Large-strain consolidation theory is widely used for the management of dredged disposal sites. The theory is universally accepted to deal with this problem, though the determination of the material properties is not yet standardised. Decisions made on this level can lead to the prediction of a totally different consolidation history. This paper describes the results of a prediction exercise, performed using a batch of sediment from the river Schelde (Antwerpen, Belgium). Numerical modellers were given the data of four calibration experiments and were then asked to predict another experiment. Settling column experiments (0·2–0·6 m in height) with density and pore pressure measurements provided the basis for the calibration data. The prediction demonstrated the significance of the soil compressibility at low effective stresses, when time-dependent behaviour is observed.

A fully-integrated 8-way power combining amplifier for 120 GHz application in an advanced 90 nm SiGe HBT technology is presented. The single-ended PA breakout has a small-signal gain of 20 dB and Psat of 12.5-13.8 dBm at 114 to 130 GHz. The 8-way power combining PA achieves a small-signal gain of 15 dB and peak Psat of 20-20.8 dBm at 114-126 GHz with a PAE of 7.6-6.3 %. To our knowledge, this is the highest power silicon-based D-band amplifier to-date.

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Abstract:We present experimental results on the observation of a bulk second-order nonlinear susceptibility derived from both free-space and integrated measurements in silicon nitride. Phase-matching is achieved through dispersion engineering of the waveguide cross-section, independently revealing multiple components of the nonlinear susceptibility, namely χ (2) yyy and χ (2) xxy. Additionally, we show how the generated second-harmonic signal may be actively tuned through the application of bias voltages across silicon nitride. The nonlinear material properties measured here are anticipated to allow for the practical realization of new nanophotonic devices in CMOS-compatible silicon nitride waveguides, adding to their viability for telecommunication, data communication, and optical signal processing applications.

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