• 대한공업교육학회지
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• v.38 no.2
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• pp.240-266
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• 2013

The purpose of this study is to investigate the self-directed learning readiness of university students' majored in science and engineering as life-long learners, and to analyze the relationship between self-directed learning readiness and learning style. Participants of this study are 142 students majored science and engineering in H university of Chung-nam province to participate in taking self-directed learning readiness tests and Kolb's learning style tests. The results of this study are as follows: First, the average of overall participants' self-directed learning readiness is 3.41, which is possibly regarded as 'an average' according to Guglielmino & Guglielmino (1991)'s interpretation of scores. Second, among four basic scales of participants' learning styles, the highest is found in Active Experiment (AE), the lowest is found in Abstract Conceptualization (AC). In addition, the highest thing of the four learning styles found among the participants is divergers (36.6%) and the lowest is convergers (13.4%). Finally, this study compares the high-level and low-level groups of self-directed learning readiness score with learning style. there is a statistically significant correlation between the score of self-directed learning readiness and CE, AC (p=.01). Therefore, self-directed learning readiness is related to learning style.

• Journal of the Korean Magnetics Society
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• v.17 no.3
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• pp.114-119
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• 2007

The single crystal $Nd_3Se_4$ with the $bcc-Th_3P_4$ type structure is grown and the temperature dependent magnetic susceptibilities are measured between 4 K and 300 K. The experimental data are compared with the theoretically calculated susceptibilities which depend on the splitting energies of the $Nd^{3+}$ ground state under the crystal field effect. We find that the magnetic susceptibility of the $Nd^{3+}$ ion in $Nd_3Se_4$ is not affected by the crystal field effect. The spontaneous magnetization curve below $T_c\;=\;53\;K$ of $Nd_3Se_4$ corresponds to the Brillouin function of $Nd_3Se_4$ with J=9/2.

• Journal of the Korean Magnetics Society
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• v.8 no.5
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• pp.317-332
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• 1998

The adiabatic nuclear demagnetization cooling technique has reduced the lowest accessible temperature to the regime of microkelvin, and consequently led to a large expansion in microkelvin physics such as solid and liquid $^{3}He$, superconductivity of noble metals, spin glass transition, and nuclear magnetism. Our ability to reach temperature in microkelvin regime has greatly facilitated by the developments of dilution refrigerator and superconductivity magnet. It is appropriate to divide nuclear demagnetization cooling into two categories; those in which only the nuclear spin system is cooled down and those in which the lattice and conduction electrons in the refrigerant or the specimen are also cooled by the cooling power of nuclear spin system. The former cooling technique has utilized to investigate the nuclear magnetism at temperature in nanokelvin regime. The latter is widely used in studying the phenomena occurring in microkelvin regime. In this review paper, we will discuss the basic principles of nuclear demagnetization cooling and its applications. This work is supported by the Basic Science Research Institute Program under contract number BSRI-97-2404.

• Korean Journal of Child Studies
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• v.22 no.2
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• pp.375-390
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• 2001

본 연구는 혼잣말이 유아들의 인지적 과정에 중요한 역할을 한다는 비고츠키의 이론을 검증하는데 그 목적이 있다. 비고츠키의 혼잣말에 관한 이론을 확인하고자 하는 선행연구들은 일관된 결과를 보이지 못해 왔다. 이에 본 연구에서는 두 가지 과제해결조건, 즉 혼잣말을 억제하는 경우와 혼잣말을 격려하는 조건하에서 두 종류의 과제를 수행할 경우, 유아들의 혼잣말의 발생 빈도와 과제수행력은 어떠한 양상으로 나타나는지를 알아봄으로써 혼잣말의 인지적 기능을 확인하고자 한다. 30명의 5세 유아들을 대상으로 하여 이루어진 본 연구의 결과는 다음과 같았다. 유아들이 자발적으로 사용하는 혼잣말은 혼잣말이 적극 격려되는 조건일 때 그리고 언어적 과제유형보다는 공간-지각적 과제유형에서 더 높은 빈도로 관찰되었으며 높게 나타난 혼잣말은 공간-지각적 과제의 수행력에 긍정적인 영향을 보였다. 이는 비고츠키의 주장대로, 유아들의 혼잣말에 인지적 자기조절 기능이 있음을 지지하는 결과로 해석된다.

• Journal of Educational Research in Mathematics
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• v.14 no.4
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• pp.403-419
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• 2004

The perspective on this study assumes that the mathematical modeling activity provides students with the environment which promotes metacognitive thinking. The purposes of this paper are to investigate metacognitive thinking on the mathematical modeling with the result of case study. The study revealed that development of students' model was accompanied with the control and monitoring of modeling activities. Also students refined the model by self-assessment and peer-assessment in small group modeling activities and developed generalizable model.

• Korean journal of communication and information
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• v.69
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• pp.71-110
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• 2015

Beyond the technological behaviorism-oriented notion of prosumers, the current study explores the question of digital creative labour of the youth in the interrelated context of post-capitalist crisis and neoliberal ethos of selfhood. This analysis is situated particularly in the social conflicts and struggles in Korea, where the problems related to the precarization of the younger generation have been increasingly aggravated (in the realm of embodied reality) whereas their digital activities have been highly expressive (in the realm of mediated reality). The contradictions embedded in the question of the labour of the youth are delineated in the respect of the subjectivities of young free labour, or 'digital creative labour' in proposed terms: the precarious young free labour in Korea is the compound of social fragmentation, economic polarization, expansion of cognitive and emotion labour, boom of hedonistic consumerism, economic-cultural celebration of creativity and self-entrepreneurship, technological saturation of digital media, subjective/collective affects around excitement and ambition but also of anxiety and fear. The ambivalence and complexity of the young free labour is converged at the emergence of homo-economicus (Michel Foucault) through the subjectivation of the social (con)fusion of post-capitalist crisis and neoliberal governmentality of selfhood.

• Journal of the Korean Magnetics Society
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• v.2 no.1
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• pp.1-7
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• 1992

Deuterium was injected into melt-spun ribbons of ${\alpha}-Fe_{90}Zr_{10}$ using the electrolytic hydrogenation method, and the magnetic properties of these ${\alpha}-D_{x}Fe_{90}Zr_{10}$ ribbons were studied. By comparing these results with those of ${\alpha}-H_{x}Fe_{91}Zr_{9}$, the effects of phonons to magnetic properties were investigated. The Curie temperature $T_{c}$, and the spontaneous magnetizations of the $D_{47}Fe_{90}Zr_{10}$ and the $Fe_{90}Zr_{10}$ were studied using the Mbssbauer spectroscopy. From these investigations, it was found that the Curie temperature of $D_{x}Fe_{90}Zr_{10}$ was 75K higher than that of $Fe_{90}Zr_{10}$. It was believed that this indicated the importance of local deformation to the amorphous magnetism. Also by comparing the spontaneous magnetizations of $D_{47}Fe_{90}Zr_{10}$ with those of $Fe_{90}Zr_{10}$ as a function of temperature, it was found that the deuterium injection reduced the fluctuation of exchange integral.

• Journal of the Korean Society of Propulsion Engineers
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• v.20 no.2
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• pp.18-23
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• 2016

Self-assembly of organic molecules is formed spontaneously on surfaces by electrostatic interaction with substrate. This research has shown that the self-assembly improves safety and handling tractability of high-energetic materials (HEMs). According to the recent study, control of the specific crystal size for reducing the internal defects is mightily important, because the internal defects are a factor in unstability of HEMs. In turn, we performed self-assembly of organic molecules and HEMs by using nano-sized HEMs, which were produced by drowing-out or milling/crystallization. Surface modification efficiency was decided by size distribution, zeta-potential, friction sensitivity and electrostatic charge.

• Journal of the Microelectronics and Packaging Society
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• v.30 no.2
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• pp.13-20
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• 2023

The process of microelectromechanical system (MEMS) fabrication involves surface treatment to impart functionality to the device. Such surface treatment method is the self-assembled monolayer (SAM) technique, which modifies and functionalizes the surface of MEMS components with organic molecule monolayer, possessing a precisely controllable strength that depends on immersion time and solution concentration. These monolayers spontaneously adsorb on polymeric substrates or metal/ceramic components offering high precision at the nanoscale and modifying surface properties. SAM technology has been utilized in various fields, such as tribological property control, mass-production lithography, and ultrasensitive organic/biomolecular sensor applications. This paper provides an overview of the development and application of SAM technology in various fields.

• Journal of Gifted/Talented Education
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• v.25 no.6
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• pp.905-926
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• 2015

This study examined differences among high, medium, and low achievers' motivation, self-regulation strategy, and learning style in an online gifted program. The sample included 788 middle and high school students who participated in the 3-months online gifted program. Participants volunteerly completed 60 questions on their motivation, self-regulation strategy use, and learning style. Multivariate analysis of variance(MANOVA) was conducted for data analysis using SPSS 19.0. The results of this study showed that (1) as levels of students' achievement increased, levels of intrinsic motivation increased as well; (2) statistically significant differences also existed on the levels of elaboration strategy, effort management, and time management strategy use among three levels of achievement and (3) no significant differences in students' learning style preference were found between competitive or cooperative learning style. To sum up, high achieving students' levels of intrinsic motivation, elaboration strategy, effort management strategy, and time management strategy use were the highest compared to medium and low achieving students.