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고등학교 1학년 수학 교과서에 나타난 수학 외적 연결성
조수미(Su Mi Jo),신인선(In Sun Shin) 학습자중심교과교육학회 2021 학습자중심교과교육연구 Vol.21 No.3
본 연구에서는 2015 개정 교육과정에 따른 고등학교 1학년 수학 교과서에서 나타난 수학 외적 연결성 유형을 분석 대상의 연결 소재 및 문제 상황에 따라 맥락과의 연결과 타 교과와의 연결로 나누어 분석하였다. 이를 통하여 학교 수학교실에서 교과 서의 활용으로 창의･융합 능력의 신장을 가능하도록 하는 소재 및 문제 상황을 제시 하는 수학 교과서의 개발에 대한 시사점을 도출하는 데에 목적이 있다. 2015 개정 교육과정에 따라 2018년 발간된 고등학교 1학년 수학 교과 9종 모두를 수집하여 교과서 내용 전체의 소재와 문제를 대상으로 수학 외적 연결성을 분석하였다. 그 결과, 모든 교과서에서 맥락과의 연결 유형이 타 교과와의 연결 유형보다 많이 나타났으며, 대부분 단원에서 맥락과의 연결 유형은 실생활 맥락과의 연결이 높게 나타났다. 타 교과 와의 연결 유형은 과학/기술 가정 교과와의 연결에 치우쳐 있었다. 이러한 치우침을 개선할 수 있도록 수학교과서에서 다양한 맥락과 교과와의 연결을 제시한다면 수학 교실에서 창의･융합 능력을 신장시킬 수 있으리라 기대된다. In this study, the types of external connections that appeared in tenth graders mathematics textbooks according to the 2015 revised curriculum were analyzed by dividing them into connection with context and connection with other subjects. Through this, the purpose is to derive implications for the development of a mathematics textbook that presents the subject matter and problem situations that enable the improvement of creativity and convergence ability through the use of the textbook in the school mathematics classroom. In accordance with the 2015 revised curriculum, all nine types of mathematics subjects for the first year of high school published in 2018 were collected, and the external connection of mathematics was analyzed for the subject matter and problem of the entire textbook.. As a result of analyzing all 9 mathematics textbooks, the type of connection with context appeared more in all textbooks than the type of connection with other subjects, and in most units, the type of connection with context was real life. The type of connection with other subjects was biased toward the connection with science/technology home economics. If the mathematics textbook presents connections between various contexts and subjects in order to improve this bias, it is expected that in the mathematics classroom it will be able to enhance creativity and convergence ability.
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닭 도계 및 가공공정 중 유해미생물의 분포와 항생제 감수성
설국환(Kuk-Hwan Seol),김기현(Ki Hyun Kim),조수미(Su-Mi Jo),김영화(Young Hwa Kim),김현욱(Hyun-Wook Kim),함준상(Jun-Sang Ham) 충남대학교 농업과학연구소 2015 농업과학연구 Vol.42 No.1
This study was performed to analyze the distribution and antimicrobial resistance of pathogenic microorganisms isolated from the carcass and environments of chicken processing plant located in Gyeonggi province from October to November in 2010. Chicken slaughterhouse was visited 3 times and totally 40 samples were collected from chicken carcass before and after washing (n=14), chicken cuts (n=7), cooling water (n=8), brine (n=2), cutting knives (n=7) and working plate (n=2). Whole-chicken rinsing technique (for chicken carcasses) and swab technique (for working plate and knives) were used to analyze the distribution of pathogenic microorganisms. In addition, brine and chilling water from storage tanks were gathered using sterilized tubes and used as samples. The matrix-assisted laser desorption/ionization mass spectrometry (MALDI MS) for whole cell fingerprinting in combination with a dedicated bioinformatic software tool was used to identify the isolated microorganisms. The pathogenic microorganisms, such as Bacillus cereus (n=8) and Staphylococcus aureus (n=9), were isolated form the chicken processing process (chicken carcasses of before and after chilling, chicken cuts, and working plate). The antimicrobial susceptibility of those isolated microorganisms was analyzed using 21 antimicrobial agents. In the case of B. cereus, it showed 100% of resistance to subclasses of penicillins and peptides, and it also resistant to cephalothin, a member of critically important antimicrobials (CIA), however there was no resistance (100% susceptible) to vancomycin and chloramphenicol. S. aureus showed 100% resistance to subclasses of peptides and some of penicillins (penicillin and oxacillin), however, it showed 100% susceptibility to cephalosporins (cefazolin and cephalothin). All of the tested pathogens showed multi drug resistance (MDR) more than 4 subclasses and one of B. cereus and S. aureus showed resistance to 9 subclasses. After the ban on using the antimicrobials in animal feed in July 2011, there would be some change in microbial distribution and antimicrobial resistance, and it still has a need to be analyzed.
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Mg-xSn(x = 1, 3, 5, 7, 9 wt.%) 합금의 미세조직 및 부식특성
강용묵 ( Yong Muk Kang ),김상현 ( Sang Hyun Kim ),조수미 ( Su Mi Jo ),박경철 ( Kyung Chul Park ),김병호 ( Byeong Ho Kim ),박익민 ( Ik Min Park ),박용호 ( Yong Ho Park ) 한국주조공학회 2011 한국주조공학회지 Vol.31 No.6
In the present work, the corrosion properties of Mg-xSn (x = 1, 3, 5, 7 and 9 wt.%) alloys have been investigated. Potentiodynamic polarization and immersion tests were carried out in 3.5% NaCl solution of pH 7.2 at room temperature to measure the corrosion properties of Mg-xSn (x = 1, 3, 5, 7 and 9 wt.%) alloys. With increase of the Sn contents, the volume fraction of the Mg2Sn phase was increased. The corrosion rate of Mg-xSn alloys was increased up to 7 wt.%Sn and decreased above 9 wt.%Sn. Initiation of galvanic site during immersion mainly occurred at Mg/Mg2Sn interface and propagation went into α-Mg. For this reason, corrosion properties of Mg-xSn (added from 1 wt.%Sn to 7 wt.%Sn alloys) alloys are decreased because the galvanic site was increased with increasing Sn addition. In Mg-9wt.%Sn alloy, however, the corrosion site were changed from Mg/Mg2Sn interface to α-Mg/M2Sng interface in lamellar structure. Preferentially corrosion of α-Mg/M2Sn interface in lamellar structure impeded corrosion propagation went into α-Mg.
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