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Non-evaporable getters (NEG) chambers are 316L vacuum chambers coated with a TiZrV layer, widely used in accelerator systems. This particular alloy works, when thermally activated, as a linear pump for almost all gas species inside the chamber: molecules are adsorbed on the surface or ... Mehr lesen
The design of a right contour/structure of the NFC-antenna is presented. The NFC-reader-antenna is applied later to communicate with the NFC-tag (transponder) of a smart phone placed in the phone box of the car. The NFC-reader-antenna with selected contour is printed directly on the PCB ... Mehr lesen
Food dehydration processes assisted by high-power ultrasound (HPU) have become an efficient technology with a great potential in its implementation. To produce the desired effects in the samples, it is necessary that the dehydration system, composed by a HPU transducer and an ultrasonic ... Mehr lesen
When concrete is subjected to high temperature, capillary water evaporates and chemically bound water is released due to dehydration. This results in an increase of pore pressure, which is believed to be one of the mechanisms leading to spalling. Spalling of concrete is of high concern ... Mehr lesen
Plasma torches are used in processing of materials as well as in the energy industry for producing plasma. In a non-transferred arc plasma torch, an electric arc can be initiated by applying a direct current (DC) between the cathode and anode, both placed inside the torch. Then, the ... Mehr lesen
A model for coupled heat and mass transfer in porous, capillary-active materials is validated against experimental data obtained by drying calcium silicate specimens. The accuracy of the numerical solution is qualitatively investigated by considering mass conservation for a set of ... Mehr lesen
Solar thermal energy, compared to fossil fuels, is an environmentally friendly alternative for heating and hot water production. Recent research suggests that polymeric materials can be a cost-saving and environmentally friendly alternative to the common metals used in solar thermal ... Mehr lesen
In this paper, the "Morton Effect" is analyzed. This phenomenon is a particular kind of rotor instability due to non-uniform journal bearing heating. In this paper, an overview of the previous works has been done. After this preliminary study, a specific approach suggested by the ... Mehr lesen
Despite the traditional separation between the studies of surface water and groundwater flows, it has been long recognized that rivers and aquifers are strongly connected and that their interaction gives rise to a continuous exchange of water and solutes. The volume within the porous ... Mehr lesen
This work shows the finite element implementation of a constitutive model which can represent the chemo-thermomechanical aging of rubber. This approach considers the nonlinear thermo-viscoelastic behavior of rubber, is formulated for finite deformations in the continuum mechanical ... Mehr lesen