Scenarios about the long-time damage of silicon as material and detectors operating beyond LHC collider conditions

For the new hadron collider LHC and some of its updates in luminosity and energy, as SLHC and VLHC, the silicon detectors could represent an important option, especially for the tracking system and calorimetry. The main goal of this paper is to analyse the expected long-time degradation in the bulk of the silicon as material and for silicon detectors, in continuous radiation field, in these hostile conditions. The behaviour of silicon in relation to various scenarios for upgrade in energy and luminosity is discussed in the frame a phenomenological model developed previously by the authors. Different silicon material parameters resulting from different technologies are considered to evaluate what materials are harder to radiation and consequently could minimise the degradation of device parameters in conditions of continuous long time operation.Comment: submitted to Physica Scripta Work in the frame of CERN RD-50 Collaboratio

High pT and jet physics from RHIC to LHC

The observation of the strong suppression of high pT hadrons in heavy ion collisions at the Relativistic Heavy Ion Collider (RHIC) at BNL has motivated a large experimental program using hard probes to characterize the deconfined medium created. However what can be denoted as ``leading particle physics'' accessible at RHIC presents some limitations which motivate at higher energy the study of much more penetrating objects: jets. The gain in center of mass energy expected at the Large Hadron Collider (LHC) at CERN will definitively improve our understanding on how the energy is lost in the system opening a new major window of study: the physics of jets on an event-by-event basis. We will concentrate on the expected performance for jet reconstruction in ALICE using the EMCal calorimeter.Comment: 14 pages, 14 figures, Proceedings of the Workshop on Relativistic Nuclear Physics (WRNP) 2007, Kiev, Ukraine. Conference Info: http://wrnp2007.bitp.kiev.ua/. Final version published in "Physics of Atomic Nuclei

Requestionner les approches de santé publique après Ebola

Anthropologists contributed to the response to the 2014-2016 Ebola outbreak in three ways: as Ebola experts, cultural mediators between populations and caregivers, and researchers. This article presents a preliminary review of approaches, contributions and related issues based on a literature review, case studies and debates. The anthropological research discussed in this article concerns four themes: epidemiological contexts of transmission; cultural interpretation of illness and social responses; social construction of stakeholders' experience; critical analysis of public health interventions. In addition to insightful contributions, particularly regarding the socio-political contexts and their interfaces with global public health measures, anthropologists tested forms of communication to facilitate access of public health actors to their results. However, these heterogeneous forms of engagement raise a number of questions, especially when they reflect anthropological interpretations that exclude any critical or reflexive dimension, or when anthropology is considered to be similar to social intervention. Nevertheless, anthropological research provides a major contribution, which could be even greater if transnational networks set up by researchers to analyse the socio-political, economic and biocultural dimensions of emerging epidemics are supported in order to improve "preparedness" for future health crises