저작근 골막하 박리를 이용한 만성 재발성 탈구의 치험례

심재환,김기홍,문진석,민병진,이원학,홍광진 大韓顎顔面成形再建外科學會 2003 Maxillofacial Plastic Reconstructive Surgery Vol.25 No.3

Chronic recurrent dislocation(CRD) of the jaw has various etilogical causes, including trauma, congenital or acquired neurological illness, ingestion of certain medicines, incorrdination of the neuromuscular astivity of the chewing muscles, articular anatomical alteration, etc. Various surgical methods have been advocated for the treatment of the CRD. They may be divided into two groups: procedures designed to limit translation of the condyle and procedures eliminating obstacles in the condylar path. Hypomobility of mandible can be developed after BSSRO and it is probably caused by scar contracture, atrophy, and myofibrosis. Many authors, therefore, emphasized the importance of physical therapy especially after BSSRO to prevent the complication. Based on that idea, we designed more conservative surgical method to limit mandibular openning compared the methods that previously introduced and tried to treat the CRD. This new method consists of extensive subperiosteal dissection of masseter and the temporalis muscle under local anesthesia and use of intermaxillary elastics for some periods.

구름 베어링의 구름마찰 특성에 관한 연구

任宰煥,金敬模,鄭寅聖 全北大學校 1995 論文集 Vol.39 No.-

In this paper, contact behaviors and decrement characteristics of rolling bearing are studied between, rolling bearing and inner and outer race, obtained by increasing of ther bolted joint force. The experiment which consists of the FFT appartus, two bearing, pulley, shaft, etc. has been proposed for the estimation of the friction force and the logarithmic decrement for various bearings. The beaarings of rolling used in this experiment are 6205 ball, 6207 ball, cylindrical roller, tapered roller bearing. The results demonstrate that the force and the logarithmic decrement of the rolling bearing increase with the type of cylindrical roller, tapered roller, 6207 ball, 6205 ball bearing in order.

都市間交通에 있어서의 短距離 離着機에 對한 硏究

金載歡 한국항공대학교 1981 論文集 Vol.18 No.-

近年의 航空運送의 伸張은 눈부신것이며 增大하는 需要에 答하듯 연이은 Jumbo機의 導入과 空港施設의 擴張이 이루어졌다. 그러나 이것은 一部 主要 空港에 極限되며 幹線을 除外한 支線의 경우는 오히려 收容의 限界가 極限되어 退步一路에 있는 實情이다. 旣存의 작은 空港을 利用할수 있고 中近距離 輸送에 適格인 STOL機는 將次 航空輸送에 큰 比重을 차지할 것임에 輸送 system으로서의 STOL 機에 對하여 system 全般의 問題點과 機體의 技術的 問題 및 航空保安無線裝備의 改良方案에 對하여 硏究한 것이다. Recent expansion made in the air transportation has proven to be remarkable and in response to its ever-increasing demand Jumbo airliners have been introduced with airport facilities improved and enlarged. Yet the current situation is that such development seems to be limited entirely to the principal airports of the main lines, whereas the local lines appear to be deteriorating due to their insufficient overladen capacity. Taking it into consideration that STOL airplanes which, being applicable to middle-short-distance transportation, may utilize comparatively small-scale facilties of the existing airports and thus would play an important role in the prospective air transportation, this study is intended to deal with the over-all efficiency of STOL airplanes as a transportation system including general problems concerning technical know-how which would create the improvement of navigational aids for air security.

통일 후 국토개발을 위한 남북한 토지관련제도에 관한 연구

서주환,김상범,윤재남 경희대학교 부설 디자인연구원 1998 예술· 디자인학연구 Vol.1 No.1

This study is to propose a proposal that it is supposed to rise an issue of land panning in unification of north and South Korea. Lately North Korea extract all possible efforts to pen a country to foreign intercourse. Therefore, there is a growing need for concrete study of various issues about unification of north and South Korea. The results of this study are as below; After unification of north and South Korea. It is supposed to various issues that are relate to land (a labor question. the housing shortage, the movement of population) so that the government and private business preferentially have to invest in land planning.

정신감정이 의뢰된 殺人被疑者의 MMPI

장재국,김영환 大韓神經精神醫學會 1985 신경정신의학 Vol.24 No.3

본 연구는 1983년 3월부터 1984년 12월 사이에 경북의대 신경정신과에 살인피의자로 정신감정이 의뢰되었던 50명의 피감정자에 대한 MMPI 반응을 검토하였다. 검사의 실시는 교도관의 입회하에 개별적으로 실시하였고, 이 피감정자의 MMPI를 선행된 정신분열증 및 역할위조집단의 MMPI와 비교하였다. 그리고 피감정자를 최종 임상진단에 따라 정신병집단과 비정신병집단으로 구분하고 각 프로파일의 특징을 검토하였다. 그 결과를 요약하면 다음과 같다. 정신감정이 의뢰된 살인피의자의 MMPI 프로파일은 신경증척도와 정신병척도 모두에서 높게 나타나고 있고, 이 프로파일은 선행된 연구들의 정신분열증의 프로파일보다 높고 역할위조집단의 프로파일 보다는 낮았다. 평균 F척도의 소점은 24.8로서 임상척도와 타당성을 인정하기 어렵다. 정신감정이 의뢰된 살인피의자를 최종 임상진단에 따라 정신병집단과 비정신병집단으로 분류했을 때, 두 집단의 MMPI 프로파일은 형태 및 수준이 유사했다. 즉 두 집단이 모두 신경증척도와 정신병척도가 높았고 선행된 정신분열증의 프로파일보다 높았다. 그러므로 살인피의자로 정신감정이 의뢰된 경우에 있어서, MMPI는 정서장애내에서 뿐만 아니라 정서장애와 정상간에 어떤 진단적 변별력을 부여하기 어렵다. 따라서 심리검사에 대한 적절한 동기가 결여되어 있을 경우에는 MMPI와 같이 주관적 자기보고에 의존하는 검사는 그 타당성을 인정하기 어렵다고 하겠다. The authors studied MMPI resposes of 50 suspected murderers who had been referred to the psychiatrists from the court of Taegu area for the period of March 1983 to December 1984, to determine criminal responsibility. The MMPI was administered individually in the presence of a watchman. The MMPI profile of the suspected murderers was compared with that of induced patients’ rolefaking group of previous study and that of the schizophrenic group of another study. Secondly, the suspected murderes of the present study were divided into two groups(psychotic and nonpsychotic) and MMPI profile of of both groups were compared. The results were as follows; The MMPI profile of the suspected murderers showed extremely elevated pattern in terms of neurotic triad as well as in psychotic tetrad and was higher in its scores than the profile of schizophrenic group, but was lower than that of role faking group. The mean F scale score of MMPI of the suspected murderers was extremely high (raw, 24.8) which could be interpreted as lack of clinical validity. In the comparison of psychotic and nonpsychotic group of the suspected murderers, there was no different patterns and the patterns of both groups were more elevated in terms of neurotic triad and psychotic tetrad than those of schizophrenic comparison group. From the above results, the authors think the MMPI of suspected murderers was not effectively instrumental in determining mental illness from normal group. In conclusion, the lack of genuine motivation in psychological testing such as MMPI which heavily depends on subjective and selfreporting procedure results in lack of clinical validity.

효소 처리에 의한 섬유벽 변화의 정량적 연구

김재옥,김철환,박종열,양재경 경상대학교 농업생명과학연구원 2002 농업생명과학연구 Vol.36 No.4

지료 조성 공정의 리파이닝 처리 동안에 펄프 섬유에 가해지는 섬유 손상을 방지하기 위하여 효소 리파이닝을 실시하였다. 펄프 섬유에 대한 효소 처리 효과를 정량적으로 측정하고자 효소 처리된 펄프섬유를 공초점레이저현미경(CLSM)을 통하여 물에 팽윤된 섬유의 횡단면 영상을 얻은 후 내부 피브릴화 현상을 화상분석법을 통하여 정량적으로 정하였다. 셀룰라아제 효소가 처리된 섬유는 단섬유 발생, 미세분 형성 등과 같은 기계적 손상이 없이 섬유벽의 팽윤이 세포 내강(lumen)을 향하여 일어나는 것을 확인할 수 있었다. 결론적으로 CLSM과 화상분석을 통하여 효소를 이용한 펄프 섬유의 생물학적 처리는 리파이닝과 같은 기계적 처리를 대체함으로써 제지 공정의 개선과 종이 물성의 향상에 상당히 기여할 수 있음이 입증되었다. This study was carried out for determinating the behavior of enzyme toward internal structure of pulp fibers quantitatively. A commercial enzyme, cellulase, was treated to the radiata pine ECF pulp in New Zealand Differently from the previous studies, the visual observation by Confocal Laser Scanning Microscope(CLSM) and the measurement of cross-sectional dimension of pulp fibers in a wet state by image analysis were made. Through the image analysis, it became evident that fiber wall swelling after cellulase treatment on pulp fibers occurred toward fiber lumen. In addition, it was clearly seen that the increase in physical properties of paper was closely related to internal fibrillation by the cellulase. The pulp fibers treated by the enzymatic treatment could avoid mechanical damages like fiber shortening and fines formation. Thus it was proved that the biological treatment by enzyme on pulp fibers generated internal fibrillation of pulp fibers.

진동대 모형 실험과 3차원 수치해석을 통한 농업용 저수지의 내진안정성 분석

송창섭, 김명환, 우제근 忠北大學校 農業科學硏究所 2017 農業科學硏究 Vol.33 No.1

The object of this paper was to determine seismic safety of agricultural reservoir. This study was carried out to analysis for the displacement characteristic and seismic acceleration characteristic. This study compare and evaluated the results of shaking table tests and 3-D Numerical analysis. As a result of the shaking table test, acceleration increased 10% after the installation in the short period seismic wave toward the center of levee, The maximum displacement was 11.98 mm in long - term seismic wave, and the permissible shipment variation was corrected to be less than 1% and 220 mm in ‘Assessment and improvement of seismic performance of existing dam’. As a result of 3-D Numerical analysis by combined load of railway vibration load and ground acceleration, the acceleration increased by maximum 2.97 times from bedrock acceleration 0.154 g in short period and long period seismic wave, The displacement was found to be 79.6 mm above the bank in the long - term seismic wave after construction, and the permanent displacement was 11.5 mm in the railway. 3-D Numerical analysis results showed ‘Assessment and improvement of seismic performance of existing dam’ as well as shaking table model test. Further research is needed on the combined action of railway and seismic loads for the seismic stability of agricultural reservoirs.

치아 마모 환자에서 수직고경 증가를 동반하여 단일구조 지르코니아 보철물로 완전구강회복을 시행한 증례

오경철,정문규,김지환,심준성 大韓齒科補綴學會 2012 대한치과보철학회지 Vol.50 No.3

과도한 치아 마모는 교합면에 손상을 야기하고, 치수 병변, 교합 부조화, 기능장애, 심미적 문제 등을 야기할 수 있다. 과도한 치아 마모를 갖고 있는 환자들을 치료하고자 할 때 수직교합고경(vertical dimension of occlusion, VDO)의 상실 여부와 수복을 위한 악간 공간의 적절성 여부에 기반하여 분류를 할 필요가 있다. 본 증례의 환자는 다수 치아들의 마모를 지닌 50세의 남성으로, 과도한 치아 마모가 있지만 수직교합고경의 상실은 없으며 수복을 위한 악간 공간이 부족하였다. 이러한 경우 수직교합고경을 증가시켜 치료를 진행하는 것을 고려할 수 있다. 수직교합고경의 증가를 필요한 범위 내에서 최소로 줄이고, 증가된 수직교합고경 상에서 안정화 기간을 거친 뒤 안정된 교합 접촉을 제공할 수 있다면, 수직고경 증가를 동반한 치료법은 안정성을 가질 수 있다. 본 남성 환자를 치료하기 위해 수직고경의 증가를 동반하여 전치부와 구치부에서 단일 구조 지르코니아를 이용한 고정성 보철물로 수복을 하였다. 일련의 치료과정을 통하여 기능적인 면과 심미적인 면에서 만족스러운 결과를 얻었기에 보고하는 바이다. Excessive occlusal wear results in unacceptable damage to the occluding surfaces, and can cause pulpal injury, occlusal disharmony, impaired function, and aesthetic deformity. Patients with severely worn dentition need to be classified as several categories relative to the vertical dimension of occlusion (VDO) and the interocclusal distance for the prosthetic space. When treating patients classified as those who have excessive wear without loss of occlusal vertical dimension but with limited space, we could consider treating them at an increased vertical dimension of occlusion. Treatments at an increased vertical dimension of occlusion may provide stability, given that the amount of its increase was minimal, and a perfected occlusion was achieved after enough stabilization period. A 50-year-old male visited the department of Prosthodontics in Yonsei University Dental Hospital with the chief complaint of worn teeth on lower anterior area. Reconstruction at an increased vertical dimension of occlusion was planned. After the compatibility of the new vertical dimension of occlusion had been confirmed under interim fixed restorations, definitive fixed restorations composed of full-contour monolithic zirconia prostheses were placed. This case presents that a satisfactory clinical result was achieved by restoring the worn dentition at an increased vertical dimension of occlusion with an improvement in esthetics and function.

국내 발전소별 바텀애시를 잔골재 대체재로 사용한 모르터의 특성에 대한 실험적 연구

송민섭,장재봉,조봉석,김재환,김용로,김무한 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1(구조계)

With the advance in industrial development and modern living comfort, the demand for electricity throughout the country is ever increasing. Also the annual consumption of coal by coal-fired power plants is increasing. The amount of ash produced in 2000 is estimated to be about 4.5 million tons. The disposal of this huge amount of ash introduces serious environmental problems. Fly ash among the ash produced is used in building industries as a substitute to cement in concrete and the concrete thus produced is said to be lighter and stronger. But bottom ash among the ash produced is not used because of its poor properties. But encouraging the use of bottom ash as a construction material is a sensible method of utilization as it avoids the problems and costs associated with disposal and provides an alternative aggregate source. This study is aimed at using bottom ash as an alternative fine aggregate source to provide a solution to disposal and insufficient fine aggregate for the production of concrete. So properties of bottom ash produced in power plants were estimated due to the difference of bottom ash produced in each plant. And mortar strength was estimated as basic data to use bottom ash in building industries.

PCR을 이용한 국내 및 수입 축산물 유래 Listeria monocytogenes의 유전학적 분석연구

우용구,이수화,이철현,최정수,류재두,김영일,이오수,김봉환 한국수의공중보건학회 2003 예방수의학회지 Vol.27 No.2

One hundred-fifty two of Listeria strains were isolated from domestic chicken carcasses, a slaughter-houses from nationwide from 1996 to 1997 and imported livestock products from a ten foreign countries including the USA, China, France and Thailand. To substitute the laborious and time consuming procedures of clinical laboratory standard diagnostic methods, the rapid and specific multiplex PCR(M-PCR), which was designed to amplify a three kinds of genes simultaneously f3r specific detection and differentiation of L. monocytogenes(LM) by one step procedure, was established. The LM strains confirmed with M-PCR were analysed to their genetic diversities by RAPD using the two primers(D87 & MMTl), and also evaluated on their discriminatory abilities(na) between two primers. our study also conducted the REP-PCR and ERIC-PCR for evaluation of the possibility of REP and ERIC elements for genetic subtyping of LM strains. According to the REP-PCR and ERIC-PCR fingerprinting patterns, LM strains were divided into 7(ERIC-type) and 4(REP-type) major clusters at the relative clone cut off value of 80%. According to the computer analysis of PCR results using the GelCompar Ⅱ software, ERIC-PCR(DI=0.955) had expressed the most high discriminatory ability and followed by REP-PCR(DI=0.952), RAPD(D87; 0.954, MMT1; 0.937), in order. The combined analysis of the present PCR results was also expressed the reliable and useful discriminatory ability(DI=0.916). This study suggested that PCR based methods could be used as an reliable, reproducible, rapid, and highly discriminatory method for the genetic differentiation of genus Listeria.