Current Detonation News and Events

Current Detonation News and Events, Detonation News Articles.
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Study reveals robust performance in aged detonator explosive
High-speed video (39,000 frames per second) of the initiation of a detonator holding 40 milligrams of PETN, encased in an acrylic holder. (2020-10-28)

Hubble watches exploding star fade into oblivion
When a star unleashes as much energy in a matter of days as our Sun does in several billion years, you know it's not going to remain visible for long. Like intergalactic paparazzi, NASA's Hubble Space Telescope captured the quick, fading celebrity status of a supernova, the self-detonation of a star. (2020-10-01)

A rapid finger-stick blood test quickly estimates radiation exposure in mice
A new finger-stick test can use a single drop of blood to quickly estimate how much harmful radiation mice have been exposed to, according to a study. (2020-07-15)

Protecting Earth from asteroid impact with a tethered diversion
A new paper published in EPJ Special Topics, co-authored by Flaviane Venditti, Planetary Radar Department, Arecibo Observatory, University of Central Florida, Arecibo, suggests the use of a tether assisted system to prevent PHA impact. (2020-06-18)

Theory of detonation-driven hypervelocity shock tunnels and its demonstration
The hypersonic ground testing is a critical issue for hypersonics. The problems arising from developing hypervelocity shock tunnels are identified and discussed in detail. The theory of detonation-driven hypervelocity shock tunnels is proposed for developing advanced ground facilities. The forward detonation cavity driver is developed to remove rarefaction wave effects for enhancing driving ability. The tailored condition for detonation-driven shock tunnels is also proposed to achieve long test duration. (2020-05-18)

Cold War nuke tests changed rainfall
Historic records from weather stations show that rainfall patterns in Scotland were affected by charge in the atmosphere released by radiation from nuclear bomb tests carried out in the 1950s and '60s. (2020-05-13)

UCF researchers develop groundbreaking new rocket-propulsion system
A University of Central Florida researcher and his team have developed an advanced new rocket-propulsion system once thought to be impossible. The system, known as a rotating detonation rocket engine, will allow upper stage rockets for space missions to become lighter, travel farther, and burn more cleanly. The result were published this month in the journal Combustion and Flame. (2020-04-30)

Simple, fuel-efficient rocket engine could enable cheaper, lighter spacecraft
University of Washington researchers have developed a mathematical model that describes how rotating detonation engines work. (2020-02-18)

First-of-its-kind study examines toll of nuclear war on world's oceans
A new study reveals a previously unknown cost of nuclear war -- shifts in ocean chemistry that could have serious consequences for the world's coral reefs and other marine life. (2020-02-05)

Americans perceive likelihood of nuclear weapons risk as 50/50 tossup
It has been 30 years since the end of the Cold War, yet on average, Americans still perceive that the odds of a nuclear weapon detonating on U.S. soil is as likely as a coin toss, according to new research from Stevens Institute of Technology. (2020-01-22)

New study sheds light on conditions that trigger supernovae explosions
For the first time, researchers were able to demonstrate the process of detonation formation using both experiments and numerical simulations carried out on supercomputers. (2019-11-01)

UCF researchers discover mechanisms for the cause of the Big Bang
The origin of the universe started with the Big Bang, but how the supernova explosion ignited has long been a mystery -- until now. (2019-10-31)

Using lasers to study explosions
An explosion is a complex event involving quickly changing temperatures, pressures and chemical concentrations. A special type of infrared laser, known as a swept-wavelength external cavity quantum cascade laser, can be used to study explosions. This versatile instrument has a broad wavelength tuning range that allows the measurement of multiple chemical substances in an explosive fireball. The ability to measure and monitor the dramatic changes during explosions could help scientists understand and even control them. (2019-09-03)

Radiation in parts of Marshall Islands is higher than Chernobyl
Radiation levels in parts of the Marshall Islands in the central Pacific Ocean, where the United States conducted nearly 70 nuclear tests during the Cold War, are still alarmingly high. Columbia University researchers tested soil samples on four uninhabited isles and discovered that they contained concentrations of nuclear isotopes that are significantly higher than those found near Chernobyl and Fukushima. (2019-07-17)

Researchers cast neural nets to simulate molecular motion
New work from Los Alamos National Laboratory, the University of North Carolina at Chapel Hill, and the University of Florida is showing that artificial neural nets can be trained to encode quantum mechanical laws to describe the motions of molecules, supercharging simulations potentially across a broad range of fields. (2019-07-02)

Chemists created new diagnostic method for difficult climate conditions
Scientists from ITMO University developed a method to detect viral RNA without special equipment. The sensor is based on a polymerization reaction: if the sample contains traces of the target virus, then under the ultraviolet irradiation the liquid-sensor turns into a gel. The results of such an analysis can easily be detected even by people with limited vision. Due to stable reagents the method can be used in difficult field conditions. The results are published in RSC Advances. (2018-12-03)

Climate change risks 'extinction domino effect'
New research reveals the extinction of plant or animal species from extreme environmental change increases the risk of an 'extinction domino effect' that could annihilate all life on Earth. This would be the worst-case scenario of what scientists call 'co-extinctions', where an organism dies out because it depends on another doomed species, with the findings published today in the journal Scientific Reports. (2018-11-29)

Professors use whale earwax to reconstruct whale stress levels spanning 150 years
In a follow-up to their groundbreaking study, Baylor University researchers were able to reconstruct baleen whales' lifetime stress response to whaling and other manmade and environmental factors spanning nearly 150 years. (2018-11-21)

New model helps define optimal temperature and pressure to forge nanoscale diamonds
To forge nanodiamonds, which have potential applications in medicine, optoelectronics and quantum computing, researchers expose organic explosive molecules to powerful detonations in a controlled environment. These explosive forces, however, make it difficult to study the nanodiamond formation process. To overcome this hurdle, researchers recently developed a procedure and a computer model that can simulate the highly variable conditions of explosions on phenomenally short time scales. They report their work in The Journal of Chemical Physics. (2018-10-15)

Self-assembled energetic coordination polymers based on multidentate pentazole cyclo-N5-
In this work, guanidine cation CN3H6+ and 3-amino-1,2,4-triazole C2H4N4 were crystallized into NaN5 and two novel energetic coordination polymers (CPs), (NaN5)5[(CH6N3)N5](N5)3- and (NaN5)2(C2H4N4) were prepared respectively via a self-assembly process. The decomposition temperatures of both polymers increase to 118.4 and 126.5°C respectively. Moreover, no crystallized H2O was generated in products to afford the anhydrous compounds of pentazole salts as promising energetic materials. (2018-06-22)

Life in the fast lane: USU ecologist says dispersal ability linked to plants' life cycles
Utah State University ecologist Noelle Beckman says seed dispersal is an essential, yet overlooked, process of plant demography, but it's difficult to empirically observe, measure and assess its full influence. (2018-06-17)

Army scientists have a blast with aluminum nanoparticles
Army scientists proved a decades-old prediction that mixing TNT and novel aluminum nanoparticles can significantly enhance energetic performance. This explosive discovery is expected to extend the reach of US Army firepower in battle. (2018-06-11)

Seismometer readings could offer debris flow early warning
A debris flow that struck Montecito, Calif., in January was detected by a nearby seismometer. (2018-05-30)

Radar reveals details of mountain collapse after North Korea's most recent nuclear test
North Korea's Sept. 3, 2017, underground nuclear test -- it's latest and biggest -- created a 5.2 magnitude earthquake and 4.5 magnitude aftershock. Researchers from Singapore, UC Berkeley, Germany and China combined synthetic aperture radar with seismic measurements to determine that the explosion pushed the mountain surface outward up to 11 feet and left it 20 inches shorter, probably after cavity collapse and subsequent compression of fractured rock. The aftershock may have been a tunnel collapse. (2018-05-10)

Army's new find lowers accidental stockpile detonation
Scientists at two major national laboratories have demonstrated a new method for testing explosives stored in weapons stockpiles, a step they say will help reduce accidental detonation and ensure the weapons perform as expected. (2018-05-01)

One step closer to understanding explosive sensitivity with molecule design
Explosives have an inherent problem -- they should be perfectly safe for handling and storage but detonate reliably on demand. (2018-04-18)

What else can molecular perovskite do?
Combining good detonation performance, high stability and low cost is the major hindrance on high-performance explosives. A recent report by Wei-Xiong Zhang and Xiao-Ming Chen, Sun Yat-Sen University, China, presents a new sort of high-energetic materials produced by molecular perovskites, which achieve both exceptional detonation properties and high stability superior to the current benchmarks of military explosives, and importantly, could be prepared via a simple one-pot reaction under ambient condition by using low-cost raw chemicals. (2018-03-27)

The view from inside supersonic combustion
In supersonic engines, achieving the right flow speed, producing the right ratio of evaporated fuel and causing ignition at the right time is complex. Vortices are affected by the shock wave, and this changes the way the fuel combusts and multiplies the number of possibilities of how particles can behave. To deepen our understanding, researchers use numerical modeling to calculate the huge variety of possible outcomes. They discuss their work in Physics of Fluids. (2018-03-15)

Researchers bring the bling to improve implants
In a world first, Australian researchers have harnessed the power of diamonds in a breakthrough that could lead to radical improvements in the way human bodies accept biomedical implants. (2018-03-13)

North Korean nuclear test measured in southwest Germany
The recent nuclear test by the regime in North Korea was even measurable in Southwest Germany. Two seismic stations run by scientists of Karlsruhe Institute of Technology (KIT) in the Karlsruhe city center and in Durlach recorded vibrations of 6.3 in body wave magnitude in the night from Saturday to Sunday. (2017-11-08)

First-ever US experiments at new X-ray facility may lead to better explosive modeling
For the first time in the US, time-resolved small-angle x-ray scattering (TRSAXS) is used to observe ultra-fast carbon clustering and graphite and nanodiamond production in the insensitive explosive Plastic Bonded Explosive (PBX) 9502, potentially leading to better computer models of explosive performance. (2017-11-06)

Violent helium reaction on white dwarf surface triggers supernova explosion
An international research team are the first to find solid evidence about what triggered a star to explode, which will contribute to a further understanding of supernova history and behavior. (2017-10-05)

Astrophysicists discovered a star polluted by calcium
An international team of astrophysicists led by a scientist from the Sternberg Astronomical Institute of the Lomonosov Moscow State University reported the discovery of a binary solar-type star inside the supernova remnant RCW 86. Spectroscopic observation of this star revealed that its atmosphere is polluted by heavy elements ejected during the supernova explosion that produced RCW 86. (2017-04-28)

UTA aerospace engineering professor named AIAA Fellow
Frank Lu, a professor in the Aerospace Engineering Department at The University of Texas at Arlington, has been named a Fellow of the American Institute for Aeronautics and Astronautics. (2017-01-31)

Aerospace engineering doctoral student earns NASA Pathways internship
Cody Ground, a doctoral student in The University of Texas at Arlington's Mechanical and Aerospace Engineering Department, has earned a prestigious Pathways internship with the Hypersonic Air-Breathing Propulsion Branch at NASA Langley Research Center in Hampton, Va. (2017-01-27)

Physicists patent detonation technique to mass-produce graphene
A Kansas State University team of physicists has patented a detonation technique that can mass-produce graphene with three ingredients: hydrocarbon gas, oxygen and a spark plug. (2017-01-25)

The case of the missing diamonds
A Washington University physicist practiced at finding tiny diamonds in stardust from the pre-solar universe has repeatedly failed to find them in Younger Dryas sedimentary layers, effectively discrediting the hypothesis that an exploding comet caused the sudden climate reversal at the end of the last Ice Age. (2016-12-19)

De-icing agent remains stable at more than a million atmospheres of pressure
Lawrence Livermore National Laboratory scientists have combined X-ray diffraction and vibrational spectroscopy measurements together with first-principle calculations to examine the high-pressure structural behavior of magnesium chloride. (2016-08-12)

Long-term health effects of Hiroshima and Nagasaki atomic bombs not as dire as perceived
The detonation of atomic bombs over Hiroshima and Nagasaki in August 1945 resulted in horrific casualties. The long-term effects of radiation exposure also increased cancer rates in the survivors. But public perception of the rates of cancer and birth defects among survivors and their children is greatly exaggerated when compared to the reality revealed by comprehensive follow-up studies. The reasons for this mismatch are discussed in a review published in the journal GENETICS. (2016-08-11)

Study finds new tool to measure homeland security risks
Researchers have validated a new risk assessment tool that can be used by the Department of Homeland Security to help evaluate decisions and priorities in natural disasters, terrorist events, and major accidents. (2016-06-30)

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