• Title/Summary/Keyword: tweed

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Annealing Experiments of Albite Using Optical Microscope Heating Stage (광학현미경 가열실험대를 이용한 알바이트의 등온가열 실험 연구)

  • Park Byung-Kyu;Kim Yong-Jun;Kim Youn-Joong
    • Journal of the Mineralogical Society of Korea
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    • v.18 no.4 s.46
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    • pp.289-299
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    • 2005

  • Annealing experiments on albite powders, thin sections, and TEM specimens have been performed utilizing an optical microscope heating stage. Sample orientations were determined by optical microscope and XRD, and then confirmed by TEM diffraction patterns. Partial melting of samples occurred at $1030^{\circ}C$-l2 hr for powder, but at $1060^{\circ}C$-12 hr for TEM specimen. It is difficult to get TEM images of albite microstructures above this temperature due to thickening and the amorphous phase of the melted part. Correlative studies between optical microscopy and TEM indicated that the $1050^{\circ}C$-12 hr annealing in ambient condition was most adequate to observe tweed microstructures in albite through TEM. In situ TEM heating experiments for direct observation of tweed microstructures in albite may require annealing at slightly higher temperatures than $1050^{\circ}C$ considering the high vacuum condition inside TEM.

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A STUDY OF THE STANDARDS ACCORDING TO THE STEINER AND TWEED ANALYSIS IN KOREAN NORMAL OCCLUSION (정상교합자에 있어서 Steiner씨 및 Tweed씨 분석법에 의한 교정학적 표준치에 관한 연구)

  • Lee, Gwa Hee;Ryu, Young Kyu
    • The korean journal of orthodontics
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    • v.13 no.1
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    • pp.83-94
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    • 1983

  • For the better orthodontic diagnosis, case analysis, and treatment plan, the author studied the cephalometric analysis of 365 Korean with normal occlusion occording to the Steiner and Tweed analysis. The subjects consisted of 162 males and 203 females from 7 to 19 years with normal occlusion and were divided into three groups according to the Hellman's dental age. The results were obtained as follows: 1. The Ideal Acceptable Compromises were determined after measurement of male and female average by the Steiner analysis in Hellman's dental age III B, IV A, IV C group. 2. The Holdaway ration were 6.5:1.0 in Group I, 6.5:1.5 in Group II, 6.5:1.5 in Group III. 3. The Tweed's triangle were $FMA\;27^{\circ}\;FMIA\;58^{\circ}\;IMPA\;95^{\circ}$ in Group I and II, $FMA\;27^{\circ}\;FMIA\;62^{\circ}\;IMPA\;95^{\circ}$ in Group III.

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A Study on the Chanel Suit (샤넬 슈트의 디자인 특성에 관한 연구)

  • 이미숙
    • Journal of the Korean Society of Costume
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    • v.48
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    • pp.197-216
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    • 1999

  • This study reflects the aim of analyzing the formality and symbolism of the Chanel suit. Chanel had designed jersey and tweed cardigan suits in the 1910s and 1920s while her suits of the 1930s were crisply fitted. The suits of the 1950s and 960s while were comfortable and slightly boxy marked a significant step forword. Lagerfeld's mission at Chanel was to tranmute the basic elements of the Chanel style and make them contemporary. He has also introduced the contemporay wide shoulders and short tihht skirt In place of sensible knee-length skirts he offered hemlines that either grazed the ankles or exposed most of the thighs. Besides her very influential jersey and tweed cardigan suit Chanel continued to assert her considerable strength with materials often making her suits in very delicate feminizing fabrics. in place of the classic boxy tweed jacket Lagerfeld introduced jackets made of terrycloth denim and stretch fabric Many of Chanel's suits show a stylish sense of colour that would have made artist envious. Chanel and Lagerfeld chose variety of colours from beige and grey and black to blue green cerisen and red for her suits. They was completely in tune with the twentieth century understanding the changes in lifestyles of woman and also understanding how her clothes should cater to them Thus the Chanel suit is more a way of life than just a fashion and is synonymous with wealth and aritocracy. It is one of the most popular status-symbol styles of the 20th century.

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Electron Microscopy Analysis of Pd-Cu-Ga System Dental Alloy (치과용 Pd-Cu-GarP 합금의 전자현미경 분석)

  • 김기주;김수철;이진형
    • Journal of Biomedical Engineering Research
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    • v.20 no.6
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    • pp.539-546
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    • 1999

  • 현재 상용화되고 있는 치과용 76.5% Pd-11.2% Cu-7.2% GarP 합금의 왁스모형을 원심주조기로 주조하여, 임상조건의 탈개스 및 세라믹 소성처리를 하였다. 이에따른 각각의 시편에 대해 미세조직의 변화를 주사전자현미경 및 EDS로 관찰하고, 최종적인 투과전자현미경으로 조사하였다. 각 조건의 편석, 결정립계 및 석출물부위를 주사전자현미경과 EDS 고 관찰한 결과, 이원계 Pd-GA합금의 안정상들에 해당하는 정량적인 조성비는, 단지 상대적으로 Ga의 성분비만 높게 감지되었다. 특히, 세라믹소성 처리후 미세조직에서 형성된 석출물에 근접한 기지조직일수록 Ga의 농도가 상대적으로 줄어든 고갈현상을 확인하엿다. 또한 투과전자현미경의 제한시야회절도형 분석결과, 주조 및 탈개스처리 후 미세조직의 편석부위에서는 GA의 가장 큰 강도를 보였고, 또 Ga과 Pd 고용체 사이에 미세한 판상의 석출물에 기인하는 줄무늬를 관찰하였다. 한편, 세라믹소성처리후 미세조직의 석출물은 금속간화합물 Pd2Ga으로 밝혀졌으며, 기지조직은 <100> 방향을 따라 약 25nm의 폭을 가지는 미세한 섬유상 형태의 소위 "tweed 조직'을 형성하였다.성하였다.

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