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
Encomienda System and the New World Indians. by Michael Busbin Along with the Spanish conquest and exploration, came Spanish customs and traditions. They brought along with them a system of forced labor called the encomienda. An encomienda was a means of giving to a Spaniard a restricted set of property rights over Indian labor (Yeager, 843). The Crown in Spain gave this to the Spaniard. The Spaniard, or encomendero, in return extracted tributes from the Indians in form of goods, metals, money, and labor (Yeager, 843).