• Transactions of the Korean Society of Automotive Engineers
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• v.16 no.1
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• pp.52-63
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• 2008

The side collision reconstruction algorithm is developed using three dimensional car crash analysis. Medium size passenger car is modeled for finite element analysis. Total 24 side collision configurations, four different speed and six different angle, are set up for making side collision database. Deformation index and degree index are built up for each collision case. Deformation index is a kind of deformation estimate averaging displacement of side door of crashed car from finite element analysis result. Angle index is constructed measuring deformed angle of crashing car. There are two kinds of angle index, one is measured at driver's side and the other is measured at passenger's side. Also a collision analysis information in side of cars is used for giving a basis for scientific and practical reason in a reconstruction of the car accident. The analysis program, LS-DYNA3D is utilized for finite element analysis program for a collision analysis. Those database are used for side collision reconstruction. Side collision reconstruction algorithm is developed, and applied to find the collision conditions before the accident occurs. Three example collision cases are tried to check the effectiveness of the algorithm. Deformation index and angle index is extracted for the case from the analysis result. Deformation index is compared to the established database, and estimated collision speed and angle are introduced by interpolation function. Angle index is used to select a specific collision condition from the several available conditions. The collision condition found by reconstruction algorithm shows good match with original condition within 10% error for speed and angle. As a result, the calculation from the reconstruction of the situation is reproducing the situation well. The performance in this study can be used in many ways for practical field using deformation index and degree index. Other different collision situations may be set up for extending the scope of this study in the future.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.4 no.3
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• pp.248-251
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• 2003

In this paper, a new segmentation method of machine printed character string with arbitrary length is proposed. Character recognition requires character segmentation as a previous step. However character segmentation itself requires a character recognition capability for less error segmentation. It is necessary to attack both these problem simultaneously. It is proposed that a new recognition-based segmentation method, which recognizes a character in touching characters with help of defined side-profiles. The match of ‘side-profiles of touching characters' with ‘side-profiles of prototypes' gives single character candidates in touching characters. It segments touching characters according to cutting costs.

• Proceedings of the KIPE Conference
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• 2004.07a
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• pp.346-349
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• 2004

The design of DC-DC converters for power electronic interfaces in power management systems for Hybrid Electric Vehicle (HEV) is a very challenging task. In this paper, the considered topology is the hi-directional buck-boost converter and inverter system. If we make the converter side DC link current the same as the inverter side DC link current in a converter-inverter system, no current will flow through the BC link capacitor and as a result, no DC link voltage variation occurs. This leads to the possibility of reducing small th size of DC link capacitors which are expensive, bulky. Therefore we propose the converter current controller which can manage to match inverter and converter current at the DC link.

• Proceedings of the Korean Institute of Industrial Safety Conference
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• 1998.11a
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• pp.267-270
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• 1998

Current valve protection cover had problem that the hight of cover cap and road level could not match when the road was repaired and overcovered. But new developed device can solve this problem by forming several grooves in the connecting pipe. This device is devided into col=netting pipe (down side) and cap part.(upper side) On the outside diameter of connecting pipe, several horizontal grooves and two vertical grooves are formed. Through the horizontal grooves, the hight of cap part ran be adjusted with ground level. Therefore, this device can help easy maintenence in running water pipe.

• Journal of architectural history
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• v.30 no.4
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• pp.31-39
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• 2021

Jukseoru is a pavilion building located in 44 Jukseoru-gil, Samcheok-si, Gangwon-do. Jukseoru is characterized by the fact that the center 5 bays out of the front 7 bays are in the form of Jusimpo, while the ends of each side are in the form of an Ikgong. In addition, the columns are not aligned with each other because the columns of both compartments are out of the center rather than the columns of the center of the five compartments of the columns do not match each other. Based on this, architectural historical circles initially built five bays in pairs, but later added one space to each side to make it seven bays. Recently, however, a new claim has been made that it was built with seven bays from the beginning. Therefore, this paper proved that Jukseoru were expanded through historical data. We also looked at the characteristics of the Jukseoru period and the process of transformation through comparison of the bracket type.

• Journal of Physiology & Pathology in Korean Medicine
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• v.17 no.6
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• pp.1368-1375
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• 2003

Treatise Yin-Yang is based on Chun-chu-shi-dae and composed in Jen-guk-shi-dae and the systemic constant is effected at the age of Han-dae. This study needs the deep philosophic understanding and principal. In conclusion, the parting and meeting of Yin-Yang is conducted by the parting and meeting of Three-yin-three-yang. In addition, this theory is based on the Taoism. Yin-Yang is embodied by Sky-Ground-Sun-Moon, had the meaning of time and place and accomplished their own rules with identification as one. Taechung and Gwangmyeng are the concretely applied form of the parting and meeting of Yin-Yang at human body. The parting and Meeting of Three-Yin- Three-Yang has six types symbols of circulated Yin-Yang. They have Six-meeting space structure as match like up-down, backside and front-side, left-side and right-side. These pairs express symbolized meaning of creation of Saeng-jang-shu-chang and also apply the same things.

• 한국전산유체공학회:학술대회논문집
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• 2004.03a
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• pp.49-55
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• 2004

This paper addresses a numerical simulation of the flow and heat transfer in a simplified model of helically coiled tube steam generator using a general purpose computational fluid dynamic analysis computer code. The steam generator model is comprised of a cylindrical shell and helically coiled tubes. A cold feed water entered the tubes is heated up, evaporates. and finally become a superheated steam with a large amount of heat transferred continuously from the hot compressed water at higher pressure flowing counter-currently through the shell side. For the calculation of tube side two-phase flow field formed by boiling, inhomogeneous two-fluid model is used. Both the internal and external turbulent flows are simulated using the standard k-e model. The conjugate heat transfer analysis method is employed to calculate the conduction in the tube wall with finite thickness and the convections in the internal and external fluids simultaneously so as to match the fluid-wall-fluid interface conditions properly. The numerical calculations are peformed for helically coiled tubes of steam generator at an integral type pressurized water reactor under normal operation. The effects of tube-side inlet flow velocity are discussed in details. The results of present numerical simulation are considered to be physically plausible based on the data and knowledge from previous experimental and numerical studies where available.

• Journal of Environmental Science International
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• v.23 no.7
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• pp.1339-1347
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• 2014

This study were performed on roadside buffer green in Songpa-dong, Songpa-gu, Seoul in order to analyze the anion concentration according to the type of composition of roadside buffer green. Buffer green separating the physical structure of the measurement points and measurement locations were separated by roadside, green interior, the other side of the road. planting density and deposit of trees per each buffer green was measured in the order of mounding type> slope type> the plain type. If the measured temperature of the location-specific weather elements roadside> inside> the other side of the road in order of measurement and the temperature is lowered farther away from the road. If the relative humidity of the road on the other side> inside> the roadside in order to measure and this is the opposite of the temperature tendency. According to physical structure reduction of the temperature on the other side of the road and roadside in order of mounding type> the plain type> slope type was measured. As a result of measuring a anion therefore concentration of the anion inside of melt is in order of mounding type> the plain type> slope type, tended to match the melt characteristics. According to measured positions anion concentration is in the order of the other side of the road> inside> the roadside was measured. As a result of correlation analysis, in the case of measurement location-specific weather and anions the temperature is positive correlation, relative humidity is negative correlation and that's results of previous studies were supported.

• Journal of the Korean Society of Costume
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• v.59 no.1
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• pp.159-167
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• 2009

Based on instructions in the textbook "How to Construct Korean Costumes" which I authored, my university students were required to make Pungcha-Baji(Korean traditional pants for children) for one-year-old boys. While examining the students' construction, I found that the side seams of the vest and pants did not line up but were improperly twisted. It was found that the pants did not cover the child's backside because the width of the back was smaller than the width of the front when one of the side panels and the large center panel in the front was half the size of the hip and one of the side panels and the small panel in the back was four fifths of half the size of the hip. Although there were differences between the waist size of the pants and the bottom hem of the vest, the textbooks instruct that the amount of material and the number of pleats(i.e. 4 pleats) on the pants and the vest should be the same. Finding this mistake led me to investigate Pungcha-Baji construction in related textbooks. Thus with the textbook instruction, the side seams of the pants and the vest do not match and are improperly twisted. Hence, as a solution, the pleats should be made and adjusted after matching the side seams of the pants and the vest. The purpose of this study is to examine currently available Pungcha-Baji related textbooks and determine the correctness of their instructions and to ultimately provide correct construction methods for Pungcha-Baji pattern for academic purposes.

• The korean journal of orthodontics
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• v.50 no.6
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• pp.383-390
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• 2020

Objective: To investigate the distribution, side involvement, phenotype, and associated anomalies of Korean patients with craniofacial clefts (CFC). Methods: The samples consisted of 38 CFC patients, who were treated at Seoul National University Dental Hospital during 1998-2018. The Tessier cleft type, sex, side involvement, phenotype, and associated anomalies were investigated using non-parametric statistical analysis. Results: The three most common types were #7 cleft, followed by #0 cleft and #14 cleft. There was no difference between the frequency of male and female. Patients with #0 cleft exhibited nasal deformity, bony defect, and missing teeth in the premaxilla, midline cleft lip, and eye problems. A patient with #3 cleft (unilateral type) exhibited bilateral cleft lip and alveolus. All patients with #4 cleft were the bilateral type, including a combination of #3 and #4 clefts, and had multiple missing teeth. A patient with #5 cleft (unilateral type) had a posterior openbite. In patients with #7 cleft, the unilateral type was more prevalent than the bilateral type (87.0% vs. 13.0%, p < 0.001). Sixteen patients showed hemifacial microsomia (HFM), Goldenhar syndrome, and unilateral cleft lip and palate (UCLP). There was a significant match in the side involvement of #7 cleft and HFM (87.5%, p < 0.01). Patients with #14 cleft had plagiocephaly, UCLP, or hyperterorbitism. A patient with #30 cleft exhibited tongue tie and missing tooth. Conclusions: Due to the diverse associated craniofacial anomalies in patients with CFC, a multidisciplinary approach involving a well-experienced cooperative team is mandatory for these patients.