Green River Ordinances : Where Does the Burden Belong?

Over the years, many communities have attempted to restrict door-to-door salespersons. Green River Ordinance is a term derived from an ordinance adopted in Green River, Wyoming, in November, 1931. The measure declared the practice of going in or upon private residences for the purpose of peddling, or soliciting orders for the sale of goods without prior consent of the owners or occupants of the residence a nuisance and subjected such activities to criminal penalties. The popularity of, and controversy over, these ordinances continue to this day

Green River Ordinances : Where Does the Burden Belong?

Over the years, many communities have attempted to restrict door-to-door salespersons. Green River Ordinance is a term derived from an ordinance adopted in Green River, Wyoming, in November, 1931. The measure declared the practice of going in or upon private residences for the purpose of peddling, or soliciting orders for the sale of goods without prior consent of the owners or occupants of the residence a nuisance and subjected such activities to criminal penalties. The popularity of, and controversy over, these ordinances continue to this day

The Working in Health Access Programme (WHAP): impact on school leaving exam results and applications to Medicine

Introduction: Pupils from backgrounds wit socio-economic deprivation are less likely to apply to study medicine than those from more affluent backgrounds. It is unclear whether those who might have the potential to be doctors can be identified at a time when they can be exposedto awareness raising activities to enhance their likelihood of success. Methods: Sixty nine schools from all parts of Scotland with below average participation rates in Higher Education took part. More than 2000 pupils sat tests of cognitive ability (Mill Hill Vocabulary Scale and Raven’s Progressive Matrices) as well as non-cognitive tests assessing characteristics that could influence success as a doctor. Results: The results of the cognitive tests correlated closely with Standard Grade Examinations (sat in Year 11) and less so with Highers (sat in Year 12). The numbers applying to and being admitted to Medicine rose 80% and 300% respectively over the duration of the project. Those receiving an offer differed in personality from those who didn’t. Discussion: Widening Participation activities of the type used in our project successfully increased application and offers for Medicine. The value of psychometric tests in the context of Widening Participation requires further research

The Dynamics of 1D Quantum Spin Systems Can Be Approximated Efficiently

In this Letter we show that an arbitrarily good approximation to the propagator e^{itH} for a 1D lattice of n quantum spins with hamiltonian H may be obtained with polynomial computational resources in n and the error \epsilon, and exponential resources in |t|. Our proof makes use of the finitely correlated state/matrix product state formalism exploited by numerical renormalisation group algorithms like the density matrix renormalisation group. There are two immediate consequences of this result. The first is that the Vidal's time-dependent density matrix renormalisation group will require only polynomial resources to simulate 1D quantum spin systems for logarithmic |t|. The second consequence is that continuous-time 1D quantum circuits with logarithmic |t| can be simulated efficiently on a classical computer, despite the fact that, after discretisation, such circuits are of polynomial depth.Comment: 4 pages, 2 figures. Simplified argumen

Numerical simulation of neutron radiation effects in avalanche photodiodes

A new one-dimensional (1-D) device model developed for the simulation of neutron radiation effects in silicon avalanche photodiodes is described. The model uses a finite difference technique to solve the time-independent semiconductor equations across a user specified structure. The model includes impact ionization and illumination allowing accurate simulation with minimal assumptions. The effect of neutron radiation damage is incorporated via the introduction of deep acceptor levels subject to Shockley-Read-Hall statistics. Preliminary analysis of an EG&G reverse APD structure is compared with experimental data from a commercial EG&G C30719F APD