• Title/Summary/Keyword: ${\chi}$상

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초대석-부길만 어린이도서연구외 이사장

  • Jo, Gap-Jun;Kim, Chi-Won
    • 프린팅코리아
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    • s.42
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    • pp.64-68
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    • 2005

  • 어린이 도서연구회는 어린이를 도서 선택의 주체로 인식하고 국내 어린이 교육문화 운동을 실천하기 위해 설립된 단체다. 이곳에서는 어린이 책을 연구하고 좋은 책을 골라 권장하는 등 어린이 삶을 바르게 가꾸기 위한 활발한 활동을 펼쳐오고 있다. 본지에서는 제16회 간행물윤리상 시상식에서 독서진흥상을 수상한 부길만 어린이도서연구회 이사장(한국출판문화학회장, 동원대학 교학처장)을 만나 대담을 나누는 자리를 마련했다.

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Phase identification and degree of orientation measurements far fine-grained rock forming minerals using micro-area X-ray diffractometer -$Al_{2}SiO_{5}$ Polymorphs- (미소부 X-선 회절분석기를 이용한 미립조암광물의 상동정 및 배향도 측정 -$Al_{2}SiO_{5}$ 3상다형-)

  • 박찬수;김형식
    • The Journal of the Petrological Society of Korea
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    • v.9 no.4
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    • pp.205-210
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    • 2000

  • Measurements of phase identification and degree of orientation for fine-grained (about 0.3 mm in diameter) minerals in rock samples performed by micro-area X-ray diffractometer.$Al_{2}SiO_{5}$ polymorphs (andalusite, kyanite and sillimanite) were chosen for the measurements and target minerals were existed on thin sections. Micro-area X-ray diffractometer is composed of 3(${\omega}\;{\chi}\;{\phi}$)-circle oscillating goniometer and position sensitive proportional counter (PSPC). $CuK_{\alpha}$ radiation was used as X-ray source and a pin hole ($50\;\mu\textrm{m}$$ in diameter) collimator was selected to focus radiation X-ray onto the target minerals. Phase identification and diffracted X-ray peak indexing were carried out by 3(${\omega}\;{\chi}\;{\phi}$)-circle oscillation measurement. Then, 2(${\omega}\;{\phi}$)-circle oscillation measurement was made for the purpose of searching the prevailing lattice plane of the minerals on thin section surface. Finally, for a selected peak by 2-circle oscillation measurement, X-ray pole figure measurement was executed for the purpose of check the degree of orientation of the single lattice direction and examine its pole distribution. As a result of 3-circle oscillation measurement, it was possible that phase identification among $Al_{2}SiO_{5}$ polymorphs. And from the results of 2-circle oscillation measurement and X-ray pole figure measurement, we recognized that poles of andalusite (122), kyanite (200) and sillimanite (310) lattice plances were well developed with direction normal to each mineral surface plane respectively. Therfore, the measurements used with micro-area X-ray diffractometer in this study will be a useful tool of phase identification and degree of orientation measurement for fine-grained rock forming minerals.

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Quantitative analysis of increase in depth of focus using Wigner distribution function (Wigner 분포 함수를 초점 심도 증가의 정량적 해석)

  • 장남영;강호정;은재정;최평석
    • Korean Journal of Optics and Photonics
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    • v.11 no.6
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    • pp.385-389
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    • 2000

  • A phase-retardation function which was derived from Wigner distribution function (WDF) is used to increase a focal depth of a radially symmetric optical system. The WDF for one-dimensional signal is represented as a two-dimensional function of phasespace ($\chi,\zeta$), and a normalized irradiance is described as a form of the Strehl ratio (SR). The increase in the focal depth is accomplished by delivering a shearing tilt a that represents a characteristic of free space propagation with simple manipulation in the WDF space. In this paper we propose a method for evaluating the focal depth quantitatively by representing the phaseretardation function in terms of the focal depth term. In order to verify the validity of the proposed method, we compared the numerically analyzed result with that of J. Sochki's study. study.

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Epidemiological Change on Paragonimiasis in Ung Chi Myun, Bo Sung Gun (보성군(寶城郡) 태치면(態峙面)에 있어서의 폐흡충증(肺吸虫症)의 역학적(疫學的) 추이(推移))

  • Lee, Joo-Sang;Bae, Pyung-Weon;Rim, Han-Jong;Shin, Hong-Shik
    • Journal of agricultural medicine and community health
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    • v.5 no.1
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    • pp.40-45
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    • 1980

  • Paragonomiasis is a common trematodiasis of medical importance and one of public health. problems in many araes af southern part of Korea. Authars carried out the survey for human paragonimiasis in Ung Chi Myun, Bo Sung Gun during 1968 to 1979 by the use of intradermal screening test with veronal buffered saline antigens. In 1968 and 1978, inhabitants of all age groups in Ung Chi Myun were examined. In 1979, 1, 119 consisting of primary school children and middle school students in Ung Chi Myun and 521 high school students in Beol Gyo Eup were examined. The following results were obtained in this survey. 1) In 1968, 136 inhabitants were showed 61.0% positive reaction (66.3% in male, 53.6% in female). The positive rates were similar in each age groups. 2) In 1978, 207 Inhabitants were showed 32.9% positive reaction (36.3% in male, 29.4% in female). The positive rate was shown as high as 30% in the age groups of over 10 years old. 3) In 1979, primary school children and middle school students in Ung Chi Myun were showed 15.8% positive reaction and high school students in Beol Gyo Eup were showed 6.9% positive reaction.

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