BACKGROUND Public health officials and journalists play a crucial role in disseminating information regarding natural disasters, terrorism and other human-initiated disasters. However, research suggests that journalists are unprepared to cover terrorism and many types of natural disasters, in part because of lack sufficient expertise in science and medicine and training. The objective of this r...

A rapid hot press system in which the heat is supplied by RF induction to rapidly consolidate thermoelectric materials is described. Use of RF induction heating enables rapid heating and consolidation of powdered materials over a wide temperature range. Such rapid consolidation in nanomaterials is typically performed by spark plasma sintering (SPS) which can be much more expensive. Details of t...

Equal Channel Angular Pressing (ECAP) is currently being widely investigated because of its potential to produce ultrafine grained microstructures in metals and alloys. A sound knowledge of the plastic deformation and strain distribution is necessary for understanding the relationships between strain inhomogeneity and die geometry. Considerable research has been reported on finite element analy...

In this paper we present a numerical solution for the mathematical modeling of the hot-pressing process applied to medium density fiberboard. The model is based in the work of Humphrey [1982], Humphrey and Bolton [1989] and Carvalho and Costa [1998], with some modifications and extensions in order to take into account mainly the convective effects on the phase change term and also a conservativ...

Finite-element simulation of the hot pressing process has been performed using ABAQUS. The viscoelastic polymer (polymethyl methacrylate) used in this study has mechanical properties that depend on the temperature and working pressure. Based on the nonlinear viscoelastic model, the polymer material behaviour is simulated successfully with the data obtained from material tests. Simulation result...

On the basis of experimental and practical material it was determined that scratches were formed as a result of sliding of rough surface or sharp point along the body. In case of slight pressing narrow almost linear injuries occur in the form of chains which consist presumably of angle-shaped tears of epidermis with the bases directed to movement side. Considerable pressing results in continuou...

Lever pressing rate under a continuous reinforcement schedule for food reward in rats was reduced significantly by cyproheptadine in the dose of 5 and 10 mg/kg body weight. Under fixed ratio schedule of reinforcement, the responding was also suppressed significantly by 5 and 10 mg/kg body weight doses of cyproheptadine. However, high dose (20 mg/kg) of cyproheptadine administered subsequent to ...

The goal of this study was to clarify the role of the nucleus accumbens septi (NAS) in the expression of cocaine self-administration behaviors. Rats were trained in a continuous reinforcement schedule to press a lever to activate a pump that provided an intravenous injection of cocaine. Once the rats were trained, neuronal activity in the NAS was monitored during cocaine self-administration wit...

The field of in-pipe robotics covers a vast and varied number of approaches to the inspection of pipelines with robots specialising in pipes ranging anywhere from 10 mm to 1200 mm in diameter. Many of these developed systems focus on overcoming in-pipe obstacles such as T-sections and elbows, as a result important aspects of exploration are treated as sub-systems, namely shape adaptability. One...

This paper is based on an interaction analysis of video recordings of seniors being instructed in the use of texting. Learning to text is a complex ordeal for the elderly, which not only involves grasping such complex phenomena as hierarchically organized menus and text prediction technology, but also more mundane and seemingly simple skills as pressing the keys. The latter is the primary focus...