• Corrosion Science and Technology
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• 제3권1호
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• pp.1-5
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• 2004

A polarization resistance is generally used to estimate the corrosion rate in the corrosion monitoring by an electrochemical impedance method. When the Faradaic impedance has a time constant due to the reaction intermediate, the electrochemical impedance describes more than one loop on the complex plane. For example, the electrochemical impedance of iron in acidic solution shows capacitive and inductive loops on the complex plane. In this case, the charge transfer resistance and the polarization resistance are determined at middle and low frequency ranges, respectively. Which should be selected for corrosion resistance in corrosion monitoring, the charge transfer resistance or the polarization resistance'? In the present paper, the above-mentioned question is examined theoretically and experimentally.

• Asian Pacific Journal of Cancer Prevention
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• 제16권3호
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• pp.1303-1306
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• 2015

Studies of epidemiological and prognostic factors are very important for oncology practice. There is a rapidly increasing amount of research and resultant knowledge in the scientific literature. This means that health professionals have major challenges in accessing relevant information and they increasingly require best available evidence to make their clinical decisions. Meta-analyses of prognostic and other epidemiological factors are very practical statistical approaches to define clinically important parameters. However, they also feature many obstacles in terms of data collection, standardization of results from multiple centers, bias, and commentary for intepretation. In this paper, the obstacles of meta-analysis are briefly reviewed, and potential problems with this statistical method are discussed.

• 대한핵의학회:학술대회논문집
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• 대한핵의학회 1966년도 제5회 학술대회
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• pp.93.3-94
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• 1966

The fact that colloidal particulates of rdaiogold are mainly and effectively eliminated from the blood stream by phagocytic activity of Kupffer's cells of the liver has been successfully adopted to the diagnosis if certain liver diseases and the same principle has opened a new avenue to the study of the organ by obtaining scan. Indeed, the latter procedure has been widely used for the detection of space-occupying lesions of cirrhosis of the liver. Nevertheless problem of differential diagnosis of monochromatic "cold" areas or "mottling" of the internal structure on the scan limited the value of this diagnostic modality. The present investigation is aimed at improving intepretation of photoscan findings with the aid of blood clearance rate of the intravenously injected colloidal $^{198}Au$.

• 대한지구과학교육학회지
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• 제3권3호
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• pp.209-218
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• 2010

In this study, we investigate the effects of instruction using science magic program on the scientific attitude and scientific inquiry ability in elementary students. For this study, it was chosen two classes of the forth grades J elementary school in Seoul. Instruction using science magic program was applied to the experimental group for 8 weeks during the school hours. The results of this study were as follows : 1. Science tasks applied science magic had influence on elementary learners' scientific attitude in positive way. 2. Science tasks applied science magic had valuable significance to observation, classification, data intepretation ability. However it had no valuable significance to scientific integrated inquiry.

• 대한치과의사협회지
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• 제54권9호
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• pp.712-728
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• 2016

These days, the clinical course of dental imaging sector has done a lot of implant-related imaging courses, including cone beam CT. In contrast, the general image reading course is not given a lot of opportunities to learn. Therefore, it is imperative that we talk about the general image interpretation that can be read easily applied in a dental clinic. When we see a strange radiographic finding of our patient in the dental clinic, we should first check whether the radiographic finding is a normal finding or a morbidity. If the finding is diagnosed as a morbidity, you should make plans for the appropriate therapy. The most important step is classification between normal state and morbidity. Some lesions may occur without any clinical symptoms. Therefore, we should read all the parts of radiographs, even the patient does not have clinical symptoms.

• 한국광물학회지
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• 제12권2호
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• pp.66-76
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• 1999

Intergrowth texture of biotite and chlorite crystals within an amphibolitic schist of the northwestern Okchon metamorphic belt was investigated using back-scattered electron (BSE) imaging and high-resolution transmission electron microscopy (HRTEM). BSE images show that thin chlorite and biotite packets are mixed along (001) plane to result in intergrowth texture. In addition, rutile particles of submicron size occur exclusively at the boundaries between biotite and chlorite stacks. HRTEM investigation and remnant biotite layers are closely associated with such boundaries, suggestinga possibility that chlorite layers were formed from biotite during retrograde metamorphic reaction. Such intepretation of the origin of intergrowth texture can be further supported biotite is approximately 2 w%, and that of chlorite usually lower than 0.2 wt%. Ti was apparently leached out during the alteratin of biotite to precipitate rutile particles at the such rutile particles could be an important indicator showing that the intergrowth texture of chlorite and biotite is originated by a retrograde metamorphism rather than by incomplete chlorite-to-biotite reaction during prograde metamorphism. Biotite crystals contain intercalated chlorite layers will result in somewhat high Mg and Al, and the use of such inhomogeneous biotite will result in impreciese geothermobarometric calculations.

• 대한약침학회지
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• 제6권1호
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• pp.35-36
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• 2003

Background: Evidence based medicine has become main tools for medical practice. However, conducting a highly ranked in the evidence hierarchy pyramid is not easy or feasible at all times and places. There remains a room for descriptive clinical outcome measure studies with admitting the limit of the intepretation. Aims: Presents three Korean clinic based outcome measure studies with a view to encouraging Korean clinicians to conduct similar studies. Methods: Three studies are presented briefly here in치uding 1) Quality of Life of liver cancer patients after 8 Constitutional acupuncture; 2) Developing a Korean version of Measuring yourself Medical Outcome profile (MYMOP); and 3) Survey on 5 Shu points: a pilot In the first study, we have included 4 primary or secondary liver cancer patients collecting their diagnostic X-ray film and clinical data f개m their hospital, and asked them to fill in the European Organization Research and Treatment of Cancer, Quality of Life Questionnaire before the commencement of the treatment. The acupuncture treatment is set up format but not disclosed yet. The translation and developing a Korean version of outcome measures that is Korean clinician friendly has been sought for MYMOP is one of the most appropriate one. The permission was granted, the translation into Korean was done, then back translated into English only based on the Korean translation by the researcher who is bilingual in both languages. The back translation was compared by the original developer of MYMOP and confirmed usable. In order to test the existence of acupoints and meridians through popular forms of Korean acupuncture regimes, we aim at collecting opinions from 101 Korean clinicians that have used those forms. The questions asked include most effective symptoms, 5 Shu points, points those are least likely to use due to either adverse events or the lack of effectiveness, theoretical reasons for the above proposals, proposing outcome measures, and the time from insertion to be effective. The questionnaire is posted on the virtual notice board of the homepage of the communication KOMA (The official tool of Association of Korean Oriental Medicine).

• Spatial Information Research
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• 제6권2호
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• pp.201-216
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• 1998

건설교통부는 국가지리정보체계구축사업(NGIS)의 일환으로 수치지형도 제작사업을 1998년 말까지 완료할 예정이며, 특히 1:1,000 수치지형도는 지방자치단체의 GIS 기본도로 사용될 예정이다. 그러나 1:1,000 수치지형도에는 많은 지방정부들의 행정업무에 필요한 지적이나 도시계획과 같은 무형의 정보들은 포함되어 있지 않다. GIS사업의 활성화를 위해 지적도의 전산화 작업이 시급한 실정이다. 본 연구는 수치지형도와 지적의 불부합 원인을 분석하고, 정확도가 다른 두 데이타를 일치시키는 GIS의 기술적 방법들을 검토하고 서울시를 예로하여 도시계획관련부서의 지적데이타에 대한 수요를 분석하여 수치지형도와 중첩하여 활용할 수 있는 지적도 도형자료의 구축지침을 제시하였다. 그리고 제작지침 제시를 위해 서울시 중구 황학동, 신당동, 그리고 종로구 승인동 일부지역에 대한 편집지적 데이터를 구축하였다.

• 한국작물학회지
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• 제30권3호
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• pp.217-222
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• 1985

초형이 다른 3종의 수도 Isogenic line(Open-Spread- 및 Broom-type)을 5수준의 이앙밀도(47.62, 22.22, 15.15, 15.11 및 8.33주/$m^2$)와 4수준의 시비조건(증비, 보비, 감비 및 무비)에 공시하여 얻은 수량자료를 Multiple regression polynomial 수식으로 고정하고 편미분하여 밀도와 시비및 밀도$\times$시비의 작용력을 해석하였다. 그 결과는 다음과 갈다. 1. 소식조건하에서의 밀도변동에 따른 수량 반응은 Broom-type이 가장 높고 예민하였다(도 1). 2. 이앙밀도의 작용력〔$\delta$f(D, F)/$\delta$D〕은 Open-, 및 Spread-type이 다비에서 높아지는 대신에Broom-type은 시비와 관계없이 소식 및 밀식에서 높은 경향이었다.(도 2). 3. 시비율의 작용력 〔$\delta$f(D, F)/$\delta$D〕은 0~1000kg/10a 범위로서 Open- 및 Spread-type에서는 밀식조건하에서 높았으나 Broom-type에서는 소식조건하에서 소비 및 다비의 작용력이 큰 경향이었다(도 3). 4. Broom-type의 소식조건하에서 밀도$\times$시비의 상호작용력 〔$\delta$$^2$F(D, F)/$\delta$D$\delta$F〕은 음성을 나타내었고, Open- 및 Spread-type은 표준 및 밀식과 증비 조건에서 양성을 나타내었다(도 4). 5. $m^2$당 11~14주의 소식조건하에서 추정되는 소요시비수준은 Open-type 이 1.3~1.5배비인 반면에 Broom-type은 1.5배비 이상의 수준인 것으로 판단되었다. 6. 소식에 의한 이앙노동의 생력화를 위해서는 다비수용이 가능한 Broom-type의 연구가 필요할 것으로 해석이 된다.