This site uses cookies to improve your experience. To help us insure we adhere to various privacy regulations, please select your country/region of residence. If you do not select a country, we will assume you are from the United States. Select your Cookie Settings or view our Privacy Policy and Terms of Use.
Cookie Settings
Cookies and similar technologies are used on this website for proper function of the website, for tracking performance analytics and for marketing purposes. We and some of our third-party providers may use cookie data for various purposes. Please review the cookie settings below and choose your preference.
Used for the proper function of the website
Used for monitoring website traffic and interactions
Cookie Settings
Cookies and similar technologies are used on this website for proper function of the website, for tracking performance analytics and for marketing purposes. We and some of our third-party providers may use cookie data for various purposes. Please review the cookie settings below and choose your preference.
Strictly Necessary: Used for the proper function of the website
Performance/Analytics: Used for monitoring website traffic and interactions
An international team of physicists has created what might seem like a contradiction in terms: a non-radiating source of electromagnetism. Maxwell’s equations tell us that accelerating charges radiate energy in the form of electromagnetic waves. cm above the non-radiating source prototype.
The team, led by Dongfang Zhang and Franz Kärtner at the Center for Free-Electron Laser Science in Hamburg, created their instrument by compressing bunches of electrons to ultra-short durations, using millimetre-wavelength terahertz radiation. Terahertz manipulation. Highly synchronized. The instrument is described in Ultrafast Science.
Plaque brachytherapy treatments deliver radiation to eye tumours via radioactive sources called pellets or seeds, which are placed in a device called a plaque that is sewn onto the surface of the eye. The post Novel brachytherapy device treats eye cancer with intensity-modulated radiation appeared first on Physics World.
Surprising recent measurements hint that the universe isn’t expanding in the way we had thought, and it could be explained by still-theoretical dark radiation
Tardigrades are much more resilient than humans when it comes to exposure to ionizing radiation. So they can ignore a recent announcement from the Netherlands Authority for Nuclear Safety and Radiation Protection (ANVS) warning people against wearing several items that are claimed to “protect” from the microwave radiation used by 5G networks.
A technology called monochromatic X-ray imaging could reduce radiation dose per mammogram by a factor of five to 10 times, according to a research review published in the European Journal of Radiology. However, the radiation delivered by the technique has been a focus of debates regarding possible cancer risk associated with breast screening.
Due to breathing motion, lung tumours move during stereotactic body radiation therapy (SBRT). Scatter imaging, which collects photons scattered out of the radiation therapy beam, is a potential technique for real-time tracking of lung tumours. His research focuses on developing novel imaging techniques to guide radiation therapy.
A highly efficient way to convert optical photons into terahertz radiation has been developed by researchers in the US and Germany. Terahertz radiation falls between infrared light and microwaves in the electromagnetic spectrum and has a range of potential applications including security scanning and medical imaging.
Citing the ESTRO 2022 programme, she noted that many researchers are already developing adaptation and personalization for every part of the radiation treatment chain. Instead, even though it may be hard to use and difficult to interpret, use this information to personalize radiation therapy at every level for every patient.”.
The clock is ticking for the Radiation Exposure Compensation Act (RECA), which provides health screenings and compensation for people sickened by radiation from U.S. government to protect the public from dangerous and harmful radiation. nuclear weapons production.
Louis have found that radiation may reverse heart rhythm disorders, such as arrhythmias, long-term by reprogramming damaged heart cells. What we’ve seen is that radiation therapy can modulate how fast the impulse travels by changing the expression of genes and proteins in the heart.”. There are many ways to stop an arrhythmia.
As space missions venture ever further afield, spacecraft will inevitably be exposed to greater amounts of cosmic radiation that can damage or even destroy their onboard electronics. Cosmic radiation is ionizing radiation made up of a mixture of heavy ions and cosmic rays (high-energy protons, electron and atomic nuclei).
Targeted radionuclide therapy (TRT) can increase the effectiveness of immunotherapy, helping to eradicate metastatic cancer in mice even when the radiation dose is too low to destroy the cancer outright. NM600 can be used for both diagnostic imaging ( 86 Y-NM600) or delivery of therapeutic radiation ( 90 Y-NM600). 13:eabb3631).
At these extreme intensities, the laser pulse is able to push the plasma electrons forward by radiation pressure, which accelerates the carbon and protons. This is what we explore with radiobiology studies – looking at cell models, exposing them to laser-driven radiation and comparing it to standard sources. Simple cells.
But should they be worried about radiation from solar flares that they could be exposed to when flying? A research team led by Yosuke Yamashiki at Kyoto University has addressed that question by looking at radiation doses experienced in aeroplanes flying eight different routes during five events called “ground level enhancements” (GLEs).
That is long enough to see that there has been a noticeable trend in the Earth’s Energy Imbalance (EEI), mostly driven by a reduction in the solar radiation reflected by the planet, while the outgoing long wave radiation does not appear to contribute much. A paper last year (Goode et al., The total radiative forcing is.
To keep long-term moon residents safe from harmful radiation, lunar bases will need to be built several metres under the surface or inside caves or lava tubes
He, however, goes seriously off the rails when he estimates the impact of clouds on the radiation budget. We can measure directly how much solar radiation arrives at the Earth and once you spread it over the surface of the Earth, there is about 340 W/m 2.
Here are a few things that mark this report out from previous versions that relate to issues we’ve discussed here before: Extreme events are increasingly connected to climate (duh!) and other things worth noting – for instance, the much better and more direct graphics that they have clearly worked on a lot. 1981) which can be seen here.
In 2020, CO 2 was at ~410 parts per million, while CH 4 was around 1870 parts per <it>billion</it> (or 1.87 ppm, a factor of more than 200 smaller). However the relative rise since the pre-industrial is three times larger for CH 4 , around 150%, compared to the 50% increase in CO 2. W/m 2 for CH 4. References. Etminan, G. Myhre, E.J.
Our illnesses are from CHRONIC, low-level exposure from ionizing radiation over YEARS, through ingestion and inhalation. The Jana Elementary community also has concerns surrounding radiation exposure related to the Manhattan Project , and were recently making headlines for seeking answers and getting conflicting exposure reports.
CT-free PET reduces radiation dose. But the CT scan performed alongside to obtain attenuation maps can deliver a substantial radiation dose, negating these low-dose benefits. The lutetium in the scintillator contains a small amount – less than 3% – of the radioisotope 176 Lu, which emits background radiation during the scan.
He made some rather strange claims, such as that the Intergovernmental Panel on Climate Change (IPCC) allegedly should have forgotten that the earth is a sphere because “ most absorption of solar radiation takes place over the tropics, while there is excess emission of longwave radiation to space over higher latitudes ”.
By Bob Berwyn A scientific showdown over whether dispersing massive amounts of reflective particles high into the atmosphere could temporarily and safely mask global warming intensified this week, as a group of more than 60 researchers published a letter Monday calling for accelerated research and small-scale field experiments into what is called solar (..)
Although meant to minimize risks to human health, the proposed new limits would still be exceeded by any conceivable near-future crewed voyage to Mars. -- Read more on ScientificAmerican.com.
To determine an object’s quantum properties, you may only need to measure how it exchanges heat with its environment, without touching the object itself
Syntrichia caninervis is found in some of the most extreme places on Earth and can survive conditions that would kill almost any other organism, making it a potential candidate for colonising Mars
Albedo is the total reflection of incoming solar radiation by Earth. As industrial aerosols decreased due to this new regulation, particularly over the North Atlantic Ocean, the planetary albedo slightly decreased, which means that more incoming solar radiation was absorbed by the planet rather than reflected. What is albedo?
However, this is really just the beginning of what is likely to be a bit of a cottage industry in the next few months relating to possible causes/influences on the extreme temperatures seen in 2023. So to help people keep track, we’ll maintain a list here to focus discussions. They estimate 0.08 W/m2 forcing, and a warming in 2023 of ~0.04ºC.
In the band of radiation where CO2 absorbs a lot (~15 $mu$m), increasing CO2 levels in the troposphere make it ever harder for those photons to get to the stratosphere or above. The basic concept is easy to grasp though. The upper atmosphere is different from the troposphere in that pressure is much less, and it’s very dry.
One of the companies behind a new, French-designed nuclear reactor at Taishan in Guangdong, China, has written to the US government warning of an “imminent radiological threat” at the plant, but there doesn't appear to be any danger
The energy balance of our planet , the radiation arriving and leaving, is continually monitored by a global radiation network at the surface and by dedicated satellites. And yes, also the increase in back-radiation towards the Earth surface from the CO2 greenhouse effect is a measured fact.
Radiation exposure can damage the DNA in cells leading to a host of health problems including cancer and auto-immune disorders. What’s more troubling is the Centers for Disease Control reports children and young adults, especially girls and women, are more sensitive to the effects of radiation. UCS also suggests consideration of St.
Genetic analysis shows that microbes growing inside the International Space Station have adaptations for radiation and low gravity, and may pose a threat to astronauts
Electromagnetic radiation leaking from the cable between your computer and monitor can be intercepted and decoded by AI to reveal what you are looking at
As the climate crisis intensifies, experiments to “cool the planet” by reflecting solar radiation proliferate. Without proper global and national regulation, they will worsen the crisis
The protective bubble around the sun retreated dramatically after colliding with a freezing interstellar cloud, leaving much of the solar system exposed to radiation that shaped our evolution, a study suggests
Planets that orbit close to their parent stars are blasted with radiation and contorted by gravity – and the exoplanet TOI-6255b might be the most extreme example yet
We organize all of the trending information in your field so you don't have to. Join 12,000+ users and stay up to date on the latest articles your peers are reading.
You know about us, now we want to get to know you!
Let's personalize your content
Let's get even more personalized
We recognize your account from another site in our network, please click 'Send Email' below to continue with verifying your account and setting a password.
Let's personalize your content