• The KIPS Transactions:PartB
• /
• v.8B no.4
• /
• pp.373-380
• /
• 2001

본 논문은 한국어 보조동사의 의미를 Sowa에 의해 제안되고 국제표준이 되고있는 개념그래프를 이용하여 형식적으로 기술하는 방법을 제안한다. 이를 위해 영어의 양상과 상에 관한 개념그래프를 알아보고 한국어 보조동사를 통사/의미론적으로 고찰한다. 한국어 보조동사의 개념그래프적 기술을 위해, 각종 논문과 국어사전에서 한국어 보조동사 40개의 여러 예문들을 수집하여 완료, 진행, 봉사, 시도, 강세, 원망, 지속, 추정의 8가지 의미로 분류하고 이들을 개념그래프로 기술한다. 실험에서는 이들 8가지 의미들을 인공지능언어의 일종인 LIPS과 유사한 KIF로 작성하고 C++를 이용하여 한국어 보조동사가 포함된 문장을 입력받아 개념그래프로 변환하는 프로그램을 구현한다. 문장 내의 모든 범주들의 개념과 개념 관계가 자연어의 모든 의미관계를 표시할 수 있는 개념그래프는 한국어 보조동사의 다양한 의미를 기술하는데 적합함을 알 수 있었다.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2002.11a
• /
• pp.573-576
• /
• 2002

본 논문에서는 언어학의 관점에서 시제와 상의 특성을 알아 보고, Reichenbach 의 시제와 상을 살펴 보며, 상의 기술에 있어서 언어학자의 여러 주장과 문제점을 고찰하며, 한국어의 시제를 영어의 12 시제와 비교한다. 그리고 한국어의 여러 시제 의미를 분석하고, 시제의 구조를 개념그래프 이론에 의거하여 기술한다. 실험에서는 시제가 포함된 문장을 입력 받아 개념그래프로 변환하는 프로그램을 구현하고 그 결과를 기술한다.

• Journal of the Korean earth science society
• /
• v.40 no.5
• /
• pp.538-547
• /
• 2019

This study analyzes the conceptual understanding of in-service and pre-service earth science teachers about the H-R diagrams and evolution of stars using conceptual status analysis categories. The results show that (a) many teachers use unscientific language in the Intelligibility range, (b) teachers are categorized in Low scientific inquiry ability related to graph creation and unscientific analogy for scientific concept which is hightly corelated to the possibility of misunderstanding in the teaching process, and (c) pre-service teachers lack the understanding of the secondary science curriculum. It is necessary to develop pre-service curriculum that can be applied to the school site. In the category of Plausibility range, (d) both groups understood the cosmological meaning of stellar evolution. However, pre-service teachers do not specifically explain the mechanism of a star. In the category of Fruitfulness range, in-service teachers come up with educational problems reflecting the academic characteristics of earth science and apply their knowledge to actual problem solving. On the other hand, pre-service teachers show high nonresponse ratio, they do not see the H-R diagram and the evolution of stars as a practical concept. In the analysis process, both groups are found to have many unscientific conceptions about the H-R diagram and evolution of stars. Therefore, it is suggested that caution be used in developing a professional development program of earth science teachers.

• Proceedings of the KSME Conference
• /
• 2007.05b
• /
• pp.3068-3073
• /
• 2007

Aerodynamic forces and moments have been used to control rocket propelled vehicles. If control is required at very low speed, Those systems only provide a limited capability because aerodynamic control force is proportional to the air density and low dynamic pressure. But thrust vector control(TVC) can overcome the disadvantages. TVC is the method which generates the side force and roll moment by controlling exhausted gas directly in a rocket nozzle. TVC is classified by mechanical and fluid dynamic methods. Mechanical methods can change the flow direction by several objects installed in a rocket nozzle exhaust such as tapered ramp tabs and jet vane. Fluid dynamic methods control the flight direction with the injection of secondary gaseous flows into the rocket nozzle. The tapered ramp tabs of mechanical methods are used in this paper. They installed at the rear in the rocket nozzle could be freely moved along axial and radial direction on the mounting ring to provide the mass flow rate which is injected from the rocket nozzle. In this paper, the conceptual design and the performance study on the tapered ramp tabs of the thurst vector control has been carried out using the supersonic cold flow system and shadow graph. Numerical simulation was also performed to study flow characteristics and interactions between ramp tabs. This paper provides to analyze the location of normal shock wave and distribution of surface pressure on the region enclosed by the tapered ramp tabs.

• Journal of Korean Society of Archives and Records Management
• /
• v.19 no.1
• /
• pp.23-67
• /
• 2019

Records in Contexts (RiC) is an international archival description standard developed by integrating and normalizing four archival description standards of the International Council of Archives (ICA). RiC has the advantage of diversifying archival description, exposing the context of records, and ensuring data interoperability between disparate systems. In this study, RiC is set up as a key tool in the design of archive systems, and logical data modeling is performed to implement the database. Because of RiC's conceptual model, RiC-CM can be used as a data reference model, and which makes it possible to develop a data model that meets user requirements. Therefore, this study intends to implement these two data models: relational data model, which is widely used as the database on legacy systems, and graphical data model, which can flexibly extend objects around the relationship between information entities.

• Journal of Korean Elementary Science Education
• /
• v.34 no.1
• /
• pp.72-85
• /
• 2015

Conception in learner's cognitive structure has a niche as species in ecosystems. The purpose of this study is to analyze the change of niche overlap of photosynthesis concept through instruction. The photosynthesis concepts were selected from literature review. Selected concepts were in 4 areas: Location of photosynthesis, reactants, products, and environmental factors. The subjects consisted 304 elementary students. The respondent marked the relevance between the presented concepts and each area on a scale of 1~30 points. The analysis of niche overlap in concepts was performed by changing in niche overlap graph, niche space size, and overlap index before and after instruction. The results are as follows. First, on the whole understanding level and relevance of the scientific concepts was increased through instruction as a result of learning. Second, elementary school students cognitive concepts in the form of chunking concepts through classification process. Based on the results, this study has the following suggestion. Students' conceptual ecologies and niche analyzed by this study will be used as material for development of instruction strategy.

• Proceedings of the Korean Operations and Management Science Society Conference
• /
• 2007.11a
• /
• pp.58-63
• /
• 2007

Recently, as the management environments are changing rapidly and the uncertainty is becoming larger, the needs of internal control for management and IS become stronger. In order to construct a new internal control system for IS, it is necessary to evaluate the former research of the system. This study emphasizes the importance of effective internal control system, presents a conceptual framework for the preceding factors to consider, and verifies empirically the framework. This study sets the organization citizenship behavior, IS innovation resistance, and IT capability from the viewpoint of Socio-Technical system as the preceding factors for the effectiveness of internal control system. A research model, affecting the above factors on IS capability as a mediating variable of the internal control effectiveness for the use of IS, is set up. PLS-Graph 3.0 is used to verify the model. We found that the internal control effectiveness have affirmative effect on information capability, a surrogate variable of the IS effectiveness and a mediation effect is meaningful.

• Proceedings of the Korea Contents Association Conference
• /
• 2004.11a
• /
• pp.265-268
• /
• 2004

Keyword matching technique which is used in most information retrieval systems is unfit for efficient processing of geometrically increasing information. The problem can be solved by using semantic information and an efficient method of semantic processing is introduced in this paper. The technique uses conceptual graph to represent the semantic information and apply it for information retrieval. The implemented system can perform exact matching and partial matching. Partial matching has two different types. One is syntactic partial matching and the other is semantic partial matching. The semantic semilaries are measured by the subclass relations in the ontology. The introduced technique can be used not only information retrieval but also in various applications such as an implementation of dynamic hyperlinks.

• Proceedings of the Korean Information Science Society Conference
• /
• 2005.07b
• /
• pp.361-363
• /
• 2005

본 연구에서는 온라인 다중 사용자 환경의 eBook 어노테이션 시스템 개발에서 데이터를 의미 기반으로 관리하고, 데이터에 대하여 상호 공통적인 이해를 표현하며, 그리고 데이터에 대한 무결성 검사 등을 지원하기 위해서 eBook 어노테이션 온톨로지를 구축하였다. eBook 어노테이션 테이터에 대한 상호 공통적인 이해의 표현을 위해서 한국 전자책 문서 표준인 EBKS(Electronic Book of Korea Standard)를 기반으로 구축 하였으며 구축된 온톨로지는 Conceptual Graph(CG)를 사용하여 표현하였다. 의미 기반의 처리를 위해서 본 온톨로지에서는 다국어(Multilingua) 관계를 고려하였으며 또한 오노테이션 데이터 생성 시 중요도를 표현하기 위해서 중요성 axiom을 고려했고, $NF^2$(Non-First Normal Form)에 입각하여 온톨로지를 설계함으로서 어노테이션 데이터의 검색에 활용도를 높였다. 제안된 온톨로지는 어노테이션 데이터의 재사용성을 높일 수 있고 의미 정보를 활용함으로써 eLearning, cyberclass과 같은 다중 사용자 환경에서 효과적인 협업을 가능하게 한다. 본 연구에서는 구현한 eBook annotation 시스템은 구축한 온톨로지를 사용함으로써 의미 기반의 데이터 관리가 가능하다. 또한 어노테이션 생성 시 온톨로지 구조를 모르더라도 어노테이션을 생성할 수 있는 인터페이스를 구현하였다.

• Educational Technology International
• /
• v.13 no.1
• /
• pp.145-173
• /
• 2012

The purpose of this study is to develop collaboration scripts as an instructional means to facilitate argumentation in computer-supported collaborative learning, and to analyze their effects. To develop collaboration scripts for argumentation, researchers used activity theory as a conceptual framework and refined the design principles by design-based research. Using LAMS, collaboration scripts for argumentation were developed based on the ArgueGraph. To examine their effects, 72 participants were divided into two groups by internal scripts and randomly allocated to one of three external scripts. Applying mixed methods, researchers analyzed argumentation competence related to the cognitive aspect, examined self-efficacy related to the motivational aspect, and identified the factors influencing collaborative learning processes and outcomes. Researchers found that the internal script is a critical factor to determine the dimensions, degrees, and duration of improvement in argumentation competence. That is, learners with higher internal scripts improved highly in the quality of single arguments, while learners with lower internal scripts improved continuously in the quality of argumentation sequences. The effects of the external scripts varied with the internal script levels and supporting periods. Besides, collaboration scripts for argumentation had positive effects on learners' self-efficacy, and learners with higher internal scripts had better self-efficacy. The factors influencing collaborative learning processes and outcomes showed different results depending on the learning context. Therefore, when scripting learner's interaction in CSCL, researchers should design the scripts adaptable to a natural context of activities.