Cooling Ability-based Integrated Quality of Laser-drilled Holes

Research aimed at improving the end-product quality in meeting the functional needs isimperative to sustain product development. Aerospace manufacturers are increasingly usingpercussion laser drilling for producing cooling holes in turbine components made of nickel basesuperalloys. Laser drilling of superalloys has been initiated at the Defence Metallurgical ResearchLaboratory, Hyderabad in the last decade keeping in view its uses in Kaveri Gas Turbine Engineprogramme. Considerable.work has been carried out in this direction. Laser-drilled hole's qualityissue has been addressed in the past considering separately the shape, precision, and functionalcharacteristics of the laser-drilled holes. In the present investigation, a newer approach for defininghole quality has been reported which takes into account the above hole characteristics forcomputing cooling ability of the holes. This approach indicates that it is feasible to producebetter integrated quality holes through laser drilling

Evaluation of Phyto Chemical Biochemical and In Vitro Antioxidant Potential of Angelica Glauca Grown at High Altitude Areas of Western Himalayas

Angelica glauca Edgew is an important medicinal and aromatic herb (family Apiaceae). The roots of A. glauca commonly used as spices by local peoples. In the present study, the phytochemical constituents, biochemical parameters and, in-vitro antioxidant activity of A. glauca roots collected from the Himalayan region have been studied. For preliminary phytochemical analysis, the hydroalcoholic and aqueous root extract of Angelica glauca were screened for the presence of carbohydrates, protein, alkaloids, glycosides, sterols, triterpenes, saponin, tannins, phenols, flavonoids, and coumarin. The biochemical parameter and in-vitro antioxidant potential of Angelica glauca were analysed by using standard methods. Phytochemical analysis of extract showed major classes of phytochemicals constituents such as carbohydrates, protein, alkaloids, glycosides, sterols, triterpenes, saponin, tannins, phenols, flavonoids, and coumarin. The results from the current study demonstrated that A.glauca roots contained carbohydrate (21±0.72 %), crude protein (12.7±0.31 %), total ash (3.86±0.034 %), dietary fiber (18.9±0.14 %), total fat (4.5±0.38 %) and ascorbic acid (68.5±0.19mg/100g). The hydroalcoholic extract showed the highest quantity of total phenol, total flavonoids, and total tannin content compared to aqueous extract. The hydroalcoholic extract exhibited high DPPH radical scavenging activity (IC50=68.1±0.34 µg/ml). The result showed that A.glauca roots have high nutritional and antioxidant potential. Hence the plant can be used as a nutraceutical and natural antioxidant

Genome-wide association study for acute otitis media in children identifies FNDC1 as disease contributing gene

Acute otitis media (AOM) is among the most common pediatric diseases, and the most frequent reason for antibiotic treatment in children. Risk of AOM is dependent on environmental and host factors, as well as a significant genetic component. We identify genome-wide significance at a locus on 6q25.3 (rs2932989, Pmeta=2.15 × 10-09), and show that the associated variants are correlated with the methylation status of the FNDC1 gene (cg05678571, P=1.43 × 10-06), and further show it is an eQTL for FNDC1 (P=9.3 × 10-05). The mouse homologue, Fndc1, is expressed in middle ear tissue and its expression is upregulated upon lipopolysaccharide treatment. In this first GWAS of AOM and the largest OM genetic study to date, we identify the first genome-wide significant locus associated with AOM

Demonstration of the temporal matter-wave Talbot effect for trapped matter waves

We demonstrate the temporal Talbot effect for trapped matter waves using ultracold atoms in an optical lattice. We investigate the phase evolution of an array of essentially non-interacting matter waves and observe matter-wave collapse and revival in the form of a Talbot interference pattern. By using long expansion times, we image momentum space with sub-recoil resolution, allowing us to observe fractional Talbot fringes up to 10th order.Comment: 17 pages, 7 figure

Kaon Production and Kaon to Pion Ratio in Au+Au Collisions at \snn=130 GeV

Mid-rapidity transverse mass spectra and multiplicity densities of charged and neutral kaons are reported for Au+Au collisions at \snn=130 GeV at RHIC. The spectra are exponential in transverse mass, with an inverse slope of about 280 MeV in central collisions. The multiplicity densities for these particles scale with the negative hadron pseudo-rapidity density. The charged kaon to pion ratios are $K^+/\pi^- = 0.161 \pm 0.002 {\rm (stat)} \pm 0.024 {\rm (syst)}$ and $K^-/\pi^- = 0.146 \pm 0.002 {\rm (stat)} \pm 0.022 {\rm (syst)}$ for the most central collisions. The $K^+/\pi^-$ ratio is lower than the same ratio observed at the SPS while the $K^-/\pi^-$ is higher than the SPS result. Both ratios are enhanced by about 50% relative to p+p and $\bar{\rm p}$+p collision data at similar energies.Comment: 6 pages, 3 figures, 1 tabl

Azimuthal anisotropy at RHIC: the first and fourth harmonics

We report the first observations of the first harmonic (directed flow, v_1), and the fourth harmonic (v_4), in the azimuthal distribution of particles with respect to the reaction plane in Au+Au collisions at the Relativistic Heavy Ion Collider (RHIC). Both measurements were done taking advantage of the large elliptic flow (v_2) generated at RHIC. From the correlation of v_2 with v_1 it is determined that v_2 is positive, or {\it in-plane}. The integrated v_4 is about a factor of 10 smaller than v_2. For the sixth (v_6) and eighth (v_8) harmonics upper limits on the magnitudes are reported.Comment: 6 pages with 3 figures, as accepted for Phys. Rev. Letters The data tables are at http://www.star.bnl.gov/central/publications/pubDetail.php?id=3

Measurement of the Bottom-Strange Meson Mixing Phase in the Full CDF Data Set

We report a measurement of the bottom-strange meson mixing phase \beta_s using the time evolution of B0_s -> J/\psi (->\mu+\mu-) \phi (-> K+ K-) decays in which the quark-flavor content of the bottom-strange meson is identified at production. This measurement uses the full data set of proton-antiproton collisions at sqrt(s)= 1.96 TeV collected by the Collider Detector experiment at the Fermilab Tevatron, corresponding to 9.6 fb-1 of integrated luminosity. We report confidence regions in the two-dimensional space of \beta_s and the B0_s decay-width difference \Delta\Gamma_s, and measure \beta_s in [-\pi/2, -1.51] U [-0.06, 0.30] U [1.26, \pi/2] at the 68% confidence level, in agreement with the standard model expectation. Assuming the standard model value of \beta_s, we also determine \Delta\Gamma_s = 0.068 +- 0.026 (stat) +- 0.009 (syst) ps-1 and the mean B0_s lifetime, \tau_s = 1.528 +- 0.019 (stat) +- 0.009 (syst) ps, which are consistent and competitive with determinations by other experiments.Comment: 8 pages, 2 figures, Phys. Rev. Lett 109, 171802 (2012