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Improved Situation Awareness for Public Safety Workers while Avoiding Information Overload (extended abstract)

De Lignie, M. (author), Hu, B.B. (author), Wijngaards, N. (author)

This research stems from the MOSAIC project, a part of the valorization and knowledge transfer effort of the Interactive Collaborative Information Systems (ICIS) research programme (http://www.icis.decis.nl/), supported by the Dutch Ministry of Economic Affairs, grant no.: BSIK03024. ICIS is hosted by the D-CIS Lab (http://www.decis.nl/), the...

conference paper 2008

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A Rule-Based System for Contextualized Information Delivery

Hu, B. (author), Hidders, A.J.H. (author), De Lignie, M. (author), Cimiano, P. (author)

When carrying out tasks, police officers need up-to-date information contextualized to their current situation to support them in decision making. The results of a previous user study with the aim of capturing the information requirements of police officers have led to the implementation of a rule-based system for contextualized information...

conference paper 2011

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Recycling of WEEE by magnetic density separation

Hu, B. (author), Giacometti, L. (author), Di Maio, F. (author), Rem, P.C. (author)

The paper introduces a new recycling method of WEEE: Magnetic Density Separation. By using this technology, both grade and recovery rate of recycled products are over 90%. Good separations are not only observed in relatively big WEEE samples, but also in samples with smaller sizes or electrical wires.

conference paper 2011

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Wing flexibility effects in clap-and-fling

Percin, M. (author), Hu, Y. (author), Van Oudheusden, B.W. (author), Remes, B. (author), Scarano, F. (author)

The work explores the use of time-resolved tomographic PIV measurements to study a flapping-wing model, the related vortex generation mechanisms and the effect of wing flexibility on the clap-and-fling movement in particular. An experimental setup is designed and realized in a water tank by use of a single wing model and a mirror plate to...

conference paper 2011

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Interaction between hydrodynamics and salt marsh dynamics: An example from Jiangsu coast

Hu, Z. (author), Stive, M.J.F. (author), Zitman, T.J. (author), Ye, Q.H. (author), Wang, Z.B. (author), Luijendijk, A. (author), Gong, Z. (author), Suzuki, T. (author)

Salt marshes are distributed along more than 400 km of the Jiangsu coast in Eastern China, which are regarded as important habitats and serve as coastal protection as well. Previous research has proven that salt-marsh vegetation can reduce current velocity and dampen waves by its stems and leaves. Reversely, hydrodynamic forces also have a...

conference paper 2011

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The effect of electrical current flow on cement-based microstructure: Bulk matrix alterations within cathodic protection in reinforced concrete

Koleva, D.A. (author), van Breugel, K. (author), Hu, J. (author)

conference paper 2012

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Tailor-made nano materials for corrosion control and improved matrix characteristics in cement-based systems

Koleva, D.A. (author), van Breugel, K. (author), Hu, J. (author)

conference paper 2012

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Drag coefficient of vegetation in flow modeling

Hu, Z. (author), Stive, M.J.F. (author), Zitman, T.J. (author), Suzuki, T. (author)

Poster. The interaction between aquatic plants and hydrodynamic force and its implication on the long-term landscape development have received intention from ecology, geology and hydraulic engineering.

conference paper 2012

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Magnetic fluid equipment for sorting of secondary polyolefins from waste

Rem, P.C. (author), Di Maio, F. (author), Hu, B. (author), Houzeaux, G. (author), Baltes, L. (author), Tierean, M. (author)

The paper presents the researches made on the FP7 project „Magnetic Sorting and Ultrasound Sensor Technologies for Production of High Purity Secondary Polyolefins from Waste” in order to develop a magnetic fluid equipment for sorting of polypropylene (PP) and polyethylene (PE) from polymers mixed waste streams. Because both PP and PE float in...

conference paper 2012

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The influence of pluronic P123 micelles on corrosion behaviour of steel in cement extract and bulk matrix properties of cement paste

Koleva, D.A. (author), Denkova, A.G. (author), Hu, J. (author), van Breugel, K. (author)

The influence of Pluronic P123 (PEO20-PPO20-PEO70) micelles (of 10 nm size) on the corrosion behaviour of low carbon steel in cement extract (CE) was studied using electrochemical impedance spectroscopy (EIS) and potentio-dynamic polarisation (PDP). Additionally, mercury intrusion porosimetry (MIP) was emplo ed to derive the impact of admixed...

conference paper 2012

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Directional maximum likelihood self-estimation of the path-loss exponent

Hu, Y. (author), Leus, G.J.T. (author)

The path-loss exponent (PLE) is a key parameter in wireless propagation channels. Therefore, obtaining the knowledge of the PLE is rather significant for assisting wireless communications and networking to achieve a better performance. Most existing methods for estimating the PLE not only require nodes with known locations but also assume an...

conference paper 2016

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RSS-based sensor localization in underwater acoustic sensor networks

Xu, T. (author), Hu, Y. (author), Zhang, Bingbing (author), Leus, G.J.T. (author)

Since the global positioning system (GPS) is not applicable underwater, source localization using wireless sensor networks (WSNs) is gaining popularity in oceanographic applications. Unlike terrestrial WSNs (TWSNs) which uses electromagnetic signaling, underwater WSNs (UWSNs) require underwater acoustic (UWA) signaling. Received signal strength ...

conference paper 2016

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Closing the loop of EOL concrete

Lotfi, Somayeh (author), Rem, P.C. (author), Di Maio, F. (author), Teklay, Abraham (author), Hu, M. (author), van Roekel, E (author), van der Stelt, H (author)

Production of waste materials, via industrial and human activities, creates big environmental and economic problems but also opportunities to recover valuable resources. EU28 currently generates 461 million tons per year of ever more complex Construction and Demolition Waste (CDW) with average recycling rates of around 46%. There is still a...

conference paper 2017

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Life cycle assessment and life cycle costing for demolition waste management

Hu, M. (author), Miranda-Xicotencat, B. (author), Ita-Nagy, D. (author), Prado, V. (author), Guinée, J.B. (author), van Roekel, E (author), Huismans, R. (author), Rens, F. (author), Lotfi, Somayeh (author), Di Maio, F. (author)

Ninety five percent of the construction and demolition waste is recycled in the Netherlands. Most of it is used for low value applications such as road base materials; the use of secondary material in buildings is still less than 3%7. In order to recover waste for higher value applications, enhancing selective demolition and waste management...

conference paper 2017

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A 4.7 THz HEB QCL receiver for STO2

Hayton, Darren J. (author), Gao, J.R. (author), Laauwen, Wouter (author), Mirzaei, B. (author), Khudchenko, Andrey (author), Kloosterman, Jenna L. (author), Paveliev, Dmitry (author), Hu, Qing (author), Kao, Wilt (author), Vax, Vladimir (author), Walker, Chris K. (author)

We report on a 4.7 THz heterodyne receiver designed for high resolution spectroscopy of the astronomically important neutral oxygen (OI) line at 4.745 THz. The receiver is based around a hot electron bolometer (HEB) mixer and quantum cascade laser (QCL) local oscillator. This receiver has been developed to fly on the Stratospheric Terahertz...

conference paper 2017

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Simultaneous frequency locking and monitoring using a bi-directional THz quantum cascade laser

Mirzaei, B. (author), van Marrewijk, N.T. (author), Hayton, D (author), Gao, J.R. (author), Kao, T. Y. (author), Hu, Q. (author), Reno, John L. (author)

We have performed frequency locking of a dual, forward reverse emitting 3rd order distributed feedback quantum cascade laser (QCL) at 3.5 THz. By using both directions of THz emission in combination with two gas cells and two power detectors, we can for the first time perform frequency stabilization, while monitor the frequency locking...

conference paper 2017

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A 5×5 Microwave Permittivity Sensor Matrix in O.14-m CMOS

Hu, Z. (author), Vlachogiannakis, G. (author), Pertijs, M.A.P. (author), de Vreede, L.C.N. (author), Spirito, M. (author)

A 0.14-μ m CMOS 2-D permittivity imaging matrix prototype operating at microwave frequencies is presented. It comprises 25 permittivity-sensing pixels, each consisting of a sensing patch connected to a dedicated RF bridge. A trans-conduct-ance stage converts the imbalance voltage to a current signal, subsequently down-converted to an...

conference paper 2018

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Shock wave-boundary layer interaction in a transitional flow over a backward-facing step

Hu, W. (author), Hickel, S. (author), van Oudheusden, B.W. (author)

The unsteadiness of shock wave-boundary layer interactions is investigated in a transitional backward-facing step flow at Ma=1:7 and Red0 =13718 using large eddy simulation. The mean and instantaneous flow shows that the laminar inflow undergoes a laminar-to-turbulence transition in which Kelvin-Helmholtz vortices form, distort and eventually...

conference paper 2019

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28 GHz Quadrature Frequency Generation Exploiting Injection-Locked Harmonic Extractors for 5G Communications

Gao, Z. (author), Hu, Yizhe (author), Siriburanon, Teerachot (author), Staszewski, R.B. (author)

This paper proposes a mm-wave quadrature frequency generator using injection-locked harmonic extractors (HEs) incorporated with quadrature class-F oscillators. While maintaining high output levels at 28 GHz, the utilization of injection locking technique improves the effective quality ($Q$)-factor and helps to achieve a fundamental harmonic...

conference paper 2019

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Transition mechanism behind a backward-facing step in a supersonic flow

Hu, W. (author), Hickel, S. (author), van Oudheusden, B.W. (author)

The path of laminar-to-turbulent transition behind a backward-facing step (BFS) in the supersonic regime at Ma = 1.7 and Re_δ₀ = 13718 is investigated using a very well-resolved large eddy simulation (LES). Five distinct stages are identified in the transition process by the visualisation of instantaneous flow. The...

conference paper 2019