• Journal of the Earthquake Engineering Society of Korea
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• v.24 no.3
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• pp.123-128
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• 2020

Analysis of the 2016 Gyeongju earthquake and the 2017 Pohang earthquake showed the characteristics of a typical high-frequency earthquake with many high-frequency components, short time strong motion duration, and large peak ground acceleration relative to the magnitude of the earthquake. Domestic nuclear power plants were designed and evaluated based on NRC's Regulatory Guide 1.60 design response spectrum, which had a great deal of energy in the low-frequency range. Therefore, nuclear power plants should carry out seismic verification and seismic performance evaluation of systems, structures, and components by reflecting the domestic characteristics of earthquakes. In this study, high-frequency amplification factors that can be used for seismic verification and seismic performance evaluation of nuclear power plant systems, structures, and equipment were analyzed. In order to analyze the high-frequency amplification factor, five sets of seismic time history were generated, which were matched with the uniform hazard response spectrum to reflect the characteristics of domestic earthquake motion. The nuclear power plant was subjected to seismic analysis for the construction of the Korean standard nuclear power plant, OPR1000, which is a reactor building, an auxiliary building assembly, a component cooling water heat exchanger building, and an essential service water building. Based on the results of the seismic analysis, a high-frequency amplification factor was derived upon the calculation of the floor response spectrum of the important locations of nuclear power plants. The high-frequency amplification factor can be effectively used for the seismic verification and seismic performance evaluation of electric equipment which are sensitive to high-frequency earthquakes.

• Korean Journal of Child Studies
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• v.33 no.6
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• pp.85-107
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• 2012

In this study, the Infants & Toddlers' Playfulness Scale(ITPS) was developed and its reliability and validity were examined. The participants in this study consisted of 656 parents whose children were 8 to 36 months old. Five factors were identified from the results of the exploratory factor analysis performed on the 29 items that had been derived by analyzing existing research. The Goodness of Fit Indices(GFIs) of the confirmatory factor analyses, performed on the 1st-order 5-factor model and the 2nd-order one factor model, were both satisfactory. Concurrent validity was established by the high correlations of r = .631~.808(p < .01) between each factor of the ITPS and the total score of the Children's Playfulness Scale(CPS), an existing measure for children's playfulness. The reliability of each factor, as measured by Cronbach's ${\alpha}$, ranged from .773 to .883. Consequently, the ITPS developed in this study can be seen as a reliable and valid scale that can be used by parents to measure the playfulness of their infants and toddlers in a multi-dimensional manner.

• Journal of the Korean Home Economics Association
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• v.37 no.1
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• pp.109-118
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• 1999

The effective construction for ready-made clothes is one of the central concerns of both consumers and manufactures in today's apparel industry. So in order to reduce the burden of stocks and increase clothing fitness, systematic information on typical body size and somatotypes is essential. This study was performed to provide fundamental data on junior high school girls' somatotype by classifying the lower body somatotype and analyzing the characteristics of each somatotype. The subject were 234 Korean Junior High School Girls. The subjects were directly measured anthropometrically and indirectly analyzed photographically. The result of factor analysis indicated that 6 factors were extracted through factor analysis and those factors comprise 70.2% of total variance. Using factor scores cluster analysis was carried out and the subject were classified into 3 cluster as their lower boby front and side silhouette.

• Journal of Korea Multimedia Society
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• v.24 no.12
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• pp.1632-1640
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• 2021

In order to improve target tracking performance of the conventional electro-optical tracking system (EOTS) in the high speed and high maneuvering vehicle, an EOTS navigation algorithm is proposed, in which an inertial measurement unit(IMU) is included and navigation results of the vehicle are used. The proposed algorithm integrates vehicle's navigation results and the IMU and the time-delay and the scale factor errors are augmented into the integrated Kalman filter. In order to evaluate the proposed navigation algorithm, a land vehicle navigation experiments were performed a navigation grade navigation system, TALIN4000 and a tactical grade IMU, LN-200 and a equipment for roll motion were loaded on the land vehicle. The performance evaluation results show that the proposed algorithm effecting works in high maneuvering environment and for the time-delay.

• Korean Journal of Oriental Medicine
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• v.5 no.1
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• pp.73-79
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• 1999

In this research we proceeded experiments to find the basis which make it possible to explain the physical and pathological process of Sasang constitutional medicine, in the way substituting hematopoietic-immune system(essence of life, blood, Ki and mental faculties : 精血氣神) Under these suppositions, the essence of life(精) is the multipotent stem cell which has the possibility to be specialized to any cell, the Ki(氣), blood(血) and mental faculties(神) are inferred that they are formed from specialized the essence of life(精), the blood(血) is the red blood cells and etc. that appears as the result of the genesis of circulation system. The Ki(氣) is from specialized basic immunity, the mental faculties(神) means long-term memories or combined immunity. Cytokines can act as specilaizing, growing factors and particiate in extremly combined procedure being controlled by both positive and negative specializing signals. Blood gathering was carried out in the morning and on empty stomach. The plasma was seperated and Erythropoietin, Stem cell factor, Granulocyte-colony stimulaing factor, Tumor necrosis factor, interlukin-3, Interleukin-6 were measured with ELISA kit. According to the result of post analysis by Duncan, each constitution is different in SCF(stem cell factor), IL-6(interleukin-6), EPO(erythropoietin). The value of Stem cell factor is high in order of Soumin(少陰人), Soyangin(少陽人), and Taeumin(太陰人), The value of interleukin-6 is high in Taeumin, Soumin, and Soyangin. Erythropoietin is high in order of Soumin, Soyangin, and Taeumin.

• Journal of the Korean Institute of Educational Facilities
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• v.24 no.3
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• pp.15-21
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• 2017

The purpose of this study was to develop satisfaction scale of school toilet that was completed repair work and examine its validity. In order to develop general and scientific satisfaction scale, the data was collected and analyzed targeting 3,694 participants from seventy schools which were elementary, middle, and high schools participating in improvement projects of school toilet in 2015 and 2016. Satisfaction scale of seventeen items was developed by using exploratory factor analysis and confirmatory factor analysis. Total Cronbach's ${\alpha}$ of seventeen items resulted in .950. Factor loading indicated over 0.6. Factor explanation of each item showed that was relatively high. This scale can be used to research unit school satisfaction and utilized for further research. The implication of this study was a reliable and valid instrument for measuring the satisfaction of school toilet.

• The KSFM Journal of Fluid Machinery
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• v.8 no.1 s.28
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• pp.16-22
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• 2005

This paper presents the method of ROL(Rate Of Loading) improvement for the Motor Operated Gate Valve operated in high differential pressure condition. ROL is one of the most important evaluation parameters for the valve ability. It is close to correlation in stem factor (SF) and appears different value by the differential pressure of fluid. ROL and SF are analyzed by the static test and dynamic test. The obtained result show that the modification of stem factor is very important factor for the ROL improvement. In order to obtain the same value of SF between static and dynamic test, stem and stem nut should be combined appropriately by the repetition test.

• 유체기계공업학회:학술대회논문집
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• 2003.12a
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• pp.562-567
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• 2003

This paper presents the method of Rate of Loading(ROL) improvement for the Motor Operated Gate Valve operating in high differential pressure condition. The character of ROL and Stem Factor is analyzed. Static test and dynamic test were performed and acquired the diagnosis signal for the valve closing stroke. The result of this study is the modification of stem factor is very important factor for the ROL improvement. In order to obtain the same value of dynamic test thread friction coefficient stem and stem nut should be combined appropriately.

• Journal of Genetic Medicine
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• v.7 no.1
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• pp.1-8
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• 2010

Hemophilia A is a sex-linked recessive coagulation disorder associated with diverse mutations of the factor VIII gene and a variety of phenotypes. The type of mutation involved dictates the activity of factor VIII, and in turn the severity of bleeding episodes and development of alloantibodies against factor VIII (inhibitors). Missense mutations are the most common genetic risk factors for hemophilia A, especially mild to moderate cases, but carry the lowest risk for inhibitor development. On the other hand, intron 22 inversion is the most common mutation associated with severe hemophilia A and is associated with high risk of inhibitor formation. Large deletions and nonsense mutations are also associated with high risk of inhibitor development. Additional mutations associated with hemophilia A include frameshift and splice site mutations. It is therefore valuable to assess the mutational backgrounds of hemophilia A patients in order to to interpret their symptoms and manage their health problems.

• Journal of the Korean Institute of Landscape Architecture
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• v.26 no.3
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• pp.249-257
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• 1998

This study was to evaluate residents' environmental cognition, satisfaction and needs of distinctive outdoor space in apartment housing estates. Distinctive outdoor space of 75 apartment estates throughout the country were investigated. And the residents of 16 apartment estates were asked how they cognize disticntive outdoor space qualities, and what activities they prefer in apartment's outdoor space. Thre important factors were extracted in residents' cognition of distinctive outdoor space qualities. First factor was naturalness of the greenery, second factor was outdoor activities especially related to fitness and exercise, and third factor was design of street furniture. Residents' satisfaction degree of distinctive outdoor space tended to increase as high as the occupied housing area. Places with water, tree shades, pedestrian way, greenery with flowers, playlots, fitness places and entrances of the estates were evaluated high in the order named. And places full with greenery, places related to fitness and exercisem, playlots were prefered by the residents.