• Proceedings of the Korean Institute of Industrial Safety Conference
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• 2001.11a
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• pp.67-72
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• 2001

오랜 동안의 경험으로부터 조건설정이 표준화되어 있는 석유화학공업과는 달리 정밀화학공업에 있어서는 대상이 되는 공정의 반응조건 등을 제조자 스스로 결정해야 하는 경우가 많다. 또한, 취급하는 화학물질의 열분해 또는 반응위험성에 대한 위험성평가는 물론 물질안전자료(MSDS)도 확보되지 않은 상태에서 취급되는 경우가 많아 폭발ㆍ화재로 인한 중대재해의 잠재적 위험성이 매우 높은 상태이다.(중략)

• Journal of the KSME
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• v.28 no.1
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• pp.37-41
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• 1988

일반적으로 화학공장에서 요구되는 프로세스 펌프는 취급하는 액의 물리적 화학적 성질 및 고 형체(solid)함량, 결정생성 여부 등을 고려 이에 충분히 견디고 유지보수가 용이하며 가격 면에 서도 저렴하고 여러 가지 운전 조건에 상응할 수 있는 호환성 있는 제품이어야 한다. 다양한 액성 및 운전조건에 적합한 펌프 선정에는 실제적인 많은 시험과 경험이 필요하다. 본 글에서는 원심펌프 선정시 보편적으로 고려되어야 할 일반사항에 대하여 기술하고자 한다.

• Journal of Korea Technology Innovation Society
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• v.22 no.2
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• pp.159-185
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• 2019

Chemical industry, as one of the basis industries of the country, is characterized by converged high-end technology and large scale capital investment. In 2018, the government announced "The Strategy for Chemical Industry Development" with the vision of 'An Upgrade to the Advanced Chemical Industry'. In the meantime, the advanced chemical industry in Korea has been developed not by its own R&D, but by the upgrading of technologies and processes through the technology transfer from developed countries. The method of technology transfer was mainly achieved with international joint ventures (hereafter IJV) linked with technology transferors from developed countries. As it is necessary to grasp the determinants of the technology transfer and their importance to promote the transfers through IJVs, this relative importance analysis study was conducted by using the method of quantifying experts' opinions (AHP) on the determinants of the technology transfer of both parties. As a result of the analysis, in the Hierarchy1(PEST factors), the technology transferees focus on economic factors such as 'profitability of technology transfer' and 'cost efficiency', while technology transferors considered technical factors such as 'operational excellence (abilities to continuously improve technology process)'. In addition, transferors and transferees have different priorities for technology transfer determinants in all areas of Hierarchy 2 (sub-determinants). This suggests that Korean government or enterprise should shift the policy direction toward 'technology-oriented' when they promote advanced-technology transfer through IJVs.

• Electrical & Electronic Materials
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• v.3 no.4
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• pp.263-270
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• 1990

WSi$_{x}$박막을 Polycide구조로 저압화학증착법에 의해 제작한 후, 열처리를 N$_{2}$분위기에서 30분간 여러온도로 수행하였다. WSi$_{x}$박막의 전기비저항은 열처리온도의 증가에 따라 감소하였으며 1000.deg.C이상으로 열처리한 시편의 경우, 하부 다결정실리콘층의 도우핑여부에 관계없이 35.mu.m.OMEGA.-cm 정도를 나타내었다. 560.deg.C의 열처리에서 WSi$_{x}$박막은 정방정의 WSi$_{2}$ 결정질로 결정화가 되기 시작하였고 열처리온도의 증가에 따라 WSi$_{2}$결정립의 성장도 관찰되었다. 열처리온도에 따른 전기저항의 변화는 WSi$_{x}$박막의 결정립크기와 밀접한 관계가 있었다. 증착된 WSi$_{x}$박막내의 광잉실리콘원자들이 열처리중에 하부의 다결정실리콘층으로 재분배됨을 AES분석에 의해 확인하였다. Hall 측정결과 900.deg.C이상으로 열처리된 시편은 Hole도전체의 거동을 나타내었고 800.deg.C이하로 열처리된 시편은 electron도전체의 거동을 나타내었다.

• Journal of the Korean Chemical Society
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• v.51 no.6
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• pp.595-599
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• 2007

• 한국전자현미경학회:학술대회논문집
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• 2005.11a
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• pp.103-105
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• 2005

• International Area Studies Review
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• v.14 no.1
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• pp.141-160
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• 2010

The paper examines the determinants factor and business performance of global supply chain management. Partnership and process innovation were used as proxy for the characteristics of determinants factor of global supply chain management. Agility of business performance was used as proxy for the business performance of global supply chain management. Based on the analysis of sixty eight global supply chain management cases in Oil and Chemical Industry, the following results were found. Firstly, it was found that the process partnership of determinants factor affects agility of improved business performance. Secondly, process innovation of determinants factor was not improved more agility of improved business performance. However, there were several limitations such as characteristics of process innovation and partnership, etc.

• Economic and Environmental Geology
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• v.34 no.5
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• pp.437-446
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• 2001

Zoned epidotes formed by the propylitic alteration of the Bobae sericite deposit in western Pusan show complex compositional zoning patterns, such as multiple growth zoning, oscillatory zoning, patchy zoning and irregular zoning. The complex zoned epidote, in general, shows AI-rich cores and Fe-rich rims. Pistacite component (Ps) in the epidote ranges from 18.5 to 74.3 mot.%. Remnant textures in multiple growth zoning indicate that the earlier zone was partially resorbed prior to growth of later one. Multiple growth zoning and oscillatory zoning suggest that hydrothermal system underwent rapid changes and fluctuations in fluid chemistry, redox condition, or temperature.

• Journal of the Korean Chemical Society
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• v.31 no.6
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• pp.582-589
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• 1987

The thermal properties of poly (ethylene terephthalate) (PET) modified by 5-sulfoisophthalic acid sodium salt(SIAS) were studied. The glass transition temperature was increased, and the melting temperature and the crystallization rate were decreased as the content of SIAS unit was increased. The decrease of crystallization rate is thought to be due to the polar, bulky sulfonic acid sodium salt group which greatly retards the crystallization on to the growing crystal surface of the diffused polymer chain. The crystallization mechanism of copolyester is dependent on the content of SIAS unit and the three dimensional growth of crystal is hindered by the added SIAS unit.

• Journal of the Korean Chemical Society
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• v.66 no.6
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• pp.451-458
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• 2022

Through the crystal alignment research based on the magnetic properties of LiNi_xMn_yCo_1-(x+y)O₂ such as magnetic susceptibility and related anisotropy, a crystal aligned LiNi_0.6Mn_0.2Co_0.2O₂ electrode is obtained, in which the (00l) plane is frequently oriented perpendicular to the surface of a current collector. The crystal aligned LiNi_0.6Mn_0.2Co_0.2O₂ electrode steadily exhibits low electrode polarization properties during the charge/discharge process in a lithium-ion battery, thus affording an improved capacity compared to a pristine LiNi_0.6Mn_0.2Co_0.2O₂ electrode. The aligned LiNi_0.6Mn_0.2Co_0.2O₂ electrode may have an appropriate structural nature for fast lithium-ion transport due to the oriented (00l) plane, and thus it contributes to enhancing the battery performance. This enhancement is analyzed in terms of various electrochemical theories and experiment results; thus, it is verified to occur because of the considerably fast lithium-ion transport in the aligned LiNi_0.6Mn_0.2Co_0.2O₂ electrode.