944 research outputs found
The theory and practice of brewing illustrated : containing the chemistry, history and right application of all brewing ingredients and products; a full exposition of the newly discovered principles of conversion and extraction in the mash-tun; the philosophy of climate season, and site; critiques on the modus operandi of fermentation, and the effectual prevention of acidity; also, many new practical observations on brewing London and Dublin Porter, East India Pale Ale, export stout, &c. &c
No full textby W.L. TizardHandschriftliches Exlibris: "Rich Wigfull...Sheffield" 002180363_0001 Exemplar der ETH-BI
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Impact origin of the Moon
No full textA few years after the Apollo flights to the Moon, it became clear that all of the existing theories on the origin of the Moon would not satisfy the growing body of constraints which appeared with the data gathered by the Apollo flights. About the same time, researchers began to realize that the inner (terrestrial) planets were not born quietly -- all had evidences of impacts on their surfaces. This fact reinforced the idea that the planets had formed by the accumulation of planetesimals. Since the Earth`s moon is unique among the terrestrial planets, a few researchers realized that perhaps the Moon originated in a singular event; an event that was quite probable, but not so probable that one would expect all the terrestrial planets to have a large moon. And thus was born the idea that a giant impact formed the Moon. Impacts would be common in the early solar system; perhaps a really large impact of two almost fully formed planets of disparate sizes would lead to material orbiting the proto-earth, a proto-moon. This idea remained to be tested. Using a relatively new, but robust, method of doing the hydrodynamics of the collision (Smoothed-Particle Hydrodynamics), the author and his colleagues (W. Benz, Univ. of Arizona, and A.G.W. Cameron, Harvard College Obs.) did a large number of collision simulations on a supercomputer. The author found two major scenarios which would result in the formation of the Moon. The first was direct formation; a moon-sized object is boosted into orbit by gravitational torques. The second is when the orbiting material forms a disk, which, with subsequent evolution can form the Moon. In either case the physical and chemical properties of the newly formed Moon would very neatly satisfy the physical and chemical constraints of the current Moon. Also, in both scenarios the surface of the Earth would be quite hot after the collision. This aspect remains to be explored
Memorandum to Colonel W. L. Magill, Jr. Provost Marshal and Director of Evacuation
No full textMemorandum to the Colonel W.L. Magill Jr., Provost Marshal and Director of Evacuation presumably from a committee with the following members: Galen M. Fisher, Gordon Chapman, C. A. Richardson, and F. H. Smith. The memo includes the following subtitles: General Purpose and General Considerations.The Bishop James Chamberlain Baker Collection includes letters, documents, and articles about Japanese Americans during World War II. Subjects in the collection include Japanese Americans mass removal, Pearl Harbor and the aftermath, religion, and support from the non-Japanese American community. The collection was digitized and made accessible online by CSUDH Gerth Archives and Special Collections
Power system operation with large-scale wind power in liberalised environments
No full textOur society revolves around electricity. Most electricity is produced from fossil fuels, such as coal and natural gas. The disadvantages are that their supply is finite and unevenly distributed across the earth. Conventional power stations also emit greenhouse gases. Therefore, sustainable alternativees must be developed, such as wind power. The disadvantages of wind are that it may or may not blow and that it is unpredictable. Th generation of electricity must however always equal the consumption. This makes the integration of wind power in the electricity system more difficult. This Ph.D.-theis investigates the integration of wind power into the existing power system. Simulation models are developed and used to explore the operation of power systems with a lot of wind power. The simulations provide a picture of the reliability, cost and emission of CO2 of the generation of electricity, with and without wind power. The research also takes into account electricity exchange on international markets. Possible solutions for integrating wind power, such as flexible power plants and energy storage, are investigated as well.Electrical Engineering, Mathematics and Computer Scienc
Reliability evaluation of electrik transmission and distribution systems
No full textElectrical Engineering, Mathematics and Computer Scienc
Optimisation of transmission systems by use of phase shifting transformers
No full textElectrical Engineering, Mathematics and Computer Scienc
Sensors for quality control of materials, products and processes
No full textCivil Engineering and Geoscience
Wind Power: Modelling and Impact on Power System Dynamics
No full textElectrical Engineering, Mathematics and Computer Scienc
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