• Journal of Korea Multimedia Society
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• v.13 no.5
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• pp.674-683
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• 2010

For the purpose of color reproduction under standard viewing conditions, recently, color display devices have developed for the colorimetric color reproduction. However the real viewing condition of color display devices is quite different from that. Therefore, it is very important for reproduced colors viewed under real conditions to match the color appearance under standard situations. There are various models that can be used to reproduce corresponding colors considering the chromatic adaptation of the human visual system. However neutral point or chromatic adaptation for the luminance level is not enough. In this paper, we propose a model that find adapting white points for the variations of the luminance levels under the same illuminant. This model is modeled by the proportion of Euclidian distance for luminance level. It is the adapting white function of the sigmoid type for surround luminance level. In the model, the optimal coefficients are obtained from the Hunt's experimental result. It is applied in the chromatic adaptation model using the neutral point of the various viewing conditions. And the neutral point can be used as the theoretical standard which determines the reference white of the color display devices.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2011.06a
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• pp.269-271
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• 2011

우리나라에서 사용하고 있는 표준형 부표류 중 스파부이는 등부표에 비하여 이출거리가 적고 항만 입출항로 및 협수로에서의 항로표시 기능은 좋은 편이나 강조류나 조차가 큰 해역등에서는 설치운영이 곤란한 실정이다. 이러한 스파부이의 장점을 유지하면서 단점을 보완하는 조위 순응형 스파부이의 개발이 절실한 시점이며, 이러한 항로표지의 요구를 만족하기 위하여 본 연구에서는 조위 순응형 스파부이를 개발하기 위한 전 해역의 환경조건을 검토하여 실제 해역에 적용가능한 스파부이의 구조형식을 제안하였다.

• Proceedings of the Korean Information Science Society Conference
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• 2011.06b
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• pp.255-257
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• 2011

본 논문은 스마트폰 환경에서 만성질환자의 약복용 순응률을 향상시키기 위한 앱을 모델링하고 구현하였다. 이 앱은 일상생활을 하면서 장기간 규칙적으로 약을 복용해야 하는 환자들을 대상으로 약복용을 지원할 수 있도록 모델링되었다. 또한, 스마트폰을 통해 모바일 환경에 있는 환자에게 약복용 알림, 복약지도, 순응률 조회 등의 모니터링 서비스를 제공한다. 앱 서버는 환자들의 약복용 스케줄 데이터를 관리하며, 이 데이터는 3GS 통신을 통해 스마트폰과 동기화 된다. 순응률은 약복용 알림에 대해 환자의 대응에 따라 자동으로 계산되며 조화될 수 있다. 이 앱 통신은 국제표준 IEEE P11073-10472으로 구현되었다.

• Journal of the Institute of Electronics Engineers of Korea SP
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• v.42 no.5 s.305
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• pp.19-28
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• 2005

Real surround viewing conditions in watching the color display devices such as TV and PC monitor are quite different from the standard viewing conditions. Human visual system is adapted chromatically under the different viewing conditions in luminance levels and chromaticity of illuminants. Accordingly, the reproduced colors of the same chromaticity will appear as quite different color. Therefore, it is necessary that the displayed colors are reproduced to be appeared as the original colors in the standard viewing conditions. In this paper, we propose a chromatic adaptation model for the variations of the surround illuminants' chromaticity under the same luminance conditions. In proposed chromatic adaptation model, we calculate each gain of L, M, and S as nonlinear functions according to the chromaticity of the surround illuminants. And the optimal coefficients are obtained from the corresponding colors data of the Breneman's experiments. The proposed chromatic adaptation model is compared with the conventional chromatic adaptation models. In the experimental results, the proposed model has very good performance in the whole range of luminance levels. We also experimentally confirmed that the reproduced corresponding colors using the proposed chromatic adaptation are appeared as the original colors when the real surround viewing conditions are different from the standard viewing conditions.

• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 2001.05a
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• pp.141-146
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• 2001

실내 공기조화를 하는 거주역에 대한 온열환경요소의 자극 변화를 통해 실내 에너지를 절약할 수도 있으며 쾌적감도 향상시킬 수 있다. 따라서 본 연구에서는 거주자의 온열감각을 자극할 수 있는 온열요소 중 비교적 영향이 크고 용이하게 제어할 수 있는 온도 및 기류의 변동으로 한국인의 온열감각(온냉감, 쾌적감, 만족감)에 미치는 영향을 실험을 통하여 파악하였다. 온도 및 기류별 실험을 통하여 22$^{\circ}C$, 24$^{\circ}C$, 26$^{\circ}C$의 각 온도에 대한 패케지 에어컨의 강, 중, 약 기류에 대한 인체순응 시간과 인체 변화를 파악하였다. 또한 인체순응시간을 고려한 온도 상승 실험을 통하여 24$^{\circ}C$, 26$^{\circ}C$에서 1$^{\circ}C$온도 상승시 인체의 온열쾌적감의 변화를 파악하였으며 온도 상승을 통한 인체 순응시간을 도출하였다. 본 실험을 통하여 초기공조 조건을 24C$^{\circ}C$ 로 한 경우 인체순응을 통한 온도 상승으로 30분 후의 공조중기와 공조후기에 온도 및 기류의 지속적인 변동 자극으로 온냉감은 "약간 서늘하다"를 지속적으로 유지하고 있으며 온도상승으로 인한 쾌적존의 높은 온도에서도 기류의 영향으로 쾌적감은 30분 이후부터 "쾌적"을 지속적으로 유지하는 것을 알 수 있었다. 따라서 본 연구를 통하여 인체순응을 고려한 온도 및 기류의 자극을 통하여 공조초기부터 공조말기의 장시간에도 인체가 지속적인 쾌적성을 유지한다는 것을 알 수 있었다.성을 유지한다는 것을 알 수 있었다.

• Journal of the Institute of Electronics Engineers of Korea SP
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• v.45 no.5
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• pp.9-17
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• 2008

This paper proposes a method of color reproduction considering the viewing conditions of a PDP TV. Because of a change of peripheral environments by a temporal and spatial location of observers, the ambient lightings should be considered in the process of color reproduction of displays. A conventional method enhances the contrast and saturation of images by controlling voltage gains in each channel, so that there is a limit to implementing the phenomenon of human adaptation. This method also faces difficulties in reproducing the perceived colors under a variety of viewing conditions. Accordingly, in order to solve this problem, we first characterize the device by considering the brightness and the flare effect. The chromatic adaptation is finally applied to reproduce colors in a PDP TV using the information from the viewing conditions by the sensor. The images reproduced by the proposed method are visually more superior to those reproduced by a conventional method in the experiments.

• Korean Security Journal
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• no.9
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• pp.99-131
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• 2005

Terrorism which became today's common phenomena over the world is one of the most serious threats the world confront. Although International society make and operate outstanding anti-terrorism system, terror would never end without solving fundamental problems. The main body of terrorism converts from nation to organization and from organization to cell, which makes it difficult for us to recognize the main body. Since the target of today's new terrorism is many and unspecified persons, terrorists will never hesitate to use mass destruction weapons such as nuclear, biological, chemical weapons, and also use cyber-technique or cyber-terrorism. So, effective counter-terrorism measures should be performed as follows. First, it must be better for international society should make long-time plan of solving fundamental problems of terrorism other than to operate directly on terror organization and its means. Second, preventive method should be made. The most effective method of eradicating terrorism is prevention. For this, it is necessary to remove environmental elements of terrorism and terrorist bases, and to stop inflow of money and mass destruction weapons to terrorists. Third, integrated anti-terror organization should be organized and operated for continuous counter-terrorism operations. Also international alliance for anti-terrorism should be maintained to share informations and measures. Fourth, concerned department in the government should prepare counter-terrorism plans in their own parts as follows and make efforts to integrate the plans. - Ministry of Government Administration and Home Affairs : conventional terror - Ministry of Health and Welfare : bio-terror - Ministry of Science and Technology : nuclear-terror Especially, they should convert their policy and operation from post-terror actions to pre-terror actions, designate terror as national disaster and organize integrated emergency response organization including civil, government, and military elements. In conclusion, pre-terror activities and remedy of fundamental causes is the best way to prevent terror. Also, strengthening of intelligence activities, international cooperations, and preventive and comprehensive counter-measures must not ignored.

• Journal of the Korean housing association
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• v.24 no.6
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• pp.69-79
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• 2013

The concept of sustainable development to preserve natural environment through economy in resources and energy is gradually distinguished since environmental problems as a series of air pollution and global warming take place now. Building occupies more than 1/3 of energy consumption in the whole world. Energy consumption of buildings caused a quick increase in the amount of energy use by air conditioning, which has a lot of effects on exhaustion of fossil energy as well as an increase in environmental load. Therefore, this research intends to suggest characteristics and direction for the designing of acclimatization's housing through the case study on acclimatization's housing. Acclimatization's housing is designed to reduce building load from the designing stage unlike green home or low-energy apartment. Also, factors which are commonly applied to acclimatization's housing are applied complexly by design strategic factors of Heating, Cooling and Lighting. The applied design factors make effects mutually and complexly. In addition, design strategy showed different priority by designing direction.

• Journal of the korean veterinary medical association
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• v.40 no.4
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• pp.367-371
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• 2004

• Electronics and Telecommunications Trends
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• v.24 no.2
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• pp.56-66
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• 2009

모바일 관련 산업의 중요성이 증대되고 모바일 기술이 급격히 발전하는 시점에, 지난 수 년간 우리 사회의 곳곳에서 등장한 2.0 패러다임은 모바일 웹 2.0패러다임을 등장시키며 정보통신산업에 큰 변화를 초래하고 있다. 사업자들은 유무선 네트워크 간의 경계가 희미해지고, 전통적인 통신산업의 가치사슬 내의 사업영역이 붕괴되면서 무한경쟁 체제로 진화되어 가고 있는 환경 변화에 순응하고 다양한 모바일 웹 2.0 관련사업을 시도하며 발전시켜 가고 있다. 모바일 웹 2.0사업의 진화 패러다임은 개방/공유/참여의 서비스 모델, 광고수익 모델, 사업자 간 인수 합병 및 전략적 제휴의 활성화, 무선망개방과 풀브라우징의 확대, 유무선 연계 통합 서비스 등으로 요약이 가능하다. 국내외 관련 사업자들은 이러한 패러다임에 순응하고 진화시켜 가며 모바일 웹 시장의 성장을 위한 지속적인 노력을 하고 있으나, 아직까지도 모바일 웹 시장은 도입기 단계에 머무르고 있다. 이는 모바일 웹 시장의 활성화를 위한 환경 조성이 미비하기 때문인 것으로 분석되며, 이러한 환경개선을 위해 망과 플랫폼의 개방, 투명한 요금제의 확산, 관련 기술의 표준화의 정착을 위한 지속적인 노력이 필요한 시점이다.