1. [PDF] A generalized formulation of dual radiation action.
The principal limitation of the formulation given here is that it applies only if one is dealing with one type of effect. Since a variety of effects, including ...
2. [PDF] Contemporary Mathematics - edu.tufts.sites
When X-rays are the ionizing radiation, we de- scribe some of the physics of the problem, and we give mathematical models which use the dual Radon transform and ...
3. Dual Radiation Targeting System - University at Buffalo
A UB medical student and professor invented technology used worldwide to increase surgical accuracy while reducing radiation exposure.
4. [PDF] SATURATION IN DUAL RADIATION ACTION CONF-8710260
The theory of dual radiation action (TDRA) was developed with the aim of applying microdosimetry to radiobiology. It therefore can deal only with the first ...
5. Controlling Radiation and Conduction Simultaneously - Semantic Scholar
Feb 24, 2020 · Any object with nonzero temperature emits thermal radiation described by the Stefan-Boltzmann law, and hence, thermal conduction is always ...
Any object with nonzero temperature emits thermal radiation described by the Stefan-Boltzmann law, and hence, thermal conduction is always accompanied by thermal radiation. Although a transformation theory has been proposed to control thermal conduction, a transformation theory has not yet been put forward to manipulate thermal radiation, let alone the thermal coupling between radiation and conduction (herein called multithermotics). To solve the problem, we establish the theory of transformation multithermotics to control radiation and conduction simultaneously. As model applications, we also design three devices with functions of cloaking, concentrating, and rotating. These devices are confirmed by transient finite-element simulations. As experimental suggestions, we further design transformation media with two homogeneous and isotropic materials to simplify fabrication. Our results provide general hints to multithermal management, and have potential applications in infrared camouflaging, solar-energy utilizing, etc.
6. What is Dual Source Dual Energy? - Siemens Healthineers USA
... radiation dose significantly. With the advantage of two measurement systems ... Transforming care delivery · Improving patient experience · Digitalizing ...
Siemens Healthineers DSDE allows incorporation of spectral data on your most challenging exams such as trauma, bariatric or pediatrics. A DS DE scan consists of when two CT datasets are acquired simultaneously with different kV and mA levels.
7. A Narrow Dual-Band Slot Antenna with Radiation Pattern ...
Abstract: A novel design method to transform the radiation patterns of a narrow slot antenna under its first and second modes is proposed.
See AlsoFragmental CatA novel design method to transform the radiation patterns of a narrow slot antenna under its first and second modes is proposed. Firstly, the far-zone radiated fields of the traditional slot antenna are deeply investigated at its first, second, and third modes. It demonstrates that the bidirectional radiation pattern is acquired for the first and third modes. By contrast, the second mode of the antenna commonly maintains the non-bidirectional radiation pattern. Secondly, the slot antenna is folded in order to transform its second mode into the bidirectional radiated fields. Thirdly, a linear slot is cut on the folded slot, aiming to reallocate its resonant frequency to the desired band. Finally, our proposed antenna is simulated and designed. The results show that the antenna is operated at around 2.50 GHz for the lower band and 4.23 GHz for the upper band, respectively. Most importantly, the second mode of the traditional slot antenna is successfully reshaped as the bidirectional pattern.
8. Real-time mixed reality display of dual particle radiation detector data
Jan 7, 2023 · Radiation imaging systems typically use double-scatter events of gamma rays or fast neutrons to reconstruct the incidence directional ...
Radiation source localization and characterization are challenging tasks that currently require complex analyses for interpretation. Mixed reality (MR) technologies are at the verge of wide scale adoption and can assist in the visualization of complex data. Herein, we demonstrate real-time visualization of gamma ray and neutron radiation detector data in MR using the Microsoft HoloLens 2 smart glasses, significantly reducing user interpretation burden. Radiation imaging systems typically use double-scatter events of gamma rays or fast neutrons to reconstruct the incidence directional information, thus enabling source localization. The calculated images and estimated ’hot spots’ are then often displayed in 2D angular space projections on screens. By combining a state-of-the-art dual particle imaging system with HoloLens 2, we propose to display the data directly to the user via the head-mounted MR smart glasses, presenting the directional information as an overlay to the user’s 3D visual experience. We describe an open source implementation using efficient data transfer, image calculation, and 3D engine. We thereby demonstrate for the first time a real-time user experience to display fast neutron or gamma ray images from various radioactive sources set around the detector. We also introduce an alternative source search mode for situations of low event rates using a neural network and simulation based training data to provide a fast estimation of the source’s angular direction....
9. Evidence for a Dual-Source Mechanism of THz Radiation from ...
Dec 16, 2009 · ... transform infrared spectroscopy. Unlike the recent theoretical predictions, the results provide strong evidence for a dual-source mechanism ...
The THz radiation emitted from rectangular mesas of single-crystal $\mathrm{Bi_2Sr_2CaCu_2O_{8+δ}}$ was studied using angular distribution measurements and Fourier transform infrared spectroscopy. Unlike the recent theoretical predictions, the results provide strong evidence for a dual-source mechanism in which the uniform and non-uniform parts of the $ac$-Josephson current act as electric and magnetic current sources, respectively. The latter synchronizes with cavity modes of the mesa with integral harmonics of the fundamental radiation.
10. Application of Dual-Frequency Ultrasound to Radiation-Induced ...
Application of Dual-Frequency Ultrasound to Radiation-Induced Fibrosis ... transforming growth factor β1 (TGF-β1) activity resulting in fibrosis mechanism.
Yean Su Choi, and Eun Soo Park. Med Lasers 2017;6:86-9. https://doi.org/10.25289/ML.2017.6.2.86
11. Selective CO2 reduction to CH3OH over atomic dual-metal sites ...
Aug 8, 2023 · The efficient use of renewable X/γ-rays or accelerated electrons for chemical transformation of CO2 and water to fuels holds promise for a ...
The efficient use of renewable X/γ-rays or accelerated electrons for chemical transformation of CO2 and water to fuels holds promise for a carbon-neutral economy; however, such processes are challenging to implement and require the assistance of catalysts capable of sensitizing secondary electron scattering and providing active metal sites to bind intermediates. Here we show atomic Cu-Ni dual-metal sites embedded in a metal-organic framework enable efficient and selective CH3OH production (~98%) over multiple irradiated cycles. The usage of practical electron-beam irradiation (200 keV; 40 kGy min−1) with a cost-effective hydroxyl radical scavenger promotes CH3OH production rate to 0.27 mmol g−1 min−1. Moreover, time-resolved experiments with calculations reveal the direct generation of CO2•‒ radical anions via aqueous electrons attachment occurred on nanosecond timescale, and cascade hydrogenation steps. Our study highlights a radiolytic route to produce CH3OH with CO2 feedstock and introduces a desirable atomic structure to improve performance. Most approaches for CH3OH production focus on thermochemical, electrolytic, and photolytic processes. Here the authors report a radiolytic route to produce CH3OH from CO2 and water by atomic Cu-Ni dual sites embedded in a metal-organic framework.
