Astronomers from the Stanford University in California have performed joint X-ray and optical observations of a massive “spider” pulsar designated PSR J2215+5135. Results of the observational campaign, presented in a paper published May 22 on the pre-print server arXiv, provide more hints into the nature of this pulsar.
Researchers at the University of California, Los Angeles (UCLA) have achieved a significant milestone in optical imaging technology. A new all-optical complex field imager has been developed, capable of capturing both amplitude and phase information of optical fields without the need for digital processing.
Since Nobel-Prize-winning physicist Frank Wilczek first proposed his theory over a decade ago, researchers have been on the search for elusive “time crystals”—many-body systems composed of particles and quasiparticles like excitons, photons, and polaritons that, in their most stable quantum state, vary periodically in time.
Wilczek’s theory centered around a puzzling question: Can the most stable state of a quantum system of many particles be periodic in time? That is, can it display temporal oscillations characterized by a beating with a well-defined rhythm?
It was quite rapidly shown that time crystal behavior cannot occur in isolated systems (systems which do not exchange energy with the surrounding environment). But far from closing the subject, this disturbing question motivated scientists to search for the conditions under which an open system (i.e., one that exchanges energy with the environment) may develop such time crystal behavior.
Biomarkers are small molecules of interest to researchers, because they can indicate underlying diseases, often even before symptoms even appear. However, detecting these markers can be challenging as they are often present in very low quantities, especially in the early stages of a disease. Traditional detection methods, while effective, usually require expensive components like prisms, metal films, or optical objectives.
In a recent paper published in Applied Physics Letters, researchers at the University of Illinois Urbana-Champaign have unveiled a novel approach to detecting low concentrations of biomarkers that paves the way for biodetection technology that is simple to use, highly sensitive, and surprisingly affordable.
“The goal of this technology is early diagnostics, to be able to detect molecules associated with diseases at very low concentrations, sometimes a few molecules per millions, very early on,” said Seemesh Bhaskar, a postdoctoral researcher in Brian Cunningham’s lab and first author on the study. “Looking for very small concentrations of micro-RNA, circulating tumor DNA, and exosomes, for example, can help determine whether a patient will develop cancer one or two years down the line.”
On June 3, an alignment of six planets—Mercury, Mars, Jupiter, Saturn, Uranus, and Neptune —will be visible shortly before sunrise from dark, high vantage points with minimal light pollution. This rare event requires optical aids to view all planets.
Stargazers will have an incredible opportunity to look for six planets in Earth’s solar system on June 3. Mercury, Mars, Jupiter, Saturn, Uranus, and Neptune will appear, from some dark, weather-free vantage points on Earth, to form a more-or-less straight line in the night sky – but it’ll take some optical assistance to see them all.
The alignment is a bit of an illusion, astronomers are quick to point out, given the widely varying elliptical path of each planet’s orbit around the Sun. But the uncommon arrangement could prove captivating indeed – if local weather does not interfere.
NASA ’s X-59 quiet supersonic aircraft project has reached a critical milestone with the completion of the Flight Readiness Review, paving the way for future flight testing.
NASA has advanced the airworthiness verification of its quiet supersonic X-59 aircraft with the completion of a milestone review that will allow it to progress toward flight.
An independent Flight Readiness Review board comprising experts from throughout NASA has concluded a detailed evaluation of the X-59 project team’s safety strategies for the public and staff during both ground and flight testing. The board meticulously examined the team’s assessment of potential hazards, focusing on safety and risk identification.
Using the James Webb Space Telescope, University of Copenhagen researchers have become the first to see the formation of three of the earliest galaxies in the universe, more than 13 billion years ago.
For the first time in the history of astronomy, researchers at the Niels Bohr Institute have witnessed the birth of three of the universe’s absolute earliest galaxies, somewhere between 13.3 and 13.4 billion years ago.
The discovery was made using the James Webb Space Telescope, which brought these first ‘live observations’ of formative galaxies down to us here on Earth.
MIT scientists found that metals like copper can become stronger when heated and impacted at high velocities, challenging traditional views and potentially enhancing materials for extreme environments like space and high-speed manufacturing.
Metals get softer when they are heated, which is how blacksmiths can form iron into complex shapes by heating it red hot. And anyone who compares a copper wire with a steel coat hanger will quickly discern that copper is much more pliable than steel.
But scientists at MIT have discovered that the opposite happens when metal is struck by an object moving at a super high velocity: The hotter the metal, the stronger it is. Under those conditions, which put extreme stress on the metal, copper can actually be just as strong as steel. The new discovery could lead to new approaches to designing materials for extreme environments, such as shields that protect spacecraft or hypersonic aircraft, or equipment for high-speed manufacturing processes.
Lighting a gas grill, getting an ultrasound, using an ultrasonic toothbrush ⎯ these actions involve the use of materials that can translate an electric voltage into a change in shape and vice versa.
Known as piezoelectricity, the ability to trade between mechanical stress and electric charge can be harnessed widely in capacitors, actuators, transducers, and sensors like accelerometers and gyroscopes for next-generation electronics. However, integrating these materials into miniaturized systems has been difficult due to the tendency of electromechanically active materials to ⎯ at the submicrometer scale, when the thickness is just a few millionths of an inch ⎯ get “clamped” down by the material they are attached to, which significantly dials down their performance.
Rice University researchers and collaborators at the University of California, Berkeley have found that a class of electromechanically active materials called antiferroelectrics may hold the key to overcoming performance limitations due to clamping in miniaturized electromechanical systems. A new study published in Nature Materials reports that a model antiferroelectric system, lead zirconate (PbZrO3), produces an electromechanical response that can be up to five times greater than that of conventional piezoelectric materials even in films that are only 100 nanometers (or 4 millionths of an inch) thick.
Researchers at Cambridge have shown that the Third Thumb, a robotic prosthetic, can be quickly mastered by the public, enhancing manual dexterity. The study stresses the importance of inclusive design to ensure technologies benefit everyone, with significant findings on performance across different demographics.
Cambridge researchers demonstrated that people can rapidly learn to control a prosthetic extra thumb, known as a “third thumb,” and use it effectively to grasp and handle objects.
The team tested the robotic device on a diverse range of participants, which they say is essential for ensuring new technologies are inclusive and can work for everyone.
