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An efficient method for the rapid micropropagation of Camptotheca acuminata from axillary buds was established by application of various plant growth regulators. Among various cytokinins, 0.5 mg L^(-1) BA showed the best performance on shoot multiplication, number average multiple shoots up to 10.8. The propagated shoot cuttings in vitro were elongated on NN basal medium without plant growth regulators. The secondary multiple shoots were induced at the site of initially induced buds. Rooting was induced directly near the base of the shoot on half-strength NN medium containing 0.5 mg L^(-1) of IBA, whereas high concentration of 1.0 mg L^(-1) IBA could induce callus at the base of the shoot. The camptothecin content, anticancer compound of the micropropagated plants was contained in various tissues. Camptothecin contents were 1.8 and 2.5 mg g^(-1) dry weight in stems from propagated in vitro and mother plant, respectively. This result may be used to develop strategies for large-scale propagation of elite C. acuminata trees.
Generation of biogenic amines (BAs) and physiological activities of Makgeolli, Korean rice wine, were investigated during fermentation under different temperatures (20, 25, and 30℃) and time (3, 5, and 7 days). The pH was 3.96~4.36 during fermentation and the acidity increased proportionally with temperature and time. Alcohol and total phenolic contents peaked on day 5 at 25 by 9.0~9.8% and 3.01±0.07 mg/g, respectively. The organic acid mostly produced was lactic acid, which increased gradually with temperature and time. Formation of biogenic amines comprised of tryptamine and putrescine was observed during fermentation: 6.91, 11.70, and 15.63 mg/mL of tyramine on day 7 at 20, 25, and 30℃, respectively. Antioxidant activities from DPPH and FRAP assay were high in the order of 25℃>20℃>30℃ while that from ABTS assay was high regardless of temperature. Processed at 1 mg/mL and 30℃, the inhibitory effect on α-amylase was 67.99±0.11, 73.64±0.43, and 75.51±0.26% on days 3, 5, and 7, respectively, which increased proportionally with temperature and time. Inhibitory activity on lipid accumulation in 3T3-L1 adipocytes was the highest in Makgeolli fermented on day 5 at 25℃. This study shows that fermentation at 25℃ for 5 days yields Makgeolli of the best quality with high bioactivities but no biogenic amines.
<Objectives> Personal information leakage has become a critical issue among Location-based Service (LBS) users. Apparently, the purpose of the present study was to explore the effects of perceived controllability, risk perception, and privacy concern with respect to intention to use location-based services. <Methods> A total of 200 men and women who have used location-based services participated in the online survey. Participants were recruited based on gender and age. <Results> The outcomes revealed the statistically significant mediating effect of risk perception between perceived controllability towards personal information leakage threat and the level of intention to use location-based services. Specifically, lower perceived controllability was observed to lead to higher levels of risk perception, which directed to lower levels of intention to use location-based services. In addition, moderate mediation effect concerning privacy concern was found. The effect of risk perception held significant for those with higher privacy concern and not for those with lower privacy concern. <Conclusions> This study confirms LBS users’ perceived controllability, risk perception, and privacy concern as the critical factors for understanding the mechanism of protecting themselves from threat to personal information leakage. <배경 및 목적> 최근 위치 기반 서비스 분야 내 개인정보 유출 피해 사례가 속출하는 상황에 주목하여, 본 연구는 이용자의인지된 통제성과 위험 인식 및 프라이버시 염려 등의 요인이 위치 기반 서비스 이용 의도에 어떠한 경로로영향을 미치는지 탐색적으로 규명하고자 하였다. <방법> 위치 기반 서비스를 알고 있으며 이용 경험이 있는 성인 남녀 200명을 대상으로 설문 조사를 실시하였다. 리서치 전문 기관인 엠브레인에 의뢰하여 진행하였으며, 남녀 비율 각각 50%, 연령 20∼50대 각각 25%씩할당하여 표집하였다. <결과> 먼저 개인정보 유출 위험에 대한 인지된 통제성이 위치 기반 서비스에 미치는 영향 관계에서 위험 인식이 매개적 역할을 한다는 것이 확인되었다. 즉, 인지된 통제성이 낮을수록 개인정보 유출에 대한 위험 인식 수준이 높아지고, 이에 따라 위치 기반 서비스 이용 의도가 낮아지는 매개 효과가 발생하였다. 또한 프라이버시염려가 낮은 경우에는 이러한 위험 인식의 매개 효과가 발생하지 않고, 프라이버시 염려가 높은 상황에서만매개 효과가 발생하는 조절된 매개 효과가 확인되었다. <논의 및 결론> 본 연구의 결과는 이용자의 인지된 통제성, 위험 인식, 개인의 프라이버시 염려 수준 등이 개인정보 유출 위험으로부터 스스로를 지키는 정보보호행동에 영향을 미치며, 이러한 것들이 위치 기반 서비스를 이용하는데 있어 주요한 변수임을 제시하였다.
According to A History of Modern Chinese Fiction, Eileen Chang (Zhang Ailing)’s fictions reflected not only cosmopolitan modernity but also traditional human relationship under the society of modern China. As her works recently have been paying attention, many research articles and dissertations published in Korea and western countries. The purpose of this study is to review and compare the research trend of Korean and western researches for the Eileen Chang’s fictions. While 4 dissertations and 57 research articles were published in Korea, 19 dissertations and 62 research papers have published in western countries since 1971. In the result of excluding the research themes thatinclude Eileen Chang’s life, movie, and essays, totally 12 dissertations and 40research articles were selected from them. Their researches on Eileen Chang’s fictions could be categorized into three major themes including feminism,colonialism, and narrative. Feminism, colonialism, and narrative were discussed by Korean and western researchers. Although Korean researches commonly described the female subjectivity in the aspect of feminism, western researchers emphasized the progress of female awareness in the Eileen Chang’s fictions. Similarly, there was contrast in the aspect of narrative in Korean and western studies. Interestingly, the loss of mental under the colonial era was commonly discussed in the aspect of colonialism. From the differences and common interest between the Korean and western researches, expanding the research field with the intertextuality and multi-aspect interpretation of traditional narrative will be important theme for the further studies.
본 연구는 정신건강에 대한 위험 인식이 정신건강서비스 모바일 앱 이용의도에 미치는 영향관계를 살펴보았다. 온라인으로 진행된 조사에는 총 227명의 성인 남녀가 참여하였다. 연구결과, 정신건강에 대한 위험 인식이 높을수록 e헬스리터러시가 높아지고, 이는 정신건강서비스 모바일 앱 이용의도에 정적인 영향을 미치는 매개효과가 검증되었다. 또한 정신건강서비스모바일 앱 이용의도에 대한 e헬스리터러시의 효과는 정신과 상담 태도와 상호작용함이 확인되었다. 즉, e헬스리터러시의 영향력은 정신과 상담 태도가 낮은 집단에서 크게 나타났다. 연구결과는 정신건강에 대한 위험 인식이 e헬스리터러시를 거쳐 정신건강서비스 모바일 앱 이용의도에 미치는 효과와 함께, 정신과 상담 태도의 조절적 역할을 보여주고 있다. 이를 통해정신건강서비스 모바일 앱 이용 증대 및 한국인의 정신건강 증진을 위해 e헬스리터러시를 높이기 위한 방안을 마련해야 할 필요성이 밝혀졌다. This study aims to explore the effects of perceived threat toward mental health on the intention for using a mobile mental health application. A total of 228 men and women participated in the online survey. Results confirmed the mediating role of e-Health literacy between perceived threat toward mental health and the level of intention to use a mobile mental health application. That is, a higher perceived threat led to higher levels of e-Health literacy, which resulted in higher levels of intention for using a mobile mental health application. Furthermore, the moderating role of attitudes toward mental health service was found. The effect of e-Health literacy was stronger for those with negative attitudes to mental health service than those with positive attitudes to mental health service. This study highlights on the important role of e-Health literacy for promoting the use of mobile mental health application and mental health.
기존 데이터 방송 시스템은 수신 단말이 완전한 애플리케이션 데이터를 획득하지 못한 경우 반복적으로 방송 애플리케이션 데이터 전체를 다운로드하는 매커니즘을 가지고 있다. 이 방식은 다운로드 시간이 길어지는 요인이 된다. 이러한 문제점을 개선하기 위해 본 논문은 리턴 채널을 활용하여 누락된 방송 애플리케이션 데이터를 효과적으로 다운로드하는 기법을 제안하고 실험을 통하여 제안된 기법의 비교 성능 평가를 보인다. The existing data broadcasting system has the mechanism that the receiving device should download repetitively the entire broadcasting application data until it acquires the whole of the application data. This mechanism takes long time for the download. To solve this problem this paper proposes a scheme that the device effectively downloads the missing parts of broadcasting application data through the return channel and shows the performance evaluations of the proposed scheme with respect to the experiment.
The purpose of this study was to illustrate the narrative features of Eileen Chang(Zhang Ailing)’s fictions, especially focusing on four fictions such as <牛>, <?香屑第一?香>, <傾城之戀>, <金??>, <??套>. Eileen Chang played an important role in the history of Modern Chinese fiction that her fictions reflect not only cosmopolitan modernity but also traditional human relationship under the society of modern China. Because Chinese people was facing the challenge in the change of social system under the ‘New Nation’ catch phrase since the Opium War(1840-1842), modern Chinese fiction corresponded to a large-scale socio-political, cultural reformation of traditional Chinese civilization. But collision of tradition and modernity brought an unexpected problems that the Chinese fictions were utilized as a political tools. As these trends damaged the artistry of Chinese modern fiction, Eileen Chang’s fictions have been recognized as excellent and special breakthrough aesthetic achievements that reflected the spirit of the modern Chinese people on the basis of the realities of life. First, Eileen Chang’s unique writing style was defined as “Uneven contrast 參差的對照” which linked a story with objective reality. Spatial and temporal juxtaposition of different cultures and temporalities maximized the aesthetic value of Eileen Chang’s fiction. Second, her writing forms which accommodated both traditional folk forms and the modern commercial forms appealed to the various layers of her target readers, “shanghairen上海人”. Last, Elieen Chang’s narrative dimension was a third-dimension mixed with first-person intimacy. It provided her readers the intimacy to each characters with the detailed description in real modern life. Chang completely erased sentimentalism in her description of her characters. Characters in her fictions were visualized and vitalized in the real life. Chang’s characteristic narratives provided the foundation to obtain the artistry, popularity and objectivity for her fictions to show the complexity of human nature.
According to A History of Modern Chinese Fiction, Eileen Chang (Zhang Ailing)`s fictions reflected not only cosmopolitan modernity but also traditional human relationship under the society of modern China. As her works recently have been paying attention, many research articles and dissertations published in Korea and western countries. The purpose of this study is to review and compare the research trend of Korean and western researches for the Eileen Chang`s fictions. While 4 dissertations and 57 research articles were published in Korea, 19 dissertations and 62 research papers have published in western countries since 1971. In the result of excluding the research themes that include Eileen Chang`s life, movie, and essays, totally 12 dissertations and 40 research articles were selected from them. Their researches on Eileen Chang`s fictions could be categorized into three major themes including feminism, colonialism, and narrative. Feminism, colonialism, and narrative were discussed by Korean and western researchers. Although Korean researches commonly described the female subjectivity in the aspect of feminism, western researchers emphasized the progress of female awareness in the Eileen Chang`s fictions. Similarly, there was contrast in the aspect of narrative in Korean and western studies. Interestingly, the loss of mental under the colonial era was commonly discussed in the aspect of colonialism. From the differences and common interest between the Korean and western researches, expanding the research field with the intertextuality and multi-aspect interpretation of traditional narrative will be important theme for the further studies.
본 연구의 목적은 어머니의 양육행동이 유아의 공격성에 미치는 영향과 그 과정에서 유아의 자기통제력의 매개효과 를 검증하는데 있다. 이를 위해 한국아동패널 7차년도 자료를 활용하여 만 5세 아동을 대상으로 본 연구에 부합하는 1,524 명을 표본으로 추출하였다. 연구분석은 위계적 회귀분석 방법과 Sobel test를 활용하였으며, 다음과 같은 연구결과가 도출 되었다. 첫째, 어머니의 온정적 양육행동은 유아의 공격성을 감소시키는 것으로 나타났지만, 어머니의 통제적 양육행동은 공격성에 영향을 미치지 않는 것으로 나타났다. 둘째. 유아의 자기통제력은 공격성에 부적인 영향을 미치는 것으로 나타났 다. 셋째, 어머니의 온정적 양육행동과 유아의 공격성의 관계에서 자기통제력의 부분매개효과가 나타났다. 이러한 연구결과 를 토대로 유아의 공격성을 낮추기 위한 다양한 프로그램의 개발과 보육현장에서의 실천적 대안을 제시하였다. This study aims to explain the effect of mother's child rearing behavior on aggression of young children and to verify the mediating effect of self-control between two variables. For the purpose, 1,524 children who fit this study among children aged 5 through 7th year of the Korean Children's Panel were selected. The data were analyzed by using the hierarchical regression method and the Sobel test. The main findings are as follows. First, the mother's warmth of rearing behavior was shown to decrease aggression of children, while mother's control of rearing behavior had no influence their aggression. Second, It was shown that the self-control of young children had a negative effect on their aggression. Third, self-control was shown to have a partial mediating effect in the relationship between the mother's warmth of rearing behavior and aggression of children. Accordingly, various programs to reduce the aggression of young children were suggested and an alternative plan was proposed to be applied to child care sites.