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High Purification of Hg2Br2 Powder for Acousto-Optic Tunable Filters Utilizing a PVT Process (PVT공정을 이용한 음향광학 가변 필터용 Hg2Br2 파우더의 고순도 정제)

  • Kim, Tae Hyeon;Lee, Hee Tae;Kwon, In Hoi;Kang, Young-Min;Woo, Shi-Gwan;Jang, Gun-Eik;Cho, Byungjin
    • Korean Journal of Materials Research
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    • v.28 no.12
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    • pp.732-737
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    • 2018
  • We develop a purification process of $Hg_2Br_2$ raw powders using a physical vapor transport(PVT) process, which is essential for the fabrication of a high performance acousto-optic tunable filter(AOTF) module. Specifically, we characterize and compare three $Hg_2Br_2$ powders: $Hg_2Br_2$ raw powder, $Hg_2Br_2$ powder purified under pumping conditions, and $Hg_2Br_2$ powder purified under vacuum sealing. Before and after purification, we characterize the powder samples through X-ray diffraction and X-ray photoelectron spectroscopy. The corresponding results indicate that physical properties of the $Hg_2Br_2$ compound are not damaged even after the purification process. The impurities and concentration in the purified $Hg_2Br_2$ powder are evaluated by inductively coupled plasma-mass spectroscopy. Notably, compared to the sample purified under pumping conditions, the purification process under vacuum sealing results in a higher purity $Hg_2Br_2$ (99.999 %). In addition, when the second vacuum sealing purification process is performed, the remaining impurities are almost removed, giving rise to $Hg_2Br_2$ with ultra-high purity. This high purification process might be possible due to independent control of impurities and $Hg_2Br_2$ materials under the optimized vacuum sealing. Preparation of such a highly purified $Hg_2Br_2$ materials will pave a promising way toward a high-quality $Hg_2Br_2$ single crystal and then high performance AOTF modules.

A Study on the Environment-friendly Planning Elements on High-Class Houses Kuangajeong in Chosun Dynasty (관가정(觀稼亭)으로 본 조선시대 상류주택의 환경친화적 계획요소 분석)

  • Heo, Jun;Lee, Shi Young;Song, Byeong Hwa
    • Korean Journal of Heritage: History & Science
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    • v.44 no.3
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    • pp.164-177
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    • 2011
  • This study aims to examine the traditional living space to reflect the environment-friendly design methods and principles of reestablishment. To do so, this study carried on a related literature study and field survey. The traditional living space in terms of the environmental friendliness is reflected on site selection and space composition, and utilization of natural energy and natural materials. Focused on the Kwangajeong in Yangdong Village, this study is to identify eco-friendly techniques on the traditional living space. As a result, it shows that Kwangajeong with the side of the southeast in site selection had been considered in aspect of environmental control such as sunshine and solar radiation. Also building construction techniques had been used to minimize the variation of terrain. In aspect of environmental conservation, Kwangajeong had structurally arranged the gate, an inner yard and an inner floor to allow good ventilation. In aspect of space composition, Kwangajeong with the emphasis of scenic view had utilized the methods that attract external landscape through the control of its fences. Environment-friendly techniques and control principles in traditional space had been developed by a long experience through the long periods and the traditional techniques suitable for local climate and local environment have been developed. The technical development of these techniques to resolve the global environmental and energy issues and create a more pleasant living environment of human beings might be critical.

Application Methods of Traditional Culture in Modern Landscape Design of Korea and China -Focused on Seoul and Beijing Olympic Park- (한국과 중국의 현대조경설계에서 전통문화의 적용방법 - 서울·북경 올림픽 공원을 중심으로 -)

  • Liu, Bing;Shim, Joon-Young;Wang, Qiao;Lee, Shi-Young
    • Korean Journal of Heritage: History & Science
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    • v.45 no.3
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    • pp.224-237
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    • 2012
  • Based on the Olympic Park in Seoul and Beijing, respectively, a analys is of the two successful examples of the designers in a traditional way to design a unique culture of a traditional folk culture. Rooted in traditional culture to create their own characteristics, and by studying abroad, a good way to design a unique work not to pursue the international trend has been displayed now. Based on the above two parks of the application of the traditional culture of analysis and studying the literature, I summarized the traditional culture in modern landscape application methods as follows:Firstly, understand the traditional culture. Secondly, the method can be divided into four steps, namely, to preserve, to reproduce, to imitate, and to learn from. 1. A reservation is divided into functional retention and conversion of the prototype. 2. Reproduction is also divided into two types, first is the site of reproduction and the reproduction of literature or legend. 3. Simulation includes three types, the original use, changed use and re-creation. Imitation. 4. Reference. In a garden design, the other art forms or cultural phenomena reference are always allowed and encouraged.

Development of Site Evaluation Criteria for Woodland Burial Grounds (수목장림 입지 평가기준 설정 연구)

  • Moon, Chang Soon;Lee, ShiYoung
    • Journal of the Korean Institute of Landscape Architecture
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    • v.47 no.3
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    • pp.22-30
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    • 2019
  • The demand for National Woodland Burial Grounds is expected to increase as interest in natural burial, including woodland burial, is increasing. This study was performed to provide evaluation criteria applying weighting factors to the evaluation for location selection. Through literature review, location selection evaluation factors for forest facilities, similar to forest welfare facilities, were reviewed and analyzed. As a result of the analysis, 74 preliminary evaluation criteria were selected. Based on the results, three expert groups (public servants in central and local governments and other public agencies in charge of forest welfare facility, related field researchers, and civil experts) reviewed the preliminary evaluation factors. Evaluation factors were classified into two categories, 6 sub-categories, and 22 segments. The selected evaluation factors were layered for the second preference survey. They were classified into Forest Environment and Human Environment, and those categories were further classified into three categories. Then they were further classified into segments. After segmentation, the experts who participated in the first survey checked the differences in the significance of the layered factors by utilizing AHP. The site evaluation criteria table was prepared using the evaluation criteria and the significance of each layer. In order to apply it to the candidate sites, 10 sites including the existing National Woodland Burial Grounds and 9 candidate sites considered in the previous studies were compared and analyzed including Ulju County Ulsan City, Suncheon City Jeollanam-do and Janggun-myeon Sejeong City.

A Collecting and Record of Wide Area Cultural Resources : the Case of Asian Cotton Cultural Resources (광역 문화자원의 수집과 기록 : 아시아 목화문화자원을 중심으로)

  • Noh, Shi-Hun
    • The Korean Journal of Archival Studies
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    • no.28
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    • pp.123-153
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    • 2011
  • In Asia, when cotton and cotton fabrics cultivated and produced in India of Southern Asia had spread to the whole Asia area by land and by sea, the Cotton Road and cotton fabric cultural area could be formed. In Korea, the traditional cotton (Gossypium arboreum) brought by Moon Ik-Jeom in 1363 was cultivated and then the Upland cotton (Gossypium hirsutum) brought via Japan could be produced from 1904. Especially, Gwangju/Jeonnam was the most active place in producing traditional cotton, and eventually became the center of cotton cultivation and fabric production after bringing in Upland cotton. In order to collect and record the cotton cultural resources in the broad area, the Cultural Resources Set, classified its component parts should be made first and then the collecting objects should be investigated. The collecting areas are selected based on the spreading paths and the regional significance of cotton. Since its difficulty of collecting the relevant resources from all of the places in Asia, it should be planned to share the resources through exchanges and cooperation among private, institution and organization. The relevant experts from the various fields should participate in the interdisciplinary researches which are necessary for collecting and recording of wide area cultural resources. Considering the collecting limitation of genuine relics, the digital archives should be established and then offered through a web site that everyone can use them freely by remote. It also needs to plan to display on and off-line for users to perceive the similarity, difference and interconnections of the resources with ease.

Immunomodulatory Properties of Lactobacillus plantarum NC8 Expressing an Anti-CD11c Single-Chain Fv Fragment

  • Liu, Jing;Yang, Guilian;Gao, Xing;Zhang, Zan;Liu, Yang;Yang, Xin;Shi, Chunwei;Liu, Qiong;Jiang, Yanlong;Wang, Chunfeng
    • Journal of Microbiology and Biotechnology
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    • v.29 no.1
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    • pp.160-170
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    • 2019
  • The lactic acid bacteria species Lactobacillus plantarum (L. plantarum) has been used extensively for vaccine delivery. Considering to the critical role of dendritic cells in stimulating host immune response, in this study, we constructed a novel CD11c-targeting L. plantarum strain with surface-displayed variable fragments of anti-CD11c, single-chain antibody (scFv-CD11c). The newly designed L. plantarum strain, named 409-aCD11c, could adhere and invade more efficiently to bone marrow-derived DCs (BMDCs) in vitro due to the specific interaction between scFv-CD11c and CD11c located on the surface of BMDCs. After incubation with BMDCs, the 409-aCD11c strain harboring a eukaryotic vector pValac-GFP could lead to more efficient expression of GFP compared with wild-type strains shown by flow cytometry analysis, indicating the enhanced translocation of pValac-GFP from L. plantarum to BMDCs. Similar results were also observed in an in vivo study, which showed that oral administration resulted in efficient expression of GFP in both Peyer's patches (PP) and mesenteric lymph nodes (MLNs) within 7 days after the last administration. In addition, the CD11c-targeting strain significantly promoted the differentiation and maturation of DCs, the differentiation of $IL-4^+$ and $IL-17A^+$ T helper (Th) cells in MLNs, as well as production of $B220^+$ $IgA^+$ B cells in the PP. In conclusion, this study developed a novel DC-targeting L. plantarum strain which could increase the ability to deliver eukaryotic expression plasmid to host cells, indicating a promising approach for vaccine study.

A Case Study on Real-time Live Video Streaming Content (실시간 방송 영상 콘텐츠 사례 연구)

  • SHI, YU;Chung, Jean-Hun
    • Journal of Digital Convergence
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    • v.19 no.4
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    • pp.251-257
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    • 2021
  • With the development of new media, great changes are taking place in the way people get information. The change is the use of video content that can deliver content in a more three-dimensional way than words or photos. After 2016, the number of live video streaming content providers and users has increased. In this paper the write takes the 1 personal live video streaming content as the research object. And the write takes live video streaming content on YouTube live or Douyu TV as a research example. In this paper, the writer analyzes the digital information content in the live video streaming case. And the writer expounds the necessity of these visual information and the characteristics of real-time live video streaming content. Especially since 2020, because of the influence of the COVID-19, the live video streaming industry has begun to combine with the traditional industry. It is expected that the integration of digital cutting-edge technology and live video streaming will not only provide diversity in the content, but also create more social value for the video content consumption culture. Therefore, The writer thinks it is necessary to conduct in-depth research on the social responsibility of real-time live content in the future.

Genomic analysis of Sheldrake origin goose hemorrhagic polyomavirus, China

  • Wan, Chunhe;Chen, Cuiteng;Cheng, Longfei;Liu, Rongchang;Fu, Guanghua;Shi, Shaohua;Chen, Hongmei;Fu, Qiuling;Huang, Yu
    • Journal of Veterinary Science
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    • v.19 no.6
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    • pp.782-787
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    • 2018
  • Goose hemorrhagic polyomavirus (GHPV) is not a naturally occurring infection in geese in China; however, GHPV infection has been identified in Pekin ducks, a domestic duck species. Herein, we investigated the prevalence of GHPV in five domestic duck species (Liancheng white ducks, Putian black ducks, Shan Sheldrake, Shaoxing duck, and Jinyun Sheldrake) in China. We determined that the Jinyun Sheldrake duck species could be infected by GHPV with no clinical signs, whereas no infection was identified in the other four duck species. We sequenced the complete genome of the Jinyun Sheldrake origin GHPV. Genomic data comparison suggested that GHPVs share a conserved genomic structure, regardless of the host (duck or geese) or region (Asia or Europe). Jinyun Sheldrake origin GHPV genomic characterization and epidemiological studies will increase our understanding of potential heterologous reservoirs of GHPV.

Yulgok's Li-Qi-Zhi-Miao and Zhi-Zhonghe - on the basis of Qi-Zhi change and It's Educational Implication (율곡의 이기지묘(理氣之妙)와 치중화(致中和) - 기질변화의 도덕교육적 함의를 중심으로 ­-)

  • Shin, Soon-Jeong
    • The Journal of Korean Philosophical History
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    • no.50
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    • pp.9-36
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    • 2016
  • This thesis aims to suggest probability of modern confrontation of Yulgok YiYi's thought. For this, find out the meaning of Li-Qi-Zhi-Miao(理氣之妙) and through the Qi-Fa-Li-Cheng-Yi-Tu(氣發理乘一途), and Li-Tong-Qi-Ju-Shou(理通 氣局說), Yin-Xim-Do-Xim-Shou(人心道心說), he creatively reveal the relation of Xin(心) Xing(性) Qing(情) Yi(意) continually. On one side he suggested the way of ideal man, on the other side he was showed adaptablity to the real world. So I think Yulgok had placed emphasis on the Zhongyong(中庸) and Yijing(周易), so he point out the meaning of ShiZhong (時中). Then he had high ideals practical Zhi-Zhonghe((致中和). So This paper is to find out his foundation of epistemology, and then to know It's modern meaning of methodology of moral Education's Implication on the relation of Xin(心) Xing(性) Qing(情) Yi(意). So We ca find out Ji(機) is very important the transition of Qi-Zhe(氣質).

Reading Korean and Chinese Paintings Expressing the Ideas of Classical Literary Works - Focused on Interpretation of The Text (한국과 중국의 시의화(詩意畵) 읽기 - 텍스트의 해석을 중심으로 -)

  • Kang, KyungHee
    • (The)Study of the Eastern Classic
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    • no.50
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    • pp.261-294
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    • 2013
  • The purpose of this paper lies how the original text of Chinese classical literary works have been implemented in the paintings of China and Korea, and inspect the ways how of these original text interpreted in paintings. It is an experiment of trying to analyze through literature with painting and read again painting through literature. Qu Yuan(屈原) Prose Poem of Fisherman("漁父辭"), Tao Yuanming(陶淵明) Prose Poem of Returning Home("歸去來辭") and the prose with a poem on the peach blossom spring("桃花源記幷詩"), Du Fu(杜甫), Song of Eight Drunken Celestials("飮中八仙歌"), Su Shi(蘇軾), Odes on the Red Cliff("赤壁賦"), Ou Yangxiu(歐陽脩), Odes of the Sounds of Autumn("秋聲賦") and the paintings which based on these texts were the target of examination. These literary texts shared by Chinese and Korea have been compared in the aspects of acceptance and enjoyment. And on the basis of this process the characteristics of korean paintings expressing the ideas of classical literary works was induced. As a result, the following facts are derived. First, By the emergence of the typical style which was formed historically in China at the korean painting shows that korean painters not only actively embraced the art style of China also did not lose the international sense. Second, through the profound study for chinese painting, they transformed it in accordance with korean aesthetic view and finally revealed typical korean characteristics. Third, the results as described above showed the difference of perception and interpretation of literary works between China and Korea.