국내 고속도로의 콘크리트 포장은 줄눈 콘크리트 포장 공법을 주로 적용해 왔으나 잦은 줄눈부 파손으로 인해 최근에는 공용성이 우수한 연속철근 콘크리트 포장(CRCP)을 확대 적용하고 있는 추세이다. CRCP는 우수한 공용성을 가지고 있지만 다량의 철근 사용으 로 인해 초기 시공비가 높은 단점이 있다. 이러한 CRCP의 단점을 보완하고 공용성을 보다 향상시키기 위해 신개념 철근콘크리트 포 장(ARCP)이 개발되었다. 본 연구에서는 ARCP의 공용성 검증을 위해 고속도로 제14호선 함양~울산 구간에 시공된 ARCP와 동일한 구 간에 시공된 CRCP의 균열조사를 수행하였으며 균열형상 및 균열간격 등을 비교 분석하였다. 분석 결과 ARCP에서 발생한 균열은 CRCP와 비교하여 대부분 직선 형상으로 발생하였으며 균열간격도 보다 균일한 것을 확인하였다. 또한, ARCP에서는 좁은 균열간격, 지그재그 균열, 분리균열 등 부적절한 균열의 발생이 매우 적은 것을 확인하였다. 따라서 ARCP의 균열형상 분석 결과로 보아 ARCP 는 CRCP의 우수한 공용성을 보다 향상시킬 수 있는 공법이라는 것을 검증하였다.

The purpose of this study was to determine the effect of simulation-based Korea advanced life support training on new nurses' knowledge, clinical performance ability, performer confidence, and learning satisfaction. Methods: This is a non-equivalent controlled pre-post quasi-experimental study. A simulation-based CPR training program was applied to 37 new nurses. Results: The experimental group scored lower on emergency management knowledge (83.65±7.61) than the control group (84.55±9.22), which was not significant (t=-4.46, p=.657). However, the clinical performance ability score was significantly higher in the experimental group (109.59±9.98) than in the control group (100.24±11.87) (t=3.581, p <.001). Performer confidence was significantly higher in the experimental group (23.43±3.29) than in the control group (19.90±3.85) (t=3.69, p〈.001). In addition, the learning satisfaction score of the experimental group (96.16±5.64) was significantly higher than the control group (88.42±11.13) (t=3.72, p< .001). Conclusion: This study confirmed that simulation training is an efficient way to improve new nurses' clinical performance ability, and performer confidence. Therefore, applying simulation training in scenarios can improve new nurses' work competence and contribute to improving the quality of patient care.

Polypyrrole (PPy) decorated on reduced graphene oxide (rGO) films is successfully prepared with pyrrole (Py) monomers and rGO through one-step combining oxidation with polymerization reaction. Compared with the pure individual components, rGO/PPy compound turns out better electrochemical characteristics owing to the introduction of rGO sheets, which improves the specific surface area and the conductivity of composite material. When the amount of rGO is 10% of the total, the rGO/PPy compound delivers the best capacitance of 389.3 F g−1 at 1.0 A g−1 in a three-electrode system and 266.8 F g−1 at 0.25 A g−1 in the symmetric supercapacitor system. In addition, asymmetric device (rGO/PPy//AC) has been successfully fabricated using optimized rGO/PPy compound as positive electrode, activated carbon as negative electrode (AC) and 1 M Na2SO4 aqueous solution as electrolyte. The device obtains long cycle stability under the high-voltage region from 0 to 1.6 V, meanwhile displaying the satisfied energy density of 19.7 Wh kg−1 at 478.1 W kg−1. Besides, the rGO/PPy//AC device presents satisfactory rate capability and long life time.

Membrane-based separations provide significant advantages over the conventional thermally-driven separation process such as distillation since they require small footprints as well as less energy.1[] Polymeric membranes, most widely used for a variety of industrial gas separations, suffer from the limitation of separation performance, so-called the upper-bound limit due to their inherent drawbacks.2[] This presentation will introduce advanced membranes including mixed matrix membranes and ladder-structured polysilsesquioxanes, recently developed in our group to overcome the current limit of the separation performance of polymeric membranes.

The performance of composite safety barriers is evaluated through computer simulation. A composite safety barrier of SB4 grade is modeled. The MAT58 material model provided by LS-DYNA software is used to model composite material. The composite safety barrier satisfies strength and deformation limit values. The barrier also satisfies THIV and PHD limit values of passenger protection performance.

기존교량의 내진보강 우선순위 결정방법은 교량을 지진도 그룹으로 분류한 후 교량의 취약도 및 영향도를 고려하여 4개의 내진그룹으로 분류된다. 그러나, 현재 사용되고 있는 내진보강 우선순위 결정방법을 442개의 국도상 기존교량에 적용한 결과 비합리적인 부분이 조사되었다. 지진도를 정량화하여 좀 더 세분화할 필요가 있고, 연속경간장이 긴 PSC 박스거더교량의 취약도가 과소평가되는 모순점을 개선할 필요가 있었으며, 영향도 수준 또한 취약도 수준으로 증가시킬 필요가 있었다. 본 연구에서는 기존 교량의 조사 결과를 근거로 기존 평가기법을 수정 보완하여 개선된 내진보강 우선순위 결정방법을 제안하였다.

High Energy Milling (HEM) is applied for the grinding of cement and this can lead to substantial refinement (<2μm) and mechanically activation of the powder particles. The present paper reviews the preliminary studies, explains the novel technique and suggests the route into commercial application. Particular attention is paid to wear results with an applied unit where no substantial wear was found after 4000 h of operation.

The aim of the present study was to investigate the impact of two task-processing conditions (10 minutes of pre-task planning time and content familiarity of the task) on spoken performance in terms of the fluency, complexity, and accuracy in a narrative task. The subjects were 20 Korean undergraduate students with a high language proficiency. The results of the two-way interaction effect between the planning and familiarity of the MANOVA were significant in terms of pause length. The univariate test of familiarity in an unfamiliar condition for subordinate clauses in the MANOVA test was significant. The study also found a trade-off effect between complexity and accuracy in terms of the effects of planning time in planned and unfamiliar conditions. These results suggest that the performance of learners could be varied depending on the different combinations of task-processing conditions even in a single narrative task.