Cooling stars could shine some light on the nature of dark matter. Certain types of stars are cooling faster than expected. That may signal the presence of hypothetical particles called axions. Such particles have been proposed to be dark matter, the unknown substance that makes up most of the...
Presuming weak collisional interactions to exchange the kinetic energy between dark matter and baryonic matter in a galaxy cluster, we re-examine the effectiveness of this process in several 'cooling flow' galaxy clusters using available X-ray observations and infer an upper limit on the heavy dark...
However, simple estimates based on the velocity of particulate matter that only depend on climate conditions (i.e., wind speed) and leaf area can easily be added (Pace and Grote 2020). Further improvements could then include, for example, that the stomatal conductance interacts with particle ...
module. The deposition of the particles on the P.V. surface is very strong in the desert climate. Due to dust particles, solar output is decreased by nearly 40%. 2.4. Effect of humidity The air humidity means the amount of water content in the air. The relative humidity is often used ...
According to conventional wisdom, a system placed in an environment with a different temperature tends to relax to the temperature of the latter, mediated by the flows of heat or matter that are set solely by the temperature difference. It is becoming clear, however, that thermal relaxation is...
This paper developed XJCT-3D, a simulation software for cooling tower wet plume dispersion. By coupling it with the Open GIS component Dotspatial, we have achieved geospatial visual representation of the calculation results, which has solved the problems
Efficient cooling of trapped charged particles is essential to many fundamental physics experiments 1,2 , to high-precision metrology 3,4 and to quantum technology 5,6 . Until now, sympathetic cooling has required close-range Coulomb interactions 7,8 , but there has been a sustained desire to ...
… As for increasing global concentrations of particulate matter, the opposite is true. Due to the backscattering characteristics of the particles an increase in the albedo occurs which produces a decrease in average global surface temperature. … Since it had been thought that the two effects ...
The use of dark infrared reflective paint on the surface of the asphalt along with hollow ceramic particles reduced the thermal conductivity and increased reflectance to 81%. Sha et al. (2017) used a special pigment in coating layers made of titanium dioxide as a solar heating reflective ...
Fundamental insights into the structure of matter and the nature of its elementary constituents have been obtained using beams of charged particles. The use of time-varying electromagnetic fields to produce sustained acceleration was pioneered in the 1930s12,13,14. Since then, high-energy and high-...