Os homens famosos são, em geral, o produto de uma infância infeliz. A dura compressão das circunstâncias, as dores da adversidade, as esporas do desprezo e do escárnio na infância são necessárias para evocar a forte fixidez de propósito e inteligência tenaz, sem as quais as grandes ações raramente são praticadas.

Young modulus and toughness (K IC ) of bulk solar grade silicon (SoG-Si) obtained by directional solidification of metallurgical grade silicon were determined. The Young modulus was measured by the technique of impulse excitation of vibration and K IC was determined using the indentation method. Measurement values agree well with those available in the literature. The indentation method proved to be a reliable, relatively simple, inexpensive, and fast experimental method to measure K IC in SoG-Si.