Quick printed guide to zappers (Turning Point 5)

One side of A4 which provides step-by-step instructions to help you use Tunring Point 5 in Common Learning Spaces. Includes advice about dealing with technical glitches.

Micromachined waveguide antennas for 1.6 THz

A new type of horn antenna for operation at 1.6 THz, that can be fabricated monolithically with 1/4-height micromachined waveguide, is described. Height, limitations imposed by the micromachining process are overcome by removing a tapered slot in the upper surface of a scalar horn, allowing the E-plane fields to extend outside the confines of the metallic structure before radiation, with a consequent reduction in E-plane beamwidth. 1.6 THz radiation pattern measurements for different designs show that, while there is scope for further optimisation, 3 dB beamwidths of 24 degrees and 17.5 degrees in the E- and H-planes, respectively, can be achieved.

Detecting the number of signals using antenna array: a single threshold solution

A new approach is presented to identify the number of incoming signals in antenna array processing. The new method exploits the inherent properties existing in the noise eigenvalues of the covariance matrix of the array output. A single threshold has been established concerning information about the signal and noise strength, data length, and array size. When the subspace-based algorithms are adopted the computation cost of the signal number detector can almost be neglected. The performance of the threshold is robust against low SNR and short data length.

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.