Power curve measurements provide a conventional and effective means of assessing the performance of a wind turbine, both commercially and technically. Increasingly high wind penetration in power systems and offshore accessibility issues make it even more important to monitor the condition and performance of wind turbines based on timely and accurate wind speed and power measurements. Power curv...

Isolated power systems meet the electricity demand by generating power close to its point of utilisation. It is viewed as an option to electrify communities located in remote areas where extending the grid could be uneconomic. The principal design objective for such systems is the estimation of the ratings of the generators and the storage capacity requirements for meeting specified reliability...

Let E E be an ordinary elliptic curve over a finite field and alttext="g"> g encoding="application/x-tex">g</mml:annot...

Abstract Tidal-stream energy resource can be predicted deterministically, provided tidal harmonics and turbine-device characteristics are known. Many turbine designs exist, all having different (e.g. rated speed), which creates uncertainty in assessment or renewable system-design decision-making. A standardised normalised tidal-stream power-density curve was parameterised with data from 14 oper...

Wind turbine power curve cleaning, by way of removing curtailment, stoppage, and other anomalies, is an essential step in making raw data useable for further analysis, such as determining performance, site characteristics, or improving forecasting models. Typically, comes SCADA (Supervisory Control Data Acquisition) data, so contains not only environmental performance but also the control actio...

Recent applications of lattice attacks against elliptic curve cryptosystems have shown that the protection of ephemeral keys in the ECDSA is of greatest importance. This paper shows how to enhance simple power-analysis attacks on elliptic-curve point-multiplication algorithms by using Markov models. We demonstrate the attack on an addition-subtraction algorithm (fixing the sequence of elliptic-...