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Showing 1 to 20 of 49 for “"Fractional Factorial"”.
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Assessment of adaptive one-factor-at-a-time method vs. fractional factorial methods using reconfigurable paper aircraft
… (aOFAT) methods outperform more commonly used fractional factorial methods. This study sought to corroborate these claims by analyzing a case study of a real-life experiment. A full factorial experiment was conducted to collect data for simulations of fractional factorial and adaptive …
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Human detection of computer simulation mistakes in engineering experiments
… plan for the control group or a resolution III fractional factorial plan for the treatment group -- with a flawed computer simulation of the device. A domain knowledge score was measured by quiz, and success or failure in discovering the flaw was measured by questioning during debriefing. About …
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Development of Ti-Si-N and Ta-Si-N as diffusion barriers
… with a variety of deposition parameters. A fractional factorial design (FFD) method was used to identify the significant deposition variables for the Ti-Si-N film deposition. The properties of the films as diffusion barriers between Cu and Si were studied using sheet resistance measurements, …
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The performance of orthogonal arrays with adjoined or unavailable runs
Orthogonal arrays are a class of fractional factorial designs that are optimal according to a range of optimality criteria. This makes it tempting to construct fractional factorial designs by adjoining additional runs to an OA, or by removing runs from an OA, when the number of runs available for …
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Analyzing Unreplicated Two Level Factorial Designs
… often used in analyzing unreplicated two level factorial and fractional factorial designs. Typically no objective method is used with these plots for assessing if a plotted point is associated with a nonzero effect. Firstly, we provide an analysis of the plotting positions used in constructing …
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Cattle Producer Motivations and Willingness to Participate in Industry Animal Welfare Program Verification
… their opinions of the BQA program, and using fractional factorial design to assess what components of a program would most likely encourage producer participation.</p>
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Sequential optimization through adaptive design of experiments
… and compare its performance to saturated fractional factorial designs. The rationale for adopting the adaptive OFAT design scheme become clear if it is imbedded in a Bayesian framework: it becomes clear that OFAT is an efficient response to step by step accrual of sample information. The …
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Evaluation of the Design of a Family Practice Healthcare Clinic Using Discrete-Event Simulation
… statistical techniques, including batch means; fractional factorial design; and simultaneous ranking, selection, and multiple comparisons. An explanation of the experimental design is provided and results of the experimentation are presented. Based upon the experimental results, conclusions are …
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The machinability of a gamma titanium aluminide intermetallic
… (Ti-6Al-4V) alloys was also performed. Full and fractional factorial (Taguchi) experimental designs were employed to identify the effect of key operating factors and levels on output measures (tool life/wheel wear, forces, power, and workpiece surface roughness). Taguchi main effect plots are …
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Analysis, Experimental Optimization and Chemical Synthesis of Cyclic Monomers Occurring in Edible Fats and Oils
… for a given time/resolution response function; a fractional factorial experiment at two levels was used to estimate the effects of five analytical conditions. Finally, the chemical synthesis of the 1,2-disubstituted cyclopentyl fatty acid methyl esters was undertaken to definitively confirm the …
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Measurement Error in Designed Experiments for Second Order Models
… the effect of Berkson error on two-level factorial and fractional factorial designs. This dissertation extends the examination to designs for second order models. The results are used to suggest optimal values for axial points in Central Composite Designs. The proper analysis for …
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Development and gas permeation study of flat asymmetric polyphenylene oxide membranes.
… tested for CO$\sb2$/CH$\sb4$ separation. Using a fractional factorial design, a study of membrane casting conditions was completed in order to optimize the flux and the selectivity of the membrane. A membrane with a CO$\sb2$/CH$\sb4$ pure gas permeation rate ratio of 119 and a CO$\sb2$ permeation …
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Ensembles of Adaptive One-Factor at-a-Time experiments : methods, evaluation, and theory
… namely a single orthogonal array (full and fractional factorial designs), which is equally resource intensive. Comparisons between the two experimental algorithms are conducted using a hierarchical probability meta-model (HPM) and an illustrative case study. The case is a wet clutch system …
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ΜΕΛΕΤΗ ΠΡΟΣΔΙΟΡΙΣΜΟΥ ΕΝΩΣΕΩΝ ΥΔΡΑΡΓΥΡΟΥ ΜΕ ΤΗ ΦΑΣΜΑΤΟΜΕΤΡΙΑ ΑΤΟΜΙΚΗΣ ΑΠΟΡΡΟΦΗΣΗΣ ΨΥΧΡΟΥ ΑΤΜΟΥ ΚΑΙ ΒΕΛΤΙΣΤΟΠΟΙΗΣΗ ΜΕ ΠΑΡΑΓΟΝΤΙΚΟ ΣΧΕΔΙΑ...
… WAS ACHIEVED BY THE APPLICATION OF A COMPLETE FACTORIAL DESIGN, ANALYSIS OF VARIANCE OF RESULTS AND DETERMINATION OF OPTIMUM RESPONSE SURFACE BY MEANS OF ONE-AT-A-TIME EXPERIMENTS. IN THE SECOND CASE, THE OPTIMIZATION WAS DONE BY SUBSEQUENT USE OF FRACTIONAL FACTORIAL DESIGN, ANALYSIS OF …
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Heat transfer between a supernatant gas and a flowing shallow gas- fluidized bed of solids
… the S-gas and the shallow fluidized bed. A fractional-factorial design of experiments was performed on two heat-tray systems using three different results showed that fine fluid cracking catalyst (FCC) particles out-performed larger alumina spheres as a fluidized solid. Heat transfer …
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Separation of Recombinant β-Glucuronidase from Transgenic Tobacco by Aqueous Two-Phase Extraction
… amounts of impurities from the initial extract. Fractional factorial designs and response surface methodology were used to determine an optimized aqueous two-phase system for the purification of rGUS from transgenic tobacco. In a 13.4 % (w/w) PEG/18% (w/w) potassium phosphate system, 74% of the …
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Affordances In The Design Of Virtual Environments
… as a 2 [subscript IV] [superscript 4-1] fractional factorial design. The results demonstrated that providing affording cues led to behavior closely in-line with real-world behavior. More specifically, when given affording cues participants tended to rotate their virtual bodies when …
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The Effect of Lead Oxide Powder on Battery Paste Composition
… was determined. A series of tests referred to as fractional factorial optimisation tests were performed using various batches of lead oxide powder. The composition of each trial positive paste mix was assessed. Through the use of regular analysis techniques, the characteristic lead oxide required …
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Describing local community acceptance with discrete choice theory for enhanced community engagement
… mining projects. A mixed style, blocking scheme, fractional factorial without interaction discrete choice experiment was proposed to overcome the challenge posed by the large number of relevant factors. The design was validated, revised, and implemented in Salt Lake City, UT to illustrate the …
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An investigation into column flotation of South African coals
… using both one-variable-at-a-time testing and fractional factorial design experiments. An investigation into coal slurry conditioning using oil and oil-water dispersions was also undertaken. The results of laboratory and plant column testwork showed that it was possible to recover the desired …
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