주가예측을 위한 차트 유형별 필터링 구현

송유정(Yoojeong Song),김도희(Dohee Kiim),원희수(Heesoo Won),이종우(Jongwoo Lee) 한국정보과학회 2018 한국정보과학회 학술발표논문집 Vol.2018 No.12

좌측 간내 결석 환자에서 복강경 간절제의 유용성

송유정(Yu-jeong Song),김가정(Ka-Jeong Kim),문형곤(Hyung-Gon Moon),정상호(Sang-Ho Jeong),주영태(Young-Tae Ju),정은정(Eun-Jung Jung),이영준(Young-Joon Lee),홍순찬(Soon-Chan Hong),최상경(Sang-Kyung Choi),하우송(Woo-Song Ha),박순태(Soon- 대한외과학회 2010 Annals of Surgical Treatment and Research(ASRT) Vol.78 No.1

Purpose: Recently, there have been several studies on the early results of hepatectomy for various intrahepatic lesions. We report the early experience of our hospital after total laparoscopic left hepatectomy in patients with intrahepatic stones in the left hemi-liver. Methods: We retrospectively analyzed the medical records of patients who were diagnosed with left intrahepatic stones and underwent hepatectomy between January 2007 and June 2009. The patients were grouped according to operative procedure into open hepatectomy, laparoscopy-assisted hepatectomy, and total laparoscopic hepatectomy. Results: There were 31 patients who underwent Lt hemihepatectomy and Lt lateral sectionectomy during this period. Hepatectomy with open method, laparoscopy-assisted method, and total laparoscopy method were performed in 10, 14, and 7 cases. There were no significant differences between the three methods for operating time and postoperative complications. But the number of fasting times and hospital days was shorter with total laparoscopic hepatectomy than with others. Conclusion: Total laparoscopic liver resection is a safe and useful method for treating patients with intrahepatic stones and offers the advantage of quick patient recovery. Careful selection of appropriate patients and further development in the laparoscopic surgical technique resulting from accumulated experiences will help enable the laparoscopic hepatectomy to be performed more easily and safely in patients with intrahepatic stones.

남녀 청소년의 냉담-무정서 특질과 학교폭력 가해행동의 관계에서 부모-자녀관계의 조절효과

송유정,이소연 한국아동학회 2019 한국아동학회 학술발표논문집 Vol.2019 No.11

Size-Controlled Cu2O Nanocubes by Pulse Electrodeposition

송유정,박경원,한상범,Hyun-Hwi Lee 한국전기화학회 2010 한국전기화학회지 Vol.13 No.1

In this work, highly uniform size-controlled Cu2O nanocubes can be successfully formed by means of pulse electrodeposition. The size distribution, crystal structure, and chemical state of deposited Cu2O nanocubes are characterized using scanning electron microscopy, transmission electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. The phase transition from Cu2O to Cu can be controlled by constant current electrodeposition as a function of deposition time. In particular, the size of the Cu2O nanocubes can be controlled using pulse electrodeposition as a function of applied current density.

신체자각을 중심으로 한 요가프로그램이 비만 아동의 신체상, 자아존중감 및 스트레스에 미치는 효과

송유정(Song Yu-Jeong),이동훈(Lee Dong-Hun) 경성대학교 인문과학연구소 2011 인문학논총 Vol.26 No.-

본 연구는 초등학교 비만 아동을 대상으로 신체자각 중심의 요가프로그램이 신체상, 자아존중감, 스트레스에 어떠한 효과를 미치는지 알아보고자 하였다. 이를 위해 부산광역시에 소재하고 있는 D초등학교 4, 5, 6학년 중 비만 아동 30명을 실험집단 15명, 통제집단 15명으로 집단을 편성하였다. 신체자각을 중심으로 한 요가프로그램은 실험집단을 대상으로 요가자세, 호흡, 명상이 결합된 요가프로그램을 주 2회 40분씩 총 24회기를 실시하였다. 요가프로그램 실시 전, 후에 신체상 척도, 자아존중감 척도, 스트레스 척도를 사용하였고 공변량 분석(ANCOVA)을 실시하였다. 연구결과 신체자각 중심의 요가프로그램은 비만 아동의 신체상이 유의미하게 향상되었으며, 자아존중감 향상에도 유의미한 차이가 나타났다. 신체자각을 중심으로 한 요가프로그램은 스트레스를 감소시키는데 통계적으로 유의미한 차이가 나타나지 않았다. 본 연구는 비만으로 인한 신체적, 심리적 부적응 문제를 가지고 있는 비만 아동을 대상으로 신체자각 중심 요가프로그램을 실시하여 프로그램 효과의 유의성을 검증해냈다는 점에서 의의가 있다. The purpose of this study was to evaluate the effect of the body-awareness centered Yoga program on obese elementary school children’s body-image, self-esteem and stress. This study investigated 30 elementary students who had obesity among fourth, fifth, and sixth graders in “D” elementary school in Busan. The students were divided into two groups, 15 students for the treatment group and 15 for the control group. For the statistical analysis, ANCOVA was used. In addition, a contextual analysis was used through the children’s comments. First, the improvement of the body-images in the treatment group was significantly higher than the control group (F=13.33, P<.01). Second, the improvement of the self-esteem in the treatment group was significantly higher than the control group (F=5.09, P<.05). Third, the proposed Yoga program provided the obese children with some positive effects to decrease the stress, but it was not significant. In conclusion, the bodyawareness centered Yoga Program had a positive effect on the body-images, self-esteem and reduced stress of the obese children who were less physically active than the normal children by awaring the change of their body-images.

비장둔상의 수술적 치료를 대체하는 혈관색전술의 유용

송유정 ( Yu Jeong Song ),김가정 ( Ka Jeong Kim ),정상호 ( Sang Ho Jeong ),정치영 ( Chi Young Jeong ),주영태 ( Young Tae Ju ),정은정 ( Eun Jung Jung ),이영준 ( Young Joon Lee ),최상경 ( Sang Kyung Choi ),하우송 ( Woo Song Ha ),박 대한외상학회 2010 大韓外傷學會誌 Vol.23 No.1

Purpose: Over the past few decades, the treatment of traumatic splenic injuries has shifted to nonoperative management from surgical intervention. Although some nonoperative management failure have been reported, in most trauma centers, nonoperative management is now believed to be the treatment of choice in hemodynamically stable patients. Then, in this study, we have retrospectively evaluated our experience with traumatic splenic injury. Methods: From January 2005 to July 2009, 150 patients with blunt splenic injuries were managed in our hospital. Patients``charts were retrospectively reviewed to analyze their treatment, the patients were grouped according to those who had been admitted before October 2006, defined as the early group, and those who had been admitted after October 2006, defined as the late group. After the patients had been divided into two group, physiologic parameters and differences between the treatments were compared. Results: 150 patients were admitted to our hospital with blunt splenic trauma. In late group, both the surgical management rate and the nonoperative management failure rate were lower than they were in the early group. Conclusion: We expect angioembolization to effectively replace surgery for the treatment of selected patients with blunt splenic injury and to result in fewer complications. (J Korean Soc Traumatol 2010;23:43-48)

[토론문] 지속가능한 사회복지조직을 함께 만들어 가자.

송유정 한국사회복지행정학회 2019 한국사회복지행정학회 학술대회 자료집 Vol.2019 No.10

LSTM-Autoencoder 모델을 활용한 서울의 봄철 지면 온도 예측

송유정,박지수,김찬수 한국기상학회 2023 한국기상학회 학술대회 논문집 Vol.2023 No.11

LSTM-Autoencoder 모델을 활용한 서울의 봄철 지면 온도 예측

송유정,박지수,김찬수 한국기상학회 2023 한국기상학회 학술대회 논문집 Vol.2023 No.10

최고경영진(Top Management Team)의 동질성이 주가급락위험에 미치는 영향

송유정,박두리,변상혁 한국회계정책학회 2023 회계와 정책연구 Vol.28 No.4

[연구목적]본 연구에서는 최고경영진의 동질성 수준이 주가급락위험에 미치는 영향을 규명하는 데 목적이 있다. 더불어 최고경영진의 동질성과 주가급락위험 간의 관계에 최고경영자의 영향력과 기업지배구조의 조절효과를 검증하고자 한다. [연구방법]분석대상은 2013년부터 2019년까지의 코스피, 코스닥 시장에 상장된 기업이다. 나이, 성별, 교육수준과 업무 경험을 토대로 Herfindahl-Hirschman Index를 사용하여 최고경영진의 동질성 수준을 측정하였으며, 주가급락위험을 음(-)의 조건부 왜도와 하락-상승주간 변동성 비율로 설정하여 회귀분석을 진행하였다. [연구결과]실증분석결과, 최고경영진의 동질성 수준이 높을수록 미래 주가급락위험이 증가하는 것으로 나타났다. 이는 최고경영진의 동질성이 높을수록 기업의 불투명성 증가로 인해 주가급락위험이 증가하는 것으로 해석할 수 있다. 다음으로, 최고경영진 동질성과 주가급락위험 사이의 양(+)의 관계는 최고경영자의 영향력이 클수록 강화되는 한편, 사외이사 비율이 높을수록, 외국인투자자 지분율이 높을수록, BIG4 감사인에게서 감사를 받은 기업일수록 최고경영진 동질성과 주가급락위험 사이의 양(+)의 관계가 약화되는 결과를 제시하였다. [정책적 시사점]본 연구는 주가급락위험에 대한 요인으로 최고경영진의 동질성을 고려함으로써 관련 문헌을 확장하고, CEO의 영향력을 실증적으로 검증해보았다는 점과 최고경영진에 대한 효율적 감시기능을 수행하는 건전한 기업지배구조의 중요성을 환기하였다는 점에서 의의가 있다. 즉, 기업지배구조의 리스크 관리에 대한 역할을 강조하여 자본 시장과 정부의 기업지배구조 정책에 대한 시사점을 제시한다. [Purpose]We examines the impact of top management team (TMT) homogeneity on stock price crash risk. In addition, we also explore the moderating effects of the CEO power and corporate governance on the relationship between TMT homogeneity and stock price crash risk. [Methodology]Our sample consists of Korean companies listed on the KOSPI and KOSDAQ markets from 2013 to 2019. The homogeneity level of the TMT was measured using the Herfindahl-Hirschman Index based on age, gender, education level, and work experience. We adopt the negative (-) conditional skewness and the ratio of down-to-up volatility as proxies for stock price crash risk. We employ the OLS regression as our main analyses. [Findings]The results of our empirical analyses show the positive relation between the homogeneity level of the TMT and the future stock price crash risk. This finding can be inferred as the outcome of increase in information asymmetry and a decrease in corporate transparency driven by high level of TMT homogeneity. Furthermore, the positive relationship between TMT homogeneity and stock price crash risk is strengthened when the CEO power is stronger. Whereas the relation is mitigated (1) when the ratio of outside directors is higher, (2) when the foreign investor ownership ratio is higher, and (3) when the company hires one of the BIG4 auditors. [Policy Implications]This study contributes to the literature about stock crash risk by investigating top management team homogeneity as a factor in stock price crash risk. By providing evidence that strong corporate governance mitigates the effect of TMT homogeneity on stock crash risk, this study calls for attention to the role of transparent corporate governance structure that performs an efficient monitoring function on the top management team. Thereby it provides policy implications for the corporate governance.