• Journal of Korea Water Resources Association
• /
• v.52 no.4
• /
• pp.245-253
• /
• 2019

The objectives of this study are to estimate the return period of flash flood and evaluate its appropriateness based on the actual observation events for small mountainous watersheds in the Han River basin. For these goals, Flash Flood Guidance (FFG) was estimated from 1-hr duration Threshold Runoff (TR) and Saturation Deficit (SD) of soil moisture which was derived from Sejong University Rainfall Runoff (SURR) model. Then, the return period of flash flood was calculated by comparing the rainfall quantile to the 1-hr duration rainfall that exceeded the FFG during the past period (2002-2010). Moreover, the appropriateness of the estimated return period of flash flood was evaluated by using the observation events from 2011 to 2016. The results of the return period of flash flood ranged from 1.1 to 19.9 years with a mean and a standard deviation of 1.6 and 1.1 years, respectively. Also, the result of the appropriateness indicated that 83% of the return periods derived from observation events were within the return period of flash flood range. Therefore, the estimated return period of flash flood could be considered as highly appropriate.

• Journal of Cadastre & Land InformatiX
• /
• v.51 no.1
• /
• pp.111-124
• /
• 2021

Recently, Interest in the restoration and 3D reconstruction of cultural properties due to the fire of Notre Dame Cathedral on April 15, 2019 has been focused once again after the 2008 Sungnyemun fire incident in South Korea. In particular, research to restore and reconstruct the actual measurement of cultural properties using LiDAR(Light Detection and ranging) and conventional surveying, which were previously used, using various 3D reconstruction technologies, is being actively conducted. This study acquires data using unmanned aerial imagery of UAV(Unmanned Aerial Vehicle), which has recently established itself as a core technology in the era of the 4th industrial revolution, and the existing CRP(Closed Range Photogrammetry) and terrestrial LiDAR scanning for the Recumbent Buddha of Unju Temple. Then, the 3D reconstruction was performed with three fusion models based on SfM(Structure-from-Motion), and the reproducibility and accuracy of the models were compared and analyzed. In addition, using the best fusion model among the three models, the relationship with the Polar Star(Polaris) was confirmed based on the real world coordinates of the Recumbent Buddha, which contains the astronomical history of Buddhism in the early 11th century Goryeo Dynasty. Through this study, not only the simple external 3D reconstruction of cultural properties, but also the method of reconstructing the historical evidence according to the type and shape of the cultural properties was sought by confirming the historical evidence of the cultural properties in terms of spatial information.

• Journal of Digital Convergence
• /
• v.14 no.10
• /
• pp.499-506
• /
• 2016

This study is focused on showing possibilities and limitations of the disabled men roles through the relationships with migrant women in korean novels, furthermore it is discovering the problems and the directions for successful cohabitation of the disabled men and migrant women in Korea. To accomplish this purpose of study, we analyzed and criticized 5 Korean novels which described the life of a disabled man with a migrant woman in Korean multicultural society. As a result, the disabled man in those relationships represented the man who was only true to his own desires or the man of the minority in social restraint due to disability and also those men can be classified as attackers or helpers for their migrant lovers. These formulaic expressions being problematic by themselves also facilitate making distorted images of the disabled men and migrant women.

• The Journal of the Korea Contents Association
• /
• v.16 no.8
• /
• pp.493-507
• /
• 2016

This study aims to examine the representations of elders in reality shows focusing on gender disparity by employing a textual analysis and audience interviews. According to findings, as for elderly men, various images are presented while as for elderly women, traditional gender images are mainly reproduced. In the audience reception, the audiences' understanding of genres and their preexisting gender perceptions have important roles on their interpretations in the ways of producing gender discriminated meanings.

• Journal of the Korean Society for Aeronautical & Space Sciences
• /
• v.32 no.4
• /
• pp.95-100
• /
• 2004

This paper represents the development of a CLS(Control Loading System) for a target a airplane (KT-1) with mechanical linkage reversible flight control system. The system is composed of mechanical frame, controller, sensing part to measure the force from the stick, driving system generating the reaction forces. The DS1103 DSP(Digital Signal Processor) of the dSpace Corp. was used as the controller. The control algorithm of the CLS and the operational environment including monitoring software and evaluation tools are described. The evaluation of the system was conducted according to the requirement specification. The results of the test were analyzed by comparing with the actual data of the target airplane.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.21 no.5
• /
• pp.679-686
• /
• 2020

In this study, the seismic vulnerability of public river levees was analyzed quantitatively. Input seismic waves were generated in Pohang seismic waves in return periods of 200, 500, 1000, and 2400 years. The behavior of the levee was analyzed by seismic vulnerability analysis according to the return period. The displacement that occurs during an earthquake showed the same tendency as the input seismic wave and was largest in the return period of 2400 years. An analysis of the sliding stability revealed a 31.5% and 26.7% decrease in the sliding safety factor for the return period of 2400 for the landside and waterside, respectively. An examination of liquefaction by the q/p' ratio showed that the seepage line inside the embankment rises due to earthquakes. As a result, in the case of a return period of 2400 years, most embankments generate liquefaction, making them vulnerable to earthquakes. Through this research, it will be necessary to re-establish domestic seismic-design standards and establish clear standards for the results through a dynamics method.

• Journal of the Korea Institute of Building Construction
• /
• v.16 no.1
• /
• pp.25-34
• /
• 2016

From 1990's, a study on the development of exothermic concrete, a concrete which electro-conductive material is mixed, has been proceeded. However, due to the difficulty of exothermic reproducibility of concrete specimen, the study has been unable to continuously carried out. Accordingly, this study was focused on developing an exothermic concrete for the purpose of snow-melting material. Cement paste and mortar specimens mixed with graphite, conductive metal powder and chemical admixture were made. The evaluation of exothermic performance and reproducibility was conducted under $-2^{\circ}C$ of low temperature. In addition, micro-chemical analysis was carried out to investigate a cause of exothermic reproducibility. As a test result, the specimen mixed with graphite and superplasticizer with air entrained showed the best exothermic performance and reproducibility. Through micro-chemical analysis, it is judged that polymer or methacrylic acid (MAA), the contents inside the superplasticizer with air entrained, gave exothermic reproducibility by generating the electrochemical reaction with graphite.

• The korean journal of orthodontics
• /
• v.30 no.3 s.80
• /
• pp.307-315
• /
• 2000

This study was performed to evaluate the reproducibility of natural head position according to skeletal malocclusion types and sex using cephalometric radiographs for establishing orthodontic diagnosis and treatment planning. The sample consisted of 90 young adults (male 45, female 45) who had the skeletal malocclusion. Cephalometric radiographs were taken in natural head position, and statistical analysis was performed and method error of 6 postural variables were estimated to evaluate the reproducibility of the natural head position. The following results were obtained : 1. In the reproducibility of the natural head position, postural variables had no statistical significance In male and female (P>0.05). 2. In the reproducibility of the natural head position, postural variables had no statistical significance in Class I, II, III, and total group (P>0.05). 3. The reproducibility of natural head position using method error was excellent in all groups.

• Cartoon and Animation Studies
• /
• s.32
• /
• pp.221-244
• /
• 2013

The purpose of this study was to concentrate on macroscopic discussion about how the recurrence of actual case in move is accepted ideologically. When considering the characteristic that non-visual factors are embodied when movie image reflects a certain target, the issue of recurrence has always caused discussion. Regardless of its independence or dependence, one individual's experience can be similar to sensual recognition but it can't be identical. Therefore, 'the truth recurred by movie' can't be real 'truth'. When director expresses the target, the aesthetic intention gives an effect to audience's emotion and recognition, Therefore, the study tries to review whether the movie truth drawn by movie can reach the possibility of epistemology agreement.

• Progress in Medical Physics
• /
• v.13 no.3
• /
• pp.135-138
• /
• 2002

Fractionated stereotactic radiosurguy (FSRS) requires precise and reproducible patient set up. For these reasons non-invasive mask fixation methods have been used in Linac based FSRS. In this study, we measured and assessed the isocenter reproducibility using a commercial head mask fixation system based on thermoplastic materials. For the verification and the measurement of isocenter deviation a special acrylic brain phantom was designed. The designed phantom has 22 vertical rods and each rod has different lengths. At the end of the 8 rods, the monochromic film is attached and irradiated due to planned target position. Deviations of isocenter were measured separately for each direction. The mean deviation showed 0.4 mm in longitudinal direction, 0.1 mm in the lateral direction, 0.1 mm in the anterior-posterior direction of the treatment couch. The data demonstrates the high accuracy and reproducibility. This study reinforces previous literature published.