1,223 research outputs found
The CMB Dipole and Circular Galaxy Distribution
The validity of Hubble's law defies the determination of the center of the
big bang expansion, even if it exists. Every point in the expanding universe
looks like the center from which the rest of the universe flies away. In this
article, the author shows that the distribution of apparently circular galaxies
is not uniform in the sky and that there exists a special direction in the
universe in our neighborhood. The data is consistent with the assumption that
the tidal force due to the mass distribution around the universe center causes
the deformation of galactic shapes depending on its orientation and location
relative to the center and our galaxy. Moreover, the cmb dipole data can also
be associated with the center of the universe expansion, if the cmb dipole at
the center of our supercluster is assumed to be due to Hubble flow. The
location of the center is estimated from the cmb dipole data. The direction to
the center from both sets of data is consistent and the distance to the center
is computed from the cmb dipole data.Comment: 9 pages, 3 figures (10 figure captions), 1 tabl
Regulation of Sindbis virus RNA replication: uncleaved P123 and nsP4 function in minus-strand RNA synthesis, whereas cleaved products from P123 are required for efficient plus-strand RNA synthesis
Nonstructural proteins of Sindbis virus, nsPl, nsP2, nsP3, and nsP4, as well as intermediate polyproteins, are produced from two precursor polyproteins, Pl23 and Pl234, by a proteolytic enzyme encoded in the C-terminal half of nsP2. We studied the requirements for and the functions of the intermediate and mature processing products for Sindbis virus RNA synthesis by using site-directed mutants which have a defect(s) in processing the 1/2, 2/3, or 3/4 cleavage sites either singly or in various combinations. A mutant defective in cleaving both the 1/2 and 2/3 sites, which makes only uncleavable Pl23 and mature nsP4 as final products, produced 10-3 as much virus as did the wild-type virus after 10 hat 30°C and was nonviable at 40°C. A mutant defective in processing the 2/3 site, which makes nsPl, nsP4, and P23 as well as precursor Pl23, grew 10-1 as efficiently as wild-type virus at 30°C and 10-3 as efficiently at 40°C. Early minus-strand RNA synthesis by these mutants was as efficient as that by wild-type virus, whereas plus-strand RNA synthesis was substantially decreased compared with that by wild-type virus. A mutant defective in processing the 3/4 site was nonviable at either 30 or 40°C. The 3/4 site mutant could be complemented by the mutant unable to cleave either the 1/2 or 2/3 site, which can provide mature nsP4. We interpret these results to signify that (i) mature nsP4 is required for RNA replication, (ii) nsP4 and uncleaved Pl23 function in minus-strand RNA synthesis, and (iii) cleavage of Pl23 is required for efficient plus-strand RNA synthesis. We propose that Sindbis virus RNA replication is regulated by differential proteolysis of Pl23. Early in infection, nsP4 and uncleaved Pl23 form transient minus-strand RNA replication complexes which vanish upon cleavage of Pl23. Later in infection, an elevated level of viral proteinase activity eliminates de novo synthesis of Pl23, and no further synthesis of minus-strand RNA is possible. In contrast, nsP4 and cleavage products from Pl23 form plus-strand RNA replication complexes which are stable and remain active throughout the infection cycle
ISUM (Idealized Structural Unit Method) Applied to Marine Structures(Mechanics, Strength & Structural Design)
Effect of zero energy bound states on macroscopic quantum tunneling in high-Tc superconductor junctions
The macroscopic quantum tunneling (MQT) in the current biased high-Tc
superconductor Josephson junctions and the effect of the zero energy bound
states (ZES) on the MQT are theoretically investigated. We obtained the
analytical formula of the MQT rate and showed that the presence of the ZES at
the normal/superconductor interface leads to a strong Ohmic quasiparticle
dissipation. Therefore, the MQT rate is noticeably inhibited in compared with
the c-axis junctions in which the ZES are completely absent.Comment: 4 pages, 1 figure, comment and reference about recent experiment
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Survey of Methods of Analysis of the Strength of Stiffened and Unstiffened Plates Subjected to Combined In-Plane and Lateral Loads
New Efficient and Accurate Method of Nonlinear Analysis of Offshore Tubular Frames (the Idealized Structural Unit Method) (Report I) : Development of Static Theory and Method(Mechanics, Strength & Structure Design)
Competition between singlet and triplet pairings in Na_xCoO_2 yH_2O
We discuss the pairing symmetry of a cobaltate superconductor
NaCoO HO by adopting an effective single band model that
takes into account the hole pockets, as discussed in our previous paper
[to appear in Phys. Rev. Lett.] Here we consider the off-site repulsions in
addition to the on-site repulsion considered in our previous study. We show
that the spin-triplet f-wave pairing proposed in our previous study is robust
to some extent even in the presence of off-site repulsions. However, f-wave
pairing gives way to singlet pairings for sufficiently large values of off-site
repulsions. Among the singlet pairings, i-wave and extended s-wave pairings are
good candidates which do not break time reversal symmetry below in
agreement with the experiments.Comment: 12 page
Ultimate Strength Analysis of Double Bottom Structure by "Idealized Structural Unit Method"(Welding Mechanics, Strength & Design)
Buckling and Ultimate Strength Interactions of Plates and Stiffened Plates under Combined Loads (1st Report) : Inplane Biaxial and Shearing Forces(Mechanics, Strength & Structural Design)
On Buckling Accepted Design of Ship Structures Utilizing High Tensile Steels(Mechanics, Strength & Structural Design)
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