Articles tagged with Heat Radiation
Urban heat islands are caused by cities trapping more heat than surrounding areas due to their structure, affecting energy consumption and air quality. Researchers studied 50 cities and found that well-organized cities with straight streets retain more heat at night, leading to increased energy bills in hot climates.
Researchers have created a graphene-based radiation detector with a fast response time and the ability to work over a wide range of temperatures. The device exploits graphene's thermoelectric properties, generating an electric field that provides a direct measurement of radiation.
Researchers at USC Viterbi School of Engineering have developed a new material to self-regulate the temperature of satellites, reducing on-board power reserves and increasing lifespan. The hybrid structure of silicon and vanadium dioxide performs 20 times better than current semiconductors in maintaining optimal satellite temperatures.
Researchers create a new type of alloy with a hexagonal close-packed structure using common metals and high pressure. The resulting material exhibits unique properties, including higher strength-to-weight ratio, better heat resistance, and improved durability.
The TW Hydrae system shows a prominent gap that is unlikely to be caused by an actively accreting protoplanet. Instead, researchers attribute the feature to photoevaporation, which heats gas and allows it to fly away from the disk. This process may disperse the disk before planets can form.
Researchers create a cooling textile that utilizes infrared radiation, allowing for efficient heat dissipation and reducing the need for air conditioning. The material is made from polyethylene and has various characteristics desirable in clothing material.
A new type of portable infrared detector has been developed, operating at room temperature, enabling efficient and compact detection systems. The detector uses an 8x8 array of pixels to sense specific wavelengths of infrared light and convert them into electrical signals.
Researchers have discovered a new metamaterial that radiates heat in specific directions, making it ideal for use with thermophotovoltaic cells. This breakthrough could lead to highly efficient cells that harvest heat from surroundings and convert it into electricity.
The composite material emits light and heat when exposed to specific wavelengths of radiation and can be customized to have specific mechanical characteristics. It holds promise for biomedical imaging, drug delivery, and therapeutic treatments.
At the nanoscale, heat radiates from one surface to another in a vacuum 10,000 times faster than expected. This discovery has significant applications in next-generation information storage and devices that convert heat into electricity.
Scientists have developed a hybrid solar-energy system that harnesses the full spectrum of sunlight by pairing a photovoltaic cell with polymer films. The system produces a voltage over 20% higher than other hybrid systems and can operate an LED lamp and electrochromic display.
Heat flow between materials separated by less than a nanometer occurs not via radiation or conduction, but through phonon tunneling. Researchers developed a unified framework to calculate heat transport at finite gaps, explaining how phonons can
Researchers at NCEPU propose a novel solar CPV/CSP hybrid system that combines electricity generation with heat utilization. The system improves overall solar-to-electricity efficiency by increasing the useful peripheral low-concentration radiation, resulting in high-efficiency solar power generation.
The NISTAR instrument on NOAA's DSCOVR spacecraft will measure the Earth's radiation budget by monitoring absolute irradiance over the entire sunlit face of the planet. This information can be used to understand the effects of human activities and natural phenomena on climate change.
The new coating material radiates infrared light directly into space while also reflecting sunlight, resulting in cooler buildings that require less air conditioning. The technology has the potential to reduce energy consumption and meet skyrocketing demand for cooling in urban areas.
A new study reveals that urbanization reduces convection efficiency by 58 percent in wetter climates, leading to a significant rise in daytime temperatures. This finding challenges the long-held belief that vegetation loss is the primary cause of the urban heat island effect.
Researchers propose using shale formations as a potential solution for storing spent nuclear fuel due to their impermeable properties. This would minimize the risk of water contamination and ensure safe storage for tens or hundreds of thousands of years.
Researchers found that fur coats and down feathers derive their insulating power from an optical mechanism involving the scattering of infrared light. This discovery could lead to improved building insulation and the development of new types of ultrathin insulation.
Scientists at Vienna University of Technology experimentally confirmed a new theory of heat radiation for ultra-thin optical fibers, showing that smaller objects can't radiate efficiently. This discovery is crucial for nano-devices and aerosol physics.
Researchers develop unique technology that keeps devices working in the presence of ionizing radiation, suitable for space applications and control systems, and overcome current radiation-resistant technologies' drawbacks. The new logic gates perform logical operations and can be used to build circuits such as adders and multiplexers.
Scientists quantify differences between microwave-induced and conventional heating in liquid glycerol samples, finding increased mobility and reactivity at low frequencies. The type of heating used has a limited impact on molecular mobility and reactivity at high temperatures.
Researchers at the University of Washington and Kettering University have developed a tool to optimize grocery store display case designs, reducing energy consumption by up to 15%. The team tested various air curtain speeds, angles, and factors to minimize warm air infiltration into chilled compartments.
Researchers have developed a method to compute a tiny temperature-dependent error source in atomic clocks with unprecedented accuracy. This correction could represent a significant step towards creating an atomic clock with precision equivalent to one second of error every 32 billion years.
The James Webb Space Telescope's five-layer sunshield was subjected to a series of tests using a 1/3-scale model to verify its ability to block and redirect solar heat. The experiments aimed to match computer models with test data, ensuring accurate thermal performance predictions for the full-size sunshield.
Dartmouth researchers have proposed a new method to create tiny quantum-sized black holes in the laboratory, allowing for better understanding of Hawking radiation. The SQUID-based setup enables exploration of analogue quantum gravitational effects and may be more straightforward for detecting Hawking radiation.
Researchers developed a new method to measure heat transport in rocks, revealing that rock conductivity varies strongly with temperature. The technique, laser-flash analysis, provides more accurate data on heat transport than conventional methods.
The NASA-designed Sunshield is made of a super-tough polymer-based film that can block the sun's energy while maintaining structural integrity. The telescope needs to be extremely cold to observe distant galaxies and stars in infrared light, and the Sunshield plays a crucial role in achieving this.
Tumor cells can be made more sensitive to hyperthermia-enhanced radiation therapy by inhibiting telomerase, a protective enzyme. Researchers at Washington University School of Medicine found that moderately increasing heat activates telomerase in tumor cells.
The NASA SORCE mission is tracking regional variations in the sun's warming impact on Earth, with possible implications for global climate patterns. The study found that while the sun's brightness affects Earth's temperature modestly, regional temperature changes can vary by a factor of eight.
Researchers discovered that carbon nanotubes can repair themselves by moving blemishes across the surface of the material, sewing up larger holes as they go. This self-repair mechanism allows the nanotube to retain its strength despite severe damage, but comes with a price: releasing energy and mass in the form of gaseous carbon atoms.
Scientists at Johns Hopkins believe that heat therapy can selectively target and kill cancer cells by disrupting their nuclear protein scaffolding. Preliminary research suggests that this approach could be effective in treating solid tumors, with the goal of improving cure rates.
Researchers found that magnesiowüstite, a common mineral in the lower mantle, absorbs infrared light when compressed to extreme pressures. This suggests that radiation may not play a significant role in heat flow near Earth's core.
Scientists at NIST have developed a highly accurate gamma ray detector, capable of pinpointing emissions signatures of specific atoms with 10 times the precision of conventional sensors. This technology may aid in verifying inventories of nuclear materials and detecting radioactive contamination in the environment.
A new analysis of global satellite data reveals that a warming climate has led to fewer but stronger storms in mid-latitudes, resulting in contrasting cooling and warming effects on the atmosphere. These storm changes affect the Earth's radiation and precipitation fields, leading to increased precipitation in the northern mid-latitudes.
A new study confirms the Earth's energy is out of balance, with more energy absorbed from the sun than emitted back to space. The imbalance, measured at 0.85 watts per meter squared, will cause an additional 0.6 degrees Celsius warming by the end of this century.
The Wide Field Camera (WFCAM) is the world's most powerful infrared survey camera, detecting objects one hundred times fainter than existing surveys. It has captured stunning images of the Orion nebula, revealing thousands of young stars and dramatic clouds of gas and dust.
Researchers have discovered that Heat shock protein (Hsp) 70.1 and 70.3 can be used to increase cancer cells' vulnerability to radiation treatments, offering a new treatment window for cancer patients. The proteins were found to interact with telomerase, an enzyme that helps maintain the telomeres at the ends of chromosomes.
The Max Planck Institute for Radioastronomy has determined the sizes of four of the largest and most distant minor planets in our solar system. The diameters range between 700 and 1200 km, providing new insights into the Kuiper belt's structure and potential origin of planetary systems.
MIT scientists develop polymer fibers with a 'perfect mirror' structure, enabling reflection of light across various wavelengths and potential applications in optical textiles. The breakthrough utilizes dielectric materials to control the fiber's optical properties.
Scientists observed less cloud cover blocking incoming radiation and trapping outgoing heat in the tropics. This led to more sunlight entering and heat escaping, contradicting current climate models' predictions.