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Ellis, Michael D. (author), Gurari, Netta (author), Gerritsen, Ninette T.A. (author), Lee, Sabrina M. (author), Wang, Amy (author), Dewald, J.P.A. (author)
Muscle tissue is prone to changes in composition and architecture following stroke. Changes in muscle tissue of the extremities are thought to increase resistance to muscle elongation or joint torque under passive conditions. These effects likely compound neuromuscular impairments, exacerbating movement function. Unfortunately, conventional...
journal article 2023
document
Prinzel, L. (author), Ellis, K. (author), Ballard, K. (author), Lake, R. (author), Nicholas, S. (author), Arthur, T. (author), Kiggins, D. (author)
A Commercial Aviation Safety Team (CAST) study of 18 worldwide loss-ofcontrol accidents and incidents determined that the lack of external visual references was associated with a flight crew’s loss of attitude awareness or energy state awareness in 17 of these events. CAST recommended development and implementation of virtual day-Visual...
conference paper 2019
document
Van Eechoud, M. (author), Van Velze, S. (author), Caspers, M. (author), Eskens, S.J. (author), Leerssen, P. (author), Austere, L. (author), Broomfield, H. (author), De Terwanghe, C. (author), Ellis, J. (author), Miska, M. (author), Lubarda, M. (author), Valero-Torrijos, J. (author), Pardo-Lopez, M. (author), Grothe, M. (author), Van Loenen, B. (author), Vrecar, S. (author), De Vries, M. (author)
journal article 2014
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Van Eechoud, M. (author), Van Velze, S. (author), Caspers, M. (author), Eskens, S.J. (author), Leerssen, P. (author), Austere, L. (author), Broomfield, H. (author), De Terwanghe, C. (author), Ellis, J. (author), Hittmar, G. (author), Morando, F. (author), Lubarda, M. (author), Van Loenen, B. (author), Sappa, C. (author), De Vries, M. (author)
journal article 2014
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Ellis, J.D. (author), Spronck, J.W. (author)
A compact, balanced, up to three degrees of freedom measuring interferometer which enables fiber delivery of an optical source without periodic nonlinearity, an interferometer system, and method for using an interferometer to measure up to three degrees of freedom is disclosed.
patent 2013
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Ellis, J.D. (author), Meskers, A.J.H. (author), Spronck, J.W. (author), Munnig Schmidt, R.H. (author)
Displacement interferometry is widely used for accurately characterizing nanometer and subnanometer displacements in many applications. In many modern systems, fiber delivery is desired to limit optical alignment and remove heat sources from the system, but fiber delivery can exacerbate common interferometric measurement problems, such as...
journal article 2011
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Ellis, Jonathan David (author)
This thesis work is optical metrology techniques to determine material stability. In addition to displacement interferometry, topics such as periodic nonlinearity, Fabry-Perot interferometry, refractometry, and laser stabilization are covered.
doctoral thesis 2010
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Van Ommen, J.R. (author), Ellis, N. (author), Yurteri, C. (author), Marijnissen, J.C.M. (author)
The invention is directed to a process and apparatus for preparing coated particles, in particular a process for preparing particles that are coated with small particles using electrospraying. The coated particles produced according to the present invention find use for instance as catalysts or as pharmaceuticals. According to the invention a...
patent 2010
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Joo, K.N. (author), Ellis, J.D. (author), Spronck, J.W. (author)
Laser interferometer comprising a laser light source providing at least one light beam at two distinct frequencies, a beam splitter for splitting the at least one light beam into reference and measurement beams, a first reflector and a second reflector for reflection of the reference and measurement beams, and at least one detector for detection...
patent 2010
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Ellis, J.D. (author), Joo, K.N. (author), Buice, E.S. (author), Spronck, J.W. (author)
Accurate and traceable length metrology is employed by laser frequency stabilization. This paper describes a laser frequency stabilzation technique as a secondary standard with a fractional frequency stability of 5.2×10?10 with 2 mW of power, suitable for practical applications. The feedback stabilization is driven by an intrinsic mixed mode...
journal article 2010
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Joo, K.N. (author), Ellis, J.D. (author), Buice, E.S. (author), Spronck, J.W. (author), Munnig Schmidt, R.H. (author)
A high resolution heterodyne laser interferometer without periodic nonlinearity for linear displacement measurements is described. It uses two spatially separated beams with an offset frequency and an interferometer configuration which has no mixed states to prevent polarization mixing. In this research, a simple interferometer configuration for...
journal article 2010
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Joo, K.M. (author), Ellis, J.D. (author), Spronck, J.W. (author), Munnig Schmidt, R.H. (author)
We present a folded, multi-pass cavity design for displacement measuring Fabry–Perot interferometry. The cavity length is designed to be one-quarter of the physical length needed for a typical Fabry–Perot interferometer by using a quarter-wave plate and a retroreflector. This enhances the displacement sensitivity by a factor of four, allowing...
journal article 2009
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Ellis, J.D. (author), Joo, K.N. (author), Spronck, J.W. (author), Munnig Schmidt, R.H. (author)
We describe two different, double-sided interferometer designs for measuring material stability. Both designs are balanced interferometers where the only optical path difference is the sample and the reference beams are located within the interferometer. One interferometer is a double-pass design, whereas the other is a single-pass system. Based...
journal article 2009
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Joo, K.N. (author), Ellis, J.D. (author), Spronck, J.W. (author), Van Kan, P.J.M. (author), Munnig Schmidt, R.H. (author)
We describe a simple heterodyne laser interferometer that has subnanometer periodic errors and is applicable to industrial fields. Two spatially separated beams can reduce the periodic errors, and the use of a right-angle prism makes the optical configuration much simpler than previous interferometers. Moreover, the optical resolution can be...
journal article 2009
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Ellis, J. (author)
conference paper 2002
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Ellis, D.G. (author)
Subsonic wind tunnel tests were conducted on a series of leading edge vortex flaps to determine the improvements in lift/drag ratio that were possible. Various flap sizes and deflection angles were investigated. Trailing edge flap effects on leading edge vortex flap behaviour were also studied. Lift/drag ratio improvements of more than 20% were...
report 1986
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Ohman, L.H. (author), Brown, D. (author), Bowker, A.J. (author), Ellis, F.A. (author)
Although the NAE 5 ft X 5 ft Blowdown Wind Tunnel was conceived in the 1950's, with commissioning in 1962/63, it has stood the test of time very well and is still, in 1985, in heavy demand. We may cite three main reasons for this situation: (i) the basic wind tunnel design was fundamentally very sound, (li) the wind tunnel circuit and its...
report 1985
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Ellis, A.T. (author)
conference paper 1982
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Johnston, G.W. (author), Seshagiri, B.V. (author), Ellis, N.D. (author)
report 1976
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Ellis, N.D. (author), Rushwald, I.B. (author), Ribner, H.S. (author)
report 1974
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