ADIFFERENCE has been observed in certain instances between the onset of QRS in intracavitary and surface limb leads. Simultaneous tracings demonstrate that when premature ventricular depolarization exists the early rapid growth in magnitude of potential recorded by intracavitary leads may be nearly or totally inapparent in surface leads. Following premature depolarization changes occur in intra...

On page 108 of For Space, an impassioned book that discloses the theoretical and political challenges of thinking space, a map of part of the South-East of England is inscribed with a very simple if perhaps initially puzzling phrase: The phrase recalls Rene Margritte’s famous inscription below a painting of a pipe: ‘ceci n’est pas une pipe’ (this is not a pipe). Initially, like Margritte’s phra...

We review the research on photonic crystal fiber modal interferometers with emphasis placed on the characteristics that make them attractive for different sensing applications. The fabrication of such interferometers is carried out with different post-processing techniques such as grating inscription, tapering or cleaving, and splicing. In general photonic crystal fiber interferometers exhibit ...

good investigator knows that the best insights come when they are least needed. When your mind is centered on a particularly excruciating problem, you more often than not suddenly have a penetrating insight on a thing that has absolutely no relevance to the issue at hand. I was sitting at my desk this morning, staring at an arbitrary point in space, when I found myself focusing on the office do...

in the architecture of iranian traditional houses, the ornamentations available in the inscriptions of houses entrance portal express the identity of architects and personality of houses owners and are rooted in their religious and national beliefs and faiths. the main hypothesis of this research is changing the physique and application of religious contents in compliance with the thoughts and ...