6,810 research outputs found
Number of Irreducible Polynomials and Pairs of Relatively Prime Polynomials in Several Variables over Finite Fields
We discuss several enumerative results for irreducible polynomials of a given
degree and pairs of relatively prime polynomials of given degrees in several
variables over finite fields. Two notions of degree, the {\em total degree} and
the {\em vector degree}, are considered. We show that the number of
irreducibles can be computed recursively by degree and that the number of
relatively prime pairs can be expressed in terms of the number of irreducibles.
We also obtain asymptotic formulas for the number of irreducibles and the
number of relatively prime pairs. The asymptotic formulas for the number of
irreducibles generalize and improve several previous results by Carlitz, Cohen
and Bodin.Comment: 33 page
Broadband microwave waveguide window Patent
Broadband microwave waveguide window to compensate dielectric material fillin
Finite element formulation for transient heat treat problems
The macrothermomechanical behavior of materials subjected to rapid thermal or mechanical loading such as occurs in most heat treatments is described. The equations are developed for Lagrangian, Eulerian, and intermediary kinematic descriptions and are independent of the constitutive laws and the equation of state; they can be solved numerically for a specified material and boundary conditions. The coupled transport effects between dissipation and energy are included. The conventional linearized stability approach indicates the numerical procedure to be stable, with certain restriction on the time step size
Analysis of the transient behavior of rubbing components
Finite element equations are developed for studying deformations and temperatures resulting from frictional heating in sliding system. The formulation is done for linear steady state motion in two dimensions. The equations include the effect of the velocity on the moving components. This gives spurious oscillations in their solutions by Galerkin finite element methods. A method called streamline upwind scheme is used to try to deal with this deficiency. The finite element program is then used to investigate the friction of heating in gas path seal
Mm-wave power meter mount
E-band thermistor mount and a technique for adjusting a temperature compensating thermistor to provide an electrically balanced bridge are used for measuring RF power in the mm-wavelength. The mount is relatively insensitive to temperature effects that cause measurement errors in single ended circuits
Matched Thermistors for Microwave Power Meters-Patent
Matched thermistors for microwave power meters with compensation for temperature change
Discrete logarithms in curves over finite fields
A survey on algorithms for computing discrete logarithms in Jacobians of
curves over finite fields
Nonparametric measures of the impact of public research expenditures on Australian broadacre agriculture
Nonparametric methods are used to measure the impact of public research expenditures on Australian broadacre agriculture over the 1953–94 period. Results using both unrestricted and 30‐year lagged specifications of the research impacts on productivity suggest that while certain aspects of the nonparametric multi‐input/output technologies are quite robust to alternative specifications (in particular, the associated Malmquist total factor productivity indexes), other aspects are less stable (in particular, the indexes on input and, to a lesser extent, output biased technical change). Internal rates of return to research expenditures on Australian broadacre agriculture are estimated to be in the 12 per cent to 20 per cent range.Crop Production/Industries, Research and Development/Tech Change/Emerging Technologies,
What are the effects of the COVID-19 pandemic on the development of children with special educational needs and disabilities from parents’ experiences? An integrative review
The COVID-19 pandemic led the United Kingdom (UK) into a national lockdown in March 2020. The UK government has acknowledged that children and young people (CYP) with Special Educational Needs and Disabilities (SEND) were left behind during the pandemic. This integrative literature review aims to investigate the effects of the COVID-19 pandemic on the development of CYP with SEND from parents’ experiences. The review included 14 papers: quantitative, qualitative and mixed methods. Parents’ experience of the COVID-19 pandemic was mostly negative; CYP were left behind, experienced reduced or suspended services, and loss of social interactions and support networks. However, a few parents reported some positive effects; families could spend more time together, and children experienced reduced anxiety as strict routines were relaxed. Most papers identified were completed during or just after the first lockdown. Therefore, none of the papers included whether CYP’s development has been affected in the longer term
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