Professor Stuart H. Gage Remote Environmental Assessment Laboratory Michigan State University 1405 S. Harrison Road Manly Miles Bldg. Rm 101 East Lansing, Michigan 48823 Tel: 517-355-2135 Fax: 517-355-0186 Email: [email protected] Eric P. Kasten, Ph.D. Remote Environmental Assessment Laboratory Michigan State University 1405 S. Harrison Road Manly Miles Bldg. Rm 101 East Lansing, Michigan 48823 Tel...

We present an overview of the National Institute of Standards and Technology high temperature blackbodies, both in operation and in development, suitable for heat-flux sensor calibration. Typical results of calibrations using the transfer technique in the 25 mm Variable-Temperature Blackbody are presented to demonstrate the long-term repeatability of the calibration technique. A comparative stu...

we introduce center-like subsets z*(r,f), z**(r,f) and z1(r,f), where r is a ring and f is a map from r to r. for f a derivation or a non-identity epimorphism and r a suitably-chosen prime or semiprime ring, we prove that these sets coincide with the center of r.

for an arbitrary ring $r$, the zero-divisor graph of $r$, denoted by $gamma (r)$, is an undirected simple graph that its vertices are all nonzero zero-divisors of $r$ in which any two vertices $x$ and $y$ are adjacent if and only if either $xy=0$ or $yx=0$. it is well-known that for any commutative ring $r$, $gamma (r) cong gamma (t(r))$ where $t(r)$ is the (total) quotient ring of $r$. in this...

let r be a prime ring with extended centroid c, h a generalized derivation of r and n ⩾ 1 a xed integer. in this paper we study the situations: (1) if (h(xy))n = (h(x))n(h(y))n for all x; y 2 r; (2) obtain some related result in case r is a noncommutative banach algebra and h is continuous or spectrally bounded.

a ring $r$ is a strongly clean ring if every element in $r$ is the sum of an idempotent and a unit that commutate. we construct some classes of strongly clean rings which have stable range one. it is shown that such cleanness of $2 imes 2$ matrices over commutative local rings is completely determined in terms of solvability of quadratic equations.

L’étude sur la surveillance électorale en République Démocratique du Congo (RDC), notamment, a mis exergue l’impact de cette pratique légitimité des institutions issues élections, d’une part, et, d’autre les réformes éventuellement envisagées. Pour ce qui est légitimité, elle noté que celle-ci un gage promotion l’Etat droit.

Fiber optic Bragg gratings packaged in long gage configurations are being used to measure static and dynamic macro-strains in structures and structural models to monitor structural health and detect and identify macrodamage incurred from a seismic event. These long gage sensors are being used to experimentally verify analytical models of small-scale structural models in their preand post-damage...

An indicator variable was developed that may be used to visualize and detect bi–directionality in wind tunnel strain–gage balance calibration data. First, the calculation of the indicator variable is explained in detail. Then, an empirical criterion is proposed that may be used to decide which load components of a balance have bi–directional behavior. The criterion could be used, for example, t...