Application of an Intuitive, Glove-type Remote Control with Haptic Feedback to Quadcopters

Although remote controllers for drones, based upon a classic two-joystick architecture, are unwieldy, they still see widespread use. As a replacement, we propose a remote control with a glove-based architecture that utilizes haptic feedback from the quadcopter. The proposed controller should be far more intuitive, making drone flight easier and more intuitive. Additionally, since the pilot will have one hand free, he or she can use maps, electronics, and other aids much more straightforwardly than with a two-handed controller. While our technology is designed for drones, it also could see further usage in a wide variety of civilian and military applications, from entertainment to industry. This glove-based architecture with haptic feedback might well become a staple of the future

A note on the probability of generating alternating or symmetric groups

We improve on recent estimates for the probability of generating the alternating and symmetric groups $\mathrm{Alt}(n)$ and $\mathrm{Sym}(n)$. In particular we find the sharp lower bound, if the probability is given by a quadratic in $n^{-1}$. This leads to improved bounds on the largest number $h(\mathrm{Alt}(n))$ such that a direct product of $h(\mathrm{Alt}(n))$ copies of $\mathrm{Alt}(n)$ can be generated by two elements

Establishing an analogue population for the most distant galaxies

Lyman break analogues (LBAs) are local galaxies selected to match a more distant (usually z~3) galaxy population in luminosity, UV-spectral slope and physical characteristics, and so provide an accessible laboratory for exploring their properties. However, as the Lyman break technique is extended to higher redshifts, it has become clear that the Lyman break galaxies (LBGs) at z~3 are more massive, luminous, redder, more extended and at higher metallicities than their z~5 counterparts. Thus extrapolations from the existing LBA samples (which match z=3 properties) have limited value for characterising z>5 galaxies, or inferring properties unobservable at high redshift. We present a new pilot sample of twenty-one compact star forming galaxies in the local (0.05<z<0.25) Universe, which are tuned to match the luminosities and star formation volume densities observed in z>~5 LBGs. Analysis of optical emission line indices suggests that these sources have typical metallicities of a few tenths Solar (again, consistent with the distant population). We also present radio continuum observations of a subset of this sample (13 sources) and determine that their radio fluxes are consistent with those inferred from the ultraviolet, precluding the presence of a heavily obscured AGN or significant dusty star formation.Comment: 13 pages, MNRAS accepte

Oil shocks and price stability

Petroleum industry and trade ; Prices