• 한국주거학회:학술대회논문집
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• 한국주거학회 2006년도 추계학술발표대회 논문집
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• pp.322-327
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• 2006

In our previous research, office workers are relatively frequent in self-reported symptoms suggestive of MCS/IEI compare to construction worker who highly exposed to VOCs compounds. However in that research, the subjects were too small to say it clearly. Based on that research results, self reported symptom surveys to 110 office workers and personal exposure concentration measurement were conducted to 13 of people. VOCs exposure levels were measured within office, house and other places during a week by Passive Sampling Method. In this study, it was found that the number of office workers who met the operational criteria of MCS/IEI was 23.6% similar to 24.5% of previous result, and average of TVOC concentration was appeared high state by order of office, house, and personal exposure.

• 한국소음진동공학회논문집
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• 제19권5호
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• pp.523-529
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• 2009

Smart sensor is known as intelligent sensor, it is different with other conventional sensors in the case of intelligent system embedded on it. Smart sensor has many benefits e.g. low-cost in usage, self-decision and self-diagnosis abilities. This sensor consists of perception element(sensing element), signal processing and technology of communication. In this work, a bridge and structure of smart sensor has been investigated to be capable to condition monitoring routine. This investigation involves low power consumption, software programming, fast data acquisition ability, and authoritativeness warranty. Moreover, this work also develops smart sensor to be capable to perform high sampling rate, high resolution of ADC, high memory capacity, and good communication for data transfer. The result shows that the developed smart sensor is promising to be applied to various industrial fields.

• 한국보건간호학회지
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• 제27권1호
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• pp.76-88
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• 2013

Purpose: The purpose of this study was to identify the degree of sleep quality and its associated factors in adults. Methods: The data was collected from 986 adults aged 19 to 64 by convenience sampling. Subjects completed a questionnaire composed of Pittsburgh Sleep Quality Index (PSQI), Beck Depression Inventory, and other questions that self-rated health and sociodemographic variables. Statistical methods used included descriptive statistics, simple logistic regression, and multiple logistic regression analyses. Results: The global PSQI score was 5.7. About 45% of the subjects were poor sleepers (global PSQI score >5). Multiple logistic regression analyses showed that factors significantly associated with sleep quality were depression and poor self-rated health in young and middle-aged adults. Depression was the most significant associated factor. The presence of a spouse was also associated with sleep quality in young adults. Conclusion: These findings suggest that people with poor sleep quality should have their health carefully screened for depression. In addition, we recommend the development of a nursing program for improving sleep quality.

• 대한가정학회지
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• 제25권4호
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• pp.85-97
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• 1987

The purpose of this study was to establish the hierarchy of housing values. Housing values were hygienic, safety, convenience of near environment, social affiliation oriented, self-actualization, aesthetic, and prestige. A final instrument was developed through two stage pilot surveys. The respondents were 1292 homemakers of middle and high economic class in Seoul and Daejeon, selected through stratified randon sampling technique. Data were collected during March and April 1986, and analyzed using SPSS and SAS computer packages. The statistics used were frequency, percentage, Guttman's reproducibility coefficient. The major finding were as follows; The hierachy of housing values was established with Guttman's coefficient of reproducibility. 94. Those were hygienic value, safety value, convenience of near environment value, aesthetic value, social affiliation oriented value, self-actualization value, prestige value in order.

• 대한간호학회지
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• 제41권5호
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• pp.603-612
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• 2011

Purpose: The purpose of this study was to describe the experience process of adolescents with hematologic malignancies. The question for the study was "What is the experience of adolescents with hematologic malignancies like?" Methods: The grounded theory methodology was used for this study. The data were collected through in-depth interview from 10 adolescents with hematologic malignancies. Data collection was done from January to June 2007. Theoretical sampling was used until the data reached saturation. Results: As a result of the analysis, "Reconstructing self-image from deviated and suspended life" was identified as the core category. And 11 subcategories were identified and they were integrated to the core category. 'Establishment of expanded and matured self' was identified as the consequence. Conclusion: The results of the study provide a frame for effective individualized nursing intervention strategies in helping adjustment of the adolescents with hematologic malignancies.

• 한국학교ㆍ지역보건교육학회지
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• 제11권2호
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• pp.71-87
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• 2010

Objectives: The purpose of this study was to find out the prevalence of constipation, related factors of constipation of female high school students. Methods: The study subjects were 322 students of Y high schools located in a Suwon city, who were selected by the accidental sampling from November 2009. We analyzed the data by frequency analysis, Chi-square test, Logistic regression analysis using SPSS ver.12.0. Results: The results of this study were summarized as follows: A prevalence rate of self-reported constipation was 55.3%. From the Logistic analysis by self-reported method, leading causes of constipation on the students were drinking beverage, the less frequency of having meals, irregular time of having meals, not eating breakfast, insufficient exercise and not evacuating the bowels regularly. Conclusions: Based on these results, intervention to increase the amount of beverage constipation, intake of vegetable, regularity of taking meals, stress management should be provided to prevent the constipation.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2001년도 춘계학술대회논문집B
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• pp.105-109
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• 2001

This paper discuss the real-time self-tuning learning control based on evolutionary computation, which proves its the superiority in the finding of the optimal solution at the off-line learning method. The individuals are reduced in order to learn the evolutionary strategy in real-time, and new method that guarantee the convergence of evolutionary mutations are proposed. It possible to control the control object varied as time changes. As the state value of the control object is generated, applied evolutionary strategy each sampling time because the learning process of an estimation, selection, mutation in real-time. These algorithms can be applied, the people who do not have knowledge about the technical tuning of dynamic systems could design the controller or problems in which the characteristics of the system dynamics are slightly varied as time changes.

• 대한기계학회논문집A
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• 제27권9호
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• pp.1463-1468
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• 2003

This paper presented the real-time self-tuning learning control based on evolutionary computation, which proves its superiority in finding of the optimal solution at the off-line learning method. The individuals of the populations are reduced in order to learn the evolutionary strategy in real-time, and new method that guarantee the convergence of evolutionary mutations is proposed. It is possible to control the control object slightly varied as time changes. As the state value of the control object is generated, evolutionary strategy is applied each sampling time because the learning process of an estimation, selection, mutation is done in real-time. These algorithms can be applied; the people who do not have knowledge about the technical tuning of dynamic systems could design the controller or problems in which the characteristics of the system dynamics are slightly varied as time changes.

• 가정과삶의질연구
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• 제15권4호
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• pp.149-164
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• 1997

This research examined the relationships of individual and intergenerational variables with psychological well-being(PWB) of elderly females and the relative significance of the effect of these variables on PWB. Structured interview technique was used to collect data from 202 elderly females in Seoul who were recruited through quota sampling method. Two-way analysis of variance result indicated that interaction effect between aged and the presence of spouse on PWB was existed. Though most variables were significantly correlated with PWB of elderly females results of multiple regression analyses indicated that three variables-self-efficacy self-esteem affectional solidarity with adult children- significantly influenced PWB and three variabels-coresiding with the first son's family satisfaction with pocket money and contact solidarity-approached the significance level to the effect on PWB.

• 대한전기학회논문지
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• 제34권7호
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• pp.257-266
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• 1985

A new method for the artificial beta cell which can be used to control the hyperglycemia in diabetic patients was represented. The relationship between the insulin infusion rate and the blood glucose concentration was described by the second order ARMA model, and the time varying parameters were identified by exponentially weighted least squares estimator. The design of controller was based on the pole assignment self tuning altorithm with discrete blood sampling and the constraints of input and output responsse rate were considered. The results of animal experiments show that this method may be a fruitful approach for regulating the blood glucose level. We expect that this device can be used as both therapeutic and research tools providing that its stability and reliability are improved a little more.