High resolution in-vivo MR-STAT using a matrix-free and parallelized reconstruction algorithm

MR-STAT is a recently proposed framework that allows the reconstruction of multiple quantitative parameter maps from a single short scan by performing spatial localisation and parameter estimation on the time domain data simultaneously, without relying on the FFT. To do this at high-resolution, specialized algorithms are required to solve the underlying large-scale non-linear optimisation problem. We propose a matrix-free and parallelized inexact Gauss-Newton based reconstruction algorithm for this purpose. The proposed algorithm is implemented on a high performance computing cluster and is demonstrated to be able to generate high-resolution ($1mm \times 1mm$ in-plane resolution) quantitative parameter maps in simulation, phantom and in-vivo brain experiments. Reconstructed $T_1$ and $T_2$ values for the gel phantoms are in agreement with results from gold standard measurements and for the in-vivo experiments the quantitative values show good agreement with literature values. In all experiments short pulse sequences with robust Cartesian sampling are used for which conventional MR Fingerprinting reconstructions are shown to fail.Comment: Accepted by NMR in Biomedicine on 2019-12-0

The Extrema-effect in Total Elastic Molecular Beam Scattering Cross Sections for Characterization of the Potential Well

Extrema effect in total elastic molecular beam scattering cross sections for characterization of potential wel

Feasibility model of an advanced crossed-field amplifier for space communication systems

Feasibility model of cross field amplifier for use in amplitude or frequency modulation transmitter

Auroral rocket experiment 2 Final report

Detecting fluxes of energetic neutral hydrogen atoms in interplanetary medium by auroral rocket flight

Monitoring the Thermal Power of Nuclear Reactors with a Prototype Cubic Meter Antineutrino Detector

In this paper, we estimate how quickly and how precisely a reactor's operational status and thermal power can be monitored over hour to month time scales, using the antineutrino rate as measured by a cubic meter scale detector. Our results are obtained from a detector we have deployed and operated at 25 meter standoff from a reactor core. This prototype can detect a prompt reactor shutdown within five hours, and monitor relative thermal power to three percent within seven days. Monitoring of short-term power changes in this way may be useful in the context of International Atomic Energy Agency's (IAEA) Reactor Safeguards Regime, or other cooperative monitoring regimes.Comment: 10 pages, 9 figure

A 100 micro Kelvin bolometer system for SIRTF

Progress toward a prototype of 100 mK bolometric detection system for the Space Infrared Telescope Facility (SIRTF) is described. Two adiabatic demagnetization refrigerators (ADR's) were constructed and used to investigate the capabilities necessary for orbital operation. The first, a laboratory ADR, demonstrated a hold time at 0.1 K of over 12 hours, with temperature stability approx. 3 micro-K RMS achieved by controlling the magnetic field. A durable salt pill and an efficient support system have been demonstrated. A second ADR, the SIRTF flight prototype, has been built and will be flown on a balloon. Techniques for magnetic shielding, low heat leak current leads, and a mechanical heat switch are being developed in this ADR. Plans for construction of 100 mK bolometers are discussed. Three important cosmological investigations which will be carried out by these longest wavelength SIRTF detectors are described

12/22/1978 Birthday Note

For more information on the Rosalyne S. Bernstein Papers, please visit the finding aid https://digitalcommons.usm.maine.edu/judaica_finding_aids/4/“\u3eHERE Brief note from Sumner T. Bernstein to Rosalyne S. Bernstein on the occasion of her 50th birthday.https://digitalcommons.usm.maine.edu/rbernstein_correspondence/1007/thumbnail.jp

08/05/1945

Letter to family from Sumner T. Bernstein regarding communication with school Veterans Counselor; correspondence. [fragment]https://digitalcommons.usm.maine.edu/sbernstein_correspondence/1065/thumbnail.jp

06/04/1945

Letter to family from Sumner T. Bernstein regarding Army\u27s plan for officer discharges; Bernsteins\u27 summer vacation home Menikoe; family news; Truman\u27s request for reorganization of the executive branch.https://digitalcommons.usm.maine.edu/sbernstein_correspondence/1004/thumbnail.jp

08/03/1945

Letter to family from Sumner T. Bernstein regarding mental state of returning veterans; Commander article on the presidency; Lerner article on Japan; Stark article on postwar American politics; Indian politics.https://digitalcommons.usm.maine.edu/sbernstein_correspondence/1092/thumbnail.jp