Introduction Traveling waves inside a bore of a scanner can propagate as RF modes of cylindrical or coaxial waveguides. The traveling-wave (TW) concept may offer large FOV [1], new encoding mechanisms [1-3], and more comfortable environment for patients. Since MR scanners have cylindrical symmetry, the waveguides are ideally suited for far-field traveling waves MR experiments. For MR scanners, ...

studies on vegetation changes of rangelands under grazed and non-grazedconditions are of great importance in the range management planning programs. to determinethe change process of vegetation, this study was performed in inche shorezar site of golestanprovince for nine years (1997-2005). the vegetation parameters were measured every year inseveral fixed plots inside and adjacent of exclosures...

A novel and practical acoustic energy harvesting mechanism to harvest traveling sound at low audible frequency is introduced and studied both experimentally and numerically. The acoustic energy harvester in this study contains a quarter-wavelength straight tube resonator with lead zirconate titanate (PZT) piezoelectric cantilever plates placed inside the tube. When the tube resonator is excited...

the writers of this article have compared the satisfaction level of international tourists who traveled to isfahan for the first time and those who have repeatedly traveled to this city. one hundred and sixty tourists were selected randomly in 2002 and the data gathered through filling questionnaires. the result is surprising and indicates that the satisfaction level for those who have repeated...

Acoustofluidics offers contact-free manipulation of particles and fluids, enabling their uses in various life sciences, such as for biological medical applications. Recently, there have been extensive studies on acoustic streaming-based acoustofluidics, which are formed inside a liquid agitated by leaky surface waves (SAWs) through applying radio frequency signals to interdigital transducers (I...

A survey of adolescents (N = 1,488) documented third-person perception (TPP) regarding Facebook use and cyber bullying. As Facebook establishes itself as the dominant social network, users expose themselves to a level of bullying not possible in the analog world. The study found that 84% of adolescents (middle school through college undergraduates) use Facebook, and that most users log on daily...

The challenge of combining these candidates to design an ideal medicine against malaria (Table 5) is formidable. There are still many unknown factors, not the least of which is that only a limited number of new classes of molecules have reached clinical evaluation. It is clear that a single molecule can have more than one attribute: a molecule can for example meet the criteria of more than one ...