3,955 research outputs found
violation in meson decays at Belle
violation and branching fraction measurements in decays are
interesting topics as any difference with respect to the Standard Model
prediction would be an indication of new physics. With the large data sample
collected by the Belle detector, which sits at the interaction point of KEKB
asymmetric collider in Japan, we present the results of searches
for violation in decay and the rare decay .Comment: ICNFP 2016 proceeding
Similarities between protein folding and granular jamming.
Grains and glasses, widely different materials, arrest their motions upon decreasing temperature and external load, respectively, in common ways, leading to a universal jamming phase diagram conjecture. However, unified theories are lacking, mainly because of the disparate nature of the particle interactions. Here we demonstrate that folded proteins exhibit signatures common to both glassiness and jamming by using temperature- and force-unfolding molecular dynamics simulations. Upon folding, proteins develop a peak in the interatomic force distributions that falls on a universal curve with experimentally measured forces on jammed grains and droplets. Dynamical signatures are found as a dramatic slowdown of stress relaxation upon folding. Together with granular similarities, folding is tied not just to the jamming transition, but a more nuanced picture of anisotropy, preparation protocol and internal interactions emerges. Results have implications for designing stable polymers and can open avenues to link protein folding to jamming theory
Relaxation in open one-dimensional systems
A new master equation to mimic the dynamics of a collection of interacting
random walkers in an open system is proposed and solved numerically.In this
model, the random walkers interact through excluded volume interaction
(single-file system); and the total number of walkers in the lattice can
fluctuate because of exchange with a bath.In addition, the movement of the
random walkers is biased by an external perturbation. Two models for the latter
are considered: (1) an inverse potential (V 1/r), where r is the
distance between the center of the perturbation and the random walker and (2)
an inverse of sixth power potential (). The calculated
density of the walkers and the total energy show interesting dynamics. When the
size of the system is comparable to the range of the perturbing field, the
energy relaxation is found to be highly non-exponential. In this range, the
system can show stretched exponential () and even
logarithmic time dependence of energy relaxation over a limited range of time.
Introduction of density exchange in the lattice markedly weakens this
non-exponentiality of the relaxation function, irrespective of the nature of
perturbation
Handling non-compositionality in multilingual CNLs
In this paper, we describe methods for handling multilingual
non-compositional constructions in the framework of GF. We specifically look at
methods to detect and extract non-compositional phrases from parallel texts and
propose methods to handle such constructions in GF grammars. We expect that the
methods to handle non-compositional constructions will enrich CNLs by providing
more flexibility in the design of controlled languages. We look at two specific
use cases of non-compositional constructions: a general-purpose method to
detect and extract multilingual multiword expressions and a procedure to
identify nominal compounds in German. We evaluate our procedure for multiword
expressions by performing a qualitative analysis of the results. For the
experiments on nominal compounds, we incorporate the detected compounds in a
full SMT pipeline and evaluate the impact of our method in machine translation
process.Comment: CNL workshop in COLING 201
Differential-Flatness and Control of Quadrotor(s) with a Payload Suspended through Flexible Cable(s)
We present the coordinate-free dynamics of three different quadrotor systems
: (a) single quadrotor with a point-mass payload suspended through a flexible
cable; (b) multiple quadrotors with a shared point-mass payload suspended
through flexible cables; and (c) multiple quadrotors with a shared rigid-body
payload suspended through flexible cables. We model the flexible cable(s) as a
finite series of links with spherical joints with mass concentrated at the end
of each link. The resulting systems are thus high-dimensional with high
degree-of-underactuation. For each of these systems, we show that the dynamics
are differentially-flat, enabling planning of dynamically feasible
trajectories. For the single quadrotor with a point-mass payload suspended
through a flexible cable with five links (16 degrees-of-freedom and 12
degrees-of-underactuation), we use the coordinate-free dynamics to develop a
geometric variation-based linearized equations of motion about a desired
trajectory. We show that a finite-horizon linear quadratic regulator can be
used to track a desired trajectory with a relatively large region of
attraction
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