• Journal of Families and Better Life
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• v.8 no.1
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• pp.129-142
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• 1990

The purpose of this study were to investigate : 1) Differences of perceived time pressure according to the employment status of housewife. 2) The differences of housework strategy according to the employment status of housewife. 3) The relation between perceived time pressure and housework performance strategy. The subject of this study were 375 women living in Seoul, the age of youngest child is at least school age. They were composed of non employed housewives, employed professional housewives and employed non professional housewives. Survery methods were questionare and interview. Data analysis strategy were percentile, frequency, one-way ANOVA, scheffe test and MCA. The major findings were : 1) Perceived time pressure and two sub areas, psychological time pressure and time pressure according to the part of housework were significantly different according to the employment status of housewife. The independent influence of employment status of housewives was most po erful in regression analysis. 2) Housework performance strategy was different according to the employment status of housewife. The strategies were divisions of housework amon family members, use of convenience goods, services, appliance, paid help, adjustment of housework performance standard, reduction of leisure and sleep time.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.22 no.1
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• pp.178-187
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• 2021

This study is a descriptive correlation study to identify the factors affecting life satisfaction for shift service workers and is a secondary data analysis study using the raw data from the Fifth Korean Work Environment Survey. Five hundred and seventy-seven study subjects were selected from 20-year-old wage workers who had more than one year of work experience at the time of the survey and had worked more than 40 hours a week. The analysis used SPSS 23.0 WIN, including a t-test, one-way ANOVA by Scheffe test, Pearson's correlation oefficients, and Hierarchical multiple regression analysis. Regarding the general characteristics of the subjects, there was a difference in life satisfaction according to age, educational level, industrial type, and subjective health status. The higher the work-life balance and work satisfaction of the shift service worker, the higher the life satisfaction. In addition, social support had a moderating effect on the relationship between work-life balance and work satisfaction of shift service workers. Active social support, work satisfaction, and work-life balance improvement promotion programs were developed and applied to shift work service workers considering the factors influencing life satisfaction, thereby improving the life satisfaction of work shift service workers.

• Journal of Families and Better Life
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• v.21 no.4
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• pp.1-10
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• 2003

This paper compares the time perspective between Korean and American college students and examines the difference of it according to gender and social status of them. The subject of this study were 385 Korean students and 385 American counterparts. The data were collected by survey with questionnaires and analyzed by SPSS program for the frequency, percentile, mean, standard deviation, t-test, one-way ANOVA and Duncan test. The results indicate that American students have more long-term personal direction than Korean counterparts and the effects of gender and social status are different in Korea and America. Korean students showed no difference according to these two variables but female America students indicate more long-term personal direction than male students and the time perspectives were different according to social status in America.

• Journal of Korean Institute of Industrial Engineers
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• v.15 no.1
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• pp.51-63
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• 1989

This paper considers software release problems based on Goel-Okumoto and S-shaped reliability growth models. Test of the software system is terminated after a preassigned time T, and it is released to the operational phase. It is assumed that correction cost of an error is increasing with test or operation time. Optimum software release time is obtained using total expected cost on the software life time as a criterion for optimization. In addition, optimal software release policies under the constraint of a software reliability requirement are discussed.

• Advances in Traditional Medicine
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• v.7 no.1
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• pp.34-40
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• 2007

The present study was carried out to elucidate the potential of Muntingia (M.) calabura leaves chloroform extract (MCCE) as antinociceptive, anti-inflammatory and antipyretic agents using various animal models. The dried powdered leaves of M. calabura (20 g) were soaked in chloroform for 72 h and the supernatant obtained was then evaporated to dryness. The crude dried extract (0.912 g), dissolved in dimethyl sulfoxide (1:20; w/v) and considered as a stock solution (100% concentration/strength), was then diluted to the concentrations of 10 and 50% and used together in all experimental models. The MCCE was found to show significant (P < 0.05) antinociceptive and antipyretic activities, but less remarkable anti-inflammatory activity. Only the antinociceptive activity of MCCE measured using the abdominal constriction test and in the first phase of the formalin test occurred in a concentration-dependent manner. The anti-inflammatory activity of 50 and 100% concentrations MCCE was observed only at the range of time interval of 60 - 120 and 60 min, respectively. Based on the results, we conclude that the M. calabura leaves chloroform extract possessed remarkable antinociceptive and antipyretic, but less effective anti-inflammatory, activities and thus justifies the Peruvian folklore claims of its medicinal values.

• Journal of Korean Society for Quality Management
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• v.36 no.1
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• pp.1-6
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• 2008

The purpose of stability study of pharmaceutical products is to establish the shelf life based on the change of the quality with time. Stability study generally consists of a random sample of dosage units from a batch or several batches placed in a storage room and periodically assayed for their drug content. The statistical methods of assessing the shelf-life of drug in the market is considered with the current KFDA regulations. An illustrated application to some stability data from the pharmaceutical industry is also presented with the discussion.

• Journal of Korean Academy of Nursing
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• v.24 no.3
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• pp.499-510
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• 1994

The purpose of this study was to Identify the self-actualization level of Junior College Nursing Students and to analyze the variables that may be related to self-actualization. A convenient sample of 346 students were selected from three colleges located in Seoul and Kyungki-Province. The data were collected using a direct survey method from September17to October 2, 1992. The instrument used for this study was the self-actualization test modified by Kim & Lee(1983). The collected data were analyzed using percentages, means, 1-test, X$^2$-test, ANOVA and Pearson’s correlation coefficient, with the SPSSPC$^{+}$ Package. The results of this study are as follows : 1) The self-actualization level of subjects was moderate. The subjects showed higher scores in the areas of Self actualizing Values and Nature of Man than the standardized normal groups. The subjects showed lower scores in the areas of Inner Directed Existentiality, Self acceptance and Capacity for Intimate Contact. 2) The subjects attending day junior colleges showed higher scores in the areas of Time competent, Existentiality and Self Acceptance than those attending college in the evening. The subjects attending evening junior colleges showed higher scores in the areas of Spontaneity than those attending college by day. 3) The junior students showed higher scores in the areas of Feel-ing Reactivity than freshman. The students with no religion showed higher scores in the areas of existentiality than those who had a religion. The group who had the experience of failure on the college entrance examination showed lower scores in the areas of Nature of Man than those without this experience. Those who chose their major voluntary showed scores higher in the areas of I nor Directed, Self Actualizing Values, Spontaneity and Self regard than the unsatisfied group. The group satisfied with college life showed higher scores in the areas of Time Competent, Inner Directed, Self Actualizing Values and Self Regard than the unsatisfied group. In conclusion self actualization level depends on motivation of choice, satisfaction with nursing as a major and satisfaction with college life. Therefore, and effective guidance program is required to improve motivation and satisfaction with nursing as a major and with college life.

• Natural Product Sciences
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• v.15 no.3
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• pp.115-120
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• 2009

Woohwangcheongsimwon (WHCSW) is a traditional oriental medicinal fomula which has been clinically used for treating strokes, palpitation, loss of consciousness and anxiety. The purpose of this study was to characterize the putative anxiolytic properties of WHCSW using an elevated plus-maze (EPM) and hole-board test. Control mice were orally treated with an equal volume of vehicle (10% Tween 80 solution), and positive control mice were treated with diazepam (1 mg/kg, i.p.). In the EPM test, WHCSW significantly increased the percentage of time-spent in the open arms (200 mg/kg, P < 0.05) and the percentage of open arm entries (200 and 400 mg/kg, P < 0.05). WHCSW also significantly increased the number of head-dips in the hole-board test (200 mg/kg, P < 0.05). In addition, the anxiolytic properties of WHCSW examined in the EPM test were inhibited by flumazenil (10 mg/kg, i.p.), a GABA$_A$ antagonist. However, no changes in spontaneous locomotor activity or myorelaxant effects were observed versus 10% Tween 80 controls. These results suggested that WHCSW is an effective anxiolytic agent, and that its anxiolytic effects are mediated via GABA$_A$ receptors.

• Transactions of the Korean Society of Automotive Engineers
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• v.19 no.3
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• pp.1-8
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• 2011

Stainless steel sheets are widely used as the structure material for the railroad cars and the commercial vehicles. These kinds structures used stainless steel sheets are commonly fabricated by using the gas welding. Gas welding is very important and useful technology in fabrication of an railroad car and vehicles structure. However fatigue strength of the gas welded joints is considerably lower than parent metal due to stress concentration at the weldment, fatigue strength evaluation of gas welded joints are very important to evaluate the reliability and durability of railroad cars and to establish a criterion of long life fatigue design. In this paper, ${\Delta}-N_f$ curve were obtained by fatigue tests. Using these results, the accelerated life test (ALT) is conducted. From the experimental results, an acceleration model is derived and acceleration factors are estimated. So it is intended to obtain the useful information for the fatigue lifetime of plug and ring gas welded joints and data analysis by statistical reliability method, to save time and cost, and to develop optimum accelerated life prediction plans.

• Journal of the Korean Data and Information Science Society
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• v.13 no.2
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• pp.243-250
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• 2002

This paper considers the problem of estimating parameters of the bivariate exponential distribution with a location parameter for a two-component shared parallel system using component data from system-level life test terminated at the time of the prespecified number of system failure. In the system-level life testing, there are three patterns of failure types ; 1) both component failed 2) both component censored 3) one is failed and the other is censored. In the third case, we assume that the failure time might be known or unknown. The maximum likelihood estimators are obtained for the case of known/unknown failure time when the other component is censored.