• Journal of the Korean Institute of Educational Facilities
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• v.20 no.6
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• pp.21-30
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• 2013

This study aimed to identify elementary school teachers' perceptions of various aspects of physical environments of a classroom. For the purpose, a survey questionnaire was administered to 982 classroom teachers(female 82.2%) working at 67 elementary schools(Seoul 55%) located in Seoul and Busan. According to the analyses of the survey data, 50.8% of the respondent teachers suggested 20-25 as an optimum class size. Also, 57% of the teachers were positive about the current size of a classroom($67.5m^2$), but evaluations of a classroom size were divided between the teachers who had more and less than 30 students in class. Furthermore, three factors, labelled as 'uniqueness', 'residential stability' and 'visually pleasing', were extracted from a factor analysis of the Semantic Differential Scale consisting of 24 adjectives evaluating a classroom environment. Teachers from Busan tended to rate higher in the uniqueness domain while female teachers scored higher in the domain of residential stability, respectively, compared to their counterparts. Overall, the teachers perceived their classrooms having no particular characteristics, but rated highly in terms of stability. In addition, it was found out that the teachers' requests for the improvement of a classroom environment were not so much as the increased size of a classroom as a reduced class size as well as educational facilities that are corresponding to a variety of instructional methods. In summary, this study confirmed that elementary school teachers' perceptions of a classroom environment varied according to such factors as sex, teaching career, grade of their concerned class, and class size.

• Korean Journal of Community Nutrition
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• v.22 no.1
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• pp.40-52
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• 2017

Objectives: This study was conducted to examine the length of exposure to smartphone and its association with dietary behavior toward snacks, lifestyle, and nutrition knowledge in elementary school students. Methods: Subjects were 372 5th and 6th grade schoolchildren in Cheongju, Korea, and data was collected by a self-administered questionnaire. They were divided into two groups by the time spent using smartphone: moderate (< 2 hours/day) and overexposure (${\geq}2$ hours/day). Data was analyzed using frequency analysis, ${\chi}^2$-test, and independent t-test as well as analysis of covariance when necessary. Results: Approximately half of subjects (41.4%) reported spending ${\geq}2$ hours/day using smartphone. That habit was more frequent among students in the 6th grade, those who received more monthly allowance, and who has a working mother. 63.4% of the subjects reported that they consumed snacks while watching television, using a computer and/or a smartphone and 48.1% said that they consumed snacks while they use a smartphone. Both situations were most prevalent among those with overexposure to smartphone (${\geq}2$ hours/day). We also observed that a higher percentage of subjects from the overexposure group spent more money on snack foods with the preference for ice cream, fast food, and carbonated drinks. Further, those in the overexposure group consumed more ice cream, cookies, and carbonated drinks. In addition, they had less desirable dietary behavior and health-related lifestyle (sleep duration and frequency of regular exercise) compared to those with moderate smartphone usage (< 2 hours/day). However, there was no statistical difference in nutrition knowledge among children with different degrees of smartphone usage. Conclusions: Our results showed that longer smartphone use was associated with less desirable snack preference/consumption and other dietary behavior in elementary school students. Thus interest and positive attitudes towards healthy snacks and diet should be reinforced in nutrition education programs, especially for those who are prone to use smartphones.

• Journal of Korean society of Dental Hygiene
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• v.13 no.5
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• pp.727-737
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• 2013

Objectives : This study aimed to investigate the levels of emotional labor and occupational stress and their relationships in dental counselors to improve psychological health related with dental counseling. Methods : The questionnaire survey was conducted to 167 dental counselors working at dental clinics in Busan and Gyeongsangnam-do from June to August, 2012. The study used emotional labor questionnaires and Korean Occupational Job Stress Scale (Basic Version, KOSS-43) as an assessment scale. All respondents were asked to complete a self-administered questionnaire. Data analysis was performed with descriptive analysis, t-test, ANOVA, and multiple regression analysis using SAS(ver 9.2). Results : The levels of occupational stress and emotional labor in dental counselors were $47.26{\pm}8.36$ and $3.45{\pm}0.47$. Three subscales of emotional labor as frequency of emotional expression, attention of emotional expression norms and disharmony of emotion were related with occupational stress in dental counselors. The level of job stress was increased by the lower level of emotional expression and increased by the higher levels of emotional expression and disharmony of emotion. Conclusions : In addition to increasing the number of counselors, nurturing counseling workforce is essential to manage the job stress of dental counselors. Sufficient counseling with a patient in a comfortable counseling environment is important to reduce the job stress by emotional labor. Continuous service improvement through positive emotional service education is necessary to be implemented for counselors.

• Journal of Biosystems Engineering
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• v.34 no.2
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• pp.114-119
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• 2009

Field test was conducted to investigate primary factors reducing rapeseed harvesting using a reciprocating cutter-bar of combine. The results showed that the correlation between crop moisture content and yield loss had a U-type, which indicated that the yield reduction increased at too high and too low crop moisture contents. The proper ranges of crop moisture contents were 27${\sim}$35%, 21${\sim}$56%, and 62${\sim}$73% in case of grain, pod and stem, respectively. Crop moisture content was negatively correlated with header loss, but positively correlated with threshing loss. In contrary, stem moisture content showed positive correlations with total loss, threshing loss and separation loss. Working speed was positively correlated with header loss. Total flow rate, pod flow rate and stem flow rate were highly correlated with threshing loss and separation loss. However, grain flow rate did not show any correlation with total loss. According to the principal component analysis, two principal components were derived as components with eigenvalues greater than 1.0. The contribution rates of the first and the second components were 52.7% and 38.9%, which accounted for 91.6% of total variance. As a contributive factor influencing total loss of rapeseed mechanical harvesting, a crop moisture content factor was greater than a crop flow rate factor. The stepwise multiple regression analysis for total loss was conducted using crop moisture content factor, crop flow rate factor and coefficient. However, the model did not show any correlation among independent and dependent factors ($R^2$=0.060).

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.5
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• pp.3257-3267
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• 2015

The purpose of this study was to investigate the effect of Workplace Bullying and Ego-resilience on the Turnover Intention of Nurses in the Public Hospital and presents basic data for helping positive working environment to nurses. A survey was held to Nurses of a Public Hospital in Seoul from November 20 to December 3, 2014. of 236 copies of the questionnaire distributed, a total of 216 copies were in the final analysis. For data analysis, SPSS 21.0 for Window was used. As a result, there were correlations between variables, the Turnover intention of Nurses of the Public Hospital were affected by the Workplace Bullying and Ego-resilience. and the largest effect was the Work-related problem. In conclusion, It is need to development program for preventing Workplace Bullying and Intervention for decreasing Turnover intention of nurses in the Public Hospital.

• Journal of Korean Society of Steel Construction
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• v.19 no.4
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• pp.395-402
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• 2007

Probabilistic risk assessment was conducted on a hybrid cable-stayed bridge consisting of a steel-composite plate girder and a concrete girder with a long span, designed using the working stress design and strength design methods. The component reliabilities of the bridge's cables, pylons, girders, and steel-concrete conjunction were evaluated using the AFOSM(Advanced First Order Second Moment) algorithm and the simulation technique at the critical sections, based on the maximum axial force, shear, and positive and negative moments of the selected sections. For the analysis of system reliability, the hybrid cable-stayed bridge consisting of cables, pylons, and plate girders was modeled into combined failure modes, and for system reliability, the probabilities of failure and reliability index of the structural system were evaluated. Based on the results of this study, the critical failure modes of the hybrid cable-stayed bridge based on the bridge's structural characteristics are suggested, and the efficiency of the partial ETA technique for use in the risk assessment method was confirmed.

• Korean Journal of Veterinary Service
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• v.27 no.4
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• pp.345-354
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• 2004

Two cases of classical swine fever (CSF) disease have broken out in Cheolwon (7 April, 2002). The suspected pig herds were huddled together because of high fever (over $40^{\circ}C$) and showed remarkable decrease of the leukocytes. The staggering gait related to posterior weakness, constipation and lethargy, hyperemia, hemorrhagic lesions (on the skin, muzzle, ears, limbs, tail and inner part of legs) and conjunctivitis with dirty streaks below the eyes were observed. The inflammation in the lung, infarction in the spleen, swelling and hemorrhage in lymph nodes, kidney, intestine, heart and cheese like purulent inflammation of the tonsil were observed. The ulcers of the colon were also detected. Several clinical and laboratory techniques including blood test, histo-pathological examinations, indirect fluorescent antibody (IFA) test and RT-PCR test were applied to diagnose the disease. Inoculation test on PK-15 cell was also performed. The necrosis of the lymphatic cells and infiltration of the vessel circumferential cells in the brain and lymph organs were commonly viewed. The proliferation of the glia cell (gliosis) in the lymph was particular. Cytopathogenic effect (CPE) and specific fluorescent-bright-green areas (with IFA) appeared in PK-15 cells inoculated with suspected blood plasma. The IFA test on the epithelial and mucous membrane cells of tonsil was positive. RT-PCR technique required more working hours and labor than other techniques in this examination but it was useful because of the sensitivity to the CSF viral gene.

• Journal of Society of Preventive Korean Medicine
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• v.16 no.3
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• pp.119-128
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• 2012

Objective : The aim of this study is to investigate the relationship between Yangsaeng and general health status. Methods : In this study, we used data from the combined 2008-2010 Korean National Health and Nutrition Examination Survey(KNHANES). Mental Yangsaeng was measured by stress recognition and depression. Food Yangsaeng was measured by breakfast skipping and mixed grain diet. Life style Yangsaeng was measured by sleeping time and working pattern. Exercise Yangsaeng was measured by walking and exercise. We defined general health status as EQ-5Dindex, EQ-5Dvas, frequency and day of lying in a sickbed in last one month and activity limitation. Results : Mental Yangsaeng, food Yangsaeng, life style Yangsaeng and exercise Yangsaeng have 8 factors. Most of factors significant correlation with EQ-5Dindex, EQ-5Dvas, frequency and day of lying in a sickbed in last one month and activity limitation. Conclusion : Yangsaeng and general health status have positive correlation.

• Journal of Internet Computing and Services
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• v.11 no.1
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• pp.183-193
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• 2010

For the purpose of enhancing performances, many companies have tried to ensure the competitive advantages in ties with organization's strategy by putting effort in designing, developing and practicing the information system. Despite the information oriented small and medium enterprises (SME) being suffered from lack of funds, professional man-power and poor environment, fairly evaluating the level of information system within an organization can be a positive starting point for information oriented SME. Therefore in this study, for the purpose of using the SERVQUAL as a measurement tool provided by information system department under the environment of using information system, we try to free from the marketing oriented service category and develop models that are applicable in the information system environment to check reliability and validity. As a result, it is analyzed that enhancements of SERVQUAL simultaneously improves system and information quality which makes the employees satisfy with their working environments and sequentially affects to the collaborative performance of using information system.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.11
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• pp.4273-4281
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• 2010

The purpose of this study is to investigate the relationships between self-leadership(rehearsal, self-goal setting, self-respect) and empowerment, self-efficacy and innovation. In order to verify the relationships, data obtained from 305 employees working in Seoul were analyzed by using SPSS 18.0 and AMOS 8.0. This study reports findings as follows: First, the relationship between the self-leadership(rehearsal, self-respect) and the empowerment is positively related. Second, there was also a positive correlation between the self -leadership(rehearsal, self-goal setting, self-respect) and the self-efficacy. Third, the empowerment is positively related with innovation, however self-efficacy has no correlation with innovation. Implications of these results for research and practice were discussed.