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Preparation of melanoidin/TiO<sub>2</sub> composites with improved UV screening ability
김나형,김혜원,오성근 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0
Melanoidin/TiO<sub>2</sub> composites were prepared to enhanced UV blocking ability. TiO<sub>2</sub> microspheres were synthesized through surfactant-assisted sol-gel method followed by carboxylation on TiO<sub>2</sub> surface to introduce chemical binder. Then, dihydroxyacetone (DHA) was grafted on TiO<sub>2</sub> by esterification between carboxyl groups of TiO<sub>2</sub> and hydroxyl groups of DHA. The melanoidin/TiO<sub>2</sub> composites were obtained by the Maillard reaction between DHA/TiO<sub>2</sub> and arginine. The synthesized melanoidin/TiO<sub>2</sub> composites provided the broad range of UV protection properties from 280 nm to 400 nm and reduced intrinsic white cast phenomena of TiO<sub>2</sub> by exhibiting brown color. It is expected that the hybrid composites can be applied in cosmetic field.
식생활라이프스타일과 재생건축 레스토랑의 만족, 브랜드 이미지, 재방문의도와의 관계
김나형 한국식공간학회 2018 식공간연구 Vol.13 No.3
This study looks into how food-related lifestyle affects a regenerative architecture restaurant in terms of satisfaction, brand image and revisit intentions based on data from consumers having visited the regenerative architecture restaurant. The data were analyzed with SPSS 18.0 and AMOS 21.0. Findings from the study show that food-related lifestyle has a significant impact on satisfaction with the regenerative architecture restaurant in the order of taste-, health- and design-driven type. Second, the same result was found regarding the brand image of the restaurant. Third, satisfaction with the regenerative architecture restaurant significantly affects revisit intention. Finally, the brand image of the regenerative architecture restaurant has a significant impact on revisit intention of consumers. The study indicates that research and investment to develop differentiating taste of food menu is critical in building a strategy to operate a regenerative architecture restaurant. The practical significance of that would be that it offers some guidelines to build a strategy for regenerative architecture restaurants on the rise and also provides helpful information and implications for future restaurant operation.
오프로드 자율주행을 위한 딥러닝 기반 의미론적 분할 모델 비교
김나형,안종현 한국지능시스템학회 2023 한국지능시스템학회논문지 Vol.33 No.5
현재 자율주행 기술은 도심에서 다니는 일반 차량에 대하여 활발한 연구가 이루어지고 있다. 그에 반해 비포장도로의 자율주행에 대한 연구는 복잡한 지형, 불규칙한 주행조건과 같은 제약들로 인하여 더 많은 노력을 필요로 한다. 본 논문은 다양한 딥러닝 기반의 의미론적 분할네트워크들을 활용하여 오프로드 환경에서의 주행가능 영역을 판별하고 성능을 비교한다. 기존 자율주행 연구에 활용되는 데이터셋과는 달리, 본 연구에서는 오프로드 환경을 반영한Rellis-3D 데이터셋을 타겟으로 한다. 주어진 데이터셋에 대해 해당 모델들의 성능을 비교하고 평가하기 위해서 Intersection over Union(IoU)와 Flops Per IoU (FPI)을 평가 기준치로사용한다. 이를 통해 오프로드 환경에서의 주행가능영역을 판별하는 데 가장 효율적인 네트워크를 선정한다. In self-driving, technology is being actively researched for general vehicles runningin the city. On the other hand, research on self-driving on unpaved roads requiresmore effort due to limitations such as complex terrain and irregular drivingconditions. This paper uses various deep learning-based semantic segmentationnetworks to determine the traversable area in an off-road environment and comparetheir performance. Unlike datasets used in existing autonomous driving research,this study targets the Rellis-3D dataset that reflects off-road environments. Intersection over Union (IoU) and Flops Per IoU (FPI) are used as evaluationcriteria to compare and evaluate the performance of the models for a given dataset. Through this, the most efficient network is selected to determine the drivable areain an off-road environment.
김나형,Kyu-Yeob Kim,김정아,김영호,강인철,김형민,정현자 경희대학교 융합한의과학연구소 2010 Oriental Pharmacy and Experimental Medicine Vol.10 No.3
Acanthopanax Koreanum stem (AK) has been used in Korea as a tonic and sedative as well as a drug with ginseng like activities. The purpose of our present study was to investigate the effects of AK extract (AKE) and Eleutheroside E, major component of AKE on an exacerbated immune function through utilization of protein-energy malnutrition (PEM) diet by using forced swimming test (FST). The immobility time were significantly decreased in the AKE or Eleutheroside E-administrated group compared with the control group on the FST (P < 0.05). The level of blood parameters were not changed significantly. PEM-induced weight loss of mice was reduced by oral administration of 500 mg/kg AKE. AKE oral administration improved the nutritional status such as the food efficiency ratio and the adrenal gland weight. AKE treatment significantly increased the production of interferon (IFN)-γ compared with unstimulated splenocytes but not interleukin (IL)-4. Eleutheroside E also significantly increased the IFN-γ production but not IL-2 and IL-4 in T cell line, MOLT-4 cells. These results suggest that AKE and Eleutheroside E may influence to immune-enhancing through increasing the physical endurance capacity and immune cell activation.