• Journal of Korea Multimedia Society
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• v.4 no.6
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• pp.543-553
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• 2001

In this paper, we proposed management strategy of medical image data in order to solve the problem in traditional medical images migration method. As management strategy of medical image data we proposed EAT(Expanded Average Transaction time) data migration method and data storing method based on temporal interrelation. In EAT data migration strategy, we define the dividing criterion which distinguish entity versions to be stored in each storage and also define entity versions to be stored in each storage. We defined degree of overlap and degree of difference for any two entity versions, and integrated those values and described method which place entity versions to storage. In order to compare the number of cluster references when we change rate of temporal queries, the number of cluster references of proposed method is smaller than that of traditional method.

• Proceedings of the Korea Information Processing Society Conference
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• 2005.11a
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• pp.271-274
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• 2005

현재 무선인터넷의 중요성이 강조되면서 모바일 단말 장치는 모바일 비즈니스 프로세스에서 중요한 역할을 담당한다. 특히 모바일 장비는 차세대 기술인 임베디드와 유비쿼터스 컴퓨팅의 주요 단말 장치이며 개발 대상이다. 앞으로 차세대 이동통신망 중심의 융합 및 이동 단말의 컴퓨팅 능력이 고도화되면 언제, 어디서나, 누구와도 모든 정보를 이용할 수 있는 고속 멀티미디어 통신 환경 즉, 유비쿼터스 환경이 구축될 것이며 향후 이러한 환경에서 모바일 컨버전스 서비스는 특정 시점의 사용자 상황에 적절한 서비스를 제공하는 상황인식의 특성을 가지게 될 것이다. 따라서, 본 논문에서는 모바일 컨버전스를 위한 상황인식 에이전트 개발을 위한 컴퓨팅 아키텍처를 정의하고 개발을 용이하기 위해 재사용 가능한 컴포넌트를 기반으로 하여 모바일 컨버전스에 대한 분석 및 설계에 관하여 제시하였다. 이를 통해 모바일 환경에서 재사용성 및 이식성과 에이전트 개발에 대한 시간과 비용에 대한 절감을 기대할 수 있다.

• Journal of the Korea Society of Computer and Information
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• v.8 no.1
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• pp.69-75
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• 2003

The Development of software Puts component of software made in advance to use to improve productivity Reuse of component can cut down on the development costs of software and reduce the development Period. By reusing component needed for software development, it can minimize risk factors from the software design to implementation We are going to Proposal the method which can promote efficiency of reuse by introducing with skill to implement the software and managing the specification using UML with version through the version management systems. The object of this study is that when the software is developed, we make software used effectively through the version management of component using UML.

• 한국IT서비스학회:학술대회논문집
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• 2005.05a
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• pp.222-230
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• 2005

컨버전스(Convergence)란 단어는 집합, 집중, 수렴, 한 곳으로 모여짐 등의 뜻을 지닌 일반적인 용어로써 매우 발전해가고 있는 IT 분야에서 다양한 수요자의 욕구와 기술의 진화에 따라 최근에 매우 빈번하게 등장하고 있는 용어이자, 중요한 화두 중에 하나가 되고 있다. 이에 단어가 지니고 있는 일반적 의미를 다각적으로 분석함과 동시에 그 의미가 정보통신분야의 기술적 측면에서 또한 활용적인 측면에서 어떤 암시와 효과를 나타내고 있고, 나아가 IT 분야의 발전을 향한 목표 지향적인 측면에서의 역할이 가능한지와 또 다른 발전과 진화에 따라 어느 정도의 생명력과 경쟁력은 지닐 수 있는지를 살펴보고자 한다. 20세기 후반에 등장한 새로운 산업의 빅뱅이 되고 있는 IT 분야가 전세계로 확산, 발전되어감에 따라 수많은 일반적인 단어와 용어 들이 정보통신분야에서 도입, 활용하였고 이러한 용어들은 단어 자체의 의미 보다는 정보통신분야 발전의 현재와 미래를 규정해왔고, 나아가 정보통신 발전에 따른 혜택을 받는 전세계와 국내의 이용자들에게 많은 변화를 제공함과 동시에 연관분야의 산업에도 긍정적이던 부정적이던지 상호간 막대한 영향을 미쳐왔다고 분석된다. 이에 본 논문 자료는 IT 전문 용어가 아닌 일반적인 용어 중에서 IT 분야의 어떤 형태로든 영향을 미칠 용어 중에서 컨버전스란 단어를 통해 IT 분야의 현주소를 사례를 중심으로 분석, 점검하고 향후 IT 분야에서 컨버전스가 적용될 미래의 발전 모습을 전망하고자 하는데 있다.

• Journal of Digital Convergence
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• v.9 no.4
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• pp.51-67
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• 2011

This research looks at the innovative product characteristics, environmental properties, and personal attitudes as antecedents of consumer's perceived usefulness and easiness of product usage. And the attitudes toward digital convergence products and its acceptability as consequences. The results indicate that relative advantage, expectation for better product, the social influence, mass communications, and attitudes toward the new technology, significantly influence the perceived usefulness. The current research revealed that perceived usefulness is more influential over perceived easiness on the formation of positive attitude toward the product. The users of digital convergence products put more weight on the availability of the product functions rather than easiness of use.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.29 no.6
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• pp.1375-1382
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• 2019

The latest version of commercial protector, Themida, has been updated, it is impossible to apply a normalized unpacking mechanism from previous studies by disable the use of a virtual memory allocation that provides initial data to be tracked. In addition, compared to the previous version, which had many values that determined during execution and easy to track dynamically, it is difficult to track dynamically due to values determined at the time of applying the protector. We will look at how the latest version of Themida make it difficult to normalize the API wrapping process by adopted techniques and examine the possibilities of applying the unpacking techniques to further develop an automated unpacking system.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.12 no.9
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• pp.1623-1632
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• 2008

In food choice, consumers consider importantly food safely and reliability focusing on a high qualify control. Also they are concerned about sustainable production and consumption considering of area and environment. In this paper, We propose and design the high-quality seafood production support system that is based on international sanitary standard haccp, traceability and eco-fiendly seafood certification for safety and reliability of the seafood production. The system is categorized into five part: aquafarm haccp, environmental control monitoring, traceability, disease prevention and messenger service and seafood price inquiry service. The proposed system utilize diverse ubiquitous-it technologies like usn, network cctv, mobile device etc.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.29 no.2
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• pp.465-472
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• 2019

In recent years, the cyber attack has become a universal phenomenon, and the attacks in cyberspace are regarded as a kind of war, cyber-warfare. However, cyber-warfare is difficult to identify the damage caused by the attack. In order to effectively evaluate the damage to the attack that may occur in the cyber-warfare, this paper describes the damage evaluation simulation of the cyber-warfare based on DEVSim++, which can calculate the damage to the cyber attack using the MOCE (Measure of Cyber Effectiveness). Also, in order to help the commander in the cyber Command&Control phase, the number of victims by attack classification is expressed in the form of Venn diagram.

• The KIPS Transactions:PartC
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• v.11C no.2
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• pp.235-244
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• 2004

TCP Vegas version provides better performance and more stable services than TCP Tahoe and Reno versions, which are widely used in the current Internet. However, in the situation where TCP Vegas and Reno share the bottleneck link, the performance of TCP Vegas is much smaller than that of TCP Reno. This unfairness is due to the difference of congestion control mechanisms of each TCP use. Several studies have been executed in order to solve this unfairness problem. In this paper, we analyze the minimum window size to maintain the maximum TCP performance of link bandwidth. In addition, we propose an algorithm which maintains the TCP performance and improves fairness by selective packet drops in order to allocate proper window size of each TCP connections. To evaluate the performance of the proposed algorithm, we have measured the number of data bytes transmitted between end-to-end systems by each TCP connections. The simulation results show that the proposed algorithm maintains the maximum TCP performance and improves the fairness.

• Journal of KIISE:Databases
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• v.30 no.1
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• pp.41-51
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• 2003

The spatiotemporal database concerns about the time-varying spatial attributes. One of the important research areas is related to the support of various location-based services in motile communication environments. It is known that database systems may be difficult to manage the accurate geometric locations of moving objects due to their continual changes of locations. However, this requirement is necessary in various spatiotemporal applications including mobile communications, traffic control and military command and control (C2) systems. In this paper we propose the $B^{st}$-tree that utilizes the concept of multi-version B-trees. It provides an indexing method (or the historical and future range query Processing on moving object's trajectories. Also we present a dynamic version management algorithm that determines the appropriate version evolution induced by the mobility patterns to keep the query performance. With experiments we .;hi)w that our indexing approach is a viable alternative in this area.