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Title: THE RELATION BETWEEN PSYCHOLOGICAL DISTRESS, TRAIT ANXIETY, AND MATERNAL BEHAVIORS DURING SONOGRAM PROCEDURES
Creator: Butler, Kristina
Date: 2016, 2016-12
Description: The aim of this study was to examine whether psychological distress and trait anxiety were related to positive (i.e., smiling and surprised)...
Show moreThe aim of this study was to examine whether psychological distress and trait anxiety were related to positive (i.e., smiling and surprised) and negative (i.e., worried and sad) facial expressions and gaze towards the fetus during routine ultrasound procedures in the second trimester of pregnancy. Assessment of mood symptoms during the second trimester of pregnancy is important because it is when depression begins to have a negative impact biochemically, which may lead to adverse postnatal outcomes. Participants included a diverse group of 70 women in their second trimester of pregnancy. The Depression Anxiety Stress Scales (DASS-21) and the State Trait Anxiety Inventory (STAI), Trait Form were used to assess psychological distress and trait anxiety, respectively. Videos of participants’ faces during their ultrasound examination were coded to assess facial expressions and gaze towards the fetus. Results of regression analyses indicated that higher levels of distress and trait anxiety were related to fewer smiles. Higher levels of distress also were related to longer durations of sad expressions. There was not a relation between duration of gaze towards the fetus and levels of distress and trait anxiety. These findings suggest that women’s negative facial expressions during routine sonograms may show that they are feeling distressed, and could indicate the need for more formal screening for depression and anxiety symptoms.
M.S. in Psychology, December 2016
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Title: Patterns of Internalizing and Externalizing Symptoms in Children with Autism Spectrum Disorders: A Multi-Informant Approach
Creator: Gretencord, Ashley
Date: 2011-05-25, 2011-05
Description: The presence of externalizing symptoms in children with Autism Spectrum Disorders (ASDs) is a common occurrence. Additionally, recent research...
Show moreThe presence of externalizing symptoms in children with Autism Spectrum Disorders (ASDs) is a common occurrence. Additionally, recent research has established high rates of internalizing symptoms within this population. This study examined the frequencies of internalizing and externalizing symptoms according to parent, teacher, and self-report of children and adolescents with an ASD. The agreement between sources on both types of symptoms was examined, as well as the relationship between agreement rates and type of symptom, age, and diagnosis (Autism, Asperger’s Disorder, Pervasive Developmental Disorder-Not Otherwise Specified). Participants included 77 children and adolescents (8-18 years) who had been diagnosed with an ASD, their parents, and teachers. Parent, teacher, and self-report were measured using the internalizing and externalizing composites of the Behavior Assessment System for Children, 2nd edition (BASC-2; Reynolds & Kamphaus, 2004). Results indicated high rates of both types of symptoms endorsed by all three sources. However, parents reported significantly more symptoms than their children, with symptom endorsement by teachers in between these. Although agreement rates were low across all sources, there was higher agreement for externalizing symptoms compared to internalizing symptoms. Additionally, age was found to impact agreement rates: adolescents’ selfreport of symptoms significantly correlated with parents for both types of symptoms and with teachers for externalizing symptoms, while children’s self-report of symptoms did not significantly correlate with the other sources for either type of symptom. Contrary to hypotheses, age and diagnosis were not related to the rate of self-report. Implications of the findings are discussed.
M.S. in Psychology, May 2011
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Title: THE IMPACT OF MECHANISM OF INJURY ON POSTCONCUSSIVE SYMPTOMS
Creator: Aylward, Stephanie A
Date: 2017, 2017-05
Description: The complex factors associated with assessment and treatment of pediatric concussion are still not well understood. Currently, the majority of...
Show moreThe complex factors associated with assessment and treatment of pediatric concussion are still not well understood. Currently, the majority of pediatric concussion research focuses on sport-related concussions (SRC), despite the large number of youth who sustain non-sport-related concussions (NSRC). Because participation in sports represents an important pre- and post-injury factor that can affect postconcussive outcomes for youth, the aim of this study was to examine differences in youth diagnosed with SRC compared to NSRC (e.g., fall, gym injury, motor vehicle accident, accidental blunt trauma, assault). Participants included 298 children/adolescents (8- to18-years) who sustained a concussion (212 = SRC). Neuropsychological measures and questionnaires were administered to assess working memory (Auditory Consonant Trigram Test; ACT), memory (Immediate Post-Concussion Assessment and Cognitive Testing; ImPACT), attention (Conners’ Continuous Performance Test, 2nd Ed.; CPT-II), reading and math fluency (Woodcock-Johnson, 3rd and 4th Ed.; WJ-III; WJ-IV), and parent- and self-report of executive function (Behavior Rating of Executive Function; BRIEF) and internalizing symptoms (Behavior Assessment System for Children, 2nd Ed.; BASC-2). A MANCOVA (days since injury as covariate) was conducted to examine differences between youth with SRC compared to youth with NSRC. As predicted, youth with NSRC performed significantly worse than youth with SRC on the ACT, ImPACT Memory, and WJ math fluency. Contrary to hypotheses, there were no differences between groups on the CPTII, WJ reading fluency, BRIEF, or BASC-2. Results of this study provide clinically relevant information regarding how mechanism of injury impacts postconcussive recovery in youth.
M.S. in Psychology, May 2017
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Title: HIGH PRESSURE PROCESSING CONDITIONS FOR INACTIVATION OF HUMAN NOROVIRUS SURROGATE IN OYSTERS
Creator: Agarwal, Sagar
Date: 2015, 2015-07
Description: Noroviruses are the leading cause of acute nonbacterial gastroenteritis in humans. Bivalve mollusks bio-accumulate norovirus as they feed....
Show moreNoroviruses are the leading cause of acute nonbacterial gastroenteritis in humans. Bivalve mollusks bio-accumulate norovirus as they feed. High pressure processing (HPP), a non-thermal processing technology, can inactivate microorganisms in foods while preserving flavor, appearance, nutritional value, and extending shelf-life. In the present study, we have systematically investigated the effect of parameters such as temperature, salinity and product composition on the efficacy of HPP for inactivation of human norovirus surrogate. For temperature analysis MNV-1 suspended in aqueous media, oyster homogenate, and bio-accumulated in whole oysters were treated with pressures varying from 200-500 MPa at 4, 10, and 20oC with a hold time of 1 minute. In media, a 4-log10 reduction was observed upon treatment at 300 MPa for 1 minute at 4oC, whereas pressures of 400 and 500 MPa were required for a comparable reduction at initial processing temperatures of 10 and 20oC. Colder temperature promoted higher reduction in virus titer at a given pressure. Addition of 1, 2 and 3% (w/v) sea salt to aqueous media provided significant baroprotective effect at colder temperatures. While pressure of 300 MPa for 1 min at 4oC was sufficient to achieve 3-log10 reduction for MNV-1 suspended in 1% (w/v) sea salt media, the same conditions resulted in only 1.4-log10 reduction for MNV-1 suspended in 3% (w/v) sea salt media. However increasing processing temperature the minimized the baroprotective effects. Similar results were observed for the effect of food matrix on virus survival, with significant baroprotective effect at colder temperatures and a minimal impact of matrix on increasing processing temperature. For initial processing temperature of 4oC a 300 MPa treatment with a hold time of 1 min resulted in a 4-log10 reduction for MNV-1 suspended in aqueous media, 3.35-log10 reduction in oyster homogenate, and <1-log10 reduction in whole oysters. Whereas at higher initial processing temperatures of 10 and 20oC the difference in reduction between matrices was insignificant. A comparison of temperature v/s salinity and temperature v/s composition revealed that effects of temperature far outweighed the impact of product properties (salinity and composition).Whole oysters seeded with MNV-1 treated at 350 MPa for 1 min at 4oC was found to have a 4-log10 reduction, while MNV-1 suspended in aqueous media at 20oC on similar treatment had a 0.5-log10 reduction. Similarly MNV-1 suspended in aqueous media with 3% salt when treated with 400 MPa for 1 min at 4oC resulted in a 5-log10 reduction, whereas MNV-1 suspended in aqueous media at 20oC on similar treatment had a 1.9-log10 reduction. Oyster processors should use refrigerated temperature to achieve higher reduction in virus titer at lower pressures.
M.S. in Food Safety and Technology, July 2015
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Title: PEM Fuel Cell Power Generation System (Fall 1999) IPRO 016
Creator: Kim, Jeom-soo, Solesi, Seun, Hadley, Tim, Kyriakides, Elias, Kelly, Peter, Durodola, Mobolaji, Hadley, Alexis, Schafer, Jochen, Khan, Junaid, Buck, Richard
Date: 1999, 1999-12
Description: - Demonstrate the application of solar energy in a high tech integrated (hybrid) system - Create interest and initiate contact with the...
Show more- Demonstrate the application of solar energy in a high tech integrated (hybrid) system - Create interest and initiate contact with the industry - Initiate contacts with the local community and search for applications of this technology in future commun
Sponsorship: Com-Ed, Solarex, Alcad, IIT
Project Plan for IPRO 016: PEM Fuel Cell Power Generation System for the Fall 1999 semester
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Title: Designing a Three-Dimensional "Mesh" to Improve the Quality of Simulations (Fall 2001) IPRO 307
Creator: Saric, Marin, Griffin, Paul, Sharifi, Hamed, Wei, Yeow Tsa, Verma, Sameer, Xiaofeng, Zhou
Date: 2001, 2001-12
Description: This project focuses on building a three-dimensional high quality "mesh" for scientific simulations. Since the quality of the mesh affects the...
Show moreThis project focuses on building a three-dimensional high quality "mesh" for scientific simulations. Since the quality of the mesh affects the accuracy and convergence of numerical systems, having a high quality mesh is one of the most important requirements for conducting numerical simulations. Currently, most of the software packages cannot theoretically guarantee the quality of the mesh generated. The purpose of this project is to implement a selected set of algorithms that have a theoretical quality guarantee in order to study their practical performance compared with heuristics-based methods. We expect that peer researchers in various fields could use the software developed to conduct scientific simulations. In addition, the developed software will also provide the building block for later numerical simulation systems and computer graphics related systems. The major activities of the project are to acquire interdisciplinary knowledge related to computer science and other engineering departments. This project provides students from engineering and other fields with knowledge of computer science, including programming, algorithm design and analysis; and provides students from computer science with knowledge of scientific simulations and how to apply their knowledge to solve practical engineering problems.
Sponsorship: IIT Collaboratory for Interprofessional Studies
Project Plan for IPRO 307: Designing a Three-Dimensional "Mesh" to Improve the Quality of Simulations for the Fall 2001 Semester
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Title: Adoption and Implementation of Diabetes Electronic Support Center at Mount Sinai Hospital, Summer 2011, IPRO 345: IPRO final presentation
Creator: Kos, Carolyn, Valio, Nicole, Michael, Hazel, Chinzorig, Unubold, Johnson, Kendra
Date: 2011-06-17, 2011-07
Description: The purpose of IPRO 345 is to improve and mobilize the data and remote health care system for Mount Sinai Hospital. Specifically, this project...
Show moreThe purpose of IPRO 345 is to improve and mobilize the data and remote health care system for Mount Sinai Hospital. Specifically, this project aims to create a data support to aid diabetic patients within 500 meters of the hospital in order to decrease cost of operation and time and increase the quality of care. We will develop the groundwork for future IPRO 345 teams that will eventually implement the new data collection program.
Sponsorship: SolarWindUSA
Design+Prototype+Test an Integrated Roof-Top Photovoltaic Solar System Design, Summer 2011, IPRO 345
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Title: Adoption and Implementation of Diabetes Electronic Support Center at Mount Sinai Hospital, Summer 2011, IPRO 345: IPRO final report
Creator: Kos, Carolyn, Valio, Nicole, Michael, Hazel, Chinzorig, Unubold, Johnson, Kendra
Date: 2011-06-17, 2011-07
Description: The purpose of IPRO 345 is to improve and mobilize the data and remote health care system for Mount Sinai Hospital. Specifically, this project...
Show moreThe purpose of IPRO 345 is to improve and mobilize the data and remote health care system for Mount Sinai Hospital. Specifically, this project aims to create a data support to aid diabetic patients within 500 meters of the hospital in order to decrease cost of operation and time and increase the quality of care. We will develop the groundwork for future IPRO 345 teams that will eventually implement the new data collection program.
Sponsorship: SolarWindUSA
Design+Prototype+Test an Integrated Roof-Top Photovoltaic Solar System Design, Summer 2011, IPRO 345
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Title: Adoption and Implementation of Diabetes Electronic Support Center at Mount Sinai Hospital, Summer 2011, IPRO 345: IPRO letter of consent
Creator: Kos, Carolyn, Valio, Nicole, Michael, Hazel, Chinzorig, Unubold, Johnson, Kendra
Date: 2011-06-17, 2011-07
Description: The purpose of IPRO 345 is to improve and mobilize the data and remote health care system for Mount Sinai Hospital. Specifically, this project...
Show moreThe purpose of IPRO 345 is to improve and mobilize the data and remote health care system for Mount Sinai Hospital. Specifically, this project aims to create a data support to aid diabetic patients within 500 meters of the hospital in order to decrease cost of operation and time and increase the quality of care. We will develop the groundwork for future IPRO 345 teams that will eventually implement the new data collection program.
Sponsorship: SolarWindUSA
Design+Prototype+Test an Integrated Roof-Top Photovoltaic Solar System Design, Summer 2011, IPRO 345
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Title: HOSPITAL FACILITY DESIGN: A GUIDE TO SPACE PLANNING FOR A NEW GENERAL HOSPITAL IN VIETNAM
Creator: Pham, Tuan Anh
Date: 2015, 2015-07
Description: Vietnam is a relatively small and populous developing country. Over the past several decades, the change in the country’s market economy and...
Show moreVietnam is a relatively small and populous developing country. Over the past several decades, the change in the country’s market economy and the population growth have greatly affected the lives, activities, and the demands for heath care as well as impacted the healthcare system. Since 1994, the time when the United States abolished the trade embargo against Vietnam, the economic development and the growth of the healthcare system in the country have been extraordinary. Even though substantial investment has been obtained from the Vietnamese government, limitations remain in the physical facilities in the healthcare system as well as in the facility design. Designing a new general hospital is a complicated process and requires a lot of attention and knowledge from a design team. Generally, the design process consists of two phases: a planning phase and a design phase. The planning phase is extremely important and will decide the success of the general hospital. G D Kunders, an Indian professional hospital administrator and a healthcare facility planner, has stated “Failing to plan is planning to fail” (Kunders 2004, 61). The main objective of this dissertation, “HOSPITAL FACILITY DESIGN: A GUIDE TO SPACE PLANNING FOR A NEW GENERAL HOSPITAL IN VIETNAM,” is to produce a guide that will be a reference source for the Vietnamese government to improve the current standard for hospital design. As a reference source, the proposed guide can be used as a tool to assist Vietnamese architects and other professionals in healthcare design areas in improving the quality of the hospital planning and design in Vietnam. This dissertation also aims to be a teaching reference source for architecture educators to use in their instruction at universities in Vietnam and a learning resource to help architecture students understand requirements for spaces in a general hospital as well as how a general hospital functions so they can better plan and design it. The proposed guide is set in an arrangement that can help educators and students without strong backgrounds in hospital design to easily understand how to plan a new general hospital. The research methods used in this dissertation are (i) document reviews, (ii) qualitative research based on Post-occupancy Evaluation (POE), and (iii) comparative analyses. The findings are used to create a guide to space planning for a new general hospital to use to improve the current Vietnamese standards, TCVN 4470: 2012, General Hospital - Design Standard, in hospital planning and design for Vietnam. This dissertation consists of eight chapters, which include Chapter 1 - Introduction, Chapter 2 - Literature Review, Chapter 3 - Problem Statement, Chapter 4 - Methodology, Chapter 5 - Data Analysis, Chapter 6 - Findings, Chapter 7 - A Guide to Space Planning for a New General Hospital in Vietnam, and Chapter 8 - Conclusion.
Ph.D. in Architecture, July 2015
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Title: OPTIMIZING THE PERFORMANCE OF BUILDING ENVELOPE FOR ENERGY EFFICIENCY CONSIDERING ADAPTIVE THERMAL COMFORT: A CASE OF TROPICAL CLIMATE IN DHAKA
Creator: Rahman, Anisur
Date: 2014, 2014-05
Description: As demand for fossil fuel increases and availability decreases, energy consumption reduction in building becomes critical component of a city...
Show moreAs demand for fossil fuel increases and availability decreases, energy consumption reduction in building becomes critical component of a city’s comprehensive energy strategy. The performance of a building’s envelope is pivotal to the energy consumption of office buildings and it must mediate between external climate conditions and people’s comfort. By optimizing a buildings envelope, the heat gain or loss of a building can be manipulated and it can reduce energy consumption. In Dhaka, a widespread desire for office building with glazing areas far greater than the percentage required achieving comfortable thermal and light levels, with high solar transmittance, is directly at odds with the need to curb cooling-related energy use. When addressing energy efficiency in a building, it is necessary to account for local climate first and foremost to define the thermal comfort condition. This determines the energy demand and consumption. Passive cooling and natural ventilation, when combined with appropriate window ratios and sun shading strategies, can reduce mechanical system energy demands significantly. This research presents a workflow that integrates adaptive thermal comfort, natural ventilation and envelope optimization to develop a pre-policy statement as a guideline for energy efficient office buildings in Dhaka, Bangladesh. First, a common practice baseline model was developed from data collected from energy audits to gain a clear understanding of the energy consumption in typical existing office buildings in Dhaka. Adaptive Comfort Algorithms from EN15251 and ASHRAE 55 were used to calculate variable set-points related to running mean and monthly mean xv of the outdoor temperature respectively. Variable set-points have been used in EnergyPlus AirflowNetwork to determine the potential energy saving of adaptive comfort control strategy of HVAC equipment and for encouraging natural ventilation envelope strategies to create comfortable indoor environment in the local climatic context of Dhaka. A method of envelope optimization was developed by combining an optimization tool with a building energy simulation tool to determine the optimum solution for improving building envelope performance. GenOpt, a generic optimization program, has been coupled with EnergyPlus for this optimization. Then, the values of envelope and glazing parameters for optimum energy performance were determined using this automatic optimization method. The reduction of a building’s energy consumption was also addressed with regards to capital and operational costs. An economic analysis was performed to establish a correlation between energy saving and capital cost increase associated with the energy-efficient envelope measures. This research shows that significant reductions in energy consumption are possible with the application of fundamental, but not complicated, changes to local building codes and establishment of a comprehensive energy conservation code. This reduction could be even greater if inhabitant behavior can be changed, if users start to take more responsibility for their interaction directly with a building’s envelope and systems to have some degree of control over daily comfort. Technology and design innovations should be utilized for adaptive threshold of appropriate, responsive architecture.
PH.D in Architecture, May 2014
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Title: SCHEDULING FOR THROUGHPUT OPTIMIZATION IN WIMAX NETWORKS
Creator: Nusairat, Ashraf
Date: 2011-03-21, 2011-05
Description: WiMAX emerged as one of the important Broadband Wireless Access (BWA) networks based on OFDMA technology and is anticipated to be an...
Show moreWiMAX emerged as one of the important Broadband Wireless Access (BWA) networks based on OFDMA technology and is anticipated to be an alternative to wired broadband networks. WiMAX supports different emerging applications with different Quality of Service (QoS) requirements like voice over IP (VoIP), video conference, voice conference and online gaming. Those emerging wireless applications have high throughput demand and impose a challenge to the underlying Radio Access Network (RAN) scheduling algorithms. Efficient allocation of WiMAX shared resources like subchannels is critical to meeting the high throughput demand. The WiMAX resource allocation algorithms determine which users to schedule, how to allocate subcarriers to them, and how to determine the appropriate power levels for each user on each subcarrier. In WiMAX, the DL TDD OFDMA subframe structure is a rectangular area of N subchannels × K time slots. Users are assigned rectangular bursts in the downlink subframe. The burst size varies based on the user’s channel quality and data to be transmitted for the assigned user. In this dissertation we study the problem of assigning users to DL bursts in WiMAX TDD OFDMA system with the objective of maximizing downlink system throughput for the PUSC subchannelization permutation mode. We show that finding the optimal burst assignment that maximizes throughput is NP-hard. In this dissertation,We study this problem following two distinct approaches: (1) Integer Programming approach: we formulate the problem as an IP problem and then relax it to LP, we propose different methods to resolve conflicts resulting from the LP relaxation and through extensive simulations we compare the performance of the proposed conflict resolution methods to the optimal solution. (2) Best Channel approach: we propose several efficient and effective methods to assign bursts to users based on channel quality, we prove that our Best Channel burst assignment method achieves a throughput within a constant factor of the optimal and through extensive simux lations with real system parameters, we study the performance of the Best Channel burst assignment method. To the best of our knowledge, we are the first to study the problem of DL Burst Assignment in the DL OFDMA subframe for PUSC subchannelization permutation mode taking user’s channel quality into consideration in the assignment process.
Ph.D. in Computer Science, May 2011
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Title: AN INTEGRATED RESOURCE MANAGEMENT AND SCHEDULING FRAMEWORK FOR PRODUCTION SUPERCOMPUTERS
Creator: Tang, Wei
Date: 2012-07-16, 2012-07
Description: Resource management and job scheduling is a crucial task on large-scale computing systems. Despite years of research on resource management...
Show moreResource management and job scheduling is a crucial task on large-scale computing systems. Despite years of research on resource management and scheduling, it has not kept pace with modern changes and technology trends. The study of this thesis is motivated by emerging issues observed in current production supercomputers, caused by reasons such as human behaviors, application characteristics, and increasing system complexity. Specifically, users tend to provide inaccurate parameters for their jobs which are dependent by the scheduler; system owners have diverse goals which are always conflicting with each other. Also, workload characteristics on production supercomputers keep changing unpredictably, making it hard to achieve a sustainable scheduling performance since scheduling policies are largely dependent on workload characteristics. Further, increasing hardware complexity causes system issues and leads to new demands. For example, issues such as node fragmentation, failure interruption, power consumption, and I/O overhead have become common in large-scale systems. Existing resource management systems lack the support for these issues and demands. In this study, we present an integrated resource management and scheduling framework, aiming at addressing emerging issues and challenges in resource management for large-scale production supercomputers. We have designed a set of new schemes, including job parameter prediction, adaptive metric-aware job scheduling, cost-aware job scheduling, and multi-domain job coscheduling. We have implemented these approaches in the production resource manager Cobalt, and evaluated them with real job traces from production supercomputers such as the Blue Gene/P system at Argonne National Laboratory. Experimental results show our schemes can effectively improve job scheduling regarding both user satisfaction and system utilization.
Ph.D. in Computer Science, July 2012
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Title: EVALUATION OF TALL OFFICE BUILDING FORM TO ENHANCE WIND ENERGY PRODUCTION IN BUILDING INTEGRATED WIND TURBINE, A PERFORMANCE BASED APPROACH FOR EARLY DESIGN STAGE
Creator: Abdolhossein Pour, Farid
Date: 2014, 2014-12
Description: A newly emerging way to promote sustainability in the built environment is through the incorporation of wind power within buildings, resulting...
Show moreA newly emerging way to promote sustainability in the built environment is through the incorporation of wind power within buildings, resulting in minimum transmission losses (distributed generation). However, the effectiveness of the proposed solutions are seriously dependent on early integration with the architectural design process. Wind power is considered a potential renewable energy source in tall buildings due to the possibility of accessing greater wind velocities at higher altitudes. In addition, airflow patterns around buildings are considerably influenced by a buildings’ geometric characteristics. Hypothetically, proper modification of building form can turn this unstructured phenomenon in to a massive concentrator effect, capable of boosting power production in tall buildings with an integrated wind turbine (BIWT). These aerodynamic modifications are typically evaluated via CFD simulation or wind tunnel testing. However, these methods are too expensive and time-consuming to analyze all annual fluctuations of local wind regimes (velocity, direction, and density) and is therefore inappropriate for use in early design stages when architectural concepts quickly evolve. As a result, existing wind analysis techniques are often used under simplified conditions (steady state analysis, single velocity, and angle). This approach simply disregards the wide variety of other criteria influencing “BIWT annual energy output” including fluctuations of local wind regimes, and surrounding urban terrain roughness. This research seeks to address the issues indicated above, and proposes a performance based parametric design tool, primarily for the early design stages when architectural concepts evolve rapidly. The automated output delivers real time assessment of BIWT potential energy enhancement for each alternation of the concept, as well as analysis of multiple BIWT typologies simultaneously. The parametric tool employs hourly weather data, different terrain condition mathematical models, and two databases of CFD measurements to approximate annual energy enhancement as result of BIWT geometrical transformations. The tool develops a decision mechanism to find the best BIWT typology and optimum angle, based on the long-term local climatic trends and adjacent terrain context. The outcome of this dissertation is an automated parametric tool which addresses all above indicated difficulties associated with incorporation of current wind analysis method and the architectural design process of BIWT.
Ph.D. in Architecture, December 2014
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Title: MARKET DOMINANT PLUG-IN HYBRID ELECTRIC VEHICLES OPTIMAL CONTROL FOR MINIMUM CHARGING COST AND V2G REGULATION SERVICE
Creator: Li, Zhihao
Date: 2012-07-23, 2012-07
Description: Plug-in hybrid electric vehicles (PHEVs) share the characteristics of hybrid electric vehicles (HEVs) and electric vehicles (EVs), employing...
Show morePlug-in hybrid electric vehicles (PHEVs) share the characteristics of hybrid electric vehicles (HEVs) and electric vehicles (EVs), employing electric motors and internal combustion engines (ICEs) for propulsion as well as large capacity batteries for energy storage. With ICEs and fuel tank on board, PHEVs do not have the range limitations posed by EVs; large capacity battery promises long distance all-electric range (AER) and fuel efficiency improvement. PHEVs will play a vital role in future as a sustainable transportation system, promising for environment, energy solution, and economy. It is estimated that by 2015, the total number of PHEVs in the world will be approximately 1.7 million with the U.S. marking leading the industry with about one million PHEVs. Growing penetration of PHEVs will place significant impacts on the grid, either as additional electric loads or potential assets which could provide various vehicleto- grid (V2G) services. There are four potential grid services that PHEVs can provide: base load generation, peak load shaving, spinning reserve, and regulation. PHEVs are not competitive in base load or peak load markets due to limited battery capacities. In addition, PHEVs are not real generating units and the energy stored in batteries is absorbed from grid. V2G support is taken into account as frequency regulation by participating in ancillary service markets. However, if implemented without proper control, large scale PHEVs will cause increases of peak load and destabilize the grid. This paper proposes an optimization strategy to maximize V2G profits as well as to minimize charging costs. The optimization strategy is based on a forecast of future electricity price for both residential electricity and regulation market. Due to the stochastic nature of electricity price, final prices cannot be deterministically calculated. Therefore, the addressed problem is solved by stochastic dynamic programming to find the economically optimal solution with price uncertainties. Constraints caused by vehicle utilization as well as technical limitations are taken into account. Additional costs arising from discharging batteries for ancillary service can be partially or completely compensated by V2G profits. In this Ph.D. research work, economical impacts of PHEV fleet are examined in Pennsylvania Jersey Maryland (PJM) regulation market. The major contributions of this paper are: Mathematically model the optimal control of PHEV with comprehensive transition function and cost function; A full study of battery life and cost that considers different ageing factors; A stochastic study of uncertainty and volatility in electricity price; Include battery degradation and price uncertainty in the comprehensive function for optimal control.
Ph.D. in Electrical Engineering, July 2012
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Title: METHODOLOGY FOR URBAN AREA SNOW REMOVAL USING NEW MACHINE AND PERFORMANCE-BASED ANALYSIS
Creator: Neishapouri, Mohammad
Date: 2015, 2015-12
Description: The need for alternative methods that facilitate removal of snow on urban streets with minimal pavement and bridge damages, vehicles...
Show moreThe need for alternative methods that facilitate removal of snow on urban streets with minimal pavement and bridge damages, vehicles corrosions, and environmental impacts due to use of chemicals and salts has been growing over time. Conversely, this issue has not been thoroughly investigated. This is particularly true for large urban areas where the snow removal machine and background traffic share already congested streets. In this research, a new methodology is introduced for effectively managing snow removal that involves new machine and performance-based analysis. The new machine aims to melt snow and ice using technically adequate mechanical system including special engine, heat pumps and very fast ventilation pumps in order to suck and discharge water from pavement surface to road sides. The performance-based analysis employs a life cycle cost analysis approach to estimate reductions in expenditures to pavements and bridges, and vehicle corrosions of background traffic as a result of using new machine for snow melting instead of using chemicals and salts; and an optimization model for effective dispatching of new machine across a large area, leading to a significant level of travel timing savings to the background traffic owning to shorter duration oftravel way closures. The proposed methodology is implemented in a computational study to examine the current snow removal programs in the city of Chicago for a typical winter day involving moderate and severe snowfalls that correspond to its 50 percent and 100 percent programs for filed dispatching one-half and all snow plow trucks. Compared with the use of snow removal trucks coupled with chemicals and salts, the use of new machine could result in better equivalent annualized savings as benefits component and less amount of cost components which cause the project implementation has benefit to cost ratio Xl11The need for alternative methods that facilitate removal of snow on urban streets with minimal pavement and bridge damages, vehicles corrosions, and environmental impacts due to use of chemicals and salts has been growing over time. Conversely, this issue has not been thoroughly investigated. This is particularly true for large urban areas where the snow removal machine and background traffic share already congested streets. In this research, a new methodology is introduced for effectively managing snow removal that involves new machine and performance-based analysis. The new machine aims to melt snow and ice using technically adequate mechanical system including special engine, heat pumps and very fast ventilation pumps in order to suck and discharge water from pavement surface to road sides. The performance-based analysis employs a life cycle cost analysis approach to estimate reductions in expenditures to pavements and bridges, and vehicle corrosions of background traffic as a result of using new machine for snow melting instead of using chemicals and salts; and an optimization model for effective dispatching of new machine across a large area, leading to a significant level of travel timing savings to the background traffic owning to shorter duration oftravel way closures. The proposed methodology is implemented in a computational study to examine the current snow removal programs in the city of Chicago for a typical winter day involving moderate and severe snowfalls that correspond to its 50 percent and 100 percent programs for filed dispatching one-half and all snow plow trucks. Compared with the use of snow removal trucks coupled with chemicals and salts, the use of new machine could result in better equivalent annualized savings as benefits component and less amount of cost components which cause the project implementation has benefit to cost ratio respectively 2.15 and 2 by CPI analysis and 3 and 3.04 by CCI analysis. Compared with the current practice of filed dispatching of snow plow trucks or new machine for snow removal, the optimization model for vehicle dispatching could further improve the snow removal productivity by 2-4 percent for the 100 percent program and 3-8 percent for the 50 percent program, respectively.
Ph.D. in Civil Engineering, December 2015
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Title: POSTTRAUMATIC GROWTH AMONG HIV-SEROPOSITIVE ADOLESCENTS AND YOUNG ADULTS
Creator: Niel, Kristin A.
Date: 2016, 2016-12
Description: An estimated 1,218,400 individuals in the United States were living with HIV/AIDS in 2014 (CDC, November 2015). In addition, 9,731 youth...
Show moreAn estimated 1,218,400 individuals in the United States were living with HIV/AIDS in 2014 (CDC, November 2015). In addition, 9,731 youth between the ages of 13 and 24 were newly diagnosed with HIV, with 81% of those diagnoses between ages 20 and 24. African-Americans accounted for 44% of new infections, with young gay and bisexual men accounting for 72% of new infections in all persons between 13 and 24. Research has suggested that a diagnosis of HIV/AIDS can be experienced as a trauma (Kelly et al., 1998; Nightingale, Sher, Mattson, Thilges, & Hansen, 2011). Posttraumatic growth (PTG) is characterized by significant, positive transformations that may occur in response to trauma and has been linked to improved mental and physical health among people living with cancer and adults living with HIV (Barskova & Oesterreich, 2009); however, these relations have not been sufficiently explored among youth living with HIV/AIDS. This study examined 71 HIV-seropositive youth at an urban medical clinic. It was hypothesized that (1) some youth would experience their HIV diagnosis as traumatic; (2) some youth would experience PTG; (3) higher levels of PTG would be associated with better health-related quality of life; (4) PTG would be positively associated with medical regimen adherence, and this relation would be mediated by serostatus disclosure; (5) PTG would be positively associated with physiological health, and this relation would be mediated by serostatus disclosure; and (6) the relation between serostatus disclosure and PTG would be moderated by social support satisfaction. Analyses revealed that 73.2% of participants experienced their diagnosis as traumatic, and 71.8% reported some level of PTG. A positive relation existed between PTG and the Social Relationships Domain of quality of life (β= .32, p < .01). Serostatus disclosure did not act as a mediator for the relations between PTG and adherence or health; however, there was a negative relation between disclosure and appointment attendance (β = -.46, p < .05). Finally, social support satisfaction moderated the relation between disclosure and PTG, such that the relation was stronger in those with average or high support satisfaction than those with lower satisfaction. Clinical and future research implications of these findings are discussed.
Ph.D. in Psychology, December 2016
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Title: ELECTRIC-HYDRAULIC HYBRID ENERGY STORAGE SYSTEM FOR ELECTRIFIED TRANSPORTATION
Creator: Niu, Geng
Date: 2017, 2017-07
Description: Environmental issues and fossil fuel depletion push the evolution of transportation and electrified transportation into the most likely next...
Show moreEnvironmental issues and fossil fuel depletion push the evolution of transportation and electrified transportation into the most likely next generation. However, there are several challenges in electrification with the major concerns involving the energy storage system. A hybrid energy storage system may provide an opportunity to improve the energy storage system of applications in transportation electrification. Hydraulic systems have been a mature technology for a long time and this study proposes a hydraulic add-on for electric vehicles. The high power density of a hydraulic accumulator could absorb high frequency regenerative braking and support battery discharging during acceleration, which will extend the driving range and reduce the current stress of the battery pack. Several models and controls have been created to evaluate hydraulic add-ons in di↵erent applications. The simulation results show a roughly 30% current stress drop and up to 25% energy saving (Wh/km) on average for city buses and delivery trucks over di↵erent driving cycles. A scaled down prototype vehicle with a novel electric hydraulic hybrid powertrain based on a go-kart chassis was built to perform road tests to validate the simulations results.
Ph.D. in Electrical Engineering, July 2017
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Title: SURVIVABLE OPERATION OF THREE PHASE AC DRIVES IN WIND GENERATOR SYSTEMS
Creator: Shi, Xiaodong
Date: 2012-04-06, 2012-05
Description: Recent years have seen significant popularity in the use of wind generators owing to the depletion of natural resources and growing concerns...
Show moreRecent years have seen significant popularity in the use of wind generators owing to the depletion of natural resources and growing concerns about our environment. However, this development has raised issues concerning reliability of the wind turbine components. Among these faults, failure of current sensors is one of most common faults that can bring the wind generator to a standstill and lead to reduction in power yield. In addition, unscheduled maintenance often results in longer downtime and causes reduction of wind plant availability especially for those wind turbines located offshore or in remote areas. This dissertation proposes a survivable drive method to continue to operate the wind turbine in spite of current sensor failure. One of the common control strategies for the optimal of three-phase AC generators is vector control. Therefore, vector control method is implemented in this dissertation for both induction machine and Brushless PMSM. In order to achieve survivability when current sensor fault happens, a simple and effective method which doesn’t rely on current feedbacks is required as a backup control strategy. For this purpose, a digital control strategy is proposed for an induction machine and a Brushless PMSM. In addition, a current sensor failure detection method is designed to trigger the transition and a smooth transition method (only for induction machine) is implemented to ensure the smoothness of the control transition without stopping the system. Simulation and experimental results have been presented to prove feasibility and demonstrate the effectiveness of the proposed strategy.
Ph.D. in Electrical Engineering, May 2012
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Title: METHODOLOGY FOR PERFORMANCE BASED TRANSPORTATION SYSTEMS MANAGEMENT SIMULTANEOUSLY CONSIDERING DEMAND AND SUPPLY, WITH PRICING CONSIDERAnON
Creator: Patel, Harshingar
Date: 2015, 2015-05
Description: The ever growing demands for the use of transportation infrastructure and its maintenance and repairs at an acceptable level of service are...
Show moreThe ever growing demands for the use of transportation infrastructure and its maintenance and repairs at an acceptable level of service are the prime concern for transportation agencies today. The available financial resources can never be sufficient to match the exorbitantly high requirements for construction, maintenance and rehabilitation of transportation systems. With the advent of the technological revolution, the intelligence transfer amongst various engineering fields has made it possible to reduce transportation costs. However, the slow growing budget caused by economic recession and revenue decrease over time puts transportation agencies under enormous pressure to effectively restore the deteriorated transportation facility and system operation conditions under the budget constraint. The proposed research aims to utilize the concept of roadway pricing coupled with a holistic framework of asset management to support performance-based management of transportation systems and help transportation agencies achieve the future vision of the nation's strategic planning requirements to enable sustainable management of the system. A computational study for the City of Chicago’s central district is conducted by using the proposed roadway pricing framework. The proposed roadway pricing framework can be utilized for urban as well as rural regions, by public as well as private agencies, to manage the system in a sustainable manner, by means of fair pricing to the users of the system, for their facility condition and usage impacts.
Ph.D. in Civil Engineering, May 2015
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