Searched for: subject:"Velocity"
(1 - 20 of 140)

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Bruch, W.· (author), Piazzola, J. (author), Branger, H. (author), van · Eijk, A.M.J. (author), Luneau, C. (author), Bourras, D. (author), Tedeschi, G. (author)
We investigate the effects of wind–wave interactions on the surface sea-spray-generation flux. To this end, the Marine Aerosol Tunnel Experiment (MATE2019) was conducted at the Pytheas Institute large wave–wind facility in Luminy (Marseille, France) over the period June–July 2019. A unique range of air–sea boundary conditions was generated by...
article 2021
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Massaad, J. (author), van Neer, P.L.M.J. (author), van Willigen, D.M. (author), Sabbadini, A. (author), de Jong, N. (author), Pertijs, M.A.P. (author), Verweij, M.D. (author)
Current ultrasonic clamp-on flow meters consist of a pair of single-element transducers which are carefully positioned before use. This positioning process consists of manually finding the distance between the transducer elements, along the pipe axis, for which maximum SNR is achieved. This distance depends on the sound speed, thickness and...
article 2021
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Buijze, L. (author), Guo, Y. (author), Niemeijer, A.R. (author), Ma, S. (author), Spiers, C.J. (author)
Frictional heterogeneity within fault zones is one of the factors proposed to explain the spectrum of slow, intermediate, and fast slip behaviors exhibited by faults in nature. Numerical modeling shows how even a simplified model setup incorporating sliding on a velocity-weakening (VW) patch surrounded by velocity-strengthening (VS) material can...
article 2021
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Martins, J.E. (author), Weemstra, C. (author), Ruigrok, E. (author), Verdel, A. (author), Jousset, P. (author), Hersir, G.P. (author)
Tomographic imaging based on ambient seismic noise measurements has shown to be a powerful tool, especially in areas like Iceland, where the microseism illumination is excellent. In this paper, we produce a 3D S-wave tomographic image over the western Reykjanes Peninsula high-enthalpy geothermal fields and evaluate the reliability of the...
article 2019
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li Piani, T. (author), Weerheijm, J. (author), Sluys, L.J. (author)
article 2019
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Verdel, A. (author), van Haeringen, D. (author), Vandeweijer, V. (author), Carpentier, S. (author), Meekes, S. (author)
We demonstrate in this geothermal exploration case study performed in The Netherlands that ambient noise seismic interferometry (ANSI) can be an effective and efficient method for obtaining surface wave dispersion curves, leading to shallow shear-wave velocity-depth profiles that can improve imaging of deep structures. As the ANSI method...
conference paper 2019
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Jin, J. (author), Lin, H.X. (author), Heemink, A. (author), Segers, A. (author)
In previous studies, a number of model-based dust forecasts and early warning systems have been developed for the prevention of environmental impacts due to dusts. However, the accuracy of the model is limited by imperfect identification of dust emissions, in particular by the friction velocity threshold parameterization in the emission process....
article 2018
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van Neer, P.L.M.J. (author), Stelwagen, U. (author), Geers, L.F.G. (author), Piras, D. (author), Corominas, F. (author), Grosso, M. (author), Giling, E.J.M. (author)
The number of chemical processes transferred from a batch-wise approach to continuous flow is increasing, due
conference paper 2018
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Paap, B. (author), Kraaijpoel, D. (author), Bakker, M. (author), Gharti, H.N. (author)
Gas extraction from the Groningen natural gas field, situated in the Netherlands, frequently induces earthquakes in the reservoir that cause damage to buildings, and pose a safety hazard and a nuisance to the local population. Due to the dependence of the national heating infrastructure on Groningen gas, the short-term mitigation measures are...
article 2018
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Roubos, A. (author), Peters, D.J. (author), Groenewegen, L. (author), Steenbergen, R.D.J.M. (author)
Design methods for marine structures have evolved into load and resistance factor design, however existing partial safety factors related to berthing velocity and loads have not been verified and validated by measurement campaigns. In this study, field observations of modern seagoing vessels berthing in Bremerhaven, Rotterdam and Wilhelmshaven...
article 2018
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Magneron, C. (author), Doornenbal, H. (author), van Bever, I. (author), Botz, M. (author)
Regional velocity models are used mainly for time-to-depth conversion. At regional scales, where few horizons are available, the accuracy and consistency of the velocity models relies on the integration of seismic velocities which bring additional information in terms of lateral and vertical heterogeneities. Such heterogeneities can only be...
conference paper 2018
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Demčenko, A. (author), Wilson, R. (author), Cooper, J.M. (author), Mazilu, M. (author), Volker, A.W.F. (author)
This paper shows that acoustoelasticity in one-dimensional (1D) multilayered isotropic hyperelastic materials can be understood through the analysis of elastic wave velocities as a function of applied stress. This theoretical framework is used for eigenvalue analyses in stressed elastic structures through a reformulation of the stiffness matrix...
article 2018
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Fonseca, A.S. (author), Kuijpers, E. (author), Kling, K.I. (author), Levin, M. (author), Koivisto, A.J. (author), Nielsen, S.H. (author), Fransman, W. (author), Fedutik, Y. (author), Jensen, K.A. (author), Koponen, I.K. (author)
Fume hoods are one of the most common types of equipment applied to reduce the potential of particle exposure in laboratory environments. A number of previous studies have shown particle release during work with nanomaterials under fume hoods. Here, we assessed laboratory workers’ inhalation exposure during synthesis and handling of CuO, TiO2...
article 2018
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Ding, D. (author), Neerincx, M.A. (author), Brinkman, W.P. (author)
Introduction: Inner voice is estimated to occur at least a quarter of people’s conscious waking life. Much research work asserts that inner voice plays various important roles in cognitive functions, such as self-regulation, self-reflection, and so on. Virtual cognitions are a stream of simulated thoughts people can hear while emerged in a...
article 2018
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Worum, G. (author), van Wees, J.D. (author)
A workflow is presented to determine the detailed, high-resolution pattern of erosion in maturely explored Sedimentary Basins by analysing the sonic log-based interval velocity patterns of nine stratigraphic intervals complemented by a geometrical approach involving the extrapolation of 3-D seismic reflectors. The jointly evaluated results of...
article 2017
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van Binsbergen, S.A. (author), van Zelderen, B. (author), Veraar, R.G. (author), Bouquet, F. (author), Halswijk, W.H.C. (author), Schleijpen, H.M.A. (author)
In performance prediction of IR sensor systems for missile detection, apart from the sensor specifications, target signatures are essential variables. Very often, for velocities up to Mach 2-2.5, a simple model based on the aerodynamic heating of a perfect gas was used to calculate the temperatures of missile targets. This typically results in...
conference paper 2017
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Buijze, L. (author), Niemeijer, A.R. (author), Han, R. (author), Shimamoto, T. (author), Spiers, C.J. (author)
The evolution of friction as a function of slip rate is important in understanding earthquake nucleation and propagation. Many laboratory experiments investigating friction of fault rocks are either conducted in the low velocity regime (10−8–10−4 ms−1) or in the high velocity regime (0.01–1 m s−1). Here, we report on the evolution of friction...
article 2017
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Zegers, J.C. (author), Semsar Kazerooni, E. (author), Ploeg, J. (author), van de Wouw, N. (author), Nijmeijer, H. (author)
In this paper, a distributed consensus control approach for vehicular platooning systems is proposed. In formalizing the underlying consensus problem, a realistic vehicle dynamics model is considered and a velocity-dependent spacing policy between two consecutive vehicles is realized. As a particular case, the approach allows to consider...
article 2017
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van Nunen, E. (author), Esposto, F. (author), Saberi, A.K. (author), Paardekooper, J.P. (author)
This paper addresses safety indicators for truck platooning at short inter-vehicle distances (with a time gap of 0.5 s). The aim of a safety indicator is to determine the correct moment for initiating a Collision Avoidance brake action to prevent a collision with the preceding truck in threatening situations. Three safety indicators are selected...
conference paper 2017
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Kruiver, P.P. (author), van Dedem, E. (author), Romijn, R. (author), de Lange, G. (author), Korff, M. (author), Stafleu, J. (author), Gunnink, J.L. (author), Rodriguez-Marek, A. (author), Bommer, J.J. (author), van Elk, J. (author), Doornhof, D. (author)
A regional shear-wave velocity (VS) model has been developed for the Groningen gas field in the Netherlands as the basis for seismic microzonation of an area of more than 1000 km2. The VS model, extending to a depth of almost 1 km, is an essential input to the modelling of hazard and risk due to induced earthquakes in the region. The detailed VS...
article 2017
Searched for: subject:"Velocity"
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