Universal Service in the United States: A Focus on Mobile Communications

The concept of universal service, providing affordable telecommunications to all citizens, has a long and changing history in the United States. Prior to the Telecommunications Act of 1996, efforts to achieve universal service were largely based on a complex web of implicit subsidies to basic landline local exchange residential service. The Act expanded and codified the concept of universal service and made the subsidies largely explicit. This Article evaluates the possible economic rationales for subsidizing voice communications and find them lacking. This Article argues that the weak rationale for subsidizing basic voice communications makes it critical that U.S. universal-service policy be competitively neutral with respect to firms and technologies in order to minimize distortions of market processes. However, past regulatory policies have favored wireline vis-A-vis mobile technologies. Moreover, four recent regulatory events threaten to perpetuate and exacerbate the asymmetric treatment of mobile technologies. The recent appointment of three new FCC commissioners may provide an opportunity for more economically rational and competitively neutral policy and funding mechanisms in the future

Universal Service in the United States: A Focus on Mobile Communications

The concept of universal service, providing affordable telecommunications to all citizens, has a long and changing history in the United States. Prior to the Telecommunications Act of 1996, efforts to achieve universal service were largely based on a complex web of implicit subsidies to basic landline local exchange residential service. The Act expanded and codified the concept of universal service and made the subsidies largely explicit. This Article evaluates the possible economic rationales for subsidizing voice communications and find them lacking. This Article argues that the weak rationale for subsidizing basic voice communications makes it critical that U.S. universal-service policy be competitively neutral with respect to firms and technologies in order to minimize distortions of market processes. However, past regulatory policies have favored wireline vis-A-vis mobile technologies. Moreover, four recent regulatory events threaten to perpetuate and exacerbate the asymmetric treatment of mobile technologies. The recent appointment of three new FCC commissioners may provide an opportunity for more economically rational and competitively neutral policy and funding mechanisms in the future

Marshall University Music Department Presents the Marshall University Percussion Ensemble, Steven Hall, conductor, Aaron Statler, assistant conductor, featuring Dr. Sean Parsons, keyboards

https://mds.marshall.edu/music_perf/1420/thumbnail.jp

Study of the thermodynamics of chromium(III) and chromium(VI) binding to iron(II/III)oxide or magnetite or ferrite and magnanese(II) iron (III) oxide or jacobsite or manganese ferrite nanoparticles

Removal of chromium(III) or (VI) from aqueous solution was achieved using Fe3O4, and MnFe2O4 nanomaterials. The nanomaterials were synthesized using a precipitation method and characterized using XRD. The size of the nanomaterials was determined to be 22.4±0.9 nm (Fe3O4) and 15.5±0.5 nm (MnFe2O4). The optimal binding pH for chromium(III) and chromium(VI) were pH 6 and pH 3. Isotherm studies were performed, under light and dark conditions, to determine the capacity of the nanomaterials. The capacities for the light studies with MnFe2O4 and Fe3O4 were determined to be 7.189 and 10.63 mg/g, respectively, for chromium(III). The capacities for the light studies with MnFe2O4 and Fe3O4 were 3.21 and 3.46 mg/g, respectively, for chromium(VI). Under dark reaction conditions the binding of chromium(III) to the MnFe2O4 and Fe3O4 nanomaterials were 5.74 and 15.9 mg/g, respectively. The binding capacity for the binding of chromium(VI) to MnFe2O4 and Fe3O4 under dark reaction conditions were 3.87 and 8.54 mg/g, respectively. The thermodynamics for the reactions showed negative ΔG values, and positive ΔH values. The ΔS values were positive for the binding of chromium(III) and for chromium(VI) binding under dark reaction conditions. The ΔS values for chromium(VI) binding under the light reaction conditions were determined to be negative

Measuring the Initial-Final Mass-Relation using wide double white dwarf binaries from Gaia DR3

The Initial-Final Mass-Relation (IFMR) maps the masses of main sequence stars to their white dwarf descendants. The most common approach to measure the IFMR has been to use white dwarfs in clusters. However, it has been shown that wide double white dwarfs can also be used to measure the IFMR using a Bayesian approach. We have observed a large sample of 90 Gaia double white dwarfs using FORS2 on the VLT. Considering 52 DA+DA, DA+DC, and DC+DC pairs, we applied our extended Bayesian framework to probe the IFMR in exquisite detail. Our monotonic IFMR is well constrained by our observations for initial masses of 1-5 Msun, with the range 1-4 Msun mostly constrained to a precision of 0.03 Msun or better. We add an important extension to the framework, using a Bayesian mixture-model to determine the IFMR robustly in the presence of systems departing from single star evolution. We find a large but uncertain outlier fraction of 59$\pm$21 percent, with outlier systems requiring an additional $0.70^{+0.40}_{-0.22}$ Gyr uncertainty in their cooling age differences. However, we find that this fraction is dominated by a few systems with massive components near 0.9 Msun, where we are most sensitive to outliers, but are also able to establish four systems as merger candidatesComment: Accepted for publication in MNRA

The Weight of New York City: Possible Contributions to Subsidence From Anthropogenic Sources

New York City faces accelerating inundation risk from sea level rise, subsidence, and increasing storm intensity from natural and anthropogenic causes. Here we calculate a previously unquantified contribution to subsidence from the cumulative mass and downward pressure exerted by the built environment of the city. We enforce that load distribution in a multiphysics finite element model to calculate expected subsidence. Complex surface geology requires multiple rheological soil models to be applied; clay rich soils and artificial fill are calculated to have the highest post-construction subsidence as compared with more elastic soils. Minimum and maximum calculated building subsidence ranges from 0 to 600 mm depending on soil/rock physical parameters and foundation modes. We compare modeled subsidence and surface geology to observed subsidence rates from satellite data (Interferometric Synthetic Aperture Radar and Global Positioning System). The comparison is complicated because the urban load has accumulated across a much longer period than measured subsidence rates, and there are multiple causes of subsidence. Geodetic measurements show a mean subsidence rate of 1–2 mm/year across the city that is consistent with regional post-glacial deformation, though we find some areas of significantly greater subsidence rates. Some of this deformation is consistent with internal consolidation of artificial fill and other soft sediment that may be exacerbated by recent building loads, though there are many possible causes. New York is emblematic of growing coastal cities all over the world that are observed to be subsiding (Wu et al., 2022, https://doi.org/10.1029/2022GL098477), meaning there is a shared global challenge of mitigation against a growing inundation hazard