Abstract. The aim of this paper is to study the asymptotic behavior of the solution of a parabolic dynamical boundary -value problem in a periodically perforated domain. The domain is considered to be a fixed bounded open subset Ω⊂R , in which identical and pe riodically distributed perforations (holes) of size ε are made. In the perforated domain we consider a heat equation, with a Dirichlet c...

The purpose of this research was to study the aqueous-based film coating of tablets utilizing a laboratoryscale side-vented perforated pan-coating apparatus. The process parameters of potential importance with respect to the final film quality were evaluated by using trial and error method. Tablets were evaluated for coating uniformity (mg), coating process efficiency (%), surface roughness, an...

this experiment was carried out to increase the shelf life and maintaining the quality of mango (mangifera indica) fruits. there were two factors. factor a: postharvest treatments with six levels (1. untreated (control), 2. washing with chlorine, 3. dipping (5 minutes) in calcium chloride (cacl2), 4. dipping (5 minutes) in bavistin and rinse in clean water, 5. hot water treatment and 6. tap wat...

unglazed transpired solar collectors are widely used for heating outside air directly, these days. pre-heating ventilation air for large spaces and heating air for crop drying, are some of the applications of these kinds of collectors. the outside air is drawn straight from ambient, uniformly through the whole surface of a perforated absorber (transpired, dark-colored plate) exposed to the sun....

Metals such as silver support surface plasmons: electromagnetic surface excitations localized near the surface that originate from the free electrons of the metal. Surface modes are also observed on highly conducting surfaces perforated by holes. We establish a close connection between the two, showing that electromagnetic waves in both materials are governed by an effective permittivity of the...

Several improvements to the metal cast framework have been suggested since resin-bonded fixed partial dentures was introdu-ced. Essentially, there are twotypes of retainer designs based on retention namely macromechanical with a perforated commonly referred as Rochette bridge and micromechanical derived from etched called Maryland bridge. This study is aimed compare tensile bond strength anadhe...

watercress is a leafy vegetable of the family brassicaceae that grows in and around water, it has a short shelf life (approximately seven days) and it is consumed raw or steamed. the objective of this work was to study the effect of packaging film and different storage temperature on the postharvest quality of watercress minimally processed. treatments were: packed with plain film (pd961ez, 31m...

Micro-perforated absorber is a newly developed sound absorber, and it has a number of attractive features: • Unlike conventional perforated absorbers, micro-perforated absorber can be made from transparent materials like plastic glass. • Unlike commonly used fibrous absorptive materials, micro-perforated absorber is fibrous-free and thus, there is no health concern. • Micro-perforated membranes...