2,998 research outputs found
On the Commutative Equivalence of Context-Free Languages
The problem of the commutative equivalence of context-free and regular languages is studied. In particular conditions ensuring that a context-free language of exponential growth is commutatively equivalent with a regular language are investigated
Environment induced incoherent controllability
We prove that the environment induced entanglement between two non
interacting, two-dimensional quantum systems S and P can be used to control the
dynamics of S by means of the initial state of P. Using a simple, exactly
solvable model, we show that both accessibility and controllability of S can be
achieved under suitable conditions on the interaction of S and P with the
environment.Comment: revtex4, 5 page
Research, #Huh? Improving research awareness in NHS Grampian through a website and more
Our public-facing website #Huh (Helping U Help) â www.grampianclinicalresearch.
com â has been designed to engage public, patients and staff in clinical research.
We have included views from patients and the public in its design and content,
using multiple methods to gather feedback, some proving more successful than
others. This article presents how our website was developed, including the different
methods we used to gather views from the patients and public before, during and
after its development. We hope that this paper will give useful insights to other
people interested in incorporating stakeholder feedback into their own work
Confining properties of QCD at finite temperature and density
A disorder parameter detecting dual superconductivty of the vacuum is used as
a probe to characterize the confining properties of the phase diagram of two
color QCD at finite temperature and density. We obtain evidence for the
disappearing of dual superconductivity (deconfinement) induced by a finite
density of baryonic matter, as well as for a coincidence of this phenomenon
with the restoration of chiral symmetry both at zero and finite density. The
saturation transition induced by Pauli blocking is studied as well, and a
general warning is given about the possible effects that this unphysical
transition could have on the study of the QCD phase diagram at strong values of
the gauge coupling.Comment: 13 pages, 23 figure
Earthquakeâinduced landslide scenarios for seismic microzonation. Application to the Accumoli area (Rieti, Italy)
Scenarios of earthquake-induced landslides are necessary for seismic microzonation (SM) studies since they must be integrated with the mapping of instability areas. The PARSIFAL (Probabilistic Approach to pRovide Scenarios of earthquakeâInduced slope FAiLures) approach provides extensive analyses, over tens to thousands of square kilometers, and is designed as a fully comprehensive methodology to output expected scenarios which depend on seismic input and saturation conditions. This allows to attribute a rating, in terms of severity level, to the landslide-prone slope areas in view of future engineering studies and designs. PARSIFAL takes into account first-time rock- and earth-slides as well as re-activations of existing landslides performing slope stability analyses of different failure mechanisms. The results consist of mapping earthquake-induced landslide scenarios in terms of exceedance probability of critical threshold values of co-seismic displacements (P[Dâ„Dc|a(t),ay]). PARSIFAL was applied in the framework of level 3 SM studies over the municipality area of Accumoli (Rieti, Italy), strongly struck by the 2016 seismic sequence of Central Apennines. The use of the PARSIFAL was tested for the first time to screen the Susceptibility Zones (ZSFR) from the Attention Zones (ZAFR) in the category of the unstable areas, according to the guidelines by Italian Civil Protection. The results obtained were in a GIS-based mapping representing the possibility for a landslide to be induced by an earthquake (with a return period of 475 years) in three different saturation scenarios (i.e. dry, average, full). Only 41% of the landslide-prone areas in the Municipality of Accumoli are existing events, while the remaining 59% is characterized by first-time earth- or rock-slides. In dry conditions, unstable conditions or P[Dâ„Dc|a(t),ay]>0 were for 54% of existing landslides, 17% of first-time rock-slides and 1% of first-time earth- slides. In full saturation conditions, the findings are much more severe since unstable conditions or P[Dâ„Dc|a(t),ay]>0 were found for 58% of the existing landslides and for more than 80% of first-time rock- and earth-slides. Moreover, comparison of the total area of the ZAFR versus ZSFR, resulted in PARSIFAL screening reducing of 22% of the mapped ZAFR
Quantum measurement of a mesoscopic spin ensemble
We describe a method for precise estimation of the polarization of a
mesoscopic spin ensemble by using its coupling to a single two-level system.
Our approach requires a minimal number of measurements on the two-level system
for a given measurement precision. We consider the application of this method
to the case of nuclear spin ensemble defined by a single electron-charged
quantum dot: we show that decreasing the electron spin dephasing due to nuclei
and increasing the fidelity of nuclear-spin-based quantum memory could be
within the reach of present day experiments.Comment: 8 pages, 2 figures; minor changes, published versio
Draft Genome Sequence of Streptomyces sp. Strain JV178, a Producer of Clifednamide-Type Polycyclic Tetramate Macrolactams
Here, we report the draft genome sequence of Streptomyces sp. JV178, a strain originating from Connecticut (USA) garden soil. This strain produces the polycyclic tetramate macrolactam compounds clifednamides A and B. The draft genome contains 10.65 Mb, 9,045 predicted protein coding sequences, and several natural product biosynthetic loci
AGENDA-SETTING, PROGRESS AND CHALLENGES FOR ENVIRONMENTAL POLICY TRANSFER IN THE GULF COOPERATION COUNCIL
This study analyzes policy convergence and coordination in policymaking for sustainability, taking place in the context of Gulf Cooperation Council (GCC). It explores the policy choices of GCC countries in relation to agenda-setting, policy learning, policy convergence and coordination as a case of South-South transfer in the Middle East region, which is a relatively understudied aspect of the intensive diversification efforts of Gulf States. The study concludes that limited regional integration among GCC countries makes their relations more difficult. Individual national interests are prioritized over regional policy transfer and convergence. Moreover, some members choose to position closer to Western and Global perspective on development agenda. Consequently, they are keener to adopt environmental policies
Mapping tropical forest aboveground biomass using airborne SAR tomography
Ramachandran, N.; Department of Civil Engineering, India; email: [email protected] Researc
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