• Title/Summary/Keyword: Reflection-in-practice

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Improvement of Reverse-time Migration using Homogenization of Acoustic Impedance (음향 임피던스 균질화를 이용한 거꿀시간 참반사보정 성능개선)

  • Lee, Gang Hoon;Pyun, Sukjoon;Park, Yunhui;Cheong, Snons
    • Geophysics and Geophysical Exploration
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    • v.19 no.2
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    • pp.76-83
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    • 2016
  • Migration image can be distorted due to reflected waves in the source and receiver wavefields when discontinuities of input velocity model exist in seismic imaging. To remove reflected waves coming from layer interfaces, it is a common practice to smooth the velocity model for migration. If the velocity model is smoothed, however, the subsurface image can be distorted because the velocity changes around interfaces. In this paper, we attempt to minimize the distortion by reducing reflection energy in the source and receiver wavefields through acoustic impedance homogenization. To make acoustic impedance constant, we define fake density model and use it for migration. When the acoustic impedance is constant over all layers, the reflection coefficient at normal incidence becomes zero and the minimized reflection energy results in the improvement of migration result. To verify our algorithm, we implement the reverse-time migration using cell-based finite-difference method. Through numerical examples, we can note that the migration image is improved at the layer interfaces with high velocity contrast, and it shows the marked improvement particularly in the shallow part.

A Study on Utilization of Teaching-Learning Portfolio for Improvement of Teaching Competency of Pre-Service Mathematics Teacher (중등예비수학교사의 수업능력 향상을 위한 교수-학습 포트폴리오 활용방안 연구)

  • Kang, Hyun-Young
    • School Mathematics
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    • v.16 no.3
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    • pp.567-584
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    • 2014
  • Recently professional development of teaching competence is emphasized for mathematics teachers. It is necessary to teaching experience in pre-service mathematics teacher for development of teaching competence. It need to systematic self-reflection and improvement in instruction performance for development of teaching competence of pre-service mathematics teacher. That is, Theory of teaching practice for reflect thinking and practical knowledge of teaching and systemic guidance on theory and practice of teaching practice. Therefore, the aim of this study is to develop an component and application procedure of Teaching and Learning portfolio for improvement teaching component of pre-service mathematics teacher. It is effective in improving teaching component of pre-service mathematics teacher after make Teaching and Learning portfolio for improvement teaching component.

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The Effect of the Problem-Based Learning for Training 'Classroom Friendly Teachers' - Focusing on the Elementary School Mathematics Education ('교실친화적 교사' 양성을 위한 문제중심학습 적용 효과 - 초등수학교육을 중심으로)

  • Lee, Kwang-Ho
    • School Mathematics
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    • v.13 no.4
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    • pp.543-562
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    • 2011
  • In this research, the PBL program was developed in terms of 'classroom practice ability', 'self-develop ability', and 'teaching profession character' which classroom friendly teachers get ready and was applied to the classroom friendly elementary mathematics teachers for studying the effectiveness of the program. From the result elementary preservice teachers' disposition in terms of thought about mathematics, mathematics learning, and mathematics teaching was changed to the positive direction through the PBL. They could developed their classroom practice ability, self-develop ability, and teaching profession character through application of new knowledge and plan for problem solving and reflection after solving the problems.

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Nursing Student's Experiences on Simulation Practice focusing on Cardiac Arrest (간호대학생의 심정지 시뮬레이션 실습 경험)

  • Song, Mi-Sook;Jae, Kyung-Sung
    • The Journal of the Convergence on Culture Technology
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    • v.4 no.1
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    • pp.119-128
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    • 2018
  • In this paper, The purpose of this qualitative research was to explore the experience of a nursing simulation practice focused on patients with cardiac arrest with 50 4th-year nursing students who participated the simulation practical education. The data collection period was from 12/4/2017 to 12/6. Subjects were asked to write a self-reflection journals with a narrative style in order to explore the cardiac arrest simulation practice experience. Data were analyzed using Thematic Analysis by Braun & Clarke. The results were "Expectation for types of simulation education", "A great deal of regret", "Pre-experience in cardiac arrest situation", "Cognition in the importance of team interaction", "Active reaction", "Extended role from a nursing student to a nurse." The results indiate that understanding the experience of a nursing simulation education for nursing students will be able to be used as baseline data which is needed to manage the method of the simulation education effectively.

Reflection on the Educator Mindset for Teaching Mathematics to Diverse Students in the Constructivist Elementary Classroom

  • Kim, Jinho;Lim, Woong
    • Research in Mathematical Education
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    • v.21 no.1
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    • pp.35-46
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    • 2018
  • In this perspective paper, we present seven elements of the appropriate educator mindset for teaching in the constructivist elementary mathematics classroom. The elements include supporting students as they construct their own understanding, eliminating deficit view of slow learners, setting new understanding and growth as the learning objective, providing opportunities to co-construct meaning with peers, using student contributions as the source of curricular material, encouraging all students to participate in learning, and providing instruction not bounded by time. In our struggles to provide authentic, inclusive elementary classrooms, we hope that our discussion of the educator mindset can increase discourse on constructivism from philosophy to practice in the community of mathematics education and policy makers.

An Exploration on the Reasoning Competency Element Represented in the New Seventh Grade Mathematics Textbook (2015 개정 수학 교과서에 반영된 추론 역량 요소 탐색 - 중학교 1학년 함수 영역을 중심으로 -)

  • Hwang, Hye Jeang
    • East Asian mathematical journal
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    • v.37 no.2
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    • pp.149-167
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    • 2021
  • The six core competencies included in the mathematics curriculum revised in 2015 are problem solving, reasoning, communication, attitude and practice, creativity and convergence, information processing. In particular, the reasoning is very important for students' enhancing much higher mathematical thinking. Based on this competency, this study selected the four elements of investigation and fact guess, justification, the logical performance of mathematical content and process, reflection of reasoning process, And also this study selected the domain of function which is comprised of the content of the coordinate plane, the graph, proportionality in the seventh grade mathematics textbook. By the subject of the ten kinds of textbook, this study examined how the four elements of the reasoning competency were shown in each textbook.

The Research Related to Kansei Stimulation Elements in Cyber-Space

  • Dong, Oh-Gi
    • Proceedings of the Korean Society for Emotion and Sensibility Conference
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    • 2001.05a
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    • pp.68-73
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    • 2001
  • The word "cyber-space" was coined through the developments in communication technology and computers. It became possible to experience disembodied space in practice through a new kind of medium. this research aims to clarify the kansei stimulation elements as realistic sensed by users who use 3-dimensional expressions in cyber-space. The research was carried out by preparing 25 samples of computer graphics, and administering 3 questionnaires to 12 examinees. The Principal Ingredient Analysis method was used for its analysis and assessment. As a result of this research, it can be concluded that materials, reflection and shadow have the strongest effect on human beings' senses in cyber-space.

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A Study of Student Nurses' Observation Experiences of Human Body Dissection (간호학생의 인체해부관찰경험)

  • Kim, Mi-Hee;Chae, Myeong-Jeong
    • Journal of Korean Biological Nursing Science
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    • v.14 no.2
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    • pp.94-102
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    • 2012
  • Purpose: This study attempted to describe the essential structure of nursing students' experiences as observers of human body dissection. Methods: The research was undertaken as qualitative research. The data was collected through written sources of 169 students majoring in nursing. The analysis of data was made using the phenomenological analytic method suggested by Colaizzi (1978). Results: In this study, five categories of themes emerged. They were: 'unfamiliar wait','standing at the edge of chaos','growth through reflection', 'be immersed in practice', 'winging to be a nurse'. Conclusion: This study will prove helpful not only in understanding nursing students' observation experiences of human body dissection but also in describing their needs for systematic and emotional support.

Human and Society-Centered Learning Outcomes in Basic Medical Education (사람과 사회 중심의 기본의학 학습성과)

  • Kim, Dae Hyun
    • Korean Medical Education Review
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    • v.18 no.3
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    • pp.150-155
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    • 2016
  • Learning objectives for human and society-centered basic medical education to improve physicians' ability to practice in a Korean context were developed by the Korean Association of Medical Colleges in 2015-2016. The task-force committee identified eight domains for medical practitioners: human illness, reflection and self-improvement, patient safety, communication and collaboration, medical ethics, legal issues, social accountability, and professionalism. A total of 172 enabling learning outcomes and 42 terminal learning outcomes were identified by the workshop. The workshop members were representatives from 41 medical schools, the Korean Medical Association, and a scientific group (medical ethics, legal issues, and medical communication). The curriculum for "medical humanity and social medicine" was first published in 2007. The human and society-centered learning objectives that were developed will be revised annually.

Using the Writing Template provided by the Science Writing Heuristic (SWH) approach for Quality Arguments

  • Choi, Aeran
    • Journal of The Korean Association For Science Education
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    • v.32 no.9
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    • pp.1470-1488
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    • 2012
  • This study examined changes in the quality of written arguments produced by freshman students in general chemistry laboratory classes using the SWH approach over a semester; difference in the quality of written argument between the original writing template (year I) and the extended writing template (year II); and any difference between Total Argument and Holistic Argument scores. 140 writing samples from 14 students on the year I and 228 samples from 19 students on the year II were collected. Results indicated that despite fluctuations, the students were producing stronger argument by the end of semester compared to the beginning of the semester. Original SWH template group received significantly higher argument scores than extended SWH template group. For the most of year I laboratory investigations, there was no significant difference in the quality of argument between Total Argument and Holistic Argument scores. An implication of this study would be to provide opportunities for students to practice constructing arguments using the original SWH writing template including questions, claims, evidence, and reflection.