• Journal of Korean Academic Society of Home Health Care Nursing
• /
• v.19 no.2
• /
• pp.195-203
• /
• 2012

Purpose: This study is conducted to investigate the stress level, stress source and stress coping of nursing students in college. Methods: This study was a cross sectional survey and the data was collected from 341 nursing students by means of self-reported questionnaires from April 2 to May 31, 2012. Collected data were analyzed on SPSS win 18.0. Results: The nursing students experienced moderate levels of stress. The source of stress for students came from 'one's own self'. The most common stress coping used by students was 'make a wish'. There were significant differences in the source of stress and the stress coping according to the nursing students' year of school and other general characteristics, such as motivation of entrance and satisfaction in school life. Conclusion: These results suggest that it is important to develop stress management program and strategies based on nursing students' individual characteristics and sources of stress.

• Journal of Ginseng Research
• /
• v.44 no.2
• /
• pp.267-273
• /
• 2020

Background: Continuous exposure to high temperatures can lead to heat stress. This stress response alters the expression of multiple genes and can contribute to the onset of various diseases. In particular, heat stress induces oxidative stress by increasing the production of reactive oxygen species. The liver is an essential organ that plays a variety of roles, such as detoxification and protein synthesis. Therefore, it is important to protect the liver from oxidative stress caused by heat stress. Korean ginseng has a variety of beneficial biological properties, and our previous studies showed that it provides an effective defense against heat stress. Methods: We investigated the ability of Korean Red Ginseng and Korean black ginseng extracts (JP5 and BG1) to protect against heat stress using a rat model. We then confirmed the active ingredients and mechanism of action using a cell-based model. Results: Heat stress significantly increased gene and protein expression of oxidative stress-related factors such as catalase and SOD2, but treatment with JP5 (Korean Red Ginseng extract) and BG1 (Korean black ginseng extract) abolished this response in both liver tissue and HepG2 cells. In addition, JP5 and BG1 inhibited the expression of inflammatory proteins such as p-NF-κB and tumor necrosis factor alpha-α. In particular, JP5 and BG1 decreased the expression of components of the NLRP3 inflammasome, a key inflammatory signaling factor. Thus, JP5 and BG1 inhibited both oxidative stress and inflammation. Conclusions: JP5 and BG1 protect against oxidative stress and inflammation induced by heat stress and help maintain liver function by preventing liver damage.

• Women's Health Nursing
• /
• v.14 no.3
• /
• pp.181-188
• /
• 2008

Purpose: The purpose of this study was to investigate perceived stress and dietary habits of female college students and define the relationships between them. Method: A convenient sampling method was used at a university based In Seoul. Finally, 412 students participated in the study from May 1 to June 10, 2008. The questionnaires administered consisted of a Stress Scale for college students and Dietary habit scale questionnaires. The students filled out the questionnaires by themselves. The collected data was analyzed with the SPSS Win 14.0 statistics program, which was used to calculate the frequencies, percentages, ANOVA, and Pearson's correlation of the variables. Result: The major findings of this study were as follows; In general, female students were mostly stressed by 'schooling.' Stress scores were significantly different in accordance with religion. Overall, dietary habits of study participants were normal. Significant differences were observed in the dietary habits between type of residence, major, and spending money per month. There was a significant relationship between perceived stress and dietary habits. Conclusion: Stress management for female college students should be developed and nutritional education programs should be reinforced.

• Child Health Nursing Research
• /
• v.26 no.2
• /
• pp.238-253
• /
• 2020

Purpose: The purpose of this study was to explore the structure of variables in studies related to unmarried mothers (UMs) based on Neuman's systems model, and the stressors and stress responses of UMs. Methods: Whittemore and Knafl's methodology for integrative reviews was applied. The literature was searched using five electronic databases (KISS, KMbase, KoreaMed, NDSL, and RISS) and a total of 99 variables were collected from 15 studies published between 2009 and 2019. Results: The main stressors for UMs were a sense of loss and burden caused by childbirth and childrearing. The main stress responses were parenting stress and depression, respectively. Within the basic structure of variables related to UMs, self-esteem played a crucial role by helping UMs adapt to their situation. Meanwhile, social support of UMs was significantly correlated with parenting stress, depression, and self-esteem. Conclusion: In order to understand UMs' stress, is necessary to explore their sense of loss, burden, and self-esteem. Furthermore, it is important to assess the level of parenting stress and depression of UMs and to provide effective interventions to alleviate these stressors. The results of this study provide useful knowledge that can be applied to nursing assessment and interventions for stress management in UMs.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• v.17 no.11
• /
• pp.3099-3120
• /
• 2023

The present fast-moving era brings a serious stress issue that affects elders and youngsters. Everyone has undergone stress factors at least once in their lifetime. Stress is more among youngsters as they are new to the working environment. whereas the stress factors for elders affect the individual and overall performance in an organization. Electroencephalogram (EEG) based stress level classification is one of the widely used methodologies for stress detection. However, the signal processing methods evolved so far have limitations as most of the stress classification models compute the stress level in a predefined environment to detect individual stress factors. Specifically, machine learning based stress classification models requires additional algorithm for feature extraction which increases the computation cost. Also due to the limited feature learning characteristics of machine learning algorithms, the classification performance reduces and inaccurate sometimes. It is evident from numerous research works that deep learning models outperforms machine learning techniques. Thus, to classify all the emotions based on stress level in this research work a hybrid deep learning algorithm is presented. Compared to conventional deep learning models, hybrid models outperforms in feature handing. Better feature extraction and selection can be made through deep learning models. Adding machine learning classifiers in deep learning architecture will enhance the classification performances. Thus, a hybrid convolutional neural network model was presented which extracts the features using CNN and classifies them through machine learning support vector machine. Simulation analysis of benchmark datasets demonstrates the proposed model performances. Finally, existing methods are comparatively analyzed to demonstrate the better performance of the proposed model as a result of the proposed hybrid combination.

• The Journal of Pediatrics of Korean Medicine
• /
• v.35 no.4
• /
• pp.96-111
• /
• 2021

Objectives The purpose of this study is to look for pathological mechanism of disease development caused by Taedok, by studying whether stress and diet in pregnant ICR mice affect the intestinal flora and IgA (Immunoglobulin A) concentration. Methods The mice were divided into 4 groups (n=5 per group) based on the concept of Taedok: the control group (G1), stress group (G2), capsaicin diet group (G3), high fat diet group (G4). We collected and analyzed intestinal flora from maternal feces and cecal flora from neonatal mice by group. Then, IgA concentration in the maternal feces and sIgA (secretory Immunoglobulin A) concentration in the cecal contents of newborn mice were analyzed. In addition, serum corticosterone was analyzed before and after stress application. Results Changes in maternal intestinal flora and neonatal mice cecal flora by stress and diet were observed. There were no significant changes in the IgA concentration in maternal feces and the sIgA concentration in the cecal contents of neonatal mice. No significant changes compared to the control group were observed between groups before and after applying stress. However, when comparing within one subject, a significant increase was confirmed after stress application in the stress group (G2). Conclusions Based on the results, we observed stress and diet in pregnant mice affect the intestinal flora of maternal and neonatal. We were able to interpret the pathological mechanism of Taedok based on the principle of interaction between mother and newborn intestinal flora.

• Journal of the Korean Society of School Health
• /
• v.29 no.1
• /
• pp.1-10
• /
• 2016

Purpose: The purpose of this study was to identify the mediating effect of stress coping type and self-esteem between life stress and suicidal ideation in nursing college students. The research design was descriptive study. Methods: A set of self-reported questionnaires was completed by 197 nursing college students, including demographic characteristics, life stress, stress coping type, self-esteem, and suicidal ideation. Data was analyzed using t-test, ANOVA, $Scheff{\acute{e}}^{\prime}s$ test, correlation analysis, and regression analysis for mediating effect by SPSS ver. 22. Results: The mean age was 20.9 years. The mean scores were 2.4, 3.6, and 1.7 out of 5 Likert scales for items of life stress, self-esteem, and suicidal ideation, respectively. The mean score for stress coping type was 2.36 out of 4 Likert scales. There was a positive correlation between suicidal ideation and life stress related to tasks, life stress related to interpersonal relationship, and emotion-focused coping of stress coping type (r=.537, p<.01); while a negative correlation between self-esteem and suicidal ideation. emotional-focused coping of stress coping type had a partial mediating effect between life stress related to tasks and suicidal ideation. Also, self-esteem had a partial mediating effect between life stress related to tasks and suicidal ideation as well as between life stress related to interpersonal relationship and suicidal ideation. Conclusion: Based on the finding of this study, it is necessary to apply various program to stress coping skill and self-esteem in order to reduce suicidal ideation in nursing college students.

• Perspectives in Nursing Science
• /
• v.14 no.2
• /
• pp.81-89
• /
• 2017

Purpose: This study was performed to identify levels of clinical practice stress and coping strategies according to the personality/behavior types of nursing students. Methods: The subjects of this study were 143 third- and fourth-grade nursing students in 14 nursing colleges who had experienced clinical practice. The questionnaire consisted of instruments to identify Dominance, Influence, Steadiness, and Conscientiousness (DISC) personality/behavior types, clinical stress, and stress coping strategies. The data were analyzed using Cronbach's ${\alpha}$, descriptive statistics, and ANOVA, using the SPSS 24.0 program. Results: The DISC pattern showed high priority in Steadiness (48.3%), followed by Conscientiousness (21.0%), Influence (16.1%), and Dominance (14.7%), in that order. The steadiness type showed the lowest level of stress among four patterns. Conclusion: This study found that the personality/behavior types of nursing students differ. Additionally, different personality/behavior types can be attributed to stress levels and stress coping behaviors. Based on these results, different personality and behavior types of nursing students should be considered to manage their stress levels related to the clinical practicum experience.

• Nuclear Engineering and Technology
• /
• v.54 no.3
• /
• pp.849-859
• /
• 2022

Feed-water valves (FWVs) are used to regulate the flow rate of water entering steam generators, which are very important devices in nuclear power plants. Due to the working environment of relatively high pressure and temperature, there is strength failure problem of valve body in some cases. Based on the thermo-fluid-solid coupling model, the valve body stress of the feed-water valve in the opening process is investigated. The flow field characteristics inside the valve and temperature change of the valve body with time are studied. The stress analysis of the valve body is carried out considering mechanical stress and thermal stress comprehensively. The results show that the area with relatively high-velocity area moves gradually from the bottom of the cross section to the top of the cross section with the increase of the opening degree. The whole valve body reaches the same temperature of 250 ℃ at the time of 1894 s. The maximum stress of the valve body meets the design requirements by stress assessment. This work can be referred for the design of FWVs and other similar valves.

• Geomechanics and Engineering
• /
• v.17 no.4
• /
• pp.385-392
• /
• 2019

The present fractional-order plasticity models for granular soil are mainly established under the triaxial compression condition, due to its difficult in analytically solving the fractional differentiation of the third stress invariant, e.g., Lode's angle. To solve this problem, a three dimensional fractional-order elastoplastic model based on the transformed stress method, which does not rely on the analytical solution of the Lode's angle, is proposed. A nonassociated plastic flow rule is derived by conducting the fractional derivative of the yielding function with respect to the stress tensor in the transformed stress space. All the model parameters can be easily determined by using laboratory test. The performance of this 3D model is then verified by simulating multi series of true triaxial test results of rockfill.