Discrimination of buried unexploded ordinance (UXO) from innocuous buried items remains a challenging, top priority problem for the electromagnetic induction (EMI) sensing community. In general, classification is an inverse problem, requiring very fast and accurate representation of the target response. To address this critical issue, this paper presents a very fast, rigorous way to compute EMI...

Two-dimensional numerical study of flow and temperature fields for laminar natural convection and radiation in the inclined cavity is performed in the present work. The walls of the square cavity are assumed kept at constant temperatures. An absorbing, emitting, and scattering gray medium is enclosed by the opaque and diffusely emitting walls. The set of governing equations, including conservat...

In the present work, an inverse analysis of combined radiation and laminar forced convection heat transfer in a two-dimensional channel with variable cross sections is performed. The conjugate gradient method is used to find the temperature distribution over the heater surface to satisfy the prescribed temperature and heat flux distributions over the design surface. The fluid is considered to b...

this work presents the heat transfer characteristics of a new type of porous radiant air heater that operates on the basis of effective energy conversion method between flowing gas enthalpy and thermal radiation. at each layer, the gas and solid phases are considered in non-local thermal equilibrium, and combustion in the porous radiant burner is modeled by considering a non-uniform heat genera...

The effect of UV beam, which has been emitted from a natural or a manmade source on cells has been studied in previous studies for several times. Radiation of this beam can have different effects on DNA of the cell, cytotoxicity, the structure of cellular proteins and their mechanical properties based on radiation period or frequency. The effect of radiation of two types of beams, namely UVB an...

Introduction The Hospital Authority (HA) is a statutory body that was established under the Hospital Authority Ordinance. It has managed public hospitals in Hong Kong since 1991. Hospitals in Hong Kong are divided into seven geographically based clusters. HA has designed a “Payfor-Performance (P4P) model” which includes incentives to promote productivity and quality. In the second year of this ...

Public policy can be an effective method of promoting public health and preventing disease in a population. The proposing and passing of a municipal ordinance regulating power-sanding of leaded paint in New Orleans is a policy-level intervention that implements a primary prevention measure to address a community-wide risk. The process of achieving policy change involves defining the problem and...

The theory of the discrete-dipole approximation (DDA) for light scattering is extended to allow for the calculation of radiation forces on each dipole in the DDA model. Starting with the theory of Draine and Weingartner [Astrophys. J. 470, 551 (1996)] we derive an expression for the radiation force on each dipole. These expressions are reformulated into discrete convolutions, allowing for an ef...

a nonstandard finite difference (nsfd) scheme has been constructed and analyzed for a mathematical model that describes lotka–volterra food web model. this new discrete system has the same stability properties as the continuous model and,on the whole, it preservesthe same local asymptotic stability properties. linearized stability theory and schur–cohn criteria are used for local asymptoticstab...

The U.S. Supreme Court struck down as unconstitutional an Akron, Ohio, ordinance regulating abortions because it interfered with a woman's right to obtain an abortion. The ordinance required that all abortions after the first trimester of pregnancy be performed in a hospital, prohibited physicians from performing abortions on unmarried minors under the age of 15 without parental consent or a c...