Myrmecologists have long studied the systematics, behavior, ecology, and evolution of ants. This first involved fundamental approaches including morphological description or behavioral observation, perhaps with the help of microscopes or marking ants with paint or wire. Many discoveries over the past 20 years have been accomplished with the help of more molecular approaches including allozymes,...

the effect of 6-month water storage on microleakage of two-component self-etch adhesive systems      dr. mohammadibasir m .,1 dr. seyed tabaii e .2   1 assistant professor, department of operative dentistry , school of dentistry, shahed university. tehran , iran.   2 dentist.     (received 5 dec, 2010 accepted 14 april, 2011)     abstract     background and aim : simplification of the self-etch...

Recent examination and treatment of the Worcester Art Museum’s Reclining Nude, c. 1925, oil on canvas, by the Dutch-born Fauve artist Kees Van Dongen (1877-1968) indicate that the artist used unorthodox materials and techniques, including selective varnishing to adjust color saturation and surface sheen. Examination also revealed resinlike beads exuded from unvarnished passages of paint conside...

Physically based rendering of metallic and pearlescent appearance requires knowledge of the composition of paint or coating. However, sometimes composition is not available, while the Bi-directional Reflectance Distribution Function (BRDF) is measured from an actual sample. Such a situation invokes the inverse problem to find a paint composition from a given BRDF. We solve this problem based on...

The checkerboard constitutes the best pattern for in-plane displacement and strain measurement because it maximizes image gradient. use of laser marking to deposit such a on flat surfaces is investigated in this paper. Optimal settings parameters influencing quality are given. This being periodic, images processed with localized spectrum analysis, which one spectral techniques used process imag...

For this costumer placed in Belfast, UK, simulation has been used to investigate the manufacturing process, to evaluate bottlenecks and to prepare the background for simulation based, in-line scheduling. The actual problem at the shop floor deals with synchronizing work flows and optimizing production in conjunction with customer orders . Over 1700 different kinds of orders can be manufactured ...

Currently, the use of polymer composite materials for road markings, in particular thermoplastics based on petroleum resins, is promising. The effectiveness such marking and their service life mainly depend formulations thermoplastic compositions technologies production. purpose this work was to evaluate adhesive interaction microdolomite modified by organosilanes resin impart increased operati...

the optimum road spacing has been studied by many researches. it is an important step of forest road network planning. the goals of this study are determining the optimum road spacing in kheiroudkenar forest of nowshahr in northern iran and study of effect of kind of skidder on skidding cost and road spacing. continues time study method was used to determine the production rate of taf and timbe...