• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2007년도 7th International Meeting on Information Display 제7권2호
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• pp.1636-1638
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• 2007

We report on low-voltage pentacene TFTs with a Al2O3/OTS as a gate dielectric. Improving device characteristics, we performed chemical modification of self-grown Al2O3 surface with an octadecyltrichlorosilane(OTS) self-assembled monolayer(SAM). As the result of this combination, the mobility was improved from 0.3 to $0.45\;cm^2/Vs$. In addition, we examined that the SAM dipole electric field have an influence on gate leakage current, transfer and output characteristics.

• 한국융합학회논문지
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• 제8권7호
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• pp.75-84
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• 2017

이 연구는 철도신호분야 현장근무자를 대상으로 자기효능감 세부영역과 피로 세부영역 간의 융합적 관계를 구조방정식 모형을 통해 규명하고자 하였다. 일반적 자기효능감, 사회적 자기효능감은 각각 신체적 피로와 정신적 피로에 부(-)의 영향을 미칠 것이라는 가정하였다. 철도 신호분야 현장 근무자들을 대상으로 자기기입식 설문을 실시하여 최종 341건에 대해 분석을 실시하였다. 연구결과, 일반적 자기효능감은 신체적 피로와 정신적 피로에 각각 부(-)의 영향을 미친 반면, 사회적 자기효능감은 신체적 피로와 정신적 피로에 영향을 미치지 않는 것으로 확인되었다. 따라서 일반적 자기효능감을 높이기 위한 회사차원의 지원을 강화한다면 연구대상자들의 피로를 감소시키는데 효과적일 것이다.

• 디지털융복합연구
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• 제17권7호
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• pp.207-214
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• 2019

본 연구는 SimPad를 이용한 현장중심형 심폐소생술과 영상자가학습 심폐소생술의 질을 비교 분석하여 효과적인 심폐소생술 교육방법을 모색하고, 심폐소생술 교육의 기초자료로 제공하고자 시행하였다. 연구의 대상자 및 자료수집은 G광역시에 위치해 있는 G대학교의 심폐소생술 강의를 이수한 응급구조과 1학년 64명을 대상으로 2018년 11월 14일부터 2018년 12월 5일까지 시행하였으며, SPSS ver. 23.0을 이용하여 분석하였다. 연구결과, 현장중심형 심폐소생술이 영상자가학습 심폐소생술보다 CPR 총 점수, 압박점수, 압박깊이, 가슴압박율, 압박속도, 인공호흡점수, 총 호흡수 영역에서 심폐소생술 질이 더 높게 나타났다. 따라서 현장중심형 심폐소생술을 이용하여 교육법이 기존의 영상자가학습 심폐소생술 교육법보다 심폐소생술 질을 향상시키는 것으로 파악할 수 있었으며 향후 심폐소생술 교육의 기초자료로 활용할 수 있을 것으로 사료된다.

• 한국과학교육학회지
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• 제19권3호
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• pp.471-478
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• 1999

In this study, the relationships among learners' cognitive variables, motivational variables, and conceptual understandings in learning with analogy were investigated. The instruments regarding analogical reasoning ability, field dependence-independence, mental capacity, and logical thinking ability were administered. Some subtests (self-efficacy, expectancy, self-concept of ability, and value) of the Patterns of Adaptive Learning Survey were administered. After students learned with a worksheet that included analogy, a conception test regarding 'stoichiometry that included limiting reagent' was also administered. It was found that learners' conceptual understandings were significantly correlated with the logical thinking ability and the field dependence-independence among the cognitive variables, and the self-efficacy and the self-concept of ability among the motivational variables. The multiple regression analysis of the cognitive variables on conceptual understandings revealed that the logical thinking ability was the most significant predictor. The field dependence-independence also had predictive power. In the analysis of the motivational variables, the self concept of ability was the only significant predictor.

• 디지털융복합연구
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• 제15권6호
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• pp.273-282
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• 2017

본 연구는 보건의료분야 대학생들의 메타인지와 학습몰입의 관계에서 자기효능감의 매개효과를 규명하기 위하여 시행되었다. 연구대상은 간호학과와 보건행정학과에 재학 중인 300명의 학생이었으며, 2016년 11월 23일부터 12월 2일까지 자기기입식 설문지를 통하여 자료를 수집하였다. 수집된 자료는 SPSS/WIN 23.0 프로그램을 이용하여 평균과 표준편차, t-test, ANOVA, Pearson correlation coefficients, hierarchical regression analysis로 분석하였다. 연구결과 메타인지는 학습몰입에 긍정적인 영향을 주는 것으로 나타났으며(${\beta}=.678$, p<.001), 메타인지와 학습몰입의 관계에서 자기효능감이 부분 매개하는 것으로 나타났다. 이러한 결과는 보건의료분야 대학생의 학습몰입에 메타인지가 매우 중요하며, 이 관계에서 자기효능감이 영향을 미친다는 것을 의미한다. 본 연구에서 보건의료분야 대학생의 메타인지가 자기효능감을 매개로 하여 학습몰입에 미치는 영향이 달라진다는 것을 확인하였으므로, 대학에서는 수업 시 메타인지를 높일 수 있는 다양한 교수학습 전략을 개발하여 적용할 필요가 있다.

• 한국응급구조학회지
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• 제26권3호
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• pp.93-104
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• 2022

Purpose: This study examined the correlation between satisfaction with major, academic self-efficacy, and academic persistence with the general characteristics of students in a health-related field, to determine factors that affect academic persistence. Methods: The study was conducted on third- and fourth-grade health-field students at Daejion. The questionnaire consisted of a self-report, and a URL was sent by text message to students who agreed to participate after reading the purpose and necessity of the study. Results: Major satisfaction was 4.23 on average, academic self-efficacy was 4.15, and academic continuity was 4.25. Grade and school life satisfaction were the factors correlated with a significant difference in academic persistence. Significant positive correlations were seen between satisfaction with major (r=.637, p<.001) and academic self-efficacy (r=.563, p<.001); higher major satisfaction and academic self-efficacy led to higher academic persistence. Conclusion: A more systematic management approach needs to be conducted by developing active learning participation and applying customized counseling management and support programs by grade to improve the academic self-efficacy and academic persistence of students in health-related fields.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2022년도 가을 학술논문 발표대회
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• pp.241-242
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• 2022

Recently, related studies on the application of bacterial spores to self-healing concrete have been widely reported. Using the self-healing method of bacterial spores as a kind of pro-environment, the green method is very attractive, but because the living environment of bacterial spores is relatively harsh, it is necessary to have a way to separate the living environment of bacterial spores from the harsh external environment, And release bacterial spores when needed. Therefore, capsules are widely used in self-healing concrete. To enhance the self-healing effect, the capsules need to be evenly distributed in the concrete. Furthermore, we develop a CIP-based smart capsule with controllability. We determined the magnetic force of each capsule by mixing CIP in resin, then mass-fabricating the capsules for self-healing by a microfluidic method, and by measuring the kinetic distance of the capsules containing different amounts of cip under the action of a magnetic field strength. The results show that with the increase of the amount of cip, the active distance of the capsule also increases. When the cip is 8wt%, the active distance reaches 1.75cm. We believe this research can provide momentum for the development of self-healing capsule applications.

• 대한전기학회논문지:전기기기및에너지변환시스템부문B
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• 제51권8호
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• pp.482-492
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• 2002

This paper deals with overvoltage stresses in the field circuit of synchronous machine connected to HVDC terminal. A load rejection of the HVDC may cause generator in the station to become self-excited, resulting in a severe system overvoltage. This paper shows that violent field current oscillations can be produced by resonance between the machine inductance and the terminal capacitance. As most conventional excitation system do not allow reverses current, new topology of excitation system to allow reverse current is proposed. the proposed system can limit the rate of rise of terminal voltage during conditions of self excitation. Apart from these simulations, the nature(Magnitude and frequency) of the field transient state is explained mathematically. Finally, the EMTDC program is used for the simulation studies.

• 한국초전도ㆍ저온공학회논문지
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• 제1권1호
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• pp.38-41
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• 1999

Strands composing multistage superconducting cables for AC power applications have twisted structure in each stage for lower AC loss and higher stability. So, when transport currents flow in a cable, each strand is exposed to longitudinal and azimuthal magnetic fields produced by transport current flowing in strand itself and Iongitudinal and transverse magnetic fields by transport current flowing in twisted cable. In this paper. we study the influence on self field lesses generated in second stage superconducting cable for different twist direction of filaments in a strand considering twist of strands in cables.

• 대한전기학회논문지:전기기기및에너지변환시스템부문B
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• 제53권7호
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• pp.437-443
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• 2004

In this work the AC loss measurement setup based on an iron core background magnet, not used in a conventional one, has been successfully developed. To prove its validity, a round-robin test for the same Bi-2223 tape sample among three institutes has been done. The results show that the self-field and magnetization losses from the developed setup well agree with the losses measured at two other institutes of Korea Basic Science Institute and Yokohama National University. The measured magnetization losses for parallel or perpendicular fields can be well predicted from the slab model or the strip model for a filamentary region. However the magnetization losses for longitudinal fields can be rather predicted by the slab model for a decoupled filament. The self-field losses are well explained by the Norris ellipse model.