• International Journal of Internet, Broadcasting and Communication
• /
• v.16 no.2
• /
• pp.237-246
• /
• 2024

In recent years, the frequent occurrence of fire accidents in university libraries has posed significant threats to the safety of students' lives and property, alongside negative social impacts. Accurately analyzing the factors affecting evacuation during library fires and proposing optimized measures for safe evacuation is thus crucial. This paper utilizes a specific university library as a case study, simulating fire evacuation scenarios using the Pathfinder software, to assess and validate evacuation strategies and propose relevant optimizations. Pathfinder, developed by Thunderhead Engineering in the United States, is an intuitive and straightforward personnel emergency evacuation assessment system, offering advanced visualization interfaces and 3D animation effects. This study aims to construct evacuation models and perform simulation analysis for the selected university library using Pathfinder. The library's structural layout, people flow characteristics, and the nature of fire and smoke spread are considered in the analysis. Additionally, evacuation scenarios involving different fire outbreak locations and the status of emergency exits are examined. The findings underscore the importance of effective evacuation in fire situations, highlighting how environmental conditions, individual characteristics, and behavioral patterns significantly influence evacuation efficiency. Through these investigations, the study enhances understanding and optimization of evacuation strategies in fire scenarios, thereby improving safety and efficiency. The research not only provides concrete and practical guidelines for building design, management, and emergency response planning in libraries but also offers valuable insights for the design and management of effective evacuation systems in buildings, crucial for ensuring occupant safety and minimizing loss of life in potential hazard situations

• International journal of advanced smart convergence
• /
• v.8 no.3
• /
• pp.69-77
• /
• 2019

Today, most of elevators have an emergency call facility for emergency situations. However, if the network installed in the elevator is also out of power, it cannot be used for the elevator remote monitoring and management. So, we develop an integrated and unified emergency call system, which can transmit not only telephone call but also data signals using PSTN(Public Switched Telephone Network) in order to remote monitoring and management of elevators, even though a power outage occurs. The proposed integrated emergency call system to process multiple data such as voice and operational information is a multi-channel board system which is composed of an emergency phone signal processing module and an operational information processing module in the control box of elevator. In addition, the RMS(remote management server) systems based on the Web consist of a dial-up server and a remote monitoring server where manages the elevator's operating information, status records, and operational faults received via the proposed integrated and unified emergency call system in real time. So even if there's a catastrophic emergency, the proposed RMS systems shall ensure and maintain the safety of passengers inside the elevator. Also, remote control of the elevator by this system should be more efficient and secure. In near future, all elevator emergency call system need to support multifunctional capabilities to transmit operational data as well as phone calls for the safety of passengers. In addition, for safer elevators, it is necessary to improve them more efficiently by combining them with high-tech technologies such as the Internet of Things and artificial intelligence.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.38C no.7
• /
• pp.605-611
• /
• 2013

If an accident vehicle propagates emergency messages to other vehicles close to it, the other drivers may realize and avoid the accident spot. In this letter, we propose a broadcast scheme to propagate emergency messages fast in urban VANETs (Vehicular Ad-Hoc Networks) with the help of GPS (Global Position System). In our scheme, a transmitting vehicle chooses the farthest node as the next relay vehicle to propagate emergency messages. And, we suggest an algorithm for intersection recognition and SCF (Store-Carry-Forward) task by taking advantage of periodic hello packets to reduce the propagation time and enhance the delivery ratio.

• Journal of Broadcast Engineering
• /
• v.12 no.3
• /
• pp.230-241
• /
• 2007

This paper presents the requirements analysis for the Terrestrial DMB Automatic Emergency Alert Service (AEAS) Standard. First, the basic concepts in disaster management and the AEAS system structure are presented as a background. Next, other emergency alert systems and the related standards are analyzed. We propose taxonomy to categorize the emergency alert systems and analyze the characteristics of each system. Next, we analyze advantages of T-DMB for the delivery medium of emergency alert message and problems to resolve for the enhanced performance. Finally, we propose service requirements which will achieve general/special-purpose, non-interrupting, location-adaptive, automatic, message delivery service. The paper will contribute as a guideline to the development for emergency alert service standards for other broadcasting media.

• Proceedings of the Korean Society of Broadcast Engineers Conference
• /
• 2014.06a
• /
• pp.240-242
• /
• 2014

최근 게릴라성 폭우등 지구 환경의 변화로 인하여 국지적 재난이 빈번히 발생하고 있는 상황이다. 국지적 재난 상황을 일반 국민에게 신속히 전파하는 방법으로 방송매체를 많이 이용하고 있으며 특히 디지털 방송과 같은 매체는 이동중이나 정전 그리고 데이터망이 유실된 상태에서도, 방송망을 활용한 재난방송 시스템이 필요한 상태이다. 이러한 점을 고려하여 DMB가 재난 방송에 적합한 매체로 인식이 되고 있다. 그러나 현재 DMB재난방송시스템은 광역 단위의 재난 상황시에만 DMB를 이용하여 상황전파가 이루어 지고 있으므로 국지적 재난상황과 같이 지역 맞춤형 재난방송을 통하여 재난방송의 신뢰성을 높이고 광범위한 정보가 아니라 지역단위의 필요한 정보를 제공하여 국민의 재산과 생명을 보호하는데 국지적 DMB 방송망이 적극 활용 되도록 재난경보방송시스템을 연구하였다.

• Proceedings of the Korean Society of Broadcast Engineers Conference
• /
• 2015.07a
• /
• pp.116-117
• /
• 2015

최근 국내외에서 자연재난 뿐 아니라 사회재난으로 인한 피해가 크게 증가하고 있다. 이를 극복하기 위해서는 기존보다 더욱 진보된 재난방송 시스템이 필요하다. 하지만 현재 일본의 One-Seg 기반 재난방송 기술은 자동인지 기법이 포함되어 있지만 국내의 T-DMB(Terrestrial-Digital Broadcasting) 기반 재난방송 기술은 자동인지 기법이 포함되어 있지 않다. 이에 본 논문은 One-Seg 기반의 자동인지 기법뿐만 아니라 국내에서 연구되고 있는 T-DMB 기반의 자동인지 기법을 소개 하며 이에 대한 성과를 기술한다.

• Journal of information and communication convergence engineering
• /
• v.12 no.1
• /
• pp.26-32
• /
• 2014

Vehicular-to-anything (V2X) technology is attractive for wireless vehicular ad-hoc networks (VANETs) because it allows for opportunistic choice of a vehicular protocol between vehicular-to-vehicular (V2V) and vehicular-to-infrastructure (V2I) communications. In particular, achieving seamless connectivity in a VANET with nearby network infrastructure is challenging. In this paper, we propose a density-based opportunistic broadcasting (DOB) protocol, in which opportunistic connectivity is carried out by using the nearby infrastructure and opposite vehicles for solving the problems of disconnection and long end-to-end delay times. The performance evaluation results indicate that the proposed DOB protocol outperforms the considered comparative conventional schemes, i.e., the shortest path protocol and standard mobile WiMAX, in terms of the average end-to-end delay, packet delivery ratio, handover latency, and number of lost packets.

• The Journal of the Institute of Internet, Broadcasting and Communication
• /
• v.9 no.3
• /
• pp.225-232
• /
• 2009

Increasing the number of the solitude old person maintain a healthy lifestyle, the research for the emergency detection and life monitoring is required. In this paper, the wireless sensor network technology is utilized to design a silver-care service model in the area of emergency silver generation activities. The service model proposed in this paper acquired by using mobile devices to access silver-care service with the network information obtained through video monitoring and sensing. Also, Proposed model, based on wide-area network connected with the best wireless network of the PDA and mobile phones for the solitude old person.

• International Journal of Internet, Broadcasting and Communication
• /
• v.13 no.1
• /
• pp.116-122
• /
• 2021

This study evaluated the effect of simulation training on cardiac arrest in hospitals for inactive nurses with 360 VR content, and attempted to prepare basic data for simulation training for inactiv nurses in the future. The design of this study is an experiment study before and after a single group. The study period was from October 13, 2020 to December 17, 2020. The subjects of the study were a total of 21 nurses who participated in the education program for inactive nurses. For simulation training for inactive nurses, Microsoft Powerpoint, hybrid simulation, high-fidelity simulation, and 360 VR content were applied for theories education and practical education. As a result of the study, the satisfaction level of the curriculum for the cardiac arrest situation in the hospital for inactive nurses was 4.78±0.36 points out of 5 points. Understanding of education was 4.71±0.46 points out of 5 points. Usefulness of education was 4.80±0.40 points out of 5 points. Confidence in airway maintenance before and after training, BLS review, manual defibrillator, emergency medication administration, airway maintenance, emergency situation simulation, and debriefing were all significant. According to the results of this study, simulation training of the situation of cardiac arrest in the hospitals for inactive nurses was effective. In future studies, it will be necessary to develope and verify specific teaching and learning methods by applying various cases of cardiac arrest situations in consideration of the type of hospitals.

• Journal of the Korea Convergence Society
• /
• v.11 no.8
• /
• pp.47-53
• /
• 2020

In the case of a failure due to equipment deterioration in the public address system or a worker's mistake during construction, broadcasting becomes impossible. In this situation, we have designed a more advanced management broadcast system that can broadcast. The broadcasting service is operated using main broadcasting device, and local broadcasting device operates separately only in the local area. If the main broadcasting device becomes inoperable, the procedure for transferring the control activates the device with the local broadcasting devices based on data backed up by the main controller. This paper proposes an improved method of the conventional emergency broadcasting device duplication method. The existing method could not use the standby equipment in the normal state, but in the proposed method, the standby equipment can be used as local broadcasting equipment in usually. This method enables stable system operation while minimizing resource waste due to redundant configuration of expensive devices.