In the initial phase of coffee crop, control weeds and water availability for establishment plants is a concern. The polyethylene cover can positively influence chemical biological characteristics soil and, consequently, root system. objective this work was to evaluate morphology system using mulching different widths colors. Coffee planted in December 2016 cultivar Topázio MG-1190. A randomize...

A novel 12-station hip joint simulator with an anatomic position of the prosthesis was designed and built. The motion of the simulator consists of flexion-extension and abduction-adduction. The load is of the double-peak type. The validation test was done with three similar 28 mm CoCr-polyethylene joints in diluted calf serum lubricant for 3.3 x 10(6) cycles. The bearing surfaces of the polyeth...

Film coating solutions containing different grades of HPMC (E5, E15 and E50) with and without polyethylene glycol (with various molecular weights) were examined by an oscillatory method, using Haake CV 100 rheometer. Fundamental rheological parameters (?, G? and G² ) were measured over the frequency range from 0.04 to 2 Hz. The variation with frequency of the loss tangent (a ratio of viscous to...

The automated separation of plastic waste fractions intended for mechanical recycling is associated with substantial investments. It is therefore essential to evaluate to what degree separation really brings value to waste plastics as raw materials for new products. The possibility of reducing separation requirements and broadening the range of possible applications for recycled materials throu...

Novel actuator materials are necessary to advance the field of soft robotics. However, since current solutions limited in terms strain, strain rate, or robustness, a new type was developed. In its basic configuration, this consisted four layers and self-coiled into helix after pre-stretching. The principle dielectric polymer actuator. Instead an elastomer, thin thermoplastic film, case polyethy...

We demonstrate the synthesis of monolayer graphene using thermal chemical vapor deposition and successive transfer onto arbitrary substrates toward transparent flexible conductive film application. We used electron-beam-deposited Ni thin film as a synthetic catalyst and introduced a gas mixture consisting of methane and hydrogen. To optimize the synthesis condition, we investigated the effects ...