Social, Scientific, Litigious: The Birth of a Queer Americanism

The queer rights movement is often assumed to have advanced because of the collateral benefit of other social rights movements occurring around the same time, in the 1950s and 60s. However, the inception of an organized queer rights movement did not happen in line with any progressive time in United States public thought. In reality, the movement began at a time when America was at its least forward-thinking, during the Cold War. It was not the times becoming more progressive, but rather the shift in the model of oppression the queer community faced which allowed for the advent of an effective organization. The Cold War climate, as well as the organizational structure of the Daughters of Bilitis, allowed for the beginning of a queer rights movement outside of what had been seen in early attempts at queer organization, which focused mostly on scientific forms of homophobia. Bilitis was effective because it did not focus on one aspect of the movement, but rather tackled it holistically, looking at the social, scientific, and litigious aspects of homophobia, and acting accordingly

Flutter suppression using eigenspace freedoms to meet requirements

A constrained optimization methodology has been developed which allows specific use of eigensystem freedoms to meet design requirements. A subset of the available eigenvector freedoms was employed. The eigenvector freedoms associated with a particular closed-loop eigenvalue are coefficients of basis vectors which span the subspace in which that closed-loop vector must lie. Design requirements are included as a vector of inequality constraints. The procedure was successfully applied to develop an unscheduled controller which stabilizes symmetric flutter of an aeroelastic vehicle to a dynamic pressure 44 percent above the open-loop flutter point. The design process proceeded from full-state feedback to the inclusion of a full-order observer to the selection of an eighth-order controller which preserved the full-state sensitivity characteristics. Only a subset of the design freedoms was utilized (i.e., assuming full-state feedback only four out of 26 eigenvectors were used, and no variations were made in the closed-loop eigenvalues). Utilization of additional eigensystem freedoms could further improve the controller

Probing photoinduced spin states in spin-crossover molecules with neutron scattering

We report a neutron scattering investigation of the spin crossover compound \rm [Fe(ptz)6](BF4)2 which undergoes an abrupt thermal spin-transition from high-spin (HS) S=2 to low-spin (LS) S=0 around 135 K. The HS magnetic state can be restored at low temperature under blue/green light irradiation. We have developed a specially designed optical setup for neutron scattering to address the magnetic properties of the light-induced HS state. By using neutron diffraction, we demonstrate that significant HS/LS ratios (of up to 60 \%) can be obtained with this experimental setup on a sample volume considered large (400 mg), while a complete recovery of the LS state is achieved using near infrared light. With inelastic neutron scattering (INS) we have observed, for the first time in a photo-induced phase, magnetic transitions arising from the metastable HS S=2 state split by crystal field and spin-orbit coupling. We interpret the INS data assuming a spin-only model with a zero-field splitting (ZFS) of the S=2 ground state. The obtained parameters are D \approx -1.28 \pm 0.03 meV and |E| \approx 0.08 \pm 0.03 meV. The present results show that in situ magnetic inelastic neutron scattering investigations on a broad range of photomagnetic materials are now possible

Interplay of local hydrogen-bonding and long-ranged dipolar forces in simulations of confined water

Spherical truncations of Coulomb interactions in standard models for water permit efficient molecular simulations and can give remarkably accurate results for the structure of the uniform liquid. However truncations are known to produce significant errors in nonuniform systems, particularly for electrostatic properties. Local molecular field (LMF) theory corrects such truncations by use of an effective or restructured electrostatic potential that accounts for effects of the remaining long-ranged interactions through a density-weighted mean field average and satisfies a modified Poisson's equation defined with a Gaussian-smoothed charge density. We apply LMF theory to three simple molecular systems that exhibit different aspects of the failure of a naive application of spherical truncations -- water confined between hydrophobic walls, water confined between atomically-corrugated hydrophilic walls, and water confined between hydrophobic walls with an applied electric field. Spherical truncations of 1/r fail spectacularly for the final system in particular, and LMF theory corrects the failings for all three. Further, LMF theory provides a more intuitive way to understand the balance between local hydrogen bonding and longer-ranged electrostatics in molecular simulations involving water.Comment: Submitted to PNA

Exactions Creep

How can the Constitution protect landowners from government exploitation without disabling the machinery that protects landowners from each other? The Supreme Court left this central question unanswered — and indeed unasked — in Koontz v. St. Johns River Water Management District. The Court’s exactions jurisprudence, set forth in Nollan v. California Coastal Commission, Dolan v. City of Tigard, and now Koontz, requires the government to satisfy demanding criteria for certain bargains — or proposed bargains — implicating the use of land. Yet because virtually every restriction, fee, or tax associated with the ownership or use of land can be cast as a bargain, the Court must find some way to hive off the domain of exactions from garden variety land use regulations. This it refused to do in Koontz, opting instead to reject boundary principles that it found normatively unstable. By beating back one form of exactions creep — the possibility that local governments will circumvent a too-narrowly drawn circle of heightened scrutiny — the Court left land use regulation vulnerable to the creeping expansion of heightened scrutiny under the auspices of its exactions jurisprudence. In this paper, we lay out this dilemma and suggest that it should lead the Court to rethink its exactions jurisprudence, and especially its grounding in the Takings Clause, rather than the Due Process Clause. The sort of skepticism about bargaining reflected in the Court’s exactions cases, we suggest, finds its most plausible roots in rule-of-law concerns implicated by land use dealmaking. With those concerns in mind, we consider alternatives that would attempt to reconcile the Court’s twin interests in reining in governmental power over property owners and in keeping the gears of ordinary land use regulation running in ways that protect the property interests of those owners

Exactions Creep

How can the Constitution protect landowners from government exploitation without disabling the machinery that protects landowners from each other? The Supreme Court left this central question unanswered — and indeed unasked — in Koontz v. St. Johns River Water Management District. The Court’s exactions jurisprudence, set forth in Nollan v. California Coastal Commission, Dolan v. City of Tigard, and now Koontz, requires the government to satisfy demanding criteria for certain bargains — or proposed bargains — implicating the use of land. Yet because virtually every restriction, fee, or tax associated with the ownership or use of land can be cast as a bargain, the Court must find some way to hive off the domain of exactions from garden variety land use regulations. This it refused to do in Koontz, opting instead to reject boundary principles that it found normatively unstable. By beating back one form of exactions creep — the possibility that local governments will circumvent a too-narrowly drawn circle of heightened scrutiny — the Court left land use regulation vulnerable to the creeping expansion of heightened scrutiny under the auspices of its exactions jurisprudence. In this paper, we lay out this dilemma and suggest that it should lead the Court to rethink its exactions jurisprudence, and especially its grounding in the Takings Clause, rather than the Due Process Clause. The sort of skepticism about bargaining reflected in the Court’s exactions cases, we suggest, finds its most plausible roots in rule-of-law concerns implicated by land use dealmaking. With those concerns in mind, we consider alternatives that would attempt to reconcile the Court’s twin interests in reining in governmental power over property owners and in keeping the gears of ordinary land use regulation running in ways that protect the property interests of those owners

First energetic neutral atom images from Polar

Energetic neutral atoms are created when energetic magnetospheric ions undergo charge exchange with cold neutral atoms in the Earth\u27s tenuous extended atmosphere (the geocorona). Since they are unaffected by the Earth\u27s magnetic field, these energetic neutrals travel away in straight line trajectories from the points of charge exchange. The remote detection of these particles provides a powerful means through which the global distribution and properties of the geocorona and ring current can be inferred. Due to its 2 × 9 RE polar orbit, the Polar spacecraft provides an excellent platform from which to observe ENAs because it spends much of its time in the polar caps which are usually free from the contaminating energetic charged particles that make observations of ENAs more difficult. In this brief report, we present the first ENA imaging results from Polar. Storm-time ENA images are presented for a northern polar cap apogee pass on August 29, 1996 and for a southern polar cap perigee pass on October 23, 1996. As well, we show with a third event (July 31, 1996) that ENA emissions can also be detected in association with individual substorm

Geospatial analysis of regional climate impacts to accelerate cost-efficient direct air capture deployment

Carbon dioxide (CO2) removal from the atmospheric will be essential if we are to achieve net-zero emissions targets. Direct air capture (DAC) is a CO2 removal method with the potential for large-scale deployment. However, DAC operational costs, and thus deployment potential, is dependent on performance, which can vary under different climate conditions. Here, to further develop our understanding of the impact of regional climate variation on DAC performance, we use high-resolution hourly based global weather profiles between 2016 and 2020 and weighted average capital costs to obtain DAC regional performance and levelized cost of DAC (LCOD). We found that relatively cold and drier regions have favorable DAC performance. Moreover, approximately 25% of the world’s land is potentially unsuitable due to very cold ambient temperatures for a substantial part of the year. For the remaining regions, the estimated LCOD is $320–$540 per tCO2 at an electricity cost of $50 MWh−1. Our results improve the understanding of regional DAC performance, which can provide valuable insights for sustainable DAC deployment and effective climate action