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In addition to stress data , ice mechanical properties of flexural strength , in-plane compressive strength , and elastic modules of ice samples were determined in a shipboard laboratory . The in-plane compressive stresses near the anode end were increased as a result of mass accumulation of electromigrated atoms in the grain boundaries there . BDM investigators measured in-plane compressive stresses in a multiyear floe in the eastern Arctic during October and November 1988 . These experiments have shown that at the island edges of the incompletely filled top layer , the in-plane atomic spacing is different from that of completed layers . The build-ups and relaxations of the in-plane compressive stresses continued during the rest of the electromigration test . Polarized neutron reflectivity with polarization analysis enables one to determine in-plane vectorial magnetic depth profiles . How much farther can longitudinal media ( with in-plane magnetiza-tion ) be pushed ? In addition to stress data , ice mechanical properties of flexural strength , in-plane compressive strength , and elastic modulus of ice samples in the vicinity of the stress gauges were determined in a shipboard laboratory .