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Title: INVESTIGATING THE SIGNIFICANCE OF HALF-SATURATION COEFFICIENTS ON WASTEWATER TREATMENT PROCESSES
Creator: Shaw, Andrew Robert
Date: 2015, 2015-05
Description: This research is focused on the half-saturation coefficient (KS), which is an important, but often overlooked, parameter in the Monod equation...
Show moreThis research is focused on the half-saturation coefficient (KS), which is an important, but often overlooked, parameter in the Monod equation commonly used to describe biological wastewater treatment processes. Following an initial literature review, the research uses data for a denitrifying activated sludge process to show that KS is a function of the maximum rate and, further, that the relationship can be described either using a simple linear regression or by modeling diffusion explicitly. Building on this initial investigation of a particular treatment system, the research introduces and uses a “porter-diffusion” model that approximates diffusion to a linear equation for KS in the Monod equation. This is used to describe the linear relationship between KS and maximum rate for four different biological wastewater treatment systems. Finally, a sensitivity analysis is carried out on the parameters in the porter-diffusion model to show that r0 – a measure of cell size or diffusion distance – is the most sensitive parameter for a simple activated sludge process model based on a modified version of the International Water Association (IWA) activated sludge model #1 (ASM1). Overall this research has shown that in all of the biological wastewater treatment systems investigated in this thesis: (1) KS is not a constant but is a function of the maximum rate; (2) diffusion is a dominant mechanism that influences KS; (3) that a suitable expression for KS can be estimated using the porter-diffusion model, a linear data fit, or by modeling diffusion explicitly; and (4) measurements of KS in the laboratory must be carried out at the same food-to-microorganism (F/M) ratio as the full-scale system under investigation.
Ph.D. in Civil Engineering, May 2015
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Title: SEISMIC STUDY OF DUCTILE AND NON-DUCTILE CONCENTRICALL1 BRACED FRAMES
Creator: Sutchiewcharn, Narathip
Date: 2013, 2013-07
Description: Braced Frames, both ductile and non-ductile systems, are in high demand due to their considerable strength and attractiveness. Therefore, the...
Show moreBraced Frames, both ductile and non-ductile systems, are in high demand due to their considerable strength and attractiveness. Therefore, the better understanding of their behaviors will be beneficial, in which, is the focus in this study. With different failure modes expected based on design methodology, the study of non-ductile system is focused on connections and their contributions toward performance of frame systems, while the ductile system is concentrated on the behavior of braces itself. For non-ductile system with the model-based simulation approach, local brace connection models were developed extending from the validation with the existing specimens. Then, the extensive seismic global performances including local joints, from both local brace and gravity frame connections, are evaluated with the adaptation of collapse methodology outlined in FEMA-P695. For ductile system, with the expectation of hinges formed in braces causing by buckling, the global performances under reversal loadings, e.g. ground motions, are in jeopardy due to the strength degradation. Taking advantage of FEM simulations in addition to testing, the proposed tube-in-tube brace configuration is introduced as buckling-controlled brace (BCB). The effects of parameters are studied using analytical models. The performances observed from proposed tube-in-tube configuration are satisfied under both monotonic and cyclic loadings.
PH.D in Civil Engineering, July 2013
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Title: Original report to Lakeworth inlet district
Creator: Hills, G. B.
Date: 2009, 1918
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/originalreportto00hill
Thesis (B.S.)--Armour Institute of Technology

Title: Sanitation of the Isthmus of Panama during the constructive period
Creator: Smith, S. M
Date: 2009, 1915
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/sanitationofisth00smit
Thesis (B.S.)--Armour Institute of Technology, 1915 Bibliography: leaf 39 B.S. in Civil...
Show morehttp://www.archive.org/details/sanitationofisth00smit
Thesis (B.S.)--Armour Institute of Technology, 1915 Bibliography: leaf 39 B.S. in Civil Engineering, 1915
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Title: HEURISTIC DECISION-MAKING MODEL FOR ELECTRICAL FOREMEN WHEN WORKFLOW IS DISRUPTED
Creator: Pandey, Arjun R.
Date: 2016, 2016-05
Description: The decision-making process used by construction foremen at a job site when the workflow is disrupted was investigated in this study. The...
Show moreThe decision-making process used by construction foremen at a job site when the workflow is disrupted was investigated in this study. The foremen’s decision-making process was mapped and then modeled to a heuristic model. This study focuses on cognitive decision or psychological heuristic models. The study shows that construction foremen use a heuristic decision model in their decision-making. The capability of heuristic to yield fast decision is very useful in construction because it is common for a construction foreman to experience several disruptions during the course of a single workday. With heuristic decision-making, a work-around decision can be rapidly and effectively made following a construction site disruption. Understanding the ability of heuristics to facilitate rapid and effective decision-making will help the construction industry to save time and increase productivity. Research was conducted in order to map a decision process that foremen were using in their decision-making and to develop a model for a heuristic decision-making process. Interviews were conducted with 22 construction foremen in the electrical trade in 88 real disruption cases in order to understand how decisions were made after disruptions occurred. Interviews were subsequently conducted with 10 additional industry foremen in 10 real disruption cases to validate the data. Using this data, a heuristic decision-making model was developed. To validate this model, a survey was conducted with another 11 industry foremen. The findings indicate that construction foremen currently use a heuristic decision-making model known as “determinant decision attribute” (referred to as DDA) heuristics model. This DDA heuristic model was compared to the similar model with equal weighing and elimination by aspects (referred to as EW/EBA) to assess the performance of the heuristic. The DDA heuristic model correctly predicted, on average, 91% of the time what foremen’s decisions were as to which decision task to choose to assign or re-assign to crew members. Whereas, the EW/EBA model correctly predicted, on average, 82% of the time, the foremen’s decisions. A computer program was also developed for DDA heuristic model to help foremen expedite the process of their decision-making.
Ph.D. in Civil Engineering, May 2016
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Title: AN OVERVIEW OF INSPECTION, REHABILITATION AND MONITORING METHODS USED FOR CHICAGO’S MOVABLE BRIDGES
Creator: Jalabert, Patrick C.
Date: 2012-07-09, 2012-07
Description: Chicago is the historical birthplace of movable bridges. Earlier than any other city in the world, this Midwestern city started developing...
Show moreChicago is the historical birthplace of movable bridges. Earlier than any other city in the world, this Midwestern city started developing solutions to obstacles facing river transportation through innovations in moveable bridge design. With over forty movable bridges built, today, the city faces a major rehabilitation issue with the deterioration of these bridges. The need to assess the condition, and plan for the future sustainability of these bridges, is vital to Chicago’s economy and to the safety of thousands of people who cross the Chicago River every day. As many other cities in the world face problems with their moveable bridges, any plan by pertinent agencies to rehabilitate bridges in Chicago is expected to set standards for the rehabilitation and maintenance of moveable bridges. An overview of guidelines set forth by the American Association of State Highway and Transportation Officials (AASHTO) and procedures and/or methods adopted by local authorities to inspect, repair and reconstruct moveable bridges in Chicago, are important steps in identifying the underlying issues related to the structural condition and degradation process of the many movable bridges still in operation in Chicago. The objective of this study is to review (1) current practices for movable bridge inspection, repair and rehabilitation; and (2) actual repairs projects, conducted under the authority of the Chicago Department of Transportation’s Division of Engineering, to identify and summarize the underlying structural and/or serviceability issues that are inherent to movable bridges in Chicago. Specifically, the study is expected to highlight a number of important issues that stem from age, repeated use and factors that have caused deterioration of Chicago’s movable bridges and the type of repairs that may be needed to guarantee the future safe operation of these bridges.
M.S. in Civil Engineering, July 2012
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Title: ORGANIZATIONAL CULTURE IN SCHEDULING UNITS AND ITS EFFECTS ON CONSTRUCTION DELAY
Creator: Nayak, Shruti
Date: 2011-07-14, 2011-07
Description: n/a
M.S. in Civil Engineering, July 2011

Title: AN INVESTIGATION INTO THE SIGNIFICANCE OF LENGTH-THICKNESS RATIO IN GUSSET PLATE BEHAVIOR IN BRIDGE TRUSSES
Creator: Olechno, Patrick
Date: 2012-07-12, 2012-07
Description: n/a
M.S. in Civil Engineering, July 2012

Title: Proposed hydraulic power development on East Canada Creek at Ingham Mills, New York
Creator: Buck, G. W., Deveney, W. J., Lettermann, G. D.
Date: 2009, 1910
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/proposedhydrauli00buck
Thesis (B.S.)--Armour Institute of Technology

Title: Proposed hydraulic development at Bow Fort Falls, Alberta, Canada
Creator: Wignall, W. J.
Date: 2009, 1920
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/proposedhydrauli00wign
Thesis (B.S.)--Armour Institute of Technology; Includes folded leaves in back pocket

Title: Proposed hydro-electric development at French's Mill, N.Y.
Creator: Cramer, August C., Wood, John, Lucas, John T.
Date: 2009, 1913
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/proposedhydroele00cram
Thesis (B.S.)--Armour Institute of Technology

Title: Proposed hydro-electrical development on the Columbia River at the Dalles, Oregon
Creator: Ehrlich, W. M, Roberts, W. F., Norton, J. C.
Date: 2009, 1914
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/proposedhydroele00ehrl
Thesis (B.S.)--Armour Institute of Technology; Includes folded leaves in back pocket ;...
Show morehttp://www.archive.org/details/proposedhydroele00ehrl
Thesis (B.S.)--Armour Institute of Technology; Includes folded leaves in back pocket ; Bibliography: leaf 25
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Title: SAFETY IMPACTS OF INTERSECTION RED LIGHT ENFORCEMENT IN CITY OF CHICAGO
Creator: Lee, Yongdoo
Date: 2011-07-19, 2011-07
Description: Red light running at highway intersections has been a major safety concern in the United States because it often results in a...
Show moreRed light running at highway intersections has been a major safety concern in the United States because it often results in a disproportionally higher percentage of injuries than other type of crashes. Statistics shows that about 45 percent of red-light running crashes would cause injuries compare to 30 percent associated with other type of crashes. Over the past decade, many city and county governments in the United States have begun to deploy red-light enforcement systems aimed to reduce red-light running related crashes for the benefits of safety improvements. In particular, the city of Chicago has implemented the red-light enforcement system since 2004. As of the end of 2010, more than 200 signalized intersections have been equipped with red light enforcement devices. This research attempts to evaluate the effectiveness of red light enforcement system deployed in Chicago in reducing types of target crashes including head-on, rear-end, angle, turning, sideswipe- same direction, and sideswipe- opposite direction by fatal, injury, and property damage only (PDO) crash severity category. Data on approximately 1,000 signalized intersections are collected for the analysis. These intersections are classified as three categories: untreated intersections without signal modernization and no red light enforcement, Type I treated intersections with both signal modernization and red light enforcement, and Type II treated intersections with signal modernization only. The Empirical Bayesian (EB) approach has been employed to quantify the crash reduction effects of red light enforcement that would avoid the regression-to-mean biases in the estimation. First, data on untreated intersections are used to calibrate safety performance functions for injury, PDO, and total crashes per intersection per year. The SPFs are then used to establish the EB-adjusted crash frequencies for Type I treated intersections for the before modernization period and Type II treated intersections for the before modernization period and red light enforcement period, respectively. The EB-adjusted crashes for Type I and Type II treated intersections for the after treatment period could be established by adjusting the before and after treatment period traffic volumes accordingly. The differences between EB-adjusted crashes and field observed crashes for Type I and Type II treated intersections for the after treatment period are the effect of signal modernization and combined effect of signal modernization and red light enforcement. The difference of the two effects thus represents the pure effect of red light enforcement. The effect of red light enforcement is further assessed by differentiating the Type I and Type II treated intersections according to number of through movement lanes and annual average daily traffic (AADT) range, respectively. For all target crashes including head-on, rear-end, angle, turning, sideswipe in the same direction, and sideswipe in the opposite direction combined, red light enforcement could on average reduce fatal crashes by 4 percent to 48 percent. Red light enforcement may increase injury crashes by 16 percent and decrease injury crashes by 8 percent. Red light enforcement may increase PDO crashes by one to 10 percent. The safety impacts of red light enforcement are separately assessed for different types of target crashes. For fatal crashes, red light enforcement may reduce fatal crashes by -1.4-1.2 percent for head-on crashes, 4-19 percent for rear-end crashes, 0.3-11 percent for angle crashes, -1.2-8 percent for turning crashes, 2-8.6 percent for sideswipe crashes in the same direction, and -0.4- 1.6 percent for sideswipe crashes in the opposite direction, respectively. Red light enforcement is generally ineffective in reducing PDO crashes. For all target crashes combined, the PDO crash increases could vary between 0.6 percent and 10.1 percent. For different types of target crashes, the highest PDO crash increases range from 0.2 percent for head-on crashes to 4.4 percent for rear-end crashes. Mixed results are obtained for red light enforcement on reducing injury crashes. For all target crashes combined, the injury crash could decrease as high as up to 8.2 percent and increase by approximately 16.3 percent. For different types of target crashes, the injury crashes may reduce by 4.7 percent for rear-end crashes to increase by 8 percent for rear-end crashes.
M.S. in Civil Engineering, July 2011
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Title: Renewal of the Milwaukee Avenue viaduct
Creator: Anderson, S. C, Beach, W. E
Date: 2009, 1912
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/renewalofmilwauk00ande
Thesis (B.S.)--Armour Institute of Technology, 1912 B.S. in Civil Engineering, 1912

Title: The relative strengths of spiral reinforced concrete columns
Creator: Aeberly, John J., Pitts, Guy C.
Date: 2009, 1913
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/relativestrength00aebe
Thesis (B.S.)--Armour Institute of Technology; Includes index Bibliography: leaf 41

Title: INFLUENCE OF THE FREQUENCY OF LOADING ON THE PIEZO-BARKHAUSEN RESPONSE OF STEEL FOR FATIGUE LIFE ASSESSMENT
Creator: Coulibaly, Jibril
Date: 2014, 2014-07
Description: Steel can fail prematurely under repeated cyclic loading below its proportional limit (or yielding point). Provided that a certain threshold...
Show moreSteel can fail prematurely under repeated cyclic loading below its proportional limit (or yielding point). Provided that a certain threshold in the loading magnitude, known as the endurance limit, is not exceeded, the material can sustain an infinite number of cycles (N 107). Recent interests in the piezo-magnetic behavior of ferromagnetic steels have been successfully providing reliable and physical indicators of fatigue properties of the material. Cyclic mechanical strain applied to ferromagnetic steels produce abrupt variations in the magnetization of the material referred to as piezo-Barkhausen pulses. Among the many variables influencing fatigue characteristics, the influence of the frequency of loading upon the piezo-Barkhausen response of steel is investigated herein. While the amplitude of the pulses varies, the cumulative piezo-Barkhausen indicator of damage is independent of the frequency and provides a specific measure of damage for a given level of applied strain and may be a way to evaluate service life. The distribution of the dominant frequency of the observed pulses also permits one to separate the stable states of loading from those leading to fatigue failure. Further observations on the piezo-Barkhausen signals particularities have also been made to provide a greater insight on the micro mechanisms of fatigue and damage accumulation in steel.
M.S. in Civil Engineering, July 2014
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Title: LAND USE EFFECTS ON WATER QUALITY: BUILDING A FRAMEWORK FOR CHICAGO RIVER WATERSHED
Creator: Mahdi, Naila Ghidey Ismail
Date: 2012-05-09, 2012-05
Description: The purpose of this study is to introduce a framework that enables a holistic watershed approach that models the dynamics of water quality and...
Show moreThe purpose of this study is to introduce a framework that enables a holistic watershed approach that models the dynamics of water quality and landuse in a highly urbanized watershed. The landuse-water quality relationship is a complex relationship and has not been adequately addressed for highly urbanized watersheds. Factors such as inadequate urban planning, increase of impervious areas and dynamics of population growth are some of the reasons for the complex relationship. Also point sources are always easy to be identified and controlled unlike nonpoint sources such as urban storm runoff. Both quantities and transport pathways of pollutant inputs are impacted by land use in the watershed. So, examining the factors that govern the relationship between different land uses and water quality within a watershed can give insights and important information about existing and potential sources of contamination. The two backbone concepts in this study are the holistic watershed perspective and the role of historical data records as part of assessment, modeling and integration tools of the watershed framework. Analysis of the records will explain watershed conditions identifying the major problem areas and justify the modeling and post analysis procedures. Data sources are often important but data availability, heterogeneity and conformity are the main challenges in integrating these sources. This research presents an approach to integrate the watershed data in a single repository and methodologies for analyzing and assessing the watershed using data warehouse and data mining technologies. A multi-dimensional model that supports complex querying of watershed data and discovery of trends and patterns in data by incorporating 40 years worth of watershed data from different source agencies in a central repository is introduced. Also, the discipline of data driven modeling was introduced in this thesis using the developed central repository. Several regression and classification algorithms were presented and assessed for their appropriateness for predicting total nitrates using few watershed attributes. The results show acceptable prediction accuracy. Five years of water quality simulation using the multi-purpose environmental analysis system BASINS coupled with the comprehensive, conceptual, and continuous simulation watershed scale model HSPF resulted in export coefficients for level (III), detailed land use for the Chicago River watershed. The water quality simulation approach utilized in this research to generate the coefficients constitutes a new contribution to the Chicago River watershed and other highly urbanized watersheds. The continuous calibrated and validated model can be used in the investigation and analysis of different scenarios and possible future conditions, thus providing a planning tool for regulatory environmental agencies. The data driven models developed can be used as operation tool to maintain the water quality parameters especially if TMDL and WQS are developed for Chicago River Watershed. So the framework proposed for this study can be considered robust with the proposed integration, planning and operating techniques and tools. Furthermore, an optimization tool is introduced in the future work section.
Ph.D. in Environmental Engineering, May 2012
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Title: SAFETY PERFORMANCE EVALUATION OF INTERSECTION TRAFFIC AND SAFETY ASSETS: METHODOLOGY AND APPLICATION
Creator: Kim, Han Gyol
Date: 2012-11-27, 2012-12
Description: Due to the large number of intersections in transportation networks, the complexity of potential conflicting traffic movements, and the wide...
Show moreDue to the large number of intersections in transportation networks, the complexity of potential conflicting traffic movements, and the wide variety of geometric and operational features at these locations, the safety at roadway intersections is of significant interest. A variety of crash types occur at intersections every year including head-on, sideswipe-same, sideswipe-opposite, fixed object, rear-end, fixed object, turning, and angle crashes. While a total of crashes at intersections may not reveal a site deficiency, prevalence of a specific crash type may reveal otherwise undetected deficiencies. To analyze the interrelation between deficiencies and crashes, a risk-based methodology is for computing a safety index that assesses impacts of safety hardware conditions on vehicle crashes. It incorporates a disaggregated risk-based approach for computing the safety index that assesses the impacts of intersection safety hardware such as signs, signals, lighting, and pavement markings on vehicle crashes. With safety indices estimated before and after implementation of an intersection safety hardware project, the annual potential for safety improvements (PSI) could be computed. Potential hazards, which are assessed by measuring risk in relation to road features that may lead to future crashes, so that remedial treatments may be implemented before crashes happen. A computational study is conducted for methodology application and validation to remove or change the features which contributed to those past crashes using 7-year data on 93 signalized intersections which have been equipped with red-light running enforcement devices in Chicago, Illinois. The results are compared with Empirical xii Bayesian Estimates via the statistical tests in order to validate the proposed methodology. Finally, it discusses future directions for continuing refinements of the proposed riskbased methodology. The proposed methodology could be adopted by state and large-scale local transportation agencies for intersection safety hardware project evaluation.
M.S. in Civil Engineering, December 2012
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Title: The practical aspect of the slope deflection method and its application to the design of the Roosevelt Road Viaduct
Creator: Grodsky, Morris
Date: 2009, 1920
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/practicalaspecto00grod
Thesis (B.S.)--Armour Institute of Technology;Includes folded leaves in back pocket...
Show morehttp://www.archive.org/details/practicalaspecto00grod
Thesis (B.S.)--Armour Institute of Technology;Includes folded leaves in back pocket Bibliography: leaves 118-120
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Title: BARRIERS FACED BY PARTIES TO A PUBLIC PRIVATE PARTNERSHIP (PPP) IN THE PRE-AGREEMENT PHASE
Creator: Thakkar, Rushit
Date: 2014, 2014-07
Description: Several infrastructure developments worldwide have been completed by public private partnerships (PPPs) with diverse results. PPP projects...
Show moreSeveral infrastructure developments worldwide have been completed by public private partnerships (PPPs) with diverse results. PPP projects enco unter a variety of barriers in the pre-agreement phase that may be serious enough for the cancellation of the project. This paper uses the literature to identify the most common PPP barriers, These barri ers are classified into six categories: (1) legal baniers (2) political baniers (3) social barriers (4) financial baniers (5) economic baniers (6) coordination barriers. The extent of the impact of these barriers was obtained by conducting a structured questionnaire survey that was administered to public owners in India and private consortia. The relative significance of the criteria within each barrier was statistically analyzed for internal consistency and reliability. The differences were evaluated by using the Mann Whitney U test between public owners and private consortia. The findings indicate that public owners and private consortia agree on the impact of all six aggregate barriers to PPP. Social barriers have the least impact, while financi al barriers have the highest impact on PPPs. Public owners and private consortia had statistic ally different views in only five of the 41 barriers considered in this study. Keywords. Public Private Partnership (PPP ), Public owners, Private consortia, Preagreement phase, Legal barriers , Political barriers, Social baniers, Financial barriers, Economic barriers, Coordination barriers , Aggregate PPP barrie rs, Questionnaire survey, Statistical analysis, Mann-Whitney U tests.
M.S. in Civil Engineering, July 2014
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