Wood extractives in radiata pine are the source of the observed pitch problems in the pulp and paper industry. Various methodologies have been studied and used to reduce or eliminate their negative effects. A biological treatment with albino fungi of the Ophiostoma genus, fungi that degrade the lipidic components of extractives, has been proposed as a more environmentally friendly alternative f...

A parametric study of the thermal performance during charging of a full-scale radial inlet diffuser in a cylindrical stratified chilled water storage tank was performed by applying factorial experimental theory to the results of simulations performed with a validated computational fluid dynamics (CFD) model. Part 1 describes the development and validation of the CFD model. Part 2 summarizes the...

1. In poultry investigations, the main interest is often to study the effects of many factors simultaneously. Two or three level factorial designs are the most commonly used for this type of investigation. However, it is often too costly to perform when number of factors increase. So a fractional factorial design, which is a subset or a fraction of a full factorial design, is an alternative. Th...

We discuss two dimensional QCD(Nc → ∞) with fermions in the fundamental as well as adjoint representation. We find factorial growth ∼ (gNcπ) (2k)!(−1) k−1 (2π)2k in the coefficients of the large order perturbative expansion. We argue that this behavior is related to classical solutions of the theory, instantons, thus it has nonperturbative origin. Phenomenologically such a growth is related to ...

This article addresses the varied possibilities for following a two-level fractional factorial with another fractional factorial half the size of the original experiment. While follow-up fractions of the same size as an original experiment are common practice, in many situations a smaller follow-up experiment will suffice. Peter John coined the term “semifolding” to describe using half of a fol...