In this paper, shielding effectiveness (SE) of a perforated enclosure with imperfectly conducting walls is evaluated. To this end, first, an accurate numerical technique based on method of Moments (MoM) ispresented. In this method, lossy metallic walls of the enclosure are replaced by equivalent electric surfacecurrent sources. Then, the impedance boundary condition on the imperfectly conductin...

Middle-down mass spectrometry (MS) combined with electron capture dissociation (ECD) represents an attractive method for characterization of proteins and their post-translational modifications (PTMs). Coupling online chromatographic separation with tandem mass spectrometry enables a high-throughput analysis, while improving sensitivity of the electrosprayed peptides and reducing sample amount r...

The most popular lossy image compression method used on the Internet is the JPEG standard. JPEG’s good compression performance and low computational and memory complexity make it an attractive method for natural image compression. Nevertheless, as we go to low bit rates that imply lower quality, JPEG introduces disturbing artifacts. It is known that at low bit rates a down–sampled image when JP...

The most popular lossy image compression method used on the Internet is the JPEG standard. JPEG's good compression performance and low computational and memory complexity make it an attractive method for natural image compression. Nevertheless, as we go to low bit rates that imply lower quality, JPEG introduces disturbing artifacts. It is known that, at low bit rates, a down-sampled image, when...

to study the effects of scale and tillage management on variability of soil properties in adjacent lands of different tillage type, soil sampling was performed linearly along contour line from the middle position of slope with 5 m intervals. in overall, 45 soil samples were collected from a field with conventional up-down tillage and 40 samples from an adjacent filed with contour tillage. soil ...

There is limited research about head injury. In this existing data study, 2443 admission records of 28367 patients that confer to Loghman Medical Center from 1986-1991 were analyzed. Several factors including age, sex, type and cause of injury, mortality and morbidity were investigated. Overall, the most common age group were 20-40 years, but the most common age group in female patients were 3-...

This paper treats the problem of implementing efficiently recursive Horn Clauses queries, including those with function symbols. In particular, the situation is studied where the initial bindings of the arguments in the recursive query goal can be used in the top-down (as in backward chaining) execution phase to improve the efficiency and, often, to guarantee the termination, of the forward cha...