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17,972 full-text articles. Page 1 of 384.

Pavements Analysis And Design, Yang Huang, Kamyar Mahboub 2016 University of Kentucky

Pavements Analysis And Design, Yang Huang, Kamyar Mahboub

Kamyar C. Mahboub

No abstract provided.


6th International Conference On Recent Advances In Geotechnical Earthquake Engineering And Soil Dynamics, Shamsher Prakash 2016 Missouri University of Science and Technology

6th International Conference On Recent Advances In Geotechnical Earthquake Engineering And Soil Dynamics, Shamsher Prakash

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

No abstract provided.


Commuting By Customized Bus: A Comparative Analysis With Private Car And Conventional Public Transport In Two Cities, Tao Liu, Avishai Ceder, Romain Bologna, Benjamin Cabantous 2016 University of Auckland

Commuting By Customized Bus: A Comparative Analysis With Private Car And Conventional Public Transport In Two Cities, Tao Liu, Avishai Ceder, Romain Bologna, Benjamin Cabantous

Journal of Public Transportation

Commuting is a major component in the creation of traffic and travel problems. Thus, more attention should be given to its practice. Private car (PC) transport, the dominant mode of commuting in most of the world’s major cities, creates traffic-related social problems such as traffic congestion, traffic fatalities and injuries, and adverse environmental impacts. This study proposes a novel commuting travel mode—a customized bus (CB) transit system that provides advanced, personalized, and flexible demand-interactive minibus service using Internet, telephone, and smartphone apps. The aim was to assess and compare the performance of CB with PC and with conventional ...


Influence Of Socio-Demography And Operating Streetscape On Last-Mile Mode Choice, M. Meng, P. P. Koh, Y. D. Wong 2016 TUM CREATE

Influence Of Socio-Demography And Operating Streetscape On Last-Mile Mode Choice, M. Meng, P. P. Koh, Y. D. Wong

Journal of Public Transportation

This study investigated how personal and operational factors (travel distance and streetscape) influence traveler mode choice decisions for the last-mile home-bound trip stage from rail transit stations. Personal factors include the socio-demography of travelers, and attributes of the streetscape include the built environment (degree of areal development), prevalence of cycling, availability of short-range transport modes, and walking/cycling infrastructure. Interviewers randomly intercepted pedestrians to administer a mode choice survey at five rail transit station exits and engaged all available cyclists at bicycle parking areas in the vicinity of stations in Singapore. A multimodal logit regression model revealed a significant relationship ...


Factors Influencing Demand For Buses Powered By Alternative Energy Sources, Janer Galván, Victor Cantillo, Julian Arellana 2016 Universidad del Norte

Factors Influencing Demand For Buses Powered By Alternative Energy Sources, Janer Galván, Victor Cantillo, Julian Arellana

Journal of Public Transportation

Transit buses consume high amounts of fossil fuels, with the consequent release of greenhouse gases into the atmosphere. In recent decades, much effort has been concentrated on the development of cleaner fuels to mitigate this externality. However, market shares for cleaner-fueled buses are still modest, which is why it is relevant to evaluate the aspects influencing their acceptance. This article presents an econometric model to evaluate factors influencing demand for transit buses in Colombia powered by cleaner fuels. For this purpose, a stated preference survey was applied to public transportation entrepreneurs. Results suggest that the target population considers acquisition cost ...


On The Observability Of Bottom Topography From Measurements Of Tidal Sea Surface Height, Edward D. Zaron 2016 Portland State University

On The Observability Of Bottom Topography From Measurements Of Tidal Sea Surface Height, Edward D. Zaron

Civil and Environmental Engineering Faculty Publications and Presentations

of whether features of the ocean bottom topography can be identified from measurements of water level is investigated using a simplified one-dimensional barotropic model. Because of the nonlinear dependence of the sea surface height on the water depth, a linearized analysis is performed concerning the identification of a Gaussian bump within two specific depth profiles, (1) a constant depth domain, and, (2) a constant depth domain adjoining a near-resonant continental shelf. Observability is quantified by examining the estimation error in a series of identical-twin experiments varying data density, tide wavelength, assumed (versus actual) topographic correlation scale, and friction. For measurements ...


Performance Of Reinforced Concrete Beams Strengthened With Mechanically-Fastened Composite System Under Corrosive Environment, Amna Zaid Suwaid Al Nassibi 2016 United Arab Emirates University

Performance Of Reinforced Concrete Beams Strengthened With Mechanically-Fastened Composite System Under Corrosive Environment, Amna Zaid Suwaid Al Nassibi

Theses

This study examines the effect of corrosion exposure on the flexural response of reinforced concrete (RC) beams strengthened with a powder-actuated fastened (PAF) composite system. Twenty-one RC beams were constructed and tested to failure under four-point bending. The corroded beams were subjected to 30, 60, and 100 days of accelerated corrosion that corresponded to measured tensile steel mass losses of 6, 11, and 18%, respectively. Other test parameters included width of the fiber reinforced polymer (FRP) composite strip, fastener length, and number of fasteners rows. For the uncorroded beams, the PAF-FRP system resulted in up to 24% increase in beam ...


Factors For Improved Fish Passage Waterway Construction, David N. Sillars, Hamid Moradkhani, Nicholas Tymvios, Trevor D. Smith 2016 Oregon State University

Factors For Improved Fish Passage Waterway Construction, David N. Sillars, Hamid Moradkhani, Nicholas Tymvios, Trevor D. Smith

Hamid Moradkhani

Streambeds are important fish passageways in Oregon; they provide for the necessary habitats and spawning cycles of a healthy fish population. Oregon state law requires that hydraulic structures located in water properly provide fish passage. Increasingly stringent state and federal regulations apply to these fish passageways, and designers must become more cognizant of conditions over a range of flows to accommodate fish movement and avoid expensive structural failure of these passageways. Fish passage structures are built when roads cross streambeds and may include culverts, or bridges. When these structures are built, the streambeds are re-created using a technique called “roughened ...


Assessing The Impact Of Cmip5 Climate Multi-Modeling On Estimating The Precipitation Seasonality And Timing, Mehmet Demirel, Hamid Moradkhani 2016 Portland State University

Assessing The Impact Of Cmip5 Climate Multi-Modeling On Estimating The Precipitation Seasonality And Timing, Mehmet Demirel, Hamid Moradkhani

Hamid Moradkhani

This paper investigates the effect of a Bayesian Model Averaging (BMA) method on simulated precipitation over the Columbia River Basin using two statistically downscaled climate datasets, i.e., Bias-Correction Spatial Disaggregation (BCSD) and Multivariate Adaptive Constructed Analogs (MACA). To this end daily observed and simulated precipitation are used to calculate different indices focusing solely on seasonality, event-timing, and variability in timing (persistence) of the precipitation. The climate model weights are estimated for each cell (6 × 6 km) of the Columbia River Basin using daily time series for the historical period 1970–1999 from the ten Global Climate Models (GCMs) participating ...


Removal Of Total Organic Carbon (Toc)/Dissolved Organic Carbon (Doc) And Trihalomethane Formation Potentials (Thmfps) From Surface Water Using Prebiofilters, George Yuzhu Fu, Peter D. Rogers 2016 Georgia Southern University

Removal Of Total Organic Carbon (Toc)/Dissolved Organic Carbon (Doc) And Trihalomethane Formation Potentials (Thmfps) From Surface Water Using Prebiofilters, George Yuzhu Fu, Peter D. Rogers

George Yuzhu Fu

Biofiltration has long been used to treat drinking water in Europe and is becoming more widespread in North America. Pre-biofilters, or biofilters that operate as the first unit in a surface water treatment process train, are a cost-effective pretreatment for conventional surface water treatment and provide consistent downstream water quality. This paper describes a study that investigated the potential to remove total organic carbon (TOC)/dissolved organic carbon (DOC), and trihalomethane formation potential (THMFP) from surface water using prebiofilters. Furthermore, the impact of different molecular weight fractions of TOC/DOC and THMFPs in the surface water and the filtrates from ...


Removal Of Disperse Red 1 From An Aqueous Solution By Fungus Aspergillus Niger, George Yuzhu Fu, T. Viraraghaven 2016 Georgia Southern University

Removal Of Disperse Red 1 From An Aqueous Solution By Fungus Aspergillus Niger, George Yuzhu Fu, T. Viraraghaven

George Yuzhu Fu

In this study, removal of Disperse Red 1 from an aqueous solution by biosorption on dead fungus, Aspergillus niger was investigated. Effective pretreatment for increasing the biosorption capacity was studied by using different pretreatment methods. Among them, NaOH pretreatment was the most effective. The effective initial pH for the maximum dye adsorption by fungal biomass was 4.0. Kinetic studies showed that the biosorption of Disperse Red 1 on fungal biomass was a slow process and the binding between fungal biomass and the molecules of Disperse Red 1 was weak in the initial period. Equilibrium was reached in 48 h ...


Tides And The Swot Mission: Transition From Science Definition Team To Science Team, Brian K. Arbic, Florent Lyard, Aurelien Ponte, Richard D. Ray, James G. Richman, Jay F. Shriver, Edward Zaron, Zhongxiang Zhao 2016 University of Michigan - Ann Arbor

Tides And The Swot Mission: Transition From Science Definition Team To Science Team, Brian K. Arbic, Florent Lyard, Aurelien Ponte, Richard D. Ray, James G. Richman, Jay F. Shriver, Edward Zaron, Zhongxiang Zhao

Edward D. Zaron

As the SWOT wide-swath satellite altimeter mission transitions from the Science Definition Team to the Science Team, it is an opportune time to review the progress that has been made with respect to tides, and the work remaining to be done. As with previous altimeter missions, tides present both an opportunity and a challenge for the SWOT mission. The TOPEX/Jason class of altimeters have allowed high-accuracy mapping of open-ocean barotropic tides over their coverage latitudes (66°S to 66°N), but the inter-track spacing of these missions (~150 km) has limited their ability to map smaller-scale features such as ...


Recent Progress In Performance Evaluations And Near Real-Time Assessment Of Operational Ocean Products, Fabrice Hernandez, Edward Blockley, Gary B. Brassington, Fraser Davidson, Prasanth Divakaran, Marie Drévillon, Shiro Ishizaki, Marcos Garcia-Sotillo, Patrick J. Hogan, Priidik Lagemaa, Bruno Levier, Matthew Martin, Avichal Mehra, Christopher Mooers, Nicolas Ferry, Andrew Ryan, Charly Regnier, Alistair Sellar, Gregory C. Smith, Sarantis Sofianos, Todd Spindler, Gianluca Volpe, John Wilkin, Edward Zaron, Aijun Zhang 2016 Institut de Recherche pour le Développement

Recent Progress In Performance Evaluations And Near Real-Time Assessment Of Operational Ocean Products, Fabrice Hernandez, Edward Blockley, Gary B. Brassington, Fraser Davidson, Prasanth Divakaran, Marie Drévillon, Shiro Ishizaki, Marcos Garcia-Sotillo, Patrick J. Hogan, Priidik Lagemaa, Bruno Levier, Matthew Martin, Avichal Mehra, Christopher Mooers, Nicolas Ferry, Andrew Ryan, Charly Regnier, Alistair Sellar, Gregory C. Smith, Sarantis Sofianos, Todd Spindler, Gianluca Volpe, John Wilkin, Edward Zaron, Aijun Zhang

Edward D. Zaron

Operational ocean forecast systems provide routine marine products to an ever-widening community of users and stakeholders. The majority of users need information about the quality and reliability of the products to exploit them fully. Hence, forecast centres have been developing improved methods for evaluating and communicating the quality of their products. Global Ocean Data Assimilation Experiment (GODAE) OceanView, along with the Copernicus European Marine Core Service and other national and international programmes, has facilitated the development of coordinated validation activities among these centres. New metrics, assessing a wider range of ocean parameters, have been defined and implemented in real-time. An ...


On The Observability Of Bottom Topography From Measurements Of Tidal Sea Surface Height, Edward D. Zaron 2016 Portland State University

On The Observability Of Bottom Topography From Measurements Of Tidal Sea Surface Height, Edward D. Zaron

Edward D. Zaron

of whether features of the ocean bottom topography can be identified from measurements of water level is investigated using a simplified one-dimensional barotropic model. Because of the nonlinear dependence of the sea surface height on the water depth, a linearized analysis is performed concerning the identification of a Gaussian bump within two specific depth profiles, (1) a constant depth domain, and, (2) a constant depth domain adjoining a near-resonant continental shelf. Observability is quantified by examining the estimation error in a series of identical-twin experiments varying data density, tide wavelength, assumed (versus actual) topographic correlation scale, and friction. For measurements ...


Water Resources Systems Analysis: A Bright Past And Challenging But Promising Future, David E. Rosenberg, Kaveh Madani 2016 Utah State University

Water Resources Systems Analysis: A Bright Past And Challenging But Promising Future, David E. Rosenberg, Kaveh Madani

David E. Rosenberg

No abstract provided.


Water Resources Systems Analysis: A Bright Past And Challenging But Promising Future, David E. Rosenberg, Kaveh Madani 2016 Utah State University

Water Resources Systems Analysis: A Bright Past And Challenging But Promising Future, David E. Rosenberg, Kaveh Madani

David E. Rosenberg

No abstract provided.


Water Resources Systems Analysis: A Bright Past And Challenging But Promising Future, David E. Rosenberg, Kaveh Madani 2016 Utah State University

Water Resources Systems Analysis: A Bright Past And Challenging But Promising Future, David E. Rosenberg, Kaveh Madani

David E. Rosenberg

No abstract provided.


Heterogeneous Residential Water And Energy Linkages And Implications For Conservation And Management, Adel Abdallah, David E. Rosenberg 2016 Utah State University

Heterogeneous Residential Water And Energy Linkages And Implications For Conservation And Management, Adel Abdallah, David E. Rosenberg

David E. Rosenberg

This paper develops an integrated approach to model heterogeneous household water and energy use and their linkages. The approach considers variations in behavioral and technological water and energy use factors that affect U.S. indoor residential water and energy use for toilets, showers, faucets, clothes washers, and dishwashers. The study uses a recent, large, national, disaggregated household water use data set collected from 11 cities, as well as national energy data on water heater efficiency and setpoint/intake temperatures. First, probability distributions of water and energy use factors are identified and correlated. Then, Monte Carlo simulations are used to calculate ...


Heterogeneous Residential Water And Energy Linkages And Implications For Conservation And Management, Adel Abdallah, David E. Rosenberg 2016 Utah State University

Heterogeneous Residential Water And Energy Linkages And Implications For Conservation And Management, Adel Abdallah, David E. Rosenberg

David E. Rosenberg

This paper develops an integrated approach to model heterogeneous household water and energy use and their linkages. The approach considers variations in behavioral and technological water and energy use factors that affect U.S. indoor residential water and energy use for toilets, showers, faucets, clothes washers, and dishwashers. The study uses a recent, large, national, disaggregated household water use data set collected from 11 cities, as well as national energy data on water heater efficiency and setpoint/intake temperatures. First, probability distributions of water and energy use factors are identified and correlated. Then, Monte Carlo simulations are used to calculate ...


Heterogeneous Residential Water And Energy Linkages And Implications For Conservation And Management, Adel Abdallah, David E. Rosenberg 2016 Utah State University

Heterogeneous Residential Water And Energy Linkages And Implications For Conservation And Management, Adel Abdallah, David E. Rosenberg

David E. Rosenberg

This paper develops an integrated approach to model heterogeneous household water and energy use and their linkages. The approach considers variations in behavioral and technological water and energy use factors that affect U.S. indoor residential water and energy use for toilets, showers, faucets, clothes washers, and dishwashers. The study uses a recent, large, national, disaggregated household water use data set collected from 11 cities, as well as national energy data on water heater efficiency and setpoint/intake temperatures. First, probability distributions of water and energy use factors are identified and correlated. Then, Monte Carlo simulations are used to calculate ...


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