• Journal of Korean Ophthalmic Optics Society
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• v.6 no.1
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• pp.65-69
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• 2001

To investigate the visual acuity of the primary school children. This study was researched visual acuity test using objective and subjective methods. 1. The eye types were 90.3% positive for myopia, 3.1% for emmetropia, 4.9% hyperopia, 1.7% for mired astigmatism. 2. The abnormal refraction eyes were 58.6% positive for simple myopia, 29.9% for myopic compound astigmatism, 5.1% for my optic simple astigmatism and 1.9% for simple hyperopia, 1.9% for hyperopic compound astigmatism, 1.3% for hyperopic simple astigmatism, 1.3% for mixed astigmatism. 3. The axis of astigmatism were 85.7% for astigmatism with-the-rule, 9.3% for astigmatism against-the-rule, 5.0% for astigmatism oblique. 4. On total myopic spheric power. the -0.50

• Fire Science and Engineering
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• v.19 no.1 s.57
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• pp.99-103
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• 2005

This study is the mono signal detector and the multitype detector of mono signal On/Off circuit type. The multi functional base circuit focused on which is made of compatible with exiting fire detector base. The multi functional base circuit generates two fire signals at the same time, so it can link the existing fire alarm system with security system. The base circuit is easily able to be connected to exiting HA or OA facilities, having stability and reliability. As a result of the study, the multi functional base circuit has met the acceptance criteria of related national standards. Also, the security system of input signal can contribute to the smallest loss of lives and the property.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2017.10a
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• pp.346-348
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• 2017

The speed of technology development is increasing, and high-performance digital devices are spreading. Smart walks that can work effectively anytime and anywhere by being restricted from space and time in wired digital devices such as PC, System security design is needed to secure integrity and availability against various security threats such as physical threats such as lost, stolen and damaged terminals, technical threats such as theft, denial of service, and unauthorized access, compared with the wired environment. In this paper, we analyze smart work network system, wired / wireless link system, and digital smart device. We study security design method for smart work wired system and future wireless system which are used in present work. This study will be used as basic data for building a secure smart work.

• Korean Security Journal
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• no.27
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• pp.7-30
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• 2011

Shoplifting causes serious losses to not only stores but also to consumers and society as a whole. There need to be effective society-wide measures to control shoplifting due to its characteristic of playing the role as a stepping stone to induce more serious crimes. However, there is a lack of research on shoplifting in Korea, especially the research analyzing situational factors to suggest effective alternative measures for shoplifting prevention. Therefore, the current study surveyed teenagers, the group known to be the most frequent shoplifters, to see their perception of effectiveness of the situational crime prevention methods used in stores. The result showed that the teenagers found only some of the prevention methods effective, including CCTV, Electronic Article Surveillance(EAS), minimization of blind areas, and watchful clerks. However, factors such as the number of doors and their accessibility and presence of security guards were not perceived to be very effective. Using the result of the survey, this study suggests ways to utilize situational crime prevention methods more effectively to deter shoplifting.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.23 no.2
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• pp.207-214
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• 2019

The speed of technological development is increasing, and high-performance digital devices are spreading. Wired digital devices such as PCs have been optimized for existing wired environments, but needs are shifting away from the constraints of space and space to smart work that enables efficient work anywhere and anytime. The Smart Work System security design is needed to secure integrity and availability in the face of various security threats including physical threats (lost, stolen, and damaged terminals), technical threats (data theft, DoS: denial of service), and unauthorized access outside the wired environment. In this study, we analyzed smart work network systems, wired / wireless link systems, and digital smart devices. We also studied cyber-attack analysis and cybersecurity design methods for a Smart Work wired system and a future wireless system. This study will be used as basic data for building a secure Smart Work system.

• Journal of Korean Ophthalmic Optics Society
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• v.13 no.1
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• pp.125-129
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• 2008

Purpose: To research the study of abnormal refraction eye on women population of university students in South - East Korea. Methods: Between March 2007 and October 2007, the refraction test of eye glasses wearer was evaluated on women population (367 students, aged 19~22 years) of university in living on Kyung-Nam and Pusan province. Data was analysed with T-test. Results: On the abnormal refraction status, Compound Myopic Astigmatism was 76.72%, simple myopia was 10.90%, mixed astigmatism was 6.27%, respectively. On the prevalence of myopic power, low was 59.57%, moderate was 24.93%, high was 15.49%, respectively. On the myopic equivalent power, the right eye had more increase to compare to left eye. but these was not a statically significant correlation (p<0.5) between the right and left eyes. On the anisometropia of spherical equivalents and cylinder power, most subjects was under 1.0 diopter. On the other hand, the type of astigmatic axis was with-the rule (70.79%), against -the rule (18.41%), and oblique (10.80%). Conclusions: This study identify that the refraction status of abnormal refraction eye on women population in university students in South-East Korea have been more increased prevalence the myopia and astigmatism.

• Proceedings of the Korea Information Processing Society Conference
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• 2017.04a
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• pp.230-233
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• 2017

최근 기존에 사용하던 패스워드, PIN의 취약성으로 인해 개인정보 유출, 도난 등 다양한 문제가 발생하고 있다. 이를 대체할 목적으로 사람의 신체를 이용한 바이오 인증 기술이 떠오르고 있으며, 많은 연구를 거치고 있다. 그러나 사람의 바이오 정보는 외부에 노출 될 시, 이를 복구할 방법이 없기 때문에 개인정보 보호가 필수적이다. 본 논문에서는 바이오 인식 기술 중 지문을 기반으로 사용자 매칭 기법과 개인 프라이버시 보호를 위한 템플릿 구성방법에 대한 동향을 살펴본다.

• Proceedings of the KAIS Fall Conference
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• 2009.12a
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• pp.148-151
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• 2009

여성의 사회참여, 평균수명의 증가에 따른 노령인구의 증가로 가정은 비어 있거나 노인, 어린이만 남게 되는 경우가 증가하고 있다. 본 제품은 이런 추세에 대응하여 가정과 동떨어진 장소에서 인터넷으로 가정을 보안, 감시할 수 있고, 가정에 남겨진 사람과 대화도 할 수 있는 로봇을 구현하고자 한다. 즉, 무선 영상 전송 카메라가 부착된 로봇을 이동시키면서 집안의 환경을 관찰할 수 있도록 하고, 스피커 및 마이크를 로봇에 내장하여 인터넷을 통한 실시간 대화도 가능하도록 하려고 한다. 또한, 외부 침입자 발견 시 자동 촬영 기능이 있으며, 집주인에게 메시지 나 경보음을 보내 대응할 수 있도록 하였다. 이렇게 함으로써 가정을 가진 여성이 집안 걱정을 하지 않고 근무에 전념할 수 있어 생산성이 향상되고, 집에 물건을 놓아두고 외출을 하였을 때 간단한 방법으로 확인 가능한 이점도 있을 뿐 아니라 장기간 집을 비우게 되는 경우에도 항상 집을 감시할 수 있어, 도난 화재 등에 신속하게 대처할 수있다. 1년차 '보안 기능 탑재 애완용 로봇 개발'을 통한 2년차 과제로 로봇의 완성과 제품화 단계에 심혈을 기울였다. 본 연구는 2년차 연구의 결과를 보여주는 것이다.

• Journal of Digital Convergence
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• v.12 no.6
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• pp.317-323
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• 2014

The registration cards that are currently used to identify the people of Korea may cause secondary damage once stolen because they contain very specifically expressed fingerprint information. In order to solve this problem, in ID is required that can utilize the state-owned fingerprint DB, while while maintaining confidentiality of the identification information and satisfying the cost as well. At this point accordingly, a secure form of ID, which uses the encrypted QR code and fingerprint information, is proposed.

• Proceedings of the KAIS Fall Conference
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• 2009.05a
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• pp.28-31
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• 2009

여성의 사회참여, 평균수명의 증가에 따른 노령인구의 증가로 가정은 비어 있거나 노인, 어린이만 남게 되는 경우가 증가하고 있다. 본 제품은 이런 추세에 대응하여 가정과 동떨어진 장소에서 인터넷으로 가정을 보안, 감시할 수 있고, 가정에 남겨진 사람과 대화도 할 수 있는 로봇을 구현하고자 한다. 즉, 무선 영상 전송 카메라가 부착된 로봇을 이동시키면서 집안의 환경을 관찰할 수 있도록 하고, 스피커 및 마이크를 로봇에 내장하여 인터넷을 통한 실시간 대화도 가능하도록 하려고 한다. 또한, 외부 침입자 발견 시 자동 촬영 기능이 있으며, 집주인에게 메시지 나 경보음을 보내 대응할 수 있도록 하였다. 이렇게 함으로써 가정을 가진 여성이 집안 걱정을 하지 않고 근무에 전념할 수 있어 생산성이 향상되고, 집에 물건을 놓아두고 외출을 하였을 때 간단한 방법으로 확인 가능한 이점도 있을 뿐 아니라 장기간 집을 비우게 되는 경우에도 항상 집을 감시할 수 있어, 도난 화재 등에 신속하게 대처할 수 있다. 1년차 '보안 기능 탑재 애완용 로봇 개발'을 통한 2년차 과제로 로봇의 완성과 제품화 단계에 심혈을 기울였다. 본 연구는 2년차 연구의 결과를 보여주는 것이다.