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World’s 1st nuclear fusion-powered electric propulsion drive unveiled
A concept that began as a doodle at a conference years ago is now becoming a reality.
RocketStar Inc. has showcased its advanced nuclear-based propulsion technology called the FireStar Drive.
It is said to be the world’s first electric device for spacecraft propulsion boosted by nuclear fusion.
Generation of a Focused THz Vortex Beam from a Spintronic THz Emitter with a Helical Fresnel Zone Plate
Similar to optical vortex beams, terahertz (THz) vortex beams (TVBs) also carry orbital angular momentum (OAM). However, little research has been reported on the generation of TVBs. In this paper, based on the detour phase technique, we design a series of spintronic terahertz emitters with a helical Fresnel zone plate (STE-HFZP) to directly generate focused TVBs with topological charges (TCs) of l = ±1, ±2 and ±3, respectively. The STE-HFZP is a hybrid THz device composed of a terahertz emitter and a THz lens, and it has a high numerical aperture (NA), achieving subwavelength focal spots. Its focus properties are surveyed systemically through accurate simulations. This STE-HFZP can also generate focused TVBs with higher order TCs.
New method minimizes alignment errors in microlens array production
Double-sided microlens arrays (DSMLAs) play a crucial role in improving the performance of optical devices, supporting applications from advanced imaging systems to laser beam homogenization. However, traditional manufacturing methods often struggle with alignment errors that diminish the functionality and efficiency of these arrays.
In a first, MRI-compatible surgical robot enters human clinical trials
AiM’s MRI robot successful in trial:
A recent cadaver trial demonstrated the success of AiM’s MRI-guided robot in deep brain stimulation, marking a milestone in neurosurgery.
Euryphysics: a (somewhat) new conceptual model of mind, reality and psi
Awodey, Steve, Álvaro Pelayo, Michael A. Warren (2013). Voevodsky’s Univalence Axiom in homotopy type theory. Notices of the American Mathematical Society.
Bakhtin, Mikhail (1984). Bakhtin’s analysis of Dostoevsky. Problems of Dostoevsky’s Poetics. U. Minn. Press.
Carpenter, James (2012). First Sight: ESP and Parapsychology in Everyday Life. Rowan & Littlefield.