• 대한화학회지
• /
• 제36권2호
• /
• pp.301-304
• /
• 1992

에탄올성 사카르보닐철산염, $HFe(CO)_4^-$과 아디파알데히드를 조합하면 아미노기를 과수소아제핀고리로 선택적으로 전환을 하는데 매우 효과적이다. 페닐렌디아민은 상압의 일산화탄소, 상온, 및 철산염 존재하에서 아디파알데히드와 반응하여 대응하는 과수소아제핀을 보통의 수득율로 주었다. 이 반응에 철산염아디파알데히드-페닐렌디아민계에서 몰비가 1.0 : 1.0 : 1.0일 때는 한 개의 과수소아제핀고리를, 1.0 : 2.0 : 1.0의 경우에는 두 개의 과수소아제핀고리를 선택적으로 주었다.

• Asian Journal of Innovation and Policy
• /
• 제6권3호
• /
• pp.245-261
• /
• 2017

As of the end of August 2017, there were 392 academic articles for $4^{th}$ Industrial Revolution in Korea. Is the vigorous discussion on the 4th Industrial Revolution in Korea normal? We checked the main theories on this topic by existing theories and responses of major countries and industries. The findings are that there are technologies called a Technological Revolution, and the industrial application of some technologies is in the starting stage. If comes, the Industrial Revolution is expected with the structure as follows: excellence science, core technologies, base technologies, application and infrastructure, and institutions. Nonetheless, the brisk studies are from three branches such as the Industry 4.0, social connection and artificial intelligence. The Industry 4.0, the digital transformation of manufacturing is the on-going issue in the industry, and artificial intelligence brings the biggest discourse. The 392 literature are mostly from introduction and preparation for future; technology 15.8%, industry 26.3%, society 24.5%, education 19.1%, policy 10.7%. The labor and employment is only 3.6%.

• 한국엔터테인먼트산업학회논문지
• /
• 제15권3호
• /
• pp.193-202
• /
• 2021

본 연구는 4차 산업혁명에 대한 보건계열 학생들의 인식과 교육 요구도를 조사하고, 보건의료 인력을 양성하기 위한 방향설정과 교육방안을 마련하고자 실시하였다. 이에 G도시에 소재한 H대학에 재학중인 보건계열 전공대학생 280명을 대상으로 성별, 학년에 따른 인식과 교육요구도를 비교 분석하였다. 여학생들은 4차 산업혁명에 대해 긍정적으로 인식하였으며, 학년이 낮을수록 전공영역에 미치는 영향에 대해 높은 인식을 나타내었다. 4차 산업혁명에 의한 영향에 대해서는 남학생의 경우 세대차이 심화(p<0.05), 빈부의 격차 심화(p<0.01), 개인정보침해 심화(p<0.05), 기존 일자리의 감소(p<0.05), 인공지능의 남용(p<0.05)과 같은 부정적인 요인에서 높은 것으로 나타났다. 보건계열 학생들은 4차 산업혁명에 대비해 바이오와 의료기기에 관한 교육(22.2%)을 가장 많이 희망하고 있었다. 4차 산업혁명의 영향에 대해 보건계열 학생들이 긍정적으로 인식할수록 교육 요구도가 높게 나타났다(p<0.001). 따라서 보건계열 학생들이 4차 산업혁명시대에 새로운 일자리의 창출과 삶의 질 향상과 같은 긍정적 요인이 향상될 수 있도록 프로그램 개발과 다양한 교육의 실시가 필요하다고 사료된다.

• 대한치과기공학회지
• /
• 제44권2호
• /
• pp.47-52
• /
• 2022

Purpose: This study aims to identify the recognition, readiness, and awareness of the need for education in the era of the 4th industrial revolution among dental technology students in the healthcare field, and to provide essential data for the development of a future-oriented curriculum. Methods: A survey of 260 students, who were briefed about the purpose of this study, was conducted at D University and G University, located in Daejeon and Gangwon-do, South Korea, respectively. A total of 229 questionnaires, excluding 31 with insufficient responses, were analyzed. Results: 1. Recognition of the 4th industrial revolution was 3.43±0.77, preparedness was 2.91±0.84, and awareness of the need for education was 3.86±0.80. 2. Major satisfaction was found to have a significant effect on concept recognition and impact recognition of the 4th industrial revolution, readiness level, and the need for education (p<0.001). Conclusion: It is necessary to develop an education program on specialized skills (professional knowledge) related to the 4th industrial revolution, and to implement such a program that serves the educational needs of individual groups.

• The Journal of Asian Finance, Economics and Business
• /
• 제8권1호
• /
• pp.157-167
• /
• 2021

Cyberloafing is activity deviation at the workplace where employees intentionally avoid doing their job during working hours that results in a decrease in productivity. Particularly in the context of this study, cyberloafing activity is the usage of the Internet while working. Yet, studies on the antecedents and consequences of cyberloafing in the context of industrial revolution 4.0 and society 5.0 have not been conducted. This research used a purposive convenient sampling of 280 employees in the business services branches in Indonesia, particularly the representative business service branches located in some cities and regencies, including Yogyakarta City, Sleman Regency, and Bantul Regency (Special Region of Yogyakarta) and its surroundings. The results show 3 antecedents of cyberloafing and 1 consequence of cyberloafing which influence each other. Furthermore, these findings have filled the existing gaps regarding the antecedents and consequences of cyberloafing in service provider industries in the context of industrial revolution 4.0 and society 5.0. From the results of this research, it can be concluded that the five hypotheses proposed in this study are supported. The antecedents and consequences of cyberloafing have been tested and proven in this study as a contribution to science and technology.

• 공업화학
• /
• 제30권4호
• /
• pp.466-471
• /
• 2019

1,4-다이옥산과 디클로로메탄은 국제암연구기관(International Agency for Research on Cancer)에서 발암가능그룹으로 분류하고 있으며, 산업폐수 방류수에서 고농도로 빈번하게 배출되고 있다. 산업폐수 방류수에 대한 물벼룩의 24 h 급성 독성평가에서 7.53 mg/L의 1,4-다이옥산농도에서 1.1 TU (toxic unit)로 배출허용기준(1.0 TU)에 근접한 값을 나타내었으며, 혼합폐수의 경우, 단일물질에 비해 상대적으로 높은 TU 값을 나타내었다. 실험실에서 제조된 합성폐수로부터 1,4-다이옥산 및 디클로로메탄의 24 h 반수영향농도($EC_{50}$)값은 각각 1,744 (0.06 TU), 170 mg/L (0.6 TU)로 TU 값이 매우 낮았으며, 1,4-다이옥산 100 ppm에 디클로로메탄 1, 5, 10 ppm을 첨가한 혼합물질의 독성평가결과, TU 값이 0.02, 0.04, 0.10으로 증가하여 두 물질 간 상승작용이 나타났다. 그러나 1,4-다이옥산 및 디클로로메탄에 대한 합성폐수의 TU 값은 비슷한 농도에서 산업폐수의 TU 값보다 5% 이하로 나타났다.

• 대한화학회지
• /
• 제34권6호
• /
• pp.641-645
• /
• 1990

에탄올성 사카르보닐 철산염, HFe(CO)$_4^-$와 수용성 숙신알데히드를 조합하면 아미노기를 피롤리딘 고리로 선택적 전환을 하는데 매우 효과적이다. 페닐렌디아민은 일산화탄소 압력, 실온, 철산염존재하에서 숙신알데히드와 반응해서 대응하는 피롤리딘을 보통의 수득률로 주었다. 이 반응에 철산염-숙신알데히드-페닐렌디아민계에서 몰비가 1.0:1.0:1.0일 때는 1개의 피롤리딘고리를, 1.0:2.0:1.0의 경우는 두개의 피롤리딘 고리를 선택적으로 주었다.

• 한국산업보건학회지
• /
• 제11권3호
• /
• pp.206-211
• /
• 2001

This article describes identification and quantification of benzene in the casting process. Air samples around the casting process were taken by using personal air sampler attached charcoal tube and desorbed by carbon disulfide. The identification and quantitative analysis of benzene have been performed by GC-MS and GC-FID. Calibration range of standard solutions for benzene was prepared in range from 0.1 to 2 times of TLVs concentrations($1.4{\sim}28{\mu}g/1m{\ell}$ CS2) and the limit of detection was $0.11{\pm}0.002{\mu}g/1m{\ell}$ CS2. Benzene detected in airborne was ranged in 4.0ppb~104.7ppb.

• 한국분말재료학회지
• /
• 제16권2호
• /
• pp.91-97
• /
• 2009

Nanopowders of $Co_3O_4$ and FeAl were fabricated by high energy ball milling. Dense 4.25 $Co_{0.53}Fe_{0.47}-Al_2O_3$ composite was simultaneously synthesized and consolidated by high frequency induction heated combustion method within 2 min from mechanically activated powders. Consolidation was accomplished under the combined effects of a induced current and mechanical pressure of 80 MPa.

• Journal of Microbiology and Biotechnology
• /
• 제18권12호
• /
• pp.1919-1926
• /
• 2008

Statistical experimental designs; involving (i) a fractional factorial design (FFD) and (ii) a central composite design (CCD) were applied to optimize the culture medium constituents for production of a unique antifreeze protein by the Antartic micro algae Chaetoceros neogracile. The results of the FFD suggested that NaCl, KCl, $MgCl_2$, and ${Na}_{2}{SiO}_{3}$ were significant variables that highly influenced the growth rate and biomass production. The optimum culture medium for the production of an antifreeze protein from C. neogracile was found to be Kalle's artificial seawater, pH of $7.0{\pm}0.5$, consisting of 28.566 g/l of NaCl, 3.887 g/l of $MgCl_2$, 1.787 g/l of $MgSO_4$, 1.308 g/l of $CaSO_4$, 0.832 g/l of ${K_2}{SO_4}$, 0.124 g/l of $CaCO_3$, 0.103 g/l of KBr, 0.0288 g/l of $SrSO_4$, and 0.0282 g/l of ${H_3}{BO_3}$. The antifreeze activity significantly increased after cells were treated with cold shock (at $-5^{\circ}C$) for 14 h. To the best of our knowledge, this is the first report demonstrating an antifreeze-like protein of C. neogracile.