19,415 research outputs found
Body composition of young Chinese adults by bioelectrical impedance analysis
published_or_final_versio
On repression, and avoiding red herrings
In this response to Otgaar et al. (in press) we point out that their concern with the notion of unconscious repression is a classic example of a red herring, as it has never been endorsed as an explanation of recovered memories. We also note that Otgaar et al. have misunderstood the purpose of our article (Brewin, Li, Ntarantana, Unsworth, & McNeilis, 2019). Its aim was to demonstrate that many of the claims made by psychologists about the public’s views on memory do not rest on sound methodology. Beliefs about repression featured as one example, but it was not our objective to establish what the public do think about repression. We welcome Otgaar et al.’s (in press) additional data but regret that they have repeated the basic error we highlighted, the reliance on a single questionnaire item to assess beliefs about highly complex topics. Nevertheless, their and our findings clearly indicate that understanding of the public’s views on repression remains extremely limited, and insufficient to meaningfully contribute to legal processes
Inferring hidden Markov models from noisy time sequences: a method to alleviate degeneracy in molecular dynamics
We present a new method for inferring hidden Markov models from noisy time
sequences without the necessity of assuming a model architecture, thus allowing
for the detection of degenerate states. This is based on the statistical
prediction techniques developed by Crutchfield et al., and generates so called
causal state models, equivalent to hidden Markov models. This method is
applicable to any continuous data which clusters around discrete values and
exhibits multiple transitions between these values such as tethered particle
motion data or Fluorescence Resonance Energy Transfer (FRET) spectra. The
algorithms developed have been shown to perform well on simulated data,
demonstrating the ability to recover the model used to generate the data under
high noise, sparse data conditions and the ability to infer the existence of
degenerate states. They have also been applied to new experimental FRET data of
Holliday Junction dynamics, extracting the expected two state model and
providing values for the transition rates in good agreement with previous
results and with results obtained using existing maximum likelihood based
methods.Comment: 19 pages, 9 figure
Multispace and Multilevel BDDC
BDDC method is the most advanced method from the Balancing family of
iterative substructuring methods for the solution of large systems of linear
algebraic equations arising from discretization of elliptic boundary value
problems. In the case of many substructures, solving the coarse problem exactly
becomes a bottleneck. Since the coarse problem in BDDC has the same structure
as the original problem, it is straightforward to apply the BDDC method
recursively to solve the coarse problem only approximately. In this paper, we
formulate a new family of abstract Multispace BDDC methods and give condition
number bounds from the abstract additive Schwarz preconditioning theory. The
Multilevel BDDC is then treated as a special case of the Multispace BDDC and
abstract multilevel condition number bounds are given. The abstract bounds
yield polylogarithmic condition number bounds for an arbitrary fixed number of
levels and scalar elliptic problems discretized by finite elements in two and
three spatial dimensions. Numerical experiments confirm the theory.Comment: 26 pages, 3 figures, 2 tables, 20 references. Formal changes onl
Bound exciton and free exciton states in GaSe thin slab
The photoluminescence (PL) and absorption experiments have been performed in
GaSe slab with incident light polarized perpendicular to c-axis of sample at
10K. An obvious energy difference of about 34meV between exciton absorption
peak and PL peak (the highest energy peak) is observed. By studying the
temperature dependence of PL spectra, we attribute it to energy difference
between free exciton and bound exciton states, where main exciton absorption
peak comes from free exciton absorption, and PL peak are attributed to
recombination of bound exciton at 10K. This strong bound exciton effect is
stable up to 50K. Moreover, the temperature dependence of integrated PL
intensity and PL lifetime reveals that a non-radiative process, with active
energy extracted as 0.5meV, dominates PL emission.Comment: 10 pages, 4 figure
Fast and Accurate Camera Covariance Computation for Large 3D Reconstruction
Estimating uncertainty of camera parameters computed in Structure from Motion
(SfM) is an important tool for evaluating the quality of the reconstruction and
guiding the reconstruction process. Yet, the quality of the estimated
parameters of large reconstructions has been rarely evaluated due to the
computational challenges. We present a new algorithm which employs the sparsity
of the uncertainty propagation and speeds the computation up about ten times
\wrt previous approaches. Our computation is accurate and does not use any
approximations. We can compute uncertainties of thousands of cameras in tens of
seconds on a standard PC. We also demonstrate that our approach can be
effectively used for reconstructions of any size by applying it to smaller
sub-reconstructions.Comment: ECCV 201
Chinese sentiment classification based on stacking combination method
2010-2011 > Academic research: refereed > Publication in refereed journalVersion of RecordPublishe
Chinese word segmentation based on word boundary decision
2009-2010 > Academic research: refereed > Publication in refereed journalVersion of RecordPublishe
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