Low-energy M1 excitation mode in 172Yb

SOLAR p - MODE EXCITATION : FURTHER INSIGHT FROM RECENT LOW - `

We present measurements of low-degree solar p-mode linewidths, velocity powers, energies and energy supply rates between 1600 Hz and 4700 Hz, as derived from the analysis of several years of high-quality helioseismological data collected by the Birmingham Solar-Oscillations Network (BiSON). For the radial (` = 0) modes, we nd that the total energy E per mode (kinetic plus potential) peaks at 32...

Low frequency room excitation using Distributed Mode Loudspeakers

Conventional pistonic loudspeakers excite the modes of an enclosed sound field in such a way as to introduce modal artefacts which may be problematic for listeners to high-quality reproduced sound [1]. Their amelioration may involve the use of highly space-consumptive passive absorptive devices or active control techniques [eg 2,3,4]. Other approaches have concentrated on the design of the driv...

A low energy dual-mode adder

VLSI designs are typically data-independent and as such, they must produce the correct result even for the worst-case inputs. Adders in particular assume that addition must be completed within prescribed number of clock cycles, independently of the operands. While the longest carry propagation of an n-bit adder is n bits, its expected length is only O(log2n) bits. We present a novel dual-mode a...

Mode Excitation in a Gyrotron

Electronic excitation of H2O by low-energy electron impact.