• Proceedings of the Korean Society for Information Management Conference
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• 2017.08a
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• pp.104-104
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• 2017

연구 데이터란 과학적 연구에서 사용된 일차 자료와 연구자에 의해 직접 작성된 연구의 결과로서 수치, 문자, 이미지, 음성 등의 사실적 기록을 의미한다. 이 연구의 주제 분야인 의학은 잠재적 가치와 활용 가능성이 높고 공익적 성격을 가지고 있는 학문 분야로 의학 연구 데이터의 종류와 관리의 필요성을 통해서 그 가치와 공유 의미를 찾아보고자 한다. 또한 연구 데이터의 대표적인 임상 시험 기록과 연구 논문의 발표와 공유 현황에 대해서도 살펴보고 그 안에서 도서관의 역할이 어떤 것인가를 짚어보고자 한다. 의학 연구 데이터는 환자 진료기록, 건강 검진 기록, 임상 기록, 사망 기록, 임상 시험 기록, 유전체 정보, 연구 논문 등 그 종류와 형태가 다양하며 대용량인 경우가 많다. 의학 연구는 개인 정보보호와 윤리적인 문제 등 연구 수행 과정에서 어려운 점이 많은 성격을 가지고 있으나 질병 치료나 예방 나아가 인류의 건강과 직접적으로 관련된 학문 분야로 의학 연구 데이터의 보존과 공개, 공유를 위한 관리는 큰 의미가 있다. 의학 연구 데이터관리는 새로운 연구의 밑받침이 될 뿐만 아니라 중 저개발 국가의 연구자들에게도 큰 기회를 부여하여 세계적인 의학 발전에 기여할 수 있다. 또한 임상 시험 결과에 대한 은폐와 거짓 연구 방지에도 의미가 있어 미국뿐만 아니라 전세계적으로 학술 연구 논문 발표에 사용된 데이터는 등록하도록 규정하고 있다. 임상 시험 등록으로 공인된 사이트는 NIH의 ClinicalTrials.gov, ICTRP의 Primary Registry 등이 있으며, 우리나라에도 질병관리본부 국립보건연구원에서 관리하는 CRIS 등이 있다. 의학 연구자들은 연구의 시작부터 연구 데이터를 수집, 사용, 보존, 공유의 문제를 고려해야 하나 시간적 물리적인 문제 등으로 어려움을 겪고 있으며, 이를 지원하는 서비스는 도서관에서도 관심이 높아지고 있는 분야로 Virginia Commonwealth 대학 도서관과 Emory 대학 도서관 등에서 시도되고 있다. 이 서비스는 연구 과정에서 사서의 지원이 가능한 새로운 기회로 연구자의 데이터관리를 위한 단계별 스토리를 조직하고 DMP 작성 지원 및 교육 등을 통해서 학술 커뮤니케이션에서 새로운 역할자로 자리잡을 수 있을 것이다.

• The Transactions of the Korea Information Processing Society
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• v.7 no.4
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• pp.1082-1091
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• 2000

In Distributed Shared Memory systems, false sharing occurs when two different data items, not shared but accessed by two different processors, are allocated to a single block and is an important factor in degrading system performance. The paper first analyzes shared memory allocation and reference patterns in parallel applications that allocate memory for shared data objects using a dynamic memory allocator. The shared objects are sequentially allocated and generally show different reference patterns. If the objects with the same size are requested successively as many times as the number of processors, each object is referenced by only a particular processor. If the objects with the same size are requested successively much more than the number of processors, two or more successive objects are referenced by only particular processors. On the basis of these analyses, we propose a memory allocation scheme which allocates each object requested by different processors to different pages and evaluate the existing memory allocation techniques for reducing false sharing faults. Our allocation scheme reduces a considerable amount of false sharing faults for some applications with a little additional memory space.

• Proceedings of the Korean Information Science Society Conference
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• 2002.04a
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• pp.868-870
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• 2002

기존의 네트워크 환경에서의 서비스와 달리 OSGi 프레임워크 환경에서의 서비스는 생명 주기에 따라 동적이고, 다른 서비스와의 상호작용 등이 일어나기 때문에 거짓 오퍼레이터(OP)에 의해 인증되지 않은 악의적인 서비스가 배치될 수 있고 또한 서비스가 변질 될 수도 있다. 그러므로, 개방형 서비스 게이트웨이 (OSG)를 시동하였을 때 초기화하는 과정인 부트스트랩핑(Bootstrapping)단계에서 공유 비밀키(shared secret)를 생성, 이로부터 유도된 MAC(Message Authentication Codes) Key를 기반으로 한 서비스 번들 인증을 통하여 안전한 서비스를 제공받을 수 있어야 한다. 본 논문에서는 서비스 번들을 인증 하기 위한 키 교환 방법과 서비스 인증 메커니즘을 제시하였다. 대칭키, 공개키의 키 교환 메커니즘은 대칭키를 이용한 키 교환 메커니즘이 공개키를 이용한 것보다 더 효율적이며, 이를 이용한 MAC 기반 서비스 번들 인증 또한 기존의 PKI 기반 서비스 번들 인증보다 인증 속도가 빠르다.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.23 no.6
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• pp.1025-1035
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• 2013

There has been an explosive increase in the population of OSN(online social network) for 10 years. OSN provides users with many opportunities to have communication among friends, families and goes so far as to make relationships among unknown people having similar belief or interest. However, OSN also produced adverse effects such as privacy breaches, leaking uncontrolled information or disseminating false information. Access control models such as MAC, DAC, RBAC are applied to the OSN to control those problems but those models in OSN are not fit in dynamic OSN environment because user's acts in OSN are unpredictable and static access control imposes burden on users to change access control rules one by one. This paper proposes the dynamic trust-based access control to solve the problems of traditional static access control in OSN.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.5
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• pp.99-110
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• 2017

Improving tracking performance by estimating the status of multiple targets using radar is important. In a clutter environment, a joint event occurs between the track and measurement in multiple target tracking using a tracking filter. As the number increases, the joint event increases exponentially. The problem to be considered when multiple target tracking filter design in such environments is that first, the tracking filter minimizes the rate of false track alarmsby eliminating the false track and quickly confirming the target track. The purpose is to increase the FTD performance. The second consideration is to improve the track maintenance performance by allocating each measurement to a track efficiently when an event occurs. Through two considerations, a single target tracking data association technique is extended to a multiple target tracking filter, and representative algorithms are JIPDAF and LM-IPDAF. In this study, a probabilistic evaluation of many hypotheses in the assignment of measurements was not performed, so that the computation amount does not increase nonlinearly according to the number of measurements and tracks, and the track existence probability based on the track density The LM-IPDAF algorithm was introduced. This paper also proposes a method to reduce the computational complexity by improving the clutter density estimation method for calculating the track existence probability of LM-IPDAF. The performance was verified by a comparison with the existing algorithm through simulation. As a result, it was possible to reduce the simulation processing time by approximately 20% while achieving equivalent performance on the position RMSE and Confirmed True Track.

• Information Systems Review
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• v.18 no.2
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• pp.199-223
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• 2016

As social networking services (SNS) become widely used tools for maintaining social relationships, people use SNS to express themselves online. Users are free to form multiple characters in SNS because of online anonymity. This phenomenon causes SNS users to easily demonstrate multiple personas that are different from their identities in the real world. Therefore, this study focuses on online multi-personas that establish multiple fake identities in the SNS environment. The main objective of this study is to investigate factors that affect online multi-personas. Fake online identities can have various negative consequences such as cyber bullying, cyber vandalism, or antisocial behavior. Since the boundary between the online and offline worlds is fading fast, these negative aspects of online behavior may influence offline behaviors as well. This study focuses on teenagers who often create multi-personas online. According to previous studies, personal identities are usually established during a person's youth. Based on data on 664 teenage users, this study identifies four emotional factors, namely, closeness with others, relative deprivation, peer pressure and social norms. According to data analysis results, three factors (except closeness with others) have positive correlations with users' multi-personas. This study contributes to the literature by identifying the factors that cause young people to form online multi-personas, an issue that has not been fully discussed in previous studies. From a practical perspective, this study provides a basis for a safe online environment by explaining the reasons for creating fake SNS identities.

• Convergence Security Journal
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• v.11 no.1
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• pp.71-77
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• 2011

NCW(Network Centric- Warfare) encompasses the concept to use computer data processing and network linkage communications techniques, share information and furthermore, enhance the effectiveness of computer-operating systems. As IT(Information & Technology) have become developed in the recent years, the existing warfare system-centered conventional protocol is not use any longer. Instead, network-based NCW is being widely-available, today. Under this changing computer environment, it becomes important to establish algorithm and build the stable communication systems. Tools to identify malign node factors through Wireless Ad-hoc network cause a tremendous error to analyze and use paths of even benign node factors misreported to prove false without testing or indentifying such factors to an adequate level. These things can become an obstacle in the process of creating the optimum network distribution environment. In this regard, this thesis is designed to test and identify paths of benign node factors and then, present techniques to transmit data through the most significant open short path, with the tool of MP-SAR Protocol, security path search provider, in Ad-hoc NCW environment. Such techniques functions to identify and test unnecessary paths of node factors, and thus, such technique users can give an easy access to benign paths of node factors.

• Journal of Korea Entertainment Industry Association
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• v.13 no.6
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• pp.123-133
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• 2019

Director Lee Chang-dong saying that the most important thing is to let the audience experience, find its meaning, interpret, and feel the pure sensation (whether it's image, sound or music) that the film has instead of narrative giving you the answers, through the film presenting the pure natural landscape as it is, but all the familiar things that can be taken as a riddle are conveyed in images, and all the elements that make up the film share its presence with each other and let us experience a mysterious weight of reality that cannot be defined through its strange symbolism and metaphors, and it reflects various human emotions, reflecting curiosity of reality, the words that are hardly spoken, meanings of life that we were not being aware of. Rather than having one definitive figure, through the character's personality expressing an imperfect character with a complex ambiguous behavior asks about the things that can't be explained logically and the fact of life that can't be divided into truth or lie. Also, the acting approaches emotionally and primitively rather than using artificial expressions, showing the invisible elements of emotions that are latent inside humans through temperate acting style, leads the audience to distant themselves and reflect more deeply into life. This study analyzed the characters and acting of the film based on director Lee Chang-dong's directing style.

• The Korean Journal of Archival Studies
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• no.79
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• pp.5-32
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• 2024

The Korean government ranked 3rd among 193 UN member countries in the UN's 2022 e-Government Development Index. Korea, which has consistently been evaluated as a top country, can clearly be said to be a leading country in the world of e-government. The lubricant of e-government is data. Data itself is neither information nor a record, but it is a source of information and records and a resource of knowledge. Since administrative actions through electronic systems have become widespread, the production and technology of data-based records have naturally expanded and evolved. Technology may seem value-neutral, but in fact, technology itself reflects a specific worldview. The digital order of new technologies, armed with hyper-connectivity and super-intelligence, not only has a profound influence on traditional power structures, but also has an a similar influence on existing information and knowledge transmission media. Moreover, new technologies and media, including data-based generative artificial intelligence, are by far the hot topic. It can be seen that the all-round growth and spread of digital technology has led to the augmentation of human capabilities and the outsourcing of thinking. This also involves a variety of problems, ranging from deep fakes and other fake images, auto profiling, AI lies hallucination that creates them as if they were real, and copyright infringement of machine learning data. Moreover, radical connectivity capabilities enable the instantaneous sharing of vast amounts of data and rely on the technological unconscious to generate actions without awareness. Another irony of the digital world and online network, which is based on immaterial distribution and logical existence, is that access and contact can only be made through physical tools. Digital information is a logical object, but digital resources cannot be read or utilized without some type of device to relay it. In that respect, machines in today's technological society have gone beyond the level of simple assistance, and there are points at which it is difficult to say that the entry of machines into human society is a natural change pattern due to advanced technological development. This is because perspectives on machines will change over time. Important is the social and cultural implications of changes in the way records are produced as a result of communication and actions through machines. Even in the archive field, what problems will a data-based archive society face due to technological changes toward a hyper-intelligence and hyper-connected society, and who will prove the continuous activity of records and data and what will be the main drivers of media change? It is time to research whether this will happen. This study began with the need to recognize that archives are not only records that are the result of actions, but also data as strategic assets. Through this, author considered how to expand traditional boundaries and achieves reterritorialization in a data-driven society.