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Pfeiffer, S.U. (author), de Wagter, C. (author), de Croon, G.C.H.E. (author)Moving Horizon Estimation (MHE) offers multiple advantages over Kalman Filters when it comes to the localization of drones. However, due to the high computational cost, they can not be used on Micro Air Vehicles (MAVs) with limited computational power. We have previously shown, that with a few assumptions and simplifications, MHE can be made...conference paper 2023
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van Natijne, A.L. (author), Bogaard, T.A. (author), Zieher, Thomas (author), Pfeiffer, Jan (author), Lindenbergh, R.C. (author)Landslides are one of the major weather-related geohazards. To assess their potential impact and design mitigation solutions, a detailed understanding of the slope processes is required. Landslide modelling is typically based on data-rich geomechanical models. Recently, machine learning has shown promising results in modelling a variety of...journal article 2023
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Pfeiffer, Jan (author), Zieher, Thomas (author), Schmieder, Jan (author), Bogaard, T.A. (author), Rutzinger, Martin (author), Spötl, Christoph (author)Continuous and slow-moving deep-seated landslides entail challenges for the effective planning of mitigation strategies aiming at the reduction of landslide movements. Given that the activity of most of these landslides is governed by pore pressure variations within the shear zone, profound knowledge about their hydrogeological control is...journal article 2022
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Deen, Aaron Doug (author), van Beusekom, Heleen M.M. (author), Pfeiffer, Tom (author), Stam, Mathijs (author), Kleijn, Dominique D.E. (author), Wentzel, Jolanda (author), Huber, Robert (author), van der Steen, A.F.W. (author), Van Soest, Gijs (author), Wang, Tianshi (author)Optical imaging techniques that provide free space, label free imaging are powerful tools in obtaining structural and biochemical information in biological samples. To date, most of the optical imaging technologies create images with a specific contrast and require multimodality integration to add additional contrast. In this study, we...journal article 2022
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Wang, Tianshi (author), Pfeiffer, Tom (author), Akyildiz, A.C. (author), van Beusekom, Heleen M.M. (author), Huber, Robert (author), van der Steen, A.F.W. (author), Soest, Gijs Van (author)Optical coherence elastography (OCE), a functional extension of optical coherence tomography (OCT), visualizes tissue strain to deduce the tissue’s biomechanical properties. In this study, we demonstrate intravascular OCE using a 1.1 mm motorized catheter and a 1.6 MHz Fourier domain mode-locked OCT system. We induced an intraluminal pressure...journal article 2022
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Pfeiffer, S.U. (author), Munaro, Veronica (author), Li, S. (author), Rizzo, Alessandro (author), de Croon, G.C.H.E. (author)Relative localization is a key capability for autonomous robot swarms, and it is a substantial challenge, especially for small flying robots, as they are extremely restricted in terms of sensors and processing while other robots may be located anywhere around them in three-dimensional space. In this article, we generalize wireless ranging...journal article 2022
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Zieher, Thomas (author), Pfeiffer, Jan (author), van Natijne, A.L. (author), Lindenbergh, R.C. (author)Continuous landslide monitoring is a crucial task for the management of natural hazards for identifying suitable mitigation measures, including nature-based solutions. In the present study, three monitoring techniques including (i) an automated tracking total station (ATTS), (ii) multi-temporal terrestrial laser scanning (TLS) and (iii) space...conference paper 2021
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Dehghan, Mehran Dehghan (author), Pfeiffer, Carlos F. (author), Rakhshani, E. (author), Bakhshi-Jafarabadi, Reza (author)Currently, the economy of Middle Eastern countries relies heavily on fossil fuel sources. The direct and indirect adverse consequences of fossil fuel utilization for power generation enforce the region’s countries to raise the share of renewable energy. In this context, various incentive policies have been developed to encourage the...review 2021
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Bahnam, Stavrow (author), Pfeiffer, S.U. (author), de Croon, G.C.H.E. (author)Current existing stereo visual odometry algorithms are computationally too expensive for robots with restricted resources. Executing these algorithms on such robots leads to a low frame rate and unacceptable decay in accuracy. We modify S-MSCKF, one of the most computationally efficient stereo Visual Inertial Odometry (VIO) algorithm, to improve...conference paper 2021
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Pfeiffer, S.U. (author), de Wagter, C. (author), de Croon, G.C.H.E. (author)We present a computationally efficient moving horizon estimator that allows for real-time localization using Ultra-Wideband measurements on small quadrotors. The estimator uses only a single iteration of a simple gradient descent method to optimize the state estimate based on past measurements, while using random sample consensus to reject...journal article 2021
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van Ginkel, H.J. (author), Roels, P. (author), Boeije, M.F.J. (author), Pfeiffer, T.V. (author), Vollebregt, S. (author), Zhang, Kouchi (author), Schmidt-Ott, A. (author)Porous layers composed of nanoparticles (NPs) have a wide range of (potential) applications including catalysts, (chemical) sensors, thermoelectric materials and electronics. These application domains will profit strongly from our NP printing process which is flexible with respect to i) the composition of the NPs and ii) the possibility of...abstract 2020
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Doug Deen, Aaron (author), Pfeiffer, Tom (author), Van Beusekom, Heleen (author), Essers, J. (author), Huber, Robert (author), van der Steen, A.F.W. (author), Van Soest, Gijs (author), Wang, Tianshi (author)The absorption of laser pulses by tissue leads not only to the generation of acoustic waves, but also to nanometer to sub-micrometer scale displacement. After the initial expansion, a quasi-steady state is achieved in a few microseconds. Previously we introduced the concept of thermo-elastic optical coherence tomography (TE-OCT) to "visualise...conference paper 2020
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Cecchetti, Leonardo (author), Wang, Tianshi (author), Hoogendoorn, Ayla (author), Witberg, Karen T. (author), Ligthart, Jurgen M.R. (author), Daemen, Joost (author), van Beusekom, Heleen M.M. (author), Pfeiffer, Tom (author), van der Steen, A.F.W. (author)To quantify the impact of cardiac motion on stent length measurements with Optical Coherence Tomography (OCT) and to demonstrate in vivo OCT imaging of implanted stents, without motion artefacts. The study consists of: clinical data evaluation, simulations and in vivo tests. A comparison between OCT-measured and nominal stent lengths in 101...journal article 2020
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Schreiber, K. A. (author), Samkharadze, Nodar (author), Gardner, G. C. (author), Lyanda-Geller, Y. (author), Manfra, M. J. (author), Pfeiffer, L. N. (author), West, K. W. (author), Csáthy, G. A. (author)In spite of its ubiquity in strongly correlated systems, the competition of paired and nematic ground states remains poorly understood. Recently such a competition was reported in the two-dimensional electron gas at filling factor ν = 5/2. At this filling factor a pressure-induced quantum phase transition was observed from the paired...journal article 2018
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Wang, Tianshi (author), Pfeiffer, Tom (author), Wu, Min (author), Wieser, Wolfgang (author), Amenta, Gaetano (author), Draxinger, Wolfgang (author), van der Steen, A.F.W. (author), Huber, Robert (author), Van Soest, Gijs (author)The absorption of nanosecond laser pulses induces rapid thermo-elastic deformation in tissue. A sub-micrometer scale displacement occurs within a few microseconds after the pulse arrival. In this Letter, we investigate the laser-induced thermo-elastic deformation using a 1.5 MHz phase-sensitive optical coherence tomography (OCT) system. A...journal article 2017
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Eghtebas, Chloe (author), Pay, Yun Suen (author), Väänänen, Kaisa (author), Pfeiffer, Ties (author), Meyer, Joachim (author), Lukosch, S.G. (author)Academia and industry engage in major efforts to develop technologies for augmenting human senses and activities. Many of these technologies, such as augmented reality (AR) and virtual reality (VR) head mounted displays (HMD), haptic augmentation systems, and exoskeletons can be applied in numerous usage contexts and scenarios. We argue that...conference paper 2017
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Feng, J. (author), Guo, Xiaoai (author), Ramlawi, N. (author), Pfeiffer, T.V. (author), Geutjens, R. (author), Basak, S. (author), Nirschl, Hermann (author), Biskos, G. (author), Zandbergen, H.W. (author), Schmidt-Ott, A. (author)High-yield and continuous synthesis of ultrapure inorganic nanoparticles (NPs) of well-defined size and composition has invariably been one of the major challenges in nanotechnology. Employing green techniques that avoid the use of poisonous and expensive chemicals has been realized as a necessity for manufacturing NPs on an industrial scale. In...journal article 2016
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Widder, Stefanie (author), Allen, Rosalind J. (author), Pfeiffer, Thomas (author), Curtis, Thomas P. (author), Wiuf, Carsten (author), Sloan, William T. (author), Cordero, Otto X. (author), Brown, Sam P. (author), Picioreanu, C. (author), Momeni, Babak (author)The importance of microbial communities (MCs) cannot be overstated. MCs underpin the biogeochemical cycles of the earth's soil, oceans and the atmosphere, and perform ecosystem functions that impact plants, animals and humans. Yet our ability to predict and manage the function of these highly complex, dynamically changing communities is...review 2016
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Pfeiffer, T.V. (author), Kedia, P. (author), Messing, M.E. (author), Valvo, M. (author), Schmidt-Ott, A. (author)This article introduces a continuous, gas-phase method for depositing thin metallic coatings onto (nano)particles using a type of physical vapor deposition (PVD) at ambient pressure and temperature. An aerosol of core particles is mixed with a metal vapor cloud formed by spark ablation by passing the aerosol through the spark zone using a hollow...journal article 2015
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Pfeiffer, T.V. (author), Ortiz Gonzalez, J. (author), Santbergen, R. (author), Tan, H. (author), Schmidt-Ott, A. (author), Zeman, M. (author), Smets, A.H.M. (author)A soft deposition method for incorporating surface plasmon resonant metal nanoparticles within photovoltaic devices was studied. This self-assembly method provides excellent control over both nanoparticle size and surface coverage. Films of spherical Ag nanoparticles with diameter of ?100 nm were fabricated by depositing size-selected aerosols...conference paper 2014
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