Results 101 to 110 of about 1,048,468 (267)

Planar antennas [PDF]

IEEE Microwave Magazine, 2006
This article reviews the state of the art in broadband antennas for emerging UWB applications and addresses the important issues of the broadband antenna design for UWB applications. First, a variety of planar monopoles with finite ground planes are reviewed. Next, the roll antennas with enhanced radiation performance are outlined.
Cheng, Zhi Ning, Ammann, Max, Qing, Xianming, Wu, Xuan Hui, See, T. S.P., Cai, A.   +5 more
openaire   +2 more sources

Demonstration of an enhanced dosing pattern for debulking large and bulky unresectable tumors via differential hole‐size spatially fractionated radiotherapy

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Purpose/objective We propose a novel lattice deployment for spatially fractionated radiotherapy (SFRT) treatments. In this approach, a larger diameter high‐dose sphere is centrally placed in the bulky tumor mass and surrounded by smaller diameter high‐dose spheres.
Joshua Misa, William St. Clair, Damodar Pokhrel   +2 more
wiley   +1 more source

Under-Coupling Whispering Gallery Mode Resonator Applied to Resonant Micro-Optic Gyroscope

Sensors, 2017
As an important sensing element, the whispering gallery mode resonator (WGMR) parameters seriously affect the resonant micro-optic gyroscope (RMOG) performance.
Kun Qian, Jun Tang, Hao Guo, Wenyao Liu, Jun Liu, Chenyang Xue, Yongqiu Zheng, Chengfei Zhang   +7 more
doaj   +1 more source

Enumeration of Planar Constellations

Advances in Applied Mathematics, 2000
The enumeration of transitive ordered factorizations of a given permutation is a combinatorial problem related to singularity theory. Let $n\ge 1$, $m \ge 2$, and let $\si_0$ be a permutation of $\Sn_n$ having $d_i$ cycles of length $i$, for $i \ge 1$. We prove that the number of $m$-tuples $(\si_1, \ldots ,\si_m)$ of permutatinos of $\Sn_n$ such that:
Bousquet-Melou, Mireille, Schaeffer, Gilles   +1 more
openaire   +3 more sources

On planar caustics [PDF]

Journal of Knot Theory and Its Ramifications, 2016
We study local invariants of planar caustics, that is, invariants of Lagrangian maps from surfaces to [Formula: see text] whose increments in generic homotopies are determined entirely by diffeomorphism types of local bifurcations of the caustics.
Victor Goryunov, Katy Gallagher
openaire   +2 more sources

Dosimetric evaluation and clinical application of collimated apertures with proton beam line scanning in stereotactic radiotherapy

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Purpose Stereotactic radiotherapy (SRT) is a highly effective treatment with precision for small, localized lesions. Proton therapy, characterized by the Bragg peak, offers superior dose conformity compared to photon‐based approaches. However, challenges remain in minimizing lateral penumbra and optimizing dose delivery, particularly for small
Chen‐Yu Chou, Hsiao‐Chieh Huang, Shen‐Hao Lee, Shih‐Ming Hsu   +3 more
wiley   +1 more source

Quasi-planar optics: computing light propagation and scattering in planar waveguide arrays

, 2009
We analyze wave propagation in coupled planar waveguides, pointing specific attention to modal cross-talk and out-of-plane scattering in quasi-planar photonics.
Barnes, Bozhevolnyi, Bozhevolnyi, Chen, Chen, Clarricoats, Dolling, Elser, Govyadinov, Jacob, Justin Elser, Liu, Liu, Maier, Moharam, Oulton, Pendry, Reinhardt, Salandrino, Shalaev, Shin, Smolyaninov, Smolyaninov, Smolyaninov, Sondergaard, Stockman, Sukosin Thongrattanasiri, Thongrattanasiri, Viktor A. Podolskiy, Vlasov, Wangberg, Yao, Zia   +32 more
core   +1 more source

Stacked planar optics: an application of the planar microlens

Applied Optics, 1982
In this paper we present a new development of the distributed-index planar microlens of 2.5-3-mm focal length and 0.15 N.A. and also show that it is usable with optical components in fiber communications. We then propose a concept of stacked planar optics consisting of a stack of arrayed planar microlenses and other optical components.
Yasuo Kokubun, Masahiro Oikawa, Shigeyoshi Misawa, Junichi Banno, Kenichi Iga   +4 more
openaire   +3 more sources

Radiotherapy medical physics in the Philippines: A contemporary overview

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Purpose With cancer ranking as the third leading cause of death in the Philippines and a disparity in healthcare resources across regions, this research aimed to assess the state of radiotherapy medical physics in the country. Methodology The study utilized a comprehensive online survey with 94 structured questions answered by 19 clinics ...
John Paul C. Cabahug, Ramon Carlo Cruzpero, Luis E. Fong de los Santos, Eric C. Ford, Afua A. Yorke   +4 more
wiley   +1 more source

Comprehensive end‐to‐end dosimetry audit for stereotactic body radiotherapy in spine, lung, and soft tissue

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Purpose To create and conduct a comprehensive onsite end‐to‐end dosimetry audit to assess treatment accuracy of spine, lung, and soft tissue Stereotactic Body Radiotherapy (SBRT) across Australian and New Zealand (ANZ) radiotherapy centers. Methods The Australian Clinical Dosimetry Service (ACDS) anthropomorphic thorax phantom underwent a CT ...
Maddison Shaw, Andrew Alves, Jessica Lye, Joerg Lehmann, Fayz Kadeer, Sabeena Beveridge, Nicholas Hardcastle, Moshi Geso, Rhonda Brown   +8 more
wiley   +1 more source