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 65 for “"composite design"”.
-
Tree Component Alternatives to the Composite Design Pattern
The Composite design pattern is commonly employed in object-oriented languages to design a system of objects that form a part-whole hierarchical structure with composite objects formed out of primitive objects. The client does not differentiate between a composite object and a primitive object. The …
-
A central composite design to investigate antibody fragment production by Pichia pastoris
… expression), by a 3-factor-3-level central composite factorial design. This experimental design involved running shake flask culture at 15 different experimental conditions with duplicates. Optical density (OD600), dry cell weight (DCW), and BCA Protein Assays were done on each experiment. …
-
Recommendations for Design Parameters for Central Composite Designs with Restricted Randomization
In response surface methodology, the central composite design is the most popular choice for fitting a second order model. The choice of the distance for the axial runs, alpha, in a central composite design is very crucial to the performance of the design. In the literature, there are plenty of …
-
Improving Response Characteristics of Split Ring Resonators Using Experimental Designs
… this thesis is to investigate the application of design of experiments approaches in the analysis of split ring resonators, and to compare two different approaches. The design parameters of the meta-material device are examined to study all the main effects, the two factor interactions, and the …
-
Decision-Based Design of New Products: Electrothermal Swing Adsorption (Esa) System
… A response surface methodology using Central Composite Design is then used to optimize the operation of the ESA system. The results of the experiments also provide inputs to the multiattribute evaluation and design optimization. Finally, an assessment of ESA technology in terms of its …
-
Strength of welded headed studs in ribbed metal deck on composite joists
Standards for stud strength in composite joists are presently not available. Existing standards for composite design are targeted for composite beam design while design of a composite joist requires more emphasis on stud strength to fully develop the joist bottom chord. Stud placement in the deck …
-
Experimental Investigation of the Effect of Composition on the Performance and Characteristics of PEM Fuel Cell Catalyst Layers
… of catalyst layer composition using a Central Composite Design (CCD) experiment with two factors which are Nafion content and carbon loading while the platinum catalyst surface area is held constant. For each catalyst layer composition, polarization curves are measured to evaluate cell …
-
An experimentally designed melt rheological characterization of starblock polymers
… polymers was investigated using the experimental design technique of response surface methodology. A rotatable central composite design (ccd) was employed with linear 2⁵ factorial structure and with axial points to fit the pure quadratic terms. Regression analysis of rheological data from …
-
Investigation of operating parameters in a vertical stirred mill
… a statistical analysis. The experiments was designed using a face centred central composite design (FCCD) and the results was statistically analysed using a design of experiments (DOE) software.
-
Design, Fabrication, and Characterization of Metals Reinforced with Two-Dimensional (2D) Materials
… for making such materials are Metal matrix composites (MMCs). MMCs contain dispersions of reinforcement in the form of fibers, particles, or platelets that significantly improve their thermal, electrical, or mechanical performance. This dissertation focuses on reinforcement with …
-
Short-term traffic forecasting for a smart satellite communications system
… Each algorithm was tuned using a two-stage design of experiments process consisting of a fractional screening design to identify impactful hyper-parameters and a central composite design to find optimal model settings. During a holdout period, the mean absolute percentage error using a …
-
Assessing human performance trade-offs of a telephone-based information system
… system. The research method utilized a centraI-composite design to study four variables at five levels each. The four factors manipulated were: synthesized speech rate, time available for user input, subject age, and background music level. Subjects searched a fictitious department store …
-
Addressing Rural Health Access Inequity by Assessing Potential and Organizational Readiness for Antifragile Electronic Health Project Design in Rural Communities
… sustain in their original settings. Antifragile design and complexity informed principles can improve pilot project lifespans, where antifragile entities gain stability from uncertainty, rather than lose integrity. Operators of antifragile projects include optionality, non-linear evaluation, …
-
Method of reliability-based calibration of seismic structural design parameters
Structural design under seismic load requires proper consideration of uncertainties associated with loads and resistance as well as the limited ability of analytical models to describe the response of a structure. To account for these uncertainties, the design parameters in current seismic codes …
-
Aggregate gradation impacts on fresh properties of 3D concrete printing mixtures
… mixes and the lack of standardized mixture design frameworks. Existing literature on 3DPC identifies qualities of printable mixtures, such as a range in fluidity/rheology where the mixture’s pumpability, extrudability, and buildability requirements are met. However, no comprehensive …
-
Data Driven Surrogate Based Optimization in the Problem Solving Environment WBCSim
Large scale, multidisciplinary, engineering designs are always difficult due to the complexity and dimensionality of these problems. Direct coupling between the analysis codes and the optimization routines can be prohibitively time consuming. One way of tackling this problem is by constructing …
-
Fatigue Performance and Shear Demand Distributions of Clustered Shear Connectors in Composite Bridge Girders
… flow demands at the steel-concrete interface of composite bridge girders. As stud pitch increases to beyond 24 in or as studs become clustered to account for pre-cast concrete decks, this assumed shear demand distribution may be unrepresentative. Understanding shear transfer and resulting demands …
-
Interfacial Thermomechanical Behavior of Hybrid Carbon Fibers
… fiber/epoxy interface is of great importance in composite design due to its load transfer mechanisms from the weak epoxy to the stronger fiber. Improving the strength of the interface reduces the risk of failure at the interface and improves the load transfer to the fiber. In this study, two …
Page 1 of 4