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Young Min Kim,Minhui Kim,Yujung Jung,Jiyoon Kim,Jung Soo Kim,Dong Hyun Kim,Sae-Byuk Lee,Juhyun Kim,Sang-Han Lee,Kwang-Deog Moon,Seockmo Ku,Deokyeong Choe 한국식품저장유통학회 2024 한국식품저장유통학회지 Vol.31 No.2
The oriental melon poses challenges in terms of long-term storage and distribution. Addressing these issues requires an extension of the storage life through appropriate processing. In this study, pretreated hot-air dried oriental melon slices (steamed and freeze-thawed) were prepared, and their physicochemical and organoleptic properties were examined. The control group (CON) consisted of hot-air dried oriental melon slices without pretreatment, while the steamed group (STG) and freeze-thawed group (FTG) consisted of hot-air dried oriental melon slices pretreated using steaming and freeze-thawing methods, respectively. The moisture contents detected in the CON, STG, and FTG groups ranged from 15.96% to 27.30%, with variations of 7.53 to 8.40 °Brix for the soluble solid contents. The CON group showed the highest Hunter color value for lightness (L*) and the lowest value for redness (a*). The texture profile analysis revealed the highest hardness and chewiness in the order of STG > CON > FTG. Considerable differences were observed in springiness and adhesiveness in the FTG group compared to the other groups. The organoleptic evaluation showed that the CON group had the highest sensory scores for overall preference. These findings indicate that the properties of hot-air dried oriental melon slices were influenced by physical pretreatments and that manufacturing these slices without pretreatment is the most effective method in terms of processing simplicity and cost efficiency.
김재욱(Jaeuk Kim),김성훈(Sunghun Kim),이유정(Yujung Lee),전영주(Youngju Jeon),김근호(Keunho Kim),김종열(Jongyoel Kim) 한국한의학연구원 2009 한국한의학연구원논문집 Vol.15 No.2
Recently, there have been emerging research activities in classifying the Sasang constitution objectively by machine-based methods. The concordance rate of the classification by the pulse wave features was, however, only around 50% up to now. In this paper, we introduce a novel classification algorithm that can promote the accuracy substantially at the expense of the non-classifiable subgroup as a byproduct. For instance, with the pulse wave features alone, we show that female/male subject group in their 20s can be classified into the Sasang constitution group with the concordance rate of 68.4%/65.5% for a subgroup of 57/29(31%/15%) subjects out of 184/195, by leaving the other subjects as the non-classifiable group. Next, we show that the pulse diagnosis has been used only as a supportive tool in determining one's constitution, and consequently the accuracy of the concordance ratio by the pulse wave features alone cannot exceed a finite value, which we estimate to be about 60%.
Automated CCTV Video Processing System to Prevent Child Abuse in Daycare Centers
Yujung Gil(길유정),Minjeong Kim(김민정),Sua Jang(장수아),Jihoon Kim(김지훈),Mokhali Muhammad Adib(아딥),Jin-Woo Jung(정진우) 한국정보기술학회 2022 Proceedings of KIIT Conference Vol.2022 No.12
본 논문에서는 아동학대 방지를 위해 어린이집 내 CCTV 영상을 효율적으로 반출하는 시스템을 제안한다. 먼저 아동 학대 데이터가 학습된 C3D 모델을 이용해 학대 의심 구간을 탐지하여, 사용자가 효율적으로 영상 반출 구간을 선택할 수 있도록 한다. 이후 YOLOv5와 StrongSORT 모델을 사용하여 프레임별로 얼굴 영역을 검출하며, 이에 해당하는 영역을 모자이크 처리하여 사용자에게 영상을 최종적으로 제공한다. 본 시스템을 통해, CCTV 영상 반출 시 모자이크 처리 관련 비용과 시간을 절약하고, 학부모의 CCTV 열람 접근성을 높일 수 있으며 이에 따른 아동학대 근절 효과를 기대한다. In this paper, we propose a system that efficiently takes out CCTV videos in daycare centers to prevent child abuse. First, by using a C3D model from which child abuse data has been learned, a section suspected of abuse is detected so that the user can efficiently select a section for exporting videos. Afterwards, the YOLOv5 and StrongSORT models are used to detect the face area for each frame, and the corresponding area is de-identified to finally provide the video to the user. Through this system, it is possible to save money and time-related to de-identification when CCTV videos are taken out, increase parents access to CCTV, and thereby expect the effect of eradicating child abuse.
Yujung Kim,Youjin Baek,Eun Woo Jeong,Seyoung Jung,Hyeon Gyu Lee 한국식품영양과학회 2021 한국식품영양과학회 학술대회발표집 Vol.2021 No.10
Taheebo extract (TE) from the inner bark of Tabebuia avellanedae has a potent anti-inflammatory activity; however, the utilization of taheebo extract (TE) as a nutraceutical in the food industry is limited due to its poor water solubility. This study aims to overcome the low water solubility and further enhance the anti-inflammatory effect of TE using two types of nanoencapsulation techniques. TE-loaded nanoliposomes (TE-NLs) and TE-loaded nanoparticles (TE-NPs) were prepared by the homogenization method and ionic gelation between chitosan and γ-poly glutamic acid, respectively. Nanoencapsulation significantly (p<0.05) increased the water solubility and thermal stability of TE. Especially, TE-NLs and TE-NPs increased the water solubility by 87% and 67%, respectively, compared with free TE. Both TE-NLs and TE-NPs exhibited a significantly (p<0.05) higher inhibition on lipopolysaccharide-induced NO production in RAW 264.7 cells than free TE. Thus, nanoliposomes and nanoparticles may be effective delivery systems for enhancing the water solubility, thermal stability, and anti-inflammatory effect of taheebo extract.
Kim Seulki,Choi Yujung,Lee Seonhwa,Ahn Moon Bae,Kim Shin Hee,Cho Won Kyung,Cho Kyung Soon,Jung Min Ho,Suh Byung Kyu 대한소아내분비학회 2020 Annals of Pediatirc Endocrinology & Metabolism Vol.25 No.3
Purpose: To analyze growth patterns over 2 years after birth according to preterm infant birth weight and length percentiles. Methods: Anthropometric measurements of 82 preterm infants were retrospectively reviewed. Preterm infants with birth weight or length below the 10th percentile were classified as small for gestational age (SGA) (n=19) and those between the 10th and 89th percentile as appropriate for gestational age (AGA) (n=63). The association between the length standard deviation score (SDS) at 2 years of corrected age and clinical factors were analyzed. Results: The length SDS of the SGA group was significantly increased at 6 months (-1.30±1.71) and 24 months (-0.97±1.06) of corrected age. The length SDS was lower in the SGA group than those in the AGA group at 6 months (-1.30±1.71 vs. -0.25±1.15, P=0.004), 18 months (-0.97±1.39 vs. -0.03±1.29, P=0.015), and 24 months (-0.97±1.06 vs. -0.29±1.12, P=0.022,). The percentage of children with a length SDS of <-2 (growth failure) at 24 months was 15.8% in the SGA group and 4.8% in the AGA group (P=0.108). Multiple linear regression analysis demonstrated that length at 24 months of corrected age was negatively correlated with birth length below the 10th percentile (coefficient β=-0.91, P=0.001) and duration of stay in the neonatal intensive care unit (NICU) (coefficient β=-0.01, P=0.001). Conclusion: Despite the fact that catch-up growth occurs during the early period of infancy in a large portion of preterm SGA infants, a significant portion of these infants show growth failure at 24 months of age. Growth over 2 years after birth is affected by birth length and duration of stay in the NICU in preterm children.
Line Drawing Mobile App using Hybrid Approach
Yujung Gil,Kiho Kim,Kwangil Kim 한국정보기술학회 2021 한국정보기술학회논문지 Vol.19 No.11
In recent years, image-to-image translation(I2I) has drawn much attention and shown noticeable success in many areas such as image synthesis, segmentation, style transfer, restoration, and pose estimation. Among these applications, the line drawing model, which is a subfield of style transfer, transforms any portrait picture into a line drawing. In these days, line drawing apps are very popular among young people. The most common feature of the current model is to delicately display all lines as if sketched with a pencil. Because of this, not only are the results not natural, but they are also less aesthetically interesting. In this paper, we design and implement a light and fast hybrid line drawing model which combines deep neural networks and traditional edge detection filter. We show that proposed model is efficient and outputs more aesthetically pleasing results.
Three-Dimensional Path Planning for Aerial Refueling Between One Tanker and Multiple UAVs
Yujung Yoon,Mingu Kim,Youdan Kim 한국항공우주학회 2018 International Journal of Aeronautical and Space Sc Vol.19 No.4
Path planning is considered for the aerial refueling of an unmanned aerial vehicle (UAV). The objective of the path planning considered in this study is to make a tanker and a UAV rendezvous at a preplanned point. To avoid abrupt maneuver of the UAV while minimizing energy consumption, rendezvous path planning as well as a guidance law is proposed. The proposed rendezvous path planning is constructed in two phases: approach phase which is the phase from the initial position to the transition, and rendezvous phase which is the phase from the transition to the preplanned point for rendezvous. The UAV performs speed control using the shape of the path and acceleration commands, and finally the UAV maintains the same velocity as the tanker to accomplish a refueling mission. Aerial refueling mission is generally performed between one tanker and multiple aircraft, and, therefore, a preplanned point is assigned to each UAV for the rendezvous. Numerical simulation is performed to demonstrate the performance of the proposed method.
Chang, Yujung,Lee, Euiyeon,Kim, Junyeop,Kwon, Yoo-Wook,Kwon, Youngeun,Kim, Jongpil Elsevier 2019 Biomaterials Vol.192 No.-
<P><B>Abstract</B></P> <P>The reprogramming of induced cardiomyocytes (iCMs) has shown potential in regenerative medicine. However, <I>in vivo</I> reprogramming of iCMs is significantly inefficient, and novel gene delivery systems are required to more efficiently and safely induce <I>in vivo</I> reprogramming of iCMs for therapeutic applications in heart injury. In this study, we show that cationic gold nanoparticles (AuNPs) loaded with Gata4, Mef2c, and Tbx5 function as nanocarriers for cardiac reprogramming. The AuNP/GMT/PEI nanocomplexes show high reprogramming efficiency in human and mouse somatic cells with low cytotoxicity and direct conversion into iCMs without integrating factors into the genome. Importantly, AuNP/GMT/PEI nanocomplexes led to efficient <I>in vivo</I> conversion into cardiomyocytes after myocardial infarction (MI), resulting in the effective recovery of cardiac function and scar area. Taken together, these results show that the AuNP/GMT/PEI nanocarrier can be used to develop effective therapeutics for heart regeneration in cardiac disease patients.</P>