Relevant bibliographies by topics / Oscillation period

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Oscillation period'

Author: Grafiati
Published: 4 June 2021
Last updated: 13 February 2022

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Journal articles on the topic "Oscillation period"

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Potkonjak, N., Lj Kolar-Anić, T. Potkonjak, S. Nikola Blagojević, and S. Anić. "Oscillatory Phenomena during Anodic Copper Electrodissolution in Trifluoroacetic Acid Solution." Materials Science Forum 518 (July 2006): 301–6. http://dx.doi.org/10.4028/www.scientific.net/msf.518.301.

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This work presents the current oscillation phenomena observed in an electrochemical Cu/0.5 M CF3COOH system. The dynamical response of this new oscillator was followed by both current density-potential (j-E) and current density-time (j-t) curves. The current oscillation phenomena of the investigated system were monitored over various potential scan rates and constant applied potentials as control parameters. The increase of potential scan rate significantly decreases both the potential range of current oscillations and the frequency of oscillations. At the j-t curves both the simple and the complex (period adding) oscillations were found. Moreover, with the increase of applied potential, the increase of period of oscillations and current oscillation amplitudes were observed. It appears that the period of current oscillations exponentially grows with applied potential.
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Dinh, Nguyen Van. "A note on the method of harmonic balance." Vietnam Journal of Mechanics 23, no. 1 (April 1, 2001): 34–38. http://dx.doi.org/10.15625/0866-7136/9938.

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Free oscillation period of the Duffing oscillator with cubic non-linearity was examined. A comparison between the exact period and those obtained by the asymptotic and the harmonic balance methods was done. It was shown that the remits given by the harmonic balance are acceptable even for large oscillations whereas the asymptotic method can only be applied for small oscillations.
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Kaur, Manpreet, Amy Ng, Pyonghwa Kim, Casey Diekman, and Yong-Ick Kim. "CikA Modulates the Effect of KaiA on the Period of the Circadian Oscillation in KaiC Phosphorylation." Journal of Biological Rhythms 34, no. 2 (February 13, 2019): 218–23. http://dx.doi.org/10.1177/0748730419828068.

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Cyanobacteria contain a circadian oscillator that can be reconstituted in vitro. In the reconstituted circadian oscillator, the phosphorylation state of KaiC oscillates with a circadian period, spending about 12 h in the phosphorylation phase and another 12 h in the dephosphorylation phase. Although some entrainment studies have been performed using the reconstituted oscillator, they were insufficient to fully explain entrainment mechanisms of the cyanobacterial circadian clock due to the lack of input pathway components in the in vitro oscillator reaction mixture. Here, we investigate how an input pathway component, CikA, affects the phosphorylation state of KaiC in vitro. In general, CikA affects the amplitude and period of the circadian oscillation of KaiC phosphorylation by competing with KaiA for the same binding site on KaiB. In the presence of CikA, KaiC switches from its dephosphorylation phase to its phosphorylation phase prematurely, due to an early release of KaiA from KaiB as a result of competitive binding between CikA and KaiA. This causes hyperphosphorylation of KaiC and lowers the amplitude of the circadian oscillation. The period of the KaiC phosphorylation oscillation is shortened by adding increased amounts of CikA. A constant period can be maintained as CikA is increased by proportionally decreasing the amount of KaiA. Our findings give insight into how to reconstitute the cyanobacterial circadian clock in vitro by the addition of an input pathway component, and explain how this affects circadian oscillations by directly interacting with the oscillator components.
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Olshanskii, Vasiliy, and Stanislav Olshanskii. "Modeling the motion of an oscillator with a soft elastic characteristic." Physico-mathematical modelling and informational technologies, no. 25 (May 25, 2017): 113–24. http://dx.doi.org/10.15407/fmmit2017.25.113.

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The free oscillations of a system with one degree of freedom are considered under the assumption that the elasticity of a spring is proportional to the cubic root of its deformation. Two forms of the analytical solution of the nonlinear differential equation of motion of the oscillator are obtained. In the first displacement of the oscillator in time is expressed in terms of incomplete elliptic integrals of the first and second kind. In the second form, the solution is expressed in terms of periodic Ateb-functions. The tables of the involved functions are made, which simplify the calculation. Formulas are also derived for calculating the oscillation periods when the oscillator is signaled or the initial deviation from the equilibrium position or the initial velocity (instantaneous pulse) in this position. The dependence of the oscillation period on the parameters of the oscillator and the initial conditions is established. Examples of calculations of oscillations are presented with the use of compiled tables of special functions and using the proposed approximations of the Ateb-functions. Comparison of numerical results obtained by different methods is made.
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Hocke, K., S. Studer, O. Martius, D. Scheiben, and N. Kämpfer. "A 20-day period standing oscillation in the northern winter stratosphere." Annales Geophysicae 31, no. 4 (April 25, 2013): 755–64. http://dx.doi.org/10.5194/angeo-31-755-2013.

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Abstract. Observations of the ozone profile by a ground-based microwave radiometer in Switzerland indicate a dominant 20-day oscillation in stratospheric ozone, possibly related to oscillations of the polar vortex edge during winter. For further understanding of the nature of the 20-day oscillation, the ozone data set of ERA Interim meteorological reanalysis is analyzed at the latitude belt of 47.5° N and in the time from 1979 to 2010. Spectral analysis of ozone time series at 7 hPa indicates that the 20-day oscillation is maximal at two locations: 7.5° E, 47.5° N and 60° E, 47.5° N. Composites of the stream function are derived for different phases of the 20-day oscillation of stratospheric ozone at 7 hPa in the Northern Hemisphere. The streamline at Ψ = −2 × 107 m2 s−1 is in the vicinity of the polar vortex edge. The other streamline at Ψ = 4 × 107 m2 s1 surrounds the Aleutian anticyclone and goes to the subtropics. The composites show 20-day period standing oscillations at the polar vortex edge and in the subtropics above Northern Africa, India, and China. The 20-day period standing oscillation above Aral Sea and India is correlated to the strength of the Aleutian anticyclone.
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Ševčík, Peter, and Ľubica Adamčíková. "Bromine and period of Belousov-Zhabotinskii type oscillation reaction." Collection of Czechoslovak Chemical Communications 50, no. 4 (1985): 799–805. http://dx.doi.org/10.1135/cccc19850799.

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Belousov-Zhabotinskii type oscillation reaction with oxalic acid proceeds in a closed system, in a flow-through open system, as well as under intermediate conditions. Oscillations are started in either of the following three ways: 1) Increasing the removal of bromine from solution by bubbling inert gases, 2) chemically, and 3) in a flow-through reactor. The oscillation period is largely dependent on the removal rate of bromine, other reactant concentrations being constant.
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Bao, Weili, and Jian-Young Wu. "Propagating Wave and Irregular Dynamics: Spatiotemporal Patterns of Cholinergic Theta Oscillations in Neocortex In Vitro." Journal of Neurophysiology 90, no. 1 (July 2003): 333–41. http://dx.doi.org/10.1152/jn.00715.2002.

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Neocortical “theta” oscillation (5–12 Hz) has been observed in animals and human subjects but little is known about how the oscillation is organized in the cortical intrinsic networks. Here we use voltage-sensitive dye and optical imaging to study a carbachol/bicuculline induced theta (∼8 Hz) oscillation in rat neocortical slices. The imaging has large signal-to-noise ratio, allowing us to map the phase distribution over the neocortical tissue during the oscillation. The oscillation was organized as spontaneous epochs and each epoch was composed of a “first spike,” a “regular” period (with relatively stable frequency and amplitude), and an “irregular” period (with variable frequency and amplitude) of oscillations. During each cycle of the regular oscillation, one wave of activation propagated horizontally (parallel to the cortical lamina) across the cortical section at a velocity of ∼50 mm/s. Vertically the activity was synchronized through all cortical layers. This pattern of one propagating wave associated with one oscillation cycle was seen during all the regular cycles. The oscillation frequency varied noticeably at two neighboring horizontal locations (330 μm apart), suggesting that the oscillation is locally organized and each local oscillator is about ≤300 μm wide horizontally. During irregular oscillations, the spatiotemporal patterns were complex and sometimes the vertical synchronization decomposed, suggesting a de-coupling among local oscillators. Our data suggested that neocortical theta oscillation is sustained by multiple local oscillators. The coupling regime among the oscillators may determine the spatiotemporal pattern and switching between propagating waves and irregular patterns.
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Sneyd, James, Jung Min Han, Liwei Wang, Jun Chen, Xueshan Yang, Akihiko Tanimura, Michael J. Sanderson, Vivien Kirk, and David I. Yule. "On the dynamical structure of calcium oscillations." Proceedings of the National Academy of Sciences 114, no. 7 (February 1, 2017): 1456–61. http://dx.doi.org/10.1073/pnas.1614613114.

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Oscillations in the concentration of free cytosolic Ca2+ are an important and ubiquitous control mechanism in many cell types. It is thus correspondingly important to understand the mechanisms that underlie the control of these oscillations and how their period is determined. We show that Class I Ca2+ oscillations (i.e., oscillations that can occur at a constant concentration of inositol trisphosphate) have a common dynamical structure, irrespective of the oscillation period. This commonality allows the construction of a simple canonical model that incorporates this underlying dynamical behavior. Predictions from the model are tested, and confirmed, in three different cell types, with oscillation periods ranging over an order of magnitude. The model also predicts that Ca2+ oscillation period can be controlled by modulation of the rate of activation by Ca2+ of the inositol trisphosphate receptor. Preliminary experimental evidence consistent with this hypothesis is presented. Our canonical model has a structure similar to, but not identical to, the classic FitzHugh–Nagumo model. The characterization of variables by speed of evolution, as either fast or slow variables, changes over the course of a typical oscillation, leading to a model without globally defined fast and slow variables.
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Chang, Pao-Liang, Wei-Ting Fang, Pin-Fang Lin, and Yu-Shuang Tang. "Influence of Wind-Induced Antenna Oscillations on Radar Observations and Its Mitigation." Weather and Forecasting 35, no. 6 (December 2020): 2235–54. http://dx.doi.org/10.1175/waf-d-20-0064.1.

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AbstractAs Typhoon Goni (2015) passed over Ishigaki Island, a maximum gust speed of 71 m s−1 was observed by a surface weather station. During Typhoon Goni’s passage, mountaintop radar recorded antenna elevation angle oscillations, with a maximum amplitude of ~0.2° at an elevation angle of 0.2°. This oscillation phenomenon was reflected in the reflectivity and Doppler velocity fields as Typhoon Goni’s eyewall encompassed Ishigaki Island. The main antenna oscillation period was approximately 0.21–0.38 s under an antenna rotational speed of ~4 rpm. The estimated fundamental vibration period of the radar tower is approximately 0.25–0.44 s, which is comparable to the predominant antenna oscillation period and agrees with the expected wind-induced vibrations of buildings. The reflectivity field at the 0.2° elevation angle exhibited a phase shift signature and a negative correlation of −0.5 with the antenna oscillation, associated with the negative vertical gradient of reflectivity. FFT analysis revealed two antenna oscillation periods at 0955–1205 and 1335–1445 UTC 23 August 2015. The oscillation phenomenon ceased between these two periods because Typhoon Goni’s eye moved over the radar site. The VAD analysis-estimated wind speeds at a range of 1 km for these two antenna oscillation periods exceeded 45 m s−1, with a maximum value of approximately 70 m s−1. A bandpass filter QC procedure is proposed to filter out the predominant wavenumbers (between 40 and 70) for the reflectivity and Doppler velocity fields. The proposed QC procedure is indicated to be capable of mitigating the major signals resulting from antenna oscillations.
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Darelius, E., I. Fer, T. Rasmussen, C. Guo, and K. M. H. Larsen. "On the modulation of the periodicity of the Faroe Bank Channel overflow instabilities." Ocean Science Discussions 12, no. 3 (May 21, 2015): 823–61. http://dx.doi.org/10.5194/osd-12-823-2015.

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Abstract. The Faroe Bank Channel (FBC) is one of the major pathways where dense, cold water formed in the Nordic Seas flows southward towards the north Atlantic. The plume region downstream of the FBC sill is characterized by high mesoscale variability, quasi-regular oscillations and intense mixing. Here, one year-long time series of velocity and temperature from eight moorings deployed in May 2012 in the plume region is analyzed to describe variability in the strength and period of the oscillations. The eddy kinetic energy (EKE) associated with the oscillations is modulated with a factor of ten during the year and the dominant period of the oscillations changes between three to four and six days, where the shorter period oscillations are more energetic. The dense water is observed on a wider portion of the slope (both deeper and shallower) during periods with energetic, short period oscillations. The observations are complemented by results from a regional, high resolution model that shows a similar variability in EKE and a gradual change in oscillation period between three and four days. The observed variability in oscillation period is directly linked to changes in the volume transport across the sill: the oscillation period decreases with about six days Sv−1 both in the observations and in the model. This is in agreement with results from linear instability analysis which suggests that the period and growth rate decrease for decreased plume thickness. The changes in oscillation period can partly be explained by variability in the upper layer, background flow and advection of the oscillations past the stationary moorings, but the changes in the fraction of the EKE that is derived from the cross isobath motion suggests that the intrinsic period of the instability is modulated. It is further shown that about 50% of the transport variability across the sill is explained by changes in the local barotropic forcing, which is obtained from satellite altimetry.
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Dissertations / Theses on the topic "Oscillation period"

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Grác, David. "Měření momentů setrvačnosti vozidla." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231201.

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This diploma thesis is concerned with selecting the appropriate method for determining the moment of inertia to the vertical, lateral and longitudinal axis through the centre of gravity of the vehicle. Using the special mechanical device, constructed on IAE was carried out repeated measurements of known mass properties in each axis. With the aid of obtained data was calculated measurement error. To compare the resulting values was created MBS model.
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Toman, Josef. "Zařízení pro měření výškové polohy těžiště vozidla." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231246.

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This diploma thesis deals with measurement of vehicle centre of gravity height position. In the first part is created summary of methods used for measuring centre of gravity position and moment of inertia of the vehicle. In the other parts are designed and analyzed two dynamics method of measuring centre of gravity height position. This thesis presents analysis of the errors of the proposed methods, results of measurements and design of the construct adjustments device for measuring of the moments of inertia enabling its used for measuring centre of gravity height position. Some components are through analyse of tension.
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Hanych, Jaroslav. "Konstrukční návrh zařízení pro měření výškové polohy těžiště vozidla." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-378015.

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This master's thesis deals with problems connected with measuring vehicle centre of gravity height. The research part summarizes generally known methods of measuring vehicle centre of gravity and moments of inertia. Essential part of this thesis is the design of a device for measuring the centre of gravity height of a road vehicle on a principle of measuring a period of oscillation. The height position of the platform of the device is adjustable through hydraulic cylinders. A stress-strain analysis of the design was executed through a combination of analytical methods and a finite element method. The process of measurement was described and an equation for determination of centre of gravity height was deduced. Error of measurement was estimated based on the knowledge of partial errors of measured values.
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Kotaška, Stanislav. "Měření větrových oscilačních vln na nádrži." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-391947.

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This diploma thesis deals with the measurement of wind oscillation waves on reservoirs, especially with regard to the determination of wave properties with a focus on the spectral density. The thesis presents the basics of the theory of creation and propagation of wind oscillation waves, the recherche of measuring devices and a description of the pilot measurement with the processing of measured data in the MATLAB environment using the software tool WAFO. Attached to the CD are sample scripts for data processing from the resistance sensor.
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Andrews, David Jeremy. "Planetary-period oscillations in Saturn's magnetosphere." Thesis, University of Leicester, 2011. http://hdl.handle.net/2381/9995.

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This thesis is concerned with the study of near-planetary rotation period oscillations in Saturn’s magnetic field. Similar oscillations are present in a variety of other magnetospheric phenomena, most notably kilometre-wavelength radio emissions, and together they have a substantial influence throughout the Saturnian plasma environment. However, their origin remains poorly understood, despite more than a decade of study. Surprising new discoveries have been made regarding the seasonality of these oscillatory phenomena, and their intrinsic connection to the high-latitude upper atmosphere and ionosphere of the planet, though a complete theory of their origin remains to be developed. In this thesis, three detailed studies of this phenomenon are presented, each of which uses magnetic field data recently obtained by the Cassini spacecraft. The first consists of an extensive survey of near-equatorial field data during southern summer, from which the structure of the rotating oscillations is determined and the electrical currents flowing through the equatorial plane are calculated. The second study is prompted by the recent discovery of a north-south asymmetry in the period of related radio emissions, and consists of a survey of high-latitude magnetic field data in which evidence for a corresponding asymmetry in the magnetic field rotation period is found. Finally, the third study concerns the presence of long-termdrifts between the phase of the magnetic field oscillation and the Saturn kilometric radiation (SKR) modulation, which, through construction of a simple theoretical model, is shown to arise as a consequence of ‘rotational’ modulations in the SKR rather than the hitherto assumed ‘strobe-like’ modulations. These three studies substantially further our understanding of these phenomena, and in the case of the detection of a rotational modulation in the SKR overturn three decades of previous thought. Consequently, the results presented here elucidate characteristics of these phenomena that any theoretical understanding of their origin must serve to explain, and will therefore be of central importance in further development of this topic in the future. Before presenting these three studies, an introduction to the topics of space plasma physics and planetary magnetospheres is presented in Chapter 1. This is followed in Chapter 2 with a discussion of Saturn’s magnetosphere, and the topic of near-planetary period oscillations, and in Chapter 3 by descriptions of the instruments with which data used in this thesis have been obtained.
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Kubica, Petr. "Zařízení pro měření výškové polohy těžiště vozidla." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-232123.

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This diploma thesis deals the with measurment of the centre of gravity height position of a road vehicle and its issues. The introduction of this thesis focuses on the determining of the position of the center of gravity and the moment of inertia of a road vehicle. The next part is about creationing of a construction plan and its verification. The thesis contains a sensitivity analysis of this device including its results. The end of the thesis informs about the executed measurment in a laboratory and about recommendations for next measurments.
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Lacot, Eric. "Dynamique d'un laser à fibre dopée Er3+." Grenoble 1, 1992. http://www.theses.fr/1992GRE10202.

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La dynamique d'un laser a fibre dopee er#3#+ a ete analysee aussi bien en regime de pompage continu qu'en regime de pompage module. En pompage continu, lorsque l'on augmente la puissance de pompe, le laser atteint un second seuil et une bifurcation de hopf apparait menant le laser d'un regime de fonctionnement continu a un regime de fonctionnement pulse. Une etude de l'influence des parametres aussi bien intrinseques (dopage, longueur,. . . ) que extrinseques (pompage, cavite,. . . ) nous a permis de determiner dans un espace de parametres propres au laser la frontiere entre les differents regimes de fonctionnement. Nous avons aussi pu observer, aussi bien en regime de fonctionnement continu qu'en regime de fonctionnement pulse, que le comportement transitoire de l'intensite totale du laser est en fait la somme des comportements transitoires de deux etats orthogonaux de polarisation. En regime transitoire (reponse a un pompage en echelon) le laser a fibre presente des oscillations de relaxation. C'est en modulant la puissance de pompe de maniere sinusoidale au voisinage de la frequence de relaxation que nous avons pu observer dans le comportement dynamique du laser a fibre une cascade de doublement de periodes conduisant a un fonctionnement chaotique. Nous avons developpe un modele semi-classique decrivant de la dynamique du laser a fibre dopee. Cette dynamique est parfaitement decrite par un modele de deux lasers couples pompes de maniere coherente. La transition entre le regime continu et le regime pulse est bien decrite ainsi que les deux etats propres de polarisation et le comportement chaotique
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Clarke, Kay Elizabeth. "Magnetospheric period oscillations of Saturn’s magnetopause and bow shock." Thesis, University of Leicester, 2010. http://hdl.handle.net/2381/8313.

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In this thesis we show that Saturn’s magnetopause and bow shock oscillate with a period near that of planetary rotation that we term the ‘magnetospheric period’. In our first study, using two Cassini orbits as exemplars, we demonstrate that Saturn’s magnetopause oscillates at the magnetospheric period in response to changes in the magnetospheric pressure. The change in internal pressure required to produce such oscillations, which typically correspond to a ~10% change in the boundary radius, is estimated to be ~30-40% of the unperturbed background pressure. In our second study we develop a simple theoretical model of motion through an oscillating planar boundary that is equally applicable to the magnetopause and the bow shock. In our third study we use data from ~40 Cassini orbits to conduct a first systematic investigation of the magnetospheric period magnetopause oscillations. We show that boundary oscillation events are highly organized by the phase of the magnetic oscillations in the ‘core’ region of the magnetosphere. When radial propagation is accounted for, the phase of maximum outward boundary displacement is found to be directly related to the phase of the density maximum in the Enceladus torus. The boundary oscillation amplitude is estimated to be ~1.2 Saturn radii, but is occasionally as great as ~4-5 Saturn radii. In our fourth study we use data from 35 Cassini orbits that crossed both the magnetopause and the bow shock to provide first evidence for magnetospheric period bow shock oscillations. We find that the oscillations are significantly organized by the phase of the ‘core’ magnetosphere magnetic oscillations, though the degree of organization is less than for the magnetopause. The bow shock and magnetopause are found to oscillate approximately in phase within a phase uncertainty of about ± 25° and to have similar oscillation amplitudes.
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Jacobi, Christoph, Nadja Samtleben, and Gunter Stober. "Meteor radar observations of mesopause region long-period temperature oscillations." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-212263.

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Meteor radar observations of mesosphere/lower thermosphere (MLT) daily temperatures have been performed at Collm, Germany since August 2004. The data have been analyzed with respect to long-period oscillations at time scales of 2–30 days. The results reveal that oscillations with periods of up to 6 days are more frequently observed during summer, while those with longer periods have larger amplitudes during winter. The oscillations may be considered as the signature of planetary waves. The results are compared with analyses from radar wind measurements. Moreover, the temperature oscillations show considerable year-to-year variability. In particular, amplitudes of the quasi 5-day oscillation have increased during the last decade, and the quasi 10-day oscillations are larger if the equatorial stratospheric winds are eastward.
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Jacobi, Christoph, Rudolf Schminder, and Dierk Kürschner. "Long-period (2-18 Days) oscillations of mesopause winds at Collm." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-213040.

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Daily analyses of the zonal and meridional prevailing wind at the mesopause ( - 95 km height) are investigated with respect to planetary wave scale oscillations with periods ranging between 2 and 18 days. A mean climatology of the years 1983 - 1994 is presented. Time series of planetary wave activity show a significant increase during this period, which is in accordance with results from literature
Tägliche Analysen des zonalen und meridionalen Grundwindes in der Mesopausenregion (- 95 km Höhe) werden hinsichtlich planetarer Wellenaktivität im Periodenbereich von 2 bis 18 Tagen untersucht. Es wird eine mittlere Klimatologie der Jahre 1983 - 1994 dargestellt. In diesem Zeitraum ist eine signifikante Zunahme der Wellenaktivität zu verzeichnen, die in Übereinstimmung mit Literaturangaben steht
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Books on the topic "Oscillation period"

1

John, Stanford. Oscillations in D-region absorption at periods of one to two months. [Washington, D.C: National Aeronautics and Space Administration, 1989.

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John, Stanford. Oscillations in D-region absorption at periods of one to two months. [Washington, D.C: National Aeronautics and Space Administration, 1989.

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Zhen dong xing yu zhou qi jie li lun de yan jiu. Bei jing: Guo fang gong ye chu ban she, 2014.

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Parkinson, W. H. Determination of band oscillator strengths of atmospheric molecules from high resolution vacuum ultraviolet cross section measurements: Semiannual status report no. 1 for the period 1 November 1984 through 30 April 1985. Cambridge, MA: Smithsonian Institution, Astrophysical Laboratory, 1985.

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Bensoussan, Alain. Asymptotic analysis for periodic structures. Providence, R.I: American Mathematical Society, 2011.

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Montgomery, Erwin B. Oscillator Basics. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780190259600.003.0016.

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This chapter uses metaphors to help programmers picture the basic concepts of oscillators. At the least, DBS can be considered as oscillatory stimulation of the nervous system and increasingly, it is likely that the nervous system operates on the bases of neuronal and neural oscillators. Thus, a fundamental understanding of oscillators, particularly their features, is important. The defining feature of oscillatory activity is the recurrence or repetition of a phenomenon, such as the repetitive flashing of a light at a railroad crossing. This chapter uses the metaphor of a racecar circling on a racetrack that become increasing more complicated. The metaphors provide an appreciation of the features and properties of oscillators, such as amplitude, frequency, phase, period, and reasonance. The metaphors also provide an intuitive understanding of the methods used to decompose and analyze complex oscillators such as the Fourier Transform.
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Almost Periodic Oscillations and waves. Springer, 2009.

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Thompson, William R., and Leila Zakhirova. Revising the Framework: Energy and Eurasian History. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780190699680.003.0003.

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This chapter first theorizes as if each system leader has been similar in terms of the resource foundations it has brought to the arena and what it has been able to do with those foundations. Earlier leaders were much weaker than later leaders. What accounts for the difference? Our answer is that system leaders have had variable claims to leads in commerce, technology, and energy. When they combined all three, they became very powerful. The chapter then addresses one of the central issues of Big History: the swinging of the socioeconomic, military, and political lead from western Eurasia to eastern Eurasia and back to western Eurasia and North America in what is sometimes referred to as the “Great Divergence.” This oscillation was put in motion by the discovery of agricultural techniques that gave the West a lead to innovate all sorts of things. Gradually the East caught up, until at one point Rome and Han China were roughly equal. After Rome declined and the Han Empire fragmented, China came back in the Sui–Tang–Song dynasty period, while western Europe remained fragmented. However, the medieval Chinese lead did not persist. Ultimately, the West was able to forge ahead by combining new energy sources and technology. Now, China may be catching up once again.
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An investigation of short period oscillations of the solar irradiance and their time variations: Final report. [Washington, DC: National Aeronautics and Space Administration, 1987.

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Jones, Christopher R. Neurobiology of Circadian Rhythms Disorders. Oxford University Press, 2017. http://dx.doi.org/10.1093/med/9780199937837.003.0175.

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Temporal organization of nervous system function includes daily rhythms driven by a molecular-genetic hypothalamic “clock” with an intrinsic period length of approximately (circa) one day (diem). The resulting circadian rhythm influences all aspects of brain function and internally synchronizes the circadian oscillations inherent in all other body tissues. Idiosyncratic circadian characteristics interact with perceived environmental stimuli to determine each individual’s entrainment pattern of external synchronization with the day-night cycle. Idiosyncratic entrainment patterns that may come to medical attention include delayed, free-running, advanced, or absent sleep rhythms. Prolonged jet travel and shift work are difficult entrainment challenges for most people.
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Book chapters on the topic "Oscillation period"

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Jiménez, A., P. L. Pallé, C. Régulo, T. Roca Cortés, G. R. Isaak, C. P. McLeod, and H. B. van der Raay. "The 13 Day Period Oscillation and the Solar Cycle." In Advances in Helio- and Asteroseismology, 211–14. Dordrecht: Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-009-4009-3_47.

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Hanazaki, H. "Double-period oscillation of passive scalar flux in stratified turbulence." In Springer Proceedings in Physics, 447–48. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-03085-7_107.

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Holton, James R. "The Quasi-Biennial Oscillation in the Earth’s Atmosphere and its Links to Longer Period Variability." In The Solar Engine and Its Influence on Terrestrial Atmosphere and Climate, 259–73. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-79257-1_16.

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Di Lorenzo, Renato. "Oscillation Periods." In Perspectives in Business Culture, 79–82. Milano: Springer Milan, 2013. http://dx.doi.org/10.1007/978-88-470-5421-9_5.

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Glaser, Rainer, Marco Downing, Ethan Zars, Joseph Schell, and Carmen Chicone. "Video-Based Kinetic Analysis of Period Variations and Oscillation Patterns in the Ce/Fe-Catalyzed Four-Color Belousov–Zhabotinsky Oscillating Reaction." In ACS Symposium Series, 251–70. Washington, DC: American Chemical Society, 2019. http://dx.doi.org/10.1021/bk-2019-1316.ch015.

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Zhou, Tianshou. "Periodic Oscillation." In Encyclopedia of Systems Biology, 1672–78. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4419-9863-7_520.

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Brown, B. Malcolm, Michael S. P. Eastham, and Karl Michael Schmidt. "Oscillations." In Periodic Differential Operators, 31–65. Basel: Springer Basel, 2012. http://dx.doi.org/10.1007/978-3-0348-0528-5_2.

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Gelig, Arkadii Kh, and Alexander N. Churilov. "Forced Periodic Oscillations. Method of Equations of Periods." In Stability and Oscillations of Nonlinear Pulse-Modulated Systems, 129–67. Boston, MA: Birkhäuser Boston, 1998. http://dx.doi.org/10.1007/978-1-4612-1760-2_5.

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Xiong, D. R., L. Deng, and Q. L. Cheng. "Oscillations of Long-Period Variables." In New Eyes to See Inside the Sun and Stars, 399–400. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-4982-2_90.

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Rabinovich, M. I., and D. I. Trubetskov. "Periodic Self-Excited Oscillations." In Oscillations and Waves, 299–308. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-1033-1_14.

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Conference papers on the topic "Oscillation period"

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Wang, Yongqiang, Yutaka Hori, Shinji Hara, and Francis J. Doyle. "The collective oscillation period of inter-coupled Goodwin oscillators." In 2012 IEEE 51st Annual Conference on Decision and Control (CDC). IEEE, 2012. http://dx.doi.org/10.1109/cdc.2012.6426590.

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Xu, Fayao, Huiying Wu, and Zhenyu Liu. "Flow Patterns During Flow Boiling Instability in Silicon-Based Pin-Fin Microchannels." In ASME 2016 Heat Transfer Summer Conference collocated with the ASME 2016 Fluids Engineering Division Summer Meeting and the ASME 2016 14th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/ht2016-7387.

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Flow patterns during boiling instability of deionized water across silicon-based microchannels with inner pin-fin arrays have been studied experimentally. Three types of microchannels with different pin-fin structures and a hydraulic diameter of 210 μm were used. During the unstable flow boiling, two types of instability modes of temperature and pressure oscillations occurred: long-period/large-amplitude oscillation mode and short-period/small-amplitude oscillation mode. There were increasing and decreasing stages of the temperature measurement during a period of long-period/large-amplitude oscillation mode. According to visualization observation, in the increasing stage of temperature oscillation for the in-line pin-fin microchannel, four two-phase flow patterns, including bubbly flow, vapor-slug flow, stratified flow, and stream flow, occurred sequentially with time; for the staggered pin-fin microchannels, the four two-phase flow patterns, together with single liquid-phase flow and single vapor-phase flow occurred sequentially with time. The flow pattern transitions were inverse between the increasing and decreasing stages of temperature measurement. Under the short-period/small-amplitude oscillation mode, only the stream flow occurred. With the increase of heat flux, the stream flow and the single vapor-phase flow occupied more and more time ratio during an oscillation period in the in-line and staggered pin-fin microchannels, respectively.
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Poppe, A., A. Fürbach, Ch Spielmann, and F. Krausz. "Electronics on the time scale of the light oscillation period?" In Ultrafast Electronics and Optoelectronics. Washington, D.C.: OSA, 1999. http://dx.doi.org/10.1364/ueo.1999.uwc1.

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Elissati, Oussama, Eslam Yahya, Laurent Fesquet, and Sebastien Rieubon. "Oscillation period and power consumption in configurable self-timed ring oscillators." In 2009 Joint IEEE North-East Workshop on Circuits and Systems and TAISA Conference (NEWCAS-TAISA). IEEE, 2009. http://dx.doi.org/10.1109/newcas.2009.5290439.

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Sharma, Sheshadri, and Richard Rodrigues Jettappa. "A Method to Determine the Exact Time Period of Oscillations of a Bifilar Pendulum." In ASME Turbo Expo 2010: Power for Land, Sea, and Air. ASMEDC, 2010. http://dx.doi.org/10.1115/gt2010-23531.

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A novel method to determine the exact time period of oscillations of a class of non-linear systems is presented. Taking the bifilar pendulum as an example, and employing the conservation of total energy concept, the free oscillations of the system is studied. The governing equation of motion of a bifilar pendulum is non-linear. The integration of this equation to obtain the time period of oscillation is highly complicated and only numerical solution is available. This is because the integral is singular at the extremities of the motion where the velocity will be zero. But, what cannot be achieved by integral calculus can be obtained easily by employing the definition of velocity taught in the high school curriculum. By employing this simple mathematical trick, this intractable equation is recast in a different but exact form. This leads to the identification of what is called the “Geometric Inertia” in bifilar pendulums. This Geometric Inertia is the additional inertia displayed by the system due to the constraint imposed by the two filaments as a result of the geometry of the pendulum. In the proposed method, the total displacement of the system is considered and divided into small equal segments. At the end points of each such segment, the corresponding velocity is calculated from the energy equation. Noting that the velocities are zero at the extremities of the system, an average velocity to each segment is calculated, and this average velocity is positive in each segment. The “delta” time spent by the system in each segment is now calculated by dividing the segment length by the average velocity of that segment. (From, time = displacement/velocity). The linear sum of such “delta” times gives the time period of oscillation. As the number of segments is increased, thereby reducing the segment length, the estimate becomes increasingly accurate. The proposed approach avoids a direct integration of complex, and often singular expressions that complicate the determination of time periods of oscillations of non-linear systems.
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Yao, Yina, Shuai Meng, Cong Li, Xiantao Chen, and Rui Yang. "Droplet Oscillation After Impact on a Solid Surface." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-66025.

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Droplet spreading and oscillation occur when a liquid droplet impacts on the solid surfaces. This process is vital in many industrial applications, such as ink-jet printing technologies, spray coating and agricultural spray deposition. However, the researches that have been done mainly focused on the spreading process, and less attention has been paid to the droplet oscillation phenomenon, which has influence on the solidification and evaporation process. Therefore, the study on droplet oscillation phenomenon after the impact is necessary and valuable. This paper aims at analyzing the droplet oscillation phenomenon using VOF method. Since the contact angle varies dramatically in the dynamic process, a dynamic contact angle model is introduced to improve the simulation accuracy. The dynamic contact angle model has been verified by comparing the numerical results with experimental and theoretical results. In order to study the factors that may influence the droplet oscillation period, different droplet diameters and impact velocities are utilized in this simulation. The results show that the oscillation period presents a positive relationship with droplet diameter. However, the impact velocity has no apparent influence on the oscillation period, which agrees well with the theoretical analysis.
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Dong, Q., Q. M. Li, and J. Y. Zheng. "Interactions Between Blast Loading and Dynamic Elastic Response of Containment Vessels." In ASME 2007 Pressure Vessels and Piping Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/pvp2007-26391.

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The interactions between internal blast loading and dynamic elastic response of a containment vessel are studied in this paper. The blast loading history is proposed to be divided into three periods, i.e. the primary-shock period, the shock-reflection period and the pressure-oscillation period. It is shown that the initial response of the containment vessel is determined by the peak overpressure and duration of the primary-shock. However, during the shock-reflection period, the response of the containment vessel may be influenced by the shock reflection in the vessel, especially when the dominant frequency of the shock reflection is close to the dominant response frequency of the vessel, and the reflected shock pressure is coupled with the vessel response. During the pressure-oscillation period, the dynamic loading is mainly the oscillation of the internal pressure due to the oscillatory volume change of the vessel, which couples dissipatedly with the vibration of the vessel leading to reduced vibration amplitudes. These fundamental features in the elastic response of containment vessels are demonstrated through an elastic circular ring (or an infinite-length cylindrical shell), which are applicable to other containment vessels.
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Usechak, Nicholas G. "Utility of the period-one oscillation state in injection-locked semiconductor lasers." In 2014 IEEE Avionics, Fiber-Optics and Photonics Technology Conference (AVFOP). IEEE, 2014. http://dx.doi.org/10.1109/avfop.2014.6999464.

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YOSHIOKA, HIROSHI, TOMOTSUKA TAKAYAMA, and SHIGEATSU SERIZAWA. "OBSERVATION AND COMPUTATION OF RESONANT LONG PERIOD OSCILLATION EXCITED BY STRONG WIND." In Proceedings of the 29th International Conference. World Scientific Publishing Company, 2005. http://dx.doi.org/10.1142/9789812701916_0102.

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Furuya, Masahiro, Yoshihisa Nishi, and Nobuyuki Ueda. "Validation of TRACE Code for Flashing-Induced Density Wave Oscillations in SIRIUS-N Facility, Which Simulates ESBWR." In 2012 20th International Conference on Nuclear Engineering and the ASME 2012 Power Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/icone20-power2012-55132.

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The TRACE code was validated against the flashing-induced density wave oscillation in the SIRIUS-N facility at low pressure (from 0.1 to 0.5 MPa) as a part of the international CAMP-Program of USNRC. The SIRIUS-N facility is a scaled copy of natural circulation BWR (ESBWR). Stability map of TRACE agrees with that of SIRIUS-N facility at low subcooling region, though instability observed in the lower heat flux and higher subcooling region from the stability limit of experiment. The TRACE code demonstrates the flashing-induced density wave oscillation characteristics: The oscillation period correlates well with the transit time of single-phase liquid in the chimney regardless of the system pressure, inlet subcooling, and heat flux. Unlike Type-I and II density wave oscillations, the inlet or exit throttling does not affect stability boundary and oscillation amplitude of flashing-induced density wave oscillations significantly. Increasing pressure decreases oscillation amplitude. The comprehensive validation confirms that the TRACE code can demonstrate thermal-hydraulic stability of natural circulation BWRs.
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Reports on the topic "Oscillation period"

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Murray, B. T., G. B. McFadden, and S. R. Coriell. Stabilization of Taylor-Couette flow due to time-periodic outer cylinder oscillation. Gaithersburg, MD: National Institute of Standards and Technology, 1990. http://dx.doi.org/10.6028/nist.ir.90-4283.

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