background: national transport commission (ntc) classifies train driving as a high-level safety critical job. objective: to assess fitness-for-work among train drivers in yazd, central iran. methods: we evaluated 152 train drivers for their fitness for duty. the results were then compared with ntc guidelines. results: 63.8% of subjects were fit for duty, 34.2% fit subject to review, and 2.0% we...

We devise a semiclassical model to describe the transport properties of low-dimensional fermionic lattices under influence external quantum stochastic noise. These systems behave as resistors, where bulk particle is diffusive and obeys Ohm/Fick's law. Here, we extend previous exact studies beyond one-dimensional limit ladder geometries explore different dephasing mechanisms that are relevant ph...

This paper deals with the analysis of nonlinear circuits that interconnect passive elements (capacitors, inductors, and resistors) resistors exhibiting a range negative resistance. Active are necessary to design physical switch oscillate. We generalize classical passivity theory circuit develop port interconnection for such non-equilibrium behaviors. The approach closely mimics methodology (inc...

To develop a new kind of thermistor with the negative temperature coefficient (NTC) behaviour, Cu/Mo co-doped YFeO3 based ceramics were prepared by wet-chemical synthesis and sintering at 1300?C. The orthorhombic perovskite structure was identified in all XRD analysis. possible valence states Fe, Cu Mo doped compounds examined X-ray photoelectron spectroscopy. By adjusting concentration Cu- Mo-...

The oxidation properties of n-heptane have been investigated by conducting experiments in a laminar flow reactor at pressures 21 and 100 bar, near-stoichiometric ( ? = 0.9 $\varPhi =0.9$ ) fuel-lean conditions 0.1 =0.1$ ), temperatures 450–900 K. At bar stoichiometric conditions, negative temperature coefficient (NTC) region was detected around 600 increased pressure or oxygen concentration, th...

We review a class of methods that can be collected under the name nonlinear transform coding (NTC), which over past few years have become competitive with best linear codecs for images, and superseded them in terms rate-distortion performance established perceptual quality metrics such as MS-SSIM. assess empirical NTC help simple example sources, optimal vector quantizer is easier to estimate t...

Experimental results on thermally induced degradation tests carried out at the relatively low ageing temperatures less than 200 C in NTC ceramic thermistors based on mixed transition-metal manganites (Cu,Ni,Co,Mn)3O4 are discussed. It is first established that, despite of chemical composition and technological features of the investigated ceramics, the stretched-exponential relaxation function ...