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Title: Comparative tests of a boucherot induction motor
Creator: Micheal, J. C, Noren, H. E
Date: 2009, 1912
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/comparativetests00mich
Thesis (B.S.)--Armour Institute of Technology; On cover: Tests of a boucherot induction...
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Thesis (B.S.)--Armour Institute of Technology; On cover: Tests of a boucherot induction motor
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Title: A comparative life test of five types of incandescent lamps
Creator: Lindsay, Curtis Morgan
Date: 2009, 1909
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/comparativelifet00lind
Thesis (B.S.)--Armour Institute of Technology, 1909 Bibliography: leaf ii B.S. in...
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Thesis (B.S.)--Armour Institute of Technology, 1909 Bibliography: leaf ii B.S. in Electrical Engineering, 1909
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Title: Comparative test of centrifugal blowers
Creator: Griffiths, Francis H, Cummins, G. Fred
Date: 2009, 1911
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/comparativetesto00grif
Thesis (B.S.)--Armour Institute of Technology, 1911 B.S. in Mechanical Engineering, 1911

Title: A comparative test of the mercury arc and the Murphy Electricity Rectifiers
Creator: Heitner, Walter O., Lohse, Alfred C, Mcguire, William P
Date: 2009, 1911
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/comparativetesto00heit
Thesis (B.S.)--Armour Institute of Technology, 1911 Bibliography: leaf 37 B.S. in...
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Thesis (B.S.)--Armour Institute of Technology, 1911 Bibliography: leaf 37 B.S. in Electrical Engineering
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Title: A comparative test of integrating wattmeters
Creator: Crane, Edwin B
Date: 2009, 1909
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/comparativetesto00cran
Thesis (B.S.)--Armour Institute of Technology, B.S. in Electrical engineering, 1909

Title: Comparative tests on small steam pumps
Creator: Lewis, R. L., Monahan, J. E.
Date: 2009, 1908
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/comparativetests00lewi
Thesis (B.S.)--Armour Institute of Technology

Title: Comparative tests of small laminated and solid spruce beams for aeroplane construction
Creator: James, Sydney V
Date: 2009, 1911
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/comparativetests00jame
Thesis (B.S.)--Armour Institute of Technology; Bibliography: leaf 19

Title: Comparative test of cylinder lubricating oils
Creator: Hoffman, C. B., Jr, Hooper, B. G.
Date: 2009, 1907
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/comparativetesto00hoff
Thesis (B.S.)--Armour Institute of Technology

Title: Comparison of the various methods of determining the commercial efficiency of direct current motors & generators
Creator: Thatcher, W. C., Whitmore, R., Neville, W. J.
Date: 2009, 1910
Publisher: Armour Institute of Technology
Description: http://www.archive.org/details/comparisonofvari00that
Thesis (B.S.)--Armour Institute of Technology; Bibliography : leaves: 105-107

Title: THE IMPACT OF WORK UNIT LEVEL PERCEPTIONS OF CAREER DEVELOPMENT OPPORTUNITIES, COWORKER SUPPORT, ROLE CLARITY, AND WORKLOAD ON EMPLOYEE ENGAGEMENT
Creator: Cama, Mike
Date: 2018, 2018-05
Description: The Job Demands-Resources (JD-R) model has been used to explain influencing factors of engagement and burnout, with resources traditionally...
Show moreThe Job Demands-Resources (JD-R) model has been used to explain influencing factors of engagement and burnout, with resources traditionally having a relationship with engagement, and demands having a relationship with burnout. Recent research has suggested that demands may serve as moderators in the resources-engagement relationship based on whether the demands are perceived as challenges or hindrances. Additionally, most engagement research that focuses on antecedents of engagement is at the individual level yet that data is often aggregated at a higher level (e.g. business unit) when consequences of engagement (such as financial metrics) are considered. Furthermore, managers often receive aggregated scores for their work units and almost never receive individual level data to protect confidentiality and encourage honest responses. Therefore, this study seek to investigate how job resources (career development opportunities, role-clarity, and coworker support), aggregated at work unit level impact engagement and if the work unit level perception of workload moderates this relationship. Finally, it is expected that engagement will also have a strong positive relationship with intent to stay at the work unit level.
Ph.D. in Psychology, May 2018
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Title: GROUP-LEVEL META-ANALYSES: AN EXAMINATION OF THE EFFECTS OF CHARACTERISTICS OF GROUP-LEVEL STUDIES ON THE ACCURACY OF PARAMETER ESTIMATES
Creator: Burke, Maura Irene
Date: 2018, 2018-05
Description: This dissertation was an empirical investigation of how statistical artifacts and characteristics of group-level studies affect meta-analytic...
Show moreThis dissertation was an empirical investigation of how statistical artifacts and characteristics of group-level studies affect meta-analytic parameter estimates in group-level meta-analyses. Simulation procedures were employed to examine how the proportion of available group-level reliability information, the number of studies in a meta-analysis, and the type of group-level reliability estimate affect the accuracy of estimates of the mean and variance of rho when these population values are known. Archival data was used to identify known population parameter values and create group-level meta-analytic conditions commonly seen in the organizational sciences literature. This study has resulted in the following conclusions. When proportions of sample-based reliability are reduced in availability, meta-analyses are relatively accurate in estimating the magnitude of mean rho. As more studies enter meta-analyses, standard errors of mean rho are substantially reduced and confidence bands become increasingly smaller in width and this pattern of results holds regardless of the group-level reliability estimate used to individually correct correlations. Further, when meta-analyses involved the use of completely assumed values, the degree of accuracy in mirroring known population parameters was dependent on the degree to which the group-level reliability value approximates that of the population. Finally, both ICC(2) values and rCG group-based reliability estimates produced relatively accurate meta-analytic findings relative to their respective known population parameter values. Advantages and limitations to the use of each type of reliability estimate are discussed in detail in the manuscript.
Ph.D. in Psychology, May 2018
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Title: INDIVIDUAL-BASED RISK MODELS FOR CRIME PREVENTION AND MEDICAL PROGNOSIS
Creator: Haro Alonso, David
Date: 2018, 2018-05
Description: Parallel trends are currently taking place in the fields of crime and medicine, in which the focus is shifting from a reactive stance to a...
Show moreParallel trends are currently taking place in the fields of crime and medicine, in which the focus is shifting from a reactive stance to a proactive one. Both fields have traditionally been reactive, with police responding to 911 calls after a crime has occurred, and patients seeking medical care after symptoms have already appeared. In the field of crime, social-services programs, law-enforcement agencies, sociologists, and criminologists are studying ways to prevent crime, instead of merely reacting to it. A similar trend, known as preventive medicine, is concerned with addressing the causes of disease and not just focusing on treatment of disease that has already emerged. If crime and disease are to be prevented, it is important to understand the early warning signs of risk, to anticipate and treat problems before they occur. This can be accomplished via mathematical risk models that can evaluate an individual’s risk based on leading indicators. In this thesis I develop such models for two real-world problems in crime prevention and one in preventive medicine. A major focus of this thesis is to emphasize the accuracy of the ranking of risk for situations in which the allocation of resources must be prioritized to the highest-risk individuals. This is especially true in a social-services program designed to reduce crime, where the number of available social workers may be limited. In the first part of the thesis, I describe a novel method of risk modeling based on the probabilistic framework of a conditional random field, in which a machine-learning regressor is embedded. This is applicable in situations where an individual’s risk of an adverse outcome is partly dependent on the risk levels of others. We have applied this technique to develop a model that assesses an individual’s near-term risk of becoming a victim or arrestee in a shooting or homicide in Chicago. The model was developed as an informational tool for a pilot crime-prevention program that aims to offer social services to at-risk persons with the aim of providing opportunities for life changes that may reduce their crime risk. In the second part of the thesis, I describe a new model with a similar goal—to identify individuals at risk of involvement in crime—but aims to provide information for use in smaller cities that have a more typical array of crime concerns than Chicago. We developed the model as part of a current partnership with the Elgin Police Department, where a social-services intervention program under development will incorporate our model in identifying persons who might benefit from assistance. In the last part of the thesis, I describe a risk assessment algorithm for the medical field, which we developed in partnership with Cedars-Sinai Medical Center, Los Angeles, CA. In this work, we sought to demonstrate to the cardiology field (and the broader medical field) that machine learning can provide a better framework for risk stratification in medicine than traditional statistical methods such as logistic regression, which are the norm in that field. We also showed that, contrary to concerns by medical practitioners, machine learning can provide a solution that is easy to interpret.
Ph.D. in Electrical Engineering, May 2018
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Title: COMPUTATIONAL STUDIES OF HEAT TRANSFER IN TURBULENT WAVY CHANNEL FLOWS
Creator: Dzubur, Amar
Date: 2018, 2018-05
Description: Heat transfer is studied in fully-developed turbulent flows through channels with various geometries using Direct Numerical Simulations (DNS)....
Show moreHeat transfer is studied in fully-developed turbulent flows through channels with various geometries using Direct Numerical Simulations (DNS). Channels where a sinusoidal wave is mapped along the wall in either the streamwise direction or spanwise direction are studied, and comparisons to a simple channel with flat walls (rectangular channel) are provided. The fluid flow velocities fi elds, and pressure fi elds are analyzed along with the vorticity generated in the flow, and are utilized in tandem with the Nusselt number calculated along the heat transfer boundaries, to derive a clearer description of the heat transfer performance of the various geometries. The geometries that have a sinusoidal wave mapped along the spanwise direction and not along the streamwise direction showed the poorest heat transfer performance, as exhibited by the lowest average Nusselt number. The performance of two channels, with an in-phase and out of phase sinusoidal wave mapped along the streamwise direction exhibited heat transfer performance signifi cantly higher than that shown by the rectangular channel, which served as baseline. The heat transfer differences can be largely attributed to the vorticity generation and superior fluid mixing that is generated by the periodic streamwise mapped sinusoid. Streamwise sinusoidal channels exhibit Nusselt numbers that are more than three times greater than the spanwise mapped sinusoid, and almost three times greater than that of the rectangular channel. It is shown that the difference among an in-phase and out of phase wave mapping exists, but is found to be minimal. Further exploration regarding potential geometries with various phase shifts, non-rounded corners, and longer simulation times would be beneficial.
M.S. in Mechanical and Aerospace Engineering, May 2018
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Title: UNEMPLOYMENT AND SUICIDE IN THE FRAMEWORK OF THE INTERPERSONAL THEORY OF SUICIDE
Creator: Roubal, Eren A.
Date: 2018, 2018-05
Description: Becoming unemployed is typically considered a risk factor for suicidal ideation (SI) and behavior. This study aimed to examine how...
Show moreBecoming unemployed is typically considered a risk factor for suicidal ideation (SI) and behavior. This study aimed to examine how unemployment confers risk for suicidal ideation, positing that Perceived Burdensomeness (PB) and Thwarted Belongingness (TB) function as mediators between the length of an individual’s unemployment and their level of SI. In terms of the Interpersonal Theory of Suicide, individuals with higher levels of these variables are hypothesized to have an increased desire to be dead. Other issues related to unemployment and suicidal thinking were examined including whether the preceding variables had a curvilinear relationship to length of unemployment, whether income loss was a predictor of suicidal thinking and whether veterans of the armed forces experienced higher levels of the preceding variables than non-veterans. PB was found to function as a mediator, but TB did not. There was evidence of a curvilinear relationship, with individuals recently and long-term unemployed reporting lower SI than those unemployed for a moderate duration. Income loss was unrelated to both PB and SI, and veterans were found to exhibit higher PB and SI than non-veterans, but similar levels of PB. These findings begin to shed light on which individuals who lose their job are at greater risk for suicidal thinking; clinical implications for risk assessment are also discussed.
Ph.D. in Psychology, May 2018
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Title: A MICROSCOPICALLY INTACT GASTROINTESTINAL ANASTOMOSIS: METHODS OF CONSTRUCTION AND MEANS OF ASSESSMENT
Creator: Hedberg, H. Mason
Date: 2018, 2018-05
Description: Recent research reveals that healing of anastamotic wounds can be impaired by the adherence of gut bacteria to exposed collagen. Sutures and...
Show moreRecent research reveals that healing of anastamotic wounds can be impaired by the adherence of gut bacteria to exposed collagen. Sutures and staples create a network of microscopic channels along the inverted cut bowel edge which may promote bacteria-mediated anastomotic breakdown. Techniques that preserve microscopic tissue integrity may be key to preventing clinical anastomotic leaks. Our objective was to develop a sensitive assay to determine anastomotic integrity across various techniques including single-layer hand-sewn, stapled, adhesive and bipolar. All anastomoses were performed in an end-to- end fashion between segments of porcine small intestine; intact bowel served as a control. Prototypes were designed to facilitate technically consistent bipolar and adhesive anastomoses between everted bowel ends. The anastomotic lumen was placed in series with a low-flow, low-pressure circuit of concentrated fluorescein solution. Normal saline filled a chamber surrounding the anastomosis; extraluminal solution was periodically sampled for analysis. Fluorescein concentration was quantified with spectrophotometry. Intact controls and adhesive anastomoses showed minimal increase in fluorescein concentration. Over fifteen minutes the adhesive anastomoses leaked less than bipolar (p=0.05), stapled (p<0.01), and hand-sewn (p=0.12) anastamoses. Sewn anastomoses had the highest leak variance, accounting for the lack of significance. Adhesive anastomoses improved microscopic integrity to fluorescein compared to all other techniques. The immediate next phase will include revising bipolar and adhesive prototypes, improving statistical power, and using a bacterial culture in lieu of fluorescein. Focusing on techniques that produce the most biologically intact anastomoses has the potential to prevent clinical anastomotic leaks.
M.S. in Biomedical Engineering, May 2018
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