TL;DR: In this paper, the authors systematically reviewed and analyzed available source apportionment studies on particulate matter (of diameter of 10 and 25 microns, PM10 and PM25) performed in cities to estimate typical shares of the sources of pollution by country and by region.
TL;DR: This review examines the development of receptor models and the current state of the art in extracting source identification and apportionments from ambient air quality data.
Abstract: Efforts have been made to relate measured concentrations of airborne constituents to their origins for more than 50 years. During this time interval, there have been developments in the measurement technology to gather highly time-resolved, detailed chemical compositional data. Similarly, the improvements in computers have permitted a parallel development of data analysis tools that permit the extraction of information from these data. There is now a substantial capability to provide useful insights into the sources of pollutants and their atmospheric processing that can help inform air quality management options. Efforts have been made to combine receptor and chemical transport models to provide improved apportionments. Tools are available to utilize limited numbers of known profiles with the ambient data to obtain more accurate apportionments for targeted sources. In addition, tools are in place to allow more advanced models to be fitted to the data based on conceptual models of the nature of th...
TL;DR: Balinski and Young as discussed by the authors developed a theory of fair representation that establishes various principles for translating state populations or vote totals of parties into a fair allocation of congressional seats using U.S. history as a guide.
Abstract: The issue of fair representation will take center stage as U.S. congressional districts are reapportioned based on the 2000 Census. Using U.S. history as a guide, the authors develop a theory of fair representation that establishes various principles for translating state populations --or vote totals of parties --into a fair allocation of congressional seats. They conclude that the current apportionment formula cheats the larger states in favor of the smaller, contrary to the intentions of the founding fathers and compromising the Supreme Court's ""one man, one vote"" rulings. Balinski and Young interweave the theoretical development with a rich historical account of controversies over representation, and show how many of these principles grew out of political contests in the course of United States history. The result is a work that is at once history, politics, and popular science. The book --updated with data from the 1980 and 1990 Census counts --vividly demonstrates that apportionment deals with the very substance of political power.
TL;DR: A single volume introduction to contemporary tort and injury law is presented in this paper, which covers direct and intentional interference with person or property and explores their defenses, and reviews liabilities, damages, and the apportionment of responsibility among parties, and examines the criticism and choices in tort law.
Abstract: A single-volume introduction to contemporary tort and injury law. This expert summary covers direct and intentional interference with person or property and explores their defenses. Reviews liabilities, damages, and the apportionment of responsibility among parties, and examines the criticism and choices in tort law. Economic and dignitary injury is considered as well.