Searched for: subject:"bias"
(1 - 20 of 25)

Pages

document
Teunissen, P.J.G. (author)

The DIA method for the detection, identification and adaptation of model misspecifications combines estimation with testing. The aim of the present contribution is to introduce a unifying framework for the rigorous capture of this combination. By using a canonical model formulation and a partitioning of misclosure space, we show that the...

journal article 2017
document
Teunissen, P.J.G. (author), Imparato, D. (author), Tiberius, C.C.J.M. (author)
As the navigation solution of exclusion-based RAIM follows from a combination of least-squares estimation and a statistically based exclusion-process, the computation of the integrity of the navigation solution has to take the propagated uncertainty of the combined estimation-testing procedure into account. In this contribution, we analyse,...
journal article 2017
document
van Ham, M. (author), Boschman, S.E. (author), Vogel, M.S. (author)
Studies of neighbourhood effects often attempt to identify causal effects of neighbourhood characteristics on individual outcomes, such as income, education, employment, and health. However, selection looms large in this line of research and it has been repeatedly argued that estimates of neighbourhood effects are biased as people non-randomly...
working paper 2017
document
Boschman, S.E. (author)
Despite a large body of research on neighbourhood effects, there are no clear conclusions how much, if any, independent effect the neighbourhood has on its residents. This is largely due to selection effects. It is therefore crucial to gain more insight in selective residential mobility and neighbourhood choice. A better understanding of...
doctoral thesis 2015
document
Zhang, B. (author), Teunissen, P.J.G. (author)
Care should be taken to minimize adverse impact of receiver differential code biases (DCBs) on global navigation satellite system (GNSS)-derived ionospheric parameters. It is therefore of importance to ascertain the intrinsic characteristics of receiver DCBs, preferably in the context of new-generation GNSS. In this contribution, we present a...
journal article 2015
document
Slobbe, A.T. (author)
The crack band approach (in the smeared crack concept) is widely used for the modeling of concrete fracture and is an important analysis technique within advanced engineering. However, the simulations can be impeded by mesh-induced directional bias. Cracks prefer to propagate along continuous mesh lines, which causes a dependency of the...
doctoral thesis 2015
document
De Winter, J.C.F. (author), Dodou, D. (author)
It is known that statistically significant (positive) results are more likely to be published than non-significant (negative) results. However, it has been unclear whether any increasing prevalence of positive results is stronger in the "softer" disciplines (social sciences) than in the "harder" disciplines (physical sciences), and whether the...
journal article 2015
document
Lacagnina, C. (author), Selten, F. (author), Siebesma, A.P. (author)
To test the impact of modeling uncertainties and biases on the simulation of cloud feedbacks, several configurations of the EC-Earth climate model are built altering physical parameterizations. An overview of the various radiative feedbacks diagnosed from the reference EC-Earth configuration is documented for the first time. The cloud feedback...
journal article 2014
document
Caviola, L. (author), Mannino, A. (author), Savulescu, J. (author), Faulmüller, N. (author)
Research into cognitive biases that impair human judgment has mostly been applied to the area of economic decision-making. Ethical decision-making has been comparatively neglected. Since ethical decisions often involve very high individual as well as collective stakes, analyzing how cognitive biases affect them can be expected to yield important...
journal article 2014
document
Lacagnina, C. (author)
Clouds are prominent in the climate system, since they play a major role in the way energy and water are cycled through the atmosphere. One of the most relevant impacts of the clouds on the earth's climate is their interaction with the radiative fluxes. Changes in this interaction in response to an external perturbation are known as cloud...
doctoral thesis 2014
document
Visser, P.N.A.M. (author), Van den IJssel, J.A.A. (author)
The European Space Agency Gravity field and steady-state Ocean Circular Explorer (GOCE) carries a gradiometer consisting of three pairs of accelerometers in an orthogonal triad. Precise GOCE science orbit solutions (PSO), which are based on satellite-to-satellite tracking observations by the Global Positioning System and which are claimed to be...
journal article 2014
document
Talukdar, K.K. (author)
doctoral thesis 2014
document
Forgaci, C. (author), Van Timmeren, A. (author)
While the complexity of urban environments is growing, the effectiveness of action-driven strategies appears to be decreasing. This paper speculates on three alternative approaches: (1) strategies of inaction; (2) strategies of subtraction or, even more, (3) strategies of hormesis, that keep their subject (cities, neighbourhoods, communities,...
conference paper 2014
document
Slobbe, A.T. (author), Hendriks, M.A.N. (author), Rots, J.G. (author)
conference paper 2013
document
Slobbe, A.T. (author), Hendriks, M.A.N. (author), Rots, J.G. (author)
This paper presents a dedicated numerical test that enables to assess the directional mesh bias of constitutive models in a systematic way. The test makes use of periodic boundary conditions, by which strain localization can be analyzed for different mesh alignments with preservation of mesh uniformity and with exclusion of boundary disturbances...
conference paper 2013
document
Teunissen, P.J.G. (author), De Bakker, P.F. (author)
In this contribution the integrity of single- receiver, single-channel, multi-frequency GNSS models is studied. The uniformly most powerful invariant test statistics for spikes and slips are derived and their detection capabilities are described by means of minimal detectable biases (MDBs). Analytical closed-form expressions of the phase-slip,...
journal article 2013
document
King, M.A. (author), Keshin, M. (author), Whitehouse, P.L. (author), Thomas, I.D. (author), Milne, G. (author), Riva, R.E.M. (author)
The only vertical land movement signal routinely corrected for when estimating absolute sea-level change from tide gauge data is that due to glacial isostatic adjustment (GIA). We compare modeled GIA uplift (ICE-5G + VM2) with vertical land movement at ?300 GPS stations located near to a global set of tide gauges, and find regionally coherent...
journal article 2012
document
Zhang, B. (author), Teunissen, P.J.G. (author), Odijk, D. (author)
In this contribution, a novel un-differenced (UD) (PPP-RTK) concept, i.e. a synthesis of Precise Point Positioning and Network-based Real-Time Kinematic concept, is introduced. In the first step of our PPP-RTK approach, the UD GNSS observations from a regional reference network are processed based upon re-parameterised observation equations,...
journal article 2011
document
Teunissen, P.J.G. (author), De Bakker, P.F. (author)
In this contribution we study the multi-frequency, carrier-phase slip detection capabilities of a single receiver. Our analysis is based on an analytical expression that we present for themulti-frequencyminimal detectable carrier phase cycle slip.
conference paper 2009
document
Broersen, P.M.T. (author)
Several algorithms for the spectral analysis of irregularly sampled random processes can estimate the spectral density for a low frequency range. A new time-series method extended that frequency range with a factor of thousand or more. The new algorithm has two requirements to give useful results. First, at least ten closest pairs of neighboring...
journal article 2009
Searched for: subject:"bias"
(1 - 20 of 25)

Pages