publisher:("University of Akron")

University of Akron

1. Badawy, Mohamed O. Grid Tied PV/Battery System Architecture and Power Management for Fast Electric Vehicles Charging.

Degree: PhD, Electrical Engineering, 2016, University of Akron

URL: http://rave.ohiolink.edu/etdc/view?acc_num=akron1468858915

► The prospective spread of Electric vehicles (EV) and plug-in hybrid electric vehicles (PHEV) arises the need for fast charging rates. Higher charging rates requirements lead… (more)

▼ The prospective spread of Electric vehicles (EV) and plug-in hybrid electric vehicles (PHEV) arises the need for fast charging rates. Higher charging rates requirements lead to high power demands, which can’t be always supported by the grid. Thus, the use of on-site sources alongside the electrical grid for EVs charging is a rising area of interest. In this dissertation, a photovoltaic (PV) source is used to support the high power EVs charging. However, the PV output power has an intermittent nature that is dependable on the weather conditions. Thus, battery storage are combined with the PV in a grid tied system, providing a steady source for on-site EVs use in a renewable energy based fast charging station.Verily, renewable energy based fast charging stations should be cost effective, efficient, and reliable to increase the penetration of EVs in the automotive market. Thus, this Dissertation proposes a novel power flow management topology that aims on decreasing the running cost along with innovative hardware solutions and control structures for the developed architecture.The developed power flow management topology operates the hybrid system at the minimum operating cost while extending the battery lifetime. An optimization problem is formulated and two stages of optimization, i.e online and offline stages, are adopted to optimize the batteries state of charge (SOC) scheduling and continuously compensate for the forecasting errors. The proposed power flow management topology is validated and tested with two metering systems, i.e unified and dual metering systems. The results suggested that minimal power flow is anticipated from the battery storage to the grid in the dual metering system. Thus, the power electronic interfacing system is designed accordingly. Interconnecting bi-directional DC/DC converters are analyzed, and a cascaded buck boost (CBB) converter is chosen and tested under 80 kW power flow rates. The need to perform power factor correction (PFC) on the grid power while supplying the battery storage and the DC loads inspired a novel dual switch control structure for the CBB AC/DC converter used in this dissertation. Thus, The CBB operates at a discontinuous capacitor voltage mode (DCVM) and the control structure enables for a non-distorted input current at overlapping output voltage levels. The PFC concept is validated and tested for a single phase rectifier and a 3 phase extension of the proposed concept is presented.Lastly, the PV source used in this study is required to supply power to both, the grid system, and to the DC loads, i.e the battery storage and the EVs. Thus, the PV panels used are connected in series to reach a desirable high voltage on the DC bus output of the PV system. Consequently, a novel differential power processing architecture is proposed in this dissertation. The proposed architecture enables each PV element to operate at its local maximum power point (MPP) while processing only a small portion of its total generated power through the distributed integrated converters. This… Advisors/Committee Members: Sozer, Yilmaz (Committee Chair).

Subjects/Keywords: Electrical Engineering; Energy; AC-DC Rectifier; DC-DC Converter; Discontinuous Conduction Mode; Electric Vehicles; Electric Vehicle Charging Stations; Fast Electric Vehicles Charging; Optimization; Photovoltaic; Power Factor Correction; Power Flow Management; Solar Energy

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APA (6^th Edition):

Badawy, M. O. (2016). Grid Tied PV/Battery System Architecture and Power Management for Fast Electric Vehicles Charging. (Doctoral Dissertation). University of Akron. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=akron1468858915

Chicago Manual of Style (16^th Edition):

Badawy, Mohamed O. “Grid Tied PV/Battery System Architecture and Power Management for Fast Electric Vehicles Charging.” 2016. Doctoral Dissertation, University of Akron. Accessed February 16, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1468858915.

MLA Handbook (7^th Edition):

Badawy, Mohamed O. “Grid Tied PV/Battery System Architecture and Power Management for Fast Electric Vehicles Charging.” 2016. Web. 16 Feb 2019.

Vancouver:

Badawy MO. Grid Tied PV/Battery System Architecture and Power Management for Fast Electric Vehicles Charging. [Internet] [Doctoral dissertation]. University of Akron; 2016. [cited 2019 Feb 16]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1468858915.

Council of Science Editors:

Badawy MO. Grid Tied PV/Battery System Architecture and Power Management for Fast Electric Vehicles Charging. [Doctoral Dissertation]. University of Akron; 2016. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1468858915

University of Akron

2. Easterling, Ted. KEEPING THE FISH OUT OF THE WATER: UNITED STATES MARINE CORPS COMBINED ACTION PLATOONS IN THE VIETNAM WAR.

Degree: PhD, History, 2016, University of Akron

URL: http://rave.ohiolink.edu/etdc/view?acc_num=akron1470338869

► The United States is often criticized for using ineffective strategies and tactics to fight theVietnam War, but the United States Marine Corps attempted to use… (more)

Subjects/Keywords: History; Military History; Military Studies; Vietnam War; counterinsurgency; guerrilla warfare; combined action platoon

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APA (6^th Edition):

Easterling, T. (2016). KEEPING THE FISH OUT OF THE WATER: UNITED STATES MARINE CORPS COMBINED ACTION PLATOONS IN THE VIETNAM WAR. (Doctoral Dissertation). University of Akron. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=akron1470338869

Chicago Manual of Style (16^th Edition):

Easterling, Ted. “KEEPING THE FISH OUT OF THE WATER: UNITED STATES MARINE CORPS COMBINED ACTION PLATOONS IN THE VIETNAM WAR.” 2016. Doctoral Dissertation, University of Akron. Accessed February 16, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1470338869.

MLA Handbook (7^th Edition):

Easterling, Ted. “KEEPING THE FISH OUT OF THE WATER: UNITED STATES MARINE CORPS COMBINED ACTION PLATOONS IN THE VIETNAM WAR.” 2016. Web. 16 Feb 2019.

Vancouver:

Easterling T. KEEPING THE FISH OUT OF THE WATER: UNITED STATES MARINE CORPS COMBINED ACTION PLATOONS IN THE VIETNAM WAR. [Internet] [Doctoral dissertation]. University of Akron; 2016. [cited 2019 Feb 16]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1470338869.

Council of Science Editors:

Easterling T. KEEPING THE FISH OUT OF THE WATER: UNITED STATES MARINE CORPS COMBINED ACTION PLATOONS IN THE VIETNAM WAR. [Doctoral Dissertation]. University of Akron; 2016. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1470338869

University of Akron

3. Guzman Cardozo, Gustavo A, Guzman. Bimodal Amphiphilic Polymer Conetworks: Structure-Property Characterization, Processing and Applications.

Degree: PhD, Polymer Engineering, 2016, University of Akron

URL: http://rave.ohiolink.edu/etdc/view?acc_num=akron1471428782

► The first part of this study presents a strategy for the synthesis of novel bimodal amphiphilic grafts consisting of hydrophilic poly (N,N-dimethylacrylamide) (PDMAAm) main chains… (more)

▼ The first part of this study presents a strategy for the synthesis of novel bimodal amphiphilic grafts consisting of hydrophilic poly (N,N-dimethylacrylamide) (PDMAAm) main chains carrying two different molecular weight hydrophobic polydimethylsiloxane (PDMS) branches whose crosslinking leads to bimodal amphiphilic conetworks (ß-APCNs). The effect of crosslinker ratio and amount of high molecular weight PDMS on the conetwork’s morphology, swelling characteristics and mechanical properties were evaluated. The materials exhibited bulk microphase separation with short-range ordering, and superficial demixing with only the hydrophobic phase present at the surface. A multi-scale, composition-dependent, elastic wrinkling-instability was shown to control surface morphology. The coexistence of low and high molecular weight PDMS in ß-APCNs greatly improved ultimate mechanical properties. The second study concerns the structure development of ß-APCNs during film processing from solution. Time-resolved gravimetry, low contact angles and negative out-of-plane birefringence provided strong experimental evidence of transitory trapping of thermodynamically unfavorable hydrophilic moieties at the air-film interface due to fast asymmetric solvent depletion. We also find that slow-drying hydrophobic elements progressively substitute hydrophilic domains at the surface as the surface-energy is minimized. The third study proposes a novel approach to zero-order, constant-rate drug delivery from ß-APCN-based contact lenses. Quasi-Case II non-Fickian transport was achieved by non-uniform drug and diffusivity distributions within three-layer bimodal amphiphilic conetworks. We demonstrated experimentally and by modeling that the combined effect of non-uniform distribution of drug loading and diffusion constants within the three-layer lens maintains low local drug concentration at the lens-fluid interface and yields zero-order drug delivery.The final study uses in-situ ellipsometry, contact angle measurements, and X-ray photoelectron spectroscopy to investigate the swelling behavior, surface characteristics and adsorption of plasma proteins of bimodal amphiphilic conetworks (ß-APCNs). We demonstrated that plasma protein adsorption in ß-APCNs is transport-limited. ß-APCNs have the ability to reconfigure their surfaces depending on the medium as evidenced by large contact angle hysteresis, so that in aqueous solution hydrophilic moieties populate the surface. Protein adsorption occurred at the hydrophobic PDMS domains (which become buried in the bulk after swelling) and plasma proteins needed to diffuse into the conetwork in order to adsorb. Desorption was dependent on the initial adsorption rate. Advisors/Committee Members: Younjin, Min (Committee Chair), Cakmak, Mukerrem (Advisor).

Subjects/Keywords: Polymers; Polymer Chemistry; Plastics; Biomedical Engineering; Amphiphilic conetworks; bimodality; wrinklin; immunoisolation; birefringence; orientation; drying; zero-order; drug release; contact lenses; protein adsorption

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Guzman Cardozo, Gustavo A, G. (2016). Bimodal Amphiphilic Polymer Conetworks: Structure-Property Characterization, Processing and Applications. (Doctoral Dissertation). University of Akron. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=akron1471428782

Chicago Manual of Style (16^th Edition):

Guzman Cardozo, Gustavo A, Guzman. “Bimodal Amphiphilic Polymer Conetworks: Structure-Property Characterization, Processing and Applications.” 2016. Doctoral Dissertation, University of Akron. Accessed February 16, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1471428782.

MLA Handbook (7^th Edition):

Guzman Cardozo, Gustavo A, Guzman. “Bimodal Amphiphilic Polymer Conetworks: Structure-Property Characterization, Processing and Applications.” 2016. Web. 16 Feb 2019.

Vancouver:

Guzman Cardozo, Gustavo A G. Bimodal Amphiphilic Polymer Conetworks: Structure-Property Characterization, Processing and Applications. [Internet] [Doctoral dissertation]. University of Akron; 2016. [cited 2019 Feb 16]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1471428782.

Council of Science Editors:

Guzman Cardozo, Gustavo A G. Bimodal Amphiphilic Polymer Conetworks: Structure-Property Characterization, Processing and Applications. [Doctoral Dissertation]. University of Akron; 2016. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1471428782

University of Akron

4. Yu, Qing. APPLICATIONS OF HUMAN BONE MATERIALS AND SYNTHESIZED BIOMATERIALS FOR BONE-RELATED TISSUE ENGINEERING.

Degree: PhD, Polymer Science, 2016, University of Akron

URL: http://rave.ohiolink.edu/etdc/view?acc_num=akron1476959113257058

► Engineered bone grafting has been considered as one of the alternative methods for bone regeneration in both fundamental research and clinical applications to address bone… (more)

▼ Engineered bone grafting has been considered as one of the alternative methods for bone regeneration in both fundamental research and clinical applications to address bone disorders. Bone graft materials, autologous bone, allogeneic bone and synthetic polymer scaffolds have been commonly utilized surgically as substrates for bone grafting. In this dissertation, periosteum, a thin membrane in which progenitor cells can develop into osteoblasts to regenerate bone tissue, has been applied in three different studies to determine its capability to induce new bone formation. In the first study, human periosteum-wrapped bone allografts were implanted subcutaneously in athymic mice followed by sample harvest and gene expression analysis and histological assessment. The second study developed a tissue-engineering approach to generate a functional tendon-to-bone enthesis. In this instance, the constructs were fabricated from human periosteum-wrapped allograft bone and tenocyte- and chondrocyte-seeded biomaterials. The constructs were then implanted with and without mechanical force by either tethering them to the trapezius and gluteus maximus muscles of athymic mice or not tethering them at all. Biomechanical, histological, and histochemical properties of these tendon-to-bone enthesis models were analyzed following their implantation. The third study was designed to determine the possible effects of bromine- or silicon-functionalized poly(lactic acid) (Si-PLA) scaffolds on skeletal development. To examine initially the cytotoxicity of bromine on periosteal cells, a PrestoBlue® assay was performed on human periosteal cell-seeded brominated PLA scaffolds over a 21-day time period. With application of histological and gene expression analysis, new bone formation and resorption were detected in human-periosteum allografts implanted for different time periods. Correlated histological and gene data showed that periosteum has the capability of inducing bone regeneration in allografts and in tendon-to-bone enthesis models. Tissue-engineered enthesis models fabricated with periosteum-allograft and chondrocyte- and tenocyte-seeded scaffolds provide a novel method for healing enthesis defects in regenerative medicine. In addition, results from bromine cytotoxicity studies of human periosteal cells imply subsequent Si-PLA experiments with minimal numbers of bromine residues on the backbone of PLA. These tissue engineering investigations suggest that both allograft bone and biosynthetic polymers have great potential in regenerative medicine applications for bone. Advisors/Committee Members: Sahai, Nita (Committee Chair), Landis, William (Advisor).

Subjects/Keywords: Biomedical Research; Biomedical Engineering; Polymers; Bone tissue engineering; biomaterials; enthesis; segmental bone defects; bone grafts

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APA (6^th Edition):

Yu, Q. (2016). APPLICATIONS OF HUMAN BONE MATERIALS AND SYNTHESIZED BIOMATERIALS FOR BONE-RELATED TISSUE ENGINEERING. (Doctoral Dissertation). University of Akron. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=akron1476959113257058

Chicago Manual of Style (16^th Edition):

Yu, Qing. “APPLICATIONS OF HUMAN BONE MATERIALS AND SYNTHESIZED BIOMATERIALS FOR BONE-RELATED TISSUE ENGINEERING.” 2016. Doctoral Dissertation, University of Akron. Accessed February 16, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1476959113257058.

MLA Handbook (7^th Edition):

Yu, Qing. “APPLICATIONS OF HUMAN BONE MATERIALS AND SYNTHESIZED BIOMATERIALS FOR BONE-RELATED TISSUE ENGINEERING.” 2016. Web. 16 Feb 2019.

Vancouver:

Yu Q. APPLICATIONS OF HUMAN BONE MATERIALS AND SYNTHESIZED BIOMATERIALS FOR BONE-RELATED TISSUE ENGINEERING. [Internet] [Doctoral dissertation]. University of Akron; 2016. [cited 2019 Feb 16]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1476959113257058.

Council of Science Editors:

Yu Q. APPLICATIONS OF HUMAN BONE MATERIALS AND SYNTHESIZED BIOMATERIALS FOR BONE-RELATED TISSUE ENGINEERING. [Doctoral Dissertation]. University of Akron; 2016. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1476959113257058

University of Akron

5. Gao, Zhicheng. Corrosion Damage of Reinforcement Embedded in Reinforced Concrete Slab.

Degree: PhD, Civil Engineering, 2016, University of Akron

URL: http://rave.ohiolink.edu/etdc/view?acc_num=akron1478174479305336

► Corrosion of reinforcements embedded in concrete is a worldwide problem that affects numerous reinforced concrete (RC) structures. While corrosion has always been problematic since the… (more)

▼ Corrosion of reinforcements embedded in concrete is a worldwide problem that affects numerous reinforced concrete (RC) structures. While corrosion has always been problematic since the beginning of mining and refinery of metals, corrosion in RC structures only gained research attention during the 1960s and 1970s, following widespread use of de-icing salts on highways in United States. Since then, research has been undertaken worldwide to address corrosion issues. In this dissertation, an experimental study was conducted to characterize the structural behavior of reinforced concrete slabs subjected to accelerated corrosion in the lab.In order to make the experimental condition similar to the real service environment, the test specimens were introduced with pre-existing cracks and sustained loading was applied during the corrosion process. Accelerated corrosion of tensile steel reinforcements in RC slabs was facilitated by an accelerated corrosion process. Three different test conditions were induced in the corrosion test program: specimens without pre-existing cracks and sustained loading, specimens with pre-existing cracks but no sustained loading, and specimens with pre-existing cracks and sustained loading. In addition, different wetting and drying cycles were incorporated in the corrosion process. Expansion of longitudinal cracks along the tensile reinforcements and transverse cracks crossing the tensile reinforcements were recorded during the corrosion testing. Multiple desired corrosion levels-from low level (1%) to high level (20%)- were applied to different specimens. The gravimetric metal loss along the longitudinal direction of reinforcements was measured after the bending test. An empirical relationship was developed based on the representative specimens corroded with pre-existing cracks and sustained loading conditions for all desired corrosion levels.The epoxy-coated reinforcements and polypropylene (PP) fibers were used during casting experimental specimens to assess their corrosion resistance properties. By using the constant electric current, 10 and 20% desired corrosion levels were applied to most specimens, and 40% desired corrosion level was also applied to several test specimens with PP fibers additives to simulate the severe corrosion condition. The surface defects of epoxy-coated reinforcements and two different quantity ratios of PP fibers - 4.5 kg/m³ and 6 kg/m³ were considered in this study.The ultimate capacity of corroded specimens was tested after corrosion process. The average metal loss, the reduced yield strength of corroded reinforced bars and the effective cross section of the specimens can accurately predict the theoretical ultimate capacity loss compared with testing results. The critical inner expansive pressure from XFEM was applied to the developed numerical model to predict the cracking time of the cover concrete, which is defined as the severability limitation of the corroded RC structures. The proposed prediction model had been validated by comparing with the existing… Advisors/Committee Members: Patnaik, Anil (Advisor), Liang, Robert (Advisor).

Subjects/Keywords: Civil Engineering; corrosion; reinforced concrete; cracks; metal loss

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Gao, Z. (2016). Corrosion Damage of Reinforcement Embedded in Reinforced Concrete Slab. (Doctoral Dissertation). University of Akron. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=akron1478174479305336

Chicago Manual of Style (16^th Edition):

Gao, Zhicheng. “Corrosion Damage of Reinforcement Embedded in Reinforced Concrete Slab.” 2016. Doctoral Dissertation, University of Akron. Accessed February 16, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1478174479305336.

MLA Handbook (7^th Edition):

Gao, Zhicheng. “Corrosion Damage of Reinforcement Embedded in Reinforced Concrete Slab.” 2016. Web. 16 Feb 2019.

Vancouver:

Gao Z. Corrosion Damage of Reinforcement Embedded in Reinforced Concrete Slab. [Internet] [Doctoral dissertation]. University of Akron; 2016. [cited 2019 Feb 16]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1478174479305336.

Council of Science Editors:

Gao Z. Corrosion Damage of Reinforcement Embedded in Reinforced Concrete Slab. [Doctoral Dissertation]. University of Akron; 2016. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1478174479305336

University of Akron

6. Liu, Bo. On-chip Touch Sensor Readout Circuit Using Sigma-delta Modulator Based Capacitance-to-Digital Converter.

Degree: MS, Electrical Engineering, 2017, University of Akron

URL: http://rave.ohiolink.edu/etdc/view?acc_num=akron1450051321

► This work describes a capacitive type touch sensor readout circuit using passive sigma-delta modulator based capacitance-to-digital converter. With the proposed approach, the panel condition (touched… (more)

Subjects/Keywords: Electrical Engineering

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APA (6^th Edition):

Liu, B. (2017). On-chip Touch Sensor Readout Circuit Using Sigma-delta Modulator Based Capacitance-to-Digital Converter. (Masters Thesis). University of Akron. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=akron1450051321

Chicago Manual of Style (16^th Edition):

Liu, Bo. “On-chip Touch Sensor Readout Circuit Using Sigma-delta Modulator Based Capacitance-to-Digital Converter.” 2017. Masters Thesis, University of Akron. Accessed February 16, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1450051321.

MLA Handbook (7^th Edition):

Liu, Bo. “On-chip Touch Sensor Readout Circuit Using Sigma-delta Modulator Based Capacitance-to-Digital Converter.” 2017. Web. 16 Feb 2019.

Vancouver:

Liu B. On-chip Touch Sensor Readout Circuit Using Sigma-delta Modulator Based Capacitance-to-Digital Converter. [Internet] [Masters thesis]. University of Akron; 2017. [cited 2019 Feb 16]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1450051321.

Council of Science Editors:

Liu B. On-chip Touch Sensor Readout Circuit Using Sigma-delta Modulator Based Capacitance-to-Digital Converter. [Masters Thesis]. University of Akron; 2017. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1450051321

University of Akron

7. Panakarajupally, Ragavendra Prasad. A COMPUTATIONAL INVESTIGATION OF INJECTION STRATEGIES AND SENSITIVITY ANALYSIS OF AN ETHANOL FUELLED PPCI ENGINE.

Degree: MS, Mechanical Engineering, 2016, University of Akron

URL: http://rave.ohiolink.edu/etdc/view?acc_num=akron1468517270

► An Ethanol fueled PPCI (Partially Premixed Compression Ignition) engine was computationally studied to understand the effect of injection strategies on efficiency, emissions, and noise. The… (more)

▼ An Ethanol fueled PPCI (Partially Premixed Compression Ignition) engine was computationally studied to understand the effect of injection strategies on efficiency, emissions, and noise. The CI engine selected for this study was a heavy duty single cylinder engine having a displacement of 2123 cm3 with a compression ratio of 17.3 at a medium load of approximately 12 bar IMEP. CFD modelling with detailed chemistry was done using converge CFD package. All the CFD simulations presented in this study were conducted on a single engine sector to reduce the computational time and the simulations were run from Intake valve closure (IVC) to Exhaust valve opening (EVO). The injection strategy used in this study is a double injection strategy. A series of simulations were run in order to obtain the optimum injection parameters. First, the start of the first injection was changed from -60 CAD (crank angle degree) to -20 CAD (crank angle degree) by keeping the start of second injection constant at -5 CAD. Secondly, the start of the second injection was changed from -10 CAD to -2 CAD by keeping the start of first injection constant at -5 CAD. Lastly, the injection mass percentage in the first and second injection was changed from 60-40 % to 90-10 % by keeping the start of first injection and second injection constant at -50 CAD and -10 CAD.The results obtained from these simulations give the optimum injection parameters which will have high thermal efficiency with reduced emissions and noise. The optimum injection parameters obtained are SOFI at -50 CAD and SOSI at -10 CAD with 70 % of the fuel injected in the first injection and 30 % in the second injection. Subsequently, the sensitivity of the engine combustion to change in inlet temperature and inlet pressure was studied by keeping the obtained optimum injection parameters. The results obtained from this showed that the engine combustion is highly sensitive to inlet temperature than the inlet pressure. Additionally, the strategies required to recover the optimum performance of the engine were explored. Advisors/Committee Members: Mittal, Gaurav (Advisor).

Subjects/Keywords: Mechanical Engineering; Computational study, Multiple Injection Strategies, Ethanol, Sensitivity Analysis, Partially Premixed Compression Ignition, PPCI

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Panakarajupally, R. P. (2016). A COMPUTATIONAL INVESTIGATION OF INJECTION STRATEGIES AND SENSITIVITY ANALYSIS OF AN ETHANOL FUELLED PPCI ENGINE. (Masters Thesis). University of Akron. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=akron1468517270

Chicago Manual of Style (16^th Edition):

Panakarajupally, Ragavendra Prasad. “A COMPUTATIONAL INVESTIGATION OF INJECTION STRATEGIES AND SENSITIVITY ANALYSIS OF AN ETHANOL FUELLED PPCI ENGINE.” 2016. Masters Thesis, University of Akron. Accessed February 16, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1468517270.

MLA Handbook (7^th Edition):

Panakarajupally, Ragavendra Prasad. “A COMPUTATIONAL INVESTIGATION OF INJECTION STRATEGIES AND SENSITIVITY ANALYSIS OF AN ETHANOL FUELLED PPCI ENGINE.” 2016. Web. 16 Feb 2019.

Vancouver:

Panakarajupally RP. A COMPUTATIONAL INVESTIGATION OF INJECTION STRATEGIES AND SENSITIVITY ANALYSIS OF AN ETHANOL FUELLED PPCI ENGINE. [Internet] [Masters thesis]. University of Akron; 2016. [cited 2019 Feb 16]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1468517270.

Council of Science Editors:

Panakarajupally RP. A COMPUTATIONAL INVESTIGATION OF INJECTION STRATEGIES AND SENSITIVITY ANALYSIS OF AN ETHANOL FUELLED PPCI ENGINE. [Masters Thesis]. University of Akron; 2016. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1468517270

University of Akron

8. Delaney, Adam J. Effects of climate and development on the hydrology and geomorphology of the Yellow Creek Watershed, Summit and Medina Counties, OH.

Degree: MS, Geology, 2016, University of Akron

URL: http://rave.ohiolink.edu/etdc/view?acc_num=akron1479127682219327

► The goal of this study was to determine the relative contributions of increased flood frequency and continued land development on geomorphic change and damage to… (more)

▼ The goal of this study was to determine the relative contributions of increased flood frequency and continued land development on geomorphic change and damage to infrastructure throughout the Yellow Creek, OH watershed. Comprised of five sub-watersheds, the Yellow Creek watershed is located in Northeast Ohio and is a tributary of the Cuyahoga River. In Northeast Ohio, a statistically significant change point in both heavy precipitation and stream flow occurred in July 2003. On the USGS Cuyahoga River Old Portage stream gage record, there were only 18 days of mean daily discharge above the top 1% flood category (76 m³s^-1) during the 13 years prior to July 2003 compared to 79 days in the 13 years after July 2003. Land cover data reveals that impervious cover in the watershed has increased by 0.80% from 1985-1996, 0.32% from 1996-2001, 0.67% from 2001-2006, and 0.38% from 2006-2010. The five sub-watersheds have contrasting development histories and vary from 4.5% to 23.5% imperviousness. Water level loggers were installed to measure hydrograph variability between the five sub-watersheds. Water samples were also taken on 11/10/15, 2/3/16, and 2/24/16 in the five sub-watershed streams to find the effect development has on road salt concentration in the stream. Aerial photos for nine years between 1994 and 2015 were used to assess changes in stream geomorphology through time. Results show that geomorphic change has been greater after July 2003 compared to before July 2003. These post-2003 geomorphic changes include an increase in unvegetated mid-channel bars and point bars as well as amplified channel migration. Elsewhere, Yellow Creek shows straightening and widening in response to increased flooding events. The 2000 to 2005 and 2012 to 2015 photo intervals showed the largest geomorphic change throughout the Yellow Creek watershed, especially in areas with steep topography and stream slope. Although urbanization in the watershed results in increased runoff, since 2003 increased flood frequency has a larger effect on geomorphology change than increases in development. Upon analyzing data from water level loggers, results show that land cover, vegetative cover, soils, slope, precipitation intensity, and flood storage capacity all play an important role on hydrograph shape and time of peak discharge between the five sub-watershed streams. Sourek Run is the sub-watershed with the largest amount of impervious cover (23.5% as of 2010) and is the flashiest sub-watershed of the five and sensitive to small-scale precipitation events. The headwater, Upper Yellow Creek with less impervious cover (8.93% as of 2010) shows a generally round hydrograph and arrives later in time relative to other sub-watersheds likely due to its low slope, increased soil storage capacity and infiltration. Winter time snow melt and high magnitude summer time rainfall events created synchronous or near synchronous peak discharge time between the five sites. It also was found that road salt contamination was present in the Yellow… Advisors/Committee Members: Peck, John (Advisor).

Subjects/Keywords: Geomorphology; Hydrology; Geology; Geomorphology; Fluvial Geomorphology; Hydrology; Road Salt; Yellow Creek Watershed

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APA (6^th Edition):

Delaney, A. J. (2016). Effects of climate and development on the hydrology and geomorphology of the Yellow Creek Watershed, Summit and Medina Counties, OH. (Masters Thesis). University of Akron. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=akron1479127682219327

Chicago Manual of Style (16^th Edition):

Delaney, Adam J. “Effects of climate and development on the hydrology and geomorphology of the Yellow Creek Watershed, Summit and Medina Counties, OH.” 2016. Masters Thesis, University of Akron. Accessed February 16, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1479127682219327.

MLA Handbook (7^th Edition):

Delaney, Adam J. “Effects of climate and development on the hydrology and geomorphology of the Yellow Creek Watershed, Summit and Medina Counties, OH.” 2016. Web. 16 Feb 2019.

Vancouver:

Delaney AJ. Effects of climate and development on the hydrology and geomorphology of the Yellow Creek Watershed, Summit and Medina Counties, OH. [Internet] [Masters thesis]. University of Akron; 2016. [cited 2019 Feb 16]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1479127682219327.

Council of Science Editors:

Delaney AJ. Effects of climate and development on the hydrology and geomorphology of the Yellow Creek Watershed, Summit and Medina Counties, OH. [Masters Thesis]. University of Akron; 2016. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1479127682219327

University of Akron

9. Gowda, Sunil. MULTI-SCALE EFFECTS OF CORROSION ON STEEL STRUCTURES.

Degree: PhD, Civil Engineering, 2016, University of Akron

URL: http://rave.ohiolink.edu/etdc/view?acc_num=akron1469007207

► Corrosion is a naturally occurring process which under favorable environmental conditions, causes deterioration of metals when exposed to corrosive environment for an extended period of… (more)

▼ Corrosion is a naturally occurring process which under favorable environmental conditions, causes deterioration of metals when exposed to corrosive environment for an extended period of time. This time dependent factor related to corrosion rate is an important factor among others, affecting the process of corrosion itself. Some of these factors can be controlled and some may not. Steel structures like bridges are essentially made of structural members such as beams, compression members and plate girders. Ship structures are made up of a combination of steel plates and stiffened panels. Such structural steel members, in their respective applications are susceptible to different types of corrosion depending on the environment they are exposed to. Uniform corrosion, non-uniform corrosion and pitting corrosion are the most common types of corrosion affecting all of the mentioned steel structural members. Without proper maintenance procedures, corrosion can cause needless financial and safety burdens on steel structures. Therefore, studying the effect of these types of corrosion on the strength of structural members used in civil engineering applications, forms the core objective of this research.In order to achieve the desired objective of this research, a “multi-scale” approach was taken to understand the effects of corrosion on steel structures. A framed industrial steel structure in Akron, Ohio which is part of a salt manufacturing plant was considered and the global effect of uniform corrosion on the entire framework consisting of standard steel shapes such as wide flanged beams, angles, channel sections and hollow sections is studied. This constitutes the mega-scale level in this study. The macro-scale level consists of studying the effects of non-uniform corrosion on the load carrying capacity of individual members which make up a structural system, such as wide flanged beams. These beams are assumed to have reduced thicknesses in either the webs or flanges, simulating non-uniform corrosion occurring along the length of the beam and are analyzed using a standard finite element analysis program ABAQUS to determine the load carrying capacity of deteriorated I-beam sections. The effect of various levels of pitting corrosion including beams with web holes are also simulated and analyzed to determine the strength reduction of a beam. Steel plates and stiffened panels which form the core structural components in ship structures are also considered to study the effects of corrosion on the strength of these members under appropriate loading and boundary conditions. An accelerated corrosion procedure called GMW14872 was employed to corrode ASTM E8 samples and to study the effects of corrosion on short term and long term mechanical properties such as tensile and fatigue strengths of ASTM A572 structural steel. This forms the micro-level in the multi-scale approach. Scanning electron microscopy was employed to study the effects of corrosion on the mechanical properties of steel samples by observing the optical micrographs at… Advisors/Committee Members: Srivatsan, Tirumalai (Advisor), Patnaik, Anil (Advisor).

Subjects/Keywords: Civil Engineering; Corrosion; steel structures

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APA (6^th Edition):

Gowda, S. (2016). MULTI-SCALE EFFECTS OF CORROSION ON STEEL STRUCTURES. (Doctoral Dissertation). University of Akron. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=akron1469007207

Chicago Manual of Style (16^th Edition):

Gowda, Sunil. “MULTI-SCALE EFFECTS OF CORROSION ON STEEL STRUCTURES.” 2016. Doctoral Dissertation, University of Akron. Accessed February 16, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1469007207.

MLA Handbook (7^th Edition):

Gowda, Sunil. “MULTI-SCALE EFFECTS OF CORROSION ON STEEL STRUCTURES.” 2016. Web. 16 Feb 2019.

Vancouver:

Gowda S. MULTI-SCALE EFFECTS OF CORROSION ON STEEL STRUCTURES. [Internet] [Doctoral dissertation]. University of Akron; 2016. [cited 2019 Feb 16]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1469007207.

Council of Science Editors:

Gowda S. MULTI-SCALE EFFECTS OF CORROSION ON STEEL STRUCTURES. [Doctoral Dissertation]. University of Akron; 2016. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1469007207

University of Akron

10. Volkova, Olga. Changes in attitude and self-reported smoking behavior of youth with different social economic status pre-and-post implementation of WHO tobacco control policies in Ukraine during 2005-2011.

Degree: PhD, Public Administration, 2016, University of Akron

URL: http://rave.ohiolink.edu/etdc/view?acc_num=akron1471539193

► This study examines an attitude to tobacco control policy and self-reported behavior of youth in reference to pre - post adaptation of WHO tobacco control… (more)

▼ This study examines an attitude to tobacco control policy and self-reported behavior of youth in reference to pre - post adaptation of WHO tobacco control policies in Ukraine during 2005-2011 with and without the consideration of their socioeconomic status. The study utilizes the data from Global Youth Tobacco survey (GYTS) which was gathered in Ukraine in 2005 and 2011. The results of study reveal a statistical significant difference in both attitude and self-reported behavior pre and post adaptation of WHO tobacco control policies. The difference, however, has a small size effect which implies of the need to more effectively implement the policies directed toward increasing taxes, tobacco products advertisement regulation, and smoke free environment law. There is a need of strengthening public health policy efforts in anti-smoking interventions, themes, and approaches. The findings also show that youth of different levels of socioeconomic status do not differ in their attitude toward tobacco control policies and do not differ in their self-reported observation of pro-smoking advertisements pre and post adaptation of WHO tobacco control polices. Youth of different levels of socioeconomic status, however, differ in their self-reported observation of anti-smoking advertisements and self-reported smoking behavior pre and post adaptation of WHO tobacco control policies which signals of a need for a targeted approach for different socioeconomic status groups to equally increase the positive outcome of policies for all socioeconomic status groups. Therefore, the consideration of socioeconomic status should be embedded into the preferred policy tools for the individuals with different socioeconomic status to bear the desired policy outcome. A future agenda, therefore, will be to find means for overcoming difficulties in identifying socioeconomic status groups in the Ukraine, obtaining behavioral data on the different socioeconomic groups, developing strong and simple approaches in reaching vulnerable socioeconomic groups, and implementing long-term strategies. This study, therefore, helps to address an important gap in the policy development literature and provides the recommendations on the effective tobacco control policies practical implementation. Advisors/Committee Members: Cox, Raymond (Committee Chair).

Subjects/Keywords: Public Administration; Public Policy

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APA (6^th Edition):

Volkova, O. (2016). Changes in attitude and self-reported smoking behavior of youth with different social economic status pre-and-post implementation of WHO tobacco control policies in Ukraine during 2005-2011. (Doctoral Dissertation). University of Akron. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=akron1471539193

Chicago Manual of Style (16^th Edition):

Volkova, Olga. “Changes in attitude and self-reported smoking behavior of youth with different social economic status pre-and-post implementation of WHO tobacco control policies in Ukraine during 2005-2011.” 2016. Doctoral Dissertation, University of Akron. Accessed February 16, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1471539193.

MLA Handbook (7^th Edition):

Volkova, Olga. “Changes in attitude and self-reported smoking behavior of youth with different social economic status pre-and-post implementation of WHO tobacco control policies in Ukraine during 2005-2011.” 2016. Web. 16 Feb 2019.

Vancouver:

Volkova O. Changes in attitude and self-reported smoking behavior of youth with different social economic status pre-and-post implementation of WHO tobacco control policies in Ukraine during 2005-2011. [Internet] [Doctoral dissertation]. University of Akron; 2016. [cited 2019 Feb 16]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1471539193.

Council of Science Editors:

Volkova O. Changes in attitude and self-reported smoking behavior of youth with different social economic status pre-and-post implementation of WHO tobacco control policies in Ukraine during 2005-2011. [Doctoral Dissertation]. University of Akron; 2016. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1471539193

University of Akron

11. Chanawanno, Kullapa. Synthetic Studies of Re(CO)3 Bioconjugates, Azadipyrromethenes, and Ferrocene-modified Compounds.

Degree: PhD, Chemistry, 2016, University of Akron

URL: http://rave.ohiolink.edu/etdc/view?acc_num=akron1475756546217373

► The rhenium tricarbonyl (Re(CO)3+) is one of the most commonly used organometallic cores for labeling various molecular types. The direct labeling of Re(I) via imine… (more)

▼ The rhenium tricarbonyl (Re(CO)3+) is one of the most commonly used organometallic cores for labeling various molecular types. The direct labeling of Re(I) via imine formation by the use of pyridine-2-carboxaldehyde (pyca) was achieved by coordination to the fac-[Re(CO)3]+. The Re(CO)3-aldehyde adduct reacts with a variety of aromatic/aliphatic amines and peptides resulting in Re(CO)3-conjugates. In the second chapter, this thesis presents a study on Re(CO)3 pyridine–imine complexes with pendant phenol groups. The effects of the position of the hydroxyl group (para, meta or ortho to the imine) were investigated. These compounds exhibit pH-dependent metal-to-ligand charge transfer bands. A series of Re(CO)3-imine with ferrocenyl units was presented in the third chapter. Hydrazine can be used as a linker to connect ferrocene and Re(CO)3, resulting in 1:1, 2:1, and 1:2 ferrocene:Re(CO)3 complexes. The electrochemistry and spectroscopy of the compounds were investigated and DFT and TDDFT calculations provided insight electronic structures of the conjugates. In the fourth chapter, this thesis presents a Re(CO)3-modified lysine that can be generated in a one-pot reaction. This Re(CO)3-modified lysine can be incorporated into four different peptides using solid phase peptide synthesis. And cellular uptake was monitored via the use of a fluorescein modified variant. The number of studies of azadipyrromethenes (ADPM) and their BF2 complexes (aza-BODIPY) has been growing due to their long-wavelength absorptions and high emissions observed in these compounds. Additionally, the discovery of the related novel fluorophore, BOPHY, by Ziegler’s group in 2014 has also initiated numerous studies focusing on the development of these compounds. In the next chapter, this thesis presents a study of structures and photophysical of ADPMs and several aza-BODIPYs. Both ADPMs and aza-BODIPYs are fluorescent, and the aza-BODIPYs exhibit red shifted emissions relative to their ADPMs analogs. In the subsequent chapter, the synthesis and characterization of the first ADPM and aza-BODIPY complexes with ferrocene directly connected to the a-pyrrolic carbon is reported. The ferrocene units are electronically coupled to each other. DFT and TDDFT calculations are in agreement with the experimental data. In the last experimental chapter, the first organometallic BOPHY substituted with two ferrocene units is reported. The study revealed an unprecedented long-range metal-metal coupling between the ferrocene-centered oxidation waves. Advisors/Committee Members: Ziegler, Christopher (Advisor).

Subjects/Keywords: Chemistry

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APA (6^th Edition):

Chanawanno, K. (2016). Synthetic Studies of Re(CO)3 Bioconjugates, Azadipyrromethenes, and Ferrocene-modified Compounds. (Doctoral Dissertation). University of Akron. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=akron1475756546217373

Chicago Manual of Style (16^th Edition):

Chanawanno, Kullapa. “Synthetic Studies of Re(CO)3 Bioconjugates, Azadipyrromethenes, and Ferrocene-modified Compounds.” 2016. Doctoral Dissertation, University of Akron. Accessed February 16, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1475756546217373.

MLA Handbook (7^th Edition):

Chanawanno, Kullapa. “Synthetic Studies of Re(CO)3 Bioconjugates, Azadipyrromethenes, and Ferrocene-modified Compounds.” 2016. Web. 16 Feb 2019.

Vancouver:

Chanawanno K. Synthetic Studies of Re(CO)3 Bioconjugates, Azadipyrromethenes, and Ferrocene-modified Compounds. [Internet] [Doctoral dissertation]. University of Akron; 2016. [cited 2019 Feb 16]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1475756546217373.

Council of Science Editors:

Chanawanno K. Synthetic Studies of Re(CO)3 Bioconjugates, Azadipyrromethenes, and Ferrocene-modified Compounds. [Doctoral Dissertation]. University of Akron; 2016. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1475756546217373

University of Akron

12. Chippa, Mukesh K. Goal-seeking Decision Support System to Empower Personal Wellness Management.

Degree: PhD, Computer Engineering, 2016, University of Akron

URL: http://rave.ohiolink.edu/etdc/view?acc_num=akron1480413936639467

► Obesity has reached epidemic proportions globally, withmore than one billion adults overweight with at least threehundred million of them clinically obese; this is a major… (more)

▼ Obesity has reached epidemic proportions globally, withmore than one billion adults overweight with at least threehundred million of them clinically obese; this is a major contributor to the global burden of chronic disease and disability. This can also be associated with the rising health care costs; in the USA more than 75% of health care costs relate to chronic conditions such as Diabetes and Hypertension. While there are various technological advancements in fitness tracking devices such as Fitbit, and many employersoffer wellness programs, such programs and devices havenot been able to create societal scale transformations in the life style of the users. The challenge in keeping healthy people healthy and helping them to be intrinsically motivated to manage their own health is at the focus for this investigation on Personal Wellness Management. In this dissertation, this problem is presented as a decision making under uncertainty where the participant takes an action at discrete time steps and the outcome of the action is uncertain. The main focus is to formulate the decisionmaking problem in the Goal-seeking framework. To evaluate this formulation, the problem was also formulated in two classical sequential decision-making frameworks – Markov Decision Process and Partially Observable Markov Decision Process. The sequential decision-making frameworks allow us to computeoptimal policies to guide the participants' choice of actions. One of the major challenges in formulating the wellness management problem in these frameworks is the need for clinically validated data. While it is unrealistic to find such experimentally validateddata, it is also not clear that the models in fact capture all the inconstraints that are necessary to make the optimal solutions effective for the participant. The Goal-seeking framework offersan alternative approach that does not require explicit modeling of the participant or the environment. This dissertation presents a software system that is designed in the Goal-seeking framework. The architecture of the system isextensible. A modular subsystem that is useful to visualize exerciseperformance data that are gathered from a Kinect camera is described. Advisors/Committee Members: Sastry, Shivakumar (Advisor).

Subjects/Keywords: Computer Engineering; decision support system, personalized wellness management, Goal seeking paradigm, markov decision process, partially observable markov decision process

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APA (6^th Edition):

Chippa, M. K. (2016). Goal-seeking Decision Support System to Empower Personal Wellness Management. (Doctoral Dissertation). University of Akron. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=akron1480413936639467

Chicago Manual of Style (16^th Edition):

Chippa, Mukesh K. “Goal-seeking Decision Support System to Empower Personal Wellness Management.” 2016. Doctoral Dissertation, University of Akron. Accessed February 16, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1480413936639467.

MLA Handbook (7^th Edition):

Chippa, Mukesh K. “Goal-seeking Decision Support System to Empower Personal Wellness Management.” 2016. Web. 16 Feb 2019.

Vancouver:

Chippa MK. Goal-seeking Decision Support System to Empower Personal Wellness Management. [Internet] [Doctoral dissertation]. University of Akron; 2016. [cited 2019 Feb 16]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1480413936639467.

Council of Science Editors:

Chippa MK. Goal-seeking Decision Support System to Empower Personal Wellness Management. [Doctoral Dissertation]. University of Akron; 2016. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1480413936639467

University of Akron

13. Ghanbari, Elmira. Corrosion Behavior of Buried Pipeline in Presence of AC Stray Current in Controlled Environment.

Degree: PhD, Chemical Engineering, 2016, University of Akron

URL: http://rave.ohiolink.edu/etdc/view?acc_num=akron1475677625895234

► Cathodic protection (CP) and other corrosion mitigation strategies to preserve the integrity of pipelines are reported have failed in the presence of AC. This type… (more)

▼ Cathodic protection (CP) and other corrosion mitigation strategies to preserve the integrity of pipelines are reported have failed in the presence of AC. This type of failure is a threat for catastrophic failure and there is a lack of well-agreed mitigation criteria for it. AC grounding systems as well as "consensus" standards that recommend limits on the maximum allowable AC current density and critical ratios of AC and CP currents are the only available techniques for preventing AC corrosion. Unclear mechanism of AC corrosion is the main reason for the uncertainty on the CP criteria in the presence of AC interference. AC interference can occur by conduction or induction mechanism where pipelines share right of way with some interference sources such as a high-voltage transmission line typically fed by a high voltage line at 50 or 16.7 Hz frequency. The goal of this work is to understand the mechanism of AC induced corrosion by studying the effects of AC interference on steel at different DC potentials.This work consists of two phases. In the first phase, the influence of simultaneous presence of different AC and DC potentials on corrosion rate of API grade X65 pipeline steel by performing both electrochemical techniques and weight loss analysis in sodium chloride solution was studied. Experimental test results showed that the effect of AC is most pronounced near the open circuit potential; at more positive potentials the rates approach those of the ohmic drop/mass transport-limited DC rates. Correspondingly, at negative potentials the rates decrease. Surprisingly, at all potentials, it was found that the AC corrosion rate was equal to the average AC current in the system. The data generated from weight loss experiments were compared with the results from a model for AC corrosion that was developed using a modified Butler-Volmer approach. The model considers the anodic and cathodic Tafel slopes, diffusion limited oxygen transport, interfacial capacitance and solution resistance. The model was used to explain the observation that the AC corrosion rate was equal to the average AC current in the system. Both experimental and model results showed the importance of the solution resistance and interfacial capacitance on the rate of AC corrosion, especially at the frequency of 60Hz or higher.As it relates to the pipeline, one of the factors that influences this interfacial capacitance is the composition of the soil around the pipeline. For example, alkaline earth mineral content of the soil such as calcium or magnesium base minerals produce calcareous deposits on the coating fault. In the second phase of this project, the influence of the solution resistance and interfacial capacitance on the rate of AC corrosion was investigated in more detail. This was done by performing AC experiments in both extracted soil environment and soil simulated solution. Additionally, artificial scales were grown on X65 pipeline steel, which were then exposed to different AC and DC potentials in a soil-simulating solution. These films were… Advisors/Committee Members: Lillard, Robert Scott (Advisor).

Subjects/Keywords: Engineering; Materials Science; Chemical Engineering; AC interference on pipelines, corrosion, carbon steel, scale formation, interfacial capacitance

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APA (6^th Edition):

Ghanbari, E. (2016). Corrosion Behavior of Buried Pipeline in Presence of AC Stray Current in Controlled Environment. (Doctoral Dissertation). University of Akron. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=akron1475677625895234

Chicago Manual of Style (16^th Edition):

Ghanbari, Elmira. “Corrosion Behavior of Buried Pipeline in Presence of AC Stray Current in Controlled Environment.” 2016. Doctoral Dissertation, University of Akron. Accessed February 16, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1475677625895234.

MLA Handbook (7^th Edition):

Ghanbari, Elmira. “Corrosion Behavior of Buried Pipeline in Presence of AC Stray Current in Controlled Environment.” 2016. Web. 16 Feb 2019.

Vancouver:

Ghanbari E. Corrosion Behavior of Buried Pipeline in Presence of AC Stray Current in Controlled Environment. [Internet] [Doctoral dissertation]. University of Akron; 2016. [cited 2019 Feb 16]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1475677625895234.

Council of Science Editors:

Ghanbari E. Corrosion Behavior of Buried Pipeline in Presence of AC Stray Current in Controlled Environment. [Doctoral Dissertation]. University of Akron; 2016. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1475677625895234

University of Akron

14. Gruesen, Michael G. Towards an Ideal Execution Environment for Programmable Network Switches.

Degree: MS, Computer Science, 2016, University of Akron

URL: http://rave.ohiolink.edu/etdc/view?acc_num=akron1468834070

► Software Defined Networking (SDN) aims to create more powerful, intelligent networks that are managed using programmed switching devices. Applications for these SDN switches should be… (more)

Subjects/Keywords: Computer Science; Software Defined Networking; SDN; Execution environment; Virtual machine; Programmable network switch

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APA (6^th Edition):

Gruesen, M. G. (2016). Towards an Ideal Execution Environment for Programmable Network Switches. (Masters Thesis). University of Akron. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=akron1468834070

Chicago Manual of Style (16^th Edition):

Gruesen, Michael G. “Towards an Ideal Execution Environment for Programmable Network Switches.” 2016. Masters Thesis, University of Akron. Accessed February 16, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1468834070.

MLA Handbook (7^th Edition):

Gruesen, Michael G. “Towards an Ideal Execution Environment for Programmable Network Switches.” 2016. Web. 16 Feb 2019.

Vancouver:

Gruesen MG. Towards an Ideal Execution Environment for Programmable Network Switches. [Internet] [Masters thesis]. University of Akron; 2016. [cited 2019 Feb 16]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1468834070.

Council of Science Editors:

Gruesen MG. Towards an Ideal Execution Environment for Programmable Network Switches. [Masters Thesis]. University of Akron; 2016. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1468834070

University of Akron

15. Fisher, Ulia M. The Moderating Effect of Family Functioning on the Well-Being of Adolescent Immigrants Who Experience Acculturation Distress.

Degree: PhD, Counselor Education and Supervision-Marriage and Family Therapy, 2017, University of Akron

URL: http://rave.ohiolink.edu/etdc/view?acc_num=akron1491572323676755

► The purpose of this research study was to explore if family functioning as perceived by immigrant adolescents (N = 1849), moderates the relationship between felt… (more)

Subjects/Keywords: Psychotherapy; Immigration, Immigrant adolescents, Acculturation, Structural Family Therapy, Systemic therapy, Moderation model, Regression analysis

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APA (6^th Edition):

Fisher, U. M. (2017). The Moderating Effect of Family Functioning on the Well-Being of Adolescent Immigrants Who Experience Acculturation Distress. (Doctoral Dissertation). University of Akron. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=akron1491572323676755

Chicago Manual of Style (16^th Edition):

Fisher, Ulia M. “The Moderating Effect of Family Functioning on the Well-Being of Adolescent Immigrants Who Experience Acculturation Distress.” 2017. Doctoral Dissertation, University of Akron. Accessed February 16, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1491572323676755.

MLA Handbook (7^th Edition):

Fisher, Ulia M. “The Moderating Effect of Family Functioning on the Well-Being of Adolescent Immigrants Who Experience Acculturation Distress.” 2017. Web. 16 Feb 2019.

Vancouver:

Fisher UM. The Moderating Effect of Family Functioning on the Well-Being of Adolescent Immigrants Who Experience Acculturation Distress. [Internet] [Doctoral dissertation]. University of Akron; 2017. [cited 2019 Feb 16]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1491572323676755.

Council of Science Editors:

Fisher UM. The Moderating Effect of Family Functioning on the Well-Being of Adolescent Immigrants Who Experience Acculturation Distress. [Doctoral Dissertation]. University of Akron; 2017. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1491572323676755

University of Akron

16. Kere, Kiswendsida Jules. Life-Cycle Cost Comparison of Corrosion Management Strategies for Steel Structures.

Degree: MSin Engineering, Civil Engineering, 2017, University of Akron

URL: http://rave.ohiolink.edu/etdc/view?acc_num=akron1510185493551753

► Corrosion imposes the biggest threat to steel structural integrity and coating has been widely used as a corrosion protection for steel structures. As coating itself… (more)

Subjects/Keywords: Civil Engineering

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APA (6^th Edition):

Kere, K. J. (2017). Life-Cycle Cost Comparison of Corrosion Management Strategies for Steel Structures. (Masters Thesis). University of Akron. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=akron1510185493551753

Chicago Manual of Style (16^th Edition):

Kere, Kiswendsida Jules. “Life-Cycle Cost Comparison of Corrosion Management Strategies for Steel Structures.” 2017. Masters Thesis, University of Akron. Accessed February 16, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1510185493551753.

MLA Handbook (7^th Edition):

Kere, Kiswendsida Jules. “Life-Cycle Cost Comparison of Corrosion Management Strategies for Steel Structures.” 2017. Web. 16 Feb 2019.

Vancouver:

Kere KJ. Life-Cycle Cost Comparison of Corrosion Management Strategies for Steel Structures. [Internet] [Masters thesis]. University of Akron; 2017. [cited 2019 Feb 16]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1510185493551753.

Council of Science Editors:

Kere KJ. Life-Cycle Cost Comparison of Corrosion Management Strategies for Steel Structures. [Masters Thesis]. University of Akron; 2017. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1510185493551753

University of Akron

17. Xie, Yixuan. Synthesis And Characterization of Mannose-grafted Peptide-Like Polyesters.

Degree: MS, Polymer Science, 2016, University of Akron

URL: http://rave.ohiolink.edu/etdc/view?acc_num=akron1460383230

► Glycoproteins play significant roles in many physiological as well as pathological cellfunctions and they are potential for the development of therapeutics, diagnostics, andvaccines. However, the… (more)

Subjects/Keywords: Polymer Chemistry; Polymers; Glycoprotein; Polymer; Glycopolymer

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APA (6^th Edition):

Xie, Y. (2016). Synthesis And Characterization of Mannose-grafted Peptide-Like Polyesters. (Masters Thesis). University of Akron. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=akron1460383230

Chicago Manual of Style (16^th Edition):

Xie, Yixuan. “Synthesis And Characterization of Mannose-grafted Peptide-Like Polyesters.” 2016. Masters Thesis, University of Akron. Accessed February 16, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1460383230.

MLA Handbook (7^th Edition):

Xie, Yixuan. “Synthesis And Characterization of Mannose-grafted Peptide-Like Polyesters.” 2016. Web. 16 Feb 2019.

Vancouver:

Xie Y. Synthesis And Characterization of Mannose-grafted Peptide-Like Polyesters. [Internet] [Masters thesis]. University of Akron; 2016. [cited 2019 Feb 16]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1460383230.

Council of Science Editors:

Xie Y. Synthesis And Characterization of Mannose-grafted Peptide-Like Polyesters. [Masters Thesis]. University of Akron; 2016. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1460383230

University of Akron

18. Wang, Guannan. Synthesis And Characterization of Co-/Homo- Polyurethanes with Different Pendant-Functionalized Diols.

Degree: MS, Polymer Science, 2016, University of Akron

URL: http://rave.ohiolink.edu/etdc/view?acc_num=akron1460379423

► Polyurethanes (PUs) whose backbones are joined by urethane bond (-NHCOO-) are one of the widely studied synthetic polymers used as elastomers, coatings, fibers, adhesives, and… (more)

Subjects/Keywords: Polymers

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APA (6^th Edition):

Wang, G. (2016). Synthesis And Characterization of Co-/Homo- Polyurethanes with Different Pendant-Functionalized Diols. (Masters Thesis). University of Akron. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=akron1460379423

Chicago Manual of Style (16^th Edition):

Wang, Guannan. “Synthesis And Characterization of Co-/Homo- Polyurethanes with Different Pendant-Functionalized Diols.” 2016. Masters Thesis, University of Akron. Accessed February 16, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1460379423.

MLA Handbook (7^th Edition):

Wang, Guannan. “Synthesis And Characterization of Co-/Homo- Polyurethanes with Different Pendant-Functionalized Diols.” 2016. Web. 16 Feb 2019.

Vancouver:

Wang G. Synthesis And Characterization of Co-/Homo- Polyurethanes with Different Pendant-Functionalized Diols. [Internet] [Masters thesis]. University of Akron; 2016. [cited 2019 Feb 16]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1460379423.

Council of Science Editors:

Wang G. Synthesis And Characterization of Co-/Homo- Polyurethanes with Different Pendant-Functionalized Diols. [Masters Thesis]. University of Akron; 2016. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1460379423

University of Akron

19. Li, Tianyu. Synthesis and Characterization of Photoresponsive Polyesters for Improved Mechanical Properties and Erosion Properties.

Degree: MS, Polymer Science, 2016, University of Akron

URL: http://rave.ohiolink.edu/etdc/view?acc_num=akron1460381096

► Poly(lactic-co-glycolic acid) (PLGA) is a biodegradable copolymer with a tailored degradation rate, which has been widely used in biomaterials,such as screws, sutures and as the… (more)

Subjects/Keywords: Polymers

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APA (6^th Edition):

Li, T. (2016). Synthesis and Characterization of Photoresponsive Polyesters for Improved Mechanical Properties and Erosion Properties. (Masters Thesis). University of Akron. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=akron1460381096

Chicago Manual of Style (16^th Edition):

Li, Tianyu. “Synthesis and Characterization of Photoresponsive Polyesters for Improved Mechanical Properties and Erosion Properties.” 2016. Masters Thesis, University of Akron. Accessed February 16, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1460381096.

MLA Handbook (7^th Edition):

Li, Tianyu. “Synthesis and Characterization of Photoresponsive Polyesters for Improved Mechanical Properties and Erosion Properties.” 2016. Web. 16 Feb 2019.

Vancouver:

Li T. Synthesis and Characterization of Photoresponsive Polyesters for Improved Mechanical Properties and Erosion Properties. [Internet] [Masters thesis]. University of Akron; 2016. [cited 2019 Feb 16]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1460381096.

Council of Science Editors:

Li T. Synthesis and Characterization of Photoresponsive Polyesters for Improved Mechanical Properties and Erosion Properties. [Masters Thesis]. University of Akron; 2016. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1460381096

University of Akron

20. Defante, Adrian Perez. The Role of Water in Interfacial Interactions.

Degree: PhD, Polymer Science, 2016, University of Akron

URL: http://rave.ohiolink.edu/etdc/view?acc_num=akron1456413814

► The role of water is often overlooked in interfacial phenomena, but its presence influences many interfacial processes relevant to a number of scientific disciplines. Direct… (more)

▼ The role of water is often overlooked in interfacial phenomena, but its presence influences many interfacial processes relevant to a number of scientific disciplines. Direct force measurements have offered the most insight into underwater surface related phenomena such as adhesion, wetting, and friction, and have provided molecular descriptions to the physical interactions taking place at the contact interface. Although the insight from these experiments maybe true, there lacks direct molecular confirmation of the assertions interpreted from these force measurements. To address this, we have studied the impact of water on adhesion, friction, and wetting by using a suite of complementary surface sensitive techniques. By using non-linear sum frequency generation spectroscopy, we are able to probe surfaces at a molecular level and connect these chemical details to better understand interfacial phenomena. This thesis focuses on three studies to better understand the role of water in interfacial phenomena. For the first study, we focused on the contact of two hydrophobic surfaces in water. Here, we use surface sensitive sum frequency generation spectroscopy to directly probe the contact interface between hydrophobic poly-(dimethylsiloxane) (PDMS) and two hydrophobic surfaces (a self-assembled monolayer, OTS, and a polymer coating, PVNODC). We show that the interfacial structure for OTS and PVNODC are identical in dry contact but that they differ dramatically in wet contact. In water, the PVNODC surface partially rearranges at grain boundaries, trapping water at the contact interface leading to a 50% reduction in adhesion energy compared to OTS-PDMS contact. The Young-Dupr\'e equation, used extensively to calculate the thermodynamic work of adhesion, predicts no differences between the adhesion energy for these two hydrophobic surfaces, indicating a failure of this well-known equation when there is a heterogeneous contact.For the second study, we studied the role of water between two hydrophilic interfaces in sliding friction and adhesion. We achieve this by adsorbing cationic surfactant, cetyl trimethyl ammonium bromide (CTAB), on two hydrophobic surfaces, PDMS and a self assembled monolayer. Using surface sensitive sum frequency generation spectroscopy, we highlight a strongly coordinated ice-like water layer confined between two surfactant covered hydrophobic surfaces under hydration pressures. Such strongly coordinated water structure, that reduces the sliding friction, forms past the surfactant concentration needed for monolayer coverage. In addition, the surprising observance of a highly coordinated ice like layer of water between these two surfaces presents opportunities for developing a theoretical framework to the molecular behavior of confined water.For the third study, we investigate underwater adhesion and friction for a hydrophobic lens in contact with plasma treated surfaces of different wettability. From these measurements, we aimed to guide the interfacial design of underwater adhesives by systematically… Advisors/Committee Members: Dhinojwala, Ali (Advisor), Becker, Matthew (Advisor), Tsige, Mesfin (Committee Chair).

Subjects/Keywords: Polymers; Physical Chemistry; Polymer Science, Interfacial Phenomena, Adhesion, Sum Frequency Generation Spectroscopy

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APA (6^th Edition):

Defante, A. P. (2016). The Role of Water in Interfacial Interactions. (Doctoral Dissertation). University of Akron. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=akron1456413814

Chicago Manual of Style (16^th Edition):

Defante, Adrian Perez. “The Role of Water in Interfacial Interactions.” 2016. Doctoral Dissertation, University of Akron. Accessed February 16, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1456413814.

MLA Handbook (7^th Edition):

Defante, Adrian Perez. “The Role of Water in Interfacial Interactions.” 2016. Web. 16 Feb 2019.

Vancouver:

Defante AP. The Role of Water in Interfacial Interactions. [Internet] [Doctoral dissertation]. University of Akron; 2016. [cited 2019 Feb 16]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1456413814.

Council of Science Editors:

Defante AP. The Role of Water in Interfacial Interactions. [Doctoral Dissertation]. University of Akron; 2016. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1456413814

University of Akron

21. Zhao, Jiuzhou. Convective Assembly of Rod-shaped Melanosome in Dilute Polymer Solution.

Degree: MS, Polymer Science, 2016, University of Akron

URL: http://rave.ohiolink.edu/etdc/view?acc_num=akron1462211308

► Bird feathers have developed most diverse structural colorations. Many of them are produced by orderly packing melanosomes (submicron melanin-filled organelles) structures. These melanosomes come in… (more)

Subjects/Keywords: Materials Science; Self-assemble, melanosome, polymer dilute solution, coffee-ring

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APA (6^th Edition):

Zhao, J. (2016). Convective Assembly of Rod-shaped Melanosome in Dilute Polymer Solution. (Masters Thesis). University of Akron. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=akron1462211308

Chicago Manual of Style (16^th Edition):

Zhao, Jiuzhou. “Convective Assembly of Rod-shaped Melanosome in Dilute Polymer Solution.” 2016. Masters Thesis, University of Akron. Accessed February 16, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1462211308.

MLA Handbook (7^th Edition):

Zhao, Jiuzhou. “Convective Assembly of Rod-shaped Melanosome in Dilute Polymer Solution.” 2016. Web. 16 Feb 2019.

Vancouver:

Zhao J. Convective Assembly of Rod-shaped Melanosome in Dilute Polymer Solution. [Internet] [Masters thesis]. University of Akron; 2016. [cited 2019 Feb 16]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1462211308.

Council of Science Editors:

Zhao J. Convective Assembly of Rod-shaped Melanosome in Dilute Polymer Solution. [Masters Thesis]. University of Akron; 2016. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1462211308

University of Akron

22. Walker, Ruth Virginia. Expanding Our Conceptualization of Ageism: Moving Toward an Intersectional Lifespan Approach.

Degree: PhD, Psychology-Adult Development and Aging, 2016, University of Akron

URL: http://rave.ohiolink.edu/etdc/view?acc_num=akron1467905345

► Ageism is a form of age-based discrimination most frequently studied in terms of unequal treatment toward older adults (Butler, 1969; 2005). Ageism is unique from… (more)

Subjects/Keywords: Gerontology; Psychology; Sociology; Social Research; Ageism; phenomenology; lifespan development; qualitative methodology; interviews; story circles; sexism; intersectionality; gender; aging; reverse ageism; ageing

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APA (6^th Edition):

Walker, R. V. (2016). Expanding Our Conceptualization of Ageism: Moving Toward an Intersectional Lifespan Approach. (Doctoral Dissertation). University of Akron. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=akron1467905345

Chicago Manual of Style (16^th Edition):

Walker, Ruth Virginia. “Expanding Our Conceptualization of Ageism: Moving Toward an Intersectional Lifespan Approach.” 2016. Doctoral Dissertation, University of Akron. Accessed February 16, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1467905345.

MLA Handbook (7^th Edition):

Walker, Ruth Virginia. “Expanding Our Conceptualization of Ageism: Moving Toward an Intersectional Lifespan Approach.” 2016. Web. 16 Feb 2019.

Vancouver:

Walker RV. Expanding Our Conceptualization of Ageism: Moving Toward an Intersectional Lifespan Approach. [Internet] [Doctoral dissertation]. University of Akron; 2016. [cited 2019 Feb 16]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1467905345.

Council of Science Editors:

Walker RV. Expanding Our Conceptualization of Ageism: Moving Toward an Intersectional Lifespan Approach. [Doctoral Dissertation]. University of Akron; 2016. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1467905345

University of Akron

23. Kozee, Troy. Simplifying Q&A Systems with Topic Modelling.

Degree: MS, Computer Science, 2017, University of Akron

URL: http://rave.ohiolink.edu/etdc/view?acc_num=akron1514592530510281

► Abstract Question answering (Q&A) systems have made great progress in recent years, but that progress has also required enormous resources in terms of computation and… (more)

Subjects/Keywords: Computer Science; Information Retrieval; question-answer; natural language processing; topic modelling; lucene

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APA (6^th Edition):

Kozee, T. (2017). Simplifying Q&A Systems with Topic Modelling. (Masters Thesis). University of Akron. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=akron1514592530510281

Chicago Manual of Style (16^th Edition):

Kozee, Troy. “Simplifying Q&A Systems with Topic Modelling.” 2017. Masters Thesis, University of Akron. Accessed February 16, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1514592530510281.

MLA Handbook (7^th Edition):

Kozee, Troy. “Simplifying Q&A Systems with Topic Modelling.” 2017. Web. 16 Feb 2019.

Vancouver:

Kozee T. Simplifying Q&A Systems with Topic Modelling. [Internet] [Masters thesis]. University of Akron; 2017. [cited 2019 Feb 16]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1514592530510281.

Council of Science Editors:

Kozee T. Simplifying Q&A Systems with Topic Modelling. [Masters Thesis]. University of Akron; 2017. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1514592530510281

University of Akron

24. Houser, Shelley A, PhD. Key Steps to Reading Success: Measuring the Impact of Participation in a Family/School Literacy Partnership Program on the Foundational Literacy Skills of Kindergarteners.

Degree: PhD, Elementary Education-Literacy, 2017, University of Akron

URL: http://rave.ohiolink.edu/etdc/view?acc_num=akron1512046619521825

► Substantial research has revealed several early literacy skills are predictive of later reading achievement. The current quasi-experimental study considered a ten-week family/school literacy partnership program… (more)

Subjects/Keywords: Education; Families and Family Life; Literacy; early literacy, reading achievement, kindergarten students, family-school literacy partnership, Measures of Academic Progress for Primary Grades, Reading Improvement and Monitoring Plan, families, quasi-experimental

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APA (6^th Edition):

Houser, Shelley A, P. (2017). Key Steps to Reading Success: Measuring the Impact of Participation in a Family/School Literacy Partnership Program on the Foundational Literacy Skills of Kindergarteners. (Doctoral Dissertation). University of Akron. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=akron1512046619521825

Chicago Manual of Style (16^th Edition):

Houser, Shelley A, PhD. “Key Steps to Reading Success: Measuring the Impact of Participation in a Family/School Literacy Partnership Program on the Foundational Literacy Skills of Kindergarteners.” 2017. Doctoral Dissertation, University of Akron. Accessed February 16, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1512046619521825.

MLA Handbook (7^th Edition):

Houser, Shelley A, PhD. “Key Steps to Reading Success: Measuring the Impact of Participation in a Family/School Literacy Partnership Program on the Foundational Literacy Skills of Kindergarteners.” 2017. Web. 16 Feb 2019.

Vancouver:

Houser, Shelley A P. Key Steps to Reading Success: Measuring the Impact of Participation in a Family/School Literacy Partnership Program on the Foundational Literacy Skills of Kindergarteners. [Internet] [Doctoral dissertation]. University of Akron; 2017. [cited 2019 Feb 16]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1512046619521825.

Council of Science Editors:

Houser, Shelley A P. Key Steps to Reading Success: Measuring the Impact of Participation in a Family/School Literacy Partnership Program on the Foundational Literacy Skills of Kindergarteners. [Doctoral Dissertation]. University of Akron; 2017. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1512046619521825

University of Akron

25. Saha, Aparna, Saha. CONTROL OF MULTILEVEL CONVERTERS FOR VOLTAGE BALANCING AND FAULT-TOLERANT OPERATIONS.

Degree: PhD, Electrical Engineering, 2017, University of Akron

URL: http://rave.ohiolink.edu/etdc/view?acc_num=akron1512661551448008

► Multilevel converters (MLC) have been widely accepted in recent times for high power and medium to high voltage applications. Developments in semiconductor technology and commercial… (more)

▼ Multilevel converters (MLC) have been widely accepted in recent times for high power and medium to high voltage applications. Developments in semiconductor technology and commercial availability of high power switches have made two-level voltage-source converters (VSC) feasible for high power applications; however, for high voltage and high power systems, instead of using switches with high voltage ratings, it is beneficial to connect multiple low-voltage rated switches in series in multilevel approach. Compared to conventional two-level VSCs, MLCs have better capability to (i) lower harmonic distortion of the AC-side waveforms, (ii) decrease the dv/dt switching stresses, and (iii) reduce the switching losses. Moreover, MLCs are easily configurable with multiple renewable energy sources such as solar power, wind power, and fuel cells. Among diverse MLC topologies, diode-clamped converter (DCC) configuration is analyzed in this dissertation. The salient feature of DCC topology is that all three phases of the converter share a common DC bus voltage which minimizes total capacitor requirements. However, DCCs have their own limitations such as the voltage balancing among the converter cells and control complexity. Due to the series connection of the dc-capacitor cells, the voltage sharing among the cells deteriorates during certain operating conditions. To have increased number of voltage levels at the output, DCCs require a higher number of power semiconductor switches and associated electronic components. That means multilevel DCCs are more difficult to control and more expensive than two-level VSCs. There is also a much higher possibility of a device failing. To improve the reliability and performance stability of the overall converter system, an easily configurable controller with a fault-tolerant capability is essential. This dissertation presents the development of generalized control algorithms and a novel converter topology to address the inherent technical issues associated with the higher-level DCC system. A unique space-vector pulse width modulation (SVPWM) based controller is developed for 3-level and 5-level DCC with minimal switching operation that ensures voltage balancing and minimizes switching loss. The effectiveness of the proposed SVPWM controller is further validated through multilevel DCC operations at high modulation index without any additional balancing circuitry. The fault-tolerant capabilities of multilevel DCC are also improved by using a new SVPWM controller, which ensures continuous operation under certain device failures. Moreover, a novel three-phase multilevel DCC topology is proposed that reduces the power electronic device counts remarkably with the increase of output voltage levels while maintaining control flexibility. The developed control algorithms are implemented in the DCC topology and their operations are experimentally verified. Advisors/Committee Members: Sozer , Yilmaz (Advisor).

Subjects/Keywords: Electrical Engineering; Multilevel Converter, Space Vector Pulse Width Modulation, SVPWM, Diode-Clamped Converter, Voltage Balancing, Fault-tolerant, New multilevel topology, Minimum loss SVPWM

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APA (6^th Edition):

Saha, Aparna, S. (2017). CONTROL OF MULTILEVEL CONVERTERS FOR VOLTAGE BALANCING AND FAULT-TOLERANT OPERATIONS. (Doctoral Dissertation). University of Akron. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=akron1512661551448008

Chicago Manual of Style (16^th Edition):

Saha, Aparna, Saha. “CONTROL OF MULTILEVEL CONVERTERS FOR VOLTAGE BALANCING AND FAULT-TOLERANT OPERATIONS.” 2017. Doctoral Dissertation, University of Akron. Accessed February 16, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1512661551448008.

MLA Handbook (7^th Edition):

Saha, Aparna, Saha. “CONTROL OF MULTILEVEL CONVERTERS FOR VOLTAGE BALANCING AND FAULT-TOLERANT OPERATIONS.” 2017. Web. 16 Feb 2019.

Vancouver:

Saha, Aparna S. CONTROL OF MULTILEVEL CONVERTERS FOR VOLTAGE BALANCING AND FAULT-TOLERANT OPERATIONS. [Internet] [Doctoral dissertation]. University of Akron; 2017. [cited 2019 Feb 16]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1512661551448008.

Council of Science Editors:

Saha, Aparna S. CONTROL OF MULTILEVEL CONVERTERS FOR VOLTAGE BALANCING AND FAULT-TOLERANT OPERATIONS. [Doctoral Dissertation]. University of Akron; 2017. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1512661551448008

University of Akron

26. Makita, Yuta. Effect of stereoregularity on local molecular dynamics of hydrogenated polynorbornenes as studied by solid-state NMR.

Degree: MS, Polymer Science, 2017, University of Akron

URL: http://rave.ohiolink.edu/etdc/view?acc_num=akron1512744939777343

► Recently, a study on stereospecific ring-opening metathesis polymerization has been conducted on norbornenes making the synthesis and the study of hydrogenated polynorbornene (hPNB) stereoisomers possible.… (more)

▼ Recently, a study on stereospecific ring-opening metathesis polymerization has been conducted on norbornenes making the synthesis and the study of hydrogenated polynorbornene (hPNB) stereoisomers possible. The stereoregular hPNBs are unique as the tacticity is defined differently compared to polypropylene or polystyrene and the stereoregular hPNB are semicrystalline with an all-trans configuration at room temperature. In addition, the thermal and structural behavior was unique as atactic-hPNB observed a reversible crystal-crystal phase transition between monoclinic and pseudohexagonal while isotactic-hPNB observed an irreversible crystal-crystal phase transition where the conformation changed to gauche-trans-gauche and syndiotactic-hPNB showed no crystal-crystal transition.The molecular dynamics of atactic- syndiotactic- and isotactic-hPNBs under various temperatures below melting temperature were studied using center-band only detection of exchange (CODEX) and chemical shift anisotropy lineshape analysis. As a result, it was shown that syndiotactic-hPNB observed no molecular dynamics while both atactic- and isotactic-hPNB observed slow local motion in the pentane ring that corresponded to changes in the puckered conformation below the crystal-crystal transition temperature (Tcc). The amplitude of motion for atactic-hPNB was shown to be around 10° – 20° while the amplitude of motion for isotactic-hPNB was shown to be 12° – 28°. The larger amplitude for the local motion of isotactic-hPNB suggested that the slow dynamics influenced the change in conformation in the crystal structure of isotactic-hPNB around Tcc. On the contrary the small amplitude motion of atactic-hPNB, along with the loose crystal packing structure caused by the atactic nature of the polymer, induced a larger amplitude rotational motion around a central axis above Tcc. The results suggested that the amplitude of the slow local motion influenced the behavior of Tcc experienced by stereoregular hPNBs. Furthermore, the unique dynamic geometry (the coexistence of a rotational motion and local fluctuation motion) of atactic-hPNB above Tcc correlated well with the increase in long period from the ultrasmall X-ray scattering data. The study of the molecular dynamics of stereoregular hPNBs provided unique insight to the relationship between local dynamics, structure, and phase transition, elucidating good macroscopic properties for the hPNBs. Advisors/Committee Members: Miyoshi, Toshikazu (Advisor).

Subjects/Keywords: Polymers

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APA (6^th Edition):

Makita, Y. (2017). Effect of stereoregularity on local molecular dynamics of hydrogenated polynorbornenes as studied by solid-state NMR. (Masters Thesis). University of Akron. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=akron1512744939777343

Chicago Manual of Style (16^th Edition):

Makita, Yuta. “Effect of stereoregularity on local molecular dynamics of hydrogenated polynorbornenes as studied by solid-state NMR.” 2017. Masters Thesis, University of Akron. Accessed February 16, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1512744939777343.

MLA Handbook (7^th Edition):

Makita, Yuta. “Effect of stereoregularity on local molecular dynamics of hydrogenated polynorbornenes as studied by solid-state NMR.” 2017. Web. 16 Feb 2019.

Vancouver:

Makita Y. Effect of stereoregularity on local molecular dynamics of hydrogenated polynorbornenes as studied by solid-state NMR. [Internet] [Masters thesis]. University of Akron; 2017. [cited 2019 Feb 16]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1512744939777343.

Council of Science Editors:

Makita Y. Effect of stereoregularity on local molecular dynamics of hydrogenated polynorbornenes as studied by solid-state NMR. [Masters Thesis]. University of Akron; 2017. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1512744939777343

University of Akron

27. Seeley, Marisa A. Interactions of Additives on Surfaces via Temperature Programmed Desorption.

Degree: MSin Engineering, Chemical Engineering, 2017, University of Akron

URL: http://rave.ohiolink.edu/etdc/view?acc_num=akron151394915585005

► Motion under load between any two surfaces that are in contact with each other most likely will develop damage. Lubricants are used between two surfaces… (more)

Subjects/Keywords: Chemical Engineering; Engineering; Temperature Programmed Desorption; TPD; lubrication; tribology; friction; wear; desorption; kinetics; reaction mechanisms

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APA (6^th Edition):

Seeley, M. A. (2017). Interactions of Additives on Surfaces via Temperature Programmed Desorption. (Masters Thesis). University of Akron. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=akron151394915585005

Chicago Manual of Style (16^th Edition):

Seeley, Marisa A. “Interactions of Additives on Surfaces via Temperature Programmed Desorption.” 2017. Masters Thesis, University of Akron. Accessed February 16, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron151394915585005.

MLA Handbook (7^th Edition):

Seeley, Marisa A. “Interactions of Additives on Surfaces via Temperature Programmed Desorption.” 2017. Web. 16 Feb 2019.

Vancouver:

Seeley MA. Interactions of Additives on Surfaces via Temperature Programmed Desorption. [Internet] [Masters thesis]. University of Akron; 2017. [cited 2019 Feb 16]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron151394915585005.

Council of Science Editors:

Seeley MA. Interactions of Additives on Surfaces via Temperature Programmed Desorption. [Masters Thesis]. University of Akron; 2017. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron151394915585005

University of Akron

28. Kurtoglu, Abdullah. Development of an Energy Efficient WSN for Monitoring High Voltage Transmission Towers.

Degree: MSin Engineering, Electrical Engineering, 2017, University of Akron

URL: http://rave.ohiolink.edu/etdc/view?acc_num=akron1513956888684835

► In this thesis, Wireless Sensor Networks (WSN) using ZigBee and LoRaWan platforms are designed for monitoring High Voltage Transmission Towers (HVTTs). Four WSN designs, one… (more)

Subjects/Keywords: Electrical Engineering

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APA (6^th Edition):

Kurtoglu, A. (2017). Development of an Energy Efficient WSN for Monitoring High Voltage Transmission Towers. (Masters Thesis). University of Akron. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=akron1513956888684835

Chicago Manual of Style (16^th Edition):

Kurtoglu, Abdullah. “Development of an Energy Efficient WSN for Monitoring High Voltage Transmission Towers.” 2017. Masters Thesis, University of Akron. Accessed February 16, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1513956888684835.

MLA Handbook (7^th Edition):

Kurtoglu, Abdullah. “Development of an Energy Efficient WSN for Monitoring High Voltage Transmission Towers.” 2017. Web. 16 Feb 2019.

Vancouver:

Kurtoglu A. Development of an Energy Efficient WSN for Monitoring High Voltage Transmission Towers. [Internet] [Masters thesis]. University of Akron; 2017. [cited 2019 Feb 16]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1513956888684835.

Council of Science Editors:

Kurtoglu A. Development of an Energy Efficient WSN for Monitoring High Voltage Transmission Towers. [Masters Thesis]. University of Akron; 2017. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1513956888684835

University of Akron

29. Almonbhi, Ali O. Effectiveness of Waterproofing Membranes for Precast Prestressed Concrete Adjacent Box-Beam Bridges.

Degree: PhD, Civil Engineering, 2018, University of Akron

URL: http://rave.ohiolink.edu/etdc/view?acc_num=akron1522880974567767

► Bridge designs frequently employ precast concrete box beams, with adjacent beams connected using grouted keyways. Failure at these joints leads to water leakage and corrosion… (more)

▼ Bridge designs frequently employ precast concrete box beams, with adjacent beams connected using grouted keyways. Failure at these joints leads to water leakage and corrosion in reinforcing bars/strands, resulting in severe damage to concrete elements and reducing the bridge’s lifespan. This dissertation investigates the causes for the ineffectiveness of waterproofing membranes in preventing leakage at joints of adjacent box beams.Testing of five commercially available waterproofing membranes showed low tensile and shear strength and high deformability, with membranes exhibiting large elongation and no leakage. Adhesion tests showed limited peel strength. Different practices such as use of primer, sealant, and direct heat were also investigated. Sealant provided better bonding than primer, and heating yielded no improvement in bond strength. All membranes showed low punching resistance but could resist loads up to 1,200 lb in wheel load tests without being damaged. Prestress losses were calculated for construction scenarios for concrete box beams of ages varying from 7 to 180 days at time of deck placement. The difference in prestress losses have an inverse relationship with concrete age at the time of deck placement, while an inverse relationship exists between the age of concrete of prestressed box beams at the time of deck placement and the differential deflections. Spans having different lengths were found to have a proportional relationship to the difference in prestress losses and differential deflections. While differential prestress losses at different concrete ages contribute to joint cracks between adjacent box beams, losses may not be sufficient to rupture the membranes. The maximum differential deflection between adjacent box beams with different concrete ages may cause cracking in the keyways but is likely to be negligible compared to the ability of the membrane to stretch. In visits to an existing bridge and a new bridge underconstruction, deficiencies were noted in the implementation of waterproofing membranes: inadequate specifications and ineffective inspection, absence of membranes on portions of the existing bridge, and protrusions/debris on the concrete deck of the new bridge prior to membrane installation. This study recommends that waterproofing membranes continue to be used in bridges and provides suggestions to improve their implementation. Advisors/Committee Members: Patnaik, Anil (Advisor).

Subjects/Keywords: Civil Engineering; Bridge, Box Beams bridge, Longitudinal cracks, Water leakage, Differential deflections, Waterproofing, Membranes, Precast concrete, Prestressed concrete, Prestress losses, Construction of Waterproofing Membranes

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Almonbhi, A. O. (2018). Effectiveness of Waterproofing Membranes for Precast Prestressed Concrete Adjacent Box-Beam Bridges. (Doctoral Dissertation). University of Akron. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=akron1522880974567767

Chicago Manual of Style (16^th Edition):

Almonbhi, Ali O. “Effectiveness of Waterproofing Membranes for Precast Prestressed Concrete Adjacent Box-Beam Bridges.” 2018. Doctoral Dissertation, University of Akron. Accessed February 16, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1522880974567767.

MLA Handbook (7^th Edition):

Almonbhi, Ali O. “Effectiveness of Waterproofing Membranes for Precast Prestressed Concrete Adjacent Box-Beam Bridges.” 2018. Web. 16 Feb 2019.

Vancouver:

Almonbhi AO. Effectiveness of Waterproofing Membranes for Precast Prestressed Concrete Adjacent Box-Beam Bridges. [Internet] [Doctoral dissertation]. University of Akron; 2018. [cited 2019 Feb 16]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1522880974567767.

Council of Science Editors:

Almonbhi AO. Effectiveness of Waterproofing Membranes for Precast Prestressed Concrete Adjacent Box-Beam Bridges. [Doctoral Dissertation]. University of Akron; 2018. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1522880974567767

University of Akron

30. Li, Junhong, Li. Pier Streamlining as a Bridge Local Scour Countermeasure and the Underlying Scour Mechanism.

Degree: PhD, Civil Engineering, 2018, University of Akron

URL: http://rave.ohiolink.edu/etdc/view?acc_num=akron1518565785864439

► Bridge local scour has long been identified as the most critical cause to bridge failures. Countermeasures that are commonly used nowadays still have disadvantages to… (more)

▼ Bridge local scour has long been identified as the most critical cause to bridge failures. Countermeasures that are commonly used nowadays still have disadvantages to some extent. This work is among one of the ongoing efforts to explore reliable alternatives. Inspired by the streamlined body of boxfish and blue shark, this study introduced streamlining features to the bridge piers in order to reduce the erosive forces locally. Based on the excess shear stress criteria, the Reynolds-Averaged Navier Stokes (RANS) numerical model was employed to optimize the streamlined features through parametric studies. The maximum bed shear stress around the optimal streamlined pier was shown to be reduced by ~34% as compared to that around a non-streamlined pier. Further simulation using the advanced Detached Eddy Simulation (DES) model revealed that the streamlined pier also helped reduce the locally turbulence dynamics, which played a significant role in local scour. A set of small-scale flume tests were then conducted in the laboratory to characterize the flow physics and scour behavior of uniform Ottawa sand around piers with various streamlined extents. The experimental results further confirmed the effectiveness of pier streamlining in scour reduction. The maximum scour depth around the streamlined pier was reduced by ~66% as compared to that around a non-streamlined pier. Through monitoring the pore pressure response within sand, the role of vortex-induced excess pore pressure that plays in the scour mechanism was discussed. The vortex-induced excess pore pressure also helped to partially account for an interestingly counterintuitive observation from an independent experiment: the local scour resistance was a slightly decreasing function of the granular bulk density. Finally, a CFD-DEM (Discrete Element Model) two-way coupled model was established to simulate the scour behavior of uniform spherical particles around an oblong pier. The two-phase model successfully captured the characteristic local scour behaviors, and thus may serve as a platform of great potential to further investigate the scour mechanism at microscale in the future. Tremendous efforts were also made to review applications of the emerging two-phase numerical models to the broad flow–induced erosion problems. Advisors/Committee Members: Tao, Junliang (Advisor).

Subjects/Keywords: Civil Engineering; Bridge local scour; scour countermeasure; streamlined pier; CFD simulation; RANS model; DES model; CFD-DEM two-way coupled model; two-phase model; flume test; coherent dynamics; horseshoe vortex; pore pressure; miniature pressure transducer

Record Details Similar Records Cite « Share

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Li, Junhong, L. (2018). Pier Streamlining as a Bridge Local Scour Countermeasure and the Underlying Scour Mechanism. (Doctoral Dissertation). University of Akron. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=akron1518565785864439

Chicago Manual of Style (16^th Edition):

Li, Junhong, Li. “Pier Streamlining as a Bridge Local Scour Countermeasure and the Underlying Scour Mechanism.” 2018. Doctoral Dissertation, University of Akron. Accessed February 16, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1518565785864439.

MLA Handbook (7^th Edition):

Li, Junhong, Li. “Pier Streamlining as a Bridge Local Scour Countermeasure and the Underlying Scour Mechanism.” 2018. Web. 16 Feb 2019.

Vancouver:

Li, Junhong L. Pier Streamlining as a Bridge Local Scour Countermeasure and the Underlying Scour Mechanism. [Internet] [Doctoral dissertation]. University of Akron; 2018. [cited 2019 Feb 16]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1518565785864439.

Council of Science Editors:

Li, Junhong L. Pier Streamlining as a Bridge Local Scour Countermeasure and the Underlying Scour Mechanism. [Doctoral Dissertation]. University of Akron; 2018. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1518565785864439

Open Access Theses and Dissertations