منابع مشابه
Mercury Emissions from Motor Vehicles
The U.S. Environmental Protection Agency initiated a pilot program in 2002 with researchers at the University of Michigan Air Quality Laboratory to investigate motor vehicle mercury emissions. The program included exhaust emissions characterization of vapor and particulate phase mercury from three light-duty gasoline vehicles, one diesel vehicle and mercury analysis of fuel, lubricating oil, en...
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Although more appropriately placed in a chapter dealing with basic principals, an extensive discussion of error analysis is included in Chapter 4. This discussion includes the introduction of the Monte Carlo method of analysis, which has recently been appearing in accident reconstruction reports and articles. Given the adversarial context in which the subjects presented in this book will be use...
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One of the options being examined in last decades in the development of environmentally sustainable, energy-efficient and lightweight vehicles is the replacement of piston engines by gas turbine engines, especially in hybrid vehicles. A lot of effort has been consistently put in design and production of concept hybrid automobiles powered by gas turbine engines by leading automobile producers su...
متن کاملMotor Proteins Have Highly Correlated Brownian Engines
Two headed motor proteins, such as kinesin and dynein, hydrolyze environmental ATP in order to propel unidirectionally along cytoskeletal filaments such as microtubules. In the intensely studied case of kinesin, protein heads of approximate dimension 4 × 4 × 7 nm bind primarily on the α tubulin site of asymmetric α–β 8nm-long tubulin dimers that constitute the microtubular protofilaments. Kines...
متن کاملGamma-ray Bursts and Their Central Engines
Gamma-ray bursts are the most luminous and probably the most relativistic events in the universe. The last few years have seen a tremendous increase in our knowledge of these events, but the source of the bursts still remains elusive. I will summarise recent progress in this field with special emphasis on our understanding of the possible progenitor systems.
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ژورنال
عنوان ژورنال: Nature
سال: 1942
ISSN: 0028-0836,1476-4687
DOI: 10.1038/150074a0