세균성 점무늬병균에 感染된 콩잎 葉肉 組織의 形態學的인 變化

류경열,허훈,김용기 충북대학교 농업과학기술연구소 1995 農業科學硏究 Vol.12 No.2

A comparison was made of the in vitro activities of earlier quinolone antibacterials and some antibiotics used in aquaculture in Korea and newer quinolones, aganist selected flesh bacterial pathogens. Most quinolones were shown high sensitivity against all Gram- negative strains. Some Gram- negative strains, however, showed a resistance to the earlier quinolones and antibiotics. Bacteriostatic and bactricidal effects of the newer quinolones on Gram- negative strains were higher than those of the earlier quinolones. Among the newer quinolones, norfloxacin and pefloxacin showed a great reduction of the number and rate of mortality, and confirmed that their therapeutic effects were very excellent. Norfloxacin and pefloxacin were also recognized to be a wide spectrum of antibacterial quinolones, and their application was expected to be effective for the treatment of many fish bacteriaal diaseases, difficult to treat with existing antibiotics. The newer quinolones were considerd to have the potential for the treatment of Gram- negative, and possibly Gram- positive, bacterial fish pathogens.

보이드 생성기구에 의한 복합조직강의 연성 파괴거동에 관한 연구

吳澤烈,崔明振,楡龍錫,金松正 慶熙大學校 材料科學技術硏究所 1993 材料科學技術硏究論集 Vol.6 No.-

Ductile Fracture of Dual Pase Steel begins with void nucleation, at Martensite-Ferrite interface or deformed Martensite particle. In this study void nucleation, void growth, void volume fraction and void coalescence at given strain were studied in dual phase steel. Therefore, by means of the heat treatment of low corbon steel the study deal with void nucleation and void growth for ferrite grain sizeof dual phase steel. Void nucleaton and void growth with increasing strain are shown depend upon the ferrit grain size. The number of voids and volume fraction of voids generary increase as ferrite grain size decrease. At the close to fracture the void coalescence in the direction of the applied tensile stress, but near the fracture surface they linked in direction transverse to the tensile axis.

우리나라 항공기 소재부품 공인시험 체제구축 방안에 관한 연구

이상율,이용택 한국항공대학교 1996 論文集 Vol.34 No.-

항공기산업은 기술집약형 종합기술산업으로 항공기 관련 제품은 고도의 안전성이 요구되며, 모든 항공기는 품질 면에서 균일성과 신뢰성이 보장되어야 한다. 항공기 부품은 국제적 공인성이 부여될 때에만 상품으로서 가치를 인정받을 수가 있기 때문에 품질인증 보다 강조되어지는 분야라 할 수 있다. 현재, 우리나라에서는 헬기사업, KFP사업 및 중형항공기 개발사업 등 대형사업 등이 추진 되고 있으며, 절충교역(Offset Program)에 의하여 일정 양의 국산 항공기 부품을 외국에서 수입하도록 계약이 되어 있다. 그러나 국내에서는 항공기 소재부품에 대해서 공인시험평가를 할 수 있는 인력·기술·설비를 갖춘 업체가 부족한 실정이고 품질평가 및 보증 체계가 미흡하여 수출에 어려움을 겪고 있다. 따라서 본 논문에서는 국내에서 수행되고 있는 항공기관련 소재 및 부품의 공인시험의 범위와 현황을 살펴보고 국내 항공기 소재부품의 공인 시험의 발전방향을 제시하고자 한다. Aircraft industries are complex technology-oriented industries, which require high level of safety and comprehensive assurance on the quality control as well as reliability. As parts for aircraft must have international certification of their quality and reliability in order to be put on the market, quality assurance cannot be over emphasized. Large national projects such as KFP program, Helicopter program, mid-range aircraft program are currently being proceeded in Korea and certain amount of domestically manufactured parts for aircraft ought to be purchased by foreign aircraft manufacturer through the "Offset Program". However due to the lack or shortage of the personnel, technology, and facilities in the areas of the internationally approved quality inspection and evaluation program, the offset program is not going very well. Therefore in this paper the current status of quality inspection system on materials used in aircraft parts in Korea is reviewed and the suggestions for the development of systematic quality assurance and inspection program are made.

치아의 맹출장애

임용규,이동렬 대한치과교정학회 2000 대한치과교정학회지 Vol.30 No.1

치아의 맹출장애에 관한 연구들은 많은 경우 치아의 유착이나 물리적인 장애에 의한 영구치의 맹출지연, 매복 등을 다루어 왔다. 그러나 치아의 맹출장애는 단순히 국소적이며 물리적인 현상일 수도 있지만 전신적 발육이상의 발현일 가능성도 높음을 간과해서는 안 된다. 이는 중요한 전신질환의 일부 현상으로 나타나는 경우가 많으며 맹출기전 자체에 이상이 있는 경우도 있다. 특히 영구치의 맹출장애는 치열 및 악골의 발육에 영향을 미치고 치주조직의 손상을 야기하며 기능장애 및 심미적인 문제를 가져올 수 있다. 그러므로 정상적인 치아의 맹출은 악안면의 성장과 발육, 기능에 중요하다고 할 수 있다. 따라서 교정임상의로서 우리는 치아의 맹출에 이상이 있는 환자를 조기에 진단, 발견하여 그 원인을 밝히고 이에 따라 적절히 대처할 수 있는 능력을 가져야 할 것이다. 본 연구에서는 치아의 맹출장애를 일으키는 원인요소 및 이에 따른 치료방법의 차이에 대해 알아보고 그 중 골형성 부전증 및 primary failure of eruption환자를 예로 들었다. The purpose of this study was to present the causes and their mechanisms of eruption failure of teeth and to investigate the treatment modalities. There are so many reports about eruption failure, but most of them are dealing with local mechanical interferences. But, we have patients suffered from eruption failure of another causes. Many developmental failures show eruption problems of teeth, although in some cases, the primary failure of eruption (failure of the eruption mechanism itself) can be the primary cause. We have to know about the causes, differences, and the treatment modalities for those abnormalities.

광중합형 레진으로 아말감 면에 브라켓 접착 시 전단결합 강도

임용규,조지영,이동렬 대한치과교정학회 발행 2005 대한치과교정학회지 Vol.35 No.6

본 연구는 아말감 면에 광중합형 레진으로 교정용 브라켓을 접착시킬 경우, 광원의 차이(할로겐 광중합기와 light-emitting diode (LED) 광중합기)와 샌드블라스팅 표면처리 여부에 따른 접착제의 전단결합강도를 비교하고자 시행되었다. 발거된 소구치 30개를 대조군으로 이용하였으며, 법랑질 표면을 산부식한 후 통상적인 방법으로 브라켓을 접착하였다. 60개의 다른 소구치에 아말감 충전을 하여 실험군으로 이용하였다. 두 군에서 할로겐 광중합기와 LED 광중합기를 이용하여 브라켓을 접착시키고 브라켓이 탈락될 때까지 힘을 가해 전단결합강도를 측정하였다. 실험 결과, 실험군의 전단결합강도는 약 3-5.5 MPa로 대조군(19MPa)보다 낮았다. 실험군에서 샌드블라스팅 표면처리를 한 경우, 할로겐 광중합기를 사용한 군이 LED 광중합기를 사용한 군보다 높은 전단결합강도를 보였으나 (p<0.05), 샌드블라스팅 표면처리를 하지 않은 경우에는 광원에 따라 전단결합강도에 차이를 보이지 않았다. (p>0.05). 할로겐 광중합 군과 LED 광중합 군 모두에서 샌드블라스팅 여부에 따른 전단결합강도에 통계적으로 유의한 차이가 없었다 (p>0.05). 아말감 면에 광중합형 레진을 이용하여 브라켓을 접착할 경우, 할로겐 광중합기와 LED 광중합기로 얻을 수 있는 접착제의 결합강도는 임상적으로 사용하기에는 낮게 나타나, 이의 증진 방법을 도모하기 위해 앞으로 더 많은 연구가 필요하리라 사료된다. This study was performed to compare the shear bond strength of orthodontic adhesive to amalgam according to different light sources (halogen-based light and light emitting diode (LED)) and amalgam surface treatments. Ninety extracted human premolars were randomly divided into 6 groups (4 experimental and 2 control groups) of 15 by light sources and surface treatments. Orthodontic brackets were bonded and shear bond strength was measured with an Instron universal testing machine. The findings were as follows: The bond strength of adhesive to amalgam surface was 3-5.5 MPa which was lower than that of acid-etched enamel (19 MPa) control. In the sandblasted amalgam surface, the shear bond strength of the halogen light group was higher than that of the LED group (p<0.05) but, in the non-treated amalgam surface, there was no significant difference in the shear bond strength according to the light sources (p>0.05). Within the same light source. sandblasting had no significant effect on the shear bond strength of the adhesive bonded to amalgam surface (p>0.05). there was no significant difference in shear bond strength according to the light sources in acid-etched enamel control groups. This results suggerst that there can be a limit in using light curing adhesives when brackets are bonded to an amalgam surface. Additional clinical studies are necessary before routine use of halogen light and LED light curing units can be recommended in bonding brackets to an amalgam surface.

태권도 선수의 기질(temperament) 특성에 관한 연구 : 고등학교, 대학교 남, 녀 태권도선수를 중심으로

최영렬,김용길 慶熙大學校 社會體育硏究所 1998 體育科學論叢 Vol.- No.11

The purposes of this study were to analyze the temperament characteristics of Taekwondo players and to give a good advise in relation to game performance and management of athleths and team administration for Taekwondo instructors. Subjects of this study were randomly selected. The sample consisted of 200 male and female high school and collegiate Taewkondo players. The temperament characteristics were assessed by means of a questionnair developed by Igen(1983). The questionnair which consisted of 59 questions include 3 sub-factors such as sincerity(24),introvert and extrovert(24), and neurosis(9). The results of this study showed that there was significant difference(p<0.01) for neurosis between male high school(14.48) and male collegiate(12.14) Taekwondo players. However, no significant difference could be oberved for all temperament characteristics between male and female high school Taekwondo players, between male and female collegiate Taekwondo players. This study suggests that male Taekwondo players were less for neurosis than female Taekwondo players

Thermal MOCVD와 DC pulsed PA-MOCVD에 의해 증착된 TiN 박막 연구

박용균,이영섭,이태수,이성재,조동율,천희곤 울산대학교 2001 공학연구논문집 Vol.32 No.1

유기화합물(TDEAT;Ti[N(C2H5)2]4)과 NH3를 이용하여 thermal MOCVD와 dc pulsed plasma assisted MOCVD(PA-MOCVD)인 2종류의 TiN박막을 증착하여 비교하였다. TiN박막의 특성분석은 XRD, AES, FE-SEM, α-step과 XPS로 연구하였다. DC pulsed plasma assisted MOCVD로 증착된 Tin박막은 ion bombardment 효과에 의해 열적으로 증착된 것보다 더 fine한 columnar구조를 나타내므로써 막의 결정질이 향상되었다. 플라즈마에서의 아르곤 이온의 충돌로 인해 탄소(C)는 오히려 유기 화합물보다 탄소 라디칼로 존재하였다. 따라서 탄소 라디갈은 기판의 강한 (-) potential에 의해 TiN박막에 trap되기 때문에 탄소(C)는 열적으로 증착된 TiN박막보다 더 많은 양이 존재하는 것으로 추정된다. By using of (TDEAT;Ti[N(C2H5)2]4)and ammonia gas source, we deposited two different TiN thin films with thermal MOCVD and dc pulsed plasma assisted MOCVD (PA-MOCVB). The properties of TiN thin films were studied by XRD, AES, FE - SEM, α - step and XPS analyses in this work. The TiN films deposited by dc pulsed PA - MOCVD have a little higher density and a fine columnar structure, compared with thermally deposited TiN thin films. This may be due to ion bombardment effect resulting in improved crystallinity in films. Carbon in the film may exist in the form of carbonic radical rather than organic compound because of collision with Ar ion in the plasma. Consequently, the content of carbon in the film of dc pulsed PA - MOCVD was higher than that in thermally deposited TiN films, because carbon radicals could be trapped in the film by strong negative potential of the substrate.

초고속망을 이용한 멀티미디어기반 종합 한방 원격 의료정보 시범시스템 구축

이용주,양옥렬 圓光大學校大學院 2000 論文集 Vol.24 No.-

한의학의 원격검진 및 한방의학 정보는 전통의학의 표준화 및 과학적 접근을 위해 전통한의학 정보 컨텐츠를 데이터베이스화하고 원격지에서의 한의진료가 가능하도록 하는 원격진료 통합 시스템을 개발함으로써 초고속통신망의 유용한 서비스를 제공하게 된다. 본 연구는 국민 대다수가 보편화된 한방 의료 서비스를 제공받을 수 있게 하는데 그 목적이 있으며 정형화된 데이터베이스를 통해 점차적인 한의학정보의 통합관리가 가능할 수 있도록 하였다. 또한 방대한 멀티미디어 정보를 효율적으로 검색할 수 있도록 하기 위해 시소러스를 통해 데이터베이스 정보의 균형잡인 서비스가 가능하도록 하는 질의 처리 시스템을 갖춘 멀티미디어기반 데이터베이스를 구축하였다. The goal of this research is to develop a Remote Medical Examination System on Oriental Medicine on the very high speed information communication network. We developed a remote medical examination system based on the sample examination data of 10 patients and develop the information of search database based on contents. We analyzed the sample data and the requirements of patients, doctors, and nurses. By the analyzed result, we designed and constructed a prototype are as follow : the multimedia ORDBMS server system, network interface technology, internal/external database schema design, oriental medicine expert knowledge base design, inter-data search algorithm design and thesaurus.

성모병원에서의 정신과 자문 현황

권용실,유태열,한진희 大韓神經精神醫學會 1991 신경정신의학 Vol.30 No.4

To obtain relevant data on current trends of psychiatric consultation in a general hospital, the authors reviewed 194 cases of inpatients who were referred for psychiatric consultation from January 1. 1989 to December 31. 1989 at the St. Mary's Hospital. The results were as follows : 1) The overall consultation rate was 1.4% of all inpatients, and age distribution was heavily concentrated at the age of 30's and 50's. 2) A majority of referrals came from the department of internal medicine(48%) and from the department of neurosurgery(16.5%). 3) The most common reason of psychiatric consultation were to evaluate physical symptoms with no laboratory abnormalities(26.8%), while the most frequent symptoms of the referred patients were those related to head and central nervous system(20.6%). 4) The rate of psychotropic drugs use prior to psychiatric consultation was 44.3% and the most frequently prescribed ones were antianxiety drugs(56.2%). 5) Depressive disorders(22.6%) and organic mental disorders(20.6%) were the most common diagnoses given after psychiatric consultation. 6) Use of psychotropic drugs was the most frequent recommendations given after psychiatric consultation.

펜타조신 의존 환자의 임상양상 및 치료

朴容漢,金光數,柳太烈 한국의학사 1990 診斷과治療 Vol.10 No.9