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Profiteering Hampers U.S. Grid Expansion

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The United States is not building enough transmission lines to connect regional power networks. A transmission network contains webs of connections, which create a reliable, redundant power-supply system of massive scale. The goal is to keep the lights on at a low cost by utilizing an efficient mix of power plants.

Grid 139
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Sustainable Weather Balloon Wins Student a $10,000 Scholarship

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In comparison to launching 2,000 to 5,000 balloons that stay up for just two to three hours, my balloon can stay up in the air for 52 days.” In comparison to launching 2,000 to 5,000 balloons that stay up for just two to three hours, my balloon can stay up in the air for 52 days, so fewer balloons have to be launched,” he says.

Solar 98
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Designing the First Apple Macintosh: The Engineers’ Story

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make a low-cost “appliance”-type computer that would be as easy to use as a toaster. Peripherals were connected to serial ports in a daisy-chain configuration with the Apple bus network. Defining terms Backplane An electrical connection common to two or more printed-circuit boards.

Design 117