Searched for: subject%3A%22Quartz%22
(1 - 13 of 13)
document
Shokrolahzade, E. (author), De Martino, C. (author), Spirito, M. (author)
In this contribution we present an approach to reduce the error arising from the variations of the lumped load, due to process spread, in probe level calibrations. First, full-wave electromagnetic (EM) simulations are employed to generate the nominal standard responses, then a parametric EM simulation of the load structure is used to generate a...
conference paper 2023
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Zhang, H. (author), Dabironezare, Shahab Oddin (author), Baselmans, J.J.A. (author), Llombart, Nuria (author)
Large format focal plane arrays (FPAs) of dielectric lenses are promising candidates for wide field-of-view submillimeter imagers. In this work, we optimize the scanning gain of such imagers via shaping lens surfaces. We develop an optimization procedure using a field correlation technique between the fields generated by a reflector on the...
journal article 2023
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Schilperoort, Frank (author)
Electret transducers utilize the electric field generated by an electret, a dielectric with a quasi-permanent embedded charge, to induce charge on an electrode. When the electret is moved relative to the electrode, the induced charge magnitude on the electrode changes, generating a current that can be used to convert mechanical energy into...
master thesis 2022
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de Jong, Rémy (author)
Microfluidic extraction is a promising alternative for existing extraction methods of radioisotopes due to the high surface-to-volume ratio. When assessing the compatibility of microfluidic material with the extraction system, there are three critical aspects—compatibility with organic solvents, compatibility with the radiochemistry, and, most...
master thesis 2022
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van Ginkel, H.J. (author), Vollebregt, S. (author), Schmidt-Ott, A. (author), Zhang, Kouchi (author)
A method is presented to directly measure the mass output of an impaction printer coupled with a spark ablation generator. It is based on a quartz crystal microbalance and shown to be reliable in quantifying mass deposition rate. Here, the method is demonstrated with an Au nanoparticle aerosol synthesized under several spark ablation and...
journal article 2022
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Zijlmans, Maarten (author)
Despite prostate cancer being the most prevalent type of cancer among males above the age of 55, nationalscreening programs are not conducted because of the high rate of false positives this would bring. This thesisintroduces surface acoustic wave sensors into the field of prostate cancer diagnosis which has the potential tomeasure the...
master thesis 2021
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Spruit, Jan Willem (author)
In this thesis the design possibilities to replace a Lavet-type motor with an electrostatic motor are investigated. At the moment, almost all quartz watches use a Lavet type of motor. Two electrostatic conceptual designs are made by Timex and Accutron. An electrostatic motor for the watch application looks promising due to the more efficient...
master thesis 2021
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Yalçinkaya, Ç. (author), Felekoglu, Burak (author), Yazici, Halit (author)
Rheology and shrinkage are the key features that should be controlled to perform a successful casting process and obtain a durable ultra-high performance concrete (UHPC). It is anticipated that cast-in-situ applications of UHPC will increase in the near future, so the studies on early-age properties of UHPC have come into prominence. However,...
journal article 2020
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Elpenhof, Chris (author)
Mining projects around the world face a significant challenge to reduce their footprint and be more environmentally friendly. Research has shown that mineral processing is of major influence, due to the use of heavy chemicals that are both expensive and polluting. Currently, electrowinning (the electrodeposition of metals) is only used in the...
master thesis 2019
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Wang, Liquan (author), Liu, Ziyang (author), Xu, Shida (author), Ouyang, Xiaowei (author), Ouyang, Dong (author), Jiao, Chujie (author), Zhang, Y. (author)
The production of cement leads to a large amount of CO<sub>2</sub> emission. Using industrial waste slag, such as ceramic polishing powder (PP), to replace part of Portland cement can reduce the pollution caused by the cement industry and solid waste disposal. In order to use PP as a replacement for cement, its effects on the properties of...
journal article 2019
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Houri, S. (author), Geuze, M.J. (author), Venstra, W.J. (author)
We demonstrate thermo-mechanical relaxation oscillations in a strongly driven quartz crystal. Dynamic bifurcation leads to two stable oscillation states with a distinct electrical impedance. Slow Joule-heating, which shifts the susceptibility of the crystal, provides a feedback that leads to thermally induced oscillations in which the amplitude...
journal article 2015
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Rubio-Bollinger, G. (author), Castellanos-Gomez, A. (author), Bilan, S. (author), Zotti, L.A. (author), Arroyo, C.R. (author), Agraït, N. (author), Cuevas, J. (author)
We fabricate and characterize carbon-fiber tips for their use in combined scanning tunneling and force microscopy based on piezoelectric quartz tuning fork force sensors. An electrochemical fabrication procedure to etch the tips is used to yield reproducible sub-100-nm apex. We also study electron transport through singlemolecule junctions...
journal article 2012
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Ballarini, M. (author)
Optically Stimulated Luminescence (OSL) dating is a tool used in Quaternary Geology for assessing ages of depositional mineral grains such as quartz, feldspars and zircons. In particular, OSL showed to be exceptionally robust and reliable for dating quartz samples. Such a technique has been successfully applied in the age range of 1.000 up to...
doctoral thesis 2006
Searched for: subject%3A%22Quartz%22
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