타이어/노면 진동 음향 발생 모델에 관한 연구

심순섭 順天靑巖大學 1996 論文集-順天靑巖大學 Vol.20 No.2

A theoretical model has been prepared, which describes the noise generated by tire/road interaction for the tire structure-borne sound analysis. The model begins with a set of thin shell equations describing the motion of the belt of a radial ply tire, as derived by Bohm("mechanisms of the belted tire", Ingeniur-Archiv, XXXV, 1966). Structural quantities required for these equations are derived from material properties of the tire. The rolling shape of a tire is computed from the steady -state limit of these equations. Vibrational response of the tire is treated by the full dependent shell equations. The force input at the tire/road interface is calculated on the basis of tread geometry and distribution of contact patch pressure. Radiation of noise is calculated by a Kirchhoff-Helmholtz integral theorem.

강우시 침투영향을 고려한 사면안정해석

심태섭,기완서,김선학,최순범 朝鮮大學校 建設技術硏究所 2007 建設技術硏究 Vol.27 No.2

Most of current slope safety analyses consider only the effect of the rise of underground water level. However, because the infiltration of surface water into the ground is believed to have significant effects on slope stability, the present study performed slope safety analysis in case of the rise of underground water level, the infiltration of surface water, and both resulting from rainfall, and examined their effects. For this study, we selected Slope A and B, at which slope failure had happened due to rainfall, and made slope safety analysis in consideration of the fall of wetting front and the rise of underground water level resulting from rainfall. Based on the results of the analysis, we made comparative analysis on the relation between the effect of infiltration on rainfall and the stability of the slopes and proposed a desirable slope safety analysis method. The conclusions of this study are as follows. 1. In slope safety analysis in consideration of the effect of infiltration resulting from rainfall, the variation of safety factor was different depending on whether to consider the fall of wetting front, the rise of underground water level. or both. 2. The decrease of the slope safety factor caused by the fall of wetting front on rainfall was somewhat faster than that caused by the rise of underground water level. This suggests that slope failure caused by rainfall is affected more by the fall of wetting front than by the rise of underground water level. 3. When both the fall of wetting front and the rise of underground water level were considered at the same time, the slope safety factor decreased faster than when either the fall of wetting front or the rise of underground water level was considered. Accordingly, it is considered desirable to consider both the fall of wetting front and the rise of underground water level in slope safety analysis that takes into account the effect of infiltration resulting from rainfall.

연약지반에 시공된 보강토 옹벽의 거동해석에 관한 연구

심태섭,최순범,김선학 朝鮮大學校 建設技術硏究所 2007 建設技術硏究 Vol.27 No.1

It was found that the factor of behavior in the retaining wall of reinforced earth on poor subsoil was influenced by load increment, consolidation time and pore-water pressure. Finite element analysis was conducted by using SAGECRISP program for the behavior analysis of poor subsoil and the retaining wall of reinforced earth in this theory. Firstly, the validity of replacement method was examined for the improvement of excessive displacement of the retaining wall of reinforced earth. Secondly, the influence in the ground behavior of the vertical space of reinforced materials on the back of retaining wall was analyzed. Lastly, the width and the depth of appropriate replacement in appling replacement method were suggested. As the result of this study, following conclusion was got. Replacement method take effect on the behavior improvement of the retaining wall of reinforced earth because the case of replacement method(width: 8m, depth: 5m) in the retaining wall of reinforced earth on poor subsoil shows that improvement effect of vertical displacement is 2 ~ 3cm in the upper direction. 7.5 ~ 26.2cm in the lower direction, 11.6 ~ 26.4cm in the vertical displacement on the back of retaing wall and 7.1 ~ 8.6% in shearing strain. The improvement of horizontal displacement was not great because △h_(h)/H maintained similar value despite the increase of replacement width.

상악동거상술을 이용한 인공치아 이식 치험례

우순섭,장윤성,김태균,이영수,심광섭,유광희 한양대학교 의과대학 1999 한양의대 학술지 Vol.19 No.1

Recently many dentists would like to select the implant installation for the restoration of partially or fully edentulous patient. Usually, it is needed at least 8mm of alveolar bone height for implant installation. But, in many cases, the implant installation is impossible due to anatomic limitation such as maxillary sinus, floor of nose, mandibular canal, lack of width, etc. So, dentists must come over these limitations by methods of sinus lift, nerve repositioning, transmandibular implant etc. Especially, a lot of ridges have inadequate bone height at the upper molar edentulous areas, and to insert implant for such sites represents low success rate. So, autogenous or allogenic or alloplastic bone can be grafted before or at the same thme with implant installation. We report a case of 22 year-old woman who was performed implant installation successfully by using sinus lift technique with iliac block bone graft to a patient whose low alveolar bone height made common implantation impossible. Now, she exerts good occlusive function at the time of 15 months after the operation.

정밀어태치먼트의 완압정도에 따른 하악국소의치의 지지조직에 대한 3차원 유한요소 응력분석

정연진,우순섭,이영수,심광섭,유광희 한양대학교 의과대학 1999 한양의대 학술지 Vol.19 No.1

The purpose of this study was to evaluate the stress distribution developed in the supporting structures by mandibular distal extension removable partial dentures with 4 different precision attachments. The examined precision attachments were Mini SG attachment, CM box attachment. Mini Dalbo attachment, Technoroach attachment. Concentrated force(vertical force 200N, horizontal force 50N) was applied on the artificial 2nd molar of the removable partial dentures and distributed force(vertical force 100N, horizontal force 25N) was applied on the each artificial 1st, 2nd molars of removable partial dentures. Total 4 cases were compared and analyzed with 3-dimensional finite element method. And then, stress distribution patterns were analyzed and compared. The results were as follows. 1. In case of concentrated force; Maximal stress distribution was showed on the alveolus under artificial 2nd molar and then, stress mainly distributed on the residual alveolus of the denture base. 2. In case of distributed force; Maximal stress distribution was showed on the distal alveolar crest of distal abutment, and then, stress mainly distributed on the alveolus of mesial and distal abutments. 3. The stress of residual alveolus of non rigid attachment was greater than that of rigid attachment. 4. The stress of abutments of rigid attachment was greater than that of non rigid attachment.

치근단 병소의 임상적 연구

김상우,우순섭,유임학,이영수,심광섭 대한악안면성형재건외과학회 2001 Maxillofacial Plastic Reconstructive Surgery Vol.23 No.3

The purpose of this study was to find the clinical features of periapical lesions. A total of 130 periapical lesions which were obtained from biopsy and diagnosed histopathologically as periapical cyst, periapical abscess, and periapical granuloma at the Department of Dentistry in Hanyang University Hospital were throughly analysed according to the distribution and incidence of age, sex, location, and so on. The following results were obtained : 1.Out of 130 periapical lesions, 88 cases(67.7%) were periapical cysts, 30 cases(23.1%) were periapical abscesses, and 12 cases(9.2%) were periapical granulomas. 2.The periapical lesions occurred most frequently in the third decade, and followed by the fourth, fifth, sixth, and second decade. The periapical cysts occurred most frequently in the third decade(26.1%), the periapical granulomas in the fourth decade(33.3% ) the periapical abscesses in the sixth decade(26.7%). 3.The periapical lesions were more frequent in men than in women with the ratio of men to women of 1.4 : 1. The radio of men to women of periapical cysts was 1.6 : 1, that of periapical granulomas was 0.5 : 1, and that of periapical abscesses was 1.3 : 1. 4.The periapical lesions were more frequent in maxilla than in mandible with the ratio of 1.2 : 1. The ratio of maxilla to mandible of periapical cysts was 1.5 : 1, that of periapical granulomas was 0.5 : 1, that of periapical abscesses was 1 : 1. 5.The most commonly involved location of the periapical lesions was maxillary anterior teeth(40.8%), and followed by mandibular molars, mandibular premolars, and mandibular anterior teeth and maxillary molars. The most frequent location of the periapical cysts was maxillary anterior teeth(48.9%), that of periapical granulomas was mandibular molars(50.0%), that of periapical abscesses was mandibular molars(40.0%).

비완압형 어태치먼트의 위치에 따른 하악 가철성 국소위치의 지지조직에서의 저작압 분산 양태에 관한 3차원 유한요소적 연구

안원준,우순섭,이영수,심광섭,유광희 한양대학교 의과대학 1999 한양의대 학술지 Vol.19 No.1

The purpose of this study was to evaluate the stress patterns developed in supporting structures by removable partial denture with an extracoronal and an intracoronal rigid attachment. The mandibular removable partial dentures with Mini S-G (extracoronal) and C-M Box (intracoronal) attachment were constructed. Under 100N, 200N of vertical and 25N, 50N of lateral loads at the 1st and 2nd lower molar, stress distribution patterns and displacement were analyzed with three dimensional finite element method. The result were as follows: 1. There was no apparent difference in the patterns of stress distribution between rigid extracoronal and rigid intracironal attachments. 2. In case of the single abutment tooth with the rigid intracoronal attachment, it was not proper to preserve the abutment tooth. 3. With splinted abutments, the stress was distributed through all the root surface of both abutments. With single abutment, the stress was concentrated on the distal root surface of abutment. 4. With splinted abutments, there was not clear difference in the patterns of stress distribution with or without lingual bracing part. 5. In case of the single abutment tooth with the rigid intracoronal attachment and cantilever. More stress was concentrated around the abutment tooth with the lingual bracing part under loaded concentrated force and the abutment tooth without the lingual bracing part under loaded distributed force. 6. In case of the splinted abutments with the rigid extracoronal and intracoronal attachment, the denture base was displaced posteriorly and inferiorly when the force was applied. 7. In case of the single abutment tooth with the rigid intracoronal attachment, there was little displacement at the denture base.

측두하악장애 환자에서 과두크기와 관절융기의 후방경사에 관한연구

박원희,이영수,우순섭,심광섭 大韓顎顔面成形再建外科學會 2000 Maxillofacial Plastic Reconstructive Surgery Vol.22 No.1

The purpose of this study was to investigate the interrelationship between temporomandibular joint disorders, and the condyle size and angle of the posterior slope of the articular eminence. The subjects used in this study were 100 patients with temporomandibular joint disorders and 100 volunteers with normal temporomandibular joints. All the patients and the volunteers were subjected to take panoramic and temporomandibular radiographs for the morphologic evaluation. This films were traced, measured, and analyzed. The data were processed with SPSS/PC+package for statistical analysis. The obtained results were as follows : 1. The posterior slope of the articular eminence in the group of temporomandibular joint disorders was larger than that in the normal group (p<0.05). The mean articular eminence angle was 31.6。±6.3 in the group of temporomandibular joint disorder, and 29.9。±8.4 in the normal group. 2. There were no statistically significant differences in the discrepancies of the left and right articular eminence angular measurements between the group (p>0.05). 3. There were no statistically significant differences in the condylar ratio between the groups (p>0.05). 4. There were no statistically significant differences in the discrepancies of the left and right ramus length measurements between the groups (p>0.05). 5. The relative size of condyle to fossa in the group of temporomandibular disorders was smaller than that in the normal group(p<0.05).

산전초음파에서 발견된 기형의 계통별 진단 임신 주수의 차이

이병관,김선미,홍준석,심순섭,박중심,전종관,윤보현,신희철 대한산부인과초음파학회 2003 대한산부인과초음파학회지 Vol.5 No.2

위암과 식도암이 병발된 다발성 원발성 악성종양 1예

박사영,이나영,이효진,이선영,최진혁,이순남,심강섭,성순희,한운섭 梨花女子大學校 醫科大學 醫科學硏究所 1996 EMJ (Ewha medical journal) Vol.19 No.3

Multiple primary cancer means that more that two cancers occur independently in an individual. Recently, the incidence of multiple primary cancer has increased with lengthened survival, of cancer patients, development of new diagnostic technique and increased clinical evaluation. We report a patient who had adenocarcinoma of stomach combined with squamous cell carcinoma of esophagus simultaneously.