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여성창업 지원사업 평가지표 개발을 위한 전문가 대상 델파이 분석
김흥희,김윤환,김문숙,주영미,김대건 국제문화기술진흥원 2024 The Journal of the Convergence on Culture Technolo Vol.10 No.1
This paper is a study on the “Development of Assessment Index for Women’s Entrepreneurship support programs.” This research highlights the absence of specific assessment indicators for selecting women-led enterprises in women's entrepreneurship support programs, thereby illuminating the limitations of current evaluation methods. It emphasizes the necessity for effective indicators to more successfully select women entrepreneurs and enterprises. The study derives numerous success factors for women's entrepreneurial ventures from prior research and develops a more likely to succeed assessment index for women-led enterprises using the Delphi methodology and collaboration with expert panels. The result is a new assessment index reflecting the characteristics of women entrepreneurs, expected to overcome the limitations of existing selection methods and contribute to enhancing social support and policy development for women-led enterprises.
저온균일침전법으로 제조된 루틸상 TiO<sub>2</sub>분말의 분산 안정성
배현숙,박순동,김흥희,이창규,김선재 한국세라믹학회 2002 한국세라믹학회지 Vol.39 No.1
Dispersion stability of nano-sized rutile TiO$_2$powder with acicular typed primary particle produced by homogeneous precipitation process at low temperatures was studied in aqueous and non-aqueous media in the presence of various electrolytes. The zeta potential measurements have shown that the addition of electrolytes to aqueous and non-aqueous dispersion media leads to charge reversal on TiO$_2$particle surface. The electrostatic repulsive forces acting on between TiO$_2$particles dispersed in non-aqueous media were found to be significantly greater than that in aqueous media, which relate closely to the physical properties of the organic solvents, such as viscosities and dielectric constants. The pH values, the concentration of electrolytes and the valence of the ions have changed greatly the surface potential of TiO$_2$ particles and have governed the dispersion behavior of TiO$_2$particles virtually. 여러 종류의 전해질이 존재할 때, 수계 및 비수계 분산매체에서 저온균일침전법으로 제조된 침상형태의 일차입자를 갖는 나노 크기의 루틸상 TiO$_2$분말에 대한 분산 안정성을 조사하였다. 제타전위 측정은 수계 및 비수계 분산매체에 전해질 첨가가 TiO$_2$입자 표면의 전위 역전을 유발하는 것을 보여주었다. 비수계 분산매체에 분산되어 있는 TiO$_2$입자 사이에 작용하는 정전기적 반발력은 수계 분산매체에서보다 크게 관찰되었고, 이것은 점도, 유전 상수와 같은 유기 용매의 물리적 특성과 밀접한 연관이 있음을 알 수 있었다. pH, 전해질의 농도와 이온의 원자가는 TiO$_2$입자의 표면전위를 크게 변화시켰고, TiO$_2$입자의 분산 거동을 사실상 주도하였다.
Sodium Flame Encapsulation 방법에 의한 초미립 Ti 분말 합성 및 공정개발
맹덕영,이창규,김흥희,Maeng, Deok-Yeong,Lee, Chang-Gyu,Kim, Heung-Hui 한국재료학회 2002 한국재료학회지 Vol.12 No.5
Synthesis and process development of nano-size Ti powder by SFE(Sodium/halide Flame Encapsulation) method were investigated. Four concentric coflow burner was used and its flame configuration was $TiCl_4/Ar/Na/Ar$ in order from the center. Flame has been controlled by the various processing parameters such as temperature of burner and flow rates of both $TiCl_4$(g) precursor and Na(g). It was found that yellow-colored flame was shown in the flow rates of 70cc/min of $TiCl_4$(g) precursor and 2 $\ell$ /min of Na(g) which were regarded as optimum flame condition. The powders encapsuled by NaCl were produced having the average powder size of 250nm. The results of X-ray diffraction showed that powders from the optimized condition consisted of pure Ti and NaCl. TEM analysis confirmed that the several Ti powders of 20-100nm were encapsulated with NaCl. After removing sodium chloride by heat treatment, the spherical Ti powders with the size range of 80 to 150nm were obtained.
전기폭발법에 의한 Ni 및 Ni-Cu 나노 금속 분말의 제조와 자기적 특성연구
박중학,엄영랑,김경호,김흥희,이창규 한국분말야금학회 2003 한국분말재료학회지 (KPMI) Vol.10 No.2
Nanocrystalline materials of Ni and Ni-Cu alloy have been synthesized by the pulsed wire evaporation (PWE) method and these abnormal magnetic properties in the magnetic ordered state have been characterized using both VSM and SQUID in the range of high and low magnetic fields. Ni and Ni-Cu particles with an average size of 20 to 80 nm were found to influence magnetic hysterisis behavior and the results of powder neutron diffraction patterns and saturation magnetization curves are shown to indicate the absence of the NiO phase. The shifted hysterisis loop and irreversibility of the magnetization curve in the high field region were observed in the magnetic-ordered state of both Ni and Ni-Cu. The virgin magnetization curve for Ni slightly spillover on the limited hysterisis loop ($\pm$20kOe). This irreversibility in the high field of 50 kOe can be explained by non-col-linear behavior and the existence of the metastable states of the magnetization at the surface layer (or core) of the particle in the applied magnetic field. Immiscible alloy of Cu-Ni was also found to show irreversibility having two different magnetic phases.