• KSII Transactions on Internet and Information Systems (TIIS)
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• 제15권7호
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• pp.2513-2530
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• 2021

With the fast development of information and communication technologies, video streaming services and applications are increasing rapidly. However, the network condition is volatile. In order to provide users with better quality of service, it is necessary to develop an accurate and low-complexity model for Quality of Experience (QoE) prediction of time-varying video. Memory effects refer to the psychological influence factor of historical experience, which can be taken into account to improve the accuracy of QoE evaluation. In this paper, we design subjective experiments to explore the impact of Short-Term Memory (STM) on QoE. The experimental results show that the user's real-time QoE is influenced by the duration of previous viewing experience and the expectations generated by STM. Furthermore, we propose analytical models to determine the relationship between intrinsic video quality, expectation and real-time QoE. The proposed models have better performance for real-time QoE prediction when the video is transmitted in a fluctuate network. The models are capable of providing more accurate guidance for improving the quality of video streaming services.

• 한국심리학회지 : 문화 및 사회문제
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• 제16권1호
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• pp.19-41
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• 2010

본 연구의 목적은 대학생의 종교지향과 종교적 원리주의가 주관적 웰빙과 어떤 관계가 있는지와, 웰빙에 대한 종교지향과 종교적 원리주의의 상호작용을 탐색하는 것이다. 본 연구의 대상자는 서울시에 위치한 한 대학에 재학하고 있는 374명의 대학생들이었으며, 그들의 평균 연령은 22.54(SD=4.79)세였다. 본 연구에서 사용된 심리검사는 I/E-R 종교지향척도, 종교적 원리주의척도, 영적안녕척도, 정서빈도검사, 삶의 만족척도, 주관적 행복척도, 삶의 동기척도 및 삶의 기대척도이다. 분석 결과, 종교를 가진 대학생은 그렇지 않은 대학생보다 종교적 안녕을 더 경험하고 있었지만 주관적 웰빙 수준은 더 높지 않았다. 대학생의 종교지향은 영적 안녕은 물론, 삶의 만족, 주관적 행복, 긍정정서 등과 같은 웰빙 변인과 관계가 있었다. 하지만 종교지향이 주관적 웰빙 변인과 공변하는 부분은 4~6%가량 밖에 되지 않았다. 종교적 원리주의는 영적 안녕이나 삶의 만족과는 정적 상관이 있었지만, 삶의 동기와는 부적 상관을 보였다. 한편, 대부분의 주관적 웰빙 변인과 종교지향의 관계에서 종교적 원리주의의 조절효과가 발견되었다. 단순주효과 분석결과, 종교적 원리주의 성향이 약한 대학생의 경우 종교지향이 수준에 따라 주관적 웰빙 수준에 큰 차이가 없었지만, 종교적 원리주의 성향이 강한 경우 종교지향이 수준이 강하면 그렇지 않은 것보다 실존적 안녕 수준이 높고 긍정정서나 행복감을 더 느끼고 삶을 만족하고 있었는데, 특히 미래의 삶에 대한 동기와 기대 수준이 매우 높았다. 이런 결과는 종교 관련 변인들이 상호작용하며 주관적 웰빙에 영향을 미칠 수 있다는 것을 시사한다.

• 한국지역사회생활과학회지
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• 제19권2호
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• pp.223-234
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• 2008

This study aimed to develop the elderly care program for seniors in rural areas and to evaluate its efficacy through pre- and post-tests. For them, this study carried out a total of 8 sessions that includes 4 aims, such as understanding rural elderly, volunteer activities, psychological help, and aids to daily living, on 36 persons over the age of 60 years in rural areas. The data was analyzed by paired t-test to 36 elderly. The results of the study are as follows. First, looking at changes in knowledge about aging, objective evaluation of knowledge showed significant differences (t=-2.22, p<.05), but evaluation of elderly's perception-change didn't show significant differences between before and after. Second, volunteer attitude didn't show significant differences between before and after, but after the training, 75% of them answered 'yes' to question that asked whether they'd like to participate in elderly's volunteer caring activity for other elderly within the town in the future, which gave us certain expectation that the attitude towards volunteer activities might change positively in the future. Third, objective evaluation of knowledge for psychological help didn't show significant differences between before and after. But elderly's subjective perception showed significant differences (t=-2.82, p<.01). Fourth, evaluating changes in knowledge for elderly's aiding daily life, both the objective evaluation and subjective evaluation didn't show significant differences between before and after. Fifth, satisfaction of the program showed high scores over 4 points: contents, education methods, education place, education time. The most helpful topics for them were counseling (27.8%) and dementia (27.8%), followed by elderly and aging (16.7%), elderly's residential environment (13.9%), elderly's dietary life (9.3%) and volunteer activities (5.6%).

• 가정과삶의질연구
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• 제23권2호
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• pp.137-148
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• 2005

This study compared one-child households' economic structures between those who determined not to have more children and those who have a birth plan. This study examined the demographic characteristics and economic variables such as income, consumption expenditures, assets. debt, and a subjective evaluation of future economic status. Especially, it compared the effects of socioeconomic variables on expenditures on a child between low-fertility and birth-planned households. From a questionnaire completed by a husband or wife of one-child households, 154 low-fertility households and 201 birth-planned households were obtained. A t-test, chi-square test, multiple regression analysis and a dummy variable interaction technique were used. The findings of this study are as follows: First, low-fertility households were older, had higher income, and had more educated, employed wives. Their marital duration was longer, and their child was older than those of birth-planned households. Second, low-fertility households had higher consumption expenditures than did birth-planned households. Especially, expenditures of apparel and shoes, health care, education, and entertainment were significantly higher for low-fertility households. Also, low-fertility households spent more than did birth-planned households on a child. However, low-fertility households had significantly more debt than did their counterparts, and their expectation level of future economic status were lower than that of birth-planned households. Third, the effects of socioeconomic variables on expenditures on a child were different between low-fertility and birth-planned households. Age, education level, husband's occupation, wife's employment status, income, net asset, and subjective evaluation of future economic status showed significant differences. Income elasticity of expenditure on a child was significantly higher for low-fertility households than their counterparts.

• 한국생활과학회지
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• 제13권3호
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• pp.441-451
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• 2004

This study categorized the households into four by the comparison of wives' and husbands' earned income, such as one with higher wives' income than husbands' in dual-earner households, with higher wives' income than husbands' in household with unemployed husbands, with lower wives' income than husbands' in dual-earner households, and with lower wives' income than husbands' in household with unemployed wives. This study compared and analyzed the objective and subjective economic well-being, and overall satisfaction of life in those households. Major results are below. First, the amount of expenditures, saving, debt were low in one-earner household with employed husbands, but average propensity to expenditure was high in those households. The amount of saving was low in one-earner households with unemployed husbands, but the average propensity to expenditure and debt were high, resulting in the low status of economic well-being. The amount of saving and monetary assets were high, but average propensity to expenditure and debt were low in households in which wives had higher income than husbands, resulting in the high status of economic well-being. Second, husbands' satisfaction for the level of family income was not different among four groups of households. Wives's satisfaction for those was the lowest when wives' income was higher than husbands', but the highest in households with unemployed wives. Wives' and husbands' expectations for the future economic well-being of the households were negative in households with unemployed husbands. On the other hand, the level of satisfaction of wives and husbands for their life was not different among four groups of households. Finally, four groups of households were discriminated by age of husbands, number of children, debt, and wives' expectation for the future economic well-being.

• 유통과학연구
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• 제13권8호
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• pp.61-71
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• 2015

Purpose - Before the year 2000, the housing prices in Korea were increasing every decade. After 2000, for the first time, Korea experienced a decrease in housing prices, and the repetitive cycle of price fluctuation started. Such a "boom and bust cycle" is a worldwide phenomenon. The current study proposes a mathematical model to explain price fluctuation cycles based on the theory of consumer psychology. Specifically, the model incorporates the effects of buyer expectations of future prices on actual price changes. Based on the model, this study investigates various independent variables affecting the amplitude of price fluctuations in housing markets. Research design, data, and methodology - The study provides theoretical analyses based on a mathematical model. The proposed model uses the following assumptions of the pricing mechanism in housing markets. First, the price of a house at a certain time is affected not only by its current price but also by its expected future price. Second, house investors or buyers cannot predict the exact future price but make a subjective prediction based on observed price changes up to the present. Third, the price is determined by demand changes made in previous time periods. The current study tries to explain the boom-bust cycle in housing markets with a mathematical model and several numerical examples. The model illustrates the effects of consumer price elasticity, consumer sensitivity to price changes, and the sensitivity of prices to demand changes on price fluctuation. Results - The analytical results imply that even without external effects, the boom-bust cycle can occur endogenously due to buyer psychological factors. The model supports the expectation of future price direction as the most important variable causing price fluctuation in housing market. Consumer tendency for making choices based on both the current and expected future price causes repetitive boom-bust cycles in housing markets. Such consumers who respond more sensitively to price changes are shown to make the market more volatile. Consumer price elasticity is shown to be irrelevant to price fluctuations. Conclusions - The mechanism of price fluctuation in the proposed model can be summarized as follows. If a certain external shock causes an initial price increase, consumers perceive it as an ongoing increasing price trend. If the demand increases due to the higher expected price, the price goes up further. However, too high a price cannot be sustained for long, thus the increasing price trend ceases at some point. Once the market loses the momentum of a price increase, the price starts to drop. A price decrease signals a further decrease in a future price, thus the demand decreases further. When the price is perceived as low enough, the direction of the price change is reversed again. Policy makers should be cognizant that the current increase in housing prices due to increased liquidity can pose a serious threat of a sudden price decrease in housing markets.

• 조명전기설비학회논문지
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• 제29권4호
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• pp.37-46
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• 2015

Lighting in a fashion shop has an effect on customers, highlights the products on the shelf, and has become more important. Even though lighting has a significant effect on customers, the studies on fashion shop lighting have primarily focused on how to create lighting which can influence customers' purchase behavior, and their awareness and expectation. On the contrary, it's been hard to find a study on a quantified fashion shop lighting plan considering customer confidence. In a current fashion shop lighting plan, display lighting is planned indiscreetly. Therefore, this study conducted an investigation of the light environment of the current fashion shop and museum exhibits lighting. Through such processes, the possibility of applying fashion store display lighting environments was investigated. Finally, for the assessment of museum exhibitions lighting applying fashion store display lighting environments, a subjective evaluation method using light simulation was proposed.

• 보건행정학회지
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• 제23권2호
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• pp.162-175
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• 2013

Background: The purpose of this study was to analyze the association between social support, psychosocial factors, and health behaviors of old adults in korean society. Methods: The data which was used in this study was extracted from the second wave of the Korean longitudinal study of aging in 2008. A total of 3,978 elderly aged 65 years or older were included in this study. We conducted $X^2$-test, t-test for the elderly health behavior in accordance with their social support and psychosocial factors. Also, multivariate logistic regressive analysis was performed in order to find how degree social support and psychosocial factors are associated with health behavior after adjusting sex, age, smoking (alcohol drinking), and other significant variables. The data was processed by SAS ver. 9.1 and Stata SE ver. 11. Results: Social support in older adults was significantly associated with lower smoking, alcohol drinking, exercise, and eating habit. Also, psychosocial factors were positively associated with smoking, alcohol drinking, regular exercise, and eating habit. Conclusion: health behaviors of old adults are likely to be vulnerable to social support and psychosocial factors. To increase effectiveness of the health policy for the elderly in Korea, it is important to adapt new strategy to include the empowerment of elderly's social networks, policy support to enhance subjective expectation, and life satisfaction.

• 대한지역사회영양학회지
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• 제5권1호
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• pp.36-49
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• 2000

The purpose of the study was to find the sociopsychological factors predicting the intention of compliance with the dietary regimen in diabetes with a questionnaire. Data were collected from 282 adult noninsulin-dependent diabetics in Seoul, Kyoggida, and Kyongsangbukdo in Korea. Stepwise multiple regression analysis was conducted with predictor variables from theories of the Health Belief Model, Social Cognitive Model, The Theory of Reasoned Action , and Social Support. The behavioral intention of compliance with the prescribed diet was the independent variable. Subjects norm self-efficacy knowledge about diet therapy, outcome expectation, relationship with medical team, threat of deterioration of disease, and social support were the independent variables, The mean score of behavior intention was high ie 35.3 out to 42. Subjective norm and self-efficacy were the significant variables to predict the intention of dietary compliance. These variables comprised 39% of the common variance. To increase dietary compliance by influence of the referents and improve self-efficacy significant referents must be included and concrete and practical methods to follow the dietary regimen must be provided in nutrition education.

• 여성건강간호학회지
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• 제21권2호
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• pp.139-149
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• 2015

Purpose: This study was to define and analyze the expectations of middle-aged woman to their spouse. Methods: A sample of 39 middle-aged women was recruited from the workplace, religious organization and acquaintances. The survey was conducted with participants using self-reported questionnaire. The data were analyzed using Q methodology. Results: There were four different types of expectations of middle-aged women. First type was "Collaborative and self-development type," meaning that women developed self and were collaborated with their family or spouses. The second type was "Maintain their own life" meaning that women recognized and maintained their expertise without interference from their spouses. The third one was "Respect for the inner value" meaning that women gave continued respect and understanding their inner value. The last one was "Realistic acceptance" meaning that women kept the current situation without implementing new self-development type. Conclusion: There is a subjective structure within the types of expectations of middle-aged women for a life of happiness to the spouse.