건축용 난연 목재 개발에 대한 실험 연구

서현정,김남균,조정민,이민철,Seo, Hyun Jeong,Kim, Nam Kyun,Jo, Jeong Min,Lee, Min Chul 한국안전학회 2017 한국안전학회지 Vol.32 No.5

This study investigates fire-retardant performances and combustion/thermal characteristics of fire-retardant treated wood by comparing them with those of fire-retardant untreated wood from the expreimental resutls of cone calorimeter and thermo-gravimetric(TG) analyzer. Hazardousness of combustion product gases for fire-retardant treated wood and untreasted wood were also observed from the results of internal finish material incombustibility test according to the Korea standard code of KS F 2271. In this study, we also tried to improve the fire retardant performance of wood by applying fire-retardant chemical composites, and to secure the fire safety performance in buildings. Red pine (Pinus densiflora) was selected as a test specimen because it is mostly used as a building material in Korea. Fire retardant chemical composites (FRCs) were prepared by mixing boron, phosphorous, and nitrogen species and treated by press-impregnation method. Water-based FRCs were composed of 3% boric acid($H_3BO_3$), 3% borax decahydrate($Na_2B_4O_7$), 8% ammonium carbonate($(NH_4)_2CO_3$), diammonium phosphate ($(NH_4)_2HPO_4$) varied from 10-30% and potassium carbonate($K_2CO_3$) varied from 10-30%. From the test results of cone calorimeter, TG analysis and gas hazard assessments, newly proposed were the optimal composition and production methods of FRCs which can sufficiently meet fire-retardant level 3 based on Korea law of construction. Thus, the FRCs, developed in this study, are anticipated to contribute to the improvement of fire safety and widespread of usage in wood as building materials.

전기공사 현장 안전관리자의 직무자원, 직무요구 및 조직몰입의 영향 연구

서현정,김남균,손민지,홍아정,Seo, Hyun Jeong,Kim, Nam Kyun,Son, Minjie,Hong, Ah-Jeong 한국안전학회 2021 한국안전학회지 Vol.36 No.2

This study was conducted to suggest a direction in which safety managers can concentrate on industrial accident prevention and safety management for the organization. The job resources of safety managers were divided into organizational and individual levels, and the magnitude of the impact on organizational commitment was compared. Furthermore, job demands were classified into environmental risk factors and personal psychological factors to confirm their effect on organizational commitment. The moderating effect of job resources and sub-factors of the variable in the relationship between job demands and organizational commitment was verified. In this study, a questionnaire survey was conducted on 193 safety managers in the domestic electric construction business, data were collected, and a questionnaire of 180 people was used for the final analysis. Based on the results, organization-level resources among the sub-factors of job resources and individual psychological factors among the sub-factors of job demand had a more significant influence on organizational commitment. In the relationship between job resources and organizational commitment, the moderating effect of job demand was verified, confirming that job demand had a negative moderating effect. Individual psychological factors had a modulating effect, whereas environmental factors did not. The significance, implications, and limitations of this study are discussed based on the research results.

안전리더십 연구에 대한 체계적 문헌고찰

서현정,홍아정,Seo, Hyun Jeong,Hong, Ah-Jeong 한국안전학회 2020 한국안전학회지 Vol.35 No.6

In order to establish a conceptual basis and future research direction of safety leadership, this study reviewed domestic and foreign research trends related to safety leadership through systematic literature review methods. The literature search was conducted by combining terms related to safety leadership without limiting the period databases. A total of 195 documents were found, of which the final 59 were used for analysis. As a results, the safety leadership study was the most frequent in relations among variables. The most leadership types were based on transactional leadership and transformational leadership. In addition, studies have been conducted to categorize safety leadership as an independent concept. Safety leadership was mainly studied in the fields of safety engineering, disaster prevention, and business administration. Quantitative studies were mainly conducted to research methods. Based on the results, the research trend related to safety leadership was discussed, and suggestions for future research direction was presented.

난연처리 국산 침엽수재의 연소특성 분석

서현정(Hyun Jeong Seo),황욱(Wuk Hwang),이민철(Min Chul Lee) 한국연소학회 2017 한국연소학회지 Vol.22 No.2

In this study, we measured that fire characteristics of four wood species using indoor finish materials. Wooden specimens were treated with fire retardant chemicals such as diammonium phosphate and potassium carbonate. The wooden specimens are Larix kaempferi, Pinus koraiensis, Cryptomeria japonica, and Chamaecyparis obtusa, which are used for indoor finish. The heat release rate (HRR) values of fire retardant treated woods were confirmed lower than that of untreated woods. For specific details, the HRR values of vacuum impregnated specimens for Pinus koraiensis and Cryptomeria japonica were measured lower than coatings. However, those of Larix kaempferi and Chamaecyparis obtusa showed the opposite effect to it. Total heat release rate values of all wooden specimens, vacuum impregnated were lower than coated specimens.

STEAM 기반 교육 프로그램이 과학 영재들의 창의적 사고와 STEAM 수업에 대한 인식에 미치는 효과

서현정 ( Hyun-jung Seo ),한화정 ( Hwa-jung Han ),심규철 ( Kew-cheol Shim ) 한국생물교육학회 2021 생물교육 Vol.49 No.2

The purpose of this study was to investigate the effects of STEAM-based educational program on the creative thinking of scientifically gifted students and the perception of STEAM instruction. The STEAM-based educational program consisted of three themes which were considered real life for scientifically gifted students : Designing a biometric security system, making polarized sunglasses, and making vitamin C drinks. The STEAM-based educational programs were carried out for 12 lesson hours for 20 scientifically gifted students, who were the 7th graders. In order to investigate the effects of the program, the pre-post test of their creative thinking was conducted, and their perception of the instruction using the STEAM-based program was surveyed. As a result, STEAM-based educational program has affected positively on the divergent thinking and associative thinking. In addition, scientifically gifted students have the positive perception of the instruction using the STEAM-based educational program. The STEAM-based educational program has a potential of science gifted education to improve their creative thinking.

공공언어 정확성 진단 기준에 대한 비판적 검토 및 제언

서현정 ( Seo Hyunjung ),김슬옹 ( Kim Seulong ) 한국공공언어학회 2019 공공언어학 Vol.2 No.0

The purpose of this study is to review and provide the diagnostic criteria on ‘correctness’, one of the two diagnostic criteria which are ‘mutual intelligibility’ and ‘correctness’, on the guidelines of public language policy enacted by Basic Act of Korean National language. The major recommendations proposed in this paper are as follows. First, with regard to correctness in the diagnostic criteria of public language, the hierarchy of ‘mutual intelligibility’ and ‘correctness’ of language should be consistently presented. Second, the word ‘Dallak(단락)’, which is translated to ‘paragraph’ in English should be changed to ‘Mundan(문단)’, which is also translated to ‘paragraph’, as used in textbooks. Regarding paragraph writing, detailed instructions on ‘indentation’ and ‘letter-spacing’ should be carefully considered. Third, a certain degree of accuracy in public language needs to be embodied. Ambiguous requirements should also be considered for further discussion. Fourth, with regard to translationese, that is awkward uses of language in translated texts which are hardly found in non-translated texts, case-by-case studies and clear requirements are inevitably necessary. In addition, strong regulations against the violation of standard notation in public language policy with intended values of mutual intelligibility and empathy, are needed..

국내 유용 해외 목재 수종의 연소특성 평가

서현정 ( Hyun Jeong Seo ),강미란 ( Mee Ran Kang ),박정은 ( Jung Eun Park ),손동원 ( Dong Won Son ) 한국목재공학회 2016 목재공학 Vol.44 No.1

본 연구는 국내에서 주로 사용되는 수입 목재 수종의 화재 안전성 평가에 대한 기초 자료를 구축하기 위하여 연소 및 열적 특성을 분석하였다. 연소 특성은 KS F ISO 5660-1 규정에 의거한 콘 칼로리미터 시험 방법으로 열방출률, 총방출열량, 연소 가스 발생, 그리고 중량 감소를 분석하였다. 열적 안정성은 열중량 분석(Thermogravimetric analysis)을 통해 시료의 열분해 온도 및 시점을 확인하였다. 분석된 수종은 국내 유용 수입 수종으로 멀바우(Merbau), 멤페닝(Mempening), 가로가로(Garo Garo), 말라스(Malas), 그리고 딜레니아(Dillenia)로 총 5수종을 선정하여 실험을 실시하였다. 열방출률 값은 말라스 > 멤페닝 > 가로가로 > 멀바우 > 딜레니아 순으로 확인되었다. 총 방출열량을 분석한 결과, 멤페닝 > 말라스 > 가로가로 > 멀바우 > 딜레니아 순으로 측정되었다. 가스분석 결과에서는 딜레니아가 CO/CO2비율이 최대치로 0.034로 확인되었고, 멤페닝과 말라스가 0.020으로 최소치를 나타내었다. 중량감소율의 최솟값은 딜레니아가 74.79%로 나타났으며, 말라스가 83.52%로 CO와 CO2의 발생과 목재 연소의 거동과의 상관관계를 나타내었다. 수종별 열분해 온도는 멀바우 348.07℃, 멤페닝 367.57℃, 가로가로 350.59℃, 말라스 352.41℃, 딜레니아 364.33℃로 확인되었다. The purpose of this study is to analyze the combustion and thermal properties in order to establish baseline data for the fire safety evaluation of imported wood. The combustion properties such as heat release rate, total heat release, gas yield, and mass loss were analyzed by the method of cone calorimeter test according to KS F ISO 5660-1 and thermogravimetric analysis (TGA). Analyzed species are five kinds of species as Merbau, Mempening, Garo Garo, Malas, and Dillenia. The heat released rate values showed the highest value of Malas as 375.52 kW/m2, and Dillenia showed the lowest value as 133.30 kW/m2. The data values were confirmed in the following order: Malas > Mempening > Garo Garo > Merbau > Dillenia. In case of the total heat release, it was measured in the following order: Mempening > Malas > Garo Garo > Merbau > Dillenia. The gas analysis results were that Dillenia showed the highest value of 0.034. Also, Mempening and Malas showed the lowest at 0.020 in the CO/CO2. Min of mass reduction was shown as 74.79% Sargent cherry, on the other hand, Malas had a 83.52%. It showed a correlation between and of the CO and CO2 generation and combustion characteristics of wood. The thermal decomposition temperature of the wood in the TGA were as follow that Merbau 348.07℃, Mempening 367.57℃, Garo Garo 350.59℃, Malas 352.41℃, Dillenia 364.33℃. The aim of this study is to determine the combustion properties of imported wood according to ISO 5660-1. And, based on the results of this study, we would proceed with further research for improving the fire safety of wood for construction.

주요 실내 사용 목재의 연소 특성

서현정(Seo, Hyun-Jeong),손동원(Son, Dong-Won) 대한건축학회 2015 대한건축학회 학술발표대회 논문집 Vol.35 No.1

지속가능발전지향 유아 창의인성 교육 프로그램 개발

서현정 ( Seo Hyunjung ),조부경 ( Cho Bookyung ),김경철 ( Kim Kyungchul ),최현주 ( Choi Hyunju ),최연철 ( Choi Younchul ) 한국유아교육학회 2018 유아교육연구 Vol.38 No.2

본 연구는 지속가능발전지향 유아 창의인성교육 프로그램을 개발을 목적으로 관련 문헌 고찰을 통해 지속가능발전지향과 창의인성에 대한 요소를 추출하여 프로그램의 이론적 준거를 마련하였다. 구성된 이론적 준거를 토대로 전문가협의회를 통해 실제적 준거를 세워 프로그램 기본 방향을 설정하고 프로그램 1차 시안을 구성하였다. 구성된 프로그램 시안은 전문가의 검토를 거쳐 수정한 후 충북 소재 4개 공립 유치원, 만 5세 8개 학급 189명의 유아를 대상으로 현장 적용을 실시하였다. 현장 적용 모니터링 결과와 현장 적용에 참여한 8명의 교사들의 의견을 반영하여 프로그램 1차 시안을 수정하여 2차 시안을 구성하였으며, 구성된 2차 시안은 유아교육전문가와 현장전문가의 2차 검증 과정을 거쳐 전문가들의 의견을 반영하여 수정한 후 지속가능발전지향 유아 창의인성교육 프로그램 최종안을 구성하였다. 프로그램 최종안은 ‘소중해요, 함께해요, 나누어요’ 라는 3가지 주제로 구성하였으며, 각 주제별로 3개의 소주제씩, 총 54개의 활동이 개발되었다. The purpose of this study is to develop a ‘sustainable development - oriented creativity character education program’ for 5-year-old children. First, theoretical criteria and frame of the program were established by drawing factors related to sustainable development, creativity and character from review of previous studies and related documents. Then direction and draft of the program were settled through professionals’ discussion based on established theoretical basis. The draft of the program was revised twice to reflect the opinions of teachers who participated in the field application conducted onto 189 children from 8 classes in 4 kindergartens in Chungbuk province and the result of program monitoring. Finally, a sustainable development-oriented creativity education program for 5-year-old children has been developed after another round of professionals’ and teachers’ review and validation. The program is composed of 3 main categories, where each main category has 3 sub-categories and 54 activities.

지속가능발전교육 수업에 참여한 유치원 교사 인식의 변화과정 탐색

서현정(Seo, Hyunjung) 한국교원대학교 유아교육연구소 2021 한국유아교육연구 Vol.23 No.1

본 연구의 목적은 지속가능발전교육 수업에 참여한 유치원 교사들의 지속가능발전교육에 대한 인식을탐색하는 것이다. 이러한 연구 목적을 달성하기 위해 H 교육대학원에 재학 중인 42명의 유치원 교사들이6주간 지속가능발전교육 수업에 참여하며 작성한 반성적 저널과 토론 및 면담 자료를 수집하여 분석하였다. 연구 결과, 유치원 교사들은 지속가능발전교육 수업 초기 유아기 지속가능발전교육에 대한 필요성을 인정하였으나 지속가능발전교육의 개념 이해에는 어려움을 나타냈다. 또한 유아기 지속가능발전교육을 실행하는데있어 교육적 가치와 유아 발달의 적합성 사이에서 갈등하였고, 특히 유아중심, 놀이중심을 강조하는 국가수준교육과정과의 연계를 어려운 과제로 인식하였다. 점차 수업에 참여하며 지식이나 체험 위주의 환경교육을뛰어 넘어 삶의 가치와 연결되는 지속가능발전교육이 필요함을 인식하게 되었고, 자신의 일상을 돌아보며실제 삶과 분리된 탈맥락적 교육 행위에 대해 갈등하게 되었다. 마지막으로 지속가능발전교육을 인간과세상에 대한 새로운 관점을 통해 미래를 살아갈 역량을 키워주는 교육, 삶을 위한 교육이라고 인식하게되었다. 이러한 결과를 토대로 지속가능발전교육에 대한 실천적 역량 배양이 가능한 교사양성교육이 필요함을 제언하였다. The purpose of this study is to explore changes in kindergarten teachers’ awareness of sustainable development education who were participated in a Education for Sustainable Development (ESD) course in a graduate program of H university in Korea. For this study, data from reflective journals, discussions, and interviews of 42 kindergarten teachers enrolled in the H Graduate School of Education were collected and analyzed. The findings of the study indicated that kindergarten teachers acknowledged a need for ESD in early childhood education, but displayed difficulties in understanding the concepts of ESD. They experienced some conflicts between educational values and young children’s developmental appropriateness in implementing ESD. In particular, they reported difficulties in linking ESD with the current national curriculum, which emphasizes a more child-focused and play-centered program. However, while teachers have been able to recognize and take in ESD, there is a notable conflict with decentralized educational behavior that is separate from real life which focuses on life values beyond knowledge and experience-oriented environmental education. Nonetheless, participants recognized ESD as education that fosters young children’s competency for thriving in the future. The results suggest that teacher training with ESD is necessary as to develop practical competencies as well as philosophical approaches in accordance with ESD.