• Transactions of the Korean Society for Noise and Vibration Engineering
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• v.13 no.10
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• pp.767-776
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• 2003

The theoretical method is developed to Investigate the nitration characteristics of the combined cylindrical shells with an annular plate joined to the shell at any arbitrary axial position. The structural coupling between shell and plate is simulated using two types of artificial springs a translational spring is introduced for translational coupling and a rotational spring is used for rotational coupling. The springs are continuously distributed along circumferential direction. Using the Rayleigh-Ritz method the natural frequencies and mode shapes of the combined shell with an annular plate examine. The effect of Inner-to-outer radius ratio, axial position of annular plate and length-to-radius ratio of shell on vibration characteristics of combined cylindrical shells is studied. The theoretical results are verified by comparison with FEM results.

• Journal of Power Electronics
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• v.2 no.1
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• pp.11-18
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• 2002

The development of the solar and the wind energy is necessary since the future alternative energies that have no pollution and no limitation are restricted. Currently MW Class power generation system has been developed, but it still has a few faults with the weather condition. In order to solve these existing problems, combined generation system of photovoltaic and wind power was suggested. It combines wind power energy and solar energy to have the supporting effect from each other. However, since even combined generation system cannot always generate stable output with everchanging weather condition, power storage apparatus that uses elastic energy of spiral spring to combined generation system was also added for the present study.

• Journal of Mechanical Science and Technology
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• v.18 no.8
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• pp.1418-1427
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• 2004

Combined formulation developed for the fluid-particle mixture is introduced to simulate the biocube-fluid mixture flow, which is utilized for sewage disposal. Some tricky boundary conditions are introduced in order to simulate the effect of screen wall and air bubble, which is injected from the bottom of sewage reservoir. It has been shown that a circulated flow pattern, which was observed in experiment, is reproduced from the present numerical simulation. Furthermore, the effect of biocube density on the distribution pattern of biocube is also studied. It has been shown that a biocube whose density is slightly smaller than that of surrounding fluid or neutrally buoyant one are optimal for the uniform distribution of biocube.

• Biomolecules & Therapeutics
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• v.5 no.3
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• pp.272-277
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• 1997

The effect of nonionic surfactant(polyoxyl 40 hydrogenated castor oil, PHCO), a common solubi-lizer, on the solubility of silymarin in the combined preparation containing ursoseoxycholic acid(UDCA) and silymarin was investigated in vivo using HPLC. The solubility of silybin, a major component of silymarin, was enhanced by increasing the amount of PHCO. The effect of PHCO on bioavailability was also evaluated in rats. The bioavailability was calculated by silybin content in bile juice that was excreted for 24 hr after oral administration. It was found that the bioavailability of silymarin containing PHCO was significantly increased compared to that of control. These results suggest that PHCO may improve the solubility and bioavailabilty of silymarin when it is combined with UDCA and silymarin.

• Journal of Pharmaceutical Investigation
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• v.5 no.4
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• pp.32-37
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• 1975

The intentional test of the clinical test on the mouse, which are orally administered salicylamide combined with chlorpheniramine maleate were made by writhing syndrome method of 0.7% acetic acid-saline solution and following effects were found. 1) The cross-over test of writhing syndrome method have intention in case of three days rest after the first examination. 2) The most active rate of salicylamide by administration combined with chlorpheniramine maleate is salicylamide 20mg/kg: chlorpheniramine maleate 20mg/kg (1:1) 3) The most active range of chlorpheniramine maleate used for assistant action of salicylamide is $15mg/kg{\sim}20mg/kg$

• Transactions of the Korean hydrogen and new energy society
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• v.34 no.6
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• pp.698-711
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• 2023

Consequence analysis using an ALOHA program is conducted to calculate the accidental impact ranges in the cases of hydrogen leakage, explosion, and jet fire in a hydrogen fueled combined cycle power plant. To evaluate the effect of weather conditions and topographic features on the damage range, ALOHA is executed for the power plants located in the inland and coastal regions. The damage range of hydrogen leaked in coastal areas is wider than that of inland areas in all risk factors. The obtained results are expected to be used when designing safety system and establishing safety plans.

• Steel and Composite Structures
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• v.35 no.3
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• pp.385-404
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• 2020

Since the scaffold is composed of modular members, the total height of multi-story scaffolds does not often meet with the headroom of construction buildings. At this time, other supporting members need to be set up on the top of scaffolds. However, the mechanical behaviors of the combined system of scaffolds and other supporting members have seldom been discussed. This study explores the stability of the combined system of scaffolds and shores. The loading tests conducted in the laboratory show that the critical load of the combined system of two-story scaffolds and wooden shores is about half that of the three-story scaffold system with the same height. In the failure of both the "scaffold system" and the "combined system of scaffolds and shores' after loading, the deformation mainly occurs in the in-plane direction of the scaffold. The outdoor loading test shows that no failure occurs on any members when the combined system fails. Instead, the whole system buckles and then collapses. In addition, the top formwork of the combined system can achieve the effect of lateral support reinforcement with small lateral support forces in the outdoor loading test. This study proposes the preliminary design guidelines for the scaffolding structural design.

• Journal of the Korean Society of Physical Medicine
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• v.19 no.1
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• pp.119-129
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• 2024

PURPOSE: The purpose of this study was to examine the effectiveness of a low-intensity combined exercise program on daily physical fitness parameters such as balance, flexibility, muscle strength, and fear of falling of elderly women in the community. METHODS: This study assigned 30 elderly women randomly into two groups: The control and experimental groups. The control group (n = 15) underwent routine gait. The experimental group (n = 15) underwent the low-intensity combined exercise. The exercise program in this study comprising combined exercise, including balance, flexibility, muscle strength training, and the exercise program using props was conducted twice a week for 8 weeks. RESULTS: The average age of the control and experimental groups was 77.27 years and 78.33 years, respectively. There were significant differences in static balance (t = -4.167, p < .001), dynamic balance (t = 2.463, p < .001), (t = -3.870, p < .001), (t = -2.262, p < .001), (t = -5.732, p < .001), (t = -6.573, p < .001), and fear of falling (t = -5.129, p < .001). CONCLUSION: The results show that low-intensity combined exercise is an effective intervention that improves physical health fear of falling in older women. The combined exercise program was found to be more effective in terms of physical function and fall-related psychological function compared to the control group that only walked.

• KSBB Journal
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• v.26 no.3
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• pp.260-265
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• 2011

This study aimed to examine the treatment effect of Muraenesox cinereus extract product combined with high frequency on men's damaged skin. The subjects were treated by a product containing M. cinereus extract combined with high frequency therapy for six weeks and tested in skin condition. First, for moisture level change, there was no significant difference between the control group treated only by high frequency therapy and the experimental group treated by a M. cinereus extract product combined with high frequency therapy. But the subjects who increased consistently in moisture level in the cheek and chin were more common in the experimental group. Second, for an oil level, prominently high increase was found in both the control group and the experimental group. Finally, for a rough level, while there was little difference in the control group between immediately after peeling and after six weeks, high improvement effect on a curve was found in the experimental group. Based on this result, cosmetics using M. cinereus extract may have a positive effect on men's skin which is exposed to several stress factors. Accordingly, this result will contribute to developing men's functional cosmetics.

• Korean Journal of Weed Science
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• v.18 no.4
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• pp.286-294
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• 1998

This study was carried out to evaluate the interaction effect between molinate(S-ethyl N,N-hexamethylene-thiocarbamate) and simetryn(N,N'-diethyl-6-(methythio)-1,3,5-triazine-2,4-diamine) on weed bioefficacy and rice phytotoxicity in green house and paddy field. Combined application of molinate and simetryn showed synergistic herbicidal effect to Echinochloa crus-galli and additive herbicidal effect to Bidens tripartita, However, it showed synergistic phytotoxicity to rice. Combined application of molinate and simetryn reduced the flooding period desirable for controlling Echinochloa crus-galli by about 2~4days as compared to single application of molinate. It was concluded that the optimum combination of molinate and simetryn was 150g and 9g to 18g a.i./10a, respectively in viewpoint of bioefficacy and phytotoxicity.