We use tomographic techniques to make a 3-D reconstruction of Jupiter’s synchrotron radiation belts from Very Large Array observations at 20 cm. As in earlier observations with the Australia Telescope Compact Array, this reconstruction shows that the equatorial belt is not symmetric or planar, but is warped. The warp is related to the φ component of the magnetic field, or equivalently the magne...

In this paper, we are discussing the effect of the use of magnetic compasses on the orientation of ancient Chinese architectonical complexes. As Czech researchers proposed in 2011, assuming these complexes ideally oriented by the ancient architects along north-south direction, in the case that the surveys were made by means of magnetic compasses, we can find the axes of the complexes deviating ...

The power spectrum of airborne magnetometer total intensity field profiles can be used to determine average depth values to buried magnetic rocks. These depths are established from the slope of the log-power spectrum at the lower end of the total wavenumber, or spatial frequency band. The method is based on the assumption that the magnetic effect of the basement surface can be simulated by an u...

Night migratory songbirds can use stars, sun, geomagnetic field, and polarized light for orientation when tested in captivity. We studied the interaction of magnetic, stellar, and twilight orientation cues in free-flying songbirds. We exposed Catharus thrushes to eastward-turned magnetic fields during the twilight period before takeoff and then followed them for up to 1100 kilometers. Instead o...

The orientations of buildings at the ancient Mesoamerican temple centers of Teotihuacan, Tula, Chichen Itza, Palenque, Tikal, Copan, and Monte Alban were plotted against the past magnetic declination for that region to test the possibility that they were constructed to align with magnetic north. Archaeomagnetic data did not extend back far enough for a check of Olmec buildings, the most likely ...

In the 1700s, scientists, sailors, engineers and explorers were trying to work out how to navigate east to west at sea. The stakes were high; many lives were lost because sailors could not reliably measure longitude. Eventually, the invention of accurate timepieces allowed sailors to use the time in their current location, and the time at a fixed reference, to calculate longitude. But how do lo...

This study investigates F0 declination as a global-level prosodic phenomenon, establishing a new discourse-based model of prosodic structure in Japanese. The model includes two levels of declination in a hierarchical order: utterance units and prosodic paragraphs, a higher level of declination consisting of embedded declinations. Comparing and contrasting three types of discourse -read speech, ...