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LSTM을 활용한 골든크로스 사건 기반 주식 변동률 예측
남수민,김지은,이준기 한국컴퓨터정보학회 2023 韓國컴퓨터情報學會論文誌 Vol.28 No.8
The Golden Cross is commonly seen as a buy signal in financial markets, but its reliability for predicting stock price movements is limited due to market volatility. This paper introduces a time-invariant approach that considers the Golden Cross as a singular event. Utilizing LSTM neural networks, we forecast significant stock price changes following a Golden Cross occurrence. By comparing our approach with traditional time series analysis and using a confusion matrix for classification, we demonstrate its effectiveness in predicting post-event stock price trends. To conclude, this study proposes a model with a precision of 83%. By utilizing the model, investors can alleviate potential losses, rather than making buy decisions under all circumstances following a Golden Cross event.
Clinicopathologic Analysis of Lateral Margin Measured by Whole-Mount Section in T3 Rectal Cancer
남수민,홍영기,최윤정,Jung Gu Kang 대한대장항문학회 2020 Annals of Coloproctolgy Vol.36 No.3
Purpose: Total mesorectal excision is a standard technique for rectal cancer. The whole-mount section can encompass the entire specimen, so it is a more appropriate for measuring circumferential margin than conventional section. We analyzed the clinical characteristics and prognosis based on lateral margins (LMs) measured by whole-mount sections. Methods: Medical records of patients who were operated on for T3 rectal cancer from 2005 to 2015 were reviewed retrospectively. A total of 154 patients were included. The slides of the whole-mount sections were re-reviewed by a single pathologist. Results: We divided the groups according to the length of the LM (1 mm, 1.5 mm, and 2 mm). There was significantly frequent lymphovascular invasion and N state was higher when LM was short in all groups. There were more micrometastasis in group LM ≤1 mm (53.3% ≤1 mm vs. 26.6% >1 mm, P=0.039), but not in other groups. When looking at local recurrence alone, there was no significant difference between groups, but the 5-year local recurrence-free survival was significantly worse when LM ≤2 mm (P=0.050). In each analysis based on 1 mm and 1.5 mm, overall survival was worse when LM was short. In all groups, disease-specific survival was worse when LM was short. Conclusion: As previously known, securing a margin less than 1 mm negatively affects the prognosis. When LM was divided by 1.5 mm, there was a significant difference in overall survival. There was a significant difference in disease-specific survival when divided by 2 mm in T3 rectal cancer. However, further studies with more patients are necessary to secure the result.
부정적 완벽주의와 생도생활 적응의 관련성에서 역기능적 자기평가의 매개효과
남수민,현승주,이종환 육군사관학교 화랑대연구소 2022 한국군사학논집 Vol.78 No.1
본 연구는 부정적 완벽주의와 생도생활 적응의 관계에서 역기능적 자기평가의 매개효과를 검증하기 위한 목적으로 수행되었다. 사관생도 195명을 대상으로 부정적 완벽주의 역기능적 자기평가, 생도생활 적응 수준을 알아보는 설문 조사를 실시한 후, 이를 바탕으로 부정적 완벽주의가 역기능적 자기평가를 매개하여 생도생활 적응에 영향을 미치는 모형을 설정하고 검증하였다. 분석 결과, 부정적 완벽주의는 역기능적 자기평가를 완전 매개하여 생도생활 적응에 부정적 영향을 미치는 것으로 나타났다. 역기능적 자기평가의 영향을 통제하면 부정적 완벽주의는 생도생활 적응에 통계적으로 유의한 영향을 미치지 않는 것으로 나타났으며, 오히려 정적인 관련성을 보였다. 이러한 결과는 완벽주의 그 자체보다는 역기능적 자기평가를 완화할 수 있는 개입이 생도들의 적응을 효과적으로 높일 수 있다는 점을 시사한다. 논의에서는 역기능적 자기평가를 낮출 수 있는 개입 방안을 고찰하였으며, 본 연구의 의의와 한계를 제시하였다.
Risk Factors for Colorectal Cancer in Korea: A Population-Based Retrospective Cohort Study
남수민,최윤정,김동욱,박은철,강중구 대한대장항문학회 2019 Annals of Coloproctolgy Vol.35 No.6
Purpose: The incidence of colorectal cancer in Korea has recently increased, making it the second most common cancer in men and the third most common cancer in women. Risk factors for colorectal cancer have been studied worldwide, but risk factors specific for the Korean population have not been established. In this study, we investigated incidence trends and risk factors of colorectal cancer in Korea. Methods: A total of 8,846,749 subjects were included. Colorectal cancer incidence was investigated using Korea National Health Insurance Service claim data from 2004 to 2014. Colorectal cancer diagnoses were obtained by evaluating colorectal cancer diagnostic codes and the cancer registry for cost sharing. Risk factor identification for colorectal cancer was obtained from National Health Examination data from 2004 to 2005. Cox proportional hazard model statistical analysis was used to determine risk factors of colorectal cancer. Results: The incidence of colorectal cancer gradually increased from 2006 to 2014 (from 45.4/100,000 to 54.5/100,000). There was a predominance among men (1.47:1), but incidence trends were similar in both sexes. Old age, high body mass index, and no history of colonoscopy were identified as risk factors in both sexes. High fasting blood glucose, familial history of cancer, frequent alcohol intake, and current smoker were identified as risk factors, especially in men. Conclusion: The incidence of colorectal cancer has been increasing in Korea. Colonoscopy screening was a protective factor for colorectal cancer, and active use of colonoscopy may reduce incidence. Early diagnosis and care are important, particularly for the high-risk group.
일시적인 갑상선중독증을 동반한 소아의 급성 갑상선주위염 1예
남수민,이미영,고장현,성기준,정춘희 대한내분비학회 2006 Endocrinology and metabolism Vol.21 No.2
Acute thyroiditis is a rare disease because of the sufficient supply of blood vessels and lymphatics in thyroid tissue, the high concentration of iodide in the thyroid tissue and the nearly completely isolated structure of the thyroid gland from the surrounding tissue via its capsule. The most common route of infection is from a pyriform sinus fistula and then the inflammation spreads from the sinus to the perithyroidal space. Computed tomography (CT) and magnetic resonance imaging (MRI) can show a low echogenic mass encircling thyroid gland and swelling of the perithyroidal tissue in acute suppurative thyroiditis. We experienced a case of acute perithyroiditis with thyrotoxicosis that developed in a 13-year old boy and he was diagnosed by the CT findings. The patient had complained of a low graded fever and neck swelling. The laboratory diagnosis and clinical course was like that of subacute thyroiditis, but the CT finding showed a show low echogenic mass encircling the thyroid glands and swelling of the perithyroidal tissue. Therefore, we diagnosed this patient with acute perithyroiditis. After treatment with antibiotics, he displayed clinical improvement and was discharged. (J Kor Soc Endocrinol 21:142~145, 2006) 본 환자의 증례는 영상 진단상 갑상선중독증을 동반한 급성 갑상선주위염으로 진단하였으며 이에 문헌고찰과 함께 보고하는 바이다.
Synthesis of Two step Indole Derivatives in a Continuous Flow System
남수민,박찬필 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.1
Indole derivatives are used as antibiotics in pharmaceuticals and have various physiological and biological characteristics such as antipyretic, anti-fungal and anti-inflammatory. In this study, the reaction proceeds in two steps. First of all, the first reaction is C3-formylation of indole in the microreactor. As a secondary reaction, the synthesis of Tri(indolyl)methanes(TIM) is carried out by acid catalyst reaction using Indole and Indole-3-carboxyaldehyde synthesized by C3-formylation of Indole. In the case of the first reaction, the microreactor optimized various parameters to obtain 76% yield in 10 minutes. However, the secondary reaction TIM synthesis is difficult to apply to the microreactor because the product is solid. In this study, the problem of solid formation in the Microreactor can be solved by generating product and disperse phase using mineral oil as a carrier phase during synthesis.