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Kim, Kwangin,Yoo, Taewon,Lee, Juheon,Kim, Myeongsoo,Lee, Sangrae,Kim, Gunhwi,Kim, Jinyoung,Han, Patrick,Han, Haksoo Elsevier Sequoia 2017 Progress in organic coatings Vol.112 No.-
<P><B>Abstract</B></P> <P>In this study, transparent thin films for coating material are synthesized by adding bulky CF<SUB>3</SUB> and hydroxyl groups intro into poly(amide-imide)s. As expected, these poly(amide-imide)s show higher shear adhesion and higher glass transition temperatures than the neat poly(amide-imide) due to hydrogen bonding of the hydroxyl groups. In addition, the modification to the poly(amide-imide) structure leads to only slight decreases in transmittance and yellow index.</P> <P>Consequently, the successful synthesis of poly(amide-imide)s with wide applications as transparent coating materials due to their optical properties and high adhesion is demonstrated. Transparent flexible display and coating products can be manufactured with poly(amide-imide)s having high reliability and a low chance of cracking due to their favorable thermal properties.</P>
엄태원(Taewon Uhm),이장우(Jang-Woo Lee),김경태(Gyeong-Tae Kim),양승구(Seung-Gu Yang),김주영(Joo-Young Kim),김재경(Jae-Kyung Kim),김승균(Seungkeun Kim) 한국항공우주학회 2021 韓國航空宇宙學會誌 Vol.49 No.10
무인기를 위한 자율 시스템은 임무 목표, 임무 상황, 무인기의 상태를 기반으로, 목표 달성을 위해 현재 수행할 행동을 결정하는 의사결정 능력을 가진다. 본 논문에서는 지형 충돌 위험이 있는 저고도 운용, 방문 순서를 변경하지 않아야 하는 항로점 집합, 임무 대상 객체의 위치 불확실성 등 현실적인 제약조건 하에서 감시정찰 임무를 자율적으로 수행할 수 있는 의사결정 시스템과 이러한 특성을 효과적으로 표현할 수 있는 임무 정의를 제시한다. 제안한 의사결정 시스템을 Hardware-In-the-Loop Simulation 환경에서 현실적인 임무 상황을 반영한 3종의 시나리오를 통해 검증한다. 무인기의 비행 경로와 임무 상황에서 의사결정 시스템이 선택한 행동을 시뮬레이션 결과로 제시하고, 그 결과를 논의한다. Autonomous system for UAVs has a capability to decide an appropriate current action to achieve the goal based on the ultimate mission goal, context of mission, and the current state of the UAV. We propose a decision-making system that has an ability to operate ISR mission autonomously under the realistic limitation such as low altitude operation with high risk of terrain collision, a set of way points without change of visit sequence not allowed, and position uncertainties of the objects for the mission. The proposed decision-making system is loaded to a Hardware-In-the-loop Simulation environment, then tested and verified using three representative scenarios with a realistic mission environment. The flight trajectories of the UAV and selected actions via the proposed decision-making system are presented as the simulation results with discussion.
P117 : Epidemiologic analysis on usage patterns of cosmetic products in Korea: part II
( Chan Hee Nam ),( Mi Soo Choi ),( Ji Seok Kim ),( Jee Young Kim ),( Seungphil Hong ),( Byung Cheol Park ),( Ha Krim Kim ),( Taewon Lee ),( Kyu Bong Kim ),( Myung Hwa Kim ) 대한피부과학회 2014 대한피부과학회 학술발표대회집 Vol.66 No.2
Background: Ingredients of cosmetics are able to pass in variable amount across the skin and generate adverse effects at given level of systemic exposure. Recently, cosmetic products are widely used even in adolescents and babies and the type and prevalence of cosmetic products for men are increasing prominently. Objectives: A database was created with person-oriented information regarding demographics of consumers and usage patterns for 72 kinds of cosmetics. Methods: We analyzed data from the online survey carried out 5 cities and 18,000 adults and adolescents comprising 908 males and 892 females ranged from 15 to 59 years completed the digital questionnaire. Results: - The average number of the cosmetic products which the participants use was 27.4 in women and 13.3 in men. The most commonly used products in men were shampoo, facial moisturizer and body cleanser. The use of base makeup and color makeup products of male respondents (21.7% and 32.3%, respectively) was reported to be quite higher than that of the past survey in other countries (0.5%). The average number of cosmetics for babies is 0.2 and the most commonly used products are lotion, shampoo and body cleanser. The teenagers use the average 24.1 cosmetic products and the commonly used ones in order are shampoo, lotion and hand cream. Conclusion: Our study provides valuable information on the usage pattern and exposure data of cosmetic products especially, in babies, teenagers and men
Kim, Hye Jin,Kang, Dong-Hoon,Yang, Seung-Hoon,Lee, Eunji,Ha, Taewon,Lee, Byung Chul,Kim, Youngbaek,Hwang, Kyo Seon,Shin, Hyun-Joon,Kim, Jinsik Hindawi 2018 Journal of analytical methods in chemistry Vol.2018 No.-
<P>Dielectrophoresis- (DEP-) based separation method between a protein, amyloid beta 42, and polystyrene (PS) beads in different microholes was demonstrated for enhancement of performance for bead-based fluorescent sensor. An intensity of ∇|<I>E</I>|<SUP>2</SUP> was relative to a diameter of a microhole, and the diameters of two microholes for separation between the protein and PS beads were simulated to 3 <I>μ</I>m and 15 <I>μ</I>m, respectively. The microholes were fabricated by microelectromechanical systems (MEMS). The separation between the protein and the PS beads was demonstrated by comparing the average intensity of fluorescence (AIF) by each molecule. Relative AIF was measured in various applying voltage and time conditions, and the conditions for allocating the PS beads into 15 <I>μ</I>m hole were optimized at 80 mV and 15 min, respectively. In the optimized condition, the relative AIF was observed approximately 4.908 ± 0.299. Finally, in 3 <I>μ</I>m and 15 <I>μ</I>m hole, the AIFs were approximately 3.143 and −1.346 by 2 nm of protein and about −2.515 and 4.211 by 30 nm of the PS beads, respectively. The results showed that 2 nm of the protein and 30 nm of PS beads were separated by DEP force in each microhole effectively, and that our method is applicable as a new method to verify an efficiency of the labeling for bead-based fluorescent sensor ∇|<I>E</I>|<SUP>2</SUP>.</P>
A novel pre-processing technique for improving image quality in digital breast tomosynthesis
Kim, Hyeongseok,Lee, Taewon,Hong, Joonpyo,Sabir, Sohail,Lee, Jung-Ryun,Choi, Young Wook,Kim, Hak Hee,Chae, Eun Young,Cho, Seungryong Wiley (John WileySons) 2017 Medical physics Vol.44 No.2
<P>Conclusions: In this work, we report a novel pre-processing technique that improves detectability of lesions in DBT and has potential advantages over the global threshold-based post-reconstruction processing technique. The proposed method not only increased the lesion detectability but also reduced typical image artifacts pronounced in conventional FBP-based DBT. (C) 2016 American Association of Physicists in Medicine</P>