Sense and the city: An Emotion Data Framework for smart city governance

In the smart city agenda, data plays a key role in shaping governance and participation around urban planning, and this data is increasingly derived from sensors of all kinds. These sensors increasingly include physiological and sentiment analysis to gauge the emotional states of urban citizens. In urban planning, emotional data has so far been conceptualised as ‘people as sensors’ where data is used to create an aggregated emotion layer for real-time urban planning. This paper argues this approach does not enable citizens any meaningful participation in urban planning. In contrast, this paper demonstrates what emotion can ‘do’ when citizen actively use emotions to participate in the problem framing in smart city governance. The paper offers a framework of smart city participation with emotion data by focusing on the Bio Mapping project, where physiological sensors are used as participatory mapping approach that led to urban planning. This approach enabled citizens to engage in a dialogue around their emotional response to urban space and articulate the potential for emotion data in urban governance. There needs to be a consideration of 1) multi-dimensional emotion data, 2) an active participant role, 3) extended participation within the planning process 4), and empowerment within urban governance. The paper argues that a participatory approach to emotion data can function as a dynamic leverage point of negotiation in smart city governance between citizens, urban space, and civic agencies

Reentrant superconductivity in superconductor/ferromagnetic-alloy bilayers

We studied the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) like state establishing due to the proximity effect in superconducting Nb/Cu41Ni59 bilayers. Using a special wedge-type deposition technique, series of 20-35 samples could be fabricated by magnetron sputtering during one run. The layer thickness of only a few nanometers, the composition of the alloy, and the quality of interfaces were controlled by Rutherford backscattering spectrometry, high resolution transmission electron microscopy, and Auger spectroscopy. The magnetic properties of the ferromagnetic alloy layer were characterized with superconducting quantum interference device (SQUID) magnetometry. These studies yield precise information about the thickness, and demonstrate the homogeneity of the alloy composition and magnetic properties along the sample series. The dependencies of the critical temperature on the Nb and Cu41Ni59 layer thickness, Tc(dS) and Tc(dF), were investigated for constant thickness dF of the magnetic alloy layer and dS of the superconducting layer, respectively. All types of non-monotonic behaviors of Tc versus dF predicted by the theory could be realized experimentally: from reentrant superconducting behavior with a broad extinction region to a slight suppression of superconductivity with a shallow minimum. Even a double extinction of superconductivity was observed, giving evidence for the multiple reentrant behavior predicted by theory. All critical temperature curves were fitted with suitable sets of parameters. Then, Tc(dF) diagrams of a hypothetical F/S/F spin-switch core structure were calculated using these parameters. Finally, superconducting spin-switch fabrication issues are discussed in detail in view of the achieved results.Comment: 34 pages, 9 figure

The pressure tensor across a liquid-vapour interface

© 2018, The Authors. Inhomogeneous fluids exhibit physical properties that are neither uniform nor isotropic. The pressure tensor is a case in point, key to the mechanical description of the interfacial region. Kirkwood and Buff and, later, Irving and Kirkwood, obtained a formal treatment based on the analysis of the pressure across a planar surface [J. G. Kirkwood and F. P. Buff, J. Chem. Phys. 17(3), 338 (1949); J. H. Irving and J. G. Kirkwood, J. Chem. Phys. 18, 817 (1950)]. We propose a generalisation of Irving and Kirkwood’s argument to fluctuating, non-planar surfaces and obtain an expression for the pressure tensor that is not smeared by thermal fluctuations at the molecular scale and corresponding capillary waves [F. P. Buff et al., Phys. Rev. Lett. 15, 621–623 (1965)]. We observe the emergence of surface tension, defined as an excess tangential stress, acting exactly across the dividing surface at the sharpest molecular resolution. The new statistical mechanical expressions extend current treatments to fluctuating inhomogeneous systems far from equilibrium.European Research Council (ERC) Advanced Grant No. 247031; Engineering and Physical Sciences Research Council (EPSRC) Grant No. EP/L020564

Nonequilibrium molecular dynamics simulations of nanoconfined fluids at solidliquid interfaces

We investigate the hydrodynamic properties of a Lennard-Jones fluid confined to a nanochannel using molecular dynamics simulations. For channels of different widths and hydrophilic-hydrophobic surface wetting properties, profiles of the fluid density, stress, and viscosity across the channel are obtained and analysed. In particular, we propose a linear relationship between the density and viscosity in confined and strongly inhomogeneous nanofluidic flows. The range of validity of this relationship is explored in the context of coarse grained models such as dynamic density functional-theory

Bodies Moving and Being Moved: Mapping affect in Christian Nold's Bio Mapping

In A History of Spaces (2004), John Pickles observes that one of the less well-known representational norms of mapping is its focus on ‘natural and physical objects rather than developing universal conventions dealing with symbol, affect and movement.’ New media artist Christian Nold's work has dealt explicitly with two of these cartographic blindspots, grafting new and old technologies that both, in different ways, create bodily traces – the GPS trace of movement and the GSR (galvanic skin response) trace of arousal, often taken as an index of emotional response. Although Nold's socially engaged practice can be placed within the ‘locative media’ genre it also taps into the technological imaginaries around physiological sensors and intimate data. This paper considers Nold's Bio Mapping (2004-) projects in the context of his longstanding concern with social collectives and public space as a field of social relations. Looking at particular maps from Nold's Bio Mapping project, it considers the implications of blending the traces of the body's internal states with the traces produced by locomotive movement, and the relationship between the individuals thus traced and the collectives that Nold seeks to represent. Concurrent with Nold's practice there has been a wave of interest in affect and emotion (and the distinction between them) within the humanities. This paper brings Nold's work into contact with the Deleuzian/Spinozan concept of affect employed in one strand of this writing, drawing in particular on the work of Brian Massumi. Rather than using theory to simply illustrate Nold's practice, it follows the implications of Deleuze's cartographic model of individuation, the logic of which ultimately problematises the very distinction between the two bodily phenomena traced by Nold's device

Cyanobacterial life at low O 2 : community genomics and function reveal metabolic versatility and extremely low diversity in a Great Lakes sinkhole mat

Cyanobacteria are renowned as the mediators of Earth’s oxygenation. However, little is known about the cyanobacterial communities that flourished under the low‐O 2 conditions that characterized most of their evolutionary history. Microbial mats in the submerged Middle Island Sinkhole of Lake Huron provide opportunities to investigate cyanobacteria under such persistent low‐O 2 conditions. Here, venting groundwater rich in sulfate and low in O 2 supports a unique benthic ecosystem of purple‐colored cyanobacterial mats. Beneath the mat is a layer of carbonate that is enriched in calcite and to a lesser extent dolomite. In situ benthic metabolism chambers revealed that the mats are net sinks for O 2 , suggesting primary production mechanisms other than oxygenic photosynthesis. Indeed, 14 C‐bicarbonate uptake studies of autotrophic production show variable contributions from oxygenic and anoxygenic photosynthesis and chemosynthesis, presumably because of supply of sulfide. These results suggest the presence of either facultatively anoxygenic cyanobacteria or a mix of oxygenic/anoxygenic types of cyanobacteria. Shotgun metagenomic sequencing revealed a remarkably low‐diversity mat community dominated by just one genotype most closely related to the cyanobacterium Phormidium autumnale , for which an essentially complete genome was reconstructed. Also recovered were partial genomes from a second genotype of Phormidium and several Oscillatoria . Despite the taxonomic simplicity, diverse cyanobacterial genes putatively involved in sulfur oxidation were identified, suggesting a diversity of sulfide physiologies. The dominant Phormidium genome reflects versatile metabolism and physiology that is specialized for a communal lifestyle under fluctuating redox conditions and light availability. Overall, this study provides genomic and physiologic insights into low‐O 2 cyanobacterial mat ecosystems that played crucial geobiological roles over long stretches of Earth history.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/90535/1/j.1472-4669.2012.00322.x.pd

User experience of digital technologies in citizen science

The growing interest in citizen science has resulted in a new range of digital tools that facilitate the interaction and communications between citizens and scientists. Considering the ever increasing number of applications that currently exist, it is surprising how little we know about how volunteers interact with these technologies, what they expect from them, and why these technologies succeed or fail. Aiming to address this gap, JCOM organized this special issue on the role of User Experience (UX) of digital technologies in citizen science which is the first to focus on the qualities and impacts of interface and user design within citizen science. Seven papers are included that highlight three key aspects of user-focused research and methodological approaches. In the first category, "design standards", the authors explore the applicability of existing standards, build and evaluate a set of guidelines to improve interactions with citizen science applications. In the second, "design methods", methodological approaches for getting user feedback, analysing user behaviour and exploring different interface designs modes are explored. Finally, "user experience in the physical and digital world" explores crossovers with other fields to improve our understanding of user experiences and demonstrate how design choices not only influence digital interactions but also shape interactions with the wider world