• Proceedings of the Korea Water Resources Association Conference
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• 2009.05a
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• pp.1537-1540
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• 2009

홍수통제소는 수문조사, 하천유량관리, 홍수예보 등 다양한 업무를 수행하고 있다. 수문조사는 물 관리를 위한 기본 자료 확보와 수자원이라는 국가의 귀중한 자산을 정량화하는 중요한 업무이다. 하천유량 관리는 하천의 물을 합리적으로 관리하여 공익을 증진하고 모든 사람들이 혜택을 고루 향유할 수 있도록 배분하는 업무이다. 홍수예보는 큰 비에 의해 유역에서 발생할 수 있는 홍수의 규모를 예측하고 그 수치를 유관기관에 제공하여 홍수를 사전에 대비토록 함으로써 홍수피해를 최소화 할 수 있도록 하는 업무이다. 상기 언급된 홍수통제소의 주요 업무들을 효율적으로 수행하기 위하여 낙동강홍수통제소에서는 전년도 시험연구과제로서 "홍수통제소 발전방안"이라는 주제로 낙동강 홍수통제소의 발전을 위한 기본적인 개선항목 중 홍수통제소 홍보동영상 제작을 통한 통제소 홍보 및 이미지 제고, 수자원 자료실의 전산화와 관측소 이력 및 기본제원 시스템화 등을 통한 업무의 효율성 증대를 위하여 연구를 수행하였다. 금년은 지난해 개선된 업무들을 토대로 업무 효율성 증대를 도모하고자 한다. 현재 낙동강홍수 통제소에서 관리되고 있는 수문관측소는 239개소(수위 및 우량, 10분 단위)으로, 이들 관측소에 대한 효율적인 관리와 정확한 자료 생성을 위해서는 해당 내용에 대한 체계적이고 합리적인 관리가 필요하다. 이를 위하여 관측소 이력관리 프로그램을 시험적으로 운영을 하여 매년 실시되는 분기별 관측소 정기점검 결과를 업로드 시켜 관련 직원들이 내용을 공유할 수 있도록 추진하고 있다. 이는 수문자료의 정확한 검보정에도 활용될 수 있을 뿐만 아니라 다양한 정보를 체계적으로 관리하여 향후 추가적인 업무 효율화를 위하여도 이용될 수 있을 것이다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.24 no.7B
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• pp.1384-1392
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• 1999

A high compression rate is required to transmit video sequences over low bit rate networks such as low bit rate communication channels. When highly compressed videos are transmitted over mobile channels of high error rate, bitstreams corrupted by channel errors are not only difficult to be decoded, but also have fatal effects on the other parts of the bitstreams. In this Paper, we propose an error concealment algorithm for recovering the blocks which can not be decoded due to damaged bitstreams. The proposed error concealment algorithm recovers the damaged blocks using the information of adjacent blocks which are correctly decoded. In the proposed algorithm, the motion vector of the damaged block is estimated using the overlapped block motion compensation(OBMC) and block boundary matching(BBM) techniques. Experiment results show that the proposed algorithm exhibits better performance in PSNR than existing error concealment methods.

• Journal of Broadcast Engineering
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• v.6 no.1
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• pp.82-97
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• 2001

In this paper, we describe a software implementation of a digital TV stream analyzer that can be used for analyzing and verifying digital TV bitstreams on personal computes. It accepts as input MPEG-2 transport streams (TS's) already stored on hard disks and doesn't require any special hardware. After classifying TS packets into program specific information(PSI) TS section auido, video, program clock reference (PCR) private data and null packets, it displays their contents through a graphic user interface along with the syntax elements of the TS header. Also it displays the decoded I frame nearest in time axis the TS packet currently shown This feature helps pin pointing the specific location of problematic parts in bitstreams. The bitsteam analyzer provides the compliance test of MPEG-2 Systems standard and the data injection functionality with which one can easily insert additional data to existing MPEG-2 bitstreams. Using the resulting system one can produce at low test streams for interactive broadcasting and data broadcasting for laboratory use.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.5
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• pp.240-248
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• 2020

Over the past 20 years, brain science has developed rapidly thanks to new technologies such as functional magnetic resonance imaging (fMRI), leading to more accurate knowledge of human nature and behavioral changes. This knowledge is also actively applied in the field of management. This research aimed to gain insights into how neuroscience can be incorporated into management through the case of Midas IT Co. This construction software company has a separate organization with the purpose of studying brain science, and it makes and implements human resource management policies based on brain science. The founder Lee Hyung-woo has a humanist management philosophy, and the company's brain science research supports that philosophy. The case study method was adopted as the research method, and procedures such as interviews and direct observation, participation observation, and document information were carried out. The company's human resource management system can be explained by a brain science model called "SCARF", which combines various neuroscience discoveries. As this model suggests, the company has improved the trust and satisfaction of its members by reducing threat of status and by increasing certainty, autonomy, relationship, and fairness in the workplace, resulting in the creation of a platform for creativity, integrity, and high performance.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.6
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• pp.2793-2800
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• 2011

The purpose of this research is to develop and optimize a lane departure warning application based on a smartphone which can be applicable as a new platform for various mobile information applications. Recently, a lane detection warning system which is a representative application among safe driving assistant solutions is being commercialized. Due to the necessity of powerful embedded hardware platform and its price, its market is still not growing. In this research, it is proposed to develop and optimize a lane departure warning application on iPhone 3GS. OpenCV is used for efficient image processing, and for lane detection a heuristic algorithm based on Hough Transform is proposed. The application was developed under Macintosh PC platform with Xcode 3.2.4 development tools, downloaded to the iPhone and has been tested on the real paved road. The experimental result has shown that the detection ratio of the straight lane was over 90% and the processing speed was 1.52fps. For the enhancement of the speed, a few optimization methods were introduced and the fastest speed was 3.84fps. Through the improvement of lane detection algorithm, additional optimization works and the adoption of a new powerful platform, it will be successfully commercialized on smartphone application market.

• Proceedings of the Korea Contents Association Conference
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• 2015.05a
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• pp.317-318
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• 2015

다감각 자극을 사용한 유치원 교육콘텐츠 서비스를 제공하기 위해 머리중심적 움직임 분석을 사용한 감성인식 기술을 개발하였다. 유치원 교육콘텐츠는 청각/후각/시각 등의 다감각 자극을 통해 교육서비스의 효과를 극대화하기 위한 목적으로 제작되었다. 본 연구에서는 다감각 자극동안 유치원생들의 감성유발을 측정하여 교육서비스 효과를 검증하는 것을 목적으로 인식기술을 개발하였다. 개발한 인식기술은 카메라를 사용하여 상단영상을 측정하고, 머리중심점 움직임을 지속적으로 측정하여 분석함으로써 유발된 감성을 인식한다. 또한 감성인식 결과는 다감각 자극을 제어하는 시스템에 전달되어 다감각 자극을 제시하기 위한 정보로 활용된다. 본 연구의 결과로 교육콘텐츠의 감성유발 결과를 평가할 수 있으며, 효과를 극대화 하기 위한 도구로써 활용가능하였다. 더욱이, 교육콘텐츠 뿐만 아니라 다양한 콘텐츠 서비스 공간에 적용하여 효과 검증 및 서비스 효과 증가에 활용될 수 있는 기술로써 가치가 있을 것으로 예상된다.

• Cartoon and Animation Studies
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• s.31
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• pp.29-55
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• 2013

In the contemporary modern society, information and knowledge generate a set of new social values. These changes demand a transformation not only in socio-cultural and educational spheres, but also, specifically, in the field of culture and art education. Culture and Art education emphasizes the integration and cross-discipline of other related fields which have great impact on culture and arts. This study applies theoretical analysis of Animation education in the context of culture and art education. Animation education takes an interdisciplinary approach to integrate various subjects in the field of culture and art education. Animation, as a form of culture and art education, plays an educational role in the social classroom. Animation education should be developed and expanded to become a regular classroom course. The goal of Animation education is to pursue and develop a connection with other educational courses of study. In order to strengthen the role of Animation education, we should first re-structure the pedagogical role of Animation education. Secondly, Animation education needs to become a diversified and popularized education. Third, the cultivation of creative human resources is considered of vital importance to Animation education. Finally, the expansion of infrastructure and the establishment of a comprehensive support system for Animation education has to be established.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.19 no.2
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• pp.381-389
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• 1994

In the communication network, multimedia service such as high quality voice, high speed data, image etc. will be added to the existing service. This service generates new requirements for the communication networks. The priority control mechanism can be used to control multimedia traffics generated by many communication systems. The priority mechanism which assigns prioirities to generated cells according to service quality is one of the traffic control. The priority assignment can be divided by priority criterion for each traffic characteristics such as loss sensitivity and delay sensitivity. In this paper, we alnalyzed the partial buffur sharing (PBS) mechani느 as a traffic control reducing the cell loss, and proposed analysis method. We analyzed the PBS mechanism using classical approach as a Markov chain. In order to validata proposed analysis method, simulation is performed using simulation package SIMSCRIPT 11.5. From this results, we confirmed that proposed analysis method can be verified. Also, we presented cell loss probability of ATM network when this results are to be applied to ATM networks.

• Journal of Korean Society of Transportation
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• v.29 no.3
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• pp.73-82
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• 2011

Recent advancement in traffic surveillance systems has allowed the researchers to obtain more detailed vehicular movement such as individual vehicle trajectory data. Understanding the characteristics of interactions between leading and following vehicles in the traffic flow stream is a backbone for designing and evaluating more sophisticated traffic and vehicle control strategies. This study proposes a methodology for estimating rear-end crash potential, as a probabilistic measure, in real-time based on the analysis of vehicular movements. The methodology presented in this study consists of three components. The first predicts vehicle position and speed every second using a Kalman filtering technique. The second estimates the probability for the vehicle's trajectory to belong to either 'changing lane' or 'going straight'. A binary logistic regression (BLR) is used to model the lane-changing decision of the subject vehicle. The other component calculates crash probability by employing an exponential decay function that uses time-to-collision (TTC) between the subject vehicle and the front vehicle. The result of this study is expected to be adapted in developing traffic control and information systems, in particular, for crash prevention.

• Journal of the Korean Institute of Telematics and Electronics
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• v.26 no.7
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• pp.157-165
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• 1989

To recover three dimensional information in Shape from Texture, the distorting effects of projection must be distinguished from properties of the texture on which the distortion acts. In this paper, we show an approximated maximum likelihood estimation method in which we find surface orientation of the visible surface (hemisphere) in gaussian sphere using local analysis of the texture. In addition, assuming that an orthogonal projection and a circle is an image formation system and a texel (texture element) respectively, we drive the surface orientation from the distribution of variation by means of orthogonal projection of a tangent direction which exists regularly in the arc length of a circle. We present the orientation parameters of textured surface with slant and tilt in gradient space, and also the surface normal of the resulted surface orientationas as needle map. This algorithm is applied to geographic contour (artificially generated chejudo) and synthetic texture.