Shifting Foundations: The Regulation of Telecommunications in an Era of Change

The recent developments in the telecommunications industry represent to many the birth of the multimedia world of the future that will make available new interactive services, computer and voice applications, and programming choices. The advancements with wireless technology may also make personal communications services (PCS) a major competitor with the local telephone industry. The ramifications of these developments will depend heavily on the regulatory directions that the government selects. The Author, as Commissioner of the FCC, begins his discussion by analyzing the recent business mergers and the motivations behind them. He then reviews the 1992 Cable Act, suggesting that while attempting to implement reregulation, the Commission, Congress, and the industry must collectively strive to ensure that the many opportunities for growth and development are given a viable chance to occur. He also discusses the changes in the cable-telco regulations and the recent developments in the wireless marketplace as potential areas where government regulation will play an important role. The Author concludes that with the tremendous changes in the industry, government regulators will play an important role guaranteeing that the new opportunities are available

Shifting Foundations: The Regulation of Telecommunications in an Era of Change

The recent developments in the telecommunications industry represent to many the birth of the multimedia world of the future that will make available new interactive services, computer and voice applications, and programming choices. The advancements with wireless technology may also make personal communications services (PCS) a major competitor with the local telephone industry. The ramifications of these developments will depend heavily on the regulatory directions that the government selects. The Author, as Commissioner of the FCC, begins his discussion by analyzing the recent business mergers and the motivations behind them. He then reviews the 1992 Cable Act, suggesting that while attempting to implement reregulation, the Commission, Congress, and the industry must collectively strive to ensure that the many opportunities for growth and development are given a viable chance to occur. He also discusses the changes in the cable-telco regulations and the recent developments in the wireless marketplace as potential areas where government regulation will play an important role. The Author concludes that with the tremendous changes in the industry, government regulators will play an important role guaranteeing that the new opportunities are available

The large‐scale freshwater cycle of the Arctic

This paper synthesizes our understanding of the Arctic\u27s large‐scale freshwater cycle. It combines terrestrial and oceanic observations with insights gained from the ERA‐40 reanalysis and land surface and ice‐ocean models. Annual mean freshwater input to the Arctic Ocean is dominated by river discharge (38%), inflow through Bering Strait (30%), and net precipitation (24%). Total freshwater export from the Arctic Ocean to the North Atlantic is dominated by transports through the Canadian Arctic Archipelago (35%) and via Fram Strait as liquid (26%) and sea ice (25%). All terms are computed relative to a reference salinity of 34.8. Compared to earlier estimates, our budget features larger import of freshwater through Bering Strait and larger liquid phase export through Fram Strait. While there is no reason to expect a steady state, error analysis indicates that the difference between annual mean oceanic inflows and outflows (∼8% of the total inflow) is indistinguishable from zero. Freshwater in the Arctic Ocean has a mean residence time of about a decade. This is understood in that annual freshwater input, while large (∼8500 km3), is an order of magnitude smaller than oceanic freshwater storage of ∼84,000 km3. Freshwater in the atmosphere, as water vapor, has a residence time of about a week. Seasonality in Arctic Ocean freshwater storage is nevertheless highly uncertain, reflecting both sparse hydrographic data and insufficient information on sea ice volume. Uncertainties mask seasonal storage changes forced by freshwater fluxes. Of flux terms with sufficient data for analysis, Fram Strait ice outflow shows the largest interannual variability

Thresholds for topological codes in the presence of loss

Many proposals for quantum information processing are subject to detectable loss errors. In this Letter, we show that topological error correcting codes, which protect against computational errors, are also extremely robust against losses. We present analytical results showing that the maximum tolerable loss rate is 50%, which is determined by the square-lattice bond percolation threshold. This saturates the bound set by the no-cloning theorem. Our numerical results support this and show a graceful trade-off between tolerable thresholds for computational and loss errors