• Journal of The Korean Association For Science Education
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• v.33 no.2
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• pp.522-537
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• 2013

This study analyzed the relationship among the construct level of analogical reasoning, prediction and uncertainty, and the construction of an explanatory model that were produced during small group discussions for scientific problem solving. This study was participated in by 8 students of K University divided into 2 teams conducting scientific problem solving. The participants took part in discussions in groups after achieving scientific problem solving individually. Through individual interviews afterwards, changes in their thinking through discussion activities were looked into. The results are as follows: The analogy at the Entities/Attributes level was used to make people clearly understand the characteristics of certain objects or entities in the discussions. The analogy at the Configuration/Motion level that was produced during the discussions ensured other participants to predict the results of problem solving. The analogy at the Mechanism/Causation level changed the structure of problem situations either to help other participants to reconstruct the explanatory model or to come up with a new situation that was never been through before to justify the created mechanism and through this, the case of creating Thought Experiments during the discussions were observed. if looking into the changes of analogies, each individual's analogic paradigm during the discussions were shown as production paradigm, reception-production paradigm, production-reception paradigm, and reception paradigm. The construction and reconstruction of the explanatory model were shown in analogic production paradigm, and in the reception paradigm of an analogy, participants changed their predictions or their certainty.

• (The) Research of the performance art and culture
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• no.37
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• pp.365-389
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• 2018

This research aims to study Michael Chekhov's acting techniques scientifically, because his techniques has been studied only theoretically or empirically. Especially, this study focuses on 'imagination' and 'Psychological Gesture' from the perspective of cognitive psychology. Chekhov thought 'imagination' as the basis and core of all the works of acting. In cognitive psychology, it is called as 'imagery' and means 'a representation of the mind of the object not communicated by the sensory organs currently'. This study starts with defining imagery and takes a brief look at the features and kinds of imagery. Then the researcher will prove scientifically the possibility of training acting using imagery as Chekhov's assertion. For the proof of the validity of imagery, we'll look for the theoretical evidences-functional equivalence hypothesis, psychoneuromuscular theory, symbolic learning theory, psychophygiological information processing-and experimental ones-measurements of cerebral blood flow or event-related potential, experiments with fMRI(functional magnetic resonance imaging) or PET(positron emission tomography). As a result, we can see that imagery is functionally identical to perception and improves fulfillment of cognitive and physical tasks. As proving physical changes can draw out psychological changes(feeling) on the medium of imagery, we can also see the validity of Psychological Gesture. From the above research, even if Chekhov developed the acting techniques only on the basis of his experience, his techniques can be thought as having scientific validity. Though insufficient, this study can be a help for actors or students as they using Chekhov's techniques.

• Journal of Life Science
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• v.29 no.5
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• pp.564-569
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• 2019

Heavy drinking disrupts the nervous system by activation of GABA receptors and inhibition of glutamate receptors, thereby preventing short-term memory formation. Degradation of cognition by alcohol induces blackouts, and it can lead to alcoholic dementia if repeated. Therefore, drugs need to be developed to prevent alcohol-induced blackout. In this study, we confirmed the effect of an ethanol extract of Cassia obtusifolia seeds (COE) on alcohol-induced memory impairment. The effects of COE and ethanol on cognitive functions mice were examined using the passive avoidance and Y-maze tests. The manner in which alcohol affects long-term potentiation (LTP) in relation to the learning and memory was confirmed by electrophysiology performed on mouse hippocampal slices. We also measured N-methyl-D-aspartate (NMDA) receptor-mediated field excitatory synapses (fEPSPs), which have a known association with cognitive impairment caused by ethanol. Ethanol caused memory impairments in passive avoidance and Y-maze tests. COE prevented these ethanol-induced memory impairments in these tests. Ethanol also blocked LTP induction in the mouse hippocampus, and COE prevented this ethanol-induced LTP deficit. Ethanol decreased NMDA receptor-mediated fEPSPs in the mouse hippocampus, and this decrease was prevented by COE. These results suggest that COE might be useful in preventing alcohol-induced neurological dysfunctions, including blackouts.

• Journal of agriculture & life science
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• v.50 no.5
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• pp.61-68
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• 2016

This study was focused to examine the effects of pre- or post-harvest Ca-chitosan treatment on the shelf-life of 'Daesung' hardy kiwifruit. In the preharvest treatment, Ca-chitosan at 200 mg/L was intensively sprayed to the fruit three times on August 20, 25, and 28 in an order whereas harvested fruits were dipped for 10 sec. at the same concentration of chitosan as the postharvest treatment. Fruits were stored at 17℃ for 9 days and 1℃ for 40 days, respectively. Soluble solid contents, titratable acidity, firmness, respiration rate, and weight loss were examined to configure the qualities of fruits during storage. The changes of fruit quality parameters occurred more rapidly in calcium-chitosan treatment compared to untreated control when fruit were stored at 17℃. Both pre- or post-harvest Ca-chitosan treatment, however, effectively decreases the weight and firmness of fruit stored at 1℃. Fruit respiration rate was also reduced, indicating the increase of shelf-life throughout ripening of the fruit.

• Analytical Science and Technology
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• v.22 no.3
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• pp.201-209
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• 2009

Four heavy metals (Pb, Cd, As, and Hg) in 38 species (total 325 samples) of oriental animality medicines were monitored by inductively coupled plasma-mass spectrometry (ICP-MS) and automatic mercury analyzer (AMA). The detected concentration range of Pb, Cd, As was presented as $0.02{\mu}gkg^{-1}$ $(D.L){\sim}11.29mgkg^{-1}$, $0.01{\mu}gkg^{-1}$ $(D.L){\sim}2.50 mgkg^{-1}$, $0.12{\mu}gkg^{-1}$ $(D.L){\sim}5.27mgkg^{-1}$, respectively. In case of Hg, it the concentration range was $0.01{\sim}77.11mgkg^{-1}$ except one sample which exceeded detection limit. In all samples of Amydae Carapax and Gallnut, it was not detected over the maximum residue limits of metals. Pb is in charge of the greatest portion of contamination in 22 species of animality medicines, and in case of Hg, 54.46% of total samples were over the maximum residue limits. Therefore, environmental levels of Pb and Hg are needed to continue the researches and the studies for tracking pollution source are required.

• Journal of Korean Elementary Science Education
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• v.27 no.1
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• pp.83-92
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• 2008

In this study, we developed elementary science education modules for facilitating students' understanding of the connected nature of Science-Technology-Society. For these modules, we particularly used news articles to make connections among science, technology, and society. We set up the development criteria as followings: connecting science-technology-society, aligning with national science curriculum, respecting students' interest, and appropriating the difficulty levels in terms and concepts. We also studied 4th grade students' perception of using these modules in science lessons. Most students perceived that using the modules in their science classes helped them link science-technology-society intimately and enhance their interest and motivation, as well as their self-esteem for studying science.

• The Science & Technology
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• v.8 no.7 s.74
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• pp.56-60
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• 1975

과학기술단체총엽합회 새마을 기술봉사단(회장 김윤기)이 추진해온 농어촌소득증대를 위한 1마을 1학기술자 기술결연 운동이 자표 140마을중 16개 마을이 결연을 마쳤고 14개 마을은 7월초에 결연이 확정되어 소기의 성과를 100% 완수하게 됐다.이들 126개 마을과 결연을 맺은 과학기술자들의 실태를 학위별로 분류해 보면 박사 24명(농박10,공박3,약박2,이박7,의박1,수의박1)석사19명 학사83명이다.그리고 현직은 대학교수직 80명,실업고등학교사 36명 기타 전문직 10명의 분포로 나타났다. 도별로 기술결연을 맺은 부락은 경기도12강원도 14,충청북도10,충청남도 10,전라북도13,전라남도25,경상북도21,경상남도19,제주도2,이다.결연자 및 마을은 다음과 닽다.

• 한국지구과학회:학술대회논문집
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• 2005.09a
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• pp.331-338
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• 2005

본 연구는 과학영재교육의 질적 수준을 제고하는 데 핵심이 되는 영재교육 담당교사를 위한 연수의 효율성을 높이기 위하여 새로운 형태의 교사의 인식수준 파악과과 신념 변화 과정을 조사하고바람직한 교사연수 모형을 개발하는 기초 자료를 수집하는데 그 목적이 있다. 따라서 서울시교육청에서 처음 시도하는 교사연수 형태인 [파견연수] 전후에 있어서 과학교사들의 신념변화 과정을 설문지와 관찰, 인터뷰를 통하여 확인하고 논의점을 찾고자 하였다. 따라서 본 연구 결과가 우리나라 과학영재교육의 질적 수준을 향상시키고 영재교육 담당교사의 전문성을 효율적으로 신장시키는 연수 프로그램의 기본 틀로 활용될 것을 기대한다. 후속 연구로는 영재교육 담당교사의 전문성을 측정하는 도구 개발과 전문성 실태 분석 및 연구 결과를 토대로 한 연수 프로그램 효과 분석 및 효율적인 과학영재교육분야의 교사연수 모형개발이 필요할 것으로 생각된다.

• Bulletin of the Korean Space Science Society
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• 2003.10a
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• pp.59-59
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• 2003

과학위성 1호는 고도 685 km 태양동기궤도에서 운용되는 소형인공위성으로 지구 그림자에 의한 주기적인 온도변화, 태양과 지구로부터의 자외선복사, 진공환경과 같은 가혹한 우주환경에서 정상적으로 임무를 수행해야 한다. 이러한 가혹한 우주환경에서 위성 각 시스템의 온도를 허용범위 내에서 조절하고 구조적인 열변형을 최소화하기 위하여 열제어 시스템이 필요하며, 위성개발과정에서 상세한 열설계 요구조건을 도출하고 반영하여 과학위성 1호의 열제어 시스템을 설계하였다. 열제어 시스템은 위성의 내\ulcorner외부에서 위성외부로부터의 열유입을 최소화하고 위성내부에서 발생한 열을 효과적으로 방출하는 역할을 한다. 열제어 시스템의 성능을 검증하기 위하여 다양한 임무와 궤도를 고려한 궤도열해석이 수행되었으며, 주기적인 온도변화와 진공환경을 모사하는 열진공시험을 통하여 예상되는 우주환경에서 위성 각 시스템의 정상동작 여부가 검증되었다. 본 연구는 과학위성 1호의 열설계 결과와 효과적인 열설계를 위한 궤도열해석 과정 그리고 위성 시스템의 신뢰성 검증을 위한 열진공시험결과를 다룬다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2014.07a
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• pp.169-170
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• 2014

본 논문에서는 초등학생에게 스크래치 프로그램을 처치하여 과학교육을 위한 컴퓨팅 사고력 도입에 관한 수업을 설계 제안하고자 한다. 과학교육의 반성에 시작된 컴퓨팅 사고력 도입을 위해 4학년 과학교육과정을 분석하였으며, 스크래치 프로그램을 처음 접하는 학생들이 쉽게 애니메이션 결과물을 도출할 수 있도록 식물의 한살이 단원을 재구성하여 적용하였다. 추후에 컴퓨팅 사고력을 바탕으로 한 스크래치 프로그램 적용이 초등학생의 창의성 함양과 과학 학습정서에 어떤 영향을 주는지에 대한 후속연구를 진행하고자 한다.