• Current Industrial and Technological Trends in Aerospace
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• v.6 no.2
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• pp.125-132
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• 2008

High speed camera is very important and essential device to analyze the motion of fast moving object in detail. This paper describes the basic concepts of the high speed film camera and high speed digital camera and the history and future technical trends in high speed camera industry. In addition, application field of high speed camera in Korea as well as other countries and future plan to use high speed camera in Naro Space Center has been descried.

• The Journal of Korean Academic Society of Nursing Education
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• v.5 no.2
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• pp.219-231
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• 1999

Health is an important concept within the health component of nursing paradigm. And health concept is a core component to determine health behavior according to individual's health perception. Health habits during the period of university student will be affecting health behavior of the adult period. The purpose of this study was to analyze health concept of the university students in Korea and to provide the strategy of health care for the university students. The method of this research was a descriptive study using a self-report questionaire. The subjects were 301 students of university and their age was from 19 to 30. The results of this study were as follows: 1. Health concepts perceived by the university students were 'wholeness without difficulty', 'vitality', 'harmony', 'comfort', 'Good condition and fitness of physical and psychological condition', 'soundness', 'happiness', 'enabling' 'smoothness'. 2. Health was perceived by the subjects as an essential and an important component of life.

• Korea-Australia Rheology Journal
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• v.18 no.1
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• pp.31-38
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• 2006

A systematic approach is employed to elucidate the interrelationships among macroeconomic entities such as science, engineering, technology, industry and national economy. Specifically, a conceptual, sequential method has been developed to clearly identify the essential ingredients needed for each macroeconomic entity starting from science to transform to the next one, and all the way to the national economy where the production of added-value is of overriding importance. The results thus obtained can then be utilized for macroeconomists to readily apply the engineering theory and knowledge to various macroeconomics situations, while engineers can likewise utilize the results on top of the microeconomic knowledge already prevalent in many engineering fields in getting better grasp of the seemingly difficult nation's macroeconomic picture. Other peripheral concepts and issues such as the evolutionary development of industry, the perspectives of the $21^{st}$ century civilization, an analogy between macroeconomics and chemical engineering, and national policies for each macroeconomic entity are also presented in this study.

• New & Renewable Energy
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• v.4 no.4
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• pp.3-9
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• 2008

In design PV (photovoltaic) system, there are many important factors to consider for best site selection. It is essential to understand to know the amount of sunlight available and how to minimize the shadings. This study presents basic concepts for understanding sun's position and insolation. also it gives easy tools for topography analysis. Finally, this study shows some theoretical calculations of power generation losses by topographic obstacle's elevations and disadvantages in economic feasibility, that is about 7million won loss per year for case of 10 degree topography elevation with assuming average Korea's topography elevation as 5 degree.

• Journal of National Security and Military Science
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• s.7
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• pp.25-54
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• 2009

This article is focusing on the importance, concepts, and theses of Military Thoughts. This article also tried to find the research trend on the Korean Military Thoughts History. In addition, this article makes a general overview of Yang Seong-ji in the mid 15th Century. The fundamental objects of Military Thoughts are Tactics of a person for Military Affairs and Military Tactical Manuals. The circumstances at that time, the Military System, and Weapon system are based on the preceding two essential elements on Military Thoughts. From now on, this article insist on the necessity of the Study on the History of Korean Military Thoughts focused on a military figure.

• Journal of Industrial Technology
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• v.15
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• pp.51-62
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• 1995

Databases can crash due to various failures in computer systems. Recovery is a mechanism for restoring consistent data from damages caused by the by the failures and is an essential feature in database systems. This paper surveys recovery techniques for memory resident database systems. We first describe the basic architecture for memory resident database systems, and point out the main factors affecting their performance enhancement. Next, we explain the write-ahead logging(WAL), a recovery technique widely-used in most disk resident database systems, for easy understanding of basic recovery mechanisms. And then, we discuss some new concepts employed in memory resident database systems recovery. Finally, we present a representative memory resident database recovery technique, which is based on a special purpose hardware called HALO, as a case study.

• Journal of Korean Library and Information Science Society
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• v.39 no.1
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• pp.355-375
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• 2008

Copyrights have threatened by some people even though information transfer methods are various and users can change information with others rapidly through the improvement of digital technology. The purpose of this study is to identify illegal actions against academic library users and to propose a solution to the copyright problem. Through understanding general concepts of copyrights and illegal cases against copyrights, collected essential cases were analysed. The results show that library users have copied and transferred illegally some materials with knowing unlawful actions.

• Journal of Korean Library and Information Science Society
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• v.18
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• pp.269-300
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• 1991

Reviewing the outcomes of studies on contemporary information science during some periods and identifying the research area exposed in its studies are essential processes to develop the research and theories of information science and to establish the academic identity of information science. This study seeks to provide the some useful methodological approaches for establishing the research area of information science. The methodological approaches to research area of information science are as follows : (1) normative approach by concepts, definitions, and principles of information science, (2) content analysis of text books, (3) content analysis of curricula of graduate courses, (4) content analysis of graduate disserations or treatises, (5) IIS(Institute of Information Scientists)'s criteria for information science, (6) professors' need assessment, (7) interdisciplinary approach, etc. These are the representative types of methodological approach and have an enough validity and effectiveness in their own way. Therefore I think of that those should be integrately applied to establishing the academic identity of information science.

• Journal of the Korean Operations Research and Management Science Society
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• v.27 no.4
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• pp.11-27
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• 2002

This paper is aimed at surveying the method that supports logical and theoretical back grounds of electricity service pricing, to investigate whether the ESPM can reflect comprehensively the various interests of parties and persons concerned with electricity supply and demand, and analyzing the practical applicability of the model in short-term perspectives. The major findings of this study can be summarized as fellows. First, the ESPM explains what process the equilibrium price is attained through, which is the essential concept and object in evaluating the value of public enterprises or utilities and the price of electricity Second, the ESPM provides the logics and methods that can objectify the discrete price by each electricity user. Third, the ESPM presents theoretical logics and practical methods that can calculate the basic price and the variable price per electricity unit which are key concepts in the two-part tariff. Fourth, the ESPM has powerful practical applicabilities in the reasonable electricity pricing and in the explanation for the balance between parties and persons interested with electricity supply and demand.

• Journal of Engineering Education Research
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• v.15 no.6
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• pp.34-42
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• 2012

Problem solving by homework assignment is a process of practicing what were discussed in classrooms and thus is considered as an essential part of learning procedure in engineering education. We introduced the concept of cooperative learning, Student Teams-Achievement Division(STAD), to improve the students' learning efficiency by in-class problem solving. The instructor explained fundamental concepts, and lecture materials were handed out to compensate for the time of in-class team activity. Brief tests were given after every chapter, and team-based additional credits were given for the improvement comparing the average of previous tests of each student. This attempt of modified STAD was evaluated to have brought about a significant improvement in students' academic achievement, in addition to activating classroom atmosphere.