• 제목/요약/키워드: Collage

검색결과 1,634건 처리시간 0.141초

Prediction of Dispersal Directions and Ranges of Volcanic Ashes from the Possible Eruption of Mt. Baekdu

  • Lee, Seung-Yeon;Suh, Gil-Yong;Park, Soo-Yeon;Kim, Yeon-Su;Nam, Jong-Hyun;Yu, Seung-Hyun;Park, Ji-Hoon;Kim, Sang-Jik;Kim, Yong-Sun;Park, Sun-Yong;Yun, Ja-Young;Jang, Yu-Jin;Min, Se-Won;Noh, So-Jung;Kim, Sung-Chul;Lee, Kyo-Suk;Chung, Doug-Young
    • 한국토양비료학회지
    • /
    • 제51권1호
    • /
    • pp.16-27
    • /
    • 2018
  • To predict the influence of volcano eruption on agriculture in South Korea we evaluated the dispersal ranges of the volcanic ashes toward the South Korea based on the possibilities of volcano eruption in Mt. Baekdu. The possibilities of volcano eruption in Mt. Baekdu have been still being intensified by the signals including magmatic unrest of the volcano and the frequency of volcanic earthquakes swarm, the horizontal displacement and vertical uplift around the Mt. Baekdu, the temperature rises of hot springs, high ratios of $N_2/O_2$ and $_3He/_4He$ in volcanic gases. The dispersal direction and ranges and the predicted amount of volcanic ash can be significantly influenced by Volcanic Explosivity Index (VEI) and the trend of seasonal wind. The prediction of volcanic ash dispersion by the model showed that the ash cloud extended to Ulleung Island and Japan within 9 hours and 24 hours by the northwestern monsoon wind in winter while the ash cloud extended to northern side by the south-east monsoon wind during June and September. However, the ash cloud may extent to Seoul and southwest coast within 9 hours and 15 hours by northern wind in winter, leading to severe ash deposits over the whole area of South Korea, although the thickness of the ash deposits generally decreases exponentially with increasing distance from a volcano. In case of VEI 7, the ash deposits of Daejeon and Gangneung are $1.31{\times}10^4g\;m^{-2}$ and $1.80{\times}10^5g\;m^{-2}$, respectively. In addition, ash particles may compact close together after they fall to the ground, resulting in increase of the bulk density that can alter the soil physical and chemical properties detrimental to agricultural practices and crop growth.

개에서의 항문주위선 샘암종 (Perianal Adenocarcinoma in Dog)

  • 양해걸;도선희;위엔동웨이;홍일화;기미란;박진규;구문정;이혜림;황옥경;한정연;홍경숙;박호용;유성은;정규식
    • 생명과학회지
    • /
    • 제18권2호
    • /
    • pp.279-283
    • /
    • 2008
  • 12.6살 된 수컷 Shitzu의 항문주위에 형성된 결절 조직의 생검을 실시하였다. 육안적 소견상 결절은 갈색과 검은색을 나타냈으며 절단면은 흰색의 균질한 물질로 가득 차 있었으며 일부에서는 괴사소견을 관찰 할 수 있었다. 광학적 현미경 상에서 종양세포들은 농축된 핵을 가지고 있으며 일부에서는 원시 종양세포들이 인접 조직을 침습하고 있는 것을 관찰할 수 있었다. 또한 면역조직 화학적 염색상에서 농축된 종양세포, 주변조직에 침습한 종양세포와 기저세포는 EGFR, HER-2/neu, MMP-9, PKC ${\alpha}$ 등에 양성반응이 나타난 것을 관찰되었다. 일반적으로 개에서의 양성 항문주위선종은 다른 종양보다 4.5배 이상 발생된다는 보고(특히 수캐)가 있으나 조직병리학적 소견과 면역화학적 염색소견상 전형적인 항문주위선 샘암종은 보기 드물게 나타나므로 향후의 종양진단과 종양연구에 도움이 될 것으로 사료된다.

경항통과 척추 시상균형 및 만곡의 상관관계에 대한 임상적 연구 (Clinical Study on Cervical Pain with Focus on Sagittal Spinal Balance and Spinal Curvature)

  • 이원일;고필성;조병진;권신애;이정우;송지연;서병관;우현수;백용현;박동석;남상수
    • Journal of Acupuncture Research
    • /
    • 제27권2호
    • /
    • pp.97-104
    • /
    • 2010
  • Objectives : The authors aimed to determine the presence of relationships between cervical pain and cervical curvature, lumbar curvature, sacral slope and sagittal spinal balance. Methods : Medical records of outpatients who made their first visits to the Department of Acupuncture and Moxibustion in the Spine center at Kyung Hee East-West Neo Medical Center between September 1, 2008 and October 31, 2009 were evaluated. A total of 50 patients visiting within the time period had visited with a chief complaint of cervical pain, and had lateral entire spine X-rays taken. After excluding patients with previous spine operations, 46 patients were selected for the final analysis. The cervical lordotic angle(CLA), lumbar lordotic angle(LLA), Ferguson's angle(FA), and sagittal vertical axis(SVA) were measured on the lateral entire spine X-ray cuts, and the relationships between these values and patient gender, age, chief complaint, and duration of symptoms were assessed. Results : No significant difference was found in relationships between gender and measured values. SVA showed statistically significant correlation between age, but CLA, LLA, and FA was not. There was a significant difference in SVA between patients with only cervical pain and those with both cervical pain and low back pain. Patients with a duration of symptoms longer than 6 months showed a statistically significant difference in SVA with those who had shorter symptoms. Correlation analysis between measured values was statistically significant only between LLA and FA. Conclusions : Evaluation and treatment of sagittal imbalance should be considered in patients presenting with cervical pain if symptoms have persisted for over 6 months or have accompanying low back pain.