• Journal of the Korea Safety Management & Science
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• v.5 no.3
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• pp.57-67
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• 2003

The trends in building construction these days are moving towards having better work space and greater suitability for the use of information technology, Therefore people can work in a more relaxed, delightful and pleasant environment. So accidents like fire could cause the mass destruction of human beings. In this paper, we estimated the escape time from a building and simulated the study results on computer to see how safe it would be in a real situation.

• Journal of Ecology and Environment
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• v.47 no.4
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• pp.272-281
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• 2023

Ecosystem observatories are burgeoning globally in an endeavour to detect national and global scale trends in the state of biodiversity and ecosystems in an era of rapid environmental change. In this paper we highlight the additional importance of regional scale outcomes of such infrastructure, through an introduction to the Great Western Woodlands TERN (Terrestrial Ecosystem Research Network) SuperSite, and key findings from three gradient plot networks that are part of this infrastructure. The SuperSite was established in 2012 in the 160,000 km² Great Western Woodlands region, in a collaboration involving 12 organisations. This region is globally significant for its largely intact, diverse landscapes, including the world's largest Mediterranean-climate woodlands and highly diverse sandplain shrublands. The dominant woodland eucalypts are fire-sensitive, requiring hundreds of years to regrow after fire. Old-growth woodlands are highly valued by Indigenous and non-Indigenous communities, and managing impacts of climate change and the increasing extent of intense fires are key regional management challenges. Like other TERN SuperSites, the Great Western Woodlands TERN SuperSite includes a core eddy-covariance flux tower measuring exchanges of carbon, water and energy between the vegetation and atmosphere, along with additional environmental and biodiversity monitoring around the tower. The broader SuperSite incorporates three gradient plot networks. Two of these represent aridity gradients, in sandplains and woodlands, informing regional climate adaptation and biodiversity management by characterising biodiversity turnover along spatial climate gradients and acting as sentinels for ecosystem change over time. For example, the sandplains transect has demonstrated extremely high spatial turnover rates in plant species, that challenge traditional approaches to biodiversity conservation. The third gradient plot network represents a 400-year fire-age gradient in Eucalyptus salubris woodlands. It has enabled characterisation of post-fire recovery of vegetation, birds and invertebrates over multi-century timeframes, and provided tools that are directly informing management to reduce stand-replacing fires in eucalypt woodlands. By building regional partnerships and applying globally or nationally consistent methodologies to regional scale questions, ecological observatories have the power not only to detect national and global scale trends in biodiversity and ecosystems, but to directly inform environmental decisions that are critical at regional scales.

• Proceedings of the Korea Concrete Institute Conference
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• 2008.11a
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• pp.935-940
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• 2008

When reinforced concrete is subjected to high temperature as in fire, there is deterioration in its properties of particular importance are loss in compressive strength, cracking and spalling of concrete, destruction of the bond between the cement paste and the aggregates and the gradual deterioration of the hardend cement paste. Assessment of fire-damaged concrete usually starts with visual observation of color change, cracking and spalling of the surface. In this paper, it was reported the trends of research and practical use on the Explosive Spalling Properties and Performance Based of Structural Design of the High-Strength Concrete.

• Journal of IKEEE
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• v.25 no.3
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• pp.556-564
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• 2021

This paper presents trends of safety improvement technologies for an electric propulsion system of eco-friendly ships. As an effort to reduce a green house effect, demands for eco-friendly ships have been increased. An energy storage system (ESS) is one of key systems in an eco-friendly ship and a lithium-ion battery generally used in an ESS system due to its high power density and efficiency. However, a lithium-ion battery is considered as one of reasons for ESS fire hazard. Since a fire extinguishing facility is especially limited in the ocean, safety issue in an eco-friendly ship is important. In this paper, recent safety improvement technologies for traction motors, ESS batteries and structures for eco-friendly ships are presented.

• Journal of the Korean Recycled Construction Resources Institute
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• v.12 no.2
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• pp.178-187
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• 2024

In this study, it was determined that it was necessary to consider the replacement rate when applying recycled coarse aggregate to concrete, so data on existing research trends and results were collected and the mechanical properties of concrete according to the replacement rate of recycled coarse aggregate were analyzed. In collecting data on recycled coarse aggregate, data without processes such as compressive strength and removal of residual mortar attached to recycled coarse aggregate were collected among the concrete measurement items. In the case of concrete with 50 % and 100 % replacement of recycled coarse aggregate, it was confirmed that the mechanical properties were lower or higher than ordinary concrete by -36.0 ~ 9.9 % and -40.0 ~ 10.4 %, respectively, on average. Accordingly, it is judged that additional water should be mixed in consideration of the absorption rate when mixing, and the replacement rate of recycled coarse aggregate, which has mechanical properties of 80 % or more compared to ordinary concrete, should be less than 50 %.

• Transactions of the Korean Society for Noise and Vibration Engineering
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• v.21 no.5
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• pp.408-415
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• 2011

Advanced tanks in the future combat system are expected to have the trends of large caliber, high explosive shell and light weight for destructive power and improvement in mobility. Their guns are required to have longer barrels to meet increased muzzle exit velocities. However, as the length of the barrel is extended, the vibrations induced by the breech forces in fire and the terrain lead to increased muzzle pointing errors. Therefore, the fire-induced and terrain-induced vibrations must be attenuated. A method to reduce these vibrations without the significant increase of the gun mass is to use the forward thermal shroud as part of a tuned mass damper. In this study, the dynamically-tuned-shroud using this shroud and leaf springs is introduced and its effectiveness on the vibration attenuations of the barrel are verified. The parametric studies on the stiffness of these leaf springs are performed and the analytical results are verified using the experimental model of the dynamically-tuned-shroud.

• The Korean Journal of Emergency Medical Services
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• v.28 no.1
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• pp.63-76
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• 2024

Purpose: To analyze trends related to demography and EMS and to provide supporting data for the appropriate deployment of EMS providers. Methods: In this cross-sectional study, data on patients transported by 119 EMS, demographics, and EMS factors were collected using the Korean Statistical Information Service (KOSIS) and the National Fire Agency annual report from 2017 to 2021. Results: During the study period, the total number of patients and those with severe disorders transported via 119 EMS showed an increasing trend. The total fertility rate and population during the same period tended to decrease, and the population density and number of households increased; however, there was a disparity between regions. The main demographic factors affecting the number of patients transported were population density and total fertility rate, while the main EMS factors were the number of ambulances and provision of emergency medical information services(hospital guidance, pharmacy information, and first aid guidance). Conclusion: From the perspective of EMS providers' force deployment, it is necessary to consider population density, population, number of households, total fertility rate, and number of emergency medical institutions and to strengthen the role of diverting the use of 119 EMS by minor patients by providing emergency medical information.

• Herbal Formula Science
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• v.20 no.1
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• pp.159-166
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• 2012

Objectives : This study was carried out to investigate trends of using Shihogayonggolmoryo-tang granule on neuropsychiatry fields. And suggest that using herbal extracts change non-prescription medicine to prescription medicine. Methods : I researched 86 outpatients who treated with Shihogayonggolmoryo-tang granule at oriental medicine hospital. And I analyzed their medical records of chart review study. Results : 1. Average medication time in this research was 14.9 days and the main usage was supplementary to herbal medicine, such cases amounted to 62%. 2. There are 52 patients out of 86 who are much better, such cases amounted to 55%. 3. The improved diagnosis is Syndrome of heart-fire flaring up, Syndrome of upper energizer dryness-heat, headache, and tinnitus. The improved symptom is anxiety, headache, dizziness, tic disorders, and chest discomfort. Conclusions : I expect to using herbal extracts change non-prescription medicine to prescription medicine based on this study.

• Electronics and Telecommunications Trends
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• v.38 no.3
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• pp.57-65
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• 2023

Emergency numbers, such as 112 and 119, are used in many countries to connect people in need with emergency services such as police, fire, and medical assistance. We describe development directions of intelligent response technology for emergency calls. The development of this technology refers to enhancing the efficiency and effectiveness of response systems by using advanced methods such as artificial intelligence, machine learning, and big data analytics. We focus on a system that assists the receptionist of an emergency call. In the future, the recognition rate and decision-making accuracy of intelligent response technologies should be improved considering characteristics of public safety and emergency domain data. Although the current technology remains at the level of assisting a receptionist, a fully autonomous response technology is expected to emerge in the future.

• The Korean Journal of Emergency Medical Services
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• v.8 no.1
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• pp.199-210
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• 2004

Since the 119 fire department was legally permitted to serve in Emergency Medical Service(EMS)Operation of emergency patients in 1983, 119 EMS operation in general has made a big progress in serving the needs for emergency patients. Currently EMS operation is carried out by 119 EMS unit, private ambulance Co.,etc. But due to the public recognition and volunteers, 119 EMS operation carries the major share of the service. This observation is not surprising in that such a trends occured in Japan 20 years ago. This paper compared the 119 EMS operation conducted by the fire department in Korea with that of Japan in order to draw some inferences from the comparison. The results of the study compared to Japan were as follows: 1. Japan was higher 1.5 times in the number of EMS units per population(100,000), 1.1 times in the number of patient transports per unit. 2. Japan was higher 4.54 times in the number of the 119 EMS personnel per population(100,000), 30.6 times in that per square killometers, 30.6 times per 119 EMS unit, in per ambulance 2.48times. 3. Japan was higher 1.83 times in the number of ambulance per population(100,000), 1.26 times in that per square killo meters. 4. Japan was higher 1.7 times in the number of transport patients per population (100,000), but Korea was higher 2.68 times in the transport patients per EMS personal. 5. Compared to Japan, there was no emergency care related to ALS, for example, such as administering dugs orally and intravenously, interpreting elctrocardiograms, performing endotracheal tube or LMA insertion, using monitors and other complex equipments in Korea.