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Journal articles on the topic 'Harmonic generation; Ionisation suppression'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

REED, VALERIE C. "SUPERINTENSE FIELD IONISATION SUPPRESSION IN THE HIGH FREQUENCY REGIME." Modern Physics Letters B 06, no. 12 (1992): 683–701. http://dx.doi.org/10.1142/s0217984992000776.

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We present a brief review of the subject of ionisation suppression, or atomic stabilisation, in intense laser fields. As a preliminary, we outline the general non-linear response of an atom to a strong laser field, describing multiphoton ionisation and harmonic generation. We then discuss methods of suppressing the ionisation rate from an atom, considering two broad regimes: strong field ionisation (I < 1016 W/cm 2), in which the suppression mechanism in generally interpreted in terms of quantum interference; and superintense field ionisation (I > 1016 W/cm 2), in which the Kramers-Henne

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2

Proctor, M. J., J. A. D. Stockdale, T. Efthimiopoulos, and C. Fotakis. "Third-harmonic generation and ionisation processes in Kr." Chemical Physics Letters 137, no. 3 (1987): 223–25. http://dx.doi.org/10.1016/0009-2614(87)80208-7.

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3

Moreno, Pablo, Luis Plaja, Victor Malyshev, and Luis Roso. "Influence of barrier suppression in high-order harmonic generation." Physical Review A 51, no. 6 (1995): 4746–53. http://dx.doi.org/10.1103/physreva.51.4746.

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4

Jeys, Thomas H. "Suppression of laser spiking by intracavity second harmonic generation." Applied Optics 30, no. 9 (1991): 1011. http://dx.doi.org/10.1364/ao.30.001011.

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5

Ashfold, M. N. R., C. D. Heryet, J. D. Prince, and B. Tutcher. "Competition between resonance-enhanced multiphoton ionisation and third-harmonic generation in acetylene vapour." Chemical Physics Letters 131, no. 4-5 (1986): 291–97. http://dx.doi.org/10.1016/0009-2614(86)87153-6.

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6

Mitra, S., S. Biswas, J. Schötz, et al. "Suppression of individual peaks in two-colour high harmonic generation." Journal of Physics B: Atomic, Molecular and Optical Physics 53, no. 13 (2020): 134004. http://dx.doi.org/10.1088/1361-6455/ab859c.

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7

Martin, K. I., W. A. Clarkson, and D. C. Hanna. "Self-suppression of axial mode hopping by intracavity second-harmonic generation." Optics Letters 22, no. 6 (1997): 375. http://dx.doi.org/10.1364/ol.22.000375.

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8

French, P. M. W., and D. S. McCallum. "Suppression of low-intensity features using second-harmonic generation and amplification." Optics Letters 14, no. 19 (1989): 1077. http://dx.doi.org/10.1364/ol.14.001077.

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9

Li, Xin Jun. "Analysis and Suppression Strategy of Harmonics for SPWM Inverter." Advanced Materials Research 588-589 (November 2012): 454–57. http://dx.doi.org/10.4028/www.scientific.net/amr.588-589.454.

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The three-phase voltage type SPWM inverter output voltage and current harmonic and its generation rule is discussed. And put forward a new easy to implement harmonic suppression strategy, the method through the correct choice of the carrier frequency and the sinusoidal wave superimposed on a three wave makes saddle shaped wave, to produce a corresponding SPWM waveform control inverter switch on-off thus improving the output waveform. Mathematical analysis shows that is helpful to reduce the output voltage THD ( waveform distortion factor ), improved harmonic current loss and torque characteris

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10

Zhang, Qi, Kun Zhao, Jie Li, et al. "Suppression of driving laser in high harmonic generation with a microchannel plate." Optics Letters 39, no. 12 (2014): 3670. http://dx.doi.org/10.1364/ol.39.003670.

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11

Lei, X. L. "Current suppression and harmonic generation by intense terahertz fields in semiconductor superlattices." Journal of Applied Physics 82, no. 2 (1997): 718–21. http://dx.doi.org/10.1063/1.365604.

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12

Tsubakimoto, K., T. Jitsuno, N. Miyanaga, M. Nakatsuda, T. Kanabe, and S. Nakai. "Suppression of speckle contrast by using polarization property on second harmonic generation." Optics Communications 103, no. 3-4 (1993): 185–88. http://dx.doi.org/10.1016/0030-4018(93)90441-7.

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13

Lockyer, Nicholas P., and John C. Vickerman. "Single Photon Ionisation Mass Spectrometry Using Laser-Generated Vacuum Ultraviolet Photons." Laser Chemistry 17, no. 3 (1997): 139–59. http://dx.doi.org/10.1155/1997/53174.

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This paper provides an overview of the method of single photon ionisation mass spectrometry. A review of the theory of frequency upconversion using third-order 4- wave sum mixing in isotropic media and experimental results of third harmonic generation (THG) using a frequency tripled 355 nm Nd:YAG pump source are presented. Vacuum Ultra-violet (VUV) photons of wavelength 118 nm are detected in an acetone ionisation chamber. The emphasis of this paper is on the practical aspects of generating and detecting the VUV photons and using them for single photon ionisation (SPI) in the ion source of a m

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14

Yang, Yisheng, Yan Wang, Chenggang Tao, Junqing Ma, and Jichun Tan. "Suppression of FM-to-AM conversion in phase modulated third-harmonic generation process." Optik 125, no. 15 (2014): 4001–4. http://dx.doi.org/10.1016/j.ijleo.2014.01.143.

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15

Guo, Jia, Zhi Gang Li, Ya Ping Cheng, Kai Huang, and Chun Yan Cui. "A Method of Harmonic Current Suppression in Photovoltaic Grid-Connected Systems." Applied Mechanics and Materials 303-306 (February 2013): 1145–48. http://dx.doi.org/10.4028/www.scientific.net/amm.303-306.1145.

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The grid-connected inverter plays an important role in the photovoltaic power generation systems, the output of the grid current harmonics affect the stability of the grid. The reason of grid inverter output current distortion, a detailed analysis of current waveform control strategy and its effectiveness of the grid-connected inverter harmonic current suppression is introduced based on the d-q coordinates in this paper.

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16

CECCHERINI, P., A. BOSCOLO, L. POLETTO, et al. "Gas medium ionization and harmonic wavelength tunability in high-order harmonic generation with ultrashort laser pulses." Laser and Particle Beams 18, no. 3 (2000): 477–82. http://dx.doi.org/10.1017/s026303460018317x.

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We have investigated the effect of free electrons on the spectral properties of high-order harmonics generated in a neon gas jet by a 30 fs Titanium:Sapphire pumping laser with intensities in the range 5–10 × 1014 W/cm2. The main feature of our observations concerns the possibility of continuously tuning the harmonic wavelength in the spectral region 20–7 nm, by taking advantage of the blue shift of harmonic wavelengths induced by the presence of free electrons to cover the entire spectral region between two consecutive harmonics of the unshifted spectrum. Different amounts of blue shift, whic

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17

Silin, Viktor P., and Pavel V. Silin. "Polarisation dependences of harmonic generation in the plasma produced in the ionisation of excited-state hydrogen-like atoms." Quantum Electronics 35, no. 2 (2005): 157–62. http://dx.doi.org/10.1070/qe2005v035n02abeh002757.

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18

Szaszkó-Bogár, Viktor, Péter Földi, István Magashegyi, and Katalin Varjú. "Interference-Induced Phenomena in High-Order Harmonic Generation from Bulk Solids." Applied Sciences 9, no. 8 (2019): 1572. http://dx.doi.org/10.3390/app9081572.

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We consider a quantum mechanical model for the high-order harmonic generation in bulk solids. The bandgap is assumed to be considerably larger than the exciting photon energy. Using dipole approximation, the dynamical equations for different initial Bloch states are decoupled in the velocity gauge. Although there is no quantum mechanical interference between the time evolution of different initial states, the complete harmonic radiation results from the interference of fields emitted by all the initial (valence band) states. In particular, the suppression of the even-order harmonics can also b

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19

Yi, Jue-Min, Vladimir Smirnov, Xianji Piao, et al. "Suppression of Radiative Damping and Enhancement of Second Harmonic Generation in Bull’s Eye Nanoresonators." ACS Nano 10, no. 1 (2015): 475–83. http://dx.doi.org/10.1021/acsnano.5b05384.

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20

Chen, Ying, Lie-Jia Qian, He-Yuan Zhu, and Dian-Yuan Fan. "Suppression of FM-to-AM Conversion in Broadband Third-Harmonic Generation of Nd:Glass Laser." Chinese Physics Letters 28, no. 4 (2011): 044209. http://dx.doi.org/10.1088/0256-307x/28/4/044209.

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21

Liang, Zhi Rui, and Meng Ya Zhao. "The Analysis and Suppression of Harmonics on the AC Side of HVDC Transmission System." Applied Mechanics and Materials 556-562 (May 2014): 1822–25. http://dx.doi.org/10.4028/www.scientific.net/amm.556-562.1822.

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The advantage of HVDC is large power of transmission, low cost and good control performance. Generation system has harmonic because of the nonlinear characteristics of the converter. It has very important significance for HVDC transmission system to accurate analysis and rational allocation of harmonic filtering device. This paper mainly studies the characteristics and suppression of harmonics on AC side in HVDC system, and the filtering effect of different filter combinations of simulation.

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22

Liu, Hang, and Liqiang Feng. "Electron-Nuclear Dynamics on Amplitude and Frequency Modulation of Molecular High-Order Harmonic Generation from H2+ and its Isotopes." Zeitschrift für Naturforschung A 72, no. 10 (2017): 941–53. http://dx.doi.org/10.1515/zna-2017-0237.

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AbstractElectron-nuclear dynamics of molecular high-order harmonic generation from H2+ and its isotopes has been theoretically investigated beyond the Born-Oppenheimer approximations. The results show that (i) due to the different ionisation probabilities and the harmonic emission times, the intensities of the harmonics from H2+ and its isotopes are very sensitive to the initial vibrational state, the pulse duration, and the pulse intensity. (ii) Due to the nonadiabatic effects in molecular high-order harmonic generation, the red-shifts of the harmonics can be found in the lower pulse intensit

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23

Zhang, Tiejun, Hiroyuki Daido, and Yoshiaki Kato. "Subpulse Suppression of Chirped-Pulse Amplification Nd:Glass Laser Pulse with Time-Predelay Second-Harmonic Generation." Japanese Journal of Applied Physics 34, Part 1, No. 9A (1995): 4815–16. http://dx.doi.org/10.1143/jjap.34.4815.

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24

Minina, A. A., M. V. Frolov, A. N. Zheltukhin, and N. V. Vvedenskii. "Tunnelling approximation for estimating the amplitude of high harmonic generation in intense laser fields: analysis of ionisation and recombination times." Quantum Electronics 47, no. 3 (2017): 216–21. http://dx.doi.org/10.1070/qel16315.

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25

Kakehata, M., H. Takada, K. Miyazaki, H. Kono, I. Kawata, and Y. Fujimura. "Effects of laser pulsewidth on higher-order harmonic generation in the barrier-suppression-ionization intensity regime." Applied Physics B: Lasers and Optics 70, no. 2 (2000): 219–24. http://dx.doi.org/10.1007/s003400050035.

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26

Evangelou, Sofia. "Altering Degenerate Four-Wave Mixing and Third-Harmonic Generation in a Coupled Quantum Dot–Metallic Nanoparticle Structure with the Use of the Purcell Effect." Materials Proceedings 4, no. 1 (2020): 39. http://dx.doi.org/10.3390/iocn2020-07875.

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The modification of the optical properties of semiconductor quantum dots near plasmonic nanostructures has attracted significant attention in recent years due to the several potential applications of the coupled nanostructures in optoelectronics, biophotonics and quantum technologies, including sensors, light harvesting, quantum information processing and quantum communication, imaging, photocatalysis, solar cells and others. One of the methods for modifying the nonlinear optical susceptibilities in quantum dots near plasmonic nanostructures uses the change of the spontaneous decay rates of qu

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27

Zou, Yun, Yinlong Hu, and Sifan Cao. "Model Predictive Control of Electric Spring for Voltage Regulation and Harmonics Suppression." Mathematical Problems in Engineering 2019 (April 7, 2019): 1–8. http://dx.doi.org/10.1155/2019/7973591.

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This paper presents a model predictive control (MPC) strategy for electric spring (ES) to address the power quality problems, especially voltage regulation and harmonic suppression, which are more acute for a growing proportion of renewable energy generation to the grid. A Kalman filter is used to estimate the random variation of the supply voltage and extract the fundamental and harmonic components of the supply voltage, respectively. In this way, the supply voltage, which is treated as an external disturbance for the plant, can be established in the state-space model form. Such processing br

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28

Polikarpov, Maxim, Irina Snigireva, and Anatoly Snigirev. "X-ray harmonics rejection on third-generation synchrotron sources using compound refractive lenses." Journal of Synchrotron Radiation 21, no. 3 (2014): 484–87. http://dx.doi.org/10.1107/s1600577514001003.

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A new method of harmonics rejection based on X-ray refractive optics has been proposed. Taking into account the fact that the focal distance of the refractive lens is energy-dependent, the use of an off-axis illumination of the lens immediately leads to spatial separation of the energy spectrum by focusing the fundamental harmonic at the focal point and suppressing the unfocused high-energy radiation with a screen absorber or slit. The experiment was performed at the ESRF ID06 beamline in the in-line geometry using an X-ray transfocator with compound refractive lenses. Using this technique the

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29

Yoshida, Hidehito, and Keiji Wada. "Harmonic Current Suppression in Three-Phase Grids Under an Unbalanced Installation of Single-Phase Distributed Generation Units." IEEJ Transactions on Industry Applications 136, no. 3 (2016): 204–11. http://dx.doi.org/10.1541/ieejias.136.204.

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30

Takeshita, Takaharu, Wataru Sugiyama, Takahiro Masuda, Nobuyuki Matsui, and Hideki Fujita. "Current Waveform Control of Distributed Generation System for Suppression of Harmonic Voltage and Current on Distribution System." IEEJ Transactions on Industry Applications 123, no. 7 (2003): 824–31. http://dx.doi.org/10.1541/ieejias.123.824.

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31

Yang, Yisheng, Bin Feng, Wei Han, Wanguo Zheng, Fuquan Li, and Jichun Tan. "Suppression of FM-to-AM conversion in third-harmonic generation at the retracing point of a crystal." Optics Letters 34, no. 24 (2009): 3848. http://dx.doi.org/10.1364/ol.34.003848.

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32

Harimoto, Tetsuo, Makoto Aoyama, Koichi Yamakawa, and Motoki Yonemura. "Suppression of Cubic Nonlinearity in Second-Harmonic Generation of Ultrahigh-Intensity Laser Pulses by Initial Frequency Chirp." Japanese Journal of Applied Physics 41, Part 1, No. 1 (2002): 139–44. http://dx.doi.org/10.1143/jjap.41.139.

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33

Ye, Tao, NingYi Dai, Keng Weng Lao, Chi-Seng Lam, and Man-Chung Wong. "Low DC voltage PV generation system with power factor correction and harmonic suppression capability in a distribution network." IET Generation, Transmission & Distribution 13, no. 7 (2019): 1049–56. http://dx.doi.org/10.1049/iet-gtd.2018.5144.

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34

Siders, C. W., N. C. Turner, M. C. Downer, A. Babine, A. Stepanov, and A. M. Sergeev. "Blue-shifted third-harmonic generation and correlated self-guiding during ultrafast barrier suppression ionization of subatmospheric density noble gases." Journal of the Optical Society of America B 13, no. 2 (1996): 330. http://dx.doi.org/10.1364/josab.13.000330.

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35

Feng, Jinxia, Yongmin Li, Xiutao Tian, Jianli Liu та Kuanshou Zhang. "Noise suppression, linewidth narrowing of a master oscillator power amplifier at 1.56μm and the second harmonic generation output at 780nm". Optics Express 16, № 16 (2008): 11871. http://dx.doi.org/10.1364/oe.16.011871.

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36

Ashwell, Geoffrey J., Antony N. Dyer, Andrew Green, Naoki Sato, and Taro Sakuma. "Monolayer films of U-shaped molecules: suppression of the aggregation-induced second-harmonic generation of squaraine dyes by guest–host interactions." Journal of Materials Chemistry 10, no. 11 (2000): 2473–76. http://dx.doi.org/10.1039/b003602l.

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37

Ahmed Al-Shareefi, Nael, Jaafar A. Aldhaibaini, Sura Adil Abbas, and Hadeel S. Obaid. "Towards 5G millimeter-wave wireless networks: a comparative study on electro-optical upconversion techniques." Indonesian Journal of Electrical Engineering and Computer Science 20, no. 3 (2020): 1471. http://dx.doi.org/10.11591/ijeecs.v20.i3.pp1471-1478.

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<span>Fifth−generation (5G) wireless networks that use the MM−W hold a great promise to revolutionize wireless industry. However, the difficulty in generating and transmitting these high‐frequency signals in the electrical−domain due to bandwidth limitation of electronic components, and high absorption loss limits current applications. Consequently, optical generation and transmission of MM−W signals are a viable option. In this paper, a comparative study is carried out on three electro−optical upconversion (EOU) techniques to generate 60−GHz MM−W signal, namely 4−tupling, 6−tupling and

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38

Rao, Zhimeng, Zhigang Zhang, Shoudao Huang, Zhuo Long, and Gongping Wu. "Characteristics and Current Harmonic Control of N* Three-Phase PMSG for HVDC Transmission Based on MMC." Energies 13, no. 1 (2020): 178. http://dx.doi.org/10.3390/en13010178.

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The permanent magnet synchronous generator (PMSG) is widely used in high voltage DC transmission technology of wind power systems due to its high-power density, high reliability and simple maintenance. To meet the increasing rated power of the generator (≥10 MW), the multi-converter parallel connection is usually used, which significantly increases the complexity and cost of the system. Therefore, a new modular N* three-phase PMSG is proposed in this paper. Based on the structure and working principle of the generator, the finite element model is established, and the electromagnetic properties

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39

CHIRILĂ, C. C., C. J. JOACHAIN, N. J. KYLSTRA, and R. M. POTVLIEGE. "Interaction of ultra-intense laser pulses with relativistic ions." Laser and Particle Beams 22, no. 3 (2004): 203–6. http://dx.doi.org/10.1017/s0263034604223023.

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At high laser intensities, three step recollision processes such as high order harmonic generation and high-order ATI, are normally severely suppressed due to the magnetic field component of the laser pulse. However, if the laser pulse and relativistic ion beam are directed against each other, a significant increase in the frequency and the intensity of the pulse in the rest frame of the ions can occur. By performing calculations based on a Coulomb-corrected nondipole strong field approximation, we have shown that there is a range of intensities, Lorentz factors, and ion charges for which the

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40

Modini, Sara, Giorgio Graziani, Giovanni Bernardini, and Massimo Gennaretti. "Pressure feedback-based blade–vortex interaction noise controller for helicopter rotors." International Journal of Aeroacoustics 17, no. 3 (2018): 295–318. http://dx.doi.org/10.1177/1475472x18774052.

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With the aim of alleviating the noise annoyance emitted by blade–vortex interactions occurring on helicopter main rotors, the present work presents a methodology suitable for the identification of a multi-cyclic harmonic controller based on the actuation of rotor blades equipped with Miniature Trailing Edge Effectors. The objective of the control methodology is the direct suppression of the aerodynamic noise sources by generation of localized high-harmonic blade–vortex interaction counter-actions. The set-up of control devices is selected on the basis of the blade–vortex interaction scenario,

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41

Al-Yasir, Yasir I. A., Naser Ojaroudi Parchin, Ahmed M. Abdulkhaleq, Mustafa S. Bakr, and Raed A. Abd-Alhameed. "A Survey of Differential-Fed Microstrip Bandpass Filters: Recent Techniques and Challenges." Sensors 20, no. 8 (2020): 2356. http://dx.doi.org/10.3390/s20082356.

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Differentially driven devices represent a highly promising research field for radio frequency (RF), microwave (MW), and millimeter-wave (mmWave) designers and engineers. Designs employing differential signals are essential elements in low-noise fourth-generation (4G) and fifth-generation (5G) communications. Apart from the conventional planar MW components, differential–fed balanced microstrip filters, as promising alternatives, have several advantages, including high common-mode rejection, low unwanted radiation levels, high noise immunity, and wideband harmonic suppression. In this paper, a

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42

Lysak, T. M., and V. A. Trofimov. "Achieving high-efficiency second harmonic generation in a sequence of laser pulses with random peak intensity. Part II. Suppression of intensity fluctuations in a quadratic-nonlinearity medium." Computational Mathematics and Modeling 20, no. 1 (2009): 1–25. http://dx.doi.org/10.1007/s10598-009-9015-4.

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43

Adkins, Amy N., Julius P. A. Dewald, Lindsay P. Garmirian, Christa M. Nelson, and Wendy M. Murray. "Serial sarcomere number is substantially decreased within the paretic biceps brachii in individuals with chronic hemiparetic stroke." Proceedings of the National Academy of Sciences 118, no. 26 (2021): e2008597118. http://dx.doi.org/10.1073/pnas.2008597118.

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A muscle’s structure, or architecture, is indicative of its function and is plastic; changes in input to or use of the muscle alter its architecture. Stroke-induced neural deficits substantially alter both input to and usage of individual muscles. We combined in vivo imaging methods (second-harmonic generation microendoscopy, extended field-of-view ultrasound, and fat-suppression MRI) to quantify functionally meaningful architecture parameters in the biceps brachii of both limbs of individuals with chronic hemiparetic stroke and in age-matched, unimpaired controls. Specifically, serial sarcome

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44

Madasamy, P., Rajesh Verma, C. Bharatiraja, et al. "Hybrid Multicarrier Random Space Vector PWM for the Mitigation of Acoustic Noise." Electronics 10, no. 12 (2021): 1483. http://dx.doi.org/10.3390/electronics10121483.

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The pulse width modulation (PWM) inverter is an obvious choice for any industrial and power sector application. Particularly, industrial drives benefit from the higher DC-link utilization, acoustic noise, and vibration industrial standards. Many PWM techniques have been proposed to meet the drives’ demand for higher DC-link utilization and lower harmonics suppression and noise reductions. Still, random PWM (RPWM) is the best candidate for reducing the acoustic noises. Few RPWM (RPWM) methods have been developed and investigated for the AC drive’s PWM inverter. However, due to the lower randomn

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45

Chomet, H., and C. Figueira de Morisson Faria. "Attoscience in phase space." European Physical Journal D 75, no. 7 (2021). http://dx.doi.org/10.1140/epjd/s10053-021-00199-0.

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Abstract We provide a brief review of how phase space techniques are explored within strong-field and attosecond science. This includes a broad overview of the existing landscape, with focus on strong-field ionisation and rescattering, high-order harmonic generation, stabilisation and free-electron lasers. Furthermore, using our work on the subject, which deals with ionisation dynamics in atoms and diatomic molecules as well as high-order harmonic generation in inhomogeneous fields, we exemplify how such tools can be employed. One may for instance determine qualitatively different phase space

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46

Zhu, Lifeng, Shuxi Xu, Zijia Ding, Lijun Qin, and Feng Jiao. "Strategy of Harmonic Suppression of Smart DistributionNetwork with Grid-Connected Photovoltaic Generation." International Journal of Computer and Electrical Engineering, 2013, 301–4. http://dx.doi.org/10.7763/ijcee.2013.v5.718.

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47

Sarikhani, S., and S. Batebi. "High-order harmonic generation in H2+ via multicolor beam superposition: barrier suppression ionization regime." Applied Physics B 124, no. 9 (2018). http://dx.doi.org/10.1007/s00340-018-7046-2.

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48

Li, Guihua, Jinping Yao, Haisu Zhang, et al. "Influence of ionization suppression on high-harmonic generation in molecules: Dependence of cutoff energy on driver wavelength." Physical Review A 88, no. 4 (2013). http://dx.doi.org/10.1103/physreva.88.043401.

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49

Armstrong, Gregory S. J., Margarita A. Khokhlova, Marie Labeye, Andrew S. Maxwell, Emilio Pisanty, and Marco Ruberti. "Dialogue on analytical and ab initio methods in attoscience." European Physical Journal D 75, no. 7 (2021). http://dx.doi.org/10.1140/epjd/s10053-021-00207-3.

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AbstractThe perceived dichotomy between analytical and ab initio approaches to theory in attosecond science is often seen as a source of tension and misconceptions. This Topical Review compiles the discussions held during a round-table panel at the ‘Quantum Battles in Attoscience’ cecam virtual workshop, to explore the sources of tension and attempt to dispel them. We survey the main theoretical tools of attoscience—covering both analytical and numerical methods—and we examine common misconceptions, including the relationship between ab initio approaches and the broader numerical methods, as w

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50

"Reversible suppression of second harmonic generation in dye-doped liquid crystal by light-induced thermal phase transition on sub-micrometer scale." Journal of Applied Physics 117, no. 8 (2015): 083103. http://dx.doi.org/10.1063/1.4913270.

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