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- Jason Horn, David E. Root, Gary Simpson
- 2010 IEEE Compound Semiconductor Integrated…
- 2010

Arbitrary-load-dependent X-parameters, automatically measured with a load-tuner working with an NVNA, are used to characterize and model a packaged 10W GaN transistor. A full nonlinear two-port functional block model for PA and other circuit design is immediately available for nonlinear simulation. It is demonstrated that the model predicts well the… (More)

An outstanding problem in Earth science is understanding the method of transport of magma in the Earth's mantle. Two proposed methods for this transport are percolation through porous rock and flow up conduits. Under reasonable assumptions and simplifications, both means of transport can be described by a class of degenerate nonlinear dispersive partial… (More)

- G Simpson, Canada, M Spiegelman, M I Weinstein
- 2009

In a companion paper, equations for partially molten media 9 were derived using two-scale homogenization theory. One advantage of ho-10 mogenization is that material properties, such as permeability and viscos-11 ity, readily emerge. A caveat is that the dependence of these parameters upon 12 the microstructure is not self-evident. In particular, one seeks… (More)

—IV knee walkout in AlGaN/GaN high electron mobility transistors (HEMTs) on a Sapphire substrate is analyzed using dynamic radio frequency (RF) load-lines acquired with a large signal network analyzer (LSNA) for both continuous-wave (CW) and pulsed-IV/RF excitations. When thermal effects and traps are bypassed using pulsed-IV biasing and pulsed-RF… (More)

- G Simpson, Canada, M Spiegelman, M I Weinstein
- 2009

In this paper a model for partial melts is constructed using 10 two-scale homogenization theory. While this technique is well known to the 11 mathematics and materials communities, it is relatively novel to problems 12 in the solid Earth. This approach begins with a grain scale model of the medium, 13 coarsening it into a macroscopic one. The emergent model… (More)

- G Lorusso, S Nishimura, +52 authors K Yoshinaga
- Physical review letters
- 2015

The β-decay half-lives of 110 neutron-rich isotopes of the elements from _{37}Rb to _{50}Sn were measured at the Radioactive Isotope Beam Factory. The 40 new half-lives follow robust systematics and highlight the persistence of shell effects. The new data have direct implications for r-process calculations and reinforce the notion that the second (A≈130)… (More)

- A S Curry, G W Walker, G S Simpson
- The Analyst
- 1966

- MA URY M ICROWAV, Gary Simpson, David Ballo, Joel Dunsmore, Amar Ganwani
- 2009

- G S Simpson, G Gey, +48 authors A Wendt
- Physical review letters
- 2014

Delayed γ-ray cascades, originating from the decay of (6⁺) isomeric states, in the very neutron-rich, semimagic isotopes (136,138)Sn have been observed following the projectile fission of a ²³⁸U beam at RIBF, RIKEN. The wave functions of these isomeric states are proposed to be predominantly a fully aligned pair of f(7/2) neutrons. Shell-model calculations,… (More)

- C Sotty, M Zielińska, +27 authors F Wenander
- Physical review letters
- 2015