• 통상정보연구
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• 제10권4호
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• pp.277-298
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• 2008

This study develops the market attractiveness assessment model and draws the strategic target markets and their corresponding exporting strategies through identifying the market positions in the dimensions of market attractiveness scores and market positional strength to achieve the innovative export promotion of Korean heavy electric industry and the resulting improvement and reversal of comparative-disadvantage position. In chapter 2, we analyze the stages of selecting target markets, the constructs and their measure variables of market attractiveness models, and the components and strategic policy implications of directional policy matrix. And in chapter 3, we identify the comparative advantage positions of Korean heavy electric industry in the global market through analyzing its trade structure, trends, balance, ratio-balance, and specialization index by the item and the region respectively. We find that the Asia/Pacific region is the most attractive export market of the Korean heavy electric equipment industry, the following important strategic target markets are the America, MENA, CIS/East Europe Regions in the order of their attractiveness and competitive position dimensions. In the mean time, the sub-Sahara Africa and West Europe region is shown to be the long-run-viewpoint target market requiring the innovation or divest strategies owing to their low attractiveness and the low market share of Korean exports.

• 한국태양광발전학회지
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• 제6권1호
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• pp.35-44
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• 2020

In line with the goal of achieving a low carbon future, the Philippines made an aspirational target which aims to increase the total installed capacity coming from renewable energy (RE) to at least 20,000 MW by 2040. The country's RE sector has progressively advanced over the years following the enactment of its comprehensive RE Law in 2008. Among other RE technologies, solar achieved the highest installation growth from 2008 to 2018. The paper seeks to assess whether the Philippines' RE target by 2040 is achievable in terms of the current status and future outlook for RE. Major roadblocks that hamper RE development are identified and discussed, including some recommendations for policy-making and energy planning.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2015년도 춘계학술대회
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• pp.649-652
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• 2015

차등서비스 네트워크의 AF(Assured Forwarding) 서비스에서 TCP 트래픽을 위한 기존 marking policy 연구는 TCP 트래픽의 RTT(Round Trip Time), 목표 전송률(target rate) 영향 등에 대한 고려가 부족하였다. 본 논문에서는 TCP 트래픽의 RTT의 영향에 의한 낮은 공평성을 개선하기 위하여 평균 전송률 예측 기반에서 TCP flow의 상태 정보를 이용한 개선된 TSW3CDM_FS(Time Sliding Window Three Color Dynamic Marker) 알고리즘을 제안한다. 제안한 알고리즘은 목표 전송률에 비례한 대역분배를 하기위한 dynamic marking policy 알고리즘이다. 제안된 알고리즘의 성능평가를 위하여 네트워크 시뮬레이터(NS-2)를 이용하여 컴퓨터 시뮬레이션을 수행하였다. 시뮬레이션 결과 제안한 TSW3CDM 알고리즘의 공평성이 기존의 TSW3CM 방식에 비해 향상된 결과를 보였다.

• 한국환경복원기술학회지
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• 제14권5호
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• pp.113-125
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• 2011

Since the government of Korea (Ministry of Environment, MOE) introduced the policy applying 'Biotope-Area-Ratio-Indicator (BARI)' to huge residential land developments which Environmental Impact Assessment (EIA) should be performed, MOE has come to have the necessity to apply the indicator concretely at the stage of Prior Environment Review System (PERS) and EIA in various types of large scale land development projects. This study was conducted with the aim of supporting the application of BARI and related decision making in various other types of EIA projects as well as residential development projects through remodeling the system to apply the indicator of the past. Through the analysis of the problems in applying the past BARI and experimental appraisals to 11 types of EIA projects, the results and implications as follows were drawn. First, it's possible to extend the range of applications of BARI, which has been applied to only residential land development project, to all kinds of projects with area-typed land use pattern out of environmental impact assessment target projects. Second, it's also possible to set a target value into which regional characteristics and differences among locational properties are reflected. In addition, it's come to be able to differentially apply the target value of BARI according to the condition of the existing site. Third, it's improved to be able to suggest a macroscopic target value at the stage of PERS and to set detailed target values in each detailed land use at the stage of EIA. The key point underlies inducing methodology to determine target values to secure more permeable land coverage ratio for detailed land use patterns at the stage of EIA by making it possible to calculate BARI of the present land cover condition of the EIA target projects.

• 한국유기농업학회지
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• 제14권2호
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• pp.117-137
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• 2006

Environment-friendly(EF) agricultural policy developed to support high-quality farm products, such as organic farm products, doing so for the sake of strengthening the competitive power of Korean agriculture after the agreement of UR. The details of the policy are as follows : enforcing certification of organic farm products, establishing of the Law of Fostering the EF agriculture, carrying out the order of direct-payment, setting up the Five Year Plan for EF agriculture, etc. This study focuses on the background of social economy, the standpoint of EF farming in agricultural policy, and the analysis of the characteristics in EF agriculture. Three aspects in the background of the policy are as follows : the social movement, the social economy, and the social system. The standpoint and characteristics of the policy are studied by the analysis of the target and means of the policy which is based on the policy documents.

• 한국노년학
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• 제40권2호
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• pp.269-289
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• 2020

본 논문의 목적은 중장년층의 활동적 노화를 지원하기 위하여 첫째, 서울특별시50플러스 정책 및 사업사례를 분석하고, 둘째, 분석 결과에 근거하여 활동적 노화와 평생학습을 추진하기 위한 정책 및 사업의 방향을 제안하는 것에 있다. 연구방법은 단일 사례연구를 활용하였으며, 사례의 분석틀은 정책 및 사업의 배경-환경, 이념-목표, 주체-대상, 과정-영역의 4가지로 접근하였다. 분석 자료는 서울특별시50플러스 정책 및 사업 관련 연구보고서와 관련 연구 자료, 재단 실무자의 간담회 발표 자료를 활용하였다. 연구결과는 다음과 같다. 정책 및 사업의 배경·환경에서는 고령사회로의 환경 변화 대응은 정책의 필수적 요소로 나타났다. 정책이념-목표에서는 '새로운 인생비전 창조'의 이념과 활동적 노화를 위한 일자리창출, 사회적 참여, 인생설계 측면의 3가지 측면의 정체성 접근이 주로 이루어지고 있다. 주체-대상측면에서는 정책의 실행 주체는 서울50플러스재단, 50플러스캠퍼스, 50플러스센터의 체계적인 3단계로 구성되어 있으나 대상은 50+세대(50~64세)로만 제한되어 있고, 희망자만 참여하는 문제점을 가지고 있다. 과정-영역 분석에서는 중장년층의 특성에 맞추어 교육지원, 일·창업 지원, 상담정보 제공, 신노년문화 창조 활동 등의 프로그램이 연계적으로 부가가치를 높이도록 설계되어 있다. 향후 제언으로는 정책 및 사업은 중장년층의 특성에 맞추고, 지역의 산업과 대학 등과 연계하여 추진하며, 대상자의 확대가 필요하고, 사업 간 가치를 높이기 위한 연계가 필요하다.

• Journal of Information Processing Systems
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• 제17권4호
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• pp.834-850
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• 2021

IT security companies have been releasing file system filter driver security solutions based on the whitelist, which are being used by several enterprises in the relevant industries. However, in February 2019, a whitelist vulnerability was discovered in Microsoft Edge browser, which allows malicious code to be executed unknown to users. If a hacker had inserted a program that executed malicious code into the whitelist, it would have resulted in considerable damage. File system filter driver security solutions based on the whitelist are discretionary access control (DAC) models. Hence, the whitelist is vulnerable because it only considers the target subject to be accessed, without taking into account the access rights of the file target object. In this study, we propose an industrial device security system for Windows to address this vulnerability, which improves the security of the security policy by determining not only the access rights of the subject but also those of the object through the application of the mandatory access control (MAC) policy in the Windows industrial operating system. The access control method does not base the security policy on the whitelist; instead, by investigating the setting of the security policy not only for the subject but also the object, we propose a method that provides improved stability, compared to the conventional whitelist method.

• 로봇학회논문지
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• 제16권2호
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• pp.137-146
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• 2021

When controlling manipulator, degree of freedom is lost in singularity so specific joint velocity does not propagate to the end effector. In addition, control problem occurs because jacobian inverse matrix can not be calculated. To avoid singularity, we apply Deep Deterministic Policy Gradient(DDPG), algorithm of reinforcement learning that rewards behavior according to actions then determines high-reward actions in simulation. DDPG uses off-policy that uses 𝝐-greedy policy for selecting action of current time step and greed policy for the next step. In the simulation, learning is given by negative reward when moving near singulairty, and positive reward when moving away from the singularity and moving to target point. The reward equation consists of distance to target point and singularity, manipulability, and arrival flag. Dual arm manipulators hold long rod at the same time and conduct experiments to avoid singularity by simulated path. In the learning process, if object to be avoided is set as a space rather than point, it is expected that avoidance of obstacles will be possible in future research.

• 교통기술과정책
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• 제9권3호
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• pp.111-117
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• 2012

• 한국시뮬레이션학회논문지
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• 제27권4호
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• pp.1-8
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• 2018

인공지능을 이용하여 목표 지점까지 제어하는 가장 대표적인 방법은 강화학습이다. 하지만 그동안 강화학습을 처리하기 위해서는 구현하기 어렵고 복잡한 연산을 처리해야만 했다. 본 논문에서는 이를 개선한 Proximal Policy Optimization (PPO) 알고리즘을 이용하여 가상환경에서 목표지점에 도달하기 위한 계획된 비행궤적을 찾는 방법을 시뮬레이션 하였다. 또한 외부 환경요소가 비행궤적 학습에 미치는 영항을 알아보기 위하여 궤적의 변화, 보상 값의 영향 및 외부 바람등과 같은 변수를 추가하고 궤적 학습 성능 및 학습 속도에 미치는 영향을 비교 분석을 수행한다. 본 결과를 통하여 에이전트가 다양한 외부환경의 변화에도 계획된 궤적을 찾을 수 있다는 것을 시뮬레이션 결과에 따라 알 수 있었으며, 이는 실제 비행체에 적용할 수 있을 것이다.