Searched for: subject:"measurement"
(1 - 20 of 570)

Pages

document
Salimi, Negin (author), Rezaei, J. (author)

Since research and development (R&D) is the most critical determinant of the productivity, growth and competitive advantage of firms, measuring R&D performance has become the core of attention of R&D managers, and an extensive body of literature has examined and identified different R&D measurements and determinants of R&D...

journal article 2018
document
Si, F.T. (author)
The direct utilization of sunlight is a critical energy source in a sustainable future. One of the options is to convert the solar energy into electricity using thin-film silicon-based solar cells (TFSSCs). Solar cells in a triple-junction configuration have exhibited the highest energy conversion efficiencies within the thin-film silicon...
doctoral thesis 2017
document
van Erp, H.R.N. (author), Linger, R.O. (author), van Gelder, P.H.A.J.M. (author)
In this paper, we will give the derivation of an inquiry calculus, or, equivalently, a Bayesian information theory. From simple ordering follow lattices, or, equivalently, algebras. Lattices admit a quantification, or, equivalently, algebras may be extended to calculi. The general rules of quantification are the sum and chain rules. Probability...
journal article 2017
document
Schauer, M.R. (author), van der Meulen, F.H. (author), Van Zanten, H. (author)
A Monte Carlo method for simulating a multi-dimensional diffusion process conditioned on hitting a fixed point at a fixed future time is developed. Proposals for such diffusion bridges are obtained by superimposing an additional guiding term to the drift of the process under consideration. The guiding term is derived via approximation of the...
journal article 2017
document
Rosenbrand, E. (author), van Beek, V.M. (author), van Esch, J.M. (author), Noordam, A. (author), Pederzani, F. (author), Vandenboer, K. (author), Bezuijen, A. (author)
conference paper 2017
document
Kraaikamp, C. (author), Langeveld, Niels (author)

In this paper we consider continued fraction (CF) expansions on intervals different from [0,1]. For every x in such interval we find a CF expansion with a finite number of possible digits. Using the natural extension, the density of the invariant measure is obtained in a number of examples. In case this method does not work, a Gauss–Kuzmin...

journal article 2017
document
Wei, Z. (author), Nunez Vicencio, Alfredo (author), Li, Z. (author), Dollevoet, R.P.B.J. (author)

In this paper, we investigate the capability of an axle box acceleration (ABA) system to evaluate the degradation at railway crossings. For this purpose, information from multiple sensors, namely, ABA signals, 3D rail profiles, Global Positioning System (GPS) and tachometer recordings, was collected from both nominal and degraded crossings....

journal article 2017
document
Bittner, T. (author), Bore, T. (author), Scheuermann, A. (author), Bajodek, M. (author), Witt, K.J. (author)
The rearrangement of soil particles during erosion, which is basically a transient mixing of base and filter particles, is accompanied by changes in porosity, leading to overall settlements which frequently can be severe for geotechnical structures such as levees. Therefore, not only the geometric and hydraulic boundary conditions, but also...
conference paper 2017
document
Dornstädter, J. (author), Fabritius, A. (author), Heinemann, B. (author)
Internal erosion is one of the most frequent reasons of failure and deterioration of embankment dams. Internal erosion is controlled by construction properties (e.g. filter and drain design, grain and pore sizes) and hydrodynamic conditions within the dam. While construction properties are usually known, poor information is available on the...
conference paper 2017
document
Holovchenko, A. (author)
This thesis describes the research directed towards practical realization of an on-chip biosensing technology and that of understanding charge transport mechanisms in organic and biological nanoobjects. For this, silicon-based chips with metallic nanoelectrodes were fabricated using electron-beam lithography and metal evaporation. The final...
doctoral thesis 2017
document
Hassan, A.M. (author), Bruining, J. (author), Musa, Tagwa (author), Chahardowli, M. (author)

Recent developments in Radio Frequency (800 MHz–1000 MHz) Identification (RFID) devices suggest that it is possible to use them for wireless laboratory measurements of the dielectric coefficients (or compositions) of fluid mixtures with possible spin-off for their use in the petroleum engineering practice. The advantage of RFID devices is...

journal article 2017
document
Vos, H.J. (author), van Dalen, Bas M. (author), Heinonen, Ilkka (author), Bosch, Johan G. (author), Sorop, Oana (author), Duncker, Dirk J. (author), van der Steen, A.F.W. (author), de Jong, N. (author)

Cardiac muscle stiffness can potentially be estimated non-invasively with shear wave elastography. Shear waves are present on the septal wall after mitral and aortic valve closure, thus providing an opportunity to assess stiffness in early systole and early diastole. We report on the shear wave recordings of 22 minipigs with high-frame-rate...

journal article 2017
document
Hoonhout, B.M. (author)
This thesis explores the nature of aeolian sediment availability and its influence on aeolian sediment transport. The aim is to improve large scale and long term aeolian sediment transport estimates in (nourished) coastal environments. The generally poor performance of aeolian sediment transport models with respect to measurements in coastal...
doctoral thesis 2017
document
Lu, S. (author)
Volcanic eruptions release a large amount of volcanic ash, which can pose hazard to human and animal health, land transportation, and aviation safety. Volcanic Ash Transport and Dispersion (VATD) models are critical tools to provide advisory information and timely volcanic ash forecasts. Due to the complexity and the uncertainty of many dynamic...
doctoral thesis 2017
document
Holscher, P. (author)
Op 1 februari 2016 heb ik een trillingsmeting uitgevoerd aan de fundering van en de bodem rondom een 3 MW windturbine in het Distripark Waddinxveen. De
windsnelheid tijdens de meting was gemiddeld 15 m/s met pieken tot 23 m/s.
Dit rapport beschrijft de meetopstelling, de postprocessing en de bevindingen.
De meetopstelling bestond uit...
report 2017
document
Ioannou, A. (author), Itard, L.C.M. (author)
Reducing energy consumption in the residential sector is an imperative EU goal until 2020. An important boundary condition in buildings is that energy savings shouldn’t be achieved at the expense of thermal comfort. There is, however, little known about comfort perception in residential buildings and its relation to the PMV theory. In this...
journal article 2017
document
Alonso de Celada Casero, C. (author), Kooiker, Harm (author), Groen, Manso (author), Post, J (author), San Martin, D (author)

An inductive sensor developed by Philips ATC has been used to study in-situ the austenite (γ) to martensite (α′) phase transformation kinetics during tensile testing in an AISI 301 austenitic stainless steel. A correlation between the sensor output signal and the volume fraction of α′-martensite has been found by comparing the results to the...

journal article 2017
document
van der Weijde, J.O. (author), van Ostayen, R.A.J. (author), Vallery, H. (author)
Coil springs are a common element in compliant actuators. For closed-loop control, the force of the coil spring has to be measured. Typically, deflection sensors indirectly measure this force. Implicitly, this assumes that the coil spring is a pure stiffness, without any mass. In reality, internal oscillations can occur due to impacts or other...
journal article 2017
document
Sunil, E. (author), Ellerbroek, J. (author), Hoekstra, J.M. (author), Maas, J.B. (author)
In the context of decentralized separation, airspace stability pertains to the propagation of con?ict chain reactions as a result of tactical con?ict resolution maneuvers. This notion of airspace stability has been used in previous literature to develop a semi-empirical method for determining the capacity of a decentralized direct-routing...
conference paper 2017
document
Sunil, E. (author), Ellerbroek, J. (author), Hoekstra, J.M. (author), Maas, J.B. (author)
Previous research relating airspace structure and ca-pacity has shown that a decentralized layered airspace concept, in which each altitude band limited horizontal travel to within a prede?ned heading range, improved safety when compared to unstructured airspace. However, the extent of the safety bene?ts of such layered airspace designs were not...
conference paper 2017
Searched for: subject:"measurement"
(1 - 20 of 570)

Pages