● Farid Alfawakhiri (AISC, Inc.) ● K. A. Marchand (Walter P. Moore and Associates, Inc.)
Headlines: 📍Introduction 📍Section 1: General Science of Blast Effects 📍Section 2: Determining Threats and Acceptable Risk 📍Section 3: Resistance of Steel Structural Systems to Blast and Locally Extreme Loads 📍Section 4: Mitigation of Progressive Collapse in Steel Structures 📍Section 5: Best Practices to Mitigate Blast Effects 📍Section 6: Best Practices to Mitigate Progressive Collapse Effects 📍Section 7: A Recent History of Blast and Collapse Events 📍Section 8: Current Research and Future Needs
● Farid Alfawakhiri (AISC, Inc.) ● K. A. Marchand (Walter P. Moore and Associates, Inc.)
Headlines: 📍Introduction 📍Section 1: General Science of Blast Effects 📍Section 2: Determining Threats and Acceptable Risk 📍Section 3: Resistance of Steel Structural Systems to Blast and Locally Extreme Loads 📍Section 4: Mitigation of Progressive Collapse in Steel Structures 📍Section 5: Best Practices to Mitigate Blast Effects 📍Section 6: Best Practices to Mitigate Progressive Collapse Effects 📍Section 7: A Recent History of Blast and Collapse Events 📍Section 8: Current Research and Future Needs
Russian President Vladimir Putin launched Russia's invasion of Ukraine in the early-morning hours of February 24, targeting several key cities with military strikes. Telegram does offer end-to-end encrypted communications through Secret Chats, but this is not the default setting. Standard conversations use the MTProto method, enabling server-client encryption but with them stored on the server for ease-of-access. This makes using Telegram across multiple devices simple, but also means that the regular Telegram chats you’re having with folks are not as secure as you may believe. On February 27th, Durov posted that Channels were becoming a source of unverified information and that the company lacks the ability to check on their veracity. He urged users to be mistrustful of the things shared on Channels, and initially threatened to block the feature in the countries involved for the length of the war, saying that he didn’t want Telegram to be used to aggravate conflict or incite ethnic hatred. He did, however, walk back this plan when it became clear that they had also become a vital communications tool for Ukrainian officials and citizens to help coordinate their resistance and evacuations. A Russian Telegram channel with over 700,000 followers is spreading disinformation about Russia's invasion of Ukraine under the guise of providing "objective information" and fact-checking fake news. Its influence extends beyond the platform, with major Russian publications, government officials, and journalists citing the page's posts. Overall, extreme levels of fear in the market seems to have morphed into something more resembling concern. For example, the Cboe Volatility Index fell from its 2022 peak of 36, which it hit Monday, to around 30 on Friday, a sign of easing tensions. Meanwhile, while the price of WTI crude oil slipped from Sunday’s multiyear high $130 of barrel to $109 a pop. Markets have been expecting heavy restrictions on Russian oil, some of which the U.S. has already imposed, and that would reduce the global supply and bring about even more burdensome inflation.
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