• 디지털융복합연구
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• 제20권3호
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• pp.389-397
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• 2022

의학 분야에서 인터넷 활용의 증가로 대용량 의학 데이터를 효율적으로 전송할 수 있는 기술이 요구되고 있다. 광 인터넷에서 모든 OBS 노드들은 하드웨어 컴포넌트인 광 지연 라인들을 가지고 있다. 이것들은 몇 가지 최적 트래픽 조건을 이용해 계산되기 때문에 트랙픽 조건이 변하면 광 지연 라인들도 변해야 한다는 것을 의미한다. 이에 본 논문에서는 트랙픽 조건이 변하더라도 기존에 설치된 광 지연 라인을 이용하는 서비스 차등화 알고리즘을 제안한다. 트래픽 조건이 변할 때, 새로운 알고리즘은 데이터 버스트의 길이를 결정하기 위해서 사용되는 스레쉬홀드 값을 동적으로 계산한다. 그러므로 트래픽 조건이 변할지라도 제안된 알고리즘은 광 지연 라인의 대체 없이도 클래스들 사이에서 서비스 차등화를 달성할 수 있다. 본 알고리즘을 이용하면 손실에 민감한 대용량 의학 데이터를 효율적으로 전송할 수 있다.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2006년도 Proceedings of ISRS 2006 PORSEC Volume II
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• pp.702-705
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• 2006

Change detection is a core function of remote sensing. It can be widely used in public services such as land monitoring, damage assessment from disaster, analysis of city growth, etc. However, it seems that the change detection using satellite imagery has not been fully used in public services. For the person who is in charge of public services, it seems not to be ease to implement the change detection because various functions are combined into it. So, to promote the use of the change detection in public services, the standard, the process and the method for the change detection in public services should be established. And the software which supports that will be very useful. This study aims to promote the use of satellite imagery in public services by building up the change detection process which are suitable for general public services and developing the change detection software to support the process. The software has been developed using ETRI Components for Satellite Image Processing to support the interoperability with other GIS software.

• 대한의용생체공학회:의공학회지
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• 제18권1호
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• pp.79-86
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• 1997

This paper describes the development of portable arousal measurement and analysis system. Skin impedance change which responds to the change of arousal level was detected by the three elctrode constant current method and separated into two components(SIR, SIL). Relationship between Nz, IRI and arousal level was studied and criteria of arousal level control was decided by the sleep study. Measured data with and without warning signal were compared and analyzed.

• 대한의용생체공학회:학술대회논문집
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• 대한의용생체공학회 1996년도 춘계학술대회
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• pp.60-64
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• 1996

This paper describes the development of portable arousal measurement and analysis system. Skin impedance change which responds the change of arousal level was detected by the three electrode constant current method and separated into two components (SIR, SIL). Relationship between Nz, IRI and arousal level was studied and Criteria of arousal level control was decided by the sleep study.

• 한국식품과학회지
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• 제26권6호
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• pp.690-695
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• 1994

들깨와 들깨 증자를 $25{\sim}28^{\circ}C$ 에서 $2{\sim}3$일간 발아시켜 얻은 발아들깨로부터 n-hexane으로 들기름을 추출한 후 이들 2종류의 틀기름에 함유되어 있는 산화방지 성분을분리하고, 발아에 외한 산화방지 성분의 함량 변화가 틀기름의 산화안정성에 미치는 영향을 검토하였다. 들기름을 acetone 및 methanol에 용해시켜 동결처리한 다음 분리된 불용성 획분의 산화안정성을 측정한 결과 들기름에 존재하는 산화방지성 물질은 methanol에 용해성이 강한 성분임을 확인하였다. 들기름에서 분리된 methanol 가용성 획분을 silica gel column chmmato-graphy로 분획하여 산화방지 활성을 검정한 결과 n-hexane : ethyl acetate의 비가 7 : 3인 획분에서 가장 높은 산화방지 활성을 나타내었다. 산화방지 활성이 가장 높았던 획분을 TLC로 분리한 결과 3개의 band가 확인되었다. 이중 $R_f$치 0.71인 band핀가 가장 높은 산화방지 활성을 나타내었으며 이 band에 존재하는 산화방지 성분은 phenol성 화합물로 추청되었다. TLC에 의하여 분리된 산화방저 성분을 다시 HPLC에 의하여 분러한 결과HPLC chromatogram상에서 4가지 활성물질 peak가 분리되었다. 이들 peak중 들깨에서는 P 1, P 2의 함량이 각각 46.5%, 25.6%이었고 P 3의 함량은 22.6%이었으나, 발아들깨에서는 P 1, P 2의 함량이 각각43.8%, 20.6%로 약간 감소한 반면 P 3 함량은 29.8%로 상당량 중가하였다. 이와 같이 HPLC 분석에서 분리된 4가지 peak중 발아에 의해 P 1, P 2의 활성물질 함량은 상대적으로 감소하고 P 3의 활성물질 함량은 증가하는 것으로 보아 이들 물질외 함량 변화에 의해서도 들깨 및 발아들깨로부터 추출한 들기름의 산화안정성이 다르게 나라나는것으로 추청되었다.

• 품질경영학회지
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• 제20권2호
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• pp.44-54
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• 1992

In conventional fault-tree analysis, the failure probabilities of components of a system are treated as exact values in estimating the failure probability of the top event. For the plant layout and systems of the products, however, it is often difficult to evaluate the failure probabilities of components from past occurences, because the environments of the systems change. Furthermore, it might be necessary to consider possible failure of components of the systems even if they have never failed before. In the paper, instead of the probability of failure, we propose the possibility of failure, viz, a fuzzy set defined in probability space. Thus, in this paper based on a fuzzy fault-tree model, the maximum possibility of system failure is determined from the possibility of failure of each component within the system according to the extension principle.

• 대한화장품학회지
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• 제26권2호
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• pp.9-12
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• 2000

Certain types of anti-inflammatory components and whitening components were in practical use as the active ingredients of quasi drugs expected to display their pharmacological actions. However, only twenty years at most have past since the introduction of cosmetics that not only physically change the condition of the surface of the skin, but also promote skin homeostasis from by acting on the physiological mechanisms of the skin. Since then, much effort hasa been made to find new active ingredients suitable for full-scale development, and the term "cosmeceutical" has often been coined to describe cosmetics containing pharmacologically active components. In this report, the prospects of cosmeceuticals will be discussed on the basis of a review of the history of the development of current skin-care products.

• 한국식품영양과학회지
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• 제29권4호
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• pp.582-585
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• 2000

This study was performed to identify the flavor compnenets of Korean Cnidium officinale M.. The extraction of the flavor compounds of Cnidium officinale M. was accomplished by a simultaneous distillation and extraction method using a Likens and Nickerson's extraction apparatus. The concentrated extract was analyzed and identified by gas chromatography and GC-mass spectrometry. The change of the 림팩 contents in each samples was determined in terms of two different storage conditions. The flavor contents of sample at low temperature storage were higher than those at room temperature storage, and increased until storage period of 70 days. The major components of Cnidium officinale M. were terpene compounds including α-pinene, β -selinene, γ-selinene, and phthalides including butylidenephthalide, cnidilide, neocnidilide, senkyunolide A, ligustilide, which are believed to contribute to the characteristic flavor of the Cnidium officinale M.. Especially, great amount of cnidilide and ligustilide was shown in sample of low temperature storage.

• Advances in concrete construction
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• 제12권6호
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• pp.491-497
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• 2021

Cell components play vital role within the cell when the cell under goes deformation. These components are microtubules, microfilaments and intermediate filaments. Intermediate filaments are like thread and are of different types. Like microtubules and microfilaments these components also undergo the deformation and their dynamics affected when change occurs within cell. In the present study, bending of intermediate filaments are studied keeping the nonlocal effects under consideration. It is observed that the nonlocal parameter has a great impact on the dynamics of intermediate filaments. This study is made by the application of Euler beam theory.

• 비파괴검사학회지
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• 제12권3호
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• pp.12-19
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• 1992

This paper shows that the identified and unidentified components of surface roughness in NC turning lathe which can not be analyzed in time domain such as $R_{max},\;R_a$ can be isolated in frequency domain by FFT analyzer. By interfacing FFT analyzer with stylus surface roughness instrument, surface roughness on change of working condition, especially tool feed, such as 0.1, 0.15, 0.2, 0.25, 0.3(mm/rev) can be analyzed in frequency domain as follows. 1. By frequency analysis of surface roughness profile, the basic wave length of surface roughness can be obtained to isolate the identified and unidentified components of surface roughness. 2. With increase of tool feed, the unidentified components of surface roughness increase. 3. Since $R_{max}$, which can be obtained by stylus surface roughness is proportion to the output voltage of FFT analyzer, FFT analyzer also can be used to measure surface roughness in time domain such $R_a,\;R_{max}$.