More EM Drive news

I have been following the news on the EM drive(here and here), a potential rocket/spaceship drive that produces thrust without expelling mass. According to my understanding, and Newton’s Third Law of Thermodynamics, this should not happen.

The math is way over my head, but these guys have come up with a possible explanation:


Scientific literature refers to a strange observed phenomenon, “impossible” according to traditional physics, looking at the experimental feasibility of the so called “EM Drive”. The authors have called it an Impulsive Thrust from a Closed Radio-Frequency Cavity in Vacuum. Here we present a possible explanation for the observed thrust based on the conceptual framework of Eurhythmic Physics, a kind of pilot-wave theory aiming at bridging the gap between quantum and macroscopic systems. Applied to the present system, a generalized guidance condition could explain the claimed absence of reaction of the material of the drive on the enclosed fields.

Wednesday’s derm consult

A 2 year old male patient presents with a red, swollen thumb with a dystrophic nail for 9 months, with no improvement. Antibiotics have not helped. He is not a thumb-sucker. All other nails are normal.

Parakeratosis pustulosa is a nail disorder that occurs almost exclusively in children. In most cases the disease is limited to one nail, usually the thumb or the index finger, and presents with distal onycholysis, fingertip desquamation, and mild subungual hyperkeratosis. Parakeratosis pustulosa begins with an acute eczematous inflammation of the periungual skin, causing hyperkeratosis and thickening of the free edges of the nail. Scaling is more marked than pustulation. The course is often protracted and recurrences are the rule. Spontaneous regression may occur after puberty.