Search results for "Ull"

MINISAT-01: Hybrid satellite for science and technology

2003

Abstract The MINISAT-01 is a good example of a small hybrid space mission for science and technology. The MINISAT-01 main goal was to prove the Spanish industrial capability to develop a space mission including flight hardware, ground segment support, launch and operations. MINISAT-01 science was addressed to perform astronomical observations and microgravity experiments. The Payload has also a hybrid character. It is a combination of a previously flown experiment on fluid mechanics in microgravity (CPLM), a fully developed astronomical far-ultraviolet spectroscope (EURD) and a demonstrator of technology for a gamma-ray imagers (LEGRI). A small experiment to deploy systems in space was also…

Mechanisms of Banner Cloud Formation

2013

Abstract Banner clouds are clouds in the lee of steep mountains or sharp ridges. Their formation has previously been hypothesized as due to three different mechanisms: (i) vertical uplift in a lee vortex (which has a horizontal axis), (ii) adiabatic expansion along quasi-horizontal trajectories (the so-called Bernoulli effect), and (iii) a mixing cloud (i.e., condensation through mixing of two unsaturated air masses). In the present work, these hypotheses are tested and quantitatively evaluated against each other by means of large-eddy simulation. The model setup is chosen such as to represent idealized but prototypical conditions for banner cloud formation. In this setup the lee-vortex mec…

Full configuration interaction calculation of singlet excited states of Be3

2004

The full configuration interaction (FCI) study of the singlets vertical spectrum of the neutral beryllium trimer has been performed using atomic natural orbitals [3s2p1d] basis set. The FCI triangular equilibrium structure of the ground state has been used to calculate the FCI vertical excitation energies up to 4.8 eV. The FCI vertical ionization potential for the same geometry and basis set amounts to 7.6292 eV. The FCI dipole and quadrupole transition moments from the ground state are reported as well. The FCI electric quadrupole moment of the X (3)A(1) (') ground state has been also calculated with the same basis set (Theta(zz)=-2.6461 a.u., Theta(xx)=Theta(yy)=-1/2Theta(zz)). Twelve of …

Untersuchungen zur Sterinsynthese des Ascomyceten Aureobasidium (Dematium) pullulans / Studies of the Sterolsynthesis in the Fungus Aureobasidium (De…

1985

Abstract Isolation and identification of sterols from culture extracts of the fungus Aureobasidium (Dematium) pullulans yielded metabolites with key function in sterol synthesis. By proof of squalene, lanosterol/dihydrolanosterol, desmosterol, ergosterol, cholesterol, stigmasterol and β-sitosterol it was possible to work out a general synthesis-scheme for the building-up of sundry sterols in Ascomycetes.

Sealing the Cranial Base Access After Endonasal Endoscopic Approach: Reabsorption Rate of Fat Graft in the "3FTechnique".

2022

Le prieuré de Jully-les-Nonnains : Quelques réflexions relatives à la destination et l'usage du Psautier-hymnaire ms539 de la bibliothèque municipale…

2018

International audience

Proteomic analysis of Kveim reagent identifies targets of cellular immunity in sarcoidosis

2017

Background Kveim-reagent (Kv) skin testing was a historical method of diagnosing sarcoidosis. Intradermal injection of treated sarcoidosis spleen tissue resulted in a granuloma response at injection site by 4–6 weeks. Previous work indicates proteins as the possible trigger of this reaction. We aimed to identify Kv-specific proteins and characterise the ex vivo response of Peripheral Blood Mononuclear Cells (PBMCs) from sarcoidosis, tuberculosis and healthy control patients when stimulated with both Kv and selected Kv-specific proteins. Methods Kv extracts were separated by 1D-SDS-PAGE and 2D-DIGE and then underwent mass spectrometric analysis for protein identification. Sarcoidosis and con…

The Bayesian Learning Automaton — Empirical Evaluation with Two-Armed Bernoulli Bandit Problems

2009

The two-armed Bernoulli bandit (TABB) problem is a classical optimization problem where an agent sequentially pulls one of two arms attached to a gambling machine, with each pull resulting either in a reward or a penalty. The reward probabilities of each arm are unknown, and thus one must balance between exploiting existing knowledge about the arms, and obtaining new information.

Pupils’ mental models of a pulley in balance, and how the models are changed by successive pulley demonstrations

2012

Use of bitumen-stabilised ballast for improving railway trackbed conventional maintenance

2018

Despite its many advantages, ballasted track needs frequent maintenance to ensure an adequate quality of service. However, tamping, traditionally used to correct geometry, causes ballast degradation and loosening of the already compacted ballast layer, which quickly returns the track to its pre-maintenance position. Then, other maintenance techniques such as stoneblowing, as well as diverse solutions that reinforce trackbed, have been developed to reduce ballast settlement and particles degradation. Given the need to further advance research in this field, bitumen-stabilised ballast (BSB) has started to be investigated by the authors as a feasible solution thanks to its easy and quick appl…