Keyline design A keyline irrigation channel Keyline design is a technique for maximizing beneficial use of water resources of a piece of land. The Keyline refers to a specific topographic feature linked to water flow. Beyond that however, Keyline can be seen as a collection of design principles, techniques and systems for development of rural and urban landscapes.
American Transportation statistics - How United States ranks Definitions Airports > With paved runways > 1,524 to 2,437 m: This entry is derived from Transport > Airports > With paved runways, which gives the total number of airports with paved runways (concrete or asphalt surfaces) by length. For airports with more than one runway, only the longest runway is included according to the following five groups - (1) over 3,047 m (over 10,000 ft), (2) 2,438 to 3,047 m (8,000 to 10,000 ft), (3) 1,524 to 2,437 m (5,000 to 8,000 ft), (4) 914 to 1,523 m (3,000 to 5,000 ft), and (5) under 914 m (under 3,000 ft). Only airports with usable runways are included in this listing. Not all airports have facilities for refueling, maintenance, or air traffic control.
Structure, Dynamics, and Function of Aquaporins The Art of Water Transport in Aquaporins Aquaporins are membrane water channels that play critical roles in controlling the water contents of cells. These channels are widely distributed in all kingdoms of life, including bacteria, plants, and mammals. More than ten different aquaporins have been found in human body, and several diseases, such as congenital cataracts and nephrogenic diabetes insipidus, are connected to the impaired function of these channels. They form tetramers in the cell membrane, and facilitate the transport of water and, in some cases, other small solutes across the membrane. However, the water pores are completely impermeable to charged species, such as protons, a remarkable property that is critical for the conservation of membrane's electrochemical potential, but paradoxical at the same time, since protons can usually be transfered readily through water molecules.
History of Asphalt Laura Ingalls Wilder, author of the beloved Little House on the Prairie, tells of her first encounter with an asphalt pavement. She was on a wagon journey with her parents in 1894 that took them through Topeka. "In the very midst of the city, the ground was covered by some dark stuff that silenced all the wheels and muffled the sound of hoofs. Kavli Prize Science Forum WEBCAST - "Science and Global Health: The Role of Basic Science" September 3, 2012 Summary 2012 Kavli Prize Science Forum Opening Speaker Jens Stoltenberg, Prime Minister of Norway PanelistsRita Colwell, Former Director, National Science Foundation, USAlice Dautry, President, Institut Pasteur, FranceHarvey Fineberg, President, Institute of Medicine, USKiyoshi Kurokawa, Chairman, Health and Global Policy Institute, Japan
solar powered roadways by scott brusaw aug 07, 2012 solar powered roadways by scott brusaw ‘solar powered roads’ by scott brusaw american electrical engineer scott brusaw has developed a system of solar powered roads as an initiative to change the face of national highways. his project ‘solar roadways’ aims to re-purpose existing concrete and asphalt surfaces that are exposed to the sun with solar road panels. English verb Conjugation: modal verbs, irregular verbs, present, future, participle In English, you can type in infinitive forms such as go, abide, break … but also not remember, hurt oneself, come in, go back ... The conjugator recognizes infinitive, reflexive and negative forms as well as phrasal verbs. The Contractions option displays the contracted forms of auxiliaries and negatives, e.g.: not believe: « I do not believe » or « I don't believe », see: « I have seen » or « I've seen », « I will go » or « I'll go »... The conjugator uses conjugation rules for irregular verbs and models.
2012 top ten: technology dec 23, 2012 designboom 2012 top ten: technology designboom’s 2012 TOP 10 technology features Illustration portfolios Vast array of illustration drawing styles. Editorial design. Eye candy curator / editor of Featured by, Carole Guevin showcases the world wide digital culture. The Work of Edward Tufte and Graphics Press Graphics Press LLC P.O. Box 430 Cheshire, CT 06410 800 822-2454 Edward Tufte is a statistician and artist, and Professor Emeritus of Political Science, Statistics, and Computer Science at Yale University. He wrote, designed, and self-published 4 classic books on data visualization. The New York Times described ET as the "Leonardo da Vinci of data," and Business Week as the "Galileo of graphics." He is now writing a book/film The Thinking Eye and constructing a 234-acre tree farm and sculpture park in northwest Connecticut, which will show his artworks and remain open space in perpetuity.
Next-Gen 3D 'Sponge' Battery Could Recharge in Minutes, Retain Energy for Days We like to boast about how ‘smart’ our mobile devices and computers have become – but why are we still powering them with dumb batteries? Amy Prieto, a chemistry professor at Colorado State University, started a company that is created a three-dimensional battery with a core of copper foam. Although it’s still in the very beginning stages of development, this incredibly smart technology could lead to batteries that contain two times more energy and charge in five minutes flat. Although modern rechargeable batteries make smartphones and GPS possible, they’re still extremely expensive, lose their charge in short order and come loaded with planet-killing toxins. Prieto thinks it’s inexcusable that while our devices have become more sophisticated, our batteries have remained virtually the same for over one hundred years. The conventional battery surface is two-dimensional, which limits the direction and speed at which energy can flow.
Hot bulb engine Hot bulb engine (two-stroke).1. Hot bulb2. Cylinder3. Piston4. Crankcase The hot bulb engine, or hotbulb or heavy oil engine is a type of internal combustion engine.