Showing 20 articles starting at article 321
< Previous 20 articles Next 20 articles >
Categories: Chemistry: Thermodynamics, Paleontology: Early Mammals and Birds
Published Engineers use quantum computing to develop transparent window coating that blocks heat, saves energy
(via sciencedaily.com) Scientists have devised a transparent coating for windows that could help cool the room, use no energy and preserve the view.
Published Cooling down solar cells, naturally
(via sciencedaily.com) Too much sun and too much heat can reduce the efficiency of photovoltaics. A solar farm with optimally spaced panels facing the correct direction could cool itself through convection using the surrounding wind. Researchers explored how to exploit the geometry of solar farms to enhance natural cooling mechanisms.
Published High-performance and compact vibration energy harvester created for self-charging wearable devices
(via sciencedaily.com) A research team has developed a microelectromechanical system (MEMS) piezoelectric vibration energy harvester, which is only about 2 cm in diameter with a U-shaped metal vibration amplification component. The device allows for an increase of approximately 90 times in the power generation performance from impulsive vibration. Since the power generation performance can be improved without increasing the device size, the technology is expected to generate power to drive small wearable devices from non-steady vibrations, such as walking motion.
Published Research unearths obscure heat transfer behaviors
(via sciencedaily.com) Researchers have found that boron arsenide, which has already been viewed as a highly promising material for heat management and advanced electronics, also has a unique property. After reaching an extremely high pressure that is hundreds of times greater than the pressure found at the bottom of the ocean, boron arsenide's thermal conductivity actually begins to decrease. The results suggest that there might be other materials experiencing the same phenomenon under extreme conditions.
Published The evolution of Asia's mammals was dictated by ancient climate change and rising mountains
(via sciencedaily.com) A new study compiles data on more than 3,000 species to show how climate and geologic changes across Asia over the last 66 million years have shaped the evolution of the continent's mammals.
Published A life-inspired system dynamically adjusts to its environment
(via sciencedaily.com) The system regulates its own temperature in response to environmental disturbances.
Published Planet's rarest birds at higher risk of extinction
(via sciencedaily.com) A new study finds that bird species with extreme or uncommon combinations of traits face the highest risk of extinction.
Published A nanoscale view of bubble formation
(via sciencedaily.com) A nanoscale view of bubble formation: Using computer simulation, a research team succeeded in modeling the behavior of molecules at the liquid -- gas interface at the nanometer scale, enabling them to describe the boiling process with extreme precision. The findings could be applied to future cooling systems for microprocessors, or to the production of carbon-neutral hydrogen, known as green hydrogen.
Published Great potential for aquifer thermal energy storage systems
(via sciencedaily.com) Aquifer thermal energy storage systems can largely contribute to climate-friendly heating and cooling of buildings: Heated water is stored in the underground and pumped up, if needed. Researchers have now found that low-temperature aquifer thermal energy storage is of great potential in Germany. This potential is expected to grow in future due to climate change.
Published How '2D' materials expand
(via sciencedaily.com) Researchers developed a technique to effectively measure the thermal expansion coefficient of two-dimensional materials. With this information, engineers could more effectively and efficiently use these atomically-thin materials to develop next-generation electronic devices that can perform better and run faster than those built with conventional materials.
Published How does radiation travel through dense plasma?
(via sciencedaily.com) Researchers provide experimental data about how radiation travels through dense plasmas. Their data will improve plasma models, which allow scientists to better understand the evolution of stars and may aid in the realization of controlled nuclear fusion as an alternative energy source.
Published Trial by wind: Testing the heat resistance of carbon fiber-reinforced ultra-high-temperature ceramic matrix composites
(via sciencedaily.com) Carbon fiber-reinforced ultra-high-temperature ceramic (UHTC) matrix composites are extensively used in space shuttles and high-speed vehicles. However, these composites suffer from a lack of oxidation resistance. Recently, researchers tested the heat resistance of these composites at very high temperatures, providing insight into the modifications needed to prevent UHTC degradation. Their findings could have huge implications for the manufacture of space shuttle orbiters.
Published Autonomous crawling soft 'ringbots' can navigate narrow gaps
(via sciencedaily.com) Researchers have created a ring-shaped soft robot capable of crawling across surfaces when exposed to elevated temperatures or infrared light. The researchers have demonstrated that these 'ringbots' are capable of pulling a small payload across the surface -- in ambient air or under water, as well as passing through a gap that is narrower than its ring size.
Published With new heat treatment, 3D-printed metals can withstand extreme conditions
(via sciencedaily.com) A new way to 3D-print metals makes the materials stronger and more resilient in extreme thermal environments. The technique could lead to 3D printed high-performance blades and vanes for gas turbines and jet engines, which would enable improved fuel consumption and energy efficiency.
Published Researchers develop superfast new method to manufacture high-performance thermoelectric devices
(via sciencedaily.com) Aerospace and mechanical engineers have developed a machine-learning assisted superfast new way to create high-performance, energy-saving thermoelectric devices.
Published Plant fibers for sustainable devices
(via sciencedaily.com) Plant-derived materials such as cellulose often exhibit thermally insulating properties. A new material made from nanoscale cellulose fibers shows the reverse, high thermal conductivity. This makes it useful in areas previously dominated by synthetic polymer materials. Materials based on cellulose have environmental benefits over polymers, so research on this could lead to greener technological applications where thermal conductivity is needed.
Published Clear window coating could cool buildings without using energy
(via sciencedaily.com) As climate change intensifies summer heat, demand is growing for technologies to cool buildings. Now, researchers report that they have used advanced computing technology and artificial intelligence to design a transparent window coating that could lower the temperature inside buildings, without expending a single watt of energy.
Published More than one way to build a black bird
(via sciencedaily.com) For a species of flycatcher in the remote Solomon Islands, scientists have so far found at least two genetic pathways leading to the same physical outcome: all-black feathers. This change was no random accident. It was a result of nature specifically selecting for this trait.
Published Looking to sea urchins for stronger ceramic foams
(via sciencedaily.com) New research has unlocked a mystery in the porous microstructures of sea urchin exoskeletons that could lead to the creation of lightweight synthetic ceramics.
Published Scientists discover material that can be made like a plastic but conducts like metal
(via sciencedaily.com) Scientists have discovered a way to create a material that can be made like a plastic, but conducts electricity more like a metal. The research shows how to make a kind of material in which the molecular fragments are jumbled and disordered, but can still conduct electricity extremely well. This goes against all of the rules we know about for conductivity.