GeoMAREA: A Gamma‐ray spectrometer for in‐situ marine environmental applications

AD5933-based Spectrometer for Electrical Bioimpedance Applications

To build an Electrical Bioimpedance (EBI) spectrometer using the Impedance Measurement System-On-Chip AD5933 together with a 4-Electrode Analog Front End (4EAFE) has been proven practicable. Such small measurement devices can make possible several new applications of EBI technology, especially when combined with functional textiles, which can enable wearable applications for personal health and...

new applications of cuttlebone (cb) as a natural marine compound

A calibrated digital sideband separating spectrometer for radio astronomy applications

Dual sideband (2SB) receivers are well suited for the spectral observation of complex astronomical signals over a wide frequency range. They are extensively used in radio astronomy, their main advantages being to avoid spectral confusion and to diminish effective system temperature by a factor two with respect to double sideband (DSB) receivers. Using available millimeter-wave analog technology...

A hydrostatic robot for marine applications

Invertebrates that use a fluid-filled cavity surrounded by contractile tissue (a hydrostatic skeleton) propel themselves efficiently underwater and penetrate regions inaccessible to legged or wheeled devices. A hydrostatic robot would therefore be invaluable for exploring marine environments. We have constructed a three-segment hydrostatic robot that locomotes underwater. Each segment consists ...

Holographic insitu stress measurements

A new instrument for measuring the in siru level of stress in boreholes has been developed. The instrument operates on the principle of locally relieving the stresses acting on a rock mass by drilling a small hole into the borehole surface and recording the resultant displacement field by holographic interferometry. Because the recording technique is optical, the entire displacement field due t...