6,409 research outputs found
Poultry Disease Problems in South Dakota
This report details various diseases affecting South Dakota poultry
Salmonella and E. Coli Control
This document provides information regarding salmonella and E. coli in poultry
Salmonella in Livestock
Salmonella in livestock discusses what salmonella are and why they are important. Addressed are sources of infection, prevention and treatment, and precautions for human food products. Included is information on the disease in swine, cattle, poultry, and other animals
Listening to care experienced young people and creating audio-bites for social work education
It can be challenging to incorporate young people’s voices into social work pedagogy even though service user involvement is an essential part of social work education. Technological advances present new ways to involve service users and overcome barriers to participation. The purpose of this research was to explore service user involvement amongst young people by developing an audio resource for a qualifying social work programme in Scotland. We used a co-production methodology to create eight audio-bites based on interviews with four care-experienced people, aged 14–19, about their involvement with social work. We share key findings from the interviews, about the young people’s involvement with social work and about being ‘subjects’ of statutory recording practices and processes, such as chronologies and Child’s Plans. We discuss how the audio-bites were used in teaching and present feedback from students and lecturers about their use. We argue that the audio-bites promote authentic learning as they depict real life practice situations, and help students to develop listening and reflection skills that will inform their preparation for practice with children and young people
A hybrid quantum algorithm to detect conical intersections
Conical intersections are topologically protected crossings between the
potential energy surfaces of a molecular Hamiltonian, known to play an
important role in chemical processes such as photoisomerization and
non-radiative relaxation. They are characterized by a non-zero Berry phase,
which is a topological invariant defined on a closed path in atomic coordinate
space, taking the value when the path encircles the intersection
manifold. In this work, we show that for real molecular Hamiltonians, the Berry
phase can be obtained by tracing a local optimum of a variational ansatz along
the chosen path and estimating the overlap between the initial and final state
with a control-free Hadamard test. Moreover, by discretizing the path into
points, we can use single Newton-Raphson steps to update our state
non-variationally. Finally, since the Berry phase can only take two discrete
values (0 or ), our procedure succeeds even for a cumulative error bounded
by a constant; this allows us to bound the total sampling cost and to readily
verify the success of the procedure. We demonstrate numerically the application
of our algorithm on small toy models of the formaldimine molecule
(\ce{H2C=NH}).Comment: 15 + 10 pages, 4 figure
A state-averaged orbital-optimized hybrid quantum-classical algorithm for a democratic description of ground and excited states
In the Noisy Intermediate-Scale Quantum (NISQ) era, solving the electronic
structure problem from chemistry is considered as the "killer application" for
near-term quantum devices. In spite of the success of variational hybrid
quantum/classical algorithms in providing accurate energy profiles for small
molecules, careful considerations are still required for the description of
complicated features of potential energy surfaces. Because the current quantum
resources are very limited, it is common to focus on a restricted part of the
Hilbert space (determined by the set of active orbitals). While physically
motivated, this approximation can severely impact the description of these
complicated features. A perfect example is that of conical intersections (i.e.
a singular point of degeneracy between electronic states), which are of primary
importance to understand many prominent reactions. Designing active spaces so
that the improved accuracy from a quantum computer is not rendered useless is
key to finding useful applications of these promising devices within the field
of chemistry. To answer this issue, we introduce a NISQ-friendly method called
"State-Averaged Orbital-Optimized Variational Quantum Eigensolver" (SA-OO-VQE)
which combines two algorithms: (1) a state-averaged orbital-optimizer, and (2)
a state-averaged VQE. To demonstrate the success of the method, we classically
simulate it on a minimal Schiff base model (namely the formaldimine molecule
CH2NH) relevant also for the photoisomerization in rhodopsin -- a crucial step
in the process of vision mediated by the presence of a conical intersection. We
show that merging both algorithms fulfil the necessary condition to describe
the molecule's conical intersection, i.e. the ability to treat degenerate (or
quasi-degenerate) states on the same footing.Comment: 18 pages, 7 figure
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