Radio Carbon - Hybrid Documentary Process

Radio Carbon is a documentary made using a methodology for creating conscious digital video projects with a process privileging respect for crew, subject, and environment over the needs of a commercial, or market driven product. The guidelines imposed by this method are fluid, and project-specific in terms of their exact interpretation for each film. This project is meant to demonstrate a production style that allows for work to be made by the participants without a dominating creative force at every stage of production. This is made possible through the introduction of chance operations at several key points along the production process, and in doing so we wrest some measure of cinematic honesty from projects that would otherwise be particularly vulnerable to auteur bias. For this specific project, I have applied these practices to a hybrid documentary personal essay film. The film employs a fictional narrative as a framing device for interviews with three of my former art professors as they discuss their different approaches to the artistic process as it relates to their own personal transformations and cycles within their lives. These interviews are intercut with the narrative journey made by the crew between subjects after visiting one of Colorado’s many abandoned mines and carrying with us a dangerous artifact that begins to corrode my body, mind, and even the video files in the finished sequences. The juxtapositions between these sequences are marked by video compression glitches. By blending clips together and denying a strict boundary between truth and fiction on screen, the film asks how we can approach digital cinema while understanding that by simply observing something we are destroying and recreating the world around us, as well as the world on screen

Well structured program equivalence is highly undecidable

We show that strict deterministic propositional dynamic logic with intersection is highly undecidable, solving a problem in the Stanford Encyclopedia of Philosophy. In fact we show something quite a bit stronger. We introduce the construction of program equivalence, which returns the value $\mathsf{T}$ precisely when two given programs are equivalent on halting computations. We show that virtually any variant of propositional dynamic logic has $\Pi_1^1$-hard validity problem if it can express even just the equivalence of well-structured programs with the empty program \texttt{skip}. We also show, in these cases, that the set of propositional statements valid over finite models is not recursively enumerable, so there is not even an axiomatisation for finitely valid propositions.Comment: 8 page

Is perception cognitively penetrable? A philosophically satisfying and empirically testable reframing

The question of whether perception can be penetrated by cognition is in the limelight again. The reason this question keeps coming up is that there is so much at stake: Is it possible to have theory-neutral observation? Is it possible to study perception without recourse to expectations, context, and beliefs? What are the boundaries between perception, memory, and inference (and do they even exist)? Are findings from neuroscience that paint a picture of perception as an inherently bidirectional and interactive process relevant for understanding the relationship between cognition and perception? We have assembled a group of philosophers and psychologists who have been considering the thesis of cognitive (im)penetrability in light of these questions (Abdel Rahman & Sommer, 2008; Goldstone, Landy, & Brunel, 2011; Lupyan, Thompson-Schill, & Swingley, 2010; Macpherson, 2012; Stokes, 2011). Rather than rehashing previous arguments which appear, in retrospect, to have been somewhat ill-posed (Pylyshyn, 1999), this symposium will present a thesis of cognitive (im)penetrability that is at once philosophically satisfying, empirically testable, and relevant to the questions that cognitive scientists find most interesting

The roman fort at south shields (arbeia): a study in the spatial patterning of the faunal remains

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The Casimir effect for fields with arbitrary spin

The Casimir force between two perfectly reflecting parallel plates is considered. In a recent paper we presented generalised physical boundary conditions describing perfectly reflecting parallel plates. These boundary conditions are applicable to a field possessing any spin, and include the well-known spin-1/2 and spin-1 boundary conditions as special cases. Here we use these general boundary conditions to show that the allowed values of energy-momentum turn out to be the same for any massless fermionic field and the same for any massless bosonic field. As a result one expects to obtain only two possible Casimir forces, one associated with fermions and the other with bosons. We explicitly verify that this is the case for the fields up to spin-2. A significant implication of our work is that periodic boundary conditions cannot be applied to a fermionic field confined between two parallel plates

Lifetime performance characteristics of screen-printed potentiometric Ag/AgCl chloride sensors

Ag/AgCl chloride sensors were fabricated using thick-film technology. A number of different formulations were prepared and chloride responses were investigated over time. Near Nernstian, identical responses were observed over the first 160 days with an average chloride sensitivity of -51.8 ± 0.4 mV per decade change in chloride concentration (pCl), irrespective of paste formulation. After 6- months continuous immersion in tap water, pastes formulated with a glass binder began to exhibit a loss in sensitivity whilst those formulated from a commercial thickfilm dielectric paste remained functional for the best part of a year. The difference is attributed to the inclusion of proprietary additives in the commercial paste aiding adhesion and minimising AgCl leaching

Screen-printed platinum electrodes for measuring crevice corrosion: Nickel aluminium bronze as an example

Screen-printed platinum electrodes were used to monitor crevice corrosion processes. The electrodes, printed on an inert alumina substrate, formed the bottom of an artificial crevice when mechanically clamped to a rectangular block of nickel-aluminium bronze (NAB). Cyclic differential pulse voltammetry was used to detect corrosion products over time whilst the assembly was immersed in a 3.5% by weight aqueous solution of sodium chloride. Cupric (Cu2+), ferric (Fe3+) and ferrous (Fe2+) ions were detected with evolution profiles indicative of selective phase corrosion

Screen-printed platinum electrodes for the detection of cupric and ferric ions in high chloride backgrounds

Screen-printed platinum electrodes developed for use in corrosion monitoring applications have been used to detect cupric and ferric ions both individually and as mixtures in a background of 3.5% by weight sodium chloride and in the presence of dissolved oxygen. In single species detection linear responses for the Fe3+/Fe2+ couple were observed over the concentration range 0.3 to 100mM. By contrast, the small size of the working electrode caused a current limiting response for cupric ions over the same concentration range. In mixtures of these ions, the sensors show good differentiation and are able to separate the individual metal ion responses

2D KINEMATIC AND KINETIC CHARACTERISTICS OF THE DRAGON BOAT PADDLING STROKE

The aim of this study was to combine 2D force measurements on a dragon boat paddle with synchronised 2D video data, establish the main kinetic and kinematic parameters for key paddle events and measure the paddle displacement between entry and exit points on the surface of the water. A custom built strain gauged paddle and a stationary high speed video camera was used to collect synchronised data at 200 Hz. Results for skilled versus club level paddlers were significant with a large effect size for propulsive impulse, impulse workload, maximum paddle force, average paddle force, force development, stroke length, paddle displacement, and, paddle angles at maximum force, zero force, exit and minimum force. Paddle displacement at the water interface is in the direction of boat movement and this may indicate a breaking force during part of the paddling stroke