• 한국과학교육학회지
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• 제14권3호
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• pp.379-392
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• 1994

One of the historical origins of the modern science education was investigated in this paper. From the view point of the pansophistic educational philosophy which emphasized "man should teach completely all things to all mankind(Omnes, Omnia, omnino)", J.A.Comenius proposed in his book "Didactica magna"(1658) that 'physica' should be learned as one of the most important school subjects. He suggested the completion of human being as a wholeness of the universe could be achieved through the physics teaching. His ideas of science education was, however, directed not to the 'rational konwledge' about the natural world, but to the 'divine wisdom'. His main thoughts and influences on science education can be summarized as follows: 1) The human being as a God's image should know the divinely created nature, because the invisible God's existence can be sensorially recognized in the nature. 2) Physics or science should be regarded as more important objects than verbal learning in general school education. 3) The cognitive union between the words('representative' or 'das Dargestellte') and things('presentative' or 'das Dargebotene') can be achieved through the objects lesson ('Anschauungsunterricht') 4) The realistic and sensor-cognitive learning theory of the object lesson is yet very important especially in the science education of elementary school, even though the inquiry learning process has became more important in the last years. 5) The religious aspect of his idea could not satisfy the social needs of industrialization and the development of professonal technics in the 18 to 19th century.

• 대한전기학회논문지:시스템및제어부문D
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• 제51권1호
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• pp.32-38
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• 2002

This paper describes a development of a portable physical activity monitoring system using two accelerometers to quantify physical activity. The system hardware consists of two piezoresistive accelerometers, amplifiers with gain of 30, lowpass filters with cut-off frequency of 15Hz, offset control circuits, one-chip microcontroller and flash memory card. In order to evaluate the performance of the system we acquired 3 channel data at 32 sample/sec from body-fixed accelerometers in chest and right upper leg. And then the acquired data were processed by MatLab on personal computer. We tried to distinguish not only fundamental actions which are steady-state activities such as standing, sitting, and lying but also dynamic activities with walking, up a stairway, down a stairway, and running. Five subjects participated the evaluation process which compare the video data with the measured data. As a result, the activity classification rate of 90.6% on average was obtained. Overall results showed that the steady-state activities could be classified from the low component of 3-axis acceleration signal and dynamic activities could be distinguished from frequency analysis using wavelet transform and FFT. Finally, we could find that this system can be applied to acquire and analyze the static and dynamic physical activity data.

• 수산해양교육연구
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• 제26권4호
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• pp.677-685
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• 2014

Motivation of participants in this study were marine sports movement through the emotional impact of these participants can continue to take advantage of marine sports, and at the same time looking for ways to stabilize participants' emotions and mental exercise to find ways to enable identifying emotions purpose is to provide basic information. In order to achieve these objectives May to October 2013 review of research results obtained are as follows. First, marine sports participation motivation of the participants involved in the relationship between emotion and motivation exercise fun, and when the external, physica l health, social, physical condition, emotional fulfillment and exercise all the sub-factors and the significant positive correlation with that of thes howed, nomotivation and vitality are significant negative relationship with, respectively. Second, the participant's participation in marine sports exercise emotional impact on motivation Motivation is a fun look at the impact on the results of this condition, fulfillment, health and physical fitness showed the vitality of the social, achievement, condition, pleasure, respectively. And when the external purification, social, achievement, health and physical fitness showed as, fulfilling the condition, social, health and physical fitness, a sense of accomplishment as appeared, pride of accomplishment, social, physical condition, pleasure, showing off the external influence.

• Journal of Theoretical and Applied Mechanics
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• 제2권1호
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• pp.51-70
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• 1996

This study is generalization of the study of Miles[Physica 11D, 1984, pp.309-323]on the resonant motion of a spherical pendulum, which is equivalent to a particle on a spherical container subject to a linear, horizontal excitation. This study covers an arbitrary shape of container and a more general excitation (horizontal but elliptic motion). The averaging method is applied to reduce the governing equations to an autonomous system with cubic nonlinear terms, under the assumption of small amplitude of the container motion. It is shown that both the container shape and the excitation pattern affect the particle dynamics. Under the linear excitation, the anharmonic motion of the particle is possible only for a certain finite range of the parameter a controling the container shape. Stability of the particle's harmonic motion is also influenced by the excitation pattern; as the excitation trajectory becomes closer to a circle, the particle's motion has a stronger tendency to become stable and to follow the rotational direction of the excitation. Under a circular excitation, the motion is always stable and circular with the same rotational direction as the excitation. Analogy between the present model and that of the surface wave inside a circular is studied quantitatively.

• 융합보안논문지
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• 제18권2호
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• pp.141-148
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• 2018

군인에게 있어 체력은 전투력의 근간으로 투철한 군인정신과 전투기술의 전제조건이라 말할 수 있으며 이는 규칙적인 신체활동과 단련을 통하여 유지 증진 시킬 수 있는 것이다. 강인한 체력을 목적으로 부사관과 학생들에게 체력단련 프로그램을 단계적 학습모형 수업을 통해 체력향상이 되었는지가 학생들에게 체력단련 프로그램을 단계적학습모형 수업을 통해 체력향상이 되었는지가 본연구의 핵심이며 전국의 부사관과 체력단련 수업에 체력단련 프로그램 단계적 학습모형을 활용한 수업방법을 군사체육 담당교수에게 자료를 제공하여 군간부를 준비하는 학생들에게 체력향상에 도움이 될것으로 기대가 된다.

• Macromolecular Research
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• 제8권1호
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• pp.44-52
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• 2000

Styrenic macromonomers with/without a silyloxy-functional group were synthesizedvia chain-end functionalization using 4-vinylbenzyl chloride as a terminating agent insec-butyllithium-initiated polymerization of styrene. The yields were 92 mol% for the silyloxy group and 88 mol% for the styrenic unit. Crystalline polystyrene-g-amorphous polystyrenes were synthesized by (η$^{5}$ -indenyl)-trichlorotitanium ((Ind)TiCl$_3$)-catalyzed copolymerizations of the macromonomers with styrene in the presence of methyl-aluminoxane (MAO) in toluene at 4$0^{\circ}C$. The macromonomer having $\alpha$, $\alpha$'-bis (4-[tert-butyldimethylsilyl-oxy]phenyl) group was also utilized for the preparation of a precursor of hydroxyl-functionalized syndio-tactic polystyrene. The obtained polymers were characterized by a combination of$^1$H, $^{13}$ C NMR spectroscopic, size exclusion chromatographic, and differential scanning calorimetric analysis. The (Ind)TiCl$_3$-catalyzed copolymerization of styrene with the macromonomer carrying the silyloxy functional group was found to be an efficient method to modify syndiotactic polystyrene without a great loss of physica] property by controlling the feud ratio of the macromonomer.

• 보건행정학회지
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• 제10권3호
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• pp.88-107
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• 2000

The Alcoholics Anonymous(AA) program has been known to be effective in many countries in helping alcoholics to stop drinking and to change their attitudes, beliefs, and behaviors. In this study, we examined AA activities among Korean AA members and measured the self-evaluated physical, social, and mental changes following the entry into the AA program. Out of identified 300 AA members who were attending 18 different AA group meetings at the time of the survey, 207 completed the self-administered questionnaire(response rate of 69.0%). T-test and ANOVA were used to compare the scores of physica(4-items), social(4-items), and menta(10-items) changes according to the level of AA activities. The proportion of the respondents who practiced the 11th step (meditation) or the 12th step (take alcoholics to a meeting after carrying messages) on the regular basis was 66.6% and 37.2%, respectively. The average time spent in meditation per week was $4.8{\pm}5.47$ hours. The length of participation in AA meetings has significantly positive impact on the average score of changes in all the 3 health states; physical(p<.01), social(p<.05), and mental states(p<.01). Also, practicing the 11th step was significantly associated with improvement of social(p<.01) and mental(p<.05), while practicing the 12th step improved only mental states(p<.01). Our findings demonstrated that not only the length of participation in AA meetings but also the practice of regular meditation(11th step) and taking alcoholics to an AA meeting after carrying messages(12th step) are very important for AA members, and lead to great positive changes in physical, social, and mental states following entry into the AA program.

• 한국응용과학기술학회지
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• 제38권3호
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• pp.786-800
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• 2021

본 연구는 서울·경기 소재 65세 이상 노인 463명을 대상으로 신체활동 참여에 따른 체력요인과 인지기능, 일상생활수행능력, 도구적 일상생활수행능력 및 심리적 변인에 대한 차이를 분석하였다. 수집 된 자료는 SPSS 25.0 통계프로그램을 이용하여 빈도분석, 신뢰도 분석, 독립 t-검증과 일원분산분석 그리고 피어슨의 상관관계분석을 실시하였으며 모든 통계적 유의수준은 p<.05로 설정하였다. 그 결과 첫째, 노인의 신체활동 참여유무에 따라 체력, 인지기능, 일상생활수행능력, 도구적일상생활수행능력 및 심리적 변인인 우울과 삶의 질에 통계적으로 유의한 차이가 나타났으며, 신체활동에 참여하는 노인의 참여빈도에 따라 체력, 인지기능, ADL, IADL, 우울 및 삶의 질에 통계적 유의한 차이가 나타났다. 신체활동에 참여하는 노인의 참여시간에 따라 체력에서 통계적 유의한 차이가 나타났다. 둘째, 체력과 인지기능, ADL, IADL, 우울 및 삶의 질의 상관관계를 살펴본 결과 대부분의 요인에서 상관관계가 나타났다. 이러한 연구결과를 바탕으로 노인의 성공적인 노화와 자립적인 노후생활을 위해 신체활동을 포함한 체계적인 중재 전략의 개발이 필요하다.

• 한국자원식물학회지
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• 제34권1호
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• pp.103-113
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• 2021

본 연구는 무등산국립공원 담양권역의 전체 식물상 및 특기 할만한 식물의 분포를 파악하고 생태계교란 야생식물의 유입요인 및 관리방안을 모색해보기 위해 수행되었다. 조사는 2019년 5월부터 2020년 10월까지 총 8차례에 걸쳐 실시되었다. 무등산국립공원 담양권역의 식물상은 107과 349속 531종 57변종 5아종 10품종 총 603 분류군이 분포하는 것으로 확인하였다. 이는 우리나라 관속식물 총 4,881 분류군의 약 12.33%로 나타났다. 무등산국립공원 담양권역에서 출현한 희귀식물은 총 15 분류군이 관찰되었다. 멸종위기종(CR)은 목련, 위기종(EN)은 댕강나무 등이 출현하였다. 취약종(VU)은 개박하, 나도옥잠화, 땅나리 그리고 주목이 관찰되었다. 무등산국립공원 담양권역의 식물구계학적 특정식물은 50과 73속 81종 3변종 1아종으로 총 85 분류군이 출현하였다. V등급은 승마 등 3분류군, IV등급은 선주름잎, 고로쇠나무, 털조장나무 등 5분류군, III등급은 청시닥나무, 산황나무 등이 관찰되었고, 특산식물은 노각나무, 닥나무, 각시서덜취, 백운산원추리, 병꽃나무, 검팽나무, 진범 등 총 13 분류군으로 파악되었다. 무등산국립공원 담양권역에서 출현한 귀화식물은 미국자리공, 방가지똥 등 16과 36속 45종 총 45 분류군으로 관찰되었고, 귀화율은 7.46%로 나타났으며, 도시화지수는 14.01%로 계산되었다. 생태계교란 야생식물은 돼지풀, 애기수영, 도깨비가지, 및 양미역취 총 4 분류군이 관찰되었다. 신선대억새평전에 생육하는 생태계교란 야생식물인 애기수영에 대한 장기적인 모니터링이 요구되고, 특히 물리적이고 생물학적인 방제가 지속되어야 할 것이다.