arrival of the information technology. Knowledge can be found any time and place through the web. The role of professors was not just transfer of knowledge, but also on teaching students how to learn. “Student centered” learning became a key focus. During his tenure as the Physics Department Chair, Dr. Toh-Ming Lu has been a major driving force for education reform. This memoir describes insights into what he saw and felt as a Department Chair during this turbulent time and how the higher education institutions may excel in the new era of information age. The memoir was first published in the spring of 1999 after he stepped down as the Department Chairman
Thin film characterization using terahertz differential time-domain spectroscopy and double modulation
No full textCharacterizing the optical and dielectric properties of thin films in the GHz to THz range is critical for the development of new technologies in integrated circuitry, photonics systems and micro-opto-electro-mechanical systems (MOEMS). Terahertz differential time-domain spectroscopy (DTDS) is a new technique that uses pulsed terahertz (THz) radiation to detect phase changes of less than 0.6 femtoseconds (fs) and absorption changes corresponding to several molecular monolayers. This paper shows how DTDS can be combined with double modulation in the pump-probe system to improve sensitivity by an order of magnitude. The technique is experimentally verified using 1 µm thick samples of silicon dioxide on silicon.Samuel P. Mickan, Kwang-Su Lee, Toh-Ming Lu, Edward Barnat, Jesper Munch, Derek Abbott, and Xi-Cheng Zhan
Double modulated differential THz-TDS for thin film dielectric characterization
Full text linkTerahertz differential time-domain spectroscopy (DTDS) is a new technique that uses pulsed terahertz radiation to characterize the optical properties of thin dielectric films. Characterizing thin films in the GHz to THz range is critical for the development of new technologies in integrated circuitry, photonic systems and micro-electro-mechanical systems. There are potential applications for gene and protein chips. This paper shows how DTDS can be combined with double modulation in the pump-probe system to improve sensitivity by an order of magnitude. An iterative algorithm is presented to estimate the optical properties of a given thin film. The technique is experimentally verified using 1-μm-thick samples of silicon dioxide on silicon.Samuel P. Mickan, Kwang-Su Lee, Toh-Ming Lu, Jesper Munch, Derek Abbott and X. -C. Zhanghttp://www.elsevier.com/wps/find/journaldescription.cws_home/405904/description#descriptio
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Full text link“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
Full text linkWe 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
Full text linkWe 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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