• Journal of Home Health Care Nursing
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• v.16 no.2
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• pp.108-114
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• 2009

Purpose: This study utilized a nonequivalent control group pre-post test design to test the effects of foot massage on anxiety and sleep satisfaction response in preoperative patients undergoing abdominal surgery. Method: There were 40 subjects in the study (20 in the experimental group and 20 in the control group). The experimental group received foot massage once a day for 2 days before their operation. Data were analyzed with descriptive statistics including mean, percentage, Chi-square, and t-test. Results: There were significant differences between experimental group and control group in the level of the state anxiety, pulse rate, and sleep satisfaction. Conclusions: Foot massage was effective in reducing anxiety and improving sleep satisfaction in abdominal surgical patients before their operation. Thus, foot massage may be used as an independent nursing intervention. This intervention can be performed anywhere, requires no special equipment, is noninvasive, and does not interfere with patients' privacy.

• Proceedings of the KSR Conference
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• 2008.06a
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• pp.86-92
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• 2008

AGT system is a kind of light railway train. AGT system use of concrete track and rubber tire, so it can be reduce the noise and vibration, compare to the normal train system. And, the dynamic responses of normal bridge are influenced by the dynamic characteristics of bridge, the speed of vehicle and the surface roughness of railway. But the AGT system bridge is influenced not only the above facts but also the guiderail unevenness, because, AGT vehicle steered by guiderail. So, in this study, optimized service condition is suggested for the design and operation of AGT system, by the means of experimental study. The experiments are executed for PSC bridge with length of 30m, at the AGT test line in Kyongsan. The test results are compared and investigated according to the prominence. In the test result, the guiderail prominence influenced on the dynamic response of bridge. It shows a increase as compared with no guiderail prominence in the dynamic response value acceleration, displacement, stain.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.12 no.10
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• pp.894-900
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• 2000

The experimental study for performance improvement of aluminum/freon22 grooved heat pipe was carried out. Arterial wick was used for performance improvement of heat pipe. The experimental result was compared with screen covered grooved wick heat pipe. And also, performance test of grooved wick thermosyphon inserted straight wire in the center of grooved pipe was carried out. This result was compared with the performance test result of grooved wick thermosyphon. The operation limit of artery inserted grooved heat pipe was slightly extended, but thermal resistance of this heat pipe was twice as large as that of screen covered grooved heat pipe. In case of thermosyphon, the operation limit of grooved thermosyphon inserted straight wire in the center of grooved pipe was slightly extended, but thermal resistance was increased, comparing with that of the grooved thermosyphon.

• Aerospace Engineering and Technology
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• v.12 no.1
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• pp.182-188
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• 2013

This paper described flight safety center, flight safety information system(FSIS) and flight safety officer's mission and training in sequence and presented analysis's results and data processed in real-time during KSLV-I 3rd flight test. During flight safety center's operation for the 3rd flight test, monitoring of KSLV-I flight status was normally performed and the algorithms for flight safety calculations including the one for instantaneous impact point computations are also executed normally.

• Nuclear Engineering and Technology
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• v.50 no.6
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• pp.981-988
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• 2018

An experiment was performed for the OECD/NEA ROSA-2 Project with the large-scale test facility (LSTF), which simulated a steam generator tube rupture (SGTR) accident due to a double-ended guillotine break of one of steam generator (SG) U-tubes with operator recovery actions in a pressurized water reactor. The relief valve of broken SG opened three times after the start of intact SG secondary-side depressurization as the recovery action. Multi-dimensional phenomena specific to the SGTR accident appeared such as significant thermal stratification in a cold leg in broken loop especially during the operation of high-pressure injection (HPI) system. The RELAP5/MOD3.3 code overpredicted the broken SG secondary-side pressure after the start of the intact SG secondary-side depressurization, and failed to calculate the cold leg fluid temperature in broken loop. The combination of the number of the ruptured SG tubes and the HPI system operation difference was found to significantly affect the primary and SG secondary-side pressures through sensitivity analyses with the RELAP5 code.

• KEPCO Journal on Electric Power and Energy
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• v.4 no.2
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• pp.107-114
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• 2018

In recent years, ESS (Energy Storage System) has been widely used in various parts of a power system. Especially, due to its fast response time and high ramp rate, ESS is known to play an important role in regulating grid frequency and providing rotational inertia. As the number of installed and commercially operating ESSs increases, the reliability becomes an important issue. This paper introduces control schemes and presents its test method for grid-connected ESS for primary frequency regulation. The test method allows to verify the control operation in the individual operation mode and state. A validation of the method through actual ESS test in a electrical substation is presented in the case study section.

• Journal of Navigation and Port Research
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• v.30 no.1 s.107
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• pp.23-27
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• 2006

The training ships of maritime university in Korea are operated in the suitable schedule. However, there is no paper to grasp the education effect of the coastal navigation and ocean-going navigation terms. As the first step of these training education effects, this paper investigates the effect of training terms and provides the basic materials of the efficient training education. This paper used the 6 times test scores based on test book for 3rd officer as the assess method The results are as follows. (1)The higher credits scored in university times, the higher test scores gained in training ship. (2)After ocean-going navigation, the test score was the best.(3) The longer the training period is, the more the difference of individual capacity is.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2005.10a
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• pp.83-88
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• 2005

The training ships of maritime university in Korea are operated in the suitable schedule. However, there is no paper to grasp the education effect of the coastal navigation and ocean-going navigation terms. As the first step of these training education effects, this paper investigates the effect of training terms and provides the basic materials of the efficient training education. This paper used the 6 times test scores based on test book for 3/0 officer as the assess method. The results are as follows. (1)The higher credits scored in university times, the higher test scores gained in training ship. (2)After ocean-going navigation, the test score was the best(3) The longer the training period is, the more the difference of individual capacity is.

• Journal of information and communication convergence engineering
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• v.6 no.1
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• pp.43-46
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• 2008

This paper proposes an advanced test circuit for detecting the connectivity between a drum ring of laser printer and PCB. The detection circuit of charge sharing is proposed, which minimizes the influences of internal parasitic capacitances. The test circuit is composed of precharge circuit, analog comparator, level shifter. Its functional operation is verified using $0.6{\mu}m$ 3.3V/40V CMOS process parameter by HSPICE. Access time is100ns. Layout of the drum contact test circuit is $465{\mu}m\;{\times}\;117{\mu}m$.

• Journal of the Korean Institute of Telematics and Electronics C
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• v.35C no.8
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• pp.1-9
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• 1998

A new parallel test algorithm and a built-in self test (BIST) architecture are developed to test various types of functional faults efficiently in content addressable memories (CAMs). In test mode, the read oepratin is replaced by one parallel content addressable search operation and the writing operating is performed parallely with small peripheral circuit modificatins. The results whow that an efficient and practical testing with very low complexity and area overhead can be achieved.