• 대한전기학회:학술대회논문집
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• 대한전기학회 1987년도 전기.전자공학 학술대회 논문집(I)
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• pp.201-204
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• 1987

To improve the reliability of boiler controller of a power plant, FTCS(Fault Tolerant Control System) is proposed. We studied to implement a Multi-processor scheme for FTCS. This paper presents the total system to experiment the performance of FTCS and the Multi-processor scheme implemented.

• Journal of Electrical Engineering and Technology
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• 제11권5호
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• pp.1423-1432
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• 2016

• Korean Journal of Acupuncture
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• 제24권2호
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• pp.193-216
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• 2007

Objectives : The aim of this study was to examine the effect of electroacupuncture (EA) at the PC8 on normal human beings by using power spectral analysis. Methods : EEG (Electroencephalogram) power spectrum exhibits site-specific and state-related differences in specific frequency bands. In this study, power spectrum was used as a measure of complexity. 32 channels EEG study was carried out in 20 subjects (20 males; age=26.8 years old). Results : In ${\alpha}(alpha)$ band, the power values at F7, F8, P3 channels(p<0.05) during the $PC_8-acupoint$ treatment significantly decreased. In ${\beta}(beta)$ band, the power values at F4, F8, P3 channels(P<0.05) during the PC8-acupoint treatment significantly decreased. In ${\delta}(delta)$ band, the power values at F7, F8, P3 Po2 channels(p<0.05) during the $PC_8-acupoint$ treatment significantly decreased. In ${\theta}(theta)$ band, the power values at F7, Fz, F4 F8, FTC1, FTC2, CP2, TT2, P3, Pz, Po2 channels(p<0.05) during the PC8-acupoint treatment significantly decreased. Conclusions : This results suggest that Electroacupuncture at the PC8 mostly affect the change on theta(11 channels) bands.

• Journal of Applied Biological Chemistry
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• 제53권1호
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• pp.31-36
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• 2010

고추 부산물의 활용을 위해 고추의 각 기관별 추출물에 대한 항산화와 QR 유도 활성을 측정하였다. 고추의 과실, 뿌리, 줄기, 잎을 각각 메탄올로 추출하여 분석한 결과, 고춧잎이 다른 기관에 비해 플라보노이드와 페놀성분이 높은 것으로 나타났다. DPPH 항산화 실험에서는 기관별로 큰 차이가 없었던 반면, ABTS 항산화 실험에서는 고춧잎이 다른 기관에 비해 유의적으로 높은 항산화능을 보였다. FTC와 TBA 실험에서 줄기와 고춧잎이 다른 기관에 비해 유의하게 높은 지질과산화 억제능을 나타냈다. QR 유도활성에서는 고춧잎, 뿌리, 줄기, 과실순으로 높았다. 고춧잎의 경우 $50-200\;{\mu}g/mL$ 농도에서는 다른 기관에 비해 높은 세포 성장 억제능을 보였다. 결론적으로 고춧잎은 다른 기관에 비해 항산화 활성과 QR 유도 활성이 높아 기능성소재로서의 활용가치가 높다.

• Korean Journal of Acupuncture
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• 제28권3호
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• pp.85-98
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• 2011

Objectives : The aim of this thesis is to examine the effect of acupuncture treatment at the GB37 on normal humans by using the power spectral analysis of the EEG. Methods : EEG (Electroencephalogram) power spectrum exhibits site-specific and state-related differences in specific frequency bands. In this thesis, the power spectrum was measured by the complexity. the 32 channels EEG study was carried out in the 13 subjects (12 males ; age=22.58 years old, 1 females ; 22 years old). Results : In the ${\alpha}$ (alpha) band, the power values at F7, F3, F4, F8, FTC2, C4, T4, CP1, CP2, TCP2, TT2, Pz, P4, Po1, Po2, O1, Oz, O2 channels (p<0.05) during the GB37-acupoint treatment were significantly changed. And in many channels were decreased. In the ${\beta}$ (beta) band, the power values at Cz, C4, T4, Tcp1, T6, Po1, O1, Oz, O2 channels (p<0.05) during the GB37-acupoint treatment were significantly changed. And in many channels were decreased. In the ${\delta}$(delta) band, the power values at Fp1, TT2 channels (p<0.05) during the GB37-acupoint treatment were significantly changed. And in many channels were decreased. In the $\theta$ (theta) band, the power values at Fp1, F8, FTC2, Pz channels (p<0.05) during the GB37-acupoint treatment were significantly changed. And in many channels were decreased. Conclusions : This results suggest that the acupuncture treatment at the GB37 significantly mostly change the power spectrum value on the alpha (18 channels), beta (9 channels) bands.

• Geomechanics and Engineering
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• 제12권3호
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• pp.441-464
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• 2017

The determination of the mixture parameters of stabilization has become a great concern in geotechnical applications. This paper presents an effort about the application of artificial intelligence (AI) techniques including radial basis neural network (RBNN), multi-layer perceptrons (MLP), generalized regression neural network (GRNN) and adaptive neuro-fuzzy inference system (ANFIS) in order to predict the unconfined compressive strength (UCS) of silty soil stabilized with bottom ash (BA), jute fiber (JF) and steel fiber (SF) under different freeze-thaw cycles (FTC). The dosages of the stabilizers and number of freeze-thaw cycles were employed as input (predictor) variables and the UCS values as output variable. For understanding the dominant parameter of the predictor variables on the UCS of stabilized soil, a sensitivity analysis has also been performed. The performance measures of root mean square error (RMSE), mean absolute error (MAE) and determination coefficient ($R^2$) were used for the evaluations of the prediction accuracy and applicability of the employed models. The results indicate that the predictions due to all AI techniques employed are significantly correlated with the measured UCS ($p{\leq}0.05$). They also perform better predictions than nonlinear regression (NLR) in terms of the performance measures. It is found from the model performances that RBNN approach within AI techniques yields the highest satisfactory results (RMSE = 55.4 kPa, MAE = 45.1 kPa, and $R^2=0.988$). The sensitivity analysis demonstrates that the JF inclusion within the input predictors is the most effective parameter on the UCS responses, followed by FTC.

• Asian Pacific Journal of Cancer Prevention
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• 제13권5호
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• pp.2175-2178
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• 2012

Purpose: Definite diagnosis of follicular thyroid carcinoma (FTC) is based on the presence of capsular or vascular invasion. To date, no reliable and practical method has been introduced to discriminate this malignant neoplasm from follicular thyroid adenoma (FTA) in fine needle aspiration biopsy material. Matrix metalloproteinase-2 (MMP-2), by degrading extracellular matrix, and caspase-3, by induction of apoptosis, have been shown to play important roles in carcinogenesis and aggressive behavior in many tumor types. The aim of this study was to examine expression of MMP-2 and caspase-3 in thyroid follicular neoplasms and to determine their usefulness for differential diagnosis. Method: Sixty FTAs and 41 FTCs were analysed immunohistochemically for MMP-2 and caspase-3. Result: MMP-2 was positive in 4 FTCs (9.8%), but in none of FTAs, with statistical significance (p= 0.025). Caspase-3 was positive in 30 (50%) of FTAs and in 27 (65.9%) of FTCs. Conclusion: Our results show MMP-2 expression only in FTCs and suggest that this protein may be a useful marker to confirm diagnosis of FTC versus FTA with 100% specificity and 100% predictive value of a positive test. We failed to show any differential diagnostic value for caspase-3 in thyroid follicular neoplasms.

• 동의생리병리학회지
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• 제22권1호
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• pp.115-119
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• 2008

This study was done to evaluate the antioxidant effect of Crataegi Fructus (CF) extract on the oxidative stress induced by reactive oxygen species (ROS), The human skin fibroblasts (Detroit 551) were cultured with various concentrations of hydrogen peroxide $(H_2O_2)$. The cytotoxicity of $H_2O_2-induced$ oxidative stress was performed by XTT assay for the cell viability according to the dose- and time-dependent treatment. For the protective effect of CF extract on $H_2O_2-mediated$ oxidative stress, cell viability, lactate dehydroganase (LDH) activity, and ferric thiocyanate (FTC) assay for the inhibitive activity of lipid peroxidation on CF extract were carried out. In this study, $H_2O_2-mediated$ oxidative stress was decreased cell viability dose-, and time-dependent manner and increased LDH activity compared with the control in these cultures. In the protective effect, CF extract increased cell viability and decreased LDH activity on $H_2O_2-mediated$ oxidative stress, especially, CF extract has antioxidant effect by the showing the inhibitive activity of lipid peroxidation by FTC assay. From these results, It is suggested that $H_2O_2-mediated$ oxidative stress was highly toxic, and also, CF extract showed the protective effect on $H_2O_2-mediated$ oxidative stress by showing the increased cell viability, decreased LDH activity and lipid peroxidation inhibition in these cultures.

• 한국의류학회지
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• 제34권2호
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• pp.345-356
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• 2010

This study investigates the present conditions of hospital clothes management. A survey was conducted with 72 respondents from 28 different hospitals in April and May 2009. Data were analyzed with descriptive statistics and correlations using PASW 17.0. The results were as follows: (1) Administrators, nurses, and outside specialists took part in the clothes management process. The administrators participated in the process of purchase determination. Nurses involved in the design, size selection, and outside specialists were responsible for routine management. (2) Most clothes were planned through the discussions between hospitals and manufacturers. Price was the most important element to determine the purchase of clothes. Size systems were various depending on the conditions of the hospital according to the number of beds. (3) Laundry duties were performed by the hospitals themselves or in specialized laundry plants. In addition, the hygienic condition of clothes management were satisfactory. (4) Patient gowns were evaluated positively, yet some complaints from patients were reported. (5) Various medical supplies were used and were uncomfortable related to textile and fitting problems. Future research themes are suggested based on these results.

• 정보보호학회지
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• 제18권2호
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• pp.76-86
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• 2008

인터넷을 통한 공공 및 민간 부분 서비스 제공이 활성화됨에 따라 이들 서비스를 제공받기 위해 사용자들은 자신의 개인정보를 서비스 제공자에게 제공하게 되고, 서비스 제공자들은 가입자들의 개인정보를 관리하기 위해 일반적으로 데이터베이스를 이용하고 있다. 최근 개인정보에 대한 중요도와 필요성이 증가함에 따라 정보보호 제품에 대해 일반 보안기능 및 신뢰성 평가뿐만 아니라 개인정보 소유자의 프라이버시가 보장되는지를 평가할 수 있는 평가기준 마련 필요성이 제기되고 있다. 본 논문에서는 OECD, 미국 FTC, 유럽연합 등 정보보호 선진국에서 제정한 프라이버시 보호원칙과 기존 DBMS 보안 요구사항을 함께 반영한 개인정보 DB 관리기술에 대한 보안 요구사항을 개발하였다. 개발된 보안 요구사항은 TTA 개인정보 생명주기 관리모델(안)의 생명주기 단계를 기준으로 각 생명주기 단계에서 수행되는 기능 특성에 따라DBMS 보안측면과 프라이버시 보호 측면을 함께 고려하여 작성되었다.