1,721,087 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
Discrete Linear Canonical Transform and Its Applications
No full text在這篇論文中，我們首先由Hermite-高斯微分方程式討論離散Hermite函數(DHFs)，提出具有放大縮小能力的置中離散Hermite高斯函數(CDDHFs)以及位移且具有放大縮小能力的置中離散Hermite高斯函數(SDDHFs)。
同時，我們利用提出的置中離散Hermite高斯函數實現離散線性轉換，例如散線性完整轉換(DLCT)與離散Hilbert轉換；線性完整轉換(LCT)是傅立葉轉換(FT)、分數傅立葉轉換(FrFT)、菲涅耳轉換(Fresnel transform)與放大縮小運算(scaling operation)的一般式，因此線性完整轉換在訊號處理上十分具有吸引力；然而，以往的論文只討論連續取樣方式實現的DLCT，在這種連續取樣方式下，LCT固有的加成與可逆特性將無法成立；因此，我們利用提出利用CDDHFs實現離散線性完整轉換，該實現的離散線性完整轉換具有加成與可逆特性，而且不需要超取樣；更進一步，也利用提出的DLCT實現相關的解析訊號和Hilbert轉換定義，並應用於加密的單邊帶通訊。
再者，我們將DHFs延伸至一般化Hermite高斯函數，我們定義一般化Hermite高斯函數的微分方程式，並說明與standard和elegant高斯函數的關連；進一步，我們利用光學的模式轉換，將離散的一般化Hermite高斯束模式轉換至離散的一般化Laguerre和Ince高斯束模式；最後，我們推導從離散Hermite高斯束縳換至離散Laguerre高斯束的轉換係數之快速演算法，並提供特徵點偵測和影像重建等應用。In this dissertation, we first provide a discussion of discrete Hermite functions (DHFs) starting from the Hermite-Gaussian differential equation. The proposed center dilated discrete Hermite functions (CDDHFs) have good ability in discrete scalable Hermite expansions. Whereas, the shifted dilated discrete Hermite functions (SDDHFs) are a shifting extension version of CDDHFs.
Then, we use the developed DHFs to realize the discrete linear transform, such as the discrete linear canonical transform (DLCT) and discrete canonical Hilbert transform. The linear canonical transform (LCT) is an attractive transform because it generalizes Fourier transform (FT), fractional FT (FrFT), Fresnel transform, and scaling operation as its special cases. However, in earlier reference papers, they only discuss the sampled-continuous approach to realized DLCT. Under such sampled-continuous approach, the LCT inherent additivity and reversibility properties cannot be held. Therefore, we define a novel DLCT by means of eigen-decomposition in dilatable eigenspace based on the CDDHFs. The implemented DLCT possess additivity and reversibility properties while with no oversampling involved; meanwhile, the proposed DLCT has very good approximation to continuous LCT. Moreover, we use the proposed DLCT to realize canonical analytic signal (CAS) and canonical Hilbert transform (CHT). The proposed CAS and CHT have several practical applications, such as the scalable edge detection and secure single-sideband communication.
Further, we generalize the DHFs to discrete “generalized” Hermite Gaussian functions. We provide a compact differential equation model for the generalized Hermite Gaussian functions and show the relations between standard and elegant Hermite Gaussian functions. Afterward, we extend the discrete “generalized” Hermite Gaussian mode to Laguerre and Ince Gaussian modes by using the mode conversion in optics. We also derive fast algorithm for the transformation coefficients to compute the discrete Laguerre Gaussian functions from discrete Hermite Gaussian functions. The applications of discrete Laguerre Gaussian functions in circular pattern keypoints selection and image reconstruction are also demonstrated.口試委員會審定書
誌謝……………………………………………………………………………………..i
中文摘要………………………………………………………………………………..ii
Abstract………………………………………………………………………………....iv
Abbreviations………………………………………………………………………....vii
Chapter 1 Signal Scaling by Centered Discrete Dilated Hermite Functions 1
1.1 Introduction…………………….…………………………………………….…….1
1.2 Construction and Comparison of Centered Discrete Dilated Hermite Functions....4
1.3 Discrete Scalable Hermite Expansions……………………………………….…..11
1.3.1 Signal Approximation by Estimating the Dilation Parameter…………...11
1.3.2 Discrete Signal Scaling………………………………………….…….…16
1.4 Conclusions…………………………………………………………………....….19
Chapter 2 Discrete Linear Canonical Transforms based on Dilated Hermite Functions 21
2.1 Introduction…………………….………………………………………….…….21
2.2 Preliminaries……………………………………………………………………..28
2.2.1 Special Linear Canonical Transforms and Their Effects on Wigner Distribution……………………………………………………..………..28
2.2.2 Centered Discrete Dilated Hermite Functions……………………………34
2.3 Formulation of Discrete Linear Canonical Transform…………………………..37
2.3.1 DLCT Method based on CDDHFs……………………………………….38
2.4 Numerical Examples and Comparisons………………………………………….45
2.4.1 Comparison with CM-CC-CM Method and Method II in [2.24]………...49
2.4.2 Comparison with Sampled LCT of Gaussian Function…………………..52
2.5 Additivity and Reversibility……………………………………………………..55
2.5.1 Additivity…………………………………………………………………56
2.5.2 Reversibility………………………………………………………………59
2.6 Conclusions…………………………………………………………………....….62
Chapter 3 Derivation, and Discrete Implementation for Analytic Signal of Linear Canonical Transform 63
3.1 Introduction…………………………………………………........……………...63
3.2 Preliminaries……………………………………………………………………..66
3.2.1 Linear Canonical Transform……………………………………………...66
3.2.2 Wigner Distribution Function…………………………………………….67
3.3 Linear Canonical Transform Analytic Signal and Hilbert Transform……….…...69
3.4 Discrete Implementation for Linear Canonical Transform Analytic Signal…….74
3.4.1 Example 1: Generation of Linear Canonical Transform Analytic Signal...74
3.4.2 Example 2: Recovery of Traditional Analytic Signal from Linear Canonical Transform Analytic Signal........................................................77
3.4.3 Example 3: Scalable Edge Detection by Linear Canonical Transform Analytic Signal……………..……………………………………………..79
3.5 Linear Canonical Transform Analytic Signal in Secure SSB Communication....80
3.6 Conclusions…………………………………………………………………....….82
Chapter 4 Closed Form Variable Fractional Time Delay Using FFT 85
4.1 Introduction…………………….……………………………………………….85
4.2 Fractional Time Delay and Its Closed Form in Windowing Method……………87
4.3 Experimental Results…………………………………………………………….92
4.4 Conclusions…………………………………………………………………....….96
Chapter 5 Closed Form Variable Fractional Time Delay Using FFT with Transition Band Trade-Off 99
5.1 Introduction…………………….…………………………………………...100
5.2 Closed Form Design Of Fractional Delay Filter With Transition Samples……103
5.3 Experimental Results…………………………………………...………………106
5.4 Conclusions…………………………………………………………………….110
Chapter 6 Discrete Hermite Functions with Dilation and Shifting Variation 113
6.1 Introduction…………………………………………………........……………..113
6.2 Construction of Shifted Dilated Discrete Hermite Functions (SDDHFs)……..115
6.3 Comparison of Shifted Dilated Discrete Hermite Functions with the Squeezed State Method…………………………………………………………………….119
6.4 Discussion of Time-Bandwidth Product of Shifted Dilated Discrete Hermite Functions……………..……………………………………………………….128
6.5 Applications in Signal Processing……………………………………………...131
6.5.1 Fractional Delay…………………………………………………………131
6.5.2 Signal Expansion………………………………………………………..135
6.6 Conclusions…………………………………………………………………....139
Chapter 7 Modified One-Dimensional Discrete Fourier Transforms 141
7.1 Introduction…………………………………………………………………….141
7.2 Preliminaries……………………………………………………………………144
7.2.1 Wigner Distribution Function (WDF)…………………………………..144
7.2.2 Linear Canonical Transform (LCT)…………………………………….145
7.2.3 Complex Linear Canonical Transform (CLCT)………………………...146
7.3 Modified One-Dimensional Discrete Fourier Transforms…………..…………147
7.3.1 Dilated DFT operation…………………………………………………..147
7.3.2 Sheared DFT operation………………………………………………….149
7.3.3 Partial-Rotated DFT operation………………………………………….151
7.4 Discussion of the Reversibility of the Modified Discrete Fourier Transform...154
7.5 Some Transformations implemented by Modified One-Dimensional Discrete Fourier Transform…………………..…………………………………………..158
7.5.1 Discrete Fractional Fourier Transform (DFrFT)………………………..158
7.5.2 Discrete Linear Canonical Transform (DLCT)…………………………165
7.5.3 Discrete Complex Linear Canonical Transform (DCLCT)…………….168
7.6 Conclusions………………………………………………….……………….…170
Chapter 8 Discrete Two-Dimensional Non-Separable Linear Canonical Transform by Chirp Operations 171
8.1 Introduction…………………………………………………………………….171
8.2 Matrix Decomposition for Non-Separable Linear Canonical Transform….……176
8.2.1 Matrix Decomposition when …………………………………...177
8.2.2 Matrix Decomposition when …………………………………178
8.3 Calculation and Digital Implementation………………………………………..182
8.4 Discrete Gyrator Transform and its Applications………………………………184
8.5 Conclusions…………………………………………………………………….188
Chapter 9 Generalized Eigensolutions in between Standard and Elegant Hermite Gaussian Functions 189
9.1 Introduction…………………………………………………………………….190
9.2 Analysis of Generalized Hermite Gaussian Functions………………………..194
9.2.1 Compact Expression for Generalized Hermite Gaussian Functions…...194
9.2.2 Differential Operator for Generalized Hermite Gaussian Functions…....195
9.2.3 Adjoint Eigenfunctions for Generalized Hermite Gaussian Function…..198
9.2.4 Normalization Constants for Generalized Hermite Gaussian Functions..200
9.3 Numerical Examples…………………………..………………………………..202
9.3.1 Generalized Hermite Gaussian Functions…………...………………….203
9.3.2 Generalized Hermite Gaussian Beams……………....…………………..207
9.4 Conclusions…………………………………………………………………….209
Chapter 10 Discrete Generalized Hermite Laguerre Gaussian Beams 211
10.1 Introduction……………………………………..…………………………….211
10.2 Generalized Hermite Gaussian Functions…………………………………….222
10.2.1 Continuous Generalized Hermite Gaussian Functions……………...222
10.2.2 Discrete Generalized Hermite Gaussian Functions…………………224
10.3 Discrete Generalized Gaussian Beams…………………………….………228
10.3.1 Discrete Generalized Hermite Gaussian Beams…………………….232
10.3.2 Discrete Generalized Laguerre Gaussian Beams……………………236
10.3.3 Discrete Generalized Hermite Laguerre Gaussian Beams………….239
10.4 Discrete Properties of Generalized Gaussian Beams…………………………244
10.5 Conclusions…………………………………………………………………...245
Chapter 11 Discrete Generalized Ince Gaussian Beams 247
11.1 Introduction……………………………………………………………………247
11.2 Previous Work………………………………………………………………...254
11.3 Discrete Generalized Gaussian Families……………………………………...257
11.3.1 Discrete Generalized Hermite Gaussian Beams…………………….257
11.3.2 Discrete Generalized Ince Gaussian Beams………………………...264
11.3.3 Discrete Properties of the Generalized Gaussian Families………….267
11.4 Conclusions…………………………………………………………………...270
Chapter 12 Discrete Laguerre Gaussian Transforms and Their Applications 273
12.1 Introduction……………………………………………………...……………273
12.2 Preliminaries…………………………………………………………………277
12.2.1 The Laguerre Gaussian Functions…………………………………..277
12.2.2 The Laguerre Gaussian Transform………………………………….278
12.2.3 Mode Conversion between Laguerre Gaussian Functions and separable Hermite Gaussian Functions…………..……………………………279
12.3 Transformation Coefficient Computation Method……………..…………282
12.3.1 Close-form Transformation Coefficients……………………………282
12.3.2 Fast Coefficient Computing using the Modified Hermite Transform..283
12.3.3 Fast Coefficient Computing using the Fast Fourier Transform……..285
12.4 Discrete Laguerre Gaussian Transforms……………….……………………...287
12.4.1 Discrete Hermite Gaussian Functions and Discrete Hermite Transforms………………………………………………………….287
12.4.2 Discrete Laguerre Gaussian Functions…………………….………..289
12.4.3 Discrete Laguerre Gaussian Transforms……………………………295
12.5 Simulations……………………………………………………………………296
12.5.1 High-Order Discrete Laguerre Gaussian Functions using Different Methods…………………………………………...………………….296
12.6 Image Processing Applications……………………………………………….299
12.6.1 Circular Pattern Keypoints Selection……………………………….299
12.6.2 Image Reconstruction…………………………………………...…..301
12.6.3 Video Object Detection………………………………………….….302
12.7 Conclusions………………………………………………………………….304
Chapter 13 Conclusions and Future Work 305
Reference 30
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Author Under Sail The Imagination of Jack London, 1893-1902
No full textIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Intro -- Title Page -- Copyright Page -- Dedication -- Contents -- Acknowledgments -- Introduction -- 1. Spirit Truth -- 2. From Absorption to Theatricality and Back Again -- 3. "I Will Build a New Present" -- 4. Sons as Authors -- 5. Fathers as Publishers -- 6. The Daughter as Author -- 7. Lovers as Authors -- 8. At Sea with the Family -- 9. Yellow News, Yellow Stories -- 10. The Return Home -- Notes -- Bibliography -- Index -- About Jay WilliamsIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Description based on publisher supplied metadata and other sources.Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, YYYY. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries
- …
