Limit your search
Search Constraints
Number of results to display per page
Search Results
-
- Description:
- This dissertation presents a comprehensive study of thin-film LiMn2O4 (LMO) cathodes applied in lithium ion batteries (LIBs). The primary aim was to establish fundamental understanding of the relationship between interfacial LMO chemistry/electrochemistry and its detrimental drawback, i.e. fast capacity fade over long term cycling, and then develop effective mitigation methods....
- Keyword:
- Surface coating, Thin film, Lithium ion battery, LiMn2O4, Interfacial electrochemistry, and Capacity loss
- Subject:
- Nanotechnology, Materials Science, and Energy
- Creator:
- Yu, Xiankai
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2019-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:14706 and etdadmin_upload_667791
-
- Description:
- The goal of this thesis is to design practical algorithms for nonlinear optimization in the case where the objective function is deterministic or stochastic. Problems of this nature arise in many applications including machine learning and image processing. The thesis is divided into four main chapters. Chapters \ref{chap:Inexact}, \ref{chap:Adasample} and...
- Subject:
- Industrial engineering and Operations research
- Creator:
- Bollapragada, Vijaya Raghavendra
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2019-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:14659 and etdadmin_upload_662754
-
- Description:
- For much of the twentieth-century, English-language music scholars were reticent to speculate about the origins of music. In recent years, however, the study of music’s evolutionary origins has been revitalized. Resonating Subjects brings a critical-historical perspective to this renewed convergence of music studies and evolutionary science. Through close examinations of...
- Keyword:
- Edmund Gurney, Charles Darwin, Herbert Spencer, evolutionary musicology, Victorian music culture, and emotion
- Subject:
- Music theory and Music history
- Creator:
- Piilonen, Miriam
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2019-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:14771 and etdadmin_upload_679879
-
- Description:
- Lubrication is the most means for sliding interface failure prevention because it helps separate two interacting surfaces, reduce asperity contacts and thus extend the working life of the parts. Improving the tribological performance of lubricated interfaces is a challenging work, as several influence factors are involved, such as coating, plasticity,...
- Keyword:
- Rotary engine, Elastohydrodynamic lubrication, Roller contact, Apex seal, and Tribology
- Subject:
- Mechanical engineering
- Creator:
- Liu, Zhong
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Modified:
- 06/05/2020
- Date Created:
- 2019-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_684009 and http://dissertations.umi.com/northwestern:14792
-
- Description:
- Extensive study of nanomaterial chemical and optical properties has enabled their integration into a variety of applications. However, less thoroughly investigated are the heat generation and dissipation processes of nanomaterials following optical excitation. These phenomena are of immense importance as thermal energy can distort a material’s structure, which has profound...
- Keyword:
- spectroscopy, quantum dots, nanoparticles, and plasmonics
- Subject:
- Chemistry
- Creator:
- Kirschner, Matthew S
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2019-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:14600 and etdadmin_upload_661149
-
- Description:
- Prostate cancer (PCa) is the most common non-cutaneous cancer among U.S. men. Lack of effective treatments for advanced disease make it a significant public health concern. However, PCa’s long natural history makes it an excellent target for prevention approaches that reduce overtreatment of indolent disease, treatment related morbidity, and mortality....
- Keyword:
- SELECT, Extracellular matrix, Prostate cancer, Reactive Oxygen Species, Organoids, and Fatty Acid Oxidation
- Subject:
- Molecular biology, Biology, and Cellular biology
- Creator:
- Njoroge, Rose Nyawira
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2018-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:14428 and etdadmin_upload_623433
-
- Description:
- This dissertation considers a periodically-forced 1-D Langevin equation that possesses two stable periodic solutions in the absence of noise. We aim at answering the question: is there a most likely noise-induced transition path between these periodic solutions that allows one to identify a preferred phase of the forcing when the...
- Subject:
- Applied mathematics
- Creator:
- Chen, Yuxin
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2019-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:14754 and etdadmin_upload_677031
-
- Description:
- Global energy demand is increasingly rapidly in today’s modern world with increasing living standards all around the world. As global energy demand rises, energy efficiency has never been more crucial and that the improvement of tribological systems is critical to the progress of the global future. A large part of...
- Keyword:
- Pocket, Misalignment, Lubrication, Texture, Journal Bearing, and Tribology
- Subject:
- Mechanical engineering
- Creator:
- Gu, Thomas
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2019-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_685145 and http://dissertations.umi.com/northwestern:14805
-
- Description:
- Modeling human language is at the very frontier of machine learning and artificial intelligence. Statistical language models are probabilistic models that assign probabilities to sequences of words. For example, topic models are frequently used text-mining tools to organize a vast set of unstructured documents by exploring their theme structure. More...
- Keyword:
- definition modeling, statistical language models, deep learning, nonparametric Bayesian model, community detection, and neural language models
- Subject:
- Artificial intelligence, Statistics, and Computer science
- Creator:
- Zhu, Ruimin
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2019-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_685529 and http://dissertations.umi.com/northwestern:14809
-
Quantum Teleportation of an Electron Spin State Mediated by a Photodriven Electron Transfer Reaction
- Description:
- This thesis describes a novel demonstration of quantum teleportation, a protocol within the broader field of quantum information science, carried out by an electron transfer reaction within a molecular system. As described in Chapter 1, quantum information science has potential impacts in computation, communication, and cryptography. This field relies on...
- Keyword:
- molecular spintronics, physical organic chemistry, photochemistry, and quantum information
- Subject:
- Chemistry
- Creator:
- Rugg, Brandon Kenneth
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2019-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:14549 and etdadmin_upload_647075
-
- Description:
- Design problems are highly ill-structured, having “ambiguous specifications of goals, no determined solution path, and the need to integrate multiple knowledge domains” (Jonassen, 2000, p. 80). Design problems are generated by stakeholders to meet needs that exist outside of the classroom (Simon, 1973; Jonassen, 2000)—this is in contrast to most...
- Keyword:
- Iteration, Project-based Learning, Design, Design-based Research, and Coaching
- Subject:
- Education, Design, and Educational technology
- Creator:
- Rees Lewis, Daniel George
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2018-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:14426 and etdadmin_upload_623161
-
- Description:
- Semiconductor nanowires, such as group IV and III-V nanowires, shows distinct electrical, optical and mechanical properties from their bulk counterparts due to their nanoscale size and 1-D morphology. For example, the quantum confinement effect modulates the band gap of a semiconductor nanowire when its diameter approaches or below the exciton...
- Keyword:
- atom-probe tomography, doping, nanowire, silicon, CVD, and strain
- Subject:
- Nanotechnology, Nanoscience, and Materials Science
- Creator:
- Sun, Zhiyuan
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2018-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:14424 and etdadmin_upload_622561
-
- Description:
- Theoretical investigation of photochemical processes in molecules is a nontrivial task. Ab initio calculations that completely describe such processes are often intractable to perform given today’s hardware. Thus, to gain insight into common areas of interest, such as in transition metal photochemistry and organic photovoltaics, less accurate but more feasible...
- Subject:
- Chemistry
- Creator:
- Kelley, Matthew
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2018-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_631424 and http://dissertations.umi.com/northwestern:14486
-
- Description:
- Etching flourished as a printmaking medium in Paris during the Second Empire and early Third Republic, the precise timeframe of the city’s drastic transformation due to the state-authorized phase of urban renewal implemented under the reign of Napoléon III by his prefect of the Seine, Baron Georges-Eugène Haussmann. This study...
- Keyword:
- Adolphe, Buhot, Charles, Paris, Meryon, Felix, Etching, Printmaking, and Martial Potemont
- Subject:
- Art history
- Creator:
- Dunn, Ashley Elizabeth
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2019-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_662987 and http://dissertations.umi.com/northwestern:14670
-
- Description:
- We address the problem of efficient maintenance of the answer to a new type of query: Continuous Maximizing Range-Sum (Co-MaxRS) for moving objects trajectories. The traditional static/spatial MaxRS problem finds a location for placing the centroid of a given (axes-parallel) rectangle $R$ so that the sum of the weights of...
- Keyword:
- Maximizing Range-Sum Query, MaxRS3, Optimal Density Clustering, Bursty Updates, Moving Objects Trajectories, and MaxRS
- Subject:
- Mathematics, Computer engineering, and Computer science
- Creator:
- Mas-ud Hussain, Muhammed
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2018-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:14445 and etdadmin_upload_625938
-
- Description:
- In three empirical chapters, this dissertation examines the field of sustainability over time, specifically uncovering the processes by which contentious interactions between movements and organizations can shift to the development of shared meaning and the creation of new organizational positions. The dissertation utilizes the analyses strategies of text analysis, field...
- Keyword:
- Organizations, Discourse, Sustainability, Occupations, and Text Analysis
- Subject:
- Management and Sociology
- Creator:
- Augustine, Grace L
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2019-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:14762 and etdadmin_upload_678683
-
- Description:
- This dissertation uses the lens of sociomateriality to examine two cases of innovative, technology-mediated civic learning programs, a U.S. Government class in a suburban high school that engages students in a simulation of the legislative process, and an English Language Arts unit in an urban public school in which students...
- Keyword:
- technology integration, liminality, assemblage, sociomateriality, infrastructure, and civic learning
- Subject:
- Curriculum development, Education, and Educational technology
- Creator:
- Smirnov, Natalia
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2019-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_677419 and http://dissertations.umi.com/northwestern:14757
-
- Description:
- Celebrity, reputation, and identity were complex issues for nineteenth-century British actresses. This dissertation examines how actresses responded to, integrated, and defied gender norms and social structures as they performed “authentic” identities for consuming publics. I investigate how actresses participated in charity events and bazaars, autobiographical writing, and advertising campaigns in...
- Keyword:
- Identity, Victorian, Reputation, Celebrity, Actresses, and England
- Subject:
- History, Theater, and Theater history
- Creator:
- Kelly, Lisa Michelle
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2019-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_667794 and http://dissertations.umi.com/northwestern:14707
-
- Description:
- Regulations often impose quality restrictions on firms, which in turn can influence prices and welfare in a theoretically ambiguous manner. To study such quality restrictions, my coauthor and I examine the Wright Amendment by analyzing its full repeal in 2014 as a natural experiment, and the analysis is documented in...
- Subject:
- Economics
- Creator:
- Wang, Sibo
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2019-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:14634 and etdadmin_upload_662278
-
- Description:
- Cognitive impairment is a significant public health concern as the United States (US) population continues to age at unprecedented rates. It is well established that older adults are more likely to have higher rates of morbidity and mortality, in addition to greater healthcare utilization and costs. A parallel concern is...
- Subject:
- Clinical psychology
- Creator:
- Lovett, Rebecca Mullen
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2019-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:14694 and etdadmin_upload_666549