• Journal of Pharmacopuncture
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• v.10 no.1 s.22
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• pp.101-107
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• 2007

Objectives : This study was aimed at investigating liver protection mechanism of Cultivated Ginseng and Cultivated Wild Ginseng of Korean and Chinese by inducing liver toxicity through $CCl_4$ and t-BHP in mice and evaluated serological findings. Methods : Experiment groups was categorized into untreated normal group, treated control group, and orally administered Cultivated Ginseng and Cultivated Wild Ginseng of Korean and Chinese experimental groups. At the termination of experiment, gross examination of the liver as well as Total bilirubin, AST, and ALT contents in the serum were evaluated. Results : 1. In the $CCl_4$ induced acute hepatotoxicity test, total bilirubin, AST and ALT didn't show significant differences between the control and experimental groups. 2. In the t-BHP induced acute hepatotoxicity test, total bilirubin, AST and ALT didn't show significant differences between the control and experimental groups. Conclusion : Taken together, Cultivated Ginseng and Cultivated Wild Ginseng of Korean and Chinese cannot be effectively used for recovering the liver functions in acute hepatotoxicity tests using $CCl_4$ and t-BHP. Further researches, for example treated long period, must be tried to verify the efficacies.

• Journal of Electrical Engineering and Technology
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• v.10 no.5
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• pp.2062-2069
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• 2015

In the series hybrid active power filter (SHAPF) with magnetic flux compensation (MFC), the system current oscillate in the experimental results when adding the same phase harmonic current command in current control block. This condition endangers the security of the SHAPF. Taking the digit period average arithmetic as example, this paper explains the inter-harmonics current oscillation in the experiment. The conclusion is that the SHAPF is unstable to the inter-harmonics current in theory. Limited by the capacity of the inverter, the system current and the inverter output current do not increase to infinite. At last, some methods are proposed to solve this problem. From the practical viewpoint, the voltage feed-forward control is easy to achieve. It can suppress the current oscillation problems, and also improve the filtering effect. The feasibility of the methods is validated by both the emulation and experiment results.

• Journal of Microbiology and Biotechnology
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• v.13 no.1
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• pp.85-89
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• 2003

The difference in the thermotolerance between Saccharomyces cerevisiae KNU5377 and ATCC24858 was compared by assaying the amounts of trehalose accumulated under growth and heat shock conditions. Both strains exhibited similar trehalose accumulation during the growth period, but an intrinsic thermotolerance was much higher in KNU5377 than in the control strain. This result implied that some strain-specific characteristics of KNU5377, other than trehalose accumulation, primarily were responsible fur its higher intrinsic thermotolerance. Heat shock at $43^{\circ}C$ for 90 min to the exponentially growing cells resulted in the maximum level of trehalose In both strains. Trehalose accumulated at least twice more in KNU5377 by the heat shock than in the control, due to the maintenance of its neutral trehalase activity even after the heat shock. Consequently, the Increase of acquired thermotolerance in both strains correlated with an increase in the trehalose content in each strain. In conclusion, KNU5377 exhibited a well-modulated trehalose-related mechanism to accumulate more trehalose by means of maintaining neutral trehalase activity after heat shock than the control strain, thereby contributing to its acquired thermotolerance.

• Journal of The Korean Society of Agricultural Engineers
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• v.47 no.3
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• pp.15-25
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• 2005

Ninety tow percent of over 1,800 gate controlled dams in Korea are classified as small dams. The primary purpose of these small dams is to supply irrigation water. Therefore, while large dams can store as much as 80 percent of precipitation and thus are efficient to control flood, small dams are often lack of flood control function resulting in increased susceptibility drought and flood events. The purpose of this study is to develope a storage management model for irrigation dams occupying the largest portion of small dams. The proposed Storage Management Model (STMM) can be applied to the Seongju dam for efficient management. Besides, the operation standard is capable of analyzing additional available water, considering water demand and supply conditions of watershed realistically. And the model can improve the flood control capacity and water utilization efficiency by the flexible operation of storage space. Consequently, if the small dams are managed by the proposed Storage management model, it is possible to maximize water resources securance and minimize drought and flood damages.

• Nutritional Sciences
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• v.6 no.2
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• pp.106-112
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• 2003

To investigate the association between breast cancer risk and nutrient intake in Korean women, a case-control study was carried out. Incident cases (n=224) were identified through cancer biopsy between february 1999 and December 2000 at two university hospitals in Seoul. Hospital-based controls (n=250) were selected from patients in the same hospitals, during the same periods. food intake was investigated with semi-quantitative food frequency questionnaire (98 items) by a trained dietitian. Subjects were asked to indicate the average intake, for a 12-month period of three years prior to the baseline phase. In this study, no apparent association was found between fat intake level and breast cancer risk. High fiber intake showed a significant inverse association only among premenopausal women. In terms of antioxidant vitamins, $\beta$-carotene and vitamin C among premenopausal women and vitamin C intake among postmenopausal women was significantly associated with a decreasing risk of breast cancer. A protective effect of high calcium consumption was observed among postmenopausal women. In conclusion, our findings support epidemiological evidence that antioxidant vitamin intake could lower the breast cancer risk in Korea.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.6
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• pp.1353-1360
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• 2009

This study examines the effects of internal control system and Analysis of characteristics and Earning management in Vulnerable Cooperation. During research period 2005${\sim}$2007, Purpose of this study is to examines whether financial characteristics has exist or not. Second, Earning management also. As a result of analysis are as follows, First T-test and logistic regression has found explanatory with stastical significance about CURRENT, RNPS, and DEPT. Second, DA of Vulnerable Cooperation is significantly higher than Normal cooperation.

• Proceedings of the KIEE Conference
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• 2000.11d
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• pp.765-768
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• 2000

Linearization of the biped dynamic equations and design of linear controller for the linearized equations are studied in this paper. The biped robot with inverted pendulum type trunk, used to stabilize the dynamic balancing of the biped robot during dynamic walking period, is modelled with 14 DOF and simulated. Despite of well defined linear control theories so far, the linear control methods was limited to the applications for a walking robot, because they have been inherently strong nonlinear properties, such as a modeling parameter uncertainties, external forces as noise, inertial and Coriolis terms by three dimensional modeling and so on. To linearize the nonlinear equations of motion of biped robot on MIMO and time varying linear equations of motion, 1st order Taylor series is used to formulate the linear equation. And a 2nd order numerical perturbation method Is used to approximate partial differential equations. Using the linearized equations of motion, a linear controller is designed by pole placement method with feed forward compensation. Using the obtained linearized equations and linear controller, the continuous walking simulation is performed.

• Journal of Korean Academy of Nursing
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• v.31 no.6
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• pp.1044-1054
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• 2001

The purpose of this study was to develop on east-west nursing intervention program. This study was conducted to identify the effectiveness of using facial meridian points for massage nursing intervention on the recovery of facial paralysis for 46 patients (22 for experimental group). All had suffered from strokes, and were also admitted to the division of oriental medicine in K University Hospital. Method: Data was collected from February 1st to December 31st of 2000. This study used a quasi experimental, non-equivalent control group pre-test and post-test design. The recovery of facial paralysis was measured by the difference between left and right facial length, observation and self report on a seven point scale, and facial discomfort by a facial scale after 6-7 facial massages in a two week period. Data was analyzed using the SPSS package program with x2 and t test. Result: The result of this study are as follows; The experimental group who received the facial meridian massage showed higher scores in recovery of facial paralysis (t=2.72, p=.009), and a smaller difference between left and right facial strength than those in control group (t=2.26, p= .29). The discomfort of the facial area in the experimental and control group showed no significant differences. Conclusion: These findings indicate that a facial meridian points massage could be an effective nursing intervention to the recovery of facial paralysis. This study contributes in developing an east-west nursing intervention with the oriental meridian theory and western massage therapy.

• Journal of Korean Academy of Nursing
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• v.36 no.5
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• pp.701-709
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• 2006

Purpose: The purpose of this study was to examine the effects of 'Logotherapy with Exercise' on the meaning of life, ego integrity and IADL's in the Elderly. Method: This quasi-experimental study was designed for a nonequivalent control group repeated measurement study. This study was done from Oct. 13, 2004 to Dec. 18. 2004. The subjects were between the ages of 65 to 75, who were literate in Korean and able to communicate and participate in physical exercise without any discomfort. The experimental group was 25 subjects and the control group was 26. The 5-week 'Logotherapy with Exercise' program was given to the experimental group. Data was analyzed by X$^2$, t-test, ANCOVA, ANOVA, and post-hoc comparison by Bonferroni correction with the SPSS/WIN 12.0. Results: The experimental group had a greater difference in meaning of life, ego integrity and IADL's than the control group. The experimental group had differences in changes in meaning of life, ego integrity and IADL's during time period. Conclusion: 'Logotherapy with Exercise' can be recommended as an effective nursing intervention for the elderly.

• Journal of Korean Academy of Nursing
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• v.41 no.6
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• pp.805-813
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• 2011

Purpose: The purpose of this study was to examine the effectiveness of an interpersonal relationship program on interpersonal relationships, self-esteem, and depression in nursing students. Methods: This was a quasi-experiment with a nonequivalent control group pre-posttest design. Sixty-four nursing students participated in the study with 31 in the experimental group and 33 in the control group. They were from 3 different colleges of nursing located in Seoul. The interpersonal relationship program was held 10 times over 10 weeks, taking 90 minutes per session. The interpersonal relationship change scale developed by Schlein and Guemey, Rosenberg's self-esteem scale, and CED-S for depression were the instruments used in the study. The data collection period was from January 4 to March 8, 2011, and the collected data were analyzed with SPSS 14.0 using the $X^2$-test, t-test, and paired t-test. Results: The results showed a significant difference between the experimental group and the control group in terms of the degree of interpersonal relationships, self-esteem, and depression. Conclusion: The results indicate that interpersonal relationship programs have positive effects for improving interpersonal relationships and self-esteem, and decreasing depression in nursing students.