전기도금을 이용한 팔라듐 나노와이어 합성 및 전기화학 촉매 특성 연구

송유정(Song, You-Jung),한상범(Han, Sang-Beom),이종민(Lee, Jong-Min),박경원(Park, Kyung-Won) 한국신재생에너지학회 2009 한국신재생에너지학회 학술대회논문집 Vol.2009 No.06

전기도금 방법을 사용해 각기 다른 환원 전압과 전기도금시간에서 Pd 수지상 나노와이어(Pd DNWs) 전극이 합성 되었으며 그 성장 기작을 논의하였다. 전기화학적인 도금 공정 동안 Pd DNWs 이<111>방향으로 성장하는 것을 확인할 수 있었는데, 이것은 전해질 속의 황산음이온들이 Pd 의 (111)면에 흡착하기 유리하기 때문이라고 사료된다. 가해준 환원전압이 증가함에 따라, 단 결정 수지상의 나노와이어의 가지는 길어지고 얇아지는 경향을 보였다. 이것은 전기도금 시간이 아니라 환원전압에 의해서만 나노와이어 가지의 직경이 조절됨을 보여준다

전기 도금법을 이용한 백금촉매에서의 촉매활성평가

송유정(Song, You-Jung),한상범(Han, Sang-Beom),이종민(Lee, Jong-Min),박경원(Park, Kyung-Won) 한국신재생에너지학회 2007 한국신재생에너지학회 학술대회논문집 Vol.2007 No.06

Pulse current 전기 도금법을 사용해 균일하고 넓은 표면적을 갖는 Pt 나노구조가 제조되었다. 도금된 Pt 나노구조의 형태와 크기 분석을 위해 SFM과 TEM이 사용되었으며, 결정성 분석에는 XRD가 사용되었다. 고분자 첨가제를 첨가하여 도금되는 Pt의 크기를 제어할 수 있었는데, 순수한 Pt에 비해 첨가제의 영향으로 크기가 제어된 나노구조의 Pt들의 평균크기는 각각 3.4 nm와 2.9 nm로 순수한 Pt 360 nm의 것에 비해 훨씬 작아진 결과를 나타낼 뿐 아니라 크기가 제어된 나노구조 Pt는 메탄올 전기 산화반응에서도 순수한 Pt보다 뛰어난 촉매활성을 가짐을 보여주었다.

대장의 크립토콕쿠스증

송재천 ( Jae Chun Song ),김상겸 ( Sang Kyum Kim ),김익성 ( Eak Seong Kim ),정인수 ( In Su Jung ),송영구 ( Young Goo Song ),유정식 ( Jeong Sik Yu ),박효진 ( Hyo Jin Park ) 대한소화기학회 2008 대한소화기학회지 Vol.52 No.4

We experienced a rare case of colonic cryptococcosis in an apparently immunocompetent individual. A 27-year-old woman admitted our hospital for intermittent melena. Initial abdominal CT scan revealed a mass lesion obstructing most of the lumen in ascending colon. Colonoscopy showed huge ulcerofungating mass in proximal ascending colon. Colonoscopic biopsy was performed and pathologic diagnosis was made as colonic cryptococcosis with positive PAS stain. Laboratory test evaluating immune status and bone marrow examination was normal. The patient was treated with intravenous amphotericin B for four weeks and six months of oral fluconazole afterwards. Follow-up abdominal CT scan and colonoscopy were taken at four weeks and seven months after the beginning of treatment. On completion of intravenous amphotericin B treatment, the mass lesion was decreased in abdominal CT and colonoscopy. After seven months, abdominal CT and colonoscopy showed near-complete resolution of the colonic lesion so the treatment ended. Cryptococcosis in a healthy individual is a rare disease and there have been only several sporadic case reports on pulmonary or central nervous system involvement. Hence, we report a case of colonic cryptococcosis in an apparently immunocompetent individual. (Korean J Gastroenterol 2008;52:255-260)

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

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)

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.

근치적 위 절제술에서 병합절제의 임상적 결과

송유정(Yu-Jeong Song),정상호(Sang-Ho Jeong),이영준(Young-Joon Lee),박순태(Soon-Tae Park),최상경(Sang-Kyung Choi),홍순찬(Soon-Chan Hong),정은정(Eun-Jung Jung),주영태(Young-tae Joo),정치영(Chi-Young Jeong),하우송(Woo-Song Ha) 대한외과학회 2010 Annals of Surgical Treatment and Research(ASRT) Vol.79 No.5

Purpose: Combined organ resection is a common operation in gastric cancer surgery. The aim of this study is to investigate the risk of combined minor organ resection (GB, gynecologic organ, appendix etc) in gastric cancer surgery. Methods: The clinical data from 673 consecutive patients who underwent gastrectomy for gastric cancer at a single center were retrospectively analyzed. We investigated clinical data between open groups (OG) and laparoscopy groups (LAG), and we divided the patients into 3 groups: no resection group, minor organ resection group and major organ (spleen, pancreas, and colon) resection group. Results: There were higher complication rates in major organ resection group (59.3%, 53.8%) than no resection (32.3%, 19.1%) or minor organ resection groups (38.7%, 20%) both in OG and LAG (P<0.05). However, there were longer hospital stays in minor (22.2 days) and major resection groups (24.1) than no resection group (16.2) in OG, but stays were longer in major resection group (30.9) than minor (14.5) and no resection group (16.2) in LAG (P<0.01). Operative times were longer in minor (287 min) and major organ resection group (310) than no resection group (243) in OG (P<0.00). However, operation time was longer in major resection group (505) than minor (415) and no resection group (370) in LAG (P=0.00). Conclusion: Combined minor organ resection with gastrectomy does not increase morbidity, and there is no statistical difference in hospital stay and op time than no resection group in LAG.

멀티미디어 처리 : 맞춤형 감성 뮤직 플레이어를 위한 음악 분류 및 추천 기법 구현

송유정 ( Yu Jeong Song ),강수연 ( Su Yeon Kang ),임선영 ( Sun Young Ihm ),박영호 ( Young Ho Park ) 한국정보처리학회 2015 정보처리학회논문지. 소프트웨어 및 데이터 공학 Vol.4 No.4

최근 한국에서는 대부분의 사람들이 안드로이드 기반의 스마트폰을 사용하고 있고, 뮤직플레이어는 어느 스마트폰에서나 찾아볼 수 있다. 그러나 뮤직 플레이어들 중 사용자의 취향이나, 음악을 듣는 성향에 맞춰진 개인화된 애플리케이션은 찾아보기 힘든 실정이다. 본 논문에서는 음악을 분석하여 감정에 따라 자동으로 분류하고, 사용자가 입력한 감정에 따라 추천하며, 사용자의 선호도를 반영하는 기능을 제공할 뿐만 아니라, 음악을 색채를 통해 시각화함으로써 사용자가 음악을 보다 쉽게 느낄 수 있도록 구현된 감성 뮤직 플레이어를 제안한다. 이를 통해 사용자는 선곡의 어려움을 해소하고 자신에게 최적화된 애플리케이션을 사용할 수 있다. Recently, most people use android based smartphones and we can find music players in any smartphones. However, it``s hard to find a personalized music player which applies user``s preference. In this paper, we propose an emotion-based music player, which analyses and classifies the music with user``s emotion, recommends the music, applies the user``s preference, and visualizes the music by color. Through the proposed music player, user could be able to select musics easily and use an optimized application.

리그닌/PVA 나노섬유 웹의 수분 특성 및 생분해성 평가

송유정 ( Youjung Song ),이은실 ( Eunsil Lee ),이승신 ( Seungsin Lee ) 한국의류학회 2017 한국의류학회지 Vol.41 No.3

The biodegradation and water absorption properties of lignin/poly(vinyl alcohol) (PVA) nanofibrous webs are investigated. Lignin/PVA nanofibrous webs containing 0, 50, and 85wt% of lignin were prepared via an electrospinning process to observe the effect of the lignin concentration on the biodegradability and water absorption properties of lignin/PVA nanofibrous webs. The morphology of the materials was examined by field emission scanning electron microscopy (FE-SEM) and atomic force microscopy (AFM). To understand the wetting behavior and hydrophilic nature of the electrospun lignin/PVA nanofibrous webs, the water absorbency, contact angle, and water uptake were examined. The enzymatic degradation of lignin/PVA nanofibrous webs was investigated using laccase by measuring total organic carbon (TOC) concentration over a course of 50 days. Water drops were absorbed immediately into all of the specimens. The water uptake of lignin/PVA nanofibrous webs increased as the amount of PVA in the lignin/PVA hybrid webs increased. The enzymatic degradation experiment indicated that the inherent biodegradability of lignin was retained after its transformation into nanofibers. Our findings imply that blending these two types of polymers is promising because it can lead to the development of a new range of multifunctional materials such as antimicrobial absorbent nanotextiles based on sustainable biopolymers.

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.