Trapped Coronal Magnetogravity Modes Theoretical analyses suggest a physical scenario for the trapping of coronal magnetogravity wave modes above the solar transition region. The shortest oscillation period of coronal magnetogravity modes should be longer then about 1.5hours. These long-period modes may be responsible for the unexpected low-frequency (1 to 140microhertz) discrete modes recently discovered in interplanetary charged particle fluxes and magnetic field fluctuations. If the detected modes are caused by these magnetogravity modes rather than by gravity mode oscillations in the solar interior, then the solar corona and the transition region may be probed from an entirely new perspective by helioseismological techniques. These coronal magnetogravity modes could reveal clues to the heating and dynamics of the solar corona. /*---------------------------------------------------------------------*/ Probing Electrical transport in Nanomaterials: Conductivity of Individual carbon nanotubes A general approach has been developed to determine the conductivity of individual nanostructures while simultaneously recording their structure. conventional lithography has been used to contact electrically single ends of nanomaterials, and a force microscope equipped with a conducting probe tip has been used to map simultaneously the structure and resistance of the portion of the material protruding from the macroscopic contact. Studies of individual carbon nanotubes demonstrate that the structurally most perfect nanotubes have resisitivities an order of magnitude lower than those found previously and that defects in the nanotube structure cause substantial incresases in the resistivity. Nanometer scale structures and molecular materials are of great interest as potential building blocks for future generation electronic devices of greatly reduced size. Rational design of any device will require a fundamental understanding of the properties of these materials and how they depend on dimensionality and size. The electrical and mechanical properties of carbon nanotubes have generated considerable interest and speculation , although direct measurements of the intrinsic resistivity and mechanical strnegth of individual nanotubes has been difficult. Likewise, the term molecular wire has been widely applied to anisotropic molecular materials. But the meaning of this term relative to an absolute conductivity remains unclear. The difficulty is in connecting measuring devices from the macroworld to nanometer scale materials, for which two or more connections are needed. Electrical measurements of nanomaterials use this approach to determine the resistivity of individual carbon nanotubes. Our method combines conventional lithography, to electrically contact single ends of nanotubes, and a force microscope equipped with a conducting probe tip, to map simultaneously the structure and resistance of the portions of nanotube that protrude from the macroscopic contact. Defects in the nanotube structure cause substantial increases in the resistivity, and the structurally most perfect nanotubes have resistivities an order of magnitude lower than those found previously.