• East Asian Economic Review
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• 제20권1호
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• pp.37-65
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• 2016

This research intends to investigate the progress made in East Asian bond market integration thus far. Price-based measures (AAD indicator and beta-convergence measure), quantity-based measures and econometric techniques (co-integration test, error correction model based Granger causality test) are employed in the analysis. Even though East Asian government bond markets have become more integrated since 2001, the differentials among the markets still remain significantly high. The bond market integration process seems slow. The convergence of bond markets sped up in 2003 and after the 2008 world financial crisis, implying the important role of government policies in integrating the regional bond markets. East Asian bond market integration may need more government-directed measures.

• Journal of information and communication convergence engineering
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• 제9권1호
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• pp.55-58
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• 2011

In this paper we introduce an improved method to measure saliency values of pixels from an image. The proposed saliency measure is formulated using local features of color and a statistical framework. In the preprocessing step, rough salient pixels are determined as the local contrast of an image region with respect to its neighborhood at various scales. Then, the saliency value of each pixel is calculated by Bayes' rule using rough salient pixels. The experiments show that our approach outperforms the current Bayes' rule based method.

• 한국산학기술학회논문지
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• 제10권4호
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• pp.895-899
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• 2009

본 논문에서는 컨버전스 시대에 새로운 비즈니스 기회를 창출하기 위하여 고령화 사회에 대응하기 위한 로봇사업의 비즈니스 모델을 개발하고자 한다. 컨버전스 사회와 고령화 사회의 마켓 동인을 확인하기 위하여, 이들의 트렌드를 분석한다. 마켓의 가치사슬의 구성과 분석을 통하여 본 연구에서는 유비쿼터스, 헬스 그리고 로봇이 통합된 컨버전스 서비스 형태의 u-health 로봇에 초점을 맞추어 비즈니스 모델을 설계한다. 추가적으로 기술개발과 마켓을 축으로 제안된 비즈니스 모델의 진화 경로에 대하여 기술한다 마지막으로 제안된 비즈니스 모델의 효과성을 측정하고 평가하기 위한 매트릭스 기반의 평가 프레임워크를 개발한다.

• Journal of information and communication convergence engineering
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• 제17권1호
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• pp.84-90
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• 2019

Applications of unmanned aerial vehicles (UAVs) in the military environment have become popular because they require minimum human contribution and can avoid accidents during missions. UAVs are employed in various missions such as reconnaissance, observation, aggression, and protection. Consequently, counter-measures, known as anti-drone technologies, have been developed as well. In order to protect against threats from anti-drone technologies and enhance the survivability of UAVs, this study proposes an evasive measure. The proposed bio-inspired evasive maneuver of a UAV mimics a dragonfly's irregular flight. The unpredictable UAV movement is able to confuse enemies and avoid threats, thereby enhancing the UAV's survivability. The proposed system has been implemented on a commercial UAV platform (AR Drone 2.0) and tested in a real environment. The experiment results demonstrate that the proposed flight pattern has larger displacement values compared to a regular flight maneuver, thus making the UAV's position is difficult to predict.

• 터널과지하공간
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• 제23권2호
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• pp.110-119
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• 2013

터널 시공 중 천단침하와 내공변위를 측정하는 것이 일반화되어 있다. 터널 시공 중 계측기를 설치한 후 첫 번째로 측정한 천단침하와 내공변위의 1일간 변위량을 각각 초기천단침하속도와 초기내공변위속도로 또 마지막으로 계측한 천단침하와 내공변위를 각각 최종천단침하와 최종내공변위로 정의하고 계측한 최종변위와 초기변위속도의 관계를 분석하였다. 이를 위한 분석용 자료는 서울지하철 906공구에서 터널 시공 중 계측한 것이다. 이 터널의 폭과 높이는 각각 약 11.5 m, 10 m이며 지표에서 터널천단까지의 깊이는 약 10-20 m의 저심도 터널이다. 또 터널이 시공된 지층은 풍화토 또는 풍화암으로 연약한 지반이다. 터널은 상하반으로 나누어 시공되었고 길이는 1,820 m이다. 이번 분석에 이용한 계측치는 터널 상하반 시공 중에 얻은 것으로 천단침하계측 결과가 184개, 내공변위계측 결과는 258개이다. 분석결과 풍화토의 터널에서 초기변위속도와 최종변위가 상대적으로 큰 경향이 있었다.

• 한국멀티미디어학회논문지
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• 제20권8호
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• pp.1200-1207
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• 2017

Sensors in a smartphone can be used to measure various physical quantities. In this paper, we propose an object localization scheme in a three dimenstional using a smart phone. The proposed scheme estimates the location of an object by observing it from several different points. The direction to the target object and the locations of the observation points are collected at each observation point using the location sensor and the orientation sensor in the smartphone. Based on these observations, the proposed scheme derives three dimensional line of sight vectors and estimates the location of the target object that minimizes the estimation error. We implemented the proposed scheme on an Android smartphone and tested its performance by estimating the height of a building and characteristics of the proposed approach.

• 한국정보기술학회 영문논문지
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• 제10권1호
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• pp.99-109
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• 2020

As environmental pollution has become severe due to the rapid increase in pollutant generation in the air, measurement, collection, and analysis of atmospheric environment information plays an important role. However, it is difficult to measure the high-resolution and real-time atmospheric environment of the cities and tourist spots with high population mobility only by measuring equipment of stationary measuring stations. Therefore, this paper proposes a portable atmospheric environment measurement system for real-time measurement and monitoring of atmospheric environment information. The proposed system is a portable client with a low-power wireless communication method. It is possible to reliably transmit and receive the measured data through a multi-threaded server to monitor the trend of pollutants in the air in real-time.

• 중소기업융합학회논문지
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• 제5권1호
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• pp.31-35
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• 2015

클라우드 컴퓨팅은 인터넷 기반 컴퓨팅 기술이다. 인터넷을 중심으로 서비스를 주고받는 형태이다. 비용이 절약되고, 쉬운 사용이 가능하기 때문에 많은 기업들이 이용하고 있는 추세이다. 클라우드의 형태로는 public cloud, private cloud, hybrid cloud가 있다. 서비스 모델에는 SaaS, PaaS, IaaS가 있다. 클라우드 컴퓨팅은 쉬운 사용이 가능한 만큼 보안 취약점을 가지고 있다. 특히 가상화와 정보집중화에 따른 취약점이 있다. 이를 극복하기 위해서는 새로운 보안 기술이 개발되어야한다. 또 다른 극복 방법은 보안 책임을 분명히 해야하고, 정책을 통일화 해야 한다.

• 한국산업융합학회 논문집
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• 제23권4_2호
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• pp.637-644
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• 2020

Because suicide accidents sometimes were happened in grand bridges over rivers or sea water recently, it will be necessary that prevention measures be made preparation in advance from now on. Additional safety facilities must be needed in addition to existing safety facilities in such a way as this prevention measure. In order to make cable-stayed bridge safe on wind for additional safety facilities, main girder models with added safety facilities for wind-tunnel tests was made, and wind tunnel experiments was carried out to measure aerodynamic force coefficients. Also, wind-resistant analyses of 3D cable-stayed bridge were performed on the basis of wind-tunnel test results. From the wind experiments, force coefficients of main girder with added safety facilities were assessed, and it is known that there are little possibility of galloping and rotation of steel main girder. Finally, from the wind resistant analyses, it was concluded that wind-resistant safety of cable-stayed bridge was secured on wind speed 60.6m/sec.

• 한국발생생물학회지:발생과생식
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• 제21권3호
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• pp.259-267
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• 2017

Present study aimed to determine the effect of 'bitter melon', a popularly used fruit in Bangladesh and several other Asian countries, on high-fat-diet-induced type 2 diabetes. To investigate the effect, ethanol extract from bitter melon (BME) as a dietary supplement with mouse chow was used. BME was found to significantly attenuate the high-fat diet (HFD) -induced body weight and total fat mass. BME also effectively reduced the insulin resistance induced by the HFD. Furthermore, dietary supplementation of BME was highly effective in increasing insulin sensitivity and reducing hepatic fat and obesity. These results indicate that BME could be effective in attenuating type 2 diabetes and could therefore be a preventive measure against type 2 diabetes.