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Hina Aman, Pourang Irani, & Hai-Ning Liang. (2012). A review of information communication technology applied on common tasks during times of emergency. In Z.Franco J. R. L. Rothkrantz (Ed.), ISCRAM 2012 Conference Proceedings – 9th International Conference on Information Systems for Crisis Response and Management. Vancouver, BC: Simon Fraser University.
Abstract: Research in emergency response systems has produced significant literature in a very short span of time. We review a corpus of published works on how Information Communication Technology (ICT) is being utilized and the type of tasks ICT attempts to support in the event of a crisis due to disasters, whether natural or man-made. In our research, we have been able to distinguish eight types of tasks supported by technology during a disaster. We list some of these technologies used by the public, practitioners and researchers to illustrate the current trends of technology usage. We also identify gaps and technology needs that require our attention. Given the increasing frequency and severity of disasters, this research is timely as it (1) contributes to our understanding of the trends of development and technology use during times of crises and (2) identifies potential areas for future work to improve ICT's role during times of emergency. © 2012 ISCRAM.
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Tung Bui, & Siva Sankaran. (2006). Foundations for designing global emergency response systems (ERS). In M. T. B. Van de Walle (Ed.), Proceedings of ISCRAM 2006 – 3rd International Conference on Information Systems for Crisis Response and Management (pp. 72–81). Newark, NJ: Royal Flemish Academy of Belgium.
Abstract: Works on Emergency Response Systems (ERS) tend to set aside-or discuss peripherally-the global nature of catastrophes and the unique conditions under which these systems have to operate. Major disasters either affect more than one country or require the help of more than one nation. Designing ERS to manage global crisis situations pose great challenges due to incompatible technologies, language and cultural differences, variations in knowledge-level and management styles of decision makers, and resource limitations in individual countries. In this paper, we outline theoretical foundations for designing global ERS. We develop a path model that identifies the elements and their interactions needed to ensure quality of outcomes and processes of emergency response. We also prescribe a Global Information Network (GIN) architecture to provide decision-makers with timely response to crises involving global intervention.
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Monika Büscher, Markus Bylund, Pedro Sanches, Leonardo Ramirez, & Lisa Wood. (2013). A new manhattan project? Interoperability and ethics in emergency response systems of systems. In J. Geldermann and T. Müller S. Fortier F. F. T. Comes (Ed.), ISCRAM 2013 Conference Proceedings – 10th International Conference on Information Systems for Crisis Response and Management (pp. 426–431). KIT; Baden-Baden: Karlsruher Institut fur Technologie.
Abstract: In this paper we discuss ethical challenges arising around IT supported interoperability in multi-agency emergency management and explore some methodological responses.
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Louise K. Comfort, Brian A. Chalfant, Jee Eun Song, Mengyao Chen, & Brian Colella. (2014). Managing information processes in disaster events: The impact of superstorm sandy on business organizations. In and P.C. Shih. L. Plotnick M. S. P. S.R. Hiltz (Ed.), ISCRAM 2014 Conference Proceedings – 11th International Conference on Information Systems for Crisis Response and Management (pp. 230–239). University Park, PA: The Pennsylvania State University.
Abstract: Building community resilience to natural disasters represents a major policy priority for the United States as hazards impact vulnerable urban regions with increasing frequency and severity. Applying network analysis techniques, we examine the dynamics of emergency response to Superstorm Sandy, which struck the United States east coast in late October 2012 and caused over $72 billion in damages. Drawing on a variety of data sources and analytical techniques, we document the storm's impact on a system of interacting private, public, and nonprofit organizations. We find that the storm's response network exhibited clear patterns of information gaps and flows among different types of organizations. Our findings suggest a general lack of communication between government agencies and businesses, an area of potential improvement in future regional-scale emergency response systems.
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Louise K. Comfort, Milos Hauskrecht, & Jeen-Shang Lin. (2008). Dynamic networks: Modeling change in environments exposed to risk. In B. V. de W. F. Fiedrich (Ed.), Proceedings of ISCRAM 2008 – 5th International Conference on Information Systems for Crisis Response and Management (pp. 576–585). Washington, DC: Information Systems for Crisis Response and Management, ISCRAM.
Abstract: Modeling the interaction between interdependent systems in dynamic environments represents a promising approach to enabling communities to assess and manage the recurring risk to which they are exposed. We frame the problem as a complex, adaptive system, examining the interaction between transportation and emergency response as a socio-technical system. Using methods of spatial and statistical analysis, we overlaid the engineered transportation system on the organizational emergency response system to identify the thresholds of fragility in each. We present a research design and preliminary results from a small-scale study conducted in the Pittsburgh Metropolitan Region that examined the interaction between the transportation and emergency response systems. These results informed the design of a Situational Assessment Module for emergency managers, currently under development at the University of Pittsburgh.
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Catherine Easton. (2014). The digital divide, inclusion and access for disabled people in IT supported emergency response systems: A UK and EU-based analysis. In and P.C. Shih. L. Plotnick M. S. P. S.R. Hiltz (Ed.), ISCRAM 2014 Conference Proceedings – 11th International Conference on Information Systems for Crisis Response and Management (pp. 275–278). University Park, PA: The Pennsylvania State University.
Abstract: This short insights paper examines IT Supported Emergency Response systems from the perspective of the digital divide and access for disabled people. It is argued that inclusive design is often overlooked in the development of emergency systems and this can lead to increased marginalisation of certain societal groups, such as disabled people and older people. Given the importance of equality of provision in relation to emergency responses there is a need to examine accessibility policy in this area to determine whether it enables the equal participation of all. This is important both in relation to the ability to access key information in an emergency situation and to participate in crowdsourced data generation to help in the targeting of resources, both at the time of an emergency and in subsequent planning. This insights paper takes both a practical and theoretical approach and focuses upon key policies emanating from the EU and UK.
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Jean-François Gagnon, François Couderc, Martin Rivest, Simon Banbury, & Sébastien Tremblay. (2013). Using SYnRGY to support design and validation studies of emergency management solutions. In J. Geldermann and T. Müller S. Fortier F. F. T. Comes (Ed.), ISCRAM 2013 Conference Proceedings – 10th International Conference on Information Systems for Crisis Response and Management (pp. 512–516). KIT; Baden-Baden: Karlsruher Institut fur Technologie.
Abstract: Emergency management situations are highly complex and require the collaboration of multiple parties for adequate responses to incidents. The design and validation of effective emergency response systems is critical in order to improve the overall effectiveness of teams tasked to manage emergency situations. We report ongoing work whose objective is to increase the efficiency of emergency response solutions through iterative cycles of human in-the-loop simulation, modeling, and adaptation. Ultimately, this cycle could either be achieved offline for complex adaptation (e.g., development of a novel interface), or online to provide timely and accurate decision support during an emergency management event. The method is made possible by achieving a high degree of realism and experimental control through the use of an innovative emergency management simulation platform called SYnRGY.,Emergency Management, Emergency Response Systems, Simulation, System Design, Validation.
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Noel Johnson, & Ann Fruhling. (2006). Development and assessment of the STATPack[TM] emergency response system. In M. T. B. Van de Walle (Ed.), Proceedings of ISCRAM 2006 – 3rd International Conference on Information Systems for Crisis Response and Management (pp. 197–201). Newark, NJ: Royal Flemish Academy of Belgium.
Abstract: The STATPack is a telemedicine consultation and emergency response system which was developed to increase statewide laboratory responsiveness to public health emergencies. Although several emergency response management information systems have been created for diagnostic laboratories at the national level, most states in the U.S. do not have the capability to share critical public health microbiology laboratory information at local levels, especially in rural communities. This paper offers a description and preliminary assessment of the STATPack as it is being deployed by the Nebraska Public Health Laboratory and should be recognized as research in-progress. Initial experiences with this emergency response system have been encouraging.
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Manuel Llavador, Patricio Letelier, Carmen Penadés, José H. Canós-Cerdá, Marcos R. S. Borges, & Carlos Solís. (2006). Precise yet flexible specification of emergency resolution procedures. In M. T. B. Van de Walle (Ed.), Proceedings of ISCRAM 2006 – 3rd International Conference on Information Systems for Crisis Response and Management (pp. 110–120). Newark, NJ: Royal Flemish Academy of Belgium.
Abstract: Emergency Managers face a number of critical problems related to the compilation, validation, and use of Emergency Procedures. Traditional approaches do not provide enough expressiveness to accurately specify emergency procedures covering each possible scenario. As a result of this situation, Emergency Procedures are not as useful as they should be, neither in prevention nor during resolution of an emergency. In this work, we present an approach that merges two techniques to provide the broad expressiveness required when specifying Emergency Procedures. To represent sequences on actions performed by different participants we use workflow techniques. On the other hand, we use rules to represent available or mandatory actions according to the state of the system during the emergency. These rules are expressed in dynamic logic as the underlying formalism. Our approach provides more expressiveness and precision for the specification of Emergency Procedures, offering better conditions for their verification and validation. As a case study we have used part of a city subway Emergency Procedure.
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Ma Ma, Shengcheng Yuan, H. Zhang, & Yi Liu. (2013). Framework design for operational scenario-based emergency response system. In J. Geldermann and T. Müller S. Fortier F. F. T. Comes (Ed.), ISCRAM 2013 Conference Proceedings – 10th International Conference on Information Systems for Crisis Response and Management (pp. 332–337). KIT; Baden-Baden: Karlsruher Institut fur Technologie.
Abstract: The present paper introduces a scenario-based framework design for connecting emergency response system with human behavior analysis and social information processing, which aims at improving its comprehensive capability in dealing with unexpected situations caused by physical, social and psychological factors during a crisis. The overall framework consists of four function modules: Scenario awareness, scenario analysis, scenario evolvement and scenario response. A detailed function design for each module is presented as well as the related methodologies used for integration of four modules. The contribution of this paper includes two aspects. One is realizing the integration of incident evolution, information-spreading and decision-making by taking account of physical, social and psychological effects during emergency. The other is improving the efficiency of decisionmaking through dynamic optimization process.
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Edward Mahinda, & Brian Whitworth. (2004). Evaluating flexibility and reliability in emergency response information systems. In B. C. B. Van de Walle (Ed.), Proceedings of ISCRAM 2004 – 1st International Workshop on Information Systems for Crisis Response and Management (pp. 93–98). Brussels: Royal Flemish Academy of Belgium.
Abstract: Flexibility, variously known as adaptability, tailorability, and customizability, has long been recognized as important in information system (IS) success. Reliability has known value in IS for the resulting predictability it bestows on a system. However increasing flexibility can increase possible paths for system breakdown, and so contribute to failure, i.e. increasing flexibility can reduce reliability. Reliability and flexibility seem in design “tension”, as one creates change and the other resists it. The combination of reliability and flexibility has been called “ robustness”, and it seems a desirable integration particularly for emergency response systems. However typically these two areas are studied separately. Our approach to evaluating the combination of reliability and flexibility is to define two distinct requirements that neither overlap nor contradict, and can be assessed by system users. A questionnaire instrument for users is proposed for measurement of the flexibility and reliability of a system. © Proceedings ISCRAM 2004.
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Alessio Malizia, Francisco Astorga-Paliza, Teresa Onorati, Paloma Díaz, & Ignacio Aedo. (2008). Emergency alerts for all: An ontology based approach to improve accessibility in emergency alerting systems. In B. V. de W. F. Fiedrich (Ed.), Proceedings of ISCRAM 2008 – 5th International Conference on Information Systems for Crisis Response and Management (pp. 197–207). Washington, DC: Information Systems for Crisis Response and Management, ISCRAM.
Abstract: When a disaster occurs it is critical that emergency response information systems share a common ontology to support their disaster management alerting functions and notifications. Notifications are critical when an emergency scenario is going to happen (e.g. a typhoon approaching) so it is crucial, for emergency systems, to be able to transmit them to all kinds of recipients. An ontology was developed by investigating different sources: accessibility guidelines, emergency response systems, communication devices and technologies, taking into account the different abilities of people to react to different alarms (e.g. mobile phone vibration as an alarm for deaf people). We think that the proposed ontology addresses the information needs for sharing and integrating emergency notification messages and contents over different emergency response information systems and to be accessible under different conditions and for different kind of users.
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Michael J. Marich, Thomas A. Horan, & Benjamin Schooley. (2008). Understanding IT governance within the San Mateo County Emergency Medical Service agency. In B. V. de W. F. Fiedrich (Ed.), Proceedings of ISCRAM 2008 – 5th International Conference on Information Systems for Crisis Response and Management (pp. 451–461). Washington, DC: Information Systems for Crisis Response and Management, ISCRAM.
Abstract: This paper examines inter-organizational governance within the context of a County wide Emergency Medical Services (EMS) system. Through a case study approach that included an action research methodology, this paper reports research findings on how one multi-organizational EMS system in California designed a process to establish an inter-organizational IT governance structure. The process resulted in EMS stakeholders defining architectural qualities that could be used to drive the EMS enterprise to a higher level of architecture maturity. That is, away from inherent business silos and towards greater levels of standardization and integration of information and technology across all stakeholder groups. The San Mateo County, CA Emergency Medical Services (EMS) system provided the case study context to better understand characteristics of a high performing emergency response system. The unique governance structure of this case allowed researchers to formulate a preliminary understanding of what IT governance is within this context and how it plays a role within private and not-for-profit sector large-scale, inter-organizational, emergency response systems. We applied the time critical information services (TCIS) framework to the specific setting of the San Mateo EMS strategic redesign initiative. The TCIS framework was used to drive roundtable discussions and in addition to obtaining a better understanding of the governance dimension, much was also learned about the operational and organizational dimensions of a high performing emergency response system. From these discussions, a set of 11 key findings were developed in order to guide the county's procurement strategy and future strategic direction. The impact of these findings is that they will be used to formulate public and private sector service contracts that will remain in effect for the next 10 years.
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David Mendonça, & Frank Fiedrich. (2004). Design for improvisation in computer-based emergency response systems. In B. C. B. Van de Walle (Ed.), Proceedings of ISCRAM 2004 – 1st International Workshop on Information Systems for Crisis Response and Management (pp. 99–104). Brussels: Royal Flemish Academy of Belgium.
Abstract: This paper explores the design of training environments in which emergency response professionals can use information technologies to train for responding to unplanned-for situations. This approach – designing for improvisation – is fundamentally different than designing for plan execution. In this paper, we identify three dimensions of this difference and outline a set of research questions that are intended to lead to a better understanding of the role of improvisation in emergency response, as well as how it can be trained for and supported. Both questions are intertwined, since without a firm understanding of how improvisation occurs it is difficult to train for and support it. © Proceedings ISCRAM 2004.
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Kayvan Yousefi Mojir, & Sofie Pilemalm. (2013). A framework for new actors in emergency response systems. In J. Geldermann and T. Müller S. Fortier F. F. T. Comes (Ed.), ISCRAM 2013 Conference Proceedings – 10th International Conference on Information Systems for Crisis Response and Management (pp. 741–746). KIT; Baden-Baden: Karlsruher Institut fur Technologie.
Abstract: Using actors from different societal sectors can improve the response operation quality in emergency management. The different roles, tasks and responsibilities these actors have in response operations and the legal frameworks they work within influence their needs for proper information system support. There is thus a substantial need to study and systemize the concept of “new actors” before providing them with technical solutions. In this study, a framework is constructed showing 14 dimensions of new actors that need to be considered when new actors are studied in more detail.
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Kayvan Yousefi Mojir, & Sofie Pilemalm. (2014). Emerging communities of collaboration: Co-location in emergency response systems in the 'Safety house' in Sweden. In and P.C. Shih. L. Plotnick M. S. P. S.R. Hiltz (Ed.), ISCRAM 2014 Conference Proceedings – 11th International Conference on Information Systems for Crisis Response and Management (pp. 546–555). University Park, PA: The Pennsylvania State University.
Abstract: Co-location as a form of network governance is a way of organizing response teams when responding to an emergency situation. At the 'Safety house' in the province of Jämtland in Sweden main emergency response actors and supporting actors work together in a shared physical place in order to facilitate the process of cooperation and joint decision making. In order to identify the strengths, weaknesses, obstacles, needs and information system role, we explored this case by looking at how the involved actors experience this new working context. We applied an analytical framework developed specifically for new forms of emergency response. It was found that co-location of actors increases the efficiency in using professional response resources and shortens the emergency response time. Information systems can have a significant role in improving the collaboration between actors at the 'Safety house'. However secrecy issues, the problem of control and politics and the evaluation of the performance of actors are major challenges which face further development of the co-location concept.
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Alec Pawling, Tim Schoenharl, Ping Yan, & Greg Madey. (2008). WIPER: An emergency response system. In B. V. de W. F. Fiedrich (Ed.), Proceedings of ISCRAM 2008 – 5th International Conference on Information Systems for Crisis Response and Management (pp. 702–710). Washington, DC: Information Systems for Crisis Response and Management, ISCRAM.
Abstract: This paper describes the WIPER system, a proof of concept prototype, and progress made on its development to date. WIPER is intended to provide emergency response managers with an integrated system that detects possible emergencies from cellular communication data, attempts to predict the development of emergency situations, and provides tools for evaluating possible courses of action in dealing with emergency situations. We describe algorithms for detecting anomalies in streaming cellular communication network data, the implementation of a simulation system that validates running simulations with new real world data, and a web-based front end to the WIPER system. We also discuss issues relating to the real-time aggregation of data from the cellular service provider and its distribution to components of the WIPER system.
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Tim Schoenharl, Greg Madey, Gábor Szabó, & Albert-László Barabási. (2006). WIPER: A multi-agent system for emergency response. In M. T. B. Van de Walle (Ed.), Proceedings of ISCRAM 2006 – 3rd International Conference on Information Systems for Crisis Response and Management (pp. 282–287). Newark, NJ: Royal Flemish Academy of Belgium.
Abstract: This paper describes the proposed WIPER system. WIPER is intended to provide emergency planners and responders with an integrated system that will help to detect possible emergencies, as well as to suggest and evaluate possible courses of action to deal with the emergency. The system is designed as a multi-agent system using web services and the service oriented architecture. Components of the system for detecting and mitigating emergency situations can be added and removed from the system as the need arises. WIPER is designed to evaluate potential plans of action using a series of GIS enabled Agent-Based simulations that are grounded on realtime data from cell phone network providers. The system relies on the DDDAS concept, the interactive use of partial aggregate and detailed realtime data to continuously update the system and allow emergency planners to stay updated on the situation. The interaction with the system is done using a web-based interface and is composed of several overlaid layers of information, allowing users rich detail and flexibility.
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Steven C. Way, & Yufei Yuan. (2012). Towards a context-aware multi-party emergency coordination system framework. In Z.Franco J. R. L. Rothkrantz (Ed.), ISCRAM 2012 Conference Proceedings – 9th International Conference on Information Systems for Crisis Response and Management. Vancouver, BC: Simon Fraser University.
Abstract: A framework for an emergency response system is proposed which is an extension of, but significantly different from, traditional group and distributed group support systems. The framework considers the environmental, organizational, and activity-based issues of emergency response for responders and decision makers. These issues are addressed by incorporating context-aware, multi-agency relationship management, and multiparty coordination components into the framework for a context-aware multiparty coordination system. © 2012 ISCRAM.
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Felix Wex, Guido Schryen, & Dirk Neumann. (2011). Intelligent decision support for centralized coordination during Emergency Response. In E. Portela L. S. M.A. Santos (Ed.), 8th International Conference on Information Systems for Crisis Response and Management: From Early-Warning Systems to Preparedness and Training, ISCRAM 2011. Lisbon: Information Systems for Crisis Response and Management, ISCRAM.
Abstract: Automated coordination is regarded as a novel approaches in Emergency Response Systems (ERS), and especially resource allocation has been understudied in former research. The contribution of this paper is the introduction of two variants of a novel resource allocation mechanism that provide decision support to the centralized Emergency Operations Center (EOC). Two quantitative models are computationally validated using real-time, data-driven, Monte-Carlo simulations promoting reliable propositions of distributed resource allocations and schedules. Various requirements are derived through a literature analysis. Comparative analyses attest that the Monte-Carlo approach outperforms a well-defined benchmark.
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Connie White, Murray Turoff, & Bartel A. Van De Walle. (2007). A dynamic delphi process utilizing a modified thurstone scaling method: Collaborative judgement in emergency response. In K. Nieuwenhuis P. B. B. Van de Walle (Ed.), Intelligent Human Computer Systems for Crisis Response and Management, ISCRAM 2007 Academic Proceedings Papers (pp. 7–15). Delft: Information Systems for Crisis Response and Management, ISCRAM.
Abstract: In an extreme event or major disaster, very often there are both alternative actions that might be considered and far more requests for actions than can be executed immediately. The relative desirability of each option for action could be a collaborative expression of a significant number of emergency managers and experts trying to manage the most desirable alternatives at any given time, in real time. Delphi characteristics can satisfy these needs given that anyone can vote or change their vote on any two options, and voting and scaling are used to promote a group understanding. Further utilized with Thurstone's Law of Comparative Judgment, a group decision or the range of acceptability a group is willing to consent to, can be calculated and utilized as a means of producing the best decision. A ubiquitous system for expeditious real-time decision making by large virtual teams in emergency response environments is described.
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Philip Fei Wu. (2009). User acceptance of emergency alert technology: A case study. In S. J. J. Landgren (Ed.), ISCRAM 2009 – 6th International Conference on Information Systems for Crisis Response and Management: Boundary Spanning Initiatives and New Perspectives. Gothenburg: Information Systems for Crisis Response and Management, ISCRAM.
Abstract: The purpose of the study is to investigate the factors affecting the user acceptance of emergency alert systems. By studying the adoption of a SMS-based alert system at a large public university in the United States, this paper explores the research question: How are different motivational factors related to the intention and behavior of using emergency alert technology? Through a mixed-methods approach, the study demonstrates a “deepening” effort in applying the technology acceptance model (TAM) to emergency response system, drawing attention to the holistic nature of motivation-behavior in technology acceptance. Results of this research show that: The concept of usefulness has multiple levels of meanings to its intended users; the ease of use is more about the users' ability to control the system behavior; and subjective norm need to be examined with relation to its originating source.
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Philip Fei Wu, Yan Qu, Jennifer Preece, Kenneth R. Fleischmann, Jennifer Golbeck, Paul T. Jaeger, et al. (2008). Community response grid (CRG) for a university campus: Design requirements and implications. In B. V. de W. F. Fiedrich (Ed.), Proceedings of ISCRAM 2008 – 5th International Conference on Information Systems for Crisis Response and Management (pp. 34–43). Washington, DC: Information Systems for Crisis Response and Management, ISCRAM.
Abstract: This paper describes the initial stages of the participatory design of a community-oriented emergency response system for a university campus. After reviewing related work and the current University emergency response system, this paper describes our participatory design process, discusses initial findings from a design requirement survey and from our interactions with different stakeholders, and proposes a Web interface design for a community response grid system. The prototyping of the system demonstrates the possibility of fostering a social-network-based community participation in emergency response, and also identifies concerns raised by potential users and by the professional responder community.
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Shuyan Xie, & Markus Helfert. (2011). Towards an information architecture oriented framework for emergency response system. In E. Portela L. S. M.A. Santos (Ed.), 8th International Conference on Information Systems for Crisis Response and Management: From Early-Warning Systems to Preparedness and Training, ISCRAM 2011. Lisbon: Information Systems for Crisis Response and Management, ISCRAM.
Abstract: Emergency, situations characterized as high consequence, low probability, and short decision time, create a unique decision-making environment that must be conscientiously supported. Historically, one of the techniques business has used to improve complex processes is a maturity model. Organizations should create the capabilities to react to information sharing needs in advance, not react an ad hoc manner to the information crisis. Based on the IT-Capability Maturity Framework (IT-CMF), we detailed some aspects of this model from an information architectural perspective to examine a country wide emergency service. Although information system and information technology (ISIT) have been emphasized in emergency management system, architectural aspects- a structure emphasized semantic description however have been of limited considerations. We propose a framework to analyzing architectural aspects for information sharing that can help improve emergency response system. The framework is discussed and exemplified with a case study. We conclude that the proposed framework provides a deeper understanding of information in use from technical and managerial aspects during emergency response. Guideline for further improvement will be the focus in our future work.
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X.L. Zhang, Jian Guo Chen, Guofeng Su, & Hongyong Yuan. (2013). Study on source inversion technology for nuclear accidents based on gaussian puff model and ENKF. In J. Geldermann and T. Müller S. Fortier F. F. T. Comes (Ed.), ISCRAM 2013 Conference Proceedings – 10th International Conference on Information Systems for Crisis Response and Management (pp. 634–639). KIT; Baden-Baden: Karlsruher Institut fur Technologie.
Abstract: For nuclear power plant (NPP) accident, the assessment of the radiation consequences plays an important role in the emergency response system. However, the source characteristics which greatly influence thhe accuracy of the assessment result is poorly known or even unknown at the early phase of accident, wich can cause poorly understanding of the situation and delay the response activities. In this paper, source inversion technology in analyzing nuclear accidents based on Gaussian puff model and ensemble Kalman filter (EnKF) is proposed. The method is validated with simulated measurements and the results show that it can give reasonable estimations of the change in release rate and height simultaneously, though the first guess of release rate is 102 larger than the true value. The investigation of the influence of sharp change in source term shows that the method is robust to capture the sharp change, but there is a delay of response when the release height increases simultaneously.
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