• Journal of dental hygiene science
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• v.10 no.6
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• pp.431-438
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• 2010

This study was designed to identify the relationship between emotional labor and reaction factor(job satisfaction, fatigue), buffer factor(social support) among dental hygienist. The number of respondents was 50 who work in dental clinic and period of investigation was march 2010 through April 2010. A structured questionnaire was employed to evaluate the level of participants' sociodemographics, job-related factors, health-related behaviors, emotional labor and self-perceived fatigue, job satisfaction, social support. While the mean values of emotional labor were higher than thosewho work in hospital and lower than those who work in service employees. These results suggest that emotional labor was related to an increase in fatigue and strong correlation between involuntary emotional expression, self-perceived fatigue, job satisfaction, social support in dental hygienist. Multiple regression analysis has found that social support and no. of personnel were main factors that influence to the level of emotional labor in dental hygienist. The results of this study suggest that emotional labor was a determinant predictor of self perceived fatigue. Thus, a management program for emotional labor is strongly recommended for promotion of quality of life in dental hygienist and to improve dental service and competitiveness.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.12 no.1
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• pp.71-84
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• 1992

Polymer-Impregnated Concrete(PIC) is a composite material of concrete and polymer. PIC has superior properties compared to conventional cement concrete, such as strength, stiffness, toughness, durability, water-proofing, chemical resistance. However, the usage of PIC has been limited to repairing materials and non-structural applications due to the lack of the design criteria and the analytical model to determine structural behavior. The objective of this study is experimentally to develop the optimum mixing proportions of polymer impregnants and the stress-strain responses, the strength characteristics, the fatigue and creep behaviors, and the durabilities of MMA(methyl methacrylate)-based PIC.

• Journal of the Korean Society of Food Culture
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• v.32 no.1
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• pp.66-74
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• 2017

This study was conducted to investigate the correlation between frequency of high-caffeine energy drink intake in adolescents and their mental health status using data from the Korean adolescent health behaviors online survey (2014-15). Mental health was classified by the five categories: Perception of stress (PS), Insufficient relief of fatigue after sleep (IRFS), Experience of sadness despair (SD), Suicidal ideation (SI), and Subjective unhappiness (SU). Regarding general characteristics, higher age, height, and body weight of subjects were associated with higher frequency of high-caffeine energy drink (HCED) intake (p< .0001). In the OR analysis, when the lowest group (${\leq}2/wk$) and highest group ($1{\geq}day$) were compared, the highest group showed significantly higher OR in all five categories of mental health. According to gender, males did not show better PS, SD, and SI than females who had a high frequency of HCED (p for trend<.0001). According to school level, middle school students showed a higher risk rate than high school students in PS, IRFS, and SD (p for trend< .0001). Based on the above results, higher frequency of HCED intake among adolescents was associated with more adverse effects on mental health.

• Journal of the Korean Society of Safety
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• v.27 no.5
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• pp.88-94
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• 2012

In order to develop high performance concrete that overcome defects of asphalt and latex modified concrete for bridge deck overlay, this study aims to evaluate durability performance of concrete slab for bridge deck overlay. The present study is an exploratory research concerned with evaluation of two types of high performance concrete for bridge deck applications. This study is composed of a set of experiments, including static loading test and fatigue test and compared with data of defection, crack, concrete and steel strain. Also, experimental results were verified with analytical models by ABAQUS program. But overall behaviors of all specimens are comfortable, so those take sufficient load carrying capacity and high stiffness in cyclic load.

• Structural Engineering and Mechanics
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• v.49 no.3
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• pp.285-296
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• 2014

Material damping affects the dynamic behaviors of engineering structures considerably, but up to till now little research is maintained on influence factors of material damping. Based on the damping-stress function of steel, the material damping of steel beams is obtained by calculating the stress distribution of the beams with an analytical method. Some key influence factors of the material damping, such as boundary condition, amplitude and frequency of excitation, load position as well as the cross-sectional dimension of a steel beam are analyzed respectively. The calculated results show that even in elastic scope, material damping does not remain constant but varies with these influence factors. Although boundary condition affects material damping to some extent, such influence can be neglected when the maximum stress amplitude of the beam is less than the fatigue limit of steel. Exciting frequency, load position and cross-section dimension have great effects on the material damping of the beam which maintain the similar changing trend under different boundary conditions respectively.

• Phonetics and Speech Sciences
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• v.5 no.4
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• pp.53-61
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• 2013

Voice disorders are most common in female teachers due to work-related vocal demands; however, only a few studies tried to evaluate individual risk factors with work-related risk factors to diagnose voice disorders. This study evaluated sixty-seven female elementary teachers (36 with voice disorders and 31 without voice disorders) to compare their vocal misuse, overuse, and vocal hygiene behaviors. Total Voice Handicap Index scores and VHI subscale (P, E, F) scores were not significantly different between two groups (p>0.05) and there was no relationship between VHI and acoustic measures (p>0.05). Loud talking, talking in noisy situations, and excessive speaking were significantly more frequent in female teachers with voice disorders (p<0.05) and thereby these overuse and misuse behavioral patterns were identified as risk factors to develop voice disorders in female teachers. Also, hydration was the most common behavior for vocal hygiene when experiencing vocal fatigue; however, hydration with hot green tea or coffee and throat clearing were often misused for vocal hygiene. This study found that female teachers from both groups presented higher voice handicap regardless of voice disorders. This study suggests a multidimensional voice assessment protocol is required to reflect voice problems in teachers and a vocal education program may be important to improve vocal hygiene knowledge and behavioral changes in female teachers.

• International Journal of Internet, Broadcasting and Communication
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• v.15 no.4
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• pp.142-148
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• 2023

In Modern days, Self-driving for modern people is an absolute necessity for transportation and many other reasons. Additionally, after the outbreak of COVID-19, driving by oneself is preferred over other means of transportation for the prevention of infection. However, due to the constant exposure to stressful situations and chronic fatigue one experiences from the work or the traffic to and from it, modern drivers often drive under drowsiness which can lead to serious accidents and fatality. To address this problem, we propose a drowsy driving prevention learning model which detects a driver's state of drowsiness. Furthermore, a method to sound a warning message after drowsiness detection is also presented. This is to use MoveNet to quickly and accurately extract the keypoints of the body of the driver and Dense Neural Network(DNN) to train on real-time driving behaviors, which then immediately warns if an abnormal drowsy posture is detected. With this method, we expect reduction in traffic accident and enhancement in overall traffic safety.

• The Korean Journal of Food And Nutrition
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• v.20 no.4
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• pp.476-486
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• 2007

This study was performed to investigate the dietary behaviors, perceived stress, and health-related factors along with their correlations in University students. The number of subjects was 150(64 males and 86 females), and the results of the study were as follows: Stress was felt by over 80% of the male and female students. The male students were more stressed than the females for economic value, gender difference, professor and drinking-related stress factors, and there was a significant difference between the genders. The female students had more clinical symptoms from stress than the male students in terms of dizziness, indigestion and constipation(p<0.01, p<0.001). The amount of food intake under stress was significantly different by gender. The female students preferred sweet tasting items, whereas the male students preferred hot tasting item when under stress. Also the intake of candy and chocolate when under stress in the male and female students was $2.00{\pm}0.74$ and $2.41{\pm}0.75$, respectively. The female students consumed candy and chocolate more than the male(p<0.01). Furthermore, 62.5% of the male students and 30.2% of the female students exercised to get rid of stress: the use of ball games as exercise in male and female students was $1.59{\pm}0.83$, $1.01{\pm}0.11$, respectively. Many students drank alcohol and smoked while under stress. In particular, the male students smoked more than normal as compared to the females, and there was a significant gender difference(p<0.001). The clinical symptoms positively correlated with the life stress level were degree of nervousness, sweaty, achy neck and shoulders, sore back, dizziness, eye fatigue, headache and indigestion. The amount of food intake under stress was positively correlated to the clinical symptom of headache. These results indicate the effects of life stress on dietary behaviors, food choice, and health status. Stress not only changed dietary behaviors, but was also related to health status. Therefore, education with regard to nutrition is necessary if college students are to practice food eating habits to correctly manage life stresses.

• Journal of the East Asian Society of Dietary Life
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• v.15 no.5
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• pp.516-523
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• 2005

This study was performed to investigate dietary behaviors and consumption of health food in cancer patients. The subjects were 163 cancer patients recruited from the general hospital in Seoul, Korea. The data were obtained by the structured self administered questionnaire. The mean age of subjects was 51 years. Most of subjects didn't eat the visual fat of meat and chicken skin. The mealtime of the subjects was generally regular and most of subjects had breakfast. The subjects of this survey liked to eat foods with sweet taste but disliked to eat hot, salty and sour taste ones. The preference for fish, marine products and vegetables was high but that for instant foods and frying foods was very low. Most of subjects consumed the foods that is generally known as anticancer foods such as vegetables and fruits. On the other hand, most of subjects didn't intake butter, margarine, and frying foods that is known as risk factors of cancer. The majority of subjects$(84.7\%)$ consumed the health food The main reasons for taking health foods by subjects were to cure disease$(58.0\%)$, to prevent disease$(45.3\%)$, to supply nutrients$(39.3\%)$, to maintain the mental state$(12.7\%)$ and to recover fatigue$(10.7\%)$. Majority of subjects$(66.0\%)$ spent money more than 200,000 won/month to buy health foods. The purchasing channels of health foods by subjects were recommendation by family or friend$(64.0\%)$, by physician/pharmacist$(18.0\%)$ and by nutritionist or dietician(6.0), and advertisement through TV or radio$(12.0\%)$. The types of taking health foods of the subjects were vegetable extracted food$(60.0\%)$, mushrooms$(51.3\%)$, Lactobacillus food$(25.3\%)$, enzyme food$(22.6\%)$ calcium containing food$(20.0\%)$ and so on. The results of the current study show that although many cancer patients already practice healthy dietary behaviors, there is a substantial proportion who do not and most of cancer patients consume health foods.' Further intervention is needed to explore the effect of health foods in cancer patients

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.12
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• pp.8525-8534
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• 2015

The purpose of this study was to investigate relations among the Health Promotion Behavior, Physically, Psychological, and Social factors of the stroke patients. The subjects include the patients that were Stroke was diagnosed and being admitted to hospital. The data of total 223 stroke patients were used in analysis. Collected data were analyzed with descriptive statistics, t-test, ANOVA, Pearson correlation, and Structural Equation Analysis. As a result, The higher medical support health promotion behavior scores were higher. Health Promotion Behavior had correlations with the subjective health state(r=.56, p=.000), family support (r=.68, p=.000), medical support(r=.65, p=.000), Fatigue(r=.27, p=.004), and behavioral intentions(r=.75, p=.000). Factors Affecting Health Promotion Behaviors of the Stroke patients Physically factors of(${\beta}$=-.156, p=.014), Psychological factors of subjective health(${\beta}$ =.283, p=.001), behavioral intentions((${\beta}$=.362, p=.000), Social factors such as family support(${\beta}$=.219, p=.010), the medical support(${\beta}$=.246, p=.004) was found to be significant influence factors. In conclusion, health promotion behavior in stroke patients is subjective health, behavioral intentions, a family support. The higher medical support health promoting behavior appears score was found to be highly Psychological factors and social factors are important factors in promoting healthy behavior. Therefore, psychosocial personalized approach to maintaining the stroke health promotion, health promotion action program itdaneunde be used as basis for relapse prevention is significant.