표층확대형 조기위암 1예

고성만,김기훈,서호종,서광섭,유광렬,채선애,임병욱,김홍자,김호정,김진승,허병원,김해경 중앙대학교 의과대학 의과학연구소 2001 中央醫大誌 Vol.26 No.3

The superficial spreading type of early gastric cancer has usually been defined as an early gastric cancer in which the product of the longest diameter and the diameter perpendicular to it was greater than 25㎠. Although the superficial spreading type of early gastric cancer is histologically aggressive compared with those without such histological aggressiveness, the 5 year survival rate is as good as a non-superficial spreading types of early gastric cancers if the wide surgical resection with extensive lymph node dissection is performed as a treatment. We experienced a case of superficial spreading early gastric cancer in a 59-year-old man. This case is reported with a brief review of related literature.

급성 심근경색증에 동반된 승모판 폐쇄부전증의 임상적 특징

정상만,조영일,조화상,유광하,송기호,인행환 건국대학교 의과학연구소 1997 건국의과학학술지 Vol.- No.7

통합 망관리 시스템 지원을 위한 Managed Object Definition에 관한 연구

김종만,김태수,이광휘 창원대학교 정보통신연구소 2001 精報通信論文集 Vol.5 No.-

This paper presents a system for internetworking between different network management protocols. The internetworking system between SNMP and CMIP has been designed. SNMP has been used as a standard protocol in Internet while CMIP in OSI network. It is not easy to interoperate SNMP and CMIP because these protocols have several different aspects. So, definition method of integrated managed object to support several different domain managers in the grammar level has been proposed in this paper. In this paper, we propose technique to make new template, "macro" template. This template can include SNMP notation with minimum reformation. The package template is also extended and added for additional rules for SNMP domains. Through this approach, benefits of serving different services can be provided to several domain managers by modifying interfaces.

페이스트 오펙 제조에 관한 연구 : Ⅱ. 페이스트 오펙 포세린의 금속과의 결합강도 비교 Ⅱ. Comparison on the Bond Strength of Paste Opaque Porcelain to Metal

고제만,고대진,김사학,김광만 大韓齒科器材學會 2002 대한치과재료학회지 Vol.29 No.2

Metal-ceramic system has been widely using for aesthetic dental prosthesis. Opaque porcelain is used fore the masking of the metallic color of coping and the enhancing of the bond strength between metal and porcelain for PFM system. Paste opaque is a new type of opaque porcelain to easily apply onto metal coping and to get uniform thickness and good bonding characteristics to metal. The paste opaque was prepared by mixing of powder opaque with organic substances for this study. Three kinds of paste opaque which are in market were selected to compare the particle size distribution and bond strength with the paste opaque prepared in this study. The particle size distributions of all paste opaques were measured by particle size analyser, and the bond strengths were examined by using universal testing machine. This study shows that the maximum size of all samples is under 50㎛ and Ceramco has the finest mean particle size. The bond strength of the prepared paste opaque is about 35 MPa, and it is satisfied with ISO standard(25MPa).

외상환자의 중증도분류를 위한 Triage Score와 Triage-Revised Trauma Score의 비교

조광원,황성연,배성만 대한응급의학회 2001 대한응급의학회지 Vol.12 No.3

Background: The triage-revised trauma score(t-RTS) is used for triage in trauma patients in many countries. Recently, the triage score was developed as a new triage method for trauma patients in Korea. The objective of this study was to assess the accuracy of triage for the t-RTS and the triage score. Methods: The medical records of 1575 consecutive trauma patients visiting the Emergency Center, Masan Samsung Hospital, from March to August 1999 were retrospectively analyzed. The triage score and the t-RTS were taken from the charts completed by the emrgency room doctors and nurses. The accuracies of the two triage methods were compared by using the undertriage and the overtriage rates, receiver operating characteristic(ROC) curve analysis, and a correlation analysis with many physiologic, anatomical, biochemical, and mixed scores(Glasgow coma scale, injury severity score, TRISS, APACHE II and III scores, operation, survival, etc.). Results: The undertriage rates for the triage score and the t-RTS were 22.8% and 38.2%, respectively(p≤0.001), the overtriage rates were 6.3% and 3.1%, respectively,(p≤0.001), and the accurate triage rates were 91.3% and 91.7%, respectively. The areas under ROC curves for the triage score and the t-RTS were 0.871±0.033 and 0.800±0.039, respectively(95% confidence interval, p<0.001). In general, the correlations of the two triage methods with many physiologic, anatomical, biochemical, and mixed scores were moderately high, but there were no statistical differences between the correlation coefficients of the two triage methods for those scores. Conclusion: The triage score was equal or superior to the t-RTS for triage in trauma patients. The former was simpler and could be used easily by emergency medical personnel. Therefore, the authors conclude that the triage score can be used instead of the t-RTS for triage in trauma patients.

CVD 다이아몬드 박막의 열전도 특성

이광만,고정대,최치규 제주대학교 산업기술연구소 2001 尖端技術硏究所論文集 Vol.12 No.1

Diamond has outstanding thermal properties that make it the material of choice for heat spreading applications in microelectronic devices. In order to asses thermal properties of diamond films grown by microwave plasma CVD method, we have applied an ac thermal conductivity measurement technique where films are thermally excited at frequency w while the thermal response is measured at the third harmonic via a lock-in amplifier. This method is insensitive to errors due thermal noise. Before the application to diamond, the measurement technique was tested on fused silica and sapphire. The results were in good agreement with published values. The thermal conductivity of CVD diamond films were measured to be around 3 W/cm·K.

실리콘 미세가공 기술을 이용한 마이크로 진공 센서

이광만,고성택,김영민,고희선 濟州大學校 産業技術硏究所 1998 산업기술연구소논문집 Vol.9 No.1

A micro-vacuum sensor has been fabricated by using silicon micromachining techniques and platinum thin film. NON insulator was deposited by LPCVD and APCVD methods. The insulator diaphragm was fabricated by silicon anisotropic etching in TMAH solution. Thin film platinum heater and temperature detector were deposited by rf sputtering method and patterning was performed by means of lift-off method. Deposited platinum heater and temperature detector have been shown a linear I-V characteristics. TCR( temperature coefficient of resistance) of thin film platinum heater and temperature detector was about 0.0042/℃. Fabricated vacuum sensor was measured in the range of 1X 10^(-3) Torr to 1X10^(2) Torr. and shows a good linear operating characteristics in the range of 1x1^(-2) Torr에서 1X10^(0) Torr.

부산지역 일부 종합병원의 컴퓨터 단말기 작업을 하는 여성 원무업무종사자들에 있어서 누적외상성장애에 대한 조사

전만중,유병철,고광욱,이용환 고신대학교의과대학 2007 고신대학교 의과대학 학술지 Vol.22 No.2

registration system were organized, computerized, and simplified. Especially the workers for the hospital registration desk were almost used computer all the working time. Therefore we assessed cumulative trauma disorder of registration desk workers related to computer use of general hospital. Methods: 62 women computer users who worked for registration desk of general hospitals in Busan were assessed from March to August, 2007. The workers were checked general characteristics(age, educational level, and marital status), work related characteristics, and symptoms by self-administered questionnaires. Results: Significantly decreased prevalences for cumulative trauma disorder were observed for subjects who had more educational level, the prevalence of cumulative trauma disorder was 69.2% among high school graduates, 38.2% among junior college graduates, and 20.0% among college graduates. Significantly increased prevalences for cumulative trauma disorder were observed for subjects who had more duration of computer use, the prevalence of cumulative trauma disorder was 56.5% for those who had used computer for more than 8 hours, 32.1% for those who had used computer for 4-7 hours, and 27.3% for those who had used computer for less than 3 hours. And Significantly increased prevalences for cumulative trauma disorder were observed for subjects who had more maximun daily computer use time without break, the prevalence of cumulative trauma disorder was 66.7% for those who had used computer for more than 7 hours, 38.1% for those who had used computer for 3-6 hours, and 21.7% for those who had used computer for less than 2 hours. Multiple logistic regression showed that subjects who had more maximum daily computer use time without break was more likely to report patient. Conclusion: Therefore these findings suggest that preventive interventions on hospital registration desk worker related to computer use were needed

중합 광원과 중합 시간이 복합레진의 표면 경도에 미치는 영향

배상만,김대업,이광희,안호영 대한소아치과학회 2001 大韓小兒齒科學會誌 Vol.28 No.2

플라즈마 아크 광원을 사용하는 광중합기를 저출력 할로겐 광원을 사용하는 전통적인 광중합기와 비교 평가하기 위하여 세 종류의 복합레진을 두께가 2, 3, 4, 5mm인 몰드에 충전하고 레진 상면을 할로겐 광으로 40초간 플라즈마광으로 3, 6, 9초간 조사한 후 레진 상면과 하면의 표면미세경도를 각각 측정하였다. 레진시편 상면의 표면경도와 하면의 표면경도 간의 차이는, 두께 2mm 시편에 할로겐 광을 40초간 조사하였거나 플라즈마광을 9초간 조사한 경우들을 제외하고, 모두 유의하였다(P<0.05). 레진시편 상면의 표면경도는 전체 실험군들에서 서로 유의한 차이가 없었다. 레진시편 하면의 표면경도는 전체적으로 보아 할로겐 광을 40초간 조사한 군들에서 가장 높았고 플라즈마광의 조사시간이 감소함에 따라 감소하였으며 레진시편의 두께가 증가함에 따라 감소하였다. 이상의 결과는 복합레진의 중합깊이 측면에서 볼 때 3, 6, 9초간 조사하는 고출력 플라즈마광의 중합능력이 40초간 조사하는 저출력 할로겐광의 중합능력에 미치지 못함을 시사한다. The purpose of study was to compare the plasma are light with the halogen light in compostie resin curing. Three composite resin materials(Z-100. 3M, USA; Tetric Ceram. Vivadent, Liechtenstein; SureFil, Dentsply, USA) were filled in the teflon molds (4mm in diameter and 2,3,4,5mm in thickness) and cured with esther the conventional low-intensity light curing unit with a halogen lamp (Optilux 360, Demetron, U.S.A) for duration of 40 seconds or with the high-intensity light curing unit with a plasma are lamp (Flipo, Lokki, France) for duration of 3, 6, and 9 seconds. The intensity of halogen light was about 370mW/cm2 and that of plasma light was about 1,900mW/cm2. After one week, the surface hardnesses of both the top and the bottom of the resin samples were measured with a microhardness tester(MXT70, Matsuzawa, Japan). There ware significant differences in the hardness between the top and the bottom of the resin samples except the 2mm thickness samples cured by halogen light for 40s or by plasma light for 9s. There was no significant difference between the hardness values of the top surfaces of the thickness groups. The hardness values of the bottom surfaces decreased as the curing time decreased and as the thickness of resin samples increased, and the three kinds of resin composites showed similar patters. The results suggest that the halogen light for 40 seconds might be able to cure greater depth of resin composites than the plasma light far 3, 6, or 9 seconds.

ISFET의 제조공정 및 그 동작특성

이광만,서화일,손병기 경북대학교 센서기술연구소 1990 센서技術學術大會論文集 Vol.1 No.1

ISFET's fabrication process have been designed and computer simulated with SUFREM-II, and their results are good agreement with each other. ISFET chip has been fabraicated by using the ISRC's standard "3um CMOS process". A two-step TCA oxidation for the gate oxide and multilayer encapsulation using silicone rubber was specially used for the improvement of the stability of the ISFETs. The C-V measurement of gate oxide and the AES analysis of gate nitride were performed.The measured sensitivities of the pH-ISFETs are 43 mV/pH and 54 mV/pH without and with HF treatment, respectively.