Open Access. Powered by Scholars. Published by Universities.®
- Discipline
Articles 1 - 9 of 9
Full-Text Articles in Entire DC Network
Full Bridge Modeling To Evaluate Effectiveness Of A Seismic Bearing On A Newly Constructed Bridge On I-55, Sandip Gupta
Full Bridge Modeling To Evaluate Effectiveness Of A Seismic Bearing On A Newly Constructed Bridge On I-55, Sandip Gupta
Electronic Theses and Dissertations
Infrastructure constructed should be safe and reliable. Bridges are essential infra structure used by large mass of people on a daily basis. Out of 617,000 bridges across the United States, 42% are at least 50 years old, and 7.5% are considered structurally deficient as per Infrastructure report card. 178 million trips are made on these structurally deficient bridges every day in the US. Thus, a bridge should be designed, not only for Strength and Service limit states, but also for Extreme limit states which includes earthquake. New Madrid Seismic Zone (NMSZ), located in southeastern Missouri, northeastern Arkansas, western Tennessee, western …
Development And Evaluation Of Performance Models For Asphalt, Concrete, And Composite Pavements Using Machine Learning, Rulian Ferreira De Almeida Barros
Development And Evaluation Of Performance Models For Asphalt, Concrete, And Composite Pavements Using Machine Learning, Rulian Ferreira De Almeida Barros
Electronic Theses and Dissertations
Transportation infrastructures account for a considerable portion of public investments, which serve as the backbone of a country’s economy by providing essential services to businesses and people. In the United States, public investments in transportation infrastructure assets represent trillions of dollars. The U.S road network consists of about 4 million miles, being the world’s largest, longest, and biggest transportation system. Paved roads account for 2.6 million miles, and 93% of them are surfaced with asphalt. However, a portion of the paved roads consists of asphalt overlaid concrete pavements, also known as composite pavements. When concrete pavements start to fail, they …
Computational Modeling And Simulations Of Condition Deterioration To Enhance Asphalt Highway Pavement Design And Asset Management, Zul Fahmi Bin Mohamed Jaafar
Computational Modeling And Simulations Of Condition Deterioration To Enhance Asphalt Highway Pavement Design And Asset Management, Zul Fahmi Bin Mohamed Jaafar
Electronic Theses and Dissertations
A nation’s economy and prosperity depend on an efficient and safe transportation network for public mobility and freight transportation. A country’s road network is recognized as one of the largest public infrastructure assets. About 93 percent of 2.6 million miles of paved roads and highways in the United States (U.S.) are surfaced with asphalt. Longitudinal roughness, pavement cracking, potholes, and rutting are the major reasons for rehabilitation of asphalt roads. Billions of dollars are required annually for the maintenance and rehabilitation of road networks. If timely maintenance and rehabilitation are not performed, the pavement damages inflicted by heavy traffic repetitions …
A Descriptive Analysis Of Rehearsal Techniques Of Expert Middle School Band Directors From Kentucky, Mississippi, And Tennessee, David John Culp Jr
A Descriptive Analysis Of Rehearsal Techniques Of Expert Middle School Band Directors From Kentucky, Mississippi, And Tennessee, David John Culp Jr
Electronic Theses and Dissertations
The purpose of the present study was to identify rehearsal techniques among expert middle school band directors Kentucky, Tennessee, and Mississippi. Twenty-one potential participants were recommended by university faculty and other leaders within the profession. Seven directors were identified who met criteria for participation in the study. Six directors agreed to participate, but due to scheduling conflicts, five were observed. Participants were observed and video recorded for three consecutive rehearsals. Initial analysis divided rehearsals into subsections including: warm-up, repertoire rehearsal, run-through performance, and non-instructional time. Repertoire rehearsal time for all participants was then systematically analyzed using rehearsal frames with two …
A Framework For Assessing Water Quality, Prioritizing Recovery Potential, And Analyzing Placement Of Best Management Practices, Tadesse Animaw Sinshaw
A Framework For Assessing Water Quality, Prioritizing Recovery Potential, And Analyzing Placement Of Best Management Practices, Tadesse Animaw Sinshaw
Electronic Theses and Dissertations
Motivated by the U.S. EPA goals, this research developed a framework to support identification and restoration of nutrient-impaired water bodies. The study objectives were developing total nitrogen (TN) and total phosphorus (TP) prediction models, evaluating the impact of social indicators on assessing recovery potential, and developing a spatial decision support system for choice and placement of best management practices (BMPS). An artificial neural network was used to develop TN and TP predictive regional models for U.S. lakes using easily measurable and cost-effective variables. The performance of models was superior for regions trained with larger datasets and/or regions with lower temperature …
The Effect Of A Researcher Composed Mouthpiece Buzzing Routine On The Intonation And Tone Quality Of Beginning Band Brass Students, Jason William Beghtol
The Effect Of A Researcher Composed Mouthpiece Buzzing Routine On The Intonation And Tone Quality Of Beginning Band Brass Students, Jason William Beghtol
Electronic Theses and Dissertations
The present study is an investigation of the effect of an author composed mouthpiece buzzing routine modeled by the teacher on beginning band brass students’ intonation and tone quality. The subjects (N = 43) were sixth grade beginning band brass students from a large band program in the northeast region of Mississippi. The experimental group (n = 27) buzzed a daily routine modeled by their instructor at the beginning of each class period. The control group (n = 16) received no treatment and proceeded through normal classroom activities. The duration of the instructional period was ten weeks. This study utilized …
Computation Aided Design Of Multicomponent Refractory Alloys With A Focus On Mechanical Properties, Paul Daniel Clark
Computation Aided Design Of Multicomponent Refractory Alloys With A Focus On Mechanical Properties, Paul Daniel Clark
Electronic Theses and Dissertations
Quantum mechanical calculations paired with exponential growth in computer processing speed has created a paradigm shift in materials discovery. Simulations can be carried out to accurately predict structure-composition-property relationships of novel systems. This work focuses on calculating elastic properties of high entropy alloys, a new class of alloys that are built from 4+ elements in equi-atomic proportion. These alloys often exhibit simple microstructures and each constituent element contributes its properties to the overall bulk properties of the amalgamated material. This "cocktail" effect has led to the discovery of many alloys which could drive technical advances in the future. Elastic properties …
Atmospheric Mercury Species In Northern Mississippi: Concentrations, Sources, Temporal Patterns, And Soil-Air Exchange, Yi Jiang
Electronic Theses and Dissertations
Mercury is a highly toxic element that is found both naturally and as an introduced contaminant in the environment. The majority of Mercury released to the environment is into the atmosphere, where because of its high volatility and long residence time is dispersed globally. In order to better understand the factors controlling the distribution and temporal patterns of atmospheric Mercury species, as well as the sources of airborne Mercury in the mid-south region, concentrations of gaseous elemental mercury (gem), gaseous oxidized mercury (gom), and particulate-bound mercury (pbm), along with meteorological parameters and other ancillary data, were collected for more than …
Finite Element Modeling Of Seismic Wave Propagation In Earthen Embankments, Binyam Tadese
Finite Element Modeling Of Seismic Wave Propagation In Earthen Embankments, Binyam Tadese
Electronic Theses and Dissertations
The detection of internal seepage zones in embankments (dams and levees) by geophysical seismic techniques such as seismic refraction is limited by a number of factors. Some factors are associated with inversion and smoothing problems during processing, while others are associated with the natural characteristics of embankments and seepage anomalies. In this research, changes in the seismic response associated with: embankment soil compositions and moisture, characteristics of the seepage zone, presence of water in the reservoir, and shape of embankment was studied via 2D and 3D finite element (FE) embankment models. Artificial reflections from external boundaries and numerical dispersion were …