![]() Most online monitoring systems are based on conventional vibration measurement devices for gear transmissions or bearings in mechanical components. The challenge in many production activities involving large mechanical devices like power transmissions consists in reducing the machine downtime, in managing repairs and in improving operating time. Natural roller bearing fault detection by angular measurement of true instantaneous angular speed In addition, we investigate the potential impact of jet angularities for quark-gluon discrimination. We expect semiinclusive jet angularity measurements to be feasible at the LHC and we present theoretical predictions for the relevant kinematic range. All the necessary ingredients for the resummation at next-to-leading logarithmic (NLL) accuracy are presented within the effective field theory framework. For comparison, we elaborate on the differences to jet angularities measured on an exclusive jet sample. ![]() We establish a factorization theorem within Soft Collinear Effective Theory (SCET) where we consistently take into account in- and out-of-jet radiation by making use of semi-inclusive jet functions. Jet angularities depend on a continuous parameter a allowing for a smooth interpolation between different traditional jet shape observables. We study jet angularity measurements for single-inclusive jet production at the LHC. Jet angularity measurements for single inclusive jet production We present a mathematical model of the latter procedure which reveals the biases introduced into an IPS survey as a result of the estimation process. The estimates are based on observations of either the width of the temporal power spectrum or the shape of the scintillation index-elongation curve. Interplanetary scintillation has been widely used at metre wavelengths for estimating the angular sizes of radio sources in the range 0.1-2.0 arcsec. (author)Īn analysis of interplanetary scintillation as a method of measuring the angular sizes of radio sources Similar evolutionary effects appear to be present for QSOs as well as radio galaxies. The simplest evolutionary scheme that fits the data in the Einstein-de Sitter cosmology indicates that (a) the local RLF steepens considerably at high luminosities, (b) the comoving density of high luminosity sources increases with z in a manner similar to that implied by the log N-log S data and by the V/Vsub(m) test for QSOs, and (c) the mean physical sizes of radio sources evolve with z approximately as (1+z) -1. It is difficult to explain the data with the simple steady-state theory even if identified QSOs are excluded from ths source samples and a local deficiency of strong source is postulated. It is shown that the angular size data provide independent evidence of evolution in source properties with epoch. From the observed slope the RLF is derived in the luminosity range of about 10 23 178 26 W Hz -1 sr -1 to be of the form rho(P)dP proportional to Psup(-2.1)dP. ![]() Since values of theta>approximately 100second arc in the 3C sample arise from sources of small z, the slope of the N(theta) relation in this range is practically independent of the world model and the distribution of source sizes, but depends strongly on the radio luminosity function (RLF). The method of estimating the expected N(theta) and thetasub(m)(S) relations for a uniform distribution of sources in space is outlined. The cosmological implications of the observed angular sizes of extragalactic radio sources are investigated using (i) the log N-log theta relation, where N is the number of sources with an angular size greater than a value theta, for the complete sample of 3CR sources, and (ii) the thetasub(median) vs flux density (S) relation derived from the 3CR, the All-sky, and the Ooty occulation surveys, spanning a flux density range of about 300:1. Several numerical examples demonstrate the application of this inversion methodĬosmology from angular size counts of extragalactic radio sources Because Mie theory is used, the method is applicable to spherical particles of all sizes. A numerical optimization technique is used to determine the strengths of the individual bands that yield the best agreement with the measured scattered-light-intensity profile. The inversion technique for the particle- size-distribution function is based upon matching the measured intensity profile of angularly scattered light with a summation of the intensity contributions of a series of appropriately spaced, narrowband, size-distribution functions. International Nuclear Information System (INIS)Ī new method for determining the particle- size-distribution function of a polydispersion of spherical particles is presented. Polydisperse-particle- size-distribution function determined from intensity profile of angularly scattered light ![]()
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |