نتایج جستجو برای: density tracer
تعداد نتایج: 491143 فیلتر نتایج به سال:
We investigate explosive nuclear burning in core collapse supernovae by coupling a tracer particle method to one and two-dimensional Eulerian hydrodynamic calculations. Adopting the most recent experimental and theoretical nuclear data, we compute the nucleosynthetic yields for 15 M⊙ stars with solar metallicity, by post-processing the temperature and density history of advected tracer particle...
We scrutinize three decades of probability density displacement distribution in a simple colloidal suspension with hard-sphere interactions. In this index-matched and density-matched solvent, fluorescent tracer nanoparticles diffuse among matrix particles that are eight times larger, at concentrations from dilute to concentrated, over times up to when the tracer diffuses a few times its size. D...
This paper details a free surface method using an explicit time stepping scheme for use in z-coordinate ocean models. One key property that makes the method especially suitable for climate simulations is its very stable numerical time stepping scheme, which allows for the use of a long density time step, as commonly employed with coarse-resolution rigid-lid models. Additionally, the effects of ...
We generate stellar distribution functions (DFs) in triaxial haloes in order to examine the reliability of slopes Γ ≡ ∆logM/∆logr inferred by applying mass estimators of the formM ∝ Reσ 2 (i.e. assuming spherical symmetry, where Re and σ are luminous effective radius and global velocity dispersion, respectively) to two stellar sub-populations independently tracing the same gravitational potenti...
Plasma cholesteryl ester transfer protein (CETP) mediates the transfer of cholesteryl esters (CE) between lipoproteins and was reported to also directly mediate the uptake of high density lipoprotein (HDL) CE by human Hep G2 cells and fibroblasts. The present study investigates that uptake and its relationship to a pathway for "selective uptake" of HDL CE that does not require CETP. HDL3 labele...
We generate stellar distribution functions (DFs) in triaxial haloes in order to examine the reliability of slopes ≡ log M/ log r inferred by applying mass estimators of the form M ∝ Reσ 2 (i.e. assuming spherical symmetry, where Re and σ are luminous effective radius and global velocity dispersion, respectively) to two stellar subpopulations independently tracing the same gravitational potentia...
The capability of using imperfect stochastic reduced-order models to capture crucial passive tracer statistics such as tracer energy spectrum, tracer intermittency, and eddy diffusivity is investigated. The passive scalar field is advected by a two-layer baroclinic turbulent flow which can generate various representative regimes in atmosphere and ocean. Much simpler and more tractable linear Ga...
Objective(s): 99mTc-TRODAT-1, which binds to the dopamine transporter, could be used to image the dopaminergic system in diagnosis of Parkinson’s disease (PD). PD can be classified into two groups: late onset Parkinson’s disease (LOPD) and early onset Parkinson’s disease (EOPD). In this study we tried to determine the TRODAT SPECT findings in EOPD as compared to LOPD.Methods: Fifteen patients w...
A novel approach to in vivo receptor binding experiments is presented which allows direct quantitation of binding site densities. The method is based on an equilibrium model of tracer uptake and is designed to produce a static distribution proportional to receptor density and to minimize possible confounding influences of regional blood flow, blood-brain barrier permeability, and nonspecific bi...
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