• 전자공학회논문지
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• 제53권2호
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• pp.133-140
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• 2016

해안 수중 감시를 위하여 분산센서망를 해안에 설치하고, 이를 이용하여 표적을 탐지하고 표적의 위치를 추정하는 연구가 많이 이루어지고 있다. Zhou 등은 표적 탐지만 가능한 간단한 구조의 센서들로 구성된 분산센서망에서 표적을 탐지한 센서들의 위치 정보를 활용하여 표적의 위치를 추정하는 기법을 제안하였다. Zhou 등이 제안한 기법은 다른 기존의 기법에 비해 표적탐지 신호의 전파모델에 대한 파라미터들을 별도로 추정할 필요가 없고, 연산량이 적으며, 분산센서망에서 적은 량의 데이터만 송수신하여도 된다. 그러나 Zhou 기법은 표적의 위치 추정오차가 크다. Ryu는 추정오차를 줄이기 위하여 Zhou 기법을 수정하였다. 수정된 Zhou 기법은 Zhou 기법보다 추정성능이 향상되었지만, 여전히 비교적 큰 추정오차를 가지고 있다. 본 논문에서는 수정된 Zhou 기법으로 구한 표적의 방위각을 나타내는 직선과 표적을 탐지한 센서들과의 기하학적 구조를 고려한 표적위치 추정기법을 제안하였으며, 수정된 Zhou 기법에 기반을 두고 있다. 제안한 기법의 표적위치 추정성능이 Zhou 기법과 수정된 Zhou 기법 보다 향상되었음을 컴퓨터 시뮬레이션을 통하여 확인하였다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제13권2호
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• pp.751-770
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• 2019

Action recognition is an essential task in computer vision due to the variety of prospective applications, such as security surveillance, machine learning, and human-computer interaction. The availability of more video data than ever before and the lofty performance of deep convolutional neural networks also make it essential for action recognition in video. Unfortunately, limited crafted video features and the scarcity of benchmark datasets make it challenging to address the multi-person action recognition task in video data. In this work, we propose a deep convolutional neural network-based Effective Hybrid Learning (EHL) framework for two-person interaction classification in video data. Our approach exploits a pre-trained network model (the VGG16 from the University of Oxford Visual Geometry Group) and extends the Faster R-CNN (region-based convolutional neural network a state-of-the-art detector for image classification). We broaden a semi-supervised learning method combined with an active learning method to improve overall performance. Numerous types of two-person interactions exist in the real world, which makes this a challenging task. In our experiment, we consider a limited number of actions, such as hugging, fighting, linking arms, talking, and kidnapping in two environment such simple and complex. We show that our trained model with an active semi-supervised learning architecture gradually improves the performance. In a simple environment using an Intelligent Technology Laboratory (ITLab) dataset from Inha University, performance increased to 95.6% accuracy, and in a complex environment, performance reached 81% accuracy. Our method reduces data-labeling time, compared to supervised learning methods, for the ITLab dataset. We also conduct extensive experiment on Human Action Recognition benchmarks such as UT-Interaction dataset, HMDB51 dataset and obtain better performance than state-of-the-art approaches.

• 농촌의학ㆍ지역보건
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• 제34권1호
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• pp.58-66
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• 2009

배경 : 이 연구에서는 조류인플루엔자에 대한 가금류 사육업자의 신고의지 및 이에 대한 언론보도에 의한 영향 등을 파악함으로써 조기감시 및 방역 등에서 중요한 대상인 가금류 사육업자의 적극적 참여를 유도할 수 있는 홍보 전략의 필요성을 제시하고자 하였다. 방법 : 연구는 가금류 사육업자 28명과 비사육업자 60명을 대상으로 실시하였다. 사육업자는 ‘08년도 조류독감 유행지역에서, 비사육업자는 유행이 없었던 지역에서 선정하였다. 조사기간은 2008년 7월-8월 2개월이었다. 설문내용은 대상자의 일반 특성, 조류인플루엔자에 대한 주관적 지식 및 인지 수준, 언론보도에 대한 영향 및 신뢰수준 등으로 구성하였다. 결과 : 조언론보도가 자신과 다른 사람에게 미치는 영향에 대한 ‘제3자 효과’는 사육업자에서 32.1%로서 비사육업자의 10.0%보다 높게 나타으며(p<0.05) 조류인플루엔자와 관련된 언론보도에 대한 신뢰수준은 사육업자(2.86)에서 비사육업자(3.43)보다 낮게 나타났다(p<0.05). 조류인플루엔자 유행을 인지한 경우 신고의지는 사육업자 71.4%, 비사육업자 90.0%로서 전자에서 낮게 나타났다(p<0.05). 신고의지가 없는 사람들에서 신고하지 않겠다는 이유로는 사육업자는 ‘신고시 감수해야 하는 경제적 손실에 대한 우려’가 87.5%로서 가장 많았다. ‘언론보도에 대한 신뢰도’는 ‘제3자 효과’와 상관성이 있는 것으로 나타났다(p<0.05). 조류인플루엔자에 대한 관심도나 심각성에 대한 인지수준이 높을수록 제 3자 효과는 증가하며 제3자 효과가 증가할수록 언론보도에 대한 신뢰도는 감소하는 것으로 나타났다(p<0.05). 결론 : 조류인플루엔자와 관련된 질병관리 문제들을 해결하기 위해서는 가금류 사육업자의 조류인플루엔자에 대한 올바른 인식 및 지식의 습득뿐만 아니라 언론보도의 내용이나 방향성에서 정확한 정보 제공과 더불어 사육업자의 심리 및 감성을 고려하여야 할 것으로 사료된다.

• Journal of Preventive Medicine and Public Health
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• 제43권4호
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• pp.341-351
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• 2010

The purpose of this study was to estimate the socioeconomic costs resulting from alcohol drinking among adolescents as of 2006 from a societal perspective. Methods: The costs were classified into direct costs, indirect costs, and other costs. The direct costs consisted of direct medical costs and direct non-medical costs. The indirect costs were computed by future income losses from premature death, productivity losses from using medical services and reduction of productivity from drinking and hangover. The other costs consisted of property damage, public administrative expenses, and traffic accident compensation. Results: The socioeconomic costs of alcohol drinking among adolescents as of 2006 were estimated to be 387.5 billion won (0.05% of GDP). In the case of the former, the amount included 48.25% for reduction of productivity from drinking and hangover, 39.38% for future income losses from premature death, and 6.71% for hangover costs. Conclusions: The results showed that the socioeconomic costs of alcohol drinking among adolescents in Korea were a serious as compared with that of the United States. Therefore, the active interventions such as a surveillance system and a prevention program to control adolescents drinking by government and preventive medicine specialist are needed.

• 복식문화연구
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• 제22권5호
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• pp.809-822
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• 2014

The purpose of this study was to investigate male adult' appearance management behavior according to objectified body consciousness. The subjects were 648 male adults aged from 20 to 59 and measuring instruments consisted of objectified body consciousness, appearance management behavior, and subjects' demographics attributions. The data were analyzed by Cronbach's ${\alpha}$, factor analysis, cluster analysis, multiple response analysis, cross tabs analysis, ${\chi}^2$ test, and t-test. The results were as follows. First, 3 dimensions (body shame, body surveillance, and control belief) were emerged on objectified body consciousness, and subjects were divided into 2 groups (objectified group, and non-objectified group) by this variable. Second, male adults were deeply aware of the need of appearance management, and showed the high level of intention to perform appearance management behavior. Third, objectified group showed much more active appearance management behavior than non-objectified group. This results concluded that objectified body consciousness is a very useful variable to understand male adult' appearance management behavior.

• 대한간호학회지
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• 제43권2호
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• pp.287-295
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• 2013

Purpose: The purpose of this study was to identify vancomycin-resistant enterococcus (VRE) colonization rate in patients admitted to the intensive care unit (ICU), associated risk factors and clinical outcomes for VRE colonization. Methods: Of the 7,703 patients admitted to the ICUs between January, 2008 and December, 2010, medical records of 554 VRE colonized and 503 uncolonized patients were reviewed retrospectively. To analyzed the impact of colonization on patients' clinical outcomes, 199 VRE colonized patients were matched with 199 uncolonized patients using a propensity score matching method. Results: During the study period, 567 (7.2%) of the 7,703 patients were colonized with VRE. Multivariate analysis identified the following independent risk factors for VRE colonization: use of antibiotics (odds ratio [OR]=3.33), having bedsores (OR=2.92), having invasive devices (OR=2.29), methicillin-resistant Staphylococcus aureus co-colonization (OR=1.84), and previous hospitalization (OR=1.74). VRE colonized patients were more likely to have infectious diseases than uncolonized patients. VRE colonization was associated with prolonged hospitalization and higher mortality. Conclusion: Strict infection control program including preemptive isolation for high-risk group may be helpful. Further research needs to be done to investigate the effects of active surveillance program on the incidence of colonization or infection with VRE in the ICU.

• 제어로봇시스템학회논문지
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• 제22권4호
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• pp.281-287
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• 2016

In this paper, we propose a novel compact surveillance throwing robot which has an omnidirectional shock absorption mechanism and an active control part of wheel treads to stabilize the dynamic posture of a miniature sphere type throwing robot. This throwing robot, which weighs 1.14kg and is 110mm in height, is designed in a spherical shape to be easily grabbed for throwing. Also, the omnidirectional shock absorbing aspect is designed using several leaf springs connected with inner and outer wheels. The wheel treads control part consists of a link mechanism. Through the field experiments, this robot is validated to withstand higher than 17Ns of omnidirectional impulse and increase the stabilized max speed three times from 11 rad/s to 33rad/s by increasing wheel treads.

• 한국군사과학기술학회지
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• 제9권2호
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• pp.11-19
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• 2006

The underwater electromagnetic signatures of a naval ship are mainly generated from three sources which are the permanent and induced magnetic field in the ship's hull and other ferrous components, the cathodic current electromagnetic field established by the Impressed Current Cathodic Protection(ICCP) system or the Sacrificial Anode and the stray electromagnetic fields generated by onboard equipment. These signatures can be minimized by certain design methods or installation of signature reduction equipment. In this paper, we represented the characteristic of the underwater electromagnetic signature and the signature reduction techniques for a naval ship. Also, we measured the electromagnetic field changes emitted from the real ship using the Electric and Magnetic field Measurement System(EMMS). We found that the underwater electromagnetic signature for a naval ship can be used as input or trigger signal in a surveillance system and an influence mine.

• Journal of Preventive Medicine and Public Health
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• 제52권1호
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• pp.66-70
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• 2019

Objectives: In the Republic of Korea (ROK), the notified incidence of tuberculosis in foreign-born individuals (NITFBI) has increased recently, as has the rate of multidrug-resistant (MDR) and rifampicin-resistant (RR) tuberculosis in foreigners staying in the ROK. As Jeju Province in ROK has a no-visa entry policy, control programs for NITFBI should be consolidated. The aim was to evaluate the status of NITFBI, with a focus on the distribution of MDR/RR tuberculosis by nationality. Methods: Data on tuberculosis incidence in individuals born in Jeju Province and in foreign-born individuals were extracted from the Korean Statistical Information Service of Statistics Korea, and the Infectious Disease Surveillance Web Statistics of the Korea Centers for Disease Control and Prevention, respectively. Results: Among all notified incident cases of tuberculosis, the proportion of NITFBI increased from 1.46% in 2011 to 6.84% in 2017. China- and Vietnam-born individuals accounted for the greatest proportion of the 95 cases of NITFBI. Seven cases of MDR/RR tuberculosis were found, all involving patients born in China. Conclusions: In Jeju Province, ROK, NITFBI might become more common in the near future. Countermeasures for controlling active tuberculosis in immigrants born in high-risk nations for tuberculosis should be prepared in Jeju Province, since it is a popular tourist destination.

• Journal of Veterinary Science
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• 제24권1호
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• pp.5.1-5.16
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• 2023

The H9N2 avian influenza (AI) has become endemic in poultry in many countries since the 1990s, which has caused considerable economic losses in the poultry industry. Considering the long history of the low pathogenicity H9N2 AI in many countries, once H9N2 AI is introduced, it is more difficult to eradicate than high pathogenicity AI. Various preventive measures and strategies, including vaccination and active national surveillance, have been used to control the Y439 lineage of H9N2 AI in South Korea, but it took a long time for the H9N2 virus to disappear from the fields. By contrast, the novel Y280 lineage of H9N2 AI was introduced in June 2020 and has spread nationwide. This study reviews the history, genetic and pathogenic characteristics, and control strategies for Korean H9N2 AI. This review may provide some clues for establishing control strategies for endemic AIV and a newly introduced Y280 lineage of H9N2 AI in South Korea.