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Articles 1 - 11 of 11
Full-Text Articles in Engineering
Development Of A System For Assessing And Minimizing Health Risk During Wastewater Conveyance And Treatment Processes, Mariana Pitiriciu
Development Of A System For Assessing And Minimizing Health Risk During Wastewater Conveyance And Treatment Processes, Mariana Pitiriciu
FIU Electronic Theses and Dissertations
Many studies on volatile organic compound (VOC) emissions have focused on treatment plants sewage at various locations throughout the world, but they seldom report VOC emissions derived from sewer networks and sewer transportation systems, as compared to wastewater treatment plants. This study focuses on understanding the occurrence of VOCs produced from sewer networks in municipalities or counties throughout the State of Florida (United States) and identifying potential health risks to sewer workers. Common VOCs were identified in wastewater treatment plant influents using available analytical reports. Gas-phase samples from sewer manholes in the City of Hallandale Beach were collected and analyzed …
Freeway Performance Measurement In A Connected Vehicle Environment Utilizing Traffic Disturbance Metrics, Leila Azizi
Freeway Performance Measurement In A Connected Vehicle Environment Utilizing Traffic Disturbance Metrics, Leila Azizi
FIU Electronic Theses and Dissertations
The introduction of connected vehicles, connected and automated vehicles, and advanced infrastructure sensors will allow the collection of microscopic measures that can be used in combination with macroscopic measures for better estimation of traffic safety and mobility. This dissertation examines the use of microscopic measures in combination with the usually used macroscopic measures for traffic congestion evaluation, traffic state categorization, traffic flow breakdown prediction, and estimation of traffic safety. The considered macroscopic measures are the mean speed, traffic flow rate, and occupancy. The investigated microscopic measures for the stated purpose are: standard deviations of individual vehicle’s speeds, standard deviation of …
Development Of Local And Global Corrosion Sensing Technique To Monitor Structural Behavior Of Prestressed Concrete Structures, Dewan Z. Hossain
Development Of Local And Global Corrosion Sensing Technique To Monitor Structural Behavior Of Prestressed Concrete Structures, Dewan Z. Hossain
FIU Electronic Theses and Dissertations
Corrosion of steel rebar in reinforced concrete structures is a concern for highway bridge owners. According to 2002 study by the Federal Highway Administration, ~15% of the highway bridges in the US are structurally deficient due to corrosion and have an estimated annual direct cost of $8.3 billion. Generally, in post-tensioned bridges, ducts filled with poor or incomplete grouting can allow the tendons to come into contact with water, leading to corrosion and fracture. Although new and improved procedures of grouting have been developed to reduce the instances of poor grouting, the problem of how to reliably inspect tendons on …
Corrosion Durability Of A Nano-Particle Enriched Zinc-Rich Coating System For Highway Steel Bridges, Saiada Fuadi Fancy
Corrosion Durability Of A Nano-Particle Enriched Zinc-Rich Coating System For Highway Steel Bridges, Saiada Fuadi Fancy
FIU Electronic Theses and Dissertations
Corrosion is a major concern for the long-term durability and structural integrity of steel components of highway bridges when unprotected. The application of protective coatings has been widely used for corrosion mitigation of atmospherically exposed structural steel. At present, the zinc-rich primer (ZRP) based three-coat system is widely used in the United States. The metallic zinc pigment ideally would provide corrosion resistance by sacrificial as well as barrier protection. The life of these coating systems is at best only half of the bridge design life. Furthermore, premature degradation may occur if there are flaws in the system due to improper …
Decoding Geometric Origin Of Geomechanical Properties, Sumana Bhattacharya
Decoding Geometric Origin Of Geomechanical Properties, Sumana Bhattacharya
FIU Electronic Theses and Dissertations
Granular materials such as soil and aggregate, are ubiquitous in nature and the understanding of their mechanical behavior is of great importance to better predict and design the civil infrastructure. The particle geometry is a key information to robustly establish the link between the underlying grain-scale mechanisms and the macroscopic behavior of granular materials. However, the characteristics of the particle geometry remain to be better understood. For example, we do not know how the volume is related to the surface area for irregularly shaped particles in general. Their relation clearly depends on the morphology, dictating that volume, surface area, and …
Reduction Of Pertechnetate From Off-Gas Condensate Using Aged Zero-Valent Iron As A Reducing Agent, Abraham T. Gebru
Reduction Of Pertechnetate From Off-Gas Condensate Using Aged Zero-Valent Iron As A Reducing Agent, Abraham T. Gebru
FIU Electronic Theses and Dissertations
The Hanford site located in Washington State was one of the major nuclear processing facilities in the U.S. where plutonium was produced between the 1940s and the 1980’s. As a result of this forty yearlong production, approximately 53 million gallons of radioactive waste was generated and currently stored in 177 single and double shelled underground tanks. There were around 60 major and minor leaking incidents in the tanks through the years. These leaking incidents were wakeup calls to a search for an effective long term disposal solution. This paper will concentrate on the low activity waste (LAW), specifically the radioactive …
Abc Closure Joints: Detailing, Design And Service Life, Azadeh Jaberi Jahromi
Abc Closure Joints: Detailing, Design And Service Life, Azadeh Jaberi Jahromi
FIU Electronic Theses and Dissertations
Accelerated Bridge Construction (ABC) is a paradigm change in delivering bridges, which significantly minimizes onsite construction, enhances the safety of the public and construction workers, and uses innovative materials and technologies that can increase the service life of bridges. The most widely used ABC technique utilizes prefabricated modular bridge deck elements; however, there are concerns regarding the structural performance and durability of cast-in-place joints between these elements. Because of the limited experimental data on closure joints, there is a lack of information helpful for detailing, design and service life of these joints. To address these concerns, research was conducted to …
Retrofitting Of Bridge Elements Subjected To Predominantly Axial Load Using Uhpc Shell, Mahsa Farzad
Retrofitting Of Bridge Elements Subjected To Predominantly Axial Load Using Uhpc Shell, Mahsa Farzad
FIU Electronic Theses and Dissertations
In the United States, ~30% of the ~600,000 highway bridges are categorized as structurally deficient or functionally obsolete. These bridges should be replaced or upgraded to sustain the transportation needs of the growing public and private sectors of the U.S. economy. It is not uncommon for structures to have advanced levels of corrosion-induced damage where major repair and maintenance works are required. However, the transportation infrastructure may undergo disruption during rehabilitation causing interruption to critical economic public, civil and commercial activities. This mandates the development of new techniques and materials for accelerated rehabilitation and resilience. To address this issue, a …
Construction Workers' Health And Safety During Post Disaster Reconstruction Phase: A Case Study In Nepal, S M Jamil Uddin
Construction Workers' Health And Safety During Post Disaster Reconstruction Phase: A Case Study In Nepal, S M Jamil Uddin
FIU Electronic Theses and Dissertations
The understanding of the concept of construction workers’ health and safety during the post-disaster reconstruction (PDR) phase is still unexplored. The objective of this study is to identify a knowledge gap in the literature through systematic literature review and to find out factors that affect the health and safety of the workers during PDR. To achieve the objectives, in-depth semi-structured interviews are conducted with different stakeholders such as Owners, General Contractors, Government Officials, Safety Supervisors, Engineers and Construction Workers in the context of Nepal Earthquake 2015. Interviews are conducted in a way that the respondents represent a wide range of …
Project Performance Rating Model And Ipd Implementation Guideline Metric For Water And Wastewater Treatment Plant Projects, Elie G. Andary
Project Performance Rating Model And Ipd Implementation Guideline Metric For Water And Wastewater Treatment Plant Projects, Elie G. Andary
FIU Electronic Theses and Dissertations
The public nature of water and wastewater construction capital projects has rendered Design-Bid-Build (DBB) as the delivery method of choice for such projects over the past years. Shortcomings inherent to DBB have had a negative effect on the Key Performance Indicators (KPIs) of these projects. Numerous studies have argued that Integrated Project Delivery (IPD) improves the delivery performance of DBB projects. Project delivery performance is, however, a complex concept that is not easily measured. It involves several criteria with many factors that need to be accounted for. Water and wastewater construction projects do not have well-established overall performance rating models, …
A Spectrum Sharing Based Metering Infrastructure For Smart Grid Utilizing Lte And Wifi, Imtiaz Parvez, Arif I. Sarwat
A Spectrum Sharing Based Metering Infrastructure For Smart Grid Utilizing Lte And Wifi, Imtiaz Parvez, Arif I. Sarwat
Electrical and Computer Engineering Faculty Publications
In advanced metering infrastructure (AMI) of smart grid, WiFi is an appropriate choice for its bidirectional communication requirement to transmit data to the billing center. But, WiFi functions in the free spectrum bands and LTE also requires to use the same free bands for its network expansion being licensed spectrum is limited and expansive. LTE and WiFi can operate simultaneously in the 3.5 GHz band (also known as citizen broadband radio service (CBRS)), which has large amount of free and clean spectrum. In this paper, we propose a smart grid metering infrastructure based on fixed duty cycled LTE and WiFi, …