An Evaluation Of The Efficiency Of Compartmented Alginate Fibres Encapsulating Rejuvenator As Asphalt Pavement Healing System, 2017 Dublin Institute of Technology
An Evaluation Of The Efficiency Of Compartmented Alginate Fibres Encapsulating Rejuvenator As Asphalt Pavement Healing System, Amir Tabakovic, Luke Schuyffel, Aleksandar Karac, Erik Schlangen
This paper explores the potential methods for evaluating a healing system for asphalt pavements. The healing system under investigation involves compartmented calcium-alginate fibres encapsulating an asphalt binder healing agent (rejuvenator). This system presents a novel method of incorporating rejuvenators into asphalt pavement mixtures. The compartmented fibres are used to distribute the rejuvenator throughout the pavement mixture, thereby overcoming some of the problems associated with alternate asphalt pavement healing methods, i.e., spherical capsules and hollow fibres. The asphalt healing efficiency methods to be evaluated in this paper include: (i) standard test methods for asphalt pavements, such as the Indirect Tensile ...
Tensile And Impact Behaviour Of Shape Memory Alloy Fibre Reinforced Engineered Cementitious Composites, 2017 The University of Western Ontario
Tensile And Impact Behaviour Of Shape Memory Alloy Fibre Reinforced Engineered Cementitious Composites, Mohamed Ali El-Sayed Mahmoud Ali
Electronic Thesis and Dissertation Repository
Extreme loading events such as impact, blast, and earthquakes have often led to partial or total collapse of structures, associated with economic and human life loss. Therefore, civil engineers have been seeking innovative materials and systems that would allow designing resilient and smart structures which can withstand such catastrophic events. Recently, engineered cementitious composites (ECC) and shape memory alloys (SMA) have emerged as strong contenders in the production of smart and resilient structural systems.
The aims of this study are to explore the possible synergy between ECC and SMA for developing a novel hybrid fibre-reinforced ECC incorporating randomly dispersed SMA ...
Design And Experimental Investigation Of 500kv Current Transformer Seismic Retrofit Utilizing Structure Rocking And Supplemental Damping With Self-Centering, Ilya S. Palnikov
Dissertations and Theses
Electrical substations perform a key role in electrical transmission and distribution; the ability for a substation to remain functional during and after a seismic event contributes significantly to the resilience of the clients supplied. Many legacy components currently installed in the main grid substations were designed with minimal consideration of lateral loads and are not qualified per IEEE693. One of the more critical high-voltage substation components that are vulnerable to earthquake damage is the 500kV freestanding current transformer (CT). The CT is particularly vulnerable due to the slenderness and mass distribution of the component. Current transformers are typically constructed from ...
Spatial Assessment Of Construction Waste Generated By Residential Buildings In Rural Areas, 2017 "Alexandru Ioan Cuza" University
Spatial Assessment Of Construction Waste Generated By Residential Buildings In Rural Areas, Florin C. Mihai, Adrian Grozavu
Florin C MIHAI
Application Of Ahp Method For Mapping Slope Geomorphic Phenomena, 2017 Alexandru Ioan Cuza University
Application Of Ahp Method For Mapping Slope Geomorphic Phenomena, Adrian Grozavu, Cristian V. Patriche, Florin C. Mihai
Florin C MIHAI
Performance Metrics For Depth-Based Signal Separation Using Deep Vertical Line Arrays, 2017 Portland State University
Performance Metrics For Depth-Based Signal Separation Using Deep Vertical Line Arrays, Gabriel Paul Kniffin, John Kenneth Boyle, Lisa Zurk, Martin Siderius
Lisa M. Zurk
A recent publication by McCargar and Zurk [(2013). J. Acoust. Soc. Am. 133(4), EL320–EL325] introduced a modified Fourier transform-based method for passive source depth estimation using vertical line arrays deployed below the critical depth in the deep ocean. This method utilizes the depth-dependent modulation caused by the interference between the direct and surface-reflected acoustic arrivals, the observation of which is enhanced by propagation through the reliable acoustic path. However, neither the performance of this method nor its limits of applicability have yet been thoroughly investigated. This paper addresses both of these issues; the first by identifying and analyzing ...
Free Vibrations Of Precast Modular Steel-Concrete Composite Railway Track Slabs, 2017 University of Birminham
Free Vibrations Of Precast Modular Steel-Concrete Composite Railway Track Slabs, Stephen Kimindiri Kimani, Sakdirat Kaewunruen
Bim Innovation Capability Programme Of Ireland, 2017 Dublin Institute of Technology
Bim Innovation Capability Programme Of Ireland, Barry Mcauley, Alan Hore, Roger West
The Irish Government has requested that Enterprise Ireland, an organisation responsible for the development and growth of Irish enterprises in world markets to actively promote the use of BIM in Ireland. This promotion has taken the form of an opportunity for Enterprise Ireland clients to apply for a grant under their BIM Enable and BIM Implementation schemes and also through their funding of the BIM Innovation Capability Programme (BICP) of Ireland. The BICP is a two-year project (2016-2018) which seeks to capture the capability of the Irish Construction Industry and the Higher Education Institutes to respond to the increased requirement ...
Case Study: The Influence Of Oil-Based Friction Modifier Quantity On Tram Braking Distance And Noise, 2017 Brno University of Technology
Case Study: The Influence Of Oil-Based Friction Modifier Quantity On Tram Braking Distance And Noise, Rondos Galas, Milan Omasta, Martin Klapka, Sakdirat Kaewunruen, Ivan Krupka, Martin Hartl
An Improved Method Of Arsenic (Iii) Removal By Reverse Osmosis Membrane, 2017 Marquette University
An Improved Method Of Arsenic (Iii) Removal By Reverse Osmosis Membrane, Yizhi Hou
Master's Theses (2009 -)
Arsenic is a Group 1 carcinogen as there is abundant research to support that ingestion of arsenic in drinking water and food can lead to liver, lung, kidney, or bladder cancer in humans. The recommend World Health Organization (WHO) arsenic standard in drinking water is 10 µg/L, while the Environmental Protection Agency's (EPA) Maximum Contaminant Level (MCL) of arsenic in drinking water is 10 µg/L. Globally, at least 40 million people face more than 10 µg/L arsenic contamination in their drinking water. As(III) (trivalent state, such as arsenite), and As(V) (pentavalent state, such as ...
Development And Application Of Hydraulic And Hydrogeologic Models To Better Inform Management Decisions, 2017 Utah State University
Development And Application Of Hydraulic And Hydrogeologic Models To Better Inform Management Decisions, Trinity L. Stout
All Graduate Theses and Dissertations
Water is one of the most important and limited resources in regions with little rainfall. As populations continue to grow, so does the need for water. Individuals in water management positions need to be well informed in order to avoid potential negative effects concerning the overall quality and amount of water available for both people and the environment. In order to provide better information for these individuals, computer models and mathematical relationships are commonly developed to estimate the outcome of different situations regarding surface water and groundwater. Along these lines, this study focused on two modeling studies that provide information ...
Resolving Spatial And Temporal Variability In Dissolved Organic Matter Characteristics Within Combined Agricultural And Stormwater Conveyances, Bryce A. Mihalevich
All Graduate Theses and Dissertations
In many urban areas, stormwater runoff can threaten the ecological health of streams and downstream water bodies. Due to the increased impervious nature of urban landscapes, runoff is more “flashy” and as a result, high concentrations of pollutants can be transported in shorter periods of time than in more natural environments. One pollutant of concern is dissolved organic matter (DOM). DOM is important within aquatic ecosystems, but excess amounts can cause depletion in dissolved oxygen concentrations and can negatively affect aquatic organisms. This study investigated changes in DOM quantity and sources within the Northwest Field Canal (NWFC), an urban water ...
Trace Metals In Stormwater: Alternative Best Management Practices, 2017 Portland State University
Trace Metals In Stormwater: Alternative Best Management Practices, Jennifer Ibeth Mora
Civil and Environmental Engineering Master's Project Reports
Heavy metals, such as copper (Cu) and zinc (Zn), are considered hazardous in natural waters due to their toxicity and non-biodegradability. The focus of this study is to use batch experiments to investigate the heavy metal (Cu and Zn) removal efficiency of perlite and EarthliteTM to improve in-situ filtration systems for stormwater catchment basins. Stormwater samples from two field sites in Portland, OR, chosen to represent a high-use commercial site and high-traffic urban road, were characterized to inform experimental design and compare to values found in literature. The Linear, Freundlich, and Langmuir isotherm models were used to describe equilibrium ...
Laser Doppler Velocimetry Using A Modified Computer Mouse, 2017 Portland State University
Laser Doppler Velocimetry Using A Modified Computer Mouse, Edward D. Zaron
Edward D. Zaron
A computer mouse has been modified for use as a low-cost laser Doppler interferometer and used to measure the two-component fluid velocity of a flowing soap film. The mouse sensor contains two vertical cavity surface emitting lasers, photodiodes, and signal processing hardware integrated into a single package, approximately 1 cm2 in size, and interfaces to a host computer via a standard USB port. Using the principle of self-mixing interferometry, whereby laser light re-enters the laser cavity after being scattered from a moving target, the Doppler shift and velocity of scatterers dispersed in the flow are measured. Observations of the boundary ...
M2 Internal Tides And Their Observed Wavenumber Spectra From Satellite Altimetry, 2017 NASA Goddard Space Flight Center
M2 Internal Tides And Their Observed Wavenumber Spectra From Satellite Altimetry, Richard D. Ray, Edward D. Zaron
Edward D. Zaron
A near-global chart of surface elevations associated with the stationary M2 internal tide is empirically constructed from multimission satellite altimeter data. An advantage of a strictly empirical mapping approach is that results are independent of assumptions about ocean wave dynamics and, in fact, can be used to test such assumptions. A disadvantage is that present-day altimeter coverage is only marginally adequate to support mapping such short-wavelength features. Moreover, predominantly north–south ground-track orientations and contamination from nontidal oceanographic variability can lead to deficiencies in mapped tides. Independent data from Cryosphere Satellite-2 (CryoSat-2) and other altimeters are used to test ...
Functionality Of Openair Package In Air Pollution Assessment And Modeling — A Case Study Of Krakow, 2017 AGH University o Science and Technology
Functionality Of Openair Package In Air Pollution Assessment And Modeling — A Case Study Of Krakow, Adriana Szulecka, Robert Oleniacz, Mateusz Rzeszutek
Streambank Erosion Mapping On The Nottoway River Using Gps-Based Above-Water Video, 2017 University of Tennessee, Knoxville
Streambank Erosion Mapping On The Nottoway River Using Gps-Based Above-Water Video, Emine Fidan
Pursuit - The Journal of Undergraduate Research at the University of Tennessee
This project concerns the development of streambank erosion maps on military installations utilizing GPS-based above-water video mapping and image georeferencing techniques. The river mapped was the Nottoway River at the Fort Pickett military installation on October 10-11, 2015. Kayak-mounted above-water cameras were utilized to capture georeferenced images of streambank erosion. These GIS-based erosion classifications were utilized to develop erosion maps for determining streambank erosion conditions along the river. Areas of high erosion were identified as about two percent of the river (2167 ft. of streambank length). These maps allow for the opportunity to revisit the sites to determine changes in ...
Methodologies For Designing Railway Plastic And Composite Sleepers, 2017 China Academy of Railway Sciences
Methodologies For Designing Railway Plastic And Composite Sleepers, Ruilin You, Erica Andrade Silva, Sakdirat Kaewunruen
Probability Of Detection In Structural Health Monitoring, 2017 Iowa State University
Probability Of Detection In Structural Health Monitoring, William Q. Meeker
William Q Meeker
Structural Health Monitoring (SHM) is being proposed to replace traditional scheduled NDE inspections. This is raising questions about how to quantify Probability of Detection (POD) and whether the POD statistical methods of MIL-HDBK 1823 can still be used. The answer depends on the application, the nature of the SHM information, and how that information is mapped into a detect/not-detect decision. This talk will outline some of the issues involved in characterizing POD for different kinds of SHM applications.
Damage Detection On Mesosurfaces Using Distributed Sensor Network And Spectral Diffusion Maps, 2017 Iowa State University
Damage Detection On Mesosurfaces Using Distributed Sensor Network And Spectral Diffusion Maps, Venkatesh Chinde, Liang Cao, Umesh Vaidya, Simon Laflamme
In this work, we develop a data-driven method for the diagnosis of damage in mesoscale mechanical structures using an array of distributed sensor networks. The proposed approach relies on comparing intrinsic geometries of data sets corresponding to the undamaged and damaged states of the system. We use a spectral diffusion map approach to identify the intrinsic geometry of the data set. In particular, time series data from distributed sensors is used for the construction of diffusion maps. The low dimensional embedding of the data set corresponding to different damage levels is obtained using a singular value decomposition of the diffusion ...