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

실리콘 미세가공 기술을 이용한 마이크로 진공 센서

이광만,고성택,김영민,고희선 濟州大學校 工科大學 産業技術硏究所 1998 尖端技術硏究所論文集 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 1x10­³Torr to 1×10² Torr, and shows a good linear operating characteristics in the range of 1x10­² Torr에서 1x10˚Torr.

유포자성 유산균을 함유한 홍삼양갱의 개발에 관한 연구

윤광선,백남수,김영만 안성산업대학교 2006 論文集 Vol.38 No.-

유포자성 유산균인 Lactobacillus sporogenes는 혐기 조건으로는 젖산 발효율 97%로 homolactic acid 발효를 하였고 호기 조건으로는 배양결과 생균수 20 × 10^(8)CFU/mL로 포자형성율도 97%를 얻었다. 또한 유포자성 유산균을 이용한 홍삼양갱을 제조하기 위하여 홍삼양갱의 반제품 1kg의 끓인액의 80℃에서 유포자성 유산균을 첨가{20g (spore수 200 × 10^(8) CFU/g)} 제조한 결과 {1.4 × 10^(8) CFU/g (유포자성 유산균 원말 20g/홍삼양갱 1kg)} 제조 후의 생존율이 70%를 유지하면서 끓인 홍삼양갱 제품에 이용 가능성이 높게 나타났다. 이 제품을 건강식품으로 실용후의 결과를 조사하기 위하여 인공위액(pH 3.0)에 대한 내산성을 조사한 결과 4시간 후에 생존율 50%로 나타났다. 그리고 실온에서 1년간 보존시험결과 생존율이 75% 이상으로 저장성이 우수하다고 판단된다. 이상의 결과에서 볼 때 유포자성 유산균을 함유한 홍삼양갱 등의 건강 기능식품의 개발 가능성이 있다고 사료된다. In order to develop red Genseng Thick Jelly containing lactic acid bacteria. Lactobacillus sporogenes spore which has resistance in heat and low pH was used. Jar fermentor culture of Lactobacillus sporogenes under aerobic condition was showed that the number of spore reached about 20×l0^(8)CFU/㎖ and sporulation rate was 97% and lactic acid production yield was 97% under anaerobic condition. The survival rate of Lactobacillus sporogenes spore showed 70% in the product after addition in 80℃ hot jelly solution. In the treatment of artificial gastric juice(pH 3.0) for 4 hours, the survival rate was 50%. It's storage stability was 70% during the 12 months at room temperature. These results suggest that red Genseng Thick Jelly containing lactic acid bacteria play a role as functional food.

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.

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).

CVD 다이아몬드 박막의 열전도 특성

이광만,고정대,최치규 濟州大學校 産業技術硏究所 2001 산업기술연구소논문집 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 ω 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.

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.

專門大學 齒衛生科의 敎育課程改善에 관한 硏究

鄭萬泰,吳世源,趙民貞,柳一光 광주보건대학 1984 論文集 Vol.9 No.-

This research was studied for the purpose of improving the curriculum of dental hygiene department injunior college and produced some results as follows; 1. The educational aim of dental hygiene department consists in improving students' talents with a view to cultivating dental hygienists necessary to the promotion of people's dental health as well as making a study of the technical Knowledge and theory about the prevention and hygiene of dental and oral diseases, Accordingly these five educational purposes as follows were re-established to achieve two goals. ⓐ Students should be able to do clinical Dental Assiting. ⓑ Students should be able to manage Preventive Dentistry. ⓒ Students should be able to do Dental Health Education. ⓓ Students should be able to guide and develop Public Health dentistry. ⓔ Making students have some qualities to accept the new knowledge and technique of Dental Health. 2. According to the improvement of curriculum, we make the distribution ratio of fundamental studies of developing qualities to technical studies of developing skills at the rate of 4 to 6, In addition we make the proprtion of the theory to the practice of technical subjects at the rate of 6 to 4. ◁표 원문 참조▷

고려후기 교육제도사 연구동향 분석

최광만 韓國敎育史學會 2005 한국교육사학 Vol.27 No.2

This study aims at examining the trends of the current studies about the Korea Dynasty educational system in the latter period, so giving the foundation of the restarting studies about the theme. For this purpose, this study divides current studies into two domains, eg school and examination and subdivides school into three areas(Kukja-Gam, Hyang-Gyo, Private schools) and examination into two areas.(Kukja-Gam-Si, Seungbo-Si) The results are as follows; First, the current studies are lacking of the historical perspective which gives the factual correspondency between the educational phenomenon of former period and latter period. Second, the current studies are lacking of the understanding of the relationship between China and Korea in the same period. Third, the current studies are lacking of the educational theory which gives the meaning to the educational facts. Finally, the current studies are affected by political explanation. The results shows that the current studies have many difficulties in explaining the educational system of Korea Dynasty. In order to escape the difficulties, we must equip with various theoretical arms.