Earticle

In this study, it was developed eco-friendly inorganic binding material concrete using ground granulated blast furnace slag and alkali activator(water glass, sodium hydroxides). Also, it was evaluated the flexure capacity of the RC beams using inoganic binding material concrete. The eco-friendly concrete using inorganic binding material encouraged alkali activation reaction has rapid hardening speed and showed possibility as a high strength concrete. Also, the RC beams applied this showed similar movement and destroy tendency with RC used previous cement.

The purpose of this study was to evaluate the structural performance of high strength steel beam-to- column connections. To this end, cycle loading connection test was conducted targeting HSA800 steel being developed in Korea and parameter is connection details. According to the study, The non-scallop detail and improved horizontal rib reinforcement detail used in this study enhanced deformation capacity of high strength steel connections which have brittle tendency by stress relaxation. Also. these details satisfied the requirement specification of Special Moment Frame(SMF) by Korean Building Code.

In this study, experimental research was carried out to evaluate the structural performance of the reinforced concrete beam retrofitted by strengthening methods(embedded CFRP rod of hexagon, metal fittings) in existing reinforced concrete buildings. Test results showed that the maximum load carrying capacity of retrofitted specimens(BCR3, BCR3- AC1, BCR3-AC2) were increased by 38%, 63%, and 74% respectively in comparison with the standard specimen BSS.

In this study, the eco-friendly concrete using geopolymer encouraged alkali activation reaction has rapid hardening speed and showed possibility as a high strength concrete. Also, the RC beams applied this showed similar movement and destroy tendency with RC used previous cement. It is thought that eco-friendly geopolymer concrete can be used in construction material and subject matter as a basic research to replace cement concrete and if there is application to structure subject matter in PC form as well as production of 2nd concrete product can improve the productivity, concrete for reduction and more of efficiency.

In this study, experimental research was carried out to evaluate the structural performance of the reinforced concrete beam retrofitted by strengthening methods(embedded CFRP rod of hexagon, metal fittings) in existing reinforced concrete buildings. Test results showed that the maximum load carrying capacity of retrofitted specimens(BCR2-AC2, BCR3-AC2) were increased by 53% and 74% respectively in comparison with the standard specimen BSS.

본 연구는 표준실험체(BSS), 강판 보강 실험체(BS30), 탄소섬유판 보강 실험체(BCPF, BCPK), 탄소섬유쉬트 보강 실험체(BCFS), 매입형 FRP봉 보강 실험체(BCR 시리즈)로 총 8개의 실험체를 실물크기의 1/2로 축소 제작하여 단조하중을 주어 실험하였다. 실험을 통하여 얻어진 결과를 비교분석하여 하중-변위, 파괴형태, 최대내력, 연성능력 등을 규명함으로써 구조성능의 개선정도를 평가하였다. 실험결과, 매입형 FRP봉 보강 실험체(BCR 시리즈)의 경우 표준실험체(BSS)보다 최대내력은 21~55%, 연성능력은 1.23배 증가하는 결과를 나타내었다. 또한, 부착슬립, 피복분리 형태로 파괴되었지만, 다른 보강재료 보다 연성적인 거동을 나타내었다.

In this study, seven R/C beams, retrofitted steel plate(BS30), carbon fiber plate(BCPF, BCPK), carbon fiber sheet(BCFS), embedded FRP rod(BCR series), and standard specimen(BSS) were constructed and tested under monotonic loading. Experimental programs were carried out to improve and evaluate the structural performance of such test specimens, such as the load-displacement, the failure mode, the maximum strength, and the ductility capacity. All the specimens were modeled in one-half scale size. Test results showed that test specimens, embedded FRP rod(BCR series) were increased the maximum load carrying capacity by 21~55%, and the ductility capacity by 1.23 times in comparison with the standard specimen BSS. And test specimens BCR series were failed with the adhesion slip and concrete cover separation. But it showed enough ductile behavior.

In this study, experimental research was carried out to improve the structural performance of high-strength reinforced concrete interior beam-column joints using advanced intermediate reinforcement and closed stirrup. Test result shows that retrofitting specimens(IJIR, IJIRCS) designed by the improvement of structural performance and ductility using advanced intermediate reinforcement and closed stirrup could attained more maximum load-carrying capacities and stable hysteretic behavior. The maximum load-carrying capacities of each specimens were increased 1.3～1.32 times in comparison with standard specimen.

In this stydy, experimental research was carried out the hysteretic behavior of reinforced concrete haunched beams such as application with or without slab and shear reinforcement ratio. Test results showed that test specimens(FTH-i Series) was increased respectively the maximum load carrying capacity by 1.13～1.14 times in comparison with the standard specimens(FTH). And the specimens(FTH-i Series) showed the stable hysteresis behavior.

본 연구에서는 기존 철근콘크리트 건축물의 구조성능 개선을 위하여 표면요철 매입형 CFRP봉과 CFRP시트를 사용한 철근콘크리트 보의 구조성능을 평가하기 위하여 실험을 수행하였다. 표면요철 매입형 CFRP봉의 사용량, CFRP시트 보강 유무에 따라 총 8개의 실험체를 제작하고 실험을 수행하여 구조성능을 평가하였으며, 본 연구의 실험결과를 근거로 다음과 같은 결론을 얻었다. 표면요철 매입형 CFRP봉 보강 실험체 BER 시리즈의 경우, 표준실험체 BSS와 비교하여 12%~46% 내력이 증가하였고, 표면요철 매입형 CFRP봉과 CFRP시트의 보강방법에 따라 보강한 실험체 BER시리즈는 표준실험체 BSS보다 최대내력이 각 각 12~46%, 17%~67% 증가하였다. 그리고 표면요철 매입형 CFRP봉으로 보강된 실험체 NER 시리즈는 부착슬립, 피복분리 형태로 파괴되었으나, 표면요철 매입형 FRP봉과 CFRP시트를 보강한 실험체 BERB 및 BERA 시리즈는 CFRP시트를 부분 및 전면보강에 따른 콘크리트 구속효과 및 모재와 표면요철 매입형 CFRP봉의 부착강도 증가로 인하여 부착슬립의 형태로 파괴되었다.

In this study, experimental research was carried out to evaluate the structural performance of the reinforced concrete beam using retrofitting two materials(groove and embedded CFRP rod, CFRP sheet(fully or partial retrofitting) in existing reinforced concrete buildings. Eight reinforced concrete beams, retrofitted embedded CFRP rod(BER1, BER2) and embedded CFRP rod with CFRP sheet(BERB series, BERA series), and standard specimen(BSS) were constructed and tested under monotonic loading. Design parameters of test specimens are the amount of embedded CFRP rod and fittings method of CFRP sheet. Test results showed that the maximum load carrying capacity of specimens, embedded CFRP rod with CFRP sheet(BER series), were increased the by 12~22% and 36∼67% respectively in comparison with the standard specimen BSS. Test specimens BER series were failed with the adhesion slip and concrete cover separation. And test specimens BERB series, BERA series were failed with the adhesion slip due to the confining effect of CFRP sheets.

본 연구의 목적은 하이브리드 FRP(Fiber Reinforced Polymer) 플레이트로 보강된 철근 콘크리트 보의 휨 보강 효과를 파악하기 위한 것이다. 본 연구에 사용된 하이브리드 FRP 플레이트는 아라미드섬유와 유리섬유를 1:9로 혼합하고, 섬유와 에폭시를 7:3으로 혼합하여 제작한 보강재이다. 탄소 FRP 플레이트 또는 탄소섬유가 포함되어 있는 하이브리드 FRP 플레이트는 기존의 기하철 구조물이나 한국전기공사와 같이 전기를 사용하는 구조물을 보강하는데 한계가 있다. 그러나, 아라미드섬유와 유리섬유를 혼합한 하이브리드 FRP 플레이트는 비전도성이기 때문에 전기를 사용하는 구조물을 보강하는데 제한이 없다. 또한, 아라미드섬유와 유리섬유를 혼합하여 제작한 하이브리드 FRP 플레이트는 경제성 및 구조성능 측면에서 기존에 사용되어 온 FRP 플레이트보다 우수하다. 하이브리드 FRP 플레이트로 보강된 휨 부재의 휨 성능효과를 파악하기 위하여 7개의 제작하였다. FRP 플레이트 종류, 앵커형태, 그리고 에폭시 유무 등을 주요 실험변수로 하였다. 실험결과, FRP 플레이트로 보강한 모든 실험체가 보강하지 않은 실험체보다 우수한 구조성능을 나타내었고, 기존에 사용되어 온 FRP 플레이트로 보강한 실험체에 비해 아라미드섬유와 유리섬유를 혼합한 하이브리드 FRP 플레이트로 보강한 실험체가 우수한 휨성능을 나타내었다.

The objective of this study is to understand the flexural strengthening effects of RC beam reinforced hybrid FRP(Fiber Reinforced Polymer) plate. The hybrid FRP plate used this study was the strengthening material with mixing Aramid fiber sheet and Glass fiber sheet in the rate of one to nine, and the amount of resin included the FRP plate is about 30%. Carbon FRP plate or hybrid FRP plate included Carbon fiber sheet is limited to strengthening the structures using electricity such as established subway structures or Korea Electric Power Corporation. However, the range of field application of the hybrid FRP plate mixed Aramid fiber sheet and Glass fiber sheet was not limited because they are non-conductor, In addition, the hybrid FRP plate mixed Aramid and Glass fiber is superior to existing FRP plate in respects of the economics and structural performance. The beams of seven specimens were planned to comprehend the flexural strengthening effects for flexural beams reinforced hybrid FRP plate. Test variables are the types of FRP plate, the form of anchor, and resin. As the results of this study, All specimens reinforced by the FRP plate have a good structural behavior compared with the standard specimen which did not strengthening especially, the specimens with the hybrid FRP plate mixed Glass and Aramid fiber sheet have the higher structural performance than those of existing FRP plate.

This paper presents an analyse study on structural performances of the high-strength steel material with low yield ratios, which has been developed recently by modern steel-making technology in Japan(so called, 60kg class high performance steel). The purpose of this study was to analyze the structural performance according to the low-yield-steel members of high strength steel and to predict the probability of upward movements and its applications in Korea.

It is the purpose of this study to evaluate the structural performance of steel pipe splice for SD500 high-strength reinforcing bar, through a cyclic loading test. The experimental variables adopted in this study include the development length of rebar, the type of sleeve, and size of reinforcing bar, among others. The results of this study showed that the developed steel pipe splice system for SD500 high-strength reinforcing bar, retained the structural performance required in domestic, ACI and AIJ code. It is considered that the study result presented in this paper can be helpful in developing a reasonable design method for a steel pipe splice system for SD500 high-strength reinforcing bar.

Achievement emotions significantly influence students' well-being, learning quality, and academic performance. This study addresses the overlooked achievement emotions in nursing by investigating their relationship with mindfulness and academic performance, with an emphasis on the mediating effects of achievement emotions. This study employed a cross-sectional design involving 203 nursing students in a university in C province. Participants responded to a survey designed to assess their level of mindfulness, achievement emotions, and academic performance. Structural relationships among mindfulness, achievement emotions, and academic performance were tested using data-driven and computational analyses, including structural equation modeling (SEM) with Mplus 8. In addition, path analysis with bootstrapping was conducted to validate the hypothesized pathways and to examine the mediating effects of achievement emotions. Mindfulness was positively related to positive achievement emotions and negatively related to negative achievement emotions. While positive achievement emotions enhanced academic performance, negative achievement emotions had an adverse effect. However, mindfulness did not directly influence academic performance. Notably, achievement emotions served as a complete mediator in the association between mindfulness and academic performance. The results suggest that mindfulness benefits nursing students' academic performance by amplifying positive achievement emotions and diminishing negative ones. The mediation effect highlights the importance of achievement emotions in nursing education, highlighting the necessity of educational programs that enhance students' emotional experiences. These findings can serve as a crucial foundation for designing initiatives fostering mindfulness, achievement emotions, and effective learning among nursing students.

Purpose: This study aimed to construct and test the structural relationships between self efficacy and clinical performance among undergraduate nursing students. The model was based on Bandura’s self efficacy theory and a review of previous studies. The hypothesized model included emotional intelligence as a personal factor, self efficacy as self efficacy beliefs, problem solving ability as a skill, and clinical performance as a performance. Methods: Data were collected from June 23 to August 11, 2014 using structured questionnaires. The study sample was 205 senior nursing students. Data were analyzed using SPSS/WIN 21.0 and AMOS 21.0 programs. Results: The hypothesized model was shown to be x²=183.186 (dF=118), Goodness-of- Fit Index (GFI)=.91, Normed Fit Index (NFI)=.91, Comparative Fit Index (CFI)=.96, and Root Mean Squared Error of Approximation (RMSEA)=.05. Self efficacy (β=.29 p=.033) and problem solving ability (β=.42 p=.007) had a direct effect on the clinical performance. Furthermore, self efficacy had mediating effect on the relationship between emotional intelligence and clinical performance. Conclusion: These findings provide that when developing nursing curriculum and intervention programs, self efficacy and problem solving ability should be considered as key factors facilitating the clinical performance of nursing students. Moreover, consideration should be given to the indirect effects of emotional intelligence subscales on clinical performance via self efficacy and problem solving ability.

본 연구는 경상남도 소방공무원들을 대상으로 소방행정조직의 사회적 자본이 지식공유에 미치는 영향력과 이러한 지식공유가 소방행정서비스 성과에 미치는 영향을 검정하였다. 본 연구의 분석결 과는 다음과 같다. 첫째, 관계적 사회적 자본을 제외하고 구조적 사회적 자본과 인지적 사회적 자본 은 정보공유에 통계적으로 유의미한 영향을 미치는 것으로 조사되었다. 즉 구성원간의 공동목표 인식과 비전공유 및 조직공유문화에 대한 이해도가 높을수록 구성원들 간의 정보공유는 촉진되는 것으로 나타났다. 그러나 관계적 사회적 자본은 구성원 간의 정보공유를 높이지 못하는 것으로 나타 났다. 둘째, 소방행정서비스 성과는 구조적 사회적 자본을 활성화하여 정보공유를 극대화할 때 향상 될 수 있음을 확인하였다. 본 연구는 다음과 같은 한계점을 가진다. 횡단면적 방법을 사용하였으나 소방행정서비스 성과는 시간이 지남에 따라 바뀔 수 있음으로 향후 연구는 종단적 연구를 통해 소방 행정서비스 성과를 검증하는 것이 중요하다. 그리고 조직문화가 다를 경우 서비스성과에 미치는 영향도 다를 수 있다는 점이다.

The purpose of this study is to investigate the effect of social capital on knowledge sharing and the effect of knowledge sharing on the service performance of fire service administration. The structural relationship among those variables were analyzed based on the data collected from fire service officers in Gyeongnam province in South Korea. This study categorized social capital into three dimensions: structural, cognitive and relational. The results of this study are as follows. Both structural social capital and cognitive social capital have a statistically significant effect on information sharing, while the effect of relational social capital is not significant. This finding implies that, the higher level of understanding of common goal, vision sharing and organizational sharing culture among members, the more information sharing among members is promoted. However, relational social capital does not increase information sharing among members. It is also confirmed that fire service performance can be improved when information sharing is maximized by facilitating structural social capital. Further studies should address temporal patterns of their service performance and different effects by different organizational culture.

목적: 본 연구는 네일 아티스트의 성장 마인드셋, 직무소진, 직무성과 간의 구조적 관계를 파악하여 미용 서비스의 제공자 측면에서 서비스 품질을 향상시킬 수 있는 방안을 모색하고자 하였다. 방법: 서울 및 경기권에 위치한 네일 샵 운영인, 혹은 네일 아티스트로 근무하고 있는 성인남녀 194명을 표본 집단으로 설정하여 2023년 1월 1일부터 15일까지의 15일간 온라인 링크 기반 설문을 통해 자료를 수집하고, SPSS 28.0 및 AMOS 28.0을 활용하여 수집된 자료에 대한 구조방정식모형에 따른 경로분석을 시행하였다결. 과: 첫째, 네일 아티스트들의 성장 마인드셋 중 지능 마인드셋은 직무소진에 대해 유의한 부(-)의 영향을 미치고, 직무성과에 유의한 정 (+)의 영향을 미치는 것으로 나타났다. 둘째, 성격 마인드셋은 각 직무소진과 직무성과에 유의한 영향을 미치지 않는 것으로 나타났 다. 마지막으로, 네일 아티스트들의 직무소진은 직무성과에 유의한 부(-)의 영향을 미치는 것으로 나타났다. 결론: 네일 아티스트 들의 지능 마인드셋을 향상시켜줄 수 있는 교육적 차원의 제도적 지원이 필요하다. 또한, 서비스 제공자 관점에서의 서비스 질 향상 을 위한 후속연구들이 다수 수행될 필요성이 있다.

Purpose: This study aimed to determine ways for improving the service quality of beauty service providers by understanding the structural relationship between the growth mindset, burnout, and job performance of nail artists. Methods: The sample groups comprised 194 adult men and women working as nail shop operators or nail artists in Seoul and Gyeonggi provinces, and data were collected via an online web-based survey over 15 days from January 1 to 15, 2023. Path analysis was conducted using SPSS 28.0 and AMOS 28.0 according to the structural equation model for the collected data. Results: First, in the growth mindset of nail artists, the intelligent mindset was found to have a significantly negative (−) effect on burnout and a significantly positive (+) effect on job performance. Second, the personality mindset had no significant effect on either burnout or job performance. Finally, burnout had a significantly negative (−) effect on the job performance of nail artists. Conclusion: Educational institutions must provide support to improve the intelligent mindset of nail artists. Further follow-up studies are necessary to enhance the quality of service from the perspective of service providers.

目的: 本研究旨在通过了解美甲师的成长心态、职业倦怠和工作绩效之间的结构关系，确定美容服务方面提高服 务质量的方案。方法: 样本组由首尔和京畿道从事美甲店经营者或美甲师的 194 名成年男性和女性组成，通过 在线网络调查收集数据，时间为2023年1月1日至15日，历时15天。使用SPSS 28.0和AMOS 28.0对收集的数据 进行结构方程模型分析。结果: 首先，在美甲师的成长心态中，发现聪明心态对职业倦怠有显着的负面（-）影 响，对工作绩效有显着的正面（+）影响。其次，人格心态对倦怠或工作绩效没有显着影响。最后，职业倦怠对 美甲师的工作表现有显着的负面（-）影响。结论: 教育机构必须提供支持，以提高美甲师的智力思维。还需要 进一步的后续研究，从服务提供者的角度提升服务质量。

본 연구는 중국 은행산업의 환경-전략-구조 패러다임에 관한 연구로서 내부고객(종업원)의 디지털 전환 역량이 조직성과와 동태적 능력에 미치는 직접효과와 내부 마케팅과 조직성과 간 관계의 조절효과를 비교 고찰하였으며, 내부 마케팅이 조직성과에 미치는 영향 과 동태적 능력이 조직성과와 기업성과에 미치는 영향 및 디지털 전환 역량과 조직성과 간 관계의 조절효과를 연구하였다. 또한 조직 성과가 기업성과에 미치는 영향과 불확실성이 기업성과에 미치는 영향을 고찰하였으며, 이를 통해 은행산업의 환경-전략-구조 관계 및 디지털 전환 역량 지표 개발 등을 연구함에 있어 학술적 계기를 제공하고자 하였다. 특히 디지털 전환 역량을 디지털 비즈니스, 운영 프로세스, 디지털 조직구조로 세분화하고 이에 대한 측정 지표를 제시하였으며, 디 지털 전환 역량과 동태적 능력의 직접효과와 간접효과 및 내부마케팅과 조직성과, 불확실성의 기업성과에 미치는 영향을 연구하였다. 분석방법으로는 중국은행의 내부 종업원 526명에게 온라인으로 설문자료를 수집하여 PLS 구조방정식모형으로 분석하였다. 분석결 과 디지털 전환 역량은 동태적 능력에 양(+)의 영향을 미치나 조직성과에는 내부 마케팅과의 관계에서 조절효과로써 그 구성요소 중 운영 프로세스와 디지털 조직구조만 강화된 조절효과를 보였다. 또한 동태적 능력은 디지털 전환 역량과 조직성과 간 강한 조절효과로 써 영향을 미치고, 조직성과와 기업성과에도 양(+)의 영향을 미쳤다. 아울러 내부마케팅과 불확실성 및 조직성과는 각각 조직성과와 기업성과에 양(+)의 영향을 미치는 것으로 나타났다. 이러한 분석결과를 바탕으로 은행은 디지털 기술의 유연한 사용과 대응, 디지털 전환 전략 수립 및 비즈니스의 재창조 등 디지털 전 환 역량을 강화해야 한다. 또한 급변하는 환경의 불확실성에 대비하고 적극 대처하여 새로운 가치 창출이 가능해야 하고, 시장의 기회 와 위험을 지속적으로 탐색하며 상황에 적절하게 조직을 변화하고 재배치할 수 있는 능력을 배양해야 할 것이다.

This study is on the environment-strategy-structure paradigm of the Chinese banking industry, which examines the direct effect of digital transformation capabilities of internal customers(employees) on organizational performance and dynamic capabilities, and its moderating effect on the relationship between internal marketing and organizational performance. It also reviewed the effect of internal marketing on organizational performance, the effect of dynamic capability on organizational performance and corporate performance, and their moderating effects on the relationship between digital transformation capability and organizational performance. In addition, the impact of organizational performance on corporate performance and the impact of uncertainty on corporate performance were considered. As an analysis method, questionnaire data was collected online from 526 internal employees of Chinese banks and analyzed using the PLS structural equation model. As a result of the analysis, the digital transformation capability has a positive(+) effect on the dynamic capability, but only the operational process and digital organizational structure showed a strengthened moderating effect on the relationship between internal marketing and organizational performance. Dynamic capability has a strong moderating effect on the relationship between digital transformation capability and organizational performance, and has a positive(+) effect on organizational performance and corporate performance. In addition, it was found that internal marketing, uncertainty, and organizational performance had a positive(+) effect on organizational performance and corporate performance, respectively. Based on these analysis results, it can be concluded that banks need to strengthen their digital transformation capabilities, such as flexible use of and response to digital technologies, establishment of digital transformation strategies, and business reinvention. In addition, it is necessary to be able to create new value by preparing for and actively responding to the uncertainty derived from the rapidly changing environment. Banks also need to continuously explore market opportunities and monitor risks, and cultivate the ability to change and relocate the organization appropriately to the situation.