The vacuum expectation values of the field squared and the energy-momentum tensor are investigated for a scalar field with Dirichlet boundary conditions and for the electromagnetic field inside a wedge with a coaxial cylindrical boundary. In the case of the electromagnetic field perfectly conducting boundary conditions are assumed on the bounding surfaces. By using the Abel-Plana-type formula f...

A case of duodenal gastrointestinal stromal tumor (GIST) treated by wedge resection in a patient with neurofibromatosis type 1 (NF-1) is reported. A 55-year-old man with a history of NF-1 was admitted for surgery for a duodenal tumor. Upper gastrointestinal endoscopy revealed a 2.5 cm duodenal submucosal tumor. Abdominal computed tomography showed a homogenously enhanced mass in the third porti...

2014 Regularly spaced singular lines appear when a cholesteric liquid crystal flows between glass plates inclined at a small wedge angle and remain after the flow ceases. The glass plates are treated to give homeotropic pinning at the surfaces, but the flow effectively creates a region of soft homogeneous pinning slightly away from the surfaces, thus simulating the conditions for development of...

TomoTherapy Quality Assurance (TQA) is a software package developed to monitor certain aspects of machine performance. In this study, the TQA quantities or data trends most effective in monitoring energy drifts and magnetron stability were determined respectively. This retrospective study used data collected from three TomoHD units. The TQA modules investigated were Step-Wedge Helical, Step-Wed...

TM scattering problem by a perfectly conducting wedge with concaved edge is formulated for a line source excitation using the modematching technique. The scattered and guided fields are represented in terms of an infinite series of radial waveguide modes with unknown coefficients. By applying the appropriate boundary conditions, the coefficients of scattered field are obtained. For small ka, th...

original article   one type of electromagnetic fields, based on frequency range, is extremely low frequency (elf) fields. there are lots of reports about measuring elf-magnetic field (mf) in substations, power plants, cities and etc. this study aimed to compare the difference between measurement of three-axis and single-axis probe mf meters. elf-mf was measured by tes-1394 mf tester (three-axis...

Introduction: Today, radiotherapy combined with surgery in the treatment of parotid tumors widely are used specially for high grade parotid tumors. One of concern and challenge issue of radiotherapy is that the treatment of these tumors with irregular surface due to the presence of external ear and region of different physical electron density (air cavities, dense bone, soft t...

Correspondence to Dr W. F. Hoyt, c/o The Editorial Office, Department of Neurological Surgery, 350 Parnassus Avenue, Suite 807, San Francisco, California 94143. USA. dioptre spherical lenses. Both her colour vision and her pupillary reactions to direct light stimulation were normal. An examination of the visual fields revealed symmetrical, absolute, steep-edged, wedge-shaped defects that broke ...

Acute macular neuroretinopathy is an infrequently encountered condition in which there is a sudden mild central vision loss, photopsia and red-brown wedge-shaped lesions in the macular region with corresponding scotomata in the central visual fields. The condition may be associated with the use of oral contraceptives or with a recent febrile illness. It is self-limiting and non-recurrent. The c...