Journal articles on the topic 'Radiation shaping'

To see the other types of publications on this topic, follow the link: Radiation shaping.

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Radiation shaping.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Zweigle, J. "Dynamical simulations of the shaping of PNe including radiation effects." Symposium - International Astronomical Union 180 (1997): 294. http://dx.doi.org/10.1017/s0074180900131110.

Full text
Abstract:
In order to investigate the shaping of aspherical planetary nebulae the gasdynamical conservation laws of mass, momentum and energy including radiation effects are solved numerically in twodimensional, spherical coordinates. The simulations describe the dynamical interaction of a fast, tenuous, spherically symmetric wind from the central star with the slow, dense, axisymmetric AGB-wind remnant and include photoionization, collisional ionization, collisional excitation, radiative recombination and forbidden line emission as radiation effects.
APA, Harvard, Vancouver, ISO, and other styles
2

Decataldo, D., A. Lupi, A. Ferrara, A. Pallottini, and M. Fumagalli. "Shaping the structure of a GMC with radiation and winds." Monthly Notices of the Royal Astronomical Society 497, no. 4 (August 11, 2020): 4718–32. http://dx.doi.org/10.1093/mnras/staa2326.

Full text
Abstract:
ABSTRACT We study the effect of stellar feedback (photodissociation/ionization, radiation pressure, and winds) on the evolution of a Giant Molecular Cloud (GMC), by means of a 3D radiative transfer, hydrosimulation implementing a complex chemical network featuring H2 formation and destruction. We track the formation of individual stars with mass $M\gt 1\, {\rm M}_{\odot }$ with a stochastic recipe. Each star emits radiation according to its spectrum, sampled with 10 photon bins from near-infrared to extreme ultraviolet bands; winds are implemented by energy injection in the neighbouring cells. We run a simulation of a GMC with mass $M=10^5\, {\rm M}_{\odot }$, following the evolution of different gas phases. Thanks to the simultaneous inclusion of different stellar feedback mechanisms, we identify two stages in the cloud evolution: (1) radiation and winds carve ionized, low-density bubbles around massive stars, while FUV radiation dissociates most H2 in the cloud, apart from dense, self-shielded clumps; (2) rapid star formation (SFR$\simeq 0.1\, {\rm M}_{\odot }\, {\rm yr}^{-1}$) consumes molecular gas in the dense clumps, so that UV radiation escapes and ionizes the remaining $\mathrm{H\,{\small I}}$ gas in the GMC. H2 is exhausted in 1.6 Myr, yielding a final star formation efficiency of 36 per cent. The average intensity of FUV and ionizing fields increases almost steadily with time; by the end of the simulation (t = 2.5 Myr) we find 〈G0〉 ≃ 103 (in Habing units), and a ionization parameter 〈Uion〉 ≃ 102, respectively. The ionization field has also a more patchy distribution than the FUV one within the GMC. Throughout the evolution, the escape fraction of ionizing photons from the cloud is fion, esc ≲ 0.03.
APA, Harvard, Vancouver, ISO, and other styles
3

Ayyangar, Komanduri. "Automatic field shaping for conformal radiation therapy." Computer Methods and Programs in Biomedicine 42, no. 4 (April 1994): 223–32. http://dx.doi.org/10.1016/0169-2607(94)90095-7.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Jarrahi, M. "Terahertz Radiation-Band Engineering Through Spatial Beam-Shaping." IEEE Photonics Technology Letters 21, no. 13 (July 2009): 830–32. http://dx.doi.org/10.1109/lpt.2009.2019620.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Eichenberger, Michael, Flavio Giorgianni, Nick Sauerwein, Carlo Vicario, and Christoph P. Hauri. "Deformable mirror for wavefront shaping of infrared radiation." Optics Letters 43, no. 9 (April 24, 2018): 2062. http://dx.doi.org/10.1364/ol.43.002062.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Wrona, Stanislaw, Marek Pawelczyk, and Xiaojun Qiu. "Shaping the acoustic radiation of a vibrating plate." Journal of Sound and Vibration 476 (June 2020): 115285. http://dx.doi.org/10.1016/j.jsv.2020.115285.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Gupta, Sanjay, and Asmita Sharda. "Chromatin landscape: Re-shaping radiation biology and oncology." Journal of Radiation and Cancer Research 8, no. 3 (2017): 121. http://dx.doi.org/10.4103/jrcr.jrcr_36_17.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Tsvetkov, A. D., and N. I. Potapova. "'Spekforms' — sintered components for shaping laser radiation wavefronts." Quantum Electronics 24, no. 1 (January 31, 1994): 78–80. http://dx.doi.org/10.1070/qe1994v024n01abeh000024.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Wang, Lei, Sergey Kruk, Lei Xu, Mohsen Rahmani, Daria Smirnova, Alexander Solntsev, Ivan Kravchenko, Dragomir Neshev, and Yuri Kivshar. "Shaping the third-harmonic radiation from silicon nanodimers." Nanoscale 9, no. 6 (2017): 2201–6. http://dx.doi.org/10.1039/c6nr09702b.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Cotter, G. W. "Adjustable field shaping for external-beam radiation therapy." Radiology 174, no. 3 (March 1990): 892–93. http://dx.doi.org/10.1148/radiology.174.3.2305076.

Full text
APA, Harvard, Vancouver, ISO, and other styles
11

Qu, Xiao Yun, and Zhi Qun Yang. "A Study on Beam Shaping of Helix Antenna." Applied Mechanics and Materials 313-314 (March 2013): 634–37. http://dx.doi.org/10.4028/www.scientific.net/amm.313-314.634.

Full text
Abstract:
By optimizing the related parameters of the helix antenna, the maximum radiation direction is changed from 0 degree to 90 degrees. The fast-wave mode is exited along the helix at the same time. The simulation result shows the magic beam shaping performance of helix antenna. The relationship among the radiation pattern, the working frequency, and the parameters of the helix is also described.
APA, Harvard, Vancouver, ISO, and other styles
12

Burlon, A. A., A. J. Kreiner, A. A. Valda, and D. M. Minsky. "An optimized neutron-beam shaping assembly for accelerator-based BNCT." Applied Radiation and Isotopes 61, no. 5 (November 2004): 811–15. http://dx.doi.org/10.1016/j.apradiso.2004.05.063.

Full text
APA, Harvard, Vancouver, ISO, and other styles
13

Grigor'yants, A. G., and A. I. Misyurov. "Shaping of deposited layers using laser pulsed-periodic Radiation." Welding International 22, no. 7 (July 2008): 468–71. http://dx.doi.org/10.1080/09507110802358685.

Full text
APA, Harvard, Vancouver, ISO, and other styles
14

Brown, R. C., P. J. B. Clarricoats, and H. Zhou. "Optimum shaping of reflector antennas for specified radiation patterns." Electronics Letters 21, no. 24 (1985): 1164. http://dx.doi.org/10.1049/el:19850823.

Full text
APA, Harvard, Vancouver, ISO, and other styles
15

Ivanova, T., K. Bliznakova, and N. Pallikarakis. "Simulation studies of field shaping in rotational radiation therapy." Medical Physics 33, no. 11 (October 23, 2006): 4289–98. http://dx.doi.org/10.1118/1.2358200.

Full text
APA, Harvard, Vancouver, ISO, and other styles
16

Gál, J. "Double gated-integrator for shaping nuclear radiation detector signals." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 462, no. 3 (April 2001): 506–18. http://dx.doi.org/10.1016/s0168-9002(01)00196-6.

Full text
APA, Harvard, Vancouver, ISO, and other styles
17

May, Matthias S., Michael Brand, Michael M. Lell, Martin Sedlmair, Thomas Allmendinger, Michael Uder, and Wolfgang Wuest. "Radiation dose reduction in parasinus CT by spectral shaping." Neuroradiology 59, no. 2 (January 16, 2017): 169–76. http://dx.doi.org/10.1007/s00234-016-1780-0.

Full text
APA, Harvard, Vancouver, ISO, and other styles
18

Walker, Robert B., Stephen J. Mihailov, Ping Lu, and Dan Grobnic. "Shaping the radiation field of tilted fiber Bragg gratings." Journal of the Optical Society of America B 22, no. 5 (May 1, 2005): 962. http://dx.doi.org/10.1364/josab.22.000962.

Full text
APA, Harvard, Vancouver, ISO, and other styles
19

Suparta, Gede Bayu, Arief Hermanto, Dwi Satya Palupi, and Yohannes Sardjono. "Optimization of double layered beam shaping assembly using genetic algorithm." Polish Journal of Medical Physics and Engineering 24, no. 4 (December 1, 2018): 157–64. http://dx.doi.org/10.2478/pjmpe-2018-0022.

Full text
Abstract:
Abstract The genetic algorithm method is a new method used to obtain radiation beams that meet the IAEA requirements. This method is used in optimization of configurations and compositions of materials that compose double layered Beam Shaping Assembly (BSA). The double layered BSA is modeled as having two layers of material for each of the components, which are the moderator, reflector, collimator, and filter. Up to 21st generation, the optimization results in four (4) individuals having the capacity to generate the most optimum radiation beams. The best configuration, producing the most optimum radiation beams, is attained by using combinations of materials, that is by combining Al with either one of CaF2 and PbF2for moderator; combining Pb material with either Ni or Pb for reflector; combining Ni and either FeC or C for collimator, and FeC+LiF and Cd for fast and thermal neutron filter. The parameters of radiation resulted from the four configurations of double layer BSA adequately satisfy the standard of the IAEA.
APA, Harvard, Vancouver, ISO, and other styles
20

Urzędowski, A., and D. Wójcicka-Migasiuk. "Shaping of Panel Materials in Light Direction Design." Archives of Metallurgy and Materials 61, no. 2 (June 1, 2016): 941–45. http://dx.doi.org/10.1515/amm-2016-0160.

Full text
Abstract:
Abstract The paper presents the methodology of the analysis of the materials used in solar energy conversion, and an elaborated example with simulations of obtained results. Material properties are selected in relation to the need of sunlight illumination applications in civil constructions. This process is presented , starting from the analysis of some aspects of solar radiation, through the calculations of lens curvature and leading to the execution of simulations in different conditions. Graphical presentation of the phenomenon, it can visualize the process of shaping curves. The materials such as glass, polymers, metals, and gases have been discussed. Particular attention was paid to the results of the transmission of materials, their reflection and absorption of solar radiation. Moreover, the research problems of illumination and reflection in multi-layer structures used for civil constructions have been presented.
APA, Harvard, Vancouver, ISO, and other styles
21

Bergmann, José R., and Fernando J. S. Moreira. "Omnidirectional Dual-Reflector Antenna with GO Shaped Main Reflector for Pattern Control in the Elevation Plane: OADC Case." International Journal of Antennas and Propagation 2012 (2012): 1–6. http://dx.doi.org/10.1155/2012/326925.

Full text
Abstract:
This paper presents a formulation for shaping the main reflector of an axis-symmetric dual-reflector antenna designed to offer an omnidirectional coverage with an arbitrary radiation pattern in the vertical plane. The subreflector is generated by an axis-displaced conic, and the main reflector is shaped to achieve a prescribed far-field radiation pattern. The procedure is based on geometrical optics (GO) principles. Two distinct far-field ray structures are explored and their limitations are identified. The GO shaping results are validated by analysis provided by the accurate method of moments technique.
APA, Harvard, Vancouver, ISO, and other styles
22

Park, Sangwon, Wheejae Kim, Dongjoon Kim, and No-Cheol Park. "Shaping acoustic radiation induced by vibrotactile rendering on a touch surface." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 263, no. 2 (August 1, 2021): 4322–28. http://dx.doi.org/10.3397/in-2021-2661.

Full text
Abstract:
Many electronic devices with touch-sensitive surfaces aim to provide vibrotactile feedback, along with visual or auditory feedback, to facilitate the interaction between the user and the interface. In parallel to these efforts, recent studies developed various vibration rendering techniques, enabling more complex vibration patterns to be generated on the touch surface. However, few have addressed sound radiation induced by vibrotactile rendering on a touch surface, which could significantly impact the haptic interaction's overall perception. This study presents a method to shape the acoustic radiation due to rendering high-fidelity vibrotactile feedback on a touch surface. The proposed method utilizes measured frequency response functions and a vibroacoustic representation of the touch surface to define the relationship between actuator driving signals, vibration responses on the touch surface, and radiated sound power. Proper actuator driving signals are derived from the optimization problem formulated using the relationship. The proposed method was demonstrated through vibration rendering experiments on a touch surface comprising an acrylic plate and voice coil actuators. The results showed that the proposed method could shape the acoustic radiation while rendering target vibration patterns at desired positions on the touch surface. This study's proposed method could allow haptic engineers to design vibrotactile feedback and sound radiation simultaneously for a more compelling haptic experience.
APA, Harvard, Vancouver, ISO, and other styles
23

Jing, Liqiao, Xiao Lin, Zuojia Wang, Ido Kaminer, Hao Hu, Erping Li, Yongmin Liu, Min Chen, Baile Zhang, and Hongsheng Chen. "Polarization Shaping of Free‐Electron Radiation by Gradient Bianisotropic Metasurfaces." Laser & Photonics Reviews 15, no. 4 (February 25, 2021): 2000426. http://dx.doi.org/10.1002/lpor.202000426.

Full text
APA, Harvard, Vancouver, ISO, and other styles
24

Kang Dongguo, 康洞国, 李蒙 Li Meng, and 高耀明 Gao Yaoming. "Radiation pulse shaping for laser indirect-drive central ignition target." High Power Laser and Particle Beams 25, no. 1 (2013): 57–61. http://dx.doi.org/10.3788/hplpb20132501.0057.

Full text
APA, Harvard, Vancouver, ISO, and other styles
25

Kantor, M. Yu, and A. V. Sidorov. "Shaping pulses of radiation detectors into a true Gaussian form." Journal of Instrumentation 14, no. 01 (January 3, 2019): P01004. http://dx.doi.org/10.1088/1748-0221/14/01/p01004.

Full text
APA, Harvard, Vancouver, ISO, and other styles
26

Abbiati, R., A. Geraci, and G. Ripamonti. "Analog shaping optimization for digital processing of radiation detector signals." IEEE Transactions on Nuclear Science 52, no. 5 (October 2005): 1638–42. http://dx.doi.org/10.1109/tns.2005.856761.

Full text
APA, Harvard, Vancouver, ISO, and other styles
27

Jordanov, Valentin T., Glenn F. Knoll, Alan C. Huber, and John A. Pantazis. "Digital techniques for real-time pulse shaping in radiation measurements." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 353, no. 1-3 (December 1994): 261–64. http://dx.doi.org/10.1016/0168-9002(94)91652-7.

Full text
APA, Harvard, Vancouver, ISO, and other styles
28

El-Halwagy, Waleed, Rashid Mirzavand, Jordan Melzer, Masum Hossain, and Pedram Mousavi. "Fence Shaping of Substrate Integrated Fan-Beam Electric Dipole for High-Band 5G." Electronics 8, no. 5 (May 15, 2019): 545. http://dx.doi.org/10.3390/electronics8050545.

Full text
Abstract:
This work presents fence shaping for dipole antenna operating at 5G high-band frequencies. A via fence is employed around the dipole to suppress back radiation. By varying the geometric shape of the fence, the dipole’s radiation characteristics can be controlled, which adds an additional degree of freedom to the design. This was investigated by studying different fence shapes, namely rectangular-, U-, and V-shaped fences. The wide bandwidth (higher than 6.5 GHz) centered around 28 GHz, and the stable radiation performance from 24 GHz to 32 GHz made the proposed structure capable of supporting multiple 5G frequency bands and the fence shaping help modulate the gain and HPBW of the dipole. All fabricated prototypes attained front-to-back radiation ratio (F/B) higher than 36 dB, with good gain/HPBW performances of 14.1 dBi/103.7°, 13.5dBi/118°, and 12.6 dBi/133° from the V-fence, U-fence, and rectangular fence 4 × 1 arrays, respectively.
APA, Harvard, Vancouver, ISO, and other styles
29

Minsky, D. M., A. J. Kreiner, and A. A. Valda. "AB-BNCT beam shaping assembly based on 7Li(p,n)7Be reaction optimization." Applied Radiation and Isotopes 69, no. 12 (December 2011): 1668–71. http://dx.doi.org/10.1016/j.apradiso.2011.02.047.

Full text
APA, Harvard, Vancouver, ISO, and other styles
30

Herrera, M. S., S. J. González, A. A. Burlon, D. M. Minsky, and A. J. Kreiner. "Treatment planning capability assessment of a beam shaping assembly for accelerator-based BNCT." Applied Radiation and Isotopes 69, no. 12 (December 2011): 1870–73. http://dx.doi.org/10.1016/j.apradiso.2011.03.029.

Full text
APA, Harvard, Vancouver, ISO, and other styles
31

Lee, Pei-Yi, Xiaobin Tang, Changran Geng, and Yuan-Hao Liu. "A bi-tapered and air-gapped beam shaping assembly used for AB-BNCT." Applied Radiation and Isotopes 167 (January 2021): 109392. http://dx.doi.org/10.1016/j.apradiso.2020.109392.

Full text
APA, Harvard, Vancouver, ISO, and other styles
32

Goetze, Kerstin, Juergen Bischoff, Jens Bliedtner, Oliver Faehnle, and Michael Kahl. "Removing microdefects on glass surfaces using laser radiation." EPJ Web of Conferences 266 (2022): 03009. http://dx.doi.org/10.1051/epjconf/202226603009.

Full text
Abstract:
Scratches and microdefects on glass surfaces significantly impair the optical and mechanical properties of optical components. They already occur during mechanical processing (shaping) and have to be removed in several specific processing steps. A process is presented with which scratches and microdefects can be removed by means of CO2 laser radiation.
APA, Harvard, Vancouver, ISO, and other styles
33

Araújo, Sofia J., and Isao Kuraoka. "Nucleotide excision repair genes shaping embryonic development." Open Biology 9, no. 10 (October 2019): 190166. http://dx.doi.org/10.1098/rsob.190166.

Full text
Abstract:
Nucleotide excision repair (NER) is a highly conserved mechanism to remove helix-distorting DNA lesions. A major substrate for NER is DNA damage caused by environmental genotoxins, most notably ultraviolet radiation. Xeroderma pigmentosum, Cockayne syndrome and trichothiodystrophy are three human disorders caused by inherited defects in NER. The symptoms and severity of these diseases vary dramatically, ranging from profound developmental delay to cancer predisposition and accelerated ageing. All three syndromes include developmental abnormalities, indicating an important role for optimal transcription and for NER in protecting against spontaneous DNA damage during embryonic development. Here, we review the current knowledge on genes that function in NER that also affect embryonic development, in particular the development of a fully functional nervous system.
APA, Harvard, Vancouver, ISO, and other styles
34

Li, Hui, Miao Wu, Wencong Li, and Yafang Yu. "Reducing Hand Effect on Mobile Handset Antennas by Shaping Radiation Patterns." IEEE Transactions on Antennas and Propagation 69, no. 8 (August 2021): 4279–88. http://dx.doi.org/10.1109/tap.2020.3048535.

Full text
APA, Harvard, Vancouver, ISO, and other styles
35

Wang, Bo, and Kama Huang. "SHAPING THE RADIATION PATTERN WITH MU AND EPSILON-NEAR-ZERO METAMATERIALS." Progress In Electromagnetics Research 106 (2010): 107–19. http://dx.doi.org/10.2528/pier10060103.

Full text
APA, Harvard, Vancouver, ISO, and other styles
36

Kuptsov, G. V., V. V. Petrov, A. V. Laptev, V. A. Petrov, and E. V. Pestryakov. "Simulation of picosecond pulse propagation in fibre-based radiation shaping units." Quantum Electronics 46, no. 9 (September 28, 2016): 801–5. http://dx.doi.org/10.1070/qel15993.

Full text
APA, Harvard, Vancouver, ISO, and other styles
37

Brianeze, J. R., A. Cerqueira Sodré, and H. E. Hernández-Figueroa. "Tridimensional Yagi antenna: shaping radiation pattern with a non-planar array." IET Microwaves, Antennas & Propagation 4, no. 9 (2010): 1434. http://dx.doi.org/10.1049/iet-map.2009.0480.

Full text
APA, Harvard, Vancouver, ISO, and other styles
38

Mohan, Radhe. "Field shaping for three-dimensional conformal radiation therapy and multileaf collimation." Seminars in Radiation Oncology 5, no. 2 (April 1995): 86–99. http://dx.doi.org/10.1016/s1053-4296(95)80003-4.

Full text
APA, Harvard, Vancouver, ISO, and other styles
39

Jiao, Q. Q., Z. Z. Chen, Y. L. Feng, S. Zhang, S. F. Li, S. X. Jiang, J. Z. Li, et al. "Modification of far-field radiation pattern by shaping InGaN/GaN nanorods." Applied Physics Letters 110, no. 5 (January 30, 2017): 052103. http://dx.doi.org/10.1063/1.4975203.

Full text
APA, Harvard, Vancouver, ISO, and other styles
40

Izewska, Joanna. "Shaping of photon beams from electron linear accelerators in radiation therapy." Medical Physics 20, no. 1 (January 1993): 171–77. http://dx.doi.org/10.1118/1.597133.

Full text
APA, Harvard, Vancouver, ISO, and other styles
41

Bergmann, J. R., and L. C. Palma Pereira. "Radiation pattern control by subreflector shaping in a dual-reflector antenna." Microwave and Optical Technology Letters 35, no. 5 (October 25, 2002): 408–12. http://dx.doi.org/10.1002/mop.10621.

Full text
APA, Harvard, Vancouver, ISO, and other styles
42

Kasesaz, Yaser, and Marjan Karimi. "A novel design of beam shaping assembly to use D-T neutron generator for BNCT." Applied Radiation and Isotopes 118 (December 2016): 317–25. http://dx.doi.org/10.1016/j.apradiso.2016.09.029.

Full text
APA, Harvard, Vancouver, ISO, and other styles
43

Tran, Lucy A. P. "The role of ecological opportunity in shaping disparate diversification trajectories in a bicontinental primate radiation." Proceedings of the Royal Society B: Biological Sciences 281, no. 1781 (April 22, 2014): 20131979. http://dx.doi.org/10.1098/rspb.2013.1979.

Full text
Abstract:
Exceptional species and phenotypic diversity commonly are attributed to ecological opportunity (EO). The conventional EO model predicts that rates of lineage diversification and phenotypic evolution are elevated early in a radiation only to decline later in response to niche availability. Foregut fermentation is hypothesized to be a key innovation that allowed colobine monkeys (subfamily Colobinae), the only primates with this trait, to successfully colonize folivore adaptive zones unavailable to other herbivorous species. Therefore, diversification rates also are expected to be strongly linked with the evolution of traits related to folivory in these monkeys. Using dated molecular phylogenies and a dataset of feeding morphology, I test predictions of the EO model to evaluate the role of EO conferred by foregut fermentation in shaping the African and Asian colobine radiations. Findings from diversification methods coupled with colobine biogeographic history provide compelling evidence that decreasing availability of new adaptive zones during colonization of Asia together with constraints presented by dietary specialization underlie temporal changes in diversification in the Asian but not African clade. Additionally, departures from the EO model likely reflect iterative diversification events in Asia.
APA, Harvard, Vancouver, ISO, and other styles
44

Meltaus, J., J. Salo, E. Noponen, M. M. Salomaa, V. Viikari, A. Lonnqvist, T. Koskinen, et al. "Millimeter-wave beam shaping using holograms." IEEE Transactions on Microwave Theory and Techniques 51, no. 4 (April 2003): 1274–80. http://dx.doi.org/10.1109/tmtt.2003.809679.

Full text
APA, Harvard, Vancouver, ISO, and other styles
45

Gueguen, Ronny, Benjamin Grange, Françoise Bataille, Samuel Mer, and Gilles Flamant. "Shaping High Efficiency, High Temperature Cavity Tubular Solar Central Receivers." Energies 13, no. 18 (September 14, 2020): 4803. http://dx.doi.org/10.3390/en13184803.

Full text
Abstract:
High temperature solar receivers are developed in the context of the Gen3 solar thermal power plants, in order to power high efficiency heat-to-electricity cycles. Since particle technology collects and stores high temperature solar heat, CNRS (French National Center for Scientific Research) develops an original technology using fluidized particles as HTF (heat transfer fluid). The targeted particle temperature is around 750 °C, and the walls of the receiver tubes, reach high working temperatures, which impose the design of a cavity receiver to limit the radiative losses. Therefore, the objective of this work is to explore the cavity shape effect on the absorber performances. Geometrical parameters are defined to parametrize the design. The size and shape of the cavity, the aperture-to-absorber distance and its tilt angle. A thermal model of a 50 MW hemi-cylindrical tubular receiver, closed by refractory panels, is developed, which accounts for radiation and convection losses. Parameter ranges that reach a thermal efficiency of at least 85% are explored. This sensitivity analysis allows the definition of cavity shape and dimensions to reach the targeted efficiency. For an aperture-to-absorber distance of 9 m, the 85% efficiency is obtained for aperture areas equal or less than 20 m2 and 25 m2 for high, and low convection losses, respectively.
APA, Harvard, Vancouver, ISO, and other styles
46

Beckmann, Dennis, Daniel Schnitzler, Dagmar Schaefer, Jens Gottmann, and Ingomar Kelbassa. "Beam shaping of laser diode radiation by waveguides with arbitrary cladding geometry written with fs-laser radiation." Optics Express 19, no. 25 (November 28, 2011): 25418. http://dx.doi.org/10.1364/oe.19.025418.

Full text
APA, Harvard, Vancouver, ISO, and other styles
47

Owocki, Stanley P. "Instabilities in massive stars." Symposium - International Astronomical Union 212 (2003): 281–90. http://dx.doi.org/10.1017/s0074180900212345.

Full text
Abstract:
A defining property of massive stars is the dominant, dynamical role played by radiation throughout the stellar interior, atmosphere, and wind. Associated with this radiation hydrodynamics are several distinct kinds of instabilities that can lead to convection in both core and envelope, clumping in atmosphere and wind outflow, and perhaps even the dramatic mass loss outbursts associated with Luminous Blue Variable phases. Here I review these instabilities with emphasis on basic physical properties of radiative driving. I draw on two specific examples of dynamical instability, namely the strong instability associated with line-driving of a stellar wind outflow, and the global stellar instabilities associated with approaching or exceeding a modified Eddington limit. I conclude with a brief mention of recent ideas on the role of stellar rotation in the shaping of bipolar LBV outbursts.
APA, Harvard, Vancouver, ISO, and other styles
48

Venanzi, Marta, Sebastian Hönig, and David Williamson. "The Role of Infrared Radiation Pressure in Shaping Dusty Winds in AGNs." Astrophysical Journal 900, no. 2 (September 14, 2020): 174. http://dx.doi.org/10.3847/1538-4357/aba89f.

Full text
APA, Harvard, Vancouver, ISO, and other styles
49

Skinner, Lawrie, Benjamin P. Fahimian, and Amy S. Yu. "Tungsten filled 3D printed field shaping devices for electron beam radiation therapy." PLOS ONE 14, no. 6 (June 19, 2019): e0217757. http://dx.doi.org/10.1371/journal.pone.0217757.

Full text
APA, Harvard, Vancouver, ISO, and other styles
50

Carletti, Luca, Andrea Locatelli, Dragomir Neshev, and Costantino De Angelis. "Shaping the Radiation Pattern of Second-Harmonic Generation from AlGaAs Dielectric Nanoantennas." ACS Photonics 3, no. 8 (May 3, 2016): 1500–1507. http://dx.doi.org/10.1021/acsphotonics.6b00050.

Full text
APA, Harvard, Vancouver, ISO, and other styles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography