Wilderness Law in the Anthropocene: Purism or Pragmatism

Wilderness is vanishing. Despite explicit legislative protection of wilderness values for over half a century, rapid environmental degradation worldwide in recent decades has severely diminished the extent and quality of terrestrial and marine wilderness to the point where we must reassess the fundamental premises and future of wilderness law. With increased human demands on the natural world, and with climate breakdown looming, the very notion of “wilderness” itself may one day be considered meaningless or irrelevant. We examine legal developments in the United States, Australia, and Europe to critically evaluate the state of wilderness law. In this Anthropocene era, when humans control so much of Earth’s resources, we examine whether the law should aim for a “purist” approach, in which wilderness areas are simply left untouched, or a “pragmatic”‘ approach, in which wilderness is actively managed to maintain its cherished values in the face of mounting adversity. A variety of intermediary positions are conceivable between these endpoints, and the best approach to wilderness management will likely depend on several considerations including who or what “wilderness” is meant to serve, the geographic and biological features of the landscape, environmental threats the area faces, the presence of Indigenous or other local communities, and the values that the guiding law means to serve. We offer recommendations to improve wilderness law to navigate the Anthropocene. We suggest proceeding with care and humility, staying as close to purism as possible, while acknowledging that sometimes we must take a pragmatic approach and intervene to preserve the wilderness qualities our laws are designed to protec

Significant improvements in long trace profiler measurement performance

A Modifications made to the Long Trace Profiler (LTP II) system at the Advanced Photon Source at Argonne National Laboratory have significantly improved the accuracy and repeatability of the instrument The use of a Dove prism in the reference beam path corrects for phasing problems between mechanical efforts and thermally-induced system errors. A single reference correction now completely removes both error signals from the measured surface profile. The addition of a precision air conditioner keeps the temperature in the metrology enclosure constant to within {+-}0.1{degrees}C over a 24 hour period and has significantly improved the stability and repeatability of the system. We illustrate the performance improvements with several sets of measurements. The improved environmental control has reduced thermal drift error to about 0.75 microradian RMS over a 7.5 hour time period. Measurements made in the forward scan direction and the reverse scan direction differ by only about 0.5 microradian RMS over a 500mm, trace length. We are now able to put 1-sigma error bar of 0.3 microradian on an average of 10 slope profile measurements over a 500mm long trace length, and we are now able to put a 0.2 microradian error bar on an average of 10 measurements over a 200mm trace length. The corresponding 1-sigma height error bar for this measurement is 1.1 run

Towards Precision LSST Weak-Lensing Measurement - I: Impacts of Atmospheric Turbulence and Optical Aberration

The weak-lensing science of the LSST project drives the need to carefully model and separate the instrumental artifacts from the intrinsic lensing signal. The dominant source of the systematics for all ground based telescopes is the spatial correlation of the PSF modulated by both atmospheric turbulence and optical aberrations. In this paper, we present a full FOV simulation of the LSST images by modeling both the atmosphere and the telescope optics with the most current data for the telescope specifications and the environment. To simulate the effects of atmospheric turbulence, we generated six-layer phase screens with the parameters estimated from the on-site measurements. For the optics, we combined the ray-tracing tool ZEMAX and our simulated focal plane data to introduce realistic aberrations and focal plane height fluctuations. Although this expected flatness deviation for LSST is small compared with that of other existing cameras, the fast f-ratio of the LSST optics makes this focal plane flatness variation and the resulting PSF discontinuities across the CCD boundaries significant challenges in our removal of the systematics. We resolve this complication by performing PCA CCD-by-CCD, and interpolating the basis functions using conventional polynomials. We demonstrate that this PSF correction scheme reduces the residual PSF ellipticity correlation below 10^-7 over the cosmologically interesting scale. From a null test using HST/UDF galaxy images without input shear, we verify that the amplitude of the galaxy ellipticity correlation function, after the PSF correction, is consistent with the shot noise set by the finite number of objects. Therefore, we conclude that the current optical design and specification for the accuracy in the focal plane assembly are sufficient to enable the control of the PSF systematics required for weak-lensing science with the LSST.Comment: Accepted to PASP. High-resolution version is available at http://dls.physics.ucdavis.edu/~mkjee/LSST_weak_lensing_simulation.pd

Gatekeeping and Psychological Safety: Qualitative Analysis of Early-Career Counselor Educators

Using transcendental phenomenology, researchers investigated the gatekeeping experiences of 17 early-career counselor educators working in CACREP programs. Guided by the research question: How do early-career counselor education faculty members perceive their role as a gatekeeper and balance this role, while creating a supportive learning environment for their graduate students? Three primary themes emerged: gatekeeping is challenging, psychological safety is created through intentionality, and gatekeeping and psychological safety interac

Conversion of Aniline to Azobenzene at Functionalized Carbon Nanotubes: A Possible Case of a Nanodimensional Reaction

Aniline is oxidized to nitrosobenzene as the initial product, which undergoes further oxidation to nitrobenzene. The nitrosobenzene formation is catalyzed by functionalized multiwalled carbon nanotubes (CNT) followed by a coupling reaction between nitrosobenzene and aniline to produce azobenzene. This coupling requires close proximity of the reactants. It proceeds rapidly resulting in the UV-VIS absorption spectrum showing maxima at 327 nm and 425 nm. The nitrosobenzene yield in the presence of CNTs is controlled by the amount present in the medium. As the reaction is not catalyzed by unfunctionalized CNTs or graphitic particles, the uniqueness of the functionalized multiwalled CNTs in this catalysis suggests a nanodimensional reaction pathway