• 펄프종이기술
• /
• 제36권2호
• /
• pp.39-46
• /
• 2004

In this paper, the effects of roll diameter and storage time in roll form, bending method and relative humidity on curl in copy paper and inkjet coated papers are investigated. In copy paper, more MD curl is showed at smaller roll diameter and the extension of bending time. However CD curl is hardly influenced by roll diameter and bending time. At high relative humidity, especially CD curl largely reduces. All inkjet coated papers without the primary or the secondary back coating during papermaking show the increase in MD curl and slight decrease in CD curl by MD bending regardless of the winding methods(TSO, TSI). The water spray as back coating results in the remarkable reduction of CD curl regardless of the winding methods. Drying on flat dryer after spraying the moisture on back side display the most excellent effect on the reduction of CD curl.

• International journal of advanced smart convergence
• /
• 제8권2호
• /
• pp.170-182
• /
• 2019

In this paper, we use scratch to design and develop non-formal learning experiences that are linked with contents of secondary science textbook to educational programs. The goal of this paper is to develop a convenient and interesting program for non-formal learning in a learning environment using various smart device. Theoretical approaches to mobile education, such as smartphones, and smart education support policies continue to lead to various research efforts. Although most of the smart education systems developed for students who have difficulty in academic performance are utilized, they are limited to general students. To solve the problem, the learning environment was implanted by combining the scratch, which is an educational programming that can be easily written. The science education program proposed in this paper shows the result of process of programming using ICT device using scratch programming. In the evaluation stage, we were able to display the creations and evaluate each other, so that we could refine them more by sharing the completed ideas.

• 한국자원식물학회:학술대회논문집
• /
• 한국자원식물학회 2021년도 춘계학술대회
• /
• pp.3-3
• /
• 2021

The ongoing global pandemic caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has not only influenced over 1.26 billion people but also caused 2.77 million deaths worldwide (as of March 28, 2021). The vaccination could be the most efficient strategy to prevent SARS-CoV-2 infection. However, the continuous emergence of novel variants such as VUI-202012/01 (United Kingdom) and 501.V2 (South Africa) raises huge concerns about the effectiveness of the vaccine designed to target the original virus strain. Since ancient times regardless of the East and West, the plants which refered in this presentation have been consumed not only as food but also as a natural medicine to treat diverse diseases including infectious diseases. Importantly, these plants contain secondary metabolites that display antiviral activity involved in the inhibition of viral adsorption, penetration, and replication. Also, plant-derived natural medicines are expected to have a wider range of efficacy and fewer side effects than synthetic medicine, discovering novel plant-based viral agents would be a promising strategy to fight against SARS-CoV-2.

• 한국식품영양과학회지
• /
• 제45권3호
• /
• pp.402-408
• /
• 2016

생표고버섯 생산 농가에서 일반 판매처까지 보관 및 유통 단계를 거치면서 변화하는 온도 조건에 노출된 제품의 품질을 향상하기 위해 1차 개별포장과 2차 포장을 결합한 active 마스터 포장 시스템을 적용하였다. 외부 2차 포장에는 이산화탄소 흡수제인 $Ca(OH)_2$와 수분 흡수제인 고흡수성 고분자를 sachet 형태로 만들어 포장에 적용했다. 낮은 온도로 유지되는 저장단계에서는 1차 개별포장과 2차 포장의 결합한 형태로 수송 및 유통되고, 높은 온도에 노출되는 판매단계에서는 2차 포장을 해체한 후 판매가 진행되도록 하였다. 판매단계에서 2차 포장을 해체하면 온도 상승으로 인한 호흡 증가로 포장 내 산소 고갈과 높은 농도의 이산화탄소 축적을 막을 수 있으며, 급격한 생리장해를 억제할 수 있다. 수송 및 저장 단계에서 포장 내 기체조성과 온습도를 측정하고, 판매단계에서 포장을 개봉하여 생표고버섯의 품질을 측정하였다. 관행적인 방법인 통기성 천공 포장을 대조구로 하여 같은 조건으로 수송 및 유통, 판매를 통해 처리구 포장의 품질과 비교하였다. 이산화탄소 흡수제인 $Ca(OH)_2$와 수분 흡수제인 고흡수성 고분자를 봉지 형태로 만들어 함입시킨 active 마스터 포장 시스템은 유통 저장 단계에서 포장의 기체 이동과 이산화탄소 흡수제의 효과로 인하여 개별 포장내에 산소 농도가 9~11%, 이산화탄소 농도가 1~4% 범위를 얻을 수 있어서 품질보존에 도움이 되는 변형기체가 형성되었다. 처리구 간에 따른 경도와 표면색택, 호기성 세균수 등의 품질 변화에 대해서는 유의적인 차이를 확인할 수 없었으나, 대조구에 비해 이산화탄소 흡수제와 수분 흡수제의 처리구가 부패율 감소와 곰팡이/효모수의 성장억제 효과를 얻을 수 있었다. 농가에서 포장 전 예건처리를 할 수 없는 상황이기 때문에 계절적인 요인에 따라 이산화탄소 흡수제와 수분 흡수제의 양을 조절한다면 active 마스터 포장 시스템의 효과를 볼 수 있을 것으로 생각한다.

• 조명전기설비학회논문지
• /
• 제24권2호
• /
• pp.106-112
• /
• 2010

플라즈마 디스플레이 패널(Plasma Hsplay Panel :PDP)이 다른 평판 디스플레이 분야(Liquid Crystal Displays(LCDs) and organic light emitting diodes(OLEDs)등)와 경쟁에서 이기기 위해서는 제품의 고화질화, 저소비전력와 고속구동 등의 성능향상이 필요하다. 본 논문에서는 PDP의 성능향상을 위하여 유전체 보호층으로 쓰이는 MgO 박막에 Fe를 미량 첨가한 박막을 증착하고, 그 특성에 대하여 연구하였다. e-beam 증착법으로 증착된 Fe 도핑 된 MgO 박막의 표면특성과 전기광학적 특성을 4인치 테스트 패널을 제작하여 연구하였다. Fe가 도핑된 MgO 박막을 가지는 PDP는 Fe가 도핑되지 않은 PDP에 비해 낮은 방전전압 특성을 나타내었으며, 이는 박막에서 측정된 2차전자방출계수의 실험결과와 잘 일치되었다. 증착된 박막의 결정성과 표면 거칠기는 XRD 와 AFM 측정방법을 통하여 결정되었다. 또한, Fe가 도핑된 PDP는 고속구동을 위한 향상된 어드레스 방전 늦음의 특성을 나타내었다.

• 대한인간공학회지
• /
• 제32권1호
• /
• pp.9-16
• /
• 2013

Objective: The aim of this study is to investigate a trend of human error types observed in a series of verification and validation experiments for an Advanced Control Room(ACR) equipped with Lager Display Panel(LDP), Work Station Flat Panel Display(WS FPD), list type Alarm System(AS), Soft Control(SC) and Computerized Procedure System(CPS). Background: Operator behaviors in a fully computerized control room are quite different from those in a traditional hard-wired control room. Operators in an ACR all together monitor plant status and variables through their own interface system such as LDP and WS FPD, are notified of abnormal plant status through their own list type AS, control the plant through their own SC, and follow the structured procedure through their own CPS whereas operators in a traditional control room only separately do their duty directed by their supervisor. Especially the secondary task such as manipulating the user interface of ACR can be an extra burden to all the operators including the supervisor. Method: The Reason's human error classification method was applied to operators' behavioral data collected from a series of verification and validation experiments where operators showed their plant operational behaviors under a couple of harsh scenarios using the ACR simulator. Results: As operators accustomed to the new ACR system, knowledge or rule based mistakes appearing frequently in the early series of experiments decreased drastically in the latest stage of the series. Slip and lapse types of errors were observed throughout the series of experiments. Conclusion: Education and training can be one of the most important factors for the operators accustomed to the traditional control room to be adapted to the new system and to run the ACR successfully. Application: The results of this study implied that knowledge or rule based mistakes can be reduced by training and education but that lapse type errors might be reduced only through innovative improvement in human-system interface design or teamwork culture design including a new leadership style suitable for ACR.

• 한국정보통신학회논문지
• /
• 제19권10호
• /
• pp.2417-2422
• /
• 2015

색상을 이용한 Mean-Shift 추적 알고리즘은 배경이 객체와 유사한 색상을 가질 때 객체 추적을 실패하는 문제가 있다. 본 논문은 색상 대신 새로운 조합 데이터 이용해 개선된 Mean-Shift 추적 알고리즘을 제안하고 있다. 새로운 데이터는 서로의 상관도가 낮은 색상과 채도의 적응적인 조합으로 생성된다. 즉, 제안된 알고리즘은 객체와 배경을 잘 구분되는 주 색요소와 그렇지 않은 부 색요소 선택하고, 주 색요소와 부 색요소의 상위 4 비트를 각각 조합 데이터의 상위 4비트와 하위 4 비트에 할당한다. 제안된 알고리즘은 배경이 객체와 유사한 색상을 갖는 추적 환경에서도 채도를 주 색요소로 선택함에 의해 추적 오차를 최대 2.0~4.2 화소, 평균 0.49~1.82 화소를 유지하면서 적절하게 객체를 추적한다.

• 한국전기전자재료학회:학술대회논문집
• /
• 한국전기전자재료학회 1996년도 춘계학술대회 논문집
• /
• pp.59-62
• /
• 1996

Plasma displays (PDP) as a large area wall-hanging display device are rabidly developed with flat CRT, TPT LCD and etc. Especially, AC Plasma Display Panels(AC PDPs) have the inherent memory function which is effective for large area displays. The memory function in AC PDPs is caused by the accumulation of the electrical charge on the protecting layer formed on the dielectric layer. This MgO protective layer prevents the dielectric layer from sputtering by ion in discharge plasma and also has the additional important roll in lowering the firing voltage due to the large secondary electron emission coefficient). Until now, the MgO Protective layer is mainly formed by E-Beam evaporation. With increasing the panel size, this process is difficult to attain cost reduction, and are not suitable for large quantity of production. To the contrary, the methode of shuttering are easy to apply on mass production and to enlarge the size of the panel and shows the superior adhesion and uniformity of thin film. In this study, we have prepared MgO protective layer on AC PDP Cell by reactive magnetron sputtering and studied the effect of MgO layer on the surface discharge characteristics of ac PDP.

• 센서학회지
• /
• 제16권6호
• /
• pp.441-448
• /
• 2007

In this study, the fiber-optic fluoro-immunosensor was designed to detect foodborne pathogens. The fabricated system is composed of the multimode optical fiber on which antibodies are immobilized. Then, a sandwich immunoassay is applied to the fabricated the fiber-optic fluoro-immunosensor. In the "sandwich" binding format, a primary or "capture" antibody is immobilized on the core surface of the multimode optical fiber and a secondary or named as "tracer" antibody is added to the bulk solution. A tracer is labeled FITC (fluorescein isothiocyanate; ${\lambda}ex$=492 nm, ${\lambda}em$= 520 nm). Different concentrations of antigens are tested in different fibers. The detection limit of the fabricated system is 5.08×103 cfu/ml for Vibrio antigen and $0.1{\mu}g/ml$, $0.05{\mu}g/ml$ in non-labeled monolayer phosphate buffered saline (NMP), non-labeled monolayer carbonate bicarbonate buffer (NMC), respectively.

• 한국표면공학회지
• /
• 제48권6호
• /
• pp.322-328
• /
• 2015

We investigated the diffusion behaviors, electrical properties, microstructures, and composition of In-Ga-Zn-O (IGZO) oxide thin films deposited by radio frequency reactive magnetron sputtering with increasing annealing temperatures. The samples were deposited at room temperature and then annealed at 300, 400, 500, 600 and $700^{\circ}C$ in air ambient for 2 h. According to the results of time-of-flight secondary ion mass spectrometry and X-ray photoelectron spectroscopy, no diffusion of In, Ga, and Zn components were observed at 300, 400, 500, $600^{\circ}C$, but there was a diffusion at $700^{\circ}C$. However, for the sample annealed at $700^{\circ}C$, considerable diffusion occurred. Especially, the concentration of In and Ga components were similar at the IGZO thin film but were decreased near the interface between the IGZO and glass substrate, while the concentration of Zn was decreased at the IGZO thin film and some Zn were partially diffused into the glass substrate. The high-resolution transmission electron microscopy results showed that a phase change at the interface between IGZO film and glass substrate began to occur at $500^{\circ}C$ and an unidentified crystalline phase was observed at the interface between IGZO film and glass substrate due to a rapid change in composition of In, Ga and Zn at $700^{\circ}C$. The best values of electron mobility of $15.5cm^2/V{\cdot}s$ and resistivity of $0.21{\Omega}cm$ were obtained from the sample annealed at $600^{\circ}C$.