Effect of Bulk Nitriding on Magnetic Properties of Iron

Metal Science and Heat Treatment - Results of a study of nitriding of iron with the use of boron, aluminum and silicon nitrides are presented. It is shown that the method suggested, which involves...     

Metamaterial for efficient second harmonic generation

A theoretical study is carried out of the possibility of effective second-harmonic generation in a metamaterial representing a structure of alternating layers of semiconductor material with intrinsic and metallic conductivity that can be grown by epitaxial methods.     

Calculation of Rock Mass Deformation around Deep-Buried Underground Openings,Considering Weight of the Overlying Strata

The analytical estimates of stress state of surrounding rock mass around underground openings neglect the overlying strata weight, which results in the disagreement between the calculated and in situ measured displacements. The authors propose the phenomenological theory of deformation in order to eliminate the mentioned inconsistency. The theory is based on the fact that the direction of the roof rock weight load coincides with the orientation of tensile stresses found in an auxiliary problem. The authors introduce a parameter characterizing ratio of roof rock displacements to floor rock displacements, which allows solving inverse problems using the basic supplement—in situ measured displacements in the floor and roof rocks.