9,599 research outputs found
Many New Hampshire Jobs Do Not Pay a Livable Wage
Two forces are likely to have the greatest impact on the projected availability of livable wage jobs in coming years. The first is the course of the current economic downturn. Table 11 shows the New England Economic Partnership (NEE P) forecast for New Hampshire's unemployment rate from 2008 to 2012. As the table shows, unemployment is projected to increase from 3.7 percent in 2007 to 4.2 percent in 2009, after which it is projected to gradually fall. The latest NEE P forecast predicted a relatively mild economic contraction, which provides some reason for optimism among New Hampshire workers. However, any optimism should be tempered by the fact that the latest forecast was issued before the dramatic stock market decline and at the beginning of the financial crisis.The second major factor impacting the availability of livable wage jobs is the changing composition of New Hampshire's economic base. Between 2000 and 2007, New Hampshire lost 25,400 manufacturing jobs, representing a 25 percent decline in the industry.10 Over the same period, jobs in education, healthcare, retail trade, and leisure and hospitality grew by about the same number of jobs. To the extent New Hampshire continues in this transition from a production-based to a service-based economy, the proportion of livable wage jobs is expected to decline
Pattern densities in fluid dimer models
In this paper, we introduce a family of observables for the dimer model on a
bi-periodic bipartite planar graph, called pattern density fields. We study the
scaling limit of these objects for liquid and gaseous Gibbs measures of the
dimer model, and prove that they converge to a linear combination of a
derivative of the Gaussian massless free field and an independent white noise.Comment: 38 pages, 3 figure
Dimers and cluster integrable systems
We show that the dimer model on a bipartite graph on a torus gives rise to a
quantum integrable system of special type - a cluster integrable system. The
phase space of the classical system contains, as an open dense subset, the
moduli space of line bundles with connections on the graph. The sum of
Hamiltonians is essentially the partition function of the dimer model. Any
graph on a torus gives rise to a bipartite graph on the torus. We show that the
phase space of the latter has a Lagrangian subvariety. We identify it with the
space parametrizing resistor networks on the original graph.We construct
several discrete quantum integrable systems.Comment: This is an updated version, 75 pages, which will appear in Ann. Sci.
EN
Terrestrial Planet Formation I. The Transition from Oligarchic Growth to Chaotic Growth
We use a hybrid, multiannulus, n-body-coagulation code to investigate the
growth of km-sized planetesimals at 0.4-2 AU around a solar-type star. After a
short runaway growth phase, protoplanets with masses of roughly 10^26 g and
larger form throughout the grid. When (i) the mass in these `oligarchs' is
roughly comparable to the mass in planetesimals and (ii) the surface density in
oligarchs exceeds 2-3 g/sq cm at 1 AU, strong dynamical interactions among
oligarchs produce a high merger rate which leads to the formation of several
terrestrial planets. In disks with lower surface density, milder interactions
produce several lower mass planets. In all disks, the planet formation
timescale is roughly 10-100 Myr, similar to estimates derived from the
cratering record and radiometric data.Comment: Astronomical Journal, accepted; 22 pages + 15 figures in ps format;
eps figures at http://cfa-www.harvard.edu/~kenyon/dl/ revised version
clarifies evolution and justifies choice of promotion masse
Forming the Dusty Ring in HR 4796A
We describe planetesimal accretion calculations for the dusty ring observed
in the nearby A0 star HR 4796A. Models with initial masses of 10-20 times the
minimum mass solar nebula produce a ring of width 7-15 AU and height 0.3-0.6 AU
at 70 AU in roughly 10 Myr. The ring has a radial optical depth of 1. These
results agree with limits derived from infrared images and from the excess
infrared luminosity.Comment: 6 pages, including 2 figures and 1 table; ApJ Letters, in pres
A Study of Proton Induced Effects on Reflective Surfaces of Space Mirrors
Proton radiation effects at synchronous earth orbits on telescope mirror reflective surfaces and substrate
Exploring the festival lived experience: A basis for social marketing interventions promoting responsible alcohol consumption
Policy interventions and social marketing campaigns to educate young adults of the risks associated with excessive amounts of alcohol have gained momentum. Yet many young adults engage in risky drinking behavior; especially at hedonic social gatherings. The authors affirm there has been growth in music festivals yet the relationship with alcohol, the shared emotional experience and the increased promotion of alcohol through this vehicle is limited. Therefore, we explore this phenomena using real-time data from festival attendees through experience sampling (ESM), photo-elicitation techniques and post-festival qualitative expositional interviews to inform and guide policy initiatives. The findings show that extreme drinking is considered an essential part of the festival experience, is encouraged by peers and not discouraged by the festival organisers or alcohol brands. However, of greater importance is the evidence of self-reguation and a clear understanding of the dangers of ‘over’ consumption. It is recommended that public policy makers regulate music festivals in terms of alcohol sponsorhip and that social marketing campaigns harness ‘camaraderie-style’ approaches as collective influence and peer pressure has great potential to change alcohol behavior in a positive way
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