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Synthesis of Intermetallics and Nanocomposites by High-Energy Milling
Bernd F. Kieback,H. Kubsch,Alexander Bohm,M. Zumdick,Thomas Weissgaerber The Korean Powder Metallurgy Institute 2002 한국분말재료학회지 (KPMI) Vol.9 No.6
Elemental powders are used in high energy milling processes for the synthesis of new compounds. The low temperature solid state reactions during milling in inert gas atmosphere may result in intermetallic phases, carbides, nitrides or silicides with a nanocrystalline structure. To obtain dense materials from the powders a pressure assisted densification is necessary. On the other side the defect-rich microstructure can be used for activated sintering of elemental powder mixtures to obtain dense bodies by pressureless sintering. Results are discussed for nanocrystalline cermet systems and for the sintering of aluminides and silicides.
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신계영,Myunghee Jun,김혜경,Michael Wreen,Sylvia Mimi Kubsch 한국보건의료인국가시험원 2020 보건의료교육평가 Vol.17 No.-
Purpose: This study aims at determining the competencies of Korean nurses in prenatal genetic nursing. Methods: First, a 3-round Delphi survey was conducted to establish prenatal genetic nursing competencies. Second, a prenatal geneticnursing education program (PGNEP), incorporating the findings from the Delphi survey, was designed. Third, a single group pre- andpost-quasi-experimental study at a PGNEP workshop was conducted to assess the effectiveness of the integration of the competenciesinto the PGNEP with the measurements of knowledge about prenatal genetic testing and nursing (K-PGTN) and information needsabout prenatal genetic testing and nursing (I-PGTN). Finally, the identified competencies were reexamined for their clarity. Results: Based on the Delphi survey 78 competency components were identified. The components were then classified under 10 categories, which were organized under 4 domains. The domain of “experiential genetic nursing knowledge” and the domain of “ethics andlaw” were ranked as the first and the second in significance. The quasi-experimental study showed that the mean scores in K-PGTNwere significantly increased from 8.19±2.67 to 11.25±2.51 (P<0.001). The mean scores of “ethics and law” in I-PGTN decreased significantly (P=0.023). The headings of 4 categories and 2 domains were revised. Conclusion: This study identified competencies for prenatal genetic nursing and nursing education in Korea. There is a need for nursing instructors and researchers to improve the competencies of nurses in the identified areas. Particular emphasis should be placed onexperiential nursing knowledge and on ethics and law related to prenatal genetic nursing.
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