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Preservice Elementary Mathematics Teachers' Curricular Noticing: Focusing on the Lesson Planning for Rate (초등예비교사의 교육과정에 관한 노티싱: 비율 수업을 중심으로)

  • Cho, Mi Kyung
    • Education of Primary School Mathematics
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    • v.24 no.2
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    • pp.83-102
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    • 2021
  • Curricular noticing is about how teachers understand the content and pedagogical opportunities inherent in curriculum materials. Since the enacted curriculum differs depending on which aspect of the curriculum material is paid attention to and how to interpret it, it is necessary to focus on Curricular Attending and Curricular Interpreting in Curricular Noticing for enhancing the teaching expertise of preservice teachers. First, this study categorized the objects that preservice elementary mathematics teachers attended when planning the lesson for rate. Second, in order to find out the reason for paying attention to those objects, it was analyzed what factors were related to interpret. By discussing the results, implications were drawn on how to use Curricular Noticing in preservice teacher education to enhance the pedagogical design competency of preservice elementary mathematics teachers.

Effect of Borehole Fluid and Casing on the Borehole Electromagnetic Responses (공내수 및 케이싱이 시추공 전자탐사 반응에 미치는 영향)

  • Cho Seong-Jun;Kim Jung-Ho;Yi Myeong-Jong;Chung Seung-Hwan;Song Yoonho
    • Geophysics and Geophysical Exploration
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    • v.2 no.2
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    • pp.104-111
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    • 1999
  • As a practical developing step of electromagnetic (EM) tomography technique, we quantitatively analyzed the effects of borehole fluid and casing on the borehole EM responses. The EM response turns out to have nothing to do with the property of the borehole fluid except in the close vicinity of the transmitter, which shows the wide perspective of the application of borehole EM. Single-hole responses in the presence of the steel casing throughly reflect those of the casing itself since its extremely high induction number or shallow skin depth. EM responses through steel casing do show the information of the host medium. In the near field region which corresponds to low frequency or the vicinity of the borehole, however, we can not separate the signal containing the information of the host from that of casing. Otherwise, the severe attenuation of energy in the casing at high frequencies renders the signal undetectable. The optimum frequency is, therefore, to be chosen to extract the information of the host considering both the property of the casing and the skin depth of the medium and the practical technique to determine the casing property through single-hole measurements is required.

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The Effects of Focusing Attitudes and Cognitive Emotion Regulation on Post-traumatic Growth of Trauma-Exposed Adolescent Athletes (외상을 경험한 청소년 운동선수들의 포커싱적 태도와 인지적 정서조절이 외상 후 성장에 미치는 영향)

  • Kim, Sang-Tai;Jang, Hong-Young
    • Journal of Digital Convergence
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    • v.17 no.10
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    • pp.479-487
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    • 2019
  • The study sought to reveal the impact of focusing attitudes and cognitive emotion regulation on post-traumatic growth for adolescent athletes with trauma experiences. A preliminary survey was conducted on 215 middle and high school athletes in the S city and K provinces. The impact of focusing attitudes and cognitive emotion regulation on post-traumatic growth was verified using validated questionnaires. The results for the purpose and method of study are as follows. Focusing attitudes and cognitive emotion regulation of adolescent athletes affect post-traumatic growth. Positive reappraisal was the most influential factor affecting post-traumatic growth, followed by the factors influencing the aware, acceptance, accept, reflect and positive refocusing. In order to experience post-traumatic growth through the results of this study, it is important to understand the overall understanding and tactics of focusing attitudes and cognitive emotion regulation. Therefore, effective psychological training methods will be needed to positively control the level of focusing attitudes and cognitive emotion regulation among adolescent athletes.

Analysis of Noticing Characteristics Presented in Elementary Pre-service Teachers' Self-reflection Journals on the Science Class (초등 예비교사의 과학수업 성찰지에 나타난 노티싱 특성 분석)

  • Yoon, Heojeong
    • Journal of Korean Elementary Science Education
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    • v.41 no.4
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    • pp.754-770
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    • 2022
  • For teachers, noticing refers to paying attention to something, indicating they interpret it and how they are willing to react to it in the context of their own instruction. Analysis of noticing features enables us to understand the overall characteristics of the teacher's lesson design, practice, and reflection, which are core agents in the educational design and implementation. This can also be taken to be the basis of education design for competency reinforcement for teachers. Therefore, in this study, the characteristics of noticing shown in teachers' reflections after class design and demonstration were identified. For this purpose, the self-reflection journals of 106 elementary pre-service teachers enrolled in the College of Education in Gangwon-do were analyzed. In particular, the journals were gathered that were written after the demonstration dealing with the change of gas volume by temperature in science class. After designing a noticing analysis frame consisting of the five dimensions 'agent', 'stage', 'topic', 'focus', and 'stance', the frequency and ratio of noticing by each dimension's components were derived. The frequency and ratio of noticing for the dimension of 'focus' were analyzed for the dimensions of 'stage' and 'topic'. The results of the study were as follows. For the dimension of 'agent', the frequency of teacher and student was the highest, and for the dimension of 'stage', inquiry activity was the highest. For the 'topic' dimension, class design according to the teaching strategy appeared most frequently, and in the 'focus' dimension, the cases that did not specify the goal of the class and the competencies to be achieved by the students appeared most frequently. In the 'stance' dimension, description showed the highest frequency. From the analysis of how the 'focus' changes according to the 'stage' and 'topic', it was found that a characteristic focus appeared for each component of the dimension. From these results, the implications of the noticing characteristics of pre-service teachers for the design and implementation of teacher education were discussed.

Evaluation of Seismic Performance on Shear Walls in Steel House (스틸하우스 전단벽체의 내진성능평가)

  • 이재석;이승은;홍건호;김원기
    • Journal of the Earthquake Engineering Society of Korea
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    • v.6 no.6
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    • pp.65-72
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    • 2002
  • This study estimates steel house shear wall's seismic performance depending on trend of seismic design. As a result at cyclic-test, the capability of energy dissipation about X1SPCH during this test is good enough. The capability of energy dissipation of X3SPCH and X4SPCH was better than that of X1SPCH. The X2SPCH which is similar to real X-braced shear wall has better seismic performance than shear wall braced with structural sheathing materials on pseudo-dynamic test.

$-{\rho}a$ by One Steel Casing Borehole near Resistivity Survey Line (비저항 측선 근처 철케이싱 시추공 한개에 의한 $-{\rho}a$)

  • Jung, Hyun-Key
    • 한국지구물리탐사학회:학술대회논문집
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    • 2006.06a
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    • pp.83-86
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    • 2006
  • From numerical modeling test $-{\rho}a$ by one steel casing borehole near resistivity survey line can be acquired. Negative apparent resistivities even in the flat area are surely subsurface information. Inversion technique for those need to be developed in the near future.

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A Preliminary Study on Correction for Density Log in Cased Boreholes (케이싱 환경에서의 밀도자료 보정을 위한 기초연구)

  • Kim, Yeong-Hwa;Kim, Ji-Hoon;Lee, Seung-Jin
    • The Journal of Engineering Geology
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    • v.16 no.4 s.50
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    • pp.429-435
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    • 2006
  • A preliminary study was made for density correction for the effect of separation between sonde and borehole wall due to the existence of casing in a borehole. Firstly, series of gamma-gamma measurements were obtained with 3 different separations in 3 different density models constructed in Kangwon National University. Secondly, density correction charts were made based on the 'spine and ribs' technique in mud cake correction. Using these charts, we could determine effectively the true density from the measurement in the thinly cased borehole.