Author: WeWorldMedia-admin

Cutting-edge air quality monitoring strengthens public health nationwide

Published: 14 March 2025
Categories: National Science Foundation

RSS feed source: National Science Foundation

The fires that devastated many in Los Angeles in January 2025 not only scarred the landscape but also changed the air.

A day after the Eaton fire burned through Altadena, California, chlorine levels in the atmosphere reached approximately 40 times the normal amount, while lead peaked at over 100 times the usual level. Atmospheric chlorine can cause respiratory irritation and distress; lead can cause damage to the brain and central nervous system.

“The Los Angeles fires burned homes and cars, which contain electronics, plastics and other synthetic materials that can give off toxic chemicals when they burn,” said Nga Lee “Sally” Ng, a professor at Georgia Tech.

Ng leads the U.S. National Science Foundation-supported Atmospheric Science and Chemistry mEasurement NeTwork (ASCENT), which includes 12 air quality measurement sites nationwide. Each site has state-of-the-art instruments that help us understand aerosols, or tiny particles in the atmosphere. The network is constantly analyzing the chemical constituents of aerosols with a diameter smaller than 2.5 micrometers, referred to as PM2.5, which contribute to more than 90% of the adverse health impacts associated with air pollution.

Researchers in the ASCENT team analyzed data from three locations across Southern California during and after the fire to reveal that certain aerosols carried a unique chemical signature associated with burning synthetic materials in urban fires.

“We now have a very powerful magnifying glass to see

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Lost Radiography Device

Published: 13 March 2025
Categories: IAEA

RSS feed source: National Science Foundation

Lost Radiography Device

Print View Posted on: 13 March 2025

Event Date: 06 March 2025 Event Type: Radiation Source Event Location: United States of America, Mentone, Texas / National Inspection Services, LLC INES Rating: 2 (Provisional)

On March 6, 2025, a radiography crew working approximately 16 km (10 mi) east of Mentone, Texas, reported losing a SPEC 150 exposure device containing a 3.53 TBq (95.4 Ci) iridium-192 source. A trainee set the exposure device on the back of the truck but failed to secure the device in the truck. The source was in the fully shielded position. Shortly after leaving the work site, the radiographers realized the exposure device was no longer in the back of the truck. The radiographers retraced the path they had traveled but did not find the device. Two other trucks passing that way were stopped but the drivers had not seen the device. The licensee has offered a cash award for the return of the device and Texas state authorities issued a press release to alert the public (https://www.dshs.texas.gov/news-alerts/dshs-notifies-public-missing-radiographic-camera-loving-county). U.S. Department of Energy Radiological Assistance Program teams have assisted the licensee and Texas state authorities

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#StopRansomware: Medusa Ransomware

Published: 11 March 2025
Categories: US-Computer Emergency Readiness Team

RSS feed source: National Science Foundation

Summary

Note: This joint Cybersecurity Advisory is part of an ongoing #StopRansomware effort to publish advisories for network defenders detailing various ransomware variants and ransomware threat actors. These #StopRansomware advisories include recently and historically observed tactics, techniques, and procedures (TTPs) and indicators of compromise (IOCs) to help organizations protect against ransomware. Visit stopransomware.gov to see all #StopRansomware advisories and to learn more about other ransomware threats and no-cost resources.

The Federal Bureau of Investigation (FBI), Cybersecurity and Infrastructure Security Agency (CISA), and the Multi-State Information Sharing and Analysis Center (MS-ISAC) are releasing this joint advisory to disseminate known Medusa ransomware TTPs and IOCs, identified through FBI investigations as recently as February 2025. 

Medusa is a ransomware-as-a-service (RaaS) variant first identified in June 2021. As of February 2025, Medusa developers and affiliates have impacted over 300 victims from a variety of critical infrastructure sectors with affected industries including medical, education, legal, insurance, technology, and manufacturing. The Medusa ransomware variant is unrelated to the MedusaLocker variant and the Medusa mobile malware variant per the FBI’s investigation.

FBI, CISA, and MS-ISAC encourage organizations to implement the recommendations in the Mitigations section of this advisory to reduce the likelihood and impact of Medusa ransomware incidents.

Download the PDF version of this report:

For a downloadable list of IOCs, see:

AA25-071A STIX XML (XML, 34.30 KB )

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