• Title/Summary/Keyword: ALADIN

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Data Assimilation of Aeolus/ALADIN Horizontal Line-Of-Sight Wind in the Korean Integrated Model Forecast System (KIM 예보시스템에서의 Aeolus/ALADIN 수평시선 바람 자료동화)

  • Lee, Sihye;Kwon, In-Hyuk;Kang, Jeon-Ho;Chun, Hyoung-Wook;Seol, Kyung-Hee;Jeong, Han-Byeol;Kim, Won-Ho
    • Atmosphere
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    • v.32 no.1
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    • pp.27-37
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    • 2022
  • The Korean Integrated Model (KIM) forecast system was extended to assimilate Horizontal Line-Of-Sight (HLOS) wind observations from the Atmospheric Laser Doppler Instrument (ALADIN) on board the Atmospheric Dynamic Mission (ADM)-Aeolus satellite. Quality control procedures were developed to assess the HLOS wind data quality, and observation operators added to the KIM three-dimensional variational data assimilation system to support the new observed variables. In a global cycling experiment, assimilation of ALADIN observations led to reductions in average root-mean-square error of 2.1% and 1.3% for the zonal and meridional wind analyses when compared against European Centre for Medium-Range Weather Forecasts (ECMWF) Integrated Forecast System (IFS) analyses. Even though the observable variable is wind, the assimilation of ALADIN observation had an overall positive impact on the analyses of other variables, such as temperature and specific humidity. As a result, the KIM 72-hour wind forecast fields were improved in the Southern Hemisphere poleward of 30 degrees.

Comparison of Wind Vectors Derived from GK2A with Aeolus/ALADIN (위성기반 GK2A의 대기운동벡터와 Aeolus/ALADIN 바람 비교)

  • Shin, Hyemin;Ahn, Myoung-Hwan;KIM, Jisoo;Lee, Sihye;Lee, Byung-Il
    • Korean Journal of Remote Sensing
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    • v.37 no.6_1
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    • pp.1631-1645
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    • 2021
  • This research aims to provide the characteristics of the world's first active lidar sensor Atmospheric Laser Doppler Instrument (ALADIN) wind data and Geostationary Korea Multi Purpose Satellite 2A (GK2A) Atmospheric Motion Vector (AMV) data by comparing two wind data. As a result of comparing the data from September 2019 to August 1, 2020, The total number of collocated data for the AMV (using IR channel) and Mie channel ALADIN data is 177,681 which gives the Root Mean Square Error (RMSE) of 3.73 m/s and the correlation coefficient is 0.98. For a more detailed analysis, Comparison result considering altitude and latitude, the Normalized Root Mean Squared Error (NRMSE) is 0.2-0.3 at most latitude bands. However, the upper and middle layers in the lower latitudes and the lower layer in the southern hemispheric are larger than 0.4 at specific latitudes. These results are the same for the water vapor channel and the visible channel regardless of the season, and the channel-specific and seasonal characteristics do not appear prominently. Furthermore, as a result of analyzing the distribution of clouds in the latitude band with a large difference between the two wind data, Cirrus or cumulus clouds, which can lower the accuracy of height assignment of AMV, are distributed more than at other latitude bands. Accordingly, it is suggested that ALADIN wind data in the southern hemisphere and low latitude band, where the error of the AMV is large, can have a positive effect on the numerical forecast model.

A Study on Service Satisfaction Factor Analysis of an On-line Secondhand Bookstore (온라인 중고서점의 서비스 만족 요인 분석에 관한 연구)

  • An, Ye-Seul;Seo, Kwang-Kyu
    • Journal of Digital Convergence
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    • v.11 no.11
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    • pp.251-256
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    • 2013
  • In the past, customers utilize a secondhand book market as a major counter for their purchasing used books. With expansion of internet and IT devices, many customers would like to buy their used books in an on-line secondhand book store which has more price competitiveness and ease. Nowadays a new concept off-line secondhand book market which has the advantages of both on-line and off-line is a growing trend instead of existing secondhand book markets in the economic recession. In this study, we established customer service satisfaction for 'Aladin store', which is the advanced concept off-line secondhand book store, with the most typical service quality test technique SERVQUAL. First, we selected appropriate service quality factor for the advanced concept off-line secondhand book market such as Aladin store. After that, we analyzed which factors are influencing repurchase intentions, through customer survey. The conclusion provides the secondhand book store's service quality improvement and strategy toward customer satisfaction including the existing used book stores.

Edentulous child with Allgrove syndrome: a rare case report

  • Vahedi, Mohammad;Fathi, Shima;Allahbakhshi, Hanif
    • Clinical and Experimental Pediatrics
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    • v.59 no.11
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    • pp.456-459
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    • 2016
  • Triple-A syndrome, also known as Allgrove syndrome, is a rare autosomal recessive disorder. The 3 features of this syndrome are achalasia, adrenal insufficiency, and alacrima. Achalasia could be the first manifestation of the triple-A syndrome; however, its etiology is unclear. Alacrima is generally asymptomatic but can be detected by obtaining patient history. Although adrenal insufficiency could have manifestations such as asthenia, it might be wrongly diagnosed as muscle fatigue. Vitamin D and calcium supplements are usually prescribed for the prevention of osteoporosis. Neurologic manifestations could be present in adults. In some individuals with this disorder, genetic examination indicates mutations in both alleles of the AAAS gene, which encodes a special 546-amino-acid protein designated ALADIN, and in chromosome 12q13. The genetic cause of the triple A syndrome in some patients who do not have an identified mutation is unknown. While very few such cases have been reported till date, one such case was presented to us as an edentulous child.

A Study on the Fundraising and Sponsorship for the Library (도서관의 후원기금에 관한 연구)

  • 노문자
    • Journal of the Korean BIBLIA Society for library and Information Science
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    • v.10 no.1
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    • pp.175-212
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    • 1999
  • All the libraries are facing major financial problems due to a variety of reasons such as non growing or even decreasing appropriations from their administration, continuing inflationary increases for journal and library materials, needs for new or improved facilities. increased costs for new technologies and networks and more demands for services. To address these financial problems, library administrators need to find ways to supplement their budgets through existing as well as new creative external funding strategies including grants, fundraising. sponsorship. resource sharing fees and others. This paper is drawing fundraising and sponsorship. But this financial aid is not an Aladin's lamp which, if rubbed three times, will give you three wishes and all the money you want. So this study is reviewed the history of fundraising, environmental situation in connecting with library law, status-quo, practical process for fundraising and existing sponsorship methods.

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A Study on the Enriched Contents of OPACs of Public Libraries in Korea (공공도서관 온라인 목록의 보강된 콘텐츠에 관한 연구)

  • Yoon, Cheong-Ok
    • Journal of Korean Library and Information Science Society
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    • v.50 no.4
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    • pp.181-201
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    • 2019
  • The purpose of this study is to analyze the present state of the enriched contents of OPACs of public libraries in Korea. Examined are the OPACs of 125 public libraries which hold Jeon Du-hwan Hoegorok, and 260 public libraries which hold Banil Jongjokjuui retrieved from KOLIS-NET of the National Library of Korea from Sept. through Oct. 2019. The enriched contents of these controversial books are mostly provided by Naver, Daum, and Aladin Internet Bookstore, and their so-called summaries, reviews, etc. are actually only excerpts supplied by publishers. They are given only as a link to external sources or the whole or partial display in a bibliographic record. Since these enriched contents contain only publishers' promotional statements, but not any objective and professional review, they are not much useful for library users. Therefore, more active participation of librarians in creating or evaluating the enriched contents are proposed, especially for such controversial books.

Sol-gel TiO2/Carbon Paste Electrode Nanocomposites for Electrochemical-assisted Sensing of Fipronil Pesticide

  • Maulidiyah, Maulidiyah;Azis, Thamrin;Lindayani, Lindayani;Wibowo, Dwiprayogo;Salim, La Ode Agus;Aladin, Andi;Nurdin, Muhammad
    • Journal of Electrochemical Science and Technology
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    • v.10 no.4
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    • pp.394-401
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    • 2019
  • The unique study of TiO2 sol-gel modified carbon paste electrode (CPE) nanocomposites have been developed for electrochemical sensor detecting fipronil pesticide compound. We develop the easy synthesized TiO2 via a sol-gel method and modified in CPE which applied electrochemical system as cyclic voltammetry (CV) because the concentration is proportional with current peaks. We discover the TiO2 optimal mass used of 0.1 g which is compared with 0.7 g carbon and 0.3 mL paraffin. It has high-current anodic (Ipa) of 1.13×103 μA and high-current cathodic (Ipc) -0.96×103 μA in scan rate of 0.5 V/s. The limit of detection (LOD) of fipronil has been determined of 34.0×10-5 μM in percent recovery of 0.8%. Its high-stability for lifetime TiO2-CPE nanocomposites was expressed for 13 days which mean that can be used for detecting fipronil pesticide.