Searched for: subject:"Attenuation"
(1 - 20 of 26)

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Willemse, C.J.A.M. (author), van Erp, J.B.F. (author)
Social touch interactions can, depending on the type and strength of the dyadic social relationship, elicit a plethora of physiological, emotional, and behavioral responses; both beneficial and disadvantageous. With the intention to expand the communicative capabilities of humanoid social robots, we investigated whether robot-initiated touches...
article 2019
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Kachko, A. (author), van der Ham, L.V. (author), Bardow, A. (author), Vlugt, T.J.H. (author), Goetheer, E.L.V. (author)
Chemical absorption of CO2 using aqueous amine-based solvents is one of the common approaches to control acidic gases emissions to the atmosphere. Improvement in the efficiency of industrial processes requires precise monitoring tools that fit with the specific application. Process monitoring using in-line multivariate measurement methods...
article 2016
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Verreault, J. (author), van der Voort, M.M. (author)
Multi-layered materials with alternating impedances as a mean to mitigate sympathetic detonation is considered in this investigation by studying the wave scattering and energy absorption phenomena. This is achieved using an analytical wave-tracking model that accounts for the different wave interactions within and at the interface of each layer....
conference paper 2015
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Ya, W. (author), Hernández-Sánchez, J.F. (author), Pathiraj, B. (author), Huis in 't Veld, A.J. (author)
The effects of powder stream when using different feeding nozzles on the attenuation of the laser power were investigated theoretically and experimentally. The powder streams were recorded with a high speed camera. The average velocity of the particles was obtained using standard Particle Image Velocimetry (PIV) technique. These average...
conference paper 2013
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Wessels, P.W. (author), Basten, T.G.H. (author), van der Eerden, F.J.M. (author)
In this paper the approach for an acoustical model based monitoring network is demonstrated. This network is capable of reconstructing a noise map, based on the combination of measured sound levels and an acoustic model of the area. By pre-calculating the sound attenuation within the network the noise map can be shown in real-time. The...
conference paper 2010
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Dos Santos Ferreira, O. (author), Stevens, A. (author), Schrauwen, C. (author), TNO Industrie en Techniek (author)
A peel test device was used to monitor metal-polymer adhesion. This technique showed variations in the resulting force within 1%, and enabled the ranking of many systems. A change in the 50 nm-adhesion layer resulted in a variation of the fracture energy by a factor 2.3. A change of the substrate led to a change in adhesion by a factor 40. The...
article 2009
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TNO Defensie en Veiligheid (author), van Moll, C.A.M. (author), Ainslie, M.A. (author), van Vossen, R. (author)
In this communication, a new empirical formula for the absorption of sound in seawater is derived. The starting point of this investigation is the formula proposed by Ainslie and Mc- Colm for attenuation due to the boron and magnesium relaxations. Constants in the expression are treated as parameters to be determined. Since this is a nonlinear...
article 2009
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van Wanum, M. (author), van der Bent, G. (author), Rodenburg, M. (author), de Hek, A.P. (author), TNO Defensie en Veiligheid (author)
Robust digital control logic for a X-band fivebit digital attenuator and six-bit phase shifter has been developed and tested. The circuit uses an innovative combination of feedback and feed forward. The devices have been developed in the 6-inch 0.5 μm power pHEMT process (PP50-10) of WIN Semiconductors. The use of this process results in cost...
conference paper 2006
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de Jong, W. (author), Dam, F.A.M. (author), Kunz, G.J. (author), Schleijpen, H.M.A. (author), TNO Defensie en Veiligheid (author)
IR decoys can be an effective countermeasure against IR guided anti ship missiles. However, it's not so easy to determine how the decoys should be deployed to get maximum effectiveness. A limitation of trials is that results are obtained for the specific trial condition only. Software tools have been developed to solve these problems. One...
conference paper 2005
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Ainslie, M.A. (author), TNO Defensie en Veiligheid (author)
Long-range acoustic propagation in isothermal conditions is considered, involving multiple reflections from the sea surface. If the sea is calm there is almost perfect reflection and hence little loss of acoustic energy or coherence. The effect of wind is to increase propagation loss due to rough surface scattering and the interaction with near...
article 2005
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Bień, J.D. (author), ter Meer, J. (author), Rulkens, W.H. (author), Rijnaarts, H.H.M. (author), TNO Milieu, Energie en Procesinnovatie (author)
A Health Index/Risk Evaluation Tool (HIRET) has been developed for the integration of risk assessment and spatial planning using GIS capabilities. The method is meant to assist decision makers and site owners in the evaluation of potential human health risk with respect to land use. Human health risk defined as the potential adverse effects on...
article 2005
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Llombart, N. (author), Neto, A. (author), Gerini, G. (author), de Maagt, P. (author)
This paper deals with the design and the analysis of planar circularly symmetric (PCS) EBG structures. The analysis is concentrated on TM excitations. To obtain simple design rules for the PCS-EBG's, an equivalence is established between 2D-EBG's and PCS-EBG's. he dispersion equations are investigated first. The 2D problems are studied by means...
conference paper 2004
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Verhoef, P. (author), Steenge, G.R. (author), Boelsma, E. (author), van Vliet, T. (author), Olthof, M.R. (author), Katan, M.B. (author), TNO Voeding (author)
Background: A high plasma total homocysteine (tHcy) concentration is a risk factor for cardiovascular disease. The increase in tHcy induced by methionine, the sole dietary precursor of homocysteine, might be modulated by other amino acids present in dietary proteins. Objectives: Our objectives were to compare the postprandial effect of free and...
article 2004
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Crabtree, B. (author), Abel, S. (author), Dancer, A.L. (author), Buck, K. (author), Wessling, T. (author), Steeneker, H.J.M. (author), Verhave, J. (author), James, S.H. (author), Rood, G. (author), McKinley, R. (author)
Hearing protection with standard passive earmuffs is for many military applications insufficient. Low frequency noises (diesel engines, helicopter rotor) require increased attenuation. Active Noise Reduction (ANR) is specifically suited for reduction at low frequencies. Assessment of ANR for military applications is an important topic as the...
report 2004
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Vos, J. (author), TNO Technische Menskunde (author)
In a previous study on the annoyance caused by a great variety of shooting sounds [J. Acoust. Soc. Am. 109, 244-253 (2001)], it was shown that the annoyance, as rated indoors with the windows closed, could be adequately predicted from the outdoor A-weighted and C-weighted sound-exposure levels [ASEL (L(AE)) and CSEL (L(CE))] of the impulse...
article 2003
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Volkering, F. (author), Tonnaer, H. (author), Verschuur, E.M.C. (author), Langenhoff, A.A.M. (author), Heimovaara, T.J. (author), Barkhuis, R. (author), TNO Milieu, Energie en Procesinnovatie (author)
conference paper 2000
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Thole, J.E.R. (author), van Dalen, P.J. (author), Havenith, C.E.G. (author), Pouwels, P.H. (author), Seegers, J.F.M.L. (author), Tielen, F.D. (author), van der Zee, M.D. (author), Zegers, N.D. (author), Shaw, M. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)
By expression of foreign antigens in attenuated strains derived from bacterial pathogens and in non-pathogenic commensal bacteria, recombinant vaccines are being developed that aim to stimulate mucosal immunity. Recent advances in the pathogenesis and molecular biology of these bacteria have allowed rational development of new and improved...
article 2000
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Slenders, J.L.A. (author), Marinussen, M. (author), van der Ben, J. (author), van Vossen, W. (author), TNO Milieu, Energie en Procesinnovatie (author)
At this moment the results of an extensive set of soil and groundwater analyses of about 80 former Dutch landfills are being processed. The study not only has to produce an image of soil and groundwater quality in and around landfills, but also has to lead to a more solid estimate of aftercare measures at the 3800 former landfills in the...
conference paper 2000
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Slenders, J.L.A. (author), Borger, A.R. (author), Gerritse, J. (author), Langenhoff, A.A.M. (author), ter Meer, J. (author), Baartmans, R.F.W. (author), de Kreuk, H. (author), Verhaagen, P. (author), Theeuwen, J. (author), TNO Milieu, Energie en Procesinnovatie (author)
conference paper 2000
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ter Meer, J. (author), Gerritse, J. (author), di Mauro, C. (author), Harkes, M.P. (author), Rijnaarts, H.H.M. (author), TNO Milieu, Energie en Procesinnovatie (author)
The use of intrinsic degradation processes (natural attenuation) is becoming the basis for the restoration of many contaminated sites. Within this context, measuring concentrations of hydrogen in groundwater is important in two ways. Firstly, the hydrogen concentration can be used to characterize redox conditions. Secondly, hydrogen may be an...
conference paper 2000
Searched for: subject:"Attenuation"
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