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.

母乳와 乳兒用 粉乳, 市乳內 Cu含量과 乳兒들의 推定 1日 Cu 攝取量

金大善,河萬壙 건국대학교 1988 論文集 Vol.27 No.2

A survey to determine the copper content of early infant food sources was conducted. Collected samples from various lots were human milk from volunteer mothers and infant formula and market milk from markets. The determined results by atomic absorption spectrophotometer were as follows : 1.Averages of Cu were 34.26±13.89 μg/dl in human milk, 192.2±124.2 μg/dl in infant formula, 4.35±2.37 μg/dl in market milk and showed the decline trend by the lactation periods in human milk. (p<0.01) 2.Estimated daily intake of Cu from human milk was higher than that from infant formula in 3 months old infants.

증기압 멸균 소독에 의한 치과용 석고의 물성변화

김연웅,이용근,김광만,김경남,조리라,정경호 大韓齒科器材學會 2003 대한치과재료학회지 Vol.30 No.1

Gypsum products have potential contamination by infectious human pathogens, which could be transmitted from patient to the gypsum model via impression materials. Therefore disinfection and sterilization of gypsum products are recommended. Steam sterilization: namely autoclaving is widely available in dentistry. The aim of this study was to investigate degradation of mechanical properties for dental gypsum after steam sterilization. The effect of autoclaving on compressive strength, weight loss and dimensional accuracy of specimens of commercial die stone such as Crystal Rock(CR : Maruishi), Die Keen(DK : Columbus Dental), Resin Rock(RR : Whip Mix), Tuff Rock(TR : Talladium) were estimated, and experimental gypsums{(EP) : 0.5wt% accelerator, 0.02wt% retarder, 0.1wt% surface agent, 0.1wt% Poly Vinyl Acetate} were also measured the above properties after autoclaving. For each group, five cylindrical(6㎜ in diameter and 12㎜ long) specimens made with manufactures water:powder ratio. All specimens were dried in oven until reaching the constant mass. After dried, they were autoclaved at 121℃ for 20 minute, dried again. Compressive strength was measured before and after autoclaving using mechanical testing machine at a cross-head speed of 0.5㎜/min. The dimensional accuracy was estimated by length change of specimens with digital caliper before and after autoclaving. For statistical analysis, ANOVA Tukeys Studentized Range(HSD) test and T test were used. Compressive strength and weight were decreased in all samples after autoclaving. There is significant difference between CR, DK and RR, TR in after autoclaving(p<0.05). EP exhibited the highest compressive strength after autoclaving. The weight was significantly decreased in all group except RR after autoclaving(p<0.05). The dimensional accuracy was not significantly increased in all group except CR. As this result, we found that resin-containing dental stone is more appropriate for autoclaving in dentistry.

모기 살충성 세균 B. thuringiensis subsp. israelensis의 효과적인 분리 방법

김광현,이광배,신두만 동의대학교 기초과학연구소 1999 基礎科學硏究論文集 Vol.9 No.1

For more convenient and rapidly isolation of Bacillus thuringiensis subsp. israelensis(Bti), 1) heat treatment for spore forming bacteria, 2) growth in enrichment culture media for Bacillus sp. and 3) selection of bacteria producing a lecithinase for Bacillus thuringiensis subsp. israelensis, were performed. Spore forming bacteria were counted 4.8×10^8cells/g soil on NAPGCY media, 9.2×10^7cells/g soil on NA media, and 3.6×10^8cells/g soil on NAAC media, respectively.; Bacteria producing only a lecithinase were reached at 25.2% on medium contained egg york, bacteria only producing a delta-endotoxin were reached at 23.2% by phase contrast microscope, and bacteria producing a lecithinase & a delta-endotoxin simulten-iously were reached at 13.7%. Bacillus thuringiensis which producing a lecithinase and a delta-endotoxin simultaniously among bacteria producing a lecithinase, were reached at 56.5%; A half of Bacillus thuringiensis was produced a delta-endotoxin, but not produced a lecithinase. Among 8 isolates of Bacillus thuringiensis, two strain of Bti which has a mosquito-cidal toxin, were detected by PCR using a specific primer of δ-endotoxin gene form Bti.

貯水地 堆砂가 水質에 미치는 影響

김수삼,이광만 중앙대학교 생산공학연구소 1993 생산공학연구소 논문집 Vol.2 No.2

저수지에서 부유사의 이동 (find sediment transport)은 수문학적, 화학적 그리고 퇴적된 입자들의 재부유 및 침전(deposition), 응집(flocculation)을 포함하는 생태학적 요소 (biological parameter) 및 수온과 수질분포상태(Water Quality distribution)의 지배를 받으며, 계절적으로는 저수지 성층의 수온 변화에 따른 재부유(resuspension) 및 대류(advection)와 분산(dispersion)의 영향을 받는다. 특히 저수지로 유입하는 Fine Sediment는 빠른 속도로 저수지 바닥에 퇴적되어 저니층을 형성하며, 이들 저니(sediment)는 다량의 P,N등의 성분을 함유하고 있어 이들 물질을 이용하여 광합성을 하는 조류(algae)의 과잉번식 현상을 초래해 저수지를 부영양(eutropication) 상태로 만들고 있다. 본 연구에서는 우리나라 주요 다목적댐들의 퇴사 문제 및 유입된 저니(Sediment)의 특성 및 성분 그리고 이들 저니에 함유되어 있는 유기물질에 의한 저수지 부영양화와의 관계를 설명하고 이의 해결방안을 찾고자 한다. Fine sediment transport in a reservoir depends on the hydrologic, seasonal changes of thermocline, chemical and biological condition. It is also influenced by water quality distribution including resuspension, deposition and flocculation of the sediments. For the large-scale reservoirs in Korea, sediments do not look like to cause any significant problem as regarding the life time of the structure and the elevated inundated area due to the sediments accumulation. However, fine sediments contained with large portion of nutrients flow into reservoirs, and these are the one of the nuisance saurces in water quality management. Because these fine sediments contain a large amount of nutrients including phosphorous and nitrogen components, these cause overbreeding photosynthetic algae resulting in near-eutrophication of the reservoir. This study aims at finding the relationship between sediments deposition and eutrophication of large-scale reservoirs in Korea, including some prospective solutions to the recent problems in the reservoir system management.

과학기술계산을 위한 전자계산기용 특수 Library 개발에 관한 연구

金相萬,姜承業,沈在洪,文東纘,徐光烈,洪勝弘,愼哲宰 광운대학교 1972 論文集 Vol.2 No.-

In this paper the subroutine library of digital computer techniques to the solution of electronic networks problem are discussed. The application of digital-computer techniques to the solution of the integrations relating the terminal variables for linear time invariant inductos and capaciters are analyzed, then on the techniques of numerical integrations trapezoidal method is used. The subroutine library for differential equations and determinations which are used in electronic networks analysis have been developed. Since these programs are the general form, anybody can utilize the programs for his own purpose.

Diphenyl-2-ethanolamidophosphate 의 합성과 폴리에스테르 직물에 대한 방염성에 관한 연구

김영만,이광우 한국의류산업학회 2000 한국의류산업학회지 Vol.2 No.2

Diphenyl-2-ethanolamidophosphate (DPEOAP) was synthesized to treat polyester fabrics in order to improve its flame retardancy. The flame retardancy and physical properties of DPEOAP-treated polyester fabrics were investigated. The results were as follows: 1) polyester fabrics can be treated with DPEOAP by means of Pad-Dry-Cure method, because DPEOAP was easily soluble in benzene. 2) The most economic conditions of treatment were determined as 10% of DPEOAP cocentration, 140℃ of curing temperature, and 2 minutes of curing time. 3) Though the washablity of DPEOAP is low in comparison with the other products which are purchasable in a market, it has an excellent flame retardment effect 3 times more than in number of flame contact just with 0.66% add-on. 4) The physical properties of DPEOAR treated polyester fabrics were little changed as compared with non-treated fabric.

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.

농업구조물의 안전진단 및 개·보수 공법 선정 시스템 개발

김종옥,고만기,최진용,김기동,윤광식,김한중 公州大學校 産業開發硏究所 1998 産業開發硏究 Vol.6 No.-

A study was conducted to develope a system for safety appraisal and repair works on agricultural structures. Location, size, type, maintenance record, structural and functional problems of agricultural structures in Yedang irrigation district were surveyed. A grahpic user interface program assisting onsite field investigation of typical agricultural structural problems such as fractures and cracks of members was developed. Typical rehabilitation methods were investigated and coded for database development.

배열형 전력 MOSFET의 설계 및 제작

김진형,최연익,정상구,박찬광,김충기,성만영 亞洲大學校 1987 論文集 Vol.10 No.-

In this paper, the design of the array type power MOSFETs is discussed in terms of on-resistance, breakdown voltage, placement of FLRs(field limiting ring) and threshold voltage. Also, 9-cell(square-on square grid) VDMOSs are fabricated to confirm the feasibility of the design method. Existence of optimum p-well spacing for minimum on-resistance, which is anticipated by the theoretical results is confirmed by the experiment of the fabricated power MOSFETs. Breakdown voltage of power MOSFET is upgraded by using two FLR's and their optimum placement is determined from the experimental results of the diodes with FLRs. The threshold voltage is controlled by the ion implantation within the design specification. Experimental results are in good agreement with the design specification. Experimental results are in good agreement with the design values. Characteristics of the fabricated power MOSFETs are 190Ω in on-resistance, 270V in breakdown voltage and 2.9V in thershold voltage.