• Geomechanics and Engineering
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• 제14권4호
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• pp.337-344
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• 2018

The study of the mining effect influenced by a normal fault has great significance concerning the prediction and prevention of fault rock burst. According to the occurrence condition of a normal fault, the stress evolution of the working face and fault plane, the movement characteristics of overlying strata, and the law of fault slipping when the working face advances from footwall to hanging wall are studied utilizing UDEC numerical simulation. Then the inducing-mechanism of fault rock burst is revealed. Results show that in pre-mining, the in situ stress distribution of two fault walls in the fault-affected zone is notably different. When the working face mines in the footwall, the abutment stress distributes in a "double peak" pattern. The ratio of shear stress to normal stress and the fault slipping have the obvious spatial and temporal characteristics because they vary gradually from the higher layer to the lower one orderly. The variation of roof subsidence is in S-shape which includes slow deformation, violent slipping, deformation induced by the hanging wall strata rotation, and movement stability. The simulation results are verified via several engineering cases of fault rock burst. Moreover, it can provide a reference for prevention and control of rock burst in a fault-affected zone under similar conditions.

• Journal of Digital Convergence
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• 제17권6호
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• pp.447-455
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• 2019

The purpose of this study is to examine the effect of social support on the awareness of child neglect and the difference of the child neglect awareness according to the experience or not of child abuse prevention education surveying parents. The subject of investigation consisted of 388 parents living in metropolitan area A. The analysing methods are correlation and multi-group analysis using structural equation modeling. The results of this study are as follows: First, the variable of social support has the positive statistic association with the awareness of child neglect. Second, as a result of the multi-group analysis, there is the statistical difference of the child neglect awareness between the parent group having child abuse prevention education and the parent group having no education.

• The Journal of the Korea Contents Association
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• 제19권4호
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• pp.532-545
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• 2019

The objective of this study is to find out the effect of the secondary traumatic stress prevention program for counselors at child protection agencies. The quasi-experiment design was used for pre-test, post-test, and for follow-up test, performed 3 months after the program. Experimental group consisted of 9 counselors, while the comparison group consisted of 10 counselors. As a result, it was revealed that secondary traumatic stress prevention program was effective in decreasing the secondary traumatic stress and depression of the counselors, and also effective in increasing stress coping even though it was not statistically significant. Follow-up test did not present statistically significant changes in secondary traumatic stress, depression, and stress coping. It was found that, to achieve continued effect of the program, much longer and sustained program is required. Based on these findings, the necessity and application of the secondary traumatic stress prevention program were suggested.

• Geomechanics and Engineering
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• 제32권2호
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• pp.145-157
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• 2023

This paper aims at investigating the face stability of large-diameter underwater shield tunnels considering seepage in soft-hard uneven strata. Using the kinematic approach of limit upper-bound analysis, the analytical solution of limit supporting pressure on the tunnel face considering seepage was obtained based on a logarithmic spiral collapsed body in uneven strata. The stability analysis method of the excavation face with different soft- and hard-stratum ratios was explored and validated. Moreover, the effects of water level and burial depth on tunnel face stability were discussed. The results show the effect of seepage on the excavation face stability can be accounted as the seepage force on the excavation face and the seepage force of pore water in instability body. When the thickness ratio of hard soil layer within the excavation face exceeds 1/6D, the interface of the soft and hard soil layer can be placed at tunnel axis during stability analysis. The reliability of the analytical solution of the limit supporting pressure is validated by numerical method and literature methods. The increase of water level causes the instability of upper soft soil layer firstly due to the higher seepage force. With the rise of burial depth, the horizontal displacement of the upper soft soil decreases and the limit supporting pressure changes little because of soil arching effect.

• Asian Pacific Journal of Cancer Prevention
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• 제16권18호
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• pp.8445-8450
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• 2016

Background: Breast cancer is the most common neoplasm in women and the most frequent cause of death in those between 35 and 55 years of age. All multicellular organisms have an innate immune system, whereas the adaptive or 'acquired' immune system is restricted to vertebrates. This study focused on the effect of conditioned medium isolated from cultured breast cancer cells on NB4 neutrophil-like cells. Materials and Methods: In the current study neutrophil-like NB4 cells were incubated with MCF-7 cell-conditioned medium. After 6 h incubation the intracellular receptor TLR2, was analyzed. Results: The results revealed that MCF-7 cell-conditioned medium elicited expression of TLR2 in NB4 cells. Conclusions: This treatment would result in the production of particular stimulants (i.e. soluble cytokines), eliciting the expression of immune system receptors. Furthermore, the flow cytometry results demonstrated that MCF-7 cell-conditioned medium elicited an effect on TLR2 intracellular receptors.

• 한국노년학
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• 제37권1호
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• pp.173-200
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• 2017

This study is designed to verify the actual effect on the prevention of the elderly suicide of the integrated crisis intervention service which has been widely provided across all local communities in Gyeonggi-province focusing on the integrated crisis intervention model developed for the prevention of elderly suicide. The integrated crisis intervention model for the local communities and its manual were developed for the prevention of elderly suicide by integrating the crisis intervention theory which contains local community's integrated system approach and the stress vulnerability theory. For the analysis of the effect, the geriatric depression and suicidal ideation scale was adopted and the data was collected as follows; The data was collected from 258 people in the first preliminary test. Then, it was collected from the secondary test of 184 people after the integrated crisis intervention service was performed for 6 months. The third collection of data was made from 124 people after 2 or 3 years later using the backward tracing method. As for the analysis, the researcher used the R Statistics computing to conduct the test equating, and the vertical scaling between measuring points. Then, the researcher conducted descriptive statistics analysis and univariate analysis of variance, and performed multi-level modeling analysis using Bayesian estimation. As a result of the study, it was found out that the integrated crisis intervention model which has been developed for the elderly suicide prevention has a statistically significant effect on the reduction of elderly suicide in terms of elderly depression and suicide ideation in the follow-up measurement after the implementation of crisis intervention rather than in the first preliminary scores. The integrated crisis intervention model for the prevention of elderly suicide was found to be effective to the extent of 0.56 for the reduction of depression and 0.39 for the reduction of suicidal ideation. However, it was found out in the backward tracing test conducted 2-3 years after the first crisis intervention that the improved values returned to its original state, thus showing that the effect of the intervention is not maintained for long. Multilevel analysis was conducted to find out the factors such as the service type(professional counseling, medication, peer counseling), characteristics of the client (sex, age), the characteristics of the counselor(age, career, major) and the interaction between the characteristics of the counselor and intervention which affect depression and suicidal ideation. It was found that only medication can significantly reduce suicidal ideation and that if the counselor's major is counseling, it significantly further reduces suicidal ideation by interacting with professional counseling. Furthermore, as the characteristics of the suicide prevention experts are found to regulate the intervention effect on elderly suicide prevention in applying integrated crisis intervention model, the primary consideration should be given to the counseling ability of these experts.

• Journal of the Korean Society of Environmental Restoration Technology
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• 제4권1호
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• pp.98-109
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• 2001

This study aimed to investigate the effect of revegetation technique for water attacking point using waterlogged prevention frame revetment. In this study, we evaluate frame revetment stability, water quality, plant growth and ecological and envirnomental changes in Mooshim streamside landscape. The results are as follows; 1) The waterlogged prevention frame revetment appeared to be stable despite of two big floods. The materials used for the revetment were not eroded on the water attacking point. Thus, we confirmed the effect of scour prevention of the frame work. 2) The effects of the frame revetment on the water quality appeared to be good for the surrounding environment. Dissolved Oxygen(DO) was higher about $0.4{\sim}0.6mg/{\ell}$ at the frame revetment than that of the main stream flow. pH value was lower about 0.4~0.5. Electric Conductivity(EC) showed lower about $0.8{\sim}1.1{\mu}s/cm$. at submersion prevent frame than the low-flow of the stream. Turbidity was lower about $0.6{\sim}1.2mg/{\ell}$. 3) As the effects on ecological and environmental conditions, we discovered a number of carassius auratus and Zacco platypus in the frame revetment area. Also, sympetrum balteata, coenagrionidae was observed frequently. 4) The plant growth did not appear to tumble or wither despite of two big floods. The visual rating of plant growth was evaluated as medium (around 5 point) 5) The landscape analysis derived four factors(i.e. the harmony, the variation, the flexibility and the provincial characteristics) from the factor analysis.

• Journal of Bio-Environment Control
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• 제29권4호
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• pp.448-455
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• 2020

This study was carried out to investigate reduction of the frost damage using the mesh net used for the purpose of non-bagged cultivation. A device measuring the weight of frost was developed and installed in both the control and the experimental, and the effect of frost reduction was evaluated with their weights. As a result, weight of frost in the control was reduced from 37% to 59% with mesh net on the day the frost was observed. In addition, the device for automatically observing the amount of frost was developed and the height of the windbreak of the frost measuring device was determined to be 30 cm through wind tunnel experiment. The results of this study are expected to reduce frost damage during the flowering season of fruit trees by installing mesh net and it is expected to be used as basic data for agricultural use of mesh net.

• Journal of the Korea Academia-Industrial cooperation Society
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• 제14권4호
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• pp.1604-1611
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• 2013

The purpose is to figure out the effects of education for environmental pollution prevention through forest experiences on children's nature-friendly attitudes and scientific problem solving ability. To achieve this, an experiment was conducted on total 44 kindergarten children in a class for 5-year-olds, who are classified into experimental group of 22 children(12 male children, 10 female children) and comparative group of 22 children(13 male children, 9 female children), in a C farming village. The results are as follows. First, the change of children's nature-friendly attitudes by group showed that education for environmental pollution prevention through forest experiences had an effect on the improvement of children's nature-friendly attitudes. Second, the change of children's scientific problem solving ability by group showed that education for environmental pollution prevention through forest experiences had an effect on the improvement of children's scientific problem solving ability. This implies that children's forest activities are useful in improving their nature-friendly attitudes and scientific problem solving ability.

• The Korean Journal of Food And Nutrition
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• 제25권2호
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• pp.383-392
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• 2012

Atopic related skin symptoms must be controlled continually. Because it is involved with food, eating behaviors play an important role in the prevention and management of atopic dermatitis. The aim of this study was to develop and apply nutrition education program for the prevention and management of atopic dermatitis on elementary school students. After applying the nutrition education program, our research attempts to evaluate the effectiveness of such nutrition education program. This study examined the effects of a nutrition education program on atopic dermatitis-related snacking behaviors, eating attitudes, and food behaviors. Subjects were 3rd grade elementary school students in Daejeon. A 6-week nutrition education program was implemented to 97 children as the educated group and another 94 children were included in the study as the control group. A self-administered questionnaire was used to assess the effects of nutrition education program. As results, eating attitudes reached significant improvement by the nutrition education program(p<0.05). In a paired t-test, the control group did not show significant difference, but the educated group showed a significant difference. In snacking behaviors, the two groups did not show statistical difference except for some considering factors. Also, there were no significant differences of the two groups after nutrition education program, except the snacking place after the nutrition education group. However, in the educated group, the types of snacks made by mothers increased 17.5% from 40.2% to 57.7%, and in-house as snacking place increased 13.4% from 68% to 81.4%. In the results of before and after the nutrition education program, the program showed some effect on the prevention and management of atopic dermatitis. Therefore, these results showed foundation for nutritional education and various educational programs are needed afterward to increase the effect of nutrition education in the prevention and management policy related to atopic dermatitis.