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Chanhyung Lee(Chanhyung Lee),Jonghyeok Kim(Jonghyeok Kim) J-INSTITUTE 2024 Public Value Vol.9 No.-
Purpose: In Korean society, the use of scientific and data-based skin care and beauty equipment that can enhance skin improvement effects is rapidly increasing, and effectiveness research related to skin improvement effects is also increasing. This study was conducted with the purpose of proposing a smart beauty direction using skin care equipment for the sustainability of the Korean beauty industry, which is not limited to cosmetics exports. The contents of this study can help set the innovative direction of K-Smart Beauty. Method: In this study, to investigate the sustainability of the Korean beauty industry, we conducted a literature search related to the beauty industry published within the past 10 years in Korea Research Information Sharing Service, PubMed, and Google Scholar. Among them, a literature review was conducted on papers judged to be deeply related to the content of the study. Results: Smart beauty device utilizes convergence IT technology to measure physical condition and is becoming an innovative way to improve an individual's appearance to be healthy and beautiful. Providing a scientifically tailored beauty care method that individually considers the characteristics of each factor and type of the body can provide sophisticated and effective results, unlike beauty methods, and can scientifically reflect how to maintain and improve health. It is a system that exists. As a result of the study, the concept and licensing standards for non-medical health care services in Korea were confirmed through a literature review. We classified the types of smart beauty equipment, presented their main functions, and confirmed that a new leap forward is needed, including sustainability. Conclusion: Smart Beauty can be seen as a field that integrates the management of individual beauty and health by expanding the concept of Beauty & Health based on modern technology and knowledge. The scientific field of smart beauty equipment is an essential part, and therefore, the direction of research will require a hybrid type of research that combines the fields of natural science and social science.
Printed cylindrical lens pair for application to the seam concealment in tiled displays
Lee, Seunghwan,Lee, Seungjae,Yoon, Hyungsoo,Lee, Chang-Kun,Yoo, Chanhyung,Park, Jongjang,Byun, Junghwan,Kim, Geonhee,Lee, Byeongmoon,Lee, Byoungho,Hong, Yongtaek The Optical Society 2018 Optics express Vol.26 No.2
Effects of Surface Treatment on Work Function of ITO (Indium Tin Oxide) Films
Chanhyung Kim,Bongki Lee,Hee Jung Yang,Hyun Min Lee,Jae Gab Lee,신현정 한국물리학회 2005 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.47 No.3
The in uence of inductively coupled plasma (ICP) with CF4 gas on the surface electronic structures of Indium Tin Oxide (ITO) thin lms has been studied by X-ray photoelectron spectroscopy (XPS) and scanning force microscopy (SFM). XPS data showed signicant changes in core-level energies of In 3d5=2, Sn 3d5=2, C 1s and F 1s, implying changes in bonding states of these species after CF4 plasma treatment. Local current maps of ITO surfaces using conducting atomic force microscopy (C-AFM) showed two distinct regions at applied bias of 0.1 V: conducting and nonconducting regions. Local I-V measurements in the conducting regions of as received ITO showed ohmic behavior. Most of the ITO surfaces became non-conducting with Sckottky behavior after surface treatment with CF4 plasma. Kelvin Probe Force Microscopy (KPFM) showed an increase in work function of ITO by 0.8 eV after subsequent CF4 plasma treatment. When ITO flms were exposed in ambient, the work function of ITO decreased gradually, mainly because water molecules were absorbed onto the surfaces. CF4 plasma allowed the making of more negative surfaces with more dangling bonds of uorine ions (F..), and the surfaces with F.. induced electrons from the surfaces to be depleted. Subsequently, this caused the surface band to bend upward. As a result, the work function of ITO flms was increased by the surface treatment, and this helps to inject holes more eciently into the active light-emitting layer from ITO electrodes for improving the performance of organic-light emitting diodes (OLEDs).
Lee, Chul Won,Bae, Chanhyung,Lee, Jaeho,Ryu, Jae Ha,Kim, Ha Hyung,Kohno, Toshiyuki,Swartz, Kenton J.,Kim, Jae Il American Chemical Society 2012 Biochemistry Vol.51 No.9
<P/><P>Kurtoxin is a 63-amino acid polypeptide isolated from the venom of the South African scorpion <I>Parabuthus transvaalicus</I>. It is the first and only peptide ligand known to interact with Cav3 (T-type) voltage-gated Ca<SUP>2+</SUP> channels with high affinity and to modify the voltage-dependent gating of these channels. Here we describe the nuclear magnetic resonance (NMR) solution structure of kurtoxin determined using two- and three-dimensional NMR spectroscopy with dynamical simulated annealing calculations. The molecular structure of the toxin was highly similar to those of scorpion α-toxins and contained an α-helix, three β-strands, and several turns stabilized by four disulfide bonds. This so-called “cysteine-stabilized α-helix and β-sheet (CSαβ)” motif is found in a number of functionally varied small proteins. A detailed comparison of the backbone structure of kurtoxin with those of the scorpion α-toxins revealed that three regions [first long loop (Asp<SUP>8</SUP>–Ile<SUP>15</SUP>), β-hairpin loop (Gly<SUP>39</SUP>–Leu<SUP>42</SUP>), and C-terminal segment (Arg<SUP>57</SUP>–Ala<SUP>63</SUP>)] in kurtoxin significantly differ from the corresponding regions in scorpion α-toxins, suggesting that these regions may be important for interacting with Cav3 (T-type) Ca<SUP>2+</SUP> channels. In addition, the surface profile of kurtoxin shows a larger and more focused electropositive patch along with a larger hydrophobic surface compared to those seen on scorpion α-toxins. These distinct surface properties of kurtoxin could explain its binding to Cav3 (T-type) voltage-gated Ca<SUP>2+</SUP> channels.</P>
Second-mode semidiurnal internal tides on the continental slope of the southwestern East/Japan Sea
Lee, Hee-Yeol,Park, Jae-Hun,Jeon, Chanhyung,Seo, Seongbong,Kim, Dong Guk,Park, Young-Gyu,Min, Hong Sik,Kim, Sug-Dae BioOne (Coastal Education and Research Foundation) 2016 JOURNAL OF COASTAL RESEARCH Vol.75 No.special
Seasonal variation of semidiurnal internal tides in the East/Japan Sea
Jeon, Chanhyung,Park, Jae-Hun,Varlamov, Sergey M.,Yoon, Jong-Hwan,Kim, Young Ho,Seo, Seongbong,Park, Young-Gyu,Min, Hong Sik,Lee, Jae Hak,Kim, Cheol-Ho American Geophysical Union 2014 Journal of geophysical research. Oceans Vol.119 No.5
The seasonal variation of semidiurnal internal tides in the East/Japan Sea was investigated using 25 month long output from a real-time ocean forecasting system. The z coordinate eddy-resolving high-resolution numerical model, called the RIAM ocean model, incorporates data assimilation that nudges temperature and salinity fields together with volume transport through the Korea Strait to produce realistic oceanic currents and stratification. In addition to atmospheric forcing, it includes tidal forcing of 16 major components along open boundaries. The model generates energetic semidiurnal internal tides around the northern entrance of the Korea Strait. Energy conversion from barotropic to baroclinic (internal) tides varies seasonally with maxima in September (ranging 0.48-0.52 GW) and minima in March (ranging 0.11-0.16 GW). This seasonal variation is induced by the seasonality in stratification near the southwestern East/Japan Sea. The propagation distance of the internal tides is associated with generation intensity and wavelength. From late summer to early winter, the semidiurnal internal tides travel relatively far from the generation region due to stratification changes; its energy dissipates less as a result of longer wavelengths. Our results suggest that spatiotemporal variation of internal-tide-induced mixing due to the seasonality in the generation, propagation, and dissipation of internal tides should be considered for a more realistic simulation of water masses and circulation in models of the East/Japan Sea.