8,083 research outputs found
Novel Metaknowledge-based Processing Technique for Multimedia Big Data clustering challenges
Past research has challenged us with the task of showing relational patterns
between text-based data and then clustering for predictive analysis using Golay
Code technique. We focus on a novel approach to extract metaknowledge in
multimedia datasets. Our collaboration has been an on-going task of studying
the relational patterns between datapoints based on metafeatures extracted from
metaknowledge in multimedia datasets. Those selected are significant to suit
the mining technique we applied, Golay Code algorithm. In this research paper
we summarize findings in optimization of metaknowledge representation for
23-bit representation of structured and unstructured multimedia data in order
toComment: IEEE Multimedia Big Data (BigMM 2015
Conjunctive queries with negation over DL-Lite: a closer look
While conjunctive query (CQ) answering over DL-Lite has been studied extensively, there have been few attempts to analyse CQs with negated atoms. This paper deepens the study of the problem. Answering CQs with safe negation and CQs with a single inequality over DL-Lite with role inclusions is shown to be undecidable, even for a fixed TBox and query.Without role inclusions, answering CQs with one inequality is P-hard and with two inequalities CoNP-hard in data complexity
Made in the USA: Technological Corporatism, Infrastructure Regulation, and DuPont 1902-1917
The turn of the twentieth century radically renewed industrial organization across the United States. Early American corporations -- centralized manufacturing hubs with journeymen and apprentices laboring under one roof -- were seldom prepared for the transformations that scientific management and structural reorganization would bring to social relations. At the helm of World War 1, DuPont became the epitome of broader national restructuring. Through a close relationship with American military industries and legislatures, the DuPont brothers came to represent Business as an inseparable component of the State. While labor historiography has primarily focused on organizers’ relationship with regulators, important segments of its inverse -- the relationship between Industry and lawmakers -- have been ignored. In the history of DuPont’s growth lies the story of American labor’s disintegration and the organized dismantling of the civil rights campaigns. The reasons for the supposed failure of American workers to build a mass socialist party cannot be discovered in the structures of accumulation or labor markets alone, but in the insinuation of industrial change into the total sphere of American life. This paper dissects the evolution of DuPont along with American labor. The important question is why and how a corporate-state came to possess such a pervasive and socially dominant nature. DuPont is the ideal case study to analyze how capitalism transformed and joined American politicians in suppressing labor movements, writing policy, and engineering social attitudes between 1902 and 1917
The evolution of sperm morphometry in pheasants
Postcopulatory sexual selection is thought to be a potent evolutionary force driving the
diversification of sperm shape and function across species. In birds, insemination and
fertilisation are separated in time and sperm storage increases the duration of sperm
female interaction and hence the opportunity for sperm competition and cryptic female
choice. We performed a comparative study of 24 pheasant species (Phasianidae,
Galliformes) to establish the relative importance of sperm competition and the duration of
sperm storage for the evolution of sperm morphometry (i.e. size of different sperm traits).
We found that sperm size traits were negatively associated with the duration of sperm
storage but were independent of the risk of sperm competition estimated from relative
testis mass. Our study emphasises the importance of female reproductive biology for the
evolution of sperm morphometry particularly in sperm storing taxa
Early Life Relict Feature in Peptide Mass Distribution
Molecular mass of a biomolecule is characterized in mass spectroscopy by the monoisitopic mass M~mono~ and the average isotopic mass M~av~. We found that peptide masses mapped on a plane made by two parameters derived from M~mono~ and M~av~ form a peculiar global feature in form of a band-gap 5-7 ppm wide stretching across the whole peptide galaxy, with a narrow (FWHM 0.2 ppm) line in the centre. The a priori probability of such a feature to emerge by chance is less than 1:100. Peptides contributing to the central line have elemental compositions following the rules S=0; Z = (2C - N - H)/2 =0, which nine out of 20 amino acid residues satisfy. The relative abundances of amino acids in the peptides contributing to the central line correlate with the consensus order of emergence of these amino acids, with ancient amino acids being overrepresented in on-line peptides. Thus the central line is a relic of ancient life, and likely a signature of its emergence in abiotic synthesis. The linear correlation between M~av~ and M~mono~ reduces the complexity of polypeptide molecules, which may have increased the rate of their abiotic production. This, in turn may have influenced the selection of these amino acid residues for terrestrial life. Assuming the line feature is not spurious, life has emerged from elements with isotopic abundances very close to terrestrial levels, which rules out most of the Galaxy
The efficient computation of transition state resonances and reaction rates from a quantum normal form
A quantum version of a recent formulation of transition state theory in {\em
phase space} is presented. The theory developed provides an algorithm to
compute quantum reaction rates and the associated Gamov-Siegert resonances with
very high accuracy. The algorithm is especially efficient for
multi-degree-of-freedom systems where other approaches are no longer feasible.Comment: 4 pages, 3 figures, revtex
Multi-photon time-of-flight MLEM application for the positronium imaging in J-PET
We develop a positronium imaging method for the Jagiellonian PET (J-PET)
scanners based on the time-of-flight maximum likelihood expectation
maximisation (TOF MLEM). The system matrix elements are calculated on-the-fly
for the coincidences comprising two annihilation and one de-excitation photons
that originate from the ortho-positronium (o-Ps) decay. Using the Geant4
library, a Monte Carlo simulation was conducted for four cylindrical 22Na
sources of beta plus decay with diverse o-Ps mean lifetimes, placed
symmetrically inside the two JPET prototypes. The estimated time differences
between the annihilation and the positron emission were aggregated into
histograms (one per voxel), updated by the weights of the activities
reconstructed by TOF MLEM. The simulations were restricted to include only the
o-Ps decays into back-to-back photons, allowing a linear fitting model to be
employed for the estimation of the mean lifetime from each histogram built in
the log scale. To suppress the noise, the exclusion of voxels with activity
below 2-10 percent of the peak was studied. The estimated o-Ps mean lifetimes
were consistent with the simulation and distributed quasi-uniformly at high
MLEM iterations. The proposed positronium imaging technique can be further
upgraded to include various correction factors, as well as be modified
according to realistic o-Ps decay models
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