Browsing Department of Civil and Environmental Engineering by Title
Now showing items 2174-2193 of 3457
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Nano-ChemoMechanical assessment of Rice Husk Ash cement by wavelength dispersive spectroscopy and nanoindentation
(Massachusetts Institute of Technology, 2011)Cement global production stands at 3 Giga tons making concrete the most consumed structural mateial worldwide. This massively produced material comes with a heavy environmental footprint rendering the cement industry ... -
Nano-sensoromics: Is it Conceptually Similar to Carbonomics?
(2008-12-15)Conceptual systems thinking evoking an amalgam of data analytics in healthcare vs energy -
A nanochemomechanical investigation of carbonated cement paste
(Massachusetts Institute of Technology, 2009)Concrete, and in particular its principal component, cement paste, has an interesting relation with carbon dioxide. Concrete is a carbon dioxide generator-- it is estimated that 5-10% of atmospheric CO₂ comes from this ... -
The nanogranular origin of concrete creep : a nanoindentation investigation of microstructure and fundamental properties of calcium-silicate-hydrates
(Massachusetts Institute of Technology, 2008)With an annual per capita consumption of one cubic meter, concrete is the most manufactured material on Earth. But concrete subject to sustained load creeps, like chewing gum, at a rate that deteriorates the durability and ... -
Nanomechanical coupling of mechanomutable polyelectrolytes
(Massachusetts Institute of Technology, 2012)Nanotechnology has advanced to the point where almost any molecular functional group can be introduced into a composite material system. However, emergent properties attained via the combination of arbitrary components - ... -
A nanomechanical investigation of the crack tip process zone of marble
(Massachusetts Institute of Technology, 2010)This study explores the interaction between crack initiation and nanomechanical properties in the crack tip process zone (zone of microcracking at the tip of a propagating crack) of a brittle geomaterial. Samples of Carrara ... -
Nanomechanical properties of hydrated organic thin films
(Massachusetts Institute of Technology, 2007)Hydrated organic thin films are biological or synthetic molecularly thin coatings which impart a particular functionality to an underlying substrate and which have discrete water molecules associated with them. Such films ... -
NAPL (Non Aqueous Phase Liquid) source characterization based on dissolved contaminant concentrations
(Massachusetts Institute of Technology, 2000)Subsurface contamination frequently originates from spatially distributed sources of Non-Aqueous Phase Liquids (NAPLs). Such chemicals are typically persistent sources of groundwater contamination that are difficult to ... -
The narrow gauge railway versus the standard gauge
(Massachusetts Institute of Technology, 1888) -
National co-ordination of housing
(Massachusetts Institute of Technology, 1957) -
The national economic effects of breaching the Lower Snake River Dams
(Massachusetts Institute of Technology, 2000)The four Lower Snake River Dams have been providing irrigation, recreation, navigation, and electricity generation capabilities to residents of the Northwest since their completion in 1975. Meanwhile, salmon populations ... -
National environmental & sustainability strategies for automobiles in Thailand
(Massachusetts Institute of Technology, 1998) -
Natural abundance of ¹⁵N as a tool for assessing patterns of nitrogen loss from forest ecosystems
(Massachusetts Institute of Technology, 1999)Stable isotopes provide an integrated measure of the nitrogen cycling history of a site. Among ecosystems with contrasting nitrate loss patterns, the [delta]15 N of soil and plant material should be higher at sites with ... -
The natural and industrial cycling of indium in the environment
(Massachusetts Institute of Technology, 2012)Indium is an important metal whose production is increasing dramatically due to new uses in the rapidly growing electronics, photovoltaic, and LED industries. Little is known, however, about the natural or industrial cycling ... -
Natural and synthetic estrogens in wastewater treatment plant effuent and the coastal ocean
(Massachusetts Institute of Technology, 2013)Steroidal estrogens are potent endocrine disrupting chemicals that are naturally excreted by vertebrates (e.g., humans and fish) and can enter natural waters through the discharge of treated and raw sewage. Because estrogens ... -
Natural attenuation of chlorinated solvents at Ashumet Valley, Cape Cod, Massachusetts
(Massachusetts Institute of Technology, 1997) -
Natural attenuation of organophosphates in river systems: Chattahoochee River case study
(Massachusetts Institute of Technology, 2004)Three organophosphoric acid triesters, tributyl phosphate (TBP), tris(2-chloroethyl) phosphate (TCEP), and tris(2-butoxyethyl) phosphate (TBEP) have been detected in surface waters across the world, primarily the result ... -
Natural fiber reinforced aerated concrete : an experimental investigation
(Massachusetts Institute of Technology, 2013)The purpose of this study is to compare existing research with aerated concrete and fiber reinforcement to original experiments completed investigating the benefits of adding natural fiber tensile reinforcement to aerated ... -
Navigating congested cities : understanding urban mobility using new data sources
(Massachusetts Institute of Technology, 2016)Rapid urbanization and technological innovations sparked the generation of massive volumes of data that is continually improving in resolution. In particular, mobile phones, having reached penetration levels above 97% in ...
