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Showing 1 to 20 of 377 for “"factorial design"”.
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Factorial design for a sequential allocation study
… further by means of simulation in the form of a factorial experiment. Of primary concern has been the behavior of different weighting functions operating under varying experimental conditions. Response variables have been studied as a means for evaluating the effectiveness of the procedure. The …
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A ranking experiment with paired comparisons and a factorial design
A method is presented for analysing a 2 x 2 factorial experiment in which the data consist cf relative rankings in pairwise comparisons. Maximum likelihood estimates are developed for the ratings of the various levels of each factor und for the treatment combinations. Likelihood ratio tests of the …
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The Effects of Methanol and Isopropanol on the Chiral Separation of Dronabinol and Three Related Impurities: A 3 X 3 X 3 Factorial Design
… 1-3% methanol with 1-7% IPA in n-heptane. A factorial design was used to study the main and interaction effects of these alcohols as measured by the retention time, selectivity, and resolution of each pair of enantiomers, as well as the critical pair: (+)-Δ9-THC and (-)-Δ8-THC. Methanol did …
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Row-column factorial designs and mutually orthogonal frequency rectangles
A (full) qᵏ factorial design with replication λ is the multi-set containing all possible q-ary sequences of length k, each occurring exactly λ times. An m × n row-column factorial design is any arrangement of λ replicates of the qᵏ factorial design in an m × n array. We say that the design has …
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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 …
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Optimization of ligament parameters on a subject-specific computational human knee model in a dynamic knee simulator using design of experiments
… walk cycle were compared in a two level partial factorial design and a three level full factorial design and the ligament parameters were optimized based on the kinematic RMS error. The resulting parameter values are 80% of the experimentally derived zero load length values, 99.71% of the …
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Effects of Nutrients and Top Predators on the Structure and Dynamics of a Freshwater Plankton Community: Experimental Studies
… and fish levels were manipulated in replicated, factorial-design experiments.
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Philosophy of Human Nature as a Function of Political Preference, Political Involvement, and Age
… of Human Nature (PHN) Scale and a 2X2X2 factorial design with party preference, level of political involvement, and age as the three main effects to test twelve specific hypotheses. One hundred twenty subjects were randomly selected from among the Democratic and Republican parties of …
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Poly (2,6-dimethyl-1,4-phenylene oxide) hollow fibres for gas separation.
… methane permeate flux of the hollow fibres. A factorial design was used to determine which of the effects were significant and if there were any interactions between the variables that also affected the hollow fibre properties. The results were used to develop models for each of the five …
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Effect of Food Availability and Predation on the Population Dynamics and Spacing Behavior of Prairie Voles
… simultaneously are few. Furthermore, none used a factorial design with replicates to determine individual and interactive effects. In this study, I manipulated food availability and predation and used a factorial design with replicates. I tested the hypothesis that food availability, predation, …
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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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The effects of different interface presentation modes and users' individual differences on users' hypertext information access performance
… performance. The study employed a 2 x 2 x 2 factorial design. The three independent variables were cognitive style (field dependent, field independent), level of computer experience (less experience, more experience), and interface presentation mode (text-only, text/graphic). Performance was …
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A Study of the Effect of School-Sponsored, Extra-Curricular Activities on High School Students' Cumulative Grade Point Average, SAT Score, ACT Score, and Core Curriculum Grade Point Average
… A two-way ANOVA test with a two-by-five factorial design was completed for research questions one through four. A one-way ANOVA with a one-by-five factorial design was completed for research question five. When a significant F was found, Scheffe and LSD post hoc tests were completed to …
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The Fermentation of Cheese Whey by Lactobacilius helvecticus
… growth in whey permeate was carried out using factorial design, as opposed to a traditional univariate approach. Using this technique, the variation of specific growth rate with pH, temperature and stiirer speed was assessed.<br/><br/>Cell growth and lactic acid formation in whey permeate …
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The Effects of Training and Feedback Format on Reactions to in-basket feedback and on In-Basket Performance
… 2 (In-Basket) x 5 (Dimension) repeated measures factorial design. Reactions were evaluated with a 2 (Training) x 3 (Feedback) x 2 (Questionnaire) repeated measures factorial design. The Training factor was comprised of frame-of-reference training (designed to prepare the recipient to receive the …
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The Effects of Reading & Reading Strategy Training on Lower Proficiency Level Second Language Learning
… The treatment groups were each part of a 2 by 2 factorial design. All treatment groups read a scriptural text for thirty minutes each day for five weeks. One group read the text aloud each day while another group read silently. The third and fourth groups read aloud and silently, respectively, …
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Showup identifications: the effects of presence of stolen property and suspect’s denial on identification performance
… explanation, denial, silence) between-subjects factorial design. Binary logistic regression analysis indicated that both the target and stolen property, independently, and significantly predicted the accuracy of identification decisions. Surprisingly, the presence of stolen property facilitated …
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Development of Ti-Si-N and Ta-Si-N as diffusion barriers
… 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, X-ray …
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Influence of the Negative IAPS and Method of Hemispheric Presentation on Performance on the Affective Auditory Verbal Learning Test
… on verbal performance. Experiment I was a 2x2 factorial design: two types of pictures from the International Affective Picture System (IAPS), negative or neutral and two gender conditions, male and female. Experiment I was used to verify that the IAPS results in an emotional response. Heart …
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Attitudinal Outcomes of Punishment Events in Team-Sporting Settings
… X 3 (punishment severity: low, moderate, high) factorial design was utilized to develop punishment scenarios in team-sport settings which were evaluated by 205 participants. Decision-making procedure and punishment severity both produced significant main effects on evaluations of the fairness of …
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