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Reprint of the original, first published in 1873. The publishing house Anatiposi publishes historical books as reprints. Due to their age, these books may have missing pages or inferior quality. Our aim is to preserve these books and make them available to the public so that they do not get lost.
During the 5,000-year period from -1999 to +3000 (2000 BCE to 3000 CE), Earth will experience 11,898 eclipses of the Sun. The eclipses are distributed as follows: 4200 partial eclipses, 3956 annular eclipses, 3173 total eclipses, and 569 hybrid eclipses.The "Five Millennium Catalog of Solar Eclipses: -1999 to +3000" contains a catalog listing the date, eclipse type, and principal characteristics of every eclipse during this period. Tabulated data for each eclipse includes the catalog number, canon plate number, calendar date, Terrestrial Dynamical Time of greatest eclipse, ?T, lunation number, Saros number, eclipse type, Quincena Lunar Eclipse parameter, gamma, eclipse magnitude, geographic coordinates of greatest eclipse (latitude and longitude), and the circumstances at greatest eclipse (i.e., Sun altitude and azimuth, path width, and central line duration).The statistics of the solar eclipse distribution over 5,000 years are investigated in detail. This includes eclipse types by month and by century, eclipse frequency in the calendar year, extremes in eclipse magnitude for all eclipse types, maximum durations of total, annular, and hybrid eclipses, and eclipse duos (two eclipses within 30 days of each other).A discussion of the major cycles in the Moon's orbit and their role in the occurrence of solar eclipses is presented. These include the synodic, the anomalistic, and the draconic months.Finally, the periodicity of solar eclipses is investigated with particular attention to the Saros cycle. Tables list the start and end dates, number, and type of eclipses of every Saros series in progress during the 5,000-year period covered by the Five Millennium Canon.The Catalog serves as a supplement to the "Five Millennium Canon of Solar Eclipses" which contains a map of every eclipse. The Canon and the Catalog both use the same solar and lunar ephemerides as well as the same value of ?T. This 1-to-1 correspondence between them enhances the value of each. The researcher may now search, evaluate, and compare eclipses graphically (Canon) or textually (Catalog).
Technologies and Approaches to Reducing the Fuel Consumption of Medium- and Heavy-Duty Vehicles evaluates various technologies and methods that could improve the fuel economy of medium- and heavy-duty vehicles, such as tractor-trailers, transit buses, and work trucks. The book also recommends approaches that federal agencies could use to regulate these vehicles' fuel consumption. Currently there are no fuel consumption standards for such vehicles, which account for about 26 percent of the transportation fuel used in the U.S. The miles-per-gallon measure used to regulate the fuel economy of passenger cars. is not appropriate for medium- and heavy-duty vehicles, which are designed above all to carry loads efficiently. Instead, any regulation of medium- and heavy-duty vehicles should use a metric that reflects the efficiency with which a vehicle moves goods or passengers, such as gallons per ton-mile, a unit that reflects the amount of fuel a vehicle would use to carry a ton of goods one mile. This is called load-specific fuel consumption (LSFC). The book estimates the improvements that various technologies could achieve over the next decade in seven vehicle types. For example, using advanced diesel engines in tractor-trailers could lower their fuel consumption by up to 20 percent by 2020, and improved aerodynamics could yield an 11 percent reduction. Hybrid powertrains could lower the fuel consumption of vehicles that stop frequently, such as garbage trucks and transit buses, by as much 35 percent in the same time frame.
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