We simulate the Lyα forest in a standard CDM universe using a 2–level hierarchical grid code to evolve the dark and baryonic matter components self–consistently. We solve the time–dependent ionization equations for hydrogen and helium, adopting the Haardt & Madau (1996) estimate for the metagalactic UV radiation background. We compare our simulation results with the measured properties of the L...

A quantitative immunocytochemical method was used to study the regional levels of glutamate in two types of lamprey (Ichtyomyzon unicuspis) axon, which both activate excitatory amino acid receptors, but which when active exhibit different firing patterns. Giant reticulospinal axons fire in brief bursts, while dorsal column axons, mainly belonging to cutaneous afferents, show a sustained firing ...

Flat density cores have been obtained for a limited number of clusters of galaxies by strong gravitational lensing. Using a phenomenological equation of state (EOS) describing the full-to-partial degeneracy, we integrate the equation of hydrostatic equilibrium. The EOS is based on an assumption that the local kinetic energy of a classical particle induced by the gravity dissolves the quantum st...

We have conducted a long slit search for low surface brightness Lyman α emitters at redshift 2.67 < z < 3.75. A 92 hour long exposure with the ESO VLT FORS2 instrument down to a 1σ surface brightness detection limit of 8× 10 erg cm s ⊓⊔′′ per ⊓⊔′′ aperture, yielded a sample of 27 single line emitters with fluxes of a few ×10−18 erg scm. We present arguments that most objects are indeed Lyα. The...

Fires can cause substantial damage to structures, both non-structural and structural, with economic losses of almost 1% GDP in developed countries. Whilst design codes allow engineers to design for the primary design driver, property protection is rarely, if ever, designed for. Quantification and design around property protection has been used for some time in the seismic community, particularl...

Measurements of Pa, Th and Th concentrations have been made on five water-column profiles along the western margin of the Madagascar and Mascarene Basins in the southern Indian Ocean. These measurements help to fill a significant gap in the global coverage of water-column Th, Th and Pa data. Th concentrations vary, but generally increase with depth, suggesting higher particle loading in deeper ...

We present the results of a mid-infrared (λ ' 7 μm) imaging survey of a sample of 24 starless dense cores carried out at an angular resolution of 6′′ with the ISOCAM camera aboard the Infrared Space Observatory (ISO). The targeted cores are believed to be pre-stellar in nature and to represent the initial conditions of low-mass, isolated star formation. In previous submillimeter dust continuum ...

As part of an international intercomparison project, a set of single-column models (SCMs) and cloud-resolving models (CRMs) are run under the weak-temperature gradient (WTG) method and the damped gravity wave (DGW) method. For each model, the implementation of the WTG or DGW method involves a simulated column which is coupled to a reference state defined with profiles obtained from the same mod...

M and control of distillation columns is a research area that evokes considerable interest. On the one hand, substantial savings are possible with good controllers, on the other hand, distillation columns are often used as test cases for new methods of model based controller design. Strongly nonlinear behavior and high order are the characteristics that present challenges when designing control...