유도 브릴루앙 산란 광학계에 관한 연구

한영옥,최평석,김재광,은재정 國立 昌原大學校 産業技術硏究所 2000 産技硏論文集 Vol.14 No.-

광섬유 내에서 발생하는 여러 가지 비선형 산란 현상 중에서 유도 브릴루앙 산란 신호에 대해 이론적으로 설명하고 브릴루앙 OTDA 시스템과 브릴루앙 OTDR 시스템에 관해 알아보았다. 유도 브릴루앙 시스템을 실현하기 위해서 두 LD 간의 비트 주파수를 안정화하였으며 브릴루앙 OTDR 형태의 시스템을 구성하여 실험으로부터 SBS 신호를 확인하였고 그 값이 이론적으로 계산된 값과 일치함을 확인하였다.

두 단순고체계 사이의 상호작용의 잠재일 개념에 의한 해석

정평석,김수연 嶺南大學校 工業技術硏究所 1986 연구보고 Vol.14 No.2

The concept of the potential work is developed by considering the maximum possible net work which can be extracted from a composite system composed of two simple solid subsystems, and the interaction between these subsystems is analyzed with the concept of the potential work. The potential work is a state quantity (thermodynamic property) of a composite system and it represents the possibility of the spontaneous internal change of the composite system and it can be used as a convenient tool to analyze the irreversible thermodynamic processes.

컴퓨터를 이용한 영양식단 작성에 관한 연구

邊平華,尹錫權 同德女子大學校 1994 同大論叢 Vol.24 No.1

The computer program was formulated to provide the users with nutritive menu items based on their food preference, food cost per day and the Korean recommended dietary allowances without help of nutrition specialist. The program was formulated by bases of the data containing the cost file for 475 kinds of food items and the 517 recipe file. The cost file was included cost per 1kg and refuse ratio of the food items and the recipe file was loaded iwth the combination of food items for the recipe, the nutritive composition table of food items was calculated considering the loss ratio for the cooking. The menu was planned to be select acording to the users' food preference and food cost. The nutritive composition table of the selected menu was compared with the Korean recommended dietary allowances. The menu planning program also evaluted evergy ratio of carbohydrate, protein and fat in addition to energy ratio of breakfast, lunch and dinner respectively. In this research, Trigem-PC-16 Bit/AT was used, and the data base files and programs were created by using Index file package and COBOL word.

액체-고체 순환유동층에서 액상의 반경 방향 혼합 및 액체-고체 Chaotic 흐름 거동

강석환,이찬기,송평섭,강용,김상돈,김승재 한국화학공학회 2004 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.42 No.2

직경이 0.102m이고 높이가 3.5m인 액체-고체 순환유동층의 상승관에서 압력요동 및 액체의 반경 방향 혼합 특성을 고찰하였다. 상승관에서 얻은 압력요동을 해석하기 위하여 chaos 이론을 도입하였다. 액체 유속, 유동입자의 크기 그리고 고체 유동입자의 순환속도가 연속액상의 반경방향 분산계수 및 압력요동의 위상공간투영과 상관차원에 미치는 영향을 결정하였다. 본 연구의 결과 액상의 반경방향 분산계수는 유동입자의 크기와 순환속도가 증가함에 따라 증가하였으며 액상의 유속이 증가함에 따라 감소하였다. 상승관에서 압력요동의 위상공간투영은 유동입자의 크기가 고체 유동입자의 순환속도가 증가함에 따라 점점 분산되고 복잡하게 되었으나, 액체유속이 증가함에 따라서는 위상공간에서 궤적의 분산이 다소 감소하는 경향을 나타내었다. 압력요동의 상관차원은 유동입자의 크기와 고체 순환속도가 증가함에 따라 증가하였으나, 액체의 유속이 증가함에 따라서는 큰 변화가 없었다. 본 연구의 결과는, 상승관에서 액상의 반경 방향 혼합 특성 압력요동 측정함으로써 실시간으로 예측하는 것을 가능하게 하여 실제공정에 응용함으로써 그 실용적 측면이 크다고 하겠다. Characteristics of pressure fluctuations and liquid dispersion in the radial direction were investigated in the riser of a liquid-solid circulating fluidized bed whose diameter was 0.102m and 3.5m in height. The concept of chaos theory was employed to analyze the pressure fluctuations obtained in the riser. Effects of liquid velocity, particle size, and solid circulation rate on the liquid radial dispersion coefficient and phase space portraits and correlation dimension of pressure fluctuations were determined. It was found that the radial dispersion coefficient of liquid phase increased with increasing particle size or solid circulation rate, but decreased with increasing liquid velocity. The attractor in the phase space portraits became more scattered and complicated with increasing particle size or solid circulation rate, but it became somewhat less scattered with increasing liquid velocity. The correlation dimension of pressure fluctuations increased with increasing particle size or solid circulation rate, but it did not change considerably with increasing liquid velocity. The results of this study enable us to predict the characteristics of liquid radial dispersion by means of the pressure fluctuations for the practical applications.

LED배열을 이용한 광Vector-Matrix 곱셈에 관한 연구

최평석,박한규 연세대학교 산업기술연구소 1984 논문집 Vol.16 No.2

인코히어런트광은 이용하여 vector-matrix 곱셈기를 LED 배열 및 lens계, mask 등으로 구성하였다. 입력 vector 는 LED 배열로 나타내었으며 matrix 는 mask 상에 면적변조방식으로 부호화 하였다. 곱셈의 결과는 lens계를 통하여 photodiode 배열로 검출하였으며 하나의 채널로 출력을 관찰하기 위해 analog multiplexer를 사용하였다. vector 및 matrix의 원소가 양의 실수 및 복소수일 경우에 대하여 출력파형을 관찰하였으며 특히 복소수 data일 경우 mask 상에 부호화 하는 방법을 제시하였다. The vector-matrix multiplier using incoherent optical illumination is constructed with a LED array, lens system and mask. The input vector is represented by a LED array and the matrix is encoded on a film by the mask modulation method. The result of multiplication is detected by a photodiode array through the lens system, and an analog multiplexer is used for looking at output signal on the channel. When the elements of a vector and matrix are positive number and complex number, the output signal is observed. Finally an encoding method in case of complex data is suggested.

지향성 패턴을 이용한 체육관 음성명료도의 향상

崔平錫,金錫載 國立 昌原大學校 産業技術硏究所 1987 産技硏論文集 Vol.1 No.-

In this paper, we study an acoustic array system which is suitable for an auditoriun when a gymnasium is used as an auditorium. The purpose of this paper is to prove that, using this system, any sounds from auditorium stage is clearly noticed at any place of the auditorium. The important part of this system is curve array speakers and assistant speakers group. This curve array speaker is constructed to get the best condition as a reinforcement equipment considering the direction pattern, reverberation time.

마늘의 가열처리가 마늘추출액의 기능성에 미치는 영향

변평화,윤석권 동덕여자대학교 2002 생활과학연구 Vol.7 No.-

Effects of heat treatments of garlic on electron donating ability (EDA), nitrite-scavenging effects (NSE) and total thiosulfinates contents of garlic extracts were investigated. Garlic was heated at 40, 60, 80, 100 and 120℃ for 10~30 minutes and extracted with 50% ethanol. Electron donating ability (EDA) was rapidly decreased as heating temperature and time increased. Heating at higher temperature above 80℃ and over 20 minutes resulted approximately 65% reduction of EDA. The total thiosulfinates contents were affected more than EDA by heating. The garlic heated at 100℃ or higher temperature for longer than 10 minutes caused a 100% destruction of thiosulfinates. Nitrogen scavenging effects (NSE) was found to be relatively stable by heating. Even after heating at 100℃, more than 90% NSE was remained.

송어를 감염원으로 한 광절열두조충 인체감염

정평림,이규재,양용석,안영겸 THE KOREAN SOCIETY FOR BIOMEDICAL LABORATORY SCIEN 1996 Journal of biomedical laboratory sciences Vol.2 No.2

최근 한국에 있어서 광절열두조충 감염예가 가끔 보고되고 있다. 저자등은 1994년 10월 강원도 춘천시 거주 남녀 부부가 함께 담수산 송어회를 먹고 감염된 2예에 대하여 보고하는 바이다. 구충은 하제(下濟)로서 Magnesium sulfate 15gm, 구충제 Praziquantel 15mg/kg를 투여 하였다. 제1예는 인OO, 43세 남자, 69kg의 건강체였으며, 구충하여 얻은 충체는 길이 6.65m, 폭 8-13mm였다. 제2예는 최OO, 39세 여자, 56kg으로 소화불량, 복부 불쾌감을 호소하였고, 구충하여 얻은 충체는 5.50m, 폭 8-13mm이었다. 2예 모두에서 두부는 검출 되지 않았다. 구충하여 얻은 충체의 외관상 형태, 자궁의 선회, 자궁분지(uterine loops)의 수, 생식공의 위치와 절단표본상 음경낭과 저정낭의 형태, 질의 위치, 자궁구의 위치등과 충란을 광학현미경으로 관찰 한 형태, 크기 및 SEM으로 관찰 한 표피의 작은 점각(pits)의 유무, 분포등 형태학적인 특징등으로 Diphyllobothrium latum으로 동정하였다. 이번의 인체 감염은 담수산 송어회가 원인이 된 것으로 믿어지는 예이다. A total of 31 human diphyllobothriasis cases have been reported in Korea. Authors experienced two more human cases of Diphyllobothrium latum infection, especially due to eating raw freshwater trout. Two cases were husband and wife in a famil residing in Chunchon city, Kangwon-do, who raw fish in October 1994. A 43-year old male(husband) was 69kg in body weight and healthy. A worm (6.65m in length; 8-l3mm in width) was expelled from him anthelmintic treatment. The second case(wife) was a 39-year old female who weighted She complained about gastrointestinal trouble and abdominal discomfort. A worm (5.50m in length; 9-l3mm in width) was Obtained her after anthelmintic treatment. No scolex was collected from the two worms. Two patients were administrated with praziquantel(l5mg/kg of body weight) and l5gm of magnesium sulfate as a purgative. Two worms identified as D. latum, based on the following biological characters: extermal morphologies, coiling of uterus, the number of uterine loops, position of genital opening, morphologies of cirrus and cirrus sac and seminal vesicle on the histological sections, positions of vagina and uterine pore, distribution patterns of vitellaria, and microscopical and SEM morphologies of the egg.

국소성 분절성 사구체경화증에서 Cyclosporin A의 치료효과

차응석,권민중,김병길,이재승,최인준 대한신장학회 1996 대한신장학회잡지 Vol.15 No.4

증기 배출구 소음기내 스크린 설치에 따른 소음저감 효과

오국택,정평석 영남대학교 공업기술연구소 2000 工業技術硏究所論文集 Vol.28 No.2

In the present paper, the effect of a screen in a steam vent stack silencer on reduction of sound level was numerically and experimentally studied. The sound level was reduced up to 8% in dB unit as the result of addition of a screen in a silencer. The optimal configuration of a screen in a pilot scale silencer was decided.