Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 20 for “"material optimization"”.
-
Raw Material Optimization to Bend the Biopharmaceutical Cost Curve
Raw materials sourced from sole third-party suppliers have been identified as one of the key risks to Amgen’s operation. This project aims to reduce raw material costs through sourcing alternative materials and optimizing material consumption. To systematically evaluate alternative material supply, …
-
Topology optimization with manufacturable multi-material primitives
Topology optimization is a field extending to the built environment. Traditionally, optimization focuses mainly on monolithic structures but recently, developments have been made toward determining algorithms for multi-material optimization. A preexisting algorithm is modified to broaden the type …
-
A strictly feasible sequential convex programming method
In free material optimization (FMO), one tries to find the best mechanical structure by minimizing the weight or by maximizing the stiffness with respect to given load cases. Design variables are the material properties represented by elasticity tensors or elementary material matrices, …
-
Device for selecting lightwave ranges via computer control for studying building material properties via goniophotometer
To enable the fast and accurate cataloging of material samples, I designed a filtration device for selecting specific visible and near-infrared light wavelengths related to the red, green, and blue sensitivity peaks of a visible detection camera and the pixel response for a near-infrared camera. …
-
Light-weight materials selection for high-speed naval craft
… analysis study was conducted on the process of materials selection for high-speed naval craft using the Modified Digital Logic (MDL) method proposed by B. Dehgham-Manshadi et al in ref [17]. The purpose is to show how this method along with Ashby's material selection process can be integrated to …
-
A composite material approach towards induction machine design using planar layer models
… the development of system limitations based on material constraints. Representation of an induction system in a composite-structure framework permits the removal of constraints common to current design procedures, allowing the effects of unusual material parameter combinations on system …
-
Aggregate gradation impacts on fresh properties of 3D concrete printing mixtures
… in construction efficiency, labor reduction, and material optimization, but its widespread adoption is limited by reliance on cement-rich mortar mixes and the lack of standardized mixture design frameworks. Existing literature on 3DPC identifies qualities of printable mixtures, such as a range in …
-
High speed photodiode and 90° optical hybrid for 2 µm optical communication systems
… µm while extending the technologies related to materials and processing for the passive and active components. To satisfy the system-level applications at this new wave band, opto-electronics devices at 2 µm should be developed. In this thesis, we present the building blocks regarding material …
-
Multi-Material Continuum Topology Optimization for Embodied Carbon Objectives
… design of buildings and infrastructure, topology optimization is an emerging technology, often seeking to make structures more materially efficient. It therefore offers a means to reduce the structural weight, and as such, minimize the global warming potential (GWP). This research provides an …
-
Reclaiming the estranged : imagining an architecture of excess
… Architects are typically situated downstream of material production; this ultimately confines design to values held by the construction industry. Blanketing their concerns for capital in false claims of sustainable building practices, the construction industry deliberately fetishizes material …
-
A generalized optimization methodology for isotope management
… Pu-239 content in used fuel, etc. and then used optimization to determine the best way to reach these goals. The first half of this research was devoted to identifying optimal flux spectra for irradiating used nuclear fuel from light water reactors to meet fuel cycle objectives like those …
-
Digital Fabrication for Contemporary Material Specificity
… placed the onus of design squarely within the material world. This movement attempted to replace the immaterial “metaphysical” approach to design and material with physically-provable absolute concepts of materiality. However, this model failed to recognize that the value and use life of modern …
-
Machine Learning Approaches for Improving Construction Materials and Pavement Systems
… of optimized construction and pavement materials that are cost-effective, sustainable, resilient, and long-lasting. The conventional experimental design approaches to designing construction materials and assessing pavement performance are time-consuming, expensive, and unable to …
-
Rotary (redox) reactor-based oxy combustion chemical looping power cycles for CO₂ capture : analysis and optimization
… the efficiency potential and perform a robust optimization of the integrated system. Analytical thermodynamic availability and ideal cycles are used to demonstrate the positive impact of reactor thermal coupling on system efficiency. Next, detailed process flow-sheet models in which the rotary …
-
Multifunctional Materials for Energy Harvesting and Sensing
… the fundamental behavior of multifunctional materials for energy conversion. Multifunctional materials exhibit two or more functional properties, such as electrical, thermal, magnetic etc. In this dissertation, the emphasis is on understanding the principles for energy conversion from one …
-
TOWARD ENHANCED BIMODAL SENSING: TIO₂-COATED METALLIC NANOSTRUCTURES FOR ELECTROCHEMICAL ANDPHOTOELECTROCHEMICAL DETECTION
… a study on the synthesis, modification, and optimization of titanium dioxide (TiO2) thin films for electrochemical and photoelectrochemical sensing applications. After preparing TiO2 films via a sol-gel process, using titanium isopropoxide as a precursor, a systematic investigation of sol …
-
Resonant-cavity-enhanced multispectral infrared photodetectors for monolithic integration on silicon
… focus on the development of novel IR sensitive material and resonant-cavity- enhanced (RCE) photodetector devices that address the emerging need in the field of IR radiation detection. Polycrystalline PbTe films have been identified as the IR absorbing layers due to their high photosensitivity …
-
Predictive Modeling and Durability Analysis of Low Carbon Concrete Incorporating Recycled Materials
… environmental demand for low carbon concrete materials has developed significant interest in the use of industrial by-products and recycled materials towards minimizing the environmental impact of concrete production processes. This dissertation investigates the use of recycled concrete …
-
Efficiency, manufacturability, and modeling challenges in structural design optimization
… presents new developments in structural design optimization on three topics: semi-analytical sensitivity analysis, design of composite structures fabricated via additive manufacturing, and topology optimization of structures under contact boundary conditions. We first give a general overview and …
-
Vibration and Buckling Analysis of Unitized Structure Using Meshfree Method and Kriging Model
… be required in the solution of an engineering optimization problem, many researchers have tried to find approaches and techniques in optimization which can reduce the number of function evaluations. In these problems, surrogate models for analysis and optimization can be very efficient. The …