Abstract: A multi junction photovoltaic device is disclosed. In certain examples, the device includes an upper photovoltaic cell comprising a first plurality of layers of films, including a first active layer of a chalcogenide having a first lattice constant and first energy band gap, and a lower photovoltaic cell disposed below the upper photovoltaic cell and adapted to receive photon radiation passing through the upper photovoltaic cell, and comprising a second plurality of layers of films, including an active second layer of a IB-IIIA-chalcogenide having a second lattice constant and a second energy band gap. The first lattice constant differs from the second lattice constant by no more than about 10%. The first energy band gap can be greater than the second energy band gap by at least about 0.5 eV, or 0.6 eV, or 0.7 eV.

Abstract: A device useful for oral drug delivery device consisting of: (a) a capsule, tablet or pill designed to disperse in the gastrointestinal system; (b) an RFID tag positioned in the capsule, tablet or pill, the RFID tag comprising an antenna; (c) an object selected from the group consisting of a magnet, a ferromagnetic object, a ferrite object and an electromagnetic shielding object positioned within, over or adjacent the antenna of the RFID tag to alter the antenna characteristics of the RFID tag so that if the RFID tag is interrogated before the capsule, tablet or pill disperses in the gastrointestinal system, the response of the RFID tag is sufficiently altered or attenuated to determine that the capsule, tablet or pill has not dispersed in the gastrointestinal system and so that if the RFID tag is interrogated after the capsule, tablet or pill has dispersed in the gastrointestinal system, the object separates from the RFID tag so that the response of the RFID tag is sufficiently detectable to determine that t

Abstract: This invention relates to structures which display negative magnetic permeability in response to a relatively broad range of wavelengths. This invention further relates to manufacture of negative magnetic permeability or negative electric permittivity structures by rapid prototyping methods. Finally, this invention relates to structures which display negative permittivity and negative permeability and are open cell structures.