Any local relativistic quantum field theory of Dirac-Weyl fermions conserves CPT . Here we examine whether a simple nonlocal field theory can violate CPT . We construct a new relativistic field theory of fermions, which we call “homeotic”, which is nonlocal but causal and Lorentz invariant. The free homeotic theory is in fact equivalent to free Dirac theory. We show that a homeotic theory with ...

We generalize the rules for the free fermionic string construction to include other asymmetric orbifolds with world-sheet bosons. We use these rules to construct various grand uni ed string models that involve level-3 current algebras. We present the explicit construction of three classes of 3-chiral-family grand uni ed models in the heterotic string theory. Each model has 5 lefthanded, and two...

A novel twin-diamond-shaped antenna is presented for wideband circularly polarized (CP) radiation. By introducing a twin-diamond-shaped patch and a gap-coupled feed structure, a lefthanded circularly polarized (LHCP) antenna in bore-sight direction is obtained. The gap-coupled feed structure consists of a horizontal microstrip arm of approximately 0.285λ0 at the centre frequency and two small d...

In this contribution a tunable via-free microstrip composite right/lefthanded transmission line (CRLH-TL) is designed and simulated. To add tunability RF MEMS elements are implemented in the interdigital capacitors and stub inductors, which match the line impedance during tuning. The via-free design enables easy and low-cost fabrication. Additionally, tunable zero-order resonators (ZORs) using ...

In an auditory or musical memory task, subjects made pitch recognition judgments when the tones to be compared were separated by a sequence of interpolated tones. The left-handed subjects performed significantly better than the righthanded and also had a significantly higher variance. Further analysis showed that the superior performance was attributable largely to the left-handed subjects with...

In this work the usage of a composite right/lefthanded (CRLH) metamaterial transmission line resonator as a transmit/receive coil for 7 Tesla magnetic resonance imaging (MRI) is investigated. On the basis of zeroth-order resonant antennas (ZORAs) a zeroth-order resonant coil (ZORC) was designed. Due to a constant current distribution along the element, a homogenous magnetic field is achieved in...

An expression for the electromagnetic field energy density in a dispersive, lossy, lefthanded metamaterial, consisting of an array of split-ring resonators and an array of wires is derived. An electromagnetic field with general time-dependence is considered. The outcome is compared with previously published results. In the absence of losses, agreement with the general result for the energy dens...

If a light gluino, with a mass of the order of GeV, exists in the minimal supersymmetric extension of the Standard Model, then it can contribute to the production rate of the top quark pairs at hadron colliders via g̃g̃ → tt̄. Because the top quark is heavy, the masses of the superpartners of the lefthanded and right-handed top quarks can be very different such that a parityviolating observable ca...

To ensure safe exploitation of the Muduchaideng Mine, we use a numerical simulation to invert in situ stress field based on observation data from GPS stations, investigate differences movement velocities at different locations, and analyze lefthanded area around wellfield. The relationship between difference motion velocity was explained through theoretical analysis. law distribution studied us...

An effective development of a dual composite right/lefthanded (D-CRLH) leaky-wave (LW) structure for dual-polarized antenna application is presented. The dual-polarized antenna consists of a two-section 3-dB rat-race hybrid and two symmetrical substrate integrated waveguide lines. Each of the waveguide lines is periodically loaded with 15 transverse slots and 15 longitudinal slots. The dualpola...