Digging Them Out Alive

From 2013-2018, we taught a collection of interrelated law and social work clinical courses, which we call “the Unger clinic.” This clinic was part of a major, multi-year criminal justice project, led by the Maryland Office of the Public Defender. The clinic and project responded to a need created by a 2012 Maryland Court of Appeals decision, Unger v. State. It, as later clarified, required that all Maryland prisoners who were convicted by juries before 1981—237 older, long-incarcerated prisoners—be given new trials. This was because prior to 1981 Maryland judges in criminal trials were required to instruct the jury that they—the jury—had the ultimate right to determine the law. Our clinic helped to implement Unger by providing a range of legal services and related social services to many of these prisoners. Through the five years, the great majority of the Unger group were released by agreements, on probation, and not retried. In all, approximately 85% of the 237—that is, 85% of all state prisoners in Maryland convicted by juries of violent crimes before 1981—were released. This article describes why and how we created the Unger Clinic; why we made it interdisciplinary; what the students and we learned in it and from our clients; and what we would do differently. We believe the clinical education model we developed—an interdisciplinary clinic working in partnership with a major legal services provider and a citizens’ advocacy group—can be used effectively to address other significant access-to-justice problems nationally. In the end, the Unger Project has been a criminal justice laboratory. The qualitative experiences support many criminal justice reforms with the overriding lesson being that the continued incarceration of older, long incarcerated prisoners convicted of violent crimes serves no public safety purpose

Robust estimation of bacterial cell count from optical density

Optical density (OD) is widely used to estimate the density of cells in liquid culture, but cannot be compared between instruments without a standardized calibration protocol and is challenging to relate to actual cell count. We address this with an interlaboratory study comparing three simple, low-cost, and highly accessible OD calibration protocols across 244 laboratories, applied to eight strains of constitutive GFP-expressing E. coli. Based on our results, we recommend calibrating OD to estimated cell count using serial dilution of silica microspheres, which produces highly precise calibration (95.5% of residuals <1.2-fold), is easily assessed for quality control, also assesses instrument effective linear range, and can be combined with fluorescence calibration to obtain units of Molecules of Equivalent Fluorescein (MEFL) per cell, allowing direct comparison and data fusion with flow cytometry measurements: in our study, fluorescence per cell measurements showed only a 1.07-fold mean difference between plate reader and flow cytometry data

Coronal Heating as Determined by the Solar Flare Frequency Distribution Obtained by Aggregating Case Studies

Flare frequency distributions represent a key approach to addressing one of the largest problems in solar and stellar physics: determining the mechanism that counter-intuitively heats coronae to temperatures that are orders of magnitude hotter than the corresponding photospheres. It is widely accepted that the magnetic field is responsible for the heating, but there are two competing mechanisms that could explain it: nanoflares or Alfv\'en waves. To date, neither can be directly observed. Nanoflares are, by definition, extremely small, but their aggregate energy release could represent a substantial heating mechanism, presuming they are sufficiently abundant. One way to test this presumption is via the flare frequency distribution, which describes how often flares of various energies occur. If the slope of the power law fitting the flare frequency distribution is above a critical threshold, $\alpha=2$ as established in prior literature, then there should be a sufficient abundance of nanoflares to explain coronal heating. We performed $>$600 case studies of solar flares, made possible by an unprecedented number of data analysts via three semesters of an undergraduate physics laboratory course. This allowed us to include two crucial, but nontrivial, analysis methods: pre-flare baseline subtraction and computation of the flare energy, which requires determining flare start and stop times. We aggregated the results of these analyses into a statistical study to determine that $\alpha = 1.63 \pm 0.03$. This is below the critical threshold, suggesting that Alfv\'en waves are an important driver of coronal heating.Comment: 1,002 authors, 14 pages, 4 figures, 3 tables, published by The Astrophysical Journal on 2023-05-09, volume 948, page 7