Index Catalog // ScholarsArchive@OSU

Climate Change Impacts to Estuarine Hydrodynamics: Tools, Methodologies, and Predictions

Creator:: Parker, Kai A.
Abstract:: Coastal communities in the U.S. Pacific Northwest (PNW) are rapidly engaging with the idea that hazards and environmental pressures are changing and may be characteristically different in the near future. This has led to a need for scientific knowledge and tools that can help coastal communities prepare and build resilience...
Resource Type:: Dissertation
Full Text:: David F. Hill Coastal communities in the U.S. Pacific Northwest (PNW) are rapidly engaging with

Performance-Based Design Methodology for Using Emergent Vegetation to Mitigate Wave Overtopping

Creator:: Ostrow, Kayla
Abstract:: To facilitate the design of Natural and Nature-Based Features (NNBF) for flood protection, this thesis expands an existing engineering design methodology to NNBF systems. The existing approach is a Level III reliability method for the performance-based design of traditional coastal engineering systems. The expanded methodology incorporates uncertainties inherent to both...
Resource Type:: Masters Thesis
Full Text:: David Bernell, for their time and feedback. This project has allowed me to learn from and work with

A Review of Current State Department of Transportation Practice for Promoting and Documenting the Safety of Field Employees

Creator:: Barlow, Zachary Wesley
Abstract:: State Departments of Transportation (DOTs) are the primary owners of roadway infrastructure in the United States. Many of the employees of state DOTs work on roadway work sites, putting them at disproportionately higher risks of injury or fatality. A review of the literature determined that a combination of policies, standards,...
Resource Type:: Masters Thesis
Full Text:: : ___________________________________________________ David S. Hurwitz State Departments of Transportation (DOTs) are the primary owners of

Depth estimation and frontal imaging via X-band marine radar

Creator:: Honegger, David Andrew
Abstract:: This dissertation focuses on two core aspects of remote sensing: (a) interpretation of the remotely sensed data to identify and characterize sea surface features of interest, and (b) the quantitative analysis of previously characterized features to produce robust estimates of geophysical variables. Specifically, these aspects are addressed in the context...
Resource Type:: Dissertation
Full Text:: quasi-continuous marine radar image time series. c®Copyright by David Andrew Honegger March 12

Aircraft washrack wastes : their characteristics and treatment

Creator:: Evans, David Roland
Abstract:: Oils, greases, and grit which collect on an aircraft during flight are removed on the U. S. Air Force washracks using an alkaline, water-base cleaner. Waste-flows from these washracks may include in addition to free oils, emulsified oils, and alkaline, water-base cleaners several other constituents such as acid skin brightners,...
Resource Type:: Masters Thesis
Full Text:: treatment AN ABSTRACT OF THE THESIS OF DAVID ROLAND EVANSL 2ND LT., USAF for the Master of Science

Assessing the seismic performance of corroding RC bridge columns

Creator:: Guo, Yisen
Abstract:: Corrosion of reinforcement is recognized as the predominant factor that limits the service life of reinforced concrete (RC) structures exposed to aggressive environments. This corrosion deterioration can lead to damage resulting in capacity loss or even failure. For structures exposed to coastal marine environments or deicing or anti-icing applications, this...
Resource Type:: Masters Thesis
Full Text:: : ________________________________________________________ David Trejo

In situ measurement of the benthal oxygen requirements of tidal flat deposits

Creator:: Crook, Gene Ray
Abstract:: In situ light and dark planktonic and benthal respirometers were used to measure the oxygen requirements of Yaquina estuary water and benthal deposits. Respirometer devices were constructed so that actual conditions of mixing could be simulated and benthal deposit disturbance would be minimized. A mathematical model of a benthal respirometer...
Resource Type:: Masters Thesis
Full Text:: THE BENTHAL OXYGEN REQUIREMENTS OF TIDAL FLAT DEPOSITS Abstract approved: Dr. David A. Bella In

Incipient resuspension of silt-clay deposits in oscillatory and unidirectional flows

Creator:: Talebbeydokhti, Nasser
Abstract:: Incipient motion of cohesive sediment and the role of flow parameters were investigated for separate and combined unidirectional and oscillatory flows. Sediment from Sturgeon Lake, mainly silt and clay with organic matter, was used as bed material In recirculating and wave flumes. Bench-type experiments indicated that when the submerged sediment...
Resource Type:: Dissertation
Full Text:: : Peter C. Klingemaig Incipient motion of cohesive sediment and the role of flow parameters were

Spatial, diel and seasonal variations in dissolved oxygen and temperature within a stratified lake

Creator:: Smith, Stanley Allan
Abstract:: Spatial, diel and seasonal variations in dissolved oxygen and temperature were measured in Triangle Lake, Oregon. Spatial dissolved oxygen and temperature variations measured in the stratified lake are presented to illustrate the horizontal uniformity of the lake and to demonstrate the applicability of the one dimensional assumption for sampling and...
Resource Type:: Masters Thesis
Full Text:: approved: Redacted for Privacy Dr. David A. Bella Spatial, diel and seasonal variations in dissolved

Hydrology studies applicable to Oregon

Creator:: Johnson, Arthur Fayette
Resource Type:: Masters Thesis
Full Text:: requireraents for the Degree of MASTER OF SCIENCE by Arthur Fayette Johnson June, 193:3 APPROVED

Design and fatigue behavior of near-surface mounted CFRP bars for shear strengthening of RC bridge girders

Creator:: Johnson, Brandon Ang
Abstract:: Carbon fiber reinforced polymer (CFRP) materials are emerging as an effective means of strengthening and rehabilitating bridges. Near surface mounting (NSM) is a newer technique for application of CFRP for retrofitting of bridge members that provides advantages over conventional strengthening techniques. The technique is still new and uncertainties remain regarding...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Brandon Ang Johnson

Pressure distribution around a circular cylinder resting on a flat boundary in an oscillating fluid

Creator:: Johnson, Ronald Ernest
Abstract:: This study was undertaken to provide information needed in the design of ocean outfalls. A review of past investigations concerning forces on submerged objects is presented. Objects independent of any boundary and cylinders in boundary contact are considered. A solution for pressure distribution about a circular cylinder resting on a...
Resource Type:: Masters Thesis
Full Text:: on a flat boundary in an oscillating fluid AN ABSTRACT OF THE THESIS OF Ronald Ernest Johnson for

A portable geographic information system used to develop an integrated facility management support system for a military installation

Creator:: Kennedy, David R. (David Richard)
Abstract:: The combination of increased training tempo due to military base closures and the reduction in military budgets have placed a severe burden on the infrastructure at many military installations and emphasized the need for an integrated facility management support system. This research involved linking existing facility, environmental, and operational data...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF David R. Kennedy for the degree of

The use of LiDAR to identify forest transportation networks

Creator:: Beck, Storm J. C.
Abstract:: The production of high value non-conventional products, such as long utility poles; or the production of low value bulky products, such as chips or grindings; provide opportunities for forest owners to increase value from their forests. The transport of these products requires the use of specialized trucks and trailers. However,...
Resource Type:: Masters Thesis
Full Text:: , and Dr. David Myrold for their continuing support and encouragement throughout this entire process

Evaluation of Cycling Behavior: Factors that Influence Bicyclists’ Comprehension, Comfort, and Stress

Creator:: Cobb, Douglas P.
Abstract:: Travel demand has increased due to population growth, increase of vehicle ownership, and development patterns resulting in greater levels of congestion, pollution, and crash frequency. One approach to demand management is to increase the share of trips made by bicycles. With the increase in bicycling rates, there is a critical...
Resource Type:: Dissertation
Full Text:: David Hurwitz Travel demand has increased due to population growth, increase of vehicle ownership

Transportation Infrastructure to Support Bicycling in Dense Urban Environments : Design and Operational Considerations for Bicycle Lanes in Proximity to Commercial Vehicle Loading Zones

Creator:: Ghodrat Abadi, Masoud
Abstract:: While sophisticated plans have been adopted nationally and globally to increase bicycling’s share of daily commutes, safety concerns have negatively impacted targeted bicycling growth. Specifically, truck traffic plays a pivotal role in bicyclists’ perceptions of safety and comfort, because of the severe consequences of bicycle-truck collisions. Several types of engineering...
Resource Type:: Dissertation
Full Text:: : ______________________________________________________ David S. Hurwitz While sophisticated plans have been adopted nationally and globally to

Owner's Role in Brownfield Remediation : The Brownfield Experts' Perspective

Creator:: Saberiyan, Amireh G.
Abstract:: Former industrial or commercial sites that have been left unused are typically referred to as brownfield sites, or simply, brownfields. Many communities have such properties that are abandoned, idle or underused. Despite public efforts to facilitate brownfields revitalization projects, the rate of remediation remains unexpectedly slow. Efforts to resolve this...
Resource Type:: Dissertation
Full Text:: : ________________________________________________________________ David N. Sillars Former industrial or commercial sites that have been left unused are

Construction risks allocation : optimal risk allocation decision support model

Creator:: Alsalman, Ali Abdullah
Abstract:: It has been suggested that projects in the construction industry are subject to risks more than other industries. However, there is often little parity in allocation of risks in the construction industry. Usually, project participants allocate risks by aversion where owners tend to shift risks to the primary contractor, who...
Resource Type:: Dissertation
Full Text:: approved: _________________________________ David N

Impact of Bicycle Rolling Stop Laws on Safety-Relevant Behaviors in the Pacific Northwest

Creator:: Woodside, Jasmin Barnes
Abstract:: Previous research has found some bicyclists disregard circular red indications and stop signs. Possible justifications include a desire to increase safety, save energy, save time, and increase visibility. Because of this, many bicyclists feel as though stopping at stop signs, especially in the absence of conflicting vehicular traffic, is an...
Resource Type:: Masters Thesis
Full Text:: Pacific Northwest Abstract approved: ____________________________________________ David S

Assessing the Impact of Three Intersection Treatments on Bicyclist Safety

Creator:: Scott-Deeter, Logan K..
Abstract:: Bicyclist safety at urban intersections is a critical element for encouraging an increase in bicycle commuting. With bicycle injury and fatality rates rising due to collisions with vehicles at signalized intersections, increasing the safety of riders continues to be an important consideration when promoting this mode of transportation. Previous research...
Resource Type:: Masters Thesis
Full Text:: Safety Abstract approved: ______________________________________________________ David S

Driver Distraction from Unmanned Aerial Systems: Evidence, Policy, and Mitigation

Creator:: Barlow, Zachary W.
Abstract:: Unmanned aerial systems (UASs), more commonly known as drones, have recently achieved commercial success for many public and private applications. As with all emerging technologies, new safety concerns and conflicts with existing paradigms are likely to arise. Many potential applications of UASs will result in their operation near roadway infrastructure,...
Resource Type:: Dissertation
Full Text:: : ______________________________________________________ David S. Hurwitz Unmanned aerial systems (UASs), more commonly known as drones, have

Pentacholorophenol reductive dechlorination and the significance of temperature : development of an interceptor trench technology

Creator:: Cole, Jason David
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Jason David Cole for the

Optimization of feeding schedules for coho salmon in the hatchery environment

Creator:: Corey, Philip David
Abstract:: A growth model is developed for coho salmon which accounts for temperatures and feeding rates typically encountered in fish hatchery operation. Feeding rates utilized by the model ranged from maintenance to maximum utilizable rations. The model is derived from an empirical equation for maximum growth rate, and a theoretical equation...
Resource Type:: Dissertation
Full Text:: Salmon in the Hatchery Environment Redacted for privacy Abstract approved: David A. Bella A growth

Measurement of the rates of reductive dechlorination of chlorinated phenols

Creator:: Nicholson, David K.
Abstract:: Knowledge of a compound's degradation pathway is crucial to the assessment of risk at contaminated sites. Pentachlorophenol and its metabolic products can serve as model compounds to study the fate and transport of halogenated aromatic compounds in the environment. Acclimation of anaerobic sewage sludge to pentachlorophenol produced a microbial consortium...
Resource Type:: Masters Thesis
Full Text:: chlorinated phenols AN ABSTRACT OF THE THESIS OF David K. Nicholson for the degree of Master of Science in

Seasonal variations in tidal dynamics, water quality and sediments in the Alsea Estuary

Creator:: McKenzie, David Roller
Abstract:: During 1973 data was collected to analyze the seasonal variations of the tidal dynamics, water quality and sediments of the Alsea Estuary. A summary of historical information with a list of all known alterations to the estuary was made. A complete physical description, including the geographical setting and mixing classification...
Resource Type:: Masters Thesis
Full Text:: sediments in the Alsea Estuary AN ABSTRACT OF THE THESIS OF DAVID ROLLE!". MCKENZIE for the degree of

Moisture effects on properties of wood-composite assemblies

Creator:: King, David
Abstract:: Engineered wood composites are used in many structural applications and are intended for dry use. However, these materials may encounter significant amounts of wetting while in service, which can lead to structural failures. This study combined aspects of wood science, mechanics, structural engineering, and mycology to assess changes in material...
Resource Type:: Masters Thesis
Full Text:: David King for the degree of Master of Science in Wood Science and Civil Engineering presented on March

Steel confined yielding damper for earthquake resistant design

Creator:: Newell, James D.
Abstract:: An experimental study of a passive energy dissipation tension-compression yielding brace or buckling restrained brace has been conducted. The Confined Yielding Damper (CYD) consists of a steel yielding core confined within a tube filled with non-cohesive media. The external tube and confined non-cohesive media provide lateral stability to the core...
Resource Type:: Masters Thesis
Full Text:: for Earthguake Resistant Design Abstract Approved: Christ'pher C. Higgins An experimental study of

Evaluation of Oregon Tack Coat Performance to Reduce Tracking and Increase Interlayer Shear Strength of Asphalt Pavements

Creator:: Covey, David J.
Abstract:: CSS-1H is the most commonly used slow-setting emulsion grade in Oregon. “New” engineered emulsions were recently developed in Oregon to reduce tracking, the pick-up of tack coats by construction vehicle tires during construction activities, and increase interlayer shear strength (ISS), the amount of adhesive bond present between layers of asphalt...
Resource Type:: Masters Thesis
Full Text:: David J. Covey for the degree of Master of Science in Civil Engineering presented on August 3, 2016

Numerical simulation of sedimentation and circulation in rectangular marina basins

Creator:: Askren, David, 1947-
Resource Type:: Masters Thesis
Full Text:: Rectangular Marina Basins AN ABSTRACT OF THE THESIS OF David Robert Askren for the degree Master of Ocean

Demonstration of a permeable barrier technology for the in-situ bioremediation of pentachlorophenol contaminated groundwater

Creator:: Cole, Jason David
Abstract:: A pilot scale demonstration of a biological permeable barrier was conducted in a pentachlorophenol-contaminated aquifer at a wood preserving facility. A permeable reactor was constructed to fit within a large diameter well. Arranged in series, a cylindrical reactor 24" x 36" (0.61 x 0.91m) (diameter x height) was partitioned to...
Resource Type:: Dissertation
Full Text:: Jason David Cole for the degree of Doctor of Philosophy in Civil Engineering presented on May 5,2000

Groundwater flow model for the lower Malheur Basin near Ontario, Oregon

Creator:: Walker, David S.
Abstract:: The shallow, poorly-confined, sand and gravel aquifer underlying the lower Malheur River basin is contaminated by nitrate and metabolites of the herbicide dimethyl tetrachloroterephthalate (DCPA), first detected in 1983 and 1985, respectively. The aquifer supplies water for the Ontario municipal water system, domestic and industrial uses, and irrigation. In response...
Resource Type:: Masters Thesis
Full Text:: Ontario, Oregon AN ABSTRACT OF THE THESIS OF David S. Walker for the degree of Master of Science in

Effect of an Idealized Mangrove Forest of Moderate Cross-shore Width on Loads Measured on a Sheltered Structure and Comparison with Predicted Forces

Creator:: Mitchell, William T.
Abstract:: As coastal communities face increasing chronic and acute hazards, nature-based coastal engineering solutions have experienced a rapid growth in popularity and interest. Recent works on this topic have shown that “Green Infrastructure” may be effective at mitigating coastal hazards and therefore provide sustainable adaptation alternatives to traditional engineering solutions such...
Resource Type:: Masters Thesis
Full Text:: .  David Burnell for serving as my Graduate School Representative at the last minute, assistance in the

Hydrodynamic loads on fiber-optic micro cables

Creator:: Evans, Matthew R.
Abstract:: A Finite Element Model of a deployed Fiber-Optic Micro Cable (FOMC) was performed using the marine cable modeling software, OrcaFlex. The focus of this study was a parametric analysis of a two-part, towed cable array with the FOMC dragged behind a depressor and connected to a drogue chute. Length-to-diameter ratios...
Resource Type:: Capstone Project
Full Text:: Title: Hydrodynamic Loads on Fiber-Optic Micro Cables Abstract Approved: Solomon C. Yim

Effect of deposits in Columbia Slough on algae growth in Smith and Bybee lakes

Creator:: Sobolewski, William Joseph
Abstract:: Currently, the Port of Portland is developing a 9, 410 acre area at the confluence of the Columbia and Willamette Rivers in Multnomah County, Oregon. This area will be developed for industrial, commercial, and recreational use. The recreational development in the North Portland Peninsula area, including the Rivergate Industrial District,...
Resource Type:: Masters Thesis
Full Text:: student) (Degree) in SANITARY ENGINEERING presented on .- k C (Major) (Date) Title: EFFECT OF DEPOSITS

On the Imaging of Rip Currents in X-band Radar

Creator:: Kloster, Rebecca
Abstract:: Rip currents pose a serious danger to visitors of bathing beaches; they are also an important process in surf zone circulation. Haller et al. [2014] demonstrated that shore-based X-band radar can be used to compliment in situ measurements of rip currents. However, little is known of the underlying radar imaging...
Resource Type:: Masters Thesis
Full Text:: Abstract approved: Merrick C. Haller Rip currents pose a serious danger to visitors of bathing beaches

Nutrients in runoff from spray irrigation of swine wastes

Creator:: Taylor, Dennis William
Abstract:: Major emphasis of this research study involved the evaluation of nutrient transport by overland flow. Samples gathered at various distances relative to a swine-waste spray irrigation system were used for the nutrient evaluation. As a result of this study, the following conclusions are made: 1. It is improbable that the...
Resource Type:: Masters Thesis
Full Text:: . Thanks are also due professor David C. England and. Mr. Roy Fancher of the Animal Science Department for

Remote Sensing of Nearshore Hydrodynamic and Morphodynamic Processes

Creator:: O'Dea, Annika M.
Abstract:: The use of remote sensing techniques in coastal science and engineering has rapidly increased in the past few decades. This dissertation outlines new remote sensing tools using two remote sensing technologies (lidar and X-band marine radar) along with two nearshore hydrodynamic and morphodynamic analyses supported or motivated by these remote...
Resource Type:: Dissertation
Full Text:: of Nearshore Hydrodynamic and Morphodynamic Processes Abstract approved: Merrick C. Haller The use

A numerical wave tank based on coupled potential flow-viscous flow model

Creator:: Zhang, Yi
Abstract:: In this study, a coupled potential flow-viscous flow model is used for numerical wave tank simulation. The solver satisfies all the requirements for such a simulation environment. The coupling scheme is based on a non-overlapping heterogeneous domain decomposition method. In this method, the flow domain consists of two subdomains. In...
Resource Type:: Dissertation
Full Text:: Tank Based on Coupled Potential Flow–Viscous Flow Model Abstract approved: Solomon C. Yim In this

An investigation of Oregon weight-in-motion data for bridge rating implementation and evaluation

Creator:: Pelphrey, Jordan Michael
Abstract:: The LRFR Manual, within commentary Article C6.4.4.2.3, contains provisions for development of site-specific live load factors. In Oregon, truck Weigh-in-Motion (WIM) data were used to develop live load factors for use on state-owned bridges. The factors were calibrated using the same statistical methods that were used in the original development...
Resource Type:: Masters Thesis
Full Text:: Oregon Weigh-In-Motion Data for Bridge Rating Implementation and Evaluation. Abstract approved: C

Ensemble-based data assimilation and depth inversion on the Kootenai River, ID, USA

Creator:: Landon, Kyle C.
Abstract:: Velocity measurements from drifter GPS records are assimilated and used in an ensemble-based inversion technique to extract the river bathymetry. The method is tested on a deep meandering reach and a shallow braided reach of the Kootenai River in Idaho, USA. The Regional Ocean Modeling System (ROMS) is used to...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Kyle C. Landon for the degree

Analysis of waves in the near-field of wave energy converter arrays through image processing

Creator:: Black, Colleen
Abstract:: Oregon State University conducted a series of laboratory experiments to measure and quantify the near-field wave effects caused within arrays of Wave Energy Converters (WEC). As the waves and WECs interact, the WECs generate radiated waves; these effects vary with the location within the array. Analyzing the near-field waves will...
Resource Type:: Masters Thesis
Full Text:: Abstract approved: ______________________________________________________ Merrick C. Haller

Synergistic Effects of Alkali Silica Reaction (ASR) and Fly Ash on the Corrosion Characteristics of Reinforced Concrete Systems

Creator:: Mazarei, Vandad
Abstract:: Alkali silica reaction (ASR) and corrosion of reinforcement are two deterioration mechanisms in reinforced concrete (RC) structures. These deterioration mechanisms can significantly damage a RC structure and reduce its service life. Supplementary cementitious materials (SCMs) are commonly used to improve the durability of RC systems containing reactive aggregate that are...
Resource Type:: Masters Thesis
Full Text:: approved: David Trejo Alkali silica reaction (ASR) and corrosion of reinforcement are two deterioration

Development of a Reliability-Based Framework and Empirical Models for Justifying Allowable Chloride Limits and Quantifying Critical Input Variables for Predicting the Service Life of Reinforced Concrete Structures

Creator:: Shakouri Hassanabadi, Mahmoud
Abstract:: Significant progress has been made over the past 20 years in developing models to estimate the service-life of reinforced concrete systems. The basic understandings of the mechanisms that control the transport of ions and moisture in concrete systems have been well researched and models for determining corrosion initiation, specifically chloride-induced...
Resource Type:: Dissertation
Full Text:: : ________________________________________________ David Trejo Significant progress has been made over the past 20 years in developing

Chemical transformation of rice husk ash for sustainable, constructable, and durable binary cementitious system

Creator:: Prasittisopin, Lapyote
Abstract:: The production of cement and concrete results in the production of large amounts of CO₂ emissions which can have significant negative environmental impacts. Using supplementary cementing materials (SCMs) as a cement replacement is an effective solution to reduce these negative environmental impacts, as most SCMs are waste by-products from other...
Resource Type:: Dissertation
Full Text:: : ________________________________________________________________________ David Trejo The production of cement and concrete results in the production of large amounts

Influence of Concrete and Construction Parameters on Chloride Test Measurements and Critical Chloride Threshold Limits

Creator:: Vaddey, Naga Pavan
Abstract:: The issue of chloride-induced corrosion of reinforcing steel in concrete and its economic impacts are well-known. Chlorides that cause reinforcement corrosion can be from constituent materials used to prepare concrete or can enter the hardened concrete when the structure is exposed to chloride environments. To minimize the risk of reinforcement...
Resource Type:: Dissertation
Full Text:: : ________________________________________________ David Trejo The issue of chloride-induced corrosion of reinforcing steel in concrete and its

Evaluation of desktop learning modules in civil engineering classrooms to promote inductive and interactive learning

Creator:: Buker, Kamilah E.
Abstract:: Students in undergraduate engineering programs typically do not synthesize content learned from disparate course work until the end of their final terms of college. As an example, in undergraduate civil engineering programs, transportation engineering concepts (e.g., geometric alignment, asphalt design procedures) and geotechnical engineering concepts (e.g., shear strength of soils,...
Resource Type:: Masters Thesis
Full Text:: : ___________________________________________________ David S. Hurwitz Students in undergraduate engineering programs typically do not

Critical Assessment of Chloride States and Quantities in Ordinary Portland and Specialty Cements

Creator:: Ahmed, Ahmed Abdulhaq
Abstract:: The constituent materials of concrete often contain chlorides. The presence of chlorides in sufficient amounts can disrupt the passive layer, also known as the passive film, that protects the reinforcing steel in concrete. This disruption can lead to premature corrosion of the reinforcing steel in concrete. To minimize the risk...
Resource Type:: Dissertation
Full Text:: Cements Abstract approved: ________________________________________________ David Trejo

Pedestrian safety at signalized intersections operating the flashing yellow arrow

Creator:: Tuss, Halston
Abstract:: At signalized intersections, pedestrians are considered to be amongst the most vulnerable. When in the crosswalk at intersections without protected left-turn phasing, pedestrians are particularly at risk from left-turning vehicles. Until recently, a wide variety of indications were in use across the US to indicate a permissive left-turn condition to...
Resource Type:: Masters Thesis
Full Text:: : ______________________________________________________ David S. Hurwitz At signalized intersections, pedestrians are considered to be amongst

Assessing the Trade-Off Between Sustainability and Resiliency of Reinforced Concrete Alternatives in Corrosive Conditions: An LCA-System Dynamics Approach

Creator:: Moreno Rangel, Erick D.
Abstract:: Concrete has been categorized as a key contributor of CO2 (carbon) emissions into the atmosphere. This is mostly associated with the production of ordinary portland cement (OPC). The concrete and cement industries are pursuing a path to reduce their carbon emissions generally in accordance with the climate change goals outlined...
Resource Type:: Masters Thesis
Full Text:: : ______________________________________________________ David Trejo Concrete has been categorized as a key contributor of

Development of a new mixture proportioning method and assessing the influence of material characteristics on flowing concrete mixtures

Creator:: Hendrix, Greg
Abstract:: Cast-in-drilled-hole (CIDH) piles are often constructed to depths that are inaccessible to internal vibration of the concrete. Internal vibration is necessary to consolidate the concrete and, if not performed, then typically inspection pipes are necessary to detect the presence of voids in CIDH piles. Void detection is critical to assessing...
Resource Type:: Masters Thesis
Full Text:: Flowing Concrete Mixtures Abstract approved: David Trejo Cast-in-drilled-hole (CIDH) piles

The Effects of Construction Practices on Concrete Construction Joint Performance

Creator:: Panduranga Setty, Shreyas
Abstract:: Concrete is the most widely used construction material in the world. When constructing large concrete structures, concrete may have to be placed in multiple lifts. In these cases, fresh concrete is placed on hardened concrete. The interface that is formed between these two lifts of concrete is known as a...
Resource Type:: Masters Thesis
Full Text:: Performance Abstract approved: ______________________________________________________ David Trejo

Implications of distracted driving on driver behavior in the standing queue of dual left-turn lanes : an empirical study

Creator:: Marnell, Patrick Stanley
Abstract:: Driver distraction is a commonly observable phenomenon with a significant effect on the transportation network. Although the negative effects of driver distraction on safety are commonly studied, there has been little effort made to investigate the impacts of distraction on efficiency. This study will examine driver behavior in standing queues...
Resource Type:: Masters Thesis
Full Text:: : ______________________________________________________ David S. Hurwitz Driver distraction is a commonly observable phenomenon with a significant

Influence of transport parameters on the fresh and hardened characteristics of ready-mixed concrete

Creator:: Chen, Jiaming
Abstract:: Most specifications for ready-mix concrete (RMC) limit mixing time to 90 minutes and/or truck drum revolution counts (DRC) to 300 before discharge. These specifications have been in place for many years with the objective of ensuring the quality and performance of the finished concrete product. However, limited research has been...
Resource Type:: Masters Thesis
Full Text:: : David Trejo Most specifications for ready-mix concrete (RMC) limit mixing time to 90 minutes and/or

Evaluation of a Pedestrian Call Extension and Cancelation System at a Midblock Trail Crossing

Creator:: Milacek, McKenna
Abstract:: Signalized intersections often provide pushbuttons to call for pedestrian service to minimize conflicting movements between road users. Signalized midblock crossings typically increase safety for pedestrians in locations with high traffic volumes and multiple lanes in each direction. However, unnecessary vehicular delay occurs from “ghost” pedestrian intervals when someone activates the...
Resource Type:: Masters Thesis
Full Text:: David Hurwitz Signalized intersections often provide pushbuttons to call for pedestrian service

Use of Flashing Lights in Traffic Safety of Vulnerable Road Users

Creator:: Ahmed, Ananna
Abstract:: Vulnerable road users, anyone interacting with the roadway facility without the protection of an automobile, experience greater risk for more severe crash outcomes. Multimodal roadway facilities often times provide less separation and more points of conflict between different types of road users. To promote vulnerable road user safety, transportation agencies...
Resource Type:: Dissertation
Full Text:: : ______________________________________________________ David Hurwitz Vulnerable road users, anyone interacting with the roadway facility

Pedestrian distraction : pedestrian behaviors at midblock crossings considering geometric and environmental conditions

Creator:: Kautz, Julia Anne
Abstract:: Pedestrian distraction at roadway crossings has been correlated with a higher risk of pedestrian-vehicle collisions due to the pedestrian's cognitive, visual, and motor attention being drawn to a wide variety of secondary tasks. This study is different from previous field studies of pedestrian midblock crossings in that the geometric layout...
Resource Type:: Masters Thesis
Full Text:: : ______________________________________________________ David S. Hurwitz Pedestrian distraction at roadway crossings has been correlated with a

Driving simulation : a mechanism for understanding driver response to mobile barriers in work zones

Creator:: Swake, Joshua
Abstract:: Highway construction projects require temporary changes in roadway characteristics, such as the number of operational lanes, lane path, lane width, shoulder width, and posted speed limit. These modifications which are often temporary in nature have the potential to impact driving performance. Many research efforts have focused on developing standards to...
Resource Type:: Masters Thesis
Full Text:: : ______________________________________________________ David S. Hurwitz Highway construction projects require temporary changes in roadway

Incipient motion and particle transport in gravel-bed streams

Creator:: Matin, Habib
Abstract:: The incipient motion of sediment particles in gravel-bed rivers is a very important process. It represents the difference between bed stability and bed mobility. A field study was conducted in Oak Creek, Oregon to investigate incipient motion of individual particles in gravel-bed streams. Investigation was also made of the incipient...
Resource Type:: Dissertation
Full Text:: Streams Abstract Approved: Peter C. Klingeman The incipient motion of sediment particles in gravel-bed

Influence of Uncertainties in Terrestrial Laser Scanning on Structural Reliability and Bridge Load Rating

Creator:: Loving, Carly K.
Abstract:: To ensure the safety of the nation’s bridges, the National Bridge Inspection Standards (NBIS) require all bridges to undergo routine load rating analyses to assess their structural capacity. Accurate geometric information for each structure is necessary for load rating analyses. This information is typically ascertained from as-built plans. Still, when...
Resource Type:: Masters Thesis
Full Text:: to Leica Geosystems and David Evans and Associates for providing the hardware and software used for

Modeling sediment transport, channel morphology and gravel mining in river bends

Creator:: Nam, Ilgi
Abstract:: A technique is developed and tested to analyze the interaction of flowing water, bed topography, and bedload sediment transport in meandering channels where gravel bars are removed. The method relates the local velocity distribution, bed shear stress and sediment transport conditions to the local bed configuration in river bends before...
Resource Type:: Dissertation
Full Text:: Mining in River Bends . Abstract approved: Peter C. Klingeman A technique is developed and tested to

Local scour at isolated obstacles on river beds

Creator:: Huang, Cheng-Chang
Abstract:: Maximum equilibrium scour depths, equilibrium scour volumes, and induced equilibrium movements at isolated obstacles on river beds were investigated in clear-water scour. The research was achieved by a systematic flume study based on the results of dimensional analysis of local scour. The main tested obstacles for local scour were cubes....
Resource Type:: Dissertation
Full Text:: : Redacted for Privacy Peter C. KlingemaY Maximum equilibrium scour depths, equilibrium scour volumes, and

Nonlinear hydrodynamic response of curved singly-connected cables

Creator:: Chiou, Rueybin
Resource Type:: Dissertation
Full Text:: . Ronald B. Guenther, Dr. Timothy C. Kennedy and Dr. David R. Thomas for their participation as Graduate

Unobserved Heterogeneity and Spatial Correlation: Statistical and Econometric Analyses of Heavy-Vehicle Hard Braking and Crash Frequency by Crash Type

Creator:: Anderson, Jason C.
Abstract:: This dissertation provides a comparison of statistical and econometric frameworks, using a previously unused freight data source, to study crash frequency by crash type and heavy-vehicle hard braking in Oregon. Hard braking can serve as a proxy for several factors, one of which is safety. Therefore, with the hard braking...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE DISSERTATION OF Jason C. Anderson

Quantification of landslide movement in a forested environment

Creator:: Conner, Jeremy C.
Abstract:: Landslides are an insidious natural hazard, which can result in significant damage to public infrastructure. Limited monitoring tools are available, particularly tools suitable for use in forested environments. These tools often only allow a few locations across the slide to be monitored. Terrestrial Laser Scanning (TLS) shows promise as a...
Resource Type:: Masters Thesis

Improving Long-Term Interlayer Bond Performance by Developing Quality Control Technologies and Certification Procedures for Tack Coats

Creator:: Villarreal, Richard C., III
Abstract:: The tack coat bond is known to affect the longevity of asphalt pavements. Proper interlayer bonding prevents successive pavement layers from acting independently of one another and creating non-uniform stress and strain profiles in the pavement structure. Poor bonding between pavement layers can result in various pavement failures such as...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Richard C

Coupled dynamics of bouys and mooring tethers

Creator:: Idris, Krisnaldi
Abstract:: Time-domain models were developed to predict the response of a tethered buoy subject to hydrodynamic loadings. A coupled analysis of the interaction of a buoy and its mooring is included and three-dimensional response is assumed. External loadings include hydrodynamic forces, tethers tensions, wind loadings and the weight of both cable...
Resource Type:: Dissertation
Full Text:: the Naval Civil Engineering Laboratory, Contract Number N4708-90-C-1146, the Naval Facility

Storm runoff response from roadbuilding and logging on small watersheds in the Oregon Coast Range

Creator:: Hsieh, Frederic Shu-kong
Abstract:: The effects of roadbuilding, logging and burning upon stream runoff responses to individual storms are evaluated for the Alsea experimental watersheds, located in the Oregon Coast Range, The parameters analyzed are peak discharge, induced peak discharge, time-to-peak, and storm-runoff volume. The volume parameter is further sub-divided into total, quick, delayed,...
Resource Type:: Masters Thesis
Full Text:: for privacy Peter C. Kling an The effects of roadbuilding, logging and burning upon stream runoff

Mathematical model of a phytoplankton community in a nitrate limited environment

Creator:: Grenney, William J.
Abstract:: Mathematical modeling of phytoplankton populations based on laboratory observations provides increased understanding of the interaction among the environmental and biological mechanisms. influencing growth dynamics. Such fundamental understanding is necessary to estimate the impact of man-made perturbations on natural population. A three-compartment mathematical model was developed to represent a phytoplankton population...
Resource Type:: Dissertation
Full Text:: Abstract approved: 'David A. Bella Mathematical modeling of phytoplankton populations based on laboratory

Modeling estuary pollution by computer simulation

Creator:: Grenney, William J.
Abstract:: A digital computer model was developed to simulate the time and space distribution of a dissolved pollutant in an estuary. The program is basically a one-dimensional finite-difference model, but two dimensions can be represented by attaching together several one-dimensional channels. The influence of convection, dispersion and decay are included in...
Resource Type:: Masters Thesis
Full Text:: : MODELING ESTUARY POLLUTION BY COMPUTER SIMULATION Abstract approved: Dr. David A. Belia A digital

An evaluation of the cubic autotape under dynamic conditions

Creator:: Plasker, James Robert
Abstract:: Accuracy requirements for positioning a vessel in the near shore area have increased in recent years. To meet these requirements several electronic positioning systems have been developed. One such system is the Cubic Autotape Model DM-40. The Autotape is a circular positioning system which utilizes the phase comparison between transmitted...
Resource Type:: Masters Thesis
Full Text:: UNDER DYNAMIC CONDITIONS Abstract approved: Redacted for Privacy David F. Mez$a Accuracy

Sound and Vibration Analysis of Alternative Rumble Strips

Creator:: Horne, Dylan Ross
Abstract:: Roadway departure crashes accounted for 18,275 fatal crashes in 2017 across the United States (Jones et al. 2017). Rumble strips (RS) provide audible and haptic interior alert when a vehicle is departing the roadway reducing run-off-the road crashes. Although inexpensive to install, and easy to maintain, RS are not installed...
Resource Type:: Dissertation
Full Text:: : ______________________________________________________ David S. Hurwitz Roadway departure crashes accounted for 18,275 fatal crashes in 2017

A study on the oxidation of sulfides in estuarine waters

Creator:: Korpalski, Thomas Paul
Abstract:: Waters of various salinities were secured from the Umpqua estuary, the Umpqua River, and the open ocean near the mouth of the estuary. The rate of oxidation of sulfides in these various waters was investigated to assess the potential longevity of free sulfides in estuarine waters. The rate of disappearance...
Resource Type:: Masters Thesis
Full Text:: STUDY ON THE OXIDATION OF SULFIDES IN ESTUARINE WATERS Abstract approved: Dr. David A. Bella Waters

Analysis of dichotomous response models for low-dose carcinogenic risk estimation

Creator:: Tabesh, Taraneh
Abstract:: Several dichotomous-response models of carcinogenesis are discussed and their implications for low-dose risk estimation are examined. In addition, a pharmacokinetic model incorporating non-linear kinetics is studied and the results are investigated with respect to multiple-pollutant exposures. None of these models appears to suggest the existence of "thresholds". The analysis of...
Resource Type:: Masters Thesis
Full Text:: this point. I wish to express my thanks to Professor David Bella, my advi- sor, for his

Performance-based seismic design of light-frame shearwalls

Creator:: Kim, Jun Hee
Abstract:: Performance-based design has gained interest in recent years among structural designers and researchers. Performance-based design includes selection of appropriate building sites, structural systems and configurations, as well as analytical procedures used in the design process, to confirm that the structure has adequate strength, stiffness and energy dissipation capacity to respond...
Resource Type:: Dissertation
Full Text:: Seismic Design of Light-Frame Shearwalls Abstract approved: David V. Rosowsky Performance-based design

Evaluation of Dynamic Passive Pedestrian Detection with a Framework for Future Applications

Creator:: Larson, Travis O.
Abstract:: Intersections pose unique transportation challenges regarding safety and operational efficiency. When pedestrians currently want to cross at intersection, they need to use a push button to issue a call for service. The call is static and cannot be altered or changed. But by implementing dynamic passive pedestrian detection sensors, intersections...
Resource Type:: Masters Thesis
Full Text:: Abstract approved: _____________________________________________________________ David Hurwitz

Coupled wave and surge modeling of Tillamook Bay, Oregon : extreme events and climate change impacts

Creator:: Cheng, Tiffany Kay
Abstract:: Estuaries represent the confluence of land and ocean environments and encompass a number of complex interactions amongst tides, winds, offshore waves and the riverine contributions, all of which contribute to total water levels (TWLs). The study of TWLs and the relative weight of its components can assist local communities in...
Resource Type:: Masters Thesis
Full Text:: Impacts Abstract approved: ______________________________________________________ David F

Digitalization of Construction-Phase Information Management by Project Owners

Creator:: Jahanger, Qais K.
Abstract:: Construction is a strategically important industry and its productivity has a significant impact on a nation’s economy. However, productivity in the US construction industry has been widely reported to be on the decline. Among several causes identified, the lack of innovation in project management practices has been described as having...
Resource Type:: Dissertation
Full Text:: Abstract approved: ______________________________________________________ David Trejo

Tsunami propagation in large rivers : idealized cases and the Columbia River Estuary

Creator:: Kalmbacher, Kirk D.
Abstract:: The hazards associated with tsunamis are well known and have been studied for decades. The majority of research is, however, focused on open coastlines which bear the brunt of a tsunamis force. Other regions that can be strongly impacted by a tsunami are large estuaries. Here, the tsunami encounters a...
Resource Type:: Masters Thesis
Full Text:: : _______________________________________________________________ David F. Hill The hazards associated with tsunamis are well known and have been studied

Consideration of Driver Behavior in the Design of Red Light Extension Systems

Creator:: McCrea, Sarah Anne
Abstract:: Red Light Running (RLR) is a safety hazard at signalized intersections in Oregon and throughout the United States. Various methods of mitigating factors contributing to RLR have been implemented but few protect against a conflict when a vehicles runs a red light. Additionally, current prediction algorithms are complicated; there is...
Resource Type:: Masters Thesis
Full Text:: : _____________________________________________________ David S. Hurwitz Red Light Running (RLR) is a safety hazard at signalized

Right-hook crash causality at signalized intersections

Creator:: Jannat, Mafruhatul
Abstract:: A Right-hook (RH) crash is a common type of bicycle-motor vehicle crash that occurs between a right-turning vehicle and through-moving bicycle at an intersection. At signalized intersections, RH crashes can occur at the onset of the green or during the latter portion of the green phase. In spite of the...
Resource Type:: Dissertation
Full Text:: Intersections. Abstract approved: _____________________________________________________ David S. Hurwitz A

Evaluation of alternative information signs in Oregon

Creator:: Neill, Justin Michael
Abstract:: The number of international inbound tourists to the United States has risen steadily. To serve these and other tourists best, traffic signs need to communicate information correctly across a potential language barrier. Of particular interest is the traffic sign intended to communicate directions to Tourist Information centers. While the general...
Resource Type:: Masters Thesis
Full Text:: . Abstract approved: _____________________________________________________ David S. Hurwitz The

Integrating Driving Simulator Experiment Data with Multi-Agent Connected Automated Vehicle Simulation (Ma-Cavs) Platform to Quantify Improved Capacity

Creator:: Chand, Cadell Y.
Abstract:: Autonomous vehicles (AVs) at varying market penetrations will change traffic flow and highway performance. At AV market penetrations between 0% and 100%, human driven vehicles (HVs) will be interacting with AVs. However, little is known about how HVs interact with AVs. This study attempts to quantify HV headways when following...
Resource Type:: Masters Thesis
Full Text:: : ______________________________________________________ David S. Hurwitz Autonomous vehicles (AVs) at varying market penetrations will change

Load sharing and system factors for light-frame wall systems

Creator:: Yu, Guangren
Abstract:: A considerable amount of research has focused on load-sharing and system effects in repetitive-member wood floor systems subject to transverse loading. However, relatively few studies have been conducted to investigate load-sharing and system effects in repetitive-member wall systems which may be subject to combined transverse and gravity (vertical) loading, and...
Resource Type:: Dissertation
Full Text:: System Factors for Light-Frame Wall Systems. Abstract approved: David V. Rosowsky A considerable

Removing Residual Lane Markings to Reduce Driver Confusion

Creator:: Weber, Jane B.
Abstract:: When pavement markings on roadways are removed, scarring can occur leaving behind traces of where the marking used to be called ghost lines. These ghost lines can confuse drivers on the roadway and divert their attention from the correct lane markings leading them into the false lane. Previous research has...
Resource Type:: Masters Thesis
Full Text:: Abstract approved: ______________________________________________________ David S. Hurwitz When

Innovative Applications of Real-World Vehicle Trajectories Collected with a Radar Vehicle Detection System

Creator:: Simpson, Ellen J.
Abstract:: Left turn movements are considered to be the highest risk movements through an intersection, and can result in head on, angle, or side impact crashes. The flashing yellow arrow (FYA) for use as a permissive left turn phasing indication is relatively recent, first appearing in the 2009 edition Manual on...
Resource Type:: Masters Thesis
Full Text:: Abstract approved: _____________________________________________________ David S. Hurwitz Left turn

Evaluation of Driver Behavior during Right Turn Maneuvers at Signalized Intersections: Mitigation of Driver-Pedestrian Conflicts with a Right Turn Flashing Yellow Arrow

Creator:: Jashami, Hisham
Abstract:: Accommodating motor vehicles that are turning (left or right) at signalized intersections requires a careful understanding of the safety and efficiency of design and operational variables. Turning vehicles are the primary collision risk for non-motorized road users at signalized intersections. When turning movements need to be controlled, proper driver response...
Resource Type:: Dissertation
Full Text:: : ______________________________________________________ Dr. David S. Hurwitz Accommodating motor vehicles that are turning (left or right) at

Safety and efficiency benefits of traffic signal countdown timers : a driving simulator study

Creator:: Islam, Mohammad Rabiul
Abstract:: Traffic signal countdown timers (TSCT) are innovative, practical and cost effective technologies with the potential to improve efficiency and safety at signalized intersections. The purpose of these devices is to assist motorists in decision making at signalized intersections with real time signal change information. While successful implementation of these devices...
Resource Type:: Dissertation
Full Text:: : __________________________________________________ David S. Hurwitz Traffic signal countdown timers (TSCT) are innovative, practical and

Evaluation of Setback Crosswalk to Mitigate Vehicle-Pedestrian Conflicts at Intersections

Creator:: Chai, Eileen Pei Ying
Abstract:: It is considered best practice when designing pedestrian access at intersections to provide two curb ramps at each street corner. In Oregon, there are many locations where long ramp runs cause curb ramps to be set back a significant distance from the apex of the intersection corner to meet this...
Resource Type:: Masters Thesis
Full Text:: approved: ______________________________________________________ David S. Hurwitz It is considered

Influence of Bicyclist Presence on Driver Performance during Autonomous Vehilce Take-Over Requests

Creator:: Fleskes, Kayla
Abstract:: Autonomous vehicles (AVs) may have the potential to mitigate a significant proportion of serious crashes which are due to human error or poor decision making behind the wheel. However, there are still many concerns associated with SAE Level 3 AVs that require intervention by a human driver after a take-over...
Resource Type:: Masters Thesis
Full Text:: Requests Abstract approved: ______________________________________________________ David S

The effect of mixing on the oxygen uptake rate of estuarine bottom deposits

Creator:: Martin, Duane Collins
Abstract:: A study of the effect of mixing on the oxygen uptake rate of estuarine bottom deposits is presented. The method of study involved the mixing of samples of bottom deposits with the overlying water to result in concentrations of suspended matter in the same order as observed in the estuary....
Resource Type:: Masters Thesis
Full Text:: Traineeship Program, Trainee- ship Number EH-68-620-C (3), which enabled the writer to do gradu- ate study

Preliminary Assessment of Driver Parking Decisions From A Heavy Vehicle Driving Simulator To Inform Curb Management Decisions

Creator:: Liu, Yujun
Abstract:: As e-commerce and urban deliveries spike, there is an increasing demand for curbside loading/unloading space. However, commercial vehicle drivers face numerous challenges while navigating dense urban road networks. Previous literature on the topic of how commercial vehicle drivers make choices about when and where to park is scarce, and data...
Resource Type:: Masters Thesis
Full Text:: Decisions Abstract approved: ________________________________________________ David S

Evaluating Driver Response to the Onset of Circular Yellow Indication in the Presence of a Following Vehicle at Isolated High-Speed Signalized Intersections

Creator:: Mohammed, Hameed A.
Abstract:: Dilemma zones on the approach to high-speed signalized intersections have been identified as a safety problem that can contribute to rear–end and right–angle crashes. However, in situations when a pair of vehicles is caught in the dilemma zone, it is not well understood how the following vehicle’s headway and classification...
Resource Type:: Dissertation
Full Text:: : ______________________________________________________ David S. Hurwitz Dilemma zones on the approach to high-speed signalized intersections have

Visual Search Patterns and Behavior of Left Turning Bicyclists at Roadway Intersections: A Field Study

Creator:: Burns, Patrick O.
Abstract:: This research effort considers bicyclist’s left-turn behavior at roadway intersections with varying levels of traffic control; specifically, seeking to address the question where do bicyclists look to acquire information. A demographic comparison was made to determine if factors such as gender or experience influence the nature of how a bicyclist...
Resource Type:: Honors College Thesis
Full Text:: David S. Hurwitz This research effort considers bicyclist’s left-turn behavior at roadway

Implications of Red Signal Countdown Timers on Visual Attention of Oregon Drivers

Creator:: Wyman, Amy A.
Abstract:: Red Signal Countdown Timers (RSCTs) are devices placed at intersections to inform drivers of the time remaining on a red indication before it turns green, typically to improve intersection efficiency. This study examines the visual attention of Oregon drivers to circular red (CR) indications with RSCTs as compared to standard...
Resource Type:: Honors College Thesis
Full Text:: : ______________________________________________________ David S. Hurwitz Red Signal Countdown Timers (RSCTs) are devices placed at

The Evaluation of Engineering Treatments for Right-Hook Crashes at Signalized Intersections with Bicycle Traffic

Creator:: Warner, Jennifer Lynn
Abstract:: A right-hook crash is a bicycle-motor vehicle crash between a right-turning motor vehicle and an adjacent through-moving bicycle. This study focuses on right-hook crashes that occur during the latter stage of the circular green indication at signalized intersections with shared right-turn and through lanes. The overall objective was to evaluate...
Resource Type:: Masters Thesis
Full Text:: : _____________________________________________________ David S. Hurwitz A right-hook crash is a bicycle-motor vehicle crash between a right

Tidal range changes in the Delaware Bay : past conditions and future scenarios

Creator:: Hall, George F.
Abstract:: Throughout the Holocene, appreciable changes in bathymetry are hypothesized to have resulted in large changes to tidal datums in coastal and estuarine areas. An understanding of tidal change is an important contribution to the knowledge of relative historical sea-level change and future coastal planning. To test this hypothesis, the Advanced...
Resource Type:: Masters Thesis
Full Text:: : ______________________________________________________________________ David F. Hill Throughout the Holocene, appreciable changes in bathymetry are hypothesized

An evaluation of gap acceptance behavior at unsignalized intersections

Creator:: Nabaee, Sahar
Abstract:: Gap acceptance behavior is critical to the safety and operational performance of unsignalized intersections. The complex nature of the human behavior and its dependence on various socioeconomic and environmental parameters makes it challenging for transportation professionals to assess the performance of such intersections. To investigate the behavioral patterns of drivers...
Resource Type:: Masters Thesis
Full Text:: Abstract approved: _____________________________________________ David S. Hurwitz Gap acceptance

A safety evaluation of turn lane-adjacent bike lane configurations in Portland, Oregon

Creator:: Wyman, Amy
Abstract:: The Manual on Uniform Traffic Control Devices prohibits positioning a bike lane right-adjacent to a vehicle turn-only lane to mitigate the potential for right-hook crashes. However, it provides no specific guidance on positioning with respect to bus-only lanes. This thesis describes a before/after safety evaluation of bike lanes positioned left...
Resource Type:: Masters Thesis
Full Text:: . Abstract approved: ______________________________________________________ David Hurwitz The

Influence of Texting on Driver Glance Patterns and Vehicular Lane Position on Horizontal Curves

Creator:: Ellett, Makenzie A.
Abstract:: The use of in-vehicle technologies, such as mobile phones, while driving has proliferated in recent years. Most notably, drivers are using mobile phones to send and receive text messages while operating a vehicle with increasing frequency. The act of texting while driving poses a significant threat not only to the...
Resource Type:: Honors College Thesis
Full Text:: Patterns and Vehicular Lane Position on Horizontal Curves Abstract Approved: David S

Simulation of coastal processes in a circular wave basin

Creator:: Katzev, David H.
Abstract:: The circular wave basin provides a means of physically modeling the nearshore without the typical problems associated with end walls. Three different coastal processes were examined to demonstrate the use of a spiral wavemaker in a circular wave basin. These were longshore currents, shear waves, and groin circulation. A beach...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF David H. Katzev for the degree of Master of Science in Civil

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