1,720,955 research outputs found
디지털 집약적 연속시간 델타-시그마 모듈레이터 구조 설계
No full text학위논문(박사) - 한국과학기술원 : 전기및전자공학부, 2025.2,[iv, 52 p. :]This dissertation explores digital-intensive continuous-time (CT) delta-sigma modulator (DSM) architectures, a concept that is rarely studied compared to existing approaches. It focuses on employing SAR-assisted digital noise coupling (DNC), which shifts most analog processing to the digital domain. By processing residues digitally and leveraging the digital-friendly nature of the SAR quantizer, the DNC architecture fully benefits from technology scaling, as well as from improved area and power efficiency, robustness, and flexibility. The first part of this work addresses the unwanted quantization noise inherent in the DNC architecture through the hybrid noise coupling technique. Fabricated in a 28-nm CMOS process, the prototype demonstrates a 5-dB improvement in SNDR compared to DNC-only implementations, without introducing significant hardware complexity. It consumes 0.22 mW at a 1.8-V supply, achieving an SNDR of 95.8 dB and a DR of 101.8 dB at a bandwidth of 15.625 kHz. To further enhance power efficiency, a digital adder-free 3rd-order DNC filter, combined with a digital back-end integrator, is proposed. This innovation enables a single-opamp, digital-intensive, 4th-order CT DSM to achieve 3rd-order noise shaping using only delay cells, representing the highest noise-coupling filter order implemented to date. Fabricated in a 28-nm CMOS process, this design demonstrates state-of-the-art performance and robustness across multiple samples, process corners, and power supply variations, with only a 0.5-dB SNDR deviation under all conditions. As a result, this work achieves one of the best energy efficiencies among state-of-the-art DSMs in a 200-kHz bandwidth, featuring the highest Schreier Figure of Merit (FoM) of 179.2 dB and the lowest Walden FoM of 37.7 fJ/conv. step, while consuming only 0.31 mW at a 1-V supply. These results imply that the proposed architecture can be a strong candidate for advanced technology nodes with reduced supply voltages.한국과학기술원 :전기및전자공학부
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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