944 research outputs found

    Experimental Study on Strength Properties of Triple Blended Self-Compacting Concrete

    Get PDF
    Self-compacting concrete (SCC) is a flowing concrete mixture that can self-consolidate under its own weight, and it is one of the most significant advancements in concrete technology in the recent decade. SCC's very fluid character makes it ideal for use in challenging situations and in sections with crowded reinforcing. SCC, which was initially created in the late 1980s, has since expanded around the world, with an ever-growing variety of applications. Because of its unique features, SCC has the potential to significantly improve the quality of concrete buildings while also opening up new areas for concrete use. The addition of treated and untreated industrial byproducts, raw materials, and home wastes to SCC is becoming increasingly popular as a way to make it more durable and cost effective. This not only allows waste materials to be reused, but it also results in a eco-friendly environment. The Strength Characteristics of Self-Compacting Concrete were determined by an experimental investigation (SCC). The goal of this research is to see how Fly Ash (FA), Ground Granulated Blast Furnace Slag (GGBS), and Silica Fume (SF) can be used as cement substitutes and what influence they have on the fresh and hardened qualities of concrete. The investigation involves the notion of using a triple blend of Fly ash, GGBS, and Silica Fume to produce better concrete. This triple blend takes use of the favorable properties of Pozzolanic materials

    Ekpyrosis and inflationary dynamics in heavy ion collisions: the role of quantum fluctuations

    Full text link
    We summarize recent significant progress in the development of a first-principles formalism to describe the formation and evolution of matter in very high energy heavy ion collisions. The key role of quantum fluctuations both before and after a collision is emphasized. Systematic computations are now feasible to address early time dynamics essential to quantifying properties of strongly interacting quark-gluon matter.Comment: Talk by R.V. at Quark Matter 2011, Annecy, France, May 23-28, 2011. LaTex, 4 pages; v2, final version to appear in J. Phys.

    Quantification of yield gaps in rain-fed rice, wheat, cotton and mustard in India

    Get PDF
    Rainfed farming / Crop yield / Simulation / Rice / Wheat / Cotton / Mustard / India

    The Emerging QCD Frontier: The Electron Ion Collider

    Full text link
    The self-interactions of gluons determine all the unique features of QCD and lead to a dominant abundance of gluons inside matter already at moderate xx. Despite their dominant role, the properties of gluons remain largely unexplored. Tantalizing hints of saturated gluon densities have been found in ee+p collisions at HERA, and in d+Au and Au+Au collisions at RHIC. Saturation physics will have a profound influence on heavy-ion collisions at the LHC. But unveiling the collective behavior of dense assemblies of gluons under conditions where their self-interactions dominate will require an Electron-Ion Collider (EIC): a new facility with capabilities well beyond those In this paper I outline the compelling physics case for ee+A collisions at an EIC and discuss briefly the status of machine design concepts. of any existing accelerator.Comment: 11 pages, 9 figures, prepared for 20th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions: Quark Matter 2008 (QM2008), Jaipur, India, 4-10 Feb. 200

    Pair production by boost-invariant fields in comoving coordinates

    Full text link
    We derive the pair-production probability in a constant electric field in Rindler coordinates in a quasi-classical approximation. Our result is different from the pair-production probability in an inertial frame (Schwinger formula). In particular, it exhibits non-trivial dependence on rapidity and deviation from Gaussian behavior at small transverse momenta. Our results can be important for analysis of particle production in heavy-ion collisions.Comment: 12 pages, 2 figures. Discussion added and typos fixe

    From Glasma to Quark Gluon Plasma in heavy ion collisions

    Full text link
    When two sheets of Color Glass Condensate collide in a high energy heavy ion collision, they form matter with very high energy densities called the Glasma. We describe how this matter is formed, its remarkable properties and its relevance for understanding thermalization of the Quark Gluon Plasma in heavy ion collisions. Long range rapidity correlations contained in the near side ridge measured in heavy ion collisions may allow one to directly infer the properties of the Glasma.Comment: Plenary Topical Overview Talk, Quark Matter 2008; 10 pages 8 figure

    Effect of Temperature and Period of Storage on Breaking Dormancy in Gladiolus (Gladiolus grandiflorus Hort.) Corms

    Get PDF
    An experiment was conducted in 2010-2011 at Indian Institute of Horticultural Research, Bengaluru, on three gladiolus cultivars viz., 'Arka Amar', 'Darshan' and 'Kum Kum' to study effects of storage temperature (4°C and room temperature 27±2°C) and length of storage (50, 70 and 90 days) on dormancy of corms. Cv. 'Kum Kum' registered minimum number of days for sprouting (42.71 days), spike emergence (116 days) and days to opening of first floret (128 days). Corms stored at 4°C resulted in lowest number of days for-sprouting (45.24 days), days to spike emergence (114.63 days) and days to opening of first floret (126.60 days) and resulted in highest sprouting percentage (58.7%). Interaction effects revealed that cv. 'Kum Kum' stored at 4°C for 90 days after harvest took minimum number of days to sprouting (25.07 days), days to spike emergence (90.38 days) and days to opening of first floret (102.38 days) resulting in 100% sprouting

    Genetic Variability for Quantitative Traits in China Aster [Callistephus chinensis (L.) Nees]

    Get PDF
    A field study was conducted to estimate genetic variability, heritability and genetic advance in 20 genotypes of China aster for 15 traits during the year 2012-13 in Randomized Complete Block Design, with three replications. Results revealed that the magnitude of phenotypic co-efficient of variation (PCV) was higher than genotypic co-efficient of variation (GCV) for all the traits studied. Narrow differences between GCV and PCV were recorded in all the characters except flowering duration, vase-life and shelf-life, indicating little environmental influence on expression of these characters. High (>20%) GCV and PCV were recorded for plant height, number of branches and leaves per plant, flower diameter, number of ray and disc florets/flower head, stalk length, and, number and weight of flowers/plant. Heritability estimates ranged from 28.30% (flowering duration) to 99.54% (flower diameter). High heritability (<60%) was observed for all the traits except flowering duration. High heritability, coupled with high genetic advance as per cent mean, was recorded for flower diameter, stalk-length, number of branches/plant, weight of flowers/plant, days to first flower opening, days to 50 per cent flowering, plant height, number of leaves/plant, number of ray and disc florets/flower head, number of flowers/plant, indicating a possible role of additive gene action. Thus, these traits can be improved through selection and breeding
    corecore