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Piezoceramics belongs to a sub-group of piezoelectricity. The post-WWII era research and development, in metal oxide-based piezoceramics, ushered in dramatic opportunities for transducer applications. Natural crystal materials such as quartz and tourmaline were still being used, but the new ferroelectrics (manmade crystalline materials) offered substantially higher sensitivities and temperature ranges...
Mesenchymal hamartoma of the liver (MHL) is an uncommon benign primary liver tumor that typically occurs in the pediatric population, although cases have been described in adults. MHL is sometimes associated with the highly malignant undifferentiated embryonal sarcoma (UES), and the synchronous or metachronous occurrence of MHL and UES suggests they share a common genetic link. Although the exact...
In many Wireless Sensor Network applications the desired deployment lifetime is specified in months or years. To meet very low power requirements duty cycled medium access control protocols incur increased latency in communication. In this paper, we present the use of a secondary, very low power, wake-up channel, using Free Space Optical (FSO) transmission. The FSO channel is used to send small wake-up...
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