A study of rational maps of the real or complex projective plane of degree two or more, concentrating on those which map an elliptic curve onto itself, necessarily by an expanding map. We describe relatively simple examples with a rich variety of exotic dynamical behaviors which are perhaps familar to the applied dynamics community but not to specialists in several complex variables. For exampl...

For small excursions of an electron within a continuous focusing ion channel, the phase advance of the socalled betatron oscillations of that electron–equivalent to the number of oscillations per unit length of that electron about the central restoring force of the ion’s space-charge force in the blowout regime–are independent of the (negligible) amplitude of its radial excursion. Here, we comp...

The Wisconsin Hα Mapper (WHAM) Northern Sky Survey has revealed a loop of H II reaching 1300 pc from the Galactic midplane above the Cas OB6 association in the Perseus sprial arm. This enormous feature surrounds and extends far above the “W4 Chimney” identified by Normandeau et al. and appears to be associated with the star formation activity near the W3/W4/W5 H II region complex. The existence...

There are few, if any, men who would qualify for the position of Playboy bunny, and there are few, if any, women who would qualify for the position of male lead in a motion picture. However, there are many other occupations in which gender may be irrelevant. People in these jobs include nurses, truck drivers, lawyers, secretaries, and economists. Why is it, then, that these jobs are each charac...

The unexpected faintness of distant Type Ia Supernovae (SNe) has been used by many to argue for an accelerated expansion of the universe. However, observations of nearby SNe show high velocity and polarized features in all SNe Ia, indicating that the single degenerate paradigm for Type Ia SNe is drastically and catastrophically invalid. By now it is also clear that an extreme version of the axi...

With the rapid development of the oil industry and oil transportation, oil well blowout and marine oil spill accidents ca·used a lot of environmental damage in recent years, so there is a growing demand for oil spill disaster emergency response. It is difficult to monitor oil spill by conventional ways in real time due to the large range of oil spill, so remote sensing technology becomes the mo...

Abstract In this paper we investigate, from a graph theoretical point of view, the notion acceptability in Dung semantics for abstract argumentation frameworks. We advance state art by introducing and analyzing combinatorial structures exploited taming, particular cases, exponential blowout acceptance algorithms. conclude series observations allowing to deepen intuition with respect practical u...