Results 101 to 110 of about 410,519 (339)
Journal of Applied Clinical Medical Physics, EarlyView.Abstract The thermoluminescence dosimeter (TLD) sheet is a measurement device coated with manganese‐doped LiB3O5 in sheet form. The sheet is 0.2‐mm thick and flexible. Hence, it can fit and be installed on irregular surfaces. The current study aimed to evaluate the feasibility of measuring patient surface doses during radiation therapy using TLD sheets.
Yuya Miyasaka +8 more
wiley +1 more source
On polynomial mappings from the plane to the plane [PDF]
arXiv, 2012 Let f be a generic polynomial mapping mapping from the plane to the plane. There are constructed quadratic forms whose signatures determine the number of positive and negative cusps of f.
arxiv
The Quaternion Group in Plane Geometry [PDF]
Proceedings of the American Mathematical Society, 1968 Pl(1, 0), P1 (- 1, 0); P2(o, 0), P2 (-a, 0); P3(r, 0), P3 (-r, 0). We know that the harmonic conjugate of (o, 0) with respect to (1, 0), (-1, 0) is (r-1, 0) and since a2 -1, we have a-1 . i.e. P2, P' are harmonic conjugates with respect to P1, P'; so are P3, P3'.
openaire +1 more source
Journal of Applied Clinical Medical Physics, EarlyView.Abstract Skin flash is typically added to breast and chestwall plans to ensure robust target coverage in the presence of respiratory motion, anatomic changes, and small setup uncertainties. Adding skin flash in volumetric modulated arc therapy (VMAT) plans is an iterative and manual process.
Emily Hubley +6 more
wiley +1 more source
A new twist on the geometry of gravitational plane waves
Journal of High Energy Physics, 2017 The geometry of twisted null geodesic congruences in gravitational plane wave spacetimes is explored, with special focus on homogeneous plane waves.
Graham M. Shore
doaj +1 more source
Journal of Applied Clinical Medical Physics, EarlyView.Abstract Purpose Single‐isocenter multitarget (SIMT) radiosurgery has become increasingly popular as advancement in planning and delivery systems have made this approach clinically viable. With targets varying in size and distance from isocenter, SIMT plans are highly complex with dynamic multileaf collimator (MLC) motion.
Hem Moktan +3 more
wiley +1 more source
A generalisation of the nine-point circle and Euler line
Pythagoras, 2005 To most people, including some mathematics teachers, geometry is synonymous with ancient Greek geometry, especially as epitomised in Euclid's Elements of 300 BC.
Michael de Villiers
doaj +1 more source
Enumerative geometry of hyperelliptic plane curves [PDF]
arXiv, 1998 We recursively compute the Gromov-Witten invariants of the Hilbert scheme of two points in the plane. By studying the space of stable maps and computing virtual contributions, we use these invariants to enumerate hyperelliptic plane curves of degree d and genus g passing through 3d+1 general points.
arxiv
Journal of Applied Clinical Medical Physics, EarlyView.Abstract Purpose Studies on deep learning dose prediction increasingly focus on 3D models with multiple input channels and data augmentation, which increases the training time and thus also the environmental burden and hampers the ease of re‐training. Here we compare 2D and 3D U‐Net models with clinical accepted plans to evaluate the appropriateness of
Rosalie Klarenberg +2 more
wiley +1 more source