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"송혜인", "박동원", "안성옥", "김수균" 배재대학교 공학연구소 2015 공학논문집 Vol.17 No.1
모바일 게임은 간단한 조작과 짧은 라운드 형식으로 바쁜 현대인들을 위한 스트레스 해소용 게임으로써의 역할을 톡톡히 해내고 있다. 그 중에서도 자동실행 없이 직접 조작하여 게임에 집중하는 정도에 따라 점수를 매겨 성취감을 이끌어 낼 수 있는 러닝 어드벤처 게임이 몰입도가 높아 짧은 시간동안 힘든 일을 잊게 해주는 역할을 더욱 더 효율적으로 해낼 수 있다. 따라서 본 논문에서는 Unity 3D 엔진의 NGUI 플러그인을 이용하여 모바일 환경에서 간단한 조작으로 가볍게 실행시킬 수 있는 2D 러닝 어드벤처 게임을 설계하는 것을 목표로 한다. Mobile games are rolled into the as important games for the busy modern man with a simple operation. Among them is also the direct operation without Auto run ranked a score based on the degree to concentrate on the game be able learning adventure game that has led to the accomplishment commitment can do a role that you forget the hard work for a short period of time increased more efficiently. In this paper, using the engine of NGUI plug of Unity 3D, it aims to design a 2D-learning adventure game that can execute it with a simple operation in a mobile environment.
Park, Youngchan,Oh, Hyuncheol,Park, Jiseong,Choi, Woong,Ryu, Hyein,Seo, Daeha,Song, Hyunjoon American Chemical Society 2019 JOURNAL OF PHYSICAL CHEMISTRY C - Vol.123 No.37
<P>The generation of complex nanostructures to obtain novel characteristics and improved performance has been achieved by coupling multiple nanoscale reactions. Because reactions at the nanometer scale directly govern the morphology of nanostructures, understanding the reaction mechanism is critical to precisely control the morphology and, eventually, the physicochemical properties of the materials. However, because of the ensemble-average effect, investigating the reaction mechanism at the bulk level does not provide sufficient information. In this study, we investigated the overall sulfidation reaction mechanism that occurred on individual silver nanocubes in real time at high temperature. Using the single-particle dark-field imaging technique, three discrete steps of the sulfidation reaction were clearly resolved in the profiles of the plasmon peak shift and the intensity change of individual particles according to time progress: (I) reactant diffusion to the silver surface by passing through a ligand barrier, (II) silver sulfide formation by C-S bond cleavage of cysteine molecules, and (III) diffusion of silver atoms in the silver sulfide layer until the complete formation of silver sulfide. By a combination of simulation and control experiments, physical constants were derived for each step, which is completely hidden in the ensemble measurements. Each individual nanoparticle exhibited a large variation of physical values, such as the reaction rate constant and diffusivity, mainly resulting from the intrinsic structural heterogeneity. Dark-field microscopy image processing based on surface plasmon scattering would be helpful to analyze the reaction kinetics and understand the reaction mechanisms of the numerous multistep nanoscale reactions in real time with high spatial and temporal resolutions under actual reaction conditions.</P> [FIG OMISSION]</BR>
Lipase‐mediated lipid removal from propolis extract and its antiradical and antimicrobial activity
Park, Hyein,Bae, Song Hwan,Park, Yooheon,Choi, Hyeon‐,Son,Suh, Hyung Joo John Wiley Sons, Ltd 2015 Journal of the Science of Food and Agriculture Vol.95 No.8
<P><B>Abstract</B></P><P><B>BACKGROUND</B></P><P>Propolis contains many antioxidants such as polyphenols and flavonoids. However, propolis‐derived lipid components interrupt an efficient isolation of antioxidants from propolis extract. We examined the effectiveness of various lipase treatments for the removal of lipids from propolis extract and evaluated the biological features of the extract.</P><P><B>RESULTS</B></P><P>Lipase OF and Novozyme 435 treatments did not reduce fatty acid level in propolis extract. However, Lipozyme TL IM‐treated propolis extract showed a significant decrease in fatty acid level, suggesting the removal of lipids. Lipozyme RM IM also significantly decreased the fatty acid level of the extract, but was accompanied by the reduction of polyphenols and flavonoids, which are antioxidants. In Lipozyme TL IM treatment, an increase in active flavonoids, such as Artepillin C and kaempferide, was observed, with a slight increase of ferric reducing/antioxidant power (FRAP) radical‐scavenging activity. In addition, antimicrobial activity towards skin health‐related bacteria such as <I>Staphylococcus epidermidis</I> and <I>Propionibacterium acnes</I> was enhanced by Lipozyme TL IM treatment.</P><P><B>CONCLUSION</B></P><P>Lipozyme TL IM treatment effectively removes lipids from propolis extract and enhances antibacterial activity. Therefore, we suggest that Lipozyme TL IM is a useful lipase for lipid removal of propolis extract. © 2014 Society of Chemical Industry</P>
Kyeongwoo Park,Hyein Chang /Hyein Chang,Jin Pyo Hong,Myung Hyun Kim,Sohee Park,Jin Young Jung,Dahae Kim,Bong-Jin Hahm,Ji Hyun An 대한신경정신의학회 2024 PSYCHIATRY INVESTIGATION Vol.21 No.2
Objective This study aimed to investigate the association between gaming time and problematic game use (PGU) within a large sample of Korean male gamers and to examine the potential moderating effects of loneliness, living alone, and household size.Methods This study employed data from 743 male gamers from the National Mental Health Survey 2021, a nationally representative survey of mental illness conducted in South Korea. Self-reported data on the average gaming time per day, severity of PGU, loneliness, living alone, and household size were used.Results Gaming time was positively associated with PGU and this relationship was significantly moderated by loneliness such that the positive effect of gaming time on PGU was greater when the levels of loneliness were high. The three-way interaction effect of gaming time, loneliness, and living alone was also significant, in that the moderating effect of loneliness on the relationship between gaming time and PGU was significant only in the living alone group. However, household size (i.e., number of housemates) did not moderate the interaction between gaming time and loneliness among gamers living with housemates.Conclusion These results suggest the importance of considering loneliness and living arrangements of male gamers, in addition to gaming time, in identifying and intervening with individuals at heightened risk of PGU.