Journal articles on the topic 'Time-Aware Shaper (TAS)'

To solve the problem of jitter and low network throughput caused by the impact of background flows on IQ traffic in mobile fronthaul network, this paper proposed a new scheduling model for background flows, named hierarchical crossover traffic scheduling mechanism based on time-aware shaper (HC-TAS) by improving the traditional counterpart. Then, in this new model, we designed an inbound scheduling algorithm based on frame length matching and an outbound scheduling algorithm based on queue status, making sure that smaller data frames will not be blocked by large data frames. This greatly improves the utilization of timeslots in the scheduling process and reduces the jitter impact of background flows. To verify its performance, we conducted experiments in a simulated fronthaul network conforming to IEEE 802.1CM. The experimental results show that, under the condition that the jitter is guaranteed to be zero, compared with two mainstream scheduling schemes, Comb-FITting and TAS + Preemption, our proposed scheme can achieve lower maximum end-to-end delay and higher link utilization. The proposed HC-TAS meets the requirements of low jitter and high bandwidth utilization in 5G fronthaul network, and the research results provide a technical basis for the application and development of general time-sensitive networks as well.

As new networking paradigms emerge for different networking applications, e.g., cyber-physical systems, and different services are handled under a converged data link technology, e.g., Ethernet, certain applications with mission critical traffic cannot coexist on the same physical networking infrastructure using traditional Ethernet packet-switched networking protocols. The IEEE 802.1Q Time Sensitive Networking (TSN) Task Group is developing protocol standards to provide deterministic properties, i.e., eliminates non-deterministic delays, on Ethernet based packet-switched networks. In particular, the IEEE 802.1Qcc, centralized management and control, and the IEEE 802.1Qbv, Time-Aware Shaper (TAS), can be used to manage and control Scheduled Traffic (ST) streams with periodic properties along with Best-Effort (BE) traffic on the same network infrastructure. We investigate the effects of using the IEEE 802.1Qcc management protocol to accurately and precisely configure TAS enabled switches (with transmission windows governed by Gate Control Lists (GCLs) with Gate Control Entries (GCEs)) ensuring ultra-low bounded latency, zero packet loss, and minimal jitter for ST TSN traffic. We examine both a centralized network/distributed user model (hybrid model) and a fully-distributed (decentralized) 802.1Qcc model on a typical industrial control network with the goal of maximizing the number of ST streams.

With the rapid development of Industrial 4.0, massive emerging time-critical applications pose new demands for industrial networks, such as strict latency boundaries, ultra-reliable transmission, and so on. Time-Sensitive Networking (TSN) is well suited for these demanding scenarios due to its support for deterministic transmission based on Ethernet. However, many use cases in real industrial scenarios involve non-TSN domains, and, thus, the network requires providing deterministic transmission across non-TSN domains to support them. To this end, this paper proposes a novel Software-Defined Time-Sensitive Networking (SD-TSN) framework that integrates the determinism of TSN and scalability of Software-Defined Networking (SDN). SD-TSN exploits the coordination between the coordinated controller and different domain controllers to bound non-deterministic queuing delays in a way that guarantees determinism. In particular, we designed a multi-domain time-aware traffic scheduling model, which harmonizes the time-aware shaper (TAS) in TSN and time-slots in non-TSN domains based on a global view, generating transmission schedules for each domain. A prototype testbed was built to conduct the experiments. The evaluation results demonstrate that the proposed method can efficiently achieve bounded delay and low delay variations in the transmission across non-TSN domains.

Advances in automotive technology require networks to support a variety of communication requirements, such as reliability, real-time performance, low jitter, and strict delay limits. Time-Sensitive Network (TSN) is a keyframe transmission delay-guaranteed solution based on the IEEE 802 architecture of the automotive Ethernet. However, most of the existing studies on automotive TSN performance are based on a single mechanism, lacking a complete and systematic research tool. At the same time, the design method should be considered from a global perspective when designing an automotive TSN system, rather than only considering a single mechanism that TSN applies to. This paper discusses the correspondence between traffic types and automotive scenarios and proposes a methodology to target the delay constraint of traffic types as the design goal of automotive TSN networks. To study the performance of automotive TSN under different mechanisms such as time-aware shaper (TAS), credit-based shaper (CBS), cyclic queuing and forwarding (CQF), etc., this paper also develops a systematic automotive TSN simulation system based on OMNeT++. The simulation system plays a crucial role in the whole methodology, including all applicable TSN standards for the automotive field. Lastly, a complex automotive scenario based on zonal architecture provided by a major motor company in Shanghai is analyzed in the simulated system; verifying TSN can guarantee real-time performance and reliability of the in-vehicle network.

Time-Sensitive Networking (TSN) aims to provide deterministic communications over Ethernet. The main characteristics of TSN are bounded latency and very high reliability, thus complying with the strict requirements of industrial communications or automotive applications, to name a couple of examples. In order to achieve this goal, TSN defines several scheduling algorithms, among them the Time-Aware Shaper (TAS), which is based on time slots and Gate Control Lists (GCLs). The configuration of network elements to allocate time slots, paths, and GCLs is laborious, and has to be updated promptly and in a dynamic way, as new data flows arrive or disappear. The IEEE 802.1Qcc standard provides the basis to design a TSN control plane to face these challenges, following the Software-Defined Networking (SDN) paradigm. However, most of the current SDN/TSN control plane solutions are monolithic applications designed to run on dedicated servers, and do not provide the required flexibility to escalate when facing increasing service requests. This work presents μTSN-CP, an SDN/TSN microservices-based control plane, based on the 802.1Qcc standard. Our architecture leverages the advantages of microservices, enabling the control plane to scale up or down in response to varying workloads dynamically. We achieve enhanced flexibility and resilience by breaking down the control plane into smaller, independent microservices. The performance of μTSN-CP is evaluated in a real environment with TSN switches, and various integer linear problem solvers, running over different computing platforms.

Language plays an important role in human life that can be seen from various perspectives such as the cultural perspective, linguistic perspective, social perspective, psychological perspective, perspective of gender and moral and ethical perspectives. This is undoubtedly a proven fact that we use language and at the same time, language uses us to define, designate, tag and shape our places in the society (Cameron, 2005). This role of language is generally suitable for all human race either male or female but the basic purpose of this study is to explain how language shapes a woman’s place and identity in society. Often we find that women face linguistic discrimination in two different ways: one is the way; they are taught to speak and use language and the other way is about how language treats them (Lakoff, 2004). These linguistic disparities tend to specify a woman’s role and function in the society as a sex object, a servant, a wife, a daughter, a mother and specifically a woman (Kerber, 1988). The researcher collected the data for this study from Ibsen’s (1999) ‘A Doll’s House’ in which different lexical items, phrases and sentences were uttered intentionally to explain the role of the main character Nora as a wife, as a daughter and as a woman. The researcher examined the speeches of different characters only to show the language –made and man- made places of women in the society. For this purpose, the researcher used a theoretical framework based on the qualitative approach while consulting the related ideas of Lakoff (2004) who, in her ‘Dominance Theory,’ explains how language shapes a woman’s place in the society by analyzing her own speeches and the speeches of different people in the society. The findings of the study go a long way in telling people and the upcoming researchers that language not only specifies gender roles individually, but also internally and externally as well. Basically different social characters surrounding a woman use language in such a way that it starts shaping a woman’s character in different sub- characters as explained in the work of Ibsen (1999). Furthermore, language use tells us that a man remains a man in every situation either as a father, as a husband, as a son, and above all as a man but a woman’s place in society is changeable according to language use and those tagged names that men have used for women ever. For example, if a little girl talks roughly like a boy, she is scolded by her parents and friends (Lakoff, 2004). This process of socialization is harmful in the sense that it is making women weak, incapable and less –confident but if we analyze the last lines spoken by Nora in the selected text of Ibsen (1999), we come to know that constant battering and hammering of socialization and generalization are now making women aware of their individual place and identity in the society and they are now looking at life from a different perspective that is still unacceptable in the man-made society (Kramer, 1974). This study will open new avenues for sociolinguists to study language and gender keenly and critically.

Language plays an important role in human life that can be seen from various perspectives such as the cultural perspective, linguistic perspective, social perspective, psychological perspective, perspective of gender and moral and ethical perspectives. This is undoubtedly a proven fact that we use language and at the same time, language uses us to define, designate, tag and shape our places in the society (Cameron, 2005). This role of language is generally suitable for all human race either male or female but the basic purpose of this study is to explain how language shapes a woman’s place and identity in society. Often we find that women face linguistic discrimination in two different ways: one is the way; they are taught to speak and use language and the other way is about how language treats them (Lakoff, 2004). These linguistic disparities tend to specify a woman’s role and function in the society as a sex object, a servant, a wife, a daughter, a mother and specifically a woman (Kerber, 1988). The researcher collected the data for this study from Ibsen’s (1999) ‘A Doll’s House’ in which different lexical items, phrases and sentences were uttered intentionally to explain the role of the main character Nora as a wife, as a daughter and as a woman. The researcher examined the speeches of different characters only to show the language –made and man- made places of women in the society. For this purpose, the researcher used a theoretical framework based on the qualitative approach while consulting the related ideas of Lakoff (2004) who, in her ‘Dominance Theory,’ explains how language shapes a woman’s place in the society by analyzing her own speeches and the speeches of different people in the society. The findings of the study go a long way in telling people and the upcoming researchers that language not only specifies gender roles individually, but also internally and externally as well. Basically different social characters surrounding a woman use language in such a way that it starts shaping a woman’s character in different sub- characters as explained in the work of Ibsen (1999). Furthermore, language use tells us that a man remains a man in every situation either as a father, as a husband, as a son, and above all as a man but a woman’s place in society is changeable according to language use and those tagged names that men have used for women ever. For example, if a little girl talks roughly like a boy, she is scolded by her parents and friends (Lakoff, 2004). This process of socialization is harmful in the sense that it is making women weak, incapable and less –confident but if we analyze the last lines spoken by Nora in the selected text of Ibsen (1999), we come to know that constant battering and hammering of socialization and generalization are now making women aware of their individual place and identity in the society and they are now looking at life from a different perspective that is still unacceptable in the man-made society (Kramer, 1974). This study will open new avenues for sociolinguists to study language and gender keenly and critically.

<p><strong>Abstract.</strong> This work is on development within the framework of the project Eureca: <i>EUropean Region Enrichment in City Archives and collections</i> of the University of Ghent (IDLab, CartoGIS), the Technical University of Vienna (Research Group Cartography) and several city and state archives. <i>Eureca</i> focuses on revealing traces (i.e. origins or influences) of European regions that have shaped the cities in which we live today and will further develop tools to explore these traces when visiting a city. Different historical, architectural, economic, political, and cultural reasons form the base of these traces, and will be used as input to disclose cultural heritage items that can be linked to specific European regions and origins. The enriched metadata that will result in this project will be further usable to perform new fundamental research and applied studies, and to facilitate the exploitation of the collections to a broader public and attract new groups of cultural heritage consumers.</p><p>The specific focus of this work is on Geo-Social media (GSM) (Ostermann, 2015) as a source of information to identify these European traces of the past. The objective of this research is finding the <i>footprint</i> of Europeans visiting other euro-cities by determining areas of preference in a city for specific nationalities and during certain periods. The footprints represent areas of attraction for visitors in the city and the reasons for this attraction could be multiple: available services, architecture, historical/cultural hotspots, etc. Finding these modern footprints will be a base to identify the most visited cultural heritage points of interest (POIs) for specific nationalities or even cities of origin and during specific periods of the year. Finally, this will contribute to the development of location based services (LBS) that will help users to explore traces of their own region of origin in other European cities.</p><p>Social media data have been used in research widely and despite their multiple limitations, they have been proven useful for geographic research in different fields. Geotagged social media provide better insights on the spatial behaviour of their users. Some of the most used media in the literature include Foursquare, Twitter or Flickr. Foursquare is the least interesting for us because of its user base and amount of data available. Twitter provides a huge amount of geotagged text for semantic analysis but Flickr’s user profile is more suited for tourist behaviour analysis. Furthermore, Flickr provides a well-developed set of Application Programming Interfaces (APIs) to enable easier access to their data.</p><p>The first phase of this research involved the data collection from Flickr via two of its APIs. There are several Flickr datasets openly available, nevertheless we opted for building our own collection to avoid problems related to accessibility, accuracy and temporal coverage. Metadata of each uploaded picture such as photo owner, uploading date, geolocation, etc. was retrieved. In a second process, another API will be used to obtain the user name, location (user manually-provided) and other attributes. This location attribute have to be processed because of the heterogeneity of the data format. If only <i>city</i> is provided, the places have to be matched to a gazetteer to determine the country.</p><p>The data retrieved covered a squared area of 68 Mill.&amp;thinsp;km² representing a huge area around the continental Europe. In order to determine the nationality of each user the first source of information is the self-reported location included in her profile. Unfortunately, this information is often missing or can be simply false. For the majority of the users, the home location has to be inferred by some kind of method. A simple method based on previous works on home determination from user’s GSM data (Li &amp; Goodchild, 2012; Bojic et al., 2015) was developed and tested. To identify a country as user’s home location, all the pictures uploaded during a year in each country were considered. If the temporal difference between last and first photo was greater than 6 months, the user was labelled as local resident in that country. For comparison purposes, a second threshold of 3 months was also applied. With both thresholds, in some cases users were labelled with double home location because of being present in both cities in the same year.</p><p>We are aware of some limitations of this approach. For instance, a user can visit two times the same city in the same year. Besides, those users uploading pictures between the end of one year and the beginning of the following one will not be classified in that country. The nature of the Flickr user is a limitation itself; some individuals can upload one single photo and others may contribute thousands.</p><p>The method will be improved in future work by requiring a minimum of images uploaded during the chosen period. Also, it will be analysed the continuous stream of uploads during time instead of simply considering natural years. Additionally, the language of the title and tags could be used to infer the nationality. Moreover, the first information that will be taken into consideration is the self-reported home location obtained from the user’s profile. This new approach will increase the number of users correctly labelled so that we can get a better differentiation between locals and tourists and between different nationalities. This will be key for our further analysis.</p><p>The uploaded photos can be visualised as points in the space given that we have their geolocation. We can generate a continuous raster surface from these points using Kernel Density Estimation (KDE) (Grothe &amp; Schaab, 2009). These raster are heatmaps that represent areas of high concentration of pictures. These heatmaps represent a footprint of the visitors in the city. Thus, the areas more visited by tourists from a specific origin will be visible and also an analysis of the temporal evolution will be possible. The continuous surfaces built with KDE are very well suited for the task of determining vague areas open enough for further POIs identification in <i>Eureca</i>. In addition, to include areas of interest (AOIs) when dealing with open spaces like parks, squares or large buildings. Figure 1 shows examples of footprints in Vienna and Ghent.</p><p>The footprints will reveal the most preferred places for specific origins. Furthermore, all the footprints will be compared through spatial analysis. Using map algebra (Tomlin, 1990), we will obtain areas of common interest for Europeans and for instance classify the areas as high, moderate or low “Euro-visitor interest”. This can be applied for aggregated groups e.g. Mediterranean nations, German-speaking countries, etc. In further steps, Flickr data from the rest of the world will be collected to apply the same approach for more groups.</p><p>Regarding the results already obtained, the final number of points retrieved was about 66 million and covered a period (2004&amp;ndash;2018) representing Flickr photos from 62 countries. Initial research was done with a selection of 2 European cities and countries: Ghent (Belgium) and Vienna (Austria). Next steps will include all those countries fully retrieved from Flickr and the 10 European capitals with the highest amount of data available.</p><p>Several conclusions can be drawn from the initial results. The number of photos available for each city can vary greatly; this has to be considered in terms of relative representativeness. The inclusion of the self-reported user information should improve the theoretical accuracy of the user home location determination. It could serve as some kind of ground truth to estimate precision and recall of our own classification method. Increasing the dataset with world coverage and classifying the home location of all the global users should reduce the number of ambivalent cases by applying other strategies. In sum, further work is required but this initial approach seems to be useful for establishing GSM as a valuable modern source of information to identify cultural heritage POIs/AOIs that will reveal European traces of the past within the <i>Eureca</i> project.</p>

AbstractIEEE 802.1 Time‐Sensitive Networking (TSN) has proposed several shapers, for example, time‐aware shaper (TAS, 802.1Qbv), asynchronous traffic shaping (ATS, 802.1Qcr), credit‐based shaper (CBS, 802.1Qav), and cyclic queuing and forwarding (CQF, 802.1Qch). The shapers have their advantages and disadvantages and can be used in isolation or in combination to address the varied timing requirements of industrial application streams. There is very limited work on how to analyse and configure shaper combinations. The authors are interested in the configuration optimisation of multi‐shaper TSN networks, targeting the TAS + CBS, TAS + ATS, and TAS + Multi‐CQF combinations. The authors first propose multi‐shaper integration approaches, focusing on a novel iterative delay analysis for TAS + ATS, an approach to integrate TAS and CQF by placing constraints on TAS scheduling as well as the TAS and CBS integration. We formulate the combinatorial optimisation problem of configuring multi‐shaper TSN networks, which consists, for example, of the routing of streams, the assignment of streams to the egress port queues, and the synthesis of gate control lists for TAS. Then, the authors propose a solution based on a simulated annealing metaheuristic. The proposed solutions are evaluated on large realistic test cases, up to tens of thousands of streams and devices.

AbstractThe Time Sensitive Networking Task Group of the IEEE 802.1 Working Group has developed a number of enhancements to the priority queueing architecture used by Ethernet. Perhaps the most notable one is the time-aware shaper (TAS), which can perfectly isolate priority classes in time with periodically scheduled traffic gates, thereby enabling ultra low latency applications to coexist with lower priority traffic on the same network. It requires near-perfect clock synchronization across the entire network, though, and a central network controller to calculate the timings for the traffic gates, based on known propagation delays on the network links. As a cheaper alternative, we have developed the asynchronous TAS that needs no clock synchronization, network planning, or a central controller. It uses local processes at each switch port to track the high priority streams, predict the arrival times of their next frames, and control the traffic gates such that the low priority streams are not interfering. We show how a simple predictor with minimal computation requirements can be used to track the high priority streams, and we demonstrate via simulations that this gating mechanism can protect the high priority traffic from interference.

Cybersickness and control-loop instabilities are two main concerns in Tactile Cyber-Physical Systems (TCPS). TCPS applications demand stringent bounds on end-to-end latencies to avoid their occurrences. Traditional best-effort networks cannot guarantee packet latencies in the presence of external traffic. On the other hand, emerging deterministic networks such as IEEE 802.1 Time-Sensitive Networking (TSN) can isolate time-critical flows from external traffic using IEEE 802.1Qbv Time-Aware Shaper (TAS) to guarantee bounded end-to-end packet latencies. In this work, we develop eDDSCH-TSN, a decentralized dynamic scheduling protocol to configure non-overlapping gate slots in TAS enabled TSN switches to support TCPS flows. eDDSCH-TSN supports plug-and-play operation of compatible TCPS terminals with guaranteed minimal end-to-end packet latencies. Compared to the state-of-the-art, eDDSCH-TSN provides three orders lower end-to-end packet latencies for TCPS flows in mid-size networks with ten hops between source and destination terminals. Further, we also present PYTSN, an open-source discrete-event TSN simulator which we use for evaluating eDDSCH-TSN. In particular, we use PYTSN to show the isolation of TCPS flows from external traffic and plug and play operation of TCPS terminals.

AbstractThe new intelligent factory introduces Time-Sensitive Network into industrial Ethernet to provide real time and deterministic guarantee communication for production system. Since the problem pertaining to data leakage or damage during transmission has increasingly become pronounced, security protection technology has been introduced, but this technology will bring about a delay in user response and a decline in the quality of service. Meanwhile, ensuring the deterministic mixed transmission of time-sensitive and large-bandwidth data traffic supported by the same switching device is a still challenging problem. Therefore, this study proposes a hybrid security scheduling scheme which combines Time-Aware Shaper and cycle specified queuing and forwarding (CSQF). Specifically, the mechanism first adopts various encryption methods for different traffic, and afterward, it reduces its resource occupation by adjusting the sampling period of the time-sensitive traffic. At the same time, it adopts CSQF to schedule the large-bandwidth data traffic, thereby improving the scheduling success rate. According to the experimental results, this scheme enhances network security and network scheduling success rate by up to 51%. The scheduling of mixed traffic in the Time-sensitive Network is realized securely and efficiently.

Our daily environment is surrounded by a paradoxically silent and invisible flow: the coming and going of data through our network cables, routers and wireless devices. This data is not just 1s and 0s, but bits of the conversations, images, sounds, thoughts and other forms of information that result from our interaction with the world around us. If we can speak of a global ambience, it is certainly derived from this constant flow of data. It is an endless murmur that speaks to our machines and gives us a sense of awareness of a certain form of surrounding that is independent from our actual, physical location. The constant “presence” of data around us is something that we have become largely aware of. Already in 1994, Phil Agre stated in an article in WIRED Magazine: “We're so accustomed to data that hardly anyone questions it” (1). Agre indicated that this data is in fact a representation of the world, the discrete bits of information that form the reality we are immersed in. He also proposed that it should be “brought to life” by exploring its relationships with other data and the world itself. A decade later, these relationships had become the core of the new paradigm of the World Wide Web and our interaction with cyberspace. As Mitchell Whitelaw puts it: “The web is increasingly a set of interfaces to datasets ... . On the contemporary web the data pour has become the rule, rather than the exception. The so-called ‘web 2.0’ paradigm further abstracts web content into feeds, real-time flows of XML data” ("Art against Information"). These feeds and flows have been used by artists and researchers in the creation of different forms of dynamic visualisations, in which data is mapped according to a set of parameters in order to summarise it in a single image or structure. Lev Manovich distinguishes in these visualisations those made by artists, to which he refers as “data art”. Unlike other forms of mapping, according to Manovich data art has a precise goal: “The more interesting and at the end maybe more important challenge is how to represent the personal subjective experience of a person living in a data society” (15). Therefore, data artists extract from the bits of information available in cyberspace a dynamic representation of our contemporary environment, the ambience of our digital culture, our shared, intimate and at the same time anonymous, subjectivity. In this article I intend to present some of the ways in which artists have dealt with the murmur of data creatively, exploring the immense amounts of user generated content in forms that interrogate our relationship with the virtual environment and the global community. I will discuss several artistic projects that have shaped the data flow on the Internet in order to take the user back to a state of contemplation, as a listener, an observer, and finally encountering the virtual in a physical form. Listening The concept of ambience particularly evokes an auditory experience related to a given location: in filmmaking, it refers to the sounds of the surrounding space and is the opposite of silence; as a musical genre, ambient music contributes to create a certain atmosphere. In relation to flows of data, it can be said that the applications that analyze Internet traffic and information are “listening” to it, as if someone stands in a public place, overhearing other people's conversations. The act of listening also implies a reception, not an emission, which is a substantial distinction given the fact that data art projects work with given data instead of generating it. As Mitchell Whitelaw states: “Data here is first of all indexical of reality. Yet it is also found, or to put it another way, given. ... Data's creation — in the sense of making a measurement, framing and abstracting something from the flux of the real — is left out” (3). One of the most interesting artistic projects to initially address this sort of “listening” is Carnivore (2001) by the Radical Software Group. Inspired by DCS1000, an e-mail surveillance software developed by the FBI, Carnivore (which was actually the original name of the FBI's program) listens to Internet traffic and serves this data to interfaces (clients) designed by artists, which interpret the provided information in several ways. The data packets can be transformed into an animated graphic, as in amalgamatmosphere (2001) by Joshua Davis, or drive a fleet of radio controlled cars, as in Police State (2003) by Jonah Brucker-Cohen. Yet most of these clients treat data as a more or less abstract value (expressed in numbers) that serves to trigger the reactions in each client. Carnivore clients provide an initial sense of the concept of ambience as reflected in the data circulating the Internet, yet other projects will address this subject more eloquently. Fig. 1: Ben Rubin, Mark Hansen, Listening Post (2001-03). Multimedia installation. Photo: David Allison.Listening Post (2001-04) by Mark Hansen and Ben Rubin is an installation consisting of 231 small electronic screens distributed in a semicircular grid [fig.1: Listening Post]. The screens display texts culled from thousands of Internet chat rooms, which are read by a voice synthesiser and arranged synchronically across the grid. The installation thus becomes a sort of large panel, somewhere between a videowall and an altarpiece, which invites the viewer to engage in a meditative contemplation, seduced by the visual arrangement of the flickering texts scrolling on each screen, appearing and disappearing, whilst sedated by the soft, monotonous voice of the machine and an atmospheric musical soundtrack. The viewer is immersed in a particular ambience generated by the fragmented narratives of the anonymous conversations extracted from the Internet. The setting of the piece, isolated in a dark room, invites contemplation and silence, as the viewer concentrates on seeing and listening. The artists clearly state that their goal in creating this installation was to recreate a sense of ambience that is usually absent in electronic communications: “A participant in a chat room has limited sensory access to the collective 'buzz' of that room or of others nearby – the murmur of human contact that we hear naturally in a park, a plaza or a coffee shop is absent from the online experience. The goal of Listening Post is to collect this buzz and render it at a human scale” (Hansen 114-15). The "buzz", as Hansen and Rubin describe it, is in fact nonexistent in the sense that it does not take place in any physical environment, but is rather the imagined output of the circulation of a myriad blocks of data through the Net. This flow of data is translated into audible and visible signals, thus creating a "murmur" that the viewer can relate to her experience in interacting with other humans. The ambience of a room full of people engaged in conversation is artificially recreated and expanded beyond the boundaries of a real space. By extracting chats from the Internet, the murmur becomes global, reflecting the topics that are being shared by users around the world, in an improvised, ever-changing embodiment of the Zeitgeist, the spirit of the time, or even a certain stream of consciousness on a planetary scale. Fig. 2: Gregory Chatonsky, L'Attente - The Waiting (2007). Net artwork. Photo: Gregory Chatonsky.The idea of contemplation and receptiveness is also present in another artwork that elaborates on the concept of the Zeitgeist. L'Attente [The Waiting] (2007) by Gregory Chatonsky is a net art piece that feeds from the data on the Internet to create an open, never-ending fiction in real time [Fig.2: The Waiting]. In this case, the viewer experiences the artwork on her personal computer, as a sort of film in which words, images and sounds are displayed in a continuous sequence, driven by a slow paced soundtrack that confers a sense of unity to the fragmented nature of the work. The data is extracted in real time from several popular sites (photos from Flickr, posts from Twitter, sound effects from Odeo), the connection between image and text being generated by the network itself: the program extracts text from the posts that users write in Twitter, then selects some words to perform a search on the Flickr database and retrieve photos with matching keywords. The viewer is induced to make sense of this concatenation of visual and audible content and thus creates a story by mentally linking all the elements into what Chatonsky defines as "a fiction without narration" (Chatonsky, Flußgeist). The murmur here becomes a story, but without the guiding voice of a narrator. As with Listening Post, the viewer is placed in the role of a witness or a voyeur, subject to an endless flow of information which is not made of the usual contents distributed by mainstream media, but the personal and intimate statements of her peers, along with the images they have collected and the portraits that identify them in the social networks. In contrast to the overdetermination of History suggested by the term Zeitgeist, Chatonsky proposes a different concept, the spirit of the flow or Flußgeist, which derives not from a single idea expressed by multiple voices but from a "voice" that is generated by listening to all the different voices on the Net (Chatonsky, Zeitgeist). Again, the ambience is conceived as the combination of a myriad of fragments, which requires attentive contemplation. The artist describes this form of interacting with the contents of the piece by making a reference to the character of the angel Damiel in Wim Wenders’s film Wings of Desire (Der Himmel über Berlin, 1987): “to listen as an angel distant and proximate the inner voice of people, to place the hand on their insensible shoulder, to hold without being able to hold back” (Chatonsky, Flußgeist). The act of listening as described in Wenders's character illustrates several key aspects of the above mentioned artworks: there is, on the one hand, a receptiveness, carried out by the applications that extract data from the Internet, which cannot be “hold back” by the user, unable to control the flow that is evolving in front of her. On the other hand, the information she receives is always fragmentary, made up of disconnected parts which are, in the words of the artist Lisa Jevbratt, “rubbings ... indexical traces of reality” (1). Observing The observation of our environment takes us to consider the concept of landscape. Landscape, in its turn, acquires a double nature when we compare our relationship with the physical environment and the digital realm. In this sense, Mitchell Whitelaw stresses that while data moves at superhuman speed, the real world seems slow and persistent (Landscape). The overlapping of dynamic, fast-paced, virtual information on a physical reality that seems static in comparison is one of the distinctive traits of the following projects, in which the ambience is influenced by realtime data in a visual form that is particularly subtle, or even invisible to the naked eye. Fig. 3: Carlo Zanni, The Fifth Day (2009). Net artwork. Screenshot retrieved on 4/4/2009. Photo: Carlo Zanni. The Fifth Day (2009) by Carlo Zanni is a net art piece in which the artist has created a narration by displaying a sequence of ten pictures showing a taxi ride in the city of Alexandria [Fig.3: The Fifth Day]. Although still, the images are dynamic in the sense that they are transformed according to data retrieved from the Internet describing the political and cultural status of Egypt, along with data extracted from the user's own identity on the Net, such as her IP or city of residence. Every time a user accesses the website where the artwork is hosted, this data is collected and its values are applied to the photos by cloning or modifying particular elements in them. For instance, a photograph of a street will show as many passersby as the proportion of seats held by women in national parliament, while the reflection in the taxi driver's mirror in another photo will be replaced by a picture taken from Al-Jazeera's website. Zanni addresses the viewer's perception of the Middle East by inserting small bits of additional information and also elements from the viewer's location and culture into the images of the Egyptian city. The sequence is rendered as the trailer of a political thriller, enhanced by a dramatic soundtrack and concluded with the artwork's credits. As with the abovementioned projects, the viewer must adopt a passive role, contemplating the images before her and eventually observing the minute modifications inserted by the data retrieved in real time. Yet, in this case, the ambience is not made manifest by a constant buzz to which one must listen, but quite more subtly it is suggested by the fact that not even a still image is always the same. As if observing a landscape, the overall impression is that nothing has changed while there are minor transformations that denote a constant evolution. Zanni has explored this idea in previous works such as eBayLandscape (2004), in which he creates a landscape image by combining data extracted from several websites, or My Temporary Visiting Position from the Sunset Terrace Bar (2007), in which a view of the city of Ahlen (Germany) is combined with a real time webcam image of the sky in Naples (Italy). Although they may seem self-enclosed, these online, data-driven compositions also reflect the global ambience, the Zeitgeist, in different forms. As Carlo Giordano puts it: "Aesthetically, the work aims to a nearly seamless integration of mixed fragments. The contents of these parts, reflecting political and economical issues ... thematize actuality and centrality, amplifying the author's interest in what everybody is talking about, what happens hic et nunc, what is in the fore of the media and social discourse" (16-17). A landscape made of data, such as Zanni's eBayLandscape, is the most eloquent image of how an invisible layer of information is superimposed over our physical environment. Fig. 4: Clara Boj and Diego Díaz, Red Libre, Red Visible (2004-06). Intervention in the urban space. Photo: Lalalab.Artists Clara Boj and Diego Díaz, moreover, have developed a visualisation of the actual flows of data that permeate the spaces we inhabit. In Red Libre, Red Visible [Free Network, Visible Network] (2004-06), Boj and Díaz used Augmented Reality (AR) technology to display the flows of data in a local wireless network by creating AR marker tags that were placed on the street. A Carnivore client developed by the artists enabled anyone with a webcam pointing towards the marker tag and connected to the Wi-Fi network to see in real time the data packets flowing from their computer towards the tag [Fig.4: Red Libre]. The marker tags therefore served both as a tool for the visualisation of network activity as well as a visual sign of the existence of an open network in a particular urban area. Later on, they added the possibility of inserting custom made messages, 3D shapes and images that would appear when a particular AR marker tag was seen through the lens of the webcam. With this project, Boj and Díaz give the user the ability to observe and interact with a layer of her environment that was previously invisible and in some senses, out of reach. The artists developed this idea further in Observatorio [Observatory] (2008), a sightseeing telescope that reveals the existence of Wi-Fi networks in an urban area. In both projects, an important yet unnoticed aspect of our surroundings is brought into focus. As with Carlo Zanni's projects, we are invited to observe what usually escapes our perception. The ambience in our urban environment has also been explored by Julian Oliver, Clara Boj, Diego Díaz and Damian Stewart in The Artvertiser (2009-10), a hand-held augmented reality (AR) device that allows to substitute advertising billboards with custom made images. As Naomi Klein states in her book No Logo, the public spaces in most cities have been dominated by corporate advertising, allowing little or no space for freedom of expression (Klein 399). Oliver's project faces this situation by enabling a form of virtual culture jamming which converts any billboard-crowded plaza into an unparalleled exhibition space. Using AR technology, the artists have developed a system that enables anyone with a camera phone, smartphone or the customised "artvertiser binoculars" to record and substitute any billboard advertisement with a modified image. The user can therefore interact with her environment, first by observing and being aware of the presence of these commercial spaces and later on by inserting her own creations or those of other artists. By establishing a connection to the Internet, the modified billboard can be posted on sites like Flickr or YouTube, generating a constant feedback between the real location and the Net. Gregory Chatonsky's concept of the Flußgeist, which I mentioned earlier, is also present in these works, visually displaying the data on top of a real environment. Again, the user is placed in a passive situation, as a receptor of the information that is displayed in front of her, but in this case the connection with reality is made more evident. Furthermore, the perception of the environment minimises the awareness of the fragmentary nature of the information generated by the flow of data. Embodying In her introduction to the data visualisation section of her book Digital Art, Christiane Paul stresses the fact that data is “intrinsically virtual” and therefore lacking a particular form of manifestation: “Information itself to a large extent seems to have lost its 'body', becoming an abstract 'quality' that can make a fluid transition between different states of materiality” (Paul 174). Although data has no “body”, we can consider, as Paul suggests, any object containing a particular set of information to be a dataspace in its own. In this sense, a tendency in working with the Internet dataflow is to create a connection between the data and a physical object, either as the end result of a process in which the data has been collected and then transferred to a physical form, or providing a means of physically reshaping the object through the variable input of data. The objectification of data thus establishes a link between the virtual and the real, but in the context of an artwork it also implies a particular meaning, as the following examples will show.Fig. 5: Gregory Chatonsky, Le Registre - The Register (2007). Book shelf and books. Photo: Pau Waelder. In Le Registre [The Register] (2007), Gregory Chatonsky developed a software application that gathers sentences related to feelings found on blogs. These sentences are recorded and put together in the form a 500-page book every hour. Every day, the books are gathered in sets of 24 and incorporated to an infinite library. Chatonsky has created a series of bookshelves to collect the books for one day, therefore turning an abstract process into an object and providing a physical embodiment of the murmur of data that I have described earlier [Fig.5: Le Registre]. As with L'Attente, in this work Chatonsky elaborates on the concept of Flußgeist, by “listening” to a specific set of data (in a similar way as in Hansen and Rubin's Listening Post) and bringing it into salience. The end product of this process is not just a meaningless object but actually what makes this work profoundly ironic: printing the books is a futile effort, but also constitutes a borgesque attempt at creating an endless library of something as ephemeral as feelings. In a similar way, but with different intentions, Jens Wunderling brings the online world to the physical world in Default to Public (2009). A series of objects are located in several public spaces in order to display information extracted from users of the Twitter network. Wunderling's installation projects the tweets on a window or prints them in adhesive labels, while informing the users that their messages have been taken for this purpose. The materialisation of information meant for a virtual environment implies a new approach to the concept of ambiance as described previously, and in this case also questions the intimacy of those participating in social networks. As the artist puts it: "In times of rapid change concerning communication behavior, media access and competence, the project Default to Public aims to raise awareness of the possible effects on our lives and our privacy" (Wunderling 155). Fig. 6: Moisés Mañas, Stock (2009). Networked installation. Photo: Moisés Mañas. Finally, in Stock (2009), Moisés Mañas embodies the flow of data from stock markets in an installation consisting of several trench coats hanging from automated coat hangers which oscillate when the stock values of a certain company rise. The resulting movement of the respective trench coat simulates a person laughing. In this work, Mañas translates the abstract flow of data into a clearly understandable gesture, providing at the same time a comment on the dynamics of stock markets [Fig.6: Stock]. Mañas´s project does not therefore simply create a physical output of a specific information (such as the stock value of a company at any given moment), but instead creates a dynamic sculpture which suggests a different perception of an otherwise abstract data. On the one hand, the trenchcoats have a ghostly presence and, as they move with unnatural spams, they remind us of the Freudian concept of the Uncanny (Das Umheimliche) so frequently associated with robots and artificial intelligence. On the other hand, the image of a person laughing, in the context of stock markets and the current economical crisis, becomes an ironic symbol of the morality of some stockbrokers. In these projects, the ambience is brought into attention by generating a physical output of a particular set of data that is extracted from certain channels and piped into a system that creates an embodiment of this immaterial flow. Yet, as the example of Mañas's project clearly shows, objects have particular meanings that are incorporated into the artwork's concept and remind us that the visualisation of information in data art is always discretionary, shaped in a particular form in order to convey the artist's intentions. Beyond the Buzz The artworks presented in this article revealt that, beyond the murmur of sentences culled from chats and blogs, the flow of data on the Internet can be used to express our difficult relationship with the vast amount of information that surrounds us. As Mitchell Whitelaw puts it: “Data art reflects a contemporary worldview informed by data excess; ungraspable quantity, wide distribution, mobility, heterogeneity, flux. Orienting ourselves in this domain is a constant challenge; the network exceeds any overview or synopsis” (Information). This excess is compared by Lev Manovich with the Romantic concept of the Sublime, that which goes beyond the limits of human measure and perception, and suggests an interpretation of data art as the Anti-Sublime (Manovich 11). Yet, in the projects that I have presented, rather than making sense of the constant flow of data there is a sort of dialogue, a framing of the information under a particular interpretation. Data is channeled through the artworks's interfaces but remains as a raw material, unprocessed to some extent, retrieved from its original context. These works explore the possibility of presenting us with constantly renewed content that will develop and, if the artwork is preserved, reflect the thoughts and visions of the next generations. A work constantly evolving in the present continuous, yet also depending on the uncertain future of social network companies and the ever-changing nature of the Internet. The flow of data will nevertheless remain unstoppable, our ambience defined by the countless interactions that take place every day between our divided self and the growing number of machines that share information with us. References Agre, Phil. “Living Data.” Wired 2.11 (Nov. 1994). 30 April 2010 ‹http://www.wired.com/wired/archive/2.11/agre.if.html›. Chatonsky, Gregory. “Flußgeist, une fiction sans narration.” Gregory Chatonsky, Notes et Fragments 13 Feb. 2007. 28 Feb. 2010 ‹http://incident.net/users/gregory/wordpress/13-flusgeist-une-fiction-sans-narration/›. ———. “Le Zeitgeist et l'esprit de 'nôtre' temps.” Gregory Chatonsky, Notes et Fragments 21 Jan. 2007. 28 Feb. 2010 ‹http://incident.net/users/gregory/wordpress/21-le-zeigeist-et-lesprit-de-notre-temps/›. Giordano, Carlo. Carlo Zanni. Vitalogy. A Study of a Contemporary Presence. London: Institute of Contemporary Arts, 2005. Hansen, Mark, and Ben Rubin. “Listening Post.” Cyberarts 2004. International Compendium – Prix Ars Electronica 2004. Ed. Hannes Leopoldseder and Christine Schöpf. Ostfildern: Hate Cantz, 2004. 112-17. ———. “Babble Online: Applying Statistics and Design to Sonify the Internet.” Proceedings of the 2001 International Conference on Auditory Display, Espoo, Finland. 30 April 2010 ‹http://www.acoustics.hut.fi/icad2001/proceedings/papers/hansen.pdf›. Jevbratt, Lisa. “Projects.” A::minima 15 (2003). 30 April 2010 ‹http://aminima.net/wp/?p=93&language=en›. Klein, Naomi. No Logo. [El poder de las marcas]. Barcelona: Paidós, 2007. Manovich, Lev. “Data Visualization as New Abstraction and Anti-Sublime.” Manovich.net Aug. 2002. 30 April 2010 ‹http://www.manovich.net/DOCS/data_art_2.doc›. Paul, Christiane. Digital Art. London: Thames & Hudson, 2003. Whitelaw, Mitchell. “Landscape, Slow Data and Self-Revelation.” Kerb 17 (May 2009). 30 April 2010 ‹http://teemingvoid.blogspot.com/2009/05/landscape-slow-data-and-self-revelation.html›. ———. “Art against Information: Case Studies in Data Practice.” Fibreculture 11 (Jan. 2008). 30 April 2010 ‹http://journal.fibreculture.org/issue11/issue11_whitelaw.html›. Wunderling, Jens. "Default to Public." Cyberarts 2009. International Compendium – Prix Ars Electronica 2004. Ed. Hannes Leopoldseder, Christine Schöpf and Gerfried Stocker. Ostfildern: Hate Cantz, 2009. 154-55.

The story of Barbie is a tapestry woven with threads of cultural significance, societal shifts, and corporate narratives. It’s a tale that encapsulates the evolution of American post-war capitalism, mirroring the changing tides of social norms, aspirations, and identities. Barbie’s journey from Germany to Los Angeles, along the way becoming a global icon, is a testament to the power of Ruth Handler’s vision and Barbie’s marketing. Barbie embodies and reflects the rise of mass consumption and the early days of television advertising, where one doll could become a household name and shape the dreams of children worldwide. The controversies and criticisms surrounding Barbie – from promoting a ‘thin ideal’ to perpetuating gender and racial stereotypes – highlight the complexities of representation in popular culture. Yet, Barbie’s enduring message, “You can be anything”, continues to inspire and empower, even as it evolves to embrace a more inclusive and diverse portrayals of power, beauty, and potential. Barbie’s story is not just about a doll; it’s about the aspirations she represents, the societal changes she’s witnessed, and the ongoing conversation about her impact on gender roles, body image, and consumer culture. It’s a narrative that continues to unfold, as Barbie adapts to the times and remains a symbol of possibility. Barbie: A Popular Culture Icon “It is impossible to conceive of the toy industry as being anything other than dependent on a popular culture which shapes and structures the meanings carried by toys” (Fleming 40). The relationship between toys and popular culture is symbiotic. While popular culture influences the creation of toys, toys also contribute to the spread and longevity of cultural icons and narratives. Today, one of the most influential, popular, and contested toys of the twentieth century is Mattel’s Barbie doll. Her launch at the New York Toy Fair on 9 March 1959 by Mattel co-founder Ruth Handler was a game-changer in the toy industry. Her adult appearance, symbolised by her fashionable swimsuit and ponytail, was a bold move by Mattel. Despite the doubts from the toy industry which thought nobody would want to play with a doll that had breasts (Tamkin) and Mattel’s skepticism of its commercial success (Westenhouser 14), Barbie was a success, selling over 350,000 units in her first year, and she quickly became an iconic figure, paving the way for other male and female adult dolls. For the first time in mid-century America, Barbie meant children could play with a doll that looked like a woman, not a little girl or a baby. In a 1965 interview, Ruth Handler argued that American girls needed a doll with a “teen-age figure and a lot of glorious, imaginative, high-fashion clothes” (cited in Giacomin and Lubinski 3). In a 1993 interview, Handler said it was “important that Barbie allowed play situations that little girls could project themselves into … to imagine, pretend and to fantasize”. Hence Ruth Handler’s Barbie could be an “avatar for girls to project their dreams onto” (Southwell). Barbie hit the market with a “sassy ponytail, heavy eyeliner, a healthy dose of side-eye and a distinctly adult body” (Blackmore). Her arched eyebrows were matched with a coy sideways glance reflecting her sexual origins (Thong). Mattel did not reveal that Ruth Handler’s Barbie was inspired by a German novelty men’s toy, Bild Lilli, which Handler had purchased on a European holiday in 1955. Mattel fought several lawsuits and eventually secured the rights to Bild Lilli in 1964, which required the German maker of the Bild Lilli doll to not make her again. Barbie dolls, both blonde and brunette, changed little until 1967, when Mattel launch the ‘new’ Barbie doll which is the foundation for today’s Stereotypical Barbie. The same size as the original, thanks to Mattel engineer Jack Ryan she could twist and turn at the waist. Her facial features were softened, she had ‘real’ eyelashes’ and took on an ‘outdoor look’. The new 1967 version of Barbie originally retailed for US$3.00. Mattel, assuming consumers may not want to buy a new Barbie when they already had one, offered buyers the new Barbie at US$1.50 if they traded in their old 1950s Barbie. The television advertising campaign for the new Barbie featured Maureen McMormick (who would go on to play Marcia Brady in the TV series The Brady Bunch from 1969 to 1974). The original #1 Barbie today sells for over US$25,000 (Reinhard). The most expensive Barbie sold to date was a Stefano Canturi-designed Barbie that sold in 2010 for US$302,500 at Christies in New York (Clarendon). Barbie has been described as “the most successful doll in history”, “the most popular toy in history”, the “empress of fashion dolls” (Rogers 86), the “most famous doll in the world” (Ferorelli), the biggest-selling fashion doll in history (Green and Gellene), and is one if the world’s “most commercially successful toys” (Fleming 41). Barbie is both “idealistic and materialistic” and characterises an “American fantasy” (Tamkin). More so, she is a popular culture icon and “a unique indicator of women’s history” (Vander Bent). The inclusion of Barbie in America’s twentieth-century Time Capsule “cemented her status as a true American icon” (Ford), as did Andy Warhol when he iconised Barbie in his 1968 painting of her (Moore). During the 1950s and 1960s, Barbie’s name was licenced to over 100 companies; while a strategic move that expanded Barbie’s brand presence, it also provided Mattel with substantial royalty payments for decades. This approach helped solidify Barbie’s status as a cultural icon and enabled her to become a lucrative asset for Mattel (Rogers). Sixty-five years later, Barbie has 99% global brand awareness. In 2021, Mattel shipped more than 86 million Barbies globally, manufacturing 164 Barbies a minute (Tomkins). In 2022, Barbie generated gross sales of US$1.49 billion (Statista 2023). With this fiscal longevity and brand recognition, the success of the Barbie film is not surprising. The 2023 film, directed by Greta Gerwig and starring Australian Margot Robbie as Barbie and Canadian Ryan Gosling as Ken, as of March 2024 has a global box office revenue of US$1.45 billion, making it the 14th most successful movie of all time and the most successful movie directed by a woman (Statista 2024). Contested Barbie Despite her popularity, Barbie has been the subject of controversy. Original Barbie’s proportions have been criticised for promoting an unrealistic body image (Thong). Barbie’s appearance has received numerous critiques for “representing an unrealistic beauty standard through its former limited skin tone and hair combination” (Lopez). The original Barbie’s measurements, if scaled to life-size, would mean Barbie is unusually tall and has a slim figure, with a height of 5 feet 9 inches, a waist of just 18 inches, and hips of approximately 33 inches. Her bust would measure around 32 inches with an under-bust of 22 inches, and her shoulder width would be approximately 28 inches. Original Barbie’s legs, which are proportionally longer than an average human’s, would make up more than half her height (Thong). A 1996 Australian study scaled Barbie and Ken to adult sizes and compared this with the physical proportions of a range of women and men. They found that the likelihood of finding a man of comparable shape to Ken was 1 in 50. Barbie was more problematic. The chance of a woman being the same proportion as Barbie was 1 in 100,000 (Norton et al. 287). In 2011, The Huffington Post’s Galia Slayen built a life-sized Barbie based on Barbie’s body measurements for National Eating Disorder Awareness Week. Slayen concluded that “if Barbie was a real woman, she’d have to walk on all fours due to her proportions”. One report found that if Barbie’s measurements were those of a real woman her “bones would be so frail, it would be impossible for her to walk, and she would only have half a liver” (Golgowski). A 2006 study found that Barbie is a “possible cause” for young girls’ “body dissatisfaction”. In this study, 162 girls from age 5 to 8 were exposed to images of a thin doll (Barbie), a plus-size doll (US doll Emme, size 16), or no doll, and then completed assessments of body image. Girls exposed to Barbie reported “lower body esteem and greater desire for a thinner body shape than girls in the other exposure conditions”. The study concluded that “early exposure to dolls epitomizing an unrealistically thin body ideal may damage girls' body image, which would contribute to an increased risk of disordered eating and weight cycling” (Dittman and Halliwell 283). Another study in 2016 found that “exposure to Barbie” led to “higher thin-ideal internalization”, but found that Barbie had no “impact on body esteem or body dissatisfaction” (Rice et al. 142). In response to such criticism, Mattel slowly introduced a variety of Barbie dolls with more diverse body types, including tall, petite, and curvy models (Tamkin). These changes aim to reflect a broader range of beauty standards and promote a more positive body image. Barbie has always had to accommodate social norms. For this reason, Barbie always must have underpants, and has no nipples. One of the reasons why Ruth Handler’s husband Elliott (also a co-founder of Mattel) was initially against producing the Barbie doll was that she had breasts, reportedly saying mothers would not buy their daughters a doll with breasts (Gerber). Margot Robbie, on playing Barbie, told one news outlet that while Barbie is “sexualized”, she “should never be sexy” (Aguirre). Early prototypes of Barbie made in Japan in the 1950s sexualised her body, leaving her to look like a prostitute. In response, Mattel hired film make-up artist Bud Westmore to redo Barbie’s face and hair with a softer look. Mattel also removed the nipples from the prototypes (Gerber). Barbie’s body and fashion have always seemed to “replicate history and show what was what was happening at the time” (Mowbray), and they also reflect how the female body is continually surveilled. Feminists have had a long history of criticism of Barbie, particularly her projection of the thin ideal. At the 1970 New York Women’s Strike for Equality, feminists shouted “I am not a Barbie doll!” Such debates exemplify the role and impact of toys in shaping and reforming societal norms and expectations. Even the more recent debates regarding the 2023 Barbie film show that Barbie is still a “lightning rod for the messy, knotty contradictions of feminism, sexism, misogyny and body image” (Chappet). Decades of criticism about Barbie, her meaning and influence, have left some to ask “Is Barbie a feminist icon, or a doll which props up the patriarchy?” Of course, she’s both, because “like all real women, Barbie has always been expected to conform to impossible standards” (Chappet). Diversifying Barbie Over the decades Mattel has slowly changed Barbie’s body, including early versions of a black Barbie-like dolls in the 1960s and 1970s such as Francie, Christie, Julia, and Cara. However, it was not until 1980 that Mattel introduced the first black Barbie. African American fashion designer Kitty Black-Perkins, who worked for Mattel from 1971, was the principal designer for black Barbie, saying that “there was a need for the little Black girl to really have something she could play with that looked like her” (cited in Lafond). Black Barbie was marketed as She’s black! She’s beautiful! She’s dynamite! The following year, Asian Barbie was introduced. She was criticised for her nondescript country of origin and dressed in an “outfit that was a mishmash of Chinese, Korean and Japanese ethnic costumes” (Wong). More recently, the Asian Barbies were again criticised for portraying stereotypes, with a recent Asian Barbie dressed as a veterinarian caring for pandas, and Asian violinist Barbie with accompanying violin props, reflecting typical stereotypes of Asians in the US (Wong). In 2016, Mattel introduced a range of Barbie and Ken dolls with seven body types, including more curvy body shapes, 11 skin tones and 28 hairstyles (Siazon). In 2019, other Barbie body types appeared, with smaller busts, less defined waist, and more defined arms. The 2019 range also included Barbies with permanent physical disabilities, one using a wheelchair and one with a prosthetic leg (Siazon). Wheelchair Barbie comes with a wheelchair, and her body has 22 joints for body movement while sitting in the wheelchair. The Prosthetic Barbie comes with a prosthetic leg which can be removed, and was made in collaboration with Jordan Reeve, a 13-year-old disability activist born without a left forearm. In 2020, a No Hair Barbie and a Barbie with the skin condition vitiligo were introduced, and in 2022, Hearing Aid Barbie was also launched. In 2022 other changes were made to Barbie’s and Ken’s bodies, with bodies that became fuller figured and Kens with smaller chests and less masculine body shapes (Dolan). Down Syndrome Barbie was released in 2023, designed in collaboration with the US National Down Syndrome Society to ensure accurate representation. By 2024, Barbie dolls come in 35 skin tones, 97 hairstyles, and nine body types (Mattel 2024). Spanning hundreds of iterations, today the Barbie doll is no longer a homogenous, blond-haired, blue-eyed toy, but rather an evolving social phenomenon, adapting with the times and the markets Mattel expands into. With dolls of numerous ethnicities and body types, Barbie has also embraced inclusivity, catering to the plethora of different consumers across the world (Green and Gellene 1989). Career Barbie While not dismissing Barbie’s problematic place in feminist, gender and racial critiques, Barbie has always been a social influencer. Her early years were marked by a variety of makeovers and modernisations, as have recent changes to Barbie’s body, reflecting the changing social norms of the times. Stereotypical Barbie had her first major makeover in 1961, with her ponytail swapped for a short ‘Bubble Bob’ hairstyle inspired by Jackie Kennedy and Marilyn Monroe, reflecting women’s emerging social independence (Foreman). In the early 1970s, Barbie’s original demure face with averted eyes was replaced by a new one that “depicted confidence and a forward-facing gaze” (Vander Bent). Her “soft look” was a departure from the mature image of the original 1959 Barbie (Lafond). The ‘soft look’ on Malibu Barbie with her newly sculpted face featured an open smile for the first time, as well as sun-tanned, make-up free skin and sun-kissed blonde hair. The disappearance of Barbie’s coy, sideways glance and the introduction of forward-looking eyes was a development “welcomed by feminists” (Ford). Barbie’s early makeovers, along with her fashion and accessories, including her homes, cars, and pets, contributed to shaping her image as a fashionable and independent woman. Barbie’s various careers and roles have been used to promote ideas of female empowerment. From astronaut to presidential candidate, Barbie has broken barriers in traditionally male-dominated fields. However, the effectiveness of these efforts in promoting female empowerment is a topic of debate. The post-war period in America saw a significant shift in the pattern of living, with a move from urban areas to the suburbs. This was facilitated by a robust post-war economy, favourable government policies like the GI Bill, and increasing urbanisation. The GI Bill played a crucial role by providing low-interest home loans to veterans, making home ownership accessible to a large segment of the population. It was a significant transformation of the American lifestyle and shaped the country’s socio-economic landscape. It is in this context that Barbie’s first Dreamhouse was introduced in the early 1960s, with its mid-century modern décor, hi-fi stereo, and slim-line furniture. This was at a time when most American women could not get a mortgage. Barbie got her first car in 1962, a peach-colored Austin-Healey 3000 MKII convertible, followed short afterwards by a Porsche 911. She has also owned a pink Jaguar XJS, a pink Mustang, a red Ferrari, and a Corvette. Barbie’s car choices of luxurious convertibles spoke to Barbie’s social and economic success. In 1998, Barbie became a NASCAR driver and also signed up to race in a Ferrari in the Formula 1. Barbie’s ‘I Can Be Anything’ range from 2008 was designed to draw kids playing with the dolls toward ambitious careers; one of those careers was as a race car driver (Southwell). While Barbie’s first job as a baby-sitter was not as glamourous or well-paying as her most of her other over 250 careers, it does reflect the cultural landscape Barbie was living in in the 1960s. Babysitter Barbie (1963) featured Barbie wearing a long, pink-striped skirt with ‘babysitter’ emblasoned along the hem and thick-framed glasses. She came with a baby in a crib, a telephone, bottles of soda, and a book. The book was called How to Lose Weight and had only two words of advice, ‘Don’t Eat’. Even though there was a backlash to the extreme dieting advice, Mattel included the book in the 1965 Slumber Party Barbie. Barbie wore pink silk pajamas with a matching robe and came prepared for her sleepover with toiletries, a mirror, the controversial diet book, and a set of scales permanently set at 110 pounds (approx. 50kg), which caused further backlash (Ford). Barbie’s early careers were those either acceptable or accessible to women of the era, such as the Fashion Designer Barbie (1960), Flight Attendant Barbie (1961), and Nurse Barbie (1962). However, in 1965 Barbie went into space, two years after cosmonaut Valentina Tereshkova became the first woman in space, and four years before the American moon landing. Barbie’s career stagnated in the 1970s, and she spends the decade being sports Barbie, perhaps as a response to her unpopularity among vocal second wave feminists and reflecting the economic downturn of the era. America’s shift to the right in the 1980s saw in the introduction of the Yuppie, the young urban professional who lived in the city, had a high-powered career, and was consumption-driven. More women were entering the workforce than ever before. Barbie also entered the workforce, spending less time doing the passive leisure of her earlier self (Ford). It also signals the beginning of neoliberalism in America, and a shift to individualism and the rise of the free market ethos. In 1985, Day-to-Night Barbie was sold as the first CEO Barbie who “could go from running the boardroom in her pink power suit to a fun night out on the town”. For Mattel she “celebrated the workplace evolution of the era and showed girls they could have it all”. But despite Barbie’s early careers, the focus was on her "emphasized femininity”, meaning that while she was now a career woman, her appearance and demeanor did not reflect her job. Astronaut Barbie (1985) is a good example of Barbie’s ‘emphasised femininity’ in how career Barbies were designed and dressed. Astronaut Barbie is clearly reflecting the fashion and culture trends of the 1980s by going into space in a “shiny, hot pink spacesuit”, comes with a second space outfit, a shiny “peplum miniskirt worn over silver leggings and knee-high pink boots” (Bertschi), and her hair is too big to fit into the helmet. A dark-skinned US Astronaut Barbie was released in 1994, which coincided with the start of the Shuttle-Mir Program, a collaboration between the US and Russia which between 1994 and 1998 would see seven American astronauts spend almost 1,000 days living in orbit with Russian cosmonauts on the Mir space station. Throughout the 1990s, Barbie increasingly takes on careers more typically considered to be male careers. But again, her femininity in design, dressing and packaging takes precedence over her career. Police Officer Barbie (1993), for example, has no gun or handcuffs. Instead, she comes with a "glittery evening dress" to wear to the awards dance where she will get the "Best Police Officer Award for her courageous acts in the community”. Police Office Barbie is pictured on the box "lov[ing] to teach safety tips to children". Barbie thus “feminizes, even maternalises, law enforcement” (Rogers 14). In 1992, Teen Talk Barbie was released. She had a voice box programmed to speak four distinct phrases out of a possible 270. She sold for US$25, and Mattel produced 350,000, expecting its popularity. The phrases included ‘I Love Shopping’ and ‘Math class is tough’. The phrase ‘Math class is tough’ was seen by many as reinforcing harmful stereotypes about girls and math. The National Council of American Teachers of Maths objected, as did the American Association of University Women (NYT 1992). In response to criticisms of the gendered representations of Barbie’s careers, Mattel have more recently featured Barbie in science and technology fields including Paleontologist Barbie (1996 and 2012), Computer Engineer Barbie (2010), Robotics Engineer Barbie (2018), Astrophysicist Barbie (2019), Wildlife Conservationist Barbie, Entomologist Barbie (2019), and Polar Marine Biologist Barbie (all in collaboration with National Geographic), Robotics Engineer Barbie (2018), Zoologist Barbie (2021), and Renewable Energy Barbie (2022), which go some way to providing representations that at least encompass the ideal that ‘Girls Can Do Anything’. Barbie over her lifetime has also taken on swimming, track and field, and has been a gymnast. Barbie was an Olympic gold medallist in the 1970s, with Mattel releasing four Barbie Olympians between 1975 and 1976, arguably cashing in on the 1976 Montreal Olympics. Gold Medal Barbie Doll Skier was dressed in a red, white, and blue ski suit completed with her gold medal. Gold Medal Barbie Doll is an Olympic swimmer wearing a red, white, and blue tricot swimsuit, and again wears an Olympic gold medal around her neck. The doll was also produced as a Canadian Olympian wearing a red and white swimsuit. Gold Medal Barbie Skater looks like Barbie Malibu and is dressed in a long-sleeved, pleated dress in red, white, and blue. The outfit included white ice skates and her gold medal. Mattel also made a Gold Medal P.J. Gymnast Doll who vaulted and somersaulted in a leotard of red, white, and blue tricot. She had a warm-up jacket with white sleeves, red cuffs, white slippers, and a gold medal. Mattel, as part of a licencing agreement with the International Olympic Committee, produced a range of toys for the 2020 Tokyo Olympics. The collection of five Barbies represented the new sports added to the 2020 Olympics: baseball and softball, sport climbing, karate, skateboarding, and surfing. Each Barbie was dressed in a sport-specific uniform and had a gold medal. Barbie Olympic Games Tokyo 2020 Surfer, for example, was dressed in a pink wetsuit top, with an orange surfboard and a Tokyo 2020 jacket. For the 2022 Winter Olympics and Paralympics, Mattel released a new collection of Barbie dolls featuring among others a para-skiing Barbie who sits on adaptive skis and comes with a championship medal (Douglas). As part of Mattel’s 2023 Barbie Career of the Year doll, the Women in Sports Barbie range shows Barbie in leadership roles in the sports industry, as manager, coach, referee, and sport reporter. General Manager Barbie wears a blue-and-white pinstripe suit accessorised with her staff pass and a smartphone. Coach Barbie has a pink megaphone, playbook, and wears a two-piece pink jacket and athletic shorts. Referee Barbie wears a headset and has a whistle. Sports Reporter Barbie wears a purple, geometric-patterned dress and carries a pink tablet and microphone (Jones). Political Barbie Barbie has run for president in every election year since 1992. The first President Barbie came with an American-themed dress for an inaugural ball and a red suit for her duties in the Oval Office. In 2016, Barbie released an all-female presidential ticket campaign set with a president and vice-president doll. The 2000 President Barbie doll wore a blue pantsuit and featured a short bob cut, red lipstick pearl necklace, and a red gown to change into, “presumably for President Barbie’s inaugural ball” (Lafond). This followed the introduction of UNICEF Ambassador Barbie in 1989. She is packaged as a member of the United States Committee for UNICEF (United Nations International Children’s Emergency Fund), which is mandated to provide humanitarian and development aid to children worldwide. Rather problematically, and again with a focus on her femininity rather than the importance of the organisation she represents, she wears a glittery white and blue full length ball gown with star patterning and a red sash. While some proceeds did go to the US Committee for UNICEF, the dressing and packaging featuring an American flag overshadows the career and its philanthropic message. The period signalled the end of the Cold War and was also the year the United States invaded Panama, resulting in a humanitarian disaster when US military forces attacked urban areas in order to overthrow the Noriega administration. Military Barbie Barbie has served in every US military branch (Sicard). Barbie joined the US army in 1989, wearing a female officer’s evening uniform, though with no sense of what she did. While it may be thought Barbie would increase female in interest in a military career, at the time more women were already enlisting that in any other period from the early 1970s to 2012 (Stillwell). Barbie rejoined the army for the 1990-1991 Gulf War, wearing a Desert Combat Uniform and the 101st Airborne "Screaming Eagle" patch, and serving as a medic. Barbie also joined the Air Force in 1990, three years before Jeannie Leavitt became the first female Air Force fighter pilot. Barbie wore a green flight suit and leather jacket, and gold-trimmed flight cap. She was a fighter pilot and in 1994, she joined the USAF aerial demonstration team, The Thunderbirds. Busy in the 1990s, she also enlisted in the US Navy wearing women's Navy whites. Marine Corps Barbie appeared in 1992, wearing service and conduct medals (Stillwell). All of Barbie’s uniforms were approved by the Pentagon (Military Women’s Memorial). The 2000 Paratrooper Barbie Special Edition was released with the packaging declaring “let’s make a support drop with first aid and food boxes”. She was dressed in undefined military attire which includes a helmet, dog tags, parachute, boots, and hairbrush. Barbie’s Influence In 2014, Barbie became a social media influencer with the launch of the @barbiestyle Instagram account, and in 2015, Barbie launched a vlog on YouTube to talk directly to girls about issues they face. The animated series features Barbie discussing a range of topics including depression, bullying, the health benefits of meditation, and how girls have a habit of apologising when they don’t have anything to be sorry about. The Official @Barbie YouTube channel has over eleven million global subscribers and 23 billion minutes of content watched, making Barbie the #1 girls’ brand on YouTube. Barbie apps average more than 7 million monthly active users and the Instagram count boasts over 2 million followers. The 2023 Barbie film really does attest to Barbie’s influence 70 years after her debut. Barbie, as this article has shown, is more than an influencer and more than a doll, if she ever really was only a doll. She is a popular culture icon, regardless of whether we love her or not. Barbie has sometimes been ahead of the game, and sometimes has been problematically represented, but she has always been influential. Her body, race, ability, careers, independence, and political aspirations have spoken different things to those who play with her. She is fiercely defended, strongly criticised, and shirks from neither. She is also liberating, empowering, straight, and queer. As the articles in this issue reflect, Barbie, it seems, really can be anything. Imagining and Interrogating Barbie in Popular Culture The feature article in this issue outlines how Australian Barbie fans in the 1960s expressed their creativity through the designing and making of their own wardrobes for the doll. Through examining articles from the Australian Women’s Weekly, Donna Lee Brien reveals this rich cultural engagement that was partly driven by thrift, and mostly by enjoyment. Eva Boesenberg examines the social and environmental effects of a plastic doll that is positioned as an ecological ambassador. While there is no doubt that climate change is one of our most pressing social issues, Boesenberg questions the motivations behind Barbie’s eco-crusade: is she an apt role-model to teach children the importance of environmental issues, or is this just a case of corporate greenwashing? Emma Caroll Hudson shifts the focus to entertainment, with an exploration of the marketing of the 2023 blockbuster film Barbie. Here she argues that the marketing campaign was highly successful, utilising a multi-faceted approach centred on fan participation. She highlights key components of the campaign to reveal valuable insights into how marketing can foster a cultural phenomenon. Revna Altiok’s article zooms in on the depiction of Ken in the 2023 film, revealing his characterisation to be that of a ‘manic pixie dream boy’ whose lack of identity propels him on a journey to self-discovery. This positioning, argues Altiok, pulls into focus social questions around gender dynamics and how progress can be truly achieved. Rachel Wang turns the spotlight to Asian identity within the Barbie world, revealing how from early iterations a vague ‘Oriental’ Barbie was accompanied by cultural stereotyping. Despite later, more nuanced interpretations of country-specific Asian dolls, problematic features remained embedded. This, Wang argues, positions Asian Barbies as the racial ‘other’. Kaela Joseph, Tanya Cook, and Alena Karkanias’s article examines how the 2023 Barbie film reflects different forms of fandom. Firstly, Joseph interrogates how the Kens’ patriarchal identity is expressed through acts of collective affirmational fandom. Here, individual fans legitimise their positions within the group by mastering and demonstrating their knowledge of popular culture phenomena. Joseph contrasts this with transformational fandom, which is based upon reimagining the source material to create new forms. The transformation of the titular character of the Barbie movie forms the basis of Eli S’s analysis. S examines how the metaphor of ‘unboxing’ the doll provides an avenue through which to understand Barbie’s metamorphosis from constrained doll to aware human as she journeys from the pink plastic Barbie Land to the Real World. Anna Temel turns her critical gaze to how the 2023 film attempts to reposition Barbie’s image away from gender stereotypes to a symbol of feminist empowerment. Director Greta Gerwig, Temel argues, critiques the ‘ideal woman’ and positions Barbie as a vehicle through which contemporary feminism and womanhood can be interrogated. Temel finds that this is not always successfully articulated in the depiction of Barbie in the film. The reading of the Barbie movie’s Barbie Land as an Asexual Utopia is the focus of Anna Maria Broussard’s article. Here Broussard draws the focus to the harmonious community of dolls who live without social expectations of sexuality. Barbie provides a popular culture reflection of the Asexual experience, expressed through Barbie’s rejection of a heteronormative relationship both in Barbie Land and the Real World. Completing this collection is Daisy McManaman’s article interrogating the multiple iterations of the doll’s embodied femininity. Incorporating an ethnographic study of the author’s relationship with the doll, McManaman uncovers that Barbie serves as a site of queer joy and a role model through which to enjoy and explore femininity and gender. These articles have been both intellectually stimulating to edit, and a joy. We hope you enjoy this collection that brings a new academic lens to the popular cultural phenomenon that is Barbie. References Aguirre, Abby. “Barbiemania! Margot Robbie Opens Up about the Movie Everyone’s Waiting For.” Vogue, 24 May 2023. 16 Mar. 2024 <https://www.vogue.com/article/margot-robbie-barbie-summer-cover-2023-interview>. Bertschi, Jenna. “Barbie: An Astronaut for the Ages.” Smithsonian National Air and Space Museum, 18 Jul. 2023. 11 Mar. 2024 <https://airandspace.si.edu/stories/editorial/barbie-astronaut-ages>. Blackmore, Erin. “Barbie’s Secret Sister Was a German Novelty Doll.” History.com, 14 Jul. 2023. 11 mar. 2024 <https://www.history.com/news/barbie-inspiration-bild-lilli>. 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Jones, Alexis. “Barbie's New 'Women in Sports' Dolls Are a Major Win For Athletes and Fans.” Popsugar, 9 Aug. 2023. 17 Mar. 2024 <https://www.popsugar.com/family/mattel-women-in-sports-barbie-49268194>. Lafond, Hannah. “How Barbies Have Changed over the Years.” The List, 7 Jul. 2023. 16 Mar. 2024 <https://www.thelist.com/1333916/barbies-changed-over-the-years/>. Lopez, Sandra. “10 Barbie Dolls Inspired by Real-Life Iconic Latinas.” Remezcla, 19 Jul. 2023. 20 Mar. 2024 <https://remezcla.com/lists/culture/barbie-dolls-inspired-by-real-life-iconic-latinas/>. Military Women’s Memorial. “Barbie Enlists.” 15 Mar. 2024 <https://womensmemorial.org/curators-corner/barbie-enlists/>. Moore, Hannah. “Why Warhol Painted Barbie.” BBC, 1 Oct. 2015. 15 Mar. 2024 <https://www.bbc.com/news/magazine-34407991>. Mowbray, Nicole. “Dressing Barbie: Meet the Designer Who Created a Miniature Fashion Icon.” CNN, 14 Jul. 2023. 17 Mar. 2024 <https://edition.cnn.com/style/dressing-barbie-iconic-fashion-looks>. 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IntroductionSupermarkets are functionally challenging environments for people with vision impairments. A supermarket is likely to house an average of 45,000 products in a median floor-space of 4,529 square meters and many visually impaired people are unable to shop without assistance, which greatly impedes personal independence (Nicholson et al.). The task of selecting goods in a supermarket is an “activity that is expressive of agency, identity and creativity” (Sutherland) from which many vision-impaired persons are excluded. In response to this, a number of proof of concept (demonstrating feasibility) and prototype assistive technologies are being developed which aim to use smart phones as potential sensorial aides for vision impaired persons. In this paper, I discuss two such prototypic technologies, Shop Talk and BlindShopping. I engage with this issue’s list theme by suggesting that, on the one hand, list making is a uniquely human activity that demonstrates our need for order, reliance on memory, reveals our idiosyncrasies, and provides insights into our private lives (Keaggy 12). On the other hand, lists feature in the creation of spatial inventories that represent physical environments (Perec 3-4, 9-10). The use of lists in the architecture of assistive technologies for shopping illuminates the interaction between these two modalities of list use where items contained in a list are not only textual but also cartographic elements that link the material and immaterial in space and time (Haber 63). I argue that despite the emancipatory potential of assistive shopping technologies, their efficacy in practical situations is highly dependent on the extent to which they can integrate a number of lists to produce representations of space that are meaningful for vision impaired users. I suggest that the extent to which these prototypes may translate to becoming commercially viable, widely adopted technologies is heavily reliant upon commercial and institutional infrastructures, data sources, and regulation. Thus, their design, manufacture and adoption-potential are shaped by the extent to which certain data inventories are accessible and made interoperable. To overcome such constraints, it is important to better understand the “spatial syntax” associated with the shopping task for a vision impaired person; that is, the connected ordering of real and virtual spatial elements that result in a supermarket as a knowable space within which an assisted “spatial practice” of shopping can occur (Kellerman 148, Lefebvre 16).In what follows, I use the concept of lists to discuss the production of supermarket-space in relation to the enabling and disabling potentials of assistive technologies. First, I discuss mobile digital technologies relative to disability and impairment and describe how the shopping task produces a disabling spatial practice. Second, I present a case study showing how assistive technologies function in aiding vision impaired users in completing the task of supermarket shopping. Third, I discuss various factors that may inhibit the liberating potential of technology assisted shopping by vision-impaired people. Addressing Shopping as a Disabling Spatial Practice Consider how a shopping list might inform one’s experience of supermarket space. The way shopping lists are written demonstrate the variability in the logic that governs list writing. As Bill Keaggy demonstrates in his found shopping list Web project and subsequent book, Milk, Eggs, Vodka, a shopping list may be written on a variety of materials, be arranged in a number of orientations, and the writer may use differing textual attributes, such as size or underlining to show emphasis. The writer may use longhand, abbreviate, write neatly, scribble, and use an array of alternate spelling and naming conventions. For example, items may be listed based on knowledge of the location of products, they may be arranged on a list as a result of an inventory of a pantry or fridge, or they may be copied in the order they appear in a recipe. Whilst shopping, some may follow strictly the order of their list, crossing back and forth between aisles. Some may work through their list item-by-item, perhaps forward scanning to achieve greater economies of time and space. As a person shops, their memory may be stimulated by visual cues reminding them of products they need that may not be included on their list. For the vision impaired, this task is near impossible to complete without the assistance of a relative, friend, agency volunteer, or store employee. Such forms of assistance are often unsatisfactory, as delays may be caused due to the unavailability of an assistant, or the assistant having limited literacy, knowledge, or patience to adequately meet the shopper’s needs. Home delivery services, though readily available, impede personal independence (Nicholson et al.). Katie Ellis and Mike Kent argue that “an impairment becomes a disability due to the impact of prevailing ableist social structures” (3). It can be said, then, that supermarkets function as a disability producing space for the vision impaired shopper. For the vision impaired, a supermarket is a “hegemonic modern visual infrastructure” where, for example, merchandisers may reposition items regularly to induce customers to explore areas of the shop that they wouldn’t usually, a move which adds to the difficulty faced by those customers with impaired vision who work on the assumption that items remain as they usually are (Schillmeier 161).In addressing this issue, much emphasis has been placed on the potential of mobile communications technologies in affording vision impaired users greater mobility and flexibility (Jolley 27). However, as Gerard Goggin argues, the adoption of mobile communication technologies has not necessarily “gone hand in hand with new personal and collective possibilities” given the limited access to standard features, even if the device is text-to-speech enabled (98). Issues with Digital Rights Management (DRM) limit the way a device accesses and reproduces information, and confusion over whether audio rights are needed to convert text-to-speech, impede the accessibility of mobile communications technologies for vision impaired users (Ellis and Kent 136). Accessibility and functionality issues like these arise out of the needs, desires, and expectations of the visually impaired as a user group being considered as an afterthought as opposed to a significant factor in the early phases of design and prototyping (Goggin 89). Thus, the development of assistive technologies for the vision impaired has been left to third parties who must adopt their solutions to fit within certain technical parameters. It is valuable to consider what is involved in the task of shopping in order to appreciate the considerations that must be made in the design of shopping intended assistive technologies. Shopping generally consists of five sub-tasks: travelling to the store; finding items in-store; paying for and bagging items at the register; exiting the store and getting home; and, the often overlooked task of putting items away once at home. In this process supermarkets exhibit a “trichotomous spatial ontology” consisting of locomotor space that a shopper moves around the store, haptic space in the immediate vicinity of the shopper, and search space where individual products are located (Nicholson et al.). In completing these tasks, a shopper will constantly be moving through and switching between all three of these spaces. In the next section I examine how assistive technologies function in producing supermarkets as both enabling and disabling spaces for the vision impaired. Assistive Technologies for Vision Impaired ShoppersJason Farman (43) and Adriana de Douza e Silva both argue that in many ways spaces have always acted as information interfaces where data of all types can reside. Global Positioning System (GPS), Radio Frequency Identification (RFID), and Quick Response (QR) codes all allow for practically every spatial encounter to be an encounter with information. Site-specific and location-aware technologies address the desire for meaningful representations of space for use in everyday situations by the vision impaired. Further, the possibility of an “always-on” connection to spatial information via a mobile phone with WiFi or 3G connections transforms spatial experience by “enfolding remote [and latent] contexts inside the present context” (de Souza e Silva). A range of GPS navigation systems adapted for vision-impaired users are currently on the market. Typically, these systems convert GPS information into text-to-speech instructions and are either standalone devices, such as the Trekker Breeze, or they use the compass, accelerometer, and 3G or WiFi functions found on most smart phones, such as Loadstone. Whilst both these products are adequate in guiding a vision-impaired user from their home to a supermarket, there are significant differences in their interfaces and data architectures. Trekker Breeze is a standalone hardware device that produces talking menus, maps, and GPS information. While its navigation functionality relies on a worldwide radio-navigation system that uses a constellation of 24 satellites to triangulate one’s position (May and LaPierre 263-64), its map and text-to-speech functionality relies on data on a DVD provided with the unit. Loadstone is an open source software system for Nokia devices that has been developed within the vision-impaired community. Loadstone is built on GNU General Public License (GPL) software and is developed from private and user based funding; this overcomes the issue of Trekker Breeze’s reliance on trading policies and pricing models of the few global vendors of satellite navigation data. Both products have significant shortcomings if viewed in the broader context of the five sub-tasks involved in shopping described above. Trekker Breeze and Loadstone require that additional devices be connected to it. In the case of Trekker Breeze it is a tactile keypad, and with Loadstone it is an aftermarket screen reader. To function optimally, Trekker Breeze requires that routes be pre-recorded and, according to a review conducted by the American Foundation for the Blind, it requires a 30-minute warm up time to properly orient itself. Both Trekker Breeze and Loadstone allow users to create and share Points of Interest (POI) databases showing the location of various places along a given route. Non-standard or duplicated user generated content in POI databases may, however, have a negative effect on usability (Ellis and Kent 2). Furthermore, GPS-based navigation systems are accurate to approximately ten metres, which means that users must rely on their own mobility skills when they are required to change direction or stop for traffic. This issue with GPS accuracy is more pronounced when a vision-impaired user is approaching a supermarket where they are likely to encounter environmental hazards with greater frequency and both pedestrian and vehicular traffic in greater density. Here the relations between space defined and spaces poorly defined or undefined by the GPS device interact to produce the supermarket surrounds as a disabling space (Galloway). Prototype Systems for Supermarket Navigation and Product SelectionIn the discussion to follow, I look at two prototype systems using QR codes and RFID that are designed to be used in-store by vision-impaired shoppers. Shop Talk is a proof of concept system developed by researchers at Utah State University that uses synthetic verbal route directions to assist vision impaired shoppers with supermarket navigation, product search, and selection (Nicholson et al.). Its hardware consists of a portable computational unit, a numeric keypad, a wireless barcode scanner and base station, headphones for the user to receive the synthetic speech instructions, a USB hub to connect all the components, and a backpack to carry them (with the exception of the barcode scanner) which has been slightly modified with a plastic stabiliser to assist in correct positioning. Shop Talk represents the supermarket environment using two data structures. The first is comprised of two elements: a topological map of locomotor space that allows for directional labels of “left,” “right,” and “forward,” to be added to the supermarket floor plan; and, for navigation of haptic space, the supermarket inventory management system, which is used to create verbal descriptions of product information. The second data structure is a Barcode Connectivity Matrix (BCM), which associates each shelf barcode with several pieces of information such as aisle, aisle side, section, shelf, position, Universal Product Code (UPC) barcode, product description, and price. Nicholson et al. suggest that one of their “most immediate objectives for future work is to migrate the system to a more conventional mobile platform” such as a smart phone (see Mobile Shopping). The Personalisable Interactions with Resources on AMI-Enabled Mobile Dynamic Environments (PRIAmIDE) research group at the University of Deusto is also approaching Ambient Assisted Living (AAL) by exploring the smart phone’s sensing, communication, computing, and storage potential. As part of their work, the prototype system, BlindShopping, was developed to address the issue of assisted shopping using entirely off-the-shelf technology with minimal environmental adjustments to navigate the store and search, browse and select products (López-de-Ipiña et al. 34). Blind Shopping’s architecture is based on three components. Firstly, a navigation system provides the user with synthetic verbal instructions to users via headphones connected to the smart phone device being used in order to guide them around the store. This requires a RFID reader to be attached to the tip of the user’s white cane and road-marking-like RFID tag lines to be distributed throughout the aisles. A smartphone application processes the RFID data that is received by the smart phone via Bluetooth generating the verbal navigation commands as a result. Products are recognised by pointing a QR code reader enabled smart phone at an embossed code located on a shelf. The system is managed by a Rich Internet Application (RIA) interface, which operates by Web browser, and is used to register the RFID tags situated in the aisles and the QR codes located on shelves (López-de-Ipiña and 37-38). A typical use-scenario for Blind Shopping involves a user activating the system by tracing an “L” on the screen or issuing the “Location” voice command, which activates the supermarket navigation system which then asks the user to either touch an RFID floor marking with their cane or scan a QR code on a nearby shelf to orient the system. The application then asks the user to dictate the product or category of product that they wish to locate. The smart phone maintains a continuous Bluetooth connection with the RFID reader to keep track of user location at all times. By drawing a “P” or issuing the “Product” voice command, a user can switch the device into product recognition mode where the smart phone camera is pointed at an embossed QR code on a shelf to retrieve information about a product such as manufacturer, name, weight, and price, via synthetic speech (López-de-Ipiña et al. 38-39). Despite both systems aiming to operate with as little environmental adjustment as possible, as well as minimise the extent to which a supermarket would need to allocate infrastructural, administrative, and human resources to implementing assistive technologies for vision impaired shoppers, there will undoubtedly be significant establishment and maintenance costs associated with the adoption of production versions of systems resembling either prototype described in this paper. As both systems rely on data obtained from a server by invoking Web services, supermarkets would need to provide in-store WiFi. Further, both systems’ dependence on store inventory data would mean that commercial versions of either of these systems are likely to be supermarket specific or exclusive given that there will be policies in place that forbid access to inventory systems, which contain pricing information to third parties. Secondly, an assumption in the design of both prototypes is that the shopping task ends with the user arriving at home; this overlooks the important task of being able to recognise products in order to put them away or to use at a later time.The BCM and QR product recognition components of both respective prototypic systems associates information to products in order to assist users in the product search and selection sub-tasks. However, information such as use-by dates, discount offers, country of manufacture, country of manufacturer’s origin, nutritional information, and the labelling of products as Halal, Kosher, containing alcohol, nuts, gluten, lactose, phenylalanine, and so on, create further challenges in how different data sources are managed within the devices’ software architecture. The reliance of both systems on existing smartphone technology is also problematic. Changes in the production and uptake of mobile communication devices, and the software that they operate on, occurs rapidly. Once the fit-out of a retail space with the necessary instrumentation in order to accommodate a particular system has occurred, this system is unlikely to be able to cater to the requirement for frequent upgrades, as built environments are less flexible in the upgrading of their technological infrastructure (Kellerman 148). This sets up a scenario where the supermarket may persist as a disabling space due to a gap between the functional capacities of applications designed for mobile communication devices and the environments in which they are to be used. Lists and Disabling Spatial PracticeThe development and provision of access to assistive technologies and the data they rely upon is a commercial issue (Ellis and Kent 7). The use of assistive technologies in supermarket-spaces that rely on the inter-functional coordination of multiple inventories may have the unintended effect of excluding people with disabilities from access to legitimate content (Ellis and Kent 7). With de Certeau, we can ask of supermarket-space “What spatial practices correspond, in the area where discipline is manipulated, to these apparatuses that produce a disciplinary space?" (96).In designing assistive technologies, such as those discussed in this paper, developers must strive to achieve integration across multiple data inventories. Software architectures must be optimised to overcome issues relating to intellectual property, cross platform access, standardisation, fidelity, potential duplication, and mass-storage. This need for “cross sectioning,” however, “merely adds to the muddle” (Lefebvre 8). This is a predicament that only intensifies as space and objects in space become increasingly “representable” (Galloway), and as the impetus for the project of spatial politics for the vision impaired moves beyond representation to centre on access and meaning-making.ConclusionSupermarkets act as sites of hegemony, resistance, difference, and transformation, where the vision impaired and their allies resist the “repressive socialization of impaired bodies” through their own social movements relating to environmental accessibility and the technology assisted spatial practice of shopping (Gleeson 129). It is undeniable that the prototype technologies described in this paper, and those like it, indeed do have a great deal of emancipatory potential. However, it should be understood that these devices produce representations of supermarket-space as a simulation within a framework that attempts to mimic the real, and these representations are pre-determined by the industrial, technological, and regulatory forces that govern their production (Lefebvre 8). Thus, the potential of assistive technologies is dependent upon a range of constraints relating to data accessibility, and the interaction of various kinds of lists across the geographic area that surrounds the supermarket, locomotor, haptic, and search spaces of the supermarket, the home-space, and the internal spaces of a shopper’s imaginary. These interactions are important in contributing to the reproduction of disability in supermarkets through the use of assistive shopping technologies. The ways by which people make and read shopping lists complicate the relations between supermarket-space as location data and product inventories versus that which is intuited and experienced by a shopper (Sutherland). Not only should we be creating inventories of supermarket locomotor, haptic, and search spaces, the attention of developers working in this area of assistive technologies should look beyond the challenges of spatial representation and move towards a focus on issues of interoperability and expanded access of spatial inventory databases and data within and beyond supermarket-space.ReferencesDe Certeau, Michel. The Practice of Everyday Life. Berkeley: University of California Press, 1984. Print.De Souza e Silva, A. “From Cyber to Hybrid: Mobile Technologies As Interfaces of Hybrid Spaces.” Space and Culture 9.3 (2006): 261-78.Ellis, Katie, and Mike Kent. Disability and New Media. New York: Routledge, 2011.Farman, Jason. 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