• Journal of Pharmacopuncture
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• v.27 no.3
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• pp.199-210
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• 2024

Objectives: Few studies have examined the impact of healthy sleep among general workers on individuals and society. Therefore, the status and risk factors of sleep disturbances among general workers were investigated. In addition, this study assessed the degree to which cold and heat symptoms are associated with sleep disturbances. Methods: A nationwide cross-sectional study was conducted through an online questionnaire focused on sleep disturbances of the general public in 2021. The degree of cold-heat pattern Identification (CHPI) of the general public was also surveyed. Descriptive statistics and multivariate logistic regression were used to derive the study results. Results: Data from 2,822 workers out of 3,900 valid questionnaires were analyzed. Approximately half of the respondents (49.93%) had sleep disturbances. Among the types of work, self-employed, two-shift work, and working more than 53 hours were associated with sleep disturbances. Sleep disturbances were positively associated with six cold and heat symptoms: three cold symptoms (coldness of the abdomen, coldness of body, and pale face) and three heat symptoms (body feverishness, feverishness of the limbs, and drinking cold water). Conclusion: Customized policies to maintain healthy work are needed for self-employed work, two-shift work, and long working hours, which are risk factors for workers' sleep disturbances. In addition, medical personnel can effectively diagnose and treat sleep disturbances considering the worker's cold and heat symptoms.

• Journal of the Korean Home Economics Association
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• v.47 no.7
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• pp.45-58
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• 2009

The purpose of this study was to investigate the effects of individual variables, mother related variables, and timemanagement ability on self-management of adolescents. In addition, the direct and indirect effects of these variables on self-management were also assessed. The subjects of this study were 496 students who were selected at random from middle schools in Daegu. The questionnaire was used for this survey, consisted of a self-management, a timemanagement, a self-efficacy, an internal locus of control, mother’s home management, and mother’s support scale. Factor analysis, multiple regression analysis and path analysis were employed for data analysis. The major findings of this study were as follows: First, mother’s home management planning ability had the most affect on adolescent time-management ability in terms of planning and implementing, while self-efficacy had the most affect on time-management evaluating ability. Second, adolescent’ time-management planning ability had the most affect on lifestyle and money management, time-management implementing ability on studies management, self-efficacy on health management, and internal locus of control on interpersonal relation management of adolescents. Third, among adolescent self-management, lifestyle management, studies management and money management can be achieved through the mediation of adolescent time management ability. They exhibit indirect influence through adolescent self-efficacy, internal locus of control, mother’s home-management planning ability, and mother’s home-management implementing ability. Furthermore, time-management ability is also influenced through the mediation of health management and interpersonal relation management, but is not indirectly affected by selfefficacy, internal locus of control, time planning ability, and time implementing ability.

• The Korean Journal of Rehabilitation Nursing
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• v.6 no.2
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• pp.192-200
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• 2003

Purpose: This study was done to describe the correlation among the blue color worker's health-promoting behavior, occupational life-satisfaction and self-esteem. Method: The subjects consisted of 190 industrial workers employed in one electronics manufacturing plant in Gumi and were obtained by a convenience sample. Data were collected from October 6th to 17th, 2002 by structured questionnaires. The instruments for this study were Health Promoting Lifestyle Profile(47 items), Occupational Life-satisfaction Scale(20 items) and Self-esteem Scale(10 items). Frequency, percentage, t-test, ANOVA, Duncan test and Pearson's correlation coefficient with SAS program were used to analyze the data. Result: 1) The average item score for the health-promoting behavior was 3.01; the highest score on the subscale was self-actualization(M=3.39) with the lowest being exercise(M=2.37). 2) The average item score for the occupational life-satisfaction was 2.96. 3) The average item score for the self-esteem was 2.83. 4) Health-promoting behavior was significantly different according to educational level and age. 5) Occupational life satisfaction was significantly different according to age and religion. 6) Self-esteem was significantly different according to age. 7) Health-promoting behavior was positively related to occupational life-satisfaction and self-esteem. The occupational life-satisfaction was positively related to self-esteem. Conclusion : It follows from this study that there is a very correlation among the blue color worker's health-promoting behavior, occupational life-satisfaction and self-esteem. Therefore health promoting programs that increase occupational life- satisfaction and self-esteem should be developed to promote a healthy lifestyle of the blue color workers.

• Journal of muscle and joint health
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• v.23 no.1
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• pp.49-60
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• 2016

Purpose: The purpose of this study was to examine the effects of hypertension health school program performed in a public health center located in Y-si. Most interesting were the effects on hypertension-related knowledge, self-efficacy, self-care behavior and physiological parameters for hypertensive patients. Methods: Nonequivalent control group pretest-posttest design was employed. 45 patients with hypertension living in Y-si were assigned into an experimental group (n=23) or a control group (n=22). Experimental group was provided with the 8-weeks hypertension health school program from April 7 to May 20 in 2014. Data were analyzed with SPSS/WIN 21.0 using descriptive statistics, $x^2$-test, Fisher's exact test and t-test. Results: The result indicated a significant difference between the experimental group and control group in the scores of hypertension-related knowledge (t=-10.97, p<.001), self-efficacy (t=-4.56, p<.001), self-care behavior (t=-407, p<.001), physiological parameters including systolic blood pressure (t=2.18, p=.032) and diastolic blood pressure (t=2.74, p=.008) and cholesterol levels (t=5.04, p<.001). Conclusion: The conclusion of this study is that the hypertension self-help group program has a significant effect on the change of hypertension-related knowledge, self-efficacy and self-care behavior for hypertensive patients.

• Structural Engineering and Mechanics
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• v.87 no.2
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• pp.151-164
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• 2023

The latest earthquake's costly repairs and economic disruption were brought on by excessive residual drift. Self-centering systems are one of the most efficient ways in the current generation of seismic resistance system to get rid of and reduce residual drift. The mechanics and behavior of the self-centering system in response to seismic forces were impacted by a number of important factors. The amount of post-tensioning (PT) force, which is often employed for the standing posture after an earthquake, is the first important component. The energy dissipater element is another one that has a significant impact on how the self-centering system behaves. Using the damper as a replaceable and affordable tool and fuse in self-centering frames has been recommended to boost energy absorption and dampening of structural systems during earthquakes. In this research, the self-centering steel moment frame connections are equipped with cushion flexural dampers (CFDs) as an energy dissipator system to increase energy absorption, post-yielding stiffness, and ease replacement after an earthquake. Also, it has been carefully considered how to reduce permanent deformations in the self-centering steel moment frames exposed to seismic loads while maintaining adequate stiffness, strength, and ductility. After confirming the FE model's findings with an earlier experimental PT connection, the behavior of the self-centering connection using CFD has been surveyed in this study. The FE modeling takes into account strands preloading as well as geometric and material nonlinearities. In addition to contact and sliding phenomena, gap opening and closing actions are included in the models. According to the findings, self-centering moment-resisting frames (SF-MRF) combined with CFD enhance post-yielding stiffness and energy absorption with the least amount of permeant deformation in a certain CFD thickness. The obtained findings demonstrate that the effective energy dissipation ratio (β), is increased to 0.25% while also lowering the residual drift to less than 0.5%. Also, this enhancement in the self-centering connection with CFD's seismic performance was attained with a respectable moment capacity to beam plastic moment capacity ratio.

• The Journal of Information Systems
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• v.5
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• pp.345-371
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• 1996

Previous studies on user training have largely focused on assessing models which describe the determinants of information technology usage or examined the effects of training on user satisfaction, productivity, performance, and so on. Scant research efforts have been made, however, to examine those effects of training by using theoretical models. This study presented a conceptual models to predict intention to use information technology and conducted an experiment to understand how training for computer skill acquisition affects primary variables of the model. The data were obtained from 32 student subjects of an experimental group and 31 students of a control group, and the information technology employed for this study was a university electronic mail system. The study results revealed that attitude toward usage and perceived behavioral control helped to predict user intentions ;; outcome expectations were positively related to attitude toward usage ; and self-efficacy was positively related to perceived behavioral control. The hands-on training for the experimental group led to increases in perceived ease of use, self-efficacy and perceived behavioral control. The changes in those variables suggest more causal effects of user training than other survey studies.

• 유체기계공업학회:학술대회논문집
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• 2002.12a
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• pp.307-313
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• 2002

In the paper, the prototype development of a 75kW class microturbine for the distributed generation market is partly presented which has continued with the government funding. In the introduction, an overview of the development of microturbines in the world is presented. A series of development procedures are shown with design, manufacture and self-sustaining tests. During the first year, aerodynamic and structural design/analysis, mechanical design are performed for the compressor, the turbine and the combustor. A premixed lean burn combustor technology is used fur the low emission requirements. Foil air bearings and high-speed motors are employed for higher reliability. The self-sustaining conditions have been successfully achieved with the prototype manufactured engine as a preceding operation.

• Journal of Information Technology Services
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• v.19 no.1
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• pp.159-172
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• 2020

The purpose of this study is to examine the structural relationship among factors affecting learning engagement, satisfaction, continuance intention in China-MOOC. For this study, data were collected from 334 students who were taking MOOC classes. and structural equation model ling analyses were employed to examine the causal relationships among variables. From the results of this study, First, self-regulated learning and interaction significantly affected learning engagement. Second, interaction had direct effects on satisfaction. Third, satisfaction significantly affect continuance intention. Furthermore, satisfaction mediated relationships between interaction and continuance intention. These results imply that self-regulated learning, interaction, learning engagement should be considered for designing and implementing China-MOOC learning. Further implication are discussed in the study.

• Journal of the Korea Institute of Building Construction
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• v.12 no.6
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• pp.664-673
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• 2012

Determining the layout of temporary facilities that support construction activities at a site is an important planning activity, as layout can significantly affect cost, quality of work, safety, and other aspects of the project. The construction site layout problem involves difficult combinatorial optimization. Recently, various artificial intelligence(AI)-based algorithms have been applied to solving many complex optimization problems, including neural networks(NN), genetic algorithms(GA), and swarm intelligence(SI) which relates to the collective behavior of social systems such as honey bees and birds. This study proposes a site facility layout optimization algorithm based on self-organizing maps(SOM). Computational experiments are carried out to justify the efficiency of the proposed method and compare it with particle swarm optimization(PSO). The results show that the proposed algorithm can be efficiently employed to solve the problem of site layout.

• Journal of Korean Academy of Nursing
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• v.38 no.4
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• pp.513-521
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• 2008

Purpose: The purpose of this study was to develop an integrated suicide violence prevention program for adolescents. Another purpose was to evaluate the effects of the integrated suicide violence prevention program on self-esteem, parent-child communication, aggression, and suicidal ideation in adolescents. Methods: The study employed a quasi -experimental design. Participants for the study were high school students, 24 in the experimental group and 25 in the control group. Data was analyzed by using the SPSS/WIN. 11.5 program with $X^2$ test, t-test, and 2-way ANOVA. Results: Participants in the integrated suicide violence prevention program reported increased self-esteem scores, which was significantly different from those in the control group. Participants in the integrated suicide violence prevention program reported decreased aggression and suicidal ideation scores, which was significantly different from those in the control group. Conclusion: The integrated suicide violence prevention program was effective in improving self-esteem and decreasing aggression and suicidal ideation for adolescents. Therefore, this approach is recommended as the integrated suicide violence prevention strategy for adolescents.