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        • Social Network Use by Involvement among Chinese Young Users

          Choo-Hui,Park,Yong,June,Kim 성균관대학교 현대중국연구소 2014 성균관대학교 현대중국연구소 국제학술회의 Vol.- No.20

          '스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 7시까지 원문보기가 가능합니다.

          This research focuses on the use of social network sites (SNS) among young Chinese users. There are two objectives of this study. First. the paper examines the characteristics and current situations of SNS in China. The second is to examine the relationship between the types of involvement and the intensity of SNS use. This study uses data from 200 samples, mostly young Chinese users in Beijing, China. Factor analysis suggests four factors: personal involvement in usefulness and usage, physical involvement in trust, and situational involvement in relationships. The total variance explained by all four factors is 67.82 percent. Personal involvement on usefulness accounts for most (33.12%) of the explained variance, followed by physical involvement 111 trust (13.47%). In general, correlation results show that there are significant relationships between the intensity to use SNS and all types of involvement. Personal involvement in usefulness shows a very strong relationship with the intensity of SNS use(cor=.93). Through regression, the result suggests that only personal involvement in usefulness and physical involvement in trust are in the model, with a value of 88.5 percent for R2, which significantly explains the intensity of SNS use. The results from this study provide insightf비 information on how different types of involvement can mfluence users' intensity of SNS use. The mostly frequently used social network sites among participants for this study are Renren, QQ(Qzone) and Sina Space.

        • Intensity of Social Network Use by Involvement : A Study of Young Chinese Users

          Choo-Hui,Park,Yong,June,Kim 성균관대학교 현대중국연구소 2013 성균관대학교 현대중국연구소 국제학술회의 Vol.- No.19

          '스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 7시까지 원문보기가 가능합니다.

          This research focuses on the use of social network sites (SNS) among young Chinese users. There are two objectives of this study. First, the paper examines the characteristics and current situations of SNS in China. The second is to examine the relationship between the types of involvement and the intensity of SNS use. This study uses data from 200 samples, mostly young Chinese users in Beijing, China. Factor analysis suggests four factors: personal involvement in usefulness and usage, physical involvement in trust, and situational involvement in relationships. The total variance explained by all four factors is 67.82 percent. Personal involvement on usefulness accounts for most (33.12%) of the explained variance, followed by physical involvement in trust(13.47%). In general, correlation results show that there are significant relationships between the intensity to use SNS and all types of involvement. Personal involvement in usefulness shows a very strong relationship with the intensity of SNS use(cor=.93).Through regression, the result suggests that only personal involvement in usefulness and physical involvement in trust are in the model, with a value of 88.5 percent for R², which significantly explains the intensity of SNS use. The results from this study provide insightful information on how different types of involvement can influence users' intensity of SNS use. The mostly frequently used social network sites among participants for this study are Renren, QQ(Qzone) and Sina Space.

        • KCI등재SSCISCOPUS

          Korean Version of Mini Mental Status Examination for Dementia Screening and Its Short Form

          Tae,Hui,Kim,주진형,박준혁,김정란,Seung,Ho,Ryu,문석우,Il,Han,Choo,Dong,Woo,Lee,윤종철,Yeon,Ja,Do,이석범,김문두,김기웅 대한신경정신의학회 2010 PSYCHIATRY INVESTIGATION Vol.7 No.2

          '스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 7시까지 원문보기가 가능합니다.

          ObjectiveaaWe developed a Korean version of Mini-Mental Status Examination (MMSE)optimized for screening dementia (MMSE-DS) and its short form (SMMSE-DS). MethodsaaWe constructed the MMSE-DS using the items of the two current Korean versions of MMSE and then construct the SMMSE-DS consisted of 13 items from the MMSEDS based on the diagnostic accuracy of individual items for dementia. We investigated reliability and validity of MMSE-DS and SMMSE-DS on 1,555 subjects (1,222 nondemented controls,333 dementia patients). We compared the diagnostic accuracy of the SMMSE-DS with that of the three full Korean versions of MMSE, and examined its age- and education-specific optimal cutoff scores for dementia. ResultsaaThe internal consistency obtained by Cronbach's coefficient alpha was 0.826. The inter-rater reliability and test-retest reliability were 0.968 (p<0.001) and 0.825 (p<0.001), respectively. It showed significant correlation with the Clinical Dementia Rating (CDR) (r=-0.698,p<0.05) and the three full Korean versions of MMSE (r=0.839-0.938, p<0.001). The area under the receiver operator curve for dementia of the SMMSE-DS was larger than those of the three full Korean versions of MMSE (p<0.001). Age, education and gender explained 19.4%of the total variance of SMMSE-DS scores. The optimal cutoff scores for dementia of the SMMSE-DS were estimated differently by age and educational attainment of the subjects. ConclusionaaThe SMMSE-DS was found to be accurate, brief and portable instrument for screening dementia in Korean elders, and may be particularly useful for screening dementia in elderly populations with wide variation in educational levels.

        • 비콘을 이용한 사용자레이어 분리 시스템

          양희규 ( Hui-gui Yang ), 염상길 ( Sanggil Yeoum ), 추현승 ( Hyun-seung Choo ) 한국정보처리학회 2019 한국정보처리학회 학술대회논문집 Vol.26 No.1

          제안 시스템은 모바일 사용자를 공공 인터넷 환경에서 사용 유형별로 분류 및 관리 가능한 서비스를 제공한다. 비콘을 이용하여 시스템 사용자의 위치와 서비스공간의 근접성을 확인한다. 또한 사용자의 서비스 사용 형태 및 성향에 따라 서비스 제공 장소에서 네트워크에 연결된 사물 인터넷 기기 및 기타 기기에 대한 접근 권한을 미리 정의하고 이를 제공할 수 있다. 본 연구는 이러한 시스템을 제안하고 구현된 결과를 바탕으로 시스템의 기능을 분석한다.

        • 우리 나라 청정지역에서 측정한 ??? 입자의 특성

          문길주,김희강,정용승,이종훈,김용표,이종범 한국교원대학교 환경과학연구소 1998 환경연구논문집 Vol.- No.4

          Atmospheric fine particles(???) were collected at the background sites, Kangwha, Taean, and Kosan and characterized to understand their behaviors at the sites. Daily samples of ?? mass were measured and ionic species, carbonaceous species, and gaseous species were analyzed. Four-day backward trajectory analysis was also carried out. The mean concentrations of anthropogenic species were highest at Kangwha among three site, while contributions from sea salts were highest at Taean during the measurement period due higher wind speed at Taean. Major chemical components in fine particles were sulfate, organic carbon, nitrate, and ammonium. Most of the non-sea-salt(nss) sulfates in ???? might be present as ammonium sulfates at these sites. Most air parcels arriving at Kangwha and Taean were from northern China. Therefore, both sites were thought to be affected by the same air parcel. At Kosan, during the measurement period, air parcels were from either northern China or southern China. The nss sulfate concentration in the air parcels from southern China was higher, while the nss calcium, nitrate, and ammonium concentrations were higher when the air parcels were from northern China.

        • Understanding impulsive buying of fashion products

          Soo-Hyun,Jun,Choo-Hui,Park 한국마케팅관리학회 2019 한국마케팅관리학회 학술대회 Vol.2019 No.10

          The purpose of this study was to investigate effects of personal characteristics, motivations for mobile shopping and mobile shopping chmateristics on impulsive buying behaviors of fashion products. This study examined appearance evaluation, appearacne orientation and self-depreciation as the personal characteristics, utilitarian expectancy and hednoic expectancy as the mobile shopping motivations, and personalization, ubiquity and security as the mobile shopping characteristics. While most reserachers have applied a single factor model to measure impulisve buying, this study applied Chang's (2009) four domains to meausre the impulsive buying (i.e., provocative, reminder, affective, situational). According to the results of the multiple regression analysis, self-depreciation, appearance evaluation, appearance orientation, ubiquity and personalization were positively associated with the provocative impulsive buying. Utilitarian expectancy, ubiquity and appearance evaluation were positively assoicated with the reminder impulsive buying. Appearance evaluation, self-depreciation, hedonic expectancy and appearance orientation were positively associated with the affective impulsive buying. Finally, Apearance evaluation and self-depreciation were positively associated with situational impulsive buying. Based on these findings, implications were suggested and limitations were discussed.

        • KCI등재

          Bacillus amyloliquefaciens(SRCM 100730)로 발효된 청국장 추출물의 RAW 264.7 대식세포 면역증강 활성

          추승빈(Seung Bin Choo), 양혜(Hui Yang), 정도연(Do-Yuon Jeong), 정성엽(Seong-Yeop Jeong), 류명선(Myeong Seon Ryu), 오광훈(Kwang-Hoon Oh), 유영춘(Yung Choon Yoo) 한국식품영양과학회 2017 한국식품영양과학회지 Vol.46 No.11

          청국장은 한국의 전통발효식품으로서 다양한 생리활성이 보고되어 있다. 본 연구에서는 B. amyloliquefaciens 균종에 속하는 신규한 균주인 B. amyloliquefaciens(SRCM 100730)에 의한 발효 청국장이 선천면역 세포인 RAW 264.7 대식세포를 활성화하는 효과를 가지는가를 검토하였다. 청국장 추출물을 RAW 264.7 세포에 처리한 결과 처리농도에 의존하여 TNF-α와 NO의 생성이 증가하였으며, 이러한 면역조절 물질의 증가는 iNOS와 TNF-α mRNA 발현에서도 확인되었다. 또한, 청국장 추출물에 의한 대식세포 활성화와 관련한 세포 내 작용기전을 해석한 결과 청국장 처리에 의해 p38과 ERK와 같은 MAPK의 인산화와 NF-κB 활성화가 유도되는 것으로 밝혀졌다. 하지만 MAPK에 속하는 JNK에 대해서는 아무런 영향을 주지 않는 것으로 나타났다. 한편 청국장 추출물을 LPS와 함께 처리한 실험에 있어서 청국장 추출물은 LPS에 의한 대식세포 활성화를 촉진하여 TNF-α와 NO의 생성을 증가시키는 시너지 효과를 나타내었다. 이들 결과로부터 B. amyloliquefaciens(SRCM 100730) 균주로 발효한 청국장 추출물은 대식세포를 활성화하여 선천면역을 증가시키는 효과가 있는 것으로 확인되었다. Cheonggukjang is well known as a traditional fermented food in Korea and has various biological activity. In this study, immune-enhancing activity of extract of cheonggukjang fermented with Bacillus amyloliquefaciens (SRCM100730) was examined in RAW 264.7 murine macrophages. Treatment with extract augmented production of nitric oxide (NO) and tumor necrosis factor-α (TNF-α) from RAW 264.7 macrophages in a dose-dependent manner. Similarly, increased mRNA expression of inducible nitric oxide synthase (iNOS) and TNF-α was observed. In addition, the extract synergistically enhanced production of NO and TNF-α from lipopolysaccharide (LPS)-stimulated macrophages. Analysis of intracellular pathways revealed that the immune-enhancing activity of cheonggukjang extract was related to activation of mitogen-activated protein kinases (MAPK) and nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB). These results suggest that cheonggukjang fermented with B. amyloliquefaciens (SRCM100730) is a beneficial food effective for activation of immune responses.

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