케미컬오일을 이용한 ERF 연마 특성

윤종호,이재종,이응숙,이동주,김영호 한국공작기계학회 2004 한국공작기계학회 춘계학술대회논문집 Vol.2004 No.-

Electro-rheological fluid is recently used for the micro polishing of 3-dimensional micro-aspherical lens. It's also used for polishing small area defects on the wide flat wafer. Since ER fluid shows a behavior of viscosity changing under certain electric fields, micro polishing efficiency may be enhanced for certain cases. In this paper, a perfluorinated carbonyl fluoride oil based ER fluids was used to improve surface polishing rate and submicron-scale accuracy. As the polishing electrodes, micro size cylindrical tools had been used for maximizing the electric field. An experimental device, which was applied for micro polishing a number of wafers of 4 inches in size and other workpieces, was made on a precision polishing system. It consisted of a steel electrode, a wafer fixture, 10mA current and DC 5kV power supply unit, and a controller unit. From the Experiments, the ER fluid is applicable for micro polishing of small parts.

Pion-Nucleon Scattering in Phase Shift Analysis below 400 MeV/c

李應頀,金成度 서울교육대학교 과학교육연구소 1995 科學과 數學敎育 論文集 Vol.21 No.-

본 연구는 400 MeV/c 이하의 에너지 영역에서 위상이동분석(S-, P-, D-파)을 소개하고 그 물리적 의미 및 위상이동에 의한 파이온-핵자 산란단면적을 연구하였다. 이들 에너지 영역에서 π^+p 반응은 이용가능한 실험치와 좋은 일치를 보여 주고 있으나, π^-p 반응은 │p│?? 150 MeV/c보다 낮은 에너지에서 다소 차이를 보여 주었다. 본 연구의 결과로부터 π^-p 반응에서 나타나는 I=1/2에 대한 위상이동은 낮은 에너지 영역에서 더욱 정확한 분석을 요구한다. We have introduced pion-nucleon phase shifts(S-, P-, and D-wave), to study its physical properies, and to provide the cross sections of pion-nucleon scattering calculated using fitted phase shifts for energies below 400 MeV/c. In this energy region, we have found that the agreement is quite respectable for π^+p at all energies, but less good for π^-p below |q| ?? 150 MeV/c.

科學敎育의 效果的인 指道方法 考察

李應護 서울교육대학교 과학교육연구소 1995 科學과 數學敎育 論文集 Vol.21 No.-

까치복의 呈味成分

李應昊,鄭秀烈,趙舜榮,錢重均,車庸準 釜山水産大學校 1983 釜山水産大學 硏究報告 Vol.23 No.1

까치복의 呈味成分에 관한 資料를 얻고자 核酸關聯物質, 유리아미노산, TMAO, TMA, betaine 및 총 creatinine을 分析하였다. 核酸關聯物質 중 IMP가 1.9μmole/g으로서 가장 많았고, 全核酸關聯物質에 대해 39.6%를 차지하였다. 유리아미노산 중 함량이 많은 것은 taurine, lysine, alanine 및 glycine 이고, 이들 네 가지 아미노산이 전유리아미노산의 68.2%를 차지하였다. 총 creatinine�량은 194.5mg/100g으로서 엑스分窒素에 대해 63.4%를 차지하였으며, TMAO 및 betaine 함량은 微量이었다. Omission test 結果 까치복의 呈味成分은 5'-mononucleotides 및 유리아미노산이 주된 구실을 한다는 것을 알았다. Yellowfin puffer, Fugu xanthopterus(Temminck et Schlegel), is one of the most palatable fishes in Korea. However, relatively little is known about the characteristics of its taste. In this study, the taste compounds including nucleotides and their related compounds, free amino acids, trimethylamine oxide, trimethylamine, betaine and total creatinine were analyzed, and their roles in tasting activity were investigated. The amounts of IMP was 1.9 μmole/g, and the ratio of IMP to the total nucleotides and their related compounds was 39.6%. The great portion of free amino acids in the extractives of yellowfin puffer muscle was occupied by taurine, lysine, alanine and glycine in order, and their content was 79.1% of the total free amino acids. Among the organic bases, total creatinine was abundant, and its nitrogen content was 63.4% of total extractive nitrogen. According to the results of the omission test, the main constituents of the characteristic taste of yellowfin puffer could be assumed as free amino acids and 5'-mononucleotides.

궤적 정보를 이용한 냉동 컨테이너 모니터링 시스템

이명진,이응재,하덕천,류근호,백승재 한국지리정보학회 2005 한국지리정보학회지 Vol.8 No.1

위성 통신 기술의 발달로 국부적으로 수행리던 위치 추적의 범위가 선 세계로 3~4간되었다 하지만 기존의 물류 관제 시스템들은 관제 서버와 물류간의 통신을 위하여 휴대폰 통신망을 이용하기 때문에 일부 지역 내에서 이동하는 물류에 대해서만 관제가 가능하다. 이 논문에서는 위성 통신을 이용하여 전 세계를 이동하는 물류 매체인 냉동 컨테이너의 위치 및 상태 정보를 관리하기 위한시스템을 제안하였다. 제안 시스템은 냉동 컨테이너의 상태를 직절 관제하는 데이터 수집부, 관제서버와의 통신을 담당하는 위성 통신부, 냉동 컨테이너 정보를 판리하는 관제부로 구성된다. 시스템의 관제부에서는 냉동 컨테이너의 위치 주적 및 관제를 효과적으로 수행하기 위하여 기존의 TB 트리를 기반으로 하는 다중 버전 이동 객체 색인을 사용하였다. 제안된 냉동 컨테이너 관제시스템은 화주, 운송회사 등 육해상 물류관련 기관에서 냉동컨테이너 및 선박 위치추적, 컨테이너 통제, 컨테이너 통계 등 다양한 용도로 사용될 수 있어 화주에게는 컨테이너 운송에 대한 서비스를 제공하며, 선사에게는 선박안전경보시스템, 선박 관리, 냉동컨테이너를 효율적인 관리 기능을 제공하게 한다. As developing satellite communication, the tracking range of the moving objects which move in local area is expanded to the whole world. However previous logistics management system is able to monitor freight which transporting in local area using mobile communication system. In this paper, we propose the reefer container management system that manages the location information and other related information such as temperature, humidity of container using the satellite system. The proposed system consists of three parts; data collector, satellite communication manager, reefer container information manager. And the proposed system uses the moving object index for managing the trajectory of container and tracing the location of container or vessel that is transporting the container, and supports various services such as reefer container and vessel tracking, container control and container statistics to logistic companies like shipper and forwarding agent. And the system can be increasing the quality of container transportation service to the shipper, and it makes the efficient management of reefer container to the shipping company.

굴비 製造中의 核酸關聯物質의 變化

李應昊,金洙賢 釜山水産大學校 1975 釜山水産大學 硏究報告 Vol.14 No.2

굴비 製造中의 一般成分, 아미노態窒素, 總窒素 및 核酸關聯物質의 變化를 實驗하여 다음과 같은 結果를 얻었다. 1. 原料 참조기에는 IMP와 inosine含量이 월등하게 많았고, ATP, ADP, AMP및 hypoxanthine은 적었다. 2. 마른간 工程中, 原料 참조기중에 많았던 IMP(13.7 μmloe/g, dry base) 는 약 1/9로 inosine (12.9μmole/g, dry base)은 1/3로 減小하였고, 한편 hypoxanthine은 5.7培로 增加하여 19.2μmole/g, dry base였다. ATP, ADP 및 AMP는 큰 變化가 없었다. 마른간 한 後 굴비를 製造하기 위한 乾燥工程에는 鹽藏直後에 많았던 hypoxanthine은 約 1/2로 減小하여 10.2μmole/g. dry base였다. 굴비 중에는 hypoxanthine 含量이 가장 많고, ATP, ADP, AMP, IMP��inosine은 量이 아주 적었다. 3. 굴비 製造中 脫水는 主로 鹽藏工程中에 일어 났으며, 아미노態窒素는 原料 참조기에 乾物重量基準으로 136㎎%이던 것이 鹽藏直後에 298㎎%로서 鹽藏工程中 2.2倍 增加하였고, 굴비 第品은 354mg%로서 鹽藏後 굴비를 製造하기위한 乾燥工程中에 다시 增加하며 原料에 비하여 2.6倍 增加하였다. 4. 굴비의 獨特한 맛에 核酸關聯物質은 큰 구실을 하지 않는다고 보아지며, 아미노態窒素가 굴비 製造工程中 월등히 增加하는 것으로 보아 呈味性 아미노산 및 肉組織이 큰 구실을 할 것으로 보아진다. "Gulbi", salted and dried yellow corvenia, is one of nation-widely consuming fish foods in this country. In this paper, the degradation of nucleotides and their related compounds in yellow corvenia during "Gulbi" processing was studied. The nucleotides and their related compounds were extracted with cold perchloric acid and the amounts were determined by anion exchange column chromatography. In raw yellow corvenia, the results showed that IMP and inosine were dominant and the content of the former was 42.4% and the latter was 39.9% of total nucleotides and their related compounds, and hypoxanthine was 10.4% while the content of ATP, ADP and AMP were low. The IMP and inosine tended to degrade rapidly and hypoxanthine increased remarkably during cry salting for 14 days. After salting and drying, hypoxanthine remained more than the other nucleotides and their related compounds, and ATP, ADP and AMP hardly changed. After "Gulbi" processed, the content of hypoxanthine was the highest whereas ATP, ADP, AMP, IMP and inosine were lower. Free amino nitrogen increased to 2.6 times of that in raw muscle during "Gulbi" processing. As a conclusion, it is presumed the characteristic flavor of "Gulbi" is not attributed to the nucleotides and their related compounds but free amino acid and texture of muscle.

自然科 探究 學習에 관한 實험 模索 : 電氣 回路 單元을 중심으로 with the unit about electric circuits

李應護,具德吉 서울교육대학교 과학교육연구소 1995 科學과 數學敎育 論文集 Vol.21 No.-

Polyethylene glycol 용액(Colyte^(R))을 복용한 후 발생한 Boerhaave 증후군 1예

이관행,기승석,김인숙,김민정,박인호,장세중,하지수,김응수 朝鮮大學校 附設 醫學硏究所 2006 The Medical Journal of Chosun University Vol.31 No.3

Spontaneous esophageal rupture (Boerhaave's syndrome) is a rare case that require early diagnosis and treatment because of its high mortality. The oral administration of osmotically balanced polyethylene-glycol-based electrolyte preparation is a commonly prescribed preparation for cleansing in patients undergoing colonoscopy. Nausea, vomiting and abdominal pain are frequently seen, but serious adverse reactions are rare. Esophageal rupture secondary to severe vomiting, which occurred during colonoscopy preparation using polyethylene gIycoI(PEG) electrolyte solution is extremely rare and only few cases have been published in the literature. We report a case of spontaneous esophageal rupture after routine administration of the PEG before colonoscopy. 대장 정결을목적으로 PEG 사용 후 아주 드물게 발생하는 Boerhaave 증후군 1예를 경험하였기에 보고하는 바이다.

自然科 探究過程 技能測定 評價자料開發에 關한 硏究

李應頀,河炳權 서울교육대학교 과학교육연구소 1977 科學과 數學敎育 論文集 Vol.3 No.-

플라보노이드의 세포 신호전달 조절

이응룡,강근호,강용진,김우열,최혜연,김봉우,정효순,조쌍구 충남대학교 형질전환복제돼지연구센터 2007 논문집 Vol. No.10

Many studies revealed the neuroprotective, cardioprotective, and chemopreventive actions of dietary flavonoids. The plausible mechanistic interpretation of the various effects of flavonoids was concentrated on the anti-oxidant or free radical-scavenging properties of these phytochernicals, both in model systems and under in vivo conditions. While there has been a major focus on the anti-oxidant properties. there is an emerging view that flavonoids and their in vivo metabolites. do not act as conventional hydrogen-donating anti-oxidants. but they may exert regulatory functions in cells through actions at protein kinase or lipid kinase signaling pathways. Flavonoids and more recently their metabolites. have been reported to act at phosphoinositide 3-kinase(PI 3-kinase). Akt/protein kinase B(Akt/PKB), protein kinase C (PKC), mitogen activated protein kinase(MAP kinase), and various tyrosine kinases signaling cascades. Inhibitory or stimulatory actions at these pathways are likely to affect cellular function profoundly by altering the phosphorylation state of target molecules and by modulating gene expression. A clear understanding of the mechanisms of action of flavonoids, either as anti-oxidants or modulators of cellular signaling pathways, and the influence of their metabolism on these properties are key to the evaluation of these potent biomolecules as anti-cancer agents, cardio-protectants, and inhibitors of neurodegeneration.