Canonical Constraints on Leptonic Cp Violation using UHCR neutrino fluxes

It is shown that one can in principle constrain the CP-violating parameter delta from measurements of four independant |V_{ij}|^2, or three of them and a ratio, in the leptonic sector. To quantify our approach, using unitarity, we derive simple expressions in terms of four independant |V_{ij}|^2 for cos(delta) and an expression for sin^2(delta) from J^2. Thus, depending on the values of |V_{ij}| and their accuracy, we can set meaningful limits on |delta|. To illustrate numerically, if |V_{u1}|^2 is close to 0.1 with a 10% precision, and if |V_{e3}^2 is larger than 0.005 and for values of |V_{e2}|^2 and |V_{u3}|^2 that stay within +-0.1 of the current experimental data leads to a bound pi/2 < |delta| < pi. Alternatively, a certain combination of parameters with values of |V_{e3}|^2 larger than 0.01 leads to a closed bound of 73 < |delta| < 103. In general, we find that it is better to use |V_{u1}|^2 or |V_{t1}|^2 as the fourth independant |V_{ij}|^2 and that over most of the parameter space, delta is least sensitive to |V_{e3}|^2. With just three independant measurements (solar, atmospheric and reactor) it is impossible to set limits on the CP phase. In this respect, we study the use of ultra high energy cosmic (UHCR) neutrino fluxes as the additional fourth information. We find that within the SM, neutrino fluxes of all three flavours will be very similar but that pushing current neutrino data to their extreme values still allowed, ratios of cosmic neutrino fluxes can differ by up to 20%; such large discrepancies could imply negligibly small CP-violation. We also study a non radiative neutrino decay model and find that the neutrino fluxes can differ by a factor of up to 3 within this model and that an accuracy of 10% on the neutrino fluxes is sufficient to set interestin limits on delta.Comment: 8 pages, 2 figures, 5 table

Neutrino Mixing and Leptogenesis in μ−τ\mu-\tau Symmetry

We study the consequences of the $Z_2$-symmetry behind the $\mu$--$\tau$ universality in neutrino mass matrix. We then implement this symmetry in the type-I seesaw mechanism and show how it can accommodate all sorts of lepton mass hierarchies and generate enough lepton asymmetry to interpret the observed baryon asymmetry in the universe. We also show how a specific form of a high-scale perturbation is kept when translated via the seesaw into the low scale domain, where it can accommodate the neutrino mixing data. We finally present a realization of the high scale perturbed texture through addition of matter and extra exact symmetries.Comment: 29 pages, 1 figure, 3 tables. Complete re-analysis. Version to appear in PR

Patterns in the Fermion Mixing Matrix, a bottom-up approach

We first obtain the most general and compact parametrization of the unitary transformation diagonalizing any 3 by 3 hermitian matrix H, as a function of its elements and eigenvalues. We then study a special class of fermion mass matrices, defined by the requirement that all of the diagonalizing unitary matrices (in the up, down, charged lepton and neutrino sectors) contain at least one mixing angle much smaller than the other two. Our new parametrization allows us to quickly extract information on the patterns and predictions emerging from this scheme. In particular we find that the phase difference between two elements of the two mass matrices (of the sector in question) controls the generic size of one of the observable fermion mixing angles: i.e. just fixing that particular phase difference will "predict" the generic value of one of the mixing angles, irrespective of the value of anything else.Comment: 29 pages, 3 figures, references added, to appear in PR

A ‘3P’ soft power model: an agile approach to diplomatic strategy

Soft power is the ability to shape the preferences of others through appeal and attraction rather than coerce using hard power. Today, most countries are embracing the notion of soft power. Managing soft power resources at the disposal of governments and deploying them effectively is critical for an agile government to build an attractive country image, and thereby enhancing their competitiveness in today’s dynamic and competitive global landscape. This includes but not limited to promoting their country’s products and services globally, attract foreign investors, and promoting international tourism. In this study, we develop and validate a novel ‘3P’ soft power model, using the perceptions about a country’s ‘products’, ‘places’, and ‘people’. Using 167 usable responses obtained from a structured country-wide survey in the UAE, the 3P model developed from the literature was tested for reliability, validity, and model-fitness. While Cronbach’s alpha values confirmed the reliability of first-order constructs (products, place and people), the second-order confirmatory factor analysis (CFA) established the convergent and discriminant validity of the constructs, and operationalization of ‘3P Soft Power’ as a higher (second)-order model. The results have implications for governments and researchers in promoting soft power by leveraging its products, places and people. A robust higher-order factor model for soft power using 3P’s has not been developed previously and constitutes the novelty of this study

Pulmonary Embolism Revealing Idiopathic Membranous Glomerulonephritis

We describe a case of a 55-year-old man who presented with pulmonary embolism and who was found to have nephrotic syndrome due to idiopathic membranous nephropathy. There are no other signs of nephrotic syndrome such as edema

Epidémiologie Du Néphroblastome dans le Centre Hospitalo-Universitaire de Tizi Ouzou

Objectif : est de donner les éléments fondamentaux de l’épidémiologie descriptiveconcernant le néphroblastome.Matériel et méthode : Nous avons réalisé une étude rétrospective à visée descriptive sur une période de 4 ans, et nous avons récences 13 cas.Résultats : On avait répertorié 15 cas de néphroblastome. L’âge médian était de 4 ans. Le Sexe ratio était de 1,7. Le délai au diagnostic s’étendait entre 3 à 20 jours.Le motif de découverte le plus fréquent était une masse abdominale, suivi de la douleur abdominale dans 18% des cas. La plupart des cas n’étaient pas métastatiques au diagnostic. Les tumeurs de risque intermédiaire étaient les seules retrouvés dans notre étude et aucun cas de tumeur de haut risque et de bas risque. La majorité des cas étaient au stade III au diagnostic et aucun stade I n’a été répertorié. Conclusion : Le néphroblastome est la tumeur rénale maligne la plus fréquente, le mode de découverte reste le même quel que soit le contexte, il reste néanmoins certaine divergence avec les données de la littérature, tel que les stade diagnostics et les types histologique

Modeling and Optimization of Phosphate Recovery from Industrial Wastewater and Precipitation of Solid Fertilizer using Experimental Design Methodology

In this work, the experimental design methodology is applied to optimize phosphate salts precipitation as struvite and others applied in soil fertilization from treated industrial wastewater stream. This is a process to maximize phosphate recovery percentage from inlet wastewater stream containing interfering foreign ions. Therefore, these optimized conditions could be used as input data for engineering design-software for successive equipment required in wastewater treatment plant. A four factors Box–Behnken experimental design was used to model and optimize the operating parameters. The optimum operating conditions were quite efficient in trapping 86.10 % recovered phosphates in industrial stream, and 92.6 % in synthetic solution at pH of 10.89, time of reaction of 34.76 min, temperature of 25.23 °C and R of 2.25 with an insignificance effect for molar ratio (R) between Mg and PO4 ions. If these optimal parameters were shifted, the reached recovery percentage would decrease with the precipitated struvite. The precipitated salts were subjected to characterization through different chemical techniques confirming the presence of struvite with schertelite as a mixed slow release fertilizer

Uplifted supersymmetric Higgs region

We show that the parameter space of the Minimal Supersymmetric Standard Model includes a region where the down-type fermion masses are generated by the loop-induced couplings to the up-type Higgs doublet. In this region the down-type Higgs doublet does not acquire a vacuum expectation value at tree level, and has sizable couplings in the superpotential to the tau leptons and bottom quarks. Besides a light standard-like Higgs boson, the Higgs spectrum includes the nearly degenerate states of a heavy spin-0 doublet which can be produced through their couplings to the $b$ quark and decay predominantly into \tau^+\tau^- or \tau\nu.Comment: 14 pages; Signs in Eqns. (3.1) and (4.2) corrected, appendix include