The vast majority of controllers found in manufacturing plants use a combination of Proportional, Integral and Derivative (PID) control. These controllers are easily understood, and there are only three controller values to set up when attempting to achieve an acceptable system response. This paper looks at one industrial application of a PI controller, controlling the speed of a casting drum i...

The shear panels of plate girder made from corrugated in the web is investigated this research. A beam attached zone as part an experimental and theoretical investigation into girders. In experiments, seven specimens were tested under two points load. Six them different shape web, last specimen was without corrugation a reference called control. study effected (corrugation plate, thickness with...

Objectives: There are some comorbidity between migraine, tension headaches, and some psychological  factors including Early Maladaptive Schemas (EMSs). This research aimed to identify the EMSs  associated with migraine and tension headaches.  Methods:  The present study was of cross sectional and correlational studies. The measures included  Headache Disability Invento...

in this paper the density and temperature dependencies of surface tension are investigated. using the lennard-jones (12,6), as an effective pair interaction potential, a linear expression is derived for isotherms of g /r2  versus r2 for some normal and chlorofluorocarbons (cfcs) fluids, where  is surface tension and r = 1/v is molar density. the linearity behavior of the derived equation is wel...

Web traction over rollers is known to deteriorate due to air entrainment at high web speeds. In this paper, a general model is presented to predict the traction capability of an impermeable web over a smooth roller. The model considers the effects of the web and roller speeds, roller radius, combined roughness of the two surfaces, web tension and thickness, friction coefficient, and compressibl...

spider orb webs 2 3 Running title: Spider web response to humidity 4 5 Cecilia Boutry * and Todd Alan Blackledge 6 7 University of Akron and Integrated Biosciences Program, University of Akron, Akron, OH 443258 3908, USA 9 *Author for correspondence ([email protected]) 10 11 Abstract 12 Like many biomaterials, spider silk responds to water through softening and swelling. Major ampullate 13 s...