5,547 research outputs found
ICL: The Image Composition Language
The Image Composition Language (ICL) provides a convenient way for programmers of interactive graphics application programs to define how the video look-up table of a raster display system is to be loaded. The ICL allows one or several images stored in the frame buffer to be combined in a variety of ways. The ICL treats these images as variables, and provides arithematic, relational, and conditional operators to combine the images, scalar variables, and constants in image composition expressions. The objective of ICL is to provide programmers with a simple way to compose images, to relieve the tedium usually associated with loading the video look-up table to obtain desired results
Nucleon cosmological constant term and flavor structure of the gravitational form factors
The gravitational form factors furnish information on the mechanics of the
nucleon. It is essential to compute the generalized isovector-vector form
factors to examine the flavor structure of the gravitational form factors. The
flavor-decomposed form factors reveal the internal structure of the nucleon.
The up quark dominates over the down quark for the mass and spin of the
nucleon, whereas the down quark takes over the up quark for the -term form
factor. We investigate for the first time the isovector cosmological constant
term of the nucleon and its physical implications. The flavor-decomposed
cosmological constant terms of the nucleon unveil how the up-quark contribution
is exactly canceled by the down-quark contribution inside a nucleon within the
framework of the pion mean-field approach. While the nucleon cosmological
constant term does not contribute to the nucleon mass, its flavor structure
sheds light on how the strong force fields due to the cosmological constant
term characterize the stability of the nucleon.Comment: 7 pages and 4 figures. The text was improved and extende
Gravitational form factors of the baryon octet with flavor SU(3) symmetry breaking
We investigate the gravitational form factors of the baryon octet within the
framework of the SU(3) chiral quark-soliton model, considering the effects of
flavor SU(3) symmetry breaking, and the corresponding energy-momentum tensor
distributions. We examine the effects of flavor SU(3) symmetry breaking to the
mass, angular momentum, pressure, and shear force distributions of the baryon
octet. We first find that a heavier baryon is energetically more compact than a
lighter one. For the spin distributions of the baryon octet, they are properly
normalized to their spins and are decomposed into the flavor-singlet axial
charge and the orbital angular momentum even when the flavor SU(3) symmetry is
broken. While the effects of the flavor SU(3) symmetry breaking differently
contribute to the angular momentum distributions for the octet baryons, they
are found to be rather small. The spin and orbital angular momentum almost
equally contribute to the angular momentum distributions for the octet baryons.
We also estimate the effects of the flavor SU(3) symmetry breaking to the
pressure and shear force distributions. Interestingly, even if we include the
effects of the SU(3) flavor symmetry breaking, the shear force distributions
are kept to be positive over . It indicates that the Polyakov & Schweitzer
local stability condition is kept to be intact with the flavor SU(3) symmetry
broken. Lastly, we discuss how much the gravitational form factors vary with
the effects of flavor SU(3) symmetry breaking considered.Comment: 27 pages, 8 figure
Dynamics of Individual BKCa Channels in Live Cells Monitored by Site-Specific Labeling Using Quantum Dots
LINE FUSION GENES: a database of LINE expression in human genes
BACKGROUND: Long Interspersed Nuclear Elements (LINEs) are the most abundant retrotransposons in humans. About 79% of human genes are estimated to contain at least one segment of LINE per transcription unit. Recent studies have shown that LINE elements can affect protein sequences, splicing patterns and expression of human genes. DESCRIPTION: We have developed a database, LINE FUSION GENES, for elucidating LINE expression throughout the human gene database. We searched the 28,171 genes listed in the NCBI database for LINE elements and analyzed their structures and expression patterns. The results show that the mRNA sequences of 1,329 genes were affected by LINE expression. The LINE expression types were classified on the basis of LINEs in the 5' UTR, exon or 3' UTR sequences of the mRNAs. Our database provides further information, such as the tissue distribution and chromosomal location of the genes, and the domain structure that is changed by LINE integration. We have linked all the accession numbers to the NCBI data bank to provide mRNA sequences for subsequent users. CONCLUSION: We believe that our work will interest genome scientists and might help them to gain insight into the implications of LINE expression for human evolution and disease. AVAILABILITY
The 750 GeV Diphoton Excess May Not Imply a 750 GeV Resonance
We discuss non-standard interpretations of the 750 GeV diphoton excess
recently reported by the ATLAS and CMS Collaborations which do not involve a
new, relatively broad, resonance with a mass near 750 GeV. Instead, we consider
the sequential cascade decay of a much heavier, possibly quite narrow,
resonance into two photons along with one or more invisible particles. The
resulting diphoton invariant mass signal is generically rather broad, as
suggested by the data. We examine three specific event topologies - the antler,
the sandwich, and the 2-step cascade decay, and show that they all can provide
a good fit to the observed published data. In each case, we delineate the
preferred mass parameter space selected by the best fit. In spite of the
presence of invisible particles in the final state, the measured missing
transverse energy is moderate, due to its anti- correlation with the diphoton
invariant mass. We comment on the future prospects of discriminating with
higher statistics between our scenarios, as well as from more conventional
interpretations.Comment: Discussion about the ATLAS Moriond EW2016 added. Matched to PRL
accepted versio
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