31. Wachs pointed to several trends : Job growth is greatest in low-density suburbs, where there is no cost-effective mass transit. 32. The temperature dependence of the oscillations reveals that the carriers have a non-zero cyclotron mass, despite their zero effective mass . 33. Physical parameters such as the bandgap and effective mass can also be obtained from the computed E ( k ). 34. Workers strike frequently in Russia, but aside from miners and energy workers they have yet to organize effective mass labor action. 35. He predicted existence of new ( additional, or Pekar ) light waves due to a small effective mass of electronic excitons. 36. This is in contrast to deep level donors where the short range potential determines the energy levels, not the effective mass states. 37. In practice, the effective mass extracted in this way is not quite constant in temperature ( does not exactly vary as ). 38. In any case, if the band structure has the simple parabolic form described above, then the value of effective mass is unambiguous. 39. From the analysis of the Shubnikov de Haas experiments, one can deduce the effective mass and the quantum lifetime of composite fermions. 40. Certain III-V compounds such as GaAs and InSb have far smaller effective masses than tetrahedral group IV materials like Si and Ge.
