• Journal of Korean Society for Geospatial Information Science
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• v.6 no.2 s.12
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• pp.119-132
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• 1998

Much information on the terrain and the space has been depicted to maps of various form according to the map scale and the application. In Korea the base map system was made by only one projection method(Transvers Mercator projection). This is the reason to study this paper, because I think singular map projection method can't satisfy the various map scales and application. In this paper Meridian Are Length, Parallel Are Length of ellipsoid and the area of ellipsoidal surface-the length, the width and area of the map scale 1/5,000, 1/25,000, 1/5,000, 1/1,000, will be calculated and transformed to the plane length and area by Transvers Mercartor projection and Polyhedrical projection. The projection distortion which came into existence on this occasion was compared and analyzed by this Paper. And Properties on TM and Polyhedrical projection were understood. Lastly this paper intended to present suitable map projections according to the map scales and the purpose of use.

• Journal of the Korean Institute of Navigation
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• v.25 no.1
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• pp.61-75
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• 2001

There are two different groups of vessels which have a duty to avoid the other vessel in the Collision Regulations； one is a vessel to keep out of the way and the other is a vessel not to impede the passage. The definition and duty of a vessel not to impede was clarified by IMO＇s adoption of rule 8(f) of 1972 COLREG in 1987 revision. However, the Korean government has not inserted rule 8(f) of 1972 COLREG into Korean national collision regulations to date and so the definition and application for a vessel not to impede has not been discussed in even academic circle. Recently Korean Supreme Court rendered a verdict on a collision case involved with a vessel not to impede. The writer expresses his view on the duty of a vessel not to impede and criticizes the Supreme Court's judgment, consulting with foreign scholar's article and the relevant IMO's papers.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2006.11a
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• pp.367-372
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• 2006

Government is not only the biggest owner in public sector, but also the leader responsible for improving and fostering construction industry. Delivery systems and award methods are enacted as laws via government's strong will for construction innovation. In addition to establishing relationships between government and contractor, delivery systems and award methods affect every aspect of industry. Therefore, the government should keep trying to remove inefficiency and achieve Best Value. This paper analyzes the delivery systems and award methods of advanced countries to extract lessons for Korean industry focusing on leading parties, direction, and change in owner's awareness of their respective innovative movements for construction. The prerequisites for improvement in delivery systems and award methods are suggested as partnership between public and private sectors, consistent innovation, enhancement in efficiency, and reinforcement of owner's capability.

• Korean Journal of Construction Engineering and Management
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• v.11 no.3
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• pp.33-42
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• 2010

Recently construction industry has faced new era as following the advances of IT technology. It becomes possible that information and knowledge among people are exchanged actively thanks to computer-based tools. In fact, the tools, PMIS(Project Management Information System) and KMS(Knowledge Management System) already have been introduced to constuction industry successfully. Lately IETM(Interactive Electronic Technical Manual) is tried to be one of these systems. This trying is being enlarged that the IETM's concept is changed to administrative and legal process provider throughout the lifespan of construction projects. However, it is hard to define construction IETM in mega-scale project like urban regeneration project because construction projects are complex and have diverse stakeholders. These properties may make the IETM ambiguous system. To do define IETM as a administrative and legal process provider, this research will conduct survey and interview, then analyze its own properties and find out design strategies. Based on the properties and strategies, suggesting IETM's system demands and architecture of urban regeneration processes.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2005.11a
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• pp.18-19
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• 2005

EDDC(Evaporation using Drum in Dual Chamber) deposition system was manufactured for 100m long superconducting coated conductor. It is composed of reaction chamber, evaporation chamber and differential chamber. The drum is located across the differential and exposed to both of the evaporation chamber and the reaction chamber, and the tape is wound on the drum. The elements of superconducting material are co-evaporated from respective element boats in the evaporation chamber and deposited on the drum and reacted with oxygen in the reaction chamber. This process repeats by rotating the drum. When the total pressure of the reaction chamber was 5 mTorr, that of the evaporation chamber was $5{\sim}10^{-5}$Torr. This atmosphere can be achieved by means of differential pumping. There are four evaporator in the evaporation chamber. One is the radiation heating evaporator and the others are the high frequency induction evaporator. EDDC is one of promising methods for commercialization of superconducting coated conductor.

• Journal of the Korea Concrete Institute
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• v.18 no.4 s.94
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• pp.479-487
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• 2006

This paper deals with a research about the time-dependent behavior analysis for pre-tensioned high-performance concrete(HPC) members. By improving AASHTO-LRFD(2004) method for predicting the creep and shrinkage of normal concrete, and the relaxation of prestressing tendon, a time-dependent behavior analysis of high-performance concrete structures has been introduced. Two methods, the step-function method and the time-step method have been incorporated in the time-dependent analysis. The developed program can predict the initial and time-dependent losses of prestressing forces and the deflections of high-performance concrete structures. The present model has been verified by comparing with the experimental results from the test of time-dependent behaviors of pre-tensioned members using high-performance concrete. From this, the current model gives good relations with the experimental results, but the AASHTO method is not good for the prediction of time-dependent behaviors of high-performance concrete members.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.40 no.8
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• pp.718-725
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• 2012

Fuel or oil which is leaked into the aircraft engine bay can make a fire when it is contacted to the engine surface of hot temperature. In order to avoid fire, the fire extinguish system should be designed so that the extinguishing agent is quickly injected and its concentration keeps higher in the fire protection region. FAA requires that the extinguishing agent injected within the fire protection region should be sustained longer than 0.5 second on keeping a higher concentration than 6%. For developing a fire protection system satisfying the FAA regulation, numerical and experimental studies for the injection time and the concentration of the extinguishing agent were conducted. These results showed similar trend for the injection time or concentration, but the data acquisition was delayed due to the response of the sensors in the experiment.

• International Journal of Highway Engineering
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• v.10 no.4
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• pp.247-255
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• 2008

According to "A guide Book to Highway Design", most road elements are chosen based on a certain design speed in order to ensure obtaining safe and smooth traffic operating. However, road safety in practical way is corelative to not only all element of roads but also road shape, for example, between straight line and curves line and between curved lines. Also, it is relates to alignments such as horizontal alignment, vertical alignment, and cross section. That is, the practical road design should be examined in both sides of 3 dimension and consecutiveness as the practical road is a 3-dimensional successive object. The paper presents a concept for acceleration to evaluate consistency of road considering actual road shape on 3-dimension. Acceleration of vehicle is influential to road consistency based on running state of vehicle and state of drivers. Especially, the magnitude of acceleration is a quite influential element to drivers. Based on above, the acceleration on each point 3-D road can be calculated and then displacement can be done. Computation of acceleration means total calculation on each axis.

• Journal of Korean Home Economics Education Association
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• v.3 no.1
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• pp.147-161
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• 1991

The purpose of this study was to investigate the following contents： 1. Relationship between clothing behavior(modesty, conformity, importance) and clothing regulations of school girls. 2. The differences between middle school girls and high school girls in clothing behavior and in attitude toward clothing regulations. 3. The differences between students herself norms and subiective norms(the students thoughts which would be parents opinions and teachers opinions) in attitude toward clothing regulations. Questionnaires were designed and administered to 300 middle school girls and 302 high school girls in Inchon. The obtained data were statistically analyzed by Pearson’s correlation coefficients, t-test, F-test, and Duncan test. The results of the study were summarized as follows： 1. As tho the differences in responses between school levels, the high school girls showed higher interest in conformity. But there is no differences in Modesty and Importance by school levels. 2. As tho the differences in responses between school levels, there were no differences in attitude toward clothing regulations. But according by types of clothing regulations, high school girls showed higher desire in shoes and sack. 3. In correlation coefficients between the variables on clothing behaviors and the attitudes toward clothing regulations of school girls, modesty is the most related toward clothing regulations of school girls and conformity, importance the next. The higher the school girls are in modesty, the more follow the clothing regulations. And the higher the school girls are in conformity and importance, the lower follow the clothing regulations. 4. The differences between students herself norms and subjective norms(the students thoughts which would be parents opinions and teachers opinions), students and parents showed lower scores than teachers. That is tho say, teachers put more restrictions on students clothing than parents do.

• Journal of Engineering Education Research
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• v.17 no.4
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• pp.87-94
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• 2014

The purpose of this study was to conceptualize the idea of engineering between science and technology, to classify the types of K-9 engineering education, and to develop content standards for it. The primary goal for an engineer is to design, create, and produce new tools, machines, and systems for practical means of human by exploiting technology and science. Engineering is the professional art of using technology, and the practical application of science and mathematics to achieve the optimum conversion of the resources of nature for the benefit of humankind. We reviewed the literatures and documents for background research, had surveys, and interviewed with engineers and educators to set the frame of the content standards for K-9 Engineering education and to construct standards for each sub-component. We developed and suggested the content standards for K-9 engineering education by examining and revising it.