To obtain such positron microbeam, it is necessary to use objective lenses, which are commonly used in the electron microscopy. We also attempted to form the positron microbeam using a positron beam for the positron diffraction experiment and a SEM optics [6]; [7] ; [8].
Publicly Traded Companies that Benefited from Forced or Slave Labor, 1929-1945 CalPERS
Latin America became part of the world economy as a dependent region. Thus, the use of labor systems in Latin America from the 1750-1914 was a process with tremendous impact on the people and on the world in general. Slavery was based on using the enforced labor of other people .