• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.9
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• pp.362-371
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• 2019

The purpose of this study is to recognize kindergarten teachers' experiences of child violence for identifying the site's needs for the implementation of preventive education in early childhood and to provide basic data on child violence. To this end, nine teachers were interviewed in-depth. From the study results, first, child violence-related child behavior, which usually occurs in kindergartens, includes physical assault, aggression, verbal violence, threats and threats, and bullying. Second, teachers usually use direct intervention laws in cases of child violence, but were finding it difficult to intervene properly with many tasks or high teacher-to-child ratios. Teachers recognized the need for lower teacher-to-child ratios and placement of each class burden. Third, teachers were aware of the need for prevention education for child violence targeting infants, and instigated the following appropriate interactions immediately after problem behavior occurred: large group activities, specific multimedia education data and parent education. Fourth, teachers are concerned about the possibility of problem behavior being learned and imitated through education in the implementation of prevention education for children's violence. Therefore, this study proposed the need to develop various teaching methods that could be applied to infant education sites, focusing on the types of child violence-related problem behaviors that occur in kindergartens.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.9
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• pp.175-181
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• 2019

In the case of a conventional single stage decompression regulator used for large depressurization in the hydrogen fuel cell system of a fuel cell electric vehicle (FCEV), problems can arise, such as pulsation, slow response, hydrogen brittleness, leakage, high weight, and high cost due to high decompression. Most of these problems can be overcome easily using two decompression mechanisms (two-stage structures). In addition, a wide outlet-pressure control range can be secured if an electronic solenoid is applied to the second decompression. Accordingly, it is necessary to improve the precision of the outlet pressure of a two-stage pressure-reducing regulator and develop techniques, such as leakage prevention, durability, light weight, and price reduction. Therefore, to improve the outlet pressure accuracy and prevent leakage, the structural part before and after decompression to improve the air tightness were divided and the analysis was carried out assuming that the valve part was closed (open ratio: 0%) after each initial internal pressure application.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.9
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• pp.7-13
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• 2019

Unlike a typical video wall system, video wall systems used for integrated monitoring in smart city environments should be able to display various videos, images, and texts simultaneously. In this paper, we propose an Internet Protocol (IP)-based video wall system that has no limit on the number of videos that can be monitored simultaneously, and that can arrange the monitor screen layout without restrictions. The proposed system is composed of multiple display servers, a wall controller, and video source providers, and they communicate with each other through an IP network. Since the display server receives and decodes the video stream directly from the video source devices, and displays it on the attached monitor screens, more videos can be simultaneously displayed on the entire video wall. When one video is displayed over several screens attached to multiple display servers, only one display server receives the video stream and transmits it to the other display servers by using IP multicast communications, thereby reducing the network load and synchronizing the video frames. Experiments show that as the number of videos increases, a system consisting of more display servers shows better decoding and rendering performance, and there is no performance degradation, even if the display server continues to be expanded.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.9
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• pp.474-480
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• 2019

We propose a method to evaluate a Modulation Transfer Function (MTF) using a circular target. In addition, a MATLAB GUI-based resolution analysis tool was developed to enhance the reliability of UAV image quality and the efficiency of the work. For this purpose, images were taken with an FC-6310 during flights at altitudes of 80 m, 120 m, and 150 m and by an iXM-100 at altitudes of 150 m, 200 m, and 400 m. The MTFs of UAV images were compared with traditional photogrammetry by measuring and analyzing MTFs on images taken by the UltraCAM Eagle Mark-2 sensor at a flight altitude of 1000 m. The results show that ${\sigma}MTF$ of the FC-6310 were 0.431(80 m), 0.524(120 m), and 0.699(150 m), and those of the iXM-100 were 0.332(150 m), 0.393(200 m), and 0.631(400 m), respectively. At the altitude of 150 m, the image quality of the iXM-100, which has a high-performance camera, was very high, and the effect of the camera performance on the image quality was confirmed. In addition, the ${\sigma}MTF$ of the UltraCAM Eagle Mark-2 was 0.711 due to the high flight altitude. This was the worst value among all UAV images. However, the ${\sigma}MTF$ of the FC-6310 at 150-m altitude was 0.699, which is almost the same as that of a manned aerial image.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.4
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• pp.597-605
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• 2019

IPM bridge is an integral bridge that can be applied from span 30.0m up to 120.0m, the shape conditions of IPM bridge is also applicable to the rahmen bridge. In this study, to perform the structural analysis of Rahmen bridge and IPM Bridge, the researchers compared the distribution types such as load, moment, and displacement of those bridges. Structural analysis was carried out on four span models ranging from single span bridges to four spans of 120.0 m, based on span length of 30.0 m. Structural analysis was carried out on those bridge with span 30.0m up to 120.0m. The conclusions drawn from this study are as follows. 1) The bending moments were calculated to be large for the Rahmen bridge, and the horizontal displacements were estimated to be large for the IPM bridge. 2) Since the bending moments are derived by the span length rather than the extension of the bridge, the permissible bending moment for the span length should be considered in the design. 3) The pile bent of the IPM bridge did not exceed the plastic moment of the steel pipe pile at 120.0m span, but because the horizontal displacement in the shrinkage direction is close to 25mm, the design considerations are needed. 4) In the actual design, it is important to ensure stability against member forces, so review of the negative moment is most important.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.5
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• pp.343-351
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• 2019

The purpose of this study is to investigate the effects of work environmental factors and self-compassion on the burnout of school counselors. The subjects of this study were 312 school counselors under the D District Office of Education participated. In order to examine the effects of individual, organizational, and self-compassion factors on burnout, correlation and hierarchical regression were applied. Individual factors were gender, age, health status, and personal hobbies. Organizational factors were employment type, working hours, and job satisfaction. Self-compassion and burnout were measured using the Korean version of self-compassion and Baslach burnout instruments. The correlation analysis showed that the three factors are correlated with each other. In the hierarchical regression analysis, three models were developed as personal, organizational, and self-compassion factors. The results of regression analysis are as follows. The influence of self-compassion on burnout was stronger than the organizational factor (i.e., employment type, working time, job satisfaction) and the personal factor (i.e., age, health status, hobby). There were no significant differences between genders. This study results suggest that self-compassion can reduce a level of burnout significantly, although personal and organizational factors have a significant impact on burnout. Further study and suggestions for reducing the level of burnout of school counselors were discussed.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.4
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• pp.639-647
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• 2019

Recently, as the semiconductor integration technology due to miniaturization and high density of electronic equipment have developed, it is importantly recognized the application of thermal control system in order to release inner heat generated from chips, modules, In this study, we considered the heat transfer and pressure drop characteristics in a horizontal channel with four blocks using k-${\omega}$ SST turbulence model During CFD (Computational Fluid Dynamics) analysis, the parameters applied block width, block height, heat source and turbulence generator placement etc. As the boundary conditions of analysis, the channel inlet temperature and flow velocity were respectively 300 K and 3.84 m/s, the heat flux was $358W/m^2$. As a result, the heat transfer performance was decreased as the block width ratio (w/h) was increased, while it was increased as the block height ratio (h/w) was increased. In addition, as the arrangement of heat source size was increased to high heat flux from low heat flux, it was influenced by heat source size and the heat transfer coefficient showed a tendency to increase, When the turbulence generator was installed in the upper part of block No. 1 position the closely to the channel entrance, the heat transfer characteristics was greatly influenced on the whole of four heating blocks. and in oder to consider the pressure drop characteristics, we are able to select the most appropriate turbulence generator's position.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.4
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• pp.571-579
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• 2019

To minimize the damage from chemical accidents, a risk management plan (RMP) has been implemented since 2015. According to this regulation, operators who handle more than the designated quantity of the accident preparedness chemicals should provide emergency response information to the public within the affected areas of accidents. The information, including chemicals, affected areas and evacuation instructions should be provided to the public in advance so that they can evacuate immediately in the event of a chemical accident. Currently, the information notification can be provided in various methods by being registered in the notification system, sent with written documents or delivered directly to the public. To examine the status of the operation method, this study analyzed similar cases overseas, investigated the degree of awareness of providing information through the number of the annual visitor of the Information Provision System, and obtained survey results from some residents. This current operation method are problems because the public, who do not have sufficient information about chemicals, do not understand the emergency information properly or it is difficult to recognize where the residents should find this information because of the convenient operation based on the information provider. In this study, measures were proposed to minimize the damage by making it easier for the public to understand the emergency information and the information communicated appropriately in advance by dividing them into an information providing method and post management.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.4
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• pp.382-390
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• 2019

As there is severe competition in the global foldable display market, strategic technology planning is required. Patent analysis as a tool for technology planning has frequently been used due to data characteristics such as openness, formality, and detailed information. However, traditional patent analysis has various limitations such as quantitative approaches are limited in evaluating contents of patents and identifying core technologies of firms as they rely on number of patents, and qualitative approaches have time and cost problems as researchers have to investigate each patent on a case-by-case basis. In this research, we analyze core technologies of firms in the foldable display sector analyzing patent co-classification Network. Results show that the number of patent applications has rapidly increased since 2014, and 92% of these patents are held by two panel manufacturers, SDC and LGD, and two device manufacturers, SEC and LGE. Network analysis shows that the two panel manufacturers' core technologies are similar and two device manufacturers are notably different. This research provides implications to the sector. Moreover, this study provides unique results drawn from co-classification network analysis, and therefore, our research suggests patent co-classification analysis as an effective tool for technology planning.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.12
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• pp.374-382
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• 2018

The aim of this study was to identify how information media about patient safety incidents influences nursing students' knowledge, perception, and confidence in performance toward patient safety. A total of 337 nursing students agreed to participate in this study. Data were collected from the participants between June 4 and June 12, 2018. Data were analyzed using descriptive statistics, t-test, one-way ANOVA, and Pearson's correlation coefficient with SPSS 21.0. Participants' scores for knowledge, perception, and performance confidence toward patient safety were $6.43{\pm}1.92$, $41.02{\pm}4.35$, and $39.61{\pm}5.89$, respectively. Patient safety knowledge was significantly different according to age, grade, and patient safety education experience. Patient safety perception was significantly different according to satisfaction with the major, patient safety performance confidence showed statistically significant differences according to grade, patient safety education experience, and major satisfaction. Information media exposure to patient safety incidents on TV and knowledge (r=.32, p<.000) and performance confidence (r=.21, p<.000) toward patient safety had positive correlations. Information media exposure to patient safety incidents on the internet and knowledge (r=.34, p<.000), perception (r=.12, p=.028), and performance confidence (r=.24, p<.000) toward patient safety also had positive correlations. This study provides basic data for nursing education and program development for patient safety management.