• 제목/요약/키워드: Nam Byung Gil

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조선(朝鮮) 산학(算學)과 사원옥감(四元玉鑑) (Mathematics in Chosun Dynasty and Si yuan yu jian)

  • 홍성사;홍영희
    • 한국수학사학회지
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    • 제20권1호
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    • pp.1-16
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    • 2007
  • 송(宋), 원대(元代)의 가장 중요한 산학자(算學者) 소구배(泰九韶), 이치(李治), 주세걸(朱世傑)이 19세기 조선(朝鮮)에서 연구되어 19세기 중엽 조선(朝鮮) 산학(算學), 특히 대수학 분야가 크게 발전하였다. 이 논문에서는 사원옥감(四元玉鑑)이 조선(朝鮮) 산학(算學)에 미친 영향을 조사한다. 나사림(羅士琳)의 사원옥감세초(四元玉鑑細艸)를 연구한 남병길(南秉吉)의 옥감세초상해(玉監細艸詳解), 이상혁(李尙爀)의 저서로 추정되는 사원옥감(四元玉鑑)과 이에 기초하여 저술된 남병길(南秉吉)의 산학정의(算學正義), 이상혁(李尙爀)의 익산(翼算)을 조사하여 사원옥감(四元玉鑑)과 조선(朝鮮) 산학(算學) 발전의 관계를 연구한다.

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조선 산학자 이상혁의 방정식론

  • 홍성사;홍영희
    • 한국수학사학회지
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    • 제17권1호
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    • pp.1-14
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    • 2004
  • Iksan(翼算) written by Lee Sang Hyuk(李相赫, 1810∼\ulcorner) is unique among mathematical books published in Chosun Dynasty since it is the only book which accomplishes the conceptualization of theory of equations if not that of mathematics itself. We investigate its process by his other publications and mathematical interaction with Nam Byung Gil(南秉吉, 1820∼1869).

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A Blunt Traumatic Vertebral Artery Injury: A Case Report

  • Lee, Min A;Choi, Kang Kook;Lee, Gil Jae;Yu, Byung Chul;Ma, Dae Sung;Jeon, Yang Bin;Chung, Min;Lee, Jung Nam
    • Journal of Trauma and Injury
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    • 제29권1호
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    • pp.28-32
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    • 2016
  • Blunt traumatic vertebral artery injury (TVAI) is relatively rare, but it may frequently be associated with head and neck trauma. TVAI is difficult to diagnose with diverse outcomes, thus it is a clinical challenge. There are no widely accepted guidelines for treatment and diagnosis, so that the diagnosis of TVAI can be easily delayed. Therefore, any clinical suspicion from clues on the initial imaging is important for diagnosis of TVAI. The authors report on the case of a patient diagnosed as having a TVAI with a transverse foramen fracture.

번적과 익적의 역사 (History of Fan Ji and Yi Ji)

  • 홍성사;홍영희;장혜원
    • 한국수학사학회지
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    • 제18권3호
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    • pp.39-54
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    • 2005
  • 중국 산학에서는 구장산술의 제곱근과 세제곱근의 해법을 일반화하여 고헌이 도입한 증승개방법을 통하여 다항방정식의 해의 근사값을 구한다. 이 때 도구로 사용되는 조립제법에서 음수와 그 연산을 정확히 사용하지 않아서 번적, 익적이라는 개념이 나타나는데, 이는 조선 산학에도 그대로 사용되었다. 먼저 중국과 조선에서 번적, 익확에 대한 역사를 조사하고, 19세기 중엽에 조선 산학자 남병길과 이상혁이 번적과 익적에 대한 충분조건을 얻어내고 이를 증명한 사실을 밝혀낸다.

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Treatment Option for High Grade Spleen Injury and Predictive Factors for Non-operative Management

  • Na, Joung Won;Lee, Jung Nam;Yu, Byung Chul;Lee, Min A;Park, Jae Jung;Lee, Gil Jae
    • Journal of Trauma and Injury
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    • 제30권3호
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    • pp.91-97
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    • 2017
  • Purpose: Purpose: The prognostic factors of non-operative management (NOM) in high-grade spleen injuries have been extensively studied, but factors that would help treatment decisions are lacking. We compared the characteristics of the patients to identify the factors affecting treatment choices. Methods: This is a review of 207 blunt spleen injury patients from January 2004 to December 2013. We compared clinical features and mortality between surgery and NOM, and used multivariate regression analysis to find the factor most strongly associated with prognosis. Results: Of the 207 patients, 107 had high-grade spleen injury patents (grade III or above). Of these, 42 patients underwent surgery and 65 patients underwent NOM. The mortality was 7% following surgery, 3% with NOM. The amount of packed red blood cells transfused in the first 24 hours and spleen injury grade were associated with management type, and mortality was highly associated with activated partial thromboplastin time (aPTT) and spleen injury grade. Conclusions: The grade of spleen injury was associated with management and mortality, so correctly assessing the spleen injury grade is important.

해경세초해 개관 (Introduction to the Concepts of the Problems in the Sea Mirror)

  • 유인영;고승준
    • 한국수학사학회지
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    • 제18권1호
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    • pp.1-10
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    • 2005
  • 하늘을 원으로 제한하거나 한정하는 것은 원시대의 리치에 의해서 리유와 함께 새로운 네 가지의 법칙으로는 풀지 못하였다. 조선 시대의 남병철은 해경에서의 원측정 문제와 그의 동생인 남병길에 의해서 서문에 쓰여졌다. 이 논문에서는 해경에서의 문제의 개념과 그것의 세 가지 문제를 소개할 것이다.

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둔상성 중증 외상환자에서 내원 초기에 시행한 동맥혈 염기결핍과 예후의 관계 (The Usefulness of the Admission Base Deficit as a Marker of Mortality in Severely Injured Patients with Blunt Trauma)

  • 유병철;정민;이길재;이정남
    • Journal of Trauma and Injury
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    • 제26권1호
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    • pp.1-5
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    • 2013
  • Purpose: The base deficit (BD) at admission in severely injured patients has been shown to predict the adequacy of resuscitation and outcome, but this relationship is not well established in the Korean experience. The purpose of this study was to define the association between arterial blood gas (ABG) values and the mortality for patients with severe blunt trauma at a developing trauma center in Korea. Methods: A retrospective review of 415 adult patients with severe blunt trauma was conducted using electronic medical records from Jan. 2010 to Dec. 2011. Results: A total of 256 patients had ABG drawn within 1 hour of arrival. Patients who expired displayed a higher lactate level (4.86 vs. 3.31, p<0.0001), a worse BD (-7.99 vs. -5.37, p=0.001), and a lower pH (7.31 vs. 7.34, p=0.011) at arrival compared with those who survived. A statistically significant association was also observed between BD and blood product usage (p=0.001). Conclusion: The base deficit at admission is a useful marker of mortality and outcome in severely injured patients with blunt trauma in Korea.