In the literature, chipless RF identification (RFID) tags are mostly characterized at normal incidence, where 3D spherical reading zone of RFID has not been characterized. this paper, compact measurement systems for characterization scatterers in read range presented. Customized support structures realized commercial multi-probe system StarLab from MVG to construct bistatic and monostatic syste...

We generally investigate a new class of scalar field model with the lagrangian L = F (X) − V (φ). We find that it is the square potential(with a negative minimum) drives the usual linear field solution while in K-essence model the potential should be taken as a inverse square form. The linear field solution model is isomorphic with a special model where its sound speed diverges. We find that ou...

The Moller operators and the asociated Lippman-Schwinger equations obtained from different partitionings of the Hamiltonian for a step-like potential barrier are worked out, compared and related.

background and purpose: salmonella is a group of enterobacterias that cause infectious diseases in human and animals. typhoid, bacteremia, enterocolitis and salmonellosis which are caused by this bacterium are considered major health concerns in developing countries, such as iran. quick, accurate, reliable and early diagnosis is vital to prevent salmonella outbreak. materials and methods: there...

we investigated the use of dna amplification by polymerase chain reaction (per) for detection of mycobacterium tuberculosis in 300 patients who were suspected of having pulmonary tuberculosis and compared the results with culture results which were performed in parallel with pcr. two-thirds of each sample was processed for smear and culture by standard methods and one-third was prepared for dna...

background: the ultrasonography probes are cleaned by absorbent soft, dry cloth. this question arose whether linear and convex ultrasound probes coupling with gel could perform as a means for nosocomial infections transmission, and which method is economical and more efficient for cleaning the probes. this study was conducted to answer these questions. methods: one hundred – ninety two patients...

Eddy current induced in a metal by a coil carrying an alternating current may be perturbed by the presence of any macroscopic defects in the material, such as cracks, surface indentations, or inclusions. In eddy-current nondestructive evaluation, defects are commonly sensed by a change of the coil impedance resulting from perturbations in the electromagnetic field. This paper describes theoreti...

this work presents the heat transfer characteristics of a new type of porous radiant air heater that operates on the basis of effective energy conversion method between flowing gas enthalpy and thermal radiation. at each layer, the gas and solid phases are considered in non-local thermal equilibrium, and combustion in the porous radiant burner is modeled by considering a non-uniform heat genera...