• Journal of the Semiconductor & Display Technology
• /
• v.16 no.1
• /
• pp.45-51
• /
• 2017

Poly(urethane acrylate) siloxane oligomers with Interpenetrating polymer netwoked nanoparticles were prepared to synthesize hard coating solution by reaction with diisocyanates. The diisocyanate combined siloxane hard coating solution showed more flexibility than the siloxane solution. In addition, diisocyanate resulted in improvement of curl property and surface hardness in the siloxane solution. Of the used diisocyanates, isophorone diisocyanate and acryloyloxy ethyl diisocyanate were good for UV hard coating solution. This effect will decrease brittleness in the siloxane solution using for plastic display plate.

• Annual Conference of KIPS
• /
• 2020.05a
• /
• pp.334-337
• /
• 2020

코로나감염-19, 사스, 메르스 등 바이러스성 질병이 전세계적으로 확산되어 많은 인구가 감염되어 왔다. 바이러스성 질병의 확산 예측 및 종결을 위해 실제 감염자 데이터를 기반으로 한 시뮬레이션 연구는 반드시 필요하다. 본 연구는 지역 내 클러스터 감염 시뮬레이션을 위한 바이러스 감염모델을 제안한다. 제안하는 모델은 여러 개의 셀로 구성되어 있으며, 각 셀은 군집을 표현하고 있다. 본 논문에서 제안한 모델은 실제 데이터를 기반으로 하여 정확도가 높으며, 이를 바탕으로 향후 지역의 특성을 반영한 전파 시뮬레이션 혹은 지역 간의 전파를 예상하는 시뮬레이션의 기초로 사용될 수 있다.

• Journal of Engineering Education Research
• /
• v.1 no.1
• /
• pp.80-85
• /
• 1998

Yak-yong Jung discussed technology for the first time in Korea, 195 years ago, in his [Ki-ye-lon](the Theory of Techne: 1802) in which he investigated the essence and the developmental aspect of technology and the ways to promote technology. As a man of the 19th century when the West was being transformed into an industrial society by the Industrial Revolution, Jung suggested various ways to reform his nation an agricultural society. Although they were not accepted by the Dynasty, consideration of the social and economic situation and the world history at that time shows that they were very innovative. This study aims at defining Jung's view of technology, centering around [Ki-ye-lon](the Theory of Techne), and discusses what the technological education should emphasize in the future, that is to say: mathematical and scientific principles, the utility of technology, its developmental aspect, technological policy.

• Journal of the Semiconductor & Display Technology
• /
• v.15 no.2
• /
• pp.38-42
• /
• 2016

We investigate the solution coating process of organic small molecules that are easily recrystallized in a solvent. The spin-coated films of small molecule N,N'-diphenly-N,N'-bis(1,1'-biphenyl)-4,4'-diamine (NPB) exhibit many aggregations on the surface and thus poor surface morphology. To tackle it, we have added a chain-entangled polymer poly(N-vinylcarbazole) (PVK) into the NPB solution. It is found that a small amount of PVK indeed prohibits the recrystallization of NPB in a solvent. By the addition of PVK (30 wt%), the peak-to-peak roughness of the films is reduced from 262 nm down to 2.7 nm, which is even lower than that (~5.1 nm) of the polymer film. It is also demonstrated that OLED with the PVK-mixed NPB film shows higher current and power efficiencies, compared to OLED with the NPB or PVK film. It is attributed that the addition of PVK into NPB suppresses the occurrence of leaky channels induced by the recrystallization phenomenon.

• The Mathematical Education
• /
• v.57 no.1
• /
• pp.1-36
• /
• 2018

The purpose of this study is to examine the relationship between utilization of technology and TPACK in mathematics teachers, and to analyze needs and retentions, difference between needs and retentions, and educational needs of TPACK in mathematics teachers. Furthermore, we will prioritize TPACK items that mathematics teachers want to change, and provide implications for teacher education related to TPACK in the future. To do this, we analyzed 328 mathematics teachers nationwide by using survey on the utilization of technology, averages of TPACK's needs and retentions, t-test of two averages, Borich's educational needs analysis, and the Locus for Focus model. The results are as follows. Firstly, the actual utilization rate was lower than the positive recognition of utilization of technology by mathematics teachers, and many mathematics teachers mentioned the lack of knowledge related to TPACK. Secondly, the characteristics of in-service mathematics teacher's needs and retentions for TPACK were clear, and TPACK's starting line of in-service mathematics teacher can be different from pre-mathematics teacher's. The retentions was high in the order of CK, PCK and PK, and the needs was higher in the order of TPACK, TCK, TK and TPK. All of the higher retentions were knowledge related to PCK, and the value of CK was extremely high among them. In addition, mathematics teachers recognized needs for integrated knowledge related to technology, and they needed more TCK than TPK. The difference between needs and retentions showed that all items except two items in the PK were significant. Retentions of all items in CK was higher than needs, needs of all items in TK, TCK, TPK and TPACK was higher than retentions, PK and PCK were mixed. Thirdly, based on the analysis of Borich's educational needs and the Locus for Focus model, teacher education on TPACK for mathematics teachers needs to focus on TPACK, TK, TCK, and TPK. Specifically, TPACK needs to combine technology in terms of creativity-convergence, mathematical connections, communication, improvement of evaluation quality, and TK needs to new technology acquisition, function of utilizing technology, troubleshoot problems with technology, TCK needs to mathematical value(esthetic, practical) with technology, and TPK needs to consider technology in terms of evaluation methods, teaching and learning methods, improvement of pedagogy. Therefore, when determining the direction of teacher education related to TPACK in the future, if they try to reflect these items in detail, the teachers could participate more actively and receive practical help.

• International Journal of Advanced Culture Technology
• /
• v.10 no.2
• /
• pp.135-139
• /
• 2022

The purpose of this study is to explore the application structure of customized "lifelong education: (versus) higher education" for individuals with developmental disabilities in two types.As for the research method, expert consultation was composed secondary with literature analysis as the primary procedure.The contents of the study were presented by classifying the application structure of customized lifelong education versus higher education for individuals with developmental disabilities into two types. Accordingly, the first research content is a school type-centered structure, which can be understood as a type that focuses on higher education while linking aspects of lifelong education. And the second research content is a structure centered on the type of independent life of individuals with developmental disabilities, which can be understood as a type that focuses on lifelong education while linking with the aspects of higher education. As a result of the study, the aspect that the research contents considered above can be gradually realized through the currently established infrastructure at Daegu University in the current situation in Korea has been improved.

• Journal of radiological science and technology
• /
• v.13 no.2
• /
• pp.1-14
• /
• 1990

As the institute of education teaching radiologic technology in Korea, different from others, junior college is the only institute which has been managed for it as a two-year educational course for 27 years since 1963 when it was established for the first time in our country irrespective of the needs of the times. But according to the development of medical equipment, variety of medical skill, increase of medical demands now a days, the supply of radiologic technology in modern medicine not only makes it advance as an inevitable factor but also broadens the area of its business systematically. Therefore, we got the following results after we had considered the necessity to lengthen the term of education and searched for the most reasonable way. 1. The term of study of the radiologic technologists in junior college must be lengthened to 3 years from 2 or 3 years regulated in the law of education. 2. In three-year curriculum, the subjects like basic medical science, science and engineering and ultramodern science, etc., which are lated to the new radiologic science must be taught in the junior colleges, and hospital practice also must be a compulsory subject in curriculum. 3. As the school years becomes longer, a lot of programs to make the study effective must be searched, researched and propelled forward.

• Journal of Engineering Education Research
• /
• v.19 no.5
• /
• pp.13-24
• /
• 2016

The purpose of this research is to examine the characteristics of team interaction according to the creativity of team members. Research subjects to achieve this purpose included 28 students who are in engineering education in the College of Education at A University in Daejeon and have taken robot-related courses. Through first and second MBTI, and TTCT tests, the final homogeneous and heterogeneous teams were formed, and an experimental study was conducted by developing team design activity assignment. The major research results were as follows. In terms of a comprehensive view on interaction frequency, both homogeneous team and heterogeneous team suggested had the highest frequency in suggesting opinions. However, each of the team members in the homogeneous team had different communication frequency among each other while each team member in the heterogeneous team had almost similar frequency. A microscopic analysis of the communication process of homogeneous team showed that the team members' roles were divided among each other in communication. Next, according to the microscopic analysis of the heterogeneous team's communication process, the team members exchanged opinions in the beginning, talked to themselves in words that were hard to understand the meanings, and they stopped having conversations in the end. Due to such decrease in communication, two team members could not solve the confusing state of being unable to understand each other's opinions and failed to complete their assignments. The microscopic analysis demonstrated that the homogeneous team had a smooth interaction, because when one team member suggested an opinion during a conversation, other team members agreed with it through a discussion. However, the members in the heterogeneous team experienced confusion as they could not understand each other's conversation and could not overcome this problem, leading to lack of conversations.

• Journal of Engineering Education Research
• /
• v.7 no.1
• /
• pp.51-63
• /
• 2004

The accreditation system for engineering technology programs has not been carried out in this country. For need of accreditation for engineering technology programs and development of evaluation criteria, we need analyses of accreditation procedures, rules and evaluation criteria. So we researched accreditation system and evaluation criteria with countries. These are signatories to the Sydney Accord under which approved engineering technology programs. Accreditation procedures and evaluation criteria are characteristic of the each countries which carried out accreditation system. We have to introduce accreditation system and develop evaluation criteria in our manner for advancing our engineering technology education of community college.

• Transactions on Electrical and Electronic Materials
• /
• v.11 no.1
• /
• pp.11-14
• /
• 2010

The interaction of -$Al(CH_3)_2$ with -OH on a fully OH-terminated Si (001) surface was studied using density functional theory. Two sites for $Al(CH_3)_3$ to react with the -OH on the surface were identified. The $-Al(CH_3)_2$ product energetically favored the dimer-row site rather than the inter-row site because the Al atom of $-Al(CH_3)_2$ at the dimer-row site was attracted by the lone pair electrons of the O atom in the neighboring -OH. The energy barrier for the transfer of the $-Al(CH_3)_2$ between the two sites was 0.11 eV, and therefore, the $-Al(CH_3)_2$ at the inter-row site can easily transfer to the dimer-row site at room temperature.