ZnO nanorods for gas sensors were prepared by a hydrothermal method. The ZnO gas sensors were fabricated on alumina substrates by a screen printing method. The gas-sensing properties of the ZnO nanorods were investigated for CH4 gas. The effects of growth time on the structural and morphological properties of the ZnO nanorods were investigated by X-ray diffraction and scanning electron microscope. The XRD patterns of the nanocrystallized ZnO nanorods showed a wurtzite structure with the (002) predominant orientation. The diameter and length of the ZnO nanorods increased in proportion to the growth time. The sensitivity of the ZnO sensors to 5 ppm CH4 gas was investigated for various growth times. The ZnO sensors exhibited good sensitivity and rapid response-recovery characteristics to CH4 gas, and both traits were dependent on the growth time. The highest sensitivity of the ZnO sensors to CH4 gas was observed with the growth time of 7 h. The response and recovery times were 13 s and 6 s, respectively.

색채는 지도제작을 위한 중요한 시각변수로 지도상징의 색채인지는 주변환경에 영향을 받는다. 그래서 색채대비는 색채 커뮤니케이션을 위해 반드시 고려되어야 한다. 색채대비가 없는 지도는 지도의 시각성을 떨어뜨리고 판독을 어렵게 한다. 본 연구의 목적은 색채대비를 통해 효율적으로 지도를 제작하기 위한 방법을 살펴보기 위해 색채대비가 지도제작에 이용되는 방식에 대해 살펴보는 것이다. 이를 위해 먼저, 지도제작에서의 색채 사용의 효과와 의미작용을 살펴보았다. 둘째, 이텐에 의한 색채대비의 정의와 유형에 대해 살펴보았다. 셋째, 지도제작에 이용되는 색채대비를 적용하는 방법을 고찰하였다. 넷째, 향후의 창의적 색채지도 제작을 위한 방안들을 논의하였다.

Electro-Discharge Sintering (EDS) employs a high-voltage/high-current-density pulse of electrical energy, discharged from a capacitor bank, to instantaneously consolidate powders. In the present study, a single pulse of 0.57-1.1 kJ/0.45 g-atomized spherical powders in size range of 10~30 and consisting of -(Ti, Zr) and icosahedral phases were applied to examine the structural evolution of icosahedral phase during EDS. Structural investigation reveals that high electrical input energy facilitates complete decomposition of icosahedral phase into C14 laves and -(Ti, Zr) phases. Moreover, critical input energy inducing decomposition of the icosahedral phase during EDS depends on the size of the powder. Porous Ti and W compacts have been fabricated by EDS using rectangular and spherical powders upon various input energy at a constant capacitance of in order to verify influence of powder shape on microstructure of porous compacts. Besides, generated heat () during EDS, which is measured by an oscilloscope, is closely correlated with powder size.

3D스캔-인체 및 의복 모델링-시뮬레이션-패턴 제작 및 검증의 전체 3D 의복제작 프로세스를 원활히 활용할 수 있도록 하기 위하여 3D 그래픽과 CAD 시스템 그리고 3D-2D 직접 패턴 전개 시스템을 이용해야 하는 데 이 때 장애가 되는 것은 3D 시뮬레이션한 가상의복으로부터 정확한 패턴을 추출하는 것이 어렵고, 전반적 과정의 호환이 쉽지 않다는 것이다. 이에 본 연구에서는 인체에 정확히 밀착된 부분과 드레이프가 있는 비대칭형 드레스를 대상으로 전체 프로세스를 원활하게 구동할 수 있는 방법을 모색하였다. 연구 방법으로는 3D 스캔 데이터를 이용하여 Maya로 범용성 3D 인체 모델을 만들고 이 3D 바디 모델에 맞는 3D 드레스를 디자인하고 모델링한 후, Rapidform, 2C-AN 프로그램과 YukaCAD를 이용하여 정확한 2D 패턴을 제작하는 과정의 호환성을 해결하며 진행하였다. 이 과정에서 도출한 패턴을 실제 의상으로 제작하여 착의 시킨 후 3D 의복 모델과의 여유분 분포를 3차원 측정 기술로 검증하였고 실물 드레스의 드레이프의 모양과 시뮬레이트된 드레스의 모양을 검토하였다. 그 결과 제시한 방법을 활용하면 전반적으로 만족스럽게 정량적인 3D 의복 제작 프로세스를 운영할 수 있음을 확인하였다.

This paper deals with a fundamental study for 'Tonhobeondo統戶番圖-making' of Hanseongbu(modern Seoul) before the Japanese colonial period. 'Tonhobeondo統戶番圖 -making' will be accomplished through analysis on Kwangmu-census光武戶籍as a map of address-system in the Joseon period. It is possible to consider the urban changes of Hanseongbu(modern Seoul) because of 'Tonhobeondo統戶番圖' reflects a urban situation from the 1897 to 1906. At present, an address-system of Korea was made by the cadastral survey in the 1914. By the way, new address-system was a completely different from traditional address-system of Joseon period. Consequently, different two address-system caused a lot of difficulties the study on the urban changes. For such a reason 'Tonhobeondo統戶 番圖-making' is very important. If 'Tonhobeondo統戶番圖-making' would be accomplished, it will be used by a field of urban, architectural and historical science study besides.

In this work, fabrication and electrochemical analysis of an individual multi-walled carbon nanotube (MWNT) electrode are carried out to confirm the applicability of electrochemical sensing. The reactive ion etching (RIE) process is performed to obtain sensitive MWNT electrodes. In order to characterize the electrochemical properties, an individual MWNT is cut by RIE under oxygen atmosphere into two segments with a small gap: one segment is applied to the working electrode and the other is used as a counter electrode. Electrical contacts are provided by nanolithography to the two MWNT electrodes. Dopamine is specially selected as an analytical molecule for electrochemical detection using the MWNT electrode. Using a quasi-Ag/AgCl reference electrode, which was fabricated by us, the nanoelectrodes are subjected to cyclic voltammetry inside a 2μL droplet of dopamine solution. In the experiment, RIE power is found to be a more effective parameter to cut an individual MWNT and to generate "broken" open state, which shows good electrochemical performance, at the end of the MWNT segments. It is found that the pico-molar level concentration of analytical molecules can be determined by an MWNT electrode. We believe that the MWNT electrode fabricated and treated by RIE has the potential for use in high-sensitivity electrochemical measurement and that the proposed scheme can contribute to device miniaturization.

Biodegradable octopus pot was developed to reduce plastic pollution problem in the sea and fishing trouble between fishermen. It can be expect to recycle other wasted biodegrade fishing gear. Experimental fishing was carried out to understand the difference in fishing efficiency between Polyethylene (PE) octopus pots and biodegradable (Polybutylene Succinate and Polybutylene adipate-co-terephthalate) octopus pots which was tried to make in this study in the sea. There were caught by 237 numbers of fishing during the experimental period. Among the 237 numbers of fishing, 160 or 67.5% were PE pots which were more than the biodegradable pots. A comparison of the monthly catches between the PE pots and biodegradable pots shows that the catches were overall higher in the PE pots than in the other pots. The result is very similar with the comparison of total catches by each type of the pots. In terms of bycatch, the number of species, amount of catches and the number of fishing with bycatch were more significant in the biodegradable pots than in the PE pots.

In neutron beam research, it is necessary for the shielding block and experimental equipment a dance floor in a nuclear reactor to travel in a fixed direction with little friction. However, precise travel is difficult to achieve due to factors such as vibration or gear backlash. We have imported air bearings from more developed nations to perform the role of moving instruments. In the beginning, an air bearing for use in three-dimensional measuring instruments similar to an air bearing was used; however, the performance was found to be insufficient. Accordingly, we collected data and conducted reverse engineering on this type of thrust pad. Through this process, it was confirmed that two issues were influencing the performance: the slant of the bottom of the air bearing and the bottom outside edge of the air bearing plate. The air bearing begins to move at 5 bar and moves smoothly without interruption at 7 bar. The result of this process was the development of a thrust pad which is superior in performance to the imported product and is being used in neutron beam research. We anticipate that this air bearing which has been developed will be used for experimental equipment which requires this type of precision in the future.

A cobalt oxide - tin oxide nanocomposite based gas sensor on an SiO2 substrate was fabricated. Granular thin film of tin oxide was formed by a rheotaxial growth and thermal oxidation method using dc magnetron sputtering of Sn. Nano particles of cobalt oxide were spin-coated on the tin oxide. The cobalt oxide nanoparticles were synthesized by polymer-assisted deposition method, which is a simple cost-effective versatile synthesis method for various metal oxides. The thickness of the film can be controlled over a wide range of thicknesses. The composite structures thus formed were characterized in terms of morphology and gas sensing properties for reduction gas of H2. The composites showed a highest response of 240% at 250˚C upon exposure to 4% H2. This response is higher than those observed in pure SnO2 (90%) and Co3O4 (70%) thin films. The improved response with the composite structure may be related to the additional formation of electrically active defects at the interfaces. The composite sensor shows a very fast response and good reproducibility.

최근 인터넷을 비롯한 각종 미디어 산업에서 사용자 제작 콘텐츠(User Created Content)라는 의미를 지닌 UCC가 급부상하고 있다. UCC에 대한 다양한 연구가 진행되고 있으나 UCC의 단점인 단방향 피상적인 형태를 극복하기 위한 상호작용과 관련된 연구는 많지 않다. 특히, 체험적인 상호작용 형태의 UCC의 제작과 그 효과에 대한 연구는 매우 미미하다. 기존의 여러 연구에서 상호작용적인 특성은 교육이나 홍보에 있어서 높은 효과를 가져온 다는 것을 보여준다. 따라서 본 연구에서는 공급자 위주의 UCC의 문제점을 제시하고 이를 해결하기 위하여 UCC와 사용자 사이에 상호작용 기능을 갖춘 새로운 형태의 UCC를 제시하였다. 제시한 물산업과 관련된 UCC를 사용자들이 이용한 후 설문 조사를 통해 그 효과를 분석한 결과, 기존의 UCC를 시청하는 것보다 상호작용 UCC를 시청하는 것이 인지도 변화 측면에서 높은 수치를 나타냈다. 또한 이러한 분석결과로부터, 상호작용 UCC가 활성화되면 교육, 상업, 홍보측면에서 큰 도움이 될 것이라는 결과를 나타냈다. 구체적인 설문 결과를 알아보면, 상호작용 UCC가 도움이 된다고 답한 비율이 응답자들 중에서 홍보 분야에서는 84%, 교육 분야에서는 70%, 상업 분야에서는 52%로 나타났다.

This paper is concerned with the designing and making power lifting wheelchair. This wheelchair is studied based on the mechanical and electrical engineering concepts and theories. The statics and dynamics are studied with moving and lifting motion. The power lifting wheelchair is compared with the previous model, the power standing wheelchair, in the sense of kinematics and kinetics. The main functions of these two models are to reach to the standing height of normal person and to move by electrical power. However the lifting mechanism gives more comfortable feeling to users when the chair reaches to the high position with sitting in chair. Without stretching the user’s leg, the X-truss mechanism is applied in this wheelchair. Also the wheelchair is controlled by the joystick attached on the arm rest. The real size model is made and investigated by the test drive. Finally, this power lifting wheelchair proves the possibility of commercial production.

This paper is concerned with the designing and making small unmanned aerial vehicle robot. In general, Unmanned Aerial Vehicle(UAV) is the aircraft without human pilot and then controlled by computer programs or person in Ground Control Center(GCC). The UAV can be used very widely and effectively in disasters situations, for example, exploration of fires in mountains and salvation of missing peoples in earthquakes. In these essential purposes of UAV, it is very demandable to design and make the commercial model nowadays. So this is the very practical and economical results in designing and making the small UAV robot. The main body of aerial vehicle is studied by inspection of aerodynmic concepts and made as commercial model. All electrical and computer-controlled systems are studied and selected to satisfy the desired functions and specifications of UAV. The results of experimental flights by the newly designed and assembled UAV robot in this paper show the possibilities and practicalities. Finally, the UAV robot of this research proves the possibility of field adaptations in real disastrous situations.

기능성 게임은 게임의 재미 요소를 적용하여 게임을 하는 대상에게 특별한 목적을 효율적으로 전달하는 게임으로 사회적, 문화적으로 요구되는 해당주제의 필요성이 반영되어 개발 되고 있다. 기능성 게임 분야는 세계적으로 교육, 치료, 홍보, 훈련, 모금 등 다양한 목적으로 폭넓게 제작되었고, 이미 제작된 기능성 게임들을 분석하면 ‘목적’과 ‘재 미’로 크게 분류 할 수 있고, 이 분석에 따르면 목적을 전달하기 위한 요소로는 서사, 정보, 임무, 경험, 성장, 선택, 훈 련, 커뮤니티로 분류되고, 기능성 게임의 재미는 미적재미, 플레이 재미, 체험의 재미로 분류된다. 분류된 재미는 게임 에서 스토리, 배경, 캐릭터, 효과 음악, 성장, 퀘스트 등 다양한 재미요소가 적용되어 제작된다. 본 논문은 1단계에는 기존의 개발 되었던 기능성 게임을 단계별로 ‘목적성’과 ‘재미성’으로 분석하고, 2단계에서는 각각의 요소들을 정리하 여 기능성 게임개발과정에 적용방안을 모색하고. 3단계에서는 목적요소와 재미요소의 상관관계 특징을 연구하여 게이 머의 게임 플레이 시간에 따른 설계 방법과 특징을 제안하여 향후 기능성 게임의 효율적인 제작과 개발에 기여한다.

We studied the influence of different types of metal electrodes on the performance of solution-processed zinc tin oxide (ZTO) thin-film transistors. The ZTO thin-film was obtained by spin-coating the sol-gel solution made from zinc acetate and tin acetate dissolved in 2-methoxyethanol. Various metals, Al, Au, Ag and Cu, were used to make contacts with the solution-deposited ZTO layers by selective deposition through a metal shadow mask. Contact resistance between the metal electrode and the semiconductor was obtained by a transmission line method (TLM). The device based on an Al electrode exhibited superior performance as compared to those based on other metals. Kelvin probe force microscopy (KPFM) allowed us to measure the work function of the oxide semiconductor to understand the variation of the device performance as a function of the types metal electrode. The solution-processed ZTO contained nanopores that resulted from the burnout of the organic species during the annealing. This different surface structure associated with the solution-processed ZTO gave a rise to a different work function value as compared to the vacuum-deposited counterpart. More oxygen could be adsorbed on the nanoporous solution-processed ZTO with large accessible surface areas, which increased its work function. This observation explained why the solution-processed ZTO makes an ohmic contact with the Al electrode.

본 연구는 그동안 영화, 텔레비전, 만화, 잡지, 광고 등 각 분야에서 이루어졌던 미디어 폭력물 연구를 이용자 제작콘텐츠로 확장하고자 하는 문제의식에서 출발하였다. 여러 형태의 이용자 제작콘텐츠 중 제작과 유포가 용의하고 누구나 여러 인터넷 게시판을 통해 쉽게 접근이 가능한 웹툰을 중심으로 하여, 폭력물 연구의 초석을 다지고자 내용분석을 통해 폭력성의 수위를 객관적으로 점검해보았다. 웹툰의 경우 포털사이트에서 고료를 지급받는 전문적 작가진에 의해 서비스되는 웹툰과 다양한 커뮤니티 게시판 등에서 일반 이용자들이 자유롭게 제작하고 유포하는 웹툰이 구분될 수 있어, 제작 주체 간 웹툰의 폭력성에 차이가 보일 것으로 예상하였다. 분석은 영화와 텔레비전 폭력물의 내용분석에서 사용된 PAT단위 분석을 통해 진행되었다. 분석결과, 폭력적 행위가 묘사된 웹툰은 표집 대상의 60%정도로 나타났다. 한편, 폭력 연구에서 최근 주목 받기 시작한 언어적 폭력이 웹툰에서는 물리적 폭력만큼이나 높은 빈도를 나타내는 것을 확인 할 수 있었다. 또한 웹툰의 폭력성에 대한 기준이 마련되어 있지 않지만, 텔레비전의 폭력성을 연구한 기존의 연구에 비추어보아, 그 심각성이 간과할 수 없는 수준임이 밝혀졌다. 제작주체별로 웹툰의 폭력성 빈도와 강도, 맥락적 요인에서 차이점이 존재함을 확인하였다.