슬링(sling)과 고정된 지지면에서의 팔굽혀펴기 동작 시 근 활성도 비교

오재섭,박준상,김선엽,권오윤 한국전문물리치료학회 2003 한국전문물리치료학회지 Vol.10 No.3

8.3% Carbamide Peroxide 함유 펜 형 자가미백제인 BIancTis Forte의 색조개선 및 안전성에 관한 임상연구

이진경,민선홍,홍성태,오소람,정신혜,황영혜,유성엽,배광식,백승호,이우철,손원준,금기연 대한치과보존학회 2009 Restorative Dentistry & Endodontics Vol.34 No.2

This clinical study evaluated the whitening effect and safety of polymer based-pen type BlancTis Forte(NIBEC) containing 8.3% carbamide peroxide. Twenty volunteers used the BlancTis Forte whitening agent for 2 hours twice a day for 4 weeks As a control. Whitening Effect Pen (LG) containing 3% hydrogen peroxide was used by 20 volunteers using the same protocol. The change in shade (ΔE^(*) color difference) was measured using Shadepilot™ (DeguDent) before, during and after bleaching (2 weeks, 4 weeks and postbleaching 4 weeks). A clinical examination for any side effects (tooth hypersensitivity or soft tissue complications) was also performed at each check-up. The following results were obtained. 1 Both the experimental and control groups displayed a noticeable change in shade (ΔE) of over 2 No significant differences were found between the two group (p>0.05) implying that the two agents have a similar whitening effect. 2 The whitening effect was mainly due to changes in a and b values rather than in L value (brightness). The experimental group showed a significantly higher change in b value thus yellow shade than the control(p < 0.05) 3 None of the participants complained of tooth hypersensitivity or soft tissue complications confirming the safety of both whitening agents 8.3%의 carbamide peroxide를 함유한 펜형 코팅용 미백제인 BlancTis Forte (NIBEC, Seosul & JinCheon)를 실험군으로, 3% hydrogen peroxide를 함유한글 Whitening Effect Pen (LG. Seoul) 제재를 대조군으로 각각 피험자 20명에게 2시간씩 1일 2회 제조사의 지시대로 치아표면에 4주간 적용하도록 지시하고 색조개선 효능과 안전성을 평가하였다. 미백 효과는 미백 전 및 미백 2주, 4주 및 미백 종료 4주 후에 Shadopilot™을 이용하여 색 변화를 측정하였고, 매 내원시기마다 모든 환자는 치수생활력 검사와 치주 및 치태 검사를 통해 부작용 여부 (치아과민증 및 구감 내 연조직의 부작용)를 기록한 후 다음과 같은 결과를 얻었다. 1.실험군 및 대조군의 색 변화량 (ΔE)은 2이상으로 인지할 수 있는 색 변화를 보였으며, 두 제품 간에는 통계적으로 유의한 차이를 보이지 않아 (p > 0.05) 유사한 미백효능을 나타냄을 알 수 있었다. 2,미백효과는 명도의 개선보다는 주로 a. b값의 변화에 의한 것으로 특히 실험군에서 b값의 변화, 즉 황색조의 개선효과가 대조군에 비해 유의성 있게 높은 것으로 나타났다 (p <0.05). 3.치아나 치은의 과민증이나 이상증상을 호소하는 피험자는 없어 두 제품 모두 안전성을 확인할 수 있었다.

치아미백제의 미백효과에 관한 연구

이용근,이흥수,이성재,방기숙,오상엽 원광대학교 생체재료·매식연구소 1996 원광생체재료·매식 Vol.5 No.2

Human teeth vary widely in color. Practitioner and patients are concerned with preventing and correcting discolored or dark teeth to achieve and maintain stain-free, white teeth. Tooth brushing cannot after tooth color but it can remove adherent films and stains. Esthetics of natural dentition can be improved by bleaching and this process can be applied to intrinsically and extrinsically stained teeth. The need for a brighter, more attractive smile has made rapid growth in the marker for tooth whiteners. There is no doubt these products work as whiteners, at least on mild to moderate stains, but the safety of these products are unclear. In this experiment, the effect of tooth whitener application on the color of extracted human enamel was measured. RMS, RMT and NWT were used as tooth whiteners, and tooth paste(ETQ) and hydrogen peroxide solution(HPO) were used as controls. 35 caries-free extracted human molars were embedded and polished with the exposed enamel diameter of 4 mm. The tooth whiteners and control agents were according applied to the manufacturers' instructions of clinically simulated procedures for eight weeks, and measurements were repeated every two weeks. CLELAB color difference(ΔE^*) was measured using Differential Colorimeter(Model TC-6FX, Denshoku Co., Japan). The results were are follows ; 1. After application of tooth whiteners and controls for eight weeks, the color change of all groups were not significantly different from each other (p>0.01). But after application of agents for 2 weeks and four weeks, the color difference of NWT applied group and HPO applied group were significantly higher than those of others(p<0.01). 2. The application of tooth paste and paste type tooth whitener made gradual color change, but hydrogen peroxide gel type whitener and hydrogen peroxide solution made rapid color change during initial application period.

Nanosized CuO and ZnO Catalyst Supported on Honeycomb-Typed Monolith for Hydrogenation of Carbon Dioxide to Methyl Alcohol.

Park, Chul-Min,Ahn, Won-Ju,Jo, Woong-Kyu,Song, Jin-Hun,Oh, Chang-Yeop,Jeong, Young-Shin,Chung, Min-Chul,Park, Kwon-Pil,Kim, Ki-Joong,Jeong, Woon-Jo,Sohn, Bo-Kyun,Jung, Sang-Chul,Lee, Do-Jin,Ahn, Byeon American Scientific Publishers 2015 Journal of Nanoscience and Nanotechnology Vol.15 No.1

<P>The greenhouse effect of carbon dioxide (CO2) has been recognized as one of the most serious problems in the world. Conversion of CO2 to methyl alcohol (CH3OH) was studied using catalytic chemical methods. Honeycomb-typed monolith used as catalyst support was 400 cell/inch2. Pretreatment of the monolith surface was carried out by thermal treatment and acid treatment. Monolith-supported nanosized CuO-ZnO catalysts were prepared by wash-coat method. The prepared catalysts were characterized by using SEM, TEM, and XRD. The catalytic activity for CO2 hydrogenation to CH3OH was investigated using a flow-type reactor with varying reaction temperature, reaction pressure and contact time. Conversion of CO2 was increased with increasing reaction temperature, but selectivity to CH3OH was decreased. Optimum reaction temperature was about 250 degrees C under 20 atm. Because of the reverse water gas shift reaction.</P>

ASTD를 통해 본 인적자원개발의 최근 동향

오헌석,최윤미,배진현,위현진,배형준,권귀헌,선우형,성문주,이도엽,이상훈 한국직업능력개발원 2009 직업능력개발연구 Vol.12 No.1

이 연구는 지난 5년간 ASTD 국제학술대회에서 발표된 내용을 중심으로 HRD의 최근 동향을 분석하는 것을 목적으로 수행하였다. 이를 위해 주제분석 방법을 응용하여 2004년부터 2008년까지 ASTD 대회에서 발표된 자료들을 분석하였다. 그 결과 ① 훈련에서 학습, 학습에서 성과로의 HRD 패러다임의 변화, ② 인재에 대한 새로운 관점의 등장, ③ 개인코칭에서 팀코칭으로 코칭의 대상 확대, ④ 조직변화관리에서 조직문화에 대한 관심 증가, ⑤ 인재경영의 부상과 인재보유의 강조, ⑥ 경험과 실제 과제 수행을 중심으로 한 학습 무대의 이동, ⑦ 세대별 특성을 반영한 HRD 전략 수립, ⑧ 일과 삶의 관계의 변화, ⑨ HRD시스템 구축 기준으로서 WLP 성과표의 부각, ⑩ Kirkpatrick의 1, 2 수준 평가에서 ROI 및 성공사례분석으로의 변화 등 10가지 핵심 동향을 도출하였다. 이 연구의 결과는 HRD실무자와 연구자들에게 이 분야의 최신 동향을 파악하기 위한 기초 자료로 활용될 수 있을 것이다. This study was conducted to explore major trends and issues of human resource development m the light of the presentation contents of ASTD(American Society for Training and Development) International Conference and Exposition held during the past five years(2004~2008). Major outstanding issues in presentation sessions, keynote speeches, and legend series delivered at the conference were analyzed in terms of their themes and major issues. Theme analysis which is one of the types of document analysis was used in order to identify frequently cited themes and issues. Through the analysis, 10 major issues of HRD were drawn. Based on these analyses, Practical and theoretical implications for HRD professionals and researchers were suggested.

A Study of the Convertible Bond Index and the Investment Performance Using Rough Set

Sung Yeop Lee,Jun Hyuk Yang,Bong Ju Jeong,Kyong Joo Oh 계명대학교 자연과학연구소 2019 Quantitative Bio-Science Vol.38 No.1

Among mezzanine securities, convertible bonds are the most frequently issued products in the domestic and foreign security markets. However, the mezzanine market in Korea is developed mainly as a private placement market, which is difficult for individual investors to approach. Related products have been released recently, but the minimum subscription is high, and with no published convertible bond index, this type of investment is difficult to evaluate and its performance hard to measure. In this study, we confirm that the characteristics of the convertible bond index as an investment product are similar to those of the stock price index, using correlation and chaos analyses (e.g., Hurst exponent analysis), correlation dimension analysis, and maximum Lyapunov exponent analysis based on the global convertible bond index. At the same time, we establish an investment strategy based on the rough set theory and find that the convertible bond index, unlike the stock index, has a defensive tendency in the downside market. This research contributes to the development of the convertible bond index in the domestic market and the design of financial products based on this index.

Risk factors for parastomal hernia: based on radiological definition

Sung Yeon Hong,Seung Yeop Oh,Jae Hee Lee,Do Yoon Kim,Kwang Wook Suh 대한외과학회 2013 Annals of Surgical Treatment and Research(ASRT) Vol.84 No.1

Purpose: The aim of this study was to investigate the clinical and radiological incidence of parastomal hernia and to analyze the risk factors for parastomal hernia. Methods: We reviewed retrospectively 108 patients with end colostomy from January 2003 to June 2010. Age, sex, surgical procedure type, body mass index (kg/m2), stoma size, and respiratory comorbidity were documented. Results: There were 61 males (56.5%) and 47 females (43.5%). During an overall median follow-up of 25 months (range, 6 to 73 months), 36 patients (33.3%) developed a radiological parastomal hernia postoperatively and 29 patients (26.9%) presented with a clinical parastomal hernia. In multivariate analysis, gender (odds ratio [OR], 6.087; P = 0.008), age (OR, 1.109; P = 0.009) and aperture size (OR, 6.907; P 〈 0.001) proved to be significant and independent risk factors after logistic regression analysis. Conclusion: This study showed that the incidence of radiological parastomal hernia is higher than clinical parastomal hernia. Risk factors for parastomal hernia proved to be female, age, and aperture size.

Routine barium enema prior to closure of defunctioning ileostomy is not necessary

Sung Yeon Hong,Do Yun Kim,Seung Yeop Oh,Kwang Wook Suh 대한외과학회 2012 Annals of Surgical Treatment and Research(ASRT) Vol.83 No.2

Purpose: The use of barium enemas to confirm the anastomotic integrity prior to ileostomy closure is still controversial. The purpose of the study was to determine the utility of routine contrast enema prior to ileostomy closure and its impact on patient management in patients with a low pelvic anastomosis. Methods: One hundred forty-five patients had a temporary loop ileostomy constructed to protect a low colorectal or coloanal anastomosis following low anterior resection for rectal cancer. All patients were evaluated by physical examination, proctoscopy, and barium enema prior to ileostomy closure. Results: The median time from ileostomy creation to closure was 8 months. Five (3.5%) of the 144 patients were found to have clinically relevant strictures at the colorectal anastomosis on routine barium enema. One patient (0.7%) showed anastomotic leak on their barium enema. Overall, 141 patients (97.9%) had an uncomplicated postoperative course. Postoperative complication occurred in three patients (2.1%). None of them showed abnormal barium enema finding, which suggested that routine contrast enema examination did not predict postoperative complication. Conclusion: Routine barium enema evaluation of low pelvic anastomoses before loop ileostomy closure did not provide any additional information for postoperative colorectal anastomotic complication.

Three-dimensional Structure of Outer Segment of Photoreceptor Cell in Pineal Body of the Mudfish, Misgurnus anguillicaudatus

Oh, Chang Seok,Choi, Tai Yeop,Park, Sung Sik,Yoon, Jae Rhyong Chonnam National UniversityResearch Institute of 1993 Chonnam journal of medical sciences Vol.6 No.2

Study on multi-unit level 3 PSA to understand a characteristics of risk in a multi-unit context

Oh, Kyemin,Kim, Sung-yeop,Jeon, Hojun,Park, Jeong Seon Korean Nuclear Society 2020 Nuclear Engineering and Technology Vol.52 No.5

Since the Fukushima Daiichi accident in 2011, concerns for the safety of multi-unit Nuclear Power Plant (NPP) sites have risen. This is because more than 70% of NPP sites are multi-unit sites that have two or more NPP units and a multi-unit accident occurred for the first time. After this accident, Probability Safety Assessment (PSA) has been considered in many countries as one of the tools to quantitatively assess the safety for multi-unit NPP sites. One of the biggest concerns for a multi-unit accident such as Fukushima is that the consequences (health and economic) will be significantly higher than in the case of a single-unit accident. However, many studies on multi-unit PSA have focused on Level 1 & 2 PSA, and there are many challenges in terms of public acceptance due to various speculations without an engineering background. In this study, two kinds of multi-unit Level 3 PSA for multi-unit site have been carried out. The first case was the estimation of multi-unit risk with conservative assumptions to investigate the margin between multi-unit risk and QHO, and the other was to identify the effect of time delays in releases between NPP units on the same site. Through these two kinds of assessments, we aimed at investigating the level of multi-unit risk and understanding the characteristics of risk in a multiunit context.