• Journal of the military operations research society of Korea
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• v.16 no.1
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• pp.56-66
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• 1990

Expert systems are in an early evolutionary phase, but it already has significant impacts on business operations. More and more organizations are becoming interested in applying expert systems as solutions to their business problems. This paper describes how systems started, what is their current situation, and what are their application areas. It outlines what is expert system and how to develop an expert system. And it analyzes expert system shells and shows some current available expert system shells. Lastly, it concludes and predicts the main attributes of the future expert systems.

• Journal of information and communication convergence engineering
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• v.16 no.1
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• pp.48-51
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• 2018

The traditional documents analysis was centered on words based system was implemented using a morpheme analyzer. These traditional systems can classify used words in the document but, cannot help to user's document understanding or analysis. In this problem solved, System needs extract for most valuable paragraphs what can help to user understanding documents. In this paper, we propose system extracts paragraphs of normalized XML document. User insert to system what filename when wants for analyze XML document. Then, system is search for keyword of the document. And system shows results searched keyword. When user choice and inserts keyword for user wants then, extracting for paragraph including keyword. After extracting paragraph, system operating maintenance paragraph sequence and check duplication. If exist duplication then, system deletes paragraph of duplication. And system informs result to user what counting each keyword frequency and weight to user, sorted paragraphs.

• Journal of the Korean Society of Safety
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• v.7 no.4
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• pp.95-99
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• 1992

The attraction of using expert system in operator support systems for modern plant is that it offers a way of dealing with the problem of information overload that can occur during a severe disturbance at a modern industrial plant. During such a disturance the volume of information presented to operators may be such that they are unable to decide quickly what is important and what is not. Therefore, arriving at a correct diagnosis of the initialling fault may be delayed. An expert system operator sup-port system is a means of focusing attention on what really matters and cutting out the rest. This paper presents the development of prototype expert system which detect the fault part, machine, system and decide action priority. This prototype expert system has 6 sub- system which is Interface Manager, Decision Maker, Inference Engine, Knowledge base, Simulatio, and D.P System ( Diagnosis and predictor)

• Journal of Power System Engineering
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• v.18 no.4
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• pp.11-16
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• 2014

Although smoke emitted from ships is not included in IMO(International Maritime Organiztion) regulation yet, it is one of the substance what is polluting mainly the air. Especially, its concentration is very high when an engine is started and a load is rapidly changed. This is caused by unburned fuel what is injected more than necessary quantity after combustion period. It is possible to decrease smoke concentration emitted at starting engine by controlling fuel injection quantity, but it is concerned that time to rated speed must be spent. Then a governor what can reduce the smoke concentration without a loss of time to rated speed is needed. We adopted a electro-hydraulic governor what can control dual fuel start limit function and achieved very low level of smoke concentration without greater the loss of time to rated speed.

• Journal of the Korean earth science society
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• v.32 no.5
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• pp.494-503
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• 2011

During the last three decades, earth science has been re-conceptualized as an interdisciplinary discipline entitled Earth System Science (ESS), which is based on knowledge of the physical earth system and human impact on the earth. While there is increasing effort to teach earth as a system in K-12 education, teachers' preparedness of to teach earth system is still in its infancy. This article focuses on reviewing the literature of teachers' knowledge of earth systems and of how teachers' knowledge of subject matter affects their teaching practice and pedagogical content knowledge (PCK). First, the study investigated a literature of PCK in general as well as in science teaching. Then this study duscuss what teachers' subject matter knowledge (SMK) is and what it means to be in teaching earth system science. Third, a literature of teachers' knowledge of earth system was reviewed. Finally, a number of suggestions and implications are made as to what teacher education program should do to better prepare future teachers to teach earth systems.

• THE INTERNATIONAL COMMERCE & LAW REVIEW
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• v.44
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• pp.31-55
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• 2009

This study attempts to provide a comparative overview of the liability systems Korean law and the PELS adopt, that is, the approaches taken by Korean law and the PELS to deal with various irregularities of contractual performance. In addition, it examines in a comparative way the questions of what is the position of the seller's liability for his delivery of defective goods under the chosen liability system and what is the legal nature of the seller's liability. The study finds that the dual liability system taken by Korean law has caused some complexities as to the matter of which liability is applicable in some borderline cases. The problem in such complexities is originated in that the remedies available and the limitation period applicable are differentiated in accordance with one's different categorization among three types of default under the general liability and defective performance under the seller's guarantee liability. In this light, the study argues that the unified liability system under the PELS is superior because its concept of non-performance embraces in a unitary manner all the aspects of default including defects in quality, quantity and title. In addition, it finds that Korean law has suffered endless debates on the question of what are the true contents of the same remedies of rescission and damages provided under the seller's guarantee liability as under the general liability. The debates have been come along on the basis of the traditional presumption among some of civil law jurisdictions that two liabilities be different in terms of not only their legal nature but also their contents of remedies. The study argues that the problem may be circumvented, first, by another way of thinking that the unified liability in Korean law is inferred from the specification of the identical remedies for both the general liability and the seller's guarantee liability under the KCC, second, by the preposition that the requirement of fault be depended upon what remedy the buyer seeks to claim rather than what liability he does to rely on.

• School Mathematics
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• v.2 no.2
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• pp.509-543
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• 2000

The purpose of this paper is to study the present situation of the performance assessment having been introduced for recent years as a new system to measure students' mathematical power as well as their achievement in mathematics by analyzing math teachers' recognition about the assessment. The specific research questions are as follows: (1) what is the difficulty in the administrative process of the assessment\ulcorner (2) what is mathematics teachers' recognition about the assessment with respect to its nature and purpose\ulcorner (3) what is the situation of the in-service program for the newly introduced assessment\ulcorner (4) what is the administrative procedure of the assessement\ulcorner (5) what is mathematics teachers' recognition about the effectiveness of the assessemtn\ulcorner (6) What support is requried to improve the assessemt?

• The KIPS Transactions:PartD
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• v.17D no.2
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• pp.87-102
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• 2010

A vast amount of traffic data is produced every day from detection devices but this data includes a considerable amount of errors and missing values. Moreover, this information is periodically deleted before it could be used as important analysis information. Therefore, this paper discusses the implementation of an integrated traffic history database system that continuously stores the traffic data as a multidimensional model and increases the validity and completeness of the data via a flow of processing steps, and provides a what-if analysis function. The implemented system provides various techniques to correct errors and missing data patterns, and a what-if analysis function that enables the analysis of results under various conditions by allowing the flexible definition of various process related environment variables and combinations of the processing flows. Such what-if analysis functions dramatically increase the usability of traffic data but are not provided by other traffic data systems. Experimantal results for cleaning the traffic history data showed that it provides superior performance in terms of validity and completeness.

• Proceedings of the KIEE Conference
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• 1983.07a
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• pp.174-176
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• 1983

This paper explains about general considerations and project management for a modern electric utility EMS/SCADA system. This paper also attempts to help engineers in the following situation: They are given the task of specifying, buying and installing a EMS/SCADA system. When do they start? What tools/texts/guidelines are available to help them out? If it is a large system, methodical project management is necessary. What are the critical tasks to be undertaken? When should they been done and how does their timing impact the whole project.

• Journal of The Korean Association of Information Education
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• v.7 no.2
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• pp.153-161
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• 2003

The intent of this study was to examine what elementary school teachers thought about the adaptation to the information age in education in a bid to seek ways to have the computer equipments utilized enough to justify the efforts and the cost of installation. This study was conducted to provide answers for the following questions: First, what do the elementary school teachers perceive the Education information system? Second, what is their opinion on the ways to elevate teacher competencies for dealing with the information system? Third, what is their awareness of the information ethics?