Results 71 to 80 of about 18,422 (208)

ZAMSTAR, The Zambia South Africa TB and HIV Reduction Study: design of a 2 x 2 factorial community randomized trial. [PDF]

, 2008
BACKGROUND: TB and HIV form a deadly synergy in much of the developing world, especially Africa. Interventions to reduce the impact of these diseases at community level are urgently needed.
Sismanidis, Charalambos, Beyers, Nulda, Ayles, Helen M, Ayles Helen M, Godfrey-Faussett, Peter, Hayes Richard J, Godfrey-Faussett Peter, Charalambos Sismanidis, Richard J Hayes, Nulda Beyers, Hayes, Richard J, Peter Godfrey-Faussett, Sismanidis Charalambos, Helen M Ayles, Beyers Nulda   +14 more
core   +1 more source

Statistical isomorphism of three-level fractional factorial designs

, 2006
From a statistician's standpoint, the interesting kind of isomorphism for fractional factorial designs depends on the statistical application. Combinatorially isomorphic fractional factorial designs may have different statistical properties when factors ...
Gilmour, Steven G.; id_orcid, Mead, Roger, Tsai, Pi W.   +2 more
core  

Trend-resistant and cost-efficient cross-over designs for mixed models. [PDF]

A mixed model approach is used to construct optimal cross-over designs. In a cross-over experiment the same subject is tested at different points in time.
Tack, L, Vandebroek, Martina
core  

Listing Unique Fractional Factorial Designs [PDF]

, 2009
Fractional factorial designs are a popular choice in designing experiments for studying the effects of multiple factors simultaneously. The first step in planning an experiment is the selection of an appropriate fractional factorial design.
Shrivastava, Abhishek Kumar
core  

Practical inference from industrial split-plot designs. [PDF]

Many industrial response surface experiments are deliberately not conducted in a completely randomized fashion. This is because some of the factors investigated in the experiment are hard to change.
Goos, Peter, Langhans, Ivan, Vandebroek, Martina   +2 more
core  

Parametric Optimization of a Cross-Beam Glulam Floor System Using Response Surface Methodology

Construction Materials
Cross-beam glued-laminated timber (glulam) floor systems offer material efficiency but pose a complex design challenge due to three-dimensional (3D) load interactions, and systematic optimization guidelines are lacking. This study implements a parametric
Oleksandr Gilodo, Andrii Arsirii, Sergii Kroviakov, Oleksandr Gimanov   +3 more
doaj   +1 more source

Screening strategies in the presence of interactions

, 2011
Product and process improvement can involve a large number of factors which must be varied simultaneously. Understanding how factors interact is a key step in identifying those factors that have a substantial impact on the response.
Woods, David C., Dean, A.M., Draguljic, D., Lewis, S.M., Vine, A.E.   +4 more
core  

A survey and evaluation of methods for determination of combinatorial equivalence of factorial designs

, 2008
Equivalent factorial designs have identical statistical properties for estimation of factorial contrasts and for model fitting. Non-equivalent designs, however, may have the same statistical properties under one particular model but different properties ...
Dean, A.M., Katsaounis, T.I.
core   +1 more source

(Dt,C) Optimal run orders. [PDF]

Cost considerations have rarely been taken into account in optimum design theory. A few authors consider measurement costs, i.e. the costs associated with a particular factor level combination.
Tack, Lieven, Vandebroek, Martina
core  

Distributive randomization: a pragmatic fractional factorial design to screen or evaluate multiple simultaneous interventions in a clinical trial

BMC Medical Research Methodology
Background In some medical indications, numerous interventions have a weak presumption of efficacy, but a good track record or presumption of safety. This makes it feasible to evaluate them simultaneously.
Skerdi Haviari, France Mentré
doaj   +1 more source