797 research outputs found

    Study of 1D stranged-charm meson family using HQET

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    Recently LHCb predicted spin 1 and spin 3 states D* s1(2860) and D* s3(2860) which are studied through their strong decays, and are assigned to fit the 13D1and 13D3 states in the charm spectroscopy. In this paper,using the heavy quark effective theory, we state that assigning D*s1(2860) as the mixing of 13D1 - 23S1 states, is rather a better justification to its observed experimental values than a pure state. We study its decay modes variation with hadronic coupling constant gxh and the mixing angle . We appoint spin 3 state D* s3(2860) as the missing 1D 3- JP state, and also study its decay channel behavior with coupling constant gyh. To appreciate the above results, we check the variation of decay modes for their spin partners states i.e. 1D2 and 1D'2 with their masses and strong coupling constant i.e. gxh and gyh. Our calculation using HQET approach give mixing angle between the 13D1 - 23S1 state for D* s1(2860) to lie in the range (-1.6 radians < theta < -1.2 radians). Our calculation for coupling constant values gives gxh to lie between value 0:17 < gxh < 0:20 and gyh to be 0.40. We expect from experiments to observe this mixing angle to verify our results.Comment: 11 pages, 9 figure and 5 Tables, EPJC 2015 communicate

    Heavy-light charm mesons spectroscopy and decay widths

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    We present the mass formula for heavy-light charm meson for one loop, using heavy quark effective theory. Formulating an effective Lagrangian, the masses of the ground state heavy mesons have been studied in the heavy quark limit including leading corrections from finite heavy quark masses and nonzero light quark masses using a constrained fit for the eight equation having eleven parameters including three coupling constants g, h and g'. Masses determined from this approach is fitted to the experimentally known decay widths to estimate the strong coupling constants, showing a better match with available theoretical and experimental dataComment: 16 pages and 12 figures. arXiv admin note: text overlap with arXiv:hep-ph/0503134 by other author

    Stability of a Self-Gravitating Rotating Stratified Plasma

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    Development of value added Pasta with incorporation of malted finger millet flour

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    This study considers the replacement of Semolina with malted finger millet flour containing wide range of nutrients in enrichment of pasta. The changes in nutritional constituents and bioactive compounds (TPC, Radical Scavenging Activity) of pasta were examined by adding malted finger millet flour to the pasta formulations at the level of 0 (T0), 10 (T1), 20 (T2), 30 (T3), 40 (T4) and 50 (T5) per cent flour replacement. The results indicated that T4 sample of finger millet flour added pasta contained more protein content i.e. 12.65 g compared to that of control pasta (T0) i.e. 7 g. Same way the calorie content of value added pasta was higher i.e. 409.94 Kcal/100 g as compared to control pasta (T0) i.e. 324.40 Kcal/100 g. Calcium content of value added pasta was comparatively very high i.e. 170.4 mg/100 g as compared to 15.3 mg/100 g of control. As far TPC content &amp; DPPH % were considered, T4 sample of pasta have higher amount of both i.e. 220 mg Gallic acid eq. &amp; 53.38 % as compared to control pasta (T0) i.e. 220 mg Gallic acid eq. &amp; 17.59 % respectively. Pasta and related products are the most popular are the most popular food worldwide. Usually pasta and other extruded products are high in starch but low in dietary fiber, minerals and vitamins. The present study clearly indicates that the use of malted finger millet flour will improve nutritional quality of pasta in terms of antioxidant activity

    Prevalence of Vitamin A deficiency among school going children of Jasra block of Allahabad, India

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    The present study was conducted to find out the prevalence of vitamin A deficiency(VAD) among school going children of district Allahabad in year 2015 to assess the nutritional status of selected school going children (aged 6-12 years). The six months study was based on school going children in four selected village in Jasra block of Allahabad district.A structured Performa was used to collect the information. Out of the 105 children examined, 2 (1.90%) had clinical signs of night blindness. The overall prevalence of VAD was found to be 10.47%. Most of them exhibited dull and lusterless appearance of conjunctiva, non-had bitot’s spot, any corneal xerosis, corneal scare and keratomalacia. The prevalence of VAD was higher in girls rather than in boys. To overcome this problem of VAD persisting in community, nutrition education regarding regular intake of plant food rich in carotene such as green leafy vegetables, yellow fruits, carrots and animal foods containing retinol like fish liver oil, fortified food like vana- spati, margarine should be strengthened

    Development of Novel Passive Control Techniques for More Uniform Temperature at Combustor Exit and Hybrid Les/Rans Modeling

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    Gas turbines have become an important, widespread, and reliable device in the field of power generation. For any gas turbine system, the combustor is an integral part responsible for the combustion of the fuel. A number of studies have shown that the flow field exiting a combustor is highly non-uniform in pressure, velocity and, most importantly, temperature. Hot streaks amongst other non-uniformities cause varying thermal stresses on turbine blades and put pressure on the blade materials. In particular, these non-uniformities can have detrimental effects on the performance of the engine and cause a reduction in the expected life of critical components such as the turbine vanes. Due to the importance and severity of the problem, a large portion of the total combustor development effort is devoted to achieving better temperature uniformity. The present work is another attempt to develop novel passive control techniques to enhance mixing in a facility simulating the dilution zone of a typical gas turbine combustor and produce more uniform temperature at the combustor exit. Extensive experimentation was conducted to compare the proposed dilution techniques - staggered dilution holes, staggered dilution holes with streamlined body and staggered dilution holes with guide vanes at various orientations (0°, 30°, 60° and 90°). A weighted parameter was defined called `uniformity factor (\u27χ^\u27 ) to compare how close the mixture fraction is to the equilibrium value. For the majority of the flow conditions tested, the 30° guide vanes gave the most uniform temperature flow with just about 2% higher pressure loss as compared to the staggered dilution holes geometry. The fact that the use of 30° guide vanes can provide the turbine blade with 15% more uniform temperature flow than the staggered dilution holes design with merely 2% more pressure drop, has a very important implementation in order to reduce the damage of the turbine blades due to non-uniform temperature flow and extend its life-span. This would result in an overall reduction in the maintenance cost of the gas turbine systems which is quite significant. Furthermore, it was found that the introduction of the streamlined body not only improved the mixing in some cases but also helped decrease the pressure drop from inlet to exit of the experimental set-up. This is expected to increase the overall system efficiency and decrease the operating cost of a gas turbine system. Additionally, numerical modeling was used for various parametric studies to explore the effect of jet-to-mainstream momentum flux ratio on the exit temperature uniformity, variation of the cooling rate within the dilution zone, exergy analysis, etc. The other significant part of this work comprised of development of an Algebraic Stress Model (ASM) in order to estimate the turbulence via Reynolds stresses prediction. The ASM model developed is validated for a simple two-dimensional turbulent flow over a flat plate and a complex three dimensional flow around Ahmed body. The developed model is capable of predicting Reynolds stresses for a variety of flow regimes. Based on these validation it can be concluded that adopting a hybrid approach which combines the advantages of the ASM model with other turbulence models can be sought after for a more in-depth analysis of the flow structures and turbulent quantities both near-wall and away from the boundary for any fluid flow problem. The accurate prediction of the turbulent quantities plays a significant role in not just the fluid motion/transfer phenomenon rather it governs the heat exchange process as well especially in regions close to the wall

    QUALITY ASSESSMENT AND NUTRIENT COMPOSITION OF WEANING FOOD FORMULATED FROM STAPLE FOODS

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    Prevalence of malnutrition in children in India is high due to poorcomplementary feeding practices. Every third child in India is suffering from malnutrition. Anattempt was made to formulate low cost, nutritive complementary food using soya bean, wheat,apple, sweet potato and carrot. The blend prepared was evaluated for their physical andchemical analysis. According to the sensory evaluation data, WF3 was scored higher onaverage by the panelist in terms of the taste, consistency, color and overall acceptability.Standard methods were used for the chemical analysis, the ash and moisture content of theprepared blend was 6.519g and 0.33%, protein, calcium, carbohydrate, β carotene, iron, fat,fiber and vit C was 10.67g, 6.48mg, 46.25g, 687.06mg, 5.281mg, 2.329g, 3.88mg and 6.48mgrespectively which was able to meet the recommended dietary allowances of infants. The blendwas found rich in protein, calcium, energy and β carotene. Therefore result suggests that theweaning food is a potential tool for eliminating the protein energy malnutrition among thechildren which provides sufficient energy with good proteins, calcium and β carotene inadequate levels through a cost effective way than conventional staple cereals flour mixture

    Boston keratoprosthesis type 1 - indication, complication and visual outcomes

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    Background: Diseases affecting the cornea are a major cause of blindness all over the world, second only to cataract in overall importance. In India, there are approximately 6.8 million people who have corneal blindness with vision less than 6/60 in at least one eye, and of these, about 1 million have bilateral corneal blindness.Methods: The study was conducted in upgraded department of ophthalmology, L.L.R.M. Medical College, Meerut, India from January 2014 to June 2015. It was prospective interventional study. Included those patients who have Failed corneal graft with poor prognosis for further grafting, multiple corneal graft failure, having nearly total corneal neovascularization, vision less than 6/60 with associated other complications in better eye and no vision in opposite eye and Healed Chemical burn and those patients who has end stage glaucoma or RD (retinal detachment), defective perceptions and projection of light and not willing for the procedure.Results: A total of 20 patients were enrolled for the study which were followed up and assessed over 12 months. It was observed that maximum number of patients were in the age group of 41-60 years (45%) and in the >60 years group are minimum (20%). Among these 14 cases (70%) were male and 6 cases (30%) were female.Conclusions: The Boston type 1 keratoprosthesis provides visual recovery for eyes with multiple PK failures or with poor prognosis for primary PK, showing excellent retention rates. Most of the cases had a significant improvement in vision after Boston type I KPro implantation
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