• The Journal of Korean Institute of Communications and Information Sciences
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• v.30 no.1A
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• pp.28-36
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• 2005

Wireless Sensor Networks are the technology, in which various applications such as surveillance and information gathering are possible in the uncontrollable area of human. And numerous studies are being processed for the application of ubiquitous network environment. One of major issues in sensor network is the research for prolonging the lifetime of nodes through the use of various algorithms, suggested in the mac and routing layer. In this paper, aiming at reducing energy waste, caused by redundant transmission and receipt message, we propose the mac protocol using active signal and analysis performance through simulation.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2011.10a
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• pp.157-160
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• 2011

In this paper, We proposed the method of recognition and analysis of human activites using Motion vector in real-time surveillance system. We employs subtraction image techniques to detect blob(human) in the foreground. When MPEG-4 video recording EPZS(Enhanced Predicted Zonal Search) is detected the values of motion vectors were used. In this paper, the activities of human recognize and classified such as meta-classes like this {Active, Inactive}, {Moving, Non-moving}, {Walking, Running}. Each step was separated using a step-by-step threshold values. We created approximately 150 conditions for the simulation. As a result, We showed a high success rate about 86~98% to distinguish each steps in simulation image.

• Ocean Systems Engineering
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• v.10 no.4
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• pp.373-397
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• 2020

Heave compensation is a vital part of various marine and offshore operations. It is used in various applications, including the transfer of cargo between two vessels in the open ocean, installation of topsides of an offshore structure, offshore drilling and for surveillance, reconnaissance and monitoring. These applications typically involve a load suspended from a hydraulically powered winch that is connected to a vessel that is undergoing dynamic motion in the ocean environment. The goal in these applications is to design a winch controller to keep the load at a regulated height by rejecting the net heave motion of the winch arising from ship motions at sea. In this study, we analyze and compare the performance of various control algorithms in stabilizing a suspended load while the vessel is subjected to changing sea conditions. The KCS container ship is chosen as the vessel undergoing dynamic motion in the ocean. The negative of the net heave motion at the winch is provided as a reference signal to track. Various control strategies like Proportional-Derivative (PD) Control, Model Predictive Control (MPC), Linear Quadratic Integral Control (LQI), and Sliding Mode Control (SMC) are implemented and tuned for effective heave compensation. The performance of the controllers is compared with respect to heave compensation, disturbance rejection and noise attenuation.

• The Transactions of the Korean Institute of Electrical Engineers A
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• v.48 no.1
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• pp.68-75
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• 1999

Machine recognition of faces from still and video images is emerging as an active research area spanning several disciplines such as image processing, pattern recognition, computer vision and neural networks. In addition, human face identification has numerous applications such as human interface based systems and real-time video systems of surveillance and security. In this paper, we propose an algorithm that can identify a particular individual face. We consider human face identification system in color space, which hasn't often considered in conventional in conventional methods. In order to make the algorithm insensitive to luminance, we convert the conventional RGB coordinates into normalized CIE coordinates. The normalized-CIE-based facial images are KL-transformed. The transformed data are used as the input of multi-layered neural network and the network are trained using error-backpropagation methods. Finally, we verify the system performance of the proposed algorithm by experiments.

• Proceedings of the Korea Information Processing Society Conference
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• 2013.11a
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• pp.1401-1403
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• 2013

사건 발생 후의 대응이 아닌 영상 분석을 통해 실시간으로 위협 상황에 대응할 수 있는 지능형 영상 보안 기술이 매우 중요한 이슈가 되고 있다. 본 논문에서는 지능형 영상 보안에 사용할 수 있는 실시간 얼굴 인식 및 추적 기법을 제안한다. 사람의 정면 얼굴 영상을 ASM(Active Shape Model) 알고리즘을 이용하여 정규화 시키고 Gabor Wavelet Filter를 이용하여 얼굴 고유 특징 벡터를 추출하여 인식에 사용하였다. 인식이 완료된 얼굴은 Camshift와 Kalman Filter를 이용하여 카메라 감시 영역에서 벗어날 때까지 강건한 추적을 통하여 관리자가 실시간으로 확인 및 대응할 수 있게 하였다.

• International Journal of Advanced Culture Technology
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• v.9 no.4
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• pp.1-8
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• 2021

Since the late 20th century, various projects in the public domain where local communities and art organizations collaborate have been attempted in miscellaneous ways. In terms of anticipating an active attitude of the community, socially engaged project focuses on proactively changing everyday life and environment of people. An art collective, Assemble who won the Turner Prize in 2015 for one of their projects named Granby Four Streets (2013) has been admitted as an exemplary of this phenomenon, and it appears frequently in discussions about community-led projects. We investigate Granby Four Streets, as well as the documentation formed by the perspective of third parties based on the surveillance and criticism aspects. It asserts that the limitation of socially engaged projects that are kept ephemerally and easily forgotten could be overcome with the concept of documentation and its practice.

• Proceedings of the Korea Information Processing Society Conference
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• 2011.11a
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• pp.120-122
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• 2011

과학 기술과 의학 기술의 발달로 전 세계적인 고령화 인구 비율도 해마다 증가하고 있다. 본 연구에서는 이러한 고령화 인구 증가 현상에 대한 대책 방안의 하나로 U-HealthCare 시스템에 구글맵(Google Map) 3D 기반의 실시간 위치 추적기법을 적용 시켜 노약자들이 이동하는 중간에 실시간 위치 추적을 실시하여 추후 발생 할 수 있는 위험 사태에 대비하고자 한다. 제안 방식은 구글 맵 3D 서비스 방식이기에 2D 서비스나 문자 서비스 방식보다 시각적으로 건물의 생김새나 주변의 건물에 대한 정확한 파악이 가능하여 노약자들의 위치 정보에 대한 신속한 대체가 가능하다.

• Journal of the Korea Institute of Military Science and Technology
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• v.27 no.2
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• pp.140-146
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• 2024

Active electronically scanning antennas are faster and more flexible in beam-scheduling than mechanical antennas. Thus, they require an advanced resource management or detection methods to operate efficiently. In a surveillance radar performing periodic detection, alert-confirm detection is an excellent method to improve the cumulative detection probability by reducing the period while maintaining the detection probability. This paper proposes a design method for alert-confirm detection based on the parameters of the conventional design. We developed a simulator based on simulink@matworks and verified the result through Monte Carlo simulation.

• Journal of the Korea Fashion and Costume Design Association
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• v.19 no.4
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• pp.59-73
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• 2017

This study examined the effects of media exposure and involvement on objectified body consciousness and appearance management behaviors. The subjects were 325 female university students in Daejeon and Chungnam Province. The research method was a survey, and the questionnaire was composed of media exposure and involvement, objectified body consciousness, appearance management behaviors, and subjects' demographic characteristics. The data were analyzed by descriptive statistics, Cronbach's ${\alpha}$, factor analysis, and regression analysis using SPSS program. The results were as follows. First, female university students used mass media for about 3.76 hours a day and showed a high level of media involvement. Second, three factors (body surveillance, body shame, and appearance control belief) emerged regarding objectified body consciousness with female university students showing a high level of objectified body consciousness. Third, six factors (make-up, plastic surgery, weight control, fashion, hair, and skin care) emerged regarding appearance management behaviors with female university students showing high intention to perform various appearance management behaviors. Fourth, media exposure and involvement had important effects on objectified body consciousness and appearance management behaviors, and media involvement was a more important variable than media exposure. Fifth, objectified body consciousness had important effects on appearance management behaviors. Body shame had more important effects on skin care, weight control, and plastic surgery behaviors, while body surveillance had more important effects on fashion, make-up, and hair management behaviors than other objectified consciousness factors. The implication of this study was that media involvement is a more important variable affecting objectified body consciousness and appearance management behaviors than media exposure, and among objectified body consciousness dimensions, body shame has important effects on more active appearance management behaviors like weight control and plastic surgery behaviors.

• Journal of Preventive Medicine and Public Health
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• v.27 no.4 s.48
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• pp.735-745
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• 1994

The incidence data (1991. 7. 1$\sim$1992. 6. 30) from the Implementation Study of Seoul Cancer Registry (ISSCR) were evaluated in terms of its completeness and validity. Two indicators for the completeness, Mortality/Incidence ratio (M/I ratio) and Age-specific Incidence Curve, showed fairy good registration throughout the age-sex specific strata, except the strata aged over 75 years old. The strata had very high M/I ratio (over 100%) and decreasing pattern of incidence, which suggested incomplete registration of cancer in this group. The active surveillance by a ISSCR staff improved the registration rate especially among elderlies. From the site specific M/I ratio, we found that liver cancer had oddly high M/I ratio. Since this high M/I ratio of liver cancer appears consistently in other reliable cancer registries, it is more like to be due to the high fatality of it rather than incomplete registration. The validity of the incidence data was assessed by three indicators; Histological Verification (HV%), Primary Site Unknown (PSU%), and Age Unknown (Age UNK%). The average HV% were 77% for men and 85% for women, which were slightly lower than those of other reliable cancer registries. This low HV% might be due to the considerable size of relative frequency of liver cancer in Korea, regarding the fact that the diagnosis of liver cancer is made mostly by non-biopsical radiologic methods (CT, Ultrasono, Angiography, MRI etc.). The level of PSU% and Age UNK% were in acceptable range, but not low enough, especially in terms of Age UNK%. Although ISSCR data had acceptable quality in general, it is needed to have more hospitals participate in the registry surveillance, to make registery data merged with death certificate data regulary, and educate the registration stans to be more competent and dedicated.