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Climate Change Assessment on Air Temperature over Han River and Imjin River Watersheds in Korea

  • Jang, S.;Hwang, M.
    • International conference on construction engineering and project management
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    • 2015.10a
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    • pp.740-741
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    • 2015
  • the downscaled air temperature data over study region for the projected 2001 - 2099 period were then ensemble averaged, and the ensemble averages of 6 realizations were compared against the corresponding historical downscaled data for the 1961 - 2000 period in order to assess the impact of climate change on air temperature over study region by graphical, spatial and statistical methods. In order to evaluate the seasonal trends under future climate change conditions, the simulated annual, annual DJF (December-January-February), and annual JJA (June-July-August) mean air temperature for 5 watersheds during historical and future periods were evaluated. From the results, it is clear that there is a rising trend in the projected air temperature and future air temperature would be warmer by about 3 degrees Celsius toward the end of 21st century if the ensemble projections of air temperature become true. Spatial comparison of 30-year average annual mean air temperature between historical period (1970 - 1999) and ensemble average of 6-realization shows that air temperature is warmer toward end of 21st century compared to historical period.

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Analysis of Transcripts Expressed from the UL47 Gene of Human Cytomegalovirus

  • Hyun, Jong-Jun;Park, Hyo-Soon;Kim, Ki-Ho;Kim, Hung-Jin
    • Archives of Pharmacal Research
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    • v.22 no.6
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    • pp.542-548
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    • 1999
  • The UL47 gene (b 60390-b 60388) located in the unique long region of the human cytomegalovirus (HCMV) AD169 strain genome was analyzed RNA mapping. Northern blot analysis showed that the UL47 gene was expressed at late times after infection (72 h postinfection). The 9.7-kb transcript was expressed in the infected cells but not in phosphonoformate-treated cells at 72 hpi, indicating that the UL47 gene was only expressed at late times after infection. To map the 5'-end and 3'-end of UL47 transcripts, primer at late times after infection. To map the 5'-end and 3'-end of UL47 transcripts, primer extension and RNase protection analysis were performed. Primer extension analysis revealed that the transcription initiation site of UL47 was located in 27 bp downstream (b 60323) of the TATA box motif. The sizes of UL47 ORF (approximately 2.9-kb) and UL48 ORF (approximately 6.7-kb) deduced from computer sequence analysis suggest that the expressed 9.7-kb transcript of UL47 uses the 3'-end polyadenylation signal of Ul48. The result of RNase protection determined that the 3'-end of UL47 RNA utilized the 3'-end polyadenylation signal of UL48, which is located in HCMV genome b 70082.

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Secondary Structure for RNA Aptamers Binding to Guanine-Rich Sequence in the 5'-UTR RNA of N-Ras Oncogene

  • Cho, Bongrae
    • Journal of the Korean Chemical Society
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    • v.65 no.2
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    • pp.121-124
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    • 2021
  • RNA molecules which bind to the G-rich sequence in the 5'-UTR RNA which plays an important role in expression of N-ras, were selected. The secondary structures of five selected RNA aptamers including primer sequence were found by the CLC RNA workbench ver. 4.2 program (www.clcbio.com) and investigated with RNA structural probes such as RNase T1 which has specificity for a G in single-stranded region, RNase V1 specific for double strand and nuclease S1 specific for single strand. The generalized secondary structure model was proposed and characterized. It was composed of a central long double strand region flanked by single strand region at both end sides. The double strand region had an internal single-strand region and bulges. The single strand loop in the right side was composed of four or five nucleotides.

A Study of the Temperature Elevation Due to the Pre-flame Reaction in a Spark-Ignition Engine Using CARS Technique (CARS 측정 기술을 이용한 스파크 점화 기관에서의 화염 전 화학 반응에 의한 온도 변화에 관한 연구)

  • 최인용;전광민;박철웅;한재원
    • Transactions of the Korean Society of Automotive Engineers
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    • v.9 no.5
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    • pp.9-16
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    • 2001
  • End-gas temperatures were measured using CARS technique in a conventional DOHC spark- ignition engine fueled with PRF80. The measured pressure data were analyzed using band pass filter method. The measured CARS temperatures were compared with adiabatic core temperatures calculated from measured pressures. Significant heating by pre-flame reaction in the end gas zone was observed in the late part of compression stroke under both knocking and non-knocking conditions. CARS temperatures measured at 10 crank angle degree before knock occurrence was higher than adiabatic core temperatures. These results indicate that there exist some exothermic reactions in low pressure and temperature region. CARS temperatures began to be higher than the adiabatic core temperature when the end-gas temperatures reached look. The temperature elevation due to the pre-flame reaction correlated better with CARS temperature than with cylinder pressure.

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A Study of the Temperature Elevation Due to the Pre-flame Reaction Using CARS (CARS 를 이용한 스파크 점화 기관에서의 화염 전화학 반응에 의한 온도 변화에 관한 연구)

  • Choi, In-Yong;Chun, Kwang-Min;Park, Chul-Woung;Hahn, Jae-Won
    • 한국연소학회:학술대회논문집
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    • 2000.05a
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    • pp.85-92
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    • 2000
  • End-gas temperatures were measured using CARS technique in a conventional DOHC spark-ignition engine fueled with PRF80. The measured pressure data were analyzed using band pass filter method. The measured CARS temperatures were compared with adiabatic core temperatures calculated from measured pressure. Significant heating by pre-flame reaction in the end gas was observed in the late part of compression stroke under both knocking and non-knocking condition. CARS temperatures measured at 10 crank angle degree before knock occurrence was higher than adiabatic core temperatures. These results indicate that there exist some exothermic reactions in low pressure and temperature region. CARS temperatures began to be higher than the adiabatic core temperature when the end-gas temperatures reached 700 K. The temperature elevation due to the pre-flame reaction correlated better with CARS temperature than with cylinder pressure.

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The Improved Quasi-3D FE Analysis on the AFPM Motor (개선된 Quasi-3D FEM을 통한 AFPM 전동기의 해석)

  • Woo, Dong-Kyun
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.65 no.5
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    • pp.773-776
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    • 2016
  • In the quasi-3D finite element(FE) anlysis, the overall characteristics of axial flux permanent magnet(AFPM) motor could be composed of each computation region. However, A drawback of quasi-3D FEM is not to consider the end effect on the stack end. To address this problem, an improved quasi-3D FE analysis which considers the end effect of the AFPM motor was proposed. From results the 3D FE analysis, the validity of the proposed method is verified.

Fast Thinning Method for Fingerprint Image by Separating End and Bifurcation Regions (단점 및 분기 영역 분리를 이용한 지문영상의 고속 세선화 방법)

  • Lee, Jeong-Hwan;Kim, Jae-Chang
    • The Transactions of the Korea Information Processing Society
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    • v.6 no.10
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    • pp.2816-2822
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    • 1999
  • In this paper, a fast thinning method for fingerprint image by separating end and bifurcation region is proposed. To detect feature points in automatic fingerprint identification system, thinning of fingerprint is essential. The end and bifurcation regions in ridge line are separated by means of run-length coding, and parallel thinning method is applied to the separated regions. The rest parts except the end and bifurcation regions are processed by connecting center points of each run. The performance of the proposed method has been evaluated by CPU processing time and thinness measurement. By the experimental results, the proposed method is fast and has high thinness value.

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Competitive Efforts Regarding the South Pacific Islands by South Korea, Japan and China (동아시아 국가들의 태평양 쟁탈전 : 한국, 일본, 중국의 남태평양 도서국가 외교)

  • Park, Young-June
    • Ocean and Polar Research
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    • v.35 no.4
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    • pp.373-381
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    • 2013
  • The Pacific Island Forum that consists of 14 island countries in the South Pacific has long been the focus of keen attention from East Asian countries such as South Korea, Japan and China. The South Pacific area was controlled by Japan right after the First World War. The League of Nations bestowed the right of trusteeship over the region to Japan, one of the victors in the war. However, the U.S. considered the area indispensible for its security interests in the Pacific after victory in the Second World War. With the end of Cold War period, the region again began to gain the competitive attention of Japan, China and Korea. Japan has made efforts to give economic assistance to this region by holding the Japan-Pacific Islands summit every three years. In addition, Japan is promoting a security engagement with this region by dispatching Self Defense Forces with the aim of initiating construction and development projects. In response to Japan's active involvement in the region, China also began to convene a summit meeting with these countries in 2006, making pledges of economic assistance. Furthermore, Chinese civilian companies struck deals of investment with municipal institutions in the region with a view to enhancing China's influence in the region. Japan's and China's active engagement in the region has galvanized South Korea to craft a more effective strategic approach to the region.

A Study on the Front Windows Frame of Maeng's House (맹씨행단 대청 전면창호에 관한 연구)

  • 곽동엽
    • Journal of the Korean housing association
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    • v.6 no.2
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    • pp.171-180
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    • 1995
  • This paper tries to define the characteristics of windows frame built in the end of Koryu dynasty to the early period of Chosun dynasty. The windows frame is found both in temples and in Maeng's house. It is thus proved that the frame was a general one prevailed in that time without regard to function and region. And it proves to be the original form of windows frame of temples and houses in the middle or the end of Chosun dynasty.

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Backlight Compensation by Using a Novel Region of Interest Extraction Method (새로운 관심영역 추출 방법을 이용한 역광보정)

  • Seong, Joon Mo;Lee, Seong Shin;Lee, Songwook
    • KIPS Transactions on Software and Data Engineering
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    • v.6 no.6
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    • pp.321-328
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    • 2017
  • We have implemented a technique to correct the brightness, saturation, and contrast of an image according to the degree of light, and further compensate the backlight. Backlight compensation can be done automatically or manually. For manual backlight compensation, we have to select the region of interest (ROI). ROI can be selected by connecting the outline of the desired object. We make users select the region delicately with the new magnetic lasso tool. The previous lasso tool has a disadvantage that the start point and the end point must be connected. However, the proposed lasso tool has the advantage of selecting the region of interest without connecting the start point and the end point. We can automatically obtain various results of backlight compensation by adjusting the number of k-means clusters for texture extraction and the threshold value for binarization.