• 한국학교수학회논문집
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• 제22권1호
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• pp.63-80
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• 2019

본 연구는 중등예비수학교사의 학생의 학습에 대한 노티싱을 살펴보기 위해 시작되었다. 이를 위해 4명의 중등예비수학교사가 중학교 수학수업에서 학습보조교사 활동을 하고 작성한 일지를 조사하였다. 일지에 나타난 학생에 대한 노티싱은 선행연구의 분석틀을 기초로 하여 알아차리기, 해석하기, 반응하기의 세 가지로 구분하여 분석하였다. 연구결과 중등예비수학교사들은 대체로 학생에 대한 일반적인 알아차리기가 많고 수학적 사고에 대한 해석하기가 상대적으로 적게 나타났다. 반응하기에서는 질문을 통한 학생의 사고 촉진보다는 학생들에게 설명하기가 많이 나타남을 확인하였다. 이를 토대로 중등예비수학교사 교육프로그램에 주는 시사점을 논의하고자 한다.

• 한국농공학회논문집
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• 제65권6호
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• pp.51-63
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• 2023

To improve the problem that the settlement curve of the consolidation theory of Terzaghi does not match well with the actual settlement curve, we included a secondary compression settlement and analyzed it by varying the beginning point and then obtained the following results. The current methods of calculating the compression index from the  log𝜎 curve and the coefficient of consolidation from the time-dependent settlement curve for each consolidation pressure proved that the final settlement amount will be consistent after a long time, but the actual settlement amount will always be smaller than the predicted settlement amount during the settlement progress stage. The consolidation factors estimated by the curve fitting with the condition that the secondary compression begins in the second half of the primary compression showed similar values to the consolidation factors estimated by the curve fitting for the primary compression only, and the settlement curves were in better agreement throughout the compression. It showed different values, showing low validity. It can be inferred that secondary compression acts from the point when a significant portion of the excess pore water pressure is dissipated, and the loading stress begins to have more influence on the skeletal structure of the soil. Analysis results show that secondary compression begins at the range of 91 % to 98 % on the average degree of primary consolidation.

• 한국윤활학회:학술대회논문집
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• 한국윤활학회 2000년도 제31회 춘계학술대회
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• pp.227-236
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• 2000

The secondary motion of piston greatly influences the dynamic and frictional performances of an engine. The motion is very related to the clearance, sliding velocity and skirt profile, etc. In our work, piston dynamics is analyzed with the commercial analysis software, PISDYN by Ricardo Consultant Engineers, Inc. The effects of profiles with piston pin offsets are studied regarding the secondary motion of piston and several results are compared.

• Journal of applied mathematics & informatics
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• 제29권5_6호
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• pp.1295-1302
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• 2011

We present an analytic model of an unslotted opportunistic spectrum access (OSA) network and evaluate its performance such as interruption probability, service completion time, and throughput of secondary users. Numerical examples are given to show the performance of secondary users in cognitive networks. The developed modeling and analysis method can be used to evaluate the performance of various OSA networks.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1988년도 추계학술대회 논문집 학회본부
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• pp.329-332
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• 1988

In this paper, A analysis method about air gap field of L.I.M. considering Transverse Edge Effect is suggested. Especially, the case of displacement of primary and secondary it can be analysed and criteria for design of L. I. M. is proposed by proving the influance of ratio of width for primary and secondary to the characteristic

• Nuclear Engineering and Technology
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• 제38권4호
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• pp.319-326
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• 2006

A brief review is presented on the ion beam application in science and technology. ion beams are used very effectively in various fields of science and technology, on the basis of advance in accelerator technology and experimental techniques for ion beam utilization. Recent progress in this field is reviewed in terms of the direct ion beam utilization like ion beam analysis, and the utilization of neutrons as secondary particles.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2014년도 전력전자학술대회 논문집
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• pp.329-330
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• 2014

This paper presents an analysis of the interleaved effects for the secondary winding distribution of a toroidal transformer. The equations to calculate the leakage inductance are derived using the MMF diagram for the distributed secondary windings. The simulation and experimental results are provided to show the effect of the leakage inductance reduction.

• 대한조선학회논문집
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• 제58권3호
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• pp.137-143
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• 2021

In this study, the fracture strength of Flexible Secondary Barrier (FSB) composites was standardized by conducting a distribution analysis of the fracture probability, considering that the fracture strength of FSB composites such as glass fiber reinforced composites is relatively large. As the mechanical performance of FSB composites varies with the fiber direction, 20 replicate uniaxial tensile tests were performed for different temperatures ranging from the ambient to cryogenic conditions, considering the actual operating environment of liquefied natural gas. For the probability statistical analysis, the Weibull distribution analysis derived from the weakest link theory was used, considering the large variance in the fracture strength and brittle fracture behavior. The results of the Weibull distribution analysis were used to calculate the standard fracture strength of the FSB composites for different fiber directions. The findings can help ensure the reliability of the FSB mechanical properties in different fiber directions in the design of the secondary barrier and structural analyses.

• Design & Manufacturing
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• 제16권1호
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• pp.36-42
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• 2022

Globally, as population growth and economic development continue, resource consumption is increasing rapidly. As an alternative to electric vehicles was suggested as the environmental pollution problem emerged, the number of registered electric vehicles in Korea increased by more than 137 times compared to 2013. Secondary batteries are expected to expand into various markets such as small IT devices and electric vehicles, and the most important part of electric vehicles is the battery (secondary battery). Therefore, in this study, to analyze the stability of the CSM (Classifier Separator Mill) grinding disc that crushes secondary battery raw materials, structural analysis and vibration analysis of the 1st to 4th grinding discs and the final model were performed. The change of bending by the weight of the Grinding Disc is at least 0.065㎛ and maximum 0.075㎛, and the change by the standard gravity is judged to be very low. The strain is at least 0.00031㎛/㎛ and maximum 0.00078㎛/㎛, and even if the number of Hamer increases, the change by the weight is judged to be insignificant. When the Grinding Disc rotates at a maximum of 6000rpm, the deformation and deformation rate of the first to third models are similar, but the fourth model (Hamer 10EA) is more than three times and the final model (Hamer 12EA) is about four times. However, the maximum deformation is 28.21㎛, which is considered to be insignificant when the change is 6000rpm. Six modes of natural Frequency analysis of the 1st~4th order and final model of the grinding disc appeared to be bent or twisted.

• 대한한의학회지
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• 제35권1호
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• pp.88-98
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• 2014

Objectives: The purpose of this study is to investigate the relationship between bone age, chronological age, anthropometric parameters, and diagnosed pulse rate on child-adolescence's growth according to sex and the revelation of secondary sexual characteristics. Methods: Growth-concerned 44 children and adolescence (from 6 to 16 years) were analyzed in retrospective study. They visited Korean Medical Clinic in Suwon, Korea from January 2012 to October 2013. Individual bone age (BA), chronological age (CA), Risser sign, anthropometric parameters, and pulse rate were measured. The correlations of each variable were done by Pearson analysis, Spearman analysis and Regression analysis. Results: 1. The female group was shown to have stronger negative correlation between pulse rate and BA, CA than the male group. In gender analysis, the female group showed negative correlation between weight and pulse rate. 2. In a further analysis according to the revelation of secondary sexual characteristics, the group of child-adolescent without secondary sexual characteristics was shown to have stronger negative correlation between pulse rate and BA, CA than the group with secondary sexual characteristics. The height percentile and pulse rate were negative correlation in secondary sexual character being. 3. The Risser sign and pulse rate were not correlated in this study. Conclusions: These findings suggested that a regular and continual measurement of pulse rate is effective in estimating potential for growth in child-adolescent group.