• 한국정보과학회논문지:소프트웨어및응용
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• 제34권8호
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• pp.731-742
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• 2007

다양한 환경에 배치될 수 있고, 예상치 못한 상황에 자주 접할 수 있는 지능형 서비스 로봇의 경우에는 처할 수 있는 환경과 상황을 모두 예측하여 로봇 내부에 필요한 기능을 모두 가지고 있기 어렵다. 로봇에게 환경에 맞는 필요한 기능만 내부에 가지고 있을 수 있게 하고, 필요에 따라 새로운 기능을 획득할 수 있도록 지원해 주기 위한 기반 기술인 컴포넌트 저장소가 본 논문의 주제이다. 이 저장소를 실제 로봇 플랫폼에 적용 실험 해 온 결과, 로봇이 일일이 외부 저장소들을 접근함에 따라 필요한 컴포넌트의 검색 및 획득의 성능이 저하된다는 문제와, 가용한 컴포넌트 저장소가 늘어감에 따라 확장성, 공유성 문제가 발견되었다. 본 연구에서는 이러한 문제점들을 해결하기 위해 분산된 컴포넌트 저장소들을 컴포넌트의 기능적인 측면에 따라 논리적인 그룹으로 묶은 셀 기반의 진화적인 컴포넌트 저장소를 개발하였다. 프로토타입을 개발하여 실험한 결과, 셀 기반의 저장소를 이용하여 로봇이 분산된 저장소를 일일이 물리적으로 접근하는 것이 아니라 논리적으로 투명하게 접근을 할 수 있도록 지원한다. 또한, 로봇 컴포넌트/애플리케이션 개발자들이 자신의 접근 가능한 저장소를 변경하면 전체 저장소 시스템에 반영되어 다른 개발자들이나 로봇이 사용할 수 있게 해 주는 컴포넌트의 투명한 공유를 지원한다.

• 무역상무연구
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• 제34권
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• pp.157-185
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• 2007

The purpose of this thesis is to contribute to the activation of e-contract service for one stop e-trade by analyzing the problems and its solutions in e-contract service at home and abroad. In order to achieve the purpose of this thesis, case studies are done on e-contract service providers such as CECTRUST service of NTT DATA in Japan and HanCM.com of Haansoft in Korea and user companies such as Taisei Corporation using CECTRUST service and Hyundai Card using HanCM.com. The problems in the e-contract service are the lack of e-contract service providers, rare publicity of e-contract service, limited use of e-contract service at only home, higher pricing for e-contract service, short time management of e-contract documents by service providers, no application of newly developed security technology to e-contract service, unsatisfaction of requirements of e-contract service provider as trusted third party, absence of lower pricing e-contract service by service provider, authorizing key error in electronic signature under recognized authentication system in case of fail in renewal of digital certificate and reproduction of digital certificate. The solutions of these problems are the upbringing of e-contract service providers, broad publicity of e-contract service, development of e-contract service on a global basis, establishment of lower pricing for e-contract service, long time management of e-contract documents by service providers, application of newly developed security technology such as bio technology to e-contract service, satisfaction of requirements of e-contract service provider as trusted third party by designation of recognized e-document repository, development of lower e-contract service by way of application service provider(ASP), introduction of time stamping of e-contract document and signature key value. The limitation of this thesis is that the problems and its solutions could not meet with the broad recognition as they are conferred by intuition because of few e-contract service provider.

• 방사성폐기물학회지
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• 제14권2호
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• pp.157-168
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• 2016

방사성폐기물용기의 설계는 용도 (운반, 저장, 처분)의 안전요건에 부합돼야 할 뿐 아니라 경제성과 기술적 기준도 만족해야 한다. 이러한 기준은 장차 원전해체로부터 발생할 다량의 저준위/극저준위 해체폐기물의 관리에도 해당된다. 해체폐기물의 특성은 원전운영에서 발생하는 방사성폐기물과는 매우 다르므로 적합한 용기의 개발이 요구된다. 이 논문은 다목적용도의 표준용기 개발을 제시한다. 이 개념은 경주처분장과 같은 국가 인프라를 고려한 원전해체폐기물의 관리를 최적화하기 위한 용기이다. 이 연구는 일련의 시제품을 설계 또는 제작한 것이다 : 극저준위용 소프트백, 저준위용 금속용기 (해상운반용 표준 IP2 용기 및 도로운반용 ISO 용기), 이들 용기 설계의 안전성 분석을 위한 시뮬레이션 및 시험결과는 규제요건에 잘 부합되는 것으로 나타났다. 콘크리트 용기의 후속개발은 2016년에 수행예정이다.

• 디지털콘텐츠학회 논문지
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• 제12권4호
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• pp.501-510
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• 2011

다양한 의료서비스를 정형화되고 효율적인 방법으로 제공하기 위하여 최근 의료기관의 전자의무기록 시스템의 도입이 활발하다. 그러나 국내에서 개발된 대부분의 전자의무기록시스템은 자료수집원 기반의 방식으로 개발되어 왔다. 이러한 시스템들은 시스템 아키텍처와 소프트웨어 프로세스의 태생적인 한계로 인해 전자의무기록시스템의 도입이 추구하는 다양한 목표를 충족시키지 못하고 있다. 이러한 한계를 극복하기 위해 본 연구는 수집원 지향 방식으로 획득한 의무기록 콘텐츠와 문제지향 방식으로 획득한 의무기록 콘텐츠를 융합할 수 있는 시스템 아키텍처와 이러한 시스템을 구축하기 위한 최적화된 소프트 웨어 프로세스를 제시하였다. 이를 위해 문제지향식 의무기록 생성을 위한 진료 과정과 데이터 요구사항을 분석한 후 진료데이터저장소, 문제목록 데이터베이스, 동기화 모듈 등으로 구성되는 아키텍처와 나선형 소프트웨어 프로세스를 제시하고 프로토타입을 개발하였다.

• 한국중재학회지:중재연구
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• 제9권1호
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• pp.367-390
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• 1999

The basic requirements for conducting electronic commerce include confidentiality, integrity, authentication and authorization. Cryptographic algorithms, make possible use of powerful authentication and encryption methods. Cryptographic techniques offer essential types of services for electronic commerce : authentication, non-repudiation. The oldest form of key-based cryptography is called secret-key or symmetric encryption. Public-key systems offer some advantages. The public key pair can be rapidly distributed. We don't have to send a copy of your public key to all the respondents. Fast cryptographic algorithms for generating message digests are known as one-way hash function. In order to use public-key cryptography, we need to generate a public key and a private key. We could use e-mail to send public key to all the correspondents. A better, trusted way of distributing public keys is to use a certification authority. A certification authority will accept our public key, along with some proof of identity, and serve as a repository of digital certificates. The digital certificate acts like an electronic driver's license. The Korea government is trying to set up the Public Key Infrastructure for certificate authorities. Both governments and the international business community must involve archiving keys with trusted third parties within a key management infrastructure. The archived keys would be managed, secured by governments under due process of law and strict accountability. It is important that all the nations continue efforts to develop an escrowed key in frastructure based on voluntary use and international standards and agreements.

• Nuclear Engineering and Technology
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• 제38권6호
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• pp.505-534
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• 2006

Ensuring sufficient supplies of clean, economic and acceptable energy is a critical global challenge for the 21st century. There seems little alternative to a greatly expanded role for nuclear power, but implementation of this option will depend on ensuring that all resulting wastes can be disposed of safely. Although there is a consensus on the fundamental feasibility of such disposal by experts in the field, concepts have to be developed to make them more practical to implement and, in particular, more acceptable to key stakeholders. By considering global trends and using illustrative examples from Japan, key areas for future R&D are identified and potential areas where the synergies of international collaboration would be beneficial are highlighted.

• 한국BIM학회 논문집
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• 제9권2호
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• pp.11-20
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• 2019

The use of drones and laser scanners have the potential to drastically reduce the time and costs of conventional techniques employed for field survey of cultural heritage buildings. Moreover, point cloud data can be utilized to create an as-built Building Information Model (BIM), providing a repository for consistent operations information. However, BIM creation is not a requisite for heritage buildings, and their technological possibilities and barriers have not been documented. This research explored the processes required to convert a heritage university building to a BIM model, using existing off-the-shelf software applications. Point cloud data was gathered from drones for the exterior, while a laser scanner was employed for the interior of the building. The point clouds were preprocessed and used as references for the geometry of the building elements, including walls, slabs, windows, doors, and staircases. The BIM model was subsequently created for the individual elements using existing and custom libraries. The model was used to extract 2D CAD drawings that met the requirements of Korea's heritage preservation specifications. The experiment showed that technical improvements were needed to overcome issues of occlusion, modeling errors due to modeler's subjective judgements and point cloud data cleaning and filtering techniques.

• 한국콘텐츠학회논문지
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• 제22권10호
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• pp.754-764
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• 2022

코드 리팩토링은 소프트웨어 시스템의 코드를 변경함으로써 새로운 요구사항 반영, 버그 수정, 코드 구조화 등을 달성하기 위한 유지보수 활동이다. 리팩토링 유형, 리팩토링 효과, 지원 도구 등에 관한 다양한 연구가 진행 중이다. 하지만, 많은 연구들이 자바 응용들을 대상으로 하고 있으며 파이썬 응용에 관한 리팩토링 연구는 사례가 많지 않다. 본 논문은 파이썬으로 개발된 딥러닝 시스템을 대상으로 단일 리팩토링과 복합 리팩토링을 식별하고 특성을 분석하였다. 또한, 딥러닝 응용과 일반 파이썬 응용 두 그룹에서 단일 및 복합 리팩토링 연산의 발생 빈도에 있어 통계학적 유의미한 차이가 있음을 확인하였다. 또한, 커밋 메시지의 키워드를 분석하여 소프트웨어 개발자들의 리팩토링 의도가 커밋 메시지에 반영되었는지를 분석하였다.

• 방사성폐기물학회지
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• 제21권2호
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• pp.271-281
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• 2023

A study was conducted on the vitrification of the rare earth oxide waste generated from the PyroGreen process. The target rare earth waste consisted of eight elements: Nd, Ce, La, Pr, Sm, Y, Gd, and Eu. The waste loading of the rare earth waste in the developed borosilicate glass system was 20wt%. The fabricated glass, processed at 1,200℃, exhibited uniform and homogeneous surface without any crystallization and precipitation. The viscosity and electrical conductivity of the melted glass at 1,200℃ were 7.2 poise and 1.1 S·cm^-1, respectively, that were suitable for the operation of the vitrification facility. The calculated leaching index of Cs, Co, and Sr were 10.4, 10.6, and 9.8, respectively. The evaluated Product Consistency Test (PCT) normalized release of the glass indicated that the glass satisfied the requirements for the disposal acceptance criteria. Furthermore, the pristine, 90 days water immersed, 30 thermal cycled, and 10 MGy gamma ray irradiated glasses exhibited good compressive strength. The results indicated that the fabricated glass containing rare earth waste from the PyroGreen process was acceptable for the disposal in the repository, in terms of chemical durability and mechanical strength.

• 방사성폐기물학회지
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• 제21권2호
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• pp.283-294
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• 2023

APro, developed in KAERI for the process-based total system performance assessment (TSPA) of deep geological disposal systems, performs finite element method (FEM)-based multiphysics analysis. In the FEM-based analysis, the mesh element quality influences the numerical solution accuracy, memory requirement, and computation time. Therefore, an appropriate mesh structure should be constructed before the mesh stability analysis to achieve an accurate and efficient process-based TSPA. A generic reference case of DECOVALEX-2023 Task F, which has been proposed for simulating stationary groundwater flow and time-dependent conservative transport of two tracers, was used in this study for mesh stability analysis. The relative differences in tracer concentration varying mesh structures were determined by comparing with the results for the finest mesh structure. For calculation efficiency, the memory requirements and computation time were compared. Based on the mesh stability analysis, an approach based on adaptive mesh refinement was developed to resolve the error in the early stage of the simulation time-period. It was observed that the relative difference in the tracer concentration significantly decreased with high calculation efficiency.