일차함수의 그래프에서 교사와 학생의 수학적 주목하기 차이에 관한 설명적 사례 연구

김슬비,이종희 이화여자대학교 교과교육연구소 2019 교과교육학연구 Vol.23 No.5

The purpose of this study is to find out the differences between a teacher and students on mathematical noticing of linear function graphs in case of translations, intercepts and slopes and to suggest methods of teaching linear function graphs. To serve this purpose, a framework was developed for analysis on mathematical noticing of linear functions graphs, using a conceptual framework of Value-Thinking and Location-Thinking (David et al., 2019) and mathematical noticing (Kim,2019). The results showed a teacher and students paid attention to the value or location of the point on the graphs of the linear functions. Although a teacher and students paid attention to the same point on the graphs of the linear functions, they differently interpreted and responded. This result indicated that the aspects of thinking to help students’ mathematics learning were different in the domains of translation, intercept, and slope of the graphs of the linear functions. The researchers suggest mathematical noticing on Value-Thinking in translations, Location-Thinking in intercepts, and Location-Thinking and then Value-Thinking in slopes, would help students better understand. 본 연구는 일차함수의 그래프 수업에서 교사와 학생의 수학적 주목하기의 차이가 있음을 평행이동, 절편, 기울기 수업 사례로부터 확인하고 지도방향을 모색하는 것이 목적으로 한다. 이를 위해 Kim(2019)의 수학적 주목하기와 David et al. (2019)의 수치적, 위치적 사고의 개념적 틀을 이용하여, 일차함수의 그래프를 분석하기 위한 틀을 고안하였다. 연구 결과 교사와 학생은 일차함수의 그래프 위의 점에서 수치 또는 위치에 주의를 기울여 수학적 주목하기의 차이가 발생하는 것으로 나타났고, 같은 대상에 주의를 기울이더라도 수치적 또는 위치적으로 해석하여 수학적 주목하기의 차이가 발생하는 것으로 나타났다. 이로부터 일차함수의 그래프의 평행이동, 절편, 기울기의 각 영역에서 학생의 수학 학습을 돕는 사고의 측면이 다름을 확인할 수 있었다. 평행이동에서는 수치적으로 주목하고, 절편에서는 위치적으로 주목하며, 기울기에서는 위치적으로 주목한 후에 수치적으로 주목하는 것이 학생들의 이해를 도울 수 있을 것임을 제안한다.

수학 중등 교사들 간의 수학교수지식 차이 (MKT) 발생 요인 분석 및 이를 통한 통계적 소양 신장 방안

김슬비,황혜정 영남수학회 2023 East Asian mathematical journal Vol.39 No.2

The purpose of this study is to confirm the MKT(Mathematical Knowledge for Teaching) of the in-service mathematics teachers on the statistics(Representative value, Degree of scattering) through the comparative analysis between the sub-elements of the MKT. In addition, it is to examine the factors that cause the difference of the subjects’ MKT. To accomplish this, by the subject of 12 secondary in-service mathematics teachers, in this study the test items of the MKT on the statistics were developed and data were collected and analyzed. As a result of the analysis of the MKT test sheet, the CCK(Common Content Knowledge) and SCK(Specialized Content Knowledge) of the mathematics teacher was confirmed as a high score, whereas the and KCS(Knowledge of Content and Students) and KCT(Knowldge of Curriculum and teaching) were confirmed as low scores. In addition, through these results, it was shown that the difference in MKT’s elements the middle school and high school teachers obtain occurred slightly.

수학 교과에서의 주목하기(Noticing)에 관한 이해

김슬비,황혜정,Kim, Seul Bi,Hwang, Hye Jeang 영남수학회 2021 East Asian mathematical journal Vol.37 No.4

There have been gradually a few studies on Noticing in the domestic and international area. For the purpose of increasing the concern on teacher noticing and pursuing the affluent studies on the noticing, this study tried to explore and understand the background, the meaning, and the properties of the teacher noticing while summing up the views of the various researchers. As a result, the teacher noticing could be defined as a cognitive process which is focused on mathematical objects, students' mathematical thinking, students' emotions, teaching strategies, classroom environment and interprets them to determine how to react. From this, noticing might be cognitive process which is a combined form of the objects and cognitive behavior, while the objects whom teachers notice covers up the mathematical objects and the teaching objects. Eventually, this study expects to serve as a basis to foster the in-depth understanding of teacher noticing and to derive the follow-up studies.

전기방사한 PVDF 기반의 강수 센서 제작 및 강수형태에 따른 압전특성에 관한 연구

김슬비,이세영,김한성,Kim, Seul Bi,Lee, Se Young,Kim, Han Seong 한국섬유공학회 2016 한국섬유공학회지 Vol.53 No.2

Polyvinylidene fluoride (PVDF) is a popular piezoelectric polymer because of its mechanical properties, high flexibility, thermal stability, chemical resistance, and relatively low cost. These features make PVDF attractive for applications such as electromechanical actuators and energy harvesters, in which physically flexible devices perform energy conversion. This study used PVDF as the sensor element in a piezoelectric rain sensor that was manufactured from electrospun PVDF nanoweb. The reactivity of the rain sensor was investigated by using high speed photography to study the correlation between the sensor angle and raindrop height, raindrop frequency and raindrop weight. The piezoelectric voltage signals produced were found to vary as a function of raindrop form.

Fabrication and characterization of silica thin film with polyphenolic compound

김슬비,이현정,박지훈 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.1

Silica thin films were widely used in various application such as wettability control, microelectronics and biomedical. In this work, we fabricated silica thin films using tetraethyl orthosilicate(TEOS) which commonly used as silica formation precursor based on polyphenolmetal complex of Fe(Ⅲ)-Tannic acid(TA). TA was known for being interaction with silicic acid and material-independent nanocoating with metal ions. The silica films with Fe(Ⅲ)-TA priming layer was formed on various substrates and characterized properties of films. We envisioned that the silica thin films will be applicable to diverse fields of industry and bio-based technologies.

수학 교과에서의 교사와 학생 상호 주목하기(Noticing)에 관한 이해

김슬비,황혜정 영남수학회 2022 East Asian mathematical journal Vol.38 No.4

This study tried to explore and understand the meaning, and the properties of noticing. The result of this study were first, the difference in mathematical noticing is distinguished in either the object which is paid attention is different or the object is same but differently interpreted or react. The cause of each difference could be described as mathematical objects such as conceptual objects and perceptual features. Second, teachers' teaching strategies, which narrow the gap in attention and play a key role in the formation of mathematical meaning, appeared in various places. This teaching strategy was implemented to distract students’ attention. This study confirmed that the mathematical attention of teachers and students in math classes will differ depending on the object to which they pay attention, and that difference will be narrowed through teacher’s discourse practice and teaching strategies through communication strategies.

Hotelling의 T2 통계량을 이용한 모형사면에서의 다센서 데이터 이상거동 감자기법 개발

김슬비 ( Seul Bi Kim ),김형신 ( Hyung Sin Kim ),서용석 ( Yong Seok Seo ),채병곤 ( Byung Gon Chae ),최정해 ( Jung Hae Choi ) 대한지질공학회 2013 대한지질공학회 학술발표회논문집 Vol.2013 No.1

구두발표 : x-MR 관리도기법을 이용한 모형사면에서의 붕괴시점 감지기법 개발

김슬비 ( Seul Bi Kim ),김형신 ( Hyeong Sin Kim ),서용석 ( Yong Seok Seo ),채병곤 ( Byung Gon Chae ),최정해 ( Jung Hae Choi ) 대한지질공학회 2013 대한지질공학회 학술발표회논문집 Vol.2013 No.1

통계관리도와 구조변화 검정을 이용한 지진 계측 데이터 분석

김슬비, 김보람, 서용석 忠北大學校部設基礎科學硏究所 2011 自然科學硏究 Vol.25 No.-

본 연구에서는 통계관리도기법과 구조변화검정을 이용하여 지진발생 시점의 지각 변위 양상을 분석하고, 지 진 데이터의 통계적 분석의 유효성을 검증하였다. 일본 이토지역에서 1998년 4월에 발생한 지진에 대하여 상 기 분석방법을 이용해 변위감지 시점과 분석된 결과를 비교하였으며, 그 결과 주 변위가 발생한 시점과 통계관 리도기법 및 구조변화검정을 통해 나타난 변위의 시점이 거의 일치하는 경향이 나타났다. 따라서 통계관리도기 법과 구조변화검정이 지진 계측데이터를 활용하여 지진발생 시점을 분석하는데 유용한 것으로 판단된다.

논문 : Hotelling의 T-square 통계량을 이용한 강우유발 사면붕괴 예측

김슬비 ( Seul Bi Kim ),나종화 ( Jong Hwa Na ),서용석 ( Yong Seok Seo ) 대한지질공학회 2015 지질공학 Vol.25 No.3

본 연구에서는 화강암 풍화토와 편마암 풍화토를 대상으로 모형시험 수행 중 획득한 간극수압, 함수비 데이터를 대상으로 Hotelling의 T2 분석을 실시하여 사면의 이상거동을 감지할 수 있는 기법을 개발하였다. 각 시험에서는 간극수압 3개와 함수비 3개가 동시에 측정되며, 이들의 상관관계를 이용하여 신뢰구간 95.0%와 90.0%를 기준으로 T2 통계량을 계산하였다. 분석결과에 의하면 모형사면 내의 국부적인 붕괴는 센서 위치에 따라 감지하지 못하는 경우가 있으며, 사면 전체붕괴의 경우 수백 초에서 수천 초 전에 T2 통계량이 신뢰구간 90%를 초과하여 이상거동을 감지할 수 있었다. Hotelling의 T2 분석은 동일 사면 내 다양한 측정치 간의 상관성을 분석할 수 있어 유일한 관리기준치를 설정할 수 있으며, 신뢰도 수준에 따라 단계적인 예경보 기준설정이 가능하다. A new technique is presented to detect unstable slope behavior, based on Hotelling’s T2 analysis of pore pressure and water content obtained during flume tests using granitic and gneissic weathered soils. Three sets of pore pressure-water content values were simultaneously obtained during each test, and T2 statistics at the 90.0% and 95.0% confidence levels were calculated based on the correlations between values. The results show that unsuccessful detection of some local failures of the flume slope depended on the sensor position. In the case of global slope failures, anomalous behavior was detected between several hundred and several thousand seconds before the event as T2 statistics exceeded the confidence interval 90%. Hotelling’s T2 analysis provides a single control criterion because it enables correlations between diverse measured values within the same slope; the criterion also includes stepwise criteria for a forecasting and warning system based on confidence levels.