8,460 research outputs found
Rural soldiers continue to account for disproportionately high share of U.S. casualties in Iraq and Afghanistan
When the nation goes to war, all Americans are expected to make sacrifices. Today\u27s rural Americans, however, have fewer job opportunities within their communities, and are joining the military at higher rates. In turn, rural communities are facing military losses in disproportionate numbers to their urban counterparts
U.S. rural soldiers account for a disproportionately high share of casualties in Iraq and Afghanistan
A study by the Carsey Institute found that among U.S. soldiers serving in Iraq and Afghanistan, those who are from rural America are dying at a higher rate than those soldiers who are from cities and suburbs. According to U.S. Department of Defense records, rural youth enlist in the military at a higher rate than urban and suburban youth and in all but eight states, soldiers from rural areas make up a disproportionately high share of the casualties
Broadband choke for antenna structure
Broadband chokes and absorbers to reduce spurious radiation patterns of antenna array caused by support structure
Recommended from our members
Stepwise Development and Verification of a Boiler System Specification
Buoyancy and thermal radiation effects for the Blasius and Sakiadis flows with a convective surface boundary condition
This study is devoted to investigate the Buoyancy and thermal radiation effects on the laminar boundary layer about a flat-plate in a uniform stream of fluid (Blasius flow), and about a moving plate in a quiescent ambient fluid (Sakiadis flow) both under a convective surface boundary condition. Using a similarity variable, the governing nonlinear partial differential equations have been transformed into a set of coupled nonlinear ordinary differential equations, which are solved numerically by using shooting technique along side with the sixth order of Runge-Kutta integration scheme and the variations of dimensionless surface temperature and fluid-solid interface characteristics for different values of Prandtl number Pr, radiation parameter NR, parameter a and the local Grashof number Grx, which characterizes our convection processes are graphed and tabulated. Quite different and interesting behaviours were encountered for Blasius flow compared with a Sakiadis flow. A comparison with previously published results on special cases of the problem shows excellent agreement
Frustrated spin- Heisenberg magnet on a square-lattice bilayer: High-order study of the quantum critical behavior of the ---- model
The zero-temperature phase diagram of the spin-
---- model on an -stacked square-lattice
bilayer is studied using the coupled cluster method implemented to very high
orders. Both nearest-neighbor (NN) and frustrating next-nearest-neighbor
Heisenberg exchange interactions, of strengths and , respectively, are included in each layer. The two layers are
coupled via a NN interlayer Heisenberg exchange interaction with a strength
. The magnetic order parameter (viz.,
the sublattice magnetization) is calculated directly in the thermodynamic
(infinite-lattice) limit for the two cases when both layers have
antiferromagnetic ordering of either the N\'{e}el or the striped kind, and with
the layers coupled so that NN spins between them are either parallel (when
) to one another. Calculations
are performed at th order in a well-defined sequence of approximations,
which exactly preserve both the Goldstone linked cluster theorem and the
Hellmann-Feynman theorem, with . The sole approximation made is to
extrapolate such sequences of th-order results for to the exact limit,
. By thus locating the points where vanishes, we calculate
the full phase boundaries of the two collinear AFM phases in the
-- half-plane with . In particular, we provide the
accurate estimate, (), for the
position of the quantum triple point (QTP) in the region . We also
show that there is no counterpart of such a QTP in the region ,
where the two quasiclassical phase boundaries show instead an ``avoided
crossing'' behavior, such that the entire region that contains the nonclassical
paramagnetic phases is singly connected
Social and Economic Challenges of Small Scale Arable Farming in Delta Central Agricultural Zone, Delta State, Nigeria
The broad objective of the study was to investigate the interactions between socio-economic challenges and types of small scale arable farming. Simple random sampling technique was used to compose the sample. The sample was made up of 91 arable farmers. Data were analysed by use of percentage, mean, Pearson Chi square test, t test and multiple regression. The types of small scale arable farming identified in the study area were subsistence, commercial/subsistence and commercial. The social factors which influenced types of arable farming were level of education (M = 3.36) and land tenure system (M = 3.36) while the economic factors were credit facilities (M = 3.63), lack of ready market/storage facilities (M = 2.68) and long investment period compared to quick returns on investment like trading (M = 2.63).. An R2 value (0.907) showed that there was a significant relationship between farm size and selected socio-economic characteristics. There was a significant and negative relationship between farm size and response to land tenure constraints ( t = -27.243, p = 0.000). There was significant relationship between types of small scale arable farming and social factors (X 2 =29.92, p = 0.008), and economic factors (X 2 =75.54, p = 0.000). Extension education, credit facilities, and ready markets should be provided to farmers to enable them purchase more land and other inputs for the purpose of expanding the scale of arable farming in the zone. Keywords: Small scale arable farmers, challenges, types of arable farming, farm siz
- …