• Journal of Digital Convergence
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• v.11 no.9
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• pp.127-138
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• 2013

This study aims to grope for the factors that can influence consumer when they evaluate sports centers' service multilaterally in order to draw strategic operation methods for sports centers. This article examines the relationship among sports centers' service guarantee, service quality, service value, customer satisfaction, and customer loyalty. This study selects 2 sports centers located in Seoul and then conducts a survey to 200 members of the sports centers. The data collected go through frequency analysis, reliability analysis, and exploratory factor analysis with SPSS 16.0, and also AMOS 18.0 is utilized to perform confirmatory factor analysis and hypothesis verification. According to the study result First, service guarantee affects service quality positively while it does not affect customer loyalty. Second, service quality affects service value positively. Third, service value affects customer satisfaction and customer loyalty positively. Therefore this study has verified the marketing effectiveness of service guarantee in sports centers, so it can be said that the study has drawn practical operation methods.

• Journal of Korean Society of Environmental Engineers
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• v.33 no.7
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• pp.501-510
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• 2011

In this study, water pollution sources of 14 major tributaries of Han river and characteristics of water quality for each target streams were evaluated based on water quality data in 2007.1-2009.12 (14 data sets) using a statistical package, SPSS-17.0. Cluster analysis over time and space for each stream resulted in 4 groups for the spatial variations in which type and density of pollution sources in the basins showed the greatest impact on grouping. Moreover, cluster analysis for the time variation in which rainfall, temperature and eutrophication were shown to contribute to the clustering, produced 2 groups, from summer to fall (July-Oct.) and from winter to early summer (Nov.-June). Four factors were found as responsible for the data structure explaining 71-90% of the total variance of the data set depending on the streams and they were organic matter, nutrients, bacterial contamination. Factor analysis showed main factors (water pollutants) changed according to the season with different pattern for each stream. This study demonstrated that water quality of each stream could produce useful outcomes when factor and pollution source of basin were evaluated together.

• Journal of the Korean Society for Marine Environment & Energy
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• v.3 no.4
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• pp.3-22
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• 2000

To know characteristics of water quality in coastal sea around the Keum river estuary in summer, we studied the water quality of surface, middle and bottom level during Jun e～september, 1998. The mean concentrations of COD, DIN, DIP & chlorophyll-a were 1.36mg/L, 28.60㎍-at/L, 0.48㎍-at/L and 4.14㎍/L, respectively, which were over eutrophication criteria in sea water. After the Keum river dyke was constructed, seasonal freshwater discharge was largely changed. About 80% of total annual freshwater discharge was concentrated in summer as rainy season from July to September. The correlation coefficient of DIN versus salinity was shown to be high, and thus the concentration of DIN was closely related to freshwater discharge. Maximum Chlorophyll-a concentration was occurred in September, due to increased DIP concentration, high water temperature and low salinity after heavy rainfall in August. The results of Principal Component Analysis showed that the first factor represented a series of eutrophication factors, the second factor w3s a valiance of seasonal fluctuation, and the third was a variance of progress of mass change.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2003.07a
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• pp.139-142
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• 2003

Microwave dielectric properties of $Ca(Li_{1/4}Nb_{3/4})O_3-CaTiO_3$ ceramic systems were investigated with calcination temperatures and amounts of $CaTiO_3$ in the range of 0.2 to 0.4mol. $Ca(Li_{1/4}Nb_{3/4})O_3$ ceramics having orthorhombic crystal structure could be synthesized at $750^{\circ}C$ and sintered well at $1250^{\circ}C$. They showed the dielectric constant of 26, quality factor($Q{\times}f_o$) of 13,000 and temperature coefficient of resonant frequency(${\tau}_f$) of $-49{\pm}2ppm/^{\circ}C$ With adding the $CaTiO_3$ amount the dielectric constant and ${\tau}_f$ increased due to the solute of $CaTiO_3$ but the quality factor decreased. The 0.7$Ca(Li_{1/4}Nb_{3/4})O_3-0.3CaTiO_3$ ceramic showed the dielectric constant of 44, quality factor($Q{\times}f_o$) of 12,000 and ${\tau}_f$ of $-9{\pm}1ppm/^{\circ}C$.

• The Transactions of the Korean Institute of Electrical Engineers C
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• v.48 no.4
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• pp.232-240
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• 1999

In this study, the $(1-\chi)Ba(Mg_{\fraction one-third}Ta_{\fraction two-thirds}O_3-\chiBa(Co_{\fraction one-third}\Nb_{\fraction two-thirds})O_3$ ceramics($\chi$=0.3,0.4,0.5,0.6) were prepared by the conventional mixed oxide method. The ceramics were sintered at the temperature of $1500~1575^{\circ}C$ for5 hours in air. The BMT-BCN ceramics have a complex perovskite structure, and have peaks of (101), (102), (201), (202) and (212). Increasing the sintering temperature, dielectric constant was increased. Temperature coefficients of resonant frequency of the specimens were decreasing with increasing BCN content. In the case of the 0.7BMT-0.3BCN ceramics sintered at $1575^{\circ}C$ for 5 hours, dielectric constant, quality factor and temperature coefficient of resonant frequency for microwave dielectrics application were a good value of 28, 235500 at ㎓ and -$1.2 ppm/^{\circ}C$, respectively.

• Journal of Electrical Engineering and Technology
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• v.9 no.5
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• pp.1719-1723
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• 2014

In this study, the microwave dielectric properties of nano spheroidization glass powders added $Ba(Zn_{1/3}Ta_{2/3})O_3$ ceramics prepared by solid state reaction have been investigated. Adding $(Ba_{0.4}Ca_{0.6})SiO_3$ nano spheroidization glass powders could effectively promote the densification even in the case of decreasing the sintering temperature. When the glass frit is 0.3 wt% and sintering is carried out at a temperature of $1500^{\circ}C$ for 6 hr, a temperature stable microwave dielectric ceramic could be obtained, which has a dielectric constant (${\varepsilon}_r$) of 30.2, a quality factor ($Q{\times}f_0$) of 124,000 GHz and a temperature coefficient of resonance frequency (${\tau}_f$) of $2ppm/^{\circ}C$.

• Journal of the Korean Society of Food Culture
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• v.27 no.1
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• pp.82-88
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• 2012

In this study, the effects of yacon (Smallanthus sonchifolius) leaf on the quality characteristics of cookies were examined. In order to investigate its effects, four different amounts (0%: Control, Y-0.5, Y-1.0, Y-1.5) of yacon leaf powder were added to the cookie dough. Among the physicochemical and sensory characteristics, the density and pH of the dough, spread factor, color value, firmness, consumer acceptability, and Pearson's correlation coefficients were measured. Although there was no significant difference in pH of the doughs among the groups, density significantly decreased with increasing amount of yacon leaf powder (p<0.05). While the L, a, b values, and hardness decreased significantly, DPPH free radical scavenging activity increased significantly as the content of yacon leaf powder increased (p<0.05). Overall acceptability, appearance, taste, and texture between the control and Y-0.5 groups showed no significant differences. This study suggests the possibility of yacon leaf as an ingredient that increases the functionality of cookies.

• Research in Community and Public Health Nursing
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• v.27 no.3
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• pp.193-201
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• 2016

Purpose: The aim of the study is to determine factors influencing quality of caregiving by caregivers for the elderly with dementia. Methods: Data were collected from 87 caregivers for elders with dementia who had visited in Busan Metropolitan Center for Dementia and D-University hospital outpatient center from July 10 to September 30, 2015. A self-reported questionnaire was used to assess the severity of the elders' dementia and knowledge of dementia, burdens and quality of caregiving by the caregivers. The SPSS 21.0 version program was used for data analysis. Data were analyzed using descriptive statistics, Pearson's correlation, t-test, ANOVA and multiple regression. Results: Significant predictors of quality of caregiving by caregivers included caregivers' burdens (explanation power 25%), knowledge of dementia (explanation power 4%) and levels of education (explanation power 3%). These factors explained 32.3% of the variances in quality of caregiving. Conclusion: Burdens on caregivers were a major factor that decreased quality of caregiving, and knowledge of dementia was a factor that increased it. These findings show that educational programs and intervention for reducing burdens and improving knowledge of dementia are necessary to improve quality of caregiving by caregivers.

• Korean Journal of Adult Nursing
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• v.18 no.2
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• pp.175-182
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• 2006

Purpose: The present study was designed to explore and compare attributes of the quality of life between Korean elderly and Korean-American elderly. Method: The research design was a descriptive design and questionaries were used. Studies were done using questionnaires. Data were collected from convenient sample of 163 Korean elderly and 151 Korean-American elderly recruited from senior centers and churches. Collected data were analyzed by using SPSS/WIN 10.0. Results: There were significant difference between Korean elderly and Korean-American elderly in education and income. Korean-American elderly showed higher selfesteem, self-efficacy, and quality of life than those of Korean elderly. The influencing factors on quality of life in Korean elderly were defined as self-esteem and self-efficacy. And the influencing factor on quality of life in Korean-American elderly was defined as self-efficacy. Conclusion: In conclusion, the results of this study showed that self-efficacy was a very important factor as attribution to the quality of life for both elderly group. Therefore, self-efficacy should be promoted in nursing intervention in order to enhance the quality of life for both Korean and Korean-American elderly.

• Journal of muscle and joint health
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• v.9 no.2
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• pp.166-176
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• 2002

The purpose of this study was done to identify analysis study quality of life in home stayed arthritis patients. The subject for this study were 56 arthritis patients in K city and boundary area resident, and period of data collection was from July, 2000 to November, 2000. The results are as follows. 1. Mean score of Quality of life was $171.13{\pm}44.08$(range from 66 to 244), Mean score of depression was $36.71{\pm}12.11$(range from 18 to 64), score of social support was $3.96{\pm}5.30$(range from 0 to 19), and score of stress was $322.80{\pm}34.18$(26 to 2316). 2. Main demographic factor influenced upon quality of life was age, sex, educational level and marital status, and main Physical factor influenced upon qualify of life was height, systolic and diastolic blood pressure. 3. Quality of life was correlated negatively with depression, and positively social support. 4. quality of life in home arthritic patient was explained 68% by depression, age and social support. In conclusion, nursing intervention of arthritic patient in home considers age, social support and depression in order to promote quality of life.