The ELENA facility

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Elena P . Ivanova *

A survey of the extracellular ATP levels of 86 heterotrophic bacteria showed that gram-negative bacteria of the genera Sulfitobacter, Staleya, and Marinobacter secreted elevated amounts of extracellular ATP, ranging from 6.0 to 9.8 pM ATP/colony forming unit (cfu), and that gram-positive bacteria of the genera Kocuria and Planococcus secreted up to 4.1 pM ATP/cfu. Variations in the levels of ex...

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Elena: A Mediation Infrastructure for Educational Services

The paper presents the work of the Elena project. The contribution of this paper is twofold: The first part of the paper elaborates on the notion of educational services. Educational services are differentiated from learning objects and put in context of web services. A model for educational services is introduced and current limitations of metadata standards are addressed. In the second part o...

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Intra-beam Scattering Effects in Elena

Intra-Beam Scattering (IBS) is one of the main limiting processes for the performance of low energy ion storage rings, such as the Extra Low ENergy Antiproton ring (ELENA) that is being constructed at CERN. IBS effects limit the achievable equilibrium 6D beam phase space volume during the cooling process, as well as the stored beam intensity. In this contribution we analyse the IBS effects on t...

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ELENA: Creating a Smart Space for Learning

The objective of the ELENA project is to demonstrate the feasibility of smart spaces for learning. Smart learning spaces are defined as educational service mediators, which allow the consumption of heterogeneous learning services via assessment tools, learning management systems, educational (meta) repositories and live delivery systems such as video conferencing systems or iTV (see Figure 1). ...

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Elena: an Upgrade to the Anti-proton Decelerator at Cern

CERN has a long tradition of pursuing fundamental physics on a variety of energy scales. For anti-protons CERN famously produced the high-energy SPS beam but also the world’s only and unique sources of low-energy anti-protons – first the Low Energy Anti-proton Ring (LEAR) and thereafter the Anti-proton Decelerator (AD). The scientific demand for low-energy anti-protons at the AD continues to gr...

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ژورنال

عنوان ژورنال: Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences

سال: 2018

ISSN: 1364-503X,1471-2962

DOI: 10.1098/rsta.2017.0266