Can you imagine that the light coming through your window not only illuminates your spaces but also generates the energy you need to turn on the television.
Category: energy – Page 2
What Are the Interferences to Radio Waves?
Radio interference refers to the phenomenon that occurs during radio communication, where some electromagnetic energy enters the receiving system or channel through direct or indirect coupling, resulting in a decrease in the quality of useful received signals, information errors or loss, or even blocking communication.
Radio interference signals are mainly electromagnetic energy that enters the receiving device channel or system through direct or indirect coupling. It can affect the reception of received signals required for radio communication, resulting in performance degradation, quality deterioration, information errors or loss, and even blocking the communication. Therefore, it is generally said that the fact that useless radio signals cause the quality of useful radio signals to decrease or damage is called radio interference.
Previously we have an article about t he analysis and solutions of antenna interference in satellite communication, including polarization interference, adjacent frequency interference, forwarding interference, etc. Please click here to read the full article. Today we will focus on analyzing how to interfere with radio from several aspects, such as physical obstacles, weather conditions, electromagnetic interference (EMI), solar activity, atmosphere, and frequency bands. For example, heavy rain can reduce the signal strength of 12 GHz by 20 dB per kilometer. Solutions include using higher frequencies to obtain clearer paths or placing antennas to avoid reflective surfaces and interference sources. Please go ahead for further details.
Sunlight-powered catalyst sets new standard for hydrogen peroxide production efficiency
Hydrogen peroxide (H2O2) packs so much chemical energy into a small space that it is powerful enough to fuel rockets. But this same ability to concentrate energy also makes hydrogen peroxide useful for more earthly energy applications, such as powering fuel cells. It also holds promise as a green and sustainable energy source: when hydrogen peroxide releases its stored energy, the main byproduct is simply water.
Physicists create stable, ‘breathing’ solitons in settings without energy conservation
Solitonic waves—waves that keep their shape and direction of motion for a long time—have intrigued physicists for almost two centuries. In real-world circumstances, these waves eventually die out due to energy loss. A team of UvA physicists have now discovered how a particular type of interaction can be used to create very stable solitons, even in circumstances where energy is not conserved.
In 1834, John Scott Russell observed an unusual phenomenon in the Union Canal in Scotland. After a moving boat had come to a halt, the water wave that the boat had caused continued moving through the canal, keeping virtually the same speed and the same shape.
It took more than half a century, until the work of Dutch mathematicians Diederik Korteweg and Gustav de Vries in 1895, before the phenomenon that Russell observed had been explained in all its mathematical detail. What Russell had seen was a “solitary wave,” a phenomenon now better known as a soliton.
3D-printed gyroidal solid oxide cells offer lighter, more compact energy solutions
Over the past decades, energy engineers have been developing a wide range of new technologies that could power electronic devices, robots and electric vehicles more efficiently and reliably. These include solid oxide cells (SOCs), electrochemical devices that can operate in two different modes, as fuel cells or as electrolyzers.
US reactor turns cow manure into jet fuel at fraction of normal cost
US startup turns cow manure into jet fuel in a move to reshape renewable energy.
Interestingly, the reactor does it all at just 1/100th the capital cost of conventional systems. The dramatic reduction in capital expenditure could make on-site fuel production a realistic prospect for individual farms.
Over 20,000 large livestock farms in the U.S. produce nearly a trillion pounds of manure annually, but less than 6% capture the biogas from this waste.
“Farmers in the U.S. and around the world are sitting on an untapped goldmine. We’re giving them the ability to turn waste into a profitable product that airlines desperately need,” said Dr. Stephen Beaton, CEO and Founder of Circularity Fuels, in the press release.
Skyrmions as Active Matter
Pairs of skyrmions—tiny whirlpools that emerge in some magnetic materials—might be able to self-propel, a behavior reminiscent of that of active-matter systems such as motile bacteria.
In nature, the collective motion of birds and fish can generate impressive dynamics and unique structures, as seen in flocks of starlings and shoals of sardines. The science of active matter studies such complex behaviors across a wide range of scales and origins [1], and it has attracted growing interest over the past three decades. Active matter encompasses not only living things but also inanimate objects. Examples include active colloids [2] and active liquid crystals [3] that are able to self-propel—that is, move by themselves powered by internal energy sources. Now Clécio de Souza Silva and colleagues at the Federal University of Pernambuco in Brazil have suggested an intriguing addition to the active-matter catalog: coupled pairs of skyrmions, whirlpool-like spin arrangements that emerge in certain magnetic materials.
Solar-powered photoelectrochemical system converts nitrate in wastewater into high-value ammonia
A research team affiliated with UNIST has unveiled a technology that transforms nitrates found in wastewater into ammonia, a vital chemical and promising energy carrier, without carbon emissions. This advancement not only offers a sustainable method for ammonia production but also contributes to wastewater purification efforts.