4,830 research outputs found
R-Hadron and long lived particle searches at the LHC
If long lived charged particles exist, and produced at the LHC, they may
travel with velocity significantly slower than the speed of light. This unique
signature was not considered during the design of the LHC experiments, ATLAS
and CMS. As a result, hardware and trigger capabilities need to be evaluated.
Model independent approaches for finding long lived particles with the LHC
experiments are introduced. They are tested using two bench marks, one in GMSB
and one in Split SUSY. The focus is on hardware and trigger issues, as well as
reconstruction methods developed by ATLAS and CMS. Both experiments suggest
time of flight (TOF) based methods. However, the implementation is different.
In ATLAS a first beta estimation is done already at the trigger level. CMS also
uses dE/dx to estimate beta.Comment: Submitted for the SUSY07 proceedings, 4 pages, LaTeX, 7 eps figure
The Thin Gap Chambers database experience in test beam and preparations for ATLAS
Thin gap chambers (TGCs) are used for the muon trigger system in the forward
region of the LHC experiment ATLAS. The TGCs are expected to provide a trigger
signal within 25 ns of the bunch spacing. An extensive system test of the ATLAS
muon spectrometer has been performed in the H8 beam line at the CERN SPS during
the last few years. A relational database was used for storing the conditions
of the tests as well as the configuration of the system. This database has
provided the detector control system with the information needed for
configuration of the front end electronics. The database is used to assist the
online operation and maintenance. The same database is used to store the non
event condition and configuration parameters needed later for the offline
reconstruction software. A larger scale of the database has been produced to
support the whole TGC system. It integrates all the production, QA tests and
assembly information. A 1/12th model of the whole TGC system is currently in
use for testing the performance of this database in configuring and tracking
the condition of the system. A prototype of the database was first implemented
during the H8 test beams. This paper describes the database structure, its
interface to other systems and its operational performance.Comment: Proceedings IEEE, Nuclear Science Symposium 2005, Stockholm, Sweeden,
May 200
VICAR-DIGITAL image processing system
Computer program corrects various photometic, geometric and frequency response distortions in pictures. The program converts pictures to a number of elements, with each elements optical density quantized to a numerical value. The translated picture is recorded on magnetic tape in digital form for subsequent processing and enhancement by computer
From Fraudsters to Scammers and Cyber-Villains, Tech-Savvy Criminals Are Out to Steal Your Money
Today, more than ever before, criminals are out to steal from your business. However, today, criminals not only use organized shoplifting gangs and engage in armed robberies, but they now also use computers and the internet. Bernie Madoff and Sam Bankman-Fried have joined the lengthy list of well-known criminals before Charles Ponzi.
The Fraud Triangle (Cressey, 1973) is based upon Opportunity, Incentive, and Rationalization. The COVID-19 pandemic created a perfect storm of opportunity for would-be scammers. The federal government fueled opportunity with 400 billion for COVID unemployment relief.
According to the Association of Certified Fraud Examiners (ACFE) small businesses are often targeted as they tend to have fewer safeguards in place to prevent fraud. The ACFE reports that the average loss for a small business fraud is $100,000 and an average of five percent of annual revenue.
In this paper, the authors provide an overview of current fraud activities and a study of the Traits of Sympathy survey to help examine whether a relationship exists between one’s rationalization and sympathy in their decision to commit fraud in the pre-fraud state. We present research findings and offer recommendations
Trigger and Reconstruction for a heavy long lived charged particles with the ATLAS detector
Long lived charged particles are predicted by many models of physics beyond the standard model (SM). The common signature of such models is a heavy long-lived charged particle with velocity smaller than the speed of light, beta<1. This unique signature makes the search for it model independent. This paper presents methods developed as part of the ATLAS trigger and reconstruction chain for identifying slow particles and measuring their mass. The efficacy of these methods is demonstrated using two models that are different in every aspect except for the existence of long lived charged particles; A GMSB model that includes sleptons with a mass of 100 GeV, and R-Hadrons with a mass of 300 GeV produced in a split SUSY model
In Search of Humble Leaders
The significance of moderation and balance across various domains has been sanctioned for millennia and deviations from midpoints of virtues, traits, qualities, and other attributes have been described as dysfunctional suggesting a nonmonotonic, U-shaped curve. Modern scholarship and lay interpretations of the virtue of humility have neglected this perspective and appear to tacitly assume that humility is an unmitigated good that leaders should develop and that more is better. Here we show, however, that what we refer to as authentic humility, is positioned at an intermediate point between negative and positive views of the self and that deviations from this center adversely impact well-being and offer a nonlinear, inverted U-shaped curve. Such an interpretation reconciles views of humility as a weakness or strength and demonstrates its positive impact on self, followers, and organizational well-being. We conclude by suggesting that humility has costs for leaders and therefore not an unmitigated good. 
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