1,153 research outputs found
Investigation at High and Low Subsonic Mach Numbers of Two Symmetrical 6-percent-thick Airfoil Sections Designed to Have High Maximum Lift Coefficients at Low Speeds
Wind-tunnel Investigation at High and Low Subsonic Mach Numbers of a Thin Sweptback Wing Having an Airfoil Section Designed for High Maximum Lift
A convenient approach to characterizing model uncertainty with application to early dark energy solutions of the Hubble tension
Despite increasingly precise observations and sophisticated theoretical
models, the discrepancy between measurements of H0 from the cosmic microwave
background or from Baryon Acoustic Oscillations combined with Big-Bang
Nucleosynthesis versus those from local distance ladder probes -- commonly
known as the tension -- continues to perplex the scientific community. To
address this tension, Early Dark Energy (EDE) models have been proposed as
alternatives to CDM, as they can change the observed sound horizon and
the inferred Hubble constant from measurements based on this. In this paper, we
investigate the use of Bayesian Model Averaging (BMA) to evaluate EDE as a
solution to the H0 tension. BMA consists of assigning a prior to the model and
deriving a posterior as for any other unknown parameter in a Bayesian analysis.
BMA can be computationally challenging in that one must approximate the joint
posterior of both model and parameters. Here we present a computational
strategy for BMA that exploits existing MCMC software and combines
model-specific posteriors post-hoc. In application to a comprehensive analysis
of cosmological datasets, we quantify the impact of EDE on the H0 discrepancy.
We find an EDE model probability of 90% whenever we include the H0
measurement from Type Ia Supernovae in the analysis, whereas the other data
show a strong preference for the standard cosmological model. We finally
present constraints on common parameters marginalized over both cosmological
models. For reasonable priors on models with and without EDE, the H0 tension is
reduced by at least 20%
Investigation of NACA 64,2-432 and 64,3-440 Airfoil Sections with Boundary-layer Control and an Analytical Study of Their Possible Applications
Mutual Information of Population Codes and Distance Measures in Probability Space
We studied the mutual information between a stimulus and a large system
consisting of stochastic, statistically independent elements that respond to a
stimulus. The Mutual Information (MI) of the system saturates exponentially
with system size. A theory of the rate of saturation of the MI is developed. We
show that this rate is controlled by a distance function between the response
probabilities induced by different stimuli. This function, which we term the
{\it Confusion Distance} between two probabilities, is related to the Renyi
-Information.Comment: 11 pages, 3 figures, accepted to PR
Neural responses to facial and vocal expressions of fear and disgust
Neuropsychological studies report more impaired responses to facial expressions of fear than disgust in people with amygdala lesions, and vice versa in people with Huntington's disease. Experiments using functional magnetic resonance imaging (fMRI) have confirmed the role of the amygdala in the response to fearful faces and have implicated the anterior insula in the response to facial expressions of disgust. We used fMRI to extend these studies to the perception of fear and disgust from both facial and vocal expressions. Consistent with neuropsychological findings, both types of fearful stimuli activated the amygdala. Facial expressions of disgust activated the anterior insula and the caudate-putamen; vocal expressions of disgust did not significantly activate either of these regions. All four types of stimuli activated the superior temporal gyrus. Our findings therefore (i) support the differential localization of the neural substrates of fear and disgust; (ii) confirm the involvement of the amygdala in the emotion of fear, whether evoked by facial or vocal expressions; (iii) confirm the involvement of the anterior insula and the striatum in reactions to facial expressions of disgust; and (iv) suggest a possible general role for the perception of emotional expressions for the superior temporal gyrus
SatNOGS Project
Our project is to build and contribute improvements to an existing open source ground station design. This project called SatNOGS (Satellite Networked Open Ground Station) was started a year ago by the Libre Space Foundation in Athens, Greece to address the problem of data downlink from Low Earth Orbiting Satellites. We are most interested in improving the ease of construction of the ground station to enable more people to deploy ground stations
Co-patentsâ commercialization: evidence from China
Co-patents are outcomes of R&D collaboration, which has been
proven with higher-quality. Does this mean that high-quality patents
should also extend their advantage to the technology market?
Based on the transaction cost theory, we use the China
National Intellectual Property Administration (CNIPA) database
and logit model to explore the effect of co-ownership on firmsâ
patent commercialization and the factors of co-patents that affect
their commercialization. Our findings illustrate that co-ownership
has a negative impact on patent commercialization. In addition,
the co-ownerâs nature, country, and co-patentâs industry influence
the commercialization of co-patents. Firstly, a company and a university
or research institutionâs co-owned co-patents are less likely
to be commercialization than a company and a company coowned
co-patents. Secondly, multi-countries co-owned co-patents
are less likely to be commercialization than a single-country coowned
co-patents. Thirdly, co-patents in high technology (hightech)
industries are less likely to be commercialization than copatents
in non-high-tech industries. This paper supports policymakers
in implementing policies to promote the co-patentsâ commercialization.
Meanwhile, our paper suggests that to pursue the
economic value of the R&D collaborative intellectual property
fruits, R&D collaborative intellectual property fruits are not be
encouraged to be applied as the co-patents.European Union (EU)
TIN2016-75850-
- âŠ