통계적 문제해결 과정에서 예비 수학교사들의 탐구 질문 분석

김소형 ( Kim¸ Sohyung ),한선영 ( Han¸ Sunyoung ) 한국수학교육학회 2021 수학교육 Vol.60 No.3

통계를 의미 있게 학습하기 위해서는 실제 데이터로 통계적 문제해결을 경험할 수 있는 기회를 제공해야 한다. 특히 문제 설정 단계에서의 탐구 질문은 학생들이 통계적 문제해결 과정의 시작부터 결론까지 성공적으로 안내하는 데에 중요하다. 이에 본 연구는 문제 설정 단계에서 예비 수학교사들의 탐구 질문에 대해 혼합연구방법을 실시하였다. 그 결과 일부 예비 수학교사들은 통계적 질문을 분류하는 과정에서 질문의 의미나 변수가 명확하지 않거나 통계 지식에 대한 오개념으로 인하여 통계적으로 해결할 수 없는 질문을 분류하였다. 또한 예비 수학교사들의 50%만이 통계적 문제해결에 적합한 6가지 조건을 모두 충족시켰으며, 나머지 50%는 일부 조건만 충족시켰다. 따라서 이러한 결과는 예비 수학교사들에게 교사 교육을 통해 통계적 문제해결 과정을 경험할 수 있는 기회를 제공해야하며, 그 중 문제 설정 단계는 매우 중요하므로 문제 설정 단계도 일련의 세분화된 과정이 필요하다는 점을 제안할 수 있다. To learn statistics meaningfully, we must provide an opportunity to experience the process of solving statistical problems with actual data. In particular, exploration questions at the problem setting stage are important for students to successfully guide them from the beginning to the conclusion of the statistical problem solving process. Therefore, in this study, a mixed research method was carried out for the exploration questions of pre-service mathematics teachers during the problem setting stage. As a result, some pre-service mathematics teachers categorized incorrect statistical questions because they did not clearly define the meaning or variables of the questions in the process of categorizing them from possible questions. In addition, questions that cannot be solved statistically were categorized due to misconceptions about statistical knowledge. Second, only 50% of the pre-service mathematics teachers met all 6 conditions suitable for solving statistical problems, while there maining they met only a few conditions. Therefore, the conclusion of this study is as follows. First of all, they should be given the opportunity to experience all the statistical problem solving processes through teacher education because they do not have enough experience in statistical problem solving. Secondly, since the problem setting stage is very important in the statistical problem solving process, a series of subdivided processes are also required in the problem setting stage.

수업 설계 및 실연의 자기평가 기준에 대한 고찰

김소형 ( Sohyung Kim ),김용석 ( Yongseok Kim ),한선영 ( Sunyoung Han ) 한국수학교육학회 2016 수학교육 Vol.55 No.2

As teachers’ competency is evaluated based on their teaching performance. pre-service teachers need to have an opportunity to reflect on themselves by systematically analyzing and evaluating their own lesson planning and teaching performance through self-assessment. In this study, we aimed to examine what evaluation criteria for lesson planning and teaching performance pre-service mathematics teachers consider in the process of self-assessment. This study used a mixed-methods research design. To draw the self-evaluation criteria for lesson planning and teaching performance, pre-service self-reported assessments were analyzed using qualitative analyses. In addition, descriptive statistics were used to investigate the pre-service teachers’ distribution across the criteria and check the ratio of pre-service mathematics teachers for each element. As a result, it was disclosed that pre-service mathematics teachers considered eight elements in self evaluating their own lesson planning and teaching performance. In addition, we found that pre-service mathematics teachers tended to consider Pedagogical Content Knowledge (PCK) more than Subject-Matter Knowledge (SMK). Moreover, the results of this study provide educational implications for the curriculum in the pre-service teacher’s education program.

Straightness and flatness evaluation using data envelopment analysis

Cho, Sohyung,Kim, Joon-Young Springer-Verlag 2012 INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TE Vol.63 No.5

PEMFC 고분자막 내구 평가를 위한 Fenton 반응에서 과산화수소 농도 변화에 관한 연구

오소형 ( Sohyung Oh ),김정재 ( Jeongjae Kim ),이대웅 ( Daewoong Lee ),박권필 ( Kwonpil Park ) 한국화학공학회 2018 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.56 No.3

고분자전해질연료전지(PEMFC)의 고분자막 전기화학적 내구성을 셀 밖에서 평가하는 방법으로 펜톤(Fenton)반응이 많이 이용된다. 본 연구에서는 펜톤 반응에 영향을 주는 인자를 파악하고자 하였다. 반응진행도를 파악하기 위해 펜톤 반응에서는 생성물로서 라디칼을 분석해야 하는데, 라디칼을 분석하기 어려워 반응물인 과산화수소 농도를 분석해 반응진행도를 측정하였다. 온도에 따른 과산화수소 변화속도를 측정해 활성화 에너지를 계산한 결과 180분에서 24.9 kJ/mol이었다. 펜톤반응 속도는 철이온 농도에 많은 영향을 받았다. 80 ℃, 200 rpm, Fe²⁺ 80 ppm 조건에서는 1시간동안에도 과산화수소 농도가 20%이상 처음과 차이가 나므로 용액교체를 자주 하는 것이 막열화 속도를 증가시킴을 보였다. Fenton reaction is widely used as a out of cell method for evaluating the membrane electrochemical durability of Proton Exchange Fuel Cell (PEMFC). In this study, we investigated the factors affecting the Fenton reaction. In order to estimate the degree of the reaction, it is necessary to analyze the radicals as a product in the Fenton reaction. However, since the radicals are difficult to analyze, the degree of the reaction was measured by analyzing the concentration of hydrogen peroxide. The activation energy was calculated from the rate of hydrogen peroxide change with temperature. The activation energy was 24.9 kJ/mol at 180 min. The Fenton reaction rate was affected by the iron ion concentration. At 80 ℃, 200 rpm, and Fe²⁺ 80 ppm, the concentration of hydrogen peroxide was decreased more than 20% even for 1 hour, which shows that frequent solution replacement increases the membrane degradation rate.

PEMFC의 고분자막에서 지지체가 고분자전해질 막 성능 및 전기화학적 내구성에 미치는 영향

오소형 ( Sohyung Oh ),임대현 ( Dae Hyun Lim ),이대웅 ( Daewoong Lee ),박권필 ( Kwonpil Park ) 한국화학공학회 2020 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.58 No.4

고분자전해질 연료전지의 기계적 내구성을 높이기 위해 고분자막에 지지체를 넣은 강화막이 사용되고 있다. 지지체는 주로 e-PTFE를 사용하는데 소수성이고 이온전달이 안되므로 성능저하의 원인이 될 수 있다. 그래서 본 연구에서는 e-PTFE 지지체가 PEMFC 성능과 전기화학적 내구성 미치는 영향에 대해 연구하였다. 본연구에서는 지지체가 들어간 강화막과 들어가지 않은 단일막(비강화막)을 비교하였는데, 지지체의 소수성 때문에 강화막의 물 확산계수가 단일막보다 낮았다. 강화막은 물확산 계수가 낮아 이온의 막 이동 저항이 단일막보다 높았다. 지지체의 낮은 수소투과도 때문에 강화막의 OCV가 단일막보다 높았다. 지지체가 수소투과도를 감소시킴으로서 라디칼 발생속도를 감소시켜 강화막의 전기화학적 내구성도 향상시킴을 보였다. To increase the mechanical durability of the proton exchange membrane fuel cells, a reinforced membrane in which a support is placed in the polymer membrane is used. The support mainly uses e-PTFE, which is hydrophobic and does not transfer ions, which may cause performance degradation. In this study, we investigated the effect of e-PTFE support on PEMFC performance and electrochemical durability. In this study, the reinforced membrane with the support was compared with the single membrane (non-reinforced membrane). Due to the hydrophobicity of the support, the water diffusion coefficient of the reinforced membrane was lower than that of the single membrane. The reinforced membrane had a lower water diffusion coefficient, resulting in higher HFR, which is the membrane migration resistance of ions, than that of a single membrane. Due to the low hydrogen permeability of the support, the OCV of the reinforced membrane was higher than that of the single membrane. The support was shown to reduce the hydrogen permeability, thereby reducing the rate of radical generation, thereby improving the electrochemical durability of the reinforced membrane.

통합예술치료 국내 연구동향 분석

김소형(Kim Sohyung) 한국문화융합학회 2021 문화와 융합 Vol.43 No.5

This study investigates the research trends in Integrative Arts Therapy over the past 10 years. To this end, a total of 164 papers, comprising 59 scholarly journal papers and 105 master and doctoral theses published from January 2011 to December 2020 were analyzed. The results revealed that research on Integrative Arts Therapy over the past 10 years grew until 2017 and has decreased since then. The mixed method research approach was the most utilized (n=83, 50.30%), followed by quantitative (n=42, 25.45%) and qualitative methods (n=40, 24.24%). Regarding the study type, 102 experimental studies (61.82%), 30 case studies (18.18%), 11 developmental studies (6.67%), 11 literature review studies (6.67%), and 9 phenomenological studies (5.45%) were identified. As for the subject, 11 studies (6.67%) were literature reviews, and 154 (93.33%) were human subject research. Among the human subject research, 84 (54.55%) were for mixed gender, 52 (33.77%) were for women only, and 6 (3.90%) were for men only. This study is significant in that it presents basic data for the development of research on Integrative Arts Therapy.

대학생 대상 국내 예술치료 연구 동향

김소형(Kim Sohyung) 한국문화융합학회 2021 문화와 융합 Vol.43 No.8

이 연구는 대학생 대상의 국내 예술치료 연구 동향을 살펴보고 향후 발전 방향을 모색하는데 목적을 둔다. 이를 위하여 2011년부터 2020까지 발표된 학술지 논문 52편, 석사학위 논문 46편, 박사학위 논문 14편 총 112편을연구 문제에 따라 양적 질적 혼합연구 방법으로 분석하였다. 연도별 동향을 살펴보면, 지난 10년 동안 대학생 대상의 국내 예술치료 연구는 2011년 6편(5.36%)을 시작으로2018년에 최대 19편(16.96%)까지 급격하게 증가 추세가 나타난 후 2년 동안 감소 추세를 보였다. 예술치료의 연구 분야를 분석해본 결과, 미술치료 연구가 69편(61.61%)으로 양적인 우세를 보였다. 연구 유형별 동향은 과정 성과연구가 104편(92.86%)으로 양적인 우세 현상을 보였으며 프로그램 개발연구는 2편(1.79%) 발표되었다. 연구 방법별 동향으로는 혼합연구가 56편(50.00%)으로 가장 많이 이루어졌다. 연구 대상의 성별 분석으로는 남 여 혼합연구가 73편(67.59%)으로 가장 우세하게 나타났으며 대상자가 11~20명인 연구가 47편(43.52%), 2~10명인 연구가24편(22.22%) 순으로 발표되었다. 이 연구는 국내 예술치료 분야에 기초자료를 제공하였음에 의의를 둔다. This study investigates the research trends in Arts Therapy for the college students over the past 10 years. To this end, a total of 112 papers, comprising 52 scholarly journal papers and 60 master and doctoral theses published from January 2011 to December 2020 were analyzed. Arts Therapy research for the College students started with 6 articles (5.36%) in 2011 and showed a sharp increase trend to a maximum of 19 (16.96%) in 2018, followed by a decreasing trend for two years. Art Therapy research was the most utilized (n=69, 61.61%). As for the trend by research type, process/performance research showed a quantitative preponderance,(n=104, 92.86%) and 2 (1.79%) of development of Arts Therapy program were published. The mixed method research approach was the most utilized (n=56, 50.00%). As for the gender analysis of the research, 73 (67.59%) were mixed studies, 47 (43.52%) with 11 to 20 subjects, and 24 (22.22%) with 2 to 10 subjects were announced. This study is significant in that it provided basic data for Korean Arts Therapy research.

Synthesis of Novel Rubusoside Galactoside by Using Commercial β-Galactoside from Bacillus circulans and Its Biochemical Properties

Thi Nga Pham,Sohyung Kwak,Thi Thanh Hanh Nguyen,Doman Kim 한국식품영양학회 2021 한국식품영양학회 학술대회논문집(학술심포지움) Vol.2021 No.11

Measuring RFID Adoption Factors with Cognitive Styles : A Preliminary Examination of Consumers’ Perceptions

Se Hun Lim,Sohyung Kim,Namjae Cho,Daekil Kim 한국데이타베이스학회 2010 Journal of information technology applications & m Vol.17 No.3

The Radio Frequency IDentification (RFID), once used widely, is expected to provide improved convenience in our everyday life. Crude observations of RFID consumption show that there is a wide variation in the adoption of this technology across different individuals. One plausible explanation is that consumers with challenging mind who seek for new technologies and have a good grasp of the new RFID technology should have higher propensity to use the technology. A better understanding of such acceptance pattern of RFID is of high importance in establishing technology providers’ marketing strategies. This study is aimed to explain differences in the level of RFID acceptance focusing on cognitive styles of potential RFID users. By presenting potential RFID users’ discriminative propensity toward RFID technology, this study hopes to provide guidelines for the design of service strategies that facilitate consumers’ acceptance of RFID.

Development of the Hovering AUV test-bed and field test

Choi, Hyeung-Sik,Cho, Sohyung,Kim, Joon-Young Korean Society of Ocean Engineers 2016 Journal of advanced research in ocean engineering Vol.2 No.1

This paper describes the design and performance of a hovering AUV constructed at KMOU (Korea Maritime and Ocean University). Before the field test, we analyzed the dynamic performance of the AUV using a simulation program made by Matlab & Simulink. Also, a PID controller was designed to control the thrusters. Using 4 thrusters (2 vertical and 2 horizontal), the AUV could be controlled using dynamic motion with 4-DOF. A simulation and field test were conducted with way-point tracking, maintaining the desired depth. To perform way-point tracking, the AUV can be fine-tuned to the desired heading angle through the LOS (Line Of Sight) method. This paper shows the results of simulation and field tests.