The mechanical properties of films of gels composed of a crude oil or corn oil and (R)-12-hydroxystearic acid are described using oscillatory rheology and water-surface waves. The integrity of these gel films are contrasted with those of neat oil films subjected to the same types of mechanical testing. The oil-based gels are thixotropic, and we quantify their post-recovery yield. A simple model...

The surface of an activated vanadium phosphorus oxide (VPO) catalyst was investigated by means of in situ X-ray absorption spectroscopy in the total electron yield mode. We observed significant changes of the V L3-near edge X-ray absorption fine structure (NEXAFS) when the material was transferred from room temperature to working conditions at 400°C in the reaction atmosphere. We studied the sa...

0168-1699/$ see front matter 2012 Elsevier B.V. A http://dx.doi.org/10.1016/j.compag.2012.04.001 ⇑ Corresponding author. E-mail address: [email protected] (T.E. Grift). The objective of this research was to develop a stem height measurement system forMiscanthus giganteus (MxG), to be used as a component in a future Look Ahead Yield Monitor (LAYM). For this purpose, a SICK LMS 291 LIght Detecti...

In this work we present an investigation of the influence of particle surface characteristics on the electrorheological (ER) behavior of suspensions of either pure or modified hematite (α-Fe(2)O(3)) particles dispersed in silicone oil. The modification consisted of either dehydration or hydrophobization of the particles before preparing the suspensions. A comparison was performed between the el...

this paper focuses on formulating capacity-price trade off problem in yield management for manufactur-ing industry by drawing motivation from the remarkable success of yield management (ym) implementation in airlines. in the current practice, there is no alternative and procedure for the manufacturer, as well as cus-tomers to take advantage of using the unfulfilled capacity in discounted offers...

This paper proposes a new approach for representing elasto-plastic behavior through graphical visualization of the yield surface and the stress path in the principal stress space. The yield surface is defined by thematerial parameters of a given yield criterion, and the stress path is formed by a number of stress points, each of which is obtained for every increment in the applied force. The su...

to investigate the changes in yield and yield components of dry land wheat (triticum aestivum l. cv agosta), under the influence of residue and nitrogen levels and different tillage practices, a field experiment was conducted during the 2006-2007 growing season, in the agricultural research station of the college of agriculture, shiraz university, iran. the experiment was designed as a split-sp...