광원의 종류에 따른 복합레진의 중합거동 및 중합률에 관한 연구

류주희,이인복,유현미,김미자,석창인,권혁춘 大韓齒科保存學會 2004 Restorative Dentistry & Endodontics Vol.29 No.4

Objectives: The purpose of this study was to observe the reaction kinetics and the degree of polymerization of composite resins when cured by different light sources and to evaluate the effectiveness of the blue Light Emitting Diode Light Curing Units (LED LCUs) compared with conventional halogen LGUs. Materials and Methods: First, thermal analysis was performed by a differential scanning calorimeter(DSC). The LED LCU (Elipar Freelight, 320㎽/㎠) and the conventional halogen LCU (XL3000, 400㎽/㎠) were used in this study for curing three composite resins (SureFil, Z-250 and AEliteFLO). Second, the degree of conversion was obtained in the composite resins cured according to the above curing mode with a FTIR. Third, the measurements of depth of cure were carried out in accordance with ISO 4049 standards. Statistical analysis was performed by two-way ANOVA test at 95% levels of confidence and Duncan's procedure for multiple comparisons. Results: The heat of cure was not statistically different among the LCUs (p > 0.05). The composites cured by the LED (Exp) LCUs were statistically more slowly polymerized than by the halogen LCU and the LED (Std) LCU (p< 0.05). The composite resin groups cured by the LED (Exp) LGUs had significantly greater degree of conversion value than by the halogen LCU and the LED (Std) LCU (p = 0.0002). The composite resin groups cured by the LED (Std) LGUs showed significantly greater depth of cure value than by the halogen LCU and the LED (Exp) LGU (p < 0.05).

뼈에 발생한 악성 림프종 환자의 치료 효과 판정에서 ^(18)F-FDG Positron Emission Tomography의 유용성

김남돈,박연희,기승석,박용진,김형준,류백렬,김흥태,김성은,천기정,최창운,임상무 대한핵의학회 2003 핵의학 분자영상 Vol.37 No.5

원발성골림프종은 매우 드문 질환이기는 하나, 복합항암요법이나 방사선 치료등에 높은 반응율을 보이며, 좋은 예후를 가지는 림프절의 비호지킨 림프종의 일종이다. 그러나, 치료 효과 판정에 있어 골병변의 특이성에 의한 모호한 방사선학적 특징으로 어려움이 있어 왔다. 본 증례는 위와 같은 원발성골림프종 환자에서 PET 스캔을 사용하여 민감하게 완전 반응을 평가할 수 있었던 예로, 앞으로 다른 고식적인 방법과 함께 이 질환의 진단과 치료 평가 있어 유용하게 사용 될 수 있을 것으로 전망할 수 있었다. Purpose: Accurate assessment of the lesion after treatment of patients with bone lymphoma is difficult. In this patient who demonstrated complete remission after chemotherapy, the regions of fluorine-18 fluorodeoxyglucose (^(18)FFDG)PET uptake diminished more rapidly following therapy, indicating a complete response at much earlier stage than did Magnetic Resonance Imaging (MRI) or CT based findings. With the conventional methods, such as MRI and CT. It was difficult to assess whether the residual tumor tissue was viable or not. Decision to complete response is very important in patients with ymphoma to plan the further treatment. We experienced a patient with primary lymphoma of bone who revealed complete response to chemotherapy on ^(18)FFDGPET while CT showed persistent destructive bone lesion. Thus, ^(18)FFDGPET study after therapy may be superior to CT in the evaluation of response to treatment in primary lymphoma of bone.

통일통합교육 방향으로서 교양교육과 직업교육에 관한 논의

류성창(Josh Sung-Chang Ryoo),안창희(Chang Hee Ahn),최슬기(Seul-Gi Choi),한수정(Shuchung Han) 통일교육학회 2018 통일교육연구 Vol.15 No.1

한반도의 통일 이후 고려해야 할 통일통합교육의 방향으로서 교양교육적 성격의 고등교육과 직업훈련 중심의 실용교육의 두 가지를 고려할 필요가 있다. 특히 해외의 여러사례에서 볼 수 있듯, 사회경제적으로 취약한 계층의 성장을 위한 교육논의에서 빠지지 않고 등장하는 것이 바로 교양교육과 대학진학을 통한 인간성의 신장인지 아니면 실질적인 직업훈련을 통한 경제력 향상인지에 대한 검토이다. 통일이 되면 지역적으로 취약한 계층이 있을 것으로 예상되는 바, 본고는 취약 지역 학생들의 사회적 지지를 위한 교육의 방향으로서 고등교육과 직업교육에 관한 논쟁을 분석한다. 특히 미국의 흑인 인권 신장을 위한 워싱턴과 두보이스 사이의 교육논쟁을 분석하고, 이러한 논쟁이 통일통합교육에 제공하는 시사점에 대하여 논의한다. In case the reunification of the Korean peninsula becomes reality, it is likely that there would be a consideration between liberal education and vocational training as the proper direction of education for establishing social equity, especially with the special consideration of the citizens from the Northern part that is known to be economically weak. The similar debate between African-American theorists, Booker T. Washington and W.E.B. Dubois, can shed an insightful light on the future possible debate in Korea. This articles draws upon the American debate and reflects on the application of such debate to the future Korean case, with the ultimate goal of achieving social equity in the reunified peninsula.

The risk of gastric cancer according to changes in smoking status among Korean men

Sung Keun Park,Min-Ho Kim,Chang-Mo Oh,Eunhee Ha,Eun Hye Yang,Woo Yeon Hwang,Ann Hee You,Jae-Hong Ryoo 한국역학회 2022 Epidemiology and Health Vol.44 No.-

OBJECTIVES Smoking is a risk factor for gastric cancer. Studies have shown that the risk of gastric cancer can vary by smoking status and smoking amount at a single point in time. However, few data have been reported about the effect of changes in smoking status over time on the risk of gastric cancer. METHODS This study collected data from the National Health Insurance Corporation in Korea on 97,700 Korean men without gastric cancer who underwent health check-ups from 2002 to 2013. The smoking status (never smoked, quit smoking, and currently smoking) of study participants was assessed in 2003-2004 and 2009, and the results were categorized into 7 groups: never-never, never-quit, never-current, quit-quit, quit-current, current-quit, and current-current. Participants were followed until 2013 to identify incident gastric cancer. A multivariate Cox proportional hazard model was used to calculate adjusted hazard ratios (HRs) and 95% confidence intervals (CIs) for incident gastric cancer according to changes in smoking status and smoking amount (pack-years). RESULTS Compared with group 1 (never-never), participants currently smoking in 2009 (never-current, quit-current, and current-current) had higher HRs for gastric cancer (never-quit: 1.077; 95% CI, 0.887 to 1.306, never-current: 1.347; 95% CI, 0.983 to1.846, quit-quit: 1.086; 95% CI, 0.863 to 1.366, quit-current: 1.538; 95% CI, 1.042 to 2.269, current-quit: 1.339; 95% CI, 1.077 to 1.666, and current-current: 1.589; 95% CI, 1.355 to 1.864, respectively). The risk for gastric cancer was highest in heavy smokers, followed by moderate smokers. CONCLUSIONS In all categories of smoking status, current smoking was associated with the highest risk of gastric cancer. Heavy smoking was associated with an increased risk of gastric cancer, even in former smokers.

Relationship between Taekwondo Uniform Selection Attributes, Brand Image, Brand Reliability, and Behavioral Intention of Taekwondo Trainees

( Hee-jung Kim ),( Chul-woo Kang ),( Yeong-chang Ryoo ) 국제태권도학회 2017 International Symposium for Taekwondo Studies Vol.2017 No.-

Purpose: As mental, educational, and social relationship formation becomes significant due to the rapid development of advanced industrial civilization, orientalism based on world mentality and personality is gaining attention recently. In particular, attention on Taekwondo, which instructs mental education and physical technique systematically, continues to increase for this reason. Moreover, Taekwondo’s brand asset and value has augmented since the transformation of awareness that this sport can be performed by all ages. The Taekwondo industry also faces fierce competition at an alarming rate due to market saturation. Thus, Taekwondo uniform companies jump into promotions by developing new products and active marketing in order to create new income structures and increase sales. This study analyzes the relation between Taekwondo uniform selective attributes, brand images, brand reliability, and behavioral intention of Taekwondo trainees and presents implications of marketing strategies for sustainable growth in this industry. Methods: This study selected Taekwondo athletes who participated in a 2017 Taekwondo national competition as samples. In addition, researchers visited them, explained the study’s purpose, distributed 300 questionnaires through convenience sampling, and received 298 back. Some (n = 11) questionnaires were excluded, because they were incomplete. Thus, 287 questionnaires were used in this study. SPSS 22.0 and AMOS 22.0 were employed for data process and analysis and frequency, confirmative factors, reliability, correlation, and structural equation model (SEM) analyses were conducted. Results: First, it was demonstrated that self-display and brand conformity were significant in influencing experiential images of Taekwondo brands, brand conformity influenced functional images and functionality, and trademark dependency affected considerably symbolic images. Second, experiential images and functional images affected brand reliability significantly among sub-factors of Taekwondo uniform brand images. Third, brand reliability had significant influence in constant purchase intention and word-of-mouth intention. Conclusions: Therefore, Taekwondo brands should provide a variety of distinct selective attributes reflecting trainees’ needs in order to build familiar and sentimental images between brands and trainees. In addition, identifying images for representing their brands by studying brand image and the identity formation and by making trainees familiar with their brands should be priorities. It is important to let customers promote voluntarily purchased brands as well as recommend and spread them to others. In this way, it is necessary to actively use bilateral communication that could induce constantly reliable relationships with customers.

A cross sectional study of imatinib plasma trough Level in patients with advanced gastrointestinal stromal tumor (초)

Chang Hoon Yoo,Min Hee Ryu,Byung Woog Kang,Shin Kyo Yoon,Baek Yeol Ryoo,Heung Moon Chang,Jae Lyun Lee,Mo Youl Beck,Tae Won Kim,Yoon Koo Kang 대한내과학회 2009 대한내과학회지 Vol.77 No.4S

교과교육론'의 내용과 교수방법의 질적 개선을 위한 종합적 연구

류완영,김명희,정진곤,김임득,장경희,노부자,신차균 한국교육과정학회 1997 교육과정연구 Vol.15 No.2

사범대학의 교육과정은 교양교육과 전공 교과교육 및 교육학, 심리학 등의 전문교육으로 구성되어 있다. 이 중 전문교육은 교사의 가장 큰 임무가 교수이고, 비교수 내용전문가와 차별화할 수 있는 유일한 요인이기 때문에 그 중요성이 매우 크다. 그러나 교사들에게 있어 교과내용과 교수방법을 결합하는 능력이 결여되어 있다는 비판이 끊임없이 제기되어 왔다. 교과교육론은 각 교과의 교육내용으로서의 지시과 이를 유용한 지식이 되도록 가르치는 방법을 통합하는 입문과목이라는 측면에서 그 중요성이 최근 크게 부각되고 있다. 그러나 이 과목의 성격이 불분명하고 다루어야 할 내용들이 미정립 상태에 있기 때문에 소기의 성과를 거두지 못하고 있으며, 과목 운영에도 많은 혼란을 놓고 있다. 이에 따라 본 연구에서는 국어과, 영어과 및 미술과 교육론에 한정하여 그 성격을 규명하고, 운영현황을 파악하였으며, 이들 세 교과교육론에서 다루어야 할 내용과 그 교수방법을 제안하였다. 연구방법으로는 문헌고찰, 연구진 협의회, 설문지, 학술세미나, 외국대학의 사례조사 등이 사용되었다. 아울러 효과적인 교과교육이 되기 위하여 교사교육의 방향이 기존의 실증주의적/공학적 지향에서 개인적/구성주의적 지향으로 바뀌어야 한다는 점, 학교 현장 방문과 교육실습의 기회를 확대해야 한다는 점, 교과교육론에서 다양한 내용과 교수방법을 다루어야 하며 아울러 연구능력을 길러야 한다는 점, 그리고 교과교육 전공교수를 많이 확보해야 한다는 점 등을 제안하였다. This paper attempts to investigate the characteristics of subject matters education, such as Korea, English and art education from the perspectives of subject matters respectively, to identify some problems resulting from how to teach with what contents in each course, and to make suggestions for desirable contents and instructional methodology. Needless to say, it is indispensable for the teacher professionalism to improve the competence by combining contents and instructional methodology. The course called "Principles of Subject Matter Education" can be defined as an introductory course to intergrate content knowledge and effective instructional methods based on the principle. In this sense, the importance of respective courses for subject matters education has been brought into relief. The status of the course, however, is still in its infancy and its characteristics are not clearly defined, because of its scanty numbers of specialists and immaturities of its academic identity. Consequently, each course tends to be taught in a totally different way, especially, in conjunction with both contents and teaching methods. To make a comprehensive study for the improvement of current situations involved in subject matter education, a variety of research methods in taken. such as reviews of literature, questionnaires, academic seminars, case studies in foreign countries and seminars of researchers for this study. The authors make several suggestions for the activation of subject matters education. Firstly, the conceptual orientation of teacher education shoould be achieved in view of constructivist approaches, especially, to produce talented manpower necessary for the information age in the 21st century. Secondly, in order to cultivate pedagogical content knowledge, "Principles of Subject Matter Education" should include instructional methodology which makes it possible to get easy access to specific contents to teach. Thirdly, the course should be made not only to make use of research findings in the field, but also to foster research abilities to experiment the contents concerned. And, finally, educational institutions should hire as many subject matter specialists as needed to perform these tasks.

A cross sectional study of imatinib plasma trough Level in patients with advanced gastrointestinal stromal tumor

Chang Hoon Yoo,Min Hee Ryu,Byung Woog Kang,Shin Kyo Yoon,Baek Yeol Ryoo,Heung Moon Chang,Jae Lyun Lee,Mo Youl Beck,Tae Won Kim,Yoon Koo Kang 대한내과학회 2009 대한내과학회 추계학술대회 Vol.2009 No.-

Systematic Review of Hominis Placenta Pharmacopuncture in English and Korean Literature

Ryoo, Dek-Woo,Kim, Hong-Guk,Kim, Sung-Jin,Baek, Seung-Won,Jeong, Seong-Mok,Yoon, Jin-Young,Lee, Chang-Hee,Goo, Bon-Hyuk,Kim, Min-Jeong,Park, Yeon-Cheol,Baek, Yong-Hyeon,Nam, Sang-Soo,Seo, Byung-Kwan Korean AcupunctureMoxibustion Medicine Society 2017 Korean Journal of Acupuncture Vol.34 No.4

Background: Hominis placenta (HP) is used in Korean medicine to tonify qi and blood, and enrich yin and tonify yang. HP has been reported to have therapeutic effects. Methods: A survey of international and Korean electronic databases was conducted using the search terms "hominis placenta pharmacopuncture" and "hominis placenta extract". The search was limited to material published up to May 31, 2017. Results: A total of 83 studies were included in this systematic review: 50 were clinical studies, 25 were basic studies, and 8 were other types of study. Among clinical studies, the most frequently treated disease groups were musculoskeletal diseases and nervous system diseases. In vitro studies were conducted mainly on anti-inflammatory, analgesic, and anti-cell necrosis models. Most of the in vivo studies were performed in rheumatoid arthritis or diabetic complications models. Conclusion: HP pharmacopuncture has effects in the treatment of various diseases. Further large-scale randomized controlled trials are needed to improve the level of evidence for HP pharmacopuncture. It would be helpful if future in vitro and in vivo studies could identify the mechanism of action of HP pharmacopuncture.

2013년 고산지역 연무, 황사, 연무 - 황사혼재 대기 에어로졸의 화학조성 특성

고희정(Hee-Jung Ko),송정민(Jung-Min Song),차주완(Joo Wan Cha),김정은(Jeongeun Kim),류상범(Sang-Boom Ryoo),강창희(Chang-Hee Kang) 한국대기환경학회 2016 한국대기환경학회지 Vol.32 No.3