An optimal procedure for magnet sorting

A new magnet sorting method for accelerators is developed. It is based on the linearized analysis of the effects of errors on accelerators. It is implementable in two steps. The first step is completely analytical in character while the second step involves the comparison of computed values with the measured error values. The whole process is repeated at most n'' times, where n'' is the number of magnets to be chosen from at a time. Simulations of the method, using Mathematica[reg sign], have been implemented for sorting the APS injector synchrotron dipoles and quadrupoles with excellent results

IRREVERSIBILITY ANALYSIS IN Al2O3-WATER NANOFLUID FLOW WITH VARIABLE PROPERTY

The present numerical work deals with the optimization of the micro-channel heat sink using irreversibility analysis. The nanofluid of Al2O3-water with the different nanoparticles concentration and the temperature-dependent property is chosen as a coolant. The flow is considered as fully developed, steady, and laminar in the constant cross-section of circular channels. Navier-Stokes and energy equations are solved for a single-phase flow with total mass flow rate and heat flow rate as constant. The objective functions related to the frictional and heat transfer irreversibilities are framed to assess the performance of the micro-channel heat sink. The optimum channel diameter corresponding to the optimum number of channels is determined at the lowest total irreversibility for both constant property solution and variable property solution. Designed optimum diameter is observed maximum for 2.5% Al2O3-water nanofluid with μ(T) variation followed by 1% Al2O3-water nanofluid with μ(T) variation, 2.5% Al2O3-water nanofluid with constant property solution, and 1% Al2O3-water nanofluid with constant property solution

Molecular cloning and sequence analysis of cDNAs encoding the transformation-sensitive actin cross-linking protein transgelin

The central role of actin in crucial cellular activities including muscle contraction, locomotion, cytokinesis, maintenance of cell shape and movement of cell surface receptors has been widely studied. Controlled modulation of the actin cytoskeleton is mediated by an array of molecularly diverse actin associated proteins that variously regulate its polymerisation state, geometric organisation and interactions with other ligands. I have cloned cDNAs encoding the transformation-sensitive actin gelating higher molecular weight isoform of a 21kDa polypeptide doublet (protein C4) found uniformly distributed along stress fibres in normal mesenchymal cells. This isoform, designated transgelin, was found to be the product of a single gene, conserved at the nucleotide level in the H sapiens, R norvegicus, D melanogaster, and Aplysia genomes with a single strong band as far back as the fission yeast S pombe. Northern blotting identified a single mRNA that was abundantly expressed in smooth muscle tissues and cultured fibroblasts but was absent in skeletal muscle, thymus and liver tissues. SV40-transformation of 3T3 fibroblasts was found to down-regulate transgelin expression at the level of transcription or mRNA stability. The protein encoded by these cDNAs was found to be significantly related to a number of other proteins (C41, M Smith unpublished; NP25, unpublished EMBL M84725; chick calponin α and β, Takahashi & Nadal-Ginard 1991; and Drosophila mp20, Ayme-Southgate et al 1989) suggesting that they may be classified as members of a new transgelin multigene family

Population densities and biomass of aboveground arthropods under various grazing and environmental stress treatments on the Pawnee site

December 1972.On cover: Grassland Biome, Ecosystem analysis studies, U.S. International Biological Program.Includes bibliographical references

Population densities and biomass of aboveground arthropods subjected to environmental stress treatments on the Pawnee site, 1973

October 1974.On cover: Grassland Biome, Ecosystem analysis studies, U.S. International Biological Program.Includes bibliographical references

Design and development of the front wheel hub for All-Terrain Vehicle (ATV) / Himanshu Verma...[et al.]

An all-terrain vehicle (ATV) is a single seat, open cockpit, and open wheel off-road vehicle in which the engine is located behind the driver. The present paper discusses the important aspects of designing and development of the front wheel hub of ATV. This study discusses the design of the front wheel hub while considering that it should be of light weight and high strength. This paper discusses the material selection for the hub from the two different types of material. This study includes the improvement in the design of the hub with the help of various analyses of the hub. The hub is analyzed in the various loading conditions to obtain the appropriate factor of safety with the help of a static structural module of ANSYS software

Numerical investigation on performance and emission characteristics of a diesel engine fired with methanol blended diesel fuel / Gurkamal Nain Singh...[et al.]

The effects of methanol and oleic acid blended diesel fuel on the performance and emissions of the diesel engine are evaluated numerically by commercial software Diesel-RK to simulate a single cylinder, naturally aspirated, direct injection, four-stroke diesel engine. The present study also resolves the problem of the immiscibility of methanol in diesel fuel, as to avoid immiscible nature an optimum percentage of oleic acid and n-butanol is added to make blends stable. The methanol blended diesel fuels are 7%, 12%, and 17% methanol in volume basis (D85M7NB1O7, D75M12NB1O12, and D65M17NB1O17). A drastic reduction in NOx emission is observed due to low combustion temperature however the PM emissions increases which can be controlled by using exhaust after-treatment techniques. The results indicate that: the brake specific fuel consumption increases and brake thermal efficiency decreases with an increase of methanol, oleic acid and n-butanol contents in the blended fuel whereas maximum heat release rate increases and exhaust temperature decreases

Investigating Optimum Conditions for Developing Pozzolanic Ashes from Organic Wastes as Cement Replacing Materials

This research was performed to investigate the optimum conditions for developing pozzolanic ashes from organic wastes to be used as cement replacement materials. The organic wastes explored in the research are rice husk ash (RHA), wheat straw ash (WSA), and cow dung (CDA). When the organic waste is turned into ash, it develops a pozzolanic character due to the presence of silica. However, the presence of reactive silica and its pozzolanic reactivity depends on the calcination temperature, duration, and grinding. In this research, the organic wastes were calcined at three different calcination temperatures (300 °C, 400 °C, and 800 °C) for 2, 4, 6, and 8 h duration. The obtained ashes were ground for 30 min and replaced by 20% with cement. The samples containing ashes were tested for compressive strength, X-ray diffractometry (XRD), weight loss, and strength activity index (SAI). It was observed that the RHA calcinated at 600 °C for 2 h showed better strength. However, in the case of WSA and CDA, the most favorable calcination condition in terms of strength development was obtained at 600 °C for 6 h duration. The highest SAI was achieved for the mortar samples containing CDA calcinated at 600 °C for 6 h duration (CDA600-6H). The other two ashes (RHA and WSA) did not qualify as pozzolan according to the ASTM C618 classification. This was due to the presence of silica in crystalline form and lower surface area of the ash material. In this research, the ash was ground only for 30 min after calcination which did not contribute to an increase in the specific surface area and thus the pozzolanic activity. The materials ground for the higher duration are recommended for higher SAI