clhs sciblog

Musings on current happenings in science from our little slice of the world.

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Doubly-excited electrons reaches new energy states.

January 6, 2020 by rosskt · General Science

Scientists have now made commercially available lasers capable of producing photons that carry enough energy to bring the electrons of negatively charge ions , to doubly-excited states, referred to as D-wave resonance. Positronium ions are, difficult for scientists to study because they disappear before they can see them.

Sabyasachi Kar from the Harbin Institute of Technology, China, and Yew Kam Ho from the Academia Sinica, Taipei, Taiwan, have now made these higher energy levels reached by electrons in resonance in these three-particle systems, which are too complex to be described using simple equations.

This is cool and fascinating to learn. It’s very interesting to me because it shows how hard scientists are working to make the future better in every way. It also shows how much they have to consetrate because seeing these things are rare and they are still able to do it with the little time they have possible.

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Electric charges on dust grains may help explain how planets are born

December 22, 2019 by reyessa · General Science

Scientist may have found out the solution to protoplanetary growing pains. The bouncing barrier hinders the clumping of dust particles that eventually form a planet. For the clumps to keep growing an electric charge can provide extra stickiness that those cosmic motes need. Testing this explanation it required shaking thousands of small glass beads and catapulting them more than 100 meters skyward to try and mimic planets’ birth. The experiment didn’t go as planned instead of it forming larger clumps and sticking together, the particles once they got a millimeter in size, their growth stalls as they bounce off one another. Other scientists tried this for themselves and used glass beads, each a bit less than half a millimeter in diameter. They then launched this with a 120-meter-tall catapult and it ended up working. But prior to the launching, they shook the beads, mimicking the collisions that particles would go through. That forced the beads to build of negative and positive charges so on the way down they clumped together.

It’s amazing what science can do. The fact that the only thing the first scientist didn’t do was shake the beads and if they had done so, it would have worked. It’s crazy how just shaking those beads can build up negative and positive charges which allowed them to clump together rather than in the first experiment with the first scientist their experiment would bounce off each other. It’s just great to see that these science experiments help us to understand how these planets are born.

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Gamma-Ray Laser Moves a Step Closer to Reality

December 17, 2019 by hofshik · General Science, Physics

Image result for gamma-ray laser

Positronium, which is hydrogen-like atom as well as a mixture of matter and antimatter, bound states of electrons and their antiparticles called positrons. Therefore, in order to create a gamma-ray laser beam, positronium needs to be in a state called Bose-Einstein condensate– which is a group of atoms in the same quantum state allowing gamma radiation. Helium, which is one of the most abundant elements in the universe does exist in liquid form only in super-low temperatures. Helium has a negative affinity for positronium. So, when an electron and a positron meet, their annihilation could be one outcome, helped by the production by a powerful and energetic type of electromagnetic radiation along with gamma radiation. As a result, the formation of positronium is the second outcome. The bubbles from helium contain positronium Bose-Einstein Condensates.

This is very interesting to me because of how much detail each item has to bring gamma-ray lasers to reality. It is fascinating how just the bubble in liquid helium contains a million atoms of positronium and would have a number density six times that of ordinary air. This is a very complicated scientific experiment. And it is amazing how gamma-ray lasers are slowly but surely moving closer to reality.

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Turning Light Energy into Heat to Fight Disease

December 17, 2019 by duquainz · Biology, Physics

Turning light energy into heat to fight disease

Scientists have found that they can use tiny particles that absorb light to create heat, which can help fight various diseases. They have reported that they can measure temperatures using a form of light called terahertz radiation. They tested this out by putting gold nanorods in water and then illuminated them with a laser. The rods absorbed the light and converted it to heat, which spread through the water. Upon more testing, they were able to tell that the smallest particles of gold converted it with the most efficiency. The largest rods were still effective, displaying the largest molar heating rate. “By combining measurements of temperature transients in time and thermal images in space at terahertz frequencies, we have developed a noncontact and noninvasive technique for characterizing these nanoparticles,” says scientist Roberto Morandotti. However, it is not as easy as it sounds. Living tissue is very delicate, and even the slightest misuse of this heat could cause lasting damage. Monitoring this heat is crucial in the development of this system; Many different methods have been tested, but every one has had significant drawbacks. At the same time, researchers believe this discovery holds promise and can be an alluring alternative to invasive methods.

This is very important and should be very useful for doctors down the road. Finding ways to fight disease are always great, and this one will make it easier and faster if they can learn to control it. Unfortunately, I think that it will be very difficult for them to control this and make it completely safe; however, I do fully believe that they will figure it out, even if it does take a long time. I think this will excite many people if they can do it regularly, especially if it is safer and more effective than the previous methods.

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Deflating Beach Balls and Drug Delivery

December 16, 2019 by zhaoh · Biology, Chemistry, Physics

Scientist Gwennou Coupier and his team at Grenoble Alpes University use deflating and inflating microscopic shells to deliver drugs. Basically, the structure of many natural microscopic objects, such as red blood cells or pollen grains, their structures is actually a distorted sphere. There is a theory about this thing – as it deflated it will lose internal volume, but this is a theory that not be proven yet, so Coupier and his team used an experiment to prove this theory. “A manometer used to measure the pressure of 1 atmosphere required a 10-meter-high tube that could only be set up in the lab staircase.” As this experiment proved the theory, so people could use it on the drug delivery to the tumor.

After I read this article, I felt shocked, because first I never knew about this theory, second, after I read this article I found this is really fascinating, because tumor is really small, but as the success of this experiment we could do this, so it could save a lot of patients’ lives.

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Theory on Explosions that Happen on Deformable Objects

December 16, 2019 by ubania · Physics

In line with current international research about the interaction of matter with high energies, the University of Seville researcher Alfonso M. Gañán Calvo has studied the explosive behavior of matter subjected to the highest known energy densities produced by humans on the Earth. As a result, he has developed a general theory and the first predictive analytical model of a three-dimensional violent explosion against a liquid object (very deformable). He has studied the mechanical behaviour of column water of very small diameter when an uncommonly powerful energy density is placed on it. He developed a model that predicts the temporal evolution of the explosive damage in the function of time, the properties of the liquid and the energy deposited.

The explosives released on these objects achieve a high power density, thanks to the release of energies of a fraction of a joule over an extremely short time and in microscopic volumes.

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Dark Matter at the Center of the Milky Way

December 16, 2019 by tumanbm · General Science

MIT physicists have reignited the idea that a bright burst of gamma rays in the center of our galaxy may, after all, be the product of dark matter, an idea that was once thought of to be incorrect. Physicists have known for years about a mysterious excess of energy in the form of gamma rays at the heart of Milky Way. Gamma rays are the most energetic waves in the electromagnetic spectrum. Supernovae and pulsars, the hottest and most intense events, typically produce these rays. There is a glow of gamma rays that physicists are having trouble explaining their properties.

To be honest I never really understood what dark matter is. I know that it’s said to make up most of the matter in the universe and that it is impossible to observe. The only reason scientists are able to it exists is by looking at the effects it has on other objects.

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Laser Probes Cold Atom Dynamics

December 16, 2019 by hillew · Physics

Scientists are able to learn about the depths of space just by using lasers around cold atom clouds. This helps the scientists get a better understanding of how our universe works and earth’s gravity, their words not mine.

I don′t really understand it all that much on how lasers can help us learn about the edge of the universe, but I’m also not a super scientist so whatever. Read the article, it’s dope.

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Tractionless Motion Is Possible

December 16, 2019 by cheny · Physics

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Scientists from the School of Mathematics at Bristol have recently observed and identified cells “crawling” on the surface through microscopes. They also pointed out that it is possible for us to do self-propulsion without traction since we’re all made out of cells. The study of this mechanism is crucial to a multitude of physiological processes in living organisms, including immune response and wound healing.

This study on cell’s tractionless motion just came out very recently, so there’s not too many information scientists had already researched. But based on what the article talked about, this is a very useful information for biologists and physicists further study on the cells, and perhaps once they fully understand it, it can be a great help to improve the human immune response and wound healing.

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Researchers Find Potential Solution to Overheating Mobile Phones

December 16, 2019 by xiez · Physics

Researchers find potential solution to overheating mobile phones

When modern computer memory works, it switchES magnetic bits within devices to encode information. NUS Electrical and Computer Engineering researchers found a new efficient way of using “spin waves” to switch magnetization at room temperature for more energy-efficient spin memory and logic devices. Traditional electronic chips suffer from heat due to the flow of an electric current. The high temperature can cause a large amount of power dissipation, hinder the chip’s processing speed, and limit the number of chips that can be incorporated into appliances. However, the new device can avoid charge so that less heat and power dissipation would be produced.

If this device can be improved and used in the world, we can avoid a lot of problems and accidents that the high temperature can make. The length of life of device will be much longer than that of modern device. Since everyone has a cell phone now, people don’t have to worry about the high temperature after using their cell phones for a long time as well as computers.

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