• 제목/요약/키워드: Mutual Effect

검색결과 629건 처리시간 0.028초

적응 배열 안테나를 이용한 DSRC와 ETC 상호간 간섭 제거에 관한 연구 (The Study of Interference Cancellation between DSRC and ETC with Adaptive Array Antenna)

  • 정재승;이병섭
    • 한국전자파학회논문지
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    • 제11권7호
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    • pp.1147-1155
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    • 2000
  • ITS의 다양한 서비스를 위한 5.8GHz 주파수 대역에서의 무선 통신 시스템의 설치는 상호간의 간섭을 발생시키며, 그 대표적인 경우로서 이종 통신 시스템인 DSRC 시스템과 ECT 시스템의 주파수 공유는 상호간의 간섭으로 인하여 양쪽 또는 한쪽 시스템이 통신 오류나 통신 방해를 받게 된다. 이에 대한 해결책으로 차단벽(Shield Plate), 안테나 지향성(Antenna Directionality), 전력 제어(Power Control)의 이용 등이 제안되고 있으나, 이것은 원하는 사용자와 간섭원의 위치에 대한 정보를 RSU에서 가지고 있지 않으므로, 완전한 해결책이 괼 수 없다. 그러므로, 본 논문에서는 원하는 사용자에 대해서는 상대적으로 높은 이득을 취하고, 간섭원의 방향으로는 null을 형성하는 적응 배열 안테나를 DSRC, ECT 시스템의 상,하향 링크에 적용함으로써, 두 시스템에 미치는 간섭의 영향이 약 20dB 감쇄된 것을 BER 성능을 통해 보인다.

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스트레이트 퍼머 및 매직 스트레이트 퍼머에 의한 모발의 변화 (Changes of the hair's by straight permanent and magic straight permanent)

  • 이정은;홍정민
    • 한국패션뷰티학회지
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    • 제1권1호
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    • pp.133-142
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    • 2003
  • As you see, there's no difference of the hair's before and after Magic straight permanent on the example A's hair's thickness, the rate of the tense and the C's rate of the tense, but we can find that there are a lot of difference of the A's strength of the hair, the B's hair's thickness, the strength of the hair, the rate of the tense, the C's hair's thickness, and the strength of the hair on the before and after the Magic straight permanent. That is to say, there are more damage on the condition of normal hair than the one after the Magic straight permanent. On the change of the hair's physical character, before the permanent, the hair's schedule was regular and had the healthy head skin of clear mutual boundary But after the Magic straight permanent wave, the hair's schedule changed to unregural, had unclear mutual boundary of the head skin and the schedule was taken off so the cortex showed up and so on, every condition of the damage was very heavy. On the effect of the treatment, even though it gaves the worth condition of the hair, after the Magic straight permanent formally the change of the hair gives the beautiful straight.

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광대역 멀티미디어 시스템을 위한 WLAN 시스템의 간섭신호 억제방안에 대한 성능분석 (Performance analysis on the interference suppression method for WLAN system in the presence of WPAN system for Broadband Multimedia system)

  • 김성철
    • 한국정보통신학회논문지
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    • 제15권10호
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    • pp.2129-2135
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    • 2011
  • 2.4GHz 대역 무선통신망을 통해 서비스되는 WLAN과 WPAN시스템은 서로 동일한 환경하에서 상호 보완적인 서비스를 제공하고 있다. 이러한 두 시스템의 상호 패킷이 시간과 가우시안 거리의 불확실성에 존재할 경우 시스템간에 충돌이 발생하게 된다. 따라서 본 논문에서는 두 시스템간의 상호 공존의 방법을 도모하기위해 상호 간섭의 영향을 분석하고 두 서비스간의 공존을 위한 WLAN 시스템에 대한 WPAN 시스템의 간섭을 최소화하기 위한 WPAN신호 주파수 성분을 제거하기 위해 신호를 제공할 수 있도록 하는 제안된 방법에 대한 성능을 심볼 오차 확률에 대해 성능을 분석 하였다.

외상 후 스트레스 장애(PTSD)의 정신치료에 대한 양·한방 비교 고찰 (A Comparative Study between the Korean-medical and the Western-medical Psychotherapy on PTSD)

  • 박아름;박세진;손아현;허한솔
    • 동의신경정신과학회지
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    • 제29권1호
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    • pp.1-8
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    • 2018
  • Objectives: The purpose of this study is to compare the Korean-medical and the Western-medical psychotherapy on PTSD for improving the Korean-medical psychotherapy on this issue. Methods: We surveyed recent articles relating to psychotherapy on the incidence of PTSD. Results: Under the circumstances of this study, we note that applying the qigong therapeutics would be helpful when conducting relaxation training on the identified PTSD patients. We understand that taking a systematic desensitization style in the use of the kyungja-pyungji treatment is recommended. It would also be more effective to combine other treatments such as the use of the I-Jeong-Byeon-Gi Therapy and the five minds mutual restriction therapy. We have shown that by using the five minds mutual restriction therapy for the imagery rescripting has a better a synergy effect for optimum patient outcomes for patients who have been diagnosed with PTSD. Conclusions: Our study has shown that by improving the shortcomings of the Korean psychotherapy and utilizing Western psychotherapy's merits, we expect to increase the efficacy of the Korean psychotherapy with these recommendations for changes in this case.

도시재생 사례분석을 통한 커뮤니티 활성화 정책에 관한 연구 -영국·독일·한국의 도시재생 사례를 중심으로- (A Study on Community Revitalization Policy through Analysis of Urban Regeneration Cases -Focussing on the Cases of the Urban Regeneration in the UK, Germany and Korea-)

  • 장용일;김창성
    • KIEAE Journal
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    • 제16권5호
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    • pp.93-101
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    • 2016
  • Purpose : This research aims to present policy plans for community vitality in the field of the urban regeneration project by analyzing aspects for vitality via domestic and abroad city policies and cases. Methods: The research method works as follows: The first step is 1) to introduce the concept of evaluation matrix to analyze cases of urban generation, 2) to apply to the proposed evaluation matrix, and then 3) to analyze communities' decline diagnosis, counterstrategies, and promotion process. And the second step is to draw features and evaluation of cases and to present the policy plan for communities' vitality with the urban regeneration project in South Korea via a comprehensive analysis. Result : This research confirmed the fact that when different sectors is expanded toward a mutual cooperation, communities are vitalized, having a mutual effect on other related sectors by taking a part in the community positively. Especially in the base of each characteristic and estimation, when various activities and socio-economic programs with residents are promoted in the integrated system, communities are successful. Through this results we present four policy plans for community vitality of the urban regeneration project in South Korea.

An Empirical Study on the Vendor's Opportunism in the Collaboration between Buyer and Vendor

  • Hwang, Sunil;Suh, Eung-Kyo
    • 산경연구논집
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    • 제8권5호
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    • pp.53-63
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    • 2017
  • Purpose - The main feature of this study is understanding of the vendor's opportunism on the collaboration context between buyer and vendor from the buyer's viewpoint with resource dependence theory. A number of studies on opportunism have focused on opportunistic definitions and its theoretical studies. Other researches emphasize the importance of governance in ways that reduce opportunism. We think that this research could be filled with the lack of previous studies. Research design, data, and methodology - In order to accomplish research purpose, four hypotheses have been established based on the framework of resource dependence theory and previous studies. And we have used 599 survey data jointly collected by Korea Productivity Center and the Ministry of Trade, Industry and Energy. To verify these hypothesis, we have conducted multiple regression analysis with SPSS 23.0. Results - The vendor 's opportunism decreases as mutual trust with buyer becomes higher. However, as the degree of dependence of buyers on vendor resources increases, vendor's opportunism increases. And monitoring vendor's capacity has a moderating effect with buyer resource dependency to vendor's opportunism. Conclusions - This study suggest there are two options to decrease vendor's opportunism. Increasing mutual trust or decrease dependence on vendor's resources. Also, monitoring suppler's capacity could be effective when vendor's resource dependence is high.

정보이론과 시각화 방법에 의한 여론조사 분석의 새로운 접근방법 (Information Theory and Data Visualization Approach to Poll Analysis)

  • 허문열;차운옥
    • 응용통계연구
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    • 제20권1호
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    • pp.61-78
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    • 2007
  • 본 논문에서는 상호정보와 데이터 시각화를 사용하여 여론조사 결과를 분석하는 방법을 제안하였다. 여론조사의 경우, 목적 변수와 이를 위한 설명 변수가 있으며 설명 변수는 수치형과 명목형이 혼재된 형태이다. 상호정보를 사용하면 목적변수에 대한 혼합형 설명변수의 영향을 크기순으로 순위를 매길 수 있고, 데이터 시각화 방법을 사용하여 이들 순위 매김에 대한 평가를 수행할 수 있다. 여론조사에서 목적변수에 미치는 설명변수의 영향력의 크기가 어느 정도인가를 정량화한 것은 이연구에 의해서만 이루어진 것이다.

틀의 차이를 극복하기 - 수학교실에서의 논증분석 연구 - (Overcoming framing-difference between teacher and students - an analysis of argumentation in mathematics classroom -)

  • 김동원
    • 한국수학교육학회지시리즈A:수학교육
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    • 제46권2호
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    • pp.173-192
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    • 2007
  • We define mathematical learning as a process of overcoming framing difference of teachers and students, two main subjects in a mathematics class. We have reached this definition to the effect that we can grasp a mathematical classroom per so and understand students' mathematical learning in the context. We could clearly understand the process in which the framing differences are overcome by analyzing mutual negotiation of informants in specific cultural models, both in its form as well as in its meaning. We review both of the direct and indirect forms of negotiation while keeping track of 'evolution of subject' in terms of content of negotiation. More specifically, we discuss direct negotiation briefly and review indirect negotiation from three distinct themes of (1) argument structure, (2) revoicing, and (3) development patterns and narrative structure of proof. In addition, we describe the content of negotiation under the title of 'Evolution of Subject.' We found that major modes of mutual negotiation are inter-reference and appropriation while the product of continued negotiation is inter-resemblance.

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Analysis of Concept's Diversity and Proximity for Photosynthesis in Grade 7 Students

  • Lim, Soo-Min;Jeong, Jae-Hoon;Kim, Youngshin
    • 한국과학교육학회지
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    • 제32권6호
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    • pp.1050-1062
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    • 2012
  • Concepts of science have been developed by occupying 'ecological niche' within conceptual ecology. The ecological niche is determined from the mutual effect between intellectual environmental of the learner and new concept, which few studies have been conducted. This study examined how the ecological niche of the concept of photosynthesis in $7^{th}$ grade is changed by instruction. The ecological niche was analyzed using 2 methods: (1) the change in the diversity of concepts, and (2) the change in the proximity of concepts based on the frequency and the relativeness score of the concepts. The concept of photosynthesis was analyzed in the 4 domains in the place of photosynthesis, products of photosynthesis, reactants of photosynthesis, and environmental factors. The results of this study are as follows: (1) reduced diversity of concepts, (2) increased frequency and relativeness score of the scientific concepts, and (3) increased proximity of the scientific concepts by instruction. With these results, the mutual effects of the concepts within the conceptual ecology have become active by class to differentiate the relationships between the concepts, which accordingly displayed their changes in status.

국제항공화물 공급망 보안 강화를 위한 보안과 세관의 협조체계 구축방안에 관한 연구 (A Study on the Establishment of a Security and Customs Cooperation System for Reinforcement of the International Air Cargo Supply Chain Security)

  • 박만희;황호원
    • 한국항공운항학회지
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    • 제29권4호
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    • pp.142-152
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    • 2021
  • The International Civil Aviation Organization (ICAO) and the World Customs Organization (WCO) emphasize securing supply chain security through mutual cooperation between aviation security and customs by establishing a standardized security system by regulations, procedures and practices of international air cargo. Accordingly, in accordance with the Aviation Security Act, the known consignors system aims to secure cargo security before loading air cargo into the aircraft, while the customs AEO system is a public-private cooperation program that focuses on simplification of customs clearance procedures. These systems basically have the same purpose of effectively identifying high-risk cargo through a risk-based approach in international air cargo transportation and preventing risks in advance, and the content that a common basic standard for cargo security must be established is also similar. Therefore, it is necessary to establish a cooperation system by simplifying problems such as cumbersome and redundant authentication procedures and on-site verification through coordination of security requirements for mutual recognition between the two systems. As a result, it is necessary to establish a process for coordinating security and customs' supply chain security program and maximize the effect of harmonizing supply chain security by strengthening the linkage between known consignors and AEO.