• 제목/요약/키워드: research instruments

검색결과 1,681건 처리시간 0.031초

Optical Performance Measurement of the MATS Satellite

  • Park, Woojin;Hammar, Arvid;Lee, Sunwoo;Chang, Seunghyuk;Pak, Soojong
    • 천문학회보
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    • 제43권1호
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    • pp.49.1-49.1
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    • 2018
  • The MATS (Mesosphere Airglow/Aerosol Tomography Spectroscopy) satellite is the next Swedish science microsatellite. We report optical performance test results of the limb telescope, which is the major payload. This telescope is designed with "linear astigmatism-free" (LAF) off-axis optical system in order to have high optical performance across the wide field of view. We measured Modulation Transfer Function (MTF) and Encircled Energy Diameter (EED) of the limb telescope. Full field imaging tests show expected results without linear astigmatism across the full field of view ($5.67^{\circ}{\times}0.91^{\circ}$). Since the amount of stray light is from the earth and the sun, we also simulated and measured the stray light in the field image.

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Optical Setup for Full-Field Imaging Test of MATS Limb Telescope

  • Lee, Sunwoo;Hammar, Arvid;Park, Woojin;Chang, Seunghyuk;Pak, Soojong
    • 천문학회보
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    • 제43권1호
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    • pp.68.3-68.3
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    • 2018
  • The MATS (Mesosphere Airglow / Aerosol Tomography Spectroscopy) satellite is a Swedish scientific microsatellite which Kyung Hee University participates in developing. The limb telescope of the MATS satellite is designed with linear astigmatism-free off axis optical configuration which allows wide field of view ($5.67^{\circ}{\times}0.91^{\circ}$). Here we present the full-field optical performance test setup that consists of a point source, a collimator, the limb telescope and a CCD (Charged Coupled Device). The incidence angle of the collimator was carefully controlled by the rotary stage under the limb telescope. The imaging tests represent expected results without dominant aberrations.

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광대역 교류 자기센서 특성 시험장치 설계에 관한 연구 (A Study on the System Design for Measuring the Property of Broadband AC Magnetic Sensors)

  • 정현주;양창섭;정우진
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2015년도 제46회 하계학술대회
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    • pp.685-686
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    • 2015
  • This paper describes design results of the measurement system to test the properties of broadband AC magnetic field sensors used in weapon system. This measurement system consists of 3-axis helmholtz coil, signal generator, signal amplifier, sensor data acquisition unit and measurement & analysis controller including the operating software. This system is able to measure various properties of AC magnetic field sensor such as sensitivity, linearity and dynamic response in the frequency of 1 Hz to 10 kHz. The performance of this system was verified by measuring and analyzing the property of a MAG 639, standard magnetic field sensor of bartington instruments, with this developed system.

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Raman Chemical Imaging Technology for Food and Agricultural Applications

  • Qin, Jianwei;Kim, Moon S.;Chao, Kuanglin;Cho, Byoung-Kwan
    • Journal of Biosystems Engineering
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    • 제42권3호
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    • pp.170-189
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    • 2017
  • Purpose: This paper presents Raman chemical imaging technology for inspecting food and agricultural products. Methods The paper puts emphasis on introducing and demonstrating Raman imaging techniques for practical uses in food analysis. Results & Conclusions: The main topics include Raman scattering principles, Raman spectroscopy measurement techniques (e.g., backscattering Raman spectroscopy, transmission Raman spectroscopy, and spatially offset Raman spectroscopy), Raman image acquisition methods (i.e., point-scan, line-scan, and area-scan methods), Raman imaging instruments (e.g., excitation sources, wavelength separation devices, detectors, imaging systems, and calibration methods), and Raman image processing and analysis techniques (e.g., fluorescence correction, mixture analysis, target identification, spatial mapping, and quantitative analysis). Raman chemical imaging applications for food safety and quality evaluation are also reviewed.

Evaluating Innovation Policies in Australian Government: BACKING AUSTRALIA'S ABILITY

  • 문용은
    • 한국디지털정책학회:학술대회논문집
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    • 한국디지털정책학회 2003년도 창립학술대회
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    • pp.101-114
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    • 2003
  • In industrialised countries, innovation is a key source of economic growth. Research is a key driver of technological innovation and involves the process of systematic investigation and/or experimentation to discover new knowledge. The Governments' industry innovation policy supports a business focus on Research and Development (R&D) through a range of programs in order to achieve these aims. The Innovation Statement, launched by the Australian Prime Minister in January 2001, commits an additional $3 billion over five years to encourage and support innovation. The Australian Government aims to build world competitive firms and strong research capability in industry to strengthen Australia's international competitiveness and increase national prosperity. It develops policies and programs to enhance investment in innovation. The Australian Government also undertakes analysis and comparisons of innovation policies, instruments and approaches to maintain a leading-edge National Innovation System. This includes analysis of the innovation activities of other nations, and evaluation of the impacts of innovation policies and programs on Australia's institutions and enterprises. This paper examines Australia's Innovation policies, Backing Australian Ability.

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삶의 질 측정도구의 개괄 및 한의학에서의 이용 (An Overview of HRQOL (Health Related Quality of Life) Instrument and Application in Oriental Medicine)

  • 정태영;조정효;손창규
    • 대한한의학회지
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    • 제31권2호
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    • pp.64-70
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    • 2010
  • Objective: This study aimed to construct an overview of health-related quality of life (HRQOL) scales for application in studies of traditional Korean medicine (TKM). Methods: We analyzed all HRQOL scales from the PROQOLID web site (www.proqolid.org) regarding to classification, application purposes, and translation to Korean version. We also searched clinical studies focused on "Quality of Life" using TKM. Results: A total of 660 HRQOL instruments were analyzed; 99 were for general condition while 559 were disease-specific. Twenty clinical studies for TKM were conduced using HRQOL scales. Conclusion: The adaptation of the international HRQOL instrument is strongly recommended in TKM-associated clinical study, and development of a TKM-specific HRQOL scale is needed for globalization of TKM.

Evaluating Innovation Policies in Australian Government: Backing Australia's Ability

  • 문용은;조셉윤
    • 디지털융복합연구
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    • 제1권1호
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    • pp.31-44
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    • 2003
  • In industrialised countries, innovation is a key source of economic growth. Research is a key driver of technological innovation and involves the process of systematic investigation and/or experimentation to discover new knowledge. The Governments' industry innovation policy supports a business focus on Research and Development (R&D) through a range of programs in order to achieve these aims. The Innovation Statement, launched by the Australian Prime Minister in January 2001, commits an additional 53 billion over five years to encourage and support innovation. The Australian Government aims to build world competitive firms and strong research capability in industry to strengthen Australia's international competitiveness and increase national prosperity. It develops policies and programs to enhance investment in innovation. The Australian Government also undertakes analysis and comparisons of innovation policies, instruments and approaches to maintain a leading-edge National Innovation System. This includes analysis of the innovation activities of other nations, and evaluation of the impacts of innovation policies and programs on Australia's institutions and enterprises. This paper examines Australia's Innovation policies, Backing Australian Ability.

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효율적 해양탐사를 위한 해양조사선의 종합정보 통신망 구현 (An Implementation of Integrated Information and Communication Network of Oceanographic Research Vessels for Effective Ocean Investments)

  • 박종원;최영철;강준선;임용곤;김시문
    • 한국해양공학회:학술대회논문집
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    • 한국해양공학회 2003년도 춘계학술대회 논문집
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    • pp.330-335
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    • 2003
  • This paper deals with the network interface of research and observation instruments in the oceanographic research vessel with an establishment of related database for measured information. The system is implemented to integrated communication network system which allows to effective survey by using real time observation and GUI(Graphic User Interface). The system also consists of the LAN systems and serial interface to link chemical, physical, biological and environmental relations. And, other network service and vessel data service for data communication between vessel and earth station such as INMARSAT-B, WWW service, BBS, E-Mail etc., are needed for integrated communication network system.

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Analysis of Entamoeba histolytica Membrane via LC-MALDI-TOF/TOF

  • Ujang, Jorim Anak;Noordin, Rahmah;Othman, Nurulhasanah
    • Mass Spectrometry Letters
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    • 제10권3호
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    • pp.84-87
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    • 2019
  • Liquid chromatography mass spectrometry is widely employed in proteomics studies. One of such instruments is the Liquid Chromatography (LC)-Matrix-assisted laser desorption ionisation (MALDI)-Time of flight (TOF) or LC-MALDI-TOF/TOF. In this study, this instrument was used to identify the membrane proteins of a protozoan parasite namely Entamoeba histolytica. It causes amoebiasis in human. The E. histolytica trophozoites were cultured prior to the membrane protein extraction using the conventional method, $ProteoPrep^{(R)}$ and $ProteoExtract^{(R)}$ kits. Then, the membrane protein extracts were trypticdigested and analysed by LC-MALDI-TOF/TOF. Approximately, 194 proteins were identified and 27.8% (54) were predicted as membrane proteins having 1 to 15 transmembrane regions and signal peptides by combining all three extraction methods. Also, this study has discovered 3 unique proteins as compared to our previous study which merit further investigation.

방사선 스펙트럼 계측기 (Multi-Channel Analyzer)의 Live-Time 보상회로에 관한 연구 (A Study on Electronic Circuit for Liwe-Time Correction in Multi-Channel Analyzer : Survey and Analysis)

  • 황인구;권기춘;송순자
    • Nuclear Engineering and Technology
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    • 제27권5호
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    • pp.784-791
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    • 1995
  • 방사선계측에서는 방사선검출기(detector)로부터 나오는 pulse를 처리하는 데 있어서 pulse의 counting 손실이 발생한다. 이 손실을 최소화하거나 보상하기 위한 여러가지 방법들이 제시되어 왔으나, 아직도 절대적인 해답이 확립되지 않은 실정이다. 본 연구에서는 기 제시된 보상알고리즘들을 그 기능을 구현하는 전자회로와 함께 기술하고 특징을 분석하였다. 또한 본 연구를 통해 pulse의 counting손실을 보상하는 한가지 알고리즘 개선방향을 제시하였다.

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