• 한국수학교육학회지시리즈B:순수및응용수학
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• 제28권3호
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• pp.199-215
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• 2021

The purpose of this paper is to define and study some new classes of sets by using nano operation namely, ζ-nano regular open, ζ-nano open, ζ-nano α-open, ζ-nano pre-open, ζ-nano semi-open, ζ-nano b-open and ζ-nano β-open in nano topology. Some properties and the relationships between these sets and the related concepts are investigated. Also, we found the deciding factors for the most common disease fever.

• Journal of applied mathematics & informatics
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• 제41권3호
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• pp.525-540
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• 2023

In this paper, we introduce the concept of fuzzy nano M open and fuzzy nano M closed mappings in fuzzy nano topological spaces. Also, we study about fuzzy nano M Homeomorphism, almost fuzzy nano M totally mappings, almost fuzzy nano M totally continuous mappings and super fuzzy nano M clopen continuous functions and their properties in fuzzy nano topological spaces. By using these mappings, we can able to extended the relation between normal spaces and regular spaces in fuzzy nano topological spaces.

• Current Photovoltaic Research
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• 제2권4호
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• pp.168-172
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• 2014

Under concentrated illuminations, the solar cells show higher efficiencies mainly due to an increase of the open circuit voltage. In this study, InGaP/InGaAs/Ge triple-junction solar cells have been grown by a low pressure metalorganic chemical vapor deposition. Photovoltaic characteristics of the fabricated solar cells are investigated with a class A solar simulator under concentrated illuminations from 1 to 100 suns. Ideally, the open circuit voltage should increase with the current level when maintained at the same temperature. However, the fabricated solar cells show degraded open circuit voltages under high concentrations around 100 suns. This means that the heat sink design is not optimized to keep the cell temperature at $25^{\circ}C$. To demonstrate the thermal degradation, changes of the device performance are investigated with different bonding conditions and heat sink materials.

• Bulletin of the Korean Chemical Society
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• 제27권9호
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• pp.1459-1462
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• 2006

• JSTS:Journal of Semiconductor Technology and Science
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• 제12권1호
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• pp.53-58
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• 2012

A new on-wafer de-embedding method using thru, short and open patterns sequentially is proposed to eliminate the errors of conventional methods. This "thru-short-open" method is based on the removal of the coupling admittance between input and output interconnect dangling legs. The increase of the de-embedding effect of the lossy coupling capacitance on the cutoff frequency in MOSFETs is observed as the gate length is scaled down to 45 nm. This method will be very useful for accurate RF measurements of nano-scale MOSFETs.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2007년도 하계종합학술대회 논문집
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• pp.341-342
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• 2007

The IRFPA (InfraRed Focal Plane Array) ROIC (ReadOut Integrated Circuit) was designed in folded-cascode Op-Amp using $0.35{\mu}m$ CMOS technology. As the folded-cascode has high open-loop voltage gain and fast settling time, that used in many analog circuit designs. In this paper, folded-cascode Op-Amp for ROIC of the $32{\times}32$ IRFPA has been designed. HSPICE simulation results are unit gain bandwidth of 13.0MHz, 90.6 dB open loop gain, 8 V/${\mu}m$ slew rate, 600 ns settling time and $66^{\circ}$ phase margin.

• 스마트미디어저널
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• 제11권11호
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• pp.40-48
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• 2022

본 논문에서는 인공지능교육의 어려움을 해결하기 위하여 인공지능 교육에 활용이 가능한 교육용 키트를 개발하였다. 이를 통하여 이론 중심에서 실무 위주의 경험을 학습하기 위한 CNN과 OpenCV를 이용하여 컴퓨터 비전 기술을 이용한 사람 인식(Object Detection and Person Detection in Computer Vision)과 특정 오브젝트를 학습시키고 인식시키는 사용자 이미지인식(Your Own Image Recognition), 사용자 객체 분류(Segmentation) 및 세분화(Classification Datasets), 학습된 타켓을 공격하는 IoT하드웨어 제어와 인공지능보드인 Jetson Nano GPIO를 제어함으로써 효과적인 인공지능 학습에 도움이 되는 교재를 개발하여 활용할 수 있도록 하였다.

• Bulletin of the Korean Chemical Society
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• 제33권5호
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• pp.1664-1668
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• 2012

In this study, we have expanded the applicability of the pre-established generalized preparation protocol to MIPs with a neutral template. The ($4S,5R$hyl-5-phenyl-2-oxazolidinone MIP layer was formed inside a pretreated and silanized fused silica capillary, and its chiral separation performance was examined. Optimization of chiral separation was also carried out. This is the very first report of somewhat successful application of the generalized preparation protocol to a MIP with a genuine neutral template.

• 한국초전도ㆍ저온공학회논문지
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• 제14권4호
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• pp.12-15
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• 2012

$MgB_2$ superconductor is highly sensitive to the Mg content. Even if the samples are synthesized with the appropriate looking stoichiometric ratio, the heat treatment leads to the loss of Mg either to ambiance or to MgO. To avoid it, either excess Mg is added in the starting powder or sealed ampoule annealing is employed. In this paper the effect of open Mg sintering ambiance on the ex-situ $MgB_2$ was studied to enhance its superconducting properties. The open Mg ambiance was created to avoid any overpressure of Mg by providing a hole in Fe tube used as sample holder. The decrease in resistivity of the synthesized sample was observed through the increased temperature dependence of electron-phonon interactions. A clear enhancement in the superconducting cross-sectional area and hence the in-field critical current density is obtained.

• 분석과학
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• 제30권4호
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• pp.167-173
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• 2017

In the era of the forth Industrial Revolution, open source code and open source hardware have gained much attention. In particular, 3D printing technology is expanding into the realms of classical science, technology and our daily lives. Relatedly, in the present study, we demonstrate the manufacture of a nano-LC MALDI spotter robot using 3D printing technology. The parts of the spotter robot were either made using a 3D printer or purchased as 3D printer parts from the 3D printer online market, so that anyone can make the robot without a deep knowledge of engineering or electronics, i.e., DIY (do-it-yourself) product. In the nano-LC MALDI spotter, the nano-LC eluent and MALDI matrix were mixed in a T-union and discharged from the capillary outlet. The eluent and matrix mixture could be spotted onto the movable MALDI plate. The MALDI plate was designed to translate in a two-dimensional space (xy plane), which was enabled by the movements of two stepper motors. In the paper, all computer-aided design (CAD) files for the parts and operation software are provided to help the reader manufacture their own spotter robot.