• The Transactions of The Korean Institute of Electrical Engineers
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• v.67 no.6
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• pp.738-744
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• 2018

This paper proposes a low cost hot swap operation circuit of a parallel operation power supply for servers. Hot swap function for server power system is essential in 24 hour operation system such as internet data center, server, factory and etc. Server power supplies used in internet data centers have two or more parallel operations with the hot swap operation. However, the cost of the power supply is high because the controller IC for hot swap operation is very expensive. Therefore, this paper proposes a parallel-operated power supply with a low-cost hot swap controller for servers. The proposed system can operate hot swap function by using discrete devices and reduce the cost by more than 50%. A 1.2kW prototype system is implemented to verify the proposed low cost hot swap controller.

• Journal of Oriental Medical Thermology
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• v.7 no.1
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• pp.1-13
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• 2009

Purpose: To evaluate the hot flush relief efficacy of Yiseontang-gami in climacteric women with hot flushes, a vasomotor symptom. Methods: The 20 subjects who signing on the clinical trial written consent by self-will is registered this clinical trial after decided suitable by selection and exception standard, after take a medical experiment and checkup according to clinical trial plan. Registered subject should valuated by settled schedule after take the testing medicine(Yiseontang-gami)during thirty-day. The evaluating indexes of this trial are hot flush VAS, hot flush frequency, hot flush consistence time, sweating VAS, palpitation VAS, sleep disturbance VAS, MRS, MENQOL, PGA. Results: The results were as follows 1. 4 subjects dropped out of the clinical trial and 16 subjects completed it. 2. After Yiseontang-gami treatment, hot flush VAS, hot flush frequent, sweating VAS, Palpitation VAS, sleep disturbance VAS improved significantly. 3. After Yiseontang-gami treatment, hot flush consistence time was not improved significantly. 4. After Yiseontang-gami treatment, blood test value were not different significantly. Conclusion: In this clinical trial we consider that Yiseontang-gami is suitable treatment for the hot flushes and related symptoms.

• Journal of Korean Academy of Nursing
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• v.40 no.6
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• pp.765-774
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• 2010

Purpose: The purposes of this study were to explain the phenomena of hot flashes in climacteric women by using Mexameter, Skin Thermometer, Corneometer, and Laser Doppler Perfusion Imager (LDPI) objectively and to identify the interrelation between the subjective and objective measurements of hot flashes by comparing the two as reported in retrospective questionnaires. Methods: The participants were one hundred women (45-60 yr) who were not currently on hormone therapy, and had reached hot flash scores of 10 or higher. Hot flashes were measured in a temperature and humidity controlled room for 7 hr from 10 am to 5 pm. Hot flashes were measured subjectively and recorded via the Hot Flash Diary Report. When participants felt the hot flashes, they were measured objectively by Mexameter, Skin Thermometer, Corneometer, and LDPI. Results: The frequency of hot flashes in participants ranged from 1 to 7 times. When hot flashes occurred in participants, the erythema, skin temperature, skin hydration, and blood perfusion showed statistically significant changes in all measurements. But, the subjective and objective measurements of hot flashes showed only weak correlations. Conclusion: Results indicate a need for future research with subjective and objective measuring instruments chosen depending variations identified for the study.

• The Journal of Korean Obstetrics and Gynecology
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• v.21 no.3
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• pp.75-89
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• 2008

Purpose: To evaluate the hot flush relief efficacy of Yiseontang-gami in climacteric women with hot flushes, a vasomotor symptom. Methods: The 20 subjects who signing on the clinical trial written consent by self-will is registered this clinical trial after decided suitable by selection and exception standard, after take a medical experiment and checkup according to clinical trial plan. Registered subject should valuated by settled schedule after take the testing medicine(Yiseontang-gami)during thirty-day. The evaluating indexes of this trial are hot flush VAS, hot flush frequency, hot flush consistence time, sweating VAS, palpitation VAS, sleep disturbance VAS, MRS, MENQOL, PGA. Results: The results were as follows 1. 4 subjects dropped out of the clinical trial and 16 subjects completed it. 2. After Yiseontang-gami treatment, hot flush VAS, hot flush frequent, sweating VAS. Palpitation VAS, sleep disturbance VAS improved significantly. 3. After Yiseontang-gami treatment, hot flush consistence time was not improved significantly. 4. After Yiseontang-gami treatment, blood test value were not different significantly. Conclusion: In this clinical trial we consider that Yiseontang-gami is suitable treatment for the hot flushes and related symptoms.

• The Journal of Korean Obstetrics and Gynecology
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• v.24 no.1
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• pp.87-98
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• 2011

Objectives: To evaluate the clinical use of Kupperman's Index, Menopausespecific quality of life questionnaire(MENQOL), Menopause Rating Scale(MRS) by comparison with the Subjective measures of hot flush. Methods: The participants were 107 women (45-60 yr) who were not currently on hormone therapy, and had reached hot flash scores of 10 or higher. The evaluating indexes of this trial are hot flush score, hot flush VAS, Hot flush consistence time, sweating VAS, Kupperman`s Index, Menopause-specific quality of life questionnaire (MENQOL), Menopause Rating Scale(MRS). Results: 1. The hot flush score, hot flush VAS, sweating VAS were significantly correlated with each other, but the Hot flush consistence time with no special relationship was found on Subjective measures of hot flush 2. The Kupperman's Index, Menopause-specific quality of life questionnaire (MENQOL) and Menopause Rating Scale(MRS) were significantly correlated with each other. 3. There was significant correlation between Subjective measures of hot flush and Menopause-specific quality of life questionnaire(MENQOL), Thus Menopausespecific quality of life questionnaire(MENQOL) is considered the most suitable on hot flush related research. Conclusions: There was significant correlation between Subjective measures of hot flush and Menopausal scale, thus the use of various indicators are needed for the assessment of climacteric symptoms.

• Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference
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• 1996.04b
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• pp.126-132
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• 1996

A laboratory scale hot strip rolling wear simulator(HRWS) was developed for the purpose of investigating the tribological phenomena occurred in production hot strip rolling mills. The HRWS' main parts are the electric heater, the mechanical descaler, tandem type 2-4Hi rolling mill stands, the cooling chamber, the tension controller and coiler. By simulating the tribelogical phenomena in rolling process at laboratory, wear patterns, cracks, cat-ear wear, black film, effect of hot rolling oil lubrication, etc. were reproduced, and discussed on the performace of simulator.

• Proceedings of the Korean Information Science Society Conference
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• 1999.10a
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• pp.444-446
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• 1999

컴포넌트 기반의 개발과 컴포넌트 개발에 대한 관심이 높아지면서 이를 위한 개발 방법론과 개발 도구들의 도입이 확산되고 있다. 또한 컴포넌트의 재사용 범위를 확장시키기 위해 컴포넌트 개발 시 나타나는 Hot Spot 처리를 위한 분석, 설계기법에 대한 관심이 높아지고 있다. 따라서 본 논문에서는 Hot Spot 처리시에 나타나는 의존적인 Hot Spot을 디자인하는 방법을 제시하고 그 방법을 적용하여 의존적인 Hot Spot을 디자인 할 때 발생되는 Hot Spot 간의 결합도 줄이고 디자인 모델의 가독성을 높인다. 본 논문에서는 디자인 모델링을 위한 표기법으로서 객체지향 모델링 기법인 (UML(Unified Modeling Language)를 이용하여 모델링한다.

• The Transactions of the Korea Information Processing Society
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• v.2 no.6
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• pp.985-994
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• 1995

In this paper, we propose two hot standby architectures which not only provide high system availability but also lose little data on fault occurrence. In order to evaluate the performance of the proposed hot standby architectures, the warm standby architecture. In order to evaluate the performance of the propose d hot standby architectures, the warm standby architecture which is made from the hot standby architecture by eliminating its synchronization unit is considered. After system unavailability for each architecture is computed by using the corresponding Markov state diagram, the results are compared and evaluated. As the results, in most cases, hot standby architectures have higher availability than warm standby architecture. Also, hot standby architecture with external synchronization unit always maintains a little higher availability than hot standby architecture with internal synchronization unit. Active set time and personnel recovery rate for each architecture have little effect on system availability. However, in the case that data recovery time is too long, system availabilities of hot standby architectures and warm standby architecture degrade rapidly. In this case, the performance degradation of hot standby architectures is severe, and system availabilities of hot standby architectures eventually become lower than system availability of warm standby architecture.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.21 no.1
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• pp.73-82
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• 1997

High temperature densification behaviors of alumina powder compacts were investigated under hot pressing and hot isostatic pressing. An alumina part of valve-head shape was fabricated under hot pressing and its forming process was simulated by finite element calculation. an alumina powder compact encapsulated by a stainless steel container was also densified under hot isostatic pressing. Inhomogeneous deformations during hot isostatic pressing due to the canning effect were observed experimentally and predicted by finite element analysis.

• Journal of Institute of Control, Robotics and Systems
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• v.13 no.10
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• pp.1007-1011
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• 2007

This paper proposes a novel tension estimation of interstand strip in looperless hot rolling process using SVR(Support Vector Regression). The quality of hot coil which is final product of hot rolling process is substantially decided by tension control of finishing rolling in hot rolling process. The fluctuation of the strip tension in conventional hot rolling process is controlled by the strip tension measured by an inter-stand looper. However, the looper can cause a motor trip and tension hunting in hot rolling process, therefore, alternative method is essential to replace it. In this paper, the mathematical modeling of tension mechanism is implemented to estimate the tension using the proposed SVR algorithm without looper in hot rolling process. The simulation results show a reliable estimation performance and a possibility of tension control using SVR technique.