Searched for: subject:"Ripples"
(1 - 9 of 9)
document
Pyrgiotis, N. (author), Malone, K.M. (author), Odoni, A. (author)
We describe an analytical queuing and network decomposition model developed to study the complex phenomenon of the propagation of delays within a large network of major airports. The Approximate Network Delays (AND) model computes the delays due to local congestion at individual airports and captures the " ripple effect" that leads to the...
article 2013
document
Scorticati, D. (author), Skolski, J.Z.P. (author), Römer, G.R.B.E. (author), Huis in 't Veld, A.J. (author), Workum, M. (author), Theelen, M.J. (author), Zeman, M. (author)
In this work, we studied the feasibility of surface texturing of thin molybdenum layers on a borosilicate glass substrate with Ultra-Short Laser Pulses (USLP). Large areas of regular diffraction gratings were produced consisting of Laserinduced periodic surface structures (LIPSS). A short pulsed laser source (230 fs-10 ps) was applied using a...
conference paper 2012
document
Vincenc Obona, J. (author), Ocelík, V. (author), Skolski, J.Z.P. (author), Mitko, V.S. (author), Römer, G.R.B.E. (author), Huis In't Veld, A.J. (author), de Hosson, J.T.M. (author)
This paper concentrates on observations of the surface topography by scanning electron microscopy (SEM) on alloyed and stainless steels samples treated by ultrashort laser pulses with duration of 210 fs and 6.7 ps. Globular-like and jet-like objects were found depending on the various levels of the fluence applied. It is shown that these...
article 2011
document
Hanyak, M. (author), Darhuber, A.A. (author), Ren, M. (author)
Due to its flexibility, inkjet printing has become a widespread technique for the non-contact deposition of liquids, solutions and melts on a variety of substrates with a lateral resolution down to about 10 μm. Because the patterns are formed via coalescence of many individual droplets, ripples and undulations can appear in the deposited layers,...
article 2011
document
Mitko, V.S. (author), Röer, G.R.B.E. (author), Huis in 't veld, A.J. (author), Skolski, J.Z.P. (author), Obona, J.V. (author), Ocelík, V. (author), de Hosson, J.T.M. (author)
The paper concentrates on surface texturing on sub-micro meter scale with ultra short laser pulses that has several applications, e.g. changing the hydrophilic/hydrophobic performance, optical or tribological properties of materials. In general, the formations of wavy structures, or ripples on a surface irradiated by short pulse lasers has been...
conference paper 2011
document
Huis in 't Veld, B. (author), van der Veer, H. (author), TNO Industrie en Techniek (author)
The physics of ablation has been studied experimentally with ultrashort laser pulses of 210 fs with a wavelength of 800 nm. A specimen of highly alloyed steel (alloy 800H) has been used. After the laser ablation experiments the surface has been inspected using SEM, AFM and scanning helium ion microscopy (SHIM). At the lowest fluence spherical...
article 2010
document
Skolski, J.Z.P. (author), Römer, G.R.B.E. (author), Huis in 't Veld, A.J. (author), Mitko, V.S. (author), Obona, J.V. (author), Ocelik, V. (author), de Hosson, J.T.M. (author), TNO Industrie en Techniek (author)
In surfaces irradiated by short laser pulses, Laser Induced Periodic Surface Structures (LIPSS) have been observed on all kind of materials for over forty years. These LIPSS, also referred to as ripples, consist of wavy surfaces with periodicity equal or smaller than the wavelength of the laser radiation. Unfortunately, the physical phenomena...
conference paper 2010
document
Huis in 't Veld, A.J. (author), Groenendijk, M.N.W. (author), Fischer, H.R. (author), TNO Industrie en Techniek (author)
The origin and growth of a self organizing rippled nanostructure have been studied on slightly etched high temperature steel using 240 fs laser pulses with a wavelength of 800 nm. SEM, AFM and confocal microscopy have been used for analyses. A relatively low energy input results in a regular structure with a wavelength in the range 300 - 500 nm...
conference paper 2008
document
Passchier, S. (author), Kleinhans, M.G. (author), TNO Bouw en Ondergrond (author)
[1] This paper aims to investigate the distribution and stability of large-scale bed forms in response to storm and fair-weather conditions in a shallow marine environment. Multibeam and side-scan sonar data off the Dutch coast (median grain size 0.25-0.35 mm) were collected to monitor sand waves (λ = 100-800 m) and superimposed megaripples (λ =...
article 2005
Searched for: subject:"Ripples"
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