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류리,정운주,김혜진,이원화,배종섭,박용복,최명숙 한국식품영양과학회 2013 Preventive Nutrition and Food Science Vol.18 No.3
Artemisia princeps Pampanini (AP) has been used as a traditional medicine in Korea, China and Japan and reported to exhibit various beneficial biological effects including anti-inflammatory, antioxidant, anti-atherogenic and lipid lowering activities; however, its antiplatelet and anticoagulant properties have not been studied. In the present study, we evaluated the effects of an ethanol extract of Artemisia princeps Pampanini (EAP) and its major flavonoids, eupatilin and jaceosidin, on platelet aggregation and coagulation. To determine the antiplatelet activity, arachidonic acid (AA)-, collagen-and ADP (adenosine diphosphate)-induced platelet aggregation were examined along with serotonin and thromboxane A2 (TXA2) generation in vitro. The anticoagulant activity was determined by monitoring the activated partial thromboplastin time (aPTT) and prothrombin time (PT) in vitro. The data showed that EAP and its major flavonoids, eupatilin and jaceosidin, significantly reduced AA-induced platelet aggregation and the generation of serotonin and TXA2, although no significant change in platelet aggregation induced by collagen and ADP was observed. Moreover, EAP significantly prolonged the PT and aPTT. The PT and/or aPTT were significantly increased in the presence of eupatilin and jaceosidin. Thus, these results suggest that EAP may have the potential to prevent or improve thrombosis by inhibiting platelet activation and blood coagulation.
초등학생의 학업적 자기조절 전략 사용 잠재프로파일분석: 자율동기의 예측력과 학업에 대한 영향력 검증
류리라(Ryu, Rira),송주연(Song, Juyeon),이우걸(Lee, Woogul) 한국교육심리학회 2021 敎育心理硏究 Vol.35 No.2
본 연구에서는 초등학교 고학년 학생들이 학업 상황에서 보이는 자기조절 전략 사용 양상을 프로파일분류를 통해 파악하고자 했다. 또, 학업적 자기조절 전략 사용 프로파일 분류에 있어 자율동기의 영향력과 프로파일에 따른 시험불안, 학업스트레스, 학업성취에 있어서의 차이를 살펴봤다. 한국교육종단연구 2013(KELS2013)에서 초등학교 6학년 학생들을 대상으로 한 자료를 활용하여 잠재프로파일분석을 실시하고, 잠재프로파일에 대한 예측변인과 결과변인을 살펴봤다. 연구 결과, 대다수의 학생들은 주요 자기조절 전략들에 대한 전반적인 활용 수준에 따라 상위집단, 평균집단, 중하위집단, 하위집단으로 분류되었고, 나머지는 다른 자기조절 전략들에 비해 유독 노력이 강조된 모습의 노력집단으로 분류되었다. 학생들의 자율동기는 전년도 학업성취를 통제한 상황에서도 자기조절 전략 사용 프로파일 분류에 있어 고유한 영향력을 가진 예측변인이었다. 상위집단의 학생들은 다른 집단 학생들에 비해 시험불안, 학업스트레스, 학업성취에 있어 적응적인 모습을 보였다. 반면 노력집단의 학생들은 학업성취에 있어서는 상위집단의 학생들과 비슷하게 높은 수준을 보였지만, 시험불안과 학업스트레스에서는 상위집단의 학생들보다 좋지 않은 모습을 보였다. 이와 같은 학생들의 학업적 자기조절 전략 사용 프로파일 분류와 각 프로파일에 속한 학생들의 특징에 대한 이해는 개개인의 학생들에게 적절한 교육적 처방을 제안하는데 큰 도움을 줄 것이다. This study sought to identify primary students’ academic self-regulatory strategy use patterns using latent profile analysis (LPA). This study also aimed to examine the relationships of academic self-regulatory strategy use profiles with autonomous motivation as a predictor and with test anxiety, academic stress, and academic achievement as outcomes. We conducted LPA using data targeting 6th-grade elementary school students collected through the Korean Educational Longitudinal Study 2013 (KELS2013). Results showed that most students were categorized into four profiles depending on the degree of overall academic self-regulatory strategy use. One more profile was identified, featuring average levels of academic self-regulatory strategy use except for high effort. Students’ autonomous motivation uniquely predicted academic self-regulatory strategy use profiles even considering past academic achievement influences. Students in the high self-regulation profile were relatively adaptive in terms of test anxiety, academic stress, and academic achievement. Students in the effortful self-regulation profile showed high academic achievement, as did the high self-regulation students. In contrast, the effortful self-regulation students showed higher test anxiety and academic stress than did the high self-regulation students. These results help us understand detailed characteristics of each academic self-regulatory strategy use profile and suggest educational prescriptions needed for learners in each profile.
친환경 건축에서의 요소기술을 통한 외피계획에 관한 기초연구-노먼 포스터(Norman Foster) 작품을 중심으로-
류리,서장후,김용성 한국디지털건축·인테리어학회 2013 한국디지털건축인테리어학회 논문집 Vol.13 No.4
As the energy consumed in building area has occupied a lot when looking into energy usage weights in area over the world, energy reduction building, eco-friendly architecture comes to the fore in the modern architecture. Discussions on the eco-friendly architecture have various concept definitions and targets to be achieved.The architectural works of Norman Foster are expressed as high-tech buildings using iron, glass, etc. in appearance, but they appear as those buildings with low energy load by analyzing environmental conditions from initial design stage that each building has, utilizing natural energy with design of outer shell and applying proper technical system. Thus, this study aims at providing basic data of outer shell planning through eco-friendly element technologies by considering pattern and outer shell design of buildings, principles of eco-friendly building plan as an eco-friendly building planning technique of Norman Foster as an example of plans to utilize building pattern, outer shell design and natural environments, in order to utilize passive measures as much as possible to increase energy saving methods and increase comfort by analyzing element technologies in the eco-friendly architecture in line with the modern flow.