Llewellyn, M. A., Tilak, K. S., and Swyer, P. R. (1970). Archives of Disease in Childhood, 45, 453. A controlled trial of assisted ventilation using an oro-nasal mask. A controlled study was performed to assess the effect of early assisted ventilation using a tight fitting face mask. Early mask ventilation reduced the number of infants requiring intubation, but did not significantly alter the s...

SUMMARY Isotropic etching of silicon in HF based solutions is expected to be controlled by the diffusion of fluorine to the silicon surface. In order to gain quantitative understanding of the process we studied etching of Si in HF/HNO 3 /H 2 O via circular mask openings and compared the results with the theoretical expectations. The cavity edges due to etching under the mask were analyzed with ...

Isotropic etching of silicon in HF-based solutions is expected to be controlled by the diffusion of fluoride to the silicon surface. In order to gain quantitative understanding of the process, we studied etching of silicon in HF/HNO3/H2O via circular mask openings and compared the results with the theoretical expectations. The cavity edges due to etching under the mask were analyzed with a high...

BACKGROUND Premedication is required for reducing anxiety and child's struggling against mask acceptance on anesthesia in pediatric surgery for congenital heart disease. Midazolam has been widely used for this purpose, but because of its side effects, finding an effective replacement with less complication is necessary. OBJECTIVES In the present study, we compared the efficacy of oral midazol...

Fingernails structure are rich in orientation, ridges and edge features. Inspired by Edge Histogram Descriptor (EHD), this paper presents an efficient orientation-based local descriptor, named histogram of orientation delineate (HROD). HROD is based on the fact that human vision sensitive to features for image perception. For a given image, algorithm first execute perform pre-process i.e., re-s...

5 Mason DG, Bingham RM. The laryngeal mask airway in children. Anaesthesia 1990; 45: 760-3. 6 Collier C. A hazard with the laryngeal mask airway (Letter). Anaesth Intensive Care 1991; 19: 301. 7 Silk JM, Hill HM, Calder I. Difficult intubation and the laryngeal mask. Eur J Anaesth 1991; $4: 47-51. 8 Nandi PR, Charlesworth CH, Taylor S J, Nunn JE Dore CJ, Effect of general anaesthesia in the pha...

Wet etching of glass by hydrofluoric acid is widely used in microfabrication, but is limited by the isotropic nature of the process that leads to rounded sidewalls and a 90 degrees angle between the etch front and the surface of the substrate. For many applications such as microvalving, or for further processing such as spin-coating, well controlled, gently sloping sidewalls are often preferred...

OBJECTIVES We compared the expelled air dispersion distances during coughing from a human patient simulator (HPS) lying at 45° with and without wearing a surgical mask or N95 mask in a negative pressure isolation room. METHODS Airflow was marked with intrapulmonary smoke. Coughing bouts were generated by short bursts of oxygen flow at 650, 320, and 220L/min to simulate normal, mild and poor c...

INTRODUCTION Accurate localisation is an essential component for the delivery of intracranial stereotactic treatment. For fractionated stereotactic radiotherapy, we compared the daily localisation accuracy of a standard thermoplastic mask with a new maxillary fixation device (MFD). METHODS Daily pre-treatment kV cone-beam computed tomography (CBCT) scans of 23 patients (12 localised in the MF...

We developed a consistent mathematical model for isotropic crystal growth on a substrate covered by the mask material with a periodic series of parallel long trenches where the substrate is exposed to the vapor phase. Surface diffusion and the flux of particles from vapor are assumed to be the main mechanisms of growth. A geometrical approach to the motion of crystal surface in two dimensions i...