중심점 탐색없는 지문 정합 알고리즘에 관한 연구

장경식,임재영,최영규 한국기술교육대학교 2003 論文集 Vol.10 No.1

We propose a fingerprint matching algorithm that compares distance and included angle sequence among minutiaes with another's. We defined this sequence as minutiae constellation which has a basic unit is distance and included angle sequence among three minutiaes. This algorithm searches nearest minutiae from a minutiae and repeatedly searches nearest minutiae from just before searched minutiae. It doesn't search core and is independent of translation and rotation because matching stage only uses distance and included angle sequence.

수수로부터 아플라톡신B₁ 정량분석에 관한 연구

정향동,원옥남,구경림,류성렬 한국공업화학회 2003 응용화학 Vol.7 No.2

Aflatoxin B₁was known to have the strongest poisonous character among Aflatoxn compounds. To search the production of Aflatoxin B₁according to the change of temperature and relative humidity, millet incubated with Aspergillus flavus KCCM 35078 was incubated at 20℃, 25℃, 30℃, 25℃ and at relative humidity 50%, 60%, 70% and for incubation time 72, 96, 120, 144, 168, 192 hours. Production of Aflatoxin B₁shows that the highest production appeared at 25℃ and its relative humidity 70%. The result that was quantitatively analyzed by using HPLC was 23.35ppm, and by using fluorescence detector was 23.50ppm Production of Aflatoxin B₁shows that the lowed production appeared at 20℃ and its relative humidity 50%. The result that was Quantitatively analyzed by using HPLC was 6,26ppm, and by using fluorescence detector was 6.33ppm The structure of Aflatoxin B₁was identify with authentic sample by using instrumental analysis methods of MS, H-NMR, FT-IR, respectively.

우관상동맥 개구부 완전 폐쇄가 동반된 대동맥 판상부 협착증 1례

임상현,김종진,김희열,진승원,전희경,노태호,채장성,김재형,홍순조,최규보,윤정섭,김치경 대한순환기학회 2000 Korean Circulation Journal Vol.30 No.4

오렌지로부터 아플라톡신B₁의 정량분석에 관한 연구

장향동,백광균,구경림,옥선미,최진석,고은주,류성렬 한국공업화학회 2004 응용화학 Vol.8 No.2

Aflatoxin B₁ was known to have the strongest poisonous character among Aflatoxin compounds. To search the production of Aflatoxin B1 according to the change of temperature, relative humidity and incubation days, orange incubated with Aspergillus parasiticus KCCM 35078 was incubated at 20℃, 25℃, 30℃ at relative humidity 60%, 70%, 80% and for incubation time 3, 4, 5, 6, 7 days.. Production of Aflatoxin B₁ shows that the highest production appeared at 25℃ and its relative humidity 70%. The result that was quantitatively analyzed by using HPLC was 77.41ppm, and by using Fluoroscence detector was 87.87ppm. - Production of Aflatoxin B₁ shows that the lowest production appreared at 20℃ and its relative humidity 80%(HPLC), 60%(Fluoroscence detector). The result that was quantitatively analyzed by using HPLC was 4.47ppm, and by using Fluoroscence detector was 4.17ppm. The structure of Aflatoxin B₁ was identify with authentic sample by using instrumental analysis methods of GC/MS, ¹H-NMR, FT-IR respectively.

저전력형 부탄가스 감지소자의 제조 및 그 특성

장경훈,임준우,강봉휘,이덕동 경북대학교 센서기술연구소 1995 센서技術學術大會論文集 Vol.6 No.1

Low power consuming butane gas sensors were fabricated using mica substrate which is a thin and elastic insulator. To increase the sensitivity and the stability, various catalyst layers were formed on SnO_(2) thin layer. Among them, SnO_(2) /Pt(17Å)/Pd(30Å) and SnO_(2) /Pt(8Å )/Pd(30Å) thin layer showed good characteristics in stability and dependance of temperature and humidity. The size of fabricated sensors was 1 x 3 mm^(2) and the consumed power was lower than 100 mW at operating temperature(250℃). For 2000 ppm butane concentration, the response time and the recovery time were about 5 seconds and 15 seconds respectively. The sensitivity of the sensors was about 80 % for 5000 ppm butane concentration.

채널 식각형 비정질 실리콘 박막 트랜지스터에서 배면에 수소 이온 도핑효과

장진,최종현,이경하,임병천,김창수 慶熙大學校 레이저 工學硏究所 1997 레이저공학 Vol.8 No.-

We have studied the effect of the hydrogen ion doping on the free surface of back channel etched a Si:H TFTs. The hydrogen ion doping on the back channel etched TFT reduces the off-state photo leakage current by one order of magnitude. The reduction of the photo-leakage current is due to the creation of defect states at the free surface by hydrogen ion doping. After hydrogen ion doping on the free surface, the field effect mobility change little, but the threshold voltage increases, which is due to the state creation in a-Si:H by ionized H ions. Furthermore, the off-state leakage current under frontlight illumination can be reduced by 2 orders magnitude by hydrogen ion doping on the back channel of a Si:H TFT.

자외선과 피부에 관한 고찰

장경자,임유성 경복대학 2000 京福論叢 Vol.4 No.-

태양은 우리의 삶에 필수적이다. 그러나 오늘날 CFC가 지구상의 생물체를 보호하는 오존층을 파괴하고 있다. 따라서 지상에 도달하는 태양광선의 양과 강도가 증가하고 있다. 몬트리올 의정서에 의해 CFC의 생산과 사용이 제한되고 있으나, 이미 사용되어 성층권에 존재하는 CFC가 사라지는데는 오랜 기간이 필요하다. 태양광선을 완전히 차단하기는 불가능하므로 피부에 대한 자외선의 효과와 자외선으로부터 피부를 보호할 수 있는 적절한 방법을 알아야 한다. 본 연구는 다음과 같은 내용을 포함한다. - 지구상의 태양광선의 양과 강도를 변화시키는 다양한 요소들 - 멜라노 타입에 따른 개인의 피부보호 능력과 광민감도 - 피부에 미치는 자외선의 즉각적, 지연된, 장기적인 효과 - 자외선에 대한 적절한 피부 보호 본 연구는 아래와 같이 결론지어 진다. 같은 환경아래서도 태양광선은 개인에 따라 다른 효과를 나타낸다. 이는 개개인의 멜라노 타입과 광민감도가 다르기 때문이다. 오존층파괴로 더 많은 자외선이 지상에 도달하고 현재로선 태양광선에 과도한 노출을 피하고 적절한 보호 방법을 취하는 것이 필요하다. 결국, 적절한 보호를 취하기 위해서는 개인의 멜라노 타입과 광민감도를 인지하는 것이 중요하다 하겠다. The sun is essential to our lives. But, at present the CFC's are depleting the ozone layer that protect the biological beings on the earth. In consequence the quality and the intensity of the solar radiation is increasing on the surface of the earth. In accordance with the Montreal Protocol the production and use of the CFC is limited 3ut it takes a long time for already used CFCs in the stratosphere to disappear. It is impossible to completely avoid solar radiation. Thus it is important to know the effects of solar ultraviolet radiation on human skin and appropriate actions people should take for protections against it. The contents of the study are as follows ; - the various factors modifying the quality and the intensity of solar radiation on the surface of the earth, - the protection capacity of skin and solar sensitivity of subjects according to the melanotype, - the immediate, delayed and long-term effects of solar UV radiation in human skin, - the appropriate protections for human ski1 against solar UV radiation. In conclusion this study disclosed followings ; At the same environmental conditions, the solar radiation effects are different for each individual, because of different melanotype and different solar sensitivity. Ozone depletion delivers more ultraviolet radiation to the surface of the earth and there is no safe way to tan at present. It is necessary to avoid overexposure or excess sunlight, and to take appropriate protections. Finally, it is important to recognize melanotype and solar sensitivity of subjects in order to get available protections.

감압하에서의 김치숙성과 열처리

정자림,김미향,김미정,장경숙,김순동 대구효성가톨릭대학교 식품과학연구소 1994 식품과학지 Vol.6 No.-

김치의 숙성과 열처리 효과에 미치는 감압의 영향에 대한 실험결과를 요약하면 다음과 같다. 김치를 560㎜Hg과 360㎜Hg에서 숙성시킨 경우는 상압보다 젖산균의 생육이 촉진되는 반면호기성균이 감소되어 김치의 품질이 향상되었다. 그러나 0㎜Hg에서는 균의 생육이 저해됨과 동시에 김치조직이 손상되었다. 560㎜Hg와 360㎜Hg에서 숙성시킨 김치는 상압에서 숙성시킨 김치보다 저장성이 높았다. 숙성된 김치를 감압하에서 열처리할 경우 바람직한 감압조건은 460-260㎜Hg이었으며 80℃에서는 4분처리, 100℃에서는 2분처리, 120℃에서는 1분간 처리하는 것이 조직의 상태나 저장면에서 양호하였다. This study was carried out to investigate the effect of sub-atmosphere on the fermentation and heat treatment after fermentation of Kimchi. When the results from the conditions of atmosphere and under-atmosphere were compared, the growth of lactic acid bacteria was increased but the growth of aerobic bacteria was decreased under 560㎜Hg and 360㎜Hg. The number of total microorganism was decreased and simultaneously damaged to the tissue of Kimchi under 0㎜Hg. Kimchi fermented under 560㎜Hg and 360㎜Hg had longer storage duration than that of atmosphere. Among the several conditions, the result of heat treatment under 460-260㎜Hg was the best. The treatment for 4 minutes at 80℃, 2 minutes at 100℃, and 1 minute at 120℃ was good in tissue states and storage.

소아 조갑진균증에서 Itraconazole 주기요법의 치료효과

권경술,이재봉,진현우,오창근,장호선,임재영 대한의진균학회 2003 대한의진균학회지 Vol.8 No.4

레이저에 의한 유리내부의 첨가이온의 전하상태 변화

임기수, 장경식, 신종호, 이수천 忠北大學校部設基礎科學硏究所 2006 自然科學硏究 Vol.20 No.-

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