• Journal of the Society of Disaster Information
• /
• v.14 no.3
• /
• pp.305-314
• /
• 2018

Purpose: Dynamic Replacement Method currently lacks of sufficient research, implementation cases, and case histories, compared with other comparable methods, such as Dynamic Compaction Method. Method: In this study, for Dynamic Replacement Method, the effective improvement depth and improved strength were analyzed for silty clayey soils. Results: Testbed test was performed to verify the effectiveness of Dynamic Replacement Method followed by the main dynamic replacement implementation on real construction site. Conclusion: A The effects of changes of soft ground depth, dynamic replacements' diameter, depth, spacing, and applied energy on dynamic replacement efficiency in silty clays were assessed and the followings were found: Empirical coefficient for soil $n_R$ of Dynamic Replacement Method was within the range of 0.14~0.32 and its ${\sqrt{WH}}$ is recommended to be 1.25~2.5 times of those from Dynamic Compaction Method.

• Journal of Digital Convergence
• /
• v.19 no.9
• /
• pp.411-421
• /
• 2021

This study was conducted to compare the effects of student-generated questions (SGQ) and online quiz-based learning (OQL) applied to a physiology and a pharmacology course with 173 nursing students in total. The levels of learning motivation of all participants at 15th week decreased significantly compared with 8th week. There were no statistical difference on learning motivation, communication, and critical thinking between SGQ and OQL, and regardless of the order SGQ and OQL were applied. However, the level of learning satisfaction in students taking pharmacology course was significantly higher in OQL than SGQ (t=2.184, p=.003). We suggest that either SGQ or OQL or both SGQ and OQL be used throughout a semester in biological nursing science subjects without changing teaching strategy during a semester.

• Nuclear industry
• /
• v.17 no.2 s.168
• /
• pp.2-3
• /
• 1997

• Plant Disease and Agriculture
• /
• v.2 no.2
• /
• pp.39-41
• /
• 1996

• The Korea Beekeeping Bulletin
• /
• s.199
• /
• pp.2-2
• /
• 1997

• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.29 no.3B
• /
• pp.213-219
• /
• 2009

In densely urban areas, features such as the sewer system, buildings and river banks have an effect on flow dynamics and flood propagation, and will therefore be accounted for in the model set-up. While two-dimensional (2D) flood models of urban areas are at the forefront of current research into flood inundation mechanisms, they are however constrained by inadequate parameters of topography, and insufficient and inaccurate data. In this study, an urban flood model (overland flow, 2D urban flood flow and sewer flow) was combined and applied at Samcheok city which was damaged by inundation in 2002, in order to simulate inundation depth. The influence of buildings and pumping capacity was also analyzed to estimate the inundated depth in the study area. As a result, it was found that urban inundated depth are affected by pumping capacity directly and it increased about 20-30 cm on most of the modeled area with a building share rate of 0.2-0.6 per unit grid.

• Tuberculosis and Respiratory Diseases
• /
• v.49 no.4
• /
• pp.466-473
• /
• 2000

Background : Patients with locally advanced non-small cell lung cancer are often treated with radiation alone or in combination with chemotherapy. Both modalities have a potentially damaging effect on pulmonary function. In order to examine changes in the cardiopulmonary exercise function of patients with locally advanced non-small cell lung cancer before and after conventional radiotherapy, we conducted a prospective study involving patients with such cancer, that had received radiation therapy. Method : Resting pulmonary function test, thoracic radiographic finding and cardiopulmonary exercise test(CPET) were assessed prior to and 4 weeks following radiation therapy in 11 male patients with locally advanced non-small cell lung cancer. Patient with endobronchial mass were excluded. Results : The forces vital capacity (FVC), forced expiratory volume in 1 second ($FEV_1$ and maximal voluntary ventilation (MVV) did not decreased between before and 4 weeks after radiation but the diffusing capacity (DLCO) had decreased by 11% 4 weeks after radiation, which was not statistically significant. No changes in maximal oxygen consumption ($VO_2$max), carbon dioxide production ($VCO_2$), exercise time and work load were attributed to radiation therapy. Follow up cardiopulmonary exercise testing revealed unchanged cardiovascular function, ventilatory function and gas exchange. No difference in cardiopulmonary exercise test performance was observed between pre- and post-radiation. Conclusion : Cardiopulmonary exercise function did not decrease within the short-term after the radiation of patients with locally advanced non-small cell lung cancer.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.17 no.12
• /
• pp.3001-3008
• /
• 2013

To diagnose the cardiac valve abnormalities using analysis of phonocardiogram, first of all, accurate detection of S1, S2 components is needed for heart sound segmentation. In this paper, a new method that uses the third moment characteristics of an envelope of the PCG is proposed for accurate detection of S1 and S2 components of the heart sound with cardiac murmurs. The envelope of the PCG is obtained from the short-time energy profile, and its third moment profile with slope information is used for accurate time gating of the S1, S2 components. Experimental results have shown that the proposed method is superior to the conventional second moment method for detection of S1 and S2 regions from the heart sound signals with cardiac murmurs.

• The korean journal of orthodontics
• /
• v.37 no.2 s.121
• /
• pp.114-124
• /
• 2007

Objective: The purpose of this study was to examine how the mesio-distal angulation and the length of each tooth changes on panoramic radiograph at different bucco-lingual inclinations. Methods: After constructing an acrylic model based on the mean arch of 30 adults with normal occlusion, the wire was placed in the center of the teeth on the acrylic model. First, the wire was implanted in normal angulation and inclination and a panoramic radiograph taken. After changing the inclination from $I-5^{\circ}\;to\;I+15^{\circ}\;by\;5^{\circ}$, a panoramic radiograph was taken again and the mesio-distal angle and wire length on the panoramic radiograph were assessed. Results: When the wire was implanted at the normal angulation and inclination, the length measured in the panoramic radiograph was magnified $111{\sim}117%$ from the original length in the anterior region and $121{\sim}125%$ in the posterior region. Only the central and lateral incisors showed significant length differences when the inclination was changed from $l-15^{\circ}\;to\;I+15^{\circ}$ at fixed angulation. When the inclination was changed from $l-15^{\circ}\;to\;I+15^{\circ}$, the angulation of most teeth on panoramic radiograph appeared to be more disto-angulated than in reality, and the lateral incisor and canine showed the largest difference. Only $l-15^{\circ}\;to\;I+15^{\circ}$ groups of premolars and $I+15^{\circ}$ group of molars showed more mesio-angulation than in reality. As the labio(bucco)lingual inclination of all teeth were decreased, tooth angulation in the panoramic radiograph appeared to be more disto-angulated. Conclusion: The labio-liugual inclination of teeth should be considered because it affects panoramic image of teeth, such as length of incisors and angulation of other teeth.

• 건강소식
• /
• v.23 no.6 s.247
• /
• pp.4-7
• /
• 1999

모든 것을 긍정적으로 바라보며, 정직과 성실만으로 세상살이를 하는 일. 아름다운 이야기지만 그렇게 사는 일이 말처럼 쉬운 것은 아니다. 그런데, 그 정직과 성실만이 세상을 밝히는 최고의 진리라는 확신으로 살아온 사람이 있다. 심완구 울산광역시장. 그가 울산의 광역시 승격을 주도할 수 있었던 것도, ‘21세기 산업수도 울산 건설’을 위한 장기적이고 야무진 계획을 수립하고 추진할 수 있는 것도, 다방면으로 많이 알아야 국민을 위한 제도로 된 정책을 낼 수 있다는 생각에서 바쁜 중에도 학업을 계속했던 것도 바로 그 확신에 바탕을 두고 있다. 항상 시민의 목소리를 향해 귀를 열어두고, 울산광역시민과 함께 2천 년대 제2의 산업 수도 건설을 위해 오늘도 바쁜 하루를 보내고 있는 작은 거인 심완구 시장의, 미래도시 울산 건설의 청사진을 소개한다.