We compared the efficiency and accuracy of full-arc and half-arc volumetric-modulated arc therapy (VMAT) delivery for maxillary cancer. Plans for gantry rotation angles of 360° and 180° (full-arc and half-arc VMAT) were created for six maxillary cancer cases with the Monaco treatment planning system, and delivered using an Elekta Synergy linear accelerator. Full-arc and half-arc VMAT were compa...

1. Executive Summary Arc fault current interruption (AFCI) is required on DC conductors of solar PV installations by NEC 2011 (rooftop systems only) and NEC 2014 (rooftop and ground mount systems). To meet these requirements, combiner boxes for central inverters will need to include arc fault detectors (AFDs) as well as other AFCI equipment. UL recognized AFDs greatly ease the process of listin...

Volumetric-modulated arc therapy (VMAT) is considered to deliver a better dose distribution and to shorten treatment time. There is a lack of research regarding breast irradiation after breast-conserving surgery (BCS) using VMAT with prone positioning. We developed a new small-arc VMAT methodology and compared it to conventional (fixed-field) intensity-modulated radiation therapy (IMRT) in the ...

Hexavalent chromium [Cr(VI)] and ozone are produced in many arc-welding processes. Cr(VI) is formed when welding with chromium-containing alloys and is a suspected carcinogen. Ozone is formed by the action of ultraviolet light from the arc on oxygen and can cause severe irritation to the eyes and mucous membranes. Previous work has demonstrated that reduction of sodium and potassium in manual m...

In this paper we discuss the radio arc at the galactic center to be the counterpart of the high-energy γ-ray source 2EG J1746-2852. Though 2EG J1746-2852 must be regarded as true source in excess of the diffuse background, its position cannot be determined to better than 0.3◦. The observed flux is constant within the statistical limits and the spectrum is very hard. The lack of variability make...

• Introduction to Advanced Life Support. ARC and NZRC Guideline 2010 • Cardiopulmonary Resuscitation for Advanced Life Support Providers. ARC and NZRC Guideline 2010 • Protocols for Adult Advanced Life Support. ARC and NZRC Guideline 2010 • Precordial Thump and Fist Pacing. ARC and NZRC Guideline 2010 • Electrical Therapy for Adult Advanced Life Support. ARC and NZRC Guideline 2010 • Medication...

To investigate the microphysics mechanism and the factors that influence arc development along a polluted surface, the arc was considered as a plasma fluid. Based on the image method and the collision ionization theory, the electric field of the arc needed to maintain movement with different degrees of pollution was calculated. According to the force of the charged particle in an arc plasma str...

PURPOSE To calculate an optimal collimator angle at each of sectional arcs in a full-arc volumetric modulated arc therapy (VMAT) plan and evaluate dosimetric quality of these VMAT plans comparing full-arc VMAT plans with a fixed collimator angle. METHODS Seventeen patients who had irregularly-shaped target in abdominal, head and neck, and chest cases were selected retrospectively. To calculat...