Annalisa De Girolamo, Biancamaria Ciasca, Michelangelo Pascale, Veronica M.T. Lattanzio
Determination of Trichothecenes and Zearalenone in Wheat and Derived Products by LC-MS/MS: Development of a Standard Method Within the Cen Mandate M/520

Results obtained within a project under the European Commission standardization mandate M520/EN (item 4) are herein presented. Aim of the project was to develop and validate an analytical method for the simultaneous determination of nivalenol, deoxynivalenol and its acetyl derivatives, T-2 and HT-2 toxins, and zearalenone in cereals and cereal products by liquid chromatography - tandem mass spectrometry. The standardized method shall be applied to perform official control of the above food products, and to determine whether a production batch can be put on the market.

Domenico Luca Carnì, Giuseppe Fedele, Francesco Lamonaca, Maria Riccio
Instantaneous frequency estimation of distorted sinusoidal signal by “quasi” repetitive approach

In this paper a control scheme based on a "quasi" repetitive controller is proposed for asymptotic tracking of the instantaneous frequency of distorted sinusoidal signals. The resonant frequency of the repetitive controller is tuned by using an adaptive orthogonal signals generator based on a second-order generalized integrator. Experimental results are performed to highlight the characteristics and performances of the proposed method, in comparison with other existing approaches.

Pavel Zvada, Evgenii Zelenskii, Yury Kononov
The Experimental Studies to Improve the Measurements Synchronization Accuracy in the 10 kV Feeder at Zero Crossing by Calculated Compensation of Phase Shift of Voltage

The article research a low-cost method for synchronization of measurements in distribution networks in terms of a mains’ voltage signal zero crossing. In order to improve the accuracy of synchronization it is suggested compensating for the phase shift of voltage in the network nodes using the algorithmic technique relative to the power supply voltage. It calculates the network mode for the positive sequence of the fundamental harmonic to compute the phase shifts. The experimental field studies have been performed with the operating municipal 10 kV feeder and twelve 10/0.4 kV step-down transformers. The synchronized measurements of the phase voltages and currents have been executed with specially designed experimental 24 bit sigma-delta ADC IED with 10 minute periodicity at 40 ms intervals with a sampling frequency of 16 kHz in low voltage buses of all 12 substations and in the supply center of the feeder. The results of experimental studies have shown that algorithmic compensation of phase shift can improve the accuracy of measurements synchronization up to 0.5-3 microsecond.

Oleh Velychko, Stanislav Karpenko
Remote calibration of precision working standards of electric power

Results of the research possibility of realization the system of remote calibration of precision working standards of electric power are presented. The analysis and research of the previously applied principles and methods for the realization of remote calibration of precision working standards of electric power were done. General operation algorithm, structural and functional scheme were developed also. Measurement model and the analysis of components of expended measurement uncertainty were described for first time.

Daniel M. Toma, Joaquin del Rio, Enoc Martínez, Eric Delory, Jay Pearlman, Christoph Waldman, Simon Jirka
Interoperable Data Management and Instrument Control Architecture for Ocean Observing Systems

The complexity of marine installations for the ocean observing systems has grown significantly in recent years. In a network consisting of tens, hundreds or thousands of marine instruments, manual configuration and integration becomes very challenging. Simplifying the integration process in existing or newly established observing systems would have benefit system operators and is important for the broader application of different sensors. This article presents an approach for the automatic configuration and integration of sensors into an interoperable Sensor Web infrastructure. First, the sensor communication model, based on OGC's SensorML standard, is utilized. It serves as a generic driver mechanism since it enables the declarative and detailed description of a sensor's protocol. Finally, we present a data acquisition architecture based on OGC PUCK protocol that enables storage and retrieval of the SensorML document from the sensor itself, and automatic integration of sensors into an interoperable Sensor Web infrastructure.