4,196 research outputs found
High-Energy Physics applications on the grid
This is a summary of the experience of the LCG ARDA group over the 4-year project in collaborating with the LHC experiments (and other user communities in the EGEE project)
Sagittarius dwarf spheroidal galaxy observed by H.E.S.S
Dwarf spheroidal galaxies are characterized by a large measured mass-to-light
ratio and are not expected to be the site of high-luminosity non-thermal
high-energy gamma-ray emissions. Therefore they are among the most promising
candidates for indirect searches of dark matter particle annihilation signals
in gamma rays. The Sagittarius dwarf spheroidal galaxy has been regularly
observed by the High Energy Stereoscopic System (H.E.S.S.) of Cherenkov
telescopes for more than 90 hours, searching for TeV gamma-ray emission from
annihilation of dark matter particles. In absence of a significant signal, new
constraints on the annihilation crosssection of the dark matter particles
applicable for Majorana Weakly Interacting Massive Particles (WIMPs) are
derived.Comment: In Proceedings of the 33rd International Cosmic Ray Conference
(ICRC2013), Rio de Janeiro (Brazil
Abstract Language and Student Response During Guided Play
Many children enter school with little to no external language exposure—many times due to lack of language support by early childcare providers. The demands of Kindergarten and the Common Core State Standards (CCSS) expect students to possess higher-order thinking skills, including academic language use to support and reason with texts in conversation. The current qualitative study examined guided play conversations with 1 pre-k student, involving use of academic language to display how teacher reflection guided student language expansion. The participant responded to multiple questions and prompts regarding read alouds during guided play. Results suggest that teacher effectiveness of promoting oral language expansion is evident if open questions are apparent during guided play because they encourage independent, deep thinking
Dependable Distributed Computing for the International Telecommunication Union Regional Radio Conference RRC06
The International Telecommunication Union (ITU) Regional Radio Conference
(RRC06) established in 2006 a new frequency plan for the introduction of
digital broadcasting in European, African, Arab, CIS countries and Iran. The
preparation of the plan involved complex calculations under short deadline and
required dependable and efficient computing capability. The ITU designed and
deployed in-situ a dedicated PC farm, in parallel to the European Organization
for Nuclear Research (CERN) which provided and supported a system based on the
EGEE Grid. The planning cycle at the RRC06 required a periodic execution in the
order of 200,000 short jobs, using several hundreds of CPU hours, in a period
of less than 12 hours. The nature of the problem required dynamic
workload-balancing and low-latency access to the computing resources. We
present the strategy and key technical choices that delivered a reliable
service to the RRC06
An architecture to manage security services for cloud applications
The uptake of virtualization and cloud technologies has pushed novel development and operation models for the software, bringing more agility and automation. Unfortunately, cyber-security paradigms have not evolved at the same pace and are not yet able to effectively tackle the progressive disappearing of a sharp security perimeter. In this paper, we describe a novel cyber-security architecture for cloud-based distributed applications and network services. We propose a security orchestrator that controls pervasive, lightweight, and programmable security hooks embedded in the virtual functions that compose the cloud application, pursuing better visibility and more automation in this domain. Our approach improves existing management practice for service orchestration, by decoupling the management of the business logic from that of security. We also describe the current implementation stage for a programmable monitoring, inspection, and enforcement framework, which represents the ground technology for the realization of the whole architecture
Secondary school students’ strategies in solving arrangement problems
Project PID2019-105601GB-I00 / AEI / 10.13039/50110001103
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