• 한국산학기술학회논문지
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• 제22권1호
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• pp.672-680
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• 2021

본 연구의 목적은 학교부적응 청소년을 대상으로 청소년 안녕감이 진로결정 자기효능감에 미치는 영향 및 지역사회자본의 매개효과에 대하여 파악하는데 있다. 연구대상은 울산광역시의 학교부적응 청소년 116명을 대상으로 실시하였다. 분석방법은 R 프로그램을 사용하여 요인분석과 신뢰도분석을 토대로 빈도분석, 기술통계 분석, 상관분석, 회귀분석을 통한 3단계 매개효과 분석과 Sobel 검정을 실시하였다. 연구결과 첫째, 청소년 안녕감은 진로결정 자기효능감에 유의미한 정(+)적 영향을 미치는 것으로 나타났다. 둘째, 청소년 안녕감이 진로결정 자기효능감에 미치는 영향에 대하여 지역사회자본의 부분매개효과가 확인되었다. 이는 학교부적응 청소년의 청소년 안녕감이 높아지고, 다양하며 유의미한 정(+)적 지역사회자본이 많을수록 진로결정 자기효능감이 높아진다는 것을 의미하는 것이다. 이러한 결과를 종합해 볼 때, 청소년 안녕감을 높일 수 있는 교육 프로그램의 개발과 활용 및 청소년의 심리적 특성을 반영한 진로탐색과 결정에 도움을 주는 전문화된 상담서비스의 체계적인 개입이 필요하다. 따라서 학교부적응 청소년의 진로결정 자기효능감 능력을 향상시키기 위해서는 청소년 안녕감의 강화가 필요하며 이를 위해 지역사회자본을 통한 다양한 전략이 마련되어야 하겠다.

• 가정과삶의질연구
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• 제32권3호
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• pp.115-135
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• 2014

The purpose of this study was to develop a "Family Play Therapy Program" using puppets to decrease attachment problems for families with children having attachment problems and to examine its effectiveness. The participants were an experimental group of 16 individuals(8 children with attachment problems whose ages ranged from 4 to 5 and 8 mothers) and a control group of 16 individuals (8 children with attachment problems whose ages ranged from 4 to 5 and 8 mothers). The experimental group was treated through the Family Play Therapy Program, which involved the use of puppets and was held for twelve sessions twice a week. The changes in the participants were measured in order to examine the effects of the program. The researcher measured children's emotional and behavioral expression(TBP), the mothers' sense of self(Self-Differentiation Scale), personal relationships(ECR-R), and the perception of family functions(ICPS-FFS) both before and after the FPT program and compared their differences. The MIM Rating Scale and Marschak Behavior Rating Scale were administered to examine the interactions between mothers and children, and 1:1 interviews were also conducted. The data thus gathered were used for non-parametric analysis(Mann-Whitney U test and Wilcoxon rank sum test)using SPSS WIN 17.0. The results of this study were as follows: First, the program had a positive effect on children's emotional expression. After the problem were over, negative emotional and behavioral expression in the experimental group decreased. Second, the program had a positive effect on mothers' self-differentiation and personal relationships. Third, the program had a positive effect on changes in the interaction behaviors between the mother and child. Fourth, the program had a partially positive effect on the responses from their group developmental stages, especially on the subscale of both a program for the reinforcement of mothers' emotions and family play program utilizing puppets.

• Computers and Concrete
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• 제20권3호
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• pp.283-290
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• 2017

The aim of this study is to investigate the effect of the bond strength of self-compacting mortars (SCMS) produced from ground pumice powder (GPP) as a mineral additive. In this scope, six series of mortars including control mix were prepared that consist of 7%, 12%, 17%, 22% and 27% of ground pumice powder by weight of cement. A total of 54 specimens of $40{\times}40{\times}160mm$ were produced and cured at the age of 3, 28 and 90-day for compressive and tensile strength tests and 18 specimens of $150{\times}150{\times}150mm$ mortar were prepared and cured at 28 days for bond strength tests. Flexural tensile strength and compressive strength of $40{\times}40{\times}160mm$ specimens were measured at the curing age of 7, 28 and 90-day. Mini V-funnel flow time and mini slump flow diameter tests were also conducted to obtain rheological properties. As a result of the study, it was observed that the SCMs containing 12% of GPP has the highest bond strength as compared to control and GPP mortars. Compressive strength slightly increased up to 12% of GPP.

• 한국자동차공학회논문집
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• 제18권3호
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• pp.8-18
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• 2010

According to the needs of change to hybrid, fuel cell and electric vehicle, and to the increasing demand for safety and eco-friendliness, the necessity of Electro-Mechanical Brake(EMB) is being increased. But, one of the most important problems for realizing EMB to the practical use is that the required motor power for braking is too high. So the high braking efficient EMB is required. In recent years, the Electronic Wedge Brake(EWB) is noticeable for the high braking efficiency. In this research, we examine the improvable matter of the recent published EWB, and we propose the improved mechanism and the cost effective control method using this mechanism. And we test these feasibility by experiment and discuss these meaning and effect.

• Computers and Concrete
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• 제14권3호
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• pp.299-313
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• 2014

Effects of polypropylene (PP) fibers, steel fibers (SF) and hybrid on the properties of highstrength fiber reinforced self-consolidating concrete (HSFR-SCC) under different volume contents are investigated in this study. Comprehensive laboratory tests were conducted in order to evaluate both fresh and hardened properties of HSFR-SCC. Test results indicated that the fiber types and fiber contents greatly influenced concrete workability but it is possible to achieve self consolidating properties while adding the fiber types in concrete mixtures. Compressive strength, dynamic modulus of elasticity, and rigidity of concrete were affected by the addition as well as volume fraction of PP fibers. However, the properties of concrete were improved by the incorporation of SF. Splitting tensile and flexural strengths of concrete became increasingly less influenced by the inclusion of PP fibers and increasingly more influenced by the addition of SF. Besides, the inclusion of PP fibers resulted in the better efficiency in the improvement of toughness than SF. Furthermore, the inclusion of fibers did not have significant effect on the durability of the concrete. Results of electrical resistivity, chloride ion penetration and ultrasonic pulse velocity tests confirmed that HSFR-SCC had enough endurance against deterioration, lower chloride ion penetrability and minimum reinforcement corrosion rate.

• 대한의료기공학회지
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• 제11권1호
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• pp.198-220
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• 2009

1. Korean archery is very important in body-mind therapy because it has excellent effect in physical and spiritual culture. 2. Korean archery culture has physical effect that reinforce eum-gyeong(陰經) muscles, thus it much affect on reinforcement of ha-cho(下焦) and ha-dan-jeon(下丹田). 3. Korea archery has spiritual effect : etiquette, concentration, a state of balance, discipline, self-control, modesty, courage. 4. Author present model of korean archery culture and think enforcement the model will affect therapy and prevention Korean archery therapy is on elementary level, lack clinical datas. If the data of therapy which is proved objectively is more larger, korean archery therapy will be more popular by exercise therapies.

• Elastomers and Composites
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• 제53권3호
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• pp.175-180
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• 2018

Solution-styrene-butadiene rubber (SSBR) composites were manufactured using four kinds of fillers: silica-silane coated carbon black (SC-CB) hybrid, starch-SC-CB hybrid, pure silica, and pure starch. The influence of filler type on the mechanical properties of the rubber matrix was studied in this work. SC-CB was prepared by silane-graft-coating using vinyl triethoxy silane and carbon black, which enhanced the dispersion effect between the rubber matrix and the filler, and improved the mechanical properties of the compounds. The morphology of the composites was observed by field-emission scanning electron microscopy (FE-SEM). The thermal decomposition behavior of the composites was determined by thermogravimetric analysis (TGA), and the crosslinking behavior of the composites was tested using a rubber process analyzer (RPA). The hardness, tensile strength, swelling ratio, and gas transmittance rate of the composites were evaluated according to ASTM. The test results revealed that with the addition of SC-CB, the hybrid fillers, especially those blended with silica, showed a better reinforcement effect, the highest hardness and tensile strength, and stable thermal decomposition behavior. This implies that the silica-SC-CB hybrid filler has a notable mechanical reinforcement effect on the SSBR matrix. Because of self-crosslinking during its synthesis, the starch-SC-CB hybrid filler produced the most dense matrix, which improved the anti-gas transmittance property. The composites with the hybrid fillers had better anti-swelling properties as compared to the neat SSBR composite, which was due to the hydrophilicity of silica and starch.

• 대한간호학회지
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• 제34권3호
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• pp.440-448
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• 2004

Purpose: This study was to evaluate the effects of a physical activity reinforcement program on exercise compliance, depression, and anxiety in continuous ambulatory peritoneal dialysis(CAPD) patients. Method: A nonequivalent control group with a pre-post test was designed. Data collection was done from December, 2002 to June, 2003 at a hoapital. The degree of depression and anxiety of the patients was assessed by the score of SCL-90-R, and exercise compliance was measured by exercise period, frequency, time and intensity. The experimental group was composed of 19 participants who were educated based on an exercise education protocol and carried out walking exercises two to four times a week after hearing verbal persuasion biweekly through the telephone or a face-to-face interview for 12 weeks, while 17 participants in control group received no intervention. Result: 1. The experimental group showed significant improvement in self-efficacy of exercise compliance (U=79.00, p=.01), exercise period ($x^2$=20.84, p=.00), exercise frequency ($x^2$=9.03, p=.0l), exercise time ($x^2$=9.03, p=.0l) and exercise intensity ($x^2$=11.09, p=.00) compared to those of the control group. 2. The experimental group showed a lower depression score (U=84.50, p=.01) than the results of the control group. 3. However, there were no changes in anxiety level compared to the control group. Conclusion: The physical activity reinforcement program was found to have an effect on exercise compliance and the depression score of CAPD patients. The results provided evidence for the importance of physical activity and verbal persuasion in CAPD patients.

• 문화기술의 융합
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• 제10권1호
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• pp.395-402
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• 2024

본 연구의 목적은 학업부진 전문대학생을 위한 집중 지원 프로그램이 학생들의 학습동기 및 자기학습효능감에 미치는 효과를 검증하고 의미를 탐색하는 것이다. 본 연구는 부산광역시 D대학교 교수학습개발센터가 학사경고자 및 성적부진 학생들을 대상으로 지원한 JUMP-UP 프로그램에 참여한 46명의 학생을 대상으로 진행되었다. 본 연구의 연구문제는 첫째, JUMP-UP 프로그램은 전문대학생의 학습동기 강화에 영향을 미치는가? 둘째, JUMP-UP 프로그램은 전문대학생의 자기학습효능감에 영향을 미치는가?이다. JUMP-UP 프로그램 참여 전·후 설문조사를 실시하여 효과성을 살펴본 결과 JUMP-UP 프로그램은 참여 학습자의 학습동기와 자기학습효능감 모든 항목에서 통계적으로 유의미한 변화를 나타내었다. 이를 통하여 JUMP-UP 프로그램과 같은 집중 지원 프로그램은 학업부진을 겪는 전문대학생의 학습동기 및 자기학습효능감 향상에 적합한 지원 프로그램으로 가치가 있다는 것을 알 수 있다.

• Advances in concrete construction
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• 제9권4호
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• pp.387-395
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• 2020

This study has been carried out in two-phases to develop Fiber Reinforced Self-Compacting Concrete (FRSCC) performance. In the first phase, the composition of the quaternary composite binder compromised CEM I 42.5N (58-70%), Rice Husk Ash (25-37%), quartz sand (2.5-7.5%) and limestone crushing waste (2.5-7.5%) were optimized. And in the second phase, the effect of two fiber types (steel brass-plated and basalt) was investigated on the SCC optimized with the optimum CB as disperse reinforcement at 6 different ratios of 1, 1.2, 1.4, 1.6, 1.8, and 2.0% by weight of mix for each type. In this study, the theoretical principles of the synthesis of self-compacting dispersion-reinforced concrete have been developed which consists of optimizing structure-formation processes through the use of a mineral modifier, together with ground crushed cement in a vario-planetary mill to a specific surface area of 550 m2 / kg. The amorphous silica in the modifier composition intensifies the binding of calcium hydroxide formed during the hydration of C3S, helps reduce the basicity of the cement-composite, while reducing the growth of portlandite crystals. Limestone particles contribute to the formation of calcium hydrocarbonate and, together with fine ground quartz sand; act as microfiller, clogging the pores of the cement. Furthermore, the results revealed that the effect of fiber addition improves the mechanical properties of FRSCC. It was found that the steel fiber performed better than basalt fiber on tensile strength and modulus of elasticity; however, both fibers have the same performance on the first crack strength and sample destruction of FRSCC. It also illustrates that there will be an optimum percentage of fiber addition.