• Journal of Korea Game Society
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• v.14 no.1
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• pp.69-80
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• 2014

The government enacted shutdown policy in the fall of 2011 to prevent game addition of youth. Now shut down policy has been implemented about 3 years. We surveyed gamers' and non-gamers' perception about shut down system in 3 years. So this article tried to analysis the perception change of gamers and non-gamers about shut down policy. In result of this analysis, the evaluations of shutdown policy has decreased. Both gamer and non-gamer have the thought against the shot down policy. Among 2011-2012, non-gamer's perception on shut down policy had not changed much. But among 2012-2013, non-gamers' perception as well as gamer's perception has changed against shut down policy. This result showed that we should re-consider the effect and necessity of the shut down policy and whether the government should maintain the shut down policy.

• 한국신재생에너지학회:학술대회논문집
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• 2007.11a
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• pp.192-192
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• 2007

• 한국신재생에너지학회:학술대회논문집
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• 2008.05a
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• pp.29-32
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• 2008

Testing was conducted to determine the performance of a residential fuel cell system when subjected to DSS and WSS operation, especially for start-up and shut-down characteristics. In terms of start-up time, it took about 70min to start output power generation and stably to reach 1kW at cold start. Measurement of the characteristics of heat and power generation were carried out at start-up and shut-down time. Fuel gas is used for heating both reformer and stack from start-up to the beginning of power generation. In terms of start-up and shut-down characteristics, it was important to control the reformer temperature precisely. The average output water temperature during the rated output operation(960W) was $63.2^{\circ}C$ constantly. The results of the investigation are being used to develop a new test protocols for residential fuel cell system.

• Journal of Information Technology Services
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• v.11 no.2
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• pp.93-106
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• 2012

Recently, a Game Shut-down policy, partially limiting the time for the use of online game service, has been implemented in order to protect the youth from the excessive use of games by limiting their access to games in the late hours, based on the serious side effects of online games on the youth. However, the effectiveness of a Game Shut-down policy becomes a social issue. Thus, this study aims to investigate the alternative policies through the levels of the communications suggested by the theory of excellence, for the successful implementation of the policy. As a result of the study, the government and students, the recipient of those policies, need to strengthen their two-way communication in respect of the Game Shut-down policy, breaking from the existing views on the perception. The problem is that the current government's way of the communication for the Game Shut-down policy is one-way and it is aiming at achieving the objectives only. Thus, the communication in this manner will cause the side effect. 'the opportunistic violation of the system in the future', even if the students seemingly accept the system. Two-way communication will enhance the motivation for the voluntary acceptance of the system and lower the motivation for the opportunistic violation of the system. Thus, the government needs to strengthen two-way communication in the future.

• Journal of Korea Game Society
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• v.13 no.4
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• pp.61-72
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• 2013

This study explored the relationships between media use and attributions of negative ffects of video games on attitudes toward Shut-down system. To prevent the youth from game addiction and secure a right to sleep for the youth, Shut-down system ahs been enacted since the fall of 2011. Interview survey revealed that females, the aged, those who use more news products, those who perceive more negative effects of games, and those who attribute the negative effects of game on government would have more positive attitudes toward the shut-down system.

• Proceedings of the KIPE Conference
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• 2006.06a
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• pp.254-256
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• 2006

A Novel way to support typical Thermal Shut Down(TSD) circuit is proposed. In power ICs, on-time or on-duration is the key factor to anticipate an abrupt increase of internal temperature. Such an abrupt raise of the temperature can cause TSD circuit cannot protect on proper time due to the temperature detection delay come from the physical distance or the imperfect coupling between heat sources and detector. The proposed circuit checks the duty ratio touched their maximum or not in every cycle. Once duty ratio touches the maximum duty, new circuit generates the warning signal to the TSD circuit and lowers pre-determined temperature for shut down to compensate the detection delay. The novel circuit will be analyzed to the transistor level and checked the validity by simulation.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.22 no.3
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• pp.408-415
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• 1998

This study presents experimental results on the shut-down and start-up characteristics of a residential split-system air-conditioner with capillary tube, using R410A as a R22 alternative refrigerant. During shut-down, the transient characteristics are evaluated by measuring the high side and low side pressures and temperatures of the system. The dynamic behavior of the system after start-up is also investigated at the high temperature cooling test condition. All experiments are performed in psychrometric calorimeter. The cooling capacity, power consumption, dehumidification capacity and cycle characteristics after start-up are analyzed.

• Proceedings of the IEEK Conference
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• 2003.07c
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• pp.2927-2930
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• 2003

This paper has been studied the ballast for multiple lamps. Many fluorescent lamps are demanded in where industrial buildings and public buildings. Using the proposed ballast for multiple lamps, we can decrease the cost and the space for installing. Also in the paper, the protection circuit is introduced for over voltage and current. The general problem of the ballast for multiple lamps is to shut down the ballast circuit in the ease of one abnormal lamp. But the proposed method is not shut down all the circuit even if one lamp is in an abnormal condition.

• 한국정보디스플레이학회:학술대회논문집
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• 2007.08a
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• pp.273-276
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• 2007

A natural graphite heat spreader increased the upper operating temperature limit of a CCFL backlit LCD television. A 0-80W heat source was used to simulate additional electronics. Without the heat spreader, internal circuitry shut-down at ${\sim}30;$ no shut-down occurred above 80W with a heat spreader. Additionally, brightness, temperature uniformity, and operating ranges were improved, verified by environmental chamber performance testing at various ambient conditions.

• 전기의세계
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• v.14 no.5
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• pp.1-7
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• 1965

Using "Yonsei$^{101}$ Analog Computer" the poisoning of the Xenon$^{135}$ in a thermal homogeneous nuclear reactor is analyzed. The simulator is constituted of high gain D.C. operational amplifiers and operational impedances. During the nuclear reactor operation, the Xenon poisoning increases against time until the equilibrium state reaches. After the reactor shut-down, it increases remarkably until the maximum value and then decreases. The simulated curves agree with theoretical values satisfactorily. The accuracy of the analog computer solution is 0.4387 per cent during the nuclear reactor operation and 6.7 per cent after the nuclear reactor shut-down respectively.pectively.