Wyniki wyszukiwania - BazTech

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Constraints of the MAX4781 CMOS Solution for Electrode Switching in Multilayer Electrochemical Probes

Cimpoiasu V.M., Radulescu F., Nealson K.H., Moga Ioana Corina, Popa R.

Archives of Metallurgy and Materials

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2022

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Vol. 67, iss. 2

691--694

EN

The most common means to analyze redox gradients in sediments is by push/pulling electrochemical probes through sediment’ strata while repeating measurements. Yet, as electrodes move up and down they disrupt the texture of the sediment layers thus biasing subsequent measurements. This makes it difficult to obtain reproducible measurements or to study the evolution of electrochemical gradients. One solution for solving this problem is to eliminate actuators and electrode movements altogether, while instead deploying probes with numerous electrodes positioned at various depths in the sediment. This mode of operation requires electrode switching. We discuss an electrode-switching solution for multi-electrode probes, based on Complementary Metal-Oxide-Semiconductor (CMOS) multiplexors. In this solution, electrodes can be individually activated in any order, sequence or time frame through digital software commands. We discuss constraints of CMOS-based multilayer electrochemical probes during cyclic voltammetry.

2

Plate kinematics studies in Romania using GPS

Becker M., Ghitau C., Marcu C., Radulescu F., Reinhart E., Rosca V., Rus T.

Reports on Geodesy

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1998

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z. 9/39

89-103

EN

The Central European Regional Geodynamic Project (CERGOP) was established to integrate geodynamic research in the Central European Region including 11 countries and using space geodetic techniques - mainly GPS. The geodetic network established-CEGRN (Central European GPS Geodynamic Reference Network) provides a stable and reliable reference frame. CEGRN actually represents a powerful tool in order to perform regional and subregional geotectonic investigations, too. In the CERGOP frame 4 main and 4 additional GPS stations were established in Romania. The GPS sites are selected to represent specific tectonic units. GPS observations were carried out at all 8 stations during the 1995, 1996 and 1997 CEGRN campaigns. This paper intends to present the first results from the BKG processing center with regard to plate kinematics in Romania based on the GPS observations 1995, 1996 and 1998. Plans for long-term observations and network densification are discussed.

3

Geodetic and geodynamic data on the recent crustal movements

Radulescu F., Nacu V., Biter M.

Reports on Geodesy

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1998

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z. 7/37

231-242

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Deep seismic data in Romania

Radulescu F., Diaconescu M.

Reports on Geodesy

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1998

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z. 7/37

177-192