• Title/Summary/Keyword: 금속 조직

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고대 금동 도금기법에 관한 연구-황남대총 고분 출토유물을 중심으로

  • Im, Seon-Gi;Jeong, Yeong-Dong;Park, Dong-Gyu;Gang, Seong-Gun
    • 보존과학연구
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    • s.12
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    • pp.42-62
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    • 1991
  • A.D. 5세기 전반기경으로 추정되는 황남대총 고분에서 발굴출토된 유물 중 도금 기법이 적용된 대표적인 형태 및 용도의 유물 시료 13점을 선정 SEM-EDS 및 금속현미경에 의해 분석한 결과,시료의 도금피복 기술은 수은(Hg)에 의한 아말감(amalgam) 도금법에 의한 것으로 판명되었으며, 도금피막의 두께는 $5.99∼12.97\mum$ (단, 소지가 은인 시료 No.C는 $19.96\mum$)로 균일하고 치밀하게 도포되었다. 소지금속은 금속현미경 조직검사 결과 대부분 단조로 제조된 4.7∼11.5%의 연(Pb)을 함유하고 약 1.7% 내외의 아연(Zn)을 함유한 동합금이었다. 또한 내재된 불순물이나 기공이 매우 적은 것으로 보아 당시의 소지금속인 동합금 주조기술이 상당한 수준임을 알 수 있었다.

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Examination of Organizational Communication and Culture as a Moderator of the Relationship between Job Satisfaction and Organizational Performance (직무 만족과 조직 성과의 관계 탐색 : 조직 커뮤니케이션과 조직 문화의 조절 효과)

  • Lee, Gunhyuk
    • The Journal of the Korea Contents Association
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    • v.13 no.4
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    • pp.376-388
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    • 2013
  • This study investigated the role of organizational communication, culture and trust as a moderator of the organizational performance(the growth of production and quality improvement) and job satisfaction. Using data collected from 248 workers at 128 establishments in Changwon industrial complex, morderated regression analyses explored the proposed model. As a result, communication activity and organizational trust was found negatively to moderate the relationship between job satisfaction and quality improvement/the growth of production. And organizational culture was found positively to moderate the relationship between satisfaction and quality improvement. Implications of these findings were discussed.

Compression Plate Fixation with Autogenous Bone Graft for Humerus Shaft Nonunion (상완골 간부 불유합에 대한 금속판 고정 및 자가골 이식술)

  • Cho, Chul-Hyun;Song, Kwang-Soon;Bae, Ki-Cheor;Kim, In-Kyoo;Kwon, Doo-Hyun
    • Clinics in Shoulder and Elbow
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    • v.12 no.1
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    • pp.33-37
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    • 2009
  • Purpose: To evaluate the results of the compression plate fixation and autogenous bone graft in the management of humerus shaft nonunion. Materials and Methods: Eighteen cases were treated for humerus shaft nonunion using compression plate fixation and an autogenous iliac bone graft. The mean follow-up period was 28 months. Bony union was confirmed from the serial radiographs and the clinical outcomes were assessed according to ASES scoring system. Results: In 12 cases of initial plate fixation, the causes of nonunion were 6 cases of inadequate plate length, 2 with a broken plate, 2 with screw loosening, 1 infection and 1 noncompliance of a psychiatric patient. In 3 cases of initial intramedullary fixation, the cause of nonunion was a distraction of the fracture site. In 3 cases of external fixation, the cause of nonunion was inadequate fixation. All cases showed bony union after an average of 24 weeks. The clinical outcomes were 11 excellent, 6 good and 1 fair. Conclusion: In the treatment for nonunion, compression plate fixation with autogeneous bone graft after complete removal of the fibrous and necrotic tissue is believed to give satisfactory results.