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Bond of Reinforcement in High-Strength Concrete

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This paper describes an examination of the development of tension lap splices in high strength concrete and the applicability of the restriction in the ACI 318 code where the values of √fc’ used to calculate development length shall not exceed 100 psi.

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Exploring Phosphorene, a Promising New Material

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Researchers have developed a new method to quickly and accurately determine the orientation of phosphorene, a promising new material with potential application for semiconducting transistors in ever faster and more powerful computers.

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New Computational Modeling Procedure Developed for Estimating Behavior of Reinforced Concrete Members Subjected to Fire

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Fire causes extensive financial losses due to property damage, as well as endangers the life and well-being of occupants. This new study throws light on the behavior of reinforced concrete members subjected to fire.

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Fiber-Reinforced Bowling Ball Student Competition Winners

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Student teams from around the world competed in the recent ACI Fiber-Reinforced Concrete Bowling Ball Competition. During this event, students were challenged to design and construct a fiber-reinforced concrete bowling ball that achieves optimal performance for specified tests and tasks, and document and present the team’s work to an audience of industry professionals.

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In the War Against Dust, a New Tool Inspired by Geckos

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Micrometric and sub-micrometric contaminant particles — what most of us call “dust” — can cause big problems for art conservators, the electronics industry, aerospace engineers, and others. These nanoparticles can prevent a cellphone from working or rob the vitality of a painting’s colors.

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Innovative Mixtures Can Reduce Life Cycle Costs in Concrete Pavement Repair

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New concrete pavement repair research shows that using nanomaterials can improve long-term performance and durability, and reduce life-cycle costs.

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Seeing Atoms and Molecules in Action with an Electron 'Eye'

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A unique rapid-fire electron source—originally built as a prototype for driving next-generation X-ray lasers—will help scientists at Berkeley Lab study ultrafast chemical processes and changes in materials at the atomic scale.

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Metal Ions First Sneak in, Then Bust Through

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For the first time, scientists obtained an atomic view of two key processes in batteries as they are charged; this study offers new insights about the underlying principles involved in energy storage.

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It Takes More Than Peer Pressure to Make Large Microgels Fit In

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Researchers believe they've solved the mystery of how oversized microgels shrink to fit colloidal crystals, and what they've learned could also have implications for biological systems made up of soft organic particles not unlike the polymer microgels.

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Iowa State Engineers Develop Micro-Sized, Liquid-Metal Particles for Heat-Free Soldering

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Martin Thuo of Iowa State and the Ames Laboratory has led development of liquid-metal particles that can be used for heat-free soldering and other applications. Thuo has helped launch a startup company to develop and market the technology.

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Atoms Placed Precisely in Silicon Can Act as Quantum Simulator

In a proof-of-principle experiment, researchers at UNSW Australia have demonstrated that a small group of individual atoms placed very precisely in silicon can act as a quantum simulator, mimicking nature - in this case, the weird quantum interactions of electrons in materials.

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Peering Deep Into Materials with Ultrafast Science

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Creating the batteries or electronics of the future requires understanding materials that are just a few atoms thick and that change their fundamental physical properties in fractions of a second. Cutting-edge facilities at the Department of Energy's SLAC National Accelerator Laboratory and Stanford University have allowed researchers like Aaron Lindenberg to visualize properties of these nanoscale materials at ultrafast time scales.

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New Material Combines Useful, Typically Incompatible Properties

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Most materials, too, are capable of being only one thing at a time, but a team of engineers and physicists at the University of Wisconsin–Madison have created an entirely new material in which completely contradictory properties can coexist.

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A One-Atom Engine, 'Odd Couple' Monolayer Semiconductors, A Computer Program That Helps Stabilize Fusion Plasmas and more at the Newswise Physics Channel

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Zinc-Manganese May Replace Lithium-Ion Batteries, and more DOE Science News in the Newswise Channels

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A New Way to Get Electricity From Magnetism

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By showing that a phenomenon dubbed the “inverse spin Hall effect” works in several organic semiconductors – including carbon-60 buckyballs – University of Utah physicists changed magnetic “spin current” into electric current. The efficiency of this new power conversion method isn’t yet known, but it might find use in future electronic devices including batteries, solar cells and computers.

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Ames Laboratory Scientist Inducted Into National Academy of Inventors

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U.S. Department of Energy’s (DOE) Ames Laboratory senior metallurgist Iver Anderson was inducted into the National Academy of Inventors (NAI) at a special ceremony in Washington, D.C. today at the United States Patent and Trademark Office (USPTO).

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SLAC Researchers Recreate the Extreme Universe in the Lab

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Conditions in the vast universe can be quite extreme: Violent collisions scar the surfaces of planets. Nuclear reactions in bright stars generate tremendous amounts of energy. Gigantic explosions catapult matter far out into space. But how exactly do processes like these unfold? What do they tell us about the universe? To find out, researchers from the Department of Energy’s SLAC National Accelerator Laboratory perform sophisticated experiments and computer simulations that recreate violent cosmic conditions on a small scale in the lab.

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First-Ever Videos Show How Heat Moves Through Materials at the Nanoscale and Speed of Sound

Using a state-of-the-art ultrafast electron microscope, University of Minnesota researchers have recorded the first-ever videos showing how heat moves through materials at the nanoscale traveling at the speed of sound.

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Artificial Moth Eyes Enhance Silicon Solar Cells

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Mimicking the texture found on the surfaces of the eyes of moths, scientists have produced nanotextured designs across silicon-based solar cells. The texturing significantly enhanced the light-harvesting and, hence, overall performance of the solar cells.