One of the most interesting UMTS networks features is their integration with the 2G networks that provides seamless Endto-End services. Current widely deployed 2G and 3G networks provide InterRAT (Inter Radio Access Technology) mechanisms enabling interoperability between them in a manner that is almost transparent to the subscriber. These enable maximum benefit from 3G services while ensuring ...

We conjecture that every signed graph of unbalanced girth 2g, whose underlying graph is bipartite and planar, admits a homomorphism to the signed projective cube of dimension 2g−1. Our main result is to show that for a given g, this conjecture is equivalent to the corresponding case (k = 2g) of a conjecture of Seymour claiming that every planar k-regular multigraph with no odd edge-cut of less ...

Let L be a very ample line bundle on a smooth curve C of genus g with 3g+3 2 < degL ≤ 2g − 5. Then L is normally generated if degL > max{2g+2−4h(C,L), 2g− g−1 6 −2h(C,L)}. Let C be a triple covering of genus p curve C′ with C φ → C′ and D a divisor on C′ with 4p < degD < g−1 6 − 2p. Then KC(−φ ∗D) becomes a very ample line bundle which is normally generated. As an application, we characterize s...

Density-functional calculations of the phonon spectrum and electron-phonon coupling in MgB (2) are presented. The E(2g) phonons, which involve in-plane B displacements, couple strongly to the p(x,y) electronic bands. The isotropic electron-phonon coupling constant is calculated to be about 0.8. Allowing for different order parameters in different bands, the superconducting lambda in the clean l...

We have designed, fabricated and tested the second-generation (2G) design of a high-resolution, dynamically programmable analog-to-digital converter (ADC) for radar and communications applications. The ADC chip uses the phase modulation–demodulation architecture and on-chip digital filtering. The 2G ADC design has been substantially enhanced. Both ADC front-end modulator and demodulator, as wel...

This paper presents a new trapped-field magnet made of second-generation high-temperature superconducting (2G HTS) rings. This so-called ring-shape 2G HTS magnet has the potential to provide much stronger magnetic fields relative to existing permanent magnets. Compared to existing 2G HTS trappedfield magnets, e.g. 2G HTS bulks and stacks, this new ring-shape 2G HTS magnet is more flexible in si...

OBJECTIVE This study examined sensory and cognitive processing in adolescents, young adults and older adults, when exposed to 2nd (2G) and 3rd (3G) generation mobile phone signals. METHODS Tests employed were the auditory 3-stimulus oddball and the N-back. Forty-one 13-15 year olds, forty-two 19-40 year olds and twenty 55-70 year olds were tested using a double-blind cross-over design, where ...

The development of cellulosic bioethanol and other second-generation (2G) biofuels has gone through various phases during the last few years. The prospect of technological breakthroughs stimulates extensive research on turning cellulose into bioethanol or biodiesel. Agricultural or forestry residues and some plants, referred to as ‘lignocellulosic energy crops’ or ‘second generation (2G) energy...