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

Radiative stability of neutrino-mass textures

Neutrino-mass textures proposed at high-scales are known to be unstable against radiative corrections especially for nearly degenerate eigen values. Within the renormalization group constraints we find a mechanism in a class of gauge theories which guarantees reproduction of any high-scale texture at low energies with radiative stability. We also show how the mechanism explains solar and atmospheric neutrino anomalies through the bimaximal texture at high scale.Comment: 4 pages REVTEX, 1 Postscript fi

A comparative study of functional outcome of short proximal femoral nail with long proximal femoral nail in proximal femoral fractures

Background: Trochanteric femoral fractures are often seen in patients aged they can be caused by high-energy or low-energy trauma or may be pathological. Particularly in the elderly, hip fractures are a major cause of increased mortality and morbidity. Because of the decreased physical capacity, concomitant systemic diseases, and increased vulnerability to environmental dangers, even low-energy trauma can cause unstable femoral trochanteric fractures in this age group. Compare the functional outcome of the short proximal femoral nail with a long proximal femoral nail in proximal femoral fractures.Methods: This retrospective study was conducted in the Department of Orthopaedics, Karpaga Vinayaga Institute of Medical Sciences and Research Centre, Chengalpattu Dist., Tamil Nadu, India. (KIMS &amp; RC). Palmer/Parker score is obtained for the functional outcome of the short proximal femoral nail with a long proximal femoral nail in proximal femoral fractures.Results: It is concluded from our study that proximal femoral nailing is an attractive and suitable implant for Proximal Femoral Fractures and its use in unstable intertrochanteric fractures is very encouraging.  Conclusions: The database of our retrospective study regarding age &amp; sex incidence, clinicopathological features and therapeutic outcome was comparable to other studies in various literatures

Seesaw Neutrino Masses with Large Mixings from Dimensional Deconstruction

We demonstrate a dynamical origin for the dimension-five seesaw operator in dimensional deconstruction models. Light neutrino masses arise from the seesaw scale which corresponds to the inverse lattice spacing. It is shown that the deconstructing limit naturally prefers maximal leptonic mixing. Higher-order corrections which are allowed by gauge invariance can transform the bi-maximal into a bi-large mixing. These terms may appear to be non-renormalizable at scales smaller than the deconstruction scale.Comment: Revised version published in PR

Effect of Localised Pressure Depression and Rain on Aerodynamic Characteristics of MALE UAV

This paper presents the effect of the local low-pressure region in the atmosphere and rain on aerodynamiccharacteristics of medium altitude long endurance unmanned aerial vehicle (MALE-UAV) configuration duringcruise/loiter. Computations are performed using CFD++, a commercial CFD software suite. A large low-pressuredepression past the MALE UAV (symmetrically and asymmetrically) with pressure 10 – 15 % lower than the freestream pressure and a widespread rainfall type with a rainfall rate of 1195 mm/hr., are considered for CFD simulation.A large low pressure that spans the whole MALE-UAV results in a decrement in both lift and drag, but does not affect the yawing and rolling moments significantly. However, a low-pressure region that engulfs only one-half of MALE UAV causes sudden/abrupt changes in rolling and yawing moments. The effect of rain causes a significant decrease in a lift at higher alpha, accompanied by a decrease in stall angle of 2 degrees, and a significant increase in drag. From the study, a Standard Operating Procedure (SOP) was adopted to fly UAVs in adverse weather effects,such that the aircraft can be operated with a velocity higher than 1.3Vstall and at a power setting not less than 75% of max power capacity

A study on deep neck space infections.

Deep neck space infections are life threatening infections of the head and neck region .Wide spread use of antibiotics has lowered the life threatening infections and also altered their clinical presentation. Rapid spread of infection from one space to another space results in increased incidence of complication. In the present study of 130 cases of deep neck space infections,the diagnosis was established based on detailed clinical history, accurate clinical examination, laboratory investigations and radiological examination . In 130 cases of deep neck space infections, 69% of patients were males, 31% of patients were females. Infection were common in males . Among the deep neck space infections the most common was peritonsillar abscess (33%). Remaining infections were Ludwig’s angina (25%), retropharyngeal abscess (23%), parapharyngeal abscess (9%) , submandibular abscess (3%) , parotid abscess (3%) , buccal abscess (3%), anterior visceral space abscess (3%) and deep neck space infections with acute necrotizing fasciitis (1%) . All the cases presented with fever and most of the cases with sore throat and dysphagia. Other clinical features were odynophagia, trismus, neck pain, neck swelling, change in voice, cheek swelling and remaining features based on the spatial compartments involved. The most common etiology for deep neck space infections was odontogenic infection followed by chronic pharyngitis. Based on the investigations most of the patients in this study were treated by incision and drainage followed by antibiotics based on culture and sensitivity of the aspirate. The most commonest organism was staphylococcus aureus followed by streptococcus pyogenes and pneumoniae. Most of the patients in this study were treated by combination of antibiotics like cefotaxime, metronidazole and garamycin followed by dental opinion . The age group most commonly involved were between 31 yrs – 40 yrs. Conservative treatment was done by culture directed antibiotics .Surgical treatment involved incision and drainage, If there are signs of impending airway obstrucion tracheostomy was performed