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Multifunctional Aquatic Drones for surface waters (MaqD) is an operational tool, a "Water-mark" for "live,online dynamic monitoring" of aquatic environments in-situ. For surface running water, for lakes and / oroffshore, MAqD in the image below represents a radically new approach for in-situ robust, reliable andenvironmentally responsible water monitoring.

43rd International Symposium on Agricultural Engineering -- FEB 24-27, 2015 -- Opatija, CROATIA Alexandru, Constantin Gabriel/0000-0002-0051-4242; Constantin, Gabriel-Alexandru/0000-0002-0051-4242; Biris, Sorin Stefan/0000-0002-3399-2937; VLADUT, Valentin Nicolae/0000-0002-2226-4141 WOS: 000373450700002 Artificial compaction of agricultural soil consists in the increase of soil bulk density, respectively in the decrease of soil porosity, especially due to the contact with the tires or tracks of tractors and agricultural machinery. This paper aims to determine the pressure on the soil, by simulating real field conditions in the laboratory. Experiments were conducted using a complex testing system in accelerated regime, which can simulate the static pressure at compression of the tires on the soil (stationary machinery). For each experiment were taken into account: the dimensional characteristics of the tires, testing conditions in operation and also the dynamic characteristics of the tires (when tested in real conditions). Univ Zagreb, Fac Agr, Univ Osijek, Fac Agr, Agr Engn Dept, Univ Maribor, Fac Agr Life Sci, Agr Inst Slovenia, Agr Engn Inst Godollo, Croatian Agr Engn Soc, Ministarstvo Znanosti, Obrazovanja Sporta Republike Hrvatske, INA, Same Deutz Fahr Zetelice, Messis, Agrogrom, Findri, Geomatika Smolak, Agromarketing, Asian Assoc Agr Engn, EurAgEng, CIGR