• Journal of KIISE:Software and Applications
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• v.26 no.12
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• pp.1445-1454
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• 1999

광역 조건식의 계산은 분산 프로그램의 수행을 테스트 또는 디버깅하기 위한 방법으로 활 발히 연구되고 있다. 이제까지 주로 연구된 광역조건식은 AND 또는 OR 광역 조건식 등이 있는데, 특히 AND 광역 조건식은 분산 프로그램의 동시적 조건을 표현하는데 유용하여 효율적인 검색 알고리즘이 활발히 연구되었다. 분산프로그램의 수행오류로서 공유자원의 배타적 접근조건은 가장 중요하고 일반적인 경우라 할 수 있다. 본 논문에서는 XOR 연산을 이용하여 공유자원 프로그램의 오류 검색을 위한 광역조건식을 기술하는 방식에 대해 제안하였다. XOR 연산을 이용한 광역 조건식은 연산자 중 많아야 하나의 지역조건식만이 참일 때 전체 조건식이 참이 되는데 이러한 성질은 여러 프로세스 중 한번에 하나만이 공유자원에 배타적으로 접근할 수 있는 조건을 표현하는데 매우 유용하다. n 개의 프로세스로 이루어진 분산프로그램에서 한개의 공유자원에 대한 배타적 접근 조건을 기술하기 위해서 AND로 연결된 광역조건식을 이용하면 O(n2)개의 광역 조건식이 필요한데 반해 XOR 연산으로는 하나의 조건식으로 나타낼 수 있다. 더구나 XOR 연산을 이용한 광역조건식은 최근 소개된 겹치는 구간의 개념을 활용하면 매우 간단하게 검색할 수 있다. 본 논문에서는 겹치는 구간을 찾는 검색 알고리즘을 소개하고 증명하였다.Abstract Detecting global predicates is an useful tool for debugging and testing a distributed program. Past research has considered several restricted forms of predicates, including conjunctive or disjunctive form of predicates. Especially, conjunctive predicates have attracted main attention not only because they are useful to describe simultaneous conditions in a distributed program, but also because it is possible to find algorithms to evaluate them within reasonable time bound. Detecting errors in accessing shared resources are the most popular and important constraints of distributed programs. In this paper, we introduced an exclusive OR predicates as a model of global predicates to describe shared resource conditions in distributed programs. An exclusive OR predicate holds only when at most one operand is true, which is useful to describe mutual exclusion conditions of distributed programs where only one process should be allowed to access the shared resource at a time. One exclusive OR predicate is enough to describe mutual exclusion condition of n processes with one shared resource, while it takes O(n2) conjunctive predicates. Moreover, exclusive OR condition is easily detectable using the concept of overlapping intervals introduced by Venkatesan and Dathan. An off-line algorithm for evaluating exclusive OR global predicates is presented with a correctness proof.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.21 no.4
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• pp.205-215
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• 2010

This study has extracted the basic component of the Library Course Pages through case studies of the Library Course Pages Service, and examined the staus quo of the Open Course Ware(OCW) for the sharing of the course materials. The study has also designed and established a ontology-based retrieval system model that is capable of semantic-based retrieval of the course materials in colleges. A comparison between and analysis of the past keyword search results was conducted to evaluate the model. Through evaluation, the study concluded that the ontology-based system was more effective than the keyword search method in both retrieval result and material sharing between the institutions.

• Journal of the Korea Society of Computer and Information
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• v.11 no.5 s.43
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• pp.29-37
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• 2006

The distributed system is used that it's features of the fault tolerance and good performances. One of the distributed systems, a peer-to-peer tech, has high availability to share resources. However when peers wanna share resources, it isn't online like the peer using resources of the search time. Therefore we usually use the re-transmission method to download all resources. It's not good at the performance of the peer-to-peer system so we need to good solution. In this study, we wanna use the peer-to-peer system with the partner peer that works same download method simultaneously. We wanna have the effective performance to reduce the search stage additionally.

• Proceedings of the Korea Information Processing Society Conference
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• 2011.11a
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• pp.185-187
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• 2011

전통적인 가상화 기술들은 하나의 물리 머신에서 서로 다른 운영체제들을 동작시키기 위해 여러 개의 가상 머신을 제공하고 있다. 이러한 가상화 기술들은 운영체제를 소스 수정없이, 혹은 약간의 수정만으로 물리 머신에서 동작하는 것과 동일한 방식으로 동작할 수 있도록 지원하기 때문에 호스트와 게스트 간의 깊은 시멘틱 갭을 발생시킨다. 이러한 시멘틱 갭은 여러 컴퓨팅 자원에 대한 공간 중복과 접근 중복의 중요한 원인이 되고, 이러한 자원 중복은 대규모 가상화 시스템의 확장성에 제약한다. 이러한 자원 중복을 제거하기 위해 컨텐츠 기반 페이지 공유 등 다양한 연구들이 진행되어 왔지만 운영체제 수정없이 지원하는 정책으로 인한 시멘틱 갭은 여전히 제안 기법들을 제한하게 된다. 이에 우리들은 운영체제의 자원 관리 부분을 수정하여 근본적인 시멘틱 갭을 제거함으로써 메모리와 스토리지의 공간 및 접근 중복성을 제거할 수 있는 파일시스템을 제안하였다. 그리고 실험을 통해 기존의 가상 블록 장치를 사용하는 파일시스템과 비교 및 평가하여 제안 시스템이 페이지 캐시 공유 및 스토리지 접근 중복 제거에 효과적임을 입증하였다.

• Microbiology and Biotechnology Letters
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• v.49 no.3
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• pp.269-282
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• 2021

Following enforcement of the Nagoya Protocol (NP), in which the sovereign rights to genetic resources of countries are recognized, new legal obligations regarding access and benefit-sharing (ABS) that did not exist before have now been imposed on researchers. To implement the NP, many countries are introducing new procedures and regulations when a researcher wants to obtain genetic resources for commercial or noncommercial uses. It is therefore expected that resource-rich countries will adopt strong regulations to protect their genetic resources. In this regard, Korean microbiologists will need to respond to these changes to minimize the potential damages caused by the ABS. This paper reviews the key contents of the NP to raise its awareness among scientific researchers and further presents specific measures to meet the ABS obligations accordingly. For example, Korean researchers, in principle, do not need to acquire Prior Informed Consents (PICs) when they access Korean microbial resources for both commercial or research purposes. Nevertheless, when a foreign culture collection agency such as DSMZ requests a confirmation of compliance with the NP to deposit genetic resources, Korean researchers can also apply for a PIC with the Korean government as an exception. By referring to this article, microbiologists will be able to conduct their research in compliance with the NP while respecting the legal ABS obligations of each resource-providing country.

• Journal of Digital Convergence
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• v.16 no.4
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• pp.69-77
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• 2018

In this study, we examine the relationship between shared leadership and innovation behaviors of the members, and try to understand what moderate effect trust in these relationships. To do this, we set up research models and hypotheses that shared leadership will influence innovative behavior through literature review. We also added the moderating effect of Trust on the relationship between these variables. For the empirical analysis, a questionnaire survey was conducted for corporate member in Daegu and Kyungbuk area. Multiple regression analysis and hierarchical regression analysis were conducted to test hypotheses. As a result, Shared leadership has a significant effect on innovation behavior. In particular, trust among members has been shown to regulate the relationship between shared leadership and innovation behavior. The results of this study will be applied to the strategic human resources management of major organizations.

• Journal of Satellite, Information and Communications
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• v.5 no.2
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• pp.57-63
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• 2010

Many efficient frequency sharing methods are issued in present because of increasing users with various wireless communication terminals. In the satellite communications, the service coverage is generally very wide so frequency sharing with terrestrial system is essentially needed, and the research is progressing dynamically related on this frequency sharing method. But if we adopt the terrestrial system which is commonly used, it can't avoid the interference from terrestrial service to satellite service. Therefore, this paper will introduce methods for reducing the interference from terrestrial station to earth station using cognitive radio system Satellite system is guaranteed with decreasing interference from terrestrial stations using Genetic Algorithm based power control method. Furthermore, terrestrial systems can have increased QoS because the frequency reuse factor in proposed method is higher than existing methods.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2022.10a
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• pp.436-438
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• 2022

National Research Data Commons aims to build a system that can be used jointly by arranging analysis resources such as computing infrastructure, software, toolkit, API, and services used for data analysis together with research data to maximize the use of research data. do. The sharing and utilization system for publications and research data in the R&D process is well known. However, the environment in which data and tightly coupled software and computing infrastructure can be shared and utilized is insignificant and there is no management system. In this study, a data model is designed to systematically manage information on digital research resources required in the data-oriented R&D research process. This will be used to register and manage digital research resource information in the National Research Data Commons Service.

• Journal of Scientific & Technological Knowledge Infrastructure
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• s.10
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• pp.2-11
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• 2002

현재 국내에는 약 10만여종의 생물자원 종을 보유하고 있고, 이중에서 3만여종이 파악이 된 실정이다. 그러나 지리적인 특성상 국내에서 알려지는 종들 대부분 일본이나 중국에서도 존재하는 것이 대부분이기 때문에 고유한 생물자원 정보는 미약한 실정이다. 이러한 현실 속에서 데이터베이스 구축 뿐만 아니라 정보의 가공을 통한 지식화 및 범세계적인 정보 공유를 이끌어내야 한다. 왜냐하면, 정보는 데이터들의 속에서 얻어지는 것이며, 지식은 정보들 속에서 얻어지는 것이기 때문에 독립된 생물자원 정보를 구축하여야 하고, 또한 경쟁력 우위를 확보하기 위해서는 표준화를 기반으로 정보화를 추진하고 구축된 정보들을 분석하여 지식화하는 과정이 필요하다.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.23 no.1
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• pp.131-151
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• 2012

Recently scholarly information service institutes as well as public institutes have provided their holding resources to the other institutes and end users in order to reuse the information and create new value. Information providing subjects should stipulate the dissemination policy of digital contents for ensuring its consistent and efficient service. This study aims to establish the dissemination policy of digital contents for scholarly information service institutes focusing on NDSL. This study researches and analyzes the cases of the digital contents service policy and the dissemination policy to draw main components of the policy for NDSL. As a result, this study suggests goals and objectives, target users, coverage, dissemination methods, requests, agreement and MOU of utilization for the dissemination policy of NDSL.