- document
-
Bekdemir, C. (author), Doosje, E. (author), Seykens, X. (author)At present, the hydrogen combustion engine has gained renewed interest from the heavy-duty internal combustion engine (ICE) industry as an enabler for fast decarbonization of well-to-wheel emissions and reinforced by the vast commitment of key stakeholders to establish a green hydrogen infrastructure. Past studies have often focused on partial...conference paper 2022
- document
-
Barciela-Rial, M. (author), Vardon, P.J. (author), van Kessel, T. (author), Griffioen, J. (author), Winterwerp, J.C. (author)Progressively, more dredged sediments are being reused for engineering projects. For example, the Marker Wadden is a new wetland constructed in lake Markermeer, the Netherlands, with dredged cohesive sediments originating from the bed of the lake. Such dredged sediments are often dominated by cohesive sediment particles with varying amounts of...article 2022
- document
-
Wezeman, R.S. (author), Chiscop, I. (author), Anitori, L. (author), van Rossum, W.L. (author)Compressive sensing is a signal processing technique used to acquire and reconstruct sparse signals using significantly fewer measurement samples. Compressive sensing requires finding the most sparse solution to an underdetermined linear system, which is an NP-hard problem and as a consequence in practise is only solved approximately. In our...conference paper 2022
- document
-
de Gijsel, S.L. (author), Vijn, A.R.P.J. (author), Tan, R.G. (author)This paper proposes an algorithm to localize a magnetic dipole using a limited number of noisy measurements from magnetic field sensors. The algorithm is based on the theory of compressed sensing, and exploits the sparseness of the magnetic dipole in space. Beforehand, a basis consisting of magnetic dipole fields belonging to individual dipoles...article 2022
- document
-
Attema, T. (author), Cramer, R. (author), Kohl, L. (author)We show a lattice-based solution for commit-and-prove transparent circuit zero-knowledge (ZK) with polylog-communication, the first not depending on PCPs. We start from compressed Σ-protocol theory (CRYPTO 2020), which is built around basic Σ-protocols for opening an arbitrary linear form on a long secret vector that is compactly committed to....conference paper 2021
- document
-
Atanasov, A.N. (author), Ahmad, W.H.R.A.M. (author), Alink, M.S.O. (author), van Vliet, F.E. (author)We propose a fast and simple method to accurately determine the compressing stage in a two-stage amplifier system based on reverse intermodulation and hot S-parameter measurements. The method uses no specialized hardware and needs little reconfiguration, simplifying the measurements. We demonstrate its validity over a broad range of amplifiers...conference paper 2021
- document
-
de Martin, L. (author), van Rossum, W. (author), Ribeiro, D. (author), Anitori, L. (author)It is well known that noise-like waveforms have the inherent property of suppressing ambiguities due to their nonrepetitive nature, as opposed to the more classical linear frequency modulated (LFM) pulsed waveforms. This aperiodicity also improves the robustness against jammers, making these waveforms harder to detect and classify by an enemy....article 2020
- document
-
Willems, R. (author), Willems, F. (author), Simpson, T. (author), Albrecht, B. (author), Deen, N. (author), Somers, B. (author)CO2 regulations on heavy-duty transport are introduced in essentially all markets within the next decade, in most cases in several phases of increasing stringency. To cope with these mandates, developers of engines and related equipment are aiming to break new ground in the fields of combustion, fuel and hardware technologies. In this work, a...conference paper 2020
- document
-
Lejeail, M. (author), Fischer, H.R. (author)Stimulated by the growing demand for more sustainable polymers, explorative experiments were performed to substitute oil-based components by “green” monomers derived from bio-based compounds to decrease the carbon footprint of the production of such thermosets. The potential of itaconimides synthesised from itaconic anhydride e.g. obtained by...article 2020
- document
-
Koopman, A.S. (author), Kingma, I. (author), de Looze, M.P. (author), van Dieën, J.H. (author)Low-back pain is the number one cause of disability in the world, with mechanical loading as one of the major risk factors. Exoskeletons have been introduced in the workplace to reduce low back loading. During static forward bending, exoskeletons have been shown to reduce back muscle activity by 10% to 40%. However, effects during dynamic...article 2020
- document
-
Seykens, X. (author), Bekdemir, C. (author), Han, J. (author), Willems, R. (author), van Hal, J. (author)This paper focusses on the application of bioalcohols (ethanol and butanol) derived from seaweed in Heavy-Duty (HD) Compression Ignition (CI) combustion engines. Seaweed-based fuels do not claim land and are not in competition with the food chain. Currently, the application of high octane bioalcohols is limited to Spark Ignition (SI) engines....conference paper 2020
- document
-
Koopman, A.S. (author), Naf, M. (author), Baltrusch, S.J. (author), Kingma, I. (author), Rodriguez-Guerrero, C. (author), Babic, J. (author), de Looze, M.P. (author), van Dieën, J.H. (author)The number one cause of disability in the world is low-back pain, with mechanical loading as one of the major risk factors. To reduce mechanical loading, exoskeletons have been introduced in the workplace. Substantial reductions in back muscle activity were found when using the exoskeleton during static bending and manual materials handling....article 2020
- document
-
Thomas, E. (author), Gabriel, A. (author), el Assal, K.M. (author)In traditional video decoding applications, the number of elementary streams that a hardware decoding platform of an end device can decode is determined at runtime by the. Upon request by the application, the decoding platform verifies whether a new decoding instance with an associated requirement in terms of data rate can fit under the current...conference paper 2020
- document
-
Willems, F. (author), Kupper, F. (author), Ramesh, S. (author), Indrajuana, A. (author), Doosje, E. (author)Reactivity Controlled Compression Ignition (RCCI) combines very high thermal efficiencies with ultra-low engine out NO x and PM emissions. Moreover, it enables the use of a wide range of fuels. As this pre-mixed combustion concept relies on controlled auto-ignition, closed-loop combustion control is essential to guarantee safe and stable...conference paper 2019
- document
-
Koopman, A.S. (author), Toxiri, S. (author), Power, V. (author), Kingma, I. (author), van Dieën, J.H. (author), Ortiz, J. (author), de Looze, M.P. (author)With mechanical loading as the main risk factor for LBP, exoskeletons (EXO)are designed to reduce the load on the back by taking over part of the moment normally generated by back muscles. The present study investigated the effect of an active exoskeleton, controlled using three different control modes (INCLINATION, EMG & HYBRID), on spinal...article 2019
- document
-
Simons, E.C. (author), Weerheijm, J. (author), Sluys, L.J. (author)Alumina ceramic is often used in armour systems. This material is known to have a brittle response under tensile loading, while a ductile response is found when sufficiently high pressures are reached. During projectile impact a ceramic material experiences both tensile loading and high pressures, hence fails in both a brittle and ductile way....article 2019
- document
-
Xia, L. (author), Willems, R. (author), Jager, B.D. (author), Willems, F. (author)Fuel efficiency optimization and emission reduction have become essential parts of engine research, due to the growing demand for environmental protection. In this paper, a computationally efficient optimization method has been applied to maximize the fuel efficiency under constraints of maximum pressure rise rate and various pollutant emissions...conference paper 2019
- document
-
Hansen, S.G. (author), Meinen, N.E. (author), Jørgensen, H.B. (author)Assessment of the load‐carrying capacity of existing concrete structures is often based on the concrete compressive strength obtained from drilled cores. These cores are typically drilled perpendicular to the concrete surface, under the assumption that the mechanical properties of the concrete are isotropic. Recent studies however showed that...conference paper 2019
- document
-
Reinders, J.E.A. (author), Velthuis, J.F.M. (author), Spruijt, M.P.N. (author)Damage caused by incidents with transport tanks with compressed liquified gas is amongst the most extreme that can be encountered with transport vessels. This is particularly the case with the Boiling Liquid Expanding Vapor Explosion (BLEVE), which may occur if such a tank is exposed to fire for a prolonged period. Therefore, the local Dutch LPG...article 2019
- document
-
Li Piani, T. (author), Weerheijm, J. (author), Koene, L. (author), Sluys, L.J. (author)A local damage model is proposed for the numerical assessment of the static performance of Adobe masonry components. The model was applied to simulate the experimental behaviour of sundried soil bricks and mud mortar tested in uniaxial compression and bending. Numerical simulations of the model are made mesh objective by means of a rate...article 2019