Abstract The direct blending of polyether ether ketone (PEEK) with a solid lubricant such as polytetrafluoroethylene (PTFE) improves its tribological performance, but compromises outstanding mechanical properties and processability. While these negative effects might be circumvented via the hybrid wear method, influence contact temperature between multiple sliding components acting together is ...

In this paper, we have studied the electrical properties of the randomly distributed metallic (Co and Fe) nano/ micro wires on Silicon substrate. Deposition was carried out potentiostatically into the pores of the track-etch polycarbonate membrane spin coated onto the Si substrate. Spin coated films were irradiated with 150MeV Ni (+11) ions at a fluence of 8E7 ions/cm2, followed by UV irradiati...

in this paper, using annular resonator we have designed an adding and dropping filter light based ontwo-dimensional photonic crystals. the shape of ring resonator filter adding and dropping that wehave proposed is race track. this filter has a hexagonal lattice structure of silicon bars withrefractive index 3/46 that is located in the context of air with refractive index 1. transmissionefficien...

background: radon is an odourless, colourless and tasteless gas and it is the first cause of lung cancer among non- smokers. the assessment of the level of radium in building materials helps in understanding the radiological implications. it has been observed that everyone has some levels of exposure to them. therefore measurement of radium and radon in the soil samples are important from publi...

background: the fatal effect of ionizing radiation on cells depends on linear energy transfer (let) level. the distribution of ionizing radiation is sparse and homogeneous for low let radiations such as x or γ, but it is dense and concentrated for high let radiation such as heavy-ions radiation. material and methods: chinese hamster ovary cells (cho-k1) were exposed to 4 gy fe-ion 2000 kev/m. ...

• It exploits the vertical axle-box vibration acceleration signal that it is helpful to simplify hardware of monitoring system high-speed train. The proposed angular synchronous average technique perfectly enhances fault-related wheel polygon wear by mitigating asynchronous coherent and random background noise. method can detect order rough degree railway polygonization fault in real-time. (PWR...

The geometry of a ballasted railway gradually deteriorates with trafficking, mainly as result the plastic settlement track-bed (ballast and sub-base). rate amount depend on number factors, for various reasons are difficult to predict or estimate analytically. As result, empirical equations estimating development track train passage have been proposed. A review these shows that they (i) do not r...