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- Description:
- Modeling the mechanical performance of metal produced with additive manufacturing (AM) has proven to be a challenging task. In the as-built state, these materials have been shown to exhibit strong heterogeneity and anisotropy. Even after post-processing, such as heat treatment or hot isostatic pressing and depending on the alloy, some...
- Keyword:
- Simulations, Additive manufacturing, Mechanical performance, and Solid mechanics
- Subject:
- Mechanics, Materials Science, and Mechanical engineering
- Creator:
- Kafka, Orion Landauer
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 04/28/2020
- Date Created:
- 2019-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:14952 and etdadmin_upload_708678
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- Description:
- Molecules are highly social: they recognize one another and form bonds with those they are attracted to and repel those they are not. Some molecules establish strong bonds, while others form weak, transient associations. These interactions are ubiquitous in Nature and are integral to life. For at the basis of...
- Keyword:
- Supramolecular chemistry, Weak-Link Approach, Organometallic chemistry, and Coordination chemistry
- Subject:
- Chemistry
- Creator:
- d'Aquino, Andrea
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 04/28/2020
- Date Created:
- 2019-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:14962 and etdadmin_upload_712493
-
- Description:
- The application of formal multilayer networks (MLNs)—networks which contain multiple types of relationships, data types, or other additional features of complexity and connectivity—has recently become popular in many fields. Areas of study ranging from social science to biology have utilized MLNs to explore, describe, and analyze interconnected complex systems. MLNs...
- Keyword:
- Hospital Operations, Intracranial Hemorrhage, Patient Outcomes, Teamwork, Electronic Health Record Data, and Networks
- Subject:
- Information science, Health sciences, and Health care management
- Creator:
- Chandler, Ariel
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 04/28/2020
- Date Created:
- 2020-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_713264 and http://dissertations.umi.com/northwestern:14964
-
- Description:
- Metal Additive manufacturing (AM) processes build 3D objects by heating and consolidating material in a point-by-point manner. Unlike traditional manufacturing methods, AM allows the material properties of each point in the build to vary by controlling process conditions locally. The process parameters can be considered as inputs to the AM...
- Keyword:
- Metrics, Toolpaths, Additive manufacturing, Design space, Scan strategy, and Graph theory
- Subject:
- Mechanical engineering
- Creator:
- Cheng, Puikei
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 04/28/2020
- Date Created:
- 2020-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_719256 and http://dissertations.umi.com/northwestern:15008
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- Description:
- This dissertation describes modifications to the surface of colloidal semiconductor quantum dots (QDs) to improve their use as photocatalysts for charge transfer reactions. The surface atoms and ligands of these nanoparticles can interfere with direct charge transfer to a reagent by inhibiting binding, forming trap states, or acting as competitive...
- Keyword:
- Quantum Dots, Nanomaterials, Charge Transfer, and Photocatalysis
- Subject:
- Nanoscience
- Creator:
- McClelland, Kevin Patrick
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 04/28/2020
- Date Created:
- 2019-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:14953 and etdadmin_upload_709080
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Implications of Within-Species Root and Shoot Trait Variation and Plasticity for Species Coexistence
- Description:
- Understanding the outcomes of interactions from assessing shoot traits has practical applications and has elucidated major ecological patterns. Roots and shoots differ in their functions and can differ in responses to abiotic and biotic stimuli. And while roots are more difficult to characterize because they tangle and are embedded in...
- Keyword:
- Plasticity, Species coexistence, Root traits, Intraspecific variation, Water stress, and Interaction
- Subject:
- Ecology, Plant sciences, and Conservation biology
- Creator:
- Foxx, Alicia J
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 04/28/2020
- Date Created:
- 2020-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:15010 and etdadmin_upload_719313
-
- Description:
- Label-free assays, and particularly those based on the combination of mass spectroscopy with surface chemistries, enable high-throughput experiments of a broad range of reactions. However, these methods can still require the incorporation of functional groups that allow immobilization of reactants and products to surfaces prior to analysis. In this thesis,...
- Keyword:
- Nanotechnology, SAMDI, Surface chemistry, Microarray, Mass Spectrometry, and Reactions
- Subject:
- Chemistry, Biomedical engineering, and Chemical engineering
- Creator:
- Helal, Kazi Yasin
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 04/28/2020
- Date Created:
- 2019-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:15011 and etdadmin_upload_719318
-
- Description:
- In this dissertation I leverage new data from the global music recording industry to study the social foundations of creativity and the relationship between product novelty, gender, and commercial success. In Chapter 1, I investigate how different kinds of social connection influence the creation of novel cultural products. Using data...
- Keyword:
- Cultural Markets, Social influence, Creativity, Networks, and Music
- Subject:
- Management, Sociology, and Organization theory
- Creator:
- Mauskapf, Michael Gerard
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 04/28/2020
- Date Created:
- 2019-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:14959 and etdadmin_upload_711355
-
- Description:
- This thesis explains the works that have been completed towards the Ph.D. thesis of the author and discusses the conclusions derived from the results, as well as what future holds for stress-related mobile health research. Main focus of the thesis is use of wearable sensors to understand physiological manifestation of...
- Subject:
- Computer engineering
- Creator:
- Egilmez, Begum
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 04/28/2020
- Date Created:
- 2020-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:15007 and etdadmin_upload_719233
-
- Description:
- Understanding structure-property relationships for polymer nanocomposites is one of the primary challenges in discovering new, light weight, multifunctional advanced materials. Polymer nanocomposites are a class of advanced materials comprised of soft polymer matrix and nano-filler inclusions. While it has been found qualitatively that enhancements of material properties could be achieved...
- Subject:
- Mechanical engineering
- Creator:
- Hu, Anqi
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 04/28/2020
- Date Created:
- 2019-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:15012 and etdadmin_upload_719334
-
- Description:
- A growing body of research analyzes how corporate social responsibility programs are used to absorb and neutralize the social criticisms coming from social and environmental movements and to superficially respond to the ensuing new regulations. If companies have powerful tools to resist changes and blunt the meaning of the law,...
- Keyword:
- legal endogeneity, diversity, social movements, and managerialization of the law
- Subject:
- Law and Sociology
- Creator:
- Buchter, Lisa Danielle
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 04/28/2020
- Date Created:
- 2019-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_713371 and http://dissertations.umi.com/northwestern:14965
-
- Description:
- Maneuvering your limbs requires both accurate commands for how to move, and accurate feedback of their true movements. Conventional prosthetic arms currently lack this sense of proprioceptive feedback, which can make daily tasks difficult without close visual monitoring. Although studies have successfully provided artificial proprioceptive feedback to improve control, this...
- Keyword:
- motor adaptation, sensory feedback, and myoelectric prosthesis
- Subject:
- Biomedical engineering and Neurosciences
- Creator:
- Earley, Eric Joseph
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 04/28/2020
- Date Created:
- 2019-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_713001 and http://dissertations.umi.com/northwestern:14963
-
- Description:
- Deep learning is a new area of machine learning research that allows deep neural networks composed of multiple processing layers to learn representations of data with multiple levels of abstraction. Deep learning has helped in achieving the objective of pushing machine learning closer to one of its original goals of...
- Keyword:
- deep neural networks, machine learning, deep learning, and artificial intelligence
- Subject:
- Computer engineering
- Creator:
- Jha, Dipendra Kumar
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 04/28/2020
- Date Created:
- 2019-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_711601 and http://dissertations.umi.com/northwestern:14960
-
- Description:
- Neurons are sensitive to the mechanical properties of their environment and show better growth, survival and differentiation when they are cultured in soft environments with mechanical properties similar to those of the brain compared to other tissues. Within the central nervous system (CNS), there is also a range of mechanical...
- Keyword:
- Hydrogels, Peptide amphiphiles, Mechanical properties, aza-glycine, Neurons, and Supramolecular
- Subject:
- Chemistry, Biomedical engineering, and Neurosciences
- Creator:
- Godbe, Jacqueline M
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 04/28/2020
- Date Created:
- 2020-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:15006 and etdadmin_upload_719165
-
- Description:
- Desmosomes, complex structures found at intercellular junctions, are important for the development, structural integrity, and immune barrier of the skin. Extracellular components of the desmosome connect neighboring cells and intracellular interactions amongst cadherin, armadillo, and plakin proteins anchor the desmosome to intermediate filaments. Beyond their canonical role as “spot welds”...
- Subject:
- Health sciences and Cellular biology
- Creator:
- Lee, Sherry
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 04/28/2020
- Date Created:
- 2018-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_572406 and http://dissertations.umi.com/northwestern:14076
-
- Description:
- With the growing size of networks and datasets and the lack of centralized access to information, distributed control and optimization become inevitable. In the first part of this thesis, we develop an asynchronous Newton-based distributed optimization algorithm and analyze its convergence properties. Our algorithm benefits from the fast convergence properties...
- Keyword:
- Asynchronous algorithms, Consensus optimization, Distributed optimization, Gradient method, and Newton's method
- Subject:
- Electrical engineering
- Creator:
- mansoori, fatemeh
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 04/28/2020
- Date Created:
- 2020-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_719666 and http://dissertations.umi.com/northwestern:15015
-
- Description:
- Organic solar cells (OSC) are a next generation solar energy technology that offers the advantages of scalable fabrication, light weight, flexibility, and earth-abundant starting materials. Despite tremendous advances in OSC power conversion efficiency (PCE) over the last decade, active layer material selection and optimization is still largely empirical. In order...
- Keyword:
- Small molecule, Non Fullerene, Crystal Structure, Photovoltaic, and Organic solar Cells
- Subject:
- Chemistry, Materials Science, and Energy
- Creator:
- Swick, Steven Mitomu
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 04/28/2020
- Date Created:
- 2019-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:14961 and etdadmin_upload_712474
-
- Description:
- The authors of the article “Toward Environmentally Sustainable Digital Preservation” created this workshop as a space for participants to discuss issues of environmental sustainability in digital preservation, identify and enact change toward sustainable practices in their organizational contexts, and identify and plan further research. The workshop was run for the...
- Keyword:
- permanence, access, sustainability, appraisal, digital preservation, and climate change
- Subject:
- Digital preservation and Sustainability
- Creator:
- Alagna, Laura, Sampson, Walker, Walsh, Tessa, and Pendergrass, Keith L.
- Owner:
- Laura M Alagna
- Date Uploaded:
- 03/27/2020
- Date Modified:
- 05/18/2020
- Date Created:
- 2019-10-24
-
- Description:
- There is growing evidence that growth with invasive species influences the traits of co-occurring native plants over multiple generations. Some studies indicate that these experienced populations perform better in the presence of the invasive species that led to the trait changes. These experienced populations could serve as source material for...
- Keyword:
- seed source, Naive, Native plant, and roots
- Subject:
- Invasive species influence on native species
- Creator:
- Alicia J. Foxx and Giselle Varrientos
- Contributor:
- Ashley Garcia, Andrea T. Kramer (advisor), Ann Hild (plant materials), and Nora Talkington
- Owner:
- Alicia Foxx
- Language:
- English
- Date Uploaded:
- 03/27/2020
- Date Modified:
- 03/27/2020
- Date Created:
- 2015-08-01
- Resource Type:
- Dataset
-
- Description:
- Soil texture has important ramifications on the shape and size of roots as well as impacting how much water is taken up and the distribution of nutrients in the soil. These factors lead to differences in growth characteristics and plant performance. However, what traits and how the plant responds to...
- Keyword:
- gravel, intraspecific trait variation, sand, invasive grass, lateral roots, Water stress, and Turface
- Subject:
- Soil type and plant growth responses
- Creator:
- Alicia J. Foxx and Siobhan T. Wojcik
- Contributor:
- Andrea T. Kramer (advisor)
- Owner:
- Alicia Foxx
- Language:
- English
- Date Uploaded:
- 03/27/2020
- Date Modified:
- 03/27/2020
- Date Created:
- 2015-11-04
- Resource Type:
- Dataset