First India, now LA.
It’s taking a new approach to road construction.
Category: materials – Page 254
Potential for small science missions … “Small satellites will play a crucial role in science and exploration, as well as providing communications and navigation infrastructure to support returning humans to the Moon,” Rocket Lab head honcho Peter Beck said. “They play a vital role as pathfinders to retire risk and lay down infrastructure for future missions. We think this could be useful for CubeSat science around the Moon or possibly communications relay capability on the cheap.” (submitted by 3ch0 and ADU)
Firefly considering AR1 engine for its Beta rocket. Firefly Aerospace has said it is collaborating with engine-maker Aerojet Rocketdyne to increase the performance of its upcoming Alpha launch vehicle, and the company is also considering Aerojet Rocketdyne’s AR1 engine for a future launch vehicle, SpaceNews reports. In a statement, Firefly CEO Tom Markusic praised the AR1 as an engine well suited for Beta but stopped short of saying the engine’s selection is a done deal.
How far along is AR1 really? … Markusic: “Aerojet Rocketdyne’s AR1 engine, which incorporates the latest advances in propulsion technology, materials science, and manufacturing techniques, is incredibly well-suited to power Beta given its cost-effective, high-performance capabilities.” It is not at all clear to us how close Aerojet is to completing and qualifying the AR1 engine. It also seems like Firefly should get Alpha up and running before it worries too much about the larger Beta rocket. (submitted by Unrulycow)
Laser radiation pressure is a basis of numerous applications in science and technology such as atom cooling, particle manipulation, material processing, etc. This light force for the case of scalar beams is proportional to the intensity-weighted wavevector known as optical current. The ability to design the optical current according to the considered application brings new promising perspectives to exploit the radiation pressure. However, this is a challenging problem because it often requires confinement of the optical current within tight light curves (circuits) and adapting its local value for a particular task. Here, we present a formalism to handle this problem including its experimental demonstration. It consists of a Nature-inspired circuit shaping with independent control of the optical current provided by a new kind of beam referred to as polymorphic beam. This finding is highly relevant to diverse optical technologies and can be easily extended to electron and x-ray coherent beams.
In recent years, cosmologists peering back to the very dawn of our Universe have discovered something peculiar. A whole bunch of supermassive black holes — in a time thought way too early for such massive objects to have formed.
Exactly how they got to be so freaking huge so quickly is a heck of a puzzle — but a new surprise discovery might have delivered an answer. The disc of dust and gas around a supermassive black hole is moving in such a way that it’s slurping down material faster than it would normally.
That means it’s gaining mass faster than expected — which in turn could explain what happened in the earliest days of our Universe.
Shneel Malik, a Barlett doctoral candidate, has created Indus — a modular wall system that is created to clean water polluted using dyes and chemicals with the help of ceramic tiles and algae. The ceramic tiles used to create this modular wall is layered with microalgae and seaweed-based hydrogel.
Priority to US198325
Posted in materials
This could lead to euclidean geometry devices.
A system for transmission of information using a curl-free magnetic vector potential radiation field. The system includes current-carrying apparatus for generating a predominantly curl-free magnetic vector potential field coupled to apparatus for modulating the current applied to the field generating apparatus. Receiving apparatus includes a detector with observable properties that vary with the application of an applied curl-free magnetic vector potential field. Analyzing apparatus for determining the information content of modulation imposed on the curl-free vector potential field is coupled to the detector. The magnetic vector potential field can be established in materials that are not capable of transmitting more common electromagnetic radiation.
Image Credits: Thinkstock
Materials scientists are constantly working on developing stronger and better materials for various industries. Spider silk, diamond, graphene, and nanotubes have all been proved to be stronger than steel in one respect or another. Now, certain types of plastics join this list.
The following article looks at three research findings in the field of plastics.
Scientists from Tokyo Metropolitan University have created a new layered superconducting material with a conducting layer made of bismuth, silver, tin, sulfur and selenium. The conducting layer features four distinct sublayers; by introducing more elements, they were able to achieve unparalleled customizability and a higher “critical temperature” below which superconductivity is observed, a key objective of superconductor research. Their design strategy may be applied to engineer new and improved superconducting materials.
Once an academic curiosity, superconductors are now at the cutting edge of real technological innovations. Superconducting magnets are seen in everyday MRI machines, particle accelerators for medical treatments, not to mention the new Chuo Shinkansen maglev train connecting Tokyo to Nagoya currently being built. Recently, a whole new class of “layered” superconducting structures have been studied, consisting of alternate layers of superconducting and insulating two-dimensional crystalline layers. In particular, the customizability of the system has garnered particular interest in light of its potential to create ultra-efficient thermoelectric devices and a whole new class of “high temperature” superconducting materials.
A team led by Associate Professor Yoshikazu Mizuguchi from Tokyo Metropolitan University recently created a bismuth sulfide based layered superconductor; their work has already revealed novel thermoelectric properties and an elevated “critical temperature” below which superconductivity is observed. Now, working with a team from the University of Yamanashi, they have taken a multi-layered version of the system, where the conducting layer consists of four atomic layers, and begun swapping out small proportions of different atomic species to probe how the material changes.