document

How aromatic dissolved organic matter differs in competitiveness against organic micropollutant adsorption

Wang, Q. (author), Lechtenfeld, Oliver J. (author), Rietveld, L.C. (author), Schuster, Jonas (author), Ernst, Mathias (author), Hofman-Caris, Roberta (author), Kaesler, Jan (author), Wang, Chunmiao (author), Yang, Min (author), Yu, Jianwei (author), Zietzschmann, F.E. (author)

Activated carbon is employed for the adsorption of organic micropollutants (OMPs) from water, typically present in concentrations ranging from ng L⁻¹ to μg L⁻¹. However, the efficacy of OMP removal is considerably deteriorated due to competitive adsorption from background dissolved organic matter (DOM), present at...

journal article 2024

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Effect of temperature and humidity on moisture diffusion in an epoxy moulding compound material

Jansen, K.M.B. (author), Zhang, M. F. (author), Ernst, L. J. (author), Vu, D. K. (author), Weiss, L. (author)

In this paper we propose a new multistep characterisation method to be able to map out the dependency of moisture diffusion parameters of a polymeric material over a range of temperature and humidity conditions in a limited amount of time. We do that by (1) using a moisture sorption analyser which can continuously monitor weight changes with...

journal article 2020

document

Effects of Grid Cell Size in Altitude Control in an Augmented Reality Terrain Display

da Silva Rosa, David (author), Ernst, Johanne (author), Borst, C. (author), van Paassen, M.M. (author), Mulder, Max (author)

Helicopter pilot performance in degraded visual conditions may be improved through sensor fusion and an augmented reality display. A simulator experiment with 12 participants was done to test the effect of synthetic terrain grid cell size and helicopter heave dynamics on task performance and control behaviour in a terrain-following hill-climb...

conference paper 2020

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Envisioning user requirements for First-of-a-Kind future rotorcraft

Sushereba, C. (author), Militello, L. (author), Ernst, K. (author), Diiulio, J. (author), Roth, E. (author), Scheff, S. (author), Huff IV, W. (author)

In this paper, we describe an ongoing effort to envision and articulate requirements for the United States Army’s Future Vertical Lift (FVL) program, specifically related to crewing. The goal of FVL is to develop a new family of rotorcraft that will incorporate advanced technologies to support new capabilities. We will discuss the challenges...

conference paper 2019

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Do as i Do, Not as i Say: Do Contribution Guidelines Match the GitHub Contribution Process?

Elazhary, Omar (author), Storey, Margaret-Anne (author), Ernst, Neil (author), Zaidman, A.E. (author)

Developer contribution guidelines are used in social coding sites like GitHub to explain and shape the process a project expects contributors to follow. They set standards for all participants and 'save time and hassle caused by improperly created pull requests or issues that have to be rejected and re-submitted' (GitHub). Yet, we lack a...

conference paper 2019

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Effect of Atmospheric Pressure Plasma Modification on Polyimide and Adhesive Joining with Titanium

Akram, M. (author), Jansen, K.M.B. (author), Ernst, L.J. (author), Bhowmik, S. (author), Ajeesh, G. (author), Ahmed, S. (author), Chakraborty, D. (author)

This investigation highlights the effect of surface modification on polyimide by atmospheric pressure plasma treatment with different exposure time. Surface modification of polymer by plasma treatment essentially creates physical and chemical changes such as cross-linking and formation of free radicals. It also forms oxygen functionalization in...

journal article 2015

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Durability of polyimide to titanium bonds

Akram, M. (author), Jansen, K.M.B. (author), Bhowmik, S. (author), Ernst, L.J. (author)

Titanium and its alloys are usually bonded together using a high temperature resistant polyimide or epoxy adhesives. Such adhesives can withstand temperatures from 200°C to300°C. Earlier research work indicates that Surface modification of titanium with mechanical treatment and atmospheric pressure plasma treatment techniques leads to improved...

conference paper 2012

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Moisture absorption analysis of high performance polyimide adhesive

Akram, M. (author), Jansen, K.M.B. (author), Bhowmik, S. (author), Ernst, L.J. (author)

The high temperature resistant polymers and metal composites are used widely in aviation, space, automotive and electronics industry. The high temperature resistant polymers and metals are joined together using high temperature adhesives. Polyimide and epoxy adhesives that can withstand high temperature (200 °C-300 °C) are commonly used for...

conference paper 2011

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Atmospheric pressure plasma surface modification of titanium for high temperature adhesive bonding

Akram, M. (author), Jansen, K.M.B. (author), Ernst, L.J. (author), Bhowmik, S. (author)

In this investigation surface treatment of titanium is carried out by plasma ion implantation under atmospheric pressure plasma in order to increase the adhesive bond strength. Prior to the plasma treatment, titanium surfaces were mechanically treated by sand blasting. It is observed that the contact angle of de-ionized water decreases with the...

journal article 2011

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Surface modification of polyimide by atmospheric pressure plasma for adhesive bonding with titanium and its application to aviation and space

Akram, M. (author), Bhowmik, S. (author), Jansen, K.M.B. (author), Ernst, L.J. (author)

It is noted that in search of long term and efficient service performance in the context of future generation of aerospace materials, there is increasing need of metal-high performance polymer composite. Based on these considerations, high temperature resistant polymeric sheet such as Polyimide Meldin7001 sheet, is joined with Titanium sheet by...

conference paper 2011

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Effect of chain flexibility in the network structure on the viscoelasticity of epoxy thermosets

Nakka, J.S. (author), Jansen, K.M.B. (author), Ernst, L.J. (author)

In this paper a detailed study in investigating the effect of the chain flexibility in epoxy-amine crosslinked network is done. In order to introduce flexibility into the crosslinked network a homologous series of four aliphatic diamine curing agents varying only in the chain length and having a constant functionality (f?=?4) is taken and cured...

journal article 2011

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Surface Modification of Titanium by Atmospheric Pressure Plasma Treatment for Adhesive Bonding and Its Application to Aviation and Space

Akram, M. (author), Bhowmik, S. (author), Jansen, K. (author), Ernst, L.J. (author)

Titanium is one of the most effective materials for structural application of space craft and aviation. Titanium alloys are widely used in solid rocket booster cases, guidance control pressure vessel and other different applications demanding light weight and reliability. Aerospace industry is also a larger market for titanium products and...

conference paper 2010

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UV and electron-assisted oxidation of Al and Ru

Ernst, M.A. (author)

To ensure a continuing miniaturization in the semiconductor industry, new technologies need to be developed to define ever smaller patterns on the silicon substrates. One of these emerging technologies is extreme ultraviolet (EUV) lithography. Unfortunately, EUV light causes oxidation of the optical components inside the lithography machine that...

doctoral thesis 2009

document

Near-surface attenuation estimation using wave-propagation modeling

El Yadari, N. (author), Ernst, F. (author), Mulder, W. (author)

The effect of the near surface on seismic land data can be so severe that static corrections are insufficient. Full-waveform inversion followed by redatuming may be an alternative, but inversion will work only if the starting model is sufficiently close to the true model. As a first step toward determining a viscoelastic near-surface model, we...

journal article 2008

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Molecular simulation strategy for mechanical modeling of amorphous/porous low-dielectric constant materials

Yuan, C.A. (author), Van der Sluis, O. (author), Zhang, G.Q. (author), Ernst, L.J. (author), Van Driel, W.D. (author), Flower, A.E. (author), Van Silfhout, B.R. (author)

We propose an amorphous/porous molecular connection network generation algorithm for simulating the material stiffness of a low-k material (SiOC:H). Based on a given concentration of the basic building blocks, this algorithm will generate an approximate and large amorphous network. The molecular topology is obtained by distributing these blocks...

journal article 2008

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Ultra-Thin Deformable Silicon Substrates with Lateral Segmentation and Flexible Metal Interconnect

Zoumpouidis, T. (author), Wang, L. (author), Bartek, M. (author), Jansen, K.M.B. (author), Ernst, L.J. (author)

Our progress in developing technology modules for deformable single-crystalline-silicon electronics is presented in this contribution. Additional deformability/reliability is accomplished by modifications of the previously reported ultra-thin and flexible CIRCONFLEX technology (1). The flexibility is added in the last steps of the process flow...

journal article 2007

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Kinetic Characterisation of Molding Compounds

Jansen, K.M.B. (author), Qian, C. (author), Ernst, L.J. (author), Bohm, C. (author), Kessler, A. (author), Preu, H. (author), Stecher, M. (author)

conference paper 2007

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The chemical-mechanical relationship of the SiOC(H) dielectric film

Yuan, C. (author), Van Der Sluis, O. (author), Zhang, G.Q. (author), Ernst, L.J. (author), Van Driel, W.D. (author), Van Silfhout, R.B.R. (author), Thijsse, B.J. (author)

conference paper 2007

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Application of Artifical Neural Networks in Preliminary Sailing Yacht Design

Ernst, G. (author)

report 2007

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Thin Film Interface Fracture Properties at Scales Relevant to Microelectronics

Xiao, A. (author), Wang, L.G. (author), Van Driel, W.D. (author), Van Der Sluis, O. (author), Yang, D.G. (author), Ernst, L.J. (author), Zhang, G.Q. (author)

conference paper 2007