• 한국국방경영분석학회지
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• 제23권1호
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• pp.14-24
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• 1997

This study is to develop an optimal surveillance units assignment model in order to obtain the maximized surveillance efficiency with the limited surveillance units. There are many mathematical models which deal with problems to assign weapons such as aircrafts, missiles and guns to targets. These models minimize the lost required to attack, the threat forecast from the enemy, or both of them. However, a problem of the efficient assignment of surveillance units is not studied yet, nevertbless it is important in the battlefield surveillance system. This paper is concerned with the development of the optimal surveillance units assignment model using integer programming. An optimal integer solution of the model can be obtained by using linear programming and branch and bound method.

• 디지털콘텐츠학회 논문지
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• 제19권3호
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• pp.587-593
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• 2018

증후군감시는 감염병 발생 초기에 나타날 수 있는 임상적 증상 발생동향을 감시하여 감염병의 발생을 가능한 조기에 인지하기 위해 고안된 감시체계이다. 한국 질병관리본부에서는 응급실 기반의 증후군감시시스템을 개발하였으며, 현 시스템의 기능을 강화하고자 국외 증후군감시 조기경보시스템에 관한 문헌조사를 하였다. 본 논문에서는 국외 증후군감시 조기경보시스템 운영현황을 설명, 비교하여 한국의 응급실 기반 증후군감시를 위한 조기경보시스템의 개선에 필요한 근거자료를 마련하였다.

• Korean Journal of Radiology
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• 제22권7호
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• pp.1087-1099
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• 2021

MRI has become important for the detection of prostate cancer. MRI-guided biopsy is superior to conventional systematic biopsy in patients suspected with prostate cancer. MRI is also increasingly used for monitoring patients with low-risk prostate cancer during active surveillance. It improves patient selection for active surveillance at diagnosis, although its role during follow-up is unclear. We aim to review existing evidence and propose a practical approach for incorporating MRI into active surveillance protocols.

• 한국산학기술학회논문지
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• 제15권1호
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• pp.418-424
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• 2014

본 논문에서는 영상감시 시스템을 위한 감시영역 입력방법을 제안한다. 이동물체의 침입 여부는 감시영역과 비교를 통해 이루어지므로 이를 입력하는 방법은 영상감시의 가장 기본적인 기능이다. 기존의 방법은 각 카메라 별로 획득된 영상을 기반으로 감시영역을 설정하기 때문에 감시영역의 크기. 카메라 수, 카메라 위치 등 감시환경의 변화에 대응하기 어려운 단점이 있다. 제안하는 입력방법은 위성지도를 기반으로 감시영역 전체를 다각형으로 정의하고, 이를 각 카메라 환경으로 변환하는 접근방법을 사용한다. 이 방법의 특징은 감시환경에 독립적이라는 점이다. 다각형의 정점의 수를 n이라 하면 침입탐지 수행시간은 O(n)의 복잡도를 보인다. 제안하는 방법의 타당성을 검증하기 위해 3D 시뮬레이션을 수행하였으며, 각 카메라 수와 위치에 무관하게 입력된 감시영역을 재사용할 수 있음을 확인하였다.

• 대한수의학회지
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• 제64권2호
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• pp.18.1-18.5
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• 2024

The surveillance and epidemiological investigation systems for companion animals in South Korea are significantly underdeveloped compared to those for humans and livestock. Recent outbreaks, such as idiopathic neuromuscular syndrome and highly pathogenic avian influenza among cats, have highlighted the need for reliable systems. This short review conducts situation analysis regarding disease surveillance and epidemiological investigation for companion animals in South Korea. The current challenges include an absence of administrative leadership, a lack of legal support, and unreliable medical data. The recommendations for future directions include clear leadership by the Animal and Plant Quarantine Agency, amending the Act on the Prevention of Contagious Animal Diseases to include companion animals, and enhancing the quality of medical data through standardized coding systems, such as Systematized Nomenclature of Medicine Clinical Terms. In addition, sentinel surveillance rather than universal systems should be established to provide adequate incentives for local practitioners to provide data and develop sustainable public-private networks. These recommendations could be important for developing a comprehensive and sustainable system for disease surveillance and epidemiological investigation in the companion animal field.

• Journal of Information Processing Systems
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• 제15권2호
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• pp.344-358
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• 2019

Surveillance cameras have installed in many places because security and safety is becoming important in modern society. Through surveillance cameras installed, we can deal with troubles and prevent accidents. However, watching surveillance videos and judging the accidental situations is very labor-intensive. So now, the need for research to analyze surveillance videos is growing. This study proposes an algorithm to track multiple persons using SURF and background subtraction. While the SURF algorithm, as a person-tracking algorithm, is robust to scaling, rotating and different viewpoints, SURF makes tracking errors with sudden changes in videos. To resolve such tracking errors, we combined SURF with a background subtraction algorithm and showed that the proposed approach increased the tracking accuracy. In addition, the background subtraction algorithm can detect persons in videos, and SURF can initialize tracking targets with these detected persons, and thus the proposed algorithm can automatically detect the enter/exit of persons.

• 한국측량학회지
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• 제32권2호
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• pp.153-162
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• 2014

다양한 분야에서 CCTV가 널리 활용되고 있으며, CCTV의 감시 성능을 개선하기 위한 노력들이 지속되고 있다. 그러나, 정작 감시 성능을 정량적으로 평가하는 방법은 상당히 미비하다. 이에 본 연구는 CCTV 시스템이 대상 공간을 주어진 감시 목적에 부합하게 잘 감시하는가를 정량적으로 평가하는 방법을 제안한다. 먼저 대상 공간의 특정한 위치에서 특정한 방향을 바라보는 객체가 CCTV로 얼마나 정밀하게 관측되는 가를 정량적으로 나타내는 감시 해상도를 정의한다. 정의된 감시 해상도를 대상 공간에서 관심 있는 모든 위치와 방향에 대해 계산하여 감시 목적에 따라 요구되는 최적의 해상도 이상이 성취되는 비율로써 대상 공간에 대한 감시 성능 지수를 산출한다. 제시된 방법을 적용하여 대형 건물 지하주차장에 설치된 CCTV 시스템의 감시 성능을 평가하고 가시화하여 분석하고 개선하는 사례를 기술한다. 제안된 방법은 대상 공간이 감시 목적에 맞게 효과적으로 감시되고 있는지 정량화하여 평가하고, 대상 영역을 요구 성능으로 감시하기 위한 CCTV 시스템 설계의 최적화에 기여한다.

• 대한수의학회지
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• 제53권4호
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• pp.193-197
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• 2013

Avian influenza viruses (AIV) have been isolated from a wide range of domestic and wild birds. Wild birds, predominantly ducks, geese and gulls form the reservoir of AIV in nature. The viruses in wild bird populations are a potential source of widespread infections in poultry. Active surveillance for AIV infection provides information regarding AIV distribution, and global AIV surveillance can play a key role in the early recognition of highly pathogenic avian influenza (HPAI). Since 2003 in Korea, there have been four H5N1 HPAI outbreaks caused by clade 2.5, 2.2 and 2.3.2. Therefore, improvement of AIV surveillance strategy is required to detect HPAI viruses effectively. This article deals with the major events establishing the role of wild birds in the natural history of influenza in Korea. We highlighted the need for continuous surveillance in wild birds and characterization of these viruses to understand AIV epidemiology and host ecology in Korea.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 학술대회 논문집 정보 및 제어부문
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• pp.337-339
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• 2005

The demand for a real-time image surveillance system using network camera server is increasing as the network infra has been grown and digital video compression techniques have been developed. The image surveillance system using network camera server has several merits compared to existing real-time image surveillance system using CCTV. It would be more convenient if wireless realtime image transmission were possible. In this paper, a bluetooth module is designed and implemented for a real-time image surveillance system to send and receive informations wirelessly. It may simplify the system development procedures and increase the productivity by low power consumption, low cost, and simple wireless installation. A scatter-net formation is proposed using dynamic and distributed algorithm so that the network connection is reliable.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 제38회 하계학술대회
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• pp.1187-1188
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• 2007

Most of the surveillance systems are based on CCTV, closed circuit Television. A surveillance system for urban transit is also based on CCTV. Urban transit operation corporations have a CCTV system and a lot of cameras to monitor the situation for the passengers, and the important facilities. But this system has some problems that it cannot respond to a state of emergency immediately. In this paper, we describe a configuration of an intelligent surveillance system for urban transit to solve that problems. Our proposed configuration include a camera with some intelligent module, and a processor to integrate various data from not only cameras, but also sensors such as a temperature sensor, a heat sensor, sound sensor and etc. and some other data generator. This system configuration can decide the state of the passengers and the facilities. The surveillance system with this configuration can available with the existing surveillance system without a considerable improvement.