• 대한가정학회지
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• 제42권12호
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• pp.107-122
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• 2004

The purposes of this study were to investigate the actual conditions of leisure life of the retired elderly in Korea and to analyze the difference of their leisure activity types by socio-demographic characteristics, the factors which have an effect on their satisfaction of leisure life. This study was secondary analysis of the national data; from The Social Statistics Survey; collected by the Korea National Statistical Office in 2000. The major findings are as follows. 1) The types of leisure activity of the retired elderly included watching television and doing nothing. 2) There were significant differences in the types of leisure activity by sex, age, education degree, having spouse or not, having house or not, and residential area. 3) Results of logistic regression analysis indicated that the most effective factors of the leisure life satisfaction were sex, age, having spouse or not, having house or not, residential area and the types of leisure activity.

• Archives of Pharmacal Research
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• 제9권3호
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• pp.163-167
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• 1986

Twenty six urea analogues, most of which have already been approved for human use, were tested for their antiurease activity in vitro. Cell-free extracts obtained from a clinical isolate of Proteus mirabilis was used as the source of enzyme. Acetohydroxamic acid which is a proven potent urease inhibitor but not approved for human use was again shown to be the most active compound among the tested. Phenacemide, cycloserine, and deferoxamine were demonstrated to be moderate inhibitors. Oxtetracycline, trimethoprim, and cefamandole revealed a demonstrable antiruease activity, but only at very high concentrations. The antiurease activity of cycloserine, trimethoprim, and cefamandole was pH dependent-only active at acidic pH. The inhibitory activity of acetohydroxamic acid however was independent of change in pH. The inhibitory activity of acetohydroxamic acid however was independent of change in pH. Hydrogen ion concentration plays an important role in urease activity and acidification (pH 5. 5) alone eliminates approximately 65% of the enzymic activity. Adjustment of pH therefore appears to be an important adjunct in reducing unrease activity and should always be studied to maximize the effcacy of antiurease compounds under investigation.

• 대한간호학회지
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• 제42권1호
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• pp.48-55
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• 2012

Purpose: The aim of this study was to compare statistical methods to control response bias in nursing activity surveys. Methods: Data were collected at a medical unit of a general hospital. The number of nursing activities and consumed activity time were measured using self-report questionnaires. Descriptive statistics were used to identify general characteristics of the units. Average, Z-standardization, gamma regression, finite mixture model, and stochastic frontier model were adopted to estimate true activity time controlling for response bias. Results: The nursing activity time data were highly skewed and had non-normal distributions. Among the 4 different methods, only gamma regression and stochastic frontier model controlled response bias effectively and the estimated total nursing activity time did not exceeded total work time. However, in gamma regression, estimated total nursing activity time was too small to use in real clinical settings. Thus stochastic frontier model was the most appropriate method to control response bias when compared with the other methods. Conclusion: According to these results, we recommend the use of a stochastic frontier model to estimate true nursing activity time when using self-report surveys.

• 천문학회보
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• 제39권2호
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• pp.83.2-83.2
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• 2014

Flare and rotational variabilities induced by stellar activity are important for studying the effect of magnetic fields on the evolution of red dwarf stars. The level and frequency of magnetic activity in these stars have a different aspect at every moment of the observations due to the effect of age-rotation relation. The use of both tracers is thus essential to have a relatively homogeneous set of stellar activity data for statistical studies. The archival light curves and imaging data of the open cluster M37 taken by MMT 6.5m telescope were used for this work. In order to achieve much more accurate photometric precisions and also to make the most efficient use of the data, the entire imaging database were re-analyzed with our new time-series photometry technique and carefully calibration procedures. Based on the new light curves, we study, for the first time, a variety of aspects of those two variabilities in red dwarfs and their relation to magnetic activity. In this talk, we present all observational evidences that support the idea that the strength of magnetic activity is closely connected with the rotation rate of a star and its evolutionary status (age-activity-rotation paradigm). In conclusion, we suggest future directions to improve our understanding of stellar activity in cool stars with photometric time-series data.

• 한국지능정보시스템학회:학술대회논문집
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• 한국지능정보시스템학회 2007년도 추계학술대회
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• pp.439-443
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• 2007

Nowadays, activity recognition becomes a hot topic in context-aware computing. In activity recognition, machine learning techniques have been widely applied to learn the activity models from labeled activity samples. Most of the existing work uses only one learning method for activity learning and is focused on how to effectively utilize the labeled samples by refining the learning method. However, not much attention has been paid to the use of multiple classifiers for boosting the learning performance. In this paper, we use two methods to generate multiple classifiers. In the first method, the basic learning algorithms for each classifier are the same, while the training data is different (ASTD). In the second method, the basic learning algorithms for each classifier are different, while the training data is the same (ADTS). Experimental results indicate that ADTS can effectively improve activity recognition performance, while ASTD cannot achieve any improvement of the performance. We believe that the classifiers in ADTS are more diverse than those in ASTD.

• 한국산학기술학회논문지
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• 제13권2호
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• pp.548-553
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• 2012

본 연구의 목적은 SNS 이용동기가 이용자들의 커뮤니케이션 활동성과 SNS를 통한 소통에 대한 몰입 또는 이해도, 즉 미디어 인게이지먼트에 어떠한 영향을 미치는가를 살펴보기 위한 것이다. 본 연구의 주요 연구결과는 다음과 같다. 첫째, 탐색적 요인분석을 통한 SNS 이용동기 측정항목에 대한 항목의 정화 결과, 세 가지 이용동기 요인이 추출되었으며, 각각의 요인은 정보지식획득동기(IKAM), 소통관계유지동기(CRMM), 의견정보제시동기(OIPM)로 나타났다. SNS 이용동기는 일반적으로 남성이 여성보다 다소 높았으며, 소통관계동기에서는 성별간 유의한 차이가 나타났다. 둘째, SNS 이용동기 중 소통관계유지동기와 의견정보제시동기는 이용자의 커뮤니케이션 활동성에 통계적으로 유의하게 정적인 영향을 미치는 것으로 나타났다. 셋째, SNS 이용동기 중 정보지식획득동기와 소통관계유지동기는 SNS를 통한 소통의 몰입과 이해도인 미디어 인게이지먼트에 긍정적인 영향을 미치는 것으로 나타났다.

• 대한한의학회지
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• 제32권1호
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• pp.97-108
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• 2011

Objective: This study aimed to analyze the utilization of Oriental medical services and its determinants among the elderly. Method: Data from a Korean longitudinal study of aging was used. Regression analysis was used to find the determinants of the utilization of medical care. Results: People with low education and low income were more likely to use Oriental medical services. Determinants of using Oriental health service were sex, marriage, income, subjective health condition, activity restriction due to pain, and chronic disease. Among them, only subjective health condition and activity restriction due to pain were significant determinants of frequency of and expenditure on Oriental medical services. Especially, activity restriction due to pain was a significant factor in the use of Oriental medical services, but not in the use of Western medical services. Conclusion: Treatment related to pain was closely associated with Oriental medical services. These treatments need to be developed with scientific and clinical evidence.

• 수산해양교육연구
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• 제26권2호
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• pp.308-315
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• 2014

The aims of this study are to analysis about surface muscle activity of lower and upper musculus erector spinae according to walkers form. The subjects of the current step is inconvenient to use a walker and five people over the age of 65 valid samples were selected as final. All the subjects were measured in three forms. Wireless EMG muscle activity is a measure of surface measurements were measured using a system, both musculus vastus lateralis, outside the erector spinae muscle, musculus biceps femoris, gastrocnemius muscle was attached to the channel electrodes. According to the results, First, gastrocnemius muscle activity showed significant differences by type of gait. Second, the muscle activity of the erector spinae muscle walking showed significant differences by type, side grip type showed the lowest muscle activity. Consequently, the present study is the efficient use of the four-wheel walker will provide the baseline data.

• 한국식품영양과학회지
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• 제28권1호
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• pp.100-106
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• 1999

Use of chemical preservative for controlling harmful microorganisms in food products has been debated due to public concerns about food quality because of perceived toxic and carcinogenic potential. Thus, use of non toxic natural antimicrobial agents has become essential. This study was investigated to determine the antimicrobial activity of water or ethanol extract of commercially available tea, and of solvent fractionated ethanol extracts obtained from steamed green tea. Both of water and ethanol extracts of green tea(steamed or roasted), oolong tea and black tea exhibited strong antimicrobial activity against gram positive and negative bacteria, but not effective against yeast and mold. Also, antimicrobial activity of ethanol extract of 4 different kinds of tea was stronger than that of water extract. Among 4 different tea, ethanol extract of steamed green tea was further fractionated. One thousand g/disk buthanol extract had the strongest antimicrobial activity against bacteria and mold. The concentration of the antimicrobial activity of buthanol extract in tested microorganisms ranged from 125~1000 g/disk except for Rhizopus javanicus. Antimicrobial activity of buthanol extract of steamed green tea was not destroyed by heating at 100oC for 60 min and at 121oC for 15 min, which is very stable over heat treatment. The inhibitory effect of the buthanol extract on the growth of Listeria monocytogenes and Staphylococcus aureus was investigated. Growth of both strains was started in the presence of 250 and 500 g/ml after 12 and 24 hour respectively, whereas complete inactivation of both strains was occurred in the presence of 1000 g/ml.

• 한국도서관정보학회지
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• 제44권2호
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• pp.97-116
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• 2013

이 연구는 독서와 마라톤을 접목하여 개발 운영한 공공도서관의 독서진흥 프로그램이 독서활동에 미치는 영향을 파악하기 위한 것이다. 이 연구를 위하여 문헌연구와 독서진흥 프로그램을 개발 운영하고, 참여자를 대상으로 설문조사와 면담을 실시하였다. 이 연구의 결과, 1) 독서마라톤 프로그램의 만족도가 높은 사람들이 독서량이 증가되고 도서관 이용 빈도가 더 많은 것으로 나타났다. 2) 독서마라톤 참여 이후에 가족들과 책에 관한 대화가 더 많은 것을 알 수 있었다. 독서마라톤 프로그램이 독서활동에 긍정적인 영향을 미치는 것으로 나타났다.