| In the days before Bitstream, CD players came with impressive labels like 16x4, PEM, PWM and Multi Stage Noise Shaping. |
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| In a PEM, a piece of crystalline quartz is electronically excited to resonate at a frequency determined by its shape and crystal orientation. |
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| The groundwater enters the PEM tube allowing gravity to conduct it to a coarser sand layer, where it can drain more quickly. |
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| The PEM modules are placed in a row from the dune to the mean low waterline. |
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| Permeable PEM tubes inserted vertically into the foreshore connect the different layers of groundwater. |
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| Ethanol is a renewable material, which when dehydrogenated produces high purity hydrogen that can be used in PEM fuel cells. |
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| Therefore, the risk from mammography is essentially only that of induced breast cancer, while PEM can lead to cancer induction in any number of radiosensitive organs. |
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