Development and Characterization of Sol-gel Derived Al Doped ZnO/p-Si Photodiode

The effect of Al doping on the J-V characteristics sol-gel derived of ZnO/p-Si photodiodes was investigated.The resistivity of Si was 0.1Ω·cm.ZnO films annealed at 500℃ were of the best quality.To investigate the spectral response of the photodiodes,the J-V characteristics were measured under different monochromatic lights at wavelength 420,530,570 and 630 nm.The diodes exhibit strong responsivity in the blue region at 420 nm.The responsivity is 0.22 A/W for Al doped （0.8 wt pct） photodiode,whereas for the undoped photodiode,it was much lower.An estimate of the responsivity as a function of wavelength has been made in terms of the width of depletion region of photodiodes.

Effect of anaesthesia on the perioperative outcomes of pelvi-acetabular fracture surgeries in the apex trauma centre of a developing country–a retrospective analysis

Background:Regional anaesthesia has been proposed to reduce intraoperative blood loss,duration of hospital stay and in-hospital complications with improved postoperative pain control.General anaesthesia is advantageous for prolonged surgeries.We hypothesized that combined regional and general anaesthesia would offer advantages of both in pelvi-acetabular fracture surgeries.Methods:We identified 71 patients who underwent open reduction and internal fixation of pelvi-acetabular fractures from May 2012 to 2013 in our trauma centre.We excluded patients with incomplete records(n=4)and other injuries operated along(n=8).Hence,59 patients were divided into three groups:G group(general anaesthesia),R group(regional anaesthesia)and GR group(combined regional and general anaesthesia).Main outcome measurements studied were intraoperative blood loss,duration of hospital stay,duration of surgery and intraoperative and postoperative complications.Results:No differences were obtained in between the groups in terms of age,gender,Injury Severity Score,number of comorbidities,or duration from injury to surgery.No significant differences were found between the three groups for intraoperative blood loss,days of hospital stay and duration of surgery.Intraoperative and postoperative complications were also comparable between the groups(p>0.05).Conclusions:There is no specific significant advantage of the technique of anaesthesia on the observed perioperative complications in pelvi-acetabular fracture surgeries.