Browsing Department of Civil and Environmental Engineering by Title
Now showing items 2215-2234 of 3507
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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 ... -
The nature and effects of hiring practices in the construction industry
(Massachusetts Institute of Technology, 1959) -
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 ... -
Near and far field models of external fluid mechanics of Ocean Thermal Energy Conversion (OTEC) power plants
(Massachusetts Institute of Technology, 2013)The world is facing the challenge of finding new renewable sources of energy - first, in response to fossil fuel reserve depletion, and second, to reduce greenhouse gas emissions. Ocean Thermal Energy Conversion (OTEC) can ... -
Near-optimal data-driven approximation schemes for joint pricing and inventory control models
(Massachusetts Institute of Technology, 2018)The thesis studies the classical multi-period joint pricing and inventory control problem in a data-driven setting. In the problem, a retailer makes periodic decisions of the prices and inventory levels of an item that the ... -
The need for private sector-public sector collaborative planning in Singapore
(Massachusetts Institute of Technology, 1985) -
A needs-based approach to activity generation for travel demand analysis/
(Massachusetts Institute of Technology, 2012)This thesis develops a needs-based framework for behavioral enhancement of conventional activity-based travel demand models. Operational activity-based models specify activity generation models based on empirical considerations ... -
Negative and Positive Transcriptional Regulation by Thyroid Hormone Receptor Isoforms
(The Endocrine Society (USA), 1990)Negative and positive regulations by multiple forms of thyroid hormone receptors. -
Negotiating the neighborhood : modeling the relationship between built environment and transit choice
(Massachusetts Institute of Technology, 2014)This thesis examines the relationship between land use and built environment variables and peoples' mode choice for home-based work trips. Many studies recommend that factors like densification, mixed land use, optimal ... -
Nepal drinking water quality assessment : nitrates and ammonia
(Massachusetts Institute of Technology, 2000) -
Nervi's design and construction methods for two thin-shell structures : the Leverone Field House and Thompson Arena
(Massachusetts Institute of Technology, 2017)This thesis studies two major thin-shell concrete structures by Pier Luigi Nervi (1891- 1979) - the Leverone Field House and Thompson Arena. These two similar parabolic vaults are two of the few international structures ... -
A .net based resource sharing framework
(Massachusetts Institute of Technology, 2006)This thesis presents an Internet resource sharing architecture. It allows users to access and utilize unused computer resources, such as CPU cycles and storage, without an expert's knowledge. It achieves this by providing ... -
Network design and fleet allocation model for vessel operation
(Massachusetts Institute of Technology, 2006)Containership operators in the U.S. are confronted with a number of problems in the way they make critical fleet allocation decisions to meet the increase of shippers' demands. Instead of the empirical approach, this ... -
Network design for integrated vehicle-sharing and public transportation service
(Massachusetts Institute of Technology, 2015)Vehicle sharing services have become a major urban transportation mode. One-way vehicle sharing service facilitates access to public transportation systems, thereby addressing the first and last mile challenges and creating ... -
Network knowledge and route choice
(Massachusetts Institute of Technology, 2002)Models of urban traveler route choice are reviewed in the context of Intelligent Transportation Systems, particularly Advanced Traveler Information S ystems. Existing models suffer from assumptions of perfect information ...
