Home Truths?

An academic approach to the popular use of video production technolog

Pulsology Reloaded

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Home Truths?: Video Production and Domestic Life

Over the past decade, the video camera has become a commonplace household technology. With falling prices on compact and easy-to-use cameras, as well as mobile phones and digital still cameras with video recording capabilities, access to moving image production technology is becoming virtually universal. Home Truths? represents one of the few academic research studies exploring this everyday, popular use of video production technology, looking particularly at how families use and engage with the technology and how it fits into the routines of everyday life. The authors draw on interviews, observations, and the participants' videos themselves, seeking to paint a comprehensive picture of the role of video making in their everyday lives. While readers gain a sense of the individual characters involved in the project and the complexities and diversities of their lives, the analysis also raises a range of broader issues about the nature of learning and creativity, subjectivity and representation, and the ""domestication"" of technology—issues that are of interest to many in the fields of sociology and media/cultural studies

Dipolar ground state of planar spins on triangular lattices

An infinite triangular lattice of classical dipolar spins is usually considered to have a ferromagnetic ground state. We examine the validity of this statement for finite lattices and in the limit of large lattices. We find that the ground state of rectangular arrays is strongly dependent on size and aspect ratio. Three results emerge that are significant for understanding the ground state properties: i) formation of domain walls is energetically favored for aspect ratios below a critical valu e; ii) the vortex state is always energetically favored in the thermodynamic limit of an infinite number of spins, but nevertheless such a configuration may not be observed even in very large lattices if the aspect ratio is large; iii) finite range approximations to actual dipole sums may not provide the correct ground sta te configuration because the ferromagnetic state is linearly unstable and the domain wall energy is negative for any finite range cutoff.Comment: Several short parts have been rewritten. Accepted for publication as a Rapid Communication in Phys. Rev.

Operability-economics trade-offs in adsorption-based CO2_2 capture process

Low-carbon dispatchable power underpins a sustainable energy system, providing load balancing complementing wide-scale deployment of intermittent renewable power. In this new context, fossil fuel-fired power plants must be coupled with a post-combustion carbon capture (PCC) process capable of highly transient operation. To tackle design and operational challenges simultaneously, we have developed a computational framework that integrates process design with techno-economic assessment. The backbone of this is a high-fidelity PCC mathematical model of a pressure-vacuum swing adsorption process. We demonstrate that the cost-optimal design has limited process flexibility, challenging reactiveness to disturbances, such as those in the flue gas feed conditions. The results illustrate that flexibility can be introduced by relaxing the CO$_2$ recovery constraint on the operation, albeit at the expense of the capture efficiency of the process. We discover that adsorption-based processes can accommodate for significant flexibility and improved performance with respect to the operational constraints on CO$_2$ recovery and purity. The results herein demonstrate a trade-off between process economics and process operability, which must be effectively rationalised to integrate CO$_2$ capture units in the design of low-carbon energy systems.Comment: Pre-print paper currently under review. 32 pages, 6 figures. The first two authors contributed equally to this wor