• Title/Summary/Keyword: 실현가능성

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전신 정위 프레임을 이용한 환자의 움직임 및 외부자세 setup 오차 분석

  • 정진범;정원균;서태석;최경식;지영훈;이형구;최보영
    • Proceedings of the Korean Society of Medical Physics Conference
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    • 2003.09a
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    • pp.59-59
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    • 2003
  • 목적 : 환자의 호흡에 의한 움직임 및 부정확한 환자 자세 setup 때문에 3 차원 전신 정위 방사선치료,3 차원 입체조형 방사선치료 IMRT와 같은 방사선 치료기술에서 병소에 대한 정확한 표적 위치측정은 매우 어려운 실정이다. 그러므로 본 연구는 방사선 치료시 환자의 움직임을 최대한 고정시켜 줄 수 있으며 환자 자세에 대한 setup 오차를 감소시키고 환자 전신에 산재한 병소의 위치를 좌표화할 수 있는 전신 정위 프레임 제작과 제작한 프레임에 대한 고정효과 및 재현성을 나타내는 환자 자세의 setup 오차를 평가하는데 있다. 재료 및 방법 : 자체 제작한 전신 정위 프레임 구조는 CT 영상 촬영 가능성에 중점을 두고 병소 표적의 좌표실현 및 환자체형에 따른 다양성 그리고 프레임에 대한 견고성 및 안정성 확인에 초점화하여 제작하였다. 이렇게 제작된 전신 정위 프레임에 대한 방사선 투과율 측정 실험과 CCTV 카메라와 DVR(Digital Video Recorder)를 이용해 환자 자세 변화에 대한 영상을 획득하여 matlab으로 구현한 오차분석용 프로그램으로 환자 외부자세에 대한 오차 비교 평가하고 CT 촬영에 의한 가상표적 위치측정 실험을 수행하였다. 또 한 고정벨트 추가 사용으로 인한 환자의 고정효과 정도를 살펴보았다. 결과 : 제작된 전신 정위 프레임에 대한 방사선 투과율은 마그네트론 10, 21 MeV의 에너지에서 95, 96% 의 투과율이 측정되었고 30 $^{\circ}$. 60 。각도의 경사로 빔이 전달될 때는 90.3, 94.4% 가 측정되었다. CCTV 카메라를 이용하여 흉부 및 복부의 움직임을 촬영한 영상을 Matlab프로그램으로 구현한 오차분석 프로그램을 적용한 결과, 환자 자세에 대한 오차의 평균값은 흉부의 lateral 방향에서는 3.63$\pm$1.4 mm, AP 방향에서는 2.1$\pm$0.82 mm이었다. 그리고 복부의 later의 방향에서는 7.0$\pm$2.1 mm, AP 방향에서는 6.5$\pm$2.2 mm 이었다. 또한 표적 위치측정을 위해서 환자의 피부에 임의의 가상표적을 부착하고 CT 촬영한 영상결과, 프레임으로 가상표 적에 대한 위치를 정확히 파악할 수 있었다. 결론 : 제작된 프레임을 적용하여 방사선투과율 측정실험, 환자 외부자세에 대한 오차 측정실험, 가상표적 위치측정 실험 등을 수행하였다. 환자 외부자세에 대한 오차 측정실험 경우, 더 많은 Volunteer를 적용하여 보다 정확한 오차 측정실험이 수행되어야 할 것이며 정확한 표적 위치 측정실험을 위해서 내부 마커를 삽입한 환자를 적용한 임상실험이 수행되어야 할 것이다. 또한 위치결정에서 획득한 좌표값의 정확성을 알아보기 위해서 팬톰을 이용한 방사선조사 실험이 추후에 실행되어져야 할 것이다. 그리고 제작된 프레임에 Rotating X선 시스템과 내부 장기의 움직임을 계량화하고 PTV에서의 최적 여유폭을 설정함으로써 정위 방사선수술 및 3 차원 업체 방사선치료에 대한 병소 위치측정과 환자의 자세에 대한 setup 오차측정 결정에 도움이 될 수 있을 것이라고 사료된다.

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A Study on Elementary and Middle School Teachers' Perception on the Application and Quality Management Plan of Science Curriculum according to the 2009 Revised Curriculum (2009 개정 교육과정에 따른 과학과 교육과정 적용과 질 관리 방안에 관한 초·중학교 교사의 인식)

  • Jeong, Eunyoung
    • Journal of Science Education
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    • v.36 no.2
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    • pp.354-368
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    • 2012
  • The purpose of this study was to explore the direction of application and quality management plan of science curriculum of elementary and middle school according to the 2009 revised curriculum. In order to do this, nationwide survey was administered. The subject was 126 elementary school teachers and 88 middle school science teachers. It was founded that teachers had negative opinion on the introduction of the grade cluster system. They considered that it was appropriate to link the contents of Science subject with Practical Arts(Technology Home Economics) subject by similar topic. Science classes were implemented without changing the number of class hours in most schools. They recognized the necessity of differentiated instruction in science classes, but they seldom applied the differentiated instruction. And they suggested that the teaching-learning materials, evaluation materials and contents be provided to apply the STEAM. This study designates the following strategic supports for the effective implementation of 2009 revised science curriculum; 1) the science teachers training program to provide useful information for understanding and teaching the 2009 revised science curriculum, 2) the teachers' community in the school, 3) the development and provision of the feasible STEAM plans.

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Water Governance and Basic Water Law (물거버넌스와 물관리기본법)

  • Lee, Seung-Ho;Kim, Sung
    • Proceedings of the Korea Water Resources Association Conference
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    • 2009.05a
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    • pp.385-389
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    • 2009
  • 본 연구의 목적은 물거버넌스 개념과 1997년, 2006년 물관리기본법안 분석을 통해 한국의 새로운 물관리 체제를 모색하는 것이다. 물거버넌스는 물관리정책과 계획의 수립, 시행, 평가에 있어 정부뿐만 아니라 일반 기업, 시민, 환경단체, 전문가 등 여러 이해당사자를 참여시키는 것을 핵심으로 한다. 거버넌스란 기존의 정부 주도의 정책 계획, 수립, 시행이 아닌 비정부 조직과의 타협, 협의, 논의를 통한 양방향 정책결정 과정을 뜻한다. 따라서 물거버넌스의 가장 중요한 원칙은 다양한 이해당사자 참여를 통한 정책결정의 복수화 과정이다. 한국의 물거버넌스를 시행하기 위해 가장 필요한 요건은 이해당사자 참여를 우선 중앙, 지방정부에서 그 필요성을 인식하고 법, 제도 등을 통해 제도화하는 것이다. 환경부 주도로 입안된 1997년 물관리기본법안은 물관리일원화, 적정사용, 유역관리, 비용부담, 균형배분의 5원칙을, 2006년 물관리기본법안은 물관리일원화 대신 통합물관리, 적정사용 대신 수요관리를 삽입하여 5원칙을 제시하였지만 이해당사자 참여는 원칙에 포함시키지 않았다. 이해당사자 참여 원칙의 제도화가 없이는 위의 두 법안이 제시한 원칙의 적용과 시행이 어려움에 봉착할 가능성이 높다. 왜냐하면 다른 원칙은 다양한 이해당사자 참여를 통한 사회적 합의 없이는 시행이 쉽지 않은 정치적으로 민감한 사항들이기 때문이다. 예를 들어 물의 균형배분 원칙 관련, 만약 상류와 하류 주민 간의 합의가 없이 어느 한 이해당사자의 일방적 행위가 있을 경우 큰 갈등을 유발할 수 있다. 물거버넌스을 실행하기 위해 중앙에 필요한 조직은 물이용 관련 물분쟁 발생 시 이를 조정하고 국가물관리계획을 수립하며 물관리 문제 전반을 총괄하는 조직이다. 1997년, 2006년 기본법안은 국가물관리위원회 설치를 제시하였고 2006년 기본법안에서 보다 구체적으로 위상, 운영, 역할 등에 대해 언급하였다. 하지만 국가물관리위원회는 물관련 중앙부처의 장, 지방행정조직의 장만을 포함하여 유역관리를 책임질 유역관리조직의 장에 대한 언급이 없다. 물거버넌스 실현을 위한 유역관리 시행이 바람직하기에 유역관리조직의 장도 국가물관리위원회에 참여하는 것이 바람직하다. 또한 두 기본법안 모두 국무총리실 산하에 위원회를 속하게 하였는데 이를 수정하여 대통령 직속기구로 규정하는 것이 국가물관리위원회가 정치, 행정, 재정적 압력에서 벗어나 일관성 있는 정책을 펼 수 있는 지름길이 될 것이다. 또한 지방의 물문제를 물관리계획에 적절히 반영하고 대응방안을 수립, 시행하기 위해서는 정부 관료뿐만 아니라 지방의회 의원, 환경단체, 기업, 시민, 전문가 등의 다양한 이해당사자가 참여하는 유역위원회가 필수적이다. 또한 유역 관련 물관리계획을 수립하고 사업을 추진하는 유역관리청도 필요하다. 유역위원회와 유역관리청은 유역 내 여러 이해당사자들이 물관리에 대해 다양한 의견을 개진하고 토론하며 합의점에 이르는 거버넌스를 수립할 수 있는 중요한 조직이다. 두 기본법안은 유역관리 원칙을 제시하긴 하였지만 유역관리 시행 관련 조직, 역할, 운영 등에 대해서는 언급이 없었다. 한국의 물관리는 소득, 문화 수준 향상으로 인한 양질의 물공급에 대한 요구, 시민사회의 발전, 지방분권화 등 정치, 경제, 사회의 변화를 수용하고 발전해 나가기 위해서는 여러 이해당사자의 참여와 합의에 바탕을 둔 물거버넌스 수립이 무엇보다 중요하다. 또한 이를 시행하기 위해서는 물관리기본법을 하루 속히 제정하여 제도적 기반을 갖춰 보다 효율적인 물관리시스템을 수립해야 한다.

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Impacts of An Election Pledge of Chief 3of Regional Government on the Change of Urban Spatial Structure (자치단체장의 선거공약이 도시공간구조 변화에 미치는 영향에 관한 연구)

  • Shin, Chun-Shick;Lee, Joo-Hyung
    • The Journal of the Korea Contents Association
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    • v.11 no.7
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    • pp.387-405
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    • 2011
  • A local government is not a group under central government, rather it fulfills the function independently as a economic social administrative unit. Belief and role of chief of regional government, and citizen's understanding and interest regarding importance of an election pledge are getting higher. Thus, this study researches election pledges which can be a main variable of urban plan. Especially, the study attempts to analyze impacts of election pledge on urban spatial structure and regional economic structure. When relationship between election pledge and Use Zoninig change were analyzed, the result showed that development related entire use Use Zoninig changes were related with election pledge. When it was subdivided according to each use area, relationship of use area change among election pledge and urban spatial structure found to have relatively high in resident area. In addition, relationship between population factor and election pledge was high. This can be judged as election pledge and urban spatial structure change have relationship. Particularly, sectors related with residents are expected to have high correlation. As a result, pledges regarding general welfare administrative part were a few at areas with many pledges regarding regional economic development. So, it can be classified as regional economic development oriented pledge suggesting area and welfare administrative oriented suggesting area. Through realization of these pledges, it might be able to affect urban spatial structure changes.

A Study on the Improvement of New Growth Engine Fund Management Ways by PEF Vehicle (사모투자펀드 기구를 이용한 신성장동력투자펀드 운용방식의 개선에 관한 연구)

  • Chung, Ki-Yun;Lee, Cheol-Gyu
    • Journal of Korea Technology Innovation Society
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    • v.13 no.3
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    • pp.538-557
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    • 2010
  • Korean Government has supplied small-medium enterprises with various technology financing programs such as R&D grant." loans, equities, guarantees since 1980's. The purpose of this study is to render policy suggestions for policy makers by analysing problems with regard to regulations. The suggestions of this study are such as the following. First, the current three months of the fund formation period should be extended within six months for general partners to have enough time to raise funds in the current tough capital market situation. Second, the government's non priority loss devotion system should keep going to prevent general partner's moral hazard. Third, in order to fulfill the policy purpose that is to create globally well-known companies, the government investment ratio should scale up from the current 20% to 30% of the total fund size in that the stable capital supply for core technology commercialization, industrialization and globalization of companies is achieved. Finally, general partners of the New Growth Engine Fund should showoff their investment abilities to the potential investors such as institutional investors by accumulating all track records and know-hows that prove their specialities and implementing action plans to achieve the best result of their investment. This study provides general considerations of the selection procedure, the government investment ratio, the government priority loss devotion system and so on when formating the public funds.

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Feasibility Study of Applying the Acrylic Assistant Equipment (ACR) to Reduce Patient's Discomfort in Lower Abdomen MRI Scan (하복부 MRI 검사 시 환자의 불편함을 줄이기 위한 아크릴 보조 장치 사용의 타당성 조사)

  • Park, Eunhye;Lee, Minsik
    • Journal of the Korean Society of Radiology
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    • v.12 no.4
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    • pp.475-480
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    • 2018
  • In lower abdominal MRI scan, patients have been tested by physically contacting with the body array coil. In this study, we have designed the acrylic assistant equipment (ACR) which allows the contactless scan of the patient to the coil and evaluated the feasibility by comparing the acquired images with ACR to those obtained without ACR. We tested 10 cases (F: 5, m: 5) by using the Ingenia $3.0T^{TM}$ MR system and dStreamTM torso coil (Philips Healthcare, Netherlands). We implemented T1 AX TSE and eTHRIVE (GRE) techniques. The scanned images were quantitatively and qualitatively assessed. In qualitatively, the TSE shows 4.44 and 4.56 mean values with and without the ACR and 4.34 and 4.28 at the GRE, respectively. In quantitatively, the TSE shows 12.15 CNR, 17.95 SNR and 12.71 CNR, 18.96 SNR with and without the ACR. And GRE shows 17.72 CNR, 22.59 SNR and 18.26 CNR, 24.47 SNR with and without the ACR, respectively. We have designed and implemented the acrylic assistant equipment to lower abdominal patients. Our data indicate that it is possible to obtain similar image qualities to current lower abdominal MRI scan without the physical contact to the patient.

The Socio-spatial Transformation Process Towards Multicultural Society and Limitations of 'Multicultural Coexistence' Policy of Japan (일본의 다문화사회로의 사회공간적 전환과정과 다문화공생 정책의 한계)

  • Choi, Byung-Doo
    • Journal of the Korean association of regional geographers
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    • v.17 no.1
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    • pp.17-39
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    • 2011
  • As recent inflows of foreign immigrants to relatively advanced countries in Northeast Asia have rapidly increased, Japan in particular uses 'multicultural coexistance' as a key concept for developing both discourse and policies on them. This paper is first of all to suggest a new typology of multicultural societies in the world ill order to differentiate the case of Northeast Asian countries from those of Western countries. And this paper is to suggest that foreign immigrants in Japan have different positions in labor markets and living experiences according to historical and social backgrounds as well as their nationality. The transformation process towards multicultural society is not only historical and social but also geographical and spatial, as foreign immigrants have made different spatial distribution and regional segregation in types. In order to control this socio-spatial process towards multicultural society, Japan has developed the concept of 'multicultural coexistence' similar with that of multiculturalism in Western countries. This concept seems to be quite significant as it has been initiated by local communities for symbiotic relationship between foreign immigrants and native Japanese dwellers. But it can be regarded as a strategic ideology to control foreign immigrants as it targets mainly on Nikkeijin, and is usually concerned with the cultural aspect. Seen from a theoretical point of view, this concept can be seen as closed with liberal multiculturalism as opportunity equity, but far from corporative multiculturalism as outcome equity, and it is on the process transferring from the first stage of tolerance to the second stage of legislation of nondiscrimination, while being distant from the third stage of legislation paradigmization of recognition, and hence appears to be easily reverted to assimilationism.

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Motion Estimation and Mode Decision Algorithm for Very Low-complexity H.264/AVC Video Encoder (초저복잡도 H.264 부호기의 움직임 추정 및 모드 결정 알고리즘)

  • Yoo Youngil;Kim Yong Tae;Lee Seung-Jun;Kang Dong Wook;Kim Ki-Doo
    • Journal of Broadcast Engineering
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    • v.10 no.4 s.29
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    • pp.528-539
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    • 2005
  • The H.264 has been adopted as the video codec for various multimedia services such as DMB and next-generation DVD because of its superior coding performance. However, the reference codec of the standard, the joint model (JM) contains quite a few algorithms which are too complex to be used for the resource-constraint embedded environment. This paper introduces very low-complexity H.264 encoding algorithm which is applicable for the embedded environment. The proposed algorithm was realized by restricting some coding tools on the basis that it should not cause too severe degradation of RD-performance and adding a few early termination and bypass conditions during the motion estimation and mode decision process. In case of encoding of 7.5fps QCIF sequence with 64kbpswith the proposed algorithm, the encoder yields worse PSNRs by 0.4 dB than the standard JM, but requires only $15\%$ of computational complexity and lowers the required memory and power consumption drastically. By porting the proposed H.264 codec into the PDA with Intel PXA255 Processor, we verified the feasibility of the H.264 based MMS(Multimedia Messaging Service) on PDA.

A Study on the Status and Supporting Strategy of National R&D Programs related to the Convergence Technology (융합기술 관련 국가 연구개발 사업 현황과 효과적 지원전략에 대한 연구)

  • Kim, Yun-Jong;Jung, Uk;Jeong, Sang-Ki
    • Journal of Korea Technology Innovation Society
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    • v.12 no.2
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    • pp.413-429
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    • 2009
  • As science and technology which the society requires become highly advanced and complicated, the need of so-called Convergence Technology(CovT) is getting more significant. The major developed countries are presenting their own vision and strategies of CovT to take the lead of future society and global economies. In Korea, each ministries and government offices are suggesting their own directions of promoting CovT and supporting the related programs. This paper investigates the overall status of national and international R&D activities related to CovT in order to invigorate the related national R&D programs and maximize their effectiveness. It also purports to realize the growth potential and a ripple effect of CovT, such as new business creation and fulfillment of public needs, so that secure new CovT in an early stage. Based on the analysis of the overall status of national R&D programs, we redefine and re-categorize the CovT, which is especially oriented to the development of government support policy, and present the customized strategies to each categories.

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Status and Subject of Art Therapy in the Local Social Community in the Seoul Area (서울 지역 사회복지관련 기관에서의 미술치료 현황과 과제)

  • Jang, Eun-Kyung
    • The Journal of the Korea Contents Association
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    • v.9 no.8
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    • pp.350-359
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    • 2009
  • This thesis in the social welfare-related institutions in the Seoul area, art therapy and the therapist based on the status of welfare-related agencies in the community of art therapy is to present possibilities and challenges. Research results presented by Health and Welfare, where seven of the 14 kinds of social welfare facilities, participate in the survey and the target organ, 45.1% of art therapy's role in social welfare-related institutions and gradually establish the location was the result. Art therapy is to conduct the current difficulties in institutions about the environmental factors related to a professional therapist and art therapist in the therapist's expansion as a major research and maintenance was network. Welfare-related agencies and community relationships we maintain mutual relationship, and are formed within the community have an effect on consciousness and collectivization. To provide the opportunity which realize the value in the art therapy by applying more to expand the variety of professional method. First, secure the facility of art therapy environment and the therapists. Second, if the art therapy association secures the integrated system, it makes a connection with professional therapists to improve recruitment environment in the art therapy community and therapists need to be addressed by all involved is a challenge. Third, a therapist for the duration of training in order to access a variety of academic and clinical research is the importance of the process of learning the training and supervision is to discuss the issue.