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소수의 특성을 활용한 도시성장 비쥬얼 콘텐츠 모델 연구
정승필(Seungpil Jeong) 한국디지털콘텐츠학회 2020 한국디지털콘텐츠학회논문지 Vol.21 No.7
The rapid urbanization and the eruption of large cities has made study on the internal structure of cities actively. The classic urban structural model, introduced by Burgess, Hoyt, etc., effectively provided interpretation of the urban spatial structure. However, as the times change, the urban structural model requires constant change. This paper introduces new visual content to help understand the urban structure of the modern city. It is an visual structural model explaining urban growth based on the theoretical characteristics of prime numbers. This model confirms the meaning by classic models of Burgess and Hoyt, and the prime-based urban growth model is verified with the urbanized areas of Seoul. Although this study focused on visual aspects for interpreting urban models, it is expected that the characteristic of prime numbers in the future can explain urban growth in various structures.
정보화 시대 한국의 기능적 소득분배와 Goodwin 성장순환모형: 1981~2016
정승필(Seungpil Jeong),권오범(Oh-Bum Kwon) 한국전자거래학회 2020 한국전자거래학회지 Vol.25 No.3
21세기 들어 정보화는 국민 제반의 삶에 지대하게 작용하고 있다. 실제 정보화로 인해 일어나는 사회구조와 생활양식의 엄청난 변화를 몸소 체험하고 있다. 본 논문은 정보화로 인한 사회구조에 대한 논의보다 경제현상에 대해 관심을 둔다. 경제성장, 경기순환, 소득분배를 종합적으로 표현 가능한 Goodwin 모형이 정보화시대 한국경제에 적합한지를 확인한다. 한국경제의 시계열자료로부터 계수를 추정하는 계량경제방법론을 택하여 모형을 시뮬레이션 한다. 시뮬레이션 결과 Goodwin 모형이 한국의 기능적 소득분배를 분석하는데 적절함을 확인하였다. In the 21st century, informatization is playing a huge role in people’s lives. Korea is experiencing the tremendous changes in social structure and lifestyle caused by informatization. This paper focuses on economic phenomena rather than discussion on social structure due to informatization. We check whether the Goodwin model, which can comprehensively express economic growth, economic cycle, and income distribution, is suitable for the Korean economy in the information age. This model is simulated by selecting a quantitative economic methodology that estimates coefficients from time series data of the Korean economy. The simulation results confirmed that the Goodwin model is suitable for analyzing functional income distribution in Korea.
원발성 알도스테론증으로 부신 절제술 받은 환자의 수술 후 결과에 대한 분석
류재민,정승필,이정희,김지영,최민영,이세경,길원호,최준호,이정언,김지수,남석진,양정현<SUP>1<.SUP>,김정한,Jai-Min Ryu,M.D.,Seung-Pil Jung,M.D.,Jeong-Hee Lee,M.D.,Ji-Yeong Kim,M.D.,Min-Yeong Choi,M.D.,Se-Kyung Lee,M.D.,Won-Ho Kil,M.D.,Jun-Ho C 대한갑상선-내분비외과학회 2011 The Koreran journal of Endocrine Surgery Vol.11 No.4
Purpose: Primary aldosteronism (PA) is characterized by hypertension (HTN), hypokalemia, suppressed plasma renin activity, and inappropriate aldosterone secretion. The purpose of this study was to analyze postoperative results on blood pressure (BP), and to determine the factors associated with resolution of HTN after adrenalectomy for PA. Methods: One hundred eight patients (66 females and 42 males) with a mean age of 46 years underwent adrenalectomy for PA between January 1, 1996 and September 30, 2009. Their clinical characteristics and biochemical parameters were reviewed retrospectively. Results: All patients had HTN preoperatively and 20 patients (18.1%) had uncontrolled HTN. Hypokalemia was evident in 89.1% of patients, cardiovascular events in 4.5% and cerebrovascular events in 8.2%. There was a significant decrease in both systolic BP and diastolic BP postoperatively, as compared with that before operation. Median systolic BP decreased from 150 mmHg to 125 mmHg at the last follow-up (P<0.01), and median diastolic BP decreased from 93.5 mmHg to 81.5 mmHg (P<0.01). Sixty two (57.4%) patients were cured of HTN and did not require any hypertensive agent, and 38 (35.1%) patients had an improvement in BP control, whereas 9 (8.3%) patients had no change in BP. Univariate analysis showed that duration of HTN and more than two HTN treatment agents were independent factors predicting sustained hypertension after surgery. Conclusion: The duration of HTN and the severity of HTN are factors influencing persistence of HTN after operation for a PA. (Korean J Endocrine Surg 2011;11:276-282)
정평안 ( Pyung An Jung ),정승필 ( Seung Pil Jung ),이정희 ( Jung Hee Lee ),김지영 ( Ji Yeong Kim ),최민영 ( Min Yeong Choi ),이세경 ( Se Kyung Lee ),최준호 ( Jun Ho Choe ),이정언 ( Jeong Eon Lee ),김지수 ( Jee Soo Kim ),남석진 ( S 대한임상종양학회 2011 Korean Journal of Clinical Oncology Vol.7 No.2
목적: 최근 국내에서 발병이 증가하고 있는 피부암 환자에서 시행한 서혜부 림프절 곽청술의 술기를 소개하고 수술에 따른 합병증 및 수술 결과에 대해 고찰하고자 하였다. 방법: 2002년 3월부터 2010년 7월까지 피부암의 서혜부 림프절전이로 서혜부 림프절 곽청술을 시행한 43예의 환자를 대상으로 수술 후 합병증, 생존률, 재발 유무 등을 후향적으로 분석하였다. 결과: 서혜부 림프절 곽청술을 시행한 43명의 환자 중 편평 세포암 8명, 악성 흑색종 35명이었다. 평균 12.6개의 림프절을 절제하였고 평균 2.46개의 림프절에서 전이가 확인 되었다. 수술 후 35예(81.4%)의 환자에서 하지 림프 부종, 피부 괴사, 장액종의 합병증이 발생하였으나 모두 보존적 치료 후 호전되었다. 평균 24.5(3-83)개월의 외래 추적 관찰 기간 동안 20명(46.5%)의 환자에서 재발이 발생하였고 8명(18.6%)의 환자가 사망하였다. 결론: 림프절로 전이된 피부암은 불량한 예후를 보이고 서혜부림프절 곽청술은 많은 합병증을 동반하는 술식이지만 경험 있는 외과의에 의해 적절히 시행된다면 심각한 합병증과 재발을 줄일 수 있다. 국내에서 피부암은 드물 질환이지만 서혜부 림프절 곽청술의 술기 및 술후 경과에 대해 잘 파악하고 있는 것이 이 질환의 치료를 위해 중요하다. Purpose: To evaluate the results and experience of inguinal lymph node dissection in patients with skin cancer. Methods: 43 patients were underwent inguinal lymph node dissection for skin cancer spread to the lymph nodes in SMC between Mar 2002 and Jul 2010. We investigated postoperative complications, recurrence rate, survival rate from their medical records, retrospectively. Results: Among 43 patients, 35 cases were diagnosed as malignant melanoma and 8 were diagnosed as squamous cell carcinoma. 12.6 lymph nodes were retrieved, and 2.46 lymph nodes were metastasized on average. Complications such as lymphedema in lower extremities, skin necrosis, seroma were occurred in 35 patients (81.4%). But most were recovered with conservative management. During 24.5(3-83) months of follow up periods, 20 patients (46.5%) had recurrences of skin cancer and 8(18.6%) of them were expired. Results: Generally, skin cancer spread to lymph nodes shows poor prognosis and inguinal lymph nodes dissection is a procedure resulting in high rate of complications. However, if this is performed properly by experienced surgeons, the recurrence and serious complications could be reduced.