• Journal of the Korea Institute of Building Construction
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• v.18 no.5
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• pp.439-446
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• 2018

The PHC pile has been increasingly used due to its implementation of the top-base method, which is advantageous in high penetration rate and bearing capacity reinforcement. Typically, when a PHC pile is manufactured, high-strength mixed materials are mainly used to enhance the compressive strength. However, recent studies have been conducted to utilize ground granulated blast-furnace slag (GGBS) in terms of economic efficiency. For this reason, this study manufactured PHC pile considering the replacement ratio and curing conditions of GGBS instead of high-strength mixed materials, and further investigated the engineering properties of the PHC pile. According to the experimental results, the compressive strength of GGBS-replaced PHC pile increased by steam curing, and particularly, PHC pile with 20% replacement of GGBS under $80^{\circ}C$ steam curing condition showed a compressive strength of approximately 84MPa. Furthermore, the experimental results confirmed that more hydration products were generated under the $80^{\circ}C$ steam curing condition than that under the $20^{\circ}C$ steam curing condition, which would affect the higher density of the PHC pile as well as the increase in the compressive strength.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.2
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• pp.188-201
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• 2016

The aim of this descriptive correlation research was to identify the factors influencing stress in caregivers of stroke patients in rehabilitation centers. The data were collected from 200 caregivers at three rehabilitation centers in B City from September 1 to 30, 2015. The data were also collected utilizing the Connor-Davidson Resilience Scale, the Caregiving Mastery Scale, the Medical Outcomes Study (MOS) Scale, and Burden Interview (BI) Scale. The data were analyzed using the SPSS Win 18.0 program. The factor with the greatest impact on stress was social support, which accounted for 9.3% of stress, followed by the duration of giving care to the patient, religious status, economic conditions, caregiver's age, resilience, caregiver's health status, patient's conscious status, and patient's age, all of which accounted for 30% of the stress for caregivers. Therefore, it is essential to develop social support programs that can reduce the stress for caregivers of patients in rehabilitation centers and to develop stress intervention programs, taking all the factors affecting stress into consideration.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.8
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• pp.456-464
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• 2016

Increasing the strength of structural materials allows their self-weight to be reduced and this, in turn, enables the structures to satisfy esthetic requirements. The yield strength of high-performance steel is almost 480 MPa, which is approximately 50% higher than that of general structural steel. The use of high strength materials, however, makes the sections more slender, which can potentially result in significant local stability problems. The strength of slender element sections might be governed by their elastic buckling behavior, and the elastic buckling strength is very sensitive to the boundary conditions. Because the web provides the boundary conditions of the compressive thin-flange, the stiffness of the web can affect the elastic buckling strength of the flange. In this study, therefore, the effects of the flange and web slenderness ratios on the elastic flange local buckling of I-girders subjected to a pure bending moment were evaluated by finite element analysis (FEA). The analysis results show that the elastic local buckling strength and buckling modes were affected not only by the web support conditions, but also by the flange and web slenderness ratios.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.1
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• pp.185-193
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• 2012

This study conducted surveys of 88 eldery people over 100 years in Gyeongnam on April to June, 2011 during 90 days. It was intended to find the factors of longevity, Activity Daily of Living (ADL), and Instrumental Activity Daily of Living (IADL). Major results of this study were as follows: The factors of longevity are getting enough sleep over than seven hours(95.5%), taking in less salty food (69.8%), optimism without even thinking about suicide (86.9%), nonsmoking habit (92%), and moderation in drink (86.4%). The most difficult part of Activity Daily of Living (ADL) is taking a bath, and that of Instrumental Activity Daily of Living (IADL) is taking a bus or subway alone. All items of ADL and IADL, female was higher than the male, but not statistically significant(p<0.05). Therefore, further study is expected to develop the supplementary policy to support the elderly people with declining to carry out physical activities. It is also expected to develop the public welfare programs and policies for the aged, allowing them to take responsibility and to participate as a member of the society.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.11
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• pp.5939-5946
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• 2013

The bridge approach slabs (BAS) to provide a transitional roadway between a roadway pavement and a bridge structure have not performed adequately due to various factors. The current Korean Roadway Design Guidelines treat the BAS as a simply supported beam with 70% of the span length and do not consider settlement and void development underneath the slab. To investigate the effect of soil settlements on the bending moment of BAS, a beam on elastic support (BAS-ES) was used in the present study. The parameters used in this study were span length, washout length, washout location, and soil modulus. It was shown from the parametric study that washout regions closer to the midspan exhibit maximum moment in the slab. Since voids under the BAS have typically been observed to be closer to bridge abutments, the springs from the abutment were removed to simulate settlement and void development in the model. The design moments based on AASHTO LRFD Bridge Design Specifications were compared to those of Korean Standard Specifications for Highway Bridge and Design Trucks for Highway Bridges. Even if the design moment from BAS-ES was used to incorporate the effect of the potential washout, significant savings could still be achieved compared to the current BAS design.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.12
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• pp.597-607
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• 2019

In this study, we suggest a policy for setting the direction of Jeju Music Education with implications from the process of arranging philosophical theories related to music education and analyzing advanced cases. The philosophical theories of music education were examined by Schiller, Steiner, Dewey, Bourdieu, Reimer, and Elliotts. In addition, this study checked the lessons in music education programs in Germany, Venezuela, and Finland, and we make policy suggestions in four contexts to set the direction of music education in the Jeju community based on interviews with 10 experts. Suggestions for improving social awareness of music education, suggestions for music education in the elementary and secondary public school sectors, in the proposals for music education in the lifelong education sector, and the suggestions for institutional policy all included music education professionals recruited from among the culture and art sectors within the Jeju Special Self-Governing Province's Cultural Policy Division. Music advisors were also recruited from the music and sector music councils within the Jeju Special Self-Governing Province Council.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.9
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• pp.374-383
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• 2018

This study was conducted to compare the unmet needs and quality of life of permanent and temporary ostomates. The research subjects were 128 ostomates with colorectal cancer or other advanced cancers. Data were collected by self-reported completion of the Comprehensive Needs Assessment Tool in Cancer (CNAT) and the City of Hope Quality of Life (COH-QOL) Ostomy Questionnaire from February 1 to April 5, 2018. Collected data were analyzed by chi-squared and independent t-tests using IBM SPSS 21.0. The results showed that the unmet need for temporary ostomates was significantly higher than that of permanent ostomates (t=-2.284, P=0.024). Moreover, temporary ostomates showed a higher unmet need for information and education (t=-2.747, p=0.007), psychological problems (t=-2.578, p=0.011), and physicians (t=-2.599, p=0.010). Although quality of life of temporary ostomates seems lower than that of permanent ostomates, there was no significant difference between groups (t=-1.364, P=0.0175). Therefore, it is necessary to develop a self-management program to provide appropriate information and psychological support for temporary ostomates.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.3
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• pp.246-252
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• 2020

Safety accidents have been reported due to falling accumulated snow from cables of cable-supported bridges. In addition to the direct damage caused by falling snow, secondary damage, such as traffic accidents, can occur. Various methods have been proposed to prevent these accidents, but there are still problems in safety and practicality. In this study, a cable robot type was selected as one of the active methods for removing accumulated snow on cables. An attempt was made to increase the climbing ability of the robot to improve the efficiency of snow removal. In addition, the available range of cable diameter for the robot can be adjusted flexibly to be applied to cables used in the field. A high-resolution camera was also installed to check the surface condition of the cable in real time to increase the utility, and be used as a cable inspection robot. A three-axis accelerometer and a tension conversion algorithm were added to measure the tension force of cables. To verify the performance, indoor and field experiments were conducted, and future improvements for the inspection robot were proposed.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.3
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• pp.118-128
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• 2020

This descriptive study investigated the factors influencing on subjective happiness of senior nursing students. The participants were 235 nursing students in grades 3 and 4 in K city from May 1, 2019 to May 28, 2019. The data was collected using self-report questionnaires that contained items on subjective happiness, professional intuition, human relationship, major satisfaction, family health, and social support scale. The data was analyzed using descriptive statistics, Pearson's correlation coefficients, and stepwise multiple regression analysis with the SPSS 22.0 program. The subjective happiness of the subjects averaged 4.75±1.16 on the 7-point scale, and the subjective happiness according to the general characteristics of the subjects showed a significant difference in health status (F=6.826, p<.001). The most influential factors on the subjects' subjective happiness were health status (β=.177 p=.005), academic satisfaction (β=.138, p=.027), and family health (β=.268, p<.001), and the explanatory power of the model was 16.7% (F=15.160, p<.001). The results of this study may provide a foundation to develop an efficient intervention program to improve the happiness of senior nursing students.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.4
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• pp.173-180
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• 2020

This is the report of a case study to describe the results of applying an evaluation tool for communication ability when performing core basic nursing skills in fundamental nursing practice education. The communication ability evaluation tool was constructed based on a literature review and expert advice. The tool was applied to test 94 students who were taking fundamental nursing practice courses from October to November 2019. As a result, five factors (self-introduction, eye contact, emotional support, information provision, and therapeutic touch) were derived as evaluable items of communication ability to be evaluated when performing core basic nursing skill, and were evaluated when performing core basic nursing skills to measure vital signs. The average communication ability was 3.96 out of 5 points. According to the rubric, 95.8% of all students attained 'medium' and reached their goal achievement level. The findings of this study are meaningful in providing an important basis for improving the performance outcome evaluation process and for constructing a systematic evaluation system in fundamental nursing practicum. Further studies to secure the validity and reliability of this communication ability evaluation tool and comparative studies with various evaluation tools are suggested.