Journal articles on the topic 'Spatial occupancy representations'

Abstract. Integration and analysis of real-time and historic sensor data provides important insights into the operational status of buildings. There is a need for the integration of sensor data and digital representations of the built environment for furthering stakeholder engagement within the realms of Real Estate 4.0 and Facility Management (FM), especially in a spatial representation context. In this paper, we propose a general system architecture that integrates point cloud data and sensor data for visualization and analysis. We further present a prototypical web-based implementation of that architecture and demonstrate its application for the integration and visualization of sensor data from a typical office building, with the aim to communicate and analyze occupant comfort. The empirical results obtained from our prototypical implementation demonstrate the feasibility of our approach for the provisioning of light-weight software components for the service-oriented integration of Building Information Modeling (BIM), Building Automation Systems (BASs), Integrated Workplace Management Systems (IWMSs), and future Digital Twin (DT) platforms.

The role of geometrical modeling is of increasing importance in the field of CAD/CAM. In the present paper a new concept is presented for geometric modeling of the data structure using volumetric representation via switching functions in a Gray coded space (3-D Karnaugh map). The data structure consists of a single generic cuboid primitive which may vary in size and aspect ratios. This provides for more generalized and flexible object representation than uniform spatial occupancy enumeration. The combination of a single primitive, Gray coded space, and representation via switching functions yields a very efficient data structure oriented toward set operations which can be carried out via a simple assembler program or a parallel logic processor. As objects are represented by a nonhierarchial list of fixed format terms, uniform algorithms can be used to perform given tasks regardless of object shape, dimensions, or complexity.

The explosive data growth in the current information age requires consistent new methodologies harmonized with the new IoT era for data analysis in a space–time context. Moreover, intuitive data visualization is a central feature in exploring, interpreting, and extracting specific insights for subsequent numerical data representation. This integrated process is normally based on the definition of relevant metrics and specific performance indicators, both computed upon continuous real-time data, considering the specificities of a particular application case for data validation. This article presents an IoT-oriented evaluation tool for Radon Risk Management (RRM), based on the design of a simple and intuitive Indoor Radon Risk Exposure Indicator (IRREI), specifically tailored to be used as a decision-making aid tool for building owners, building designers, and buildings managers, or simply as an alert flag for the problem awareness of ordinary citizens. The proposed methodology was designed for graphic representation aligned with the requirements of the current IoT age, i.e., the methodology is robust enough for continuous data collection with specific Spatio-temporal attributes and, therefore, a set of adequate Radon risk-related metrics can be extracted and proposed. Metrics are summarized considering the application case, taken as a case study for data validation, by including relevant variables to frame the study, such as the regulatory International Commission on Radiological Protection (ICRP) dosimetric limits, building occupancy (spatial dimension), and occupants’ exposure periods (temporal dimension). This work has the following main contributions: (1) providing a historical perspective regarding RRM indicator evolution along time; (2) outlining both the formulation and the validation of the proposed IRREI indicator; (3) implementing an IoT-oriented methodology for an RRM indicator; and (4) a discussion on Radon risk public perception, undertaken based on the results obtained after assessment of the IRREI indicator by applying a screening questionnaire with a total of 873 valid answers.

Urban energy mapping plays a crucial role in benchmarking the energy performance of buildings for many stakeholders. This study examined a set of buildings in the city of Borlänge, Sweden, owned by the municipality. The aim was to present a digital spatial map of both electricity use and district heating demand in the spatial–temporal dimension. A toolkit for top-down data processing and analysis was considered based on the energy performance database of municipality-owned buildings. The data were initially cleaned, transformed and geocoded using custom scripts and an application program interface (API) for OpenStreetMap and Google Maps. The dataset consisted of 228 and 105 geocoded addresses for, respectively, electricity and district heating monthly consumption for the year 2018. A number of extra parameters were manually incorporated to this data, i.e., the total floor area, the building year of construction and occupancy ratio. The electricity use and heating demand in the building samples were about 24.47 kWh/m2 and 268.78 kWh/m2, respectively, for which great potential for saving heating energy was observed. Compared to the electricity use, the district heating showed a more homogenous pattern following the changes of the seasons. The digital mapping revealed a spatial representation of identifiable hotspots for electricity uses in high-occupancy/density areas and for district heating needs in districts with buildings mostly constructed before 1980. These results provide a comprehensive means of understanding the existing energy distributions for stakeholders and energy advisors. They also facilitate strategy geared towards future energy planning in the city, such as energy benchmarking policies.

The vast amount of data robots can capture today motivates the development of fast and scalable statistical tools to model the space the robot operates in. We devise a new technique for environment representation through continuous occupancy mapping that improves on the popular occupancy grip maps in two fundamental aspects: (1) it does not assume an a priori discrimination of the world into grid cells and therefore can provide maps at an arbitrary resolution; (2) it captures spatial relationships between measurements naturally, thus being more robust to outliers and possessing better generalization performance. The technique, named Hilbert maps, is based on the computation of fast kernel approximations that project the data in a Hilbert space where a logistic regression classifier is learnt. We show that this approach allows for efficient stochastic gradient optimization where each measurement is only processed once during learning in an online manner. We present results with three types of approximations: random Fourier; Nyström; and a novel sparse projection. We also extend the approach to accept probability distributions as inputs, for example, due to uncertainty over the position of laser scans due to sensor or localization errors. In this extended version, experiments were conducted in two dimensions and three dimensions, using popular benchmark datasets. Furthermore, an analysis of the adaptive capabilities of the technique to handle large changes in the data, such as trajectory update before and after loop closure during simultaneous localization and mapping, is also included.

Spatial orientation is a substantial component of the sense of presence in real and virtual environments. Virtual environments have amazing versatility in terms of the possible modes of “entering” them, the positions occupants can take up within or in relation to them, and the ways virtual environments can be embedded within real ones. A virtual environment that differs too sharply in these respects from the normal terrestrial environment may challenge users' abilities to develop spatial orientation and a sense of presence within it, and to acquire spatial training that will transfer to real situations. We learned this fact while analyzing spatial orientation and presence in a variety of real experimental environments, including ones involving nonterrestrial gravitoinertial force backgrounds. One environment we investigated was “microgravity,” in which subjects can free float and be exposed to unique visual perspectives and patterns of touch and pressure cues on the body surface. A second was a rotating “artificial gravity” environment embedded within the larger context of a stationary laboratory complex. Our observations emphasize visual, vestibular, and somesthetic cues in construction of spatial representations of familiar environments. However, we have found that multiple levels of such representations exist, which interact with larger spatial constructs. The cognitive map of an environment depends on its represented embedding within associated environments and the directionality of modes of access between them. This dependency is reflected in the “wrong door phenomenon” that results when an individual enters a familiar environment from a nonfamiliar access position and becomes disoriented.

The paper follows-up ongoing research focusing on the potential of machine-readable data as additional knowledge in the governance of local tourism and destination management organizations (DMOs) in Slovakia. The current focus is on one classic social media (Facebook), one location-based social media (Foursquare), two hybrid travel-related platforms with partial attributes of reservation services (Google Places, TripAdvisor), and two online reservation services (Booking, Airbnb). The global aim is the usage of extracted data for the identification of additional entities with the obligation of local occupancy taxation, which is the financial backbone of Slovak (DMOs). A set of simple and globally reusable scripts constructed in Python and PostgreSQL were used to extract data on lodging providers from the Google Places application programming interface (API), the Facebook Place Search API and the Foursquare Venue API over grid overlays of districts’ spatial representation. For pure scientific purposes in the case of Tripadvisor, Booking, and Airbnb, with no suitable access to open APIs, web scraping methods were used for data extraction. The pilot case was applied in the boundaries of Kosice city (Slovakia), and the aggregations of processed data were compared with official open statistics. Results indicate that the automated continuous monitoring of online platforms could help local public administrations in decreasing occupancy tax evasions and even widen knowledge about online audiences and visitors’ satisfaction.

The persistence of pollinators in a given habitat is determined in part by traits that affect their response to environmental variables. Here, we show that climate and habitat features are the main drivers of trait distribution in bees across spatially separated habitats. We determined that trait and clade filtering results in bee assemblages in Western Canada exhibiting clustering that is correlated with differences in temperature, humidity, and rainfall. Phylogenetic signals were detected in all traits associated with pollinator life-history strategies, including phenology. The Bombus Latreille, 1802 clade (including the social parasite subgenus Psithyrus Lepeletier, 1833) comprised a higher proportion of prairie bees, whereas assemblages in Garry oak sites exhibited higher representation from solitary bees (e.g., genera Osmia Panzer, 1806, Andrena Fabricius, 1775, Ceratina Latreille, 1802). Because these same traits influence which plant species are pollinated, this selective environmental occupancy within the two different habitats could promote local adaptation of flowering plant species pollinated by more social clades in prairies and more solitary bees in Garry oak.

AbstractUrban forests are conformed by a variable representation of native and exotic species. Because these species differ in the morpho-functional traits that possess, they may have a differential participation in the provision of ecosystem services in cities. Here, we compare ecosystem services inferred from morpho-functional traits of native and exotic tree species present in Santiago, Chile. Five traits associated with ecosystem services valuation (Vi) were scored (1 versus 0), and compared between native and exotic tree species, weighting those ecosystem services according to multi-criteria decision analysis procedure (MCDA). We found that native and exotic species did not have significant differences in the ecosystem services provided to urban dwellers (F = 1.2; P > 0.05); but these results were obtained when ecosystem services were not weighted according to their demand in Santiago. When weights were pondered, native species provided more ecosystem services than did exotic trees (F = 7.1; P < 0.008). Complementarily, we also found that the ecosystem services ranked for native and exotic species did not correlate with their spatial distribution (occupancy, Oi). These results highlight the need to use criteria based on ecosystem services to tree planting in Santiago, prioritizing native species because, in comparison to exotic ones, they provide more ecosystem services demanded city dwellers.

Abstract The mixed-conifer forests in California’s Sierra Nevada include species from several genera (Pinus, Abies, Pseudotsuga, Calocedrus and Sequoiadendron). These forests have complex disturbance regimes dominated by low to moderate severity fire that often resulted in patchy spatial patterns and multiaged stands. Leaf area index (LAI) describes the total leaf surface area per unit area in a forest community and is related to wood and biomass production and ecosystem values such as water usage, water yields and carbon sequestration. LAI can also serve as a representation of growing space occupancy and the basis for stocking control, including in multiaged stands. Nine study sites were sampled with 22–37 0.05 ha plots per study site to estimate LAI and other metrics. LAI was highest in study sites with greater proportions of shade tolerant Abies and Calocedrus species and on higher productivity sites. Recent drought-related mortality has reduced stocking and LAI. The combination of fire suppression and timber harvest over the past century has resulted in stands with higher densities, and greater proportions of shade tolerant species. Managing these structures to restore their presettlement character will involve reducing overall stocking, increasing proportions of intolerant species and increasing fine-scale heterogeneity. LAI allocation—allocating leaf area to age classes, species or canopy strata—can be used to design new structures that resemble presettlement structures and are resilient to disturbances.

Abstract. The world is facing the second year of the Covid-19 global pandemic that has affected many around the world. Despite the challenges, ISPRS is organizing its second consecutive virtual Congress to motivate, inspire and connect geospatial researchers around the globe to share the knowledge and communicate their research results. This year Commission IV shares the successful research endeavours of many members of working groups and their graduate students and research teams.In the years since the XXIII ISPRS congress, 2016, there have been many important developments. Managing the social and economic challenges brought by increased complexity and interconnectivity of activities in human society requires new dimensions of analysing information and specifically spatial information. The increased pressure on the usage of geographic space, maintaining sustainable development and creating liveable community environments increases the requirements for spatial decision-making tools. The last years of Covid-19 restrictions and lockdowns pose a range of new challenges to spatial information such as occupancy estimations, efficient use of building space and safe navigation within buildings. The focus on dynamic changes and analysing real-time sensor data is increasing. The developments of Spatial Digital Twins are maturing in the context of providing tools and methods for high density human settlements to be more resilient, sustainable, liveable, and safe.Commission IV Spatial Information Science (2016–2022) is dedicated to advance research activities in spatial information sciences for modelling, structuring, management, analysis, visualization and simulation of (big) data with focus on the third spatial dimension and taking into consideration dynamic changes. Special attention is given to linking information about real-world physical phenomena with societal, governmental, organizational and legal information in order to address the complexity of issues in their entirety. The Commission has contributed to advancements in data modelling, data fusion and management, visualization (web-based, VR and AR), simulation and city analytics, and 3D applications. The work had largely been implemented in cooperation with international organizations such as FIG, UDMS, 3DGeoinfo, ICA, OGC, ISO and Web3D.The Commission consists of 10 scientific areas of research that is coordinated by 10 working groups (WG) and one inter commission working group (ICWG) as follows – WG1: Multidimensional spatial models; WG2: Ontologies, semantics and knowledge representation for geospatial information; WG3: Spatial data analysis, statistic and uncertainty modelling; WG4: Collaborative crowdsourced cloud mapping (C3M); WG5: Indoor/outdoor seamless modelling, LBS and mobility; WG6: SDI: Internet of things and spatial decision support; WG7: Geo-data management; WG8: Geo-computation and geo-simulation; WG9: Geovisualisation, augmented and virtual reality; WG10: Advanced geospatial applications for smart cities and regions; ICWG IV/III: Global mapping: updating, verification and interoperability.The papers received for the ISPRS virtual event reflect the above-mentioned scientific research areas. The reported research ranges from advancements in new and emerging theories, through experiments and analysis to demonstration of technologies in different applications. The research was captured through papers and abstracts published in the collection of ISPRS Annals and ISPRS Archives. The ISPRS Annals contain 24 papers and the ISPRS Archives contain 56 papers. The diversity of the research presented in the published papers clearly indicates the wide range of topics within the field of Spatial Information Science. A rigorous peer-review process by the ISPRS TC IV Scientific Committee contributed to high quality proceedings.In closing we would like to note the commission’s plans for the upcoming year. Because the pandemic has forced many to work remotely, we have been motivated to find new ways to remain informed of changes in the work of the commission and working groups. The commission plans to host monthly webinars at which working groups can showcase their activities and achievements. We hope that this will generate greater interest in the work of the commission and enhance the profile of the commission’s working groups.

Abstract. The world is facing the second year of the Covid-19 global pandemic that has affected many around the world. Despite the challenges, ISPRS is organizing its second consecutive virtual Congress to motivate, inspire and connect geospatial researchers around the globe to share the knowledge and communicate their research results. This year Commission IV shares the successful research endeavours of many members of working groups and their graduate students and research teams.In the years since the XXIII ISPRS congress, 2016, there have been many important developments. Managing the social and economic challenges brought by increased complexity and interconnectivity of activities in human society requires new dimensions of analysing information and specifically spatial information. The increased pressure on the usage of geographic space, maintaining sustainable development and creating liveable community environments increases the requirements for spatial decision-making tools. The last years of Covid-19 restrictions and lockdowns pose a range of new challenges to spatial information such as occupancy estimations, efficient use of building space and safe navigation within buildings. The focus on dynamic changes and analysing real-time sensor data is increasing. The developments of Spatial Digital Twins are maturing in the context of providing tools and methods for high density human settlements to be more resilient, sustainable, liveable, and safe.Commission IV Spatial Information Science (2016–2022) is dedicated to advance research activities in spatial information sciences for modelling, structuring, management, analysis, visualization and simulation of (big) data with focus on the third spatial dimension and taking into consideration dynamic changes. Special attention is given to linking information about real-world physical phenomena with societal, governmental, organizational and legal information in order to address the complexity of issues in their entirety. The Commission has contributed to advancements in data modelling, data fusion and management, visualization (web-based, VR and AR), simulation and city analytics, and 3D applications. The work had largely been implemented in cooperation with international organizations such as FIG, UDMS, 3DGeoinfo, ICA, OGC, ISO and Web3D.The Commission consists of 10 scientific areas of research that is coordinated by 10 working groups (WG) and one inter commission working group (ICWG) as follows – WG1: Multidimensional spatial models; WG2: Ontologies, semantics and knowledge representation for geospatial information; WG3: Spatial data analysis, statistic and uncertainty modelling; WG4: Collaborative crowdsourced cloud mapping (C3M); WG5: Indoor/outdoor seamless modelling, LBS and mobility; WG6: SDI: Internet of things and spatial decision support; WG7: Geo-data management; WG8: Geo-computation and geo-simulation; WG9: Geovisualisation, augmented and virtual reality; WG10: Advanced geospatial applications for smart cities and regions; ICWG IV/III: Global mapping: updating, verification and interoperability.The papers received for the ISPRS virtual event reflect the above-mentioned scientific research areas. The reported research ranges from advancements in new and emerging theories, through experiments and analysis to demonstration of technologies in different applications. The research was captured through papers and abstracts published in the collection of ISPRS Annals and ISPRS Archives. The ISPRS Annals contain 24 papers and the ISPRS Archives contain 56 papers. The diversity of the research presented in the published papers clearly indicates the wide range of topics within the field of Spatial Information Science. A rigorous peer-review process by the ISPRS TC IV Scientific Committee contributed to high quality proceedings.In closing we would like to note the commission’s plans for the upcoming year. Because the pandemic has forced many to work remotely, we have been motivated to find new ways to remain informed of changes in the work of the commission and working groups. The commission plans to host monthly webinars at which working groups can showcase their activities and achievements. We hope that this will generate greater interest in the work of the commission and enhance the profile of the commission’s working groups.

Intelligent vehicles face considerable challenges in the complex traffic environment since they need to deal with various constraints and elements. This dissertation puts forward a novel trajectory planning framework for intelligent vehicles to generate safe and optimal driving trajectories. First, we design a spatiotemporal occupancy framework to deal with all kinds of elements in the complex driving environment based on the Frenét frame. This framework unifies various constraints on the road in the three-dimensional spatiotemporal representation and clearly describes the collision-free configuration space. Then we use the convex approximation method to construct a time-varying convex feasible region based on the above accurate temporal and spatial description. We formulate the trajectory planning problem as a standard quadratic programming formulation with collision-free and dynamics constraints. Finally, we apply the iterative convex optimization algorithm to solve the quadratic programming problem in the time-varying convex feasible region. Moreover, we design several typical experimental scenarios and have verified that the proposed method has good effectiveness and real-time.

As perhaps most obviously evidenced in the political maneuverings that led up to the second Gulf War in 2003, the use of satellite imagery to document spatial terrain is often, and almost instantly, politicized. In the two images presented here, this politicization takes on a two-way relationship and is open to contrasting and inevitably dualistic readings. One way of describing their relationship is as “Target” and “Aftermath”. On the left, we have an image of the nuclear plant near the Iranian city of Qom, annotated in this version by the US security services to highlight ‘suspicious’ activity said to evidence the nuclear ambitions of the Iranian government. On the right, we are presented with an image of Tehran under heavy smog in 2013 released by the Iranian government itself. Although the official Iranian explanation for this smog is the general population density and industrialization of the city, it has now been acknowledged, or is at least extensively argued, that the pollution it documents is a direct result of the economic sanctions imposed by the United States in 2010 that banned the sale of refined fuel to the country. Facing a major energy crisis that would completely stall the economy, the Iranian government opted to produce a “bathtub mix” of far inferior quality oil that has been releasing deadly exhaust into the already dense air of Iran for the past three years. The “Target”, as the first image shows, is Iran’s nuclear program, which lies at the crux of complicated historical animosities currently evident between the US and Iranian governments. Taken at very high resolution (2.5 meters per pixel) from outer space, the image presents itself as tunnel-vision precision — each point is a piece of data and each piece of data details coordinates, date, and time. It is on the back of such supposed satellite precision that the crippling economic sanctions of the US’s policy of containment are justified. However, the aftermath of these sanctions has not been the cessation of Iran’s nuclear program, but rather the suffocation of Tehran. Indeed, it has been argued that the inhabitants of Tehran are almost literally “choking to death”. By the standards of the sanctions’ purported aims, the result seems more an egregious misfire than a successful piece of foreign policy. The reality behind these images and their conflicting ascribed narratives is far from clear. The effects on the people of Iran are also not only equally unclear, they are deliberately hazed. Employing Giorgio Agamben’s notions of the abstraction of the citizen to ‘bare life’ and its corollary of the ‘Camp’ as the 'Nomos' of the Modern, this paper attempts to decipher these images, their politicized readings, and the way in which the sites of human life in and near their locations – the occupants of the city of Qom in the first instance and those of Tehran in the second – have been conspicuously erased. It will argue that this visual erasure from spatial representation has fundamental implications for the human rights of the inhabitants of these cities and, by extension, Iran and a politicized world more generally. In doing so, it will suggest that as spaces and places of political conflict are ever more frequently presented through the medium of the satellite image, a deeply politicized reading of their structures, narratives and spatial representative techniques becomes ever more important.

Working drawings are produced, when a house is designed, to envisage an imagined building. They are a tangible representation of an object that has no tangible existence. These working drawings act as a manual for constructing the house; they represent that which is to be built. The house comes into being, therefore, via this set of drawings. This is known as documentation. However, these drawings record the house at an ideal moment in time; they capture the house in stasis. They do not represent the future life of the house, the changes and traces the inhabitants make upon a space, nor do they document the path of the person, the arc of their actions, within the space of the house. Other types of documentation of the house allow these elements to be included. Documentation that is produced after-the-event, that interprets ‘the existing’, is absent from discourses on documentation; the realm of post factum documentation is a less examined form of documentation. This paper investigates post factum documentation of the house, and the alternative ways of making, producing and, therefore, thinking about, the house that it offers. This acknowledges the body in the space of architecture, and the inhabitation of space, and as a dynamic process. This then leads to the potential of the‘model of an action’ representing the motion and temporality inherent within the house. Architecture may then be seen as that which encloses the inhabitant. The word ‘document’ refers to a record or evidence of events. It implies a chronological sequence: the document comes after-the-event, that is, it is post factum. Within architecture, however, the use of the word documentation, predominantly, refers to working drawings that are made to ‘get to’ a building, drawings being the dominant representation within architecture. Robin Evans calls this notion, of architecture being brought into existence through drawing, the principle of reversed directionality (Evans 1997, 1989). Although it may be said that these types of drawings document the idea, or document the imagined reality of the building, their main emphasis, and reading, is in getting to something. In this case, the term documentation is used, not due to the documents’ placement within a process, of coming after the subject-object, but in referring to the drawings’ role. Other architectural drawings do exist that are a record of what is seen, but these are not the dominant drawing practice within architecture. Documentation within architecture regards the act of drawing as that process upon which the object is wholly dependent for its coming into existence. Drawing is defined as the pre-eminent methodology for generation of the building; drawings are considered the necessary initial step towards the creation of the 1:1 scale object. During the designing phase, the drawings are primary, setting out an intention. Drawings, therefore, are regarded as having a prescriptive endpoint rather than being part of an open-ended improvisation. Drawings, in getting to a building, draw out something, the act of drawing searches for and uncovers the latent design, drawing it into existence. They are seen as getting to the core of the design. Drawings display a technique of making and are influenced by their medium. Models, in getting to a building, may be described in the same way. The act of modelling, of making manifest two-dimensional sketches into a three-dimensional object, operates similarly in possessing a certain power in assisting the design process to unfurl. Drawing, as recording, alters the object. This act of drawing is used to resolve, and to edit, by excluding and omitting, as much as by including, within its page. Models similarly made after-the-fact are interpretive and consciously aware of their intentions. In encapsulating the subject-object, the model as documentation is equally drawing out meaning. This type of documentation is not neutral, but rather involves interpretation and reflection through representational editing. Working drawings record the house at an ideal moment in time: at the moment the builders leave the site and the owners unlock the front door. These drawings capture the house in stasis. There is often the notion that until the owners of a new house move in, the house has been empty, unlived in. But the life of the house cannot be fixed to any one starting point; rather it has different phases of life from conception to ruin. With working drawings being the dominant representation of the house, they exclude much; both the life of the house before this act of inhabitation, and the life that occurs after it. The transformations that occur at each phase of construction are never shown in a set of working drawings. When a house is built, it separates itself from the space it resides within: the domain of the house is marked off from the rest of the site. The house has a skin of a periphery, that inherently creates an outside and an inside (Kreiser 88). As construction continues, there is a freedom in the structure which closes down; potential becomes prescriptive as choices are made and embodied in material. The undesignedness of the site, that exists before the house is planned, becomes lost once the surveyors’ pegs are in place (Wakely 92). Next, the skeletal frame of open volumes becomes roofed, and then becomes walled, and walking through the frame becomes walking through doorways. One day an interior is created. The interior and exterior of the house are now two different things, and the house has definite edges (Casey 290). At some point, the house becomes lockable, its security assured through this act of sealing. It is this moment that working drawings capture. Photographs comprise the usual documentation of houses once they are built, and yet they show no lived-in-ness, no palimpsest of occupancy. They do not observe the changes and traces the inhabitants make upon a space, nor do they document the path of the person, the arc of their actions, within the space of the house. American architects and artists Elizabeth Diller and Ricardo Scofidio have written of these traces of the everyday that punctuate floor and wall surfaces: the intersecting rings left by coffee glasses on a tabletop, the dust under a bed that becomes its plan analog when the bed is moved, the swing etched into the floor by a sagging door. (Diller & Scofidio 99) It is these marks, these traces, that are omitted from the conventional documentation of a built house. To examine an alternative way of documenting, and to redress these omissions, a redefinition of the house is needed. A space can be delineated by its form, its edges, or it can be defined by the actions that are performed, and the connections between people that occur, within it. To define the house by what it encapsulates, rather than being seen as an object in space, allows a different type of documentation to be employed. By defining a space as that which accommodates actions, rooms may be delineated by the reach of a person, carved out by the actions of a person, as though they are leaving a trace as they move, a windscreen wiper of living, through the repetition of an act. Reverse directional documentation does not directly show the actions that take place within a house; we must infer these from the rooms’ fittings and fixtures, and the names on the plan. In a similar way, Italo Calvino, in Invisible Cities, defines a city by the relationships between its inhabitants, rather than by its buildings: in Ersilia, to establish the relationships that sustain the city’s life, the inhabitants stretch strings from the corners of the houses, white or black or grey or black-and-white according to whether they mark a relationship of blood, of trade, authority, agency. When the strings become so numerous that you can no longer pass among them, the inhabitants leave: the houses are dismantled; only the strings and their supports remain … Thus, when travelling in the territory of Ersilia, you come upon the ruins of the abandoned cities without the walls which do not last, without the bones of the dead which the wind rolls away: spiderwebs of intricate relationships seeking a form. (Calvino 62) By defining architecture by that which it encapsulates, form or materiality may be given to the ‘spiderwebs of intricate relationships’. Modelling the actions that are performed in the space of architecture, therefore, models the architecture. This is referred to as a model of an action. In examining the model of an action, the possibilities of post factum documentation of the house may be seen. The Shinkenchiku competition The Plan-Less House (2006), explored these ideas of representing a house without using the conventional plan to do so. A suggested alternative was to map the use of the house by its inhabitants, similar to the idea of the model of an action. The house could be described by a technique of scanning: those areas that came into contact with the body would be mapped. Therefore, the representation of the house is not connected with spatial division, that is, by marking the location of walls, but rather with its use by its inhabitants. The work of Diller and Scofidio and Allan Wexler and others explores this realm. One inquiry they share is the modelling of the body in the space of architecture: to them, the body is inseparable from the conception of space. By looking at their work, and that of others, three different ways of representing this inhabitation of space are seen. These are: to represent the objects involved in a particular action, or patterns of movement, that occurs in the space, in a way that highlights the action; to document the action itself; or to document the result of the action. These can all be defined as the model of an action. The first way, the examination of the body in a space via an action’s objects, is explored by American artist Allan Wexler, who defines architecture as ‘choreography without a choreographer, structuring its inhabitant’s movements’ (Galfetti 22). In his project ‘Crate House’ (1981), Wexler examines the notion of the body in a space via an action’s objects. He divided the house into its basic activities: bedroom, bathroom, kitchen and living room. Each of these is then defined by their artefacts, contained in their own crate on wheels, which is rolled out when needed. At any point in time, the entire house becomes the activity due to its crate: when a room such as the kitchen is needed, that crate is rolled in through one of the door openings. When the occupant is tired, the entire house becomes a bedroom, and when the occupant is hungry, it becomes a kitchen … I view each crate as if it is a diorama in a natural history museum — the pillow, the spoon, the flashlight, the pot, the nail, the salt. We lose sight of everyday things. These things I isolate, making them sculpture: their use being theatre. (Galfetti 42–6) The work of Andrea Zittel explores similar ideas. ‘A–Z Comfort Unit’ (1994), is made up of five segments, the centrepiece being a couch/bed, which is surrounded by four ancillary units on castors. These offer a library, kitchen, home office and vanity unit. The structure allows the lodger never to need to leave the cocoon-like bed, as all desires are an arm’s reach away. The ritual of eating a meal is examined in Wexler’s ‘Scaffold Furniture’ (1988). This project isolates the components of the dining table without the structure of the table. Instead, the chair, plate, cup, glass, napkin, knife, fork, spoon and lamp are suspended by scaffolding. Their connection, rather than being that of objects sharing a tabletop, is seen to be the (absent) hand that uses them during a meal; the act of eating is highlighted. In these examples, the actions performed within a space are represented by the objects involved in the action. A second way of representing the patterns of movement within a space is to represent the action itself. The Japanese tea ceremony breaks the act of drinking into many parts, separating and dissecting the whole as a way of then reassembling it as though it is one continuous action. Wexler likens this to an Eadweard Muybridge film of a human in motion (Galfetti 31). This one action is then housed in a particular building, so that when devoid of people, the action itself still has a presence. Another way of documenting the inhabitation of architecture, by drawing the actions within the space, is time and motion studies, such as those of Rene W.P. Leanhardt (Diller & Scofidio 40–1). In one series of photographs, lights were attached to a housewife’s wrists, to demonstrate the difference in time and effort required in the preparation of a dinner prepared entirely from scratch in ninety minutes, and a pre-cooked, pre-packaged dinner of the same dish, which took only twelve minutes. These studies are lines of light, recorded as line drawings on a photograph of the kitchen. They record the movement of the person in the room of the action they perform, but they also draw the kitchen in a way conventional documentation does not. A recent example of the documentation of an action was undertaken by Asymptote and the students at Columbia University Graduate School of Architecture in their exhibition at the Venice Biennale of Architecture in 2000. A gymnast moving through the interior space of the pavilion was recorded using a process of digitisation and augmentation. Using modelling procedures, the spatial information was then reconstructed to become a full-scale architectural re-enactment of the gymnast’s trajectory through the room (Feireiss 40). This is similar to a recent performance by Australian contemporary dance company Chunky Move, called ‘Glow’. Infra-red video tracking took a picture of the dancer twenty-five times a second. This was used to generate shapes and images based on the movements of a solo dancer, which were projected onto the floor and the dancer herself. In the past, when the company has used DVDs or videos, the dancer has had to match what they were doing to the projection. This shifts the technology to following the dancer (Bibby 3). A third way of representing the inhabitation of architecture is to document the result of an action. Raoul Bunschoten writes of the marks of a knife being the manifestation of the act of cutting, as an analogy: incisions imply the use of a cutting tool. Together, cuts and cutting tool embrace a special condition. The actual movement of the incision is fleeting, the cut or mark stays behind, the knife moves on, creating an apparent discontinuity … The space of the cut is a reminder of the knife, its shape and its movements: the preparation, the swoop through the air, the cutting, withdrawal, the moving away. These movements remain implicitly connected with the cut as its imaginary cause, as a mnemonic programme about a hand holding a knife, incising a surface, severing skin. (Bunschoten 40) As a method of documenting actions, the paintings of Jackson Pollack can be seen as a manifestation of an act. In the late 1940s, Pollack began to drip paint onto a canvas laid flat on the floor; his tools were sticks and old caked brushes. This process clarified his work, allowing him to walk around it and work from all four sides. Robert Hughes describes it as ‘painting “from the hip” … swinging paintstick in flourishes and frisks that required an almost dancelike movement of the body’ (Hughes 154). These paintings made manifest Pollack’s gestures. As his arm swung in space, the dripping paint followed that arc, to be preserved on a flat plane as pictorial space (Hughes 262). Wexler, in another study, recorded the manifestation of an action. He placed a chair in a one-room building. It was attached to lengths of timber that extended outdoors through slots in the walls of the building. As the chair moved inside the building, its projections carved grooves in the ground outside. As the chair moved in a particular pattern, deeper grooves were created: ‘Eventually, the occupant of the chair has no choice in his movement; the architecture moves him.’ (Galfetti 14) The pattern of movement creates a result, which in turn influences the movement. By redefining architecture by what it encapsulates rather than by the enclosure itself, allows architecture to be documented by the post factum model of an action that occurs in that space. This leads to the exploration of architecture, formed by the body within it, since the documentation and representation of architecture starts to affect the reading of architecture. Architecture may then be seen as that which encloses the inhabitant. The documentation of the body and the space it makes concerns the work of the Hungarian architect Imre Makovecz. His exploration is of the body and the space it makes. Makovecz, and a circle of like-minded architects and artists, embarked on a series of experiments analysing the patterns of human motion and subsequently set up a competition based around the search for a minimum existential space. This consisted of mapping human motion in certain spatial conditions and situations. Small light bulbs were attached to points on the limbs and joints and photographed, creating a series of curves and forms. This led to a competition called ‘Minimal Space’ (1971–2), in which architects, artists and designers were invited to consider a minimal space for containing the human body, a new notion of personal containment. Makovecz’s own response took the form of a bell-like capsule composed of a double shell expressing its presence and location in both time and space (Heathcote 120). Vito Acconci, an artist turned architect by virtue of his installation work, explored this notion of enclosure in his work (Feireiss 38). In 1980 Acconci began his series of ‘self-erecting architectures’, vehicles or instruments involving one or more viewers whose operation erected simple buildings (Acconci & Linker 114). In his project ‘Instant House’ (1980), a set of walls lies flat on the floor, forming an open cruciform shape. By sitting in the swing in the centre of this configuration, the visitor activates an apparatus of cables and pulleys causing walls to rise and form a box-like house. It is a work that explores the idea of enclosing, of a space being something that has to be constructed, in the same way for example one builds up meaning (Reed 247–8). This documentation of architecture directly references the inhabitation of architecture. The post factum model of architecture is closely linked to the body in space and the actions it performs. Examining the actions and movement patterns within a space allows the inhabitation process to be seen as a dynamic process. David Owen describes the biological process of ‘ecopoiesis’: the process of a system making a home for itself. He describes the building and its occupants jointly as the new system, in a system of shaping and reshaping themselves until there is a tolerable fit (Brand 164). The definition of architecture as being that which encloses us, interests Edward S. Casey: in standing in my home, I stand here and yet feel surrounded (sheltered, challenged, drawn out, etc.) by the building’s boundaries over there. A person in this situation is not simply in time or simply in space but experiences an event in all its engaging and unpredictable power. In Derrida’s words, ‘this outside engages us in the very thing we are’, and we find ourselves subjected to architecture rather than being the controlling subject that plans or owns, uses or enjoys it; in short architecture ‘comprehends us’. (Casey 314) This shift in relationship between the inhabitant and architecture shifts the documentation and reading of the exhibition of architecture. Casey’s notion of architecture comprehending the inhabitant opens the possibility for an alternate exhibition of architecture, the documentation of that which is beyond the inhabitant’s direction. Conventional documentation shows a quiescence to the house. Rather than attempting to capture the flurry — the palimpsest of occupancy — within the house, it is presented as stilled, inert and dormant. In representing the house this way, a lull is provided, fostering a steadiness of gaze: a pause is created, within which to examine the house. However, the house is then seen as object, rather than that which encapsulates motion and temporality. Defining, and thus documenting, the space of architecture by its actions, extends the perimeter of architecture. No longer is the house bounded by its doors and walls, but rather by the extent of its patterns of movement. Post factum documentation allows this altering of the definition of architecture, as it includes the notion of the model of an action. By appropriating, clarifying and reshaping situations that are relevant to the investigation of post factum documentation, the notion of the inhabitation of the house as a definition of architecture may be examined. This further examines the relationship between architectural representation, the architectural image, and the image of architecture. References Acconci, V., and K. Linker. Vito Acconci. New York: Rizzoli, 1994. Bibby, P. “Dancer in the Dark Is Light Years Ahead.” Sydney Morning Herald 22 March 2007: 3. Brand, S. How Buildings Learn: What Happens after They’re Built. London: Phoenix Illustrated, 1997. Bunschoten, R. “Cutting the Horizon: Two Theses on Architecture.” Forum (Nov. 1992): 40–9. Calvino, I. Invisible Cities. London: Picador, 1979. Casey, E.S. The Fate of Place. California: U of California P, 1998. Diller, E., and R. Scofidio. Flesh: Architectural Probes. New York: Princeton Architectural Press, 1994. Evans, R. Translations from Drawing to Building and Other Essays. Cambridge, Mass.: MIT Press, 1997. ———. “Architectural Projection.” Eds. E. Blau and E. Kaufman. Architecture and Its Image: Four Centuries of Architectural Representation: Works from the Collection of the Canadian Center for Architecture. Exhibition catalogue. Cambridge, Mass.: MIT Press, 1989. 19–35. Feireiss, K., ed. The Art of Architecture Exhibitions. Rotterdam: Netherlands Architecture Institute, 2001. Galfetti, G.G., ed. Allan Wexler. Barcelona: GG Portfolio, 1998. Glanville, R. “An Irregular Dodekahedron and a Lemon Yellow Citroen.” In L. van Schaik, ed., The Practice of Practice: Research in the Medium of Design. Melbourne: RMIT University Press, 2003. 258–265. Heathcote, E. Imre Mackovecz: The Wings of the Soul. West Sussex: Academy Editions, 1997. Hughes, R. The Shock of the New: Art and the Century of Change. London: British Broadcasting Corporation, 1980. Kreiser, C. “On the Loss of (Dark) Inside Space.” Daidalos 36 (June 1990): 88–99. Reed, C. ed. Not at Home: The Suppression of Domesticity in Modern Art and Architecture. London: Thames & Hudson, 1996. “Shinkenchiku Competition 2006: The Plan-Less House.” The Japan Architect 64 (Winter 2007): 7–12. Small, D. Paper John. USA: Farrar, Straus and Giroux, 1987. Wakely, M. Dream Home. Crows Nest, NSW: Allen & Unwin. 2003. Citation reference for this article MLA Style Macken, Marian. "And Then We Moved In: Post Factum Documentation of the House." M/C Journal 10.4 (2007). echo date('d M. Y'); ?> <http://journal.media-culture.org.au/0708/04-macken.php>. APA Style Macken, M. (Aug. 2007) "And Then We Moved In: Post Factum Documentation of the House," M/C Journal, 10(4). Retrieved echo date('d M. Y'); ?> from <http://journal.media-culture.org.au/0708/04-macken.php>.

In a recent gaming anthology, Henry Jenkins cannot help contrasting his son's cramped, urban, media-saturated existence with his own idyllic, semi-rural childhood. After describing his own Huck Finn meanderings over "the spaces of my boyhood" including the imaginary kingdoms of Jungleoca and Freedonia, Jenkins relates his version of his son's experiences: My son, Henry, now 16 has never had a backyard He has grown up in various apartment complexes, surrounded by asphalt parking lots with, perhaps, a small grass buffer from the street… Once or twice, when I became exasperated by my son's constant presence around the house I would … tell him he should go out and play. He would look at me with confusion and ask, where? … Who wouldn't want to trade in the confinement of your room for the immersion promised by today's video games? … Perhaps my son finds in his video games what I found in the woods behind the school, on my bike whizzing down the hills of suburban backstreets, or settled into my treehouse with a good adventure novel intensity of experience, escape from adult regulation; in short, "complete freedom of movement". (Jenkins 1998, 263-265) Games here are connected with a shrinking availability of domestic and public space, and a highly mediated experience of the world. Despite his best intentions, creeping into Jenkins's piece is a sense that games act as a poor substitute for the natural spaces of a "healthy" childhood. Although "Video games did not make backyard play spaces disappear", they "offer children some way to respond to domestic confinement" (Jenkins 1998, 266). They emerge, then, as a palliation for the claustrophobic circumstances of contemporary urban life, though they offer only unreal spaces, replete with "lakes of fire … cities in the clouds … [and] dazzling neon-lit Asian marketplaces" (Jenkins 1998, 263), where the work of the childish imagination is already done. Despite Jenkins's assertion that games do offer "complete freedom of movement", it is hard to shake the feeling that he considers his own childhood far richer in exploratory and imaginative opportunities: Let me be clear I am not arguing that video games are as good for kids as the physical spaces of backyard play culture. As a father, I wish that my son would come home covered in mud or with scraped knees rather than carpet burns ... The psychological and social functions of playing outside are as significant as the impact of "sunshine and good exercise" upon our physical well-being. (Jenkins 1998, 266) Throughout the piece, games are framed by a romantic, anti-urban discourse: the expanding city is imagined as engulfing space and perhaps destroying childhood itself, such that "'sacred' places are now occupied by concrete, bricks or asphalt" (Jenkins 1998, 263). Games are complicit in this alienation of space and experience. If this is not quite Paul Virilio's recent dour contention that modern mass media forms work mainly to immobilise the body of the consumer--Virilio, luckily, has managed to escape the body-snatchers--games here are produced as a feeble response to an already-effected urban imprisonment of the young. Strikingly, Jenkins seems concerned about his son's "unhealthy" confinement to private, domestic space, and his inability to imaginatively possess a slice of the world outside. Jenkins's description of his son's confinement to the world of "carpet burns" rather than the great outdoors of "scraped knees" and "mud" implicitly leaves the distinction between domestic and public, internal and external, and even the imagined passivity of the domestic sphere as against the activity of the public intact. For those of us who see games as productive activities, which generate particular, unique kinds of pleasure in their own right, rather than as anaemic replacements for lost spaces, this seems to reduce a central cultural form. For those of us who have at least some sympathy with writers on the urban environment like Raban (1974) and Young (1990), who see the city's theatrical and erotic possibilities, Jenkins's fears might seem to erase the pleasures and opportunities that city life provides. Rather than seeing gamers and children (the two groups only partially overlap) as unwitting agents in their own confinement, we can arrive at a slightly more complex view of the relationship between games and urban space. By looking at the video games arcade as it is situated in urban retail space, we can see how gameplay simultaneously acts to regulate urban space, mediates a unique kind of urban performance, and allows sophisticated representations, manipulations and appropriations of differently conceived urban spaces. Despite being a long-standing feature of the urban and retail environment, and despite also being a key site for the "exhibition" of a by-now central media form, the video game arcade has a surprisingly small literature devoted to it. Its prehistory in pinball arcades and pachinko parlours has been noted (by, for example, Steven Poole 2000) but seldom deeply explored, and its relations with a wider urban space have been given no real attention at all. The arcade's complexity, both in terms of its positioning and functions, may contribute to this. The arcade is a space of conflicting, contradictory uses and tendencies, though this is precisely what makes it as important a space as the cinema or penny theatre before it. Let me explain why I think so. The arcade is always simultaneously a part of and apart from the retail centres to which it tends to attach itself.1 If it is part of a suburban shopping mall, it is often located on the ground floor near the entrance, or is semi-detached as cinema complexes often are, so that the player has to leave the mall's main building to get there, or never enter. If it is part of a city or high street shopping area, it is often in a side street or a street parallel to the main retail thoroughfare, or requires the player to mount a set of stairs into an off-street arcade. At other times the arcade is located in a space more strongly marked as liminal in relation to the city -- the seaside resort, sideshow alley or within the fences of a theme park. Despite this, the videogame arcade's interior is usually wholly or mostly visible from the street, arcade or thoroughfare that it faces, whether this visibility is effected by means of glass walls, a front window or a fully retractable sliding door. This slight distance from the mainstream of retail activity and the visibility of the arcade's interior are in part related to the economics of the arcade industry. Arcade machines involve relatively low margins -- witness the industry's recent feting and embrace of redemption (i.e. low-level gambling) games that offer slightly higher turnovers -- and are hungry for space. At the same time, arcades are dependent on street traffic, relentless technological novelty and their de facto use as gathering space to keep the coins rolling in. A balance must be found between affordability, access and visibility, hence their positioning at a slight remove from areas of high retail traffic. The story becomes more complicated, though, when we remember that arcades are heavily marked as deviant, disreputable spaces, whether in the media, government reports or in sociological and psychological literature. As a visible, public, urban space where young people are seen to mix with one another and unfamiliar and novel technologies, the arcade is bound to give rise to adult anxieties. As John Springhall (1998) puts it: More recent youth leisure… occupies visible public space, is seen as hedonistic and presents problems within the dominant discourse of 'enlightenment' … [T]he most popular forms of entertainment among the young at any given historical moment tend also to provide the focus of the most intense social concern. A new medium with mass appeal, and with a technology best understood by the young… almost invariably attracts a desire for adult or government control (160-161, emphasis mine) Where discourses of deviant youth have also been employed in extending the surveillance and policing of retail space, it is unsurprising that spaces seen as points for the concentration of such deviance will be forced away from the main retail thoroughfares, in the process effecting a particular kind of confinement, and opportunity for surveillance. Michel Foucault writes, in Discipline and Punish, about the classical age's refinements of methods for distributing and articulating bodies, and the replacement of spectacular punishment with the crafting of "docile bodies". Though historical circumstances have changed, we can see arcades as disciplinary spaces that reflect aspects of those that Foucault describes. The efficiency of arcade games in distributing bodies in rows, and side by side demonstrates that" even if the compartments it assigns become purely ideal, the disciplinary space is always, basically, cellular" (Foucault 1977, 143). The efficiency of games from Pong (Atari:1972) to Percussion Freaks (Konami: 1999) in articulating bodies in play, in demanding specific and often spectacular bodily movements and competencies means that "over the whole surface of contact between the body and the object it handles, power is introduced, fastening them to one another. It constitutes a body weapon, body-tool, body-machine complex" (Foucault 1977,153). What is extraordinary is the extent to which the articulation of bodies proceeds only through a direct engagement with the game. Pong's instructions famously read only "avoid missing ball for high score"--a whole economy of movement, arising from this effort, is condensed into six words. The distribution and articulation of bodies also entails a confinement in the space of the arcade, away from the main areas of retail trade, and renders occupants easily observable from the exterior. We can see that games keep kids off the streets. On the other hand, the same games mediate spectacular forms of urban performance and allow particular kinds of reoccupation of urban space. Games descended or spun off from Dance Dance Revolution (Konami: 1998) require players to dance, in time with thumping (if occasionally cheesy) techno, and in accordance with on-screen instructions, in more and more complex sequences on lit footpads. These games occupy a lot of space, and the newest instalment (DDR has just issued its "7th Mix") is often installed at the front of street level arcades. When played with flair, games such as these are apt to attract a crowd of onlookers to gather, not only inside, but also on the footpath outside. Indeed games such as these have given rise to websites like http://www.dancegames.com/au which tells fans not only when and where new games are arriving, but whether or not the positioning of arcades and games within them will enable a player to attract attention to their performance. This mediation of cyborg performance and display -- where success both achieves and exceeds perfect integration with a machine in urban space -- is particularly important to Asian-Australian youth subcultures, which are often marginalised in other forums for youthful display, like competitive sport. International dance gamer websites like Jason Ho's http://www.ddrstyle.com , which is emblazoned with the slogan "Asian Pride", explicitly make the connection between Asian youth subcultures and these new kinds of public performance. Games like those in the Time Crisis series, which may seem less innocuous, might be seen as effecting important inversions in the representation of urban space. Initially Time Crisis, which puts a gun in the player's hand and requires them to shoot at human figures on screen, might even be seen to live up to the dire claims made by figures like Dave Grossman that such games effectively train perpetrators of public violence (Grossman 1995). What we need to keep in mind, though, is that first, as "cops", players are asked to restore order to a representation of urban space, and second, that that they are reacting to images of criminality. When criminality and youth are so often closely linked in public discourse (not to mention criminality and Asian ethnicity) these games stage a reversal whereby the young player is responsible for performing a reordering of the unruly city. In a context where the ideology of privacy has progressively marked public space as risky and threatening,2 games like Time Crisis allow, within urban space, a performance aimed at the resolution of risk and danger in a representation of the urban which nevertheless involves and incorporates the material spaces that it is embedded in.This is a different kind of performance to DDR, involving different kinds of image and bodily attitude, that nevertheless articulates itself on the space of the arcade, a space which suddenly looks more complex and productive. The manifest complexity of the arcade as a site in relation to the urban environment -- both regulating space and allowing spectacular and sophisticated types of public performance -- means that we need to discard simplistic stories about games providing surrogate spaces. We reify game imagery wherever we see it as a space apart from the material spaces and bodies with which gaming is always involved. We also need to adopt a more complex attitude to urban space and its possibilities than any narrative of loss can encompass. The abandonment of such narratives will contribute to a position where we can recognise the difference between the older and younger Henrys' activities, and still see them as having a similar complexity and richness. With work and luck, we might also arrive at a material organisation of society where such differing spaces of play -- seen now by some as mutually exclusive -- are more easily available as choices for everyone. NOTES 1 Given the almost total absence of any spatial study of arcades, my observations here are based on my own experience of arcades in the urban environment. Many of my comments are derived from Brisbane, regional Queensland and urban-Australian arcades this is where I live but I have observed the same tendencies in many other urban environments. Even where the range of services and technologies in the arcades are different in Madrid and Lisbon they serve espresso and alcohol (!), in Saigon they often consist of a bank of TVs equipped with pirated PlayStation games which are hired by the hour their location (slightly to one side of major retail areas) and their openness to the street are maintained. 2 See Spigel, Lynn (2001) for an account of the effects and transformations of the ideology of privacy in relation to media forms. See Furedi, Frank (1997) and Douglas, Mary (1992) for accounts of the contemporary discourse of risk and its effects. References Douglas, M. (1992) Risk and Blame: Essays in Cultural Theory. London ; New York : Routledge. Foucault, M. (1979) Discipline and Punish: The Birth of the Prison. Trans. Alan Sheridan. Harmondsworth, England: Penguin,. Furedi, F.(1997) Culture of Fear: Risk-taking and the Morality of Low Expectation. London ; Washington : Cassell. Grossman, D. (1995) On Killing: The Psychological Cost of Learning to Kill in War and Society. Boston: Little, Brown. Jenkins, H. (1998) Complete freedom of movement: video games as gendered play spaces. In Jenkins, Henry and Justine Cassell (eds) From Barbie to Mortal Kombat : Gender and Computer Games. Cambridge, Mass.: MIT Press. Poole, S. (2000) Trigger Happy: The Inner Life of Videogames. London: Fourth Estate. Raban, J. (1974) Soft City. London: Hamilton. Spigel, L. (2001) Welcome to the Dreamhouse: Popular Media and the Postwar Suburbs. Durham and London: Duke University Press. Springhall, J. (1998) Youth, Popular Culture and Moral Panics : Penny Gaffs to Gangsta-rap, 1830-1996. New York: St. Martin's Press. Young, I.M. (1990) Justice and the Politics of Difference. Princeton, NJ: Princeton University Press. Websites http://www.yesterdayland.com/popopedia/s... (Time Crisis synopsis and shots) http://www.dancegames.com/au (Site for a network of fans revealing something about the culture around dancing games) http://www.ddrstyle.com (website of Jason Ho, who connects his dance game performances with pride in his Asian identity). http://www.pong-story.com (The story of Pong, the very first arcade game) Games Dance Dance Revolution, Konami: 1998. Percussion Freaks, Konami: 1999. Pong, Atari: 1972. Time Crisis, Namco: 1996. Links http://www.dancegames.com/au http://www.yesterdayland.com/popopedia/shows/arcade/ag1154.php http://www.pong-story.com http://www.ddrstyle.com Citation reference for this article MLA Style Wilson, Jason A.. "Performance, anxiety" M/C: A Journal of Media and Culture 5.2 (2002). [your date of access] < http://www.media-culture.org.au/0205/performance.php>. Chicago Style Wilson, Jason A., "Performance, anxiety" M/C: A Journal of Media and Culture 5, no. 2 (2002), < http://www.media-culture.org.au/0205/performance.php> ([your date of access]). APA Style Wilson, Jason A.. (2002) Performance, anxiety. M/C: A Journal of Media and Culture 5(2). < http://www.media-culture.org.au/0205/performance.php> ([your date of access]).

If the home is traditionally considered to be a space of safety associated with the warm and cosy feeling of the familial hearth, it is also continuously portrayed as a space under threat from the outside from which we must secure ourselves and our families. Securing the home entails a series of material, discursive and performative strategies, a host of precautionary measures aimed at regulating and ultimately producing security. When I was eleven my family returned home from the local fruit markets to find our house had been ransacked. Clothes were strewn across the floor, electrical appliances were missing and my parents’ collection of jewellery – wedding rings and heirlooms – had been stolen. Few things remained untouched and the very thought of someone else’s hands going through our personal belongings made our home feel tainted. My parents were understandably distraught. As Filipino immigrants to Australia the heirlooms were not only expensive assets from both sides of my family, but also signifiers of our homeland. Added to their despair was the fact that this was our first house – we had rented prior to that. During the police interviews, we discovered that our area, Sydney’s Western suburbs, was considered ‘high-risk’ and we were advised to install security. In their panic my parents began securing their home. Grills were installed on every window. Each external wooden door was reinforced by a metal security door. Movement detectors were installed at the front of the house, which were set to blind intruders with floodlights. Even if an intruder could enter the back through a window a metal grill security door was waiting between the backroom and the kitchen to stop them from getting to our bedrooms. In short, through a series of transformations our house was made into a residential fortress. Yet home security had its own dangers. A series of rules and regulations were drilled into me ‘in case of an emergency’: know where your keys are in case of a fire so that you can get out; remember the phone numbers for an emergency and the work numbers of your parents; never let a stranger into the house; and if you need to speak to a stranger only open the inside door but leave the security screen locked. Thus, for my Filipino-migrant family in the 1990s, a whole series of defensive behaviours and preventative strategies were produced and disseminated inside and around the home to regulate security risks. Such “local knowledges” were used to reinforce the architectural manifestations of security at the same time that they were a response to the invasion of security systems into our house that created a new set of potential dangers. This article highlights “the interplay of material and symbolic geographies of home” (Blunt and Varley 4), focusing on the relation between urban fears circulating around and within the home and the spatial practices used to negotiate such fears. In exploring home security systems it extends the exemplary analysis of home technologies already begun in Lynn Spigel’s reading of the ‘smart home’ (381-408). In a similar vein, David Morley’s analysis of mediated domesticity shows how communications technology has reconfigured the inside and outside to the extent that television actually challenges the physical boundary that “protects the privacy and solidarity of the home from the flux and threat of the outside world” (87). Television here serves as a passage in which the threat of the outside is reframed as news or entertainment for family viewing. I take this as a point of departure to consider the ways that this mediated fear unfolds in the technology of our homes. Following Brian Massumi, I read the home as “a node in a circulatory network of many dimensions (each corresponding to a technology of transmission)” (85). For Massumi, the home is an event-space at the crossroads of media technologies and political technologies. “In spite of the locks on the door, the event-space of the home must be seen as one characterized by a very loose regime of passage” (85). The ‘locked door’ is not only a boundary marker that defines the inside from the outside but another technology that leads us outside the home into other domains of inquiry: the proliferation of security technologies and the mundane, fearful intimacies of the home. In this context, we should heed Iris Marion Young’s injunction to feminist critics that the home does provide some positives including a sense of privacy and the space to build relationships and identities. Yet, as Colomina argues, the traditional domestic ideal “can only be produced by engaging the home in combat” (20). If, as Colomina’s comment suggests, ontological security is at least partially dependent on physical security, then this article explores the ontological effects of our home security systems. Houses at War: Targeting the Family As Beatriz Colomina reminds us, in times of war we leave our homelands to do battle on the front line, but battle lines are also being drawn in our homes. Drawing inspiration from Virilio’s claim that contemporary war takes place without fighting, Colomina’s article ‘Domesticity at War’ contemplates the domestic interior as a “battlefield” (15). The house, she writes, is “a mechanism within a war where the differences between defense [sic] and attack have become blurred” (17). According to the Home Security Precautions, New South Wales, October 1999 report conducted by the Australian Bureau of Statistics, 47% of NSW dwellings were ‘secure’ (meaning that they either had a burglar alarm, or all entry points were secured or they were inside a security block) while only 9% of NSW households had no home security devices present (Smith 3). In a similar report for Western Australia conducted in October 2004, an estimated 71% of WA households had window security of some sort (screens, locks or shutters) while 67% had deadlocks on at least one external door (4). An estimated 27% had a security alarm installed while almost half (49%) had sensor lights (Hubbard 4-5). This growing sense of insecurity means big business for those selling security products and services. By the end of June 1999, there were 1,714 businesses in Australia’s security services industry generating $1,395 million of income during 1998-99 financial year (McLennan 3; see also Macken). This survey did not include locksmith services or the companies dealing with alarm manufacturing, wholesaling or installing. While Colomina’s article focuses on the “war with weather” and the attempts to control environmental conditions inside the home through what she calls “counterdomesticity” (20), her conceptualisation of the house as a “military weapon” (17) provides a useful tool for thinking the relation between the home, architecture and security. Conceiving of the house as a military weapon might seem like a stretch, but we should recall that the rhetoric of war has already leaked into the everyday. One hears of the ‘war on drugs’ and the ‘war on crime’ in the media. ‘War’ is the everyday condition of our urban jungles (see also Diken and Lausten) and in order to survive, let alone feel secure, one must be able to defend one’s family and home. Take, for example, Signal Security’s website. One finds a panel on the left-hand side of the screen to all webpages devoted to “Residential Products”. Two circular images are used in the panel with one photograph overlapping the other. In the top circle, a white nuclear family (stereotypical mum, dad and two kids), dressed in pristine white clothing bare their white teeth to the internet surfer. Underneath this photo is another photograph in which an arm clad in a black leather jacket emerges through a smashed window. In the foreground a black-gloved hand manipulates a lock, while a black balaclava masks an unrecognisable face through the broken glass. The effect of their proximity produces a violent juxtaposition in which the burglar visually intrudes on the family’s domestic bliss. The panel stages a struggle between white and black, good and bad, family and individual, security and insecurity, recognisability and unidentifiability. It thus codifies the loving, knowable family as the domestic space of security against the selfish, unidentifiable intruder (presumed not to have a family) as the primary reason for insecurity in the family home – and no doubt to inspire the consumption of security products. Advertisements of security products thus articulate the family home as a fragile innocence constantly vulnerable from the outside. From a feminist perspective, this image of the family goes against the findings of the National Homicide Monitoring Program, which shows that 57% of the women killed in Australia between 2004 and 2005 were killed by an intimate partner while 17% were killed by a family member (Mouzos and Houliaras 20). If, on the one hand, the family home is targeted by criminals, on the other, it has emerged as a primary site for security advertising eager to exploit the growing sense of insecurity – the family as a target market. The military concepts of ‘target’ and ‘targeting’ have shifted into the benign discourse of strategic advertising. As Dora Epstein writes, “We arm our buildings to arm ourselves from the intrusion of a public fluidity, and thus our buildings, our architectures of fortification, send a very clear message: ‘avoid this place or protect yourself’” (1997: 139). Epstein’s reference to ‘architectures of fortification’ reminds us that the desire to create security through the built environment has a long history. Nan Ellin has argued that fear’s physical manifestation can be found in the formation of towns from antiquity to the Renaissance. In this sense, towns and cities are always already a response to the fear of foreign invaders (Ellin 13; see also Diken and Lausten 291). This fear of the outsider is most obviously manifested in the creation of physical walls. Yet fortification is also an effect of spatial allusions produced by the configuration of space, as exemplified in Fiske, Hodge and Turner’s semiotic reading of a suburban Australian display home without a fence. While the lack of a fence might suggest openness, they suggest that the manicured lawn is flat so “that eyes can pass easily over it – and smooth – so that feet will not presume to” (30). Since the front garden is best viewed from the street it is clearly a message for the outside, but it also signifies “private property” (30). Space is both organised and lived, in such a way that it becomes a medium of communication to passers-by and would-be intruders. What emerges in this semiotic reading is a way of thinking about space as defensible, as organised in a way that space can begin to defend itself. The Problematic of Defensible Space The incorporation of military architecture into civil architecture is most evident in home security. By security I mean the material systems (from locks to electronic alarms) and precautionary practices (locking the door) used to protect spaces, both of which are enabled by a way of imagining space in terms of risk and vulnerability. I read Oscar Newman’s 1972 Defensible Space as outlining the problematic of spatial security. Indeed, it was around that period that the problematic of crime prevention through urban design received increasing attention in Western architectural discourse (see Jeffery). Newman’s book examines how spaces can be used to reinforce human control over residential environments, producing what he calls ‘defensible space.’ In Newman’s definition, defensible space is a model for residential environments which inhibits crime by creating the physical expression of a social fabric that defends itself. All the different elements which combine to make a defensible space have a common goal – an environment in which latent territoriality and sense of community in the inhabitants can be translated into responsibility for ensuring a safe, productive, and well-maintained living space (3). Through clever design space begins to defend itself. I read Newman’s book as presenting the contemporary problematic of spatialised security: how to structure space so as to increase control; how to organise architecture so as to foster territorialism; how to encourage territorial control through amplifying surveillance. The production of defensible space entails moving away from what he calls the ‘compositional approach’ to architecture, which sees buildings as separate from their environments, and the ‘organic approach’ to architecture, in which the building and its grounds are organically interrelated (Newman 60). In this approach Newman proposes a number of changes to space: firstly, spaces need to be multiplied (one no longer has a simple public/private binary, but also semi-private and semi-public spaces); secondly, these spaces must be hierarchised (moving from public to semi-public to semi-private to private); thirdly, within this hierarchy spaces can also be striated using symbolic or material boundaries between the different types of spaces. Furthermore, spaces must be designed to increase surveillance: use smaller corridors serving smaller sets of families (69-71); incorporate amenities in “defined zones of influence” (70); use L-shaped buildings as opposed to rectangles (84); use windows on the sides of buildings to reveal the fire escape from outside (90). As he puts it, the subdivision of housing projects into “small, recognisable and comprehensible-at-a-glance enclaves is a further contributor to improving the visual surveillance mechanism” (1000). Finally, Newman lays out the principle of spatial juxtaposition: consider the building/street interface (positioning of doors and windows to maximise surveillance); consider building/building interface (e.g. build residential apartments next to ‘safer’ commercial, industrial, institutional and entertainment facilities) (109-12). In short, Newman’s book effectively redefines residential space in terms of territorial zones of control. Such zones of influence are the products of the interaction between architectural forms and environment, which are not reducible to the intent of the architect (68). Thus, in attempting to respond to the exigencies of the moment – the problem of urban crime, the cost of housing – Newman maps out residential space in what Foucault might have called a ‘micro-physics of power’. During the mid-1970s through to the 1980s a number of publications aimed at the average householder are printed in the UK and Australia. Apart from trade publishing (Bunting), The UK Design Council released two small publications (Barty, White and Burall; Design Council) while in Australia the Department of Housing and Construction released a home safety publication, which contained a small section on security, and the Australian Institute of Criminology published a small volume entitled Designing out Crime: Crime prevention through environmental design (Geason and Wilson). While Newman emphasised the responsibility of architects and urban planners, in these publications the general concerns of defensible space are relocated in the ‘average homeowner’. Citing crime statistics on burglary and vandalism, these publications incite their readers to take action, turning the homeowner into a citizen-soldier. The householder, whether he likes it or not, is already in a struggle. The urban jungle must be understood in terms of “the principles of warfare” (Bunting 7), in which everyday homes become bodies needing protection through suitable architectural armour. Through a series of maps and drawings and statistics, the average residential home is transformed into a series of points of vulnerability. Home space is re-inscribed as a series of points of entry/access and lines of sight. Simultaneously, through lists of ‘dos and don’ts’ a set of precautionary behaviours is inculcated into the readers. Principles of security begin codifying the home space, disciplining the spatial practices of the intimate, regulating the access and mobility of the family and guests. The Architectural Nervous System Nowadays we see a wild, almost excessive, proliferation of security products available to the ‘security conscious homeowner’. We are no longer simply dealing with security devices designed to block – such as locks, bolts and fasteners. The electronic revolution has aided the production of security devices that are increasingly more specialised and more difficult to manipulate, which paradoxically makes it more difficult for the security consumer to understand. Detection systems now include continuous wiring, knock-out bars, vibration detectors, breaking glass detectors, pressure mats, underground pressure detectors and fibre optic signalling. Audible alarm systems have been upgraded to wire-free intruder alarms, visual alarms, telephone warning devices, access control and closed circuit television and are supported by uninterruptible power supplies and control panels (see Chartered Institution of Building Service Engineers 19-39). The whole house is literally re-routed as a series of relays in an electronic grid. If the house as a security risk is defined in terms of points of vulnerability, alarm systems take these points as potential points of contact. Relays running through floors, doors and windows can be triggered by pressure, sound or dislocation. We see a proliferation of sensors: switching sensors, infra-red sensors, ultrasonic sensors, microwave radar sensors, microwave fence sensors and microphonic sensors (see Walker). The increasing diversification of security products attests to the sheer scale of these architectural/engineering changes to our everyday architecture. In our fear of crime we have produced increasingly more complex security products for the home, thus complexifying the spaces we somehow inherently feel should be ‘simple’. I suggest that whereas previous devices merely reinforced certain architectural or engineering aspects of the home, contemporary security products actually constitute the home as a feeling, architectural body capable of being affected. This recalls notions of a sensuous architecture and bodily metaphors within architectural discourse (see Thomsen; Puglini). It is not simply our fears that lead us to secure our homes through technology, but through our fears we come to invest our housing architecture with a nervous system capable of fearing for itself. Our eyes and ears become detection systems while our screams are echoed in building alarms. Body organs are deterritorialised from the human body and reterritorialised on contemporary residential architecture, while our senses are extended through modern security technologies. The vulnerable body of the family home has become a feeling body conscious of its own vulnerability. It is less about the physical expression of fear, as Nan Ellin has put it, than about how building materialities become capable of fearing for themselves. What we have now are residential houses that are capable of being more fully mobilised in this urban war. Family homes become bodies that scan the darkness for the slightest movements, bodies that scream at the slightest possibility of danger. They are bodies that whisper to each other: a house can recognise an intrusion and relay a warning to a security station, informing security personnel without the occupants of that house knowing. They are the newly produced victims of an urban war. Our homes are the event-spaces in which mediated fear unfolds into an architectural nervous system. If media plug our homes into one set of relations between ideologies, representations and fear, then the architectural nervous system plugs that back into a different set of relations between capital, fear and the electronic grid. The home is less an endpoint of broadcast media than a node in an electronic network, a larger nervous system that encompasses the globe. It is a network that plugs architectural nervous systems into city electronic grids into mediated subjectivities into military technologies and back again, allowing fear to be disseminated and extended, replayed and spliced into the most banal aspects of our domestic lives. 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