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.

진주담치 濃縮엑스분의 製造 및 利用

李應昊,具在根,車庸準,文聖勳 釜山水産大學校 1983 釜山水産大學 硏究報告 Vol.23 No.2

진주담치 乾製品, 製造時 副産物로 생성되는 엑스분을 食品加工用 中間素材로서의 이용가능성을 검토하고자 진주담치 濃縮엑스분을 製造하였으며 그 製品의 化學成分 및 重金屬含量을 分析하였다. 그리고 용도개발 實驗을 하여 다음과 같은 결과를 얻었다. 1. 진주담치를 98℃에서 20分間 蒸煮하여 生成된 엑스분을 93℃에서 4時間 동안 이중솥에서 paste狀으로 될 때까지 濃縮한 결과 製品의 수율은 5.8%였으며, 製品의 水分含量은 42.8%였고, 乾物量 基準으로 粗蛋白質은 32.7%, 글리코겐은 4.8%, 무기질은 31.6%였다. 그리고 pH는 5.16, VBN은 67mg/100mg이었다. 2. 濃縮엑스분 製品의 遊離 아미노산 含量은 全엑스분 室素의 71.4%를 차지하였으며, glycine, arginine, alanine, phenylalanine, lysine, tyrosine, histidine, methionine 및 leucine의 9종의 아미노酸이 總아미노酸의 89.6%를 차지하였다. 3. 용도개발 목적으로 인스탄트 면류 조미수우프 및 크림수우프를 만들어 市販 수우프류를 對照製品으로 官能檢査한 결과 거의 손색이 없었으며 패류 특유의 시원한 맛이 있었다. 그리고 重金屬 含量도 극미량으로 진주담치 濃縮엑스분 製品은 食品衛生上의 安全性이나 營養面에 있어서 손색이 없고 天然香味를 지닌 우수한 食品加工用 中間素材로 利用가능하다는 結論을 얻었다. In order to utilize extracts which are produced as a by-product when dried sea mussel products are processed, concentrated extracts of sea mussel was prepared and its chemical composition, quality stability and effective methods of its utilization are examined. 1. After the sea mussel was steamed at 98℃ for 20min, extracts was concentrated as a paste state in a double jacketed cooker at 93℃ for 4 hrs. 2. The yield of concentrated extracts of sea mussel was 5.8%, and the content crude protein was 32.7%, glycogen 4.8%, minerals 31.6%, VBN 66.87mg % and heavy metals (Pb, Cd, Hg, Cu, Zn) were trace in content. 3. The content of total free amino acids of the product was 71.4% of total extractive nitrogen and the abundant contents of amino acid in the product were glycine, arginine, alanine, phenylalanine, lysine, tyrosine, histidine, methionine, leucine. Judging from sensory evaluation, the instant noodle soup and cream soup made from concentrated extracts of sea mussel were not inferior to the control which purchased on the market.

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.

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.-

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.-

直接波 逆信號에 의한 音響 Feed Back 制倨에 관한 硏究

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

Acoustic feed back system is the oscillating phenomenon occured in the loop which is formed by loud speaker, microphones and amplifier in sound reinforcement system. If we turn up the gain of amplifier to increase the sound volume, sound reinforcement is impossible because of the oscillation due to this loop. A few methods such as echo cancelling system and linear array of non-directive microphones for howling prevention have been studied by others. It is the purpose of this paper to investigate the possibility of acoustic feed back by negative signal of direct wave. The time delay circuit was used to minimize the difference of the out-put voltages by adjusting the distance between two micro-phones whose frequency characteristics of the out-put voltage are similar to each other from loud speaker. The signal of the first microphone and the opposite signal of the second micro-phone are added in the adding circuit. The results of this investigation are as follows; a pair of microphones, that the frequency characteristic difference of the out-put voltage is minimum under the constant acoustic pressure, could be selected by adding two signals in the adding circuit. It could be possible to minimize the difference of transfer characteristic by adjusting the distances between two microphones, by use of time delay circuit. In the room with absorption mats, the howling level gain above 10 dB could be achieved by use of the acoustic feed back control part(time delay circuit, adding circuit and comb filter), but in the ordinary lecture room, howling level gain was low because of the interference of reflective waves from various objects and noise as well.

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.

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.

Ag薄膜의 電氣的 特性

李應頀 서울교육대학교 과학교육연구소 1981 科學과 數學敎育 論文集 Vol.7 No.-