Hisaya Imai

Learn More
The nature of the chiasma as a cytological parameter for analysing cross-over was reexamined quantitatively by an improved chiasma graph method. It was reconfirmed in Mus platythrix (n =13) that interstitial chiasmata at diakinesis are distributed randomly and almost uniformly along bivalents except for the centromere and telomere regions. The size of these(More)
Vertical double diffused MOSFET (VDMOS) is an established technology for high-current power-switching applications such as automotive circuits. The most serious failure mode is destructive damage during inductive switching, resulting from avalanche breakdown of the forward-blocking junction in the presence of high current flow. Improving the ruggedness of(More)
Amplitude of 1/f noise in NMOS and PMOS FETs has a strong dependency on bias conditions. Gate and drain bias dependencies of the noise were investigated in a wide operation range that covers both linear and saturation regions. The results are discussed referring to Hooge's empirical relationships commonly observed for the 1/f noise in semiconductor(More)
Some basic concepts of chiasma (including chiasma distribution, chiasma frequency, interstitial and terminal chiasmata, and chiasma interference) are reexamined theoretically in the light of gene shuffling, and a new method for chiasma analysis termed the chiasma graph is proposed. Chiasma graphs are developed for three mammals with greatly different(More)
  • 1