Results 71 to 80 of about 921,622 (398)
Type I migration in optically thick accretion discs [PDF]
, 2012 We study the torque acting on a planet embedded in an optically thick accretion disc, using global two-dimensional hydrodynamic simulations. The temperature of an optically thick accretion disc is determined by the energy balance between the viscous heating and the radiative cooling. The radiative cooling rate depends on the opacity of the disc.
arxiv +1 more source
Bilateral Optic Disc Edema in a Patient with Lead Poisoning [PDF]
, 2019 Purpose: Heavy metals, such as lead can cause optic neuropathy. Optic disc neuropathy due to lead intoxication has previously been reported. We report a rare case of lead toxicity-induced optic neuropathy presenting with bilateral hemorrhagic optic disc ...
Abri Aghdam, Kaveh +2 more
core +3 more sources
Pigmented optic disc lesion: A melanoma masquerade
TNOA Journal of Ophthalmic Science and Research, 2020 A 67-year-old male was diagnosed with a pigmented lesion on the optic disc. Optic disc melanocytoma (ODM) is a rare benign, nonprogressive, heavily pigmented lesion arising from the melanocytes of the optic disc.
Zeba Muzammil Shaikh +2 more
doaj +1 more source
Black hole spin-down by truncated disc emission [PDF]
, 2013 The influence of disc radiation capture upon black hole rotational evolution is negligible for radiatively inefficient discs. For the standard thin disc model it is a slight but potentially important effect leading to the equilibrium spin parameter value of about 0.998. For optically thin discs, the fraction of disc radiation captured by the black hole
arxiv +1 more source
Automatic Segmentation of Optic Disc in Eye Fundus Images: A Survey [PDF]
, 2015 Optic disc detection and segmentation is one of the key elements for automatic retinal disease screening systems. The aim of this survey paper is to review, categorize and compare the optic disc detection algorithms and methodologies, giving a ...
Allam, Ali +2 more
core +3 more sources
The search for gas in debris discs: ALMA detection of CO gas in HD 36546 [PDF]
, 2021 Debris discs represent the last stages of planet formation and as such are expected to be depleted of primordial gas. Nonetheless, in the last few years the presence of cold gas has been reported in $\sim$ 20 debris discs from far-IR to (sub-)mm observations and hot gas has been observed in the optical spectra of debris discs for decades.
arxiv +1 more source
An optically thick inner corona geometry for the Very High State Galactic Black Hole XTE J1550-564 [PDF]
Mon.Not.Roy.Astron.Soc.371:1216,2006, 2005 (truncated version) The X-ray spectra of Galactic binary systems in the very high state show both strong disk emission and a strong, steep tail to high energies. We use simultaneous optical-ASCA-RXTE data from the black hole transient XTE J1550-564 as a specific example, and show that these have disc spectra which are significantly lower in temperature
arxiv +1 more source
A Case of Optic Nerve Atrophy with Severe Disc Cupping after Methanol Poisoning [PDF]
, 2011 We report a rare case of optic nerve atrophy with severe disc cupping resulting from methanol poisoning. A 30-year-old man presented to the hospital complaining of decreased visual acuity in both eyes a day after drinking alcohol containing methanol. His
Bang +17 more
core +2 more sources
FEBS Letters, EarlyView.α2 → 8 polysialic acid elicits poor immunogenicity. Small‐angle scattering shows a supramolecular structure with parallel‐chain binding, although in different forms at μm and mm calcium. The major histocompatibility complex requires molecular weights around 2000 Da to produce antibodies, and 2000 Da polysialic oligomers will bind in these structures ...
Kenneth A. Rubinson
wiley +1 more source
Intensity and polarization of radiation reflected from accretion disc [PDF]
, 2018 We consider the reflection of non-polarized radiation from the point-like sources above the accretion discs both the optically thick and optically thin. We investigate the dependence of the polarization of reflected radiation on the aperture angle of incident radiation.
arxiv +1 more source