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Articles 1 - 30 of 30
Full-Text Articles in Engineering
Bim Coordination Post Pandemic, Zachary Marshall
Bim Coordination Post Pandemic, Zachary Marshall
Honors Scholar Theses
The goal of this thesis is to utilize previous research done on virtual meetings and build upon it by conducting new research on the successes and failures of current virtual BIM meetings. This paper starts with a literature review looking into Building Information Modeling (BIM) Coordination and the effects the COVID-19 pandemic has had on the BIM meetings. BIM meetings started to shift virtual due to the nature of the pandemic and this has had effects on the performance and structure of the coordination. This knowledge was then expanded on by looking at virtual BIM meeting case studies. Interviews were …
Winter Precipitation Analysis: Comparing Integrated Multi-Satellite Retrievals For Global Precipitation Measurement (Imerg) From Satellites With Ground Instrumentation Observation, Zoe Alber
Honors Scholar Theses
The main goal of the following thesis is to evaluate the accuracy and reliability of satellite-based precipitation measurements during a winter storm event by comparing them with ground-based observations. This study is divided into several key sections, each addressing a specific aspect of the analysis. The introduction provides background information and establishes the scope of the study, highlighting the importance of accurately measuring winter precipitation for forecasting and climate studies. The subsequent literature review explores the historical context, modern uses, and future trends in winter storm detection and precipitation modeling. Then, this study explores conceptual framework utilized throughout the research …
Feasibility Study For A Continuous Mansfield Hollow State Park Multi-Use Path, Owen P. Spangler
Feasibility Study For A Continuous Mansfield Hollow State Park Multi-Use Path, Owen P. Spangler
Honors Scholar Theses
This report aims to design a pedestrian river crossing that connects the north and south ends of Mansfield Hollow State Park, utilizing both a new paved pathway and bridge construction. This report first uses GIS data to complete a feasibility study on pathway routing and cost. A preliminary route was selected based on grading and cost analysis. The requirements for constructing a multi-use pathway in the State of Connecticut were then explored, attempting to find a best-fit pathway alignment to accomplish that goal. Through a lengthy literature review, it was found that the pathway design would have to deviate from …
Calcium Ferrite As A Semiconductor For Microbially Assisted Photocatalytic Reduction Of Carbon Dioxide, Lauren King
Calcium Ferrite As A Semiconductor For Microbially Assisted Photocatalytic Reduction Of Carbon Dioxide, Lauren King
Honors Scholar Theses
The pressing issue of global climate change has been found to be attributed to the increasing concentration of greenhouse gases in the atmosphere, especially carbon dioxide. One mitigation idea to close the carbon loop is to utilize redox reactions and photocatalysis to reduce carbon dioxide to a useable fuel source, like methane or methanol. This thesis will study the possibility of using calcium ferrite as the semiconductor to perform photocatalytic reduction of carbon dioxide with the assistance of a microbial fuel cell, which will help minimize the energy required from sunlight photons. A calcium ferrite thin film was produced through …
Meta-Network Analysis Of Complex Construction Systems: Improving Project Efficiency Using Novel Computer-Based Analytic Methodology, Ethan Cummiskey
Meta-Network Analysis Of Complex Construction Systems: Improving Project Efficiency Using Novel Computer-Based Analytic Methodology, Ethan Cummiskey
Honors Scholar Theses
The objective of this study is to build upon the framework of a meta-network approach to assessing vulnerabilities in construction projects. By viewing these complex environments as configurations of various nodes and links, it is possible to show the relationship between each entity in the project and the overall completion that is achieved from these connections. To expand upon previous studies, the vulnerabilities measured from this approach will be used to optimize the current network to eliminate any shortcoming in the project model. By investigating the congruence of different agents on the project, resources and informational nodes can be supplied …
Modeling And Monitoring Of Water Quantity And Quality In Permeable Pavement Systems Using Geophysical Equipment, Abby Klimowicz
Modeling And Monitoring Of Water Quantity And Quality In Permeable Pavement Systems Using Geophysical Equipment, Abby Klimowicz
Honors Scholar Theses
Permeable pavements are a type of low impact development (LID) that reduces runoff by increasing the permeability of developed surfaces. Less runoff helps protect the surrounding ecosystems from erosion and pollution. Without pools of accumulating runoff, the potential for the development of ice on roads and parking lots is also decreased. However, sufficient research on the movement of water and the ions dissolved in it through the permeable pavement system has not been completed. In this study, geophysical equipment was used to observe how moisture, measured as volumetric water content (VWC), and ions, approximated by electrical conductivity, pass through constructed …
Impact Of Covid-19 On City Streets, Mihir Sharma
Impact Of Covid-19 On City Streets, Mihir Sharma
Honors Scholar Theses
Covid-19 has had a severe impact on the urban fabric of many cities and caused disruption to the current way of living. This paper attempts to shed light on the impact that Covid-19 has had on the city streets and how city streets have adapted to the disruptions brought on by the virus. Furthermore the paper lays down recommendations that cities can use to make their streets healthier and safer
Household Income And Air Pollution At Public Schools In The United States, Katyland Facas, Kristina Wagstrom
Household Income And Air Pollution At Public Schools In The United States, Katyland Facas, Kristina Wagstrom
Honors Scholar Theses
Poor air quality at schools may negatively impact students’ academic performance.1 2 3 In this study we look at the relationship between ambient, outdoor air quality and student socioeconomic status at United States public schools. We used free and reduced lunch eligibility, as part of the USDA’s National School Lunch Program, as an indicator of household income. We focus on nitrogen dioxide (NO2), ozone (O3), and particulate matter smaller than 2.5 microns (PM2.5). We used ambient pollutant concentration estimates at census block group resolution (Kim et al.) as the outdoor air pollution concentration at each school.4 We found a positive …
Promoting The Sustainable Utilization Of Groundwater Resources In Ethiopia Using The Integrated Groundwater Footprint Index, Xinyu Lin
Honors Scholar Theses
The country of Ethiopia is highly vulnerable to human-caused climate change and is already suffering from the effects. The predominately rural population relies heavily on small-scale agriculture, with 78% of households having at least one member engaged in the field, yet staple crops are highly susceptible to droughts and other weather shocks. Total and agricultural GDP growth in the country have been strongly linked to inter-annual rainfall variability, of which Ethiopia has among the highest in sub-Saharan Africa. A decrease in rainfall since the 1970s has been one of the primary causes of low crop yields, and stresses the immediate …
Investigation Of Activated Carbon And Protein Polysaccharide Amendments In Capping Applications For Sediment Remediation, Mehdi Begag
Honors Scholar Theses
Contaminated sediment is a major environmental problem in numerous sites across the US and requires costly treatment to effectively remediate the sediment and prevent contaminants from entering the water column. Capping of contaminated sediment has emerged as the preferred treatment design as it is more cost effective and effectively isolates the contaminants in-situ. Powdered Activated Carbon (PAC) is commonly introduced in capping designs due to its high sorption capacity of organic contaminants. However, its low bulk density and fine particle size result in significant carbon resuspension during cap placement. This report provides experimental and modeling results focused on the effects …
Wrack Lines Volume 19, Number 1, Spring/Summer 2019, Nancy Balcom, Syma Ebbin, David Gregorio, Richard Telford, Judy Benson
Wrack Lines Volume 19, Number 1, Spring/Summer 2019, Nancy Balcom, Syma Ebbin, David Gregorio, Richard Telford, Judy Benson
Wrack Lines
Issue theme is: "Making Connections: As the Climate Changes, People and Nature Intertwine in New Ways." Articles include: "As More Roads Become Rivers, Communities Search for Solutions;" "Solving an Engineering Conundrum: As Coastal Homes Get Elevated, New Research Looks at Whether Vulnerability to Wind Damage Is Increasing;" "Along the Coast, Residents Consider How to Heed Sandy's Warning of What's to Come;" "All Rivers, All Lives Run to the Sea," about the intersection of waterways and the world of nature writer Edwin Way Teale; and "Crosscurrents: Connecticut Sea Grant's Retrospective Exhibition Makes Waves," about reaching new audiences and building bridges with …
Stretchable Methyl Ammonium Lead Iodide Perovskite Solar Cells For Photovoltaic And Piezoelectric Energy Harvesting, William Tait
Stretchable Methyl Ammonium Lead Iodide Perovskite Solar Cells For Photovoltaic And Piezoelectric Energy Harvesting, William Tait
University Scholar Projects
The goal of this work was to fabricate an inverse planar perovskite solar cell (PSC) that was stretchable in one dimension and completely solution-processible. Perovskites are a material that have attracted much attention in recent years due to their appealing characteristics, such as being photovoltaic and piezoelectric. PSCs have been the focus of many studies in the solar cell area, as they are solution-processible and have shown high efficiencies relative to the amount of time they have been studied. Fabricating a PSC on a stretchable substrate would be beneficial, as a bendable, stretchable PSC would likely have more applications than …
Structural Cyber-Physical Systems: A Confluence Of Structural Health Monitoring And Control Technologies, Rosana E. Martínez-Castro, Shinae Jang
Structural Cyber-Physical Systems: A Confluence Of Structural Health Monitoring And Control Technologies, Rosana E. Martínez-Castro, Shinae Jang
CEE Articles
Many bridges in the nation’s transportation infrastructure network have been found to be structurally deficient. In face of a natural or man-made disaster, this poses a serious threat to the execution of emergency respondent logistics, as the failure of such structures could disconnect communities from the necessary provisions and services that must remain accessible after a disaster. To predict such an eventuality, dependable information on structural status for decision-making can be obtained from structural health monitoring (SHM) systems. However, the avoidance of such a situation is preferred. Structural control systems offer an option to improve structural response during extreme loading …
Effect Of Surface Modifying Biopolymers On Sand Cohesion, Connor H. Ligeikis
Effect Of Surface Modifying Biopolymers On Sand Cohesion, Connor H. Ligeikis
Honors Scholar Theses
Coastal erosion is a substantial problem in the United States and throughout the world. A novel approach to mitigating this problem is through the application of surface-modifying biopolymers to sand on beaches. Field research conducted by Dr. Amine Dahmani has shown that these organic complexes can coat granular sediments and increase sediment cohesion, thereby decreasing the erodability of the sediment. The goal of this thesis is to quantify the impact of proprietary surface-modifying biopolymer formulations on sand cohesion in order to better engineer this innovative solution for sand retention and potentially contaminated sediment sand cap stabilization. The impact of the …
Stability And Redispersion Of Platinum Nanoparticle Suspensions For Attachment To Dyes In Low-Cost Solar Cells, Jeffrey Rothstein
Stability And Redispersion Of Platinum Nanoparticle Suspensions For Attachment To Dyes In Low-Cost Solar Cells, Jeffrey Rothstein
Honors Scholar Theses
The project involves optimizing the synthesis, washing, and redispersion of platinum nanoparticles. The nanoparticles are to be attached to dye molecules where they will act as nanocatalysts to reduce energy losses in low-cost dye-sensitized solar cells. The goal is to develop a process based on a pure or mixed solvent that will maintain a stable dispersion of the nanoparticles without interfering with their ability to bond with the dye molecules in the solar cell.
Hydrogeological Conceptual Model Of La Villa River Watershed, Republic Of Panama, Maria G. Castrellon Romero
Hydrogeological Conceptual Model Of La Villa River Watershed, Republic Of Panama, Maria G. Castrellon Romero
Honors Scholar Theses
Groundwater in Panama is a valuable and poorly understood resource. Its exploitation has increased 75% in the past decade, reaching a total value of 700,000 m3/day or 185 million gallons per day (MGD). Climate change has caused a lengthening of the dry season, which has reduced precipitation and streamflow, resulting in surface water scarcity during this period. Nevertheless, it has not been possible to determine the extent to which groundwater sources have been affected by these factors since systematic monitoring of groundwater levels has not been implemented in Panama. With support from National Institution of Drinking Water Supply …
Quantum Mechanical Modeling Of Organic-Oxide Surface Complexation Reactions, Brianna Datti
Quantum Mechanical Modeling Of Organic-Oxide Surface Complexation Reactions, Brianna Datti
Honors Scholar Theses
Recent advancements in agriculture, industry, and pharmaceutical formulations have increased the presence of organic contaminants in the environment. It is important and necessary to study and understand the processes which control the environmental fate and transformation of contaminants and improve removal and remediation techniques. The use of advanced quantum mechanical modeling is a promising technique to better understand the mechanisms of adsorption within the environment. Relative Gibbs free energy values of adsorption have been calculated using such modeling for selected organic acids sorption to iron oxides, revealing the thermodynamic favorability of each of the reactions, except one involving bidentate mononuclear …
A Simple Formula To Calculate Azimuth Without A Two-Argument Arctangent Function, Thomas H. Meyer, Jacob Conshick
A Simple Formula To Calculate Azimuth Without A Two-Argument Arctangent Function, Thomas H. Meyer, Jacob Conshick
Department of Natural Resources and the Environment Articles
Calculating azimuths from planimetric coordinates is complicated when the available implementations of inverse trigonometric functions have ranges spanning only 180° instead of 360° as azimuth requires. A tangent half-angle formula is used to derive a formula with only one special case (due South) that computes azimuth for the whole circle.
Urban Parking Economics And Land Consumption: A Case Study Of New Haven, Connecticut And Cambridge, Massachusetts, Bryan P. Blanc
Urban Parking Economics And Land Consumption: A Case Study Of New Haven, Connecticut And Cambridge, Massachusetts, Bryan P. Blanc
Honors Scholar Theses
It has become increasingly apparent that providing copious off-street parking has deleterious effects on urban form and function. This study compares parking policy in New Haven, Connecticut and Cambridge, Massachusetts that have pursued very different types of parking policies that have resulted in different outcomes in terms of land use. Since 1951, off-street parking provision has increased by nearly 400% in New Haven, meanwhile both employment and residential population have declined in the city. In contrast, off-street parking provision in Cambridge has risen around 140% since 1952, while employment and residential populations in the city have increased by 50% and …
Impacts And Analysis For Buildings Under Terrorist Attacks, Edward Eskew, Shinae Jang
Impacts And Analysis For Buildings Under Terrorist Attacks, Edward Eskew, Shinae Jang
CEE Articles
No abstract provided.
Constitutive Model For Rate Dependent Behavior Of Clay Internal Geotechnical Report 2011-3, Harry Martindale, Dipanjan Basu
Constitutive Model For Rate Dependent Behavior Of Clay Internal Geotechnical Report 2011-3, Harry Martindale, Dipanjan Basu
Technical Reports
This report presents a strain-rate dependent plastic constitutive model for clays. Based on the concepts of critical-state soil mechanics and bounding surface plasticity theory, the model reproduces the mechanical response of clays under multi-axial loading conditions and predicts both the drained and undrained behavior. The model parameters are determined for Boston Blue Clay, London Clay and Kaolin Clay, and the performance of the model in simulating the mechanical response of these clays is demonstrated for low to medium strain rates. The sensitivity of each model parameter is checked by perturbing the calibrated values by ±20%. Subsequently, a probabilistic analysis using …
A High Strain-Rate Constitutive Model For Sand With Application In Finite Element Analysis Internal Geotechnical Report 2011-4, William Higgins, Dipanjan Basu
A High Strain-Rate Constitutive Model For Sand With Application In Finite Element Analysis Internal Geotechnical Report 2011-4, William Higgins, Dipanjan Basu
Technical Reports
The report presents a constitutive model for simulating the high strain-rate behavior of sands. Based on the concepts of critical-state soil mechanics, the bounding surface plasticity theory and the overstress theory of viscoplasticity, the constitutive model simulates the high strain-rate behavior of sands under uniaxial, triaxial and multiaxial loading conditions. The model parameters are determined for Ottawa and Fontainebleau sands, and the performance of the model under extreme transient loading conditions is demonstrated through simulations of split Hopkinson pressure bar tests up to a strain rate of 2000/sec. The constitutive model is implemented in a finite element analysis software to …
Fourier Finite Element Analysis Of Laterally Loaded Piles In Elastic Media Internal Geotechnical Report 2011-1, William Higgins, Dipanjan Basu
Fourier Finite Element Analysis Of Laterally Loaded Piles In Elastic Media Internal Geotechnical Report 2011-1, William Higgins, Dipanjan Basu
Technical Reports
Laterally loaded piles are analyzed using the Fourier finite element method. Pile response was observed to be a function of the relative stiffness of pile and soil and of the pile slenderness ratio. The analysis is mostly performed for piles embedded in elastic soil with constant and linearly varying modulus although the pile response in two-layer soil profiles is also investigated. Equations describing pile head deflection, rotation and maximum bending moment are proposed for flexible long piles and stubby rigid piles. The design equations were developed after plotting the pile responses as functions of pile-soil stiffness ratio and pile slenderness …
Sustainability In Geotechnical Engineering Internal Geotechnical Report 2011-2, Aditi Misra, Dipanjan Basu
Sustainability In Geotechnical Engineering Internal Geotechnical Report 2011-2, Aditi Misra, Dipanjan Basu
Technical Reports
The built environment serves as a dynamic interface through which the human society and the ecosystem interact and influence each other. Understanding this interdependence is key to understanding sustainability as it applies to civil engineering. There is a growing consensus that delivering a sustainable built environment starts with incorporating sustainability thoughts at the planning and design stages of a project. Geotechnical engineering is the most resource intensive of all the civil engineering disciplines and can significantly influence the sustainability of infrastructure development because of its early position in the construction process. In this report, a review is made of the …
The River Discontinuum: Applying Beaver Modifications To Baseline Conditions For Restoration Of Forested Headwaters, Denise Burchsted, Melinda Daniels, Robert Thorson, Jason Vokoun
The River Discontinuum: Applying Beaver Modifications To Baseline Conditions For Restoration Of Forested Headwaters, Denise Burchsted, Melinda Daniels, Robert Thorson, Jason Vokoun
Center for Integrative Geosciences
Billions of dollars are being spent in the United States to restore rivers to a desired, yet often unknown, reference condition. In lieu of a known reference, practitioners typically assume the paradigm of a connected watercourse. Geological and ecological processes, however, create patchy and discontinuous fluvial systems. One of these processes, dam building by North American beavers (Castor canadensis), generated discontinuities throughout precolonial river systems of northern North America. Under modern conditions, beaver dams create dynamic sequences of ponds and wet meadows among free-flowing segments. One beaver impoundment alone can exceed 1000 meters along the river, flood the valley laterally, …
Improving Surveying Accuracy And Efficiency In Connecticut: An Accuracy Assessment Of Geoid03 And Geoid09, Thomas H. Meyer, Robert Baron
Improving Surveying Accuracy And Efficiency In Connecticut: An Accuracy Assessment Of Geoid03 And Geoid09, Thomas H. Meyer, Robert Baron
Department of Natural Resources and the Environment Articles
Comparing published NAVD 88 Helmert orthometric heights of First-Order bench marks against GPS-determined orthometric heights showed that GEOID03 and GEOID09 perform at their reported accuracy in Connecticut. GPS-determined orthometric heights were determined by subtracting geoid undulations from ellipsoid heights obtained from a network least-squares adjustment of GPS occupations in 2007 and 2008. A total of 73 markers were occupied in these stability classes: 25 class A, 11 class B, 12 class C, 2 class D bench marks, and 23 temporary marks with transferred elevations. Adjusted ellipsoid heights were compared against OPUS as a check. We found that: the GPS-determined orthometric …
Creating Useful Products From Connecticut's 2000 Lidar Data Set Jhr 08-314 Project 07-2, Thomas H. Meyer
Creating Useful Products From Connecticut's 2000 Lidar Data Set Jhr 08-314 Project 07-2, Thomas H. Meyer
Department of Natural Resources and the Environment Articles
The State of Connecticut owns a LIght Detection and Ranging (LIDAR) data set that was collected in 2000 as part of the State’s periodic aerial reconnaissance missions. Although collected eight years ago, these data are just now becoming ready to be made available to the public. These data constitute a massive “point cloud”, being a long list of east-north-up triplets in the State Plane Coordinate System Zone 0600 (SPCS83 0600), orthometric heights (NAVD 88) in US Survey feet. Unfortunately, point clouds have no structure or organization, and consequently they are not as useful as Triangulated Irregular Networks (TINs), digital elevation …
The Effect Of Broadleaf Canopies On Survey-Grade Horizontal Gps/Glonass Measurements, Thomas H. Meyer, John E. Bean, C. Roger Ferguson, James M. Naismith
The Effect Of Broadleaf Canopies On Survey-Grade Horizontal Gps/Glonass Measurements, Thomas H. Meyer, John E. Bean, C. Roger Ferguson, James M. Naismith
Department of Natural Resources and the Environment Articles
A study was conducted to empirically determine the degradation of survey-grade GPS horizontal position measurements due to the effects of broadleaf forest canopies. The measurements were taken using GPS/GLONASS-capable receivers measuring C/A and P-codes, and carrier phase. Fourteen survey markers were chosen in central Connecticut to serve as reference markers for the study. These markers had varying degrees of sky obstruction due to overhanging tree canopies. Sky obstruction was measured by photographing the sky with a 35mm reflex camera fitted with a hemispherical lens. The negative was scanned and the image mapped using an equal- area projection to remove the …
Annotated Biobliography Of Remote Sensing For Highway Planning And Natural Resources, An, Daniel L. Civco, William C. Kennard, Michael Wm. Lefor
Annotated Biobliography Of Remote Sensing For Highway Planning And Natural Resources, An, Daniel L. Civco, William C. Kennard, Michael Wm. Lefor
Storrs Agricultural Experiment Station
No abstract provided.
Handbook Of Remote Sensing Imagery Of Connecticut, Daniel L. Civco, William C. Kennard, Michael Wm. Lefor
Handbook Of Remote Sensing Imagery Of Connecticut, Daniel L. Civco, William C. Kennard, Michael Wm. Lefor
Storrs Agricultural Experiment Station
No abstract provided.