본문 4과-3
지문 분석결과
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영어 YBM(한) 1~5과
영어 YBM(한) 1~5과
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본문 4과-3
White started thinking about ways to help. He knew that even in the jungle, far from the city, there was good cell phone service. He thought that perhaps cell phone technology could solve the problem. After he returned home to the US, in his father's garage he developed a small listening device using an old cell phone. He attached a sensitive microphone to the cell phone so that it could detect chainsaw noise from up to three kilometers away. This device would be placed high up in a tree. When it picks up the buzz of a saw, it would send a message to a ranger's cell phone. White knew that he had to protect the cell phone so that it could survive in the hot and wet rainforest environment. His solution was to put the phone in a plastic box. Since there was no electricity where the phone needed to be placed, the device had to be able to power itself. White attached solar panels to the cell phone. He was sure that the panels would work, even under the shade of the thick tree leaves. 1, It all starts here, Sound of chainsaws is picked up by microphones in solar-powered cell phones. 2, Software sends a signal to cloud. 3, Real-time alert is received by a ranger on the ground nearby. 4, That enables the rangers to go to the site immediately.
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