• 한국전문물리치료학회지
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• 제23권4호
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• pp.47-54
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• 2016

Background: Losing balance during locomotive actions becomes an increasing threat to both the community-dwelling elderly and elderly with Parkinson disease (PD). Those with PD may be at a high risk of fall due to particular characteristics during the turn. Turning around during locomotive actions may be one of problematic factors causing losing balance. Objects: This study is part of a larger study, which in part aims to identify turning strategies, to compare the strategies in the elderly with and without idiopathic PD aged 51 years and older and to distinguish whether the turning strategies can predict the elderly at risk of falls. Methods: A total of 22 community-dwelling elderlies (10 elderlies with idiopathic PD and 12 healthy elderlies) were investigated for the turning strategies during the timed up and go test. Results: There were some significant differences between the two groups during turning (p<.05). The idiopathic PD group had a tendency of challenging on taking more number of steps, more time to accomplish and staggering more for the turn relative to the control group. Conclusion: Taking more number of steps and more time to turn may be useful for distinguishing the characteristics of PD from that of the healthy elderly in turning strategy.

• Asian Journal for Public Opinion Research
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• 제1권4호
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• pp.268-291
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• 2014

Social media is becoming more and more important in social movements. This study, adopting the web mining approach, attempts to investigate how social media, Facebook in particular, functioned in the "May 25 Protest" and the "May 27 Protest", two movements which broke out in Macao on 25 and 27 May 2014, respectively, against the Retirement Package Bill. In the two protests, Macao residents deployed Facebook to share information and motivated people's participation. Twelve events (181,106 people invited) and 36 groups/pages (41,266 members) related on Facebook were examined. Results showed that the information flow on Facebook fluctuated in accordance with the event development in reality. Multiple patterns of manifestation, such as video of adopted news or songs, designed profile (protest icon), original ironic pictures, self-organized clubs by undergraduates and white T-shirts as a symbol, among others, appeared online and interacted with offline actions. It was also found that social media assisted the information diffusion and provided persuasive reasons for netizens to join the movement. Social media helped to expand movement influence in providing a platform for diversified performances for actions taken in a protest, which could express and develop core and consistent movement repertoire.

• 대한수학회보
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• 제52권2호
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• pp.557-570
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• 2015

Let $\mathbb{G}$ be a von Neumann algebraic locally compact quantum group, in the sense of Kustermans and Vaes. In this paper, as a consequence of a notion of amenability for actions of Lau algebras, we show that $\hat{\mathbb{G}}$, the dual of $\mathbb{G}$, is co-amenable if and only if there is a state $m{\in}L^{\infty}(\hat{\mathbb{G}})^*$ which is invariant under a left module action of $L^1(\mathbb{G})$ on $L^{\infty}(\hat{\mathbb{G}})^*$. This is the quantum group version of a result by Stokke [17]. We also characterize amenable action of Lau algebras by several properties such as fixed point property. This yields in particular, a fixed point characterization of amenable groups and H-amenable representation of groups.

• 충청수학회지
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• 제33권1호
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• pp.113-132
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• 2020

We show that if a finite group G acts freely with homotopically trivial translations on a 3-dimensional nilmanifold 𝓝_p with the first homology ℤ² ⊕ ℤ_p, then either G is cyclic or there exist finite nonabelian groups acting freely on 𝓝_p which yield orbit manifolds homeomorphic to 𝓝/𝜋₃ or 𝓝/𝜋₄.

• 한국과학교육학회지
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• 제30권6호
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• pp.799-814
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• 2010

본 연구의 목적은 화석 전시에 관한 깊이 있는 이해와 추론적인 사고를 유도하는 질문으로 구성된 도구를 개발하고 이를 활용한 관람과 그렇지 않은 자유관람 사이의 소통의 특징을 행위 단위 및 대화 유형으로 비교하는 것이다. 몇 단계의 개발과정을 거쳐, 최종적으로 포괄적이면서 추론적 흐름을 가진 아홉 개의 질문으로 구성된 질문카드세트를 개발하였다. 질문카드의 활용에 따른 소통의 특징을 알아보기 위해, 국립과천과학관 자연사전시관에서 자료를 수집하였다. 연구참여자는 또래 관람객 총 열 여덟(18) 그룹(초등학교 5학년에서 중학교 3학년까지)이며, 이들의 관람을 비디오로 녹화하고 전사하여 분석하였다. 전반적인 관람 행태로서 관람 소요 시간(holding time)과 관람 행위(action)를 측정하였는데, 이 중 관람 행위는 크게 '보기(look)', '말하기(speech)', '행동하기 (motion)'로 나누고, 각각 세부적인 요소들로 더 자세히 구분하여 발생빈도를 분석하였다. 또한 말하기 관련 세부 요소들을 바탕으로 하여 대화 유형(type of conversation)을 구분하여 분석하는데, 크게 '열거 (enumerative),' '합의(consensual),' '응답 (responsive),' '논의(argumentative)'로 나누고, 각각의 빈도를 분석하였다. 분석 결과. 질문카드를 활용하는 관람에서는 자유관람보다, 전시물 별 관람 소요 시간 및 대부분의 관람 행위들이 유의미하게 증가하였다. 또한 전반적인 대화의 빈도도 증가하였는데, 특히 '응답'을 제외한 나머지 대화의 유형은 모두 유의미하게 증가하였다. 결론적으로, 질문카드는 전시 물-관람객 간 또는 관람객-관람객 간 소통을 활발히하고, 관람객의 추론적 사고 활동을 촉진하며, 관람객에게 무엇을 어떻게 보아야 하는지에 대해 안내함으로써 보다 집중력 있고 의미 있는 관람이 가능하도록하였다.

• 동아시아식생활학회지
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• 제16권5호
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• pp.550-558
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• 2006

The study investigated the serum lipid metabolism and enzyme activities of Korean teas for their preventative activity against chronic disease and obesity. Male Sprague-Dawley rats were raised for 8 weeks on four experimental diets: normal diet, hyperlipidemic diet, and hyperlipidemic diet to which green and black teas (2% each) were added. Various biological actions, including lipid metabolism and enzyme activities of the serum, were investigated. Diet-induced, hyperlipidemic rats fed with green and black teas, showed significant decrease in food efficiency ratio, triglyceride, total lipid, and phospholipid compared to control, i.e. the normal and diet-induced, hyperlipidemic rats. Total cholesterol, LDL-cholesterol, Al(atherogenic index), LHR, VLDL-cholesterol, ester-cholesterol, and free-cholesterol also showed a significant decrease. However, there was no significant difference between the tea-fed, diet-induced, hyperlipidemic dieted groups. HDL-cholesterol concentration was increased significantly in the tea-dieted and normal groups compared to the control. There was a little difference in lipase activity between the normal and control groups, although green and black tea-dieted experimental groups were both increased compared to the control. The contents of total lipid, triglycerides, and total cholesterol were decreased in the normal and experimental groups compared to the control. The GOT, GPT, ALP and LDH serum enzyme activities of the experimental groups were significantly reduced compared to those of the control groups.

• 대한약리학회지
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• 제17권2호
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• pp.17-22
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• 1981

Guinea-pig ileum을 naloxone을 가(加)하거나 가(加)하지 않은 전해질(電解質) 농도(濃度)가 다른 modified Krebs-Henseleit bicarbonate buffer solution에 $4^{\circ}C$에서 24시간 incubation한 다음, morphine의 수축(收縮) 억제작용(抑制作用)으 관찰(觀察)하여 다음과 같은 성적(成績)을 얻었다. 1) Incubation 자체(自體)로써 morphine의 작용(作用) 강화(强化)되었다. 2) Incubation media 내(內) 전해질(電解質) 변동(變動)은 $Na^+\;75mM$ 군(群)과 $K^+2.9mM$ 군(群)에서는 morphine의 작용(作用)이 강화(强化)되었고, $Ca^{++}\;3.6mM$ 군(群), $Mg^{++}$ free 군(群)과 $Mn^{++}\;0.2mM$ 군(群)에서는 약화(弱化)되었다. 3) Incubation media내(內) naloxone은 morphine의 작용(作用)을 강화(强化)하였다. Incubation media 내(內) naloxone을 가(加)하고 전해질(電解質)을 변동(變動)시킨 실험(實驗)에서 $Na^+\;75mM$ 군(群), $K^+2.9mM$ 군(群)과 $Ca^{++}3.6mmM$ 군(群)에서는 naloxone에 의(依)하여 morphine 작용(作用)이 약화(弱化)되었고, $Mg^{++}$ free 군(群)과 $Mn^{++}\;0.2mM$ 군(群)에서는 강화(强化)되었다. 4) Naloxone에 대(對)한 $pA_2$치(値)는 전군(全群)에서 변동(變動)이 없었다. 5) 이상(以上) 실험성적(實驗成績)은 naloxone opiate receptor에 대(對)한 작용외(作用外)에 세포막 또는 근세포수축기구(筋細胞收縮機構)에 영향(影響)을 미처 morphine의 작용(作用)에 영향(影響)을 줄 수 있음을 시사(示唆)한다.

• 대한치과교정학회지
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• 제25권6호
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• pp.697-704
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• 1995

Chicken calvarial bone is known to contain various cell types, but their exact composition is unknown. By characterizing the chicken calvarial bone biochemically, it can be used to study biochemical, histochemical actions of bone cells in general. Calvaria of 18-day-old white leg horn embryo was aseptically dissected and bone cell populations were isolated by sequential enzymatic digestion. Histochemical study for osteoclast-like bone cell. population was performed with tartrate resistant acid phosphatase(TRAP) stain and for osteoblast-like bone cell population, alkaline phosphatase(ALP) stain was performed. Biochemical study for osteoblast-like bone cell population was performed using alkaline phosphatase(ALP) assay. Following conclusions were obtained from this study. 1. TRAP positive multi and mononuclear cells were mostly observed in group I and II, indicating that osteoclast-like bone cell population is mostly found in these groups. 2. All the cultured groups showed almost equal ALP activities and were positive for ALP stain, indicating that osteoblast-like bone cell population is evenly dispersed in all culture groups. 3. Experimental group treated with $1,25(OH)_{2}D_3$ showed increase in ALP activity in contrast to the control group, confirming previous studies that $1,25(OH)_{2}D_3$ increases ALP activities in in vitro bone cultures. 4. Results from von Kossa's stain indicated that in vitro bone formation had occured after 3 weeks of culture with beta-glycero phosphate.

• 신재생에너지
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• 제20권1호
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• pp.145-174
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• 2024

Addressing climate change necessitates evidence-based policies grounded in science. The use of forest biomass for energy production is based on a broad scientific consensus at the international level. However, some environmental groups in South Korea are opposing this system of energy production. Through this study, the authors aim to reduce unnecessary confusion and foster an atmosphere conducive to meaningful evidence-based policies. We have classified the issue into eight categories: biological carbon cycle, carbon debt, nature-based solutions, air emissions, cascading principles and sustainability certification, forest environmental impacts, climate change litigation, and the behavior of environmental groups and public perception. Consequently, the following key points were derived: (1) the actions of some environmental groups seem to follow a similar pattern to denialist behavior that denies climate change and climate science; (2) the quality of evidence for campaigns that oppose the use of forest biomass for energy production is low, with a tendency to overgeneralize information, high uncertainty, and difficulty in finding new claims.; (3) most of the public believes that forest biomass energy is necessary, and the governments of major countries are aware of its importance. Significantly, Forest biomass for energy is based on an overwhelming level of scientific consensus recognized internationally.

• 한국환경교육학회지:환경교육
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• 제6권1호
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• pp.63-99
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• 1994

The international environmental activities and environmental education began in 1970's. Environmental education in Korea was emphasized since the Forth National Curriculum. 'The Environmental Education Curriculum' will be separated as one of the most important parts in the Sixth National Education Curriculum in Korea. The purpose of this study was development. of 'Environmental Science' of high school appropriate to Sixth National Education Curriculum. First step was to state goals of environmental education in detail based on analysis of goals about environmental education in our country and other countries. Second was to analyse seven environments-related texts of Korea, America and England. Third, to measure how much environmental education has achieved in Fifth National Curriculum of Korea. Fourth, to develop a new environmental text of high school level. Fifth, to verify the effect of developed environmental text. The environmental part of 'Science I'(unit V. Life and Environments) and high school environments-related reference text(Survival and Environments) in Korea, American knowledges. American 'Environments' was stressed in many skills but they didn't include various teaching strategies. On the other hand, American 'Science-Technology-Society(S-T-S)' and British 'Science and Technology in Society(SATIS)' were stressed in knowledges and skills, and they included many teaching strategies and student actions. American 'S-T-S' was the only one stressed in values and attitudes. And all seven texts were not interested in behaviors and participations. To measure the achievement of environmental education by questionnaire, 497 high school students in total were selected from five different schools. Actually, most students had a positive thinkings and attitudes in their hearts about environmental problems, about environmental problems, but many of them did not take actions to solve environmental problems and to protect environments. The higher the score students got in 'knowledges and informations', the higher the score in 'skill'. It implies that learning of skills is based on learning of knowledges and informations about environments. On the other hand, much knowledges and information about environments has not always ensured positive thinkings and attitudes or active behaviors and participations to solve environmental problem. In view that ultimate aim of environmental education is forming responsible environmental behaviors and the goals of values and behaviors are as important as knowledges and skills. A new environmental text of high school level was developed and it was based on analysis of seven texts and environmental education in Fifth Korean Curriculum. This text have seven units, 1. Habitates : What're the meanings?, 2. Nuclear Energy : Can't be Avoid?, 3. Acid Rain : What're the Messages?, 4. Ethanol : Is this Future Fuel?, 5. Wastes : A New War!, 6. What're the National and Gloval Environmental education and avoided from the array of knowledges. Therefore included various teaching strategies and independent actions of students. 'Open-ended value learning' and 'free behavior learning' in text were special learning parts for aquisition of values and formation of behaviors. To verify the effects. of new developed environmental text, the direct learning was carried out by 286 students in total. Post test scores of experimental groups per each units were significantly higher than those of control groups from five different schools were as follows. For validity of selecting contents for units, 74% of respondent replied positively. For classification and presentation of four goal-groups, 90% replied positively in validity and 82%, in utility. For validity of various teaching strategies, 88% and for the degree of including student-centered independent actions, 86% replied positively, For importances and expected effects of 'open=ended value learning' and 'free behavior learning', showed positive responses respectively, 88%, 92% Therefore this text is effective to achieve four goals of environmental education equally.