Penelope Watkins

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-The architecture of the ATLAS Level-1 Calorimeter Trigger system (L1Calo) is presented. Common approaches have been adopted for data distribution, result merging, readout, and slow control across the three different subsystems. A significant amount of common hardware i s utilized, yielding substantial savings in cost, spares, and development effort. A(More)
The measurement of small–angle Bhabha scattering is used to determine the luminosity at the OPAL interaction point for the LEP I data recorded between 1993 and 1995. The measurement is based on the OPAL Silicon-Tungsten Luminometer which is composed of two calorimeters encircling the LEP beam pipe, on opposite sides of the interaction point. The luminometer(More)
QCD coherence effects are studied based on measurements of correlations of particles with either restricted transverse momenta, pT < p cut T , where pT is defined with respect to the thrust axis, or restricted absolute momenta, p ≡ |p| < p , using about four million hadronic Z decays recorded at LEP with the OPAL detector. The correlations are analyzed in(More)
Current interactive media presentations of textiles provide an impoverished communication of their 'textile hand', that is their weight, drape, how they feel to touch. These are complex properties experienced through the visual, tactile, auditory and proprioceptive senses and are currently lost when textile materials are presented in interactive video. This(More)
Handling textiles is not only a semantic experience, but also an emotional one. Whilst handling a textile is crucial for its appreciation and understanding, this channel is still little explored in the digital realm, where focus has been given to the haptic feedback aspect of handling. In this paper, we discuss the importance of touch behaviour in(More)
Searches for a scalar top quark and a scalar bottom quark have been performed using a data sample of 438 pb at centre-of-mass energies of √ s =192 – 209 GeV collected with the OPAL detector at LEP. No evidence for a signal was found. The 95% confidence level lower limit on the scalar top quark mass is 97.6 GeV if the mixing angle between the supersymmetric(More)
We describe the design of a digital calorimeter trigger processor system which could form a major part of the ATLAS level-1 trigger system. Utilising novel techniques, but with today’s technologies, the system can be contained within six electronics crates and will provide the central trigger logic with signals from events with high-pT electrons, photons,(More)
Searches for unstable neutral and charged heavy leptons, N and L±, and for excited states of neutral and charged leptons, ν∗, e∗, μ∗, and τ∗, have been performed in e+e− collisions using data collected by the OPAL detector at LEP. The data analysed correspond to an integrated luminosity of about 58 pb−1 at a centre-of-mass energy of 183 GeV, and about 10(More)
Tactile experiences of textile materials are difficult to communicate and elicit. To interrogate this space we propose the tactile triangle, a framework to facilitate systematic analysis and comparison of tactile experiences. The three levels reflect different aspects of tactile experience and possible methods to capture them: physical properties, in which(More)
G. ARNISON a, C. ALBAJAR b, M.G. ALBROW a, O.C. ALLKOFER c, A. ASTBURY d, B. AUBERT c, T. AXON r, C. BACCI g, T. BACON f, J.R. BATLEY h, G. BAUER i, J. BELLINGER J, A. BETTINI k, A. BI~ZAGUET b, R.K. BOCK °, K. BOS l, E. BUCKLEY h, G. BUSETTO k, P. CATZ e, P. CENNINI b, S. CENTRO k, F. CERADINI g, G. CIAPETTI g, S. CITTOLIN °, D. CLARKE h, D. CLINE j, C.(More)