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Journal articles on the topic 'Spectrum width'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Spoden, Patrick J., Ray A. Wolf, and Leslie R. Lemon. "Operational Uses of Spectrum Width." E-Journal of Severe Storms Meteorology 7, no. 2 (2021): 1–28. http://dx.doi.org/10.55599/ejssm.v7i2.38.

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Spectrum width is a WSR-88D product that has been available to operational forecasters since the radar was deployed. In 2008, super-high-resolution reflectivity, velocity and spectrum width data became available. Six cases exemplifying operational use of spectrum width are presented; five are from after the upgrade. The cases were selected to depict the wide array of uses of spectrum width (SW). In one case, use of SW improved forecaster capability to evaluate the strength of horizontal shear within a bow echo’s mesovortex. One case shows that SW can be extremely helpful in determining locatio

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2

Warde, David A., and Sebastian M. Torres. "Spectrum Width Estimation Using Matched Autocorrelations." IEEE Geoscience and Remote Sensing Letters 14, no. 10 (2017): 1661–64. http://dx.doi.org/10.1109/lgrs.2017.2726898.

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3

Tursunov, I. G., and M. A. Rakhmanov. "INVESTIGATION OF THE WIDTH OF THE FORBIDDEN ZONEHEAVILY DOPED SEMICONDUCTORS." American Journal of Interdisciplinary Innovations and Research 6, no. 11 (2024): 10–14. http://dx.doi.org/10.37547/tajiir/volume06issue11-03.

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The work examines changeswidth of the forbidden zoneheavily doped semiconductors. The introduction of impurities into the crystal lattice at low concentrations does not change the width forbidden zones semiconductor and does not affect the energy spectrum of electrons. Only discrete levels appear in the forbidden zone. When the concentration of impurities becomes large enough, the energy spectrum and the width of the BG of the crystal change.

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Fang, Ming, Richard J. Doviak, and Bruce A. Albrecht. "Significance of the Coupled Term in the Doppler Weather Radar Spectrum Width Equation." Journal of Atmospheric and Oceanic Technology 28, no. 4 (2011): 539–47. http://dx.doi.org/10.1175/2011jtecha1442.1.

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Abstract There is an additional zero mean random variable term that couples mean wind shear and turbulence in the Doppler radar spectrum width equation. This random variable, labeled the “coupled term,” has been neglected heretofore in the literature. Herein, the variance of the squared spectrum width ascribed to this coupled term is determined from data collected with a Weather Surveillance Radar-1988 Doppler (WSR-88D) in two snowstorms; it can exceed 1 m4 s−4. Thus, this coupled term can be a significant contributor to the variance of the spectrum width and must be considered when using spec

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5

ABDULLAH, S. A., and R. S. FYATH. "Spectrum of pulse interval and width modulation." International Journal of Electronics 61, no. 1 (1986): 61–64. http://dx.doi.org/10.1080/00207218608920845.

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6

Hiraiwa, A., and A. Nishida. "Discrete power spectrum of line width roughness." Journal of Applied Physics 106, no. 7 (2009): 074905. http://dx.doi.org/10.1063/1.3226883.

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7

Melnikov, Valery M., and Dusan S. Zrnić. "Estimates of Large Spectrum Width from Autocovariances." Journal of Atmospheric and Oceanic Technology 21, no. 6 (2004): 969–74. http://dx.doi.org/10.1175/1520-0426(2004)021<0969:eolswf>2.0.co;2.

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8

Karaca, Timuçin, and Mario Auer. "Digital pulse-width modulator with spread-spectrum emission reduction." e & i Elektrotechnik und Informationstechnik 135, no. 1 (2018): 48–53. http://dx.doi.org/10.1007/s00502-017-0577-0.

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9

Roy, P. C., and J. C. Bhakta. "Effect of finite spectral width on the modulational instability of Alfvén waves." Journal of Plasma Physics 47, no. 3 (1992): 521–31. http://dx.doi.org/10.1017/s0022377800024399.

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The effect of finite spectral width on the modulational instability of Alfvén waves described by the derivative nonlinear Schrodinger equation is investigated using a method developed by Alber to derive a transport equation for the spectral density. The dispersion relation for a monochromatic wave is regained for a delta spectrum. It is shown that the growth rate and domain of modulational instability diminish as the spectral width increases for both the Gaussian and uniform spectrums.

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10

Zhang, Ting-ting, and Chen Qian. "Quantitative study on particle shaping of recycled aggregate by multifractal spectrum." Materials Express 13, no. 6 (2023): 1047–57. http://dx.doi.org/10.1166/mex.2023.2373.

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In this study, the feasibility of quantifying the shaping effect of aggregate particles through multifractal spectrum analysis was explored, and the relationships between the amount, particle size, and shape of aggregates and the multifractal spectrum eigenvalues of aggregate images were experimentally investigated. Finally, the multifractal spectrum before and after the shaping of real aggregate particles was compared, and the following conclusions were obtained: the aggregate distribution image satisfies the multifractal characteristics; the greater the number of aggregates in the image, the

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11

Korotkevich, A. O., and V. E. Zakharov. "Evaluation of a spectral line width for the Phillips spectrum by means of numerical simulation." Nonlinear Processes in Geophysics 22, no. 3 (2015): 325–35. http://dx.doi.org/10.5194/npg-22-325-2015.

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Abstract. The work aims to check one of the assumptions under which the kinetic equation for water waves was derived in order to understand whether it can be applied to the situations described by the Phillips spectrum. We evaluate a spectral line width of the spectrum from the simulations in the framework of primordial dynamical equations at different levels of nonlinearity in the system, corresponding to the weakly turbulent Kolmogorov–Zakharov spectra ω−4, Phillips spectra ω−5, and intermediate cases. The original motivation of the work was to check one of the assumptions under which the ki

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12

Zhichao Bu, Zhichao Bu, Siying Chen Siying Chen, Yinchao Zhang Yinchao Zhang, He Chen He Chen, Xianying Ge Xianying Ge, and Pan Guo Pan Guo. "Effect of laser pulse shape and duration on spectrum width of coherent LIDAR." Chinese Optics Letters 12, s1 (2014): S12801–312804. http://dx.doi.org/10.3788/col201412.s12801.

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13

Zechmeister, M., A. Reiners, P. J. Amado, et al. "Spectrum radial velocity analyser (SERVAL)." Astronomy & Astrophysics 609 (December 22, 2017): A12. http://dx.doi.org/10.1051/0004-6361/201731483.

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Context. The CARMENES survey is a high-precision radial velocity (RV) programme that aims to detect Earth-like planets orbiting low-mass stars. Aims. We develop least-squares fitting algorithms to derive the RVs and additional spectral diagnostics implemented in the SpEctrum Radial Velocity AnaLyser (SERVAL), a publicly available python code. Methods. We measured the RVs using high signal-to-noise templates created by coadding all available spectra of each star. We define the chromatic index as the RV gradient as a function of wavelength with the RVs measured in the echelle orders. Additionall

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14

PAN, XUEZAI, XUDONG SHANG, MINGGANG WANG, and ZUO-FEI. "THE CANTOR SET’S MULTI-FRACTAL SPECTRUM FORMED BY DIFFERENT PROBABILITY FACTORS IN MATHEMATICAL EXPERIMENT." Fractals 25, no. 01 (2017): 1750002. http://dx.doi.org/10.1142/s0218348x17500025.

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With the purpose of researching the changing regularities of the Cantor set’s multi-fractal spectrums and generalized fractal dimensions under different probability factors, from statistical physics, the Cantor set is given a mass distribution, when the mass is given with different probability ratios, the different multi-fractal spectrums and the generalized fractal dimensions will be acquired by computer calculation. The following conclusions can be acquired. On one hand, the maximal width of the multi-fractal spectrum and the maximal vertical height of the generalized fractal dimension will

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Рябухо, В. П., Л. А. Максимова, Н. Ю. Мысина, Д. В. Лякин та П. В. Рябухо. "Мгновенные спекл-структуры в частично когерентном оптическом волновом поле с широкими частотным и угловым спектрами". Журнал технической физики 126, № 2 (2019): 186. http://dx.doi.org/10.21883/os.2019.02.47202.226-18.

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AbstractWe consider the hypothesis of instantaneous volume speckle structures in a partially coherent optical wave field of frequency-broadband radiation from an extended light source. We discuss the spatiotemporal correlation properties of instantaneous speckle structures and the relation of these properties with the spatiotemporal coherent properties of the wave field. We show that the instantaneous speckle structures determine spatial fluctuations of the wave field and its spatial coherent properties. Using numerical calculations of the field of wave perturbations in the near-field diffract

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16

Ren, Sun, Zhang, and Zhao. "The Effect of Light Source Line Width on the Spectrum Resolution of Dual-Frequency Coherent Detection Signals." Sensors 19, no. 23 (2019): 5264. http://dx.doi.org/10.3390/s19235264.

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In this paper, the power spectrum resolution problem of dual-frequency coherent mixing signals is analyzed when the Doppler frequency difference is small. The power spectrum function formula of the four optical coherent mixing signals is obtained using statistical theory and the Wiener–Khinchin theorem. The influence of delay time and light source line width on the power spectrum of dual-frequency coherent signals is analyzed using this formula. The results show that delay time only affects the peak of the power spectrum of the coherent signal. An increase in the line width of the light source

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17

Song, Zukui, and Dilip V. Sarwate. "The frequency spectrum of pulse width modulated signals." Signal Processing 83, no. 10 (2003): 2227–58. http://dx.doi.org/10.1016/s0165-1684(03)00164-6.

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18

Smith, J., A. Brown, M. DeMerchant, and X. Bao. "Pulse width dependance of the Brillouin loss spectrum." Optics Communications 168, no. 5-6 (1999): 393–98. http://dx.doi.org/10.1016/s0030-4018(99)00366-1.

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19

Sundukov, A. E. "Argumentation of filter width selection with the use of envelope spectrum in vibration diagnostics of rotary machine defects." VESTNIK of Samara University. Aerospace and Mechanical Engineering 19, no. 3 (2020): 100–108. http://dx.doi.org/10.18287/2541-7533-2020-19-3-100-108.

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The paper shows certain ambiguity of the narrow-band boundary of random processes obtained by different authors. The use of filters of different widths in obtaining the envelope spectrum makes it difficult to compare the obtained results by estimating the depth of amplitude modulation in vibration diagnostics of defects in rotary machines. We studied the results of bandpass filtering of the noise process only, as well as of amplitude-modulated noise. The analysis of the results of filtering of a broadband normal random process with constant spectral density and the representation of the spectr

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20

ZHAO, XIAO-HONG, and ZHAO-YANG PENG. "A POSSIBLE EXPLANATION OF ENERGY DEPENDENCE OF GRB PULSE WIDTH." International Journal of Modern Physics: Conference Series 23 (January 2013): 301–3. http://dx.doi.org/10.1142/s2010194513011513.

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Previous studies have found that the width of gamma-ray burst (GRB) pulse is energy dependent1-2 and its origin keeps unknown. Here we find combining the curvature effect and the intrinsic Band spectrum could naturally result in the energy dependence of GRB pulse width. Our result suggests that the GRB decay phase is indeed related to the so-called curvature effect. A natural expectation of our study is for bursts with single power law, not Band spectrum, pulse width will not be energy dependent in our consideration.

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21

Chen, Guoqiang, and Jianli Kang. "Spectrum Analysis with Adaptive Precision for Space Vector Pulse Width Modulation." International Journal of Signal Processing, Image Processing and Pattern Recognition 9, no. 8 (2016): 157–68. http://dx.doi.org/10.14257/ijsip.2016.9.8.14.

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22

Uddin, Mohammad Faisal, and Chadi Assi. "Joint Routing and Scheduling in WMNs with Variable-Width Spectrum Allocation." IEEE Transactions on Mobile Computing 12, no. 11 (2013): 2178–92. http://dx.doi.org/10.1109/tmc.2012.187.

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23

Tao, Zi, Li Zhi, and Jia Long. "The SPWM Pulse Width Signal Spectrum Analysis Based on MATLAB." Advanced Materials Research 756-759 (September 2013): 4147–51. http://dx.doi.org/10.4028/www.scientific.net/amr.756-759.4147.

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Based on the analysis of the characteristics of sine-wave pulse-width modulation (SPWM) and space vector pulse width modulation (SVPWM) [, the key points are the algorithm of various sampling methods of PWM signals and the analysis of those signals spectrum with MATLAB[4]. The foundational features of the harmonic distributions and advantages and disadvantages of various sampling methods are obtained. According to the analysis, some suggest can be given for the evaluation of pulse width modulation scheme. In the same time, some methods of optimization of pulse wave are advised to provide theor

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24

Melnikov, Valery M., and Richard J. Doviak. "Turbulence and Wind Shear in Layers of Large Doppler Spectrum Width in Stratiform Precipitation." Journal of Atmospheric and Oceanic Technology 26, no. 3 (2009): 430–43. http://dx.doi.org/10.1175/2008jtecha1108.1.

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Abstract Weather radar observations of stratiform precipitation often reveal regions having very large measured Doppler spectrum widths, exceeding 7, and sometimes 10, m s−1. These widths are larger than those typically found in thunderstorms; widths larger than 4 m s−1 are associated with moderate or severe turbulence in thunderstorms. In this work, stratiform precipitation has been found to have layers of widths larger than 4 m s−1 in more than 80% of cases studied, wherein the shear of the wind on scales that are large compared to the dimensions of the radar resolution volume is the dominan

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25

Xie, Ziyi, Junsong Peng, Mariia Sorokina, and Heping Zeng. "Design of Mode-Locked Fibre Laser with Non-Linear Power and Spectrum Width Transfer Functions with a Power Threshold." Applied Sciences 12, no. 20 (2022): 10318. http://dx.doi.org/10.3390/app122010318.

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There is a growing demand for higher computational speed and energy efficiency of machine learning approaches and, in particular, neural networks. Optical implementation of neural networks can address this challenge. Compared to other neuromorphic platforms, fibre-based technologies can unlock a wide bandwidth window and offer flexibility in dimensionality and complexity. Moreover, fibre represents a well-studied, low-cost and low-loss material, widely used for signal processing and transmission. At the same time, mode-locked fibre lasers offer flexibility and control, while the mode-locking e

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26

Fang, Ming, and Richard J. Doviak. "Coupled Contributions in the Doppler Radar Spectrum Width Equation." Journal of Atmospheric and Oceanic Technology 25, no. 12 (2008): 2245–58. http://dx.doi.org/10.1175/2007jtecha968.1.

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Abstract Contrary to accepted usage, the second central moment of the Doppler spectrum is not the sum of the second central moments of individual spectral broadening mechanisms. A rigorous theoretical derivation of the spectrum width observed with short dwell times reveals that the sum cannot strictly be taken for the variances associated with various spectral broadening mechanisms and that an added-term coupling shear with turbulence is needed. Furthermore, shear and antenna rotation are coupled. The theoretical expressions derived herein apply to radars with fixed or scanning beams.

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27

Ishii, Noriyoshi, Hideo Suganuma, and Hideo Matsufuru. "Thermal Width Broadening of the 0++Glueball Spectrum nearTc." Progress of Theoretical Physics Supplement 151 (2003): 166–70. http://dx.doi.org/10.1143/ptps.151.166.

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28

Harshman, N. L. "Visualizing the mass and width spectrum of unstable particles." American Journal of Physics 71, no. 10 (2003): 984–89. http://dx.doi.org/10.1119/1.1586264.

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29

Kılınç, Selçuk, and Gökhan Çabuk. "Spectrum of a frequency modulated pulse width modulation signal." International Journal of Circuit Theory and Applications 43, no. 3 (2013): 390–400. http://dx.doi.org/10.1002/cta.1948.

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30

Wang, Changyu, Yuan Xu, Hong Xu, and Juan Liu. "Holographic Lens Array for Solar Collector with Large Angle and Expanded Spectral Width." Applied Sciences 15, no. 10 (2025): 5354. https://doi.org/10.3390/app15105354.

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Holographic optical elements (HOEs) are promising for solar energy collection due to their advantages of lightweight and high efficiency, but the narrow reconstruction of their angular and spectral widths limits their application. This paper proposes a novel holographic lens array solar collector (HLASC), which can collect light from a large angle range with an expanded spectrum. The large acceptance angle is achieved by a holographic lens array with a large relative aperture. To expand the collection spectral width within a large incident angle, the collection spectrum is spatially allocated

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31

Hannan, E. J., and J. Rissanen. "The width of a spectral window." Journal of Applied Probability 25, A (1988): 301–7. http://dx.doi.org/10.2307/3214164.

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32

Hannan, E. J., and J. Rissanen. "The width of a spectral window." Journal of Applied Probability 25, A (1988): 301–7. http://dx.doi.org/10.1017/s0021900200040432.

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33

Chu, Y. H. "Effects of along- and cross-radar-beam winds on Doppler radar spectrum." Annales Geophysicae 23, no. 3 (2005): 681–92. http://dx.doi.org/10.5194/angeo-23-681-2005.

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Abstract. Beam broadening effects on the Doppler radar spectrum induced by along- and cross-radar-beam winds are theoretically investigated in this article. Analytical expression of beam broadening spectrum for a vertical beam subject to a constant vertical wind in the absence of horizontal wind is derived first. We find that the resultant beam broadening spectral shape is in an exponential form, rather than a Gaussian shape. The peak of the exponential spectrum corresponds to the true vertical wind velocity, and the spectral width σ is a function of vertical wind velocity w and the half-power

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Djenize, S. "On the stark width regularities in the singly ionized argon spectrum." Serbian Astronomical Journal, no. 160 (1999): 5–9. http://dx.doi.org/10.2298/saj9960005d.

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The existence of the Stark width dependence on the upper-level ionization potential of the quantum transition have been presented for the four types of transitions (4s? - 4p?, 4p? - 4d?, 4p - 5s, 3d - 4p?) in the singly ionized argon spectrum (Ar II). On the basis of established regularities the Stark width values for 6 spectral lines, not measured or calculated before, have been predicted. Critical analysis of the existing experimental Stark width data are, also, given.

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Danilov, V. N., V. M. Ushakov, and S. G. Evtushenko. "ON SOME FEATURES OF THE SIGNAL SPECTRA IN THE ULTRASONIC STUDY OF THE METAL STRUCTURE WITH INCREASED ATTENUATION OF LONGITUDINAL WAVES." Kontrol'. Diagnostika, no. 296 (February 2023): 13–21. http://dx.doi.org/10.14489/td.2023.02.pp.013-021.

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By the method of computer modeling, some features of the change in the frequency spectra of the bottom signals of direct high-frequency probes during ultrasonic investigation of the metal structure with different average grain sizes and the dispersion of their sizes have been established. It is shown that for probe models with frequencies f0 = 10; 15 MHz (with a frequency spectrum width at 0.25 from a maximum of 0.5f0), with an increase in the values of the average grain size and the dispersion of their sizes, an increase in the width of the signal spectra occurs due to the peculiarities of ch

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Su, Yu, Jian Hua Ren, Tong Gang Zhao, Shu Qun Shen, and Wei Wu. "Aperiodic Fiber Grating with Asymmetric Spectrum Structure and its Application in Filtering Technique." Advanced Materials Research 485 (February 2012): 157–60. http://dx.doi.org/10.4028/www.scientific.net/amr.485.157.

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An aperiodic fiber grating with asymmetric reflection spectrum structure is studied, and its spectrum characteristics are described by an introduced parameter, the spectrum profile slope, which can measure the spectrum asymmetric property. Based on the fiber gratings with asymmetric reflection spectra, a new sort of tunable narrow band-pass fiber grating filter is designed as its application, whose characteristics, namely working wavelength, band width, and tunable range, are analyzed as well.

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Wang, Li, and Feng Li. "Dynamic Spectrum Pricing with Secondary User’s Normal Demand Preference." Mobile Information Systems 2018 (March 1, 2018): 1–8. http://dx.doi.org/10.1155/2018/3572508.

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During secondary user’s dynamic access to authorized spectrum, a key issue is how to ascertain an appropriate spectrum price so as to maximize primary system’s benefit and satisfy secondary user’s diverse spectrum demands. In this paper, a scheme of pricing-based dynamic spectrum access is proposed. According to the diverse qualities of idle spectrum, the proposed scheme applies a Hotelling game model to form the spectrum pricing problem. Firstly, establish a model of spectrum leasing, among which the idle spectrum with different qualities constitutes a spectrum pool. Then, divide the idle spe

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Lan, Lan Ling, Yan Liu, Xue Rong Chang, et al. "High Power Ytterbium-Doped Fiber Super-Fluorescent Sources." Applied Mechanics and Materials 475-476 (December 2013): 1649–53. http://dx.doi.org/10.4028/www.scientific.net/amm.475-476.1649.

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The output characteristics of high power ytterbium-doped fiber super-fluorescent sources were analyzed. 75.7W output power can be achieved when the 915nm pump power is 100W, and the fiber length is 10m.when the pump power changes from 20 to 100W, the backward super-fluorescent power is always larger than the forward. The mean wavelength of the forward and backward super-fluorescent is very stable. The spectrum width all decrease. The spectrum width of forward ASE changes from 24.8nm to 21.4nm when the pump power changes from 20 to 100W. The spectrum width of backward ASE changes from 25.5nm to

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Li, Yunfeng, Liqin Wang, and Jian Guan. "A Spectrum Detection Approach for Bearing Fault Signal Based on Spectral Kurtosis." Shock and Vibration 2017 (2017): 1–9. http://dx.doi.org/10.1155/2017/6106103.

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According to the similarity between Morlet wavelet and fault signal and the sensitive characteristics of spectral kurtosis for the impact signal, a new wavelet spectrum detection approach based on spectral kurtosis for bearing fault signal is proposed. This method decreased the band-pass filter range and reduced the wavelet window width significantly. As a consequence, the bearing fault signal was detected adaptively, and time-frequency characteristics of the fault signal can be extracted accurately. The validity of this method was verified by the identifications of simulated shock signal and

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Liu, Cheng Xiang, Feng Li, and Xu Wu. "Simulation Research on the Coherence Properties of the Optical Fiber Source." Advanced Materials Research 466-467 (February 2012): 513–17. http://dx.doi.org/10.4028/www.scientific.net/amr.466-467.513.

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Based on Wiener-Khinchin theorem and Fourier transform, the coherence functions and the relevant parameters of various spectrums can be obtained from the simulation program. Through the analysis on the coherence properties of different spectrums, we also acquire the influence on the spectrum coherence of its characteristic parameters, such as the centre wavelength and the width. For the broadband sources used in the IFOG, the paper provides an effective calculation approach to acquire the accurate coherence functions and coherence parameters, which can be further used to analyze and optimize t

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Bai, Le Qiang, and Xue Wei Zhang. "Improved Window Function in the Application of MFCC Feature Parameter Extraction." Applied Mechanics and Materials 556-562 (May 2014): 3703–6. http://dx.doi.org/10.4028/www.scientific.net/amm.556-562.3703.

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In view of spectrum leakage and the contradictory problem of spectrum accuracy of main lobe and reducing spectrum leakage, MFCC algorithm based on improved window function is proposed. Improved window function is based on the mathematical analysis of Kaiser window, and under the condition of finite sampling points minuses weighted impact function where is at the frequencies that side lobe peaks of correspond to. The amplitude of improved window compared with Kaiser window is smaller, and main lobe width is the same, solving the conflicting problem of main lobe width and side lobe amplitude and

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Nechaev, D. I., O. N. Milekhina, M. S. Tomozova, and A. Y. Supin. "Discrimination of rippled spectra with various ripple widths in listeners with normal and impaired hearing." Сенсорные системы 38, no. 1 (2024): 79–88. http://dx.doi.org/10.31857/s0235009224010066.

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In listeners aged 26 to 82 years with various degrees of hearing loss (from normal to moderate), the frequency resolving power (FRP) was assessed as the resolved ripple density resolution in rippled-spectrum signals at various ripple widths. In normal-hearing listeners, FRP increased with narrowing the ripple width. In impaired-hearing listeners, the effect of narrowing the ripple width was minor. The difference between the normal- and impaired-hearing listeners could not be explained by the excitation pattern model of the rippled spectrum resolution. The temporal analysis model did explain th

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Hu, Shuo, Na Wu, and Xu Guang Zhang. "Effect of the Pixel Photosensor Width on the Recovered Spectral Intensity in Interferometric Imagers and the Correction." Advanced Materials Research 562-564 (August 2012): 1332–35. http://dx.doi.org/10.4028/www.scientific.net/amr.562-564.1332.

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The equation for the recovered spectrum is derived in spatially modulated interferometric imagers, which takes into account the pixel photosensor width. The results show that the effect of the pixel photosensor width on the recovered spectral intensity is related to the wavenumber and the intensity of the incident spectrum, which causes the broadband spectral waveform changed, and the distortion increases with the spectral bandwidth increasing. A mathematical algorithm is given to correct the distortion, and the experimental results show this method is effective.

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Björkqvist, Jan-Victor, Heidi Pettersson, and Kimmo K. Kahma. "The wave spectrum in archipelagos." Ocean Science 15, no. 6 (2019): 1469–87. http://dx.doi.org/10.5194/os-15-1469-2019.

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Abstract. Sea surface waves are important for marine safety and coastal engineering, but mapping the wave properties at complex shorelines, such as coastal archipelagos, is challenging. The wave spectrum, E(f), contains a majority of the information about the wave field, and its properties have been studied for decades. Nevertheless, any systematic research into the wave spectrum in archipelagos has not been made. In this paper we present wave buoy measurements from 14 locations in the Finnish archipelago. The shape of the wave spectrum showed a systematic transition from a single-peaked spect

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Zhang, Meng, Tianyi Zhang, Hui Tang, et al. "Low-Polarization, Broad-Spectrum Semiconductor Optical Amplifiers." Nanomaterials 14, no. 11 (2024): 969. http://dx.doi.org/10.3390/nano14110969.

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Polarization-insensitive semiconductor optical amplifiers (SOAs) in all-optical networks can improve the signal-light quality and transmission rate. Herein, to reduce the gain sensitivity to polarization, a multi-quantum-well SOA in the 1550 nm band is designed, simulated, and developed. The active region mainly comprises the quaternary compound InGaAlAs, as differences in the potential barriers and wells of the components cause lattice mismatch. Consequently, a strained quantum well is generated, providing the SOA with gain insensitivity to the polarization state of light. In simulations, the

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Partamies, N., M. Syrjäsuo, E. Donovan, et al. "Observations of the auroral width spectrum at kilometre-scale size." Annales Geophysicae 28, no. 3 (2010): 711–18. http://dx.doi.org/10.5194/angeo-28-711-2010.

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Abstract. This study examines auroral colour camera data from the Canadian Dense Array Imaging SYstem (DAISY). The Dense Array consists of three imagers with different narrow (compared to all-sky view) field-of-view optics. The main scientific motivation arises from an earlier study by Knudsen et al. (2001) who used All-Sky Imager (ASI) combined with even earlier TV camera observations (Maggs and Davis, 1968) to suggest that there is a gap in the distribution of auroral arc widths at around 1 km. With DAISY observations we are able to show that the gap is an instrument artifact and due to limi

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Hiraiwa, Atsushi, and Akio Nishida. "Power Spectrum of Smoothed Line-Edge and Line-Width Roughness." Japanese Journal of Applied Physics 50, no. 8R (2011): 086502. http://dx.doi.org/10.7567/jjap.50.086502.

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Kondo, Hirotaka, and Tsunehiko Nakanishi. "Measurement of Vehicle Width by Analyzing Spectrum Envelope of Image." IEEJ Transactions on Electronics, Information and Systems 115, no. 11 (1995): 1304–9. http://dx.doi.org/10.1541/ieejeiss1987.115.11_1304.

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Hiraiwa, Atsushi, and Akio Nishida. "Power Spectrum of Smoothed Line-Edge and Line-Width Roughness." Japanese Journal of Applied Physics 50, no. 8 (2011): 086502. http://dx.doi.org/10.1143/jjap.50.086502.

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Lundin, A. A., and V. E. Zobov. "Decoherence-Induced Stabilization of the Multiple-Quantum NMR-Spectrum Width." Applied Magnetic Resonance 47, no. 7 (2016): 701–10. http://dx.doi.org/10.1007/s00723-016-0770-z.

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