Digital desing for neuroporphic bio-inspired vision processing.

Artificial Intelligence (AI) is an exciting technology that flourished in this century. One of the goals for this technology is to give learning ability to computers. Currently, machine intelligence surpasses human intelligence in specific domains. Besides some conventional machine learning algorithms, Artificial Neural Networks (ANNs) is arguably the most exciting technology that is used to bring this intelligence to the computer world. Due to ANN’s advanced performance, increasing number of applications that need kind of intelligence are using ANN. Neuromorphic engineers are trying to introduce bio-inspired hardware for efficient implementation of neural networks. This hardware should be able to simulate a vast number of neurons in real-time with complex synaptic connectivity while consuming little power. The work that has been done in this thesis is hardware oriented, so it is necessary for the reader to have a good understanding of the hardware that is used for developments in this thesis. In this chapter, we provide a brief overview of the hardware platforms that are used in this thesis. Afterward, we explain briefly the contributions of this thesis to the bio-inspired processing research line

CAMAC bulletin: A publication of the ESONE Committee Issue #4 July 1972

CAMAC is a means of interconnecting many peripheral devices through a digital data highway to a data processing device such as a computer

Mass transfer between single bubbles and Newtonian and non-Newtonian liquids

Instantaneous values of bubble volume, shape, rise velocity, overall mass transfer product, surface area and overall mass transfer coefficient for single carbon dioxide bubbles in free rise through liquids contained in a 10.16 cm I.D. column were experimentally evaluated.In the experimental investigations, a novel data processing technique was used which allowed accurate measurement of the instantaneous rate of change of pressure of the constant volume system, consisting of a liquid contained in the mass transfer column and isolated from the atmosphere, as a bubble rose through the liquid and dissolved in it.A wide range of bubble sizes (0.2 - 6.0 cm diameter) was investigated in three Newtonian liquids - distilled water and two aqueous Glycerol solutions - and a non-Newtonian viscoelastic aqueous Polyox solution, which exhibited pseudoplastic behaviour in steady shear. Detailed comparisons of the collected data with existing theoretical models relating to bubble rise velocity and overall mass transfer coefficient were carried out.In the carbon dioxide-distilled water system, bubble shape was seen to go from spherical to oblate spheroidal to spherical cap with increasing bubble size. Bubble shapes observed in the two aqueous Glycerol solutions were similar to those observed in water, with an additional > hemisphere shape and the occurrence of spherical cap bubble skirting in the more concentrated Glycerol solution.The shapes and terminal rise velocities of large bubbles in the Newtonian liquids were found to be influenced by the proximity of the column walls. The terminal rise velocity data for bubbles in the non-Newtonian Polyox solution was lower than for distilled water; and exhibited an abrupt increase by a factor in excess of 4 at a critical bubble size. Bubbles in the Polyox solution exhibited tailing over the size range 0.27 cm ≤ Dₑ < 2.2 cm. Bubble tailing is known to be peculiar to non -Newtonian fluid fields. In the Polyox solution suitable bubble sizes adopted spherical, prolate spheroidal, oblate spheroidal and spherical cap shapes. A previously unreported spherical cap bubble rear configuration was observed for large bubbles in the Polyox solution.Instantaneous overall mass transfer coefficients based on actual bubble surface areas were evaluated. The transfer coefficients of small bubbles in all four solutions investigated were closely predicted by theoretical equations for circulating spheres and for rigid spheres in creeping flow. The transfer coefficient data for carbon dioxide bubbles in the Polyox solution confirmed the suggestion (A7) that at the critical bubble size in viscoelastic pseudoplastic liquids a transfer from rigid to circulating body behaviour in creeping flow occurred. Certain bubble shape transitions were found to result in maxima in the transfer coefficient versus diameter plots for the solutions investigated

Topical Workshop on Electronics for Particle Physics

The purpose of the workshop was to present results and original concepts for electronics research and development relevant to particle physics experiments as well as accelerator and beam instrumentation at future facilities; to review the status of electronics for the LHC experiments; to identify and encourage common efforts for the development of electronics; and to promote information exchange and collaboration in the relevant engineering and physics communities

CAMAC bulletin: A publication of the ESONE Committee Issue #4 July 1972

CAMAC is a means of interconnecting many peripheral devices through a digital data highway to a data processing device such as a computer

Simulation of turbocharged diesel engines under transient conditions

Imperial Users onl

Analysis of Hardware Descriptions

The design process for integrated circuits requires a lot of analysis of circuit descriptions. An important class of analyses determines how easy it will be to determine if a physical component suffers from any manufacturing errors. As circuit complexities grow rapidly, the problem of testing circuits also becomes increasingly difficult. This thesis explores the potential for analysing a recent high level hardware description language called Ruby. In particular, we are interested in performing testability analyses of Ruby circuit descriptions. Ruby is ammenable to algebraic manipulation, so we have sought transformations that improve testability while preserving behaviour. The analysis of Ruby descriptions is performed by adapting a technique called abstract interpretation. This has been used successfully to analyse functional programs. This technique is most applicable where the analysis to be captured operates over structures isomorphic to the structure of the circuit. Many digital systems analysis tools require the circuit description to be given in some special form. This can lead to inconsistency between representations, and involves additional work converting between representations. We propose using the original description medium, in this case Ruby, for performing analyses. A related technique, called non-standard interpretation, is shown to be very useful for capturing many circuit analyses. An implementation of a system that performs non-standard interpretation forms the central part of the work. This allows Ruby descriptions to be analysed using alternative interpretations such test pattern generation and circuit layout interpretations. This system follows a similar approach to Boute's system semantics work and O'Donnell's work on Hydra. However, we have allowed a larger class of interpretations to be captured and offer a richer description language. The implementation presented here is constructed to allow a large degree of code sharing between different analyses. Several analyses have been implemented including simulation, test pattern generation and circuit layout. Non-standard interpretation provides a good framework for implementing these analyses. A general model for making non-standard interpretations is presented. Combining forms that combine two interpretations to produce a new interpretation are also introduced. This allows complex circuit analyses to be decomposed in a modular manner into smaller circuit analyses which can be built independently

NASA Tech Briefs, May 1989

This issue contains a special feature on the flight station of the future, discussing future enhancements to Aircraft cockpits. Topics include: Electronic Components and Circuits. Electronic Systems, Physical Sciences, Materials, Computer Programs, Mechanics, Machinery, Fabrication Technology, and Mathematics and Information Sciences