Ontology를 이용한 이종 메타데이터 검색 시스템의 설계 및 구현

최현종,김태영,Choe, Hyun-Jong,Kim, Tae-Young 한국정보교육학회 2004 정보교육학회논문지 Vol.8 No.3

World Wide Web is not more meaningless sea of information but is becoming the Semantic Web that provides many users with meaningful information. The starting point is the XML and metadata, RDF is a stopover which gives technique to relate arbitrary web resources. And now, the semantic and logic of web resources can be settled in the Ontology. A lot of educational multimedia web resources in Korea have produced their metadata with KERIS's KEM(Korea Educational Metadata). Therefore our country have to start the study of the semantic and logic in web resources. But, many researchers in Korea are more eager to study Dublin Core's DC and SCORM's LOM metadata specification than KEM. Thus the study of method about sharing and integrating these three metadata specifications should be performed before the study of semantic and logic in web resources in Korea. We design the Ontology to integrate these three metadata specifications and implement the prototype system using this Ontology. These three metadata have some elements that have same labels and meanings, and other elements have different labels and same meanings. To match these different labels which have same meanings, we adapted the one-to-one mapping technique in designing our Ontology. This designed Ontology was imported as "integrated schema" in our prototype searching system to integrate three different metadata in databases. Moreover we know that the more specific property design of class in Ontology was needed in order to provide users with more informed searching results such as synonym, antonym, hierarchy and associations.

유도전동기 가변속 드라이브의 기술개발 동향

최현종,Choe, Hyeon-Jong 한국전기산업진흥회 1992 電氣産業 Vol.3 No.2

DBMS의 웹서비스를 이용한 학습객체 메타데이터 추출 및 통합에 관한 연구

최현종,Choe, Hyun-Jong 한국정보교육학회 2003 정보교육학회논문지 Vol.7 No.2

XML is becoming a new developing tool of web technology because of its ability of data management and flexibility in data presentation. So it's well researched that the reusability and integration with learning objects such as text, image, sound, video and plug-in programs of web contents in computer education. But the research for storing, extracting and integrating metadata about learning object was needed prior to implementing online learning system to integrate and manage it. Therefore this study propose a new method of using web service of DBMS for extracting learning object's metadata in database server which located in 3-tier system. To evaluate the efficiency of proposed method, The test server and two DBMSs(MS SQL Server 2000 and Oracle 9i) which have 30 metadata was implemented and the response time of it was measured. The response time of it was short, but in order to using this method the additional programming with SAX/DOM was necessary.

TPACK 모형에 기반한 예비 교사의 테크놀로지 지식 교육 프로그램 적용과 분석

최현종(Hyun-Jong Choe),이태욱(Tae-Wuk Lee) 한국컴퓨터정보학회 2015 韓國컴퓨터情報學會論文誌 Vol.20 No.2

본 연구는 교사의 전문 지식 모형인 TPACK을 예비 교사 교육 프로그램에 적용하고, 그 결과를 분석한 것이다. 이를 위해 테크놀로지 지식을 향상시킬 수 있는 강의를 설계하여 적용하였고, 이를 수강한 예비교사 A 그룹과 기존의 ICT 활용 강의를 수강한 B 그룹을 대상으로 설문을 실시하였다. 두 집단의 설문 결과를 통계 분석한 결과, 본 연구의 강의를 수강한 예비교사에게서 TPACK의 구성 요소인 테크놀로지 지식, 테크놀로지 내용지식, 테크놀로지 교수지식, 테크놀로지 교수내용지식이 향상된 것을 확인할 수 있었다. 또한 상관관계 분석에서도 7개의 세부 지식들이 모두 유의미한 정적 상관관계를 나타내었다. 이를 통해 TPACK 모형의 테크놀로지 지식이 예비교사 교육 프로그램에 적용되어야 함을 제안하였다. This study aimed to design and apply the technological pedagogical and content knowledge(TPACK) model to pre-service education program, and to analyze its results for attending student’s questionnaire. At first, a lecture that designed to elevate one’s technological knowledge was studied and implemented. To perform this study, TPACK survey instruments were distributed to pre-service teacher group A who took the designed lecture and group B who took ordinary ICT literacy lecture. The results showed that TK, TCK, TPK, and TPACK improved significantly in group A, and significant positive corelation shows among 7 subcategories of TPACK. Based on the result of this study, we suggested that pre-service teacher education should consider the combination of pre-service education program and technology knowledge in TPACK model.

컴퓨팅 사고력 교육 프레임워크의 개발과 적용에 관한 연구

최현종(Hyun-Jong Choe),이태욱(Tae-Wuk Lee) 한국컴퓨터정보학회 2016 韓國컴퓨터情報學會論文誌 Vol.21 No.9

In this paper, we propose the computational thinking education framework which provides three steps of computational thinking process and three kind of activities about computational thinking learning in class. The key idea of this framework is to provide the guidelines of designing activity steps of teaching and learning computational thinking in class using three axles of framework such as problem area, process of learning, and steps of computational thinking process. After designing a framework, we show that sample course of programming education program containing contents of Informatics subject in middle school by implementing our framework. Proposed framework and programming education program in middle school will be the good case study and guide to implement computational thinking concerned education programs in elementary, secondary, and universities.

핵심 역량 관점의 2015 중학교 정보 교육과정 분석

최현종(Hyun-Jong Choe) 한국컴퓨터정보학회 2016 韓國컴퓨터情報學會論文誌 Vol.21 No.10

In this paper, we have looked at through core competences and contents of Informatics curriculum in middle school by expert questionnaire and Focus Group Interview(FGI). Among nine core competences of Informatics subject in curriculum, abstraction and automation were easily found, but creative harmony and cooperation were indirectly confirmed in the statements of teaching and assessment sections of Informatics curriculum in middle school. It was also identified that some core competency elements are redundant or hardly to found in the contents of Informatics curriculum. In addition, various opinions about Informatics curriculum have been put forward over the FGI. The results of this study will be the case that can be consulted on new revised Informatics curriculum to be developed further.

정상 신기능 환자에서 Sodium Phosphate 복용 후 발생한 중증 고인산혈증 및 저칼슘 강직

최현종 ( Choe Hyeon Jong ),박종필 ( Park Jong Pil ),이윤정 ( Lee Yun Jeong ),전성희 ( Jeon Seong Hui ),정금모 ( Jeong Geum Mo ),김정화 ( Kim Jeong Hwa ),이광영 ( Lee Gwang Yeong ) 대한신장학회 2003 Kidney Research and Clinical Practice Vol.22 No.6

Oral sodium phosphate (NaP) is increasingly used to prepare patients for gastrointestinal procedures such as colonoscopy. Severe hyperphosphatemia may complicate bowel-cleansing preparation using oral NaP. The risk of hyperphosphatemia is known to increase with excessive and/or repeated doses, increased intestinal absorption, or impaired renal excretion of phosphate. Hyperphosphatemia may produce acute renal failure, but the mechanism is not yet clear. Some authors suggest that renal injury is caused by intrarenal calcium-phosphate deposition, but others suggest that direct tubular toxicity or a disturbance in renal hemodynamics may induce renal injury. A 74-year-old woman was admitted with generalized weakness after taking NaP for colonoscopy. She had no underlying diseases such as renal disease. She was hypotensive and had carpopedal spasm with hypocalcemia, severe hyperphosphatemia, metabolic acidosis, and non-oliguric acute renal failure. She was treated with aggressive hydration, calcium replacement and aluminum-containing antacid, but hyperphosphatemia was aggravated (35.6 mg/dL). Hemodialysis was done and phophate concentration was lowered to 5.5 mg/dL. It is suggested that caution should be taken when using phosphatecontaining laxatives especially for elderly patients even if they have no underlying diseases. (Korean J Nephrol 2003;22(5):736-739)

순서도를 활용한 프로그래밍 제어 구조 학습에 나타난 오류 유형 분석

최현종 ( Hyunjong Choe ) 한국컴퓨터교육학회 2016 컴퓨터교육학회 논문지 Vol.19 No.1

컴퓨팅 사고 교육에서 알고리즘의 설계는 학습자의 논리적 사고력과 절차적 사고력이 요구되는 중요한 학습 과정이다. 하지만 알고리즘 학습에 관한 연구와 학습자가 실제 학습에서 겪는 오류에 관한 연구가 부족한 실정이다. 이에 본 연구는 알고리즘 설계 학습에서 순서도를 활용한 프로그래밍 제어 구조 설계에서 발견된 학습자의 오류를 분석하여, 오류 유형을 제시하였다. 대학생을 대상으로 한 강의에서 세가지 제어 구조에 관한 평가 문항을 제시한 결과, 순차 구조에서는 오류 유형이 발견되지 않았다. 하지만 조건 구조에서는 2개의 조건문이 중첩된 경우 조건 설정에서 오류가 발생하였다. 반복 구조에서는 반복의 횟수를 조절하는 조건, 반복되는 명령문의 위치, 중첩된 반복문에서 조건과 명령문의 위치 오류가 발견되었다. 본 연구에서 나타난 오류 유형은 초·중등학교와 대학에서 실시하고 있는 컴퓨팅 사고 교육의 알고리즘 설계 학습에 참고할 수 있는 사례가 될 것이다. Designing algorithms is a very important learning process in computational thinking education because it requires learner’s logical and procedural thinking. But the case studies that have topics of algorithms learning and students’ types of errors in learning algorithms are not enough. So the purpose of this study is to analyze students’ errors that discovered in the process of learning three control structures of programming using flowchart and provide types of errors in designing algorithms. Results about tests of three types of control structures in university student’s algorithms learning class showed different cases of types of errors; types of sequential control error are not presented in the class, types of conditional control error are presented in the case of setting the conditions of nested conditional control, and types of iterative control are showed in the many cases of iterative conditions, statements of single and nested iterative control structure. The results of study will be a good case study about teaching designing algorithms of computational thinking education in elementary, secondary school and university.

IoT 기반의 컴퓨팅 사고력 교육 프로그램 개발

최현종(Hyunjong Choe),임진숙(Jinsuk Lim) 서원대학교 사범대학 부설 교육연구소 2015 교육발전 Vol.35 No.1

Internet of things (IoT) is the ICT technology that recently has been on the rise in domestic and in global. The IoT is expected to be a future growth engine by grafting ICT technology to traditional industry. The most important matter for internet of things to grow as successful business is incubating professional man power. The course of Informatics subject in middle school can t hold a candle to the field. And the course of school is not systematic. Thus, it is continue a problem that human power production not be applied to the field and computational thinking ability. Thus, this study is to suggest how to design systematic education programs for internet of things and to operate those programs in efficient. In this paper, proposed an effective training courses in middle school by introducing the physical computing education course and the IoT program. The system proposed in this paper will be available in an IoT specialized manpower training and a SW education.

전문가 설문에 의한 초·중등학교의 정보윤리 학습요소 및 교수법 연구

최현종(Hyunjong Choe) 한국컴퓨터정보학회 2012 韓國컴퓨터情報學會論文誌 Vol.17 No.12

본 논문에서는 정보윤리 교육을 위한 학습요소 및 교수법을 전문가 설문 방법으로 연구하여 제안하였다. 최근 인터넷이 생활의 새로운 장이 되었지만 올바른 인터넷 활용을 위한 정보윤리 교육은 초,중등학교에서 제대로 이루어지지 못하고 있다. 정보 교육이 실제 초,중등학교에 이루어지 위해 가장 우선해야 될 것은 바로 교육을 위한 학습요소의 선정이다. 이에 본 연구는 전문가 설문을 통해 초,중등학교에서 교육해야 할 학습요소를 추출해 보았고, 이를 학교급별로 다시 분류하여 제시하였다. 그리고, 연구된 정보윤리 학습요소가 실제 학교에서 효율적으로 가르쳐지기 위해 각 학습요소에 적합한 교수법을 현장 교사를 대상으로 설문을 실시하여 제시하였다. 본 연구에서 제시한 정보윤리 학습요소와 교수법만으로 실제 학교 현장에서 정보윤리를 가르칠 수는 없다. 하지만, 정보윤리 관련 교육과정을 개정하고, 실제 정보윤리 교과서를 제작하는 데에 좋은 참고 자료가 될 것이다. The objectives of this study are to study and propose the learning elements and it's teaching methods for Information Ethics by expert survey. In recent days, Internet is the new field of our living, but teaching the students in elementary and secondary schools the subject of Information Ethics which purpose is to have positive attitude of utilizing Internet is not properly executed. The first step to teach Information Ethics in schools is to choose the learning elements in Information Ethics. Therefore, this paper is to choose the learning elements and re-arrange them with point of view to elementary and secondary schools. And more, in order to teach the students the learning elements of Information Ethics effectively, we propose the proper teaching methods to the learning elements by teacher's survey. The learning elements and teaching methods in Information Ethics is not the perfect guide to teach students in school, but the output of this study will be the good guide to revise the Information Ethics-related curriculums and product the textbooks about Information Ethics.