Thermal waves observed in semiconductor materials
A study published in Science Advances reports on the unexpected observation of thermal waves in germanium, a semiconductor material, for the first time. This phenomenon may allow a significant improvement in the performance of our electronic devices.....»»
PostgreSQL databases under attack
Poorly protected PostgreSQL databases running on Linux machines are being compromised by cryptojacking attackers. The attack – observed by Aqua Security researchers on a honeypot system – starts with the threat actors brute-forcing access.....»»
Quality control: Neatly arranging crystal growth to make fine thin films
Table salt and refined sugar look white to our eyes, but that is only because their individual colorless crystals scatter visible light. This feature of crystals is not always desirable when it comes to materials for optical and electrical devices, h.....»»
Researchers observe Floquet states in colloidal nanoplatelets driven by visible pulses
Solution-processed semiconductor nanocrystals are also called colloidal quantum dots (QDs). While the concept of size-dependent quantum effects had long been known to physicists, a sculpture of the theory into real nanodimensional objects remained im.....»»
Advanced materials could provide more durable metals for fusion power reactors
For many decades, nuclear fusion power has been viewed as the ultimate energy source. A fusion power plant could generate carbon-free energy at a scale needed to address climate change. And it could be fueled by deuterium recovered from an essentiall.....»»
Neutrons illuminate environmental and biological mysteries
Neutron techniques have long been valued in various scientific fields for their ability to penetrate materials without altering their structure. However, their use in environmental and biological sciences has been limited. Complex systems like soil-w.....»»
New phishing method targets Android and iPhone users
ESET researchers discovered an uncommon type of phishing campaign targeting Android and iPhone users. They analyzed a case observed in the wild that targeted clients of a prominent Czech bank. PWA phishing flow (Source: ESET) This technique is notewo.....»»
New supramolecular polymer shows spontaneous unfolding and aggregation
In polymers, the competition between the folding and aggregation of chains, both at an individual level and between chains, can determine the mechanical, thermal, and conductive properties of such materials. Understanding the interplay of folding and.....»»
Specialized materials could passively control the internal temperature of space habitats
Areas of space have wildly different temperatures depending on whether they are directly in sunlight or not. For example, temperatures on the moon can range from 121 °C during the lunar "day" (which lasts for two weeks), then drop down to -133 °C a.....»»
Researchers shed light on how to make photopolymerization much more efficient
Polymers are materials made out of long, repeating chains of molecules, and it is the interaction between these chains that dictates most of a polymer's physicochemical properties. In accordance with this intuitive understanding of polymers, which da.....»»
Morphable materials: Researchers coax nanoparticles to reconfigure themselves
A view into how nanoscale building blocks can rearrange into different organized structures on command is now possible with an approach that combines an electron microscope, a small sample holder with microscopic channels, and computer simulations, a.....»»
Scientists uncover exciton behavior in van der Waals magnets
A research group led by scientists at the U.S. Department of Energy's (DOE) Brookhaven National Laboratory has uncovered details about the formation and behavior of mobile, microscopic, particle-like objects called "excitons" in a class of materials.....»»
New twist on synthesis technique promises sustainable manufacturing
James Tour's lab at Rice University has developed a new method known as flash-within-flash Joule heating (FWF) that could transform the synthesis of high-quality solid-state materials, offering a cleaner, faster and more sustainable manufacturing pro.....»»
Geophysicists find link between seismic waves called PKP precursors and strange anomalies in Earth"s mantle
For the decades since their discovery, seismic signals known as PKP precursors have challenged scientists. Regions of Earth's lower mantle scatter incoming seismic waves, which return to the surface as PKP waves at differing speeds......»»
New AI tool captures how proteins behave in context
A fish on land still waves its fins, but the results are markedly different when that fish is in water. Attributed to renowned computer scientist Alan Kay, the analogy is used to illustrate the power of context in illuminating questions under investi.....»»
Novel light transport model improves X-ray phase contrast imaging
Researchers at the University of Houston unveiled an advancement in X-ray imaging technology that could provide significant improvements in medical diagnostics, materials and industrial imaging, transportation security and other applications......»»
Recycling can help fill battery materials shortages
Battery manufacturing scrap and spent EV and electronic device batteries provide a ready supply of needed materials.....»»
Current attacks, targets, and other threat landscape trends
In this Help Net Security video, Kendall McKay, Strategic Lead, Cyber Threat Intelligence at Cisco Talos, discusses the trends that Cisco Talos incident response observed in incident response engagements from Q2 2024, which covers April to June. Whil.....»»
Mediterranean Sea temperatures match 2023 records
The temperatures of the Mediterranean Sea in recent days have reached heat records set last summer, the main Spanish maritime research center told AFP Tuesday, with marine heat waves in some places exceeding 30 degrees Celsius......»»
Study reveals urban trees suffer more from heat waves and drought than their rural counterparts
A recently published study in Ecological Applications details how trees in New York City and Boston are more negatively impacted by heat waves and drought than trees of the same species in nearby rural forests. The finding, made by researchers at the.....»»
Advanced microscopy method reveals hidden world of nanoscale optical metamaterials
Scientists from the Department of Physical Chemistry at the Fritz Haber Institute of the Max Planck Society have made a significant discovery in the field of nanotechnology, as detailed in their latest publication in Advanced Materials. Their paper,.....»»