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The combustion and thermal characteristics of fire retardant-treated pine (Pinus densiflora) were evaluated according to the KS F ISO 5660-1 (2003) standard, using a cone calorimeter. The specimens were treated with fire-retardant chemical compounds using pressure-impregnation equipment to reliably impregnate the compounds inside the wood. The heat release rate value of the fire retardant-treated wood specimens showed that the heat release time was delayed. A reduction of the total heat release value can indicate that fire was prevented from igniting in the materials during combustion. The microstructures of natural specimen and treated fire-retardant chemical compounds specimen were determined by scanning electron microscopy. It also confirmed that the pressureimpregnation processing method was effective in comparison to the other treatment methods.

Background: Education plays the most important role in establishing a disaster management system by creating a safety culture in the community and by engaging its members. This study explored the trends in research on disaster safety education based on the community from the perspective of lifelong education. Methods: We undertook a systematic literature review and keyword network analysis. The main search keywords were “community”, “disaster”, “safety”, and “education”. The subjects of education were adults, including disaster-vulnerable people, such as elderly and disabled people. A total of 185 articles and papers were identified and then narrowed down to 56. Results: Research related to disaster safety education has developed in a direction that reflects the characteristics of disasters that occur in the region. Currently, disaster safety education is being studied in various fields, including the humanities, social sciences, and engineering, focusing on disaster prevention. The main research methods in the reviewed literature were qualitative, especially case studies that applied narrative, storytelling, and risk scenario construction. Conclusion: The study provides a framework for the in-depth analysis of disaster risk management and risk level of communities, and lays the academic foundation for it.

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Toxic gases from five types of interior building materials were investigated according to Naval Engineering Standard (NES) 713. The materials were plywood, indoor wall coverings (wood wall plate members and pine wood), reinforced Styrofoam insulation, laminate flooring, and PVC. Specimens were measured using an NES 713 toxicity test apparatus to analyze the hazardous substances in combustion gas from the materials. We used the US Department of Defense standard (MIL-DTL, Military Standard) to calculate the toxicity index of the combustion gas. Emissions of CO 2 from all specimens did not exceed the NES 713 limit of 100,000 ppm. The amount of CO gas emissions from reinforced Styrofoam insulation was 6,098 ppm. 25 ppm and 49 ppm of formaldehyde were released from the reinforced Styrofoam insulation and PVC flooring, respectively. These values were less than the limit of 400 ppm. The highest emissions were from NO X emitted by plywood and were above the limit of 250 ppm. The toxicity index of the specimens were calculated as 5.19 for plywood, 4.13 for PVC flooring, 2.35 for reinforced Styrofoam insulation, 2.34 for laminate flooring, and 1.22 for indoor wall coverings (pine wood). Our research helps us to understand the properties of these five interior materials by analyzing the combustion gas and explaining the toxicity of constituents and the toxicity index. Also, it would be useful for giving fundamentals to guide the safe use of interior materials for applications.