• 음성과학
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• 제15권4호
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• pp.67-81
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• 2008

The accuracy rate of P2G (Phoneme-to-Grapheme) is one of the important factors determining the quality of unlimited voice recognition (VR) systems. Few studies were, however, conducted to reduce ambiguities of a phoneme string which can be segmented into a variety of different linguistic units (i.e. morphemes, words, eo-jeols), thus be transformed into more than one grapheme string. This paper is a preliminary research for building a large knowledge base of those homonymic & heterographic units(HHUs), which will provide unlimited Korean VR systems with more accurate P2G information. This paper analyzes 2 main factors generating HHUs: (1) boundary determination of the prosodic unit; (2) its segmentation into linguistic units. In this paper, linguistic characteristics determining variable boundaries of a prosodic unit are investigated, and the ambiguity types of HHUs are classified in accordance with their morphological and syntactic structures as well as with the phonological rules governing them.

• 정보보호학회논문지
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• 제13권2호
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• pp.41-47
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• 2003

사용자 취소 기법은 멀티캐스트 환경에서 그룹의 동적인 변화에 대한 그룹키의 갱신을 의미한다. 이 논문에서는 그룹 사용자의 그룹키 복호화 계산 비용을 줄이기 위해, 이전에 제안되었던 사용자 취소 기법의 두 가지 변형을 제안한다. 또한 제안된 기법은 무제한 사용자 취소를 위한 방법이기도 하다.

• 정보보호학회논문지
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• 제11권5호
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• pp.31-42
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• 2001

브로드캐스트 암호화 기법에는 두 가지 중요한 요구사항이 있다. 하나는 공모자 추적 가능성이며 다른 하나는 추적된 공모자의 탈퇴 가능성이다. 이 논문에서는 공모자의 권한을 박탈하는데 있어서 그 인원수가 제한되지 않는 새로운 형태의 공모자 추적 기법을 제안하고자 한다. 더불어 좀 더 효율적이고 간단한 자기 방지 기법에 대해 소개한다. 또한 제안한 암호화 기법을 변형하여 적응-선택 암호문 공격에 안전한 방법을 구현한다.

• 디지털융복합연구
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• 제18권9호
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• pp.331-336
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• 2020

본 연구는 구독 서비스 중 '무제한형 구독 서비스'의 사용자 경험 만족도 요인을 측정하고, 경제적 문화적 관점을 토대로 분석하는 데 목적이 있다. 해당 서비스를 사용해본 경험이 있는 20-30대를 모집하였고, 피터 모빌(Peter Morville)의 허니콤 모형을 재구성하여 작성한 질문을 통해 설문조사를 시행하였다. 설문 결과, 경제적 관점에서는 서비스 가격과 이용 시간에 대한 가성비 및 구독 유입의 용이성이 만족도 주요 요인이었으며, 문화적 관점에서는 서비스에 대한 친근감과 믿음 및 주변 사람들과의 콘텐츠 공유 경험이 주요 만족 요인이었다. 따라서 구독 서비스의 사용자 경험 만족도는 일차적으로 경제적 만족도가 먼저 충족되어야 문화적 만족도 충족으로도 이어진다는 것을 추론할 수 있다. 본 연구는 무제한형 구독 서비스의 사용자 경험이나 만족도 요인에 관한 연구의 자료로써 활용되기를 기대한다.

• 한국음향학회:학술대회논문집
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• 한국음향학회 1994년도 제11회 음성통신 및 신호처리 워크샵 논문집 (SCAS 11권 1호)
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• pp.334-337
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• 1994

본 논문에서는 형식형태소 사전 및 1300여 단어의 발음예외 사전을 이용하여 무제한 dam성합성을 위한 전처리과정을 구현하였으며, 문자열 정형화부, 형식셩태소 중심의 문장분석 및 자소단위의 음운변동과정에 관하여 논한다.

• 대한산업공학회지
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• 제8권1호
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• pp.61-67
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• 1982

This paper is concerned with the optimal control of dynamic expansion and operation of a single capacity under deterministic demand. Three cases of financing mode are considered : unlimited borrowing, debt aversion, and self financing. Using the net revenue as the objective function, the optimal paths of production and investment are analytically derived.

• 광산업정보
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• 통권9호
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• pp.10-17
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• 2002

고휘도 발광 다이오드 시장은 지난 5년 동안 연평균 58%의 성장을 거듭해 2000년에는 12억달러에 이르렀고 전체 발광 다이오드 시장의 42%를 차지했다. 시장 조사 전문 회사인 Strategies Unlimited사가 최근에 발표한 보고서'High Brightness LED Maket Review and Forecast 2001'에 따르면 이러한 성장은 향후 5년동안에도 계속되어 2005년에는 34억 달러에 이를 전망이라고 한다.

• 항공우주정책ㆍ법학회지
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• 제12권
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• pp.36-65
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• 2000

The Montreal Convention markedly changed the rules governing the international carriage by air of passenger, baggage and cargo. The introduction of a considerable number of modernized major elements including electric ticketing system, the unlimited passenger liability regime and a supplementary (fifth) jurisdiction should help to remove aged scheme that now exists in the Warsaw Convention and other related instruments. The key issue of the electric ticketing system recognized by the Convention IS how to describe reasonably and adequately the terms of written notices, in the light of the principle of consumer protection. Regarding liability regime for passengers, an unlimited passenger liability regime is realized. The carrier, in the first tier, is subject to a strict liability regime of up to 100,000 SDRs, and in the second tire, a regime of presumed fault liability without numerical liability limits. To add to the present four fora, the fifth forum is permitted. Regarding damage resulting the death or injury of a passenger, an action for damages may also be brought in its home territory with the considerably qualified narrow requirements. A strange deviation from the well-established "Procedure for Approval of Draft Convention" carried out by the Legal Committee left a considerable number of unrefined and incomplete passages. In the near future, their modification should be required.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제14권1호
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• pp.382-403
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• 2020

Steganography is the art of concealing the existence of a secret data in a non-secret digital carrier called cover media. While the image of steganography methods is extensively researched, studies on other cover files remain limited. Videos are promising research items for steganography primitives. This study presents an improved approach to video steganography. The improvement is achieved by allowing senders and receivers exchanging secret data without embedding the hidden data in the cover file as in traditional steganography methods. The method is based mainly on searching for exact matches between the secret text and the video frames RGB channel pixel values. Accordingly, a random key-dependent data is generated, and Elliptic Curve Public Key Cryptography is used. The proposed method has an unlimited embedding capacity. The results show that the improved method is secure against traditional steganography attacks since the cover file has no embedded data. Compared to other existing Steganography video systems, the proposed system shows that the method proposed is unlimited in its embedding capacity, system invisibility, and robustness. The system achieves high precision for data recovery in the receiver. The performance of the proposed method is found to be acceptable across different sizes of video files.

• 한국산업보건학회지
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• 제23권4호
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• pp.374-383
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• 2013

Objectives: The major objective of this study is to review overall and in detail the Corporate Manslaughter and Corporate Homicide Act 2007 in the U.K.and the principal contents of this act. Methods: A variety of articles related to the background and circumstances under which the legistration was enacted and the details of this act were investigated and analyzed. Results: In enacting Corporate Manslaughter and Corporate Homicide Act 2007, legislators mainly took elements of legal culture into account and focused on seeking to broaden the law on corporate manslaughter. An indictable offence is considered to have been committed if the way in which an organization's activities are managed or organised causes a person's death and amounts to a gross breach of the relevant duty of care owed by the organization to the deceased. The way in which its activities are managed or organized by its senior management is a substantial element in the breach. Upon conviction, a corporation may be ordered to remedy any breach, publicize its failures, or be given an unlimited fine. Conclusions: The enactment background and details of Corporate Manslaughter and Corporate Homicide Act 2007 is understood accurately. On the basis of the findings, it is necessary to heighten effectiveness of punishment.for senior management or corporations that cause a person's death in Korea.