Wireless Sensor Network Testbeds

Author(s):  
Khalid El-Darymli ◽  
Mohamed H. Ahmed

The rapid increase in WSN-Testbed deployments alongside intra-academic and inter-industrial collaboration are two healthy signs which not only affirm but also confirm that it is a matter of time before WSN technology becomes a preferred industrial norm. In this chapter, the authors help in realizing this very fact through reflecting on different experiences pertinent to WSN-Testbed deployments. To put this objective into perspective, first, the authors adopt and describe a classification methodology for WSN-Testbeds. Second, the authors present a generic architecture for the different classes of WSN-Testbeds. Third, the authors pinpoint some design challenges and evaluation criteria/benchmarking scheme pertinent to WSN-Testbeds. Fourth, the authors examine the literature and opt for a variety of 30 WSN-Testbeds. The selection of these WSN-Testbeds is carefully made to cover the various spectra of WSN applications while avoiding redundancy. Fifth, selected WSN-Testbeds are comparatively analyzed with highlights of architecture and distinctive features. Sixth, the authors apply the benchmarking scheme and properly evaluate the selected WSN-Testbeds. Then, the authors shed light on some of the most relevant challenges and drawbacks. Finally, interesting discussion is introduced where among the issues discussed are: vitality of WSN-Testbeds, design trade-offs, network model, WSN’s OS, topology control, power management, some real world deployment challenges, and confidentiality infringement. The authors believe that this chapter is a contribution towards realizing the important role that a WSN-Testbed plays in hastening the industrial adoption for the promising WSN technology.

2019 ◽  
Vol 3 (4) ◽  
pp. 72
Author(s):  
Bernhard Maurer ◽  
Verena Fuchsberger

Conventional digital and remote forms of play lack the physicality associated with analog play. Research on the materiality of boardgames has highlighted the inherent material aspects to this analog form of play and how these are relevant for the design of digital play. In this work, we analyze the inherent material qualities and related experiences of boardgames, and speculate how these might shift in remote manifestations. Based on that, we depict three lenses of designing for remote tangible play: physicality, agency, and time. These lenses present leverage points for future designs and illustrate how the digital and the physical can complement each other following alternative notions of hybrid digital–physical play. Based on that, we illustrate the related design space and discuss how boardgame qualities can be translated to the remote space, as well as how their characteristics might change. Thereby, we shed light on related design challenges and reflect on how designing for shared physicality can enrich dislocated play by applying these lenses.


Energies ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2303 ◽  
Author(s):  
Piotr Zientara ◽  
Paulina Bohdanowicz-Godfrey ◽  
Claire Whitely ◽  
Grzegorz Maciejewski

This paper focuses on Hilton’s proprietary sustainability performance measurement system (SPMS) called LightStay (2010–2017). It draws on the case-study method and relies on three principal sources of information: in-house documents, a questionnaire completed by users of LightStay and interviews conducted with external experts. Specifically, the paper traces the system’s evolution and highlights its distinctive features, exploring the challenges and trade-offs related to the design and workings of an SPMS in a hotel multinational. The study shows, among other things, how LightStay, using an internationally approved methodology of data collection, calculation, metrics and benchmarking, compares a hotel’s predicted and actual environmental performance. It concludes by arguing that LightStay is a holistic platform that not only integrates precise measurement of the firm’s environmental effects with its business operations and strategic goals but also acts as a repository of sustainability knowledge and a facilitator of organisational learning. Its value and originality lie in providing unique insights into the workings of a proprietary SPMS at a nonanonymised hotel company.


Author(s):  
Toula Perrea ◽  
Katerina Melfou ◽  
Spiros Mamalis ◽  
Panoraia Papanagiotou

This paper investigates Customer Value (CV) perceptions towards own-country Geographic Indication (GI) food products. CV perceptions are the outcome of the trade-offs between perceived Values and Costs from the purchase or consumption of a product. The objective is to examine if the perceived gains from purchasing of GI foods would exceed any perceived losses and shed light on the exact type of perceived values and costs that define CV for GI foods. Despite doubts in relation to specific search and experience parameters of GI foods that impact on the development of a good consumer-product relationship, it is the positive perceptions about products' quality, likeability and social status that mainly formulate CV. Concerns in relation to GIs' price-availability are too mild, not subtracting much from the overall CV indicating that consumers are driven by more self-centred motives. For market success, GI food producers need to build stronger associations in consumers' mind between GI foods and their altruistic value in terms of the ethical character of their production.


Author(s):  
Noam Gidron

Abstract Mainstream parties in Western Europe are increasingly struggling to hold together their base of support. As a lens for exploring this changing electoral landscape, this article focuses on the growing share of the electorate that is cross-pressured between conservative and progressive attitudes on economic and cultural issues. It argues that a stable asymmetry characterizes Western European mass attitudes: while support for the left is common among voters with progressive attitudes on both issues, it is enough to be conservative on one issue to turn right. Analyzing survey data collected from 1990 to 2017, the study shows that cross-pressures are resolved in favor of the right and examines the trade-offs this poses to center-right parties. These findings contribute to debates on electoral dealignment and realignment and shed light on the electoral choices of the center-right.


2017 ◽  
Vol 38 (1) ◽  
pp. 3-13 ◽  
Author(s):  
Fernando G. Alberti ◽  
Mario A. Varon Garrido

Purpose This paper aims to discuss hybrid organizations whose business models blur the boundary between for-profit and nonprofit worlds. With the aim of understanding how hybrid organizations have developed commercially viable business models to create positive social and environmental change, the authors contend that hybrids are altering long-held business norms and conceptions of the role of the corporation in society. Building on an analysis of the most updated literature on hybrid organizations and with the use of case study approach, the purpose of this paper is to derive managerial lessons that traditional businesses may apply to innovate their business models. Design/methodology/approach This paper has a practical focus to help organizations to develop successful business strategies and design innovative business models. It applies emerging thinking on hybrid business models to provide new insights and ideas on the use of business models as tools for innovating and delivering value. To comply with this, first, the authors discuss the distinctive characteristics of hybrids and the hybrid business model through a concise but comprehensive review of all the literature on hybrid organization, which is still very recent. Second, we relied on a short case study that introduces information technology and digital innovation as the premises of the emergence of a new hybrid business model that adds additional elements to traditional business managers on how to learn from hybrid organizations’ avenues to innovate their business models. Findings In this paper, the authors aimed to shed light on the management of any organization or initiative that aims to embrace multiple and competing yet potentially synergistic goals, as is increasingly the case in modern corporations. Spotting hidden complementarities of antagonistic assets can be arduous, time-consuming, costly and risky, but businesses driven by innovation may want to keep a close eye on the expanding hybrid sector as a source of future entrepreneurial opportunities. To this regard, hybrid social ventures have the potential to shed light on ways to innovate traditional business models. The essence of studying hybrids is that firms may learn how to innovate their business models in ways that go beyond current conceptualizations, making their mission profitable, rather than making profit their only mission! The research design (literature analysis and case study) allowed the authors to disentangle different innovative business models that hybrids suggest highlight strengths and weaknesses of such business models, understand strategies and capabilities associated with hybrids and transpose all these lessons learned to traditional business managers who constantly struggle for innovation. Research limitations/implications The main implication is that hybrid organizations may serve as incubators for new practices that can gain scale and impact by infusion into existing corporations. The authors can assist to a process of “hybridization” of incumbent firms, pushing the boundaries of corporate sustainability efforts toward strategies in which profit and social purpose share more equal footing. Practical implications Firms interested in benefiting from antagonistic assets that can have a dramatic impact on their business model innovation may want to consider some lessons: firms can attempt to build antagonistic assets into their mission, asking themselves what activities they can undertake with the potential to create (or erode) social, environmental and economic value and how these activities might be mediated by the context/environment in which they operate; they can partner with hybrids to benefit from them and absorb competencies from them, so to increase their likelihood to generate value-creating activities and to impact on wider range of stakeholders, including funders, partners, beneficiaries and communities; they can mimic hybrids on how to innovate their business model through the use of the “deliberate resource misfit” dynamic capability, mitigating negative impacts and trade-offs and maximizing positive value spillovers, both for the firms themselves and for the community. Social implications Sharing know-how with hybrids opens up to ways to innovate business models, and hybrids are much more open to sharing lessons and encouraging others to copy their approaches in a genuine open innovation approach. Originality/value The main lesson businesses can take away from studying hybrids is that antagonistic assets – and not only profitable complementary ones, as the resource-based view would suggest – do not have to be a burden on profits. Hybrids ground their strategy first and foremost on their beneficiaries, thus dealing with a bundle of antagonistic assets. The primary objective of hybrids is thus to find imaginative ways of generating profits from their given resources rather than acquiring the resources that generate the highest profit. Profit is the ultimate goal of traditional businesses’ mission, but by making profit their only mission, firms risk missing out on the hidden opportunities latent in antagonistic assets. Learning from hybrids about how to align profits and societal impact may be a driver of long-term competitive advantage.


Author(s):  
William A. Bruce ◽  
Bradley C. Etheridge ◽  
Andrew Carman

Welds made onto in-service pipelines are particularly susceptible to hydrogen cracking. During qualification of welding procedures, limits are often imposed on heat-affected zone hardness (e.g., 350 HV max.) as a way to avoid cracking. The hardness level below which hydrogen cracking does not occur is not a fixed value, but varies as a function of several parameters. The results of previous work resulted in the development of hardness evaluation criteria that can be used to quantify the trade-offs that can be made between HAZ hardness, hydrogen level, and the chemical composition of the materials being welded for welds made onto in-service pipelines. This paper describes a current project that is being sponsored in part by the US Department of Transportation – Pipeline and Hazardous Materials Safety Administration, which is focusing on the further development and validation of these criteria, particularly for modern microalloyed materials and material over a wide range of wall thicknesses. The use of these criteria will reduce the cost and increase the reliability of pipeline modifications and repairs.


2018 ◽  
Author(s):  
Sang-Hyun Lee ◽  
Rabi H. Mohtar ◽  
Seung-Hwan Yoo

Abstract. The aim of this study is to analyze the impacts of food trade on food security and water-land savings in the Arab World in terms of virtual water trade (VWT). We estimated the total volume of virtual water imported for four major crops – barley, maize, rice, and wheat – from 2000 to 2012, and assessed their impacts on water and land savings, and food security. The largest volume of virtual water was imported by Egypt (19.9 billion m3/year), followed by Saudi Arabia (13.0 billion m3/year). Accordingly, Egypt would save 13.1 billion m3 in irrigation water and 2.1 million ha of crop area through importing crops. In addition, connectivity and influence of each country in the VWT network was analyzed using degree and eigenvector centralities. The study revealed that the Arab World focused more on increasing the volume of virtual water imported during the period 2006–2012 with little attention to the expansion of connections with country exporters, which is a vulnerable expansion. This study shed light on opportunities and risks associated with VWT and its role in food security and land management in the Arab World.


2019 ◽  
Author(s):  
Scott Barnett ◽  
Kit Huckvale ◽  
Helen Christensen ◽  
Svetha Venkatesh ◽  
Kon Mouzakis ◽  
...  

UNSTRUCTURED In this viewpoint we describe the architecture of, and design rationale for, a new software platform designed to support the conduct of digital phenotyping research studies. These studies seek to collect passive and active sensor signals from participants' smartphones for the purposes of modelling and predicting health outcomes, with a specific focus on mental health. We also highlight features of the current research landscape that recommend the coordinated development of such platforms, including the significant technical and resource costs of development, and we identify specific considerations relevant to the design of platforms for digital phenotyping. In addition, we describe trade-offs relating to data quality and completeness versus the experience for patients and public users who consent to their devices being used to collect data. We summarize distinctive features of the resulting platform, InSTIL (Intelligent Sensing to Inform and Learn), which includes universal (ie, cross-platform) support for both iOS and Android devices and privacy-preserving mechanisms which, by default, collect only anonymized participant data. We conclude with a discussion of recommendations for future work arising from learning during the development of the platform. The development of the InSTIL platform is a key step towards our research vision of a population-scale, international, digital phenotyping bank. With suitable adoption, the platform will aggregate signals from large numbers of participants and large numbers of research studies to support modelling and machine learning analyses focused on the prediction of mental illness onset and disease trajectories.


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