scholarly journals Pulse dynamics in an unstable medium

10.2172/96914 ◽  
1995 ◽  
Author(s):  
N.J. Balmforth ◽  
G.R. Ierley ◽  
R. Worthing
Keyword(s):  
Pulse Dynamics ◽  
Unstable Medium

scholarly journals Pulse Dynamics in an Unstable Medium

1997 ◽  
Vol 57 (1) ◽  
pp. 205-251 ◽  
Author(s):  
G. R. Ierley ◽  
N. J. Balmforth ◽  
R. Worthing
Keyword(s):  
Pulse Dynamics ◽  
Unstable Medium

scholarly journals Optical pulse dynamics in active metamaterials with positive and negative refractive index

2013 ◽  
Vol 30 (4) ◽  
pp. 1077 ◽  
Author(s):  
Alexander O. Korotkevich ◽  
Kathryn E. Rasmussen ◽  
Gregor Kovačič ◽  
Victor Roytburd ◽  
Andrei I. Maimistov ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Pulse ◽  
Negative Refractive Index ◽  
Pulse Dynamics ◽  
Active Metamaterials

scholarly journals Formation of Prestellar Cores via Non-Isothermal Gas Fragmentation

2015 ◽  
Vol 32 ◽  
Author(s):  
S. Anathpindika
Keyword(s):  
Gravitational Instability ◽  
Gas Flows ◽  
Smooth Particle Hydrodynamics ◽  
Three Phase ◽  
Prestellar Cores ◽  
Particle Hydrodynamics ◽  
Unstable Medium ◽  
Stage Process ◽  
Isothermal Gas ◽  
Gas Accretion

AbstractSheet-like clouds are common in turbulent gas and perhaps form via collisions between turbulent gas flows. Having examined the evolution of an isothermal shocked slab in an earlier contribution, in this work we follow the evolution of a sheet-like cloud confined by (thermal) pressure and gas in it is allowed to cool. The extant purpose of this endeavour is to study the early phases of core-formation. The observed evolution of this cloud supports the conjecture that molecular clouds themselves are three-phase media (comprising viz. a stable cold and warm medium, and a third thermally unstable medium), though it appears, clouds may evolve in this manner irrespective of whether they are gravitationally bound. We report, this sheet fragments initially due to the growth of the thermal instability (TI) and some fragments are elongated, filament-like. Subsequently, relatively large fragments become gravitationally unstable and sub-fragment into smaller cores. The formation of cores appears to be a three stage process: first, growth of the TI leads to rapid fragmentation of the slab; second, relatively small fragments acquire mass via gas-accretion and/or merger and third, sufficiently massive fragments become susceptible to the gravitational instability and sub-fragment to form smaller cores. We investigate typical properties of clumps (and smaller cores) resulting from this fragmentation process. Findings of this work support the suggestion that the weak velocity field usually observed in dense clumps and smaller cores is likely seeded by the growth of dynamic instabilities. Simulations were performed using the smooth particle hydrodynamics algorithm.

scholarly journals Pulse dynamics in carbon nanotube mode-locked fiber lasers near zero cavity dispersion

2015 ◽  
Vol 23 (8) ◽  
pp. 9947 ◽  
Author(s):  
Jinzhang Wang ◽  
Zhiping Cai ◽  
Ping Xu ◽  
Geguo Du ◽  
Fengqiu Wang ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Fiber Lasers ◽  
Pulse Dynamics

scholarly journals Noise and Pulse Dynamics in Backward Stimulated Brillouin Scattering

2020 ◽  
Author(s):  
Oscar Nieves ◽  
Matthew Arnold ◽  
Michael Steel ◽  
Mikolaj Schmidt ◽  
Chris Poulton
Keyword(s):  
Brillouin Scattering ◽  
Stimulated Brillouin Scattering ◽  
Pulse Dynamics ◽  
Stimulated Brillouin

Pulse dynamics controlled by saturable absorber in a dispersion-managed normal dispersion Tm-doped mode-locked fiber laser

2014 ◽  
Vol 12 (3) ◽  
pp. 031405-31408 ◽  
Author(s):  
Xiaoliang Yang Xiaoliang Yang ◽  
Yu Chen Yu Chen ◽  
Chujun Zhao Chujun Zhao ◽  
Han Zhang Han Zhang
Keyword(s):  
Fiber Laser ◽  
Saturable Absorber ◽  
Normal Dispersion ◽  
Pulse Dynamics

An experimental link between fast noseleaf deformations and biosonar pulse dynamics in hipposiderid bats

2020 ◽  
Vol 148 (2) ◽  
pp. 954-961 ◽  
Author(s):  
Liujun Zhang ◽  
Luhui Yang ◽  
Ru Zhang ◽  
Rolf Müller
Keyword(s):  
Pulse Dynamics
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