1,720,992 research outputs found
Kim Yo Han
No full text학위논문(석사)--아주대학교 정보통신대학원 :정보보호,2009. 2요 약 문
현 경계작전은 쌍안경, 야간감시경, 발성장애물 등 감시보조장비와 제한된 과학화 장비를 이용하여 실시되고 있으나, 대부분 인간의 오감에 의한 감시로 탐지의 신뢰성이 낮아 시·공간적 사각지역을 극복할 수 있는 대책이 필요하다. 따라서 본 연구에서는 RFID/USN 기술을 이용한 무인감시 시스템 구축 시 군사용으로 사용할 수 있도록 센서노드와 M/W, 보안 분야에 대한 요구사항을 도출하였다.차 례
제1장. 서 론 1
제2장. 국방 무인감시 시스템 3
2.1 고정형 시스템 4
2.2 이동형 시스템 6
2.3 센서노드의 유형별 특성 7
2.4 USN장비의 논리적 구조 9
2.4.1 센서노드 9
2.4.2 중계노드 11
2.4.3 고정형 싱크노드 12
2.4.4 이동형 싱크노드 14
제3장. 시스템 요구사항 분석 16
3.1 센서노드에 대한 요구사항 16
3.1.1 센서들의 오경보 최소화 16
3.1.2 센서노드의 위장 17
3.1.3 USN장비의 피탈 대응 18
3.1.4 주파수 잠식에 의한 센서장비들의 오작동 19
3.2 미들웨어(M/W)에 대한 요구사항 20
3.2.1 신뢰성 있는 상황도 도시 방안 20
3.2.2 장비 / 네트워크 운영 23
3.3 보안 요구사항 24
3.3.1 무인감시체계의 취약점 25
3.3.2 RFID / USN 공격 기법 27
3.3.3 무인감시체계 보안 목표 29
제4장. 결 론 32
참 고 문 헌 33Maste
Photoluminescent graphene oxide quantum dots for heavy metal ion detection combined with a microfluidic sample pretreatment
No full textIn this study, we demonstrated a simple and rapid heavy metal pretreatment microdevice that could readily and automatically perform preconcentration, purification, and release of trace metal ions from a large-volume sample. The recovered metal ions were successfully analyzed with a DNA aptamer-linked photoluminescent graphene oxide quantum dots (GOQDs) through electron transfer mediated fluorescence quenching
Thermal-Hydraulic and Aerosol Behavior Analysis of the VANAM-M3 Experiment Using the CINEMA Code
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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
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