High speed electrodeposition using fluidised beds

The relevant literature, relating to electrochemical cells, mass transfer, fluidised beds and mass transfer in fluidised beds, has been reviewed. Extensive experimental data for the cathodic reduction of copper fron acid CuSO4 electrolytes, in fluidised beds of copper powder, demonstrated the effectiveness of the cell at removing copper from the electrolytes. For a given bed weight the cell only acted efficiently below 25% bed expansion. Above this the operation of the cell changed to that of acting as a turbulent promoter for the feeder electrode. Two modes of cell operation were investigated. The electrolyte flow was either parallel or perpendicular to current flow. Of the two, electrolyte flow perpendicular to current flow was more effective overall, as it was more amenable to scale-up of the cell. When electrolyte flow and current flow were parallel particles in the bed had to be within a radius of one centimetre for the cell to act efficiently Potential. gradients within the bed caused many problems and prevented limiting currents from being observed because of secondary reactions increasing the total current from the bed. Preferential polarization. of the bed during potentiodynamic sweeps of the cathode caused reactions-to occur at low 'apparent' overvoltages. This was more noticeable in concentrated electrolytes or when larger beds were used

Analysis of Dialogical Argumentation via Finite State Machines

Dialogical argumentation is an important cognitive activity by which agents exchange arguments and counterarguments as part of some process such as discussion, debate, persuasion and negotiation. Whilst numerous formal systems have been proposed, there is a lack of frameworks for implementing and evaluating these proposals. First-order executable logic has been proposed as a general framework for specifying and analysing dialogical argumentation. In this paper, we investigate how we can implement systems for dialogical argumentation using propositional executable logic. Our approach is to present and evaluate an algorithm that generates a finite state machine that reflects a propositional executable logic specification for a dialogical argumentation together with an initial state. We also consider how the finite state machines can be analysed, with the minimax strategy being used as an illustration of the kinds of empirical analysis that can be undertaken.Comment: 10 page

Subjective Logic and Arguing with Evidence

Peer reviewedPreprin

Arguing and negotiating in the presence of social influences

Postprin

Molecular characterization of Trichomonas gallinae isolates recovered from the Canadian Maritime provinces’ wild avifauna reveals the presence of the genotype responsible for the European finch trichomonosis epidemic and additional strains

Finch trichomonosis, caused by Trichomonas gallinae, emerged in the Canadian Maritime provinces in 2007 and has since caused ongoing mortality in regional purple finch (Carpodacus purpureus) and American goldfinch (Carduelis tristis) populations. Trichomonas gallinae was isolated from (1) finches and rock pigeons (Columbia livia) submitted for post-mortem or live-captured at bird feeding sites experiencing trichomonosis mortality; (2) bird seed at these same sites; and (3) rock pigeons live-captured at known roosts or humanely killed. Isolates were characterized using internal transcribed spacer (ITS) region and iron hydrogenase (Fe-hyd) gene sequences. Two distinct ITS types were found. Type A was identical to the UK finch epidemic strain and was isolated from finches and a rock pigeon with trichomonosis; apparently healthy rock pigeons and finches; and bird seed at an outbreak site. Type B was obtained from apparently healthy rock pigeons. Fe-hyd sequencing revealed six distinct subtypes. The predominant subtype in both finches and the rock pigeon with trichomonosis was identical to the UK finch epidemic strain A1. Single nucleotide polymorphisms in Fe-hyd sequences suggest there is fine-scale variation amongst isolates and that finch trichomonosis emergence in this region may not have been caused by a single spill-over event

Big Splashes & Ripple Effects: Research Impact Services Across University Libraries

Poster presented at the American Library Association (ALA) 2017 Conferenc