• 디지털융복합연구
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• 제10권8호
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• pp.239-247
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• 2012

본 논문은 시점 벡터 추정과 명도 차분 맵에 기반하여 직물 텍스쳐 매핑을 수행하는 객체 VR 기반 가상 직물 착용 시스템에 관한 것이다. 제안된 시스템은 객체 VR 용도의 다시점 2D 의류 모델 영상들에서 의류 형상 영역을 분할하여 사용자가 선택한 새로운 직물 패턴을 가상적으로 착용시킨 후, 이러한 가상 착용 상태를 다시점에서 입체적으로 관측할 수 있도록 한 것이 특징이다. 제안된 시스템은 모델 의류의 컬러나 명도에 관계없이 선택된 의류 형상 영역의 특성을 유지하면서 직물 패턴을 가상적으로 변경시킬 수 있다. 또한 각기 다른 스타일 혹은 전체적인 차림새를 위한 다양한 직물 패턴 조합을 신속하고 용이하게 시뮬레이션하고 비교 선택할 수 있다. 제안된 시스템은 다양한 디지털 환경에서 실시간 처리가 가능하고 비교적 자연스럽고 입체적인 가상 착용 스타일을 제공할 뿐만 아니라 수작업을 줄인 반자동화 처리가 가능하기 때문에 높은 실용성과 편리한 사용자 인터페이스를 제공할 수 있다.

• Carbon letters
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• 제22권
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• pp.48-59
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• 2017

This study synthesized pure anatase carbon doped $TiO_2$ photocatalysts supported on a stainless steel mesh using a sol-gel solution of 8% polyacrylonitrile (PAN)/dimethylformamide (DMF)/$TiCl_4$. The influence of the pyrolysis temperature and holding time on the morphological characteristics, particle sizes and surface area of the prepared catalyst was investigated. The prepared catalysts were characterized by several analytical methods: high resolution scanning electron microscopy (HRSEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), and X-ray photoelectron spectroscopy (XPS). The XRD patterns showed that the supported $TiO_2$ nanocrystals are typically anatase, polycrystalline and body-centered tetragonal in structure. The EDS and XPS results complemented one another and confirmed the presence of carbon species in or on the $TiO_2$ layer, and the XPS data suggested the substitution of titanium in $TiO_2$ by carbon. Instead of using calcination, PAN pyrolysis was used to control the carbon content, and the mesoporosity was tailored by the applied temperature. The supported $TiO_2$ nanocrystals prepared by pyrolysis at 300, 350, and $400^{\circ}C$ for 3 h on a stainless steel mesh were actual supported carbon doped $TiO_2$ nanocrystals. Thus, $PAN/DMF/TiCl_4$ offers a facile, robust sol-gel related route for preparing supported carbon doped $TiO_2$ nanocomposites.

• 대한한의학원전학회지
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• 제29권4호
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• pp.105-125
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• 2016

Objectives : This study aims to investigate the background of, and theoretical system behind the Jinkuiyuhanjing that was edited and published at the same time as the Shanghanlun by the Jiaozhengyishuju (governmental publishing sector) of Northern Song. Methods : To determine the background against which Jinkuiyuhanjing was published, its position and meaning within the Medical Texts Editing Project of the Jiaozhengyishuju was firstly examined. For its theoretical background, the contents of Zhengzhizongli, which is considered to be an introduction to the Jinkuiyuhanjing was thoroughly analyzed. Moreover, to understand the unique philosophy of the Jinkuiyuhanjing, referneces were made to relevant contents in the 'Shinhyeong' chapter of the Donguibogam. Results : The findings of the study call for a re-evluation of the Jinkuiyuhanjing as holding a unique philosophical perspective and having an independent lineage instead of being a supplementary material to the Shanghanlun as it was once understood. Conclusions : The research of Zhangzhongjing's Classical Formulas(經方) revealed that the theoretical thinking and contents of Jinkuiyuhanjing hold much value and should be actively studied and applied. Furthermore, it lends important meaning in understanding the tradition of Korean Classical Formulas as represented in the Donguibogam.

• 한국산학기술학회논문지
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• 제17권6호
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• pp.629-641
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• 2016

본 연구는 일 간호대학생의 블록제 수업 경험의 본질을 이해하여 효율적인 교육과정 개선을 위한 기초자료를 제공하기 위해 2015년 6월 20일부터 7월 10일까지 G시에 소재한 일 대학 간호학과 학생 18명을 대상으로 실시하였다. 본 연구의 질문은 '간호대학생의 블록제 수업 경험은 어떠한가?' 이며 Colaizzi(1978)가 제시한 현상학적 연구 방법을 적용하여 자료를 분석하였다. 연구결과 58개의 구성된 의미에서 '불편한 마음', '비체계적인 학습', '안간힘 쓰기', '힘들어지는 인간관계', '새로운 발견', '발전의 기회'의 6개 주제 모음과 이에 포함된 17개의 주제와 42개의 하위 주제가 확인되었다. 따라서 간호대학생은 블록제 수업을 통하여 방대한 학습량과 과제의 홍수로 신체적, 정신적 불편감을 경험하지만, 나름 최선의 노력으로 이 과정을 무사히 마침으로써 이전에는 몰랐던 시간 활용의 중요성을 인식하게 되고, 더 나은 자신을 위해 새로운 각오를 다져나가는 기회가 됨을 알 수 있다. 이러한 결과는 간호대학생의 건강한 대학생활을 위해서 이들의 경험에 기초한 스트레스 관리 및 정서적 지지 프로그램의 개발이 필요함을 나타낸다.

• Journal of Periodontal and Implant Science
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• 제25권1호
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• pp.67-75
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• 1995

The progress of periodontal disease and the wound healing process after treatment result in alveolar bone bone change. So, detection of it is very important in the diagnosis and the radiograph of periodontal disease. Various effects have been made to assess the subtle alveolar bone change and digital subtraction radiography (DSR) has been reported to be the best method in evaluating it qualitatively and quantitatively. The present study was performed to estimate the detectable alveolar bone change qualitatively with digital subtraction radiography. For the in vitro study, 10 intraoral standard radiographs were taken from porcine dry mandible which a rectangular cortical bone chip of 0.1mm to 1.0mm thickness with 0.1mm increment was attached on the buccal surface. The radiographs without and with bone plates were reviewed at the same time by 10 observers and requested to detect the presence of cortical bone plates. Digital Subtraction radiograph was reviewed subsequently by using the DSR system(digital converter-256 grey-levels,DT 2851,Data Translation Co., U.S.A;IBM 386 ; CCD camera, FOTOVIX, Tamrom Co., Japan). The detectable thickness of cortical bone plate was O.4mm on the intraoral radiograph and 0.2mm on the subtaction images. For the human study, radiographs were taken from patients by using intraoral film holding device and aluminum reference wedge before and 3 month after bone graft and 1 week after osteoplasty. The grey level change was estimated in the subtraction images and calculated to aluminum equivalent thickness. The grey level of the grafted site was higher that that of healthy controls. Average grey levels of change on healthy controls were O.48mm aluminum equivalent. However, the amount of changes in grafted sites were 1.87mm aluminum thickness equivalent and in the site of osteoplasty were -1.49mm aluminum thickness equivalent. In conclusion, digital subtraction radiography was more effective in detecting as subtle change of alveolar bone than intraoral standard radiography. With the aid of quantitative analysis of digital subtraction radiography, alveolar bone resorption of apposition can be estimated during diagnosis and treatment of periodontally diseased patients.

• The Korean Journal of Physiology and Pharmacology
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• 제1권6호
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• pp.741-748
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• 1997

In the present study, we have investigated the effect of metabolic inhibition on the inward rectifier K current ($I_{K1}$). Using whole cell patch clamp technique we applied voltage ramp from +80 mV to -140 mV at a holding potential of -30 mV and recorded the whole cell current in single ventricular myocytes isolated from the rabbit heart. The current-voltage relationship showed N-shape (a large inward current and little outward current with a negative slope) which is a characteristic of $I_{K1}$. Application of 0.2 mM dinitrophenol (DNP, an uncoupler of oxidative phosphorylation as a tool for chemical hypoxia) to the bathing solution with the pipette solution containing 5 mM ATP, produced a gradual increase of outward current followed by a gradual decrease of inward current with little change in the reversal potential (-80 mV). The increase of outward current was reversed by glibenclamide ($10\;{\mu}M$), suggesting that it is caused by the activation of $K_{ATP}$. When DNP and glibenclamide were applied at the same time or glibenclamide was pretreated, DNP produced same degree of reduction in the magnitude of the inward current. These results show that metabolic inhibition induces not only the increase of $K_{ATP}$ channel but also the decrease of $I_{K1}$. Perfusing the cell with ATP-free pipette solution induced the changes very similar to those observed using DNP. Long exposure of DNP (30 min) or ATP-free pipette solution produced a marked decrease of both inward and outward current with a significant change in the reversal potential. Above results suggest that the decrease of $I_{K1}$ may contribute to the depolarisation of membrane potential during metabolic inhibition.

• 대한전자공학회논문지SD
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• 제43권7호
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• pp.1-6
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• 2006

본 연구에서는 광 논리 및 광 접속에 응용할 수 있는 GaAs/AlGaAs 구조의 완전 공핍 광 싸이리스터(depleted optical thyristor, DOT)에 VCSEL(vertical-cavity surface-emitting laser diode)을 응용하여, 활성층 위, 아래에 1/4 파장 거울층(quarter wavelength reflector stacks)을 제작함으로서 본 구조에서 최초의 레이징 특성을 구현하였고, 그 특성을 측정, 분석하였다. 스위칭 특성을 알아보기 위하여 순방향 전압에서는 비선형 s-자형의 전류-전압 특성을, 역방향 전압에서는 완전 공핍 전압을 모의실험으로 알아보았다. 모의실험을 바탕으로 설계, 제작한 VCL-DOT(Vertical Cavity Laser - Depleted Optical Thyristor)의 스위칭 전압과 전류는 5.24 V, $5{\mu}A$ 이고, 홀딩 전압과 전류는 각각 1.50 V, $100{\mu}A$가 나왔다. 측정된 레이징 문턱 전류는 0.65 mA 이고, 출력 파장은 854.5 nm의 레이징 특성을 확인하였다.

• 한국축산식품학회지
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• 제34권1호
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• pp.80-87
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• 2014

Ready-to-eat (RTE) Jokbal (Pig's trotter), which consists of pig's feet cooked in soy sauce and various spices, is a very popular and widely sold in Korean retail markets. Commercially, the anaerobically packed Jokbal have also become a popular RTE food in several convenience stores. This study evaluates the effects of storage temperature and packaging methods for the growth of C. perfringens in Jokbal. Growth kinetic parameters of C. perfringens in aerobically and anaerobically packed Jokbals are determined at each temperature by the modified Gompertz equation. The lag time, specific growth rate, and maximum population density of C. perfringens are being analyzed as a function of temperature and packaging method. The minimum growth temperature of C. perfringens in aerobically and anaerobically packed Jokbal is $24^{\circ}C$ and $18^{\circ}C$, respectively. The C. perfringens in Jokbal did not grow under conditions of over $50^{\circ}C$ regardless of the packaging methods, indicating that the holding temperature of Jokbal in markets must be maintained at above $50^{\circ}C$ or below $18^{\circ}C$. Growth of C. perfringens in anaerobically packed Jokbal is faster than in aerobically packed Jokbal when stored under the same conditions. This indicates that there are a higher risks associated with C. perfringens for anaerobically packed meat products.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1991년도 하계학술대회 논문집
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• pp.204-208
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• 1991

In this paper, the radiation properties of a far-Infrared using a PTC thermistor, the $BaTiO_3$+1.63mol% $Al_2O_3$+3.75mol% $SiO_2$+1.25mol% $TiO_2$(1/3 $Al_2O_3+xSiO_2$+(1-x) $TiO_2$; total x: 6.67mol%) ceramics, in order to progress the grade resistivity characteristics, by adding an ethanol solution of $Mn(NO_3){\cdot}6H_2O$ was investigated. The ceramics was fabricated by wet-mill method. The sintering temperature read 1300-1350$[^{\circ}C]$ and the holding time was 3 hours. The quantity of $Sb_2O_3$ and $Al_2O_3$ for an activation of the far-infrared radiation in ceramics was doped. In sintering, R-T property was measured by varying the grade temperature. The anatase-lighting apparatus and microstructures by using XRD and SEM were observed. $Sb_2O_3$. oxides additive. affected the semiconducting and emissivity and MnO was devoted an increase of resistivity. The specimen which only $Sb_2O_3$ is added to was high appeared far-infrared emissivity and Mno was not affacted the far-infrared radiation. The ceramics shows that it is effective in the structure of the human bodies as organic bodies and can be applied as electron device.

• 디지털콘텐츠학회 논문지
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• 제7권4호
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• pp.287-294
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• 2006

대량 주문 생산은 의류 시장에서 고속으로 성장하는 분야이다. 의류 대량 주문 생산 분야에서 2D 가상 착의 시스템은 생산하기 전에 의류를 판매하는 것을 가능하게 해주고 제품 개발과 제조와 관련된 시간과 비용을 절감할 수 있도록 지원하는 비주얼 도구들 중 하나이다. 본 논문은 2D 실사 기반 가상 착의 시스템의 직물 컬러 매핑 방법에 관한 것이다 제안된 방법은 의류 모델 영상에서 영역 성장 기법을 통해 원하는 의류 형상을 분할한 후, 분할된 의류 형상 영역의 명도 차분 맵에 기반하여, 사용자가 선택한 새로운 직물 컬러를 해당 의류 형상 영역에 매핑시킨다. 2D 가상 착의 시스템에서 제안된 방법을 이용할 경우, 모델 의류의 컬러나 명도에 관계없이, 선택된 의류 형상 영역의 음영 및 조명 특성을 유지하면서 직물 컬러를 가상적으로 변경시킬 수 있다. 또한 각기 다른 스타일 혹은 전체 차림새를 위한 다양한 직물 컬러 조합을 신속하고 용이하게 시뮬레이션하고 비교 선택할 수 있다.