Verification and FPGA circuits of a block-2 fast path-based predictor

This paper formally derives a new path-based neural branch prediction algorithm (FPP) into blocks of size two for a lower hardware solution while maintaining similar input-output characteristic to the algorithm. The blocked solution, here referred to as B2P algorithm, is obtained using graph theory and retiming methods. Verification approaches were exercised to show that prediction performances obtained from the FPP and B2P algorithms differ within one mis-prediction per thousand instructions using a known framework for branch prediction evaluation. For a chosen FPGA device, circuits generated from the B2P algorithm showed average area savings of over 25% against circuits for the FPP algorithm with similar time performances thus making the proposed blocked predictor superior from a practical viewpoint.

Active micromachined integrated terahertz circuits

Schottky barrier diodes have been integrated into on-chip rectangular waveguides. Two novel techniques have been developed to fabricate diodes with posts suitable for integration into waveguides. One technique produces diodes with anode diameters of the order of microns with post heights from 90 to 125 microns and the second technique produces sub-micron anodes with post heights around 20 microns. A method has been developed to incorporate these structures into a rectangular waveguide and provide a top contact onto the anode which could be used as an I.F. output in a mixer circuit. Devices have been fabricated and D.C. characterized.

The printed page

In the year 1702 two books were published, in Oxford and Paris, that can now be seen as defining the presses that produced them. In Paris, the Imprimerie Royale issued the Médailles sur les principaux évènements du règne de Louis le Grand, a large folio of text and plates intended to glorify the regime of Louis XIV. In Oxford, the first, large format volume of Clarendon’s The history of the rebellion appeared; painstakingly edited at Christ Church, it brought prestige and profit to the University. Both were considerable statements of publishing intent in graphic form: both were sumptuous, and both used types and decorations reserved to their respective presses. But the French book points the way to future developments in typography, particularly in the design of type, while the Oxford book is a summation of the past, and its types and page design would be abandoned by the Oxford press in little more than thirty years. Tracing the printed pages of Oxford books from the late sixteenth to the mid-eighteenth century shows changes that parallel wider developments in English and European typography, but from a distinctly Oxford perspective.