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고도산화공정인 오존처리에 의한 난분해성 염료 수용액의 분해특성
황세욱,박종환,이수림,엄주현,류성기,최익원,김성헌,강세원,조주식,서동철 한국환경농학회 2020 한국환경농학회지 Vol.39 No.1
BACKGROUND: Most of the researches on the dye removal using ozonation have been focused on the removal efficiency. However, the research on their removal characteristics and mechanism according to the reaction time has been still insufficient. METHODS AND RESULTS: In this study, the effects of initial pH and dye concentration with reaction time on the degradation characteristics of methyl orange (MO) and methylene blue (MB) by ozonation were evaluated. The degradation efficiency of MB by ozonation increased with increasing pH. On the other hand, the degradation efficiency of MO by ozonation did not show a significant difference with varing pH. The both MO and MB by ozonation were decomposed within 30 min irrespective of the dye con-centration, but the decomposition rates of dyes were faster at lower initial dye concentration. The decomposition efficiency of total organic carbon (TOC) in each dye solution by ozonation was low, which was found to be effective for partial decomposition such as decolorization rather than complete degradation of the dye. CONCLUSION: Overall, ozonation was an effective method for removing nondegradable dyes. However, it is necessary to study the optimization of dye degradation under various environmental conditions for ozonation.
방탄소재 적용을 위한 열경화성 수지와 기능성 첨가제의 물성 연구
황세욱,신종섭,이정희,강혜란,이동진,박남규 한국공업화학회 2014 한국공업화학회 연구논문 초록집 Vol.2014 No.1
최근 방탄재의 방탄성능 개선과 함께 경량화에 대한 요구가 증가됨에 따라 경량화, 편의성 및 쾌적성을 향상시키기 위해 고강도 아라미드 섬유가 적용된 고기능 섬유복합재료를 적용하여 방탄재를 개발하는 경향을 나타내고 있다. 현재 세라믹 소재와 아라미드 소재 등에 바인더 수지를 이용하여 접착을 하고 있는 경우가 많으나 방탄성능 향상을 위해 고성능의 바인더 수지 개발이 필요한 시점으로 본 연구개발에서는 기능성 바인더 수지와 PVB, BGPF 및 APS 등의 다양한 첨가제를 아라미드 원단에 적용하였을 때, 수지가 적용된 원단의 강도 향상 및 기존에 사용되어 오던 수지에 비해 우수한 접착 특성을 지니며 고성능 방탄재용 바인더 수지를 개발하고자 하였다.
NS-2 시뮬레이터 기반의 B-MAC과 X-MAC의 성능 비교
황세욱(Hwang Se Wook),이성훈(Lee Sung Hune),이형근(Lee Hyung Keun) 한국통신학회 2009 한국통신학회 학술대회논문집 Vol.2009 No.6
무선 센서 네트워크는 기본적으로 교환이나 충전이 어려운 배터리로 동작하는 센서 노드들로 구성된다. 따라서 센서 노드들의 에너지 소모를 줄이는 MAC 프로토콜과 라우팅 기법이 무선 센서 네트워크에서 중요하다. 본 논문에서는 무선 센서 네트워크에서 에너지 효율적인 측면을 고려하여 제안되어 온 비동기 방식의 저전력 센서 MAC 프로토콜인 B-MAC과 X-MAC을 정리하고 NS-2 시뮬레이터에서 성능을 비교하였다.
김정수,황세욱 한국생산성학회 2000 生産性論集 Vol.14 No.2
This thesis investigates whether and how level of resource explain variation in the persistence of a firm's competitive advantages. In oiler to test our hypotheses, we developed an instrument to measure three attributes of resource ; firm's competency, causal ambiguity and isolating mechanism, and collected data within domestic industry. We found that the competency, causal ambiguity of resource prolongs performance advantages through isolating mechanism and knew that the isolating mechanism is associated with sustain advantages. This study contributes to the strategic management literature by providing evidence on the validity of a core, but largely untested proposition of resource-based theory : that inimitable resources, rather than market entry harries, often explain the persistence of superior financial performance. Our findings both support and qualify the resource-based logic. In addition we begin to resolve a tension that exists between resource-based theory and research on foreign direct investment. Finally, resource-base theory highlights isolating mechanism an particularly attractive source of competitive advantage. Yet isolating mechanism is rarely measured and related to a firm's performance advantage. This study presents a method of measuring isolating mechanism that is directly linked to the performance outcome a firm seeks to compete on.