Daniel Parshall

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The RaPiD project at the University of Washington has been studying configurable computing architectures optimized for coarse-grained data and computation units and deep computation pipelines. This research targets applications in the signal and image-processing domain since they make the greatest demand for computation and power in embedded and mobile(More)
We apply the techniques of digital holography to obtain microscopic three-dimensional images of biological cells. The optical system is capable of microscopic holography with diffraction-limited resolution by projecting a magnified image of a microscopic hologram plane onto a CCD plane. Two-wavelength phase-imaging digital holography is applied to produce(More)
Inelastic neutron scattering measurements on single crystals of superconducting BaFe1.84Co0.16As2 reveal a magnetic excitation located at wave vectors (1/2 1/2 L) in tetragonal notation. On cooling below T_{C}, a clear resonance peak is observed at this wave vector with an energy of 8.6(0.5) meV, corresponding to 4.5(0.3) k_{B}T_{C}. This is in good(More)
The insulator-to-metal transition continues to be a challenging subject, especially when electronic correlations are strong. In layered compounds, such as La2-xSrxNiO4 and La2-xBaxCuO4, the doped charge carriers can segregate into periodically spaced charge stripes separating narrow domains of antiferromagnetic order. Although there have been theoretical(More)
Nematic order is ubiquitous in liquid crystals and is characterized by a rotational symmetry breaking in an otherwise uniform liquid. Recently a similar phenomenon has been observed in some electronic phases of quantum materials related to high temperature superconductivity, particularly in the Fe-based superconductors. While several experiments have probed(More)
The RaPiD project at the University of Washington has been studying configurable computing architectures that are based on coarse-grained data and computation units. We have chosen signal and image processing as our target domain since they comprise a large part of the computation and power demand in embedded and mobile computing applications, and these(More)
In this paper we describe the design and use of a web-based tool that enables teachers to create integrated online workspaces for collaborative case-based and problem-based learning. We discuss how this tool has been used in a variety of ways other than those originally intended by the designers. We discuss our classroom-based studies of two of these uses,(More)
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