Engineering Commons^™

2021 Final Butte Reduction Works (Brw) Smelter Area Mine Waste Remediation And Contaminated Groundwater Hydraulic Control Site Phase Iii Quality Assurance Project Plan (Qapp), Pioneer Technical Services, Inc.

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

Bending-Torsion Flutter Analysis Of A Viscoelastic Tapered Wing Carrying An Engine And Subjected To A Follower Thrust Force, Youssef Shaaban Abdelfattah Matter

Theses

Flutter, a dynamic divergent instability, is one of the significant phenomena of Aeroelasticity. This dangerous aeroelastic phenomenon can occur to any flexible structure subjected to aerodynamic forces such as aircraft wings, bridges, buildings, etc. It is important to analyze the flutter in order to predict the speed and frequency at which it occurs so that structural damages and failures can be avoided. This thesis is concerned with non-dimensional parametric modeling of the flutter of a viscoelastic tapered wing with an attached engine. The main objectives of this thesis are to determine regions of stability and boundaries of flutter speed and …

The Influence Of Channel Deepening On Tides, River Discharge Effects, And Storm Surge, Stefan A. Talke, Ramin Familkhalili, David A. Jay

Civil and Environmental Engineering Faculty Publications and Presentations

We combine archival research, semi-analytical models, and numerical simulations to address the following question: how do changes to channel geometry alter tidal properties and flood dynamics in a hyposynchronous, strongly frictional estuary with a landward decay in tidal amplitudes? Records in the Saint Johns River Estuary since the 1890s show that tidal range has doubled in Jacksonville, Florida. Near the estuary inlet, tidal discharge approximately doubled but tidal amplitudes increased only ~6%. Modeling shows that increased shipping channel depths from 5-6 to ~13m drove the observed changes, with other factors like channel shortening and width reduction producing comparatively minor effects. …

An Overview On Deficit And Requirements Of The Irish National Soil Phosphorus Balance, Ciarán O'Donnell, Aoife Egan, Joseph R. Harrington, Denise Barnett, Patrick Forrestal, Niamh Power

Publications

Phosphorus (P) is an essential life-supporting nutrient for which there is no substitute. Modern farming practice and food production are supported by the application of mineral P fertiliser derived from finite mined phosphate rock. The European Union does not have indigenous mineral phosphate reserves, which poses a significant issue to food security. This research paper assesses the potential of indigenous recycled P sources to replace imported P fertiliser within the Republic of Ireland. The research is undertaken at NUTS 3 (Nomenclature of Territorial Units) regional level, the nutrient soil P requirement is established, and the extent to which the …

Distance-Based Formation Control Using Decentralized Sensing With Infrared Photodiodes, Steven Williams

LSU Master's Theses

This study presents an onboard sensor system for determining the relative positions of mobile robots, which is used in decentralized distance-based formation controllers for multi-agent systems. This sensor system uses infrared photodiodes and LEDs; its effective use requires coordination between the emitting and detecting robots. A technique is introduced for calculating the relative positions based on photodiode readings, and an automated calibration system is designed for future maintenance. By measuring the relative positions of their neighbors, each robot is capable of running an onboard formation controller, which is independent of both a centralized controller and a global positioning-like system (e.g., …

Development Of Cracking Resistance Prediction Model Of Long-Term Aged Asphalt Mixtures, Peyman Barghabany

LSU Doctoral Dissertations

With the increasing complexity of asphalt mixture composition, the current volumetric-based Superpave mixture design would not be sufficient to address durability concerns. To address this limitation, performance-based testing is introduced to supplement conventional volumetric mixture design in assessing the cracking resistance of asphalt mixtures. To perform cracking tests, samples need to be aged to represent the most embrittlement case. The current AASHTO standard for asphalt mixture long-term aging (LTA) is a 5-day oven-aging at 85°C. Quality control/assurance practices require samples to be long-term aged prior to a cracking test which is a time-consuming process. Therefore, it would be beneficial to …

Bibliometric Survey On Reuse Of Treated Wastewater For Agriculture, Sagar Kolekar Prof., Rahul Raghvendra Joshi Prof., Kalyani Dhananjay Kadam Prof., Kanchan Khare Dr., Pennan Chinnasamy Dr.

Library Philosophy and Practice (e-journal)

The water is important for life after air but there is water shortage problem worldwide. The untreated wastewater pollutes fresh water resources. The reuse of treated wastewater for crop irrigation will reduce stress on freshwater and also provides nutrients. Wastewater had been reused for many generations, it was first discovered in 1973 and in continuation there onwards till today. The treated-wastewater reuse for irrigation of crops will reduce stress on freshwater and also provides nutrients. The main objective of this bibliometric study is analyze the research work done in the past in relation to wastewater treatment and its reuse. This …

Assessing Change In Runoff Water Parameters Through Road Shoulder Vegetated Filter Strips: Experimental Comparison Of Soils And Engineered Infiltration Media, Andrew Corrado, Mohammad Shokri

The Pegasus Review: UCF Undergraduate Research Journal

Placement of Vegetated Filter Strips (VFS) along roadways may facilitate removal of nutrients from stormwater runoff. The objective of this research is to compare water quality performance of a VFS containing engineered media to that of typical Florida sandy soil. Storms of variable intensity were simulated over two 1:1 scale physical models of typical one- and two-lane roadway shoulders, one with engineered media (treatment), and one without (control). Simulated roadway runoff was introduced as sheet flow from the roadway and precipitation was applied with a rainfall simulator. Samples of runoff and infiltrate were tested for Dissolved Oxygen (DO) concentration and …

Using Artificial Neural Network To Calculate Steady State Conditions, Nuriddin Nurali O'G'Li Normamatov, Muzaffar Burhanovich Khudayarov, Temurkhan Abduvahab O'G'Li Ikramov

Karakalpak Scientific Journal

The power systems steady-state problem are described by a system of nonlinear equations, and for their solution are widely used iterative techniques such as the Newton-Raphson and others. Recently, techniques based on the use of genetic algorithms, the theory of fuzzy sets, artificial neural networks have been applied to solve this problem. In this article feedforward neural networks are used for calculating the steady-state regimes. The modeling results were obtained with the results of calculations using the Newton-Raphson method.

Survey Of Unvented Attics In Climate Zone 2a, Florida Solar Energy Center, Eric Martin

FSEC Energy Research Center®

Moisture risk must be managed in unvented attics to ensure durability of components and longevity of the system. The FSEC Energy Research Center (FSEC), at the University of Central Florida tested and collected data in six homes in the northern Florida portion of IECC Climate Zone 2A built after 2015 with unvented (semi-conditioned) attics to add to the body of knowledge on the accumulation of moisture in the attic and its effects on roof moisture that can impact durability.

Developing Eco-Friendly And Cost-Effective Porous Adsorbent For Carbon Dioxide Capture., Mahboubeh Nabavinia, Baishali Kanjilal, Noahiro Fujinuma, Amos Mugweru, Iman Noshadi

Henry M. Rowan College of Engineering Departmental Research

To address the issue of global warming and climate change issues, recent research efforts have highlighted opportunities for capturing and electrochemically converting carbon dioxide (CO2). Despite metal doped polymers receiving widespread attention in this respect, the structures hitherto reported lack in ease of synthesis with scale up feasibility. In this study, a series of mesoporous metal-doped polymers (MRFs) with tunable metal functionality and hierarchical porosity were successfully synthesized using a one-step copolymerization of resorcinol and formaldehyde with Polyethyleneimine (PEI) under solvothermal conditions. The effect of PEI and metal doping concentrations were observed on physical properties and adsorption results. The results …

Power System Optimization Methods: Convex Relaxation And Benders Decomposition, Minyue Ma

USF Tampa Graduate Theses and Dissertations

Power system optimization methods are wildly used to solve power system problems. Engineers adopt different methods to keep the reliability and efficiency of the power system operation, planning and control. This dissertation focuses on the application and implementation of two optimization methods: Convex relaxation and Benders' decomposition.

The first part of the dissertation focuses on the application of convex relaxation to solve Alternating Current Optimal Power Flow (ACOPF) problems. In the completed work, a 3-node cycle based sparse convex relaxation is proposed to solve ACOPF problems. This method adds virtual lines in minimal chordless cycles to decompose each of them …

Prediction Of Self-Diffusion Constants In Model And Real Systems Using Machine Learning, Joshua P. Allers

Chemical and Biological Engineering ETDs

Understanding diffusion of chemical compounds is important for the design and optimization of many chemical engineering and energy processes. Recent modifications to the Darken equation allow for accurate prediction of Maxwell-Stefan (MS) diffusion in mixtures. Still, there are few practical applications due to the requirement of individual self-diffusion constants. A reliable predictive model for self-diffusion constants would be highly valuable when used in conjunction with the modified Darken equation. Here, we show that Machine Learning (ML) can be used to develop generalized models for self-diffusion in Lennard Jones (LJ) systems and real systems of pure solutions. The use of Artificial …

On The Toe Stability Of Rubble Mound Structures, Amir Etemad-Shahidi, Meysam Bali, Marcel R. A. Van Gent

Research outputs 2014 to 2021

Toe design is an important task for coastal engineers as it ensures the stability of the main armor layer and prevents scour in front of the armor slope. Several laboratory experiments have been conducted to investigate the toe stability using different testing approaches, i.e. damage due to a single test condition and cumulative damage due to a number of conditions. In addition, the methods of measuring and reporting damage to the toe are not the same as some researchers have counted only stones that were washed away from the toe; while others counted all the stones that have been displaced. …

A Modular Framework For Multi-Rotor Unmanned Aerial Vehicles For Military Operations, Dante Tezza

USF Tampa Graduate Theses and Dissertations

Multi-rotor Unmanned Aerial Vehicles (MR-UAV) are commonly used in a wide range of military operations. However, current MR-UAV models have limited payload capabilities and flight time, making it impractical for a single system to be well-suited for different applications. For instance, a drone designed to carry heavier equipment is not well suited for uses that require agility and speed. Therefore, military organizations employ multiple MR-UAV models, leading to complex logistics, training, and overall increased costs.

This dissertation presents a modular MR-UAV framework that allows a user to quickly tailor the aircraft for different military operations by easily changing modular parts …

Polymer Based Triboelectric Nanogenerator For Cost‐Effective Green Energy Generation And Implementation Of Surface‐Charge Engineering, Diana Lopez, Aminur Rashid Chowdhury, Abu Masa Abdullah, Muhtasim Ul Karim Sadaf, Isaac Martinez, Brishty Deb Chowdhury, Serena Danti, Christopher J. Ellison, Karen Lozano, Mohammed Jasim Uddin

School of Integrative Biological & Chemical Sciences (Formerly Dept. of Chemistry)

Performance of triboelectric nanogenerators for harvesting mechanical energy from the ambient environment has been limited by structural complexity, cost-effectiveness, and mechanical weakness of materials. Herein, a cost-effective vertical contact separation mode triboelectric nanogenerator using polyethylene (PE) and polycarbonate (PC) in a regular digital versatile disc is reported. This cost-effective nanogenerator with simplified structures is able to generate an open-circuit voltage of 215.3 V and short-circuit current of 80 μA. The effects of the distance of impact and the air gap between the triboelectric layers have also been tested from 3 to 9 cm, and 0.25 to 1 cm, respectively. It …

Assessment Of The Environmental Sustainability Of A Small Water Production Facility In Madagascar, Jesal Patel

USF Tampa Graduate Theses and Dissertations

Nearly 2.2 billion people around the globe struggle with access to safely managed drinking water (WHO/UNICEF, 2019), however, there have been certain initiatives taken, particularly by means of small water production facilities for enhancing access to basic drinking water services in rural areas. The water production facility, specifically located in the low- and middle-income countries, usually encounter operational difficulties as a result of limited availability of resources and are required to depend on other resourceful countries for goods and services. Although, with limited research done for assessing the environmental sustainability of water facilities in low- and middle-income countries, numerous data …

Graph Automorphic Approaches To The Robustness Of Complex Networks, Hossein Parastvand, Airlie Chapman, Octavian Bass, Stefan Lachowicz

Research outputs 2014 to 2021

Leveraging on graph automorphic properties of complex networks (CNs), this study investigates three robustness aspects of CNs including the robustness of controllability, disturbance decoupling, and fault tolerance against failure in a network element. All these aspects are investigated using a quantified notion of graph symmetry, namely the automorphism group, which has been found implications for the network controllability during the last few years. The typical size of automorphism group is very big. The study raises a computational issue related to determining the whole set of automorphism group and proposes an alternative approach which can attain the emergent symmetry characteristics from …

Coal Pyrolysis Models For Use In Massively Parallel Oxyfuel-Fired Boiler Simulations, Andrew Perry Richards

Theses and Dissertations

Accurately modeling key aspects of coal combustion allows for the virtual testing and application of new technologies and processes without the need for investments in lab- and pilot-scale facilities, since such facilities may only be used for a few small tests. However, modeling of subprocesses must not only be accurate but computationally efficient. Modeling of coal devolatilization reactions and processes are one of the important parts of large-scale simulations of coal combustion systems. The work presented here details efforts to improve the modeling of coal devolatilization processes in massively-parallel simulations of coal combustors, including: (1) devolatilization rate/yield models, (2) modeling …

Adventuring Into Complexity By Exploring Data: From Complicity To Sustainability, Tim Lutz

Northeast Journal of Complex Systems (NEJCS)

Problems of sustainability are typically represented by major present-day challenges such as climate change, biodiversity loss, and environmental and social injustice. Framed this way, sustainable lives and societies depend on finding solutions to each problem. From another perspective, there is only one problem behind them all, stated by Gregory Bateson as: “…the difference between how nature works and the way people think,” and complexity provides a way to define and approach this problem. I extend Edgar Morin’s conceptions of restricted and general complexity into pedagogy to address problems of simplicity and reductionist teaching. The proposed pedagogy is based on long …

Escaping Destructive Communities Towards An Underground Utopian Space, Rana Dghaily

Architecture and Planning Journal (APJ)

Going to the underground has always been the escape for people in harsh cases like wars and natural disasters. While the city centers are surrendered to the seizing through global capital, more density is forced on the territories of the city in the form of urban sprawl, leading to the uncontrolled, unplanned and unrestricted urban spreading, and then forcing to look for an escape for this continuous growth. Subterranean architecture would be the escaping solution that architects will depend on in the future. Subterranean architecture refers to the underground structure that is built in unique sites and where traditional buildings …

Detecting A New Approach To Revive Dystopian Paranoid Sites, Shadi Osta, Marwan Halabi, Maged Youssef

Architecture and Planning Journal (APJ)

Until the nineteenth century, space delineation was tied only to the architectural norm, and even now, space is considered as a fundamental area that provide a safe and shelter for its user. Architecture historically has evolved significantly, altering the way people perceive space. Anciently, world civilization used to pay great attention in portraying semiotic of spatial experience in their architectural practices. Back when reflecting moods in architecture was part of utilization of the function. Moreover, Civilization has revolutionized the means of spatial delineation due to new trends in technological evolution. Therefore, to comprehend this association, the studies can distinguish how …

Exploring Utopian Concepts In The Contemporary Water Architecture, Aya Chehab, Hiba Mohsen

Architecture and Planning Journal (APJ)

Water has since the beginning of civilizations been known to be the vital component of mankind’s existence. The inseparable relation between architecture and water is well-established from the beginning of ages where humans first settlements arose; that inevitably led to the creation of long-lasting shelters. Despite their strong bond, the architectural relationship with water has been through an unfortunate downfall throughout the years. Some contemporary architects admire to achieve an innovative approach in their projects, but are still lacking the risk of incorporating water as a key component for it; where it can act as a symbol of grandeur, creating …

Impact Of Urban City Sprawl On The Identity Of Suburbs And Rural Areas, Fadi Nasreddine

Architecture and Planning Journal (APJ)

Urban sprawl is the rapid expansion of the city towards the suburbs and the countryside, and it happens for various reasons. The first one is of residential nature, and is a result of growing population density while others are of political, economic, and social nature. There is no doubt that the city's encroachment towards the countryside and the emergence of new patterns of construction such as buildings and transportation networks have more drawbacks than advantages, in developing countries, especially in the absence of planning. This phenomenon causes the rise of real estate prices that leads to a change in the …

Exploring A New Housing Design Paradigm For Post Pandemic Multi-Story Buildings In Lebanon, Rachid M. Hajjar

Architecture and Planning Journal (APJ)

When the fast-spreading COVID-19 was announced as a pandemic by the World Health Organization (WHO), people around the world rushed to go home. This worldwide widespread altogether affected our individual and proficient lives and features a coordinate bearing upon the exceptionally establishments of design hypothesis. As a result, the pandemic has contributed to concerns about how architects and designers should view and install antivirus-related ideas or redesign current spaces, as well as at what point our physical and built environment could be impacted by the pandemic. In forecasting the post-pandemic style and visualizing the appropriate antivirus scheme, the answers to …

Dynamics Of Running Processes In The Area Of Underless Water Intake, D.R. Bazarov, M.P. Tashkhanova, A. Gayur, M. Sapaeva

Irrigation and Melioration

The paper analyzes the dynamics of channel processes based on the results of field studies of the Amudarya River at the site of the damless water intake to the Karshi Magistralny Canal (KMK) and developed recommendations for improving the water intake conditions. Based on the results of field studies of the head section of the inlet channel, an assessment of the state of the Amudarya river bed in the water intake zone was made. The results of studies of the hydraulic and alluvial regimes of the Amu Darya River in the area of the damless water intake are generalized The …

Determination Of The Optimal Hydromodule Of Irrigation Network For Drip Irrigation, R.Zh. Karshiev, A. Urazkeldiev, A.H. Radjabov, A.I. Ernazarov

Irrigation and Melioration

Most of the irrigation canals operating in the country were built in the 60s and 80s of the XX century, their hydraulic parameters were designed and adapted to the irrigation regimes of agricultural crops, mainly for surface irrigation, and the average hydromodule values were 0,8-1,0 l / s. , the hydraulic parameters of the channel are designed to carry large volumes of water in a short period of time. Over the next 3-4 years, the introduction of water-saving technologies in the irrigation of agricultural crops by farms and "Clusters" requires the improvement of hydraulic methods of irrigation management, the use …

Assessment Of The Impact Of Climate Change On Hydrological Processes In The Chirchik River Basin, Kh.Sh. Gafforov, Sh.D. Sh.D.Tursunboev

Irrigation and Melioration

The importance of assessing past and future climate differences plays an important role in future planning in relation to climate change. This situation requires urgent and concerted action in several areas: technology, infrastructure, politics, economics, and the environment. The article evaluates the impact of changes in precipitation intensity on the water level in the global circulation model (GCM) RCP 4.5 and 8.5 scenarios in the 2030s, 2050s, and 2070s. This study is a useful reference for improving water resource management and ensuring the sustainability of agricultural products in the future, as well as for improving operational water management and agricultural …

Assessment Of The Impact Of Climate Change On Hydrological Processes In The Chirchik River Basin, В.K. Saliev

Irrigation and Melioration

The article examines the assessment of the state and problems of irrigation water use in the republic in the past and in the near future. A comparative analysis of the state of water resources use for the period of the last 30 years from 1989 to 2019 was carried out.According to the estimates, own water withdrawal for 5 years (2014/15-2018/19) shows that an average of 53.2 m3, including 50.5 billion m3 from rivers At present (2018-2019), an average of 57.06 billion m3 of water is taken for irrigation of 4.289 million hectares of land, against 63.02 billion m3 approved in …

Environmental Damage Caused By Transport Equipment Waste, M. Radkevich, K. Shipilova, M. Abdukodirova, O. Pochugevski

Irrigation and Melioration

The article suggests a new approach to the monetary assessment of the damage caused to the environment by the processed waste of the transport sector. The proposed assessment method is based on the waste collection factor, all types of irretrievable losses and the volume of necessary compensatory release of materials. Based on a survey among vehicle owners, it was found that the solid waste collection rate is about 50 %, while the waste collection rate for operating fluids does not exceed 32 %. In this regard, the bulk of the damage to the environment is caused by liquid waste. Calculations …