• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2010.11a
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• pp.14-17
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• 2010

Following the proliferation of three-dimensional video contents and displays, many terrestrial broadcasting companies prepare for starting stereoscopic 3DTV service. In terrestrial stereoscopic broadcast, it is a difficult task to code and transmit two video sequences while sustaining as high quality as 2DTV broadcast attains due to the limited bandwidth defined by the existing digital TV standards such as ATSC. Thus, a terrestrial 3DTV broadcasting system with heterogeneous video coding systems is considered for terrestrial 3DTV broadcast where the left image and right images are based on MPEG-2 and H.264/AVC, respectively, in order to achieve both high quality broadcasting service and compatibility for the existing 2DTV viewers. Without significant change in the current terrestrial broadcasting systems, we propose a joint rate control scheme for stereoscopic 3DTV service. The proposed joint rate control scheme applies to the MPEG-2 encoder a quadratic rate-quantization model which is adopted in the H.264/AVC. Then the controller is designed for the sum of two bit streams to meet the bandwidth requirement of broadcasting standards while the sum of image distortions is minimized by adjusting quantization parameter computed from the proposed optimization scheme. Besides, we also consider a condition on quality difference between the left and right images in the optimization. Experimental results demonstrate that the proposed bit rate control scheme outperforms the rate control method where each video coding standard uses its own bit rate control algorithm in terms of minimizing the mean image distortion as well as the mean value and the variation of absolute image quality differences.

• Korean Journal of Construction Engineering and Management
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• v.24 no.2
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• pp.98-110
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• 2023

The smart city public and private partnership project is a project to build and operate a sustainable city by investing land and capital in public-private partnership to build urban infrastructure and providing various urban services. It highly depends on the precise feasibility study and the projection of the various factors affecting the project during the planning stage to get the project successful. However, it is very difficult to predict the possibility of the project success in advance due to various physical and social factors. It is necessary to derive factors affecting the project at the planning stage and respond with appropriate analysis in order to solve these problems and to carry out a successful project. Therefore, this study derived preliminary components for feasibility study through previous studies and order status analysis and presented feasibility study components such as five-step processes, 10 process items, 19 analysis items, and 54 detailed analysis items through the Delphi method. It can be expected that this research is to contribute corresponding to diversified possible risks and facilitate the projects during the promotion.

• Informatization Policy
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• v.18 no.1
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• pp.73-99
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• 2011

The Korean military has developed and operated computer, network, communication technologies as well as war game models to strengthen the national defense M&S continuously. In particular, lots of projects for developing models for drill/training, analyses, and acquired fields are being conducted in the military. However, it needs to look into the actual conditions and seek for strategies to develop the national defense M&S. First of all, in the field of war games, various national defense architectures have been built, including war and information environment architectures starting from the resource architecture in 2006. However, the function of drill and training is limited, so additional war game architectures are required to be built. To build joint war game architectures available as an effective verification tool to implement plans of the national defense and war architectures, this study examines the actual conditions of the current war game systems and suggested building joint war game architectures.

• Korean Architects
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• no.12 s.428
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• pp.55-67
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• 2004

2년 전부터 협회 발전위원회에서 초안을 만들었던 정관 개정안이 지난 10월 임시총회 이후 법제위원회와 합동으로 2회에 걸친 워크숍 등을 거치면서 그 모습을 드러내고 있다. 그러나 밤새운 보람도 없이 아쉽게도 이사의 수와 선임문제 등에서 위원들 간의 합의를 보지 못해 단일안으로 이사회에 상정을 못하는 등 진통을 겪고 있다. 본지는 개정안이 나올 것을 전제하여 이를 다룰 예정이었으나 위와 같은 사정으로 이사 수를 증원해야 한다는 쪽과 고수해야 한다는 의견 및 제3의 안을 제시하는 위원들에게 골고루 원고를 청탁하여 그들의 당위성을 개진하고, 회원들께 이를 알려 의견을 수렴하기로 하였다. 모쪼록 이번 특집을 계기로 다양한 의견들을 하나로 모아 회원의 뜻을 반영하고 진취적인 앞날을 내다볼 수 있는 정관이 만들어지기를 기대한다.

• Communications of Mathematical Education
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• v.13 no.1
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• pp.361-379
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• 2002

본 논문은 재미있고 활동적인 기하 수업을 위한 학습자료를 제시한 것으로써 Amazing Triangle (NCTM, 1993)를 GSP를 활용하여 학교수업에서 사용할 수 있는 방안과 테셀레이션으로 확장시켜 도형의 각의 크기, 대칭과 변화, 합동 등의 학습을 통해 자연스럽게 기하에 관한 수학적 개념과 의미를 익히고 수학적 사고력과 창의력을 키우고자 하였다. 수학에 대한 정의적 측면에서의 향상과 동시에 타교과인 미술 분야에 수학이 어떻게 사용될 수 있는 가도 알 수 있다.

• 해운
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• no.5 s.51
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• pp.19-27
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• 2008

우리나라 해운산업은 21세기 국가성장 엔진으로서 그 역할을 다하기 위해서는 해운기업에 대한 세제지원정책의 지속적인 시행과 선원문제를 포함한 해운인력의 안정적 확보방안이 시급히 마련되어야 할 것으로 지적되었다. 또 선화주간 실질적인 협력관계가 구축과 다양한 사업분야에서 우리의 해운기업이 세계해운시장을 주도할 수 있는 능력을 배양할 수 있도록 자율적인 경영체제 확립이 필요한 것으로 분석되었다. 다음은 해운물류산업 발전을 위한 공동워크숍 주제발표 내용을 간추린 것이다.

• Defense and Technology
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• no.4 s.218
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• pp.64-75
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• 1997

JSF의 기술완성 노력은 예산 범위내에서 낮은 기술 리스크로 기술 및 제작발전단계에 진입하고, 종국적으로 JSF의 생산단계에 진입토록 할 수 있는 기술을 찾아내서 완성시키는 데 중점을 둔다. 기술완성 노력에서 일차적으로 중점을 두는 분야는 예산 가용성, 지원성, 생존성, 치명성 등에 크게 기여할 수 있는 것으로 확인된 기술 분야이다. 기술완성 노력은 비행시스템, 추진 기관등 기술분야를 커버하는 7개의 통합 생산팀에 의해 관리된다

• Defense and Technology
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• no.5 s.219
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• pp.52-63
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• 1997

JSF사업은 다수 군이 사용할 수 있는 공통항공기를 생산하여 항공기 전 운영기간의 운영경비를 줄이는데 중점을 두고 있기때문에 소요군 각각이 전투기를 개발하는 것에 비해 개발비를 50% 정도까지 줄일 수 있을 것으로 추정하고 있다. JSF 항공기는 공대지 임무에 중점을 두게 될 다목적 전투기로, JSF 사업실은 경합중이던 3개 업체의 사업 제안서를 제출받아 보잉, 록히드 마틴 2개업체를 선정한 바 있으며 현재는 개념 시범 단계에 진입해 있다

• Korean Security Journal
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• no.10
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• pp.173-188
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• 2005

This paper is dealing with the effectiveness to the crime prevention by the combined security system of the private security and the public security(the Police). In the western countries the public and the private security have well co-operated each other in terms of the job distribution. But our country's The private security has not much serviced in the crime prevention. The public security system has in limited capability to prevent the crime, therefore the co-production through with the private security industry and the community network are required to prevent and reduce the crime we are facing on. The followings are the result of survey on the prevention of crime through The combined security system(co-production) of The police, the private security and the community network; 1) The private security could be a big help to the police work if the two system can be co-operated smoothly. 2) The crime prevention could be not good worked out if police work would only be in the upper level class. 3) The job satisfaction is a positive if the co-operation between the police and the private security is on well.

• Journal of the Korean Data and Information Science Society
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• v.28 no.4
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• pp.853-862
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• 2017

In this study, we analyse the determinants of the youth employment rate of public agencies and local public enterprises. On the other hand the youth employment rate contains information of the youth employment rate and the size of the youth employment. We use pooled tobit model and panel tobit model since dependent variable is a censored form observed only in a certain area. The results of the analysis are summarized as follows. First, the panel tobit model is more statistically significant as compared to the combined tobit model. Second, the youth employment rate is more statistically significantly higher in 2014 and 2015 than in 2011. Third, the youth employment rate in public enterprises is more statistically significantly higher than that in local public agencies. Finally, the higher the average wage is, the lower the youth employment ratio is.