• Journal of the Korean Society of School Health
• /
• v.16 no.2
• /
• pp.85-95
• /
• 2003

This paper surveys and researches primary school students' situation of their school life. The purpose of this paper is to propose the basic information of the accident prevention teaching and the safety management in order to avoid accidents to occur beforehand. We selected m primary students out of the six primary schools in Taebaek City at which the nursing students of Kangwon Tourism College practiced school health. We used SPSS Win for analyzing data. We carne up with the general characteristics and percentage using frequency analysis, mean and standard deviation of each item, the mean difference using T-Test, and the different factors using one-way analysis. The results are as follows: 1. The 6th grade students don't practice safety procedures than the 5th grade students during outside the school. The older the student is, the less it practices safety procedures. 2. Boys practice safety procedures better than the girls during inside and outside the school. 3. Hot -tempered students don't practice safety procedures properly. 4. Most of the students who often use the health room of the school have high scores in safety procedures test and as a result, these students practice safety procedures thoroughly. 5. The grade of safety living activity is the highest during gymnastic class. Next is when the students use the stairs when they are going up and clown. Then, the use of science room In the playground is the lowest grade of safety for living activity.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
• /
• 2001.05a
• /
• pp.1111-1116
• /
• 2001

A transient T-F(time-frequency) signal processing technique is applied to a tilt drop and a linear shock test rigs for identification of shock characteristics of hard disk drive (HDD). The T-F technique essentially tracks the shock characteristics of pivot point response as well as head slap and lift-off phenomena. From the T-F analysis result, the shock characteristic in HDD is modeled by the two degree of freedom coupled-dynamic system, which consists of actuator arm and suspension. As shock designing tool, the maximax shock response spectrum is employed for prediction of shock performance. Finally, the shock control technique is tested with newly designed actuator arm and suspension. Experimental head slap test result shows that the shock performance is much higher with the new shockproof designed model than the current model

• Journal of Korean Academy of Nursing Administration
• /
• v.12 no.2
• /
• pp.295-304
• /
• 2006

Purpose: The purpose of this study was to investigate the organizational citizenship behaviors(OCB) of nurses through identifying the relationship between the personal characteristics, occupational characteristics and OCB in nursing organization. Method: The subjects of this study were 223 clinical nurses. The structured questionnaires were used to collect the data. The data were analyzed using descriptive analysis, t-test, one-way ANOVA, Scheffe' test, Pearson correlation and stepwise multiple regression analysis by SPSS version 10. Results: The mean of OCB was $5.21{\pm}.59$. The OCB had statistically significant differences according to age(F=1.706, p=.007), tenure duration (F=3.450, p=.009), choice of nursing department(t=1.651, p=.000), marriage(t=2.341, p=.020) and religion(F=2.578, p=.038). The OCB was positively correlated with high-level need(r=.303, p=.000), neuroticism(r=.155, p=.020), task interdependence(r=.433, p=.000), age(r=.172, p=.010) and tenure duration(r=.190, p=.004); negatively with cynicism (r=-.310, p=.000). The task interdependence(18.7%), cynicism(7.7%) and tenure duration(1.9%) explained 28.3% of the variance for OCB in nursing organization. Conclusion: It is necessary to enhance the task interdependence, increase tenure and understand the characteristics of nurses to increase the OCB in clinical nurses. Nurse manager should be understand the positive influence of OCB on the task outputs in the hospital.

• Corrosion Science and Technology
• /
• v.20 no.6
• /
• pp.347-360
• /
• 2021

Currently, the demand for eco-friendly energy sources is high, which has prompted research on polymer electrolyte membrane fuel cells. Both aluminum alloys and nickel alloys, which are commonly considered as materials of bipolar plates in fuel cells, oxide layers formed on the metal surface have excellent corrosion resistance. In this research, the electrochemical characteristics of 6061-T6 aluminum alloy and Inconel 600 were investigated with chloride concentrations in an acid environment that simulated the cathode condition of the PEMFC. After potentiodynamic polarization experiments, Tafel analysis and surface analysis were performed. Inconel 600 presented remarkably good corrosion resistance under all test conditions. The corrosion current density of 6061-T6 aluminum alloy was significantly higher than that of Inconel 600 under all test conditions. Also, 6061-T6 aluminum alloy and Inconel 600 presented uniform corrosion and intergranular corrosion, respectively. The Ni, Cr, and Fe, which are the main chemical compositions of Inconel 600, are higher than Al in the electromotive force series. And a double oxide film of NiO-Cr₂O₃, which is more stable than Al₂O₃, is formed. Thus, the corrosion resistance of Inconel 600 is better.

• The Journal of Korean Society for School & Community Health Education
• /
• v.24 no.4
• /
• pp.1-11
• /
• 2023

Objectives: This study aims to identify influencing factors of disaster nursing competency among school health teachers. Methods: Data were collected from 110 school health teachers at the offfice of education in G province using a convenience sampling method. Data were analyzed by descriptive statistics, t-test, ANOVA, Scheffe test, Pearson's correlation coefficients, and multiple regression analysis. Results: There was a significant difference in disaster nursing competency according to the general characteristics of the subjects in terms of clinical nurse work experience (t=3.40, p=.001) and disaster education experience (t=2.80, p=.006). Disaster perception and disaster nursing competency showed a significant positive correlation (r=.43, p<.001). In final analysis, disaster perception (𝛽=.35, p<.001), career as a nurse (𝛽=.23, p=.009), experience in disaster education (𝛽=.17, p=.048) was found to have a significant effect on disaster nursing competency. Conclusions: Based on the results of this study, disaster perception should be raised to improve the disaster nursing competency of school health teachers. Speicalized disaster nursing & health education based on their experience before appointing school health teachers and disaster response simulation training tailored to school field conditions should be regularly conducted.

• International Journal of Highway Engineering
• /
• v.17 no.1
• /
• pp.51-58
• /
• 2015

PURPOSES : The objective of this study is to compare the densities of asphalt pavements measured both in the field and in the laboratory, and also to evaluate the applicability of field density measuring equipment, such as the pavement quality indicator (PQI), by using statistical analysis. METHODS : For the statistical analysis of the density measured from asphalt pavement, student t-tests and a coefficient of correlation are investigated. In order to compare the measured densities, two test sections are prepared, with a base layer and an intermediate layer constructed. Each test section consists of 9 smaller sections. During construction, the field densities are measured for both layers (base and intermediate) in each section. Core samples are extracted from similar regions in each section, and moved to the laboratory for density measurements. All the measured densities from both the field and laboratory observations are analyzed using the selected statistical analysis methods. RESULTS AND CONCLUSION : Based on an analysis of measured densities, analysis using a correlation coefficient is found to be more accurate than analysis using a student t-test. The correlation coefficient (R) between the field density and the core density is found to be very low with a confidence interval less than 0.5. This may be the result of inappropriate calibration of the measuring equipment. Additionally, the correlation coefficient for the base layer is higher than for the intermediate layer. Finally, we observe that prior to using the density measuring equipment in the field, a calibration process should be performed to ensure the reliability of measured field densities.

• Journal of The Korean Society of Integrative Medicine
• /
• v.9 no.4
• /
• pp.105-117
• /
• 2021

Purpose : This study examined the effect of transcranial direct current stimulation (tDCS) combined high intensity interval training (HIIT) on the aerobic exercise capacity of college soccer players. Methods : The subjects of this study were 30 college soccer players. They were divided into a high intensity interval training group combining transcranial direct current stimulation (Group I) and a high intensity interval training group (Group II). Each group had 15 subjects randomly assigned. After receiving general soccer training, each group additionally received high intensity interval training combined with transcranial direct current stimulation and high intensity interval training for 30 minutes 5 times a week for 8 weeks. Their VO₂max and 20 meter shuttle run test, Yo-Yo intermittent recovery test were analyzed before the intervention. After 8 weeks of intervention, the above items were re-measured and an intergroup analysis was performed. Results : As a result of comparative analysis of VO₂max intake between groups, 20 meter shuttle run test and Yo-Yo intermittent recovery test, a statistically significant difference was found. The high intensity interval training group (Group I) combined with transcranial direct current stimulation showed a significant difference in aerobic exercise capacity compared to the high intensity interval training group (Group II). Conclusion : These results showed that high intensity interval training group combined with transcranial direct current stimulation was more effective for aerobic exercise. Based on this study, this study proposes an effective program for patients as well as elite athletes. In the future, it is necessary to develop an effective transcranial direct current stimulation program and to study how to apply it for various patients.

• Journal of Ocean Engineering and Technology
• /
• v.13 no.3 s.33
• /
• pp.68-76
• /
• 1999

The welding residual stresses produced by the welding frequently caused a crack and promote stress corrosion etc. in HAZ(heat affected zone) contained with external load and weakness of material. Therefore, PWHT(post welding heat treatment) is widely used to reduce wekdubg residuss, to relax hardening of heat affected zone and to get rid of impurity. In this study, in order to define the effect on shappes of T-welded joint, during the post welding heat treatment, we have carried out numerical analyses on the several test pieces by using computer program which was based on thermal-elasto-plato-plasto-creep theories for the study. The main results obtained form this study is as follows: 1) The mechanical difference for change the thickness of plate and groove angle did not appear. 2) The distribution modes of welding residual stresses are same on the all test specimens during the post welding heat treatment. 3) In a mecharical point of view, minimum groove groove angle($40^{circ}$) is more suitable than maximum groove angle($60^{circ}$). 4) Therefore, it is appropriate to minimize the size of groove shape in strength and safety.

• Journal of Oriental Medical Thermology
• /
• v.2 no.1
• /
• pp.49-55
• /
• 2003

In Oriental medicine, Ginseng had been used for many diseases widely. It's main effects are suppling Qi and Promoting metastasis. The objective of this study is to examine the effect of Ginseng on control of body temperature. We conducted this study with 24 volunteers who had no problem in their health from November 2002 to January 2003. The body temperature were measured by DITI and thermometer before taking Ginseng and after 30minutes of the taking Ginseng extract 15g. We observed the difference of temperature among face chest and upper abdomen. All data were coded for computer analysis and significance were tested by Paired t-test and independent-t-test. According to our study, the axillary temperature show no signifiant change between two groups. The difference of temperature$({\Delta}T)$ between face and upper abdomen significantly increase after taking Ginseng extract(p<0.01). The difference of temperature$({\Delta}T)$ between face and chest significantly increase after taking Ginseng extract(p<0.05).

• The Korean Journal of Rehabilitation Nursing
• /
• v.15 no.1
• /
• pp.63-71
• /
• 2012

Purpose: The purpose of this study was to determine the effects of a fall prevention program on gait ability, one leg standing-right, one leg standing-left, fear of falling, fall efficacy, and depression in the elderly. Methods: A fall prevention program was consisted of fall preventing exercise with laughter therapy. Quasi-experimental design with one group pre- and post-test was used. Twenty-two elderly were participated in this study from a community health center located in a rural area, South Korea. SPSS/WIN 18.0 was used for descriptive analysis and paired t-test. Results: After 12 weeks with a fall prevention program, gait ability (t=3.44, p=.002), one leg standing-right (t=-3.73, p=.001), one leg standing-left (t=-4.17, p<.001) and fear of falling (t=2.12, p=.046) in the elderly were significantly improved. Conclusion: A fall prevention program was effective on physical and psychological functions. This study suggested that control groups and a larger sample should be included in order to validate the effects of a fall prevention program for the elderly. Key Words: Elderly, Fall prevention program, Physical functions, Psychological