For any wire-grid model, a fundamental question is the choice of the optimum wire radius and grid spacing. The most widely used criterion to fix the wire size is the so-called same-area rule [2], coming from empirical observation: the total surface area of the wires has to be equal to the surface area of the object being modelled. However, just few authors have investigated the validity of this...

The paper describes new approach of potentiostat for very low sensor current measurements. Recent potentiostats were used as measurement devices which were standalone and sensors were connected by a screened wire. These concepts are inconvenient for the presented very low current measurements. The new approach is based on the potentiostat circuitry integrated on a chip that should be directly c...

Subsea processing of oil/gas is performed by production system facilities, which are linked into a complete subsea connectors. High reliability and long service life the connectors, defined strict requirement deepwater oil fields, raise challenge design structure components to ASME-VIII code has been applied. The theoretical problems main parameters connector's hub detailed in this paper compar...

The paper presents a dynamic loading analysis of material carried out by the exploding wire method (EWM). A composite cylinder is chosen as an experimental sample. It thick-walled made polymethyl methacrylate with axial bore formed therein, pressed into aluminium shell. sample was loaded applying electric voltage to conductor in form copper placed inside An equation state for explosion obtained...

We report on the study of fast-neutron background for the BIFROST spectrometer at ESS. We investigate the effect of background radiation induced by the interaction of fast neutrons from the source with the material of the neutron guide and devise a reasonable fast, thermal/cold neutron shielding solution for the current guide geometry using McStas and MCNPX. We investigate the effectiveness of ...

the effective factors of forward speed, cylinder rotation, and clearance between a combine’s cylinder and concave on wheat kernel breakage and seed germination were studied in karaj area using a 955 model john dear combine. this study was conducted on three levels of adjustment for each of the variables, 1.2, 1.8 and 2.5 km/hr for forward speed, 800, 900, 1000 rpm for cylinder rotation as well ...

Abstract A novel multi-phase-lags model with fractional order derivative is introduced to study a thick hollow cylinder two temperatures under the influence of magnetic field and rotation. The basic non-dimensional equations problem are discussed by using harmonic wave analysis. Numerical computations carried out help Matlab software. Comparisons made results refined-phase-lag theory for differ...