This research evaluates the behavior of plaster with a water-repellent additive when submitted to natural aging process. Casting and silane/siloxane-based were used as materials. The water/plaster ratio was set at 0.7 contents 0.2% 0.4% used, in relation mass. Plaster pastes without (reference) containing mass evaluated ‘zero’ age after 30, 60, 90, 120, 150 days aging. After aging, it observed ...

This paper provides an overview of propagation studies beyond 100 GHz in the Terahertz Communications Lab in Braunschweig and the results achieved so far. In particular, rough surface reflections are investigated. The example is concrete plaster. Also the effect of multiple reflections in layered media is studied. The investigated material is wall paint on plaster. Index Terms — THz communicati...

plasters are produced from a light refractory material, mainly mgo (m.p. 2800ºc), a binder, and a void forming substance for insulating purposes. different oxides from the slag penetrate into these voids and provide low melting-point phases suchasrhodonite (mnsio3) (1290ºc), tephorite (mn2sio4) (1345ºc), merwinite (ca3mgsi2o8) (1575ºc), monticellite (camgsio4) (1490ºc), and enstatite (mgsio3) (...

in this study, behavior of pin-loaded glass fiber reinforced with polyethylene laminated composites with different stacking sequence and different dimensions has been observed experimentally and stress analysis was performed using ansys software. the aim is to investigate stresses, failure strength and failure mode of composite laminates containing a pin loaded hole when the material exhibits l...

a total of 68385 live pin-worm eggs from adhesive scotch tape were exposed to different detergent powders in under to compare method of detergent washing clothes with the boiling method for the control of family enterobiasis. results show that: a) 80.4-100 percent of eggs are destroyed after hatching within 6-8 hours of exposure to 0.25 gr% detergent at 10-250c. exposure for less than 6 hours h...

BACKGROUND The treatment of idiopathic congenital vertical talus has traditionally consisted of manipulation and application of casts followed by extensive soft-tissue releases. However, this treatment is often followed by severe stiffness of the foot and other complications. The purpose of this study was to evaluate a new method of manipulation and cast immobilization, based on principles used...

background: in children, inappropriate treatment of open femoral fractures may induce several complications. a few studies have compared the external fixator with flexible intramedullary nails in high-grade open femoral fractures of children. the present study aims at comparing results of these two treatment methods in open femoral fractures. methods: in this descriptive analytical study, 27 pa...

BACKGROUND Pedicled fl aps can still be a useful part of the reconstructive surgical toolbox. Their stabilisation is crucial to prevent shearing forces causing fl ap failure. This can be challenging using traditional dressings so different stabilisation methods have been described including plaster of Paris and topical negative pressure dressings. These are disadvantaged by limiting fl ap obser...

in this work the performance of a wavelength division multiple access (wdma) system with direct detection receiver is investigated. for this purpose, the probability of error in a wdma network with ook modulation considering crosstalk, isi, photo detector noise and thermal noise is calculated and the effect of each on system performance is investigated. the system performance in presence of pin...