Abstract We investigate the possibility that right-handed (RH) sneutrinos and gravitinos can coexist explain dark matter (DM) problem. compare extensions of minimal supersymmetric standard model (MSSM) next-to-MSSM (NMSSM) adding RH neutrinos superfields, with special emphasis on latter. If gravitino is lightest particle (LSP) sneutrino next-to-LSP (NLSP), heavier decays to former plus left-han...

This paper presents construction of a composite right/left-handed (CRLH) transmission line (TL) based bandpass filter using microstrip parallel coupled lines and hairpin lines. For getting high coupling in comparison to conventional edge coupled microstrip line, the floating slot on the ground plane is used. Two configuration named as SOS (short-open-short) the OSO (open-short-open) model are s...

Interest in negative refractive index, or left-handed (LH) materials, has escalated rapidly over the last few years and it now appears that useful LH materials may be realizable in the microwave region. However there is also considerable interest in LH materials for infrared and visible applications. The purpose of this paper is to explore the limitations of LH materials at short wavelengths du...

A new unit cell composite right/left-handed (CRLH) metamaterial using microstrip technology with coupled line is proposed. It is simple and has a small size. The proposed unit cell can be designed in several frequency bands based on its geometrical parameters. The transition from LH to RH shows the balanced condition without the presence of stop band. Two designs for two different frequency ban...

Co-activation of both hemispheres seems to play a critical role in the generation of mirror movements, involuntary muscle contractions opposite to voluntary movements of one hand. The relationship between handedness und mirror movements is unclear. We measured repetitive grip force changes performed at slow and fast frequencies with the active hand and recorded mirror activity in the opposite i...

Using composite right-left handed (CRLH) transmission line concept, a novel miniaturized dual notch band filter (DNBF) is proposed. The suggested DNBF consists of an interdigital transmission line (ITL), split ring resonators (SRRs) and complementary split ring resonators (CSRRs). Since the resonance frequency of the SRRs and CSRRs are quite independent of each other, the dual notch bands of th...