Induced by systematic variation of the initial polymer concentration in toluene, various morphologies of aggregates including vesicles, spheres, onion-like structures, and worm-like fibers from a rod-coil-rod triblock copolymer, oligo(p-phenyleneethynylene)-polystyrene-oligo(p-phenyleneethynylene), were observed by transmission electron microscopy.

in this study, 4 different food diets were examined for feeding white worm which were studied. results showed that suitable moisture for growth and development of white worm was 50 - 70 % that their biomass reached to a 675 g/m2 during 90 days. but it decreased significantly at moisture lower than 45 % and upper than 65 %. white worm had similar growth both in acidic and basic area. white worm ...

vermiculture is the culture of earthworms. the goal is to continually increase the number of worms in order to obtain a sustainable harvest. the worms are either used to expand a vermicomposting operation or sold to customers who use them for the same or other purposes. vermicomposting is the process by which worms are used to convert organic materials (usually wastes) into a humus-like materia...

Communication among companies and between clients and companies has been revolutionized by the Internet, e.g., b2b market places, as well as new ways of collaboration like virtual companies. Many systems with holistic and individualized service, sales and marketing concepts are available today. In this paper we give an overview of the basic concepts of office communication, groupware, workflow ...

A teacher by profession, Yakubu has for the past 15 years been a volunteer for the Ghana Guinea Worm Eradication Programme, and one of the biggest obstacles he has had to overcome is the entrenched belief that attributes guinea-worm disease to the will of the gods or witchcraft. “It took some time before I was able to erase these gods, curses and superstitions from their minds,” Yakubu says. Li...

One radiograph of Hunsrück slate shows the presence of a drop-shaped "worm". This image resembles an acoel platyhelminth in the presence of an apparently eversible pharyngeal structure, but no trace can be tound of the complex reproductive structures of platyhelminths, making full identification impossible. Another more elongate worm-like image shows the presence of anterior perforations into a...

in this paper an energy dissipation rate control (edrc) method is introduced, which could provide stable walking or running gaits for legged robots. this method is realized by developing a semi-analytical pattern generation approach for a robot during each single support phase (ssp). as yet, several control methods based on passive dynamic walking have been proposed by researchers to provide an...

in this article a new and an accurate method for kinematic and dynamic analysis of a parallel robot 3prs and a hybrid robot (parallel and serial) 3prs-rrp are presented, which is based on the denavit-hartenberg transformation matrix algebra. first, basic properties of various kinds of robots are compared, and then the denavit-hartenberg parameters and their table are introduced. next, the metho...