교사의 도구적 오케스트레이션에 관한 활동이론적 분석: 계산기 기반 초등 수학 영재 수업을 중심으로

강영란,조정수,Kang, Young Ran,Cho, Cheong Soo 대한수학교육학회 2015 학교수학 Vol.17 No.2

본 연구는 계산기를 활용하는 초등 수학 영재 수업에서 나타나는 교사의 도구적 오케스트레이션 유형을 분석하고 활동체계로 도식화해 봄으로써 공학이 통합된 수업에 관한 교사의 교수학적 실행에 대한 이해를 얻고자 하는데 목적이 있다. 이를 위해 Y초등학교 5학년 영재 학급을 대상으로 미시적 문화기술지를 활용한 질적 연구를 수행하였다. 영재 수업에 참여관찰하면서 영재 학급 내 구성원들과 인터뷰를 실시하고, 다양한 문서 자료를 수집하였다. 그리고 수집된 질적 자료를 분석하기 위해 분석적 귀납법을 적용하였으며, Drijvers, Boon, Doorman, Reed, & Gravemeijer의 도구적 오케스트레이션 유형과 Engestrom의 2세대 활동이론을 개념적 준거틀로 활용하였다. 본 연구 결과에 따르면 '기술-설명하기', '스크린-화면-연결하기', '발견-소집단 탐구하기', 그리고 '기술-화면-설명하기'의 4개의 유형이 나타났다. The purpose of this study was to obtain a deeper understanding of didactic processing in the class that unified with engineering by analyzing on the types of the teacher's instumental orchestration and schematizing it as an activity system. In order to do so, a qualitative study of a 5th grade class for math-gifted students in Y elementary school with ethnography was conducted. Interviews with the students were held and various document data were collected during the participational observation of the class. The collected qualitative data were gone through the analytical induction while the instrumental orchestration of Drijvers, Boon, Doorman, Reed, & Gravemeijer as well as the secondgeneration activity theory of Engestrom were using as the frame of conceptional reference. According to the result of this study, there exist 4 types, such as 'technical demo' 'link screen board', 'detection-exploring small group' and 'explain the screen and technical demo'.

ACODESA(Collaborative Learning, Scientific Debate and Self Reflection) 방법을 적용한 문제해결 과정에서 나타난 표상의 분석

강영란 ( Young Ran Kang ),조정수 ( Cheong Soo Cho ) 한국수학교육학회 2015 初等 數學敎育 Vol.18 No.3

본 연구는 초등학교 6학년 수학 영재 학생을 대상으로 ACODESA1) 방법을 적용한 문제해결 과정에서 나타나는 표상 사용의 유형을 분석하였다. 수업 설계는 다양한 표상의 조직화된 사용을 강화시키는 ACODESA 방법에 따라 이루어졌으며 40분 동안 4차시에 걸쳐 수업이 진행되었다. 자료 분석을 위해 동영상 촬영, 학생과의 인터뷰 등을 수집하여 녹취록을 작성하였고, Despina(2011)의 표상 사용유형에 따라 표상의 변화를 분석한 결과 추가형, 정교화, 그리고 제한형이 나타났다. 이러한 연구 결과를 통해 문제해결 과정에서는 개인적 표상이 소그룹별 토론과 확인의 과정을 거쳐 제도적 표상으로 생성될 수 있는 수업 설계가 필요함을 알 수 있었다. This study analyzed changes of representations which had come up in the problem-solving process of math-gifted 6th grade students that ACODESA had been applied. The class was designed on a ACODESA procedure that enhancing the use of varied representations, and conducted for 40minutes, 4 times over the period. The recorded videos and interviews with the students were transcribed for analysing data. According to the result of the analysis, which adopted Despina``s using type of representation, there appeared types of ‘adding’, ‘elaborating’, and ‘reducing’. This study found that there is need for a class design that can make personal representations into that of public through small group discussions and confirmation in the problem-solving process.

T1-73 계산기를 활용한 초등 5학년 수학 영재 학급의 수업 분석

강영란 ( Young Ran Kang ) 한국수학교육학회 2013 初等 數學敎育 Vol.16 No.3

분수 나눗셈의 문장제에 대한 초등 교사들의 전문화된 내용지식(SCK) 분석

강영란 ( Young Ran Kang ),조정수 ( Cheong Soo Cho ),김진환 ( Jin Hwan Kim ) 한국수학교육학회 2012 수학교육논문집 Vol.26 No.3

Ball, Thames, Phelps(2008)는 수학을 가르치는 교사에게는 특별히 수학 가르침을 위한 지식(MTK)이 필요하다고 주장을 하면서 그 하위 영역으로 학생들이 분수의 나눗셈을 수행하는 것에 대해 평가할 수 있는 교사의 능력과 같이 특정 영역에 대한 지식과 기술을 의미하는 전문화된 내용 지식(SCK)을 제시하였다. 본 연구에서는 초등 6학년 학생들에게 교과서에서 유일하게 제시된, 문장제 만들기, 즉 분수 나눗셈 9/10÷2/5에 알맞은 문장제 문제를 만들게 하였고, 이들이 제시한 답의 유형을 네 가지의 유형으로 분류하였다. 각 대표적인 유형의 답들을 선택하여 초등 6학년을 지도한 경험이 있는 10명의 교사들에게 제공하였고, 이 답들에 대한 평가를 하는 과정에서 나타나는 오류와 분수 나눗셈에 대한 문장제의 의미를 통해 교사들의 전문화된 내용 지식(SCK)을 분석하였다. Ball, Thames & Phelps(2008) introduced the idea of Mathematical Knowledge for Teaching(MKT) teacher. Specialized Content Knowledge(SCK) is one of six categories in MKT. SCK is a knowledge base, useful especially for math teachers to analyze errors, evaluate alternative ideas, give mathematical explanations and use mathematical representation. The purpose of this study is to analyze the elementary teacher`s SCK. 29 six graders made word problems with respect to division fraction 9/10÷2/5. These word problems were classified four sentence types based on Sinicrope. Mick & Kolb(2002) and then representative four sentence types were given to 10 teachers who have taught six graders. Data analysis was conducted through the teachers` evaluation of the answers(word problems) and revision of students` mathematical errors. This study showed how to know meanings of fraction division for effective teaching. Moreover, it suggested several implications to develop SCK for teaching and learning.

빅데이터를 활용한 유보통합 관련 사회적 담론 의미 분석

강영란(Young-Ran Kang),김숙령(Sook Ryong Kim) 한국산학기술학회 2023 한국산학기술학회논문지 Vol.24 No.9

본 연구는 유보통합 정책 수립의 기초 자료로 제공하는데 목적이 있다. 이에 유보통합 사회적 담론 의미 분석을 위해 빅데이터 Textom의 원자료(rawdata)를 수집, 분석하였다. ‘유보통합’ 키워드를 중심으로 3구간으로 나누어 추출한 원자료는 1차, 2차 정제과정을 거쳐 최종 상위 500개의 키워드를 중심으로 30×30 일원모드 매트릭스 데이터 셋(1-mode Matrix)으로 구축되었다. 분석 결과는 다음과 같다. 첫째, 빈도분석 상위 3위 키워드 1·2구간에서는 유보통합, 자격증취득, 보육교사, 3구간은 유보통합, 보육교사, 보육교사자격증 순으로 도출되었다. 둘째, 중심성 분석에서 가장 높은 허브 역할 키워드는 1·2구간은 자격증 취득, 핵심키워드는 보육교사로 나타났다. 3구간의 허브키워드는 유보통합, 핵심키워드는 학점은행, 유아교육대학으로 도출되었다. 결과는 유보통합의 효율성과 타당성의 지속적 점검을 토대로 행정적, 재정적 합의점이 실효성을 거둘 수 있어야 함과 이해관계자들의 득실이 아닌 영유아의 건강한 발달을 위한 질높은 보육 제공에 초점을 두어야 함을 제언한다. This study provides basic data for establishing Childcare Center and Kindergarten policies. Therefore, the raw data of big data Textom was collected and analyzed to determine the meaning of social discourse on the unification of daycare centers and kindergartens. The original data extracted by dividing into three sections centered on the keyword Unification of Childcare Center and Kindergarten are constructed as a 30×30 one-mode matrix data set centering on the final top 500 keywords through the first and second refinement processes. First, in the top three keywords of frequency analysis, in the 1st and 2nd sections, the Unification of Childcare Center and Kindergarten, acquisition of the license, and childcare teachers, and in section 3, the Unification of Childcare Center and Kindergarten, childcare teachers, and childcare teacher certification were derived. Second, in centrality analysis, the highest hub role keyword was certification acquisition in sections 1 and 2, and the core keyword was childcare teacher. The hub keyword of the 3rd section appeared as the Unification of Childcare Center and Kindergarten, and the core keywords were derived as credit bank and early childhood education college. The results suggest that administrative and financial agreements should be effective based on a continuous inspection of the efficiency and feasibility of the Unification of Childcare Centers and Kindergartens and that the focus should be on providing high-quality child care for the healthy development of infants and young children, not the gains and losses of stakeholders.

관상동맥 중재술을 받은 환자에서 실로스타졸 사용 후 동맥경직도의 변화

조상영 ( Sang Young Cho ),김계환 ( Kye Hwan Kim ),안종화 ( Jong Hwa Ahn ),강영란 ( Young Ran Kang ),고진신 ( Jin Sin Koh ),황석재 ( Seok Jae Hwang ),박용휘 ( Yongwhi Park ),정영훈 ( Young Hoon Jeong ),곽충환 ( Choong Hwan Kwak 대한내과학회 2015 대한내과학회지 Vol.89 No.3

Background/Aims: Increased arterial stiffness is a well-known risk factor for cardiovascular disease. Cilostazol, a phosphodiesterase type 3 inhibitor, is a unique antiplatelet agent with vasodilatory and vasoprotective effects. Therefore, we hypothesized that cilostazol may affect arterial stiffness. Methods: We enrolled 161 patients (112 males; mean age, 63 years) who had undergone percutaneous coronary intervention (PCI) for ischemic heart disease. The brachial-ankle pulse wave velocity (baPWV), radial augmentation index (rAI), rAI adjusted for a heart rate of 75 beats/min (rAI75), central systolic blood pressure (cSBP), and central pulse pressure (cPP), were measured at baseline and at the 30-day follow-up. Parameter changes were compared between the cilostazol group (n = 51) and the control group (n = 110). Results: In the cilostazol group, the values for rAI, cSBP, and cPP all improved after 30 days, while the control group displayed no significant interval changes in these parameters. The changes in rAI75 and baPWV did not differ significantly between the two groups. The changes in rAI, cSBP, and cPP were related to brachial systolic blood pressure, brachial diastolic blood pressure, heart rate, and the use of cilostazol and beta-blockers. In a multivariate analysis, the use of cilostazol was identified an independent factor associated with changes in rAI, cSBP, and cPP. Conclusions: The addition of cilostazol to conventional antiplatelet therapy in patients undergoing PCI may be associated with improvements in rAI, cSBP, and cPP, but not in rAI75 or baPWV. Therefore, the effects of cilostazol might be related to an increased heart rate. (Korean J Med 2015;89:295-304)

관상동맥 컴퓨터 단층 촬영술과 운동부하 심전도 검사의 실제임상에서의 검사 정확도 비교

윤성은 ( Seong Eun Yun ),강영란 ( Young Ran Kang ),김계환 ( Kye Hwan Kim ),최영민 ( Young Min Choi ),최정우 ( Jung Woo Choi ),고진신 ( Jin Sin Koh ),박정랑 ( Jeong Rang Park ),박용휘 ( Yong Whi Park ),황석재 ( Seok Jae Hwang ) 대한내과학회 2014 대한내과학회지 Vol.87 No.2

Background/Aims: The exercise ECG test (XECG) and computed tomography coronary angiography (CTCA) have been used widely in initial evaluations of coronary artery disease (CAD) in real-world practice. In this study, we compared the diagnostic power of CTCA and XECG, based on conventional coronary angiography (CCA). Methods: We enrolled 589 consecutive patients retrospectively who had been examined with both XECG and CTCA for the evaluation of CAD in outpatient clinics. Significant stenosis was defined as more than 50% diameter stenosis. Triage to CCA and/or revascularization treatment (RT) by the results of XECG and CTCA and the diagnostic accuracy of both exams, based on CCA, were investigated. Results: In the 589 patients, 107 (19%) were triaged to CCA for further evaluation; in 77 (12.8%) significant stenosis was detected on CCA. Also, 65 (11%) patients underwent RT. In the CTCA results, 120 patients had significant stenosis. Of them, 58 (48%) and 75 (62%) patients were triaged to RT and CCA, respectively. Based on the XECG, 115 positive patients were triaged to RT and CCA (23 [20%]/41 [35%]). Among 107 patients with CCA, the sensitivity, specificity, positive predictive value, and negativ e predictive value for significant stenosis on CCA of CTCA were 89.9%, 74.0%, 90.6%, and 71.4%, respectively, and those of XECG were 50.0, 67.9, 78.0, and 37.3, respectively. The kappa value of CCA and CTCA was 0.62 (p < 0.001) and that of CCA and XECG was 0.145 (p = 0.113). Conclusions: In real-world practice, CCA was decided on more frequently, based on CTCA. CTCA showed better diagnostic accuracy than XECG. (Korean J Med 2014;87:165-172)

불명열로 내원한 대동맥 박리증

최수녕 ( Su Nyoung Choi ),박성지 ( Sung Ji Park ),권태정 ( Tae Jung Kwon ),강영란 ( Young Ran Kang ),박소라 ( So Ra Park ),곽충환 ( Chung Whan Kwak ),황진용 ( Jin Yong Hwang ) 대한내과학회 2006 대한내과학회지 Vol.70 No.2

안정형 협심증과 급성 관상동맥 증후군 환자에서 경동맥의 재형성

박정랑 ( Jeong Rang Park ),권태정 ( Tae Jung Kwon ),강영란 ( Young Ran Kang ),박소라 ( So Ra Park ),고진신 ( Jin Sin Kho ),임성일 ( Sung Il Im ),박성지 ( Sung Ji Park ),곽충환 ( Chung Hwan Kwak ),황진용 ( Jin Yong Hwang ) 대한내과학회 2006 대한내과학회지 Vol.71 No.3

Background: Acute adaptive vascular remodeling occurs in active and unstable inflammatory plaques. It has been suggested that the adaptive coronary vascular remodeling, in patients with acute coronary syndrome (ACS), may be systemic and may show similar vascular remodeling in the carotid arteries. We investigated the ultrasonographic features of the common carotid artery (CCA) to determine whether the arterial expansive remodeling found in the coronary artery occurs in the carotid arteries of patients with ACS. Methods: We measured lumen diameter (LD), interadventitial diameter (IAD) and intima media thickness (IMT) using a B-mode ultrasound in both common carotid arteries in patients with ACS (N=74) and chronic stable angina (CSA) (N=31). Positive remodeling was arbitrarily defined as an IMTmax>1 mm and IAD>8 mm and negative remodeling as an IMTmax>1 mm and IAD<7 mm. Other values were defined as no remodeling. Results: There were no significant differences in LD IAD and maximal IMT of the right CCA and the left CCA in comparisons between the ACS and the CSA patient groups. There were no differences for number of cases with no remodeling or differences in positive and negative remodeling in the right common carotid artery and left common carotid artery in comparisons between the ACS and CSA patient groups. . Presence of plaque in both common carotid arteries showed similar frequency in the ACS and CSA patient groups. The characteristics of carotid artery plaques were not different in the two groups. The remodeling index (IAD/LD) was correlated with IMTmax (right CCA r=0.797, p<0.001; left CCA r=0.860, p<0.001). Conclusions: The common carotid arterial structure of ACS patients was not different from that of CSA patients. Therefore, these results suggest that the expansive arterial remodeling, due to coronary inflammatory plaques, appears to take place locally rather than systemically.(Korean J Med 71:266-275, 2006)

64열 다중검출 CT를 이용한 관상동맥 스텐트재협착의 평가

서명기 ( Myung Ki Seo ),고진신 ( Jin Shin Kho ),박소라 ( So Ra Park ),강영란 ( Young Ran Kwang ),강민경 ( Min Kyeng Kang ),조정현 ( Jung Hyun Cho ),안연정 ( Youn Jung An ),최봉룡 ( Bong Ryong Choi ),정영훈 ( Young Hoon Jeong ) 대한내과학회 2009 대한내과학회지 Vol.76 No.4

Background/Aims: Multidetector computed tomography (MDCT) is considered to be a noninvasive, alternative method for evaluating stent restenosis. However, the diagnostic accuracy of 16-channel MDCT for stent stenosis is reported to have severe limitations because of high-attenuation stent-related artifacts. 64-channel MDCT, which recently became available in clinical practice, has better spatial and temporal resolution than 16-channel MDCT. The diagnostic accuracy of 64-channel MDCT for stent restenosis (in-segment and in-stent) was assessed by comparing it with conventional coronary angiography. Methods: In-segment and in-stent restenosis (≥50% in diameter) were evaluated in 96 stent segments in 68 patients [61±12 years, 51 (75%) male] using both 64-channel MDCT and conventional coronary angiography. The in-stent analysis was confined to the portion of the artery covered by the stent and the in-segment analysis included the stent and 5 mm proximal or distal to the stent edges. Results: The 64-channel MDCT could evaluate stent restenosis in 93 of 96 (97%) stent segments. Quantitative conventional coronary angiography found in-segment restenosis (≥50% in diameter) in 16 of 68 (23%) patients and 16 of 96 (17%) segments. For the patients with interpretable stent segments, the sensitivity, specificity, positive predictive value, and negative predictive value of 64-channel MDCT for in-segment restenosis per patient were 63, 96, 83, and 89%, respectively; per segment they were 63, 97, 83, and 93%, respectively; and for in-stent restenosis per stent they were 82, 98, 82, and 98%, respectively. Conclusions: The diagnostic accuracy of 64-channel MDCT for assessing stent restenosis had high specificity and negative predictive value in the clinical setting. The 64-channel MDCT may be a promising, less-invasive imaging tool for stent restenosis, especially for the purpose of excluding stent restenosis. (Korean J Med 76:434-442, 2009)