• Clinical and Experimental Reproductive Medicine
• /
• v.42 no.1
• /
• pp.1-7
• /
• 2015

Stress coping mechanisms are critical to minimize or overcome damage caused by ever changing environmental conditions. They are designed to promote cell survival. The unfolded protein response (UPR) pathway is mobilized in response to the accumulation of unfolded proteins, ultimately in order to regain endoplasmic reticulum (ER) homeostasis. Various elements of coping responses to ER stress including Perk, Ask1, Bip, Chop, Gadd34, Ire1, Atf4, Atf6, and Xbp1 have been identified and were found to be inducible in oocytes and preimplantation embryos, suggesting that, as a normal part of the cellular adaptive mechanism, these coping responses, including the UPR, play a pivotal role in the development of preimplantation embryos. As such, the UPR-associated molecules and pathways may become useful markers for the potential diagnosis of stress conditions for preimplantation embryos. After implantation, ER stress-induced coping responses become physiologically important for a normal decidual response, placentation, and early organogenesis. Attenuation of ER stress coping responses by tauroursodeoxycholate and salubrinal was effective for prevention of cell death of cultured embryos. Further elucidation of new and relevant ER stress coping responses in periimplantation embryos might contribute to a comprehensive understanding of the regulation of normal development of embryonic development and potentiation of embryonic development in vitro.

• Korean Journal of Human Ecology
• /
• v.15 no.5
• /
• pp.719-727
• /
• 2006

The purpose of this study is to examine the job satisfaction and the job stress of British child care teachers. Respondents, including childminders, were 137 British child care teachers who worked in nursery school, day nursery, creche, and playgroup. In the survey on the job satisfaction of British child care teachers, they were asked to answer two items. In the survey on their job stress level, they were required to rate their job-related stress levels on a 5 point scale of 'Job Stress scale' by Davis et al(2003). The results indicated: firstly, the British child care teachers are much satisfied with their job and have the low level of job stress. Secondly, their job satisfaction depends on who runs the child care facilities, what position they have in the centers, how long they work for child care, what qualifications they have. The levels of their job stress depend significantly on their present position in the centers. Thirdly, the job satisfaction of British child care teachers is explained about 27%, is related to their performing of daily routine, their age, the management of child care centers and qualifications of the teachers.

• Korean Journal of Child Studies
• /
• v.33 no.1
• /
• pp.205-221
• /
• 2012

The purpose of this study was to examine effects of father involvement, marital happiness and conflicts, and meanings of parenthood on maternal parenting stress and compare the relative importance of those variables in three (low, middle, and upper) income groups. The subjects of this study were 654 nuclear families which consisted of 3 family members, couple and their infant children aged between 4 months and 10 months. Data was taken from the 2008 Panel Data of Korean Children. The results of this study were as follows : First, maternal parenting stress, father involvement, mother's marital satisfaction and conflicts were statistically significant according to income levels. Second, mother's marital satisfaction was the most significant variable in predicting father involvement, and mother's marital conflict was the most significant one in predicting maternal parenting stress. Third, the significance and numbers of variables which were impacted upon maternal parenting stress and father involvement varied according to income groups. Fourth, in all three income groups, the effects of father involvement on maternal parenting stress was not significant when marital relationship and meanings of parenthood underwent in regression analysis. However, father involvement was impacted upon maternal parenting stress by itself.

• Journal of Korean Academy of Fundamentals of Nursing
• /
• v.16 no.3
• /
• pp.353-361
• /
• 2009

Purpose: The purpose of this study was to examine the relationship of adult the women's satisfaction with their appearance, self-esteem, depression and stress to health related quality of life (HRQOL) across the lifespan. Method: In this study a convenience sample of Korean women aged 20 years and over was used. There were 1152 women and data were collected from November 2007 to February 2008. Results: There was no difference in satisfaction with appearance in all age group. Elderly women reported lowest self esteem and HRQOL and highest depression and stress. There were statistical significances between satisfaction with appearance, self-esteem, depression, stress and HRQOL for all age groups. The most significant predictors of HRQOL in early adulthood women were stress and depression. The most significant predictors of HRQOL in middle adulthood women were stress, disease, depression, self-esteem, and monthly income. The most significant predictors of HRQOL in elderly women were stress, disease, depression, and satisfaction with appearance. Conclusion: The results indicate that HRQOL of Korean women is associated with psychological distress as with stress and depression. When developing programs to enhance health in elderly women, consideration should be given to body image as well as psychological distress and chronic conditions.

• Journal of Technologic Dentistry
• /
• v.40 no.4
• /
• pp.249-259
• /
• 2018

Purpose: This study aimed to investigate the relationship between dental technology students' life stress and smartphone addiction in order to detect smartphone over-users early, prevent them from getting addicted, and obtain basic data for creating a positive environment for academic achievement by using smartphone in a right way. Methods: The subjects of this study were university students at D University and G University in Daejeon Metropolitan City and Gangwon-do. A questionnaire survey was conducted to the subjects who understood the purpose of this study and participated in it from March 1 to June 10, 2018, and 243 were finally analyzed except 24 questionnaires without sufficient answers. Results: As a result of multiple regression analysis with variables, which were significant in univariate analysis, as independent variables, there were gender and smartphone dependency as general characteristics affecting the degree of smartphone addiction, and family relations and future problems among stress sub-factors were selected as significant variables. Conclusion : In the case of college students, they choose the smartphone as the easiest way to relieve stress because they lack the time and space to actually release stress. Therefore, club activities or on-campus and extra-curricular activities are recommended, and it needs to seek a way to get rid of stress by solving the cause of stress through counseling.

• The Journal of Asian Finance, Economics and Business
• /
• v.9 no.1
• /
• pp.177-187
• /
• 2022

Theoretical literature agrees on the interaction between financial instability and economic activity but explains it's dynamic in two points of view: one is that the transmission mechanism occurs in one unique regime and the other reckons a shift of regime leads to the alteration of the transmission mechanism. This study aims to find evidence of the multi-regime transmission for ASEAN developing countries. The author employs the technique of Threshold vector auto regression using the financial stress index standing for financial instability. Monthly data is collected, covering a period long enough with many episodes of high stress in recent decades. There are two conclusions: (1) A financial shock has a negative and stronger impact on economic activity during a high-stress period than it does during a low-stress period; (2) the response of economic activity to a negative financial shock during high-stress periods is stronger than it is during normal times. The findings point to the importance of the financial stress index as an additional early warning indicator for the real economy sector, as well as the positive effect that a reduction in financial stress may have on economic activity, implying the importance of "unconventional" monetary policy in times of high financial stress.

• Journal of the Korea Convergence Society
• /
• v.10 no.5
• /
• pp.359-367
• /
• 2019

This study was done to examine the effect of 'Zippy's friends' program based on stress coping model for early child. A nonequivalent control group was designed to conduct a pre-post test for this study. The participants for this study were 148 first grade elementary school students in G city(experimental group=72, control group=76). The experimental group received 'Zippy's friends program for 24 weeks (6 module, 24 hours). The control group did not receive any treatment. From April to December 2017 data were collected using self-report structured questionnaires, and were analyzed using the ${\chi}^2$-test, t-test, and ANCOVA with SPSS/WIN 20.0 Program. After the treatment, significant differences were found between the experimental group and control groups in terms of stress coping ability( F=22.77, p<.001),but not in level of emotional intelligence (t=-.37, p=.715). Results of this study indicate that Zippy's program can be used in school based practice as an effective mental health intervention for early child.

• Journal of Korean Neurosurgical Society
• /
• v.55 no.3
• /
• pp.125-130
• /
• 2014

Objective : This study was conducted to elucidate neuroprotective effect of carnosine in early stage of stroke. Methods : Early stage of rodent stroke model and neuroblastoma chemical hypoxia model was established by middle cerebral artery occlusion and antimycin A. Neuroprotective effect of carnosine was investigated with 100, 250, and 500 mg of carnosine treatment. And antioxidant expression was analyzed by enzyme linked immunosorbent assay (ELISA) and western blot in brain and blood. Results : Intraperitoneal injection of 500 mg carnosine induced significant decrease of infarct volume and expansion of penumbra (p<0.05). The expression of superoxide dismutase (SOD) showed significant increase than in saline group in blood and brain (p<0.05). In the analysis of chemical hypoxia, carnosine induced increase of neuronal cell viability and decrease of reactive oxygen species (ROS) production. Conclusion : Carnosine has neuroprotective property which was related to antioxidant capacity in early stage of stroke. And, the oxidative stress should be considered one of major factor in early ischemic stroke.

• Structural Engineering and Mechanics
• /
• v.69 no.1
• /
• pp.33-42
• /
• 2019

Thermal cracks are cracks that commonly form at early ages in mass concrete. During the concrete pouring process, the elastic modulus changes continuously. This requires the time domain to be divided into several steps in order to solve for the temperature, stress, and displacement of the concrete. Numerical simulations of thermal crack propagation in concrete are more difficult at early ages. To solve this problem, this study divides crack propagation in concrete at early ages into two cases: the case in which cracks do not propagate but the elastic modulus of the concrete changes and the case in which cracks propagate at a certain time. This paper provides computational models for these two cases by integrating the characteristics of the extended finite element algorithm, compiles the corresponding computational programs, and verifies the accuracy of the proposed model using numerical comparisons. The model presented in this paper has the advantages of high computational accuracy and stable results in resolving thermal cracking and its propagation in concrete at early ages.

• Proceedings of the Korean Geotechical Society Conference
• /
• 2003.03a
• /
• pp.315-322
• /
• 2003

Cyclic simple shear tests were performed to find out the effect of preshear on dynamic strength of the sandy soil. Tests were performed for the specimens with 40% and 60% of relative density, under three different effective vertical stress of 50, 100 and 200kPa. For 50 and 100kPa, preshear ratios 0.00, 0.08, 0.12 and 0.16 were given, respectively, For low and high relative densities, two different results are shown in dynamic tests. Under the dense conditions, the maximum shear stress ratio($\tau$$\_$cyc//$\sigma$$\_$vo/) and the cyclic shear stress ratio($\tau$$\_$cyc//$\sigma$$\_$vo/) causing a certain shear strain increase with augmenting preshear ratio(${\alpha}$). However, the maximum shear stress ratio and the cyclic shear stress ratio increase or decrease with increasing preshear ratio under the loose conditions. Correction factor(K$\_$${\alpha}$/) for preshear increases at an early stage and then decreases with increasing preshear ratio at loose condition and increase with increasing preshear ratio at dense condition. Correction factor (K$\_$${\alpha}$,Max/) for preshear increases with the increasing preshear ratio irrespective of relative density, and the value of has same behavior as K$\_$${\alpha}$/.