• 대한소아치과학회지
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• 제2권1호
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• pp.67-75
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• 1975

The conserative treatment of the necrotic and infected primary molars is often necessary in order to avoid extractions which may lead to inability to masticate or loss of space and subsequent problems concerning the development of the occlusion in the permanent dentition. The purpose of this study was to evaluate the clinical significance of the conservative treatment of the infected primary molars with necrotic pulps employing the formocresol pulpotomy technique same as in vital teeth and surgical intervention in the cases with a parulis, fistula or cellulitis. The materials consisted of 25 primary molars of 9 boys and 4 girls ranging in age from 4 to 7 years. This study included clinical and radiographic observation at 3-month intervals postoperatively. The following results were obtained. 1. Clinically, 20 cases of 25 were successful, exhibiting no clinical problems such as fistula, mobility, toothache and tenderness to percussion, etc. 5 cases were regarded as failures. 2. Radiographiclly, 14 cases revealed normal features, in 6 cases slight rarefaction was observed in the periapical and interradicular region, and marked periapical and interradicular rarefaction was observed in 5 cases. 3. Marked bony deposition was observed in the periapical and interradicular regions in all the remainder except for 5 failurese. 4. Pathologic root resorption was observed in 2 cases. 5. No alveolodental ankylosis was observed. 6. Regeneration of the dental sac of the permanent tooth was observed in 1 case of 2 cases which had revealed loss of the dental sac.

• Restorative Dentistry and Endodontics
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• 제24권3호
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• pp.447-452
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• 1999

The role of bacteria in root canals and periapical infections is well known and established. In these bacteria, black-pigmented bacteria(BPH) play important role in endodontic infection. BPB are Gram negative anaerobic rods which are closely related 50 clinical symptoms such as pain, percussion, tenderness, foul odor, etc. In America and Europe, many studies on BPB have been done and are continued. But, relatively few studies have been done in Korea, especially its prevalence in Korean population is not yet studied. The purpose of this study is to establish prevalence of BPB in infected root canals and periapical abscesses in Korean people. Microbial samples were collected from the root canals of 34 intact tooth with periapical rarefactions of endodontic origin and 3 periapical abscesses. All samples were incubated in an anaerobic chamber(Coy, Model No. 77. Ann Arbor, Michigan, USA.). Identification of In microorganism was based on its growth in the anaerobic chamber, colonial pigmentation, colonial morphology, Gram stain, and Rapid ID32A(BioMericux SA/69280 Marcy-l'Etoile/France) results. In addition, the polyme ase chain reaction using specific primers for 16S rRNA genes were used differentiate Prevotella nigrescens for Prevotella intermedia. The results were as follows : 1. In this study, thirteen (35%) of thirty seven samples were positive for the growth of BPB. In thirteen samples, sixteen strains of BPR were found. 2. The most frequently identified BPB in root canals and abscesses in Korean were P. nigrescens 5/37(14%) and P. intermedia 5/37(14%). Porphyromonas gingivalis 3/37(8%), Porphyromonas endodontalis 2/37(5%) and Prevotella loecheii 1/37(3%) were also found. 3. In this study, no significant differences were found between the prevalence of BPB in Korean and that of American and European.

• Journal of Radiation Protection and Research
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• 제26권1호
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• pp.35-43
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• 2001

특수형 방사성물질 운반캡슐은 국내외의 수송관련 법규에 규정된 기술기준을 만족하도록 설계, 제작되어야 한다. 본 연구의 목적은 하나로에서 생산된 $^{192}Ir$ 특수형 등위원소 운반캡슐의 건전성을 평가하는데 있다. 법규에서 규정된 낙하시험, 타격시험, 굽힘시험 및 가열시험조건에 대한 안전성 시험을 수행하였으며, 각각의 시험 전후에 누설시험을 수행하였다. 또한, 안전성시험과 더불어 컴퓨터코드를 이용한 전산해석을 수행하여 안전성시험 전에 시험결과에 대한 예측자료로 활용되었다. 낙하시험 및 가열시험 결과 캡슐 표면에서 약간의 흠집과 변형이 발생하였으나, 각각의 시험에서 평가기준이 되는 캡슐의 손상이나 용융 등은 발생하지 않았다. 또한 각 시험 후 수행한 누설시험 결과 누설이 발생하지 않았다. 따라서 특수형 방사성물질 운반캡슐은 법규에서 규정하는 기술기준을 만족하도록 설계, 제작되었음이 입증되었다.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2008년도 추계 학술발표회
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• pp.1532-1548
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• 2008

The tunnel type spillways is under construction to increasing water reservoir capacity in Dae-am dam. The tunnel outlet was planned to be made after installing slope stabilization system on natural slope there. Generally, the tunnel outlet is made perpendicularly to the slope, but in this case, it had to be made obliquely to the slope for not interrupting flow of river. Because of excavation in condition of natural slope caused to deflecting earth pressure, the outlet couldn't be made. So, artificial ground made with concrete that it was constructed in the outside of tunnel for producing the arching effect which enables to make a outlet. We were planned tunnel excavation was carried out after artificial ground made. Artificial ground made by poor mix concrete of which it was planned that the thickness was at least 3.0m height from outside of tunnel lining and 30cm of height per pouring. Spreading and compaction was planned utilized weight of 15 ton roller machine. In order to access of working truck, slope of artificial ground was designed 1:1.0 and applied 2% slope in upper pert of it for easily drainage of water. In addition to, upper pert of artificial ground was covered with soil, because of impaction of rock fall from upper slope was made minimum. The tunnel excavation of the artificial ground was designed application with special blasting method that it was Super Wedge and control blasting utilized with pre-percussion hole.

• 한국음향학회지
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• 제34권4호
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• pp.328-334
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• 2015

본 논문은 다양한 타격 강도와 위치에 따른 징의 음향 차이를 소프닝과 맥놀이 분석을 통해 살펴본다. 타격 강도는 아주 강하게, 강하게, 약하게로 구분하였고 타격 위치는 가운데, 위, 오른쪽으로 구분하였으며 분석에는 스펙트로그램을 사용하였다. 소프닝은 징의 가운데를 강하게 타격할수록 명확하게 관측되었고 주파수 이동 폭은 타격 강도와 주파수에 비례하였다. 이러한 현상은 배음에서 두드러졌으며 다른 부분음에서는 불규칙적으로 발생하였다. 맥놀이는 초기 맥놀이와 후기 맥놀이로 분류할 수 있었으며 가운데를 타격할 때보다 측면을 타격할 때 더 넓은 주파수 대역에서 더 많은 맥놀이가 발생한다는 것을 알 수 있었다. 또한 가운데를 타격한 경우 초기 맥놀이에 영향을 주는 배음 주변의 성분들이 있음을 밝혔다.

• Restorative Dentistry and Endodontics
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• 제45권3호
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• pp.40.1-40.12
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• 2020

Objectives: The aim of this study was to evaluate the effects of endodontic treatment on levels of substance P (SP) and calcitonin gene-related peptide (CGRP) in the saliva of patients with symptomatic apical periodontitis. Materials and Methods: Twelve patients with mandibular molars with symptomatic apical periodontitis were enrolled in this study. An initial saliva sample was collected just before administration of anesthesia for root canal treatment, which was performed at the first visit. A second saliva sample was collected at a control visit 1 week after treatment. Salivary SP and CGRP levels were evaluated quantitatively using biochemical assays. The data were analyzed using Pearson correlation analysis, the paired samples t-test, and the Mann-Whitney U test (p = 0.05). Results: The postoperative salivary level of SP was significantly lower than the preoperative level (p = 0.005). However, the postoperative salivary level of CGRP was similar to the preoperative level (p = 0.932). Visual analog scale (VAS) scores of patients' subjective pain were found to be positively correlated with salivary levels of SP (r = 0.421; p = 0.040). No statistically significant correlations were observed between salivary levels of CGRP and VAS scores for patients' subjective percussion tenderness (p = 0.533) or VAS scores for patients' subjective pain (p = 0.459). Conclusions: According to the results of the present study, salivary SP levels may be used as an objective indicator in the diagnosis and assessment of the degree of pain in endodontic diseases.

• 한국실내디자인학회논문집
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• 제19권1호
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• pp.85-93
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• 2010

This study aimed to show the possibility of approaching Steven Holl's Stretto House as a vital space identical to the flow of our consciousness through Bergson's philosophy of life by understanding the expression of Bergsonian duration in the house. For the Purpose of this study, Bergson's concept of aesthetic duration was considered and duration in the Stretto House design process was analyzed, Based on the study's findings, duration according to Bergson's expression of reality in the Stretto House was further analyzed. The results of the analysis of duration in the Stretto House design process showed that duration is expressed as phenomenological time through the continuity and movement of the perceptual phenomena of space, sound, light and material that reflected Merleau-Ponty's anchoring and Bartok's Music for Strings, Percussion and Celesta. The results of the analysis of duration as an expression of reality in the Stretto House showed that duration is expressed as real time, as reality's continuous and diverse movement of vital duration, through the image and rhythm based on the intuitive recollection of the real self, sound, light and pond. Consequently, it was shown that the Stretto House could be understood as a vital space in which a vital movement of duration identical with the flow of our consciousness is expressed through the expression of reality in Bergson's philosophy of life. This study is meaningful as a foundational study of the experiential space of phenomena through Bergson's philosophy of life.

• 디지털융복합연구
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• 제19권12호
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• pp.567-575
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• 2021

본 연구는 중요도-수행도 분석을 통해 복부수술 환자의 조기운동에 대한 외과병동 간호사의 중요도 인식 및 수행 정도를 확인하기 위함이다. 연구대상은 외과병동에서 근무하는 간호사 162명을 대상으로 자가보고 설문지를 이용하여 2021년 3월 8일부터 22일까지 자료를 수집하였다. 수집된 자료는 SPSS/WIN 25.0를 이용하여 기술통계, independent t-test, paired t-test, one-way ANOVA로 분석하였으며 중요도와 수행도는 IPA분석 기법을 사용하였다. 조기운동은 폐합병증 예방운동과 조기이상으로 구분하였다. 연구결과, 집중이 필요한 영역은 흡인위험성 확인, 개선이 필요한 영역은 구강간호, 호흡음 청진, 진동/타진, 필요시 흡인, 강화운동 영역이었다. 따라서 임상에서 조기운동의 중요도 및 수행도의 격차를 줄일 수 있는 방안을 마련하여야 하겠다.

• 한국연극학
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• 제48호
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• pp.359-384
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• 2012

The purpose of this study was to explore the theatrical aesthetics of the performances which was produced by the theater director, Yang Jung-Ung. Yang has been one of the most influential directors working in Korea in the last 15 years. He has put up performances all over the world with the theater members from his company called Yohangza, which was founded by him in 1997, and working as the director, portrayed his style of the theatrical aesthetics through the works of its plays and musical products. In 2012, this company performed A Midsummer Night's Dream at Shakespeare's Globe Theatre. A Midsummer Night's Dream was invited to be staged at the Barbican Center in 2006. In the same year, it received the grand prize and the Audience Choice award at the Gdansk International Shakespeare Festival in Poland. The musical products like A Good Woman from Seoul and the modern Opera Wozeck are representative works of Yohangza, which are known for a unique way of exploring the meaning of life. The 2009 plays Hamlet and Peer Gynt represent Yohangza's simpler yet more insightful theatrical style. Peer Gynt, which debuted at the LG Art Center, made headlines for its innovative staging. It received the grand prix, Best Director and Best Stage Art awards at the 2009 Korea Theater Awards. Yohangza's plays show two-side "image-based" works. The company drastically reduced verbal lines and enriched the plays with Korean sentiment and aesthetics, but their scripts contained many poetic lines full of overtones. They showed a theatrical mise-en-scene of images, energetic dance, songs in chorus and percussion. For example, Korean sentiments were subtly blended into the two Shakespeare's plays, A Midsummer Night's Dream and Twelfth Nights. Their performance combines music, mime, song and dance to create an exhilarating adaptation of Shakespeare's inventive and glittering comedy. In addition, the style of Yohangza Theatre Company is a collision of the past and the present: a reworking of existing Korean styles and themes infused with contemporary elements and full of unique exploration in the plays.

• 한국터널지하공간학회 논문집
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• 제21권4호
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• pp.561-571
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• 2019

NATM 공법을 이용한 터널굴착 시 발파공 천공 및 장약 작업은 전체 터널 굴착 시간의 30% 이상을 차지하는 중요한 과정이다. 최근에는 이 공정을 활용하여 천공작업 도중 얻어지는 타격압, 천공속도 등을 바탕으로 터널 굴착면 전방의 지반상태, RMR 등을 예측하는 연구들이 진행되어 왔다. 하지만 선행 연구들은 대부분 화강암으로 대표되는 화성암질 지반에 대해서만 수행되어 왔다. 본 연구에서는 유사한 RMR의 범위를 가지는 화성암의 천공속도를 퇴적암(특히, 역암, 사암 및 셰일)의 천공속도와 비교/분석하였으며, 유사한 RMR 값을 가지는 암이라 하더라도 암질 종류에 따라서 천공속도가 크게 달라질 수 있음을 확인하였다. 퇴적암에서의 천공속도가 화성암에서의 속도보다 더 빨랐으며, 또한 화성암의 경우 천공속도와 RMR등급에 따른 천공속도의 차이는 거의 없는 것에 반하여, 퇴적암의 경우는 RMR등급이 낮아질수록 천공속도는 증가함을 알 수 있었다.