2,982 research outputs found
LHCb RICH Upgrade: an overview of the photon detector and electronics system
The LHCb experiment is one of the four large detectors operating at the LHC
at CERN and it is mainly devoted to CP violation measurements and to the search
for new physics in rare decays of beauty and charm hadrons. The data from the
two Ring Image Cherenkov (RICH-1 and RICH-2) detectors are essential to
identify particles in a wide momentum range. From 2019 onwards 14 TeV
collisions with luminosities reaching up to cm s
with 25 ns bunch spacing are planned, with the goal of collecting 5 fb
of data per year. In order to avoid degradation of the PID performance at such
high rate (40 MHz), the RICH detector has to be upgraded. New photodetectors
(Multi-anode photomultiplier tubes, MaPMTs) have been chosen and will be read
out using a 8-channels chip, named CLARO, designed to sustain a photon counting
rate up to 40 MHz, while minimizing the power consumption and the cross-talk. A
128-bit digital register allows selection of thresholds and attenuation values
and provides features useful for testing and debugging. Photosensors and
electronics are arranged in basic units, the first prototypes of which have
been tested in charged particle beams in autumn 2014. An overview of the CLARO
features and of the readout electronics is presented
Photodetectors and front-end electronics for the LHCb RICH upgrade
The RICH detectors of the LHCb experiment provide identification of hadrons
produced in high energy proton-proton collisions in the LHC at CERN over a wide
momentum range (2 to 100 GeV/c). Cherenkov light is collected on photon
detector planes sensitive to single photons. The RICH will be upgraded (in
2019) to read out every bunch crossing, at a rate of 40 MHz. The current hybrid
photon detectors (HPD) will be replaced with multi-anode photomultiplier tubes
(customisations of the Hamamatsu R11265 and the H12699 MaPMTs). These
88 pixel devices meet the experimental requirements thanks to their
small pixel size, high gain, negligible dark count rate (50 Hz/cm)
and moderate cross-talk. The measured performance of several tubes is reported,
together with their long-term stability. A new 8-channel front-end chip, named
CLARO, has been designed in 0.35 m CMOS AMS technology for the MaPMT
readout. The CLARO chip operates in binary mode and combines low power
consumption (\hbox{1 mW/Ch}), wide bandwidth (baseline restored in
25 ns) and radiation hardness. A 12-bit digital register permits the
optimisation of the dynamic range and the threshold level for each channel and
provides tools for the on-site calibration. The design choices and the
characterization of the electronics are presented
Development of an Extended Product Lifecycle Management through Service Oriented Architecture.
Organised by: Cranfield UniversityThe aim of this work is to define new business opportunities through the concept of Extended Product
Lifecycle Management (ExtPLM), analysing its potential implementation within a Service Oriented
Architecture. ExtPLM merges the concepts of Extended Product, Avatar and PLM. It aims at allowing a
closer interaction between enterprises and their customers, who are integrated in all phases of the life cycle,
creating new technical functionalities and services, improving both the practical (e.g. improving usage,
improving safety, allowing predictive maintenance) and the emotional side (e.g. extreme customization) of
the product.Mori Seiki â The Machine Tool Company; BAE Systems; S4T â Support Service Solutions: Strategy and Transitio
Sergio Genovesi: Tracce dellâinforme. Lâindecostruibile e la filosofia dellâevento in Jacques Derrida
Recensione a "Tracce dellâinforme. Lâindecostruibile e la filosofia dellâevento in Jacques Derrida", opera prima di Sergio Genovesi, pubblicata da Mimesis Edizioni per la collana "Eterotopie"
Immersive 360° video for forensic education
Throughout the globe, training in the investigation of forensic crime scene work is a vital part of the overall training process within Police Academies and forensic programs throughout the world. However, the exposure of trainee forensic officers to real life scenes, by instructors, is minimal due to the delicate nature of information presented within them and the overall difficulty of Forensic investigations. Virtual Reality (VR) is computer technology utilising headsets, to produce lifelike imageries, sounds and perceptions simulating physical presence inside a virtual setting to a user. The user is able to look around the virtual world and often interact with virtual landscapes or objects. VR headsets are headâmounted goggles with a screen in front of the eyes (Burdea & Coffet 2003). The use of VR varies widely from personal gaming to classroom learning. Uses also include computerised tools that are used solely online. The current use of VR within Forensic Science is that it is used widely in several capacities that include the training and examination of new forensic officers. However, there is minimal review and authentication of the efficiency of VR use for the teaching of forensic investigation. This is surprising, as the VR field has experienced rapid expansion in the educating of many varying fields over the past few years. Even though VR could enhance forensic training by offering another, perhaps more versatile, engaging way of learning, no devoted VR application has yet been commercially implemented for forensic examination education. Research into VR is a fairly young field, however the technology and use of it is still rapidly growing and the improvement of interactive tools is inevitably having an impact on all facets of learning and teaching
The actual effect of the representative role: a methodological clarification for representation studies
Previous studies on the representative role compare representativesâ behaviors with individualsâ behaviors. Nevertheless, since representatives are a particular type of group members, previous designs inevitably did not distinguish between in-group favoritism effects and the actual effect of the representative role. Carrying on this methodological criticism, the present thesis suggests a new experimental design aimed at disentangling the two effects. Specifically, this studyâs aim is to causally determine the effect of the representative role on individualsâ cooperation and understand which mechanisms foster the representation effect. To do so, an online experiment was conducted on Amazon Mechanical Turk. The results show that neither the in-group favoritism effect nor the effect of the representative role alone seem to have any significant influence on participantsâ cooperative behaviors, but by conducting the same analysis done by previous studies a decrease in cooperation for representatives can be detected. However, previous interpretations are criticized and the decrease in cooperation is attributed to the interaction between the representation effect and the in-group favoritism effect and not to the representation effect alone. Additionally, self-reported data collected in the post-experimental survey displays that representatives do feel accountable for the represented group mates and, therefore, are willing to equally share their payoff. Finally, for future studies, this research suggests the use of more efficient minimal group procedures to better understand the isolated representation effect and the use of actual behaviors to investigate the mechanisms that lie at the basis of the representative role
La tranquillita' percepita come indicatore per individuare le aree quiete in ambito urbano di cui alla direttiva europea 49/2002/CE
The Tightly Regulated and Compartmentalised Import, Sorting and Folding of Mitochondrial Proteins
Mitochondria are eukaryotic intracellular organelles that still bear the signatures of their prokaryotic ancestor
and require nuclear assistance. They generously dispense energy to cells, but are also involved in several biosynthetic
processes, as well as in cell signalling pathways and programmed cell death.
Mitochondria are partitioned into four intra-organelle compartments: the outer membrane, the inner membrane, the
intermembrane space and the matrix. Each compartment contains a unique set of proteins and a personalised system for
guaranteeing protein homeostasis.
What follows is a survey of the function and topology of the multiple systems that operate the concerted action of protein
sorting and folding in the four mitochondrial compartments
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