• Journal of Information Processing Systems
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• 제9권4호
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• pp.602-620
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• 2013

Many previous research studies on extractive text summarization consider a subset of words in a document as keywords and use a sentence ranking function that ranks sentences based on their similarities with the list of extracted keywords. But the use of key concepts in automatic text summarization task has received less attention in literature on summarization. The proposed work uses key concepts identified from a document for creating a summary of the document. We view single-word or multi-word keyphrases of a document as the important concepts that a document elaborates on. Our work is based on the hypothesis that an extract is an elaboration of the important concepts to some permissible extent and it is controlled by the given summary length restriction. In other words, our method of text summarization chooses a subset of sentences from a document that maximizes the important concepts in the final summary. To allow diverse information in the summary, for each important concept, we select one sentence that is the best possible elaboration of the concept. Accordingly, the most important concept will contribute first to the summary, then to the second best concept, and so on. To prove the effectiveness of our proposed summarization method, we have compared it to some state-of-the art summarization systems and the results show that the proposed method outperforms the existing systems to which it is compared.

• 한국과학교육학회지
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• 제37권1호
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• pp.215-223
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• 2017

본 연구에서는 과학과 교육과정의 핵심 개념을 국가별로 비교하여 우리나라의 핵심 개념 제시 방안을 탐색하였다. 최근 개정된 미국, 캐나다, 호주, 영국의 교과별 교육과정 문서를 살펴보면 Key ideas, Big ideas, Key concepts, Disciplinary core ideas, Fundamental concepts 등과 같은 용어를 새롭게 도입하면서 해당 개념의 의미, 역할 등을 상세히 기술하며 이를 다양한 방식으로 사용하여 과학교과의 내용을 구조화하고 있다. 본 연구에서는 분석 대상국의 핵심 개념을 다루는 용어의 의미와 위상, 역할을 용례를 통해 분석하여 이를 통해 우리나라의 핵심 개념 제시 방안을 검토해보았다. 비교 대상국의 과학과 핵심 개념의 의미를 비교해본 결과 4개국 모두 교과의 내용을 다루는 개념뿐 아니라 간학문적 통합 개념을 설정하여 사용하고 있었고, 분석 대상 국가 모두에서 해당 개념들이 상당한 위상을 가지고 교육과정 문서에 사용되는 것을 확인할 수 있었다. 분석 대상 국가인 미국, 캐나다, 호주, 영국에서 핵심개념은 그 내용과 의미가 유사한 경우에도 국가에 따라 역할로서 중시하는 면에는 차이가 있었으며, 과학과 교육과정을 구조화하는 방식은 다양하지만 이 구조화에서 핵심개념이 중요한 역할을 수행하는 공통점을 가지고 있었다. 핵심개념은 학문 및 학년을 연결하는 역할을 할 수도 있으며, 과학 지식 획득의 틀(framework)로 작용하기도 한다. 또한, 핵심 개념이 미국처럼 성취 기준을 제시하는 방식으로 구조화될 수도 있으며, 캐나다 온타리오의 경우와 같이 단원마다의 목표로 구조화될 수도 있다. 이를 통해 볼 때 우리 나라 또한 우리 과학교육의 맥락에 맞는 간학문적 통합 개념을 핵심 개념으로 지정하여 과학 교육과정에서 제시할 필요가 있을 것으로 생각된다. 또한, 핵심개념은 단순히 과학 교과의 지식 내용뿐 아니라 기능, 가치 등의 요소를 포함할 수 있으며, 표현 방식 또한 단어, 문장, 도식 등 다양한 방식으로 제시될 수 있을 것이다. 이를 위해 우리 교육 목표에 맞는 핵심 개념의 내용을 선정하고 적절한 방식으로 핵심 개념을 제시하는 방안을 채택하기 위한 논의가 필요하다.

• 한국과학교육학회지
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• 제15권2호
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• pp.213-222
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• 1995

Analyzing textbook is the first step for enhancing the level of biology education especially in Korea. Prior studies of textbook analysis have mostly dealt with such topics as terminology analysis, content analysis, relationship analysis of chapters, and comparative studies. However, not much attention was paid to concept system to be learned and to relevance of concepts chosen. Therefore, the purpose of this study is to clarify the concept system and to elucidate the relationship among concepts for effective learning. Novak's concept map was utilized as a theoretical framework for the analysis of chapter I of high school biology textbook. Concept map has several distinctive merits in many aspects such as teaching, learning, and evaluation. It not only makes the understanding of key concepts and proposition a lot easier, but also helps to link prior knowledge and new concepts more effectively. This study will be a basic material for improving textbook for effective biology learning. The conclusions of the study are as follows: 1. Concepts in subchapters were arranged unsystematically or they were overlapping. For more effective understanding, those items should be rearranged. 2. Key concepts are not arrayed properly according to their hierarchy. Therefore, it was hard for students to set up concept structure. 3. The concepts emphasized by bold letters were not selected properly in accordance with their importance. Appropriate concepts should be chosen. 4. Key concepts should be explained by using examples in everyday life for easy understanding. 5. Many concepts in molecular biology is too abstract to grasp their meaning. Therefore, many audio-visual materials should be used to aid concept building.

• Journal of information and communication convergence engineering
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• 제20권4호
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• pp.242-249
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• 2022

Classical cryptography with complex computations has recently been utilized in the latest computing systems to create secret keys. However, systems can be breached by fast-measuring methods of the secret key; this approach does not offer adequate protection when depending on the computational complexity alone. The laws of physics for communication purposes are used in quantum computing, enabling new computing concepts to be introduced, particularly in cryptography and key distribution. This paper proposes a quantum computing lattice (CQL) mechanism that applies the BB84 protocol to generate a quantum key. The generated key and a one-time pad encryption method are used to encrypt the message. Then Babai's algorithm is applied to the ciphertext to find the closet vector problem within the lattice. As a result, quantum computing concepts are used with classical encryption methods to find the closet vector problem in a lattice, providing strength encryption to generate the key. The proposed approach is demonstrated a high calculation speed when using quantum computing.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2021년도 춘계학술대회
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• pp.114-115
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• 2021

본 논문에서는 지금까지의 양자 키 분배 기술에 대한 기본적인 개념과 기술적으로 발전해야 할 문제들을 소개하려 한다. 양자 키 분배 기술은 더이상 쪼갤 수 없는 물리량의 최소 단위인 양자(Quantum)의 특성을 이용해 도청 불가능한 암호키를 생성, 송신자와 수신자 양쪽에 나눠주는 기술이다. 이 기술의 대표적인 프로토콜인 BB84 프로토콜을 소개하고 현실적인 어려움과 앞으로의 과제를 살펴보고자 한다.

• Perspectives in Nursing Science
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• 제7권1호
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• pp.1-9
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• 2010

Purpose: The purpose of this study was to review behavior change theories in terms of important variables, concept definitions, and applicability to diabetes self-management behavior. Methods: Six behavior change theories (the Transtheoretical Model, the Health Belief Model, the Theory of Reasoned Action, the Theory of Planned Behavior, Social cognitive theory, and Information-Motivation-Behavioral skills Model) were reviewed which were applied in diabetes self-management interventions. Results: The five key concepts from the five non-stage behavior change theories were delineated. Based on the key concepts, a theoretical framework was formulated as the explanatory model of diabetes self-management behaviors. The four major concepts in Information-Motivation- Behavioral skills Model were included. The cognitive arm of the proposed theoretical framework included constructs related to diabetes knowledge, motivation (beliefs, attitude, social norm), self-efficacy, and intention. Conclusion: The theoretical framework described here includes the key factors of successful diabetes self- management intervention. However, the concept of motivation needs further exploration and clarification for operationalization.

• 한국지구과학회지
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• 제44권1호
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• pp.47-61
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• 2023

본 연구는 2015 개정 교육과정에 처음 도입된 핵심 개념이 추상적인 담론으로 그치지 않고 학교 현장에서 구체적인 교수학습 방안으로 구현되도록 하기 위함이다. 이에 플랫폼, 숙의, 설계의 순환적 과정에 따라 백워드 설계 모형을 활용하여 핵심 개념 이해를 위한 교수학습 자료 개발 연구에 참여한 8명의 중등 과학 교사들을 대상으로 핵심 개념에 대한 인식 및 관점을 살펴보았다. 연구 결과, 핵심 개념에 대해 궁극적 원리에 해당하는 빅 아이디어, 일상생활을 살아가는 데 필요한 최소한의 과학 개념, 기본적이고 주요한 핵심적 과학 개념 등 핵심 개념의 의미에 대해 동일 교과인 과학과 안에서도 공유되지 않은 인식의 차이가 나타났다. 이는 교수학습 지향점에도 영향을 주어, 핵심 개념을 전이와 확장 가능한 빅 아이디어로서 이해하고 있는 경우는 개념 간의 관계에 주목하며 분명한 방향성을 갖고 프로젝트 학습을 설계하는 경향이 나타났다. 한편, 핵심 개념을 삶의 맥락에서 떠올릴 수 있는 과학 소양 수준의 최소한의 과학 개념으로 인식하는 경우, 학생들의 삶에 의미 있는 학습 경험을 제공하는 것을 지향하며 일상에 적용 가능한 사례 중심으로 검색 및 조사 활동을 강조하는 경향이 나타났다. 또한 핵심 개념을 기본 개념이나 주요 개념 등 핵심적인 과학내용 요소로 인식하는 경우, 오개념 교정을 통한 개념 변화를 강조하며 정확한 과학 지식을 학습하고 지필 평가 및 수행 평가를 통한 문제 해결 문항을 개발하는 것을 중요하게 인식하였다. 2015 개정 교육과정이 마무리 되고 2022 개정교육과정이 확정·고시될 예정인 현 상황에서, 핵심 개념을 핵심 아이디어로 명명하여 빅 아이디어의 취지를 재차 강조하는 2022 개정 교육과정이 학교 현장에 안정적으로 정착될 수 있도록 실효성 있는 정책적 지원이 뒷받침 되어야 할것이다.

• 대한간호학회지
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• 제24권1호
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• pp.58-69
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• 1994

In order to see the development of Nursing related research activities in Korea over the last three decades, abstracts of almost all of the Master and Ph.D theses that appeared from 1961 up to August 1991 were collected. The number of theses was 2354, from which an index of key words has been constructed. Key words were defined as those terms in each thesis title that convey major objectives of the given thesis study and the important nursing concepts dealt with in the thesis. Although all the key words were picked from the thesis title only, full use was made of the abstracts in deciding the principal objectives and essential contents of the thesis studies and their important concepts as well. In total, 539 kinds of key words were identified from the 2354 titles, and the identified words were all found to be in the International Nursing Index. On an average each title has two key words. Which key words were most frequently used, how they have changed with time, what kind of concept is preferably dealt with by each graduate school, and the concepts to which a given key word is likely to be connected were examined. The results are summerized below : 1) For each decade the theses numbers were as follows : 54(2.3%) from the 60’s, 413(17.5%) from the 70’s, 1523(64.7%) from the 80’s, and 364(15.5%) from the 90’s. Master’s thesis contributed 96% (2252) of the papers and Ph. D’s theses filled the remaining 4%(102). 2) A total of 539 key words were used, averaging about 2 for each thesis. The most frequently used key words were ‘Nurse’, ‘Anxiety’, ‘Knowledge / Attitude /Practice’, ‘Stress /Stressor’, ‘Attitude’, ‘Job-Satisfaction’, ‘Mental Disorder’, ‘Operation’, ‘Elderly’, ‘Nursing Role’. 3) Each decades key words can be classified as : the 60’s : ‘Nursing Education’, ‘Pulmonary Tuberculosis’, ‘Mother-Child Health’, ‘Growth & Development’, ‘Public Facilities’, ‘Mental Disorder’ : the 70’s : ‘Nurse’, ‘Family Planning’, ‘Attitude’ / ‘Knowledge, Attitude / Practice’, ‘Curriculum in Nursing Education’, ‘Clinical Practice in Nursing’, ‘Analysis of the Work of the Nurse’, ‘Health Education of School’, : the 80’s : ‘Nurse’, ‘Anxiety’, ‘Stress /Stressor’, ‘Operation’, ‘Nursing Role’, ‘Job Satisfaction’ : the 90’s : ‘Nurse’, ‘Elderly’, ‘Family-Support’, ‘Stress /Stressor’, ‘Home Care’. Key word ‘Nurse’ appears continuously and most frequently through the years, which indicates that there has been active study of the characteristics of nurses and related fields. The concept ‘Anxiety’ has been studied steadly from the 80’s and it shows that interest in health and disease are increasing Which comes as a result of society changing to an industrial and informational community. 4) Looking into each graduate school’s study area key words ‘Anxiety’, ‘Nurse’, ‘Mental Disorder’, ‘Stress /Stressor’, ‘Operation’, ‘Attitude’, ‘Hemo-dialysis’, were studied in the regular graduate school : ‘Family Planning /Contraception’, ‘Knowledge / Attitude /Practice’, ‘Physical Health-State /Physical Health Examination’, ‘Nurse’, ‘Using Clinical Facilities’, ‘Health Education of School’, were studied in the Graduate School of Public Health’ ; ‘Nurse’, ‘Anxiety’, ‘Stress / Stressor’, ‘Job-Satisfaction’, ‘Clinical Practice Education’, ‘Nursing Education’, were studied in the Graduate School of Education : ‘Nurse’, ‘Job Satisfaction’, ‘Nursing Role’, ‘Administration - Employment /Employment Management’, ‘Leadership’, ‘Personnel Profile’, ‘Nursing Manpower / Changing Working Place’, were studied in the Graduate School of Public Administration. 5) The Connection between key words were : ‘Nurse Job Satisfaction’, ‘Stress / Stressor ⇔ Coping / Ajustment’, ‘Nurse ⇔ Nursing Role’, ‘Anxiety ⇔ Giving Information’, ‘Nurse ⇔ Stress / Stressor’, ‘Anxiety ⇔ Operation’, ‘Nurse ⇔ Burnout’, ‘Knowledge, Attitude, Practice ⇔ Family Planning’, ‘Nurse Administration ⇔ Employment’, ‘Anxiety Muscle ⇔ Relaxation Technic’, ‘Anxiety ⇔ Mental Disorder’. From the above it can be noted that many nursing concepts were handled in the thesis titles. But there were more than enough papers on the characteristics of the nurse. It is suggested that in depth research be made on ‘Nursing Accidents’, t-‘Ethics’, ‘Nurse - Patient Interactions’, ‘Spritual Care’, ‘Dying’, ‘Hospice’, ‘Resident Helper’ and that there should be in depth research relating to the physical and mental development of youth and in particular physical concepts like ‘Drug - Abuse’, ‘Child -Abuse and Teaching’.

• 한국과학교육학회지
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• 제17권1호
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• pp.21-29
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• 1997

Many middle school students have difficulty in understanding biological concepts because too many concepts are presented in the textbook compared to limited school hours. So, it is necessary to select concepts which are indispensable. The purpose of this study is to select key concepts in the unit 'The Continuity of Life' by surveying students' and teachers' cognition on the concepts. In this study, 78 concepts were extracted from 'Science 3', unit II 'The Continuity of Life'. To survey how students and teachers think the concepts, Likert type questionnaires were made. 300 third grade middle school students and 34 biology teachers were selected by random sampling and the questionnaires were applied. The following results were obtained:1. Students thought 59 concepts out of 78 were important and the mean score of important level of the concepts was 3.60. Students thought 26 concepts out of 78 were difficult and the mean score of diffculty level'of the concepts was 3.26. The more they think the concepts important, the more they think them difficult (r=0.7462, p<0.001). 2. Teachers thought 55 concepts out of 78 were important and the mean score of important level of the concepts was 3.82. Teachers thought 33 concepts out of 78 were difficult and the mean score of diffculty level of the concepts was 3.31. The more they think the concepts important, the more they think them difficult (r=0.6138, p<0.001). 3. The selected concepts were considered more important by teachers than by students(t=2.0150, p<0.05). However, there was no significant difference in evaluating the difficulty level of the concepts(t=0.7327, p>0.05). 4. It was found that students have difficulty in understanding concepts when they are presented in the textbook to require formal preparation than concrete preperation(t=2.6612, p<0.05).

• 한국수학교육학회지시리즈A:수학교육
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• 제45권2호
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• pp.217-230
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• 2006

The purpose of this study is to inquire the building process of Pedagogical Content Knowledge of prospective mathematics teachers about the function concepts. For this purpose, We performed the following steps; First, we performed the survey relaying to the prospective mathematics teachers' teaching experiences, capabilities of their error evaluation of the students, and viewpoints about the function concepts. Second, we performed the survey on the subject-matter knowledge about the function concepts and the key items of designing teaching plans about the function concepts. And then, we interviewed the participants to check the results of the surveys and to supplement the necessary contents. The collected data was relatively correlative and analyzed in the process. As a result, we found the followings; First, subject-matter knowledge of prospective mathematics teachers about the function concepts is different depending on the grades. Second, prospective mathematics teachers are building more extended function concepts through the major subjects. Third, the major subjects are important to build the Pedagogical Content Knowledge of function concepts. Fourth, teaching experience plays an important role in transforming subject-matter knowledge of function concepts to Pedagogical Content Knowledge of it. Fifth, building the Pedagogical Content Knowledge means transferring the teacher's viewpoint from himself/herself to the learner.