We propose a redesign method for modal parameters to depress the second resonance peak of an ultraslim optical pickup actuator. With the addition of the countermode near the second resonance frequency, we can achieve the gain margin, which is sufficient to meet the system requirement. It would alleviate the burden of the additional filter for a high-speed drive.

BackgroundNonabsorbable sutures are favorable for repairing flexor tendons. However, absorbable sutures have performed favorably in an animal model.MethodsTwo-strand sutures using the interlocking modified Kessler method with polydioxanone absorbable sutures 4-0 were used to repair completely ruptured flexor tendons in 55 fingers from 41 consecutive patients. The medical records of average 42 follow up weeks were analyzed retrospectively. The data analyzed using the chi-squared test, and Fisher's exact test was used for postoperative complications. The results were compared with those of other studies.ResultsAmong the index, middle, ring, and little fingers were injured in 9, 17, 16, and 13 fingers, respectively. The injury levels varied from zone 1 to 5. Of the 55 digits in our study, there were 26 (47%) isolated flexor digitorum profundus (FDP) injuries and 29 (53%) combined FDP and with flexor digitorum superficialis injuries. Pulley repair was also conducted. Concomitant injuries of blood vessels and nerves were found in 17 patients (23 fingers); nerve injuries occurred in 5 patients (10 fingers). Two patients had ruptures (3.6%), and one patient had two adhesions (3.6%). Using the original Strickland criteria, all the patients were assessed to be excellent or good. Also, fibrosis and long-term foreign body tissue reactions such as stitch granuloma were less likely occurred in our study. Compared to the Cullen's report that used nonabsorbable sutures, there was no significant difference in the rupture or adhesion rates.ConclusionsTherefore, this study suggests that appropriate absorbable core sutures can be used safely for flexor tendon repairs.

The aim of this study is to determine the factors influencing the acceptance of toenail-to-fingernail transfer. A total of 240 patients were divided into four groups according to severity of nail injury. Half (expensed informed [EI] group) were informed about the expenses (about $9,000) before the interview; the other half were not informed (the expense not-informed [ENI] group). The participants were asked to answer yes or no to the question "If you lose your fingernail and it can be reconstructed by transferring your toenail like this figure, will you undergo surgery? If you want it or not, please choose the reason for your choice." In the EI group, 68.3% accepted the surgery. In the ENI group, 85.0% accepted the surgery. There was a significant difference between the EI and ENI groups (p = 0.002). In the EI group, the age of the surgery acceptance group (36.9 ± 11.8) was significantly lower (p = 0.004) than that of the surgery rejection group (44.5 ± 15.5). The young age group wished to accept the surgery irrespective of the expenses, yet the old age group hesitated to have surgery when informed about the expenses. We think the risk acceptance for toenail-to-fingernail transfer mostly depends upon the expense.