In this paper, we investigate the simplest wormhole solution—the Ellis–Bronnikov one—in context of asymptotically safe gravity (ASG) at Planck scale. We work with three models, which employ Ricci scalar, Kretschmann and squared tensor to improve field equations by turning Newton constant into a running coupling constant. For all cases, check radial energy conditions solution compare them those ...

PURPOSE To develop a fast and generalizable method which can identify all possible hardware collisions specific to a given patient setup before treatment planning. METHODS An anthropomorphic phantom placed in a typical breast setup using a wingboard was simulated on a CT scanner and the phantom body contour, table, and gantry geometry were made into polygon meshes using 3D modeling software. ...

A comprehensive quality assurance (QA) device cum program was developed for the commissioning and routine testing of the 6D IGRT systems. In this article, both the new QA system and the BrainLAB IGRT system which was added onto a Varian Clinac were evaluated. A novel compound 6D-offset simulating phantom was designed and fabricated in the Prince of Wales Hospital (PWH), Hong Kong. The QA progra...

2D projections of the real 3D space are the only available information in the imaging technics like in XRay and MRI. In this paper we study projections of images as generated by Radon transformation. We implemented an image reconstruction algorithm which receives different projections of the original image as input. We performed this experiment using artificially created image in order to test ...

This study explores the potential of cone-beam computed tomography (CBCT) for monitoring relative beam range variations due to daily changes in patient anatomy for prostate treatment by anterior proton beams. CBCT was used to image an anthropomorphic pelvic phantom, in eight sessions on eight different days. In each session, the phantom was scanned twice, first at a standard position as determi...

Given a nite set V and a set function f : 2 V 7! Z, we consider the problem of constructing an undirected multigraph G = (V;E) such that the cut function c G : 2 V 7! Z of G and f together has value at least 2 for all non-empty and proper subsets of V . If f is intersecting submodular and posi-modular, and satis es the tripartite inequality, then we show that such a multigraph G with the minimu...

This paper presents an autonomous method t o calibrate jo in t torque sensors f o r advanced robots; as a by-product, the posi t ion sensors can also be calibrated. W h e n one jo in t of a manipulator is rotated, the gravity torque exerted on the jo in t varies sinusoidally wi th rotat ion angle. By means of sinusoidal curve fitting, the bias of the torque sensor and the gain of the posi t ion...