• Transactions of the Korean Society of Automotive Engineers
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• v.11 no.6
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• pp.37-43
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• 2003

The objective of this work is to investigate the effect of swirl, injection pressure and pilot injection on D.I. diesel combustion by using a transparent engine system. The test engine is equipped with common rail injection system to obtain high pressure and to control injection timing and duration. In this study, the combustion analysis and steady flow test were conducted to estimate the heat release rate from in-cylinder pressure. Soot distribution in diffusion flame according to swirl ratio, injection pressure and pilot injection was investigated by using LII technique. As the results, high injection pressure was found to shorten ignition delay as well as enhance peak pressure and heat release rate was greatly affected by injection timing and pilot injection. In addition, the results showed that the period of soot formation corresponded to the diffusion flame.

• Proceedings of the KSME Conference
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• 2003.04a
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• pp.591-597
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• 2003

The demand of LNG in Korea has dramatically increased since it was first imported in 1986. Thus, more LNG storage tanks are required to meet the growing consumption of LNG. However the design, construction, and analysis of LNG storage facility need highly advanced technology compared to the general structures due to the fluid-structure interaction and the low temperature of LNG. Recently Korea Gas Corporation(KOGAS) constructed a pilot LNG storage tank, and it is in operation to develop and accumulate the core technology. As a part of those objects, the fundamental dynamic test for the pilot tank were performed. For this study, dynamic test were carried out and the dynamic characteristics of the pilot tank were verified and analyzed.

• Journal of the Korean Society of Combustion
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• v.8 no.3
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• pp.31-37
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• 2003

The objective of this work is to investigate the effect of swirl, injection pressure and pilot injection on D.I.Diesel combustion by using a transparent engine system. The test engine is equipped with common rail injection system to obtain high pressure and to control injection timing and duration. In this study, the combustion analysis and steady flow test were conducted to estimate the heat release rate from in-cylinder pressure and pilot injection was investigated by using LII technique. As the results, high injection pressure was found to shorten ignition delay as well as enhance peak pressure and heat release rate was greatly affected by injection timing and pilot injection. In addition, the results showed that the period of soot formation corresponded to the diffusion flame.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2004.11a
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• pp.546-549
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• 2004

The T-50/A-50 Golden Eagle was developed for a supersonic trainer and light combat aircraft. At the design stage, vibration control plans were established and applied. For cockpit vibration, crew comfort vibration level was defined by the requirement of MIL-A-8892. It is found that the T-50/A-50 meets the requirement of cockpit vibration from the flight test data analysis. This paper contains the results of cockpit vibration analysis using the flight test data and the results of human vibration analysis lot the pilot inside aircraft. The human vibration level of pilot is increased as dynamic pressure is increased and at the specific high dynamic pressure, the ride comfort indicates 'a little uncomfortable'. Overall analysis results show that the vibration level of T-50/A-50 cockpit is tolerable and not critical for pilot's comfort.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.7 no.3
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• pp.161-166
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• 2012

With recent increase in interest on health through extension of life expectancies of people, desire of smokers to stop smoking is also getting stronger. Korean medicine uses Auricular Acupuncturing as a treatment to stop smoking. This Study examined whether Auricular Acupuncturing is actually effective by manufacturing device that can stimulate lung point and endocrine point that are known to be effective in stop smoking through low frequency stimulation. Firstly, Low Frequency Stimulator for Auricular Acupuncturing to quit smoking (HBN-001) was developed as an experimental device by combining low frequency stimulation to auricular acupuncture points and headset, and was pilot tested on 20 subjects. The average quantity of cigarette smoked prior to the application of the procedure was 12.19, which was reduced to 10.34 cigarettes after 2 weeks with more than 5 sessions of Auricular Acupuncturing. However, there was no statistically significant difference. The changes in the desire to smoke following the procedure included 4 subjects (20%) with no change, 4 (20%) with slight reduction, 4 (20%) with 25%~49% reduction, 6 (30%) with 50%~75% reduction, 1 (5%) with 75%~99% reduction and 1 (5%) with complete elimination of desire to smoke. Changes in how cigarette smoking tasted included 2 subjects (10%) with slight improvement, 7 (35%) with no change, 6 (30%) with slight worsening and 5 (25%) with substantially worsened taste. Based on the results of the Pilot Test, it appears that Auricular Acupuncturing could be affirmatively helpful in quitting smoking, and further researches in greater depth would be necessary in the future.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.18 no.1
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• pp.83-88
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• 2010

The study is intended to help to select the pilot candidates with exceptional flight aptitude ability and to investigate the relationship between the results of the scholastic aptitude test and the flight aptitude. It is intended that the research will help to draw recommendations on the relevant fields of the scholastic aptitude test that is to be used to select the high caliber candidates with exceptional flight aptitude ability, to gauge the resulting effectiveness of its application and helping to revise the university's syllabus accordingly. From the study, korean, mathematics, english grade and the flight aptitude test results have all shown to hold mutual relationship and through simple correlation analysis, it was discovered that mathematics and English are the two factors that affect the results of the flight aptitude test, with the extent of its impact graded in descending order of English, mathematics and Korean. Lastly, the logistic regression analysis have discovered that the mathematics grade has significant effect on the classification of the flight aptitude and non aptitude category groups, and English also has significant influence close to the 0.05 p-values. It is believed that should the findings of this study be considered as part of the selection process of the university applicants of the department of aeronautical science, making discovery of candidates of higher quality is expected.

• 유체기계공업학회:학술대회논문집
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• 2005.12a
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• pp.431-433
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• 2005

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2012.04a
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• pp.81-84
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• 2012

건축물에서 화재가 발생할 경우 연기에 의한 요인이 인명피해의 주요 원인으로 파악되고 있다. 특히 건축물이 고층화, 복합화, 대형화되면서 화재시 연기에 취약한 건축물이 증가하고 있고, 또한 기존의 연기제어 설계기준이 개선되어야 할 필요가 발생하고 있다. 이러한 요구에 부응하기 위해서는 새로운 조건에 대한 연기확산 및 연기제어에 대한 수행되어야 하며, 이론 수치해석적 연구와 더불어 실제적인 실험적 연구가 되어야 한다. 한국건설기술연구원 화재안전연구센터에는 5층규모의 제배연 실험동이 건립되어 있으며, 다양한 건축물 조건 및 연기제어 방식에 따른 실규모의 실험적 연구가 가능하도록 설비가 구성되어 있다. 본 논문에서는 이러한 Pre-Pilot Test Bed의 구축현황과 관련 실험내용을 소개하고자 한다.

• International Commerce and Information Review
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• v.6 no.3
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• pp.321-349
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• 2004

Bolero Project initially had the support of TEDIS, and now is a joint-venture between SWIFT and IT Club. After the successful testing of an original pilot project, The Bolero Association was formed in 1995 by a group of interested cross industry companies. A Bolero Bill of Lading replicates the basic functions of a paper-based bill of lading via title registry service and core messaging platform. A Bolero Bill of Lading consists of BBL Text and Title Registry Record. A Tittle Registry Record carries out the function of a document of title and a BBL may be transferred by changing the roles of users in this Title Registry Record. TEDI Project had been conducted from the April 1999 to the September 2000 on the basis of the EDEN Project(Dec.97- Mar. 1999) and International Trade Guidances Project (Nov. 1998-Mar. 1999). Through TEDI Project, the RSP Model was introduced as e-trade solution like Bolero's Solution. The RSP Model Solution will be furnished through TC (Trade Chain) Server and RSP(Repository Service Provider) Server. The purpose of this paper is to study the problems and solutions in the pilot test of electronic Bill of Lading using TEDI's RSP and to promote the introduction of electronic Bill of Lading.

• Journal of Engineering Education Research
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• v.17 no.4
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• pp.21-24
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• 2014

The purpose of this study is to develop the engineering students leadership program and evaluate the pilot test. To this end, literature reviews covering various leadership programs were studied and a needs analysis survey was conducted. The needs analysis survey found that student subjects believe leadership to be an important quality, but that the current availability of leadership training programs is lacking. Furthermore, results of the study are as follows, with respective results listed in descending order. The majority of students selected on-line learning as their preferred training method, followed by blended learning and in-person learning. Students also indicated their preferred instructional method to be through on-line courses. Based on these results, a preliminary pilot program was experimentally launched for only 1 class's use. This process of the development for the Engineering Leadership Program consists of 4 stages. The first stage is a needs analysis survey, followed by the design of the program based on results from the needs analysis survey. Afterwards comes the development stage, followed by the implementation stage, comprised of two parts; the pilot test and the distribution. The final stage is the overall evaluation step. We are currently in the first step of the third stage (the pilot test) and only the overall evaluation stage remains. After the distribution, a follow-up study will be conducted to analyze the effectiveness of the implemented program.