1,723,304 research outputs found
??????????? ?????????? [Three Revolutionaries: Ho Kai, Sun Yatsen, and Fu Bingchang]
No full textThis lecture traces the crossing of paths at certain times between the lives of three great revolutionaries of the Republic, Ho Kai, Sun Yatsen and Fu Bingchang. The aim of the lecture is not to describe the life of Sun Yatsen, but rather to introduce the relatively unknown characters of Ho Kai and Fu Bingchang, for unlike the well chronicled life of Sun, far less is known about either Ho Kai or Fu. Fu was related to Ho Kai by marriage. I believe the connections between these three gentlemen are important because, as I show later, each one was influenced or influenced by the other, quite significantly. Indeed, the connections between Ho Kai, Sun Yatsen and Fu were based on a number of different levels, each of them noteworthy: family connections, friendships, teacher versus student connections, business links - and most important of all, the revolution itself.</p
??????????? ?????????? [Three Revolutionaries: Ho Kai, Sun Yatsen, and Fu Bingchang]
No full textThis lecture traces the crossing of paths at certain times between the lives of three great revolutionaries of the Republic, Ho Kai, Sun Yatsen and Fu Bingchang. The aim of the lecture is not to describe the life of Sun Yatsen, but rather to introduce the relatively unknown characters of Ho Kai and Fu Bingchang, for unlike the well chronicled life of Sun, far less is known about either Ho Kai or Fu. Fu was related to Ho Kai by marriage. I believe the connections between these three gentlemen are important because, as I show later, each one was influenced or influenced by the other, quite significantly. Indeed, the connections between Ho Kai, Sun Yatsen and Fu were based on a number of different levels, each of them noteworthy: family connections, friendships, teacher versus student connections, business links - and most important of all, the revolution itself.</p
Channel scheduling for optical communication network with frequency concurrency
No full textThesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1988.Bibliography: leaves 147-151.by Albert Kai-Sun Wong.Ph.D
Recrystallised Si nanofingers and nanowires for low cost biosensor applications
No full textRecently, Si nanowires and micron-wide nanoribbons are gaining much attention for biosensing because they offer real-time, label-free, high sensitivity sensing. Currently Si nanowires are fabricated using CMOS technology, SOI substrates and e-beam lithography, which give high costs. In this paper we investigate a lower cost alternative using TFT technology and study the lateral crystallization of Si nanoribbons for application in Si biosensors. A comparison is made of the crystallization of a-Si on SiO2 and on air for use in top-gate and surround-gate sensors. The crystallization is assessed using Normarski microscopy, planar and cross-sectional SEM and defect etching. The results show better lateral crystallization for Si-on-Air than Si-on-Oxide. For a 10h anneal at 550°C, the crystallization extended 24µm for Si-on-Air and 11µm for Si-on-SiO2, whilst a 20h anneal at 525°C gives 7.7µm and 4.9µm respectively. Plan-view SEM images also show slightly lower NiSi2 precipitates in Si-on-Air than Si-on-Oxide. Cross-section SEM images show randomly nucleated grains at the bottom of the crystallized layer, with a density of 1.3/µm and 3.2/µm for Si-on-Air and Si-on-Oxide, indicating the suppression of random grain nucleation in Si-on-Air samples. These results promise better electrical performance from crystallized Si-on-Air sensors than Si-on-Oxide sensors
Fluorine dose effect on the nickel induced lateral crystallization of amorphous silicon
No full textRecently, Si nanowires have been gaining much attention for applications such as biosensing for medical diagnosis, drug discovery and national security. Currently Si nanowires are fabricated using CMOS technology and often use expensive SOI substrates and electron beam lithography, which seriously limits their use in low cost applications. Polysilicon thin film transistor technology offers the prospect of much lower costs and would be very attractive for products such as disposable diagnostic kits. TFTs are usually fabricated using the crystallization of amorphous Si (?-Si) by solid-phase crystallization, laser crystallization and metal-induced lateral crystallization (MILC). For the creation of polysilicon, Nickel-MILC is attractive for its simplicity, low cost and low process temperature, which is necessary if low cost glass or polymer substrates are to be used. Earlier work showed that fluorine implantation could be used to significantly improve the crystallization length during Nickel-MILC. In this work we investigate the effect of the fluorine implantation dose on the crystallization length, with the aim of further reducing the process temperature. An optimum fluorine dose of 2.5×15 cm-2 is identified, which maximises the crystallization length
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
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