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Новости за 12.02.2020

Student: ‘I feared for my life’ as officer put in chokehold

TheRepublic.com 

CAMDEN, Ark. — Student Dekyrion Ellis said he feared for his life when a police officer placed him in a chokehold while restraining him following a fight that broke out in an Arkansas high school. Camden Police Officer Jake Perry, who’s white, was caught on video Monday morning with both his arms wrapped around Dekyrion’s

New electrode design may lead to more powerful batteries

Energy-daily.com 

Boston MA (SPX) Feb 04, 2020 - New research by engineers at MIT and elsewhere could lead to batteries that can pack more power per pound and last longer, based on the long-sought goal of using pure lithium metal as one of the battery's two electrodes, the anode.

The new electrode concept comes from the laboratory of Ju Li, the Battelle Energy Alliance Professor of Nuclear Science and Engineering and professor of materials science and engineering. It is described in the journal Nature, in a paper... Читать дальше...

Closely spaced hydrogen atoms could facilitate superconductivity in ambient conditions

Energy-daily.com 

Oak Ridge TN (SPX) Feb 04, 2020 - An international team of researchers has discovered the hydrogen atoms in a metal hydride material are much more tightly spaced than had been predicted for decades - a feature that could possibly facilitate superconductivity at or near room temperature and pressure.

Such a superconducting material, carrying electricity without any energy loss due to resistance, would revolutionize energy efficiency in a broad range of consumer and industrial applications.

Читать дальше...

Making high-temperature superconductivity disappear to understand its origin

Energy-daily.com 

Upton NY (SPX) Feb 04, 2020 - When there are several processes going on at once, establishing cause-and-effect relationships is difficult. This scenario holds true for a class of high-temperature superconductors known as the cuprates. Discovered nearly 35 years ago, these copper-oxygen compounds can conduct electricity without resistance under certain conditions.

They must be chemically modified ("doped") with additional atoms that introduce electrons or holes (electron vacancies) into the copper-oxide... Читать дальше...

Static electricity as strong as lightening can be saved in a battery

Energy-daily.com 

Pohang, South Korea (SPX) Feb 07, 2020 - Static electricity shock which occurs more often in winter is unpleasant. When two different objects are in repeated contact, it causes friction which then creates static electricity.

This can be found easily in our everyday actions and it is very annoying even between the lovers. In fact, there is no electric current flowing in static electricity but tens of thousands of volts occurs, equal to the power of lightening. Then, can we collect static electricity for use? Читать дальше...



Scientists offer an inkjet printing technology to make compact, flexible battery elements

Energy-daily.com 

Saint Petersburg, Russia (SPX) Feb 07, 2020 - A group of St. Petersburg scientists has proposed a new method of manufacturing electrodes for lithium-ion batteries that power laptops, smartphones and tablets. The researchers have shown that these elements can be printed on an inkjet printer, which will reduce the electrodes' thickness by 10-20 times and open up new possibilities for manufacturers of compact electronics. Their article has been published in the journal Energy Technology.

How to... Читать дальше...

New droplet-based electricity generator: A drop of water generates 140V power, lighting up 100 LED bulbs

Energy-daily.com 

Hong Kong (SPX) Feb 07, 2020 - Generating electricity from raindrops efficiently has gone one step further. A research team led by scientists from the City University of Hong Kong (CityU) has recently developed a droplet-based electricity generator (DEG), featured with a field-effect transistor (FET)-like structure that allows for high energy-conversion efficiency and instantaneous power density increased by thousands times compared to its counterparts without FET-like structure. This would help... Читать дальше...

Ornge helicopter targeted by laser on approach to Ottawa-area hospital

Ottawa Citizen 

A green laser beam struck an air ambulance as it approached an Ottawa-area hospital over the weekend. “Shining a laser at an aircraft is not only illegal, it is extremely dangerous and puts the safety of our patients, crew and aircraft at risk,” Ornge said Tuesday. The helicopter was transferring a patient when the Ottawa-based […]

New argument presented to highlight the axion nature of dark matter

Spacedaily.com 

Kazan, Russia (SPX) Feb 04, 2020 - According to the hypothesis, axionic dark matter, provoking structural rearrangement in compact stars with a strong magnetic field, can protect them from a catastrophic loss of magnetic energy, but at the same time allows such objects to rotate abnormally fast.

"Dark matter is a cosmic substance that does not directly interact with photons, and all information about it was obtained by astronomers only indirectly, as a result of gravitational lensing of light... Читать дальше...

Scientists complete ELM Survey, discover 98 double white dwarfs

Spacedaily.com 

Boston MA (SPX) Feb 05, 2020 - Scientists at the Center for Astrophysics | Harvard and Smithsonian (CfA) have completed the Extremely Low Mass - also known as ELM - spectroscopic study of white dwarf stars in the Sloan Digital Sky Survey (SDSS). In process for more than a decade, the completed survey discovered 98 detached double white dwarf binaries.

"We targeted candidate low mass white dwarf stars and found that they are all ultra-compact binaries. It makes sense," said Dr. Warren Brown, astronomer at CfA and lead author on the survey. Читать дальше...

ALMA catches beautiful outcome of stellar fight

Spacedaily.com 

Munich, Germany (SPX) Feb 06, 2020 - Astronomers using the Atacama Large Millimeter/submillimeter Array (ALMA), in which ESO is a partner, have spotted a peculiar gas cloud that resulted from a confrontation between two stars. One star grew so large it engulfed the other which, in turn, spiralled towards its partner provoking it into shedding its outer layers.

Like humans, stars change with age and ultimately die. For the Sun and stars like it, this change will take it through a phase where... Читать дальше...

Astronomers reveal rare double nucleus in nearby 'Cocoon Galaxy'

Spacedaily.com 

Ames IA (SPX) Feb 06, 2020 - The so-called "Cocoon Galaxy" not only has a unique shape, it has a rare double-nucleus structure, astronomers report in a new paper.

After studying data from optical and radio telescopes based on the ground and in space, a team of astronomers determined that a galaxy known as NGC 4490 (and nicknamed the "Cocoon Galaxy" because of its shape) has "a clear double nucleus structure," according to their paper.

Читать дальше...

Astronomers discover unusual monster galaxy in the very early universe

Spacedaily.com 

Maunakea HI (SPX) Feb 07, 2020 - An international team of astronomers led by scientists at the University of California, Riverside, has found an unusual monster galaxy that existed about 12 billion years ago, when the universe was only 1.8 billion years old, or 13 percent of its current age of 13.8 billion years.

Using W. M. Keck Observatory on Maunakea in Hawaii, the team found that the galaxy, dubbed XMM-2599, formed stars at a high rate and then died. Why it suddenly stopped forming stars is unclear. Читать дальше...


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