• Title, Summary, Keyword: Core Reflection

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The basic theoretical research for a practice of university faculty member's teaching reflection (대학교수의 수업성찰 실천을 위한 이론적 기초 탐구)

  • Keum, Hye-Jin
    • Journal of Digital Convergence
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    • v.14 no.2
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    • pp.57-63
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    • 2016
  • The purpose of this study is to draw implications about a practice of university faculty member's teaching reflection by considering the concept, process, and content of reflection as a theoretical basis of teaching reflection. The concept of reflection is based upon 'reflection-in-action' suggested by $Sch{\ddot{o}}n$, and the process and content of reflection is explained through Korthagen's Core Reflection model. The following three implications conclude: First, a faculty member should write a reflection journal by observing and reflecting consistently one's own behavior in a context of teaching. Second, the center for teaching and learning should provide an orientation and consultation about the content and process of teaching reflection. Finally, sharing lessons with the colleague faculty member is required to make an effective reflection for each faculty member.

Study on Comparison of Methods for Estimation of Shear Wave Velocity in Core Zone of Existing Dam (기존 댐 코어죤의 전단파속도 산정기법 비교 연구)

  • Ha, Ik-Soo;Oh, Byung-Hyun
    • Journal of the Korean Geotechnical Society
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    • v.24 no.10
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    • pp.33-43
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    • 2008
  • In this study, for the purpose of evaluating the shear wave velocity in core zone, cross-hole test, down-hole test, MASW (Multi-channel Analysis of Surface Wave), and seismic reflection survey were carried out on the crest of the existing 'Y' dam. The results of field tests were compared one another. Furthermore, the field test results were compared with the result by the Sawada's empirical recommendation method. The purpose of this study is to compare the results of four kinds of field tests for evaluation of shear wave velocity in core zone of existing dam, to verify applicability of the empirical method which was recommended by Sawada and Takahashi, and to recommend a reasonable method for evaluation of shear wave velocity which is needed to evaluate tile maximum shear modulus of core zone. From the results of four kinds of field tests such as cross-hole test, down-hole test, MASW, and seismic reflection survey, it was found that the shear wave velocity distributions were similar within 18 m in depth and the results obtained by MASW and seismic reflection survey were almost the same by 30 m in depth. For evaluation of shear wave velocity in core zone of the existing dam, in consideration that it is not easy to bore the hole ill the core zone of existing dam, surface surveys such as MASW and seismic reflection method are recommended as realistic methods. On condition that it is impossible to conduct the field test and it is preliminary investigation, it is recommended that Sawada's low bound empirical equation be used.

The geophysical survey in shallow water and transitional region

  • Ashida Yuzuru
    • 한국지구물리탐사학회:학술대회논문집
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    • pp.1-15
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    • 2002
  • In the present paper, the marine reflection seismic survey, the survey using Chirp sonar, the detail topographic survey by narrow multi-beam sounding machine, the sea bottom geological condition survey by side-scan sonar, the sea bottom sampling by core sampler and the positioning by DGPS as the geophysical survey in shallow and transitional region are introduced by placing emphasis on hardware configuration.

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A Study on the Reflection House of Hiroshi Hara (하라 히로시의 반사성 주거에 관한 연구)

  • Min, Gun-Hee;Yoon, Chel-Jae
    • Journal of the Korean housing association
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    • v.24 no.6
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    • pp.33-40
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    • 2013
  • Hiroshi Hara is one of the most famous architect in the history of contemporary Japanese architecture. During the 1970's beginning with the Awazu Residence (1972), he designed a series of symmetrical houses, the so called 'Reflection House'. All the houses in this period were based on the method of 'reflection' and 'inversion', which means a radical reversal of the accepted notion that houses are parts of cities. A concept of "A house within a house" is expanded to "A city within a house". The important spatial characteristics of 'Reflection House' are main internal core and valley-like spaces forming internal urban streets by bringing natural elements and the components of streetscape such as plaza, open space, context of street facades and so on. This procedure is called as embedding 'city' into 'house', Hara mentioned. This paper investigates the outline of the 'Reflection House' and analyses the completed works of housing that were based on the theory. Then in the final part of the paper, the implications of 'Reflection House' and its influence on his later works of following period will be discussed.

Electromagnetic Characteristics of Carbon Black filled Class-Fabric Composite Sandwich Structure (카본블랙이 첨가된 유리직물 복합재 샌드위치 구조의 전자기적 특성)

  • Park, Ki-Yeon;Lee, Sang-Eui;Kang, Lae-Hyong;Han, Jae-Hung;Kim, Chun-Gong;Lee, In
    • Proceedings of the Korean Society For Composite Materials Conference
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    • pp.234-237
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    • 2003
  • The absorption and the interference shielding of the electromagnetic wave problem have been a very important issue for commercial and military purposes. This study dealt with the simulation reflection loss for electromagnetic absorbing sandwich type structures in X-band(8.2Ghz~12.4GHz). Glass/epoxy composites containing conductive carbon blacks were used for the face sheets and styrofoams were used for the core. Their permittivities in X-band were measured using the transmission line technique. Simulation results of 3-1ayered sandwich type structures showed the reflection loss using the theory about transmission and reflection in a multi-layered medium.

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Fabrication and Electromagnetic Characteristics of Electromagnetic Wave Absorbing Sandwich Structures (샌드위치 구조의 전자기파 흡수체 제작 및 전자기적 특성)

  • Park Ki-Yeon;Lee Sang-Eui;Han Jae-hung;Kim Chun-Gon;Lee In
    • Proceedings of the Korean Society For Composite Materials Conference
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    • pp.131-134
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    • 2004
  • The object of this study is to design the Radar Absorbing Structures (RAS) having sandwich structures in the X-band $(8.2\~12.4GHz)$ frequencies. Glass fabric/epoxy composites containing conductive carbon blacks and carbon fabric/epoxy composites were used for the face sheets. Polyurethane (PU) foams containing multi­walled carbon nanotube (MWNT) were used for the core. Their permittivities in the X-band were measured using the transmission line technique. The reflection loss characteristics for multi-layered sandwich structures were calculated using the theory of transmission and reflection in a multi-layered medium. Three kinds of specimens were fabricated and their reflection losses in the X-band were measured using the free space technique. Experimental results were in good agreements with simulated ones in 10dB absorbing bandwidth.

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Exploring the Experience of Motivational Interviewing Training to Improve Communication Skills in Parents of Adolescent Children (청소년 자녀를 둔 학부모의 의사소통능력 증진을 위한 동기면담 훈련 경험 탐색)

  • Seo, Nan Hee;Kim, Hee Jung
    • Journal of Korean Academy of Psychiatric and Mental Health Nursing
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    • v.27 no.3
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    • pp.252-263
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    • 2018
  • Purpose: The study's aim was to describe the experience of motivational interviewing (MI) training for parents with adolescents. Methods: Focus group interviews were carried out with 12 mothers in 3 groups who participated in the MI training. The study had a qualitative descriptive design, and qualitative content analysis was used. Results: Data analysis was separated into 4 domains: acceptance, relational skills, self-reflection, and rebuilding relationships. Seven categories and 11 subcategories included (1) enhancing acceptance and empathy, (2) recognizing the importance of the MI spirit and applying core skills, (3) improving self-expression and self-control of negative emotions and behavior, (4) recognizing self-problems, and (5) true communication and recovery of trust. Conclusion: Through MI training, participants have experienced not only the enhancement of their communication skills but also personal modifications (in self-acceptance, self-reflection, and self-control) and positive interpersonal relationships (rebuilding relationships). In addition, participants have realized the importance of listening and reflection in such experiences. Reflection training has provided participants meaningful experiences. Our key insight from these findings is that skill is not most important in communication training. MI elements such as acceptance, collaboration, and a respectful attitude are more likely to be used than conventional communication skills.

An Exploration of International Trends about the Core Competencies in Mathematics Curriculum (수학과 교육과정에 반영된 핵심역량의 국제적 동향 탐색)

  • Kim, Sun Hee;Park, Kyungmee;Lee, Hwan Chul
    • The Mathematical Education
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    • v.54 no.1
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    • pp.65-81
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    • 2015
  • The purpose of this study is to investigate the international trends of how the core competencies are reflected in mathematics curriculum, and to find the implications for the revision of Korean mathematics curriculum. For this purpose, the curriculum of the 9 countries including the U.S., Canada(Ontario), England, Australia, Poland, Singapore, China, Taiwan, and Hong Kong were thoroughly reviewed. It was found that a variety of core competencies were reflected in mathematics curricula in the 9 countries such as problem solving, reasoning, communication, mathematical knowledge and skills, selection and use of tools, critical thinking, connection, modelling, application of strategies, mathematical thinking, representation, creativity, utilization of information, and reflection etc. Especially the four most common core competencies (problem solving, reasoning, communication, and creativity) were further analyzed to identify their sub components. Consequently, it was recommended that new mathematics curriculum should consider reflecting various core competencies beyond problem solving, reasoning, and communication, and these core competencies are supposed to combine with mathematics contents to increase their feasibility. Finally considering the fact that software education is getting greater attention in the new curriculum, it is necessary to incorporate computational thinking into mathematics curriculum.

Smart Honeycomb Sandwich Panels With Damage Detection and Shape Recovery Functions

  • Okabe, Yoji;Minakuchi, Shu;Shiraishi, Nobuo;Murakami, Ken;Takeda, Nobuo
    • Advanced Composite Materials
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    • v.17 no.1
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    • pp.41-56
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    • 2008
  • In this research, optical fiber sensors and shape memory alloys (SMA) were incorporated into sandwich panels for development of a smart honeycomb sandwich structure with damage detection and shape recovery functions. First, small-diameter fiber Bragg grating (FBG) sensors were embedded in the adhesive layer between a CFRP face-sheet and an aluminum honeycomb core. From the change in the reflection spectrum of the FBG sensors, the debonding between the face-sheet and the core and the deformation of the face-sheet due to impact loading could be well detected. Then, the authors developed the SMA honeycomb core and bonded CFRP face-sheets to the core. When an impact load was applied to the panel, the cell walls of the core were buckled and the face-sheet was bent. However, after the panel was heated over the reverse transformation finish temperature of the SMA, the core buckling disappeared and the deflection of the face-sheet was relieved. Hence the bending stiffness of the panel could be recovered.

Preparation and Microwave Absorption Properties of the Fe/TiO2/Al2O3 Composites

  • Li, Yun;Cheng, Haifeng;Wang, Nannan;Zhou, Shen;Xie, Dongjin;Li, Tingting
    • Nano
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    • v.13 no.11
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    • pp.1850125.1-1850125.12
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    • 2018
  • To reduce the imbalance of impedance matching between the magnetic metal nanowires and free space, $Fe/TiO_2$ core/shell nanowire arrays with different diameters were fabricated in the templates of anodic aluminum oxide membranes by electrodeposition. The influences of the microstructure on the microwave absorption properties of the $Fe/TiO_2/Al_2O_3$ composites were studied by the transmission/reflection waveguide method. It was demonstrated experimentally that both the interfacial polarization and the diameter of the $Fe/TiO_2$ core/shell nanowires have critical effects on the microwave absorption properties. We also investigated the angle dependence of the microwave absorption properties. Due to the interfacial polarization and associated relaxation, the $Fe/TiO_2/Al_2O_3$ composites exhibited optimal microwave absorption properties when microwave propagation direction was accordant with the axis of the nanowires. Finally, we managed to obtain an optimal reflection loss of below -10 dB (90% absorption) over 10.2-14.8 GHz, with a thickness of 3.0 mm and the minimum value of -39.4 dB at 11.7 GHz.