1,720,955 research outputs found
The Cost of Robustness: Tighter Bounds on Parameter Complexity for Robust Memorization in ReLU Nets
No full textWe study the parameter complexity of robust memorization for ReLU networks: the number of parameters required to interpolate any given dataset with ϵ-separation between differently labeled points, while ensuring predictions remain consistent within a µ-ball around each training sample. We establish upper and lower bounds on the parameter count as a function of the robustness ratio ρ = µ/ϵ. Unlike prior work, we provide a fine-grained analysis across the entire range ρ ∈ (0, 1) and obtain tighter upper and lower bounds that improve upon existing results. Our findings reveal that the parameter complexity of robust memorization matches that of non-robust memorization when ρ is small, but grows with increasing ρ
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
Improving F2FS write performance for large files on ZNS SSD through checkpoint I/O parallelization
No full text학위논문(석사) -- 서울대학교대학원 : 공과대학 컴퓨터공학부, 2024. 2. 염헌영.본 논문에서는 멀티 코어 시스템 환경에서 F2FS(Flash-Friendly File System) 파일 시스템의 성능 문제를 다룬다. F2FS는 로그 구조 파일 시스템 중 하나로 존 (zone) 안에서 sequential write만을 지원하는 ZNS(Zoned Namespace SSD)에 적 합한 파일시스템이다. 멀티 코어 시스템은 여러 코어들을 활용해 높은 처리량을 제공하는 장점이 있으나, 로컬 파일 시스템 사용 시 코어들이 메타데이터 자료 구조를 공유함으로써 발생하는 락 컨텐션 문제로 인해 파일 시스템의 확장성이 저해되는 문제가 있다. F2FS 파일시스템에서 메타데이터 자료구조에 대한 락 컨 텐션 문제로 인해 여러 코어들이 락으로 블락되어 파일 시스템 전체의 확장성이 저하되는 문제가 있다. F2FS 파일시스템에서 대용량 파일을 생성하면 인덱스 자 료 구조를 보호하는 락에 대한 컨텐션이 발생해 I/O 성능이 53%가량 떨어져 성능 저하를보인다.논문에서는멀티코어환경에서대용량파일을생성했을때의문제 점이 파일 인덱스 구조에 대한 락으로 인해 발생함을 밝혔다. 파일 인덱스 구조는 read/write 세마포어로 보호되는데, read/write 세마포어의 특징으로 read는 여러 프로세스가 동시에 수행할 수 있지만, write는 단일 프로세스만 수행할 수 있다는 특징을 가지고 있다. 이에 본 논문에서는 세마포어에 대해 write 연산을 수행하는 체크포인트 프로세스를 다중 스레드로 병렬화했다. 이 접근 방식은 락 보유 시간 을 줄이고, 락 컨텐션 문제를 완화시키며, 최종적으로 write 처리량을 최대 20% 까지 향상시킨다. 이 연구는 멀티 코어 시스템에서 F2FS 파일 시스템의 성능을 개선하고, 고성능 스토리지 시스템의 설계 및 구현에 기여를 한다.제 1 장 서 론
제 2 장 배 경 지 식
2.1 ZNS 인터페이스
2.2 F2FS 파일시스템
2.2.1 F2FS 파일시스템의 구조
2.2.2 F2FS 파일시스템의 체크포인트
2.2.3 F2FS 파일시스템의 인덱스 구조와 락
2.2.4 F2FS 인덱스 구조에서의 락 컨텐션
제 3 장 문제 정의 및 분석
3.1 문제 정의
3.1.1 F2FS 인덱스 구조에서 발생하는 락 컨텐션
3.2 문제점 분석
제 4 장 본 론
4.1 모델 구현
4.2 Write-back 과정
제 5 장 실 험
5.1 실험 환경
5.2 성능 평가 및 분석
5.2.1 Multi-threaded F2FS와 Baseline F2FS의 비교
5.2.2 Multi-threaded F2FS의 처리량 성능 평가
제 6 장 결 론석
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
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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