Tags : 上海spa 花头

first_imgThe outer radiation belt is often enhanced during storms while the inner belt is usually considered to be unaffected by geomagnetic activity. During the most recent Halloween superstorms, the extreme erosion of the plasmasphere allowed particles to be transported closer to the Earth where they were locally accelerated. Modeling, which now includes transport with resonant acceleration and loss processes and mixed diffusion, shows a rather good correspondence with observations. In this study, we use the same version of the VERB code to model a storm stronger than the Halloween storms, which most likely occurred in the past and may occur in the future. Our simulations indicate that during such a strong event, electrons will be transported into the heart of the inner zone, where they will be accelerated by chorus waves. When the plasmapause extends to larger distances, electrons accelerated by resonant wave-particle interactions in the inner radiation belt will find themselves in a very different plasma environment and strong fluxes may persist for several years after such a storm. Such intensification of the near-Earth plasma environment would substantially decrease satellite lifetimes at LEO. The radiation mitigation strategy for satellites operating in the inner belt should include a consideration of the potential for a dramatic increase in the near-Earth radiation. Such intensification of the near-Earth radiation environment may be truly devastating and would substantially decrease the lifetimes of meteorological, communication, and military satellites.last_img read more

first_img Newsroom GuidelinesNews TipsContact UsReport an Error A rendering of the proposed aerial tramway connecting Union Station to Dodger Stadium. (Photo courtesy of Aerial Rapid Transit Technologies LLC)LOS ANGELES — A proposed gondola from Union Station to Dodger Stadium has advanced to a second stage of consideration, Metro announced Monday.The transit agency confirmed that an unsolicited bid it received from Aerial Rapid Transit Technologies has advanced to a phase two, where the proposer is invited to submit a more comprehensive proposal.RELATED STORY: Latest Dodgers, McCourt idea is going, going, gondolaMetro’s unsolicited proposal policy allows the private sector to submit ideas to the agency. All proposals are subject to a phase one analysis within 60 days of being received and Metro can then choose to advance proposals to a more detailed phase two review. Aerial Rapid Transit Technologies, which is funded by former Dodgers owner Frank McCourt, submitted the initial bid in April. A gondola and other options for improving access to Dodger Stadium was part of an informational study in 1990 by the Los Angeles County Transportation Commission, a precursor agency to Metro, but the idea was never pursued beyond the study, Metro said.A rendering of the proposed aerial tramway connecting Union Station to Dodgers Stadium. (Photo courtesy of Aerial Rapid Transit Technologies LLC)McCourt sold the team in 2011 but still owns half interest in the 130 acres of parking around the stadium. McCourt’s investment firm would fund a portion of the project’s estimated $125-million cost and would seek private financing for the remainder, the Los Angeles Times reported.Sign up for our Inside the Dodgers newsletter. Be the best Dodger fan you can be by getting daily intel on your favorite team. Subscribe here.If Metro approves the phase two proposal, it could be the basis for a competitive procurement, a sole source agreement or another arrangement depending on Metro’s role and relationship to the project, the agency said.last_img read more