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Analyse du sol --- Assainissement du sol --- Bodemonderzoek --- Bodemsanering --- Colloques --- Colloquia --- 631.432.3 --- Academic collection --- 681.3*I63 --- Permeability. Lessivage. Leaching. Mobility of soil constituents --- Applications (Simulation and modeling) --- 681.3*I63 Applications (Simulation and modeling) --- 631.432.3 Permeability. Lessivage. Leaching. Mobility of soil constituents

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Water is the basis of all life. Preservation of aquatic ecosystems and protection of water resources thus are among the most important goals of a sustainable development. The quality of water is mainly determined by its constituents, the entirety of the substances dissolved or suspended in water. To assess the water quality on a sound basis requires in-depth knowledge about the occurrence, behavior and fate of these constituents. That explains the importance of hydrochemistry (also referred to as water chemistry or aquatic chemistry) as a scientific discipline that deals with water constituents and their reactions within the natural water cycle and within the cycle of water use. This textbook introduces the elementary basics of hydrochemistry with special focus on reaction equilibria in aquatic systems and their mathematical description. It is designed as an introductory textbook for students of all environment-related courses who are beginning their hydrochemical education. Only minor knowledge in General Chemistry is required to understand the text. The book is also suitable for continuing education. Topics discussed in this textbook include: structure and properties of water, concentration measures and activities, colligative properties, basics of chemical equilibria, gas-water partitioning, acid/base reactions, precipitation/dissolution, calco-carbonic equilibrium, redox reactions, complex formation, and sorption. The text is supplemented by numerous figures and tables. More than 50 examples within the text as well as more than 60 problems to be solved by the reader support the acquiring of knowledge. Complete and detailed solutions to all problems are given in a separate chapter.

Salinization. --- Water chemistry. --- Water usage. --- Water. --- Water chemistry --- Physical Geography --- Geography --- Earth & Environmental Sciences --- Aquatic chemistry --- Chemical hydrology --- Hydrochemistry --- Hydrogeochemistry --- Natural water chemistry --- Geochemistry --- Hydrology --- Aquatic systems, Hydrochemistry, Hydrochemical reactions, Water constituents, Water quality.

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Finite element method --- Groundwater flow --- 556.3 --- 631.432.3 --- 681.3*I63 --- 681.3*I63 Applications (Simulation and modeling) --- Applications (Simulation and modeling) --- 631.432.3 Permeability. Lessivage. Leaching. Mobility of soil constituents --- Permeability. Lessivage. Leaching. Mobility of soil constituents --- 556.3 Groundwater hydrology. Geohydrology. Hydrogeology --- Groundwater hydrology. Geohydrology. Hydrogeology --- FEA (Numerical analysis) --- FEM (Numerical analysis) --- Finite element analysis --- Numerical analysis --- Isogeometric analysis --- Mathematical models

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ASTRONOMERS’ OBSERVING GUIDES provide up-to-date information for amateur astronomers who want to know all about what it is they are observing. This is the basis of the first part of the book. The second part details observing techniques for practical astronomers, working with a range of different instruments. Have you ever been on the beach at night, watching the sky overhead, and seen streaks of light against the background of stars? Though many people still refer to these as shooting stars, they are, of course, not stars. They are meteors—small chunks of rock and ice debris from disintegrating comets that are careening through our Solar System and sometimes enter Earth’s atmosphere. Most are so small that they burn up as they enter the atmosphere. These are called meteors. In a meteor shower, many meteors can be seen streaking across the sky in a short time. A few meteors make it through intact and descend to Earth as meteorites. Watching these beautiful streaks of light in the sky can be an exciting pastime, and it can result in some important science. Robert Lunsford explains what meteors are, where they come from, and what happens to them as they whiz through space and enter our atmosphere. He tells how to observe meteors and meteor showers, what equipment to use, what you should look for, where you should look, and much more. Armed with the information in this book and with very little effort and equipment, you can begin your regular search of the heavens right now and join the ranks of those who have made this rewarding pastime a lifetime hobby. Practical Astronomy ISBN 978-0-387-09460-1 springer.com.

Meteors --- Astronomy --- Popular works. --- Planetology. --- Observations, Astronomical. --- Space sciences. --- Astronomy. --- Popular Science. --- Popular Science in Astronomy. --- Extraterrestrial Physics, Space Sciences. --- Astronomy, Observations and Techniques. --- Physical sciences --- Space sciences --- Science and space --- Space research --- Cosmology --- Science --- Astronomical observations --- Observations, Astronomical --- Planetary sciences --- Planetology --- Observations. --- Astronomical meteors --- Falling stars --- Fireballs (Meteors) --- Shooting stars (Meteors) --- Stars, Falling --- Stars, Shooting --- Near-Earth objects --- Plant products. --- Phytochemistry. Phytobiochemistry --- 581.1 --- 581.19 --- 581.19 Chemical constituents of plants --- Chemical constituents of plants --- 581.1 Plant physiology --- Plant physiology --- Plant products --- Produits végétaux --- Astrophysics. --- Space Sciences (including Extraterrestrial Physics, Space Exploration and Astronautics). --- Astronomical physics --- Cosmic physics --- Physics --- Astronomy—Observations.

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At first glance, campaign finance reform looks like a good idea. McCain-Feingold, for instance, regulates campaigns by prohibiting national political parties from accepting soft money contributions from corporations, labor unions, and wealthy individuals. But are such measures, or any of the numerous and similarly restrictive proposals that have circulated through Washington in recent years, really good for our democracy?. John Samples says no, and here he takes a penetrating look into the premises and consequences of the long crusade against big money in politics. How many Americans, he asks,

Campaign funds --- Law and legislation --- campaign finance reform, politics, political science, party system, interest groups, lobbying, corruption, elections, candidates, fundraising, campaigning, nonfiction, government, democracy, regulation, mccain-feingold, soft money, corporations, unions, wealth, congress, negative ads, voter turnout, incumbents, constituents, electoral competition, funds, law, legislation, electorate, constituency, representation, equality, voting.