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"Wireless communication systems Philosophy."
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Wirelessness
How has wirelessness--being connected to objects and infrastructures without knowing exactly how or where-- become a key form of contemporary experience? Stretching across routers, smart phones, netbooks, cities, towers, Guangzhou workshops, service agreements, toys, and states, wireless technologies have brought with them sensations of change, proximity, movement, and divergence. In Wirelessness, Adrian Mackenzie draws on philosophical techniques from a century ago to make sense of this most contemporary postnetwork condition. The radical empiricism associated with the pragmatist philosopher William James, Mackenzie argues, offers fresh ways for matching the disordered flow of wireless networks, meshes, patches, and connections with felt sensations. For Mackenzie, entanglements with things, gadgets, infrastructures, and services--tendencies, fleeting nuances, and peripheral shades of often barely registered feeling that cannot be easily codified, symbolized, or quantified--mark the experience of wirelessness, and this links directly to James's expanded conception of experience. \"Wirelessness\" designates a tendency to make network connections in different times and places using these devices and services. Equally, it embodies a sensibility attuned to the proliferation of devices and services that carry information through radio signals. Above all, it means heightened awareness of ongoing change and movement associated with networks, infrastructures, location, and information.The experience of wirelessness spans several strands of media-technological change, and Mackenzie moves from wireless cities through signals, devices, networks, maps, and products, to the global belief in the expansion of wireless worlds.
eBook
Research on Interbank Offered Rate Based on Embedded Wireless Communication
With the Wi-Fi (Wireless Fidelity) standard and the increase of wireless access points, wireless data communication based on 802.11 has become increasingly popular. Interest rate risk is a kind of financial risk. In essence, interest rate risk is caused by changes in the price or income of financial products caused by changes in interest rates. As the hot spot of the wireless network, the self-organizing network will inevitably become a development trend to realize voice communication on its market-oriented core interest rate; the ARIMA model is further proposed to improve the prediction accuracy and better fit the daily fluctuation of the Shibor overnight. The monthly average value of Shibor is predicted overnight, and monthly mean prediction of Shibor is overnight. Finally, the overnight Shibor decision-making system is established, and the forecasting model is integrated to guide the participants in the money market.
Journal Article
GPS-Based Network Synchronization of Wireless Sensors for Extracting Propagation of Disturbance on Structural Systems
Wireless sensor networks (WSNs) have gained a positive popularity for structural health monitoring (SHM) applications. The underlying reason for using WSNs is the vast number of devices supporting wireless networks available these days. However, some of these devices are expensive. The main objective of this paper is to develop a cost-effective WSN based on low power consumption and long-range radios, which can perform real-time, real-scale acceleration data analyses. Since a detection system for vibration propagation is proposed in this paper, the synchronized monitoring of acceleration data is necessary. To meet this need, a Pulse Per Second (PPS) synchronization method is proposed with the help of GPS (Global Positioning System) receivers, representing an addition to the synchronization method based on real-time clock (RTC). As a result, RTC+PPS is the term used when referring to this method in this paper. In summary, the experiments presented in this research consist in performing specific and synchronized measurements on a full-scale steel I-beam. Finally, it is possible to perform measurements with a synchronization success of 100% in a total of 30 samples, thereby obtaining the propagation of vibrations in the structure under consideration by implementing the RTS+PPS method.
Journal Article
Increasing Energy Efficiency in Wireless Sensor Networks Using GA-ANFIS to Choose a Cluster Head and Assess Routing and Weighted Trusts to Demodulate Attacker Nodes
Demodulating harmful nodes and diminishing the energy waste in sensor nodes can prolong the lifespan of wireless sensor networks (WSNs). In this study, a genetic algorithm (GA) and an adaptive neuro fuzzy inference system were used to diminish the energy waste of sensors. Weighted trust evaluation was applied to search for harmful nodes in the network to prolong the lifespan of WSNs. A low-energy adaptive clustering hierarchy method was used to analyze the results. It was discovered that searching for harmful nodes with GA-ANFIS using weighted trust evaluation significantly increased the lifespan of WSNs. For evaluation of the proposed method we used the mean of energy of all sensors against of the round, data packets received in base station, minimum energy versus rounds and number of alive sensors versus rounds. Also, in this paper we compared the proposed method results with LEACH, LEACH-DT, Random, SIF and GA-Fuzzy methods. As results the proposed method has high life time than other methods. A representation of the overall system was implemented using MATLAB software.
Journal Article
Debating New Media: Rewriting Communications History
Many historians, journalists, and media mavens have traced the genealogy of Victorian communications networks backward, beginning with radio after World War I and continuing with personal computing in the 1980s and ending with the internet today. This impulse has accelerated with the rise of electronic commerce, social media, and virtual reality. This essay proposes a different agenda. Drawing on recent historical writing on mythmaking, materiality, and political economy and illustrated with case studies from Europe, North America, Asia, and North Africa, it reenvisions the history of new media by telling the story of Victorian communications networks in relation to the issues of their day, not ours. The essay spans five networks in the period between 1830 and 1914: the landline telegraph, the undersea cable, the telephone, the wireless telegraph, and the mail.
Journal Article
An efficient combinational approach for PAPR reduction in MIMO–OFDM system
The multiple input multiple output (MIMO) with orthogonal frequency division multiplexing (OFDM) has emerged as a promising solution to enhance the channel capacity and diversity of wireless communication system without any increase in bandwidth. In this paper, a parallel combinational scheme is proposed to reduce peak-to-average power ratio (PAPR) in MIMO–OFDM system under Rayleigh fading environment. The proposed method intelligently incorporates both active gradient project and partial transmit sequence schemes. The results show that the proposed method not only reduces the PAPR and computational complexity of the system but also maintains the bit error rate compared to other schemes.
Journal Article
Surveillance in ubiquitous network societies: normative conflicts related to the consumer in-store supermarket experience in the context of the Internet of Things
The Internet of Things (IoT) is an emerging global infrastructure that employs wireless sensors to collect, store, and exchange data. Increasingly, applications for marketing and advertising have been articulated as a means to enhance the consumer shopping experience, in addition to improving efficiency. However, privacy advocates have challenged the mass aggregation of personally-identifiable information in databases and geotracking, the use of location-based services to identify one’s precise location over time. This paper employs the framework of contextual integrity related to privacy developed by Nissenbaum (Privacy in context: technology, policy, and the integrity of social life. Stanford University Press, Stanford,
2010
) as a tool to understand citizen response to implementation IoT-related technology in the supermarket. The purpose of the study was to identify and understand specific changes in information practices brought about by the IoT that may be perceived as privacy violations. Citizens were interviewed, read a scenario of near-term IoT implementation, and were asked to reflect on changes in the key actors involved, information attributes, and principles of transmission. Areas where new practices may occur with the IoT were then highlighted as potential problems (privacy violations). Issues identified included the mining of medical data, invasive targeted advertising, and loss of autonomy through marketing profiles or personal affect monitoring. While there were numerous aspects deemed desirable by the participants, some developments appeared to tip the balance between consumer benefit and corporate gain. This surveillance power creates an imbalance between the consumer and the corporation that may also impact individual autonomy. The ethical dimensions of this problem are discussed.
Journal Article
Design and implementation of a mobile health electronic data capture platform that functions in fully-disconnected settings: a pilot study in rural Liberia
Background
Mobile phones and personal digital assistants have been used for data collection in developing world settings for over three decades, and have become increasingly common. However, the use of electronic data capture (EDC) through mobile phones is limited in many areas by inconsistent network connectivity and poor access to electricity, which thwart data transmission and device usage. This is the case in rural Liberia, where many health workers live and work in areas without any access to cellular connectivity or reliable power. Many existing EDC mobile software tools are built for occasionally-disconnected settings, allowing a user to collect data while out of range of a cell tower and transmit data to a central server when he/she regains a network connection. However, few tools exist that can be used indefinitely in fully-disconnected settings, where a user will never have access to the internet or a cell network. This led us to create and implement an EDC software tool that allows for completely offline data transfer and application updating.
Results
We designed, pilot-tested, and scaled an open-source fork of Open Data Kit Collect (an Android application that can be used to create EDC systems) that allows for offline Bluetooth-based bidirectional data transfer, enabling a system in which permanently-offline users can collect data and receive application updates. We implemented this platform among a cohort of 317 community health workers and 28 supervisors in a remote area of rural Liberia with incomplete cellular connectivity and low access to power sources.
Conclusions
Running a fully-offline EDC program that completely bypasses the cellular network was found to be feasible; the system is still running, over 4 years after the initial pilot program. The users of this program can theoretically collect data offline for months or years, assuming they receive hardware support when needed. Fully-offline EDC has applications in settings where cellular network coverage is poor, as well as in disaster relief settings in which portions of the communications infrastructure may be temporarily nonfunctional.
Journal Article
Thinking in the Cloud: The Cognitive Incorporation of Cloud-Based Technology
Technologies and artefacts have long played a role in the structure of human memory and our cognitive lives more generally. Recent years have seen an explosion in the production and use of a new regime of information technologies that might have powerful implications for our minds. Electronic-Memory (E-Memory), powerful, portable and wearable digital gadgetry and “the cloud” of ever-present data services allow us to record, store and access an ever-expanding range of information both about and of relevance to our lives. Already, for a decade we have been carrying around expansive gadgetry which allows us to collect, store and use what would have been almost unimaginable amounts of digital information only a short time ago. Now, thanks to the wireless internet adding vast processing and storage potential to the powerful portable devices which many of us carry constantly or wear, this information can be accessed and customised in an ever-greater variety of ways. How should we assess the implications of the new portable and pervasive cognitive technologies on offer? Does E-Memory and the wider panoply of cloud-enabled cognitive technologies really promise (as some see it), or threaten (as others do), a radical change to the human cognitive abilities and perhaps the very nature of our minds? If so, how are we to assess the possibilities and attempt to understand whether they offer a hopeful or dangerous turn in the human condition? This investigation is structured around four related factors of the new technology: Totality, Practical Incorporability, Autonomy and Entanglement. We use these factors to inquire into the implications of this cloud-based memory technology for our minds and our sense of self.
Journal Article