Optimal location of exit doors for efficient evacuation of crowds at gathering places

This work deals with the optimal design for the location of the exit doors at meeting places (such as sports centers, public squares, street markets, transport stations, etc.) to guarantee a safer emergency evacuation in events of a sporting, social, entertainment or religious type. This problem is stated as an optimal control problem of nonlinear partial differential equations, where the state system is a reformulation of the Hughes model (coupling the eikonal equation for a density-weighted walking velocity of pedestrians and the continuity equation for conservation of the pedestrian density), the control is the location of the exit doors at the domain boundary (subject to several geometric constraints), and the cost function is related to the evacuation rate. We provide a full numerical algorithm for solving the problem (a finite element technique for the discretization and a gradient-free procedure for the optimization), and show several numerical results for a realistic case.Ministerio de Ciencia e Innovación | Ref. TED2021-129324B-I00Sistema Nacional de Investigadores, México | Ref. SNI-52768Programa para el Desarrollo Profesional Docente (México) | Ref. PRODEP/103.5/16/8066CONACyT | Ref. 21755

The effect of person order on egress time: a simulation model of evacuation from a neolithic visitor attraction.

Objective: The aim of this study was to model the egress of visitors from a Neolithic visitor attraction. Background: Tourism attracts increasing numbers of elderly and mobility-impaired visitors to our built-environment heritage sites. Some such sites have very limited and awkward access, were not designed for mass visitation, and may not be modifiable to facilitate disabled access. As a result, emergency evacuation planning must take cognizance of robust information, and in this study we aimed to establish the effect of visitor position on egress. Method: Direct observation of three tours at Maeshowe, Orkney, informed typical time of able-bodied individuals and a mobility-impaired person through the 10-m access tunnel. This observation informed the design of egress and evacuation models running on the Unity gaming platform. Results: A slow-moving person at the observed speed typically increased time to safety of 20 people by 170% and reduced the advantage offered by closer tunnel separation by 26%. Using speeds for size-specific characters of 50th, 95th, and 99th percentiles increased time to safety in emergency evacuation by 51% compared with able-bodied individuals. Conclusion: Larger individuals may slow egress times of a group; however, a single slow-moving mobility-impaired person exerts a greater influence on group egress, profoundly influencing those behind. Application: Unidirectional routes in historic buildings and other visitor attractions are vulnerable to slow-moving visitors during egress. The model presented in this study is scalable, is applicable to other buildings, and can be used as part of a risk assessment and emergency evacuation plan in future work

Optimal exit configuration of factory layout for a safer emergency evacuation using crowd simulation model and multi-objective artificial bee colony optimization

This work aims at providing a systematic method in producing a safer and optimal factory layout based on a crowd simulation model and the multi-objective artificial bee colony optimization technique. Apart, from ensuring the efficiency of manufacturing processes in planning a factory layout, it is also important that the safety aspect is taken into account. A factory is usually a closed working area consisting of machines, equipment, assembly lines as well as individual working space and other departments within the factory. In this environment, workers move around in the factory to perform different activities, and hence highly complex crowd behaviours that are influenced by the physical, social and psychological factors of the crowd might take place. Therefore, the layout of the factory must be carefully designed so that efficient movements of people can be obtained. Furthermore, during emergency situations that require efficient evacuation of workers from the factory building, a good factory layout will prevent or minimize the possibility of injuries during the evacuation process. This will reduce the evacuation egress time, which is the quantity used to evaluate the evacuation efficiency and the building's level of safety. One of the techniques to assess the evacuation efficiency of a particular space configuration is by using the crowd simulation model. Recent evidences suggest that the representation of crowd dynamics using a simulation model is useful, where experiments with real humans are too dangerous and not practical to be implemented. This work explains the method to provide optimal exit door configurations for a factory layout by analyzing the crowd evacuation time and the discomfort level, where the proposed optimum exit configurations will be compared with the original configuration for a better evacuation efficiency

From mindless masses to small groups: Conceptualizing collective behavior in crowd modeling.

Computer simulations are increasingly used to monitor and predict behavior at large crowd events, such as mass gatherings, festivals and evacuations. We critically examine the crowd modeling literature and call for future simulations of crowd behavior to be based more closely on findings from current social psychological research. A systematic review was conducted on the crowd modeling literature (N = 140 articles) to identify the assumptions about crowd behavior that modelers use in their simulations. Articles were coded according to the way in which crowd structure was modeled. It was found that 2 broad types are used: mass approaches and small group approaches. However, neither the mass nor the small group approaches can accurately simulate the large collective behavior that has been found in extensive empirical research on crowd events. We argue that to model crowd behavior realistically, simulations must use methods which allow crowd members to identify with each other, as suggested by self-categorization theory

2009 GREAT Day Program

SUNY Geneseo’s Third Annual GREAT Day.https://knightscholar.geneseo.edu/program-2007/1003/thumbnail.jp

Applied Metaheuristic Computing

For decades, Applied Metaheuristic Computing (AMC) has been a prevailing optimization technique for tackling perplexing engineering and business problems, such as scheduling, routing, ordering, bin packing, assignment, facility layout planning, among others. This is partly because the classic exact methods are constrained with prior assumptions, and partly due to the heuristics being problem-dependent and lacking generalization. AMC, on the contrary, guides the course of low-level heuristics to search beyond the local optimality, which impairs the capability of traditional computation methods. This topic series has collected quality papers proposing cutting-edge methodology and innovative applications which drive the advances of AMC

Leveraging the city: urban governance in financial capitalism

The project examines the proliferation of high-rise luxury towers and real estate investment to understand the transformations of urban governance under financial capitalism. For both the city and finance, urban space is of central importance. For the city, it is the place of interactions, public life and culture, markets, corporate activities, and residential life. For finance, it is the site that makes for valuable real estate invested directly through specific projects and indirectly through financial instruments. Both luxury towers and real estate investment are crucial sites of financialization of urban space which reveal the accompanying transnational transformations of urban governance. The project makes three broad, interrelated claims. First, cities play a significant yet under-appreciated role in financial capitalism because of their power to regulate urban real estate. Second, the increasing integration of urban real estate into the global economy through financial instruments changes who is governing urban space and how it is being governed. Third, through the pursuit of urban space by the various actors acting in the interests of finance, the idea of the public itself is being re-imagined. In making those claims, it first provides a conceptual account of financialization and urban governance in relation to real estate and urban space. It then tells a story of the loosening of global capital controls and the institution of property regimes to protect foreign investors, how much of that investment has “landed” in cities and in real estate in particular, and how urban spaces around the world are being turned into instruments of financial speculation at the same time that individual and cultural subjectivities are shifting towards that of finance. It substantiates the connection between financial capitalism and real estate by exploring various mechanisms through which capital was channeled into international forms of investment and securitized financial instruments which relied on real estate for their underlying symbolic or actual assets. It examines the transformation of urban governance through two case studies: Newham, United Kingdom, and Gurgaon, India, each illustrating different instantiations of the encounter between financial capitalism and local government

Film Noir as the Sovereign-Image of Empire: Cynicism, White Male Biopolitics, and the Neoliberal Cinematic Apparatus

This dissertation develops a theory of film noir as sovereign-image, a meta-generic and meta-cinematic discourse that confronts the viewer with the biopolitical ambivalence of the cinematic apparatus but enjoins her to nonetheless affirm its normative use. I argue that classical American noir deploys a proto-neoliberal ideology to turn the indeterminacy at its core into a spectacle of victimized white men, offering emphatically gendered and racialized images of a pathological entrepreneur of the self who is not ashamed to exhibit his wounded private life as the source of his singular market value. I claim, however, that even in his fully developed contemporary form in which his classical predecessors trauma induced shamelessness turns into a cynically calculated affective display, noirs neoliberal hero is not the self-made man he appears to be but remains delegated by a homosocial group to be the sovereign arbiter of their lifes value for them, instead of them. As an individual whonot unlike the film vieweris temporarily isolated from his peers he is in the exceptional position to freely decide what kind of life to consider productive for the process of capital accumulation, turning his body into the arbitrary link between what Agamben calls bare life and a qualified form of lifea link I call the sovereign-image. I track the evolution of film noirs sovereign function alongside the expansion and transformation of the United States from a territorialized nation state to a deterritorialized global financial network (what Hardt and Negri call Empire) to shed light on how Hollywoods anomalous noir crisis, its war trauma induced state of exception, became the expression of the governing paradigm of unbridled global biocapitalism in the age of North Atlantic unilateralism. In contemporary neo-noirs like The Usual Suspects (1995), Trainspotting (1996), Inception (2010), Fight Club (1999), or Drive (2011) becoming a self-made neoliberal subject coincides with gaining membership in a hybrid and flexible white male bios, the old-new flesh of Empire now cynically framed as the condition of possibility for autonomous selfhood as such. In critiquing neo-noirs cynical paradigm I demonstrate that its reactionary force can be mobilized only if the films first construct a biopolitical zone of indistinction where the inevitability of the western capitalo-patriarchal status quo is questioned and the equality of all forms of life is posited