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

Unavoidable parallel minors of regular matroids

This is the post-print version of the Article - Copyright @ 2011 ElsevierWe prove that, for each positive integer k, every sufficiently large 3-connected regular matroid has a parallel minor isomorphic to M (K_{3,k}), M(W_k), M(K_k), the cycle matroid of the graph obtained from K_{2,k} by adding paths through the vertices of each vertex class, or the cycle matroid of the graph obtained from K_{3,k} by adding a complete graph on the vertex class with three vertices.This study is partially supported by a grant from the National Security Agency

On two classes of nearly binary matroids

We give an excluded-minor characterization for the class of matroids M in which M\e or M/e is binary for all e in E(M). This class is closely related to the class of matroids in which every member is binary or can be obtained from a binary matroid by relaxing a circuit-hyperplane. We also provide an excluded-minor characterization for the second class.Comment: 14 pages, 4 figures. This paper has been accepted for publication in the European Journal of Combinatorics. This is the final version of the pape

Meeting of Experts on NASA's Unmanned Aircraft System (UAS) Integration in the National Airspace Systems (NAS) Project

Topics discussed include: Aeronautics Research Mission Directorate Integrated Systems Research Program (ISRP) and UAS Integration in the NAS Project; UAS Integration into the NAS Project; Separation Assurance and Collision Avoidance; Pilot Aircraft Interface Objectives/Rationale; Communication; Certification; and Integrated Tests and Evaluations

Heterogeneous contributions of change in population distribution of body mass index to change in obesity and underweight

From 1985 to 2016, the prevalence of underweight decreased, and that of obesity and severe obesity increased, in most regions, with significant variation in the magnitude of these changes across regions. We investigated how much change in mean body mass index (BMI) explains changes in the prevalence of underweight, obesity, and severe obesity in different regions using data from 2896 population-based studies with 187 million participants. Changes in the prevalence of underweight and total obesity, and to a lesser extent severe obesity, are largely driven by shifts in the distribution of BMI, with smaller contributions from changes in the shape of the distribution. In East and Southeast Asia and sub-Saharan Africa, the underweight tail of the BMI distribution was left behind as the distribution shifted. There is a need for policies that address all forms of malnutrition by making healthy foods accessible and affordable, while restricting unhealthy foods through fiscal and regulatory restrictions

Hematopoietic stem and progenitor cells are a distinct HIV reservoir that contributes to persistent viremia in suppressed patients

Long-lived reservoirs of persistent HIV are a major barrier to a cure. CD4+ hematopoietic stem and progenitor cells (HSPCs) have the capacity for lifelong survival, self-renewal, and the generation of daughter cells. Recent evidence shows that they are also susceptible to HIV infection in vitro and in vivo. Whether HSPCs harbor infectious virus or contribute to plasma virus (PV) is unknown. Here, we provide strong evidence that clusters of identical proviruses from HSPCs and their likely progeny often match residual PV. A higher proportion of these sequences match residual PV than proviral genomes from bone marrow and peripheral blood mononuclear cells that are observed only once. Furthermore, an analysis of near-full-length genomes isolated from HSPCs provides evidence that HSPCs harbor functional HIV proviral genomes that often match residual PV. These results support the conclusion that HIV-infected HSPCs form a distinct and functionally significant reservoir of persistent HIV in infected people