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Chung, Sung Yun,Kim, Sunyoung,Lee, Ju‐,Hyuck,Kim, Kyongjun,Kim, Sang‐,Woo,Kang, Chong‐,Yun,Yoon, Seok‐,Jin,Kim, Youn Sang WILEY‐VCH Verlag 2012 ADVANCED MATERIALS Vol.24 No.45
<P>An all‐solution‐processed flexible piezoelectric nanogenerator, composed of polycrystalline ZnO thin film and functional polymer layers such as P3HT/PCBM and PEDOT:PSS, generates energy through a mechanical rolling and muscle stretching system. On page 6022, Youn Sang Kim, Sang‐Woo Kim, and co‐workers show that this all‐solution‐processed nanogenerator is feasible as a piezoelectric patchable device and is promising for use in future energy harvesters such as wearable human patches and mobile electronics. </P>
Park, Jinbong,Jeon, Yong-Deok,Kim, Hye-Lin,Lim, Hara,Jung, Yunu,Youn, Dong-Hyun,Jeong, Mi-Young,Kim, Hyun-Ju,Kim, Sung-Hoon,Kim, Su-Jin,Hong, Seung-Heon,Um, Jae-Young Hindawi Publishing Corporation 2013 Evidence-based Complementary and Alternative Medic Vol.2013 No.-
<P>Obesity has become a major health threat in developed countries. However, current medications for obesity are limited because of their adverse effects. Interest in natural products for the treatment of obesity is thus rapidly growing. Korean Medicine (KM) is characterized by the wide use of herbal formulas. However, the combination rule of herbal formulas in KM lacks experimental evidence. According to <I>Shennong's Classic of Materia Medica</I>, the earliest book of herbal medicine, <I>Veratrum nigrum</I> (VN) has antagonistic features against <I>Panax ginseng</I> (PG), and the PG-VN pair is strictly forbidden. In this study, we have shown the effects of PG, VN, and their combination on obesity in high-fat (HF) diet-induced obese mice and in 3T3-L1 cells. PG, VN, and PG-VN combination significantly reduced weight gain and the fat pad weight in HF diet-induced obese mice. They also significantly decreased lipid accumulation and the expressions of two major adipogenesis factors, PPAR<I><I>γ</I></I> and C/EBP<I><I>α</I></I>, in 3T3-L1 cells. In addition, the PG-VN combination had synergistic effects compared with the mixture of extracts of PG and VN on inhibition of PPAR<I><I>γ</I></I> and C/EBP<I><I>α</I></I> expressions at lower doses. These results indicate a new potential anti-obese pharmacotherapy and also provide scientific evidence supporting the usage of herbal combinations instead of mixtures in KM.</P>
An Early-Maturing, High-quality and High-yielding Rice Variety "Oraebyeo"
Jin Kwan Ham,Young Boum Shin,Youn Sang Cho,Jae Rok Kim,Soon Kwan Hong,Yong Bok Kim,An Soo Lee,Jong Goo Sa,Seong Kyung Kim,Jeong Ki Hong 한국육종학회 2007 한국육종학회지 Vol.39 No.4
"Oraebyeo" is mutation of a high quality japonica cultivar, Ilpumbyeoa new japonica rice(Oriza sativa L.) cultivar developed from by N-methyl-N-nitrosourea(MNU) treatment on fertilized egg cell by the rice breeding team of Gangwon Provincial Agricultural Res. & Ext. Service in 2006. This variety heads 20 days earlier than Ilpumbyeo and similar to that of Odaebyeo an early maturing leading cultivar of northern plain area of Korea. Compared with Odaebyeo has a good semi-erect plant type with lodging tolerance due to much shortened plant hight(l2cm shorter than Odaebyeo). Oraebyeo has similar panicle number with Odaebye where as it has more spikelets per panicle. However, this variety less the ratio of ripened grains and 1,000 grain weight than those of Odaebyeo. The yield performance of this cultivar in milled rice was about 5.09MT/ha in local adaptability test conducted for three years 2002-2004 and 5.51MT/ha in the demonstration plot of farmer's field.
( Sung Guy Jin ),( Kyeong Soo Kim ),( Dong Wuk Kim ),( Dong Shik Kim ),( Youn Gee Seo ),( Toe Gyung Go ),( Yu Seok Youn ),( Jong Oh Kim ),( Chul Soon Yong ),( Han Gon Choi ) 영남대학교 약품개발연구소 2016 영남대학교 약품개발연구소 연구업적집 Vol.26 No.-
To develop a novel sodium fusidate-Ioaded triple polymer hydrogel dressing (TPHD). numerious polyvinyl alcohol-based (PVA) hydrogel dressings were prepared with various hydrophilic polymers using the freeze-thaw method. and their hydrogel dressing properties were assessed. Among the hydrophilic polymers tested, sodium alginate (SA) improved the swelling capacity the most, and polyvinyl pyrrolidone (PVP) provided the greatest improvement in bioadhesive stength and mechanical properties. Thus, PVA based-TPHDs were prepared using different ratios of PVP:SA The effect of selected PVP:SA ratios on the swelling capacity, bioadhesive strength, mechanical properties, and drug release, permeation and deposition characteristics of sodium fusidate-Ioaded PVA-based TPHDs were assessed. As the ratio of PVP:SA increased in PVA-Ioaded TPHD, the swelling capacity, mechanical properties, drug release. permeation and deposition were improved. The TPHD containing PVA. PVP, SA and sodium fusidate at the weight ratio of 10/6/1/1 showed excellent hydrogel dressing properties. release. permeation and deposition of drug. Within 24 h, 71.8 ± 1.3% of drug was released. It permeated 625.1 ±81.2μg/cm<sub>2</sub> through the skin and deposited of 313.8 ± 24.1 fLgfcm2 within 24 h. The results of in vivo pharmacodynamic studies showed that sodium fusidate-Ioaded TPHD was more effective in improving the repair process than was a commercial product. Thus, this sodium fusidate-Ioaded TPHD could be a novel tool in wound care.
( Sung Giu Jin ),( Abid Mehmood Yousaf ),( Kyeong Soo Kim ),( Dong Wuk Kim ),( Dong Shik Kim ),( Jin Ki Kim ),( Chul Soon Yong ),( Yu Seok Youn ),( Jong Oh Kim ),( Han Gon Choi ) 영남대학교 약품개발연구소 2016 영남대학교 약품개발연구소 연구업적집 Vol.26 No.-
The purpose of this study was to investigate the influence of different hydrophilic polymers on the swelling, bioadhesion and mechanical strength of hydrocolloid wound dressings (HCDs) in order to provide an appropriate composition for a hydrocolloid wound dressing system. In this study, the HCDs were prepared with styrene-isoprene-styrene copolymer (SIS) and polyisobutylene (PIB) as the base using a hot melting method. Additionally, numerous SISIPIB-based HCDs were prepared with six hydrophilic polymers, and their wound dressing properties were assessed. Finally, the wound healing efficacy of the selected formulations was compared to a commercial wound dressing. The swelling ratio, bioadhesive force and mechanical strengths of HCDs were increased in the order of sodium alginate> sodium CMC = poloxamer = HPMC > PYA = PVP, sodium alginate> sodium CMC = poloxamer > PYA> HPMC = PVP and sodium alginate > PYA >PVP = HPMC = sodium CMC> poloxarmer, respectively. Among the hydrophilic polymers tested, sodium alginate most enhanced the swelling capacity, bioadhesive force and mechanical strengths. Thus, the hydrophilic polymers played great role in the swelling, bioadhesion and mechanical strength of SISIPIB-based HCDs. The HCD formulation composed of PIB, SIS, liquid paraffin and sodium alginate at the weight ratio of 20/25/12/43 gave better wound dressing properties and more excellent wound healing efficacy than the commercial wound dressing. Therefore, the novel HCD formulation could be a promising hydrocolloid system for wound dressings.
( Sang Woong Youn ),( Tae Yoon Kim ),( Byung Soo Kim ),( Seung Chul Lee ),( Jeung Hoon Lee ),( Yong-beom Choe ),( Joo-heung Lee ),( Jee-ho Choi ),( Joo Young Roh ),( Seong Jin Jo ),( Eun-so Lee ),( Mi 대한피부과학회 2018 대한피부과학회 학술발표대회집 Vol.70 No.2
Background: The Phase Ⅲ studies, VOYAGE 1 and 2, were conducted to assess guselkumab for the treatment of patients with moderate to severe psoriasis. However, these studies included a worldwide study population. Objectives: To determine the efficacy and safety of guselkumab in Korean patients. Methods: This analysis included 28 patients from VOYAGE 1 and 98 patients from VOYAGE 2. In total, 126 patients were analyzed. Outcomes through week 28 were analyzed due to differences in design after week28. Results: Of 126 Korean patients randomized, 30 received placebo, 63 were assigned to guselkumab, and 33 received adalimumab. Guselkumab was superior to adalimumab in achieving an IGA 0 score (clear skin) at week 12 (31.7% vs 0.0%, p<0.001) and at week 24 (52.4% vs 21.2%, p=0.004), respectively. Among patients treated with guselkumab, 40 of 63 (63.5%) achieved a PASI75 response at week 8; at week 24, a significantly higher proportion of guselkumab patients achieved a PASI 75 compared to adalimumab patients (93.7% vs 66.7%, respectively, p<0.001). In addition, higher proportions of guselkumab patients achieved PASI 90 and PASI 100 than adalimumab patients at week 24 (PASI90; 73.0% vs 57.6%, p=0.168 / PASI100; 20.6% vs 15.2%, p=0.591, respectively). Through week 28, guselkumab and adalimumab showed comparable safety profiles. Conclusion: The efficacy and safety of guselkumab in Korean psoriasis patients through 28 weeks was consistent with findings reported for the VOYAGE1 and 2 trials.
The Study on the e-Service Quality Factors in m-Shopping Mall App based on the Kano Model
Sang-Oh Kim,Sun-Hee Youn,Myung-Jin Lee 한국유통과학회 2018 The Journal of Industrial Distribution & Business( Vol.9 No.12
Purpose - In this study, it is classified the service quality dimension of mobile shopping app using Kano model. In addition, it is evaluated quality factors suitable for strategic management from the viewpoint of service provider through mobile application through binary dimension analysis. Research design, data, and methodology - In this study, seven quality dimensions such as information quality, reliability, immediacy, convenience, design, security and customer service were derived through related studies to make binary shopping quality app quality measurement. 37 sub-variables were set by each quality dimensions. Each questionnaire was composed of positive and negative items like Kano's proposed method, and the satisfaction coefficient suggested by Timko(1993) was examined to understand the influence of each factors on customer satisfaction. Results - As a result of research, shopping app users perceived unity quality factor in most items of service quality dimension such as information quality, reliability, immediacy, convenience and customer service. In addition, the satisfaction coefficient showed a good impression, quick response of the result, fast delivery, and the unsatisfactory coefficient showed more interest in personal information such as payment method safety, and transaction security. As a result of research, shopping app users perceived unity quality factor in most items of service quality dimension such as information quality, reliability, immediacy, convenience and customer service. And, in information quality, the information overload was classified as an apathetic quality component, while the related information provision belonged to an attractive quality component. In reliability quality, customized service provision was classified as an attractive quality component. In instant connectivity, the quality of the connection during transport was classified as an attractive quality component. In convenience quality, access to product information was classified as a one-way quality component. All components of designs quality were classified as attractive quality components, and in security quality, all of their components were all classified as one quality component. Lastly, in customer service, they components were all classified as a single quality component. In addition, the satisfaction coefficient showed a good impression, quick response of the result, fast delivery, and the unsatisfactory coefficient showed more interest in personal information such as payment method safety, and transaction security. Conclusion - In the online service environment, which is difficult to differentiate in terms of upward upgrading only by technological implementation and function, the results of this study can be suggested as a differentiating factor for major channels with customers rather than improve the brand image.
Analysis of Google's success factors and direction1
Sang-Youn LEE,Se-Jin KIM 한국인공지능학회 2020 인공지능연구 (KJAI) Vol.8 No.2
Among the innovative companies leading the era of the 4th industrial revolution, the world's largest Internet company is Google. Google has grown by providing convenient services such as Internet search, Android smartphone operating system, and video. Now, Google is leading the global IT industry by continuing to develop in various new business fields based on open service platforms, artificial intelligence, and big data. In this study, an exploratory discussion was conducted on Google's success factors and future directions. The purpose of the research is to understand the development process of the IT field from the success factors of Google and to analyze the development direction of the future IT industry. Google's success factors were its open platform policy and successful acquisitions of external companies. In fact, most of the services Google offers come from companies that have acquired and acquired them. In addition, there was a corporate culture that values and supports the spirit of challenge and autonomy of members who are not afraid of failure. Based on this study's review of Google's direction analysis, the follow-up study will infer the direction of the IT industry in depth and look at the future technologies that IT majors need to prepare.