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프러시안 블루 (PB)의 방사성 세슘 흡착 메커니즘 연구
장성찬,김준영,허윤석,노창현 한국방사선산업학회 2015 방사선산업학회지 Vol.9 No.3
Since the accident at the Fukushima Daiichi power plant, Prussian blue (PB) hasattracted increasing attention as a material for use in decontaminating the environment. Wehave focused the fundamental mechanism of specific Cs+ adsorption into PB in order to develophigh-performance PB-based Cs+ adsorbents. The ability of PB to adsorb Cs varies considerablyaccording to its origin such as what synthesis method was used, and under what conditions the PBwas prepared. It has been commonly accepted that the exclusive abilities of PB to adsorb hydratedCs+ ions are caused by regular lattice spaces surrounded by cyanido-bridged metals. Cs+ ions aretrapped by simple physical adsorption in the regular lattice spaces of PB. Cs+ ions are exclusivelytrapped by chemical adsorption via the hydrophilic lattice defect sites with proton-exchange fromthe coordination water. Prussian blue are believed to hold great promise for the clean-up of 137Cscontaminated water around nuclear facilities and/or after nuclear accidents.
장성찬,권영준,채수빈,최원석 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0
We report on the electromagnetic interference shielding behavior of MWCNT/Carbon black/Graphite nanocomposites fabricated by the rotate milling process to demonstrate the contribution of the process to shielding properties. The carbon hybrid composites showed excellent shielding response, which is majorly governed by absorption losses. The results show that the total EMI shielding effectiveness (SE) value is 32 dB at 0.3~1.5 GHz for carbon hybrid composites at 20 um thickness, dominated by absorption mechanism, which overpowered the 10 dB value of graphene oxide. The presence of carbon materials enhances space charge polarization, multiple scattering and effective anisotropy energies of the carbon hybrid composites, resulting in high electromagnetic shielding effectiveness. The dielectric behavior was evaluated to correlate with the EMI shielding mechanism.
민간항공 부기장 팔로워십 유형에 따른 CRM의 리더십 및 팀워크 스킬 역량 비교
장성찬,이장룡 (사)위기관리이론과실천 2023 Crisisonomy Vol.19 No.11
It has been observed that approximately 70% of aviation accidents are closely linked to human factors within the cockpit crew. To address this critical issue, the aviation industry has implemented CRM as an operational frameork. For the effective execution of CRM, it is vital for pilots to possess 5 non-technical skills. Among these, leadership and teamwork skills are crucial components, and it is not solely reliant on the captain's leadership but also influenced significantly by the quality of followership. Followership can be classified into various types, including pragmatic and exemplary followership, among others. This research hypothesized that these different followership types would have varying impacts on leadership and teamwork skill competency. The experimental results confirmed that the pragmatic followership was more conductive to enhancing leadership and teamwork skill competency compared to the exemplary followership. Furthermore, it was identified that pragmatic followership exhibited a slight tendency towards higher communication skill competencies in comparison to the exemplary followership.
장성찬,강성민,이일송,노창현,허윤석 한국공업화학회 2016 한국공업화학회 연구논문 초록집 Vol.2016 No.1
Radioactive contaminant adsorbents require well-designed morphologies for effective interaction with radioactive species selectively and high structural stability during adsorption. Herein, we demonstrate a pomegranate-like micro-scavenger cage (P-MSC) with high adsorption capacity towards radioactive cesium (<sup>137</sup>Cs). The resulting micro-scavenger cage shows enhancing properties compared to alginate bead gelled by traditional methods using Ca<sup>2+</sup>. The proton-exchange between cesium and P-MSC result in rapid adsorption, within 10 min, with a high removal capacity. The resulting P-MSC has a 236-fold higher distribution coefficient toward cesium than traditional Ca-alginate bead. The maximum cesium removal capacity of the P-MSC is 108.06 mg/g. It is found that the P-MSC have a removal efficiency of 99.24% for radioactive cesium, showing that the material holds great promise for the clean-up of radioactive cesium contaminated seawater around nuclear plants and/or after nuclear accidents.
장성찬 ( Sung-chan Chang ) 한국산업디자이너협회(한국인더스트리얼디자인학회) 2009 산업디자인학연구 Vol.3 No.4
장애인이라는 소외된 계층에 대한 디자인연구 개발은 극히 드물게 진행이 되어 왔다. 2000년도 이후 급속도로 늘어나고 있는 장애인의 수는 선천적인 원인보다는 사고나 질병이 원인이 되는 후천적인 원인이 더 큰 비중을 차지하고 있다. 누구에게나 닥칠 수 있는 장애의 환경을 그들이 보다 편리하고 좋은 환경에서 작업할 수 있는 연구가 필요하다. 본 연구는 소외 계층으로 자리 잡고 있는 장애인들의 작업 환경 개선을 위해서 작업능률 향상을 위하여 그들이 일하는 환경을 현장 방문조사를 기초로 하여 최적의 디자인을 적용하는데 그 목적이 있다. 이러한 목적을 위해 사용자테스트를 통한 심층적인 소비자 조사를 실시하였으며, 우수 제품으로 사용되고있는 다양한 경쟁업체들의 제품을 분석하였다. 더불어 상품의 라이프 스타일과 사용실태조사도 함께 조사되었다. 이후, 디자인 개발목표와 컨셉을 설정하고 20년이상 디자인경력을 가진 디자이너들과 함께 디자인 개발과정에 참여 하여 최종 디자인 결과물을 얻을 수 있었다. Design research and development for the underprivileged called the disabled have been progressed very rarely. The rapidly increasing number of the disabled since year 2000 is mainly due to postnatal reasons by accidents or diseases than congenital reasons. Research to turn environment of disabled that anyone could face into more convenient and better environment where the disabled can work in is required. This study intends to apply the optimum design based on door-to-door survey on environment the disabled are working in to improve working environment and work efficiency of the disabled who are becoming as the underprivileged. For this purpose, an in-depth consumer research was performed on the basis of user test, and the outstanding products of competitors were analyzed. And in relation to such products, lifestyle and actual conditions were analyzed. Afterward, the goal and concept of design was set, and designers who had more than twenty years of experience participated in this project.