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한국어 학습자를 대상으로 하는 한국 역사문화 교육의 실제와 개선 방안
송시내 한국문화융합학회 2023 문화와 융합 Vol.45 No.9
The purpose of this paper is to present an educational plan to efficiently teach Korean history and culture to Korean learners in the field of Korean language education for foreigners. In this paper, we conceptualized history and culture, focusing on discussions on history and culture education at home and abroad. In addition, the categories of Korean history and culture were set and the main contents and characteristics of each category were investigated. As a result, it was confirmed that "history" or "historical culture" was included in the universal Korean curriculum and textbooks, and it was also included in the textbooks. However, in the current Korean language education, "historical culture" education has limitations in many ways, and as a way to improve it, cooperation with neighboring studies, development of curriculum based on demand surveys, and improvement of teachers' capabilities were suggested.
송시내,최귀준,김문규,( Tran Xuan Tin ),김희택 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.0
Polydiacetylene (PDA) has been studied as a self-assembly material that is able to confirm the results by visual inspection in response to specific conditions using its colorimetric characteristics, which is caused by a conjugated backbone of alternating double and triple bonds in Diacetylene (DA). We, in this study, focused on modification of PDA vesicles with crown-6-ether having the property to capture Pb2+ ion that particularly affects children’s physical growth. Furthermore, for the effective absorption of the heavy metal, the nanoporous silica (SiO2) was synthesized by leaching and calcination step though silica powder extracted from rice husk. Economic and environmental friendly characteristics was obtained at the same time, comparing with conventional experimental which is used expensive silanol precursor. Consequently we developed composites of PDA-SiO<sub>2</sub> to apply colorimetric detector for Pb2+ ion by the naked eye.
송시내,김문규,최귀준,( Tran Xuan Tin ),김희택 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.0
Nanomaterials have used for various field of industry with high reacting surface area caused from their nano-size, which is able to reach the similar effect goal with the less amount of usage than the conventional use. With this property, using the nano-sized material has a product produce an economical advantage. Dispersity, however, of nanomaterial in the compound without surfactant is a difficult task because Van der Waals existing and electrostatic repulsion action on the surface are interfered to form monodisperse. We proposed synthesis nano zinc oxide dispersed in nanoporous silica produced from rice husk under surfactant-free condition. Silica particle having high absorption property by the high specific surface area was extracted from rice husk ash then synthesized via sol-gel process. Nano zinc oxide was grown from its precursor at the inside of rice husk silica gel to disperse effectively.
송시내,조홍백,김희택 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.61 No.-
High surface area biogenic silica nanoparticles extracted from rice husks (RH) were synthesized through a surfactant-free process by employing a design optimization of the Taguchi approach. This approach is a systematic and efficient method to design factorial experiments with a minimum number of experiments. Here, the amount of rice husk ash, pH and aging time were adopted as design parameters to determine the particle size and structural properties including porosity and surface area in the synthetic process. The average particle size of silica nanoparticles ranging 24–87 nm and surface area to ∼740.77 m2/g could be tuned in the factorial optimization, where the degree of parameters that influence the structural properties were investigated, combined with surface characterizations. The surface area, pore volume and pore size of the samples were analyzed by adsorption–desorption characteristics of N2 gas. An amount of silica contents was analyzed by X-ray fluorescence for each step of RH treatment. Scanning electron microscopy and transmission electron microscopy were utilized to show the morphology and primary particle size of the silica nanoparticle. The analysis showed that the optimized experimental parameters calculated based on “signal” to “noise” ratio derived from Taguchi approach shortened the number of experimental variations with a noticeable improvement of surface area, whose individual effects are elucidated. This synthetic technology of biogenic nano silica with high surface area based on the Taguchi approach has potential for efficient time savings and quality control strategies to optimize the synthetic process.
Preparation and Characterization of Silicon composite from Rice Husk Ash
송시내,반가람,김희택 한국공업화학회 2016 한국공업화학회 연구논문 초록집 Vol.2016 No.1
Rice as the main grain in Asia, including Republic of Korea, has been produced about 424 ton in 2014(National Statistical Office, 2014). The Rice Husk, by-product generated after milling of rice, typically contains approximately 20% of rice in weight ratio and Rice Husk would be supplied about 85 ton as by-product through milling process in domestic. It could be resource of Biomass to utilize for practical use. Silica is relatively included in Rice Husk comparing with other crops. In case of Silica included Rice Husk, high purity Silica is obtained because of `Natural selectivity` process from roots of rice. In this study, we purpose to produce high purity Silica through Rice Husk separation process in by optimized experimental factors and then compound Silicon composite by using certain polymer.
Biodegradation Test of Polycaprolactone (PCL) Nanofiber Containing Rice Husk Silica Nanoparticle
송시내,최귀준,김문규,( Tran Xuan Tin ),김희택 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.0
The material for local healing in medical field need to satisfy the properties such as biodegradation and biocompatibility. Therefore we chose Polycaprolactone (PCL) to apply as the medical polymer and especially target for human bones because the hydroxyapatite (HA) is generated from the PCL after decomposition itself which the substance has a similar component composed of human bone. In this study, we focused on biodegradation rate over time of PCL nanofiber containing silica nanoparticle produced from rice husk though using electron spinning (E-spinning), based on the data of previous experimental. Then the degree of degradation over time was verified by a quantity of HA.