Studies of the internal structure of electrical devices and the archaeological heritage by the method of neutron radiography and tomography

The paper presents the results of the study of a series of objects of electrical devices and archaeological heritage by the method of neutron radiography and tomography (VL-10 diode, spark plug, bell, ancient ring, stone). It is shown that the method of neutron radiography and tomography reliably works on samples made of various materials. Neutron radiographic and tomographic studies of the VL-10 diode gave an idea of the internal structure of the diode. Experiments with spark plugs have revealed the causes of its faulty function. According to the tomographic results of the bell, ring and stone, the heterogeneous areas in the internal volume of these objects were revealed. The results obtained are the basis for further research in the field of archaeological heritage and technical devices for special purposes.

Structure of Zhou Nil-clean Rings

A ring R is Zhou nil-clean if every element in R is the sum of two tripotents and a nilpotent that commute. Homomorphic images of Zhou nil-clean rings are explored. We prove that a ring R is Zhou nil-clean if and only if 30 ϵ R is nilpotent and R/30R is Zhou nil-clean, if and only if R/BM(R) is 5-potent and BM(R) is nil, if and only if J(R) is nil and R/J(R) is isomorphic to a Boolean ring, a Yaqub ring, a Bell ring or a direct product of such rings. By means of homomorphic images, we completely determine when the generalized matrix ring is Zhou nil-clean. We prove that the generalized matrix ring Mn(R; s) is Zhou nil-clean if and only if R is Zhou nil-clean and s ϵ J(R).