1,858 research outputs found
The Single Flavor Color Superconductivity in a Magnetic Field
We investigate the single flavor color superconductivity in a magnetic field.
Because of the absence of the electromagnetic Meissner effect, forming a
nonspherical CSC phase, polar, A or planar, does not cost energy of excluding
magnetic flux. We found that these nonspherical phases do occupy a significant
portion of the phase diagram with respect to magnetic field and temperature and
may be implemented under the typical quark density and the magnetic field
inside a compact star.Comment: 4 pages minor changes, typos fixed, figures redraw
Self-Microlensing in Compact Binary Systems
The signature of the self-microlensing in compact binaries (white dwarfs,
neutron stars and black holes) is a flare with the characteristic time of
typically a few minutes. The probability of detecting these microlensing events
can be as high as for a flux sensitivity of in
magnitude. The discovery of the self-microlensing by binaries would furnish an
additional way to find the masses of the lens and the companion and will be
promising for the searches of black holes.Comment: 5 pages Latex file, Chin. Phys. Lett., in pres
Manual small incision combined with negative power intraocular lens implantation for cataract with high myopia clinical observation
AIM: To evaluate the clinical effect of manual small incision combined with negative power intraocular lens implantation for cataract with high myopia. <p>METHODS: Totally 75 cases(98 eyes)with super high myopia and cataract which had underwent small incision combined with negative power intraocular lens implantation were studied retrospectively. Preoperative axial length and postoperative visual acuity, refractive diopter and expected deviation value(refractive deviation)were recorded. Eye conditions operation complications and postoperative were observed. The patients were followed-up for 6 to 12 months. <p>RESULTS: The mean preoperative axial length was 32.05±1.78mm. Best corrected visual acuity≥0.2 was in 66 eyes, accounting for 67.3%; ≥0.5 in 43 eyes, accounting for 43.9%; the postoperative refractive error <±1.00D was total 48 eyes, accounting for 49.0%; <±2.00D total 78 eyes, accounting for 79.6%. Intra-operative posterior capsular rupture occurred in 3 eyes. Intra-operative posterior elastic layer detachment occurred in 1 cases. The postoperative corneal edema was found in 21 eyes. Postoperative 6 months, posterior capsular opacification was found in 13 eyes, and the visual acuity recovered after Nd:YAG laser cut. No retinal detachment, secondary glaucoma, macular cystoid edema, intraocular lens shift and other complications were found. Two eyes had the symptom of binocular interference post-operation. Three months later, another eye was performed intraocular lens implantation. The symptoms were eliminated post-operation. <p>CONCLUSION: The manual small incision cataract extraction combined with negative power intraocular lens implantation for cataract with high myopia is safe, effective method
On the measurement of the Hubble constant in a local low-density universe
Astrophysical observations indicate that the ``Local Universe" has a
relatively lower matter density () than the predictions of the
standard inflation cosmology and the large-scale motions of galaxies which
provide a mean mass density to be very close to unity. In such a local
underdense region the Hubble expansion may not be representative of the global
behaviour. Utilizing an underdense sphere embedded in a flat universe as the
model of our ``Local Universe", we show that the local Hubble constant would be
1.2 -- 1.4 times larger than the global value on scale of Mpc,
depending on the variation of . This may account for the recent
measurements of the unpleasantly large Hubble constant of 80 km/s/Mpc
using the Cepheid variables in the Virgo cluster and the relative distance
between Virgo and Coma cluster and removes the resulted apparent paradox of the
age of our universe.Comment: 9 pages, Latex file, 3 figures available by reques
- …