The socio-economic, political, and even cultural consequences of the Covid-19 pandemic are Originals 70s Crop Boot more than obvious.They affect the whole world and are relevant in all spheres and levels of social and public life.Numerous anti-pandemic measures, mainly the closure of borders, restrictions on the movement of citizens, and isolation
A Message Passing-Assisted Iterative Noise Cancellation Method for Clipped OTFS-BFDM Systems
Compared with orthogonal frequency division multiplexing (OFDM) systems, orthogonal time frequency space systems based on bi-orthogonal frequency division multiplexing (OTFS-BFDM) have lower out-of-band emission (OOBE) and better robustness to high-mobility scenarios, but suffer from a higher peak-to-average ratio (PAPR) in large data packets.In th
Colemanus keeleyorum (Braconidae, Ichneutinae s. l.): a new genus and species of Eocene wasp from the Green River Formation of western North America
A new genus KERATINDOSE CONDITIONER and species of Ichneutinae s.l., Colemanus keeleyorum Fisher, is described from the Eocene Green River Formation in Colorado, USA.Colemanus was placed on a phylogenetic hypothesis using morphological data.Using a parsimony criterion, Colemanus is placed within Proteropini (Ichneutinae s.l.).Reconstructions of wel
Modification of the Outer Cam of Sprags and Performance Analysis of Sprag Clutches
A method for modifying the outer cam of sprags is proposed, the Stereo calculation method of the force of sprags in the overrunning and the engagement condition is studied, and the influence of different modification curves on the contact performance of sprags is analyzed.The results show that the modification of the outer cam of sprags can reduce