208 research outputs found
The survival of universities in contested territories: Findings from two roundtable discussions on institutions in the North West of Syria
This paper draws on discussions around
the future of higher education (HE) in Syria
after nearly a decade of violent conflict.
Focusing on universities in non-regime-controlled
areas, it illustrates the difficulties
of sector-wide planning and the provision
of institutional support during protracted
conflict in areas with no single state entity or
ministerial support
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SAVVIcode: Preventing mafia attacks on visual code authentication schemes (short paper)
More Than the Sum of Its Parts: Unlocking the Power of Network Structure for Understanding Organization and Function in Microbiomes
Plant and soil microbiomes are integral to the health and productivity of plants and ecosystems, yet researchers struggle to identify microbiome characteristics important for providing beneficial outcomes. Network analysis offers a shift in analytical framework beyond who is present to the organization or patterns of coexistence between microbes within the microbiome. Because microbial phenotypes are often significantly impacted by coexisting populations, patterns of coexistence within microbiomes are likely to be especially important in predicting functional outcomes. Here, we provide an overview of the how and why of network analysis in microbiome research, highlighting the ways in which network analyses have provided novel insights into microbiome organization and functional capacities, the diverse network roles of different microbial populations, and the eco-evolutionary dynamics of plant and soil microbiomes
Neutron scattering Measurements of the phonon density of states of FeSe superconductors
Inelastic neutron-scattering experiments have been carried out on
polycrystalline samples of the FeSe superconductors. We report the
phonon density of states for FeSe with Tc8 K. The phonon
cutoff frequency is observed around 40 meV. No significant change is observed
across the superconducting transition. The measurements support the published
first-principles calculations [A. Subedi et al., Phys. Rev. B \textbf{78},
134514 (2008)].Comment: new version with change
Robust and Deterministic Preparation of Bosonic Logical States in a Trapped Ion
Encoding logical qubits in bosonic modes provides a potentially
hardware-efficient implementation of fault-tolerant quantum information
processing. Recent advancements in trapped ions and superconducting microwave
cavities have led to experimental realizations of high-quality bosonic states
and demonstrations of error-corrected logical qubits encoded in bosonic modes.
However, current protocols for preparing bosonic code words lack robustness to
common noise sources and can be experimentally challenging to implement,
limiting the quality and breadth of codes that have been realized to date.
Here, we combine concepts of error suppression via robust control with quantum
error correction encoding and experimentally demonstrate high-fidelity,
deterministic preparation of highly non-classical target bosonic states in the
mechanical motion of a trapped ion. Our approach implements numerically
optimized dynamical modulation of laser-driven spin-motion interactions to
generate the target state in a single step. The optimized control pulses are
tailored towards experimental constraints and are designed to be robust against
the dominant source of error. Using these protocols, we demonstrate logical
fidelities for the Gottesman-Kitaev-Preskill (GKP) state as high as
, achieve the first realization of a distance-3
binomial logical state with an average fidelity of , and
demonstrate a 12.91(5) dB squeezed vacuum state.Comment: 12 pages, 8 figure
THE STRUCTURE OF 3,5-DI-O-BENZOYL-1,2-DIDEOXY-1-PHENYL-BETA-D-RIBOFURANOSE, C25H22O5
Mr=402.4, orthorhombic, P212~2 l, a=
4-946 (1), b= 15.887 (2), c=26.555 (2)A, V=
2086.7 (5) A 3, Z = 4, D x = 1.28 gcm -a, Cu Ka, 2 =
1.5418/k, B = 6.868 cm -1, F(000) = 848, T= 293 K,
final R =0.054 for 648 observed reflections. The
molecule is propeller shaped. The benzoyl groups act as
protecting groups and the phenyl group is a base
substitute. The crystal structure does not involve any
intermolecular stacking interactions between the phenyl
groups. The molecules pack in typical herring-bone-like
arrays. The sugar has a fl-D configuration with
C(2')-endo-C(3')-exo pucker (2T3), pseudorotation
angle P = 172 (2) °, degree of pucker r m = 39 (2) °
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