Searched for: subject:"Instability"
(1 - 20 of 20)
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Buijze, L. (author), Guo, Y. (author), Niemeijer, A.R. (author), Ma, S. (author), Spiers, C.J. (author)
Geodetic observations and large‐scale laboratory experiments show that seismic instability is preceded by slow slip within a finite nucleation zone. In laboratory experiments rupture nucleation is studied mostly using bare (rock) interfaces, whereas upper crustal faults are typically filled with gouge. To investigate effects of gouge on rupture...
article 2020
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van den Brand, H. (author), Bongers, W.A. (author), Stober, J.K. (author), Kasparek, W. (author), Wagner, D. (author), Doelman, N.J. (author), Klop, W.A. (author), Giannone, L. (author), Reich, M. (author), Westerhof, E. (author), de Baar, M.R. (author)
The successful use of a tokamak for generating fusion power requires an active control of magnetic instabilities, such as neoclassical tearing modes (NTMs). Commonly, the NTM location is determined using electron cyclotron emission (ECE) and this is used to apply electron cyclotron heating (ECH) on the NTM location. In this paper, an inline ECE...
article 2019
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Ruiz-Armenteros, A.M. (author), Lazecky, M. (author), Ruiz-Constan, A. (author), Bakon, M. (author), Delgado, J. Manuel (author), Sousa, J.J. (author), Galindo-Zaldivar, J. (author), de Galdeano, C.S. (author), Caro-Cuenca, M. (author), Martos-Rosillo, S. (author), Jimenez-Gavilan, P. (author), Perissin, D. (author)
In this paper we analyze the subsidence behavior of a coastal area in the province of Malaga (Costa del Sol), southern Spain, in the period 1992-2018 using C-band SAR interferometry. The area comprises several zones of interest where continuous deformation has happened during the analyzed period. Using SAR data from ESA's ERS-1/2, Envisat, and...
conference paper 2018
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Perdahcioglu, E.S. (author), Hou, B. (author), van den Boogaard, A.H. (author)
This research focuses on the prediction of the forming limit of certain Advanced High Strength Steel grades under stretch-bending conditions. For these types of steels it is experimentally observed and shown that when there is a bending component added to the main membrane deformation the formability predicted by the regular FLCs underestimate...
conference paper 2015
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Bos, J.E. (author), Ledegang, W.D. (author), Lubeck, A.J.A. (author), Stins, J.F. (author)
Motion sickness symptoms and increased postural instability induced by motion pictures have been reported in a laboratory, but not in a real cinema. We, therefore, carried out an observational study recording sickness severity and postural instability in 19 subjects before, immediately and 45 min after watching a 1 h 3D aviation documentary in a...
article 2013
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Bos, J.E. (author)
The most cited theory on motion sickness is the conflict theory by Reason and Brand (1975) [1], stating that motion sickness occurs due to a conflict between the senses and stored patterns of motion. In addition, there seems to be evidence for another theory stating that postural instability is a necessary and sufficient condition preceding...
article 2011
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de Baar, M.R. (author), Bongers, W.A. (author), van Berkel, M. (author), Doelman, N.J. (author), Hennen, B.A. (author), Nuij, P. (author), Oosterbeek, J.W. (author), Steinbuch, M. (author), Westerhof, E. (author), Witvoet, G. (author)
Resistive magneto-hydrodynamic instabilities are expected to limit the performance of nuclear fusion reactors. Prime examples are the sawtooth instability and the neoclassical tearing modes. The sawtooth instability will affect the refueling of the plasma core and the fast particle concentration. In reactor relevant conditions, the sawtooth can...
conference paper 2011
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Voigt, D. (author), Ellis, J.D. (author), Verlaan, A.L. (author), Bergmans, R.H. (author), Spronck, J.W. (author), Munnig Schmidt, R.H. (author)
The accuracy of high-end industrial equipment and the reliability of produced goods can be limited by dimensional drift phenomena. Examples are the life cycle stability of instrumentation for space missions and the tight requirements for measurement uncertainty in the integrated circuit semiconductor industry. Re-calibration intervals of...
conference paper 2011
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Green, K. (author), Wagenknecht, T. (author), TNO Bouw en Ondergrond (author)
This paper deals with the computation of pseudospectra of neutral delay differential equations (NDDEs) with fixed finite delays. This method provides information on the sensitivity of eigenvalues of the system under perturbations of a given size, allowing one to analyse uncertainties in, for example, structural dynamical systems. Furthermore,...
article 2010
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Colin de Verdière, A. (author), te Raa, L. (author), TNO Defensie en Veiligheid (author)
The stability of the thermohaline circulation of modern and glacial climates is compared with the help of a two dimensional ocean-atmosphere-sea ice coupled model. It turns out to be more unstable as less freshwater forcing is required to induce a polar halocline catastrophy in glacial climates. The large insulation of the ocean by the extensive...
article 2010
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Witvoet, G. (author), Steinbuch, M. (author), Westerhof, E. (author), Doelman, N.J. (author), de Baar, M.R. (author)
In nuclear fusion the sawtooth instability is an important plasma phenomenon, having both positive and negative effects on the tokamak plasma. Control of its period is essential in future nuclear fusion reactors. This paper presents a control oriented model of the sawtooth instability, with current drive as input and sawtooth period as output,...
conference paper 2010
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Frost-Christensen, L.N. (author), Mastbergen, S.C. (author), Vianen, M.E. (author), Hartog, A. (author), de Groot, J. (author), Voorhout, G. (author), van Wees, A.M.C. (author), Lafeber, F.P.J.G. (author), Hazewinkel, H.A.W. (author), TNO Kwaliteit van Leven (author)
Objective: The most used model for joint instability is the canine anterior cruciate ligament transection (ACLT)-model. The ACLT-model can be extended with a medial meniscectomy (MX) (i.e., ACLT-MX-model) to avoid unintentional, and with that variable, meniscal damage. The present study compares the ACLT-MX-model with the more recently...
article 2008
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de Vogel, S. (author), Bongaerts, B.W.C. (author), Wouters, K.A.D. (author), Kester, A.D.M. (author), Schouten, L.J. (author), de Goeij, A.F.P.M. (author), de Bruïne, A.P. (author), Goldbohm, R.A. (author), van den Brandt, P.A. (author), van Engeland, M. (author), Weijenberg, M.P. (author), TNO Kwaliteit van Leven (author)
Intake of dietary factors that serve as methyl group donors may influence promoter hypermethylation in colorectal carcinogenesis. We investigated whether dietary folate, vitamin B2 and vitamin B6, methionine and alcohol were associated with mutL homologue 1 (MLH1) hypermethylation and the related molecular phenotypes of MLH1 protein expression,...
article 2008
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TNO Kwaliteit van Leven (author), Bongaerts, B.W.C. (author), de Goeij, A.F.P.M. (author), de Vogel, S. (author), van den Brandt, P.A. (author), Goldbohm, R.A. (author), Weijenberg, M.P. (author)
High alcohol consumption is related to colorectal cancer (CRC). Our objective was to study associations between alcohol consumption and risk of CRC according to characteristics of aetiological pathways: the chromosomal instability (CIN) and the microsatellite instability (MIN) pathway. We classified CIN+ tumours (tumours with either a truncating...
article 2007
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Ljevar, S. (author), Smeulers, J.P.M. (author), de Lange, H.C. (author), van Steenhoven, A.A. (author), TNO Industrie en Techniek (author)
Since rotating stall in centrifugal compressors limits the operating range more knowledge on flow dynamics of rotating stall mechanism is required. To study the vaneless diffuser rotating stall a two-dimensional flow model is used in which the influence of the wall boundary layers is neglected. At the diffuser inlet rotating jet-wake velocity is...
conference paper 2006
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Ljevar, S. (author), de Lange, H.C. (author), van Steenhoven, A.A. (author), TNO Industrie en Techniek (author)
We report a numerical study on the vaneless diffuser core flow instability in centrifugal compressors. The analysis is performed for the purpose of better understanding of the rotating stall flow mechanism in radial vaneless diffusers. Since the analysis is restricted to the two-dimensional core flow, the effect of the wall boundary layers is...
article 2006
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Michielse, C.B. (author), Salim, K. (author), Ragas, P. (author), Ram, A.F.J. (author), Kudla, B. (author), Jarry, B. (author), Punt, P.J. (author), van den Hondel, C.A.M.J.J. (author), TNO Voeding (author)
Two transformation systems, based on the use of CaCl2/PEG and Agrobacterium tumefaciens, respectively, were developed for the zygomycete Rhizopus oryzae. Irrespective of the selection marker used, a pyr4 marker derived from R. niveus or a dominant amdS+ marker from Aspergillus nidulans, and irrespective of the configuration of the transforming...
article 2004
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Carton, E.P. (author), Prins Maurits Laboratorium TNO (author)
Experimental results of wavy metal interfaces obtained by explosive welding are presented and used to determine which wave forming mechanism occurred. It was found that for small collision angles (smaller than about 20°) the Von Karman or jet indentation mechanism occurs, while for large collision angles a straight metal interface is obtained....
conference paper 2004
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Killestein, J. (author), Hoogervorst, E.L.J. (author), Reif, M. (author), Blauw, B. (author), Smits, M. (author), Uitdehaag, B.M.J. (author), Nagelkerken, L. (author), Polman, C.H. (author), TNO Preventie en Gezondheid (author)
Cannabinoids can modulate the function of immune cells. We here present the first human in vivo study measuring immune function in 16 MS patients treated with oral cannabinoids. A modest increase of TNF-α in LPS-stimulated whole blood was found during cannabis plant-extract treatment (p=0.037), with no change in other cytokines. In the subgroup...
article 2003
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Swift, R.J. (author), Karandikar, A. (author), Griffen, A.M. (author), Punt, P.J. (author), van den Hondel, C.A.M.J.J. (author), Robson, G.D. (author), Trinci, A.P.J. (author), Wiebe, M.G. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)
Aspergillus niger B1, a recombinant strain carrying 20 extra copies of the native glucoamylase gene, was grown in glucose-limited chemostat cultures supplemented with various organic nitrogen sources (dilution rate 0.12 ± 0.01 h-1, pH 5.4). In cultures supplemented with L-alanine, L-methionine, casamino acids, or peptone, specific glucoamylase ...
article 2000
Searched for: subject:"Instability"
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