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|SAN FRANCISCO Nike Vapormax Bleu Pas Cher , Nov. 10 (Xinhua) -- Researchers have combined diatom with a version of inkjet printing and optical sensing to create a sensing device that may be up to 10 million times more sensitive than some other commonly used approaches.
"Some existing sensors can detect compounds at levels of one part per billion, which sounds pretty good, but for many purposes that's not good enough," said Alan Wang, an assistant professor of electrical engineering in the Oregon State University (OSU) College of Engineering.
As corresponding author on a study published in the journal Nanoscale, Wang and his colleagues combined advanced optics with a fluidic system to identify compounds. With most conventional systems of this type Nike Vapormax Noir Pas Cher , fluids must flow over a surface, and this limits the transport of specific molecules you might want to identify.
"A natural, living type of phytoplankton that creates very precise, tiny structures," Wang explained, diatoms in his study act as natural "photonic crystals" that harness the forces of convection against diffusion to help accelerate and concentrate molecules in a space where photons from optical sensors can get trapped Nike Vapormax Pas Cher , interact with and identify the compound through optical signatures.
"When liquids are deposited on it with carefully controlled inkjet devices, the droplets evaporate quickly, but, in the process, carry the molecules of interest to the diatom surface. This is the key to increasing the sensitivity of the photonic measurements."
The technology, the researchers said Nike Presto Ultra Flyknit Pas Cher , can quickly and accurately identify what compounds are present, and approximately how much, at low cost. In one demonstration, they tried to identify trinitrotoluene, or TNT, a chemical with very low volatility Nike Presto SE Woven Pas Cher , meaning comparatively few molecules escape that could allow detection when it is built into an explosive device. It was one million more times sensitive at identifying TNT than other common approaches, Wang said.
Already patented, the "optofluidic" technology with enormous sensitivity might improve biomedical sensing of cancer biomarkers; be used for extraordinarily precise forensics work; save the lives of military personnel in combat situations; detect illegal drugs; or help tell whether organic food is really pesticide free or not.
SAN FRANCISCO, Jan. 2 (Xinhua) -- Google released Tuesday itsJanuary 2018 security patch to fix a total of 38 securityvulnerabilities for supported Pixel and Nexus devices.
A bulletin released by Google said the security patch addressedall critical vulnerabilities across multiple components like theAndroid runtime, media framework, kernel Nike Presto Safari Pas Cher , as well as LG, HTC,MediaTek, NVIDIA, and Qualcomm components.
The patch applies to all Pixel and Nexus devices, includingNexus 5X Nike Presto QS Pas Cher , Nexus 6P Pixel, Pixel XL, Pixel 2, Pixel 2 XL, and PixelC users to keep their devices secure.
"The most severe of these issues is a critical securityvulnerability in Media framework that could enable a remoteattacker using a specially crafted file to execute arbitrary codewithin the context of a privileged process," Google said in thesecurity bulletin.
Although Google has not received any reports about its users'devices being exploited via these vulnerabilities Nike Presto Noir Pas Cher , it stronglyrecommends that they upgrade their devices to the new securitypatch in the shortest possible time.
Google released its latest version of "Oreo" Android 8.1 OS lastmonth, with a host of improvements and new features, includinglight and dark themes that turn on automatically based on the homescreen wallpaper.
BEIJING, Dec. 27 (Xinhua) -- Profit growth of China's major industrial firms slowed in the first 11 months of this year, the National Bureau of Statistics (NBS) said Wednesday.
The companies reported a 21.9 percent year-on-year profit increase in the January-November period, down from 23.3 percent in the first ten months Nike Presto Mid Utility Pas Cher , the NBS said in a statement.
In November alone, profits of major industrial firms rose 14.9 percent year on year, it said.
WASHINGTON， Jan. 20 (Xinhua) -- At around noon on Friday on the steps of the U.S. Capitol， Donald Trump was sworn in as the 45th president of the United States.
Born on June 14， 1946 in New York City， Trump graduated from the University of Pennsylvania Wharton School of Business in 1968 and entered his father's real estate company.
He took reins of the company in 1971 and forged his own business empire in the following decades.
Over the years， Trump invested in casinos， golf clubs and became an entertainment personality with his reality TV show the Apprentice and Miss Universe beauty pageants.
Trump was estimated by Forbes Magazine to be worth 4.5 billion U.S. dollars， he's self-claimed worth was 10 billion dollars.
Trump has previously supported presidential candidates from both major political parties， and announced his own bid for presidency in June 2015.
He has never held public offices before.
Trump's campaign slogan was "Make America Great Again"， he advocated for tougher national security measures and promised to attract jobs to the United States. He has also said he will erect a wall along the U.S.-Mexican border to block "illegal immigrants."
After beating Democrat nominee Hillary Clinton in November， Trump was questioned for nominating a cabinet dominated by wealthy business elites and veterans， and his soft position on Russia， which has been accused by the U.S. intelligence community to have tampered with the presidential campaign.
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