HTML5와 CSS3의 Transform을 이용한 3D 오브젝트 구현

전승효(Seung-Hyo Jeon),정태용(Tae-Yong Jung),한승우(Seung-Wo Han),김영진(Young-Jin Kim),김윤호(Yoon-Ho Kim) 한국정보기술학회 2013 Proceedings of KIIT Conference Vol.2013 No.5

일미찰옥수수의 유묘기 저온에 따른 생육특성 변화

전승호,오승가,김한용,나채인,배희수,조영손,Jeon, Seung Ho,Oh, Seung Ka,Kim, Han Yong,Na, Chae-In,Bae, Hui Su,Cho, Young Son 한국작물학회 2020 한국작물학회지 Vol.65 No.4

To determine the damages to waxy corn caused by low temperature weather, we investigated the relationship between the temperature and duration of low temperature treatment and the changes in growth characteristics during the recovery period after the treatments in different growth periods. Growth inhibition started in the low temperature group treated at temperatures below 5℃ for three days. The inhibition ratio (IR) was more than 22% or more in all sample groups. As the treatment duration increased and the Temperature decreased, the growth was more greatly inhibited than that in the control. The IR was the highest at 27% or more in the 2nd leaf stage group treated at below 5℃ for 5 days. The IR was in the order of 2nd leaf stage > 1st leaf stage > coleoptile. The IR during recovery was the highest in the 2nd leaf stage group treated at -3℃ degree for 7 days, nd the values were 82% and 98% for NDVI and Fv/Fm, respectively. Especially, all groups treated at -3℃ showed either no changes or decreases in the growth characteristics. As a result, growth inhibition increased as the temperature decreased, and as the duration of the low temperature increased. The degree of damage was in the order of 2nd leaf stage > 1st leaf stage > coleoptile. All early seedlings stopped growing and withered when exposed to temperatures at or below -3℃ for 3 days or more.

8um 피치 SXGA급 비냉각 적외선 검출기 개발 및 환경성 평가

전승기 ( Seung Ki Jeon ),권명호 ( Myung Ho Kwon ),강상구 ( Sang Gu Kang ),한명수 ( Myung Soo Han ) 한국국방기술학회 2022 한국국방기술학회 논문지 Vol.4 No.3

비냉각형 적외선 검출기를 적용한 열상 시스템의 경우 군수용 및 민수용 분야에서 다양하게 응용 범위를 넓혀가고 있다. 특히 군수용 열상 시스템의 경우 보다 체계의 고도화를 위한 고해상도 적외선 센서 개발이 요구되고, 민수용 열상 시스템의 경우 다양한 에플리케이션에 적용하기 위해 열상 검출기의 소형화 및 경량화가 요구된다. 적외선 센서의 픽셀 피치를 17um 피치에서 8um 피치크기로 감소시킴으로써, 소형화 및 고해상도 센서 개발이 용이하지만, 이로인한 적외선 센서 성능이 감소하는 문제를 극복하는 것이 기술 개발 핵심이다. 감소된 픽셀 피치의 적외선 센서의 성능을 극대화하기 위해서는 입사하는 적외선을 흡수하는 영역과 열적 고립을 위한 영역의 구조적 분리가 필요하며 이를 구현하기 위해 복층 구조의 마이크로볼로미터 개발이 요구된다. 본 논문에서는 8μm 픽셀 피치를 갖는 SXGA급(1280*1024) 비냉각 적외선 검출기 개발에 관한 것으로 피치가 감소하면서 발생하는 수광 면적 감소 및 열적 고립도 감소를 개선하기 위하여 복층 구조 FPA(Focal Plane Array) 설계 기술 및 0.18um MEMS Technology 설계 기술을 활용하였으며, 소형화 및 경량화를 위해 세라믹 패키지를 적용하여 NETD 50mK 이하의 비냉각형 적외선 검출기를 제작하였다. 또한 비냉각 적외선 검출기에 대한 환경성 및 신뢰성 시험 평가를 수행하여 체계적용성 및 실용성을 검증을 하였다. In the case of a thermal imaging system to which a uncooled infrared detector is applied, the application range is expanding in various ways in the field of military and civilian use. In particular, in the case of a military thermal system, it is required to develop a high-resolution infrared sensor to upgrade the system, and in the case of a civil thermal system, it is required to miniaturize and lighten the thermal detector to apply to various applications. By reducing the pixel pitch of infrared sensors from 17um pitch to 8um pitch size, it is easy to develop miniaturized and high-resolution sensors, but overcoming the problem of decreasing infrared sensor performance is the key to technology development. The structural separation of an area absorbing incident infrared rays and an area for thermal isolation is required to maximize the performance of an infrared sensor with a reduced pixel pitch, and to implement this, it is required to develop a multi-layered microbolometer. In this paper, we develop an SXGA-class (1280*1024) uncooled infrared detector with an 8um pixel pitch and fabricate using multilayered FPA(focal plane array) design techniques and 0.18um 3D MEMS technology design techniques to improve absorption area and thermal isolation reduction as the pitch decreases. For miniaturization and weight reduction of infrared detectors, ceramic packages were applied to manufacture uncooled infrared detectors of NETD 50 mK or less. In addition, environmental and reliability test evaluation of uncooled infrared detectors was performed to verify system applicability and practicality.

제주 화산회토양의 중금속 연속추출 특성 및 작물 흡수에 미치는 영향

임한철(Han-Cheol Lim),문경환(Kyung-Hwan Moon),전승종(Seung-Jong Jeon),박원표(Won-Pyo Park),현해남(Hae-Nam Hyun) 한국토양비료학회 2009 한국토양비료학회지 Vol.42 No.2

이 시험은 제주도 화산회토양을 이용하여 Ni, Cu,Zn의 토양중 존재형태를 알아보고 토양 중금속이 청경채의 흡수에 미치는 영향을 알아보고자 수행되었다. 토양 중 함량을 연속추출법에 의해 알아본 결과 토양 종류마다 각 중금속의 존재형태가 차이가 있었고, 이를 이용하여 토양 종류를 구분할 수 있었다. 중금속 함량이 다른 토양을 이용하여 청경채를 재배했을 경우 Zn, Cu는 뿌리에서 흡수되어 지상부로 이동되었으나 Ni은 지상부에서 거의 검출이 되지 않아 청경채 내에서 미량원소의 이동성이 달랐다. 그러나 토양 중 함량과 청경채의 함량 간에는 치환성 Zn을 제외하고는 상관관계가 없었으며, 특히 Ni은 식물체 내에서 이동도 어려울 뿐만 아니라 토양 중 함량과 상관관계를 내기도 어렵기 때문에 전함량이나 치환성함 량 등 지금까지의 방법에 의한 토양 중 함량으로 식물체의 함량을 추정하기에는 매우 어렵다고 판단되므로 새로운 접근방법이 개발될 필요가 있다고 판단된다. 인체의 중금속 흡수에 의한 위해성 평가와 관련해서는 토양 식물체, 식물체 인체 두 단계를 거치게 되는데 각 단계에서 불확실성이 존재하므로 중금속의 기준을 토양 및 식물체 별로 각각 마련하는 것보다는 식물체내 농도만으로 정하는 것도 한가지 해결책이 될 수 있다고 생각한다. We studied to compare the fractionation patterns of Ni, Cu, Zn in Jeju volcanic ash soils and to elucidate the uptakes of them by Pakchoi(Brassica campestris var. chinensis). Fractionation patterns of soils by sequential extraction method were different and make to distinguish from various soil types. In Pakchoi, the transfer rates of Ni, Cu, Zn from root to shoot were also different by metal types. There are low corelation between fractional contents in soil and contents in plants of trace elements except for exchangeable Zn. It is needed to develop novel methods for the assessment soil Ni in relation to plant uptake because of poor corelation.

어븀-실리사이드/p-형 실리콘 접합에서 쇼트키 장벽 높이 변화

이솔,전승호,고창훈,한문섭,장문규,이성재,박경완,Lee, Sol,Jeon, Seung-Ho,Ko, Chang-Hun,Han, Moon-Sup,Jang, Moon-Gyu,Lee, Seong-Jae,Park, Kyoung-Wan 한국진공학회 2007 Applied Science and Convergence Technology Vol.16 No.3

Ultra thin Er-silicide layers formed by Er deposition on the clean p-silicon and in situ post annealing technique were investigated with respect to change of the Schottky barrier height. The formation of Er silicides was confirmed by XPS results. UPS measurements revealed that the workfunction of the silicide decreased and was saturated as the deposited Er thickness increased up to $10{\AA}$. We found that the silicides were mainly composed of Er5Si3 phase through the XRD experiments. After Schottky diodes were fabricated with the Er silicide/p-Si junctions, the Schottky barrier heights were calculated $0.44{\sim}0.78eV$ from the I-V measurements of the Schottky diodes. There was large discrepancy in the Schottky barrier heights deduced from the UPS with the ideal junction condition and the real I-V measurements, so that we attributed the discrepancy to the $Er_5Si_3$ phase in the Er-silicides and the large interfacial density of trap state of it. p-형 실리콘 기판 위에 수 ${\AA}$ 두께의 어븀 금속을 증착하고, 후열처리 과정을 통하여 어븀-실리사이드/p-형 실리콘 접합을 형성하였다. 초고진공 자외선 광전자 분광 실험을 통하여 증착한 어븀의 두께에 따라 어븀-실리사이드의 일함수가 4.1 eV까지 급하게 감소하는 것을 관찰하였으며, X-ray 회절 실험에 의하여 형성된 어븀 실리사이드가 주로 $Er_5Si_3$상으로 구성되어 있음을 밝혔다. 또한, 어븀-실리사이드/p-형 실리콘 접합에 알루미늄 전극을 부착하여 쇼트키 다이오드를 제작하고, 전류전압 곡선을 측정하여 쇼트키 장벽의 높이를 산출하였다. 산출된 쇼트키 장벽의 높이는 $0.44{\sim}0.78eV$이었으며 어븀 두께 변화에 따른 상관 관계를 찾기 어려웠다. 그리고 이상적인 쇼트키 접합을 가정하고 이미 측정한 일함수로부터 산출한 쇼트키 장벽의 높이는 전류-전압 곡선으로부터 산출한 값에 크게 벗어났으며, 이는 어븀-실리사이드가 주로 $Er_5Si_3$ 상으로 구성되어 있고, $Er_5Si_3/p-$형 실리콘 계면에 존재하는 고밀도의 계면 상태에 기인한 것으로 사료된다.

제주도 화산회토양에서 Ni, Cu 및 Zn의 자연함유량 특성

임한철(Han-Cheol Lim),문경환(Kyung-Hwan Moon),전승종(Seung-Jong Jeon),장공만(Kong-Man Chang),현해남(Hae-Nam Hyun) 한국토양비료학회 2008 한국토양비료학회지 Vol.41 No.3

본 연구는 제주지역 토양에서 Ni 함량이 높은 원인을 밝히고 인위적인 함량증가가 우려되는 Cu와 Zn의 함량 특성을 구명하기 위해 수행되었다. 토양시료는 Alfisols 4개통, Andisols 35개통, Endisols 9개통, Inceptisols 16개통, Ultisols 1개통에서 채취하였으며, 동일한 지점에서 모암(자갈) 시료를 채취하였다. 토양색별 Ni, Cu 및 Zn의 함량은 통계적인 유의성은 보이지 않았으나 Ni 평균함량은 79.2 mg kg<SUP>-1</SUP>으로 토양색으로 분류한 토양별 평균함량이 토양오염우려 기준을 초과하였다. Cu 함량은 40 mg kg<SUP>-1</SUP> 내외, Zn은 108 mg kg<SUP>-1</SUP> 내외로 토양오염우려기준에 비해 낮았으며, 토양색간 함량 차이가 크지 않았다. 토양목별 Ni 함량은 Entisols에서 특이하게 높았으며, 그 외의 토양목에서는 비슷한 함량을 보였다. Cu와 Zn은 토양목과 무관하게 비슷한 경향을 나타내었다. Ni 함량이 많은 암석은 성산층, 신더어콘 및 침상장석 감람석현 무암에서 높았으며, 장석현무암 및 조면질 안산암에서 낮았다. Ni은 경작지에 비해 비경작지 함량이 높았으나, Cu와 Zn 함량은 비경작지에 비해 경작지에서 높은 현상이 뚜렷하였다. Ni은 총 시료 중에서 표토/심토 비가 1보다 낮은 토양이 대부분이었으나 Cu와 Zn은 전함량의 표토/심토 비는 1보다 높은 토양이 많아 인위적인 요인에 의해 표토에 Cu가 집적되는 것으로 보인다. This study was carried out to find out causes of high Ni content and characteristics of potential increase of Cu and Zn contents in the soils of Jeju area. Soil samples were collected from 4 series of Alfisols, 35 series of Andisols, 9 series of Entisols, 16 series of Inceptisols, and 1 series of Ultisols, respectively. Parent material (gravel) samples were also collected from the same sites where soil samples were taken. Both soil and parent material samples were analyzed for Ni, Cu, and Zn. The average Ni content of all the soil samples was 79.2 mg kg<SUP>-1</SUP>, which was exceeded warning standard for Ni against the Soil Conservation Act in Korea, whereas that of Cu and Zn contents were lower than the warning standard for Cu and Zn. The difference of Ni, Cu and Zn content was not consistent depending upon soil color. Ni content in the soil samples from Entisols was particularly high, whereas that from the other soil orders was similar to each other. Cu and Zn contents in the soil samples were similar regardless of the difference in soil order. Ni content in Seongsan Formation(SSF), Cinder cone(C) and acicular Feldspar Olivine Basalt(FOB) was high, while that in Feldspar Basalt(FB) and Trachy Andesite lava(TA) was low. Ni content in the non-agricultural land was higher compared with that in the agricultural land, whereas Cu and Zn contents in the non-agricultural land were significantly lower than that of agricultural land. The topsoil/subsoil ratios for Ni content in most of the soil samples were less than 1, while that for total contents of Cu and Zn in many of the soil samples were larger than 1 indicating potential Cu and Zn accumulation in topsoil by artificial reasons.

철도차량 HVAC시스템의 광플라즈마 성능평가

한환수(Han Hwan-Su),전승기(Jeon Seung-Gie),박태영(Park Tae-Young),김봉상(Kim Bong-Sang),박덕신(Park Duck-Shin),권순박(Kwon Soon-Bark) 한국철도학회 2007 한국철도학회 학술발표대회논문집 Vol.- No.-

An amenity requirement of the passenger using public traffic is rising continuously, and also The Ministry of Environment established "Indoor air quality management guidelines in public facilities(Dec. 2006)". To satisfy such requirement, the photoplasma device to decrease VOCs(Volatile Organic Compounds) and suspended bacillus is applied to the underframe mounted HVAC(Heating, Ventilating and Air-Conditioning) system for train. Air purifying method of photoplasma device is optical and chemical reaction that UV-light(wavelength less than 280nm) react with catalyst material(TiO2). To analyze the efficiency of photoplasma in this study, we measured the requirement time for toluene to decease down to 0.3ppm after contaminating the passenger cabin for train to toluene 1ppm.

가스터빈용 열교환기의 주름진 덕트에서 종횡비 변화가 열전달 특성에 미치는 영향

김한호(Han Ho Kim),황상동(Sang Dong Hwang),조형희(Hyung Hee Cho),최재호(Jae Ho Cho),전승배(Seung Bae Jeon) 한국유체기계학회 2001 유체기계 연구개발 발표회 논문집 Vol.- No.-

The present study investigates convective heat/mass transfer and flow characteristics in wavy ducts of primary surface heat exchanger. Experiments using a naphthalene technique are carried out to determine the local transfer characteristics for flow in the corrugated wall duct. The aspect ratios of the rectangular duct cross-section are 7.3, 4.7 and 1.8 with a corrugation angle of 145°. The Reynolds numbers, based on the duct hydraulic diameter, are ranged from 1000 to 5000. The local heat/mass transfer measurement is conducted in the spanwise directions. The results show that Tayler-Gortler vortices exist on the pressure surface. Flow separation on the suction surface appears at a high Reynolds number resulting in a sharp decrease in the local transfer rates, but relatively high transfer rates are obtained in the reattachment region.

다구찌 방법을 이용한 무반사 종단 덕트 설계

김회전(Hoi-Jeon Kim),이상훈(Sang-Hoon Lee),전승경(Seung-Kyoung Jeon),한상명(Sang-Myoung Han) 한국소음진동공학회 2007 한국소음진동공학회 학술대회논문집 Vol.2007 No.11

백서 편측 설신경 손상 후 미각 및 설유두의 변화에 대한 연구

김윤태(Yoon-Tae Kim),전승호(Seung-Ho Jeon),염학렬(Hak-Ryol Yeom),강진한(Jin-Han Kang),안강민(Kang-Min Ahn),김성민(Sung-Min Kim),장정원(Jeongwon Jahng),박경표(Kyung-Pyo Park),이종호(Jong-Ho Lee) 대한구강악안면외과학회 2005 대한구강악안면외과학회지 Vol.31 No.6

Purpose of study: Lingual nerve damage can be caused by surgery or trauma such as physical irriatation, radiation, chemotherapy, infection and viral infection. Once nerve damage occurred, patients sometimes complain taste change and loss of taste along with serious disturbance of tongue. The purpose of this study was to evaluate the effects of unilateral lingual nerve transection on taste as well as on the maintenance of taste buds. Materials & Methods: Male Sprague-Dawley rats weighing 220-250g received unilateral transection of lingual nerve, subjected to the preference test for various taste solutions (0.1M NaCl, 0.1M sucrose, 0.01M QHCl, or 0.01M HCl) with two bottle test paradigm at 2, 4, 6, or 8 weeks after the operation. Tongue was fixed with 8% paraformaldehyde. After fixation, they were observed with scanning electron microscope(JSM-840A, JEOL, JAPAN) and counted the number of the dorsal surface of the fungiform papilla for changes of fungiform papilla. And, Fungiform papilla were obtained from coronal sections of the anterior tongue(cryosection). After cryosection, immunostaining with Gαgust(I-20)(Santa Cruz Biotechnology, USA), PLCβ2(Q-15)(Santa Cruz Biotechnology, USA), and T1R1(Alpha Diagnostic International, USA) were done. Immunofluorescence of labeled taste bud cells was examined by confocal microscopy(F92-300, Olympus, JAPAN). Results: The preference score for salty and sweet tended to be higher in the operated rats with statistical significance, compared to the sham rats. Fungiform papilla counting were decreased after lingual nerve transaction. In 2 weeks, maximum differences occurred. Gustducin and T1R1 expressions of taste receptor in 2 and 4 weeks were decreased. PLCβ2 were not expressed in both experimental and control group. Conclusion: This study demonstrated that the taste recognition for sweet and salty taste changed by week 2 and 4 after unilateral lingual nerve transection. However, regeneration related taste was occurred in the presence of preserving mesoneurial tissue and the time was 6 weeks. Our results demonstrated that unilateral lingual nerve damage caused morphological and numerical change of fungiform papilla. It should be noted in our study that lingual nerve transection resulted in not only morphological and numerical change but also functional change of fungiform papillae.