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- 저자 : 안용준 ( An Yong Jun ) (검색결과 31 건)
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전기로(電氣爐) 환원(還元) 슬래그의 수화반응(水和反應) 특성(特性) 연구(硏究)
안용준,한인규,최재석,배광현,김형석,An, Yong-Jun,Han, In-Kyu,Choi, Jae-Seok,Bae, Kwang-Hyun,Kim, Hyung-Seok 한국자원리싸이클링학회 2010 資源 리싸이클링 Vol.19 No.6
본 연구에서는 전기로 환원슬래그를 시멘트 혼화재로 이용하였을 때의 전기로 환원슬래그의 수화반응 특성과 압축강도 특성을 연구하였다. 전기로 환원슬래그에는 17.1%의 f-CaO 및 속경성 클링커 광물인 37.1%의 $C_{11}A_7CaF_2$와 21.0%의 $Ca_3A$가 함유되어 있었다. 보통 포틀랜드시멘트(OPC, Ordinary Portland Cement)에 전기로 환원슬래그를 30%까지 치환할 경우, 초결 및 종결시간이 각각 305분과 425분에서 10분과 30분으로 단축되는 급결성을 보였다. OPC에 전기로 환원슬래그의 치환량이 7%까지 증가됨에 따라 혼합시멘트의 압축강도는 OPC보다 높아졌으나, 7%이상에서는 점차 압축강도가 낮아져 20%이상 치환하였을 때에는 OPC보다 초기강도 및 장기강도가 모두 낮았다. 전기로 환원슬래그 자체의 수화반응 생성물을 조사한 결과, $C _{11}A_7CaF_2$는 물과 반응하여 $C_3AH_6$로 변화되었다. 그러나 OPC에 환원슬래그를 치환하여 사용할 경우, 환원슬래그의 치환율이 높아짐에 따라 f-CaO가 많아지고 준안정성의 수화물인 $C_4AH_{13}$의 생성량이 증가되기 때문에 OPC에 환원슬래그를 7%미만으로 치환하여 사용해야만 안정된 경화체를 형성하여 압축강도가 OPC보다 높아졌다. In this study, we have studied hydration properties and compressive strength of the electric arc furnace reduction slag as a cement admixture. The reduction slag is mainly consisted of 17.1% of f-CaO and rapid curing clinker minerals, 37.1% of $C_{11}A_7CaF_2$, and 21.0% of $C_3A$. When the substitution rate of the slag on OPC was 30%, the initial setting time and final setting time has been shortened from 305 min. and 425 min. to 10min. and 30min. When the substitution rate of the slag on OPC was 7%, the compressive strength of mixed cement mortars has been increased than that of OPC during all period. When the substitution rate of the slag on OPC was over 20%, the compressive strength of mortars has been reduced than that of OPC at initial and final compressive strength. As a result of hydration properties of reduction slag, $C_{11}A_7CaF_2$ transfer to $C_3AH_6$ but as the substitution rate of slag on OPC increases, increased f-CaO and the metastable hydrates $C_4AH_{13}$ increased. Therefore, we should control the substitution rate of the slag on OPC was under 7% in order to use EAF reduction slag as a cement admixture.
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안용준(Ahn, Yong Jun),이태구(Lee, Tae Gu),정유연(Jeong, Yu Yeon),손모아(Son, Mo A),유병주(Yu, Byeong Ju) 동국대학교 영상문화콘텐츠연구원 2017 영상문화콘텐츠연구 Vol.12 No.-
최근 방탄헬멧은 탄도 뿐 만 아니라 파편, 폭발, 열, 소음에 대한 방호, 그리고 병사에게 개인 지급되는 야시장비, 통신장비, 감시장비 등을 단일시스템으로 통합하는 전투헬멧을 요구하고 있는 상황이다. 특히 특수부대 헬멧의 경우 전량 수입에 의존하고 있으며 한국인의 두형이 전혀 고려되지 않은 현실이다. 본 연구는 신세대 장병의 두형을 고려하고, 기존 한국군 방탄헬멧에 비해 착용 편의성 및 전투 운용성이 향상된 방탄헬멧의 디자인을 제안하였다. 첫째, 현 방탄헬멧의 성능 및 신세대 장병의 두형변화에 따른 문제점을 인식하여 머리사이즈를 분석하였다. 둘째, 국내외 헬멧을 비교 분석하고, 새로운 방탄 헬멧에 적용할 디자인 요소를 파악하였다. 셋째, 한국인의 두형측정 데이터를 검토하여 이상적인 헬멧 사이즈를 설정하여방탄헬멧 디자인 이미지를 창출한다. 넷째, 인체공학적 헬멧 형상을 설계하고 다양한 개인장비를 확장할 수 있도록 디자인 하였다. 이상의 연구를 토대로 신세대 장병의 두상을 고려한 인체공학적 헬멧 디자인 개발을 제시하였다. 본 연구를 통해 방탄소재 개발 및 방호성능 확보기술을 발전시키고 방탄산업에 기여하며 향후 방탄헬멧 이외에도 다양한 안전헬멧 분야에 접목시켜 새로운 제품을 개발하고 발전을 가져올 수 있을 것으로 생각된다. Recently, bulletproof helmets are demanding combat helmets that integrate not only protection against trajectory, fragments, explosions, fire and noise but also a single soldier"s night-visions, signal equipment, monitoring device into a single system. Especially, special force"s helmets depend on imports, and Koreans head size are not considered at all. This study provides a standard for Korean soldiers " heads. Furthermore, it proposes a bulletproof helmet design that improves protection performance, durability, convenience and combat capability to fit the military"s mission. First, we felt the performance of the bulletproof helmets and the acknowledge of the head size changes, and analyzed the size of the head. Second, we analyzed domestic and international helmets and identified design elements for new helmets. Third, we review the Korean head measurement data to set up an ideal helmet size and create a bulletproof helmet designed. Fourth, we designed ergonomic helmets and designed to expand various personal equipment. Based on the above research, we proposed the development of ergonomic helmets designed for the head of the new generation.
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e-Learning 콘텐츠의 캐릭터 Type에 관한 연구
안용준(Ahn, Yong-Jun),이태구(Lee, Tae-Gu) 인제대학교 디자인연구소 2011 Journal of Integrated Design Research (JIDR) Vol.10 No.2
정보통신기술의 발달로 교육에서도 많은 종류의 e-Learning 학습이 개발되고 있다. 유아나 초등학생용으로는 에듀테인먼트 콘텐츠가 활발하게 제작, 연구되어 오고 있지만 성인대상 e-Learning에서는 에듀테인먼트 요소가 드물게 사용되고 있다. 현재 성인대상 e-Learning에서 가장 많이 적용되고 있는 에듀테인먼트 요소 중의 하나는 캐릭터를 활용하는 것이다. 따라서 본 연구에서는 e-Learning 콘텐츠 제작시 어떠한 Type의 캐릭터가 많이 사용되는지를 조사하여 일반 캐릭터 Type과 비교 분석해 보았다. 실사나 Real Type 보다는 흔히 아동용 애니메이션에서 볼 수 있는 2~4등신 정도의 귀엽고 친근한 캐릭터 사용이 많았으며 복장은 깔끔한 정장과 캐주얼정장 Type을 그리고 캐릭터의 종류는 실사나 카툰보다는 일러스트 Type이 많은 것으로 조사되었다. e-Learning에 사용되는 캐릭터의 기능적인 측면을 고려하여 학습자에게 적당한 캐릭터가 개발되고 다양한 학습콘텐츠의 캐릭터 연구에 참고가 되었으면 한다. Thanks to IT technology, many different kinds of e-Learning method have been developed for education. While ‘Edu-tainment’ contents for children and elementary school students have been made and researched lively, adult-oriented ‘Edu-tainment’ elements have been rarely used. Recently, one of the most useful ‘Edu-tainment’ elements in e-Learning for adult-oriented is the method of using characters. The main purpose of this study was to investigate e-Learning characters, which are mostly used and compare them with general type of characters. As a consequence of the study, I have concluded that even the adult using adult-oriented contents has a preference for cute and intimate small characters, which are generally shown in the kid animation film than real picture characters. Furthermore, I have also found that the adult prefers a neat and casual suit type of costume characters. Finally, the study shows that the adult prefers an illustration type of characters to a real picture or a cartoon type of characters. Regarding the functional side of characters used for e-Learning, I hope this study helps to invent suitable characters for an adult learner and research for characters of various learning contents.
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비만과 정상체중여성들의 저주파치료기(Slim line)에 의한 체지방율 평가(1)
안용준(An Yong Jun),김학렬(Kim Hag Lyeol),손연희(Son Yeon Hui),박성률(Park Seong Lyul),최옥경(Choe Og Gyeong),김영란(Kim Yeong Lan) 한국사회체육학회 2003 한국사회체육학회지 Vol.20 No.2
The purpose of this study was to estimated a reliability and a validity of SLIM LINE(Bionixs Co.Korea) as comparison to %body fat difference between bioelectrical impedance analysis(BIA), Skinfold caliper technique(SCT) and slim line measurement (SLM) in obesity and non-obesity women. The results and conclusion is obtained as follows 1. Percent fat of obesity group by three measurement technique was shown a significant difference between SCT vs. BIA, SLM(p<.001) in pre and after 1 month treatment, but no significant difference between BIA vs. SLM. Also, It was shown a significant difference between SCT vs. BIA after 2 month(p<.001), 3 month(p<.05) and 4 month(p<.05), but no significant difference between SCT vs. SLM and BIA vs. SLM. Percent fat of normal group was present a significant difference between BIA vs. SLM(p<.05) only pre treatment, but no significant difference between the other treatment 2. Fat mass of obesity group by three measurement technique was shown a significant difference between SCT vs. SLM(p<.01) in pre and after 1 month treatment, but no significant difference between SCT vs. BIA and SLM vs. BIA. Also, It was not shown a significant difference between three measurement technique after 2 month and 3 month, but it was significant difference between BIA vs. SLM(p<.05) after 4 month treatment. Fat mass of normal group was not present a significant difference between three measurement technique in pre and after 1 month treatment, but it was shown a significant difference between BIA, SCT vs. SLM after 2 month(p<.01), after 3 month(p<.001) and after 4 month(p<.001) treatment. However, no significant difference between BIA and SCT. 3. Fat free mass of obesity group by three measurement technique was not shown a significant difference in pre, after 2 month and 3 month treatment, but it was shown a significant difference between SCT vs. SLM after 1 month(p<.05) and 4 month(p<.05). However, no significant difference between BIA and SLM. Fat free mass of normal group was not significant difference between three measurement technique. As results above, It is demonstrates that the estimation of %body fat by slim line may offer an exact advantage over SCT and BIA.
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전자기 전항을 이용한 압전 구동방식 마이크로 펌프의 유동 및 성능 특성에 관한 수치해석적 연구
안용준(Yong Jun An),최청렬(Chung Ryul Choi),김창녕(Chang Nyung Kim) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11
A numerical analysis has been conducted for flow characteristics and performance of a micropump with piezodisk and MHD(Magnetohydrodynamics) fluid. Various micro systems which could not be considered in the past have been recently growing with the development of MEMS(Micro Electro Mechanical System) and micro machining technology. Especially, micropumps, essential part of micro fluidic devices, are being lively studied by many researchers. In the present study, the piezo electric micropump with electromagnetic resistance for electrically conducting fluids is considered. The prescribed grid deformation method is used for the displacement of the membrane. The change of the performance of the micropump and flow characteristics of the electrically conducting fluid with the magnitude of the magnetic fields, duct size, the position of the inlet and outlet duct are investigated in the present study.
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안용준(Yong-Jun Ahn),이용주(Yong-Ju Lee),송재복(Jae-Bok Song) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5
To build an accurate map in the unknown environment, a robot should localize itself relative to the global frame. The encoder reading commonly used for dead reckoning of the mobile robot is very erroneous, especially when the robot travels a long distance. To compensate for this error, a scan matching technique based on the range data of tile range sensors such as a laser scanner, etc. This paper proposes a combined scan matching technique improved by line-to-line assignments. Three different scan matching approaches arc examined: matching by point-to-point, point-to-hue, and line-to-line assignments. In this research, various scan matchers arc combined in a suitable manner depending on the situations. If enough scan points tic on the line, then matching by either line-to-line or point-to-line assignments is adopted; otherwise, matching by point-to-point assignments is employed as a scan matching algorithm. Experimental results show that the proposed algorithm can provide good performance and thus be used for localization.
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