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Profitability of sheep grazing in young conifer plantations of British Columbia...

Poster ; In British Columbia (BC), sheep grazing, as a silvopastoral system, is occasionally used as a biological weed control method in young conifer plantations. As it is a relatively new method in BC, there is presently a lack of information about the profitability of the practice. For instance, there is no scientific data about the gain in profitability as a function of the number of grazing treatments app...

Synthesis and thermal behavior of La9.33Si2Ge4O26 apatite for SOFCs

Powders of La2O3, GeO2 and SiO2 were dry milled in a planetary ball mill with different rotation speeds (150–350 rpm) and increasing milling times up to 35 h in order to obtain the La9.33Si2Ge4O26 apatite phase at room temperature. The results showed that the higher the rotation speed the lower the time required for the formation of the apatite phase. No reaction between the starting powders was observed at 150...

Produção compartilhada de conhecimentos nas ciências da nutrição, ciências soci...

Temperature dependence of the absorption coefficient in doped quantum wells

In this work we present a calculation of the infrared optical absorption coefficient for a Ga1-xAl xAs quantum well (QW) as a function of donor impurity concentration, compensation and temperature. We treat this problem using a Self-Consistent Method (SC) calculation taking into account donors as major impurities. The Variational Method was used to obtain the ground state wave-function of an electron bound to a...