Results 41 to 50 of about 4,390 (171)

Conformal Dose Modulator for Proton Beam Therapy Part 1: A Simulation Study

Frontiers in Oncology, 2022
PurposeConformal dose deliveries in proton therapy utilize either a passive scattering system with a modulator or a pencil beam scanning (PBS) system. Efforts have been made to achieve conformal dose delivery by scanning a single energy layer of pencil ...
Zhexuan Zhang, Weizhao Zhao, Michael Butkus, Xiaodong Wu, Xiaodong Wu, Xiaodong Wu, Xiaodong Wu, Xiaodong Wu   +7 more
doaj   +1 more source

ESTRO-EPTN radiation dosimetry guidelines for the acquisition of proton pencil beam modelling data

Physics and Imaging in Radiation Oncology
Proton therapy (PT) is an advancing radiotherapy modality increasingly integrated into clinical settings, transitioning from research facilities to hospital environments.
Carles Gomà, Katrin Henkner, Oliver Jäkel, Stefano Lorentini, Giuseppe Magro, Alfredo Mirandola, Lorenzo Placidi, Michele Togno, Marie Vidal, Gloria Vilches-Freixas, Jörg Wulff, Sairos Safai   +11 more
doaj   +1 more source

Dual-Layer Beamscanning Reflectarray Antenna Operating at Ku-Band

Journal of High-Frequency Communication Technologies, 2023
This paper presents a beam scanning electronically reconfigurable reflectarray configuration for Ku-band applications using a single varactor diode.  A 15×15 center-fed reconfigurable reflectarray antenna is designed consisting of 225 octagonal shaped ...
Vidhyashree Suresh, Aishika Bhattacharjee, Kirubaveni Savarimuthu   +2 more
doaj   +1 more source

Mapping initial and general recombination in scanning proton pencil beams

Physics in Medicine & Biology, 2020
Abstract The ion recombination is examined in parallel-plate ionization chambers in scanning proton beams at the Danish Centre for Particle Therapy and the Skandion Clinic. The recombination correction factor k s
J B Christensen, E Almhagen, L Stolarczyk, M Liszka, G G Hernandez, N Bassler, O Nørrevang, A Vestergaard   +7 more
openaire   +2 more sources

Bamboo‐Slip‐Inspired Conformal Reconfigurable Metasurfaces

Advanced Science, EarlyView.
Bamboo‐slip‐inspired conformal reconfigurable metasurface system. The structure is mainly composed of three parts, which are conformal metasurface, pattern reconfigurable antenna, and control components (such as Field Programmable Gate Array (FPGA)). Conformal metasurfaces draw inspiration from the design of ancient Chinese bamboo slips.
Qifan Li, Shaofeng Zhang, Qiang Feng, Dexiao Xia, Yajie Mu, Xiangjin Ma, Jiaqi Han, Haixia Liu, Guangyao Liu, Long Li   +9 more
wiley   +1 more source

Dual-Mode Sea Ice Extent Retrieval for the Rotating Fan Beam Scatterometer

Remote Sensing
Scatterometers are highlighted in polar applications, such as sea ice extent retrieval. There are currently three types of spaceborne scatterometer in operation, among which the rotating pencil beam scatterometer and the rotating fan beam scatterometer ...
Liling Liu, Xiaolong Dong, Wenming Lin, Shuyan Lang   +3 more
doaj   +1 more source

Beam-shape loss for multiple-beam digital array radars

The Journal of Engineering, 2019
This study considers beam-shape loss (BSL) for pencil-beam digital array radars (DARs), when multiple simultaneous receive beams are formed to cover the volume illuminated by each transmit beam.
Yuan Yao, Guangxin Wu
doaj   +1 more source

Recent Advances in Programmable Metasurfaces and Meta‐Devices

Advanced Electronic Materials, EarlyView.
Programmable metasurfaces enable various novel functionalities by dynamically tuning electromagnetic wavefronts. This article provides a comprehensive review of recent advances in microwave and terahertz programmable metasurfaces, covering electrical, thermal, optical, and mechanical control mechanisms.
Linda Shao, Chong He, Nan Wang, Liming Si, Weiren Zhu   +4 more
wiley   +1 more source

A systematic study of independently-tuned room-specific PBS beam model in a beam-matched multiroom proton therapy system

Radiation Oncology, 2021
Background In the existing application of beam-matched multiroom proton therapy system, the model based on the commissioning data from the leading treatment room was used as the shared model.
Yu-Hua Huang, Chunfeng Fang, Tao Yang, Lin Cao, Gaolong Zhang, Baolin Qu, Yihang Zhang, Zishen Wang, Shouping Xu   +8 more
doaj   +1 more source

High‐Performance Noble‐Metal‐Free Perovskite Solar Cells Enabled by MoOX/Cr/Al Multilayer Electrodes

Advanced Energy Materials, EarlyView.
Cost‐effective perovskite solar cells (PSCs) are developed using a noble‐metal‐free MoOX/Cr/Al multilayer electrode. The devices achieve a power conversion efficiency (PCE) of 25.6%, competitive with that of Au‐based devices (26.3%), and a 25.5 cm2 mini‐module shows 21.3% PCE.
Wooyeon Kim, Soyeon Kim, In Choi, Seoyeong Lee, Subin Yu, Young Yun Kim, Bonkee Koo, Min Jae Ko   +7 more
wiley   +1 more source