Electromechanical Properties of Graphene Drumheads

Klimov, N. N.,Jung, S.,Zhu, S.,Li, T.,Wright, C. A.,Solares, S. D.,Newell, D. B.,Zhitenev, N. B.,Stroscio, J. A. American Association for the Advancement of Scienc 2012 Science Vol.336 No.6088

<P>We determined the electromechanical properties of a suspended graphene layer by scanning tunneling microscopy (STM) and scanning tunneling spectroscopy (STS) measurements, as well as computational simulations of the graphene-membrane mechanics and morphology. A graphene membrane was continuously deformed by controlling the competing interactions with a STM probe tip and the electric field from a back-gate electrode. The probe tip-induced deformation created a localized strain field in the graphene lattice. STS measurements on the deformed suspended graphene display an electronic spectrum completely different from that of graphene supported by a substrate. The spectrum indicates the formation of a spatially confined quantum dot, in agreement with recent predictions of confinement by strain-induced pseudomagnetic fields.</P>

The VISTA Deep Extragalactic Observations (VIDEO) survey★

Jarvis, Matt J.,Bonfield, D. G.,Bruce, V. A.,Geach, J. E.,McAlpine, K.,McLure, R. J.,Gonzá,lez-Solares, E.,Irwin, M.,Lewis, J.,Yoldas, A. Kupcu,Andreon, S.,Cross, N. J. G.,Emerson, J. P.,Dalton, Oxford University Press 2013 Monthly notices of the Royal Astronomical Society Vol.428 No.2

THE SOLAR-B MISSION

ICHIMOTO KIYOSHI,TEAM THE SOLAR-B The Korean Astronomical Society 2005 Journal of The Korean Astronomical Society Vol.38 No.2

The Solar-B is the third Japanese spacecraft dedicated for solar physics to be launched in summer of 2006. The spacecraft carries a coordinated set of optical, EUV and X-ray instruments that will allow a systematic study of the interaction between the Sun's magnetic field and its high temperature, ionized atmosphere. The Solar Optical Telescope (SOT) consists of a 50cm aperture diffraction limited Gregorian telescope and a focal plane package, and provides quantitative measurements of full vector magnetic fields at the photosphere with spatial resolution of 0.2-0.3 arcsec in a condition free from terrestrial atmospheric seeing. The X-ray telescope (XRT) images the high temperature (0.5 to 10 MK) corona with improved spatial resolution of approximately 1 arcsec. The Extreme Ultraviolet Imaging Spectrometer (EIS) aims to determine velocity fields and other plasma parameters in the corona and the transition region. The Solar-B telescopes, as a whole, will enable us to explore the origins of the outer solar atmosphere, the corona, and the coupling between the fine magnetic structure at the photosphere and the dynamic processes occurring in the corona. The mission instruments (SOT/EIS/XRT) are joint effort of Japan (JAXA/NAO), the United States (NASA), and the United Kingdom (PPARC). An overview of the spacecraft and its mission instruments are presented.

국내 우주환경 자료 보유 현황: 태양·행성간 공간

오수연,이진이,한국우주과학회 태양우주환경분과,Oh, Suyeon,Lee, Jin-Yi,Division of Solar and Space Environment of KSSS, 한국우주과학회 2021 우주기술과 응용 Vol.1 No.2

The Solar and Space Environment Division of the Korean Space Science Society investigated the use and possession of ground and satellite observations and models of solar and planetary data operated by domestic research institutes and universities. Based on the findings, we would like to introduce observational instruments, data, and models in solar and interplanetary fields in this paper to improve understanding and use of each data and explore opportunities for interdisciplinary research. The ground and satellite observations, which require a lot of investment, were mainly held by research institutes (National Meteorological Satellite Center, Polar Research Institute, Korean Space Weather, Korea Astronomy and Space Science Institute and KAIST Satellite Research Institute), and model development was overwhelmingly carried out at Kyung Hee University. In solar and interplanetary fields, we introduce Fast Imaging Solar Spectrograph (FISS), neutron monitors, and the analysis models [for the Solar Dynamics Observatory/Atmospheric Imaging Assembly (SDO/AIA) and Hinode/X-Ray Telescope (XRT) observations] in nonequilibrium ionization state as representatives. Survey on solar and interplanetary fields can be downloaded from the website of the Korean Space Science Society (http://ksss.or.kr/). The paper makes know the importance of long-term and continuous management of space science-related materials, and hopes to contribute to enhancing the status of domestic space science data by utilizing locally produced data by various personnel participating in space science research. 한국우주과학회 태양우주환경분과에서 국내 연구소와 대학에서 운영 중인 태양 및 행성간의 자료를 지상관측기, 위성 및 모델에 대한 보유 및 활용에 대한 조사를 실시하였다. 조사 결과를 바탕으로 각 자료에 대한 이해와 활용도를 높이고, 분야 간 융합 연구 기회를 모색하고자 본 논문에서 태양 및 행성간 분야의 관측 자료와 모델을 소개하고자 한다. 투자가 많이 필요한 지상 관측기 및 위성 분야는 주로 연구소(국가기상위성센터, 극지연구소, 우주전파센터, 한국천문연구원 및 KAIST 인공위성연구소)에서 자료를 보유하고 있었으며, 모델 개발은 경희대학교에서 압도적으로 수행하였다. 태양 및 행성간 분야에서 고속태양분광기(Fast Imaging Solar Spectrograph, FISS), 우주선 중성자 관측기 및 이온화 비평형 상태 Solar Dynamics Observatory/Atmospheric Imaging Assembly(SDO/AIA)와 Hinode/X-Ray Telescope(XRT) 온도 대응 함수 모델을 대표로 소개한다. 태양 및 행성간 분야의 자료에 대한 조사 내용은 한국우주과학회 홈페이지에서 다운로드할 수 있다(http://ksss.or.kr/). 이 논문이 우주과학 관련 자료에 대한 장기적이고 연속적인 관리에 대한 중요성을 인식하며, 우주과학 연구에 참여하는 다양한 인력들이 참조하여 국내에서 생산되고 있는 자료를 활용하여 국내 우주과학 자료의 위상을 높이는 데 기여하기를 희망한다.

태양열 이용 전화국 기본 설계연구

한국태양에너지학회(Korean Solar Energy Society) 한국태양에너지학회 1992 한국태양에너지학회 논문집 Vol.12 No.1

본 연구의 진행은 자연형 태양열 시스템의 검토, 그리고 태양열 냉?난방시스템 분류 및 실태조사, 끝으로 태양열이용전화국 기본설계도면 제시의 순으로 하였다. 그런데, 태양열이용전화국 기본설계는 능률적 업무 흐름에 따른 공간계획 및 시설계획을 수립하여, 그리고 무엇보다도 에너지를 절약함과 동시에 대체에너지중 하나인 태양열을 보다 적극적으로 이용한 건물이 되도록 계획하였다. The present study has been carried out to investigate various passive solar technologies for their possible application to telecommunications office buildings. HVAC systems utilizing the solar energy are analyzed in this regard to elicit the most feasible design. The proposed design is unique, for it has been devised to promote the working spirit with an efficient space planning as well.

전화국 환경 개선에 관한 연구

한국태양에너지학회,Korean Solar Energy Society, Korean Solar Energy Society 한국태양에너지학회 1991 한국태양에너지학회 논문집 Vol.11 No.2

대체에너지 시스템을 적용한 전화국의 건립을 위한 기초연구로써 먼저 우리나라 전화국의 실태 및 선진 일본의 전화국 현황등을 살폈고, 또한 향후 전화국 건물의 발전전망에 대하여 고찰하면서, 대체에너지 시스템의 여러분야에 대하여 검토하였다. This study has been carried out as a groundwork for the application of various solar systems to new telecommunications office buildings. A survey has been done to examine the present conditions of these buildings throughout the country. The exemplar cases of Japan are also studied, which provided useful feedbacks to our needs. The results of the present study could be used in developing the most appropriate(energy efficient) model for these buildings.

유적 관리와 보존

기올라 솔라(Giora Solar) 충청남도역사문화연구원 2015 충청학과 충청문화 Vol.21 No.1

KASI’s contributions to Space Weather over the past 10 years

Kyungsuk Cho,Young-Deuk Park,Solar,Space Weather Group 한국천문학회 2015 天文學會報 Vol.40 No.1

Statistical Study and Prediction of Variability of Erythemal Ultraviolet Irradiance Solar Values in Valencia, Spain

Gonzalo Gurrea,Vicente Blanca-Giménez,Vicente Pérez,María-Antonia Serrano,Juan-Carlos Moreno,Solar Radiation Group of the Universitat Politècnica de València 한국기상학회 2018 Asia-Pacific Journal of Atmospheric Sciences Vol.54 No.4

The goal of this study was to statistically analyse the variability of global irradiance and ultraviolet erythemal (UVER) irradiance and their interrelationships with global and UVER irradiance, global clearness indices and ozone. A prediction of short-term UVER solar irradiance values was also obtained. Extreme values of UVER irradiance were included in the data set, as well as a time series of ultraviolet irradiance variability (UIV). The study period was from 2005 to 2014 and approximately 250,000 readings were taken at 5-min intervals. The effect of the clearness indices on global irradiance variability (GIV) and UIV was also recorded and bi-dimensional distributions were used to gather information on the two measured variables. With regard to daily GIVand UIV, it is also shown that for global clearness index (kt) values lower than 0.6 both global and UVER irradiance had greater variability and that UIVon cloud-free days (kt higher than 0.65) exceeds GIV. To study the dependence between UIVand GIV the χ2 statistical method was used. It can be concluded that there is a 95% probability of a clear dependency between the variabilities.A connection between high kt (corresponding to cloudless days) and low variabilities was found in the analysis of bidimensional distributions. Extreme values of UVER irradiance were also analyzed and it was possible to calculate the probable future values of UVER irradiance by extrapolating the values of the adjustment curve obtained from the Gumbel distribution.

국내 우주환경 자료 보유 현황: 전리권/고층대기

이창섭,이우경,한국우주과학회 태양우주환경분과,Lee, Changsup,Lee, Woo Kyoung,Division of Solar and Space Environment of KSSS, 한국우주과학회 2021 우주기술과 응용 Vol.1 No.2

한국우주과학회 태양우주환경분과에서는 국내 우주환경 관측 자료 활용도를 높이고, 분야 간 융합 연구 기회를 모색하기 위해 국내 연구소와 대학에서 활용 중인 태양, 자기권, 전리권/고층대기 자료 현황을 조사하였다. 자료는 관측 방식에 따라 지상과 위성 자료로 분류하였고, 개발 또는 활용 중인 모델 정보도 포함한다. 이 논문에서는 조사 결과를 바탕으로 극지연구소와 한국천문연구원에서 운영하는 전리권/고층대기관측기 현황과 자료 설명 및 활용 방법 등을 소개한다. 극지연구소에서는 남극 장보고과학기지와 세종과학기지, 그리고 북극 다산과학기지에 전천 카메라, 페브리-페로 간섭계, 이오노존데 등을 설치해 운영 중이다. 한국천문연구원은 보현산천문대 전천카메라와 충남 계룡대 VHF(Very High Frequency)/유성 레이더를 운영하고 있으며, 국내 40여 개 GNSS(Global Navigation Satellite System) 관측소에서 수집한 자료를 사용해 전리권 전자밀도 정보(total electron content)를 산출하고 있다. 또한 보현산천문대와 탐라 KVN천문대에 GNSS 신틸레이션 수신기를 설치해 전리권 교란을 관측하고 있다. 현재 관측 자료들은 웹 페이지나 FTP, 또는 요청을 통해 이용할 수 있다. 이 밖에 논문에 담지 않은 기타 전리권/고층대기 분야 자료 현황은 한국우주과학회 홈페이지에서 다운로드할 수 있다(http://ksss.or.kr/). 이 논문을 통해 우주과학 연구자들이 우주과학 자료에 대한 장기적이고 연속적인 관리의 중요성을 인식하고, 국내에서 생산 중인 자료의 활용도와 신뢰도를 높이는 데 이바지할 수 있길 기대한다. 더불어 국내 관측 자료의 활용을 극대화하기 위한 새로운 데이터 공유 체계에 관한 논의를 시작하는 계기가 되길 바란다. In 2020, the solar and space environment division at the Korea Space Science Society surveyed the status of data archives in solar physics, magnetosphere, and ionosphere/upper atmosphere in Korea to promote broader utilization of the data and research collaboration. The survey includes ground- and satellite-based instruments and developing models by research institutes and universities in Korea. Based on the survey results, this study reports the status of the ground-based instruments, data products in the ionosphere and upper atmosphere, and documentation of them. The ground-based instruments operated by the Korea Polar Research Institute and Korea Astronomy and Space Science Institute include ionosonde, Fabry-Perot interferometer in Arctic Dasan stations, Antarctic King Sejong/Jang Bogo stations, and an all-sky camera, VHF radar in Korea. We also provide information on total electron content and scintillation observations derived from the Global Navigation Satellite System (GNSS) station networks in Korea. All data are available via the webpage, FTP, or by request. Information on ionospheric data and models is available at http://ksss.or.kr. We hope that this report will increase data accessibility and encourage the research community to engage in the establishment of a new Space Science Data Ecosystem, which supports archiving, searching, analyzing, and sharing the data with diverse communities, including educators, industries, and the public as wells as the research scientist.