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
Children are forced into labor for a number of reasons; the fundamental one is poverty, which makes families desperate for whatever insufficient salary a child can make to improve the income. Another factor may include the inaccessibility of schools in developing countries due to fees and they might think why not save money rather then let their kids buy shoes, books and uniform.