• Journal of Acupuncture Research
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• v.25 no.1
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• pp.15-23
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• 2008

Objectives : The aim of our study was to demonstrate the clinical application of a diagnosis relating the 7-zone-diagnostic system and heart rate variability. Materials and Methods : Subjects were divided into two groups according to the factor AA form of the 7-zone-diagnostic system(VEGA-DFM722, VEGA, Germany). Subjects in group A showed a factor-AA red bar graph in which zone 2 was higher than the normal range, and zone 6 was lower than the normal range. Subjects in group B showed a factor-AA red bar graph in which zone 2 was lower than the normal range, and zone 6 was higher than the normal range. We investigated how to differentiate the index of heart-rate variability(HRV, LX-3202, LAXTHA, Korea) for each group. We did independent sample t-tests and evaluated the results of the HRV at the 5% significance level using SPSS 10.0 for Windows. Results : The differences of the MeanRR, MeanHRV, SDNN, complexity, HRV-index, RMSSD, SDSD, and pNN50 values between the groups was not significant. The differences of the Ln(TP), Ln(VLF), Ln(HF), LF/(LF+HF), LF/HF, norm LF, and norm HF values between the groups was also not significant. The differences were not significant, but generally the values of SDNN, complexity, RMSSD, SDSD, Ln(VLF), Ln(HF) and norm LF for group B were higher than those for group A, and the values of pNN50 and norm HF for group B were lower than those for group A. Conclusions : This study suggests that differences in the HRV values between the groups was not significant, but group B has a tendency to be healthier than group A because of stress. Accordingly, further study will be required.

• Journal of Acupuncture Research
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• v.24 no.6
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• pp.159-170
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• 2007

Objectives : The 7-zone-diagnostic system is a diagnostic device to predetermine bodily locations by measuring the energy of a living body. This study was to investigate the relation between the different patterns of Factor AA in a 7-zone-diagnostic system and clinical parameters. The purpose of this study is to relate Korean traditional medicine and western medicine using the data from the 7-zone-diagnostic system and the clinical parameters. Methods : This study was carried out with the data from some clinical parameters. We made two groups according to the Factor AA patterns of VEGA-DFM 722, the 7-zone-diagnostic system The Factor AA patterns of Group A named hyperenergy is all the red bar graphs that arehigher than the normal range. The Factor AA patterns of Group B named hypoenergy is all the red bar graphs that are lower than the normal range. After the data from clinical parameters corresponding with conditions of each group were selected, the data from clinical parameters among each group was analyzed statistically. Results : The values of Weight, GOT, r-GTP, Uric acid and BMI of Group A are higher than those of Group B. The values of Sodium and Phosphorus of Group A are lower than those of Group B. Conclusions : To conclude, it is thought that Group A has a heat-excess type but Group B has colddeficient type.

• Imaging Science in Dentistry
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• v.40 no.2
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• pp.63-68
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• 2010

Purpose : To compare the CT numbers on 3 cone-beam CT (CBCT) images with those on multi-detector CT (MDCT) image using CT phantom and to develop linear regressive equations using CT numbers to material density for all the CT scanner each. Materials and Methods : Mini CT phantom comprised of five 1 inch thick cylindrical models with 1.125 inches diameter of materials with different densities (polyethylene, polystyrene, plastic water, nylon and acrylic) was used. It was scanned in 3 CBCTs (i-CAT, Alphard VEGA, Implagraphy SC) and 1 MDCT (Somatom Emotion). The images were saved as DICOM format and CT numbers were measured using OnDemand 3D. CT numbers obtained from CBCTs and MDCT images were compared and linear regression analysis was performed for the density, $\rho$ ($g/cm^3$), as the dependent variable in terms of the CT numbers obtained from CBCTs and MDCT images. Results : CT numbers on i-CAT and Implagraphy CBCT images were smaller than those on Somatom Emotion MDCT image (p<0.05). Linear relationship on a range of materials used for this study were $\rho$=0.001H+1.07 with $R^2$ value of 0.999 for Somatom Emotion, $\rho$=0.002H+1.09 with $R^2$ value of 0.991 for Alphard VEGA, $\rho$=0.001H+1.43 with $R^2$ value of 0.980 for i-CAT and $\rho$=0.001H+1.30 with $R^2$ value of 0.975 for Implagraphy. Conclusion: CT numbers on i-CAT and Implagraphy CBCT images were not same as those on Somatom Emotion MDCT image. The linear regressive equations to determine the density from the CT numbers with very high correlation coefficient were obtained on three CBCT and MDCT scan.

• Proceedings of the Korean Information Science Society Conference
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• 2005.11a
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• pp.433-435
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• 2005

본 연구에서는 차세대 인터넷 환경의 주요 특징 중 하나인 이기종 네트워크가 혼재되어 있는 상황하에서 핸드오프가 일어나는 경우 여러 TCP 버전들(Newreno, Sack, Westwood, Vegas)이 겪게 되는 성능 변화를 분석하였다. 큰 대역폭의 네트워크와 작은 대역폭의 네트워크를 구성하여 실험해 본 결과 하부 계층의 핸드오프 지연이 없는 이상적인 상황에서도 대부분의 TCP들이 성능 저하를 겪었다. TCP 버전들 중 Vegas가 대역폭이 커지는 경우와 작아지는 경우 모두에서 가장 좋은 성능을 보였다.

• Proceedings of the KIPE Conference
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• 2003.07a
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• pp.128-132
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• 2003

This paper deals with the development of IGBT stacks for cost reduction. One stack is consist of 4 IGBTS in parallel. In the high- and mid-power converters, IGBT stacks are more suitable than single IGBTS in the aspects of total cost of semiconductor devices, time for purchasing, maintenance, radiation of heat, size of surge absorber and harmonic filter, frequency characteristics, and etc.. Problems accompanied by parallel construction are studied and solved. Economical efficiency is discussed and field tests with 100kVA UPS are tarried out to verify the validity of the developed IGBT stacks.

• Proceedings of the Korean Institute of Intelligent Systems Conference
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• 2000.11a
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• pp.157-160
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• 2000

This paper deals with the fuzzy modeling for the complex and uncertain system in which conventional and mathematical models may fail to give satisfactory results. mGA(messy Genetic Algorithm) has more effective and adaptive structure than sGA with respect to using changeable-length string and VEGA(Virus Evolution Genetic) Algorithm) can search the global and local optimal solution simultaneously with reverse transcription operator and transduction operator. Therefore in this paper, the optimal fuzzy model is obtained using Virus-messy Genetic Algorithm(Virus-mGA). In this method local information is exchanged in population so that population may sustain genetic divergence. To prove the surperioty of the proposed approach, we provide the numerical example.

• Journal of the Korean Mathematical Society
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• v.37 no.6
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• pp.1071-1084
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• 2000

We show that a weak solution of the Cauchy problem for he nonlinear Schrodinger equation, {i∂(sub)t u + ∂$^2$(sub)x u = f(u,u), t∈(-T,T), x∈R, u(0,x) = ø(x).} in the negative solbolev space H(sup)s has a smoothing effect up to real analyticity if the initial data only have a single point singularity such as the Dirac delta measure. It is shown that for H(sup)s (R)(s>-3/4) data satisfying the condition (※Equations, See Full-text) the solution is analytic in both space and time variable. The argument is based on the recent progress on the well-posedness result by Bourgain [2] and Kenig-Ponce-Vega [18] and previous work by Kato-Ogawa [12]. We give an improved new argument in the regularity argument.

• Journal of Chest Surgery
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• v.18 no.1
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• pp.13-18
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• 1985

Cortriatriatum is rare congenital heart disease characterized by the presence of a fibromuscular diaphragm that subdivides the left atrium into a proximal or "accessory" and a distal or "true" left atrial chamber. A 15 year old girl with cortriatriatum underwent surgical correction at the department of Thoracic and Cardiovascular Surgery, Soonchunhyang College in November, 1984. This case was preoperatively diagnosed as a single atrium with functional tricuspid regurgitation But on operation, we found that there were transverse septum in the left atrium through large ASD, low chamber receives the pulmonary veins, and the upper chamber gives rise to the left atrial appendage and leads to the mitral valve. And the anomalous membrane has no fenestrations. We excised completely the anomalous septum, reconstructed atrial septal defect with dacron patch and performed the tricuspid annuloplasty with DeVega method. Postoperative course was uneventful during follow up, during follow up.

• Proceedings of the KIEE Conference
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• 2008.10b
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• pp.544-545
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• 2008

무선 통신 기술의 발달로 최근 무선 device 들로 이루어진 ad-hoc network이 주요 issue가 되고 있으며, ad-hoc network에서의 성능이 중요한 관심사가 되고 있다. 그러나 유선망에 최적화되도록 설계된 TCP 는 무선망이 가지는 링크의 불안정함으로 인한 손실을 네트워크 혼잡에 의한 손실로 인식하여 혼잡 제어 메커니즘이 수행함으로써 전송률을 줄이게 되므로 전체적으로 네크웍의 성능이 저하되는 문제점을 가진다. 본 논문에서는 무선망에서 TCP 성능을 향상시키기 위한 새로운 congestion algorithm을 제안하고 그 성능을 평가하였다. 성능 확인 결과 기존 TCP-vegas에 비해 더 나은 성능을 보임을 알 수 있다.

• Journal of the Korean housing association
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• v.13 no.6
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• pp.11-20
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• 2002

The purpose of this study is to investigate the performance level of family events, the events places where the events occur. The subjects of 169 households were selected in Jinju city and data were gathered through a questionnaire method. The data were analyzed by the SPSS package program. The major findings are as follows; 1) Most of the families perform the majority of events except lpchun (the first day of spring), the vernal Equinox Day, the Autumnal Equinox Day, the Vega festival Day, Chilsuk, and the Respect-for-the-Aged Day. 2) Birthday parties score to the highest of all family events. 3) In general, the Lunar New Year's Day, the Full Moon Harvest Day, the ancestor worship ceremony, the 15th of January (in lunar calendar), the feast of a hundred day-old baby among lifetime ceremonies, family members'birthdays, housewarming parties among the other general celebrations, and Parents Day among memorial days are held in their homes. 4) The socialized celebration of the following family events is increasing: the first birthday party, banquets for parents'60th birthday, Christmas, and wedding anniversaries.