Search for the Standard Model Higgs Boson in ATLAS

The latest search for the Standard Model (SM) Higgs boson based on 4.7-4.9 fb-1 of pp collision data at sqrt(s)=7 TeV recorded with the ATLAS detector is presented here.Comment: To appear in the conference proceedings of XX International Workshop on Deep-Inelastic Scattering and Related Subjects, Bonn, Germany, 26 - 30 Mar 201

Searches for Beyond the Standard Model Higgs Bosons in ppbar collisions at sqrt{s}=1.96 TeV

The recent results on various Beyond the Standard Model (BSM) Higgs boson searches performed by the DZERO experiment at the Tevatron are presented here. In particular, the Higgs bosons in supersymmetric models and fermiophobic scenario have been investigated. No significant excess over the Standard Model (SM) expectations have been observed and accordingly limits have been established on the corresponding model parameters.Comment: To appear in the AIP conference proceedings for Susy09, the 17th International Conference on Supersymmetry and the Unification of Fundamental Interaction

Evaluation of voice codecs for the Australian mobile satellite system

The evaluation procedure to choose a low bit rate voice coding algorithm is described for the Australian land mobile satellite system. The procedure is designed to assess both the inherent quality of the codec under 'normal' conditions and its robustness under 'severe' conditions. For the assessment, normal conditions were chosen to be random bit error rate with added background acoustic noise and the severe condition is designed to represent burst error conditions when mobile satellite channel suffers from signal fading due to roadside vegetation. The assessment is divided into two phases. First, a reduced set of conditions is used to determine a short list of candidate codecs for more extensive testing in the second phase. The first phase conditions include quality and robustness and codecs are ranked with a 60:40 weighting on the two. Second, the short listed codecs are assessed over a range of input voice levels, BERs, background noise conditions, and burst error distributions. Assessment is by subjective rating on a five level opinion scale and all results are then used to derive a weighted Mean Opinion Score using appropriate weights for each of the test conditions

A complete characterization of Birkhoff-James orthogonality in infinite dimensional normed space

In this paper, we study Birkhoff-James orthogonality of bounded linear operators and give a complete characterization of Birkhoff-James orthogonality of bounded linear operators on infinite dimensional real normed linear spaces. As an application of the results obtained, we prove a simple but useful characterization of Birkhoff-James orthogonality of bounded linear functionals defined on a real normed linear space, provided the dual space is strictly convex. We also provide separate necessary and sufficient conditions for smoothness of bounded linear operators on infinite dimensional normed linear spaces

On extreme contractions between real Banach spaces

We completely characterize extreme contractions between two-dimensional strictly convex and smooth real Banach spaces, perhaps for the very first time. In order to obtain the desired characterization, we introduce the notions of (weakly) compatible point pair (CPP) and $\mu-$compatible point pair ($\mu-$CPP) in the geometry of Banach spaces. As a concrete application of our abstract results, we describe all rank one extreme contractions in $\mathbb{L}(\ell_4^2, \ell_4^2)$ and $\mathbb{L}(\ell_4^2, \mathbb{H})$, where $\mathbb{H}$ is any Hilbert space. We also prove that there does not exist any rank one extreme contractions in $\mathbb{L}(\mathbb{H}, \ell_{p}^2),$ whenever $p$ is even and $\mathbb{H}$ is any Hilbert space. We further study extreme contractions between infinite-dimensional Banach spaces and obtain some analogous results. Finally, we characterize real Hilbert spaces among real Banach spaces in terms of CPP, that substantiates our motivation behind introducing these new geometric notions.Comment: 16 page

Testing local-realism and macro-realism under generalized dichotomic measurements

Generalised quantum measurements with two outcomes are fully characterised by two real parameters, dubbed as sharpness parameter and biasedness parameter and they can be linked with different aspects of the experimental setup. It is known that precision of measurements, characterised by the sharpness parameter of the measurements, reduces the possibility of probing quantum features like violation of local-realism (LR) or macro-realism (MR). Here we investigate the effect of biasedness together with sharpness of measurement and find a trade-off between those two parameters in the context of probing violation of LR and MR. Interestingly we also find the above mentioned trade-off is more robust in the later case.Comment: 10 pages, 3 figure