• 한국수학교육학회지시리즈D:수학교육연구
• /
• 제24권3호
• /
• pp.229-254
• /
• 2021

Students' participation in epistemic practices, which are related to knowledge construction on the part of students, is becoming a crucial part of learning (Goizueta, 2019). Research on epistemic practices in science education draws attention to teachers' support of students to engage in epistemic practices in mathematics instruction. The research highlights a need for incorporating epistemic goals, along with conceptual and social goals, into instruction to promote students' epistemic practices. In this paper, I investigate how teachers interact with students to integrate epistemic goals. I examined 24 interaction excerpts that I identified from six interview transcripts of two beginning teachers' mathematics instruction. Each excerpt was related to the teachers' talk about their specific interaction(s) in a small group. I explored how each teacher's discursive moves and goals were conceptual, social, and epistemic-related as they intervened in small groups. I found that both teachers used conceptual, social, and epistemic discursive move but their discursive moves were related only to social and social goals. This paper suggests supporting teachers to develop epistemic goals in mathematics instruction, particularly in relation to small groups.

• 한국건설관리학회:학술대회논문집
• /
• 한국건설관리학회 2008년도 정기학술발표대회 논문집
• /
• pp.712-715
• /
• 2008

도심의 노후화 등으로 재건축 및 재개발의 활성화, 대규모 택지개발에 의한 신도시 개발, 사회기반시설 확충 등의 증가로 건설폐기물의 발생이 매년 급증하고 있다. 이를 재활용하기 위한 방안중의 하나로써 건설폐기물을 직접 재활용하는 방법이 있다. 현장에서 직접 건설폐기물을 재활용하는 경우, 재활용 자재의 대부분을 차지하는 순환골재의 사용처를 안정적으로 확보할 수 있으며, 건설용 자재의 현장 반출입량이 감소됨에 따라서 운송비용, 이산화탄소 발생량, 교통량 등을 감소할 수 있어 경제적, 사회적, 환경적으로 많은 효과를 기대할 수 있을 것이다. 따라서 본 연구에서는 건설폐기물의 "현장재활용" 활성화를 위하여 건설폐기물의 발생에서부터 "현장재활용" 적용까지 일괄적으로 처리할 수 있는 "현장재활용 시뮬레이션 프로그램"의 알고리즘을 개발하고자 한다.

• 국제학술발표논문집
• /
• The 9th International Conference on Construction Engineering and Project Management
• /
• pp.269-276
• /
• 2022

The robustness of a supply chain (i.e., the ability to cope with external and internal disruptions and disturbances) becomes more critical in ensuring the success of a construction project because the supply chain of today's construction project includes more and diverse suppliers. Previous studies indicate that topological features of the supply chain critically affect its robustness, but there is still a great challenge in characterizing and quantifying the impact of network topological features on its robustness. In this context, this study aims to identify network measures that characterize topological features of the supply chain and evaluate their impact on the robustness of the supply chain. Network centrality measures that are commonly used in assessing topological features in social network analysis are identified. Their validity in capturing the impact on the robustness of the supply chain was evaluated through an experiment using randomly generated networks and their simulations. Among those network centrality measures, the PageRank centrality and its standard deviation are found to have the strongest association with the robustness of the network, with a positive correlation coefficient of 0.6 at the node level and 0.74 at the network level. The findings in this study allows for the evaluation of the supply chain network's robustness based only on its topological design, thereby enabling practitioners to better design a robust supply chain and easily identify vulnerable links in their supply chains.

• 한국건축시공학회지
• /
• 제22권1호
• /
• pp.91-102
• /
• 2022

최근 전 세계적으로 유행하고 있는 호흡기 감염질환인 코로나19로 인해 많은 산업이 큰 피해를 받고 있다. 특히 건설 산업의 경우 재택근무를 할 수가 없고, 확진자가 나오면 큰 피해로 이어질 수 있어 코로나19 예방 및 확산 방지에 대한 중요성이 대두되었다. 이에 정부는 「코로나19 예방 및 확산방지를 위한 건설현장 대응 가이드라인」 등을 입안하였다. 또한, 건설현장 코로나 분야의 국내·외의 연구가 활발히 진행되고 있다. 하지만, 국내의 경우 실제 건설현장에서 운영하는 대응책의 효율성을 분석하거나 건설 근로자를 주체로 진행된 연구가 부족한 실정이다. 이에 본 연구는 건설 현장 근로자를 대상으로 코로나19 방역관리체계 구축 및 대응계획을 현장 관리 부분과 사회적 관리 부분으로 나누어 각각에 대한 설문조사를 실시한 후, AHP·IPA 분석을 실시하였다. 분석 결과, 사회적 관리 중 '감염증 관리체계 및 유관기관 협조체계 구성', '근로시간 단축'이 중요도는 높지만 만족도가 낮은 영역에 속하였으며, 이에 대한 우선 시정노력이 필요하다고 판단하여 두 항목을 분석하고 관련 대책을 제시하였다. 본 연구의 결과는 건설현장의 방역관리체계 및 대응계획 내실화 및 코로나19 감염 관련 건설 산업 피해를 최소화하는 데 기여할 수 있을 것이다.

• 한국건설관리학회논문집
• /
• 제14권3호
• /
• pp.97-106
• /
• 2013

최근 건설산업은 녹색건설(Green Construction)이라는 새로운 도전에 직면하고 있다. 본 연구에서는 "건설기업으로 하여금 녹색건설을 추진하게 하는 동인(動因)은 무엇인가?"라는 연구 질문(Research Question)을 설정하여 녹색건설을 추진하게 하는 동기유발요인을 도출하고 주요 특징과 시사점을 분석하였다. 연구 범위는 대형 종합건설사로 설정하였으며 정치경제 접근법을 연구방법론으로 채택하였다. 대형 종합건설사는 미래시장인 녹색건설에 대해 높은 관심을 보이고 있는 것으로 나타났으며, 녹색건설시장의 시대적 사회적 흐름에 주목하며 경제적 요인들을 중요시하고 있었다. 특히 동기유발요인 중 내부 경제적 요인이 중요하게 작용하며 최고경영진의 의지가 이를 유발시키는 중요한 동력으로 나타났다.

• 한국안전학회지
• /
• 제20권4호
• /
• pp.97-105
• /
• 2005

As construction project is becoming larger, construction progress and works are more various and complex according to recent Korean construction tendency. The growth of construction induces much pollution on the progress of construction and the problems due to the construction pollution are raised into social problem strongly, because it is increasing the need on the quality of lift and the desire of clean environment. This study aimed to seek far the effective solving plan of the construction popular complaints by surveying the real condition of construction popular complaints and analyzing the cause and tansaction period of popular complaints. For this study, the laws related and popular complaints were analysed focusing on the documents in low district offices of Gwangju from 2000 to 2004. As a result, the types of construction popular complaints were divided into 17 and the causes were as follows in order: crack and subsidence of ground(14.90%), infringement of private life(11.55%), noise(10.80%), infringement of a right to sunshine(10.07%) and breakdown(6.7%). Consequently, it is considered that these complaints are occurred by physical and environmental causes.

• 대한안전경영과학회지
• /
• 제25권2호
• /
• pp.113-120
• /
• 2023

Occupational safety and health management expenses in the construction industry are statutory and separately included in the cost statement to prevent occupational accidents and health problems. The expenses are determined by multiplying the standard amount by the rate decided according to construction types and scales. However, the current expense appropriation method does not properly reflect the recent changes in the construction industry such as industry size, industry diversification, and social atmosphere about safety reinforcement. This study surveyed 1579 questionnaires in total and analyzed expense execution rate and proportion of each expense category. The expense execution rate was relative higher in complex construction (e.g., heavy construction = 126%, civil engineering = 125%) and long-period project (equal to or over 48 months construction = 133%) compared to general construction (98~116%) and short-period project (less than 48 months construction = 115%). The proportion of spending expenses was higher in the category of safety manager labor costs (25~52%), safety facility costs (22~40%), and personal protective equipment costs (10~25%). The analysis results of the study can be utilized in revising the standard expense appropriation method by reflecting the current usages of the occupational safety and health management expenses in the construction industry.

• 한국초등과학교육학회지:초등과학교육
• /
• 제37권4호
• /
• pp.416-429
• /
• 2018

In social constructivist teaching, knowledge construction is achieved through learners' collective social interaction. Vygotsky argued that this process is mediated with language use, and the development of higher order thinking is realized through the transition from inter-personal psychological functions to intra-personal psychological functions. In so doing scientific concepts are internalized to learners. This study examined the third grade elementary students' inter/intra-personal psychological functions and their internalization processes during social constructivist teaching plan about strata and fossils. The lessons were designed along with Wells' dialogic inquiry and Leach and Scott's social constructivist teaching-learning sequences. Results showed that a teacher's utterances of talking with questioning to switch attention, creating cognitive disequilibrium, and expanding the width of students' opinions could make effective inter-personal psychological function. In addition, a learner's inner speech expressed into social discourse through talking about personal experiences, comparing epistemic idea with visual representation, or applying to different situation showed his/her intra-personal psychological function. Some cases of learners' internalization through language use could be at the stage of knowledge building and understanding of the spiral of knowing, but not all. Thus it is argued that a teacher's deeper insight into Vygotskian social constructivist teaching can make elementary science classroom teaching more effective in their inter/intra-psychological functions.

• Journal of Construction Engineering and Project Management
• /
• 제2권3호
• /
• pp.17-29
• /
• 2012

Delays are one of the biggest problems facing by the construction industry and they have significant financial and social impact in construction projects. The paper presents a framework of Delay Analysis System (DAS) with the aim of analysing the impact of delay factors in Libyan construction projects. The system has designed by integrating the possible delay factors, critical activities of a project using@risk simulator. A case study of building project was demonstrated to identify the impact of delays and the sensitivity of delay factor. The case study result showed that the project might be delayed by 97 to 103 days in comparison to the planned duration. The developed DAS is a tool for analysing and identify the impacts of delay factors and assist to construction manager to take necessary measure in reducing the delay impact. The paper provides a methodology for analysing the possible delay impact in a construction project and informing to construction manager in advance of the possible delay factors.

• 한국건축시공학회:학술대회논문집
• /
• 한국건축시공학회 2023년도 봄 학술논문 발표대회
• /
• pp.389-390
• /
• 2023

To improve the cost performance of construction sites, various systems and standards are constantly being developed and implemented. Although legal requirements for these system and standard improvements have been increasing, the cost efficiency performance of construction sites remains stagnant. We have digitized documents generated through construction supervision work at 39 building construction sites and proposed a model that can support decision-making in cost efficiency evaluation. This model selects key keywords that are considered to be highly related to cost efficiency by identifying the patterns and relationships of keywords through associated rule analysis and social network analysis using keywords derived from documents. In addition, it is expected to be used as a decision-making aid to determine the cost efficiency of a specific building construction site by establishing a logistic regression model using core keywords. As a systematic database of construction supervision documents and an integrated system of massive data generated by digital technology are established in the future, the accuracy and reliability of the cost efficiency evaluation model are expected to be reinforced.