Nucleon Resonances with Hidden Charm in Coupled-Channel Models

The model dependence of the predictions of nucleon resonances with hidden charm is investigated. We consider several coupled-channel models which are derived from relativistic quantum field theory by using (1) a unitary transformation method, and (2) the three-dimensional reductions of Bethe-Salpeter Equation. With the same vector meson exchange mechanism, we find that all models give very narrow molecular-like nucleon resonances with hidden charm in the mass range of 4.3 GeV $< M_R <$ 4.5 GeV, in consistent with the previous predictions.Comment: 17 pages, 3 figure

Phylogeny and expression analysis of C-reactive protein (CRP) and serum amyloid-P (SAP) like genes reveal two distinct groups in fish

This work was funded by British Society of Animal Science/Genesis Faraday to both SAM and SB Immune control of energy reallocation in fish and a BBSRC Research Experience Placements (2010).Peer reviewedPublisher PD

Density Regression Based on Proportional Hazards Family

This paper develops a class of density regression models based on proportional hazards family, namely, Gamma transformation proportional hazard (Gt-PH) model . Exact inference for the regression parameters and hazard ratio is derived. These estimators enjoy some good properties such as unbiased estimation, which may not be shared by other inference methods such as maximum likelihood estimate (MLE). Generalised confidence interval and hypothesis testing for regression parameters are also provided. The method itself is easy to implement in practice. The regression method is also extended to Lasso-based variable selection.National Natural Science Foundation of China (Grant No. 71490725, 71071087 and 11261048

The expression of whirlin and Cav1.3α1 is mutually independent in photoreceptors

AbstractWhirlin is a gene responsible for Usher syndrome type II (USH2) and congenital deafness. In photoreceptors, it organizes a protein complex through binding to proteins encoded by other USH2 genes, usherin (USH2A) and G-protein-coupled receptor 98 (GPR98). Recently, Cav1.3α1 (α1D) has been discovered to interact with whirlin in vitro and these two proteins are localized to the same subcellular compartments in photoreceptors. Accordingly, it is proposed that Cav1.3α1 is in the USH2 protein complex and that the USH2 protein complex is involved in regulating Ca2+ in photoreceptors. To test this hypothesis, we investigated the interdependence of Cav1.3α1 and whirlin expression in photoreceptors. We found that lack of Cav1.3α1 did not change the whirlin distribution or expression level in photoreceptors. In the retina, several Cav1.3α1 splice variants were found at the RNA level. Among them, the whirlin-interacting Cav1.3α1 long variant had no change in its protein expression level in the absence of whirlin. The localization of Cav1.3α1 in photoreceptors, published previously, cannot be confirmed. Therefore, the mutual independence of whirlin and Cav1.3α1 expressions in photoreceptors suggests that Cav1.3α1 may not be a key member of the USH2 protein complex at the periciliary membrane complex

Tau functions as Widom constants

We define a tau function for a generic Riemann-Hilbert problem posed on a union of non-intersecting smooth closed curves with jump matrices analytic in their neighborhood. The tau function depends on parameters of the jumps and is expressed as the Fredholm determinant of an integral operator with block integrable kernel constructed in terms of elementary parametrices. Its logarithmic derivatives with respect to parameters are given by contour integrals involving these parametrices and the solution of the Riemann-Hilbert problem. In the case of one circle, the tau function coincides with Widom's determinant arising in the asymptotics of block Toeplitz matrices. Our construction gives the Jimbo-Miwa-Ueno tau function for Riemann-Hilbert problems of isomonodromic origin (Painlev\'e VI, V, III, Garnier system, etc) and the Sato-Segal-Wilson tau function for integrable hierarchies such as Gelfand-Dickey and Drinfeld-Sokolov.Comment: 26 pages, 6 figure

Device Identification and Authentication with Radar and UWB Ranging

Devices such as tablets and smart displays can be automatically unlocked when a user carrying a compatible wearable device approaches. With user permission, the event of the user being in close proximity is detected, and the user is authenticated by communicating with the wearable device using ultra-wideband (UWB) radio. However, UWB ranging can suffer from front-back ambiguity such that the detection of the presence of a user that is behind the device can unlock the device, which can lead to security and/or privacy risk. This disclosure discloses a two-pronged approach to user identification, user authentication, and front-back disambiguation during automatic unlocking of a device using UWB radio. UWB radio is used to achieve handshaking and user-profile identification. Radar is used to provide front/back information. False positives are avoided by authenticating the user when a difference between the distances reported by radar and by UWB are within a threshold

On the possibility of superconductivity in PrBa2Cu3O7

Recent reports about observations of superconductivity in PrBa2Cu3O7 raise a number of questions: (i) of various theories striving to explain the Tc suppression in PrxY{1-x}Ba2Cu3O7, are there any compatible with possible superconductivity in stoichiometric PrBa2Cu3O7? (ii) if this superconductivity is not an experimental artifact, are the superconducting carriers (holes) of the same character as in the other high-Tc cuprates, or do they represent another electronic subsystem? (iii) is the underlying mechanism the same as in other high-Tc superconductors? I present an answer to the first two questions, while leaving the last one open.Comment: 4 pages 4 eps fig

Nonlocality of Hardy type in experiments using independent particle sources

By applying Hardy's argument, we demonstrate the violation of local realism in a gedanken experiment using independent and separated particle sources.Comment: 9 pages, 1 fig, revtex, title change

Teaching Children with Autism to Understand Metaphors

The purpose of this study was to evaluate the effects of an instructional procedure on the acquisition and generalization of metaphorical understanding for children with autism spectrum disorder. Three students (two boys, one girl, 5-8 years old) participated but only two completed the study. A multiple-probe design across two behaviors and three participants was used. The metaphors were categorized by topography: metaphors involving physical features and metaphors involving abstract properties. The instruction consisted of intraverbal training using echoic prompts, picture prompts, and textual prompts. The results indicated that the instruction was effective in establishing metaphorical understanding of target metaphors. Generalized understanding to untaught metaphors occurred for the two students who completed the study, and all metaphors were maintained at a relatively high level for two months following the instruction