• 제목/요약/키워드: time-history analysis method

검색결과 685건 처리시간 0.034초

Change of Fractured Rock Permeability due to Thermo-Mechanical Loading of a Deep Geological Repository for Nuclear Waste - a Study on a Candidate Site in Forsmark, Sweden

  • Min, Ki-Bok;Stephansson, Ove
    • 한국방사성폐기물학회:학술대회논문집
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    • 한국방사성폐기물학회 2009년도 학술논문요약집
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    • pp.187-187
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    • 2009
  • Opening of fractures induced by shear dilation or normal deformation can be a significant source of fracture permeability change in fractured rock, which is important for the performance assessment of geological repositories for spent nuclear fuel. As the repository generates heat and later cools the fluid-carrying ability of the rocks becomes a dynamic variable during the lifespan of the repository. Heating causes expansion of the rock close to the repository and, at the same time, contraction close to the surface. During the cooling phase of the repository, the opposite takes place. Heating and cooling together with the, virgin stress can induce shear dilation of fractures and deformation zones and change the flow field around the repository. The objectives of this work are to examine the contribution of thermal stress to the shear slip of fracture in mid- and far-field around a KBS-3 type of repository and to investigate the effect of evolution of stress on the rock mass permeability. In the first part of this study, zones of fracture shear slip were examined by conducting a three-dimensional, thermo-mechanical analysis of a spent fuel repository model in the size of 2 km $\times$ 2 km $\times$ 800 m. Stress evolutions of importance for fracture shear slip are: (1) comparatively high horizontal compressive thermal stress at the repository level, (2) generation of vertical tensile thermal stress right above the repository, (3) horizontal tensile stress near the surface, which can induce tensile failure, and generation of shear stresses at the comers of the repository. In the second part of the study, fracture data from Forsmark, Sweden is used to establish fracture network models (DFN). Stress paths obtained from the thermo-mechanical analysis were used as boundary conditions in DFN-DEM (Discrete Element Method) analysis of six DFN models at the repository level. Increases of permeability up to a factor of four were observed during thermal loading history and shear dilation of fractures was not recovered after cooling of the repository. An understanding of the stress path and potential areas of slip induced shear dilation and related permeability changes during the lifetime of a repository for spent nuclear fuel is of utmost importance for analysing long-term safety. The result of this study will assist in identifying critical areas around a repository where fracture shear slip is likely to develop. The presentation also includes a brief introduction to the ongoing site investigation on two candidate sites for geological repository in Sweden.

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조선시대 왕릉 석물의 재료와 제작 방법 변화에 관한 연구 - 신도비와 표석, 상석을 중심으로 - (A Study on the Change of Materials and Fabrication Techniques of Stone Figures in Royal Tombs of the Joseon Period - Focusing on Shindobi, Pyo-Seok, and Sang-Seok -)

  • 차문성
    • 헤리티지:역사와 과학
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    • 제52권4호
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    • pp.56-77
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    • 2019
  • 비석은 상례문화의 보고이자 서예사의 정수로서 시대사·사회사를 조명할 수 있는 중요한 문화재지만 그 연구는 아직 미미하다. 특히 비각의 제작 방식에 관한 것은 아직 미증유의 분야로 남아 있어 연구가 절실한 편이다. 비석의 제작은 석재의 탁마 과정과 조각, 그리고 글씨를 새기는 북칠 과정으로 대별할 수 있다. 본고에서는 이와 관련하여 몇 가지의 사실을 밝히고 있다. 첫째, 신과 관련한 의물(神儀物)인 상석, 혼유석, 비석에는 정교한 마정(磨正) 작업을 가한다. 이는 임진왜란, 병자호란의 영향으로 인한 유교적 상·제례의 정착과 전파로 혼유석에 대한 인식의 변화에 기인한다. 둘째, 영조 때 오석(烏石)의 비약적인 확산과 사저취용(私儲取用)은 사회·문화사적으로 큰 의미를 가지고 있다. 상품(上品)의 강화석이 고갈되자 사대부에서 사용하던 오석을 천릉한 장릉에 사용한 이후 사대부들을 중심으로 퍼지게 된다. 특히 오석의 사용과 마정 작업은 화학적·물리적 손상을 최소화시킬 수 있었다. 셋째, 비석의 각자 기술은 북칠(北漆)에 있다. 효종 영릉 천릉 시에 송시열의 지문을 북칠한 이후부터 북칠 과정은 동아시아에서 우리나라가 가장 성행했고 제도화된 점은 특기할 만하다. 북칠은 오석의 검은 색으로 인해 흑묵보다 붉은 당주를 이용하면서 더욱 정교화된다. 넷째, 조선 후기에 들어서면서 각자 방식에도 변화가 일어난다. 영조 연간까지 각자는 획의 두께에 따라 각의 깊이를 결정해 음영을 표현하고 양감을 나타냈다. 물론 이 같은 기법은 모든 표석이나 신도비에서 나타나는 것은 아니나 내수사에 소속된 뛰어난 경공장들의 전습에 의해 유지되었다. 따라서 비석을 제작하기 위해서는 숙석, 연정, 마정, 정간, 초도서입, 중초, 입각, 교정, 장황의 단계를 거쳐 하나의 완성품이 이뤄진다. 이러한 것은 묘주에 대한 존경심과 공업을 알리는 목적이지만, 이를 통해 공예 기능의 분업과 협업에 바탕을 둔 작업이 표석의 전체 제작 과정에 나타난다는 사실을 알 수 있다.

천해양식어업발달과정에 관한 연구 - 기술개발활동을 중심으로 - (A Study of Technical Development of Mariculture in the Coastal Water)

  • 최정윤
    • 수산경영론집
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    • 제16권1호
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    • pp.91-124
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    • 1985
  • Mariculture is contrasted with inland aqua-culturing fisheries. It is defind as the Industry of rearing Aquaorganism in limited coastal area relatively shallow in depth. Then, It's coming into being realization of Mariculture in it is long in history that Mariculture was realized in Korea. But it is from the early part of 1960s, that this industry has normally developed. Owing to 200 miles economy-zone problems of coastal countries, the development of deep sea fishing was limited, so the Korean Government has now appreciated the importance of cultured industries in the field of coastal fisheries. And the Korean Mariculture the output of which was only 18, 000 M/T in '60s attained 540, 000M/T in 1980s, has now occupied its relative importance in Korean Fisheries Industry. So the purpose of this report is to suggest the prospect of technical development of mariculture in the future of Korea, through the analysis of the various problems that affect upon the individual management '||'&'||' fishing ground utilization, along with the appreciation of "how to extend of those technical innovation" and "how the fishermen's technique level is extended at this stage. According to this study, the result is summarized as follows. First, Maricultural technique is classified into 8 sub-techniques as follows, as shown in fig. 1.Fig. 1. The Formation structure of mariculture technique Second, the change of technical method of mariculture in coastal area of Korea has made as 5 stages; 1) Scattering of culturing organism 2) Culturing by putting stone and installing bamboo 3) Culturing by installing rope and seeding 4) Culturing of putting objectives in cages 5) Culturing fish by feed Third, the maricultural fisheries of Korea has about 70 years long in history. It began from 1910s. But at that time there was no special technique in aquaculture and its technique was confined in searching out the object of species. The species was laver, oyster ect.Forth, although realization of mariculture in Korea has been long time, it is of late from 1960s that this has been industrial with normal development, and its technique of mariculture has mainly has developed from 1970s. Its result not only contributed to the high growth in Korean ecconomy along with the well balanced development between industires, but also it played a great role for the resolution of nation's food problem. Especially maricultural production has shown its sustained annual increase of 13.8% during the last 20 years. So the portion of mariculture among total fisheries stucture was extended from 4.1% in the early 1960s to 22.4% in 1980s.Fifth, it could be safely said that such development in maricultural field is resulted from the activity of aquacultural institutes such as Fisheries Reseach '||'&'||' Development production of major kinds such as Oyster, Sea-mustard, and Laver etc. As well as in the innovation of aquaculturing method with synthetic fiber utilization. FRDA has played important role in the efficient propargation of new aquacultural technique.Sixth, as for the change in aquaculture structure and its during period between 1970s and 1980s, the private management participation shown 25% increase from household number of 45, 173 to 56, 268 in total number. And in the respect of the management scale, of their management decreased, while it showed an increase in relative large scale management, the increase over 3 employees compared with other fisheries field between '70s and 80s. This must be an major trait to be recorded, Now the data above mentioned are shown as in table 1 and 2.Table 1. The maricultural fishing ground development situation in 982.Table 2. The mariculture management as seen in the employmnet size in high seasion.Owing to the technical innovation, of the mariculture in coastal area new income of fishermen increased and it also is true that the number of fishermen participating in its industrialization increased. But the problem being from now on is the self-discharge of the destruction fishing ground considered resulted from rapid expansion in aquaculture industry and the preventive system of sentility of fishing ground. sentility of fishing ground.

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빅데이터를 활용한 공원 이용행태의 시계열분석 - 올림픽공원을 대상으로 - (Time Series Analysis of Park Use Behavior Utilizing Big Data - Targeting Olympic Park -)

  • 우경숙;서주환
    • 한국조경학회지
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    • 제46권2호
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    • pp.27-36
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    • 2018
  • 본 연구는 공원 이용자의 욕구를 파악하여 이용자에 적합한 공원 환경으로 변화되어야 할 필요성에 주목하고, 이용자의 욕구를 파악하기 위하여 행태분석의 필요성을 제기하였다. 이에 온라인 데이터(블로그)를 연구의 기초자료로 선정하고, 5년 단위로 구분하여 데이터를 수집한 후 텍스트 마이닝을 활용해 시계열적 행태의 특성을 도출하고, 사회연결망 분석을 통해 온라인 데이터의 유의성을 검증하였다. 텍스트 마이닝 분석 결과, 첫째, '길을 걷다'(산책), '사진을 찍다', '자전거(인라인, 킥보드 등)를 타다', '먹다', '공연을 관람하다'는 올림픽공원에서 행해지는 공통적인 행태로 나타났다. 둘째, 수집된 데이터의 초기에는 운동 등 적극적인 신체활동을 행태가 주를 이루었지만, 최근에는 핸드폰, 게임, 음식을 먹고 커피를 마시는 등의 소극적인 비활동적 행태도 공원에서 나타나는 새로운 행태적 특징으로 나타났다. 셋째, 공원 이용자의 행태에 영향을 미치는 요인은 인터넷 발달, 자신의 개성과 스타일을 표현하는 문화 등 사회의 여러 가지 여건의 변화로 나타났다. 넷째, 올림픽공원에서 나타나는 특별한 행태는 공연 관람 등 문화적인 활동과 역사수업 등 교육적인 활동으로 도출되었다. 결론적으로 공원 계획 설계 시 의도하였던 목적보다는 여러 가지 시대적 변화로 사람들의 라이프 스타일이 변화하고, 공원의 행태에까지 영향을 미치는 것으로 나타났다. 이에 올림픽공원의 주요 행태와 영향을 미치는 요인을 고려하여 이용자에게 적합한 환경으로 변화되어야 할 필요성이 있다. 분석방법으로 활용한 텍스트 마이닝은 과거의 데이터도 수집이 가능하다는 장점이 있어 행태 분석 시 장기적인 관점에서 분석이 가능하고, 도출된 키워드로 새로운 행태 및 가치 측정이 가능하여 이후 행태분석 연구의 영역의 확대가 가능한 것으로 판단된다. 또한, 사회연결망 분석을 통해 온라인 데이터의 타당성을 검증하여 연구결과의 신뢰를 높일 수 있었다. 추후 수집하는 데이터의 종류를 다양하게 하여 더 포괄적인 행태분석에 대한 연구가 수행되어야 하며, 대용량 데이터의 정확성, 신뢰성을 검증할 수 있는 다양한 방법에 대한 연구가 필요할 것이다.

AHP기법을 통한 다큐멘터리 영화 성공요인 중요도 분석 (A Priority of Documentary Films' Success Factor: AHP Analysis)

  • 임소연;이윤철
    • 한국콘텐츠학회논문지
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    • 제17권12호
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    • pp.644-657
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    • 2017
  • 한국다큐멘터리영화가 2010년대 접어들면서 황금기를 맞고 있는 지금, 어느 때보다도 다큐멘터리영화의 성공에 대한 관심이 집중되고 있다. 본 연구는 이에 부응하여 처음으로 다큐멘터리영화의 성공요인에 관한 연구를 진행했다. 리트만(Litman)의 영화흥행요인 세 가지 카테고리인 창조적 영역, 배급유통의 영역, 마케팅 영역에 맞게, 한국다큐멘터리영화의 사례를 접목하여, 전문가의 의견을 통한 검증작업을 거쳐 다큐멘터리영화의 12개의 성공요인을 도출했다. 또한 AHP분석기법을 적용, 다큐멘터리영화의 성공요인의 중요도를 살펴보았는데, 가장 중요한 성공요인은 창조적 영역의 영화자체가 가지는 완성도로 나타났고, 보편적 소재의 다큐멘터리는 배급, 마케팅의 요인을, 정치사회적 소재의 다큐멘터리는 전체적으로 정부의 지원과 인프라구축의 요인을 중요하게 평가했다. 온라인을 통한 참여관객의 현상을, 제작군은 높게, 배급, 마케팅군은 상대적으로 낮게 평가하는 인식의 차이를 보였다. 이러한 성공요인과 우선순위는 다큐멘터리영화 관련한 여러 분야에서 기초 자료로 활용될 것이며, 다큐멘터리 영화 실무자나 정책입안자, 그리고 연구자들에게 중요한 시사점을 줄 수 있다.

Cultural Symbolism and Acculturation of Temple Plants in China: Focused on 'Bodhi Tree'

  • Chai, Tian-Long;Rho, Jae-Hyun
    • 인간식물환경학회지
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    • 제23권5호
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    • pp.577-587
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    • 2020
  • Background and objective: Plants in temples are the results of cultural symbolization that embraces the experience and enlightenment of humans about life. As a way to improve the acceptance of the foreign religion, China gave cultural symbolization to plants in temple gardens through integration with traditional cultures and the understanding of the nature of plants themselves. This study aimed to identify cultural symbolism and signs of acculturation associated with Buddhist plants, targeting Bolisu, the most essential and symbolic plant in temple garden forests in China and Korea. Methods: The morphological and ecological characteristics of plants, functions, the texts that contained the history of Buddhism and literary works were examined through literature review, and the relation of Ficus religiosa with its planting conditions and nature, and Buddhist culture was explored. In addition, the cultural value of Buddhist plants themselves in establishing temples and the reason why Bolisu was planted in temples were reviewed through time series analysis. The obtained results were interpreted using an inductive method to identify substitutes for F. religiosa, cultural symbolism and signs of acculturation. Results: F. religiosa as one of the three holy trees and the five trees and six flowers in Buddhism is known as the original Bolisu. Since it grows well and is widely distributed in regions that accepted Indian Buddhism, it became the most representative holy tree in Buddhism. From the perspective of tree shape and nature, F. religiosa is in line with the Buddhist spirit of saving those in need with mercy and redeeming mankind, and figuratively shows that perfection can be attained like the fruit of Bolisu. Chines Buddhism had adopted highly symbolic plants for a long period of time as a means to spread the same belief and doctrines as Indian Buddhism. In China, however, there were only limited areas suitable for the growth of F. religiosa, and for this reason, borrowed Bolisu trees including Tilia. miqueliana, T. mandshurica and T. amurensis and other plants such as F. virens Ait. var. sublanceolata, G. biloba and M. alba were planted as a substitute in most regions, having been given with symbolism and belief as Bolisu. Conclusion: Chinese Buddhism planted the same plants as Indian Buddhism in order to enhance symbolism and also similar substitutes to express the same symbolism. This is a kind of acculturation and its influence and customs were not limited to China, but were introduced to Korea, The difference between China and Korea was that G. biloba was excluded from the substitute for Bolisu in Korea.

효과적인 산전관리를 위한 고객관계관리(CRM)의 도입 (The Application of Customer Relationship Management for the Effective Prenatal Care)

  • 신숙;백수경;강성홍;김유미
    • 한국병원경영학회지
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    • 제10권1호
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    • pp.93-114
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    • 2005
  • The prenatal care is the preventive medical service to help the pregnant mother deliver the healthy baby. It's regular examines give some chances to check-up the healthy conditions. This thesis concentrates on the CRM system to support an effective prenatal care system and prove the effectiveness of it. As CRM is the adapted management related to the customer's own information, it is important to develop the CRM model classified by the patients characteristics. A general hospital in Busan operated the CRM system to carry out the effective prenatal care and there is an analysis to ensure the effectiveness of CRM system for the pregnant women in our maternity ward. The results can be summarized as follows: 1) According to the comparisons with the CRM system, we can conclude the system is desirable. (1) Maternal Age : In the age distribution, the prenatal visit frequency, triple marker freqency, oral GTT and targeted ultrasonography in the experimental group in 30 to 34 years old is higher on the whole. For over 35 years old group, the higher frequency comes out in the oral GTT and targeted ultrasonography and for 25 to 29 years old group the different figure shows just in the targeted ultrasonography. (2) Area of residence: There is a clear difference in all the items in Busan and near area but no sign of difference in prenatal visits and oral GTT in other residencial area. Especially in the targeted ultrasonography the higher figure shows in the experimental group located in the both areas. The targeted ultrasonography is known as the specific examination which should be examined by the specialists, on the contrary the other examinations can be operated in the small clinic. So the public information and seminars related with ultrasonography increases the check-up frequency. The clinic requests some ultrasonographical examinations to the specialists in general hospital. (3) Parity: The clear difference shows that the CRM system causes the prenatal visit frequency to become higher in experimental group. The figure is 9.7 times and 8.6 times each. This is opposite that the past study said multiparity reduced the average prenatal visits. But the result of CRM is considered as the method to help the multiparity understand the importance of the prenatal care. (4) Obstetrical history: In the experimental group of the spontaneous delivery group, the figure is higher in the prenatal visit frequency, triple marker, oral GTT and targeted ultrasonography but the Caesarean section delivery group has higher figure in targeted ultrasonography. (5) In the first check-up, the rate of targeted ultrasonography in under 16 week pregnancy, in the 16 week pregnancy to 32 week pregnancy and the over 32 week pregnancy in the experimental group is upper than the compared one. For the oral GTT, there is a difference in under 16 week pregnancy but no difference in prenatal visits and triple marker. 2) The analysis of characteristics of prenatal care through the decision tree resulted in the fact that the most important variable is the residential area. After the delivery frequency is following, the obstetrical history and maternal age are in order. It is the same result in the triple marker and oral GTT. Consequently it is the same order of important variables in CRM system. The effectiveness of CRM system is proved in this study. The CRM system is a marketing method to control and lead the customers through the segmentation of customer data. It increases the new customer aquisition, maintenance of loyal customers, augmentation of customers value, activation of potential customers and creation of life time customers. So eventually it can enlarge the customers value. The medical institution should make efforts to establish the data base enforced by the customer's information on the underlying ordinary data system to carry out the CRM system effectively. In addition, it should develop the a variety of marketing strategy in order to set up one to one marketing satisfying the needs of individual patients.

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과거 재난사례분석을 통한 재난 의사결정 체크리스트 구성에 관한 연구 (A Study to Construct a Decision-making Checklist through the Analysis of Past Disaster Case)

  • 서경민;임상규;최우정
    • 한국재난정보학회 논문집
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    • 제16권2호
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    • pp.248-266
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    • 2020
  • 연구목적: 본 연구는 재난유형별 체크리스트 작성을 통해 해당재난에 대한 적합한 대응체계 수립과 정확하고 신속한 의사결정을 위한 방안을 제시하고자 한다. 연구방법: 체크리스트 요인 도출을 위하여 태풍재난을 대상으로 과거 사례분석(태풍 루사(2002), 태풍 매미(2003), 태풍 차바(2016))을 진행하였다. 일반적인 현황(기후·기상)정보와 사례별 특징 등을 분석하여 체크리스트 요인 도출을 위한 그룹핑(grouping)을 진행하였다. 연구결과: 사례조사를 통해 크게 국가단위(National level)와 지자체 단위(county level)로 분류하였다. 국가단위의 항목으로는 기상예보, 태풍상륙여부, 태풍강도, 태풍반경, 중심기압, 호우동반 여부, 이동속도, 이동경로 총 8개를 도출하였고, 지자체 단위에서는 지역특성을 반영해야 항목들을 중심으로 과거 유사 태풍 유무(경로 등), 태풍상륙시점, 지역특성, 인구밀집 시기, 선행재난 복구 여부, 최근 재난발생 이력, 2차 피해, 예·경보 시스템으로 총 8개 항목을 도출하였다. 결론: 재난 발생 시 본 연구에서 제안한 체크리스트를 활용·적용한다면 보다 신속한 의사결정이 이루어 질 것으로 판단된다. 또한, 재난발생시 재난실무자들의 대응계획 수립에 기초자료로 활용될 수 있을 것이며 지역특성을 반영했기 때문에 좀 더 명확하고 신속한 재난 대비·대응이 될 수 있을 것으로 사료된다.

혈청 총 콜레스테롤과 체질량 지수, 혈압, 생활습관과의 관련성 (A Study on the Correlation Among Total Serum Cholesterol Level, Blood Pressure, Body Mass Index, and Lifestyle)

  • 최소영;주영희;오진경;류은정;김정순;강영실
    • 성인간호학회지
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    • 제17권1호
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    • pp.149-159
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    • 2005
  • Purpose: The purpose of this study was to examine the relationship among the levels of total serum cholesterol level, blood pressure, body mass index, and lifestyle. Method: This study was designed as a descriptive correlation study. Subjects were 972 adults participated voluntarily living in GyeongNam. The height, weight, blood pressure and fasting serum cholesterol were measured. Body mass index was caculated. Information on general characteristics (age, gender, education, job, family history) and life style(cigarette, alchol, sleeping time, regular exercise, meal pattern, peppery, salty, sweetness, vegetable diet, meat diet) were collected using a questionnaire by interviewing method. Result: The mean value of total serum cholesterol was $197{\pm}36.4mg/dl$(mean; $189{\pm}36.7mg/dl$, women; $202{\pm}35.1mg/dl$). By simple analysis, the serum total cholesterol according to general characteristics features was statistically significant in age(F= 6.765, p=000) and gender (t=5.372, p=.000). Total serum cholesterol levels increased significantly with increasing BMI. The serum total cholesterol according to life style features was statistically significant in cigarette(${\chi}^2=12.12$, p=.016), exercise(${\chi}^2=6.335$, p=.042), salty taste(${\chi}^2=18.801$, p=016), vegetable diet (${\chi}^2=19.488$, p=012). The most affecting factor which total serum cholesterol factor was BMI(${\beta}=.151$, p=.000). Conclusion: The significant risk factors relating to serum total cholesterol were age, gender, BMI, smoking, and exercise. Therefore, for the reduction of serum total cholesterol level, it is recommended that nursing intervention for the prevention of obesity, change of life style should be implemented.

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제4기 국민건강.영양조사를 위한 순환표본 설계연구 (A Rolling Sampling Design for the Korea National Health and Nutrition Examination Survey)

  • 이계오;박진우
    • 한국조사연구학회지:조사연구
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    • 제8권2호
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    • pp.67-89
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    • 2007
  • [ $\ulcorner$ ]국민건강 영양조사$\lrcorner$는 건강면접 및 보건의식 형태조사, 영양조사, 검진조사로 구성되며 국민의 주관적 객관적 건강상태, 건강에 관한 의식 및 형태와 식품섭취현황 등 건강과 관련되는 제반 사항을 종합적이고 다각적으로 파악하는 것을 목적으로 실시된다. 이 조사는 1998년부터 3년 주기로 시행되고 있는데 현재 제3기 조사 통계가 공표되었으며, 2007년부터 2009년에 걸쳐 질병관리본부 주관으로 제4기 조사가 진행될 예정이다. 본 연구는 질병관리본부에서 결정한 대로 연중에 상시적으로 조사를 수행하고, 매년 국가단위 통계를 생산할 수 있도록 제4기 국민건강 영양조사를 위한 새로운 표본을 설계하는 것을 목적으로 한다. 본 연구의 가장 큰 특징은 국내 최초로 순환표본조사(rolling sampling survey)의 개념을 도입한 것이다. 조사여건을 고려할 때 일시에 훈련된 조사요원을 확보하는 것이 어려우므로 수준 높은 조사요원들이 상시적으로 조사를 수행할 수 있게 하도록 함으로써 조사의 품질을 담보할 수 있게 하는 순환조사 방식을 도일하는 것이 바람직하다. 이렇게 하면 측정자 간의 변동을 최소화시킬 수 있으며, 우리나라의 조사 여건을 충분히 감안한 효과적인 조사가 가능할 것으로 기대된다.

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