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건설산업 미청구공사의 위험성을 판별하는 핵심인자 추출에 대한 연구
유시라(You, Shira),목선수(Mok, Seonsu),지석호(Chi, Seokho),박주용(Park, Jooyong) 대한토목학회 2016 대한토목학회 학술대회 Vol.2016 No.10
최근 건설사의 잇따른 영업이익 하락과 미청구공사 금액의 증가가 한국 건설산업의 재무적 이슈로 지적되고 있다. 과도하게 쌓인 미청구공사는 손실로 전이될 가능성이 높다고 지적되고 있으며, 미청구공사가 증가할 수 있는 다양한 상황이 존재하기 때문에 기업 외부 관계자가 위험성을 사전에 판단하기란 쉽지 않은 실정이다. 게다가 미청구공사의 위험도를 판단하는 선행연구 및 판단기준의 부재와 제한적인 공시정보는 미청구공사의 정확한 파악에 대한 어려움을 가중시켰고, 이는 시장혼란 및 효율성 저하와 연결된다. 따라서 본 연구의 목표는 기업 미청구공사의 보유수준이 건전한지 혹은 위험한지 파악하는데 활용할 수 있도록 재무제표 상의 계정들 중 미청구공사와 관련이 있는 핵심인자를 추출하고자 한다. 첫째로 문헌고찰과 전문가 인터뷰를 통해 변수를 선정했고, 선정된 변수에 대한 데이터를 수집하였다. 둘째로, 수집된 데이터를 매출액 분위별로 나눠서, 어떤 변수가 미청구공사에 영향을 미치는지 회귀분석을 통해 분석하였다. 또한 경영악화를 기록한 데이터에 대해서도 매출액 분위별 분석을 실시하여, 손실로 전이될 가능성이 높은 미청구공사에 영향을 미치는 변수를 확인하였다. 본 연구에서의 결과는 향후 미청구공사의 위험성을 판단하는 기준 설정에 사용될 수 있을 것이다.
유시현 ( Sie Hyun You ),윤주희 ( Joo Hee Yoon ),신은영 ( Eun Young Shin ),유영옥 ( Young Oak Lew ),김대훈 ( Dae Hoon Kim ) 대한산부인과학회 2007 Obstetrics & Gynecology Science Vol.50 No.5
Objective: Elective surgical approaches and trauma cause changes in the production of different cytokines. The aim of this study was to evaluate the effects of laparoscopic surgery on the immune system of patients with gynecologic diseases. Methods: We recruited the open surgery group (n=20) and laparoscopic surgery group (n=33). In a prospective study we examined the C-reactive protein (CRP) level, the production of the cytokines Interleukin-1β (IL-1β), Interleukin-6 (IL-6), Interleukin-8 (IL-8), Interleukin-10 (IL-10) and TNF-α concentrations by ELISA. In addition the fibrinogen, transferrin, albumin, hemoglobin and hematocrit were measured. Statistical analysis was made by Mann-Whitney U test and Kruskal-Wallis test. Results: There were significant statistical differences in the CRP, IL-6 and IL-8 between the open surgery group and laparoscopic surgery group after surgery. The CRP and IL-8 showed a more distinct increase in open surgery group 24 hours after surgery, the differences between the two surgical approaches were significant (p<0.05). Conclusion: Elective surgical approaches cause changes in the immune system, which can be evaluated by the reaction of cytokines. Laparoscopic surgery cause less activation of the CRP and IL-8 than open surgery.
김두만 ( Du Man Kim ),유시현 ( Sie Hyun You ),윤주희 ( Joo Hee Yoon ) 대한산부인과학회 2006 Obstetrics & Gynecology Science Vol.49 No.9
The incidence of all malignant tumor in pregnancy is 0.07-0.1%. The most frequent tumors in pregnancy are breast cancer, gynecologic tumors (cervical cancer, ovarian cancer), melanoma and lymphomas. Any malignant tumor in pregnancy has a diagnostic and therapeutic problem. Melanoma is 8% of all malignancies in pregnancy. Surgery is a definitive therapy for early-stage disease. Melanoma in pregnancy metastasize early and rapidly. So we have difficulty in making therapeutic plan. Most frequent metastatic lesions are liver and lung. We experienced melanoma of liver in pregnancy. This report represents melanoma in pregnancy with a review of literature.
SCOPUS 문헌 정보 분석을 통한 머신 러닝 활용 BIPV 연구 동향
이제현(Lee Jehyun),유시현(You Sihyun),김창기(Kim Chang Ki),오명찬(Oh Myeongchan),김보영(Kim Boyoung),강용혁(Kang Yong-Heack),김현구(Kim Hyun-Goo) 한국태양에너지학회 2022 한국태양에너지학회 논문집 Vol.42 No.3
With the accelerated development of science and technology across fields, publications in almost all fields have increased exponentially every year. According to the Scopus search, the number of papers related to buildings and solar energy that used machine learning has grown at an average annual rate of 16.1%, exceeding 3000 publications since 2019. Review papers have been published consistently since 2010, demonstrating that they are on a trajectory of initial growth. Because there is a limit to reading and analyzing large quantities of papers every year, we developed a methodology that reads, analyzes, and visualizes published literature information. In this method, we provide a query to the Scopus database to retrieve data and then visualize the number of publications by year, journal, and keyword along with other analyses results. The relationship and frequency analyses results can also be shown among words in titles, keywords, and abstracts. Analysis of research on building-integrated photovoltaics yielded the result that publishing on Energy and Buildings (impact factor [IF] 4.067, modified rank normalized impact factor [mrnIF] top 1.7%) and Solar Energy (IF 4.018, mrnIF top 1.7%) is active. Over the past 10 years, approximately 1–1.5% of machine learning-related research has been published, with a gradual increase.
각 (脚)이 있는 거대 점막하 자궁근종의 질외 탈출에 의한 자궁내반 (內反)의
송민종 ( Min Jong Song ),유시현 ( Sie Hyun You ),서민정 ( Min Jung Suh ),국일영 ( Ill Young Kook ),윤주희 ( Joo Hee Yoon ) 대한산부인과학회 2007 Obstetrics & Gynecology Science Vol.50 No.2
Uterine leiomyomas are the most common uterine tumors. They are estimated to be present in approximately 20% of all women of reproductive age. They may be present in subserosal, intramural, or submucosal in location within the uterus, or located in the cervix, in the broad ligaments, or on a pedicle. Many studies report that the malignant potential of a preexisting uterine leiomyoma is extremely rare, occuring in less than 0.5%. Uterine leiomyomas may cause a range of syptoms, for example, severe anemia from abnormal uterine bleeding, dysmenorrhea, constipation from rectosigmoid compression, dysuria, frequency, residual sensation due to bladder compression. Patients with those symptoms or cancer phobia should be treated. Rare but severe symptoms associated with uterine leiomyomas are rectosigmoid compression, with intestinal obstruction, thrombophlebitis of lower extremities from venous stasis, polycythemia, ascites, severe pain from torsion and infection of prolapsed pedunculated submucosal myoma and uterine inversion from prolase of pedunculated submucosal leiomyoma. Now we report a rare case of uterine inversion resulted from prolapse of huge pedunculated uterine submucosal leiomyoma, which caused hypovolemic shock due to massive uterine bleeding.