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Multijet cross sections in charged current e±p scattering at HERA

Physical Review D 2008年第3期78卷 032004-032004页

作者： S. Chekanov M. Derrick S. Magill B. Musgrave D. Nicholass J. Repond R. Yoshida M. C. K. Mattingly M. Jechow N. Pavel P. Antonioli G. Bari L. Bellagamba D. Boscherini A. Bruni G. Bruni F. Cindolo M. Corradi G. Iacobucci A. Margotti R. Nania A. Polini S. Antonelli M. Basile M. Bindi L. Cifarelli A. Contin S. De Pasquale G. Sartorelli A. Zichichi D. Bartsch I. Brock H. Hartmann E. Hilger H.-P. Jakob M. Jüngst A. E. Nuncio-Quiroz E. Paul R. Renner U. Samson V. Schönberg R. Shehzadi M. Wlasenko N. H. Brook G. P. Heath J. D. Morris M. Capua S. Fazio A. Mastroberardino M. Schioppa G. Susinno E. Tassi J. Y. Kim Z. A. Ibrahim B. Kamaluddin W. A. T. Wan Abdullah Y. Ning Z. Ren F. Sciulli J. Chwastowski A. Eskreys J. Figiel A. Galas M. Gil K. Olkiewicz P. Stopa L. Zawiejski L. Adamczyk T. Bołd I. Grabowska-Bołd D. Kisielewska J. Łukasik M. Przybycień L. Suszycki A. Kotański W. Słomiński U. Behrens C. Blohm A. Bonato K. Borras R. Ciesielski N. Coppola V. Drugakov S. Fang J. Fourletova A. Geiser P. Göttlicher J. Grebenyuk I. Gregor T. Haas W. Hain A. Hüttmann F. Januschek B. Kahle I. I. Katkov U. Klein U. Kötz H. Kowalski E. Lobodzinska B. Löhr R. Mankel I.-A. Melzer-Pellmann S. Miglioranzi A. Montanari T. Namsoo D. Notz A. Parenti L. Rinaldi P. Roloff I. Rubinsky R. Santamarta U. Schneekloth A. Spiridonov D. Szuba J. Szuba T. Theedt G. Wolf K. Wrona A. G. Yagües Molina C. Youngman W. Zeuner W. Lohmann S. Schlenstedt G. Barbagli E. Gallo P. G. Pelfer A. Bamberger D. Dobur F. Karstens N. N. Vlasov P. J. Bussey A. T. Doyle W. Dunne M. Forrest M. Rosin D. H. Saxon I. O. Skillicorn I. Gialas K. Papageorgiu U. Holm R. Klanner E. Lohrmann P. Schleper T. Schörner-Sadenius J. Sztuk H. Stadie M. Turcato C. Foudas C. Fry K. R. Long A. D. Tapper T. Matsumoto K. Nagano K. Tokushuku S. Yamada Y. Yamazaki A. N. Barakbaev E. G. Boos N. S. Pokrovskiy B. O. Zhautykov V. Aushev M. Borodin A. Kozulia M. Lisovyi D. Son J. de Favereau K. Piotrzkowski F. Barreiro C. Glasman M. Jimenez L. Labarga J. del Peso E. Ron M. Soares J. Terrón M. Zambrana F Argonne National Laboratory Argonne Illinois 60439-4815 USA Andrews University Berrien Springs Michigan 49104-0380 USA Institut für Physik der Humboldt-Universität zu Berlin Berlin Germany INFN Bologna Bologna Italy University and INFN Bologna Bologna Italy Physikalisches Institut der Universität Bonn Bonn Germany H. H. Wills Physics Laboratory University of Bristol Bristol United Kingdom Calabria University Physics Department and INFN Cosenza Italy Chonnam National University Kwangju Republic of Korea Jabatan Fizik Universiti Malaya 50603 Kuala Lumpur Malaysia Nevis Laboratories Columbia University Irvington on Hudson New York 10027 USA The Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences Cracow Poland Faculty of Physics and Applied Computer Science AGH-University of Science and Technology Cracow Poland Department of Physics Jagellonian University Cracow Poland Deutsches Elektronen-Synchrotron DESY Hamburg Germany Deutsches Elektronen-Synchrotron DESY Zeuthen Germany INFN Florence Florence Italy University and INFN Florence Florence Italy Fakultät für Physik der Universität Freiburg i.Br. Freiburg i.Br. Germany Department of Physics and Astronomy University of Glasgow Glasgow United Kingdom Department of Engineering in Management and Finance University of Aegean Greece Hamburg University Institute of Experimental Physics Hamburg Germany Imperial College London High Energy Nuclear Physics Group London United Kingdom Institute of Particle and Nuclear Studies KEK Tsukuba Japan Institute of Physics and Technology of Ministry of Education and Science of Kazhakhstan Almaty Kazhakhstan Institute for Nuclear Research National Academy of Sciences Kiev and Kiev National University Kiev Ukraine Kyungpook National University Center for High Energy Physics Daegu Republic of Korea Institut de Physique Nucléaire Université Catholique de Louvain Louvain-la-Neuve Belgium Departamento de Física Teórica Universidad Autónoma de

Jet cross sections were measured in charged-current deep inelastic e±p scattering at high boson virtualities Q2 with the ZEUS detector at HERA II using an integrated luminosity of 0.36 fb−1. Differential cross sections are presented for inclusive-jet production as functions of Q2, Bjorken x and the jet transverse energy and pseudorapidity. The dijet invariant mass cross section is also presented. Observation of three- and four-jet events in charged-current e±p processes is reported for the first time. The predictions of next-to-leading-order (NLO) QCD calculations are compared to the measurements. The measured inclusive-jet cross sections are well described in shape and normalization by the NLO predictions. The data have the potential to constrain the u and d valence-quark distributions in the proton if included as input to global fits.

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Influence of Ni on the thermoelectric properties of the partially filled calcium skutterudites CayCo4−xNixSb12

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Physical Review B 2007年第24期75卷 245110-245110页

作者： M. Puyet A. Dauscher B. Lenoir C. Bellouard C. Stiewe E. Müller J. Hejtmanek J. Tobola Faculty of Physics and Applied Computer Science AGH University of Science and Technology 30-059 Krakow Poland

We have synthesized and studied the structural and thermoelectric properties of Ni-substituted partially filled CayCo4−xNixSb12 (y∼0.10 and 0.18; 0<x<0.10) skutterudites. Electrical and thermal properties have ...

We have synthesized and studied the structural and thermoelectric properties of Ni-substituted partially filled CayCo4−xNixSb12 (y∼0.10 and 0.18; 0

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M55n nuclear magnetic resonance study of highly Sr-doped La2−2xSr1+2xMn2O7 (x=0.5–0.8)

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Physical Review B 2008年第18期78卷 184428-184428页

作者： D. Rybicki Cz. Kapusta W. Tokarz H. Štěpánková V. Procházka J. Haase Z. Jirák D. T. Adroja J. F. Mitchell Department of Solid State Physics Faculty of Physics and Applied Computer Sciences AGH-University of Science and Technology Al. Mickiewicza 30 30-059 Krakow Poland Faculty of Physics and Earth Science Leipzig University Linnéstraße 5 04103 Leipzig Germany Department of Low Temperature Physics Faculty of Mathematics and Physics Charles University in Prague V. Holešovičkách 2 180 00 Prague 8 Czech Republic Institute of Physics Cukrovarnická 10 162 53 Prague 6 Czech Republic ISIS Facility Rutherford Appleton Laboratory Chilton Didcot OX11 0QX United Kingdom Center for Nanoscale Materials Materials Science Division Argonne National Laboratory 9700 South Cass Avenue Argonne Illinois 60439 USA

The M55n nuclear magnetic resonance (NMR) study of bilayered perovskites La2−2xSr1+2xMn2O7 with 0.5≤x≤1 is presented. The M55n spin-echo spectra were measured at 4.2 K at zero applied magnetic field and at fields up to 2.5 T. Recent neutron-diffraction studies report that all the compounds studied are antiferromagnetically ordered (except x=0.68 in which no long-range magnetic order was found) [Mitchell et al., J. Phys. Chem. B 105, 10731 (2001)]. However, within the doping range 0.62≤x≤0.68, apart from NMR signal from antiferromagnetic insulating (AFI) phase, also lines from ferromagnetic insulating (FMI) and ferromagnetic metallic (FMM) phases are observed. This indicates that phase separation occurs in high Sr-doped bilayered manganites. The amount of the FMI and FMM regions decreases with the Sr doping level and for compounds with x=0.75 and x=0.8; only the line originating from nuclei in Mn4+ cations in AFI regions is observed.

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Consideration of security in telehealth wireless sensor network monitoring systems

Consideration of security in telehealth wireless sensor netw...

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3rd IASTED International Conference on Telehealth, Telehealth 2007

作者： Adams, Jocelyn Eklund, J. Mikael Roosta, Tanya Bajcsy, Ruzena Sastry, Shankar Department of Engineering Physics Brown University Faculty of Engineering and Applied Science University of Ontario Institute of Technology Department of Electrical Engineering and Computer Sciences University of California Berkeley CA United States

ISBN: (纸本)9780889866676

Wireless sensor networks (WSNs) provide the potential for effective and cost efficient remote and ubiquitous health care monitoring as they are easy to install, robust and secure. By their nature, these WSNs use asynchronous communications to reduce transmission power and improve efficiency. However this form of communication creates potential issues with the synchronization of the data received and stored by the telehealth system that they provide data to. This problem can be exacerbated if multiple sensors are employed, which is very likely due to the relatively low cost of such devices as well as the intended applications of these WSNs. Time synchronization is one essential component to maintain in the security of data transmission through wireless sensor networks (WSN). Each individual node in a WSN contains a crystal clock. Although the natural frequency of each crystal clock remains relatively constant, the quality of the crystal and environmental factors such as temperature cause the frequency to drift over time. In order to ensure that each node maintains and broadcasts the same global time within the micro-second range, a time synchronization protocol must be implemented. Several protocols have been developed;however, none has been developed with security in mind. It is easy for a system error or even a malicious third party to compromise a node, causing faulty time sync messages to be sent into the network. The Flooding Time Synchronization Protocol (FTSP) [5] is proposed to ensure time sychrony in the telehealh WSN. The FTSP is made up of several component modules written in nesC and has been implemented in the TinyOS [1] environment. TinyOS is an open source operating system developed specifically for network systems. In order to investigate the effects of injecting bad time synchronization messages into a WSN implemented with the FTSP, one or two nodes in a testbed of Telos motes (a mote being a remote wireless sensor) have been programmed to send fault

关键词： Assisted living

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VPN based data acquisition system for KASKA prototype detector

VPN based data acquisition system for KASKA prototype detect...

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2007 15th IEEE-NPSS Real-Time Conference, RT

作者： Sakamoto, Y. Furuta, H. Tabata, H. Suekane, F. Nagasaka, Y. Department of Information Science Faculty of Liberal Arts Tohoku Gakuin University Tenjinsawa 2-1-1 Izumiku Sendai 981-3193 Japan Department of Physics Graduate School of Science and Engineering Tokyo Institute of Technology Department of Physics Graduate School of Science Tohoku University Research Center for Neutrino Science Tohoku University Department of Computer Science Faculty of Applied Information Science Hiroshima Institute of Technology

ISBN: (纸本)1424408679

KASKA is a Japanese neutrino oscillation experiment to measure the neutrino mixing angle 813 by using reactor neutrinos. This collaboration had conducted studies for the actual experiment till recently, march of 2007. As one of the studies, a prototype detector had been constructed and that is used for various studies. As almost of the prototype studies have been finished, we decided to do a trial to detect actual neutrino events at the experimental fast reactor JOYO by using the prototype detector. To detect a neutrino event from a fast reactor is experimental attempt. This paper describes briefly a present status of the experiment in focusing to the outline of DAQ, monitoring system and controlling system used there. © 2007 IEEE.

关键词： Fast reactors

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Measurements of matching and high count rate performance of multichannel ASIC for digital X-ray imaging systems

Measurements of matching and high count rate performance of ...

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作者： Grybos, Pawel Maj, Piotr Ramello, Luciano Swientek, Krzysztof IEEE Faculty of Electrical Engineering Automatics Computer Science and Electronics Department of Measurement and Instrumentation AGH University of Science and Technology 30-059 Cracow Poland Dipartamento di Scienze e Tecnologie Avanzate Universita del Piemonte Orientale INFN 15100 Alessandria Italy Faculty of Physics and Applied Computer Science AGH University of Science and Technology 30-059 Cracow Poland

We present the measurements of matching and high count rate performance of a 64 channel readout ASIC called DEDIX for high count rate position-sensitive measurements using semiconductor detectors. The ASIC is designed in 0.35 μm CMOS process and its total area is 3900 × 5000 μm2. The DEDIX has a binary readout architecture. Each channel is built of a charge sensitive amplifier (CSA) with a pole-zero cancellation circuit, a shaper, two independent discriminators and two independent 20-bit counters. The size of the input device in CSA has been optimized for a detector capacitance in the range of 1-3 pF per strip. An equivalent noise charge of 110 el rms has been achieved for a total detector capacitance of 1 pF at the shaper peaking time of 160 ns. Internal correction DAC implemented in each channel independently ensures a low spread of discriminator effective threshold, namely 0.4 mV at one sigma level. The mean gain in the multichannel ASIC is 54 μV/el, with a good uniformity from channel-to-channel (sd/mean 0.8%). Low noise performance and high rate capability have been demonstrated by the measurement up to and above 1 MHz average rate of input signals. © 2007 IEEE.

关键词： Image matching

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Saturation processes in principal channel of dye solutions with coincident absorption and emission bands-Part II

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Journal of applied sciences 2007年第22期7卷 3588-3591页

作者： Addasi, Jihad S.M. Jadan, Mohanad Abushendi, Saleh A. Department of Applied Physics Faculty of Science Tafila Technical University Tafila Jordan Department of Mathematics and Computer Science Faculty of Science Tafila Technical University Tafila Jordan

A phase response of dye solution and saturation processes can be taken into consideration to describe a nonlinear medium. Nonlinear medium can be modeled by a typical three-level configuration (S0-S1-S2), for which the transition of molecules in principal channel (S0-S1) are occurred by the light fields of intensity I12 at frequency w0. At the same time, light fields with intensity I23 at frequency w interact with excited molecules to form their transitions in excited channel (S1-S2). The phase response of dye solution in principal channel (S0-S1) reaches saturation at intensity I12sat. At this point, the saturation intensity decreases with increasing radiation intensity in the excited channel I23. The saturation intensity I12sat has its optimum (minimum) values when the frequency of light fields in principal channel is tuned into the centre of principal absorption band. In addition, the saturation intensity I12sat has its optimum value when the radiations in excited channel have enough high intensity I23 and a frequency tuning into the centre of absorption excited band. © 2007 Asian Network for Scientific Information.

关键词： Nonlinear systems

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Electron correlations in charge coupled vertically stacked quantum rings

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Physical Review B 2007年第23期75卷 235323-235323页

作者： B. Szafran S. Bednarek M. Dudziak Faculty of Physics and Applied Computer Science AGH University of Science and Technology Aleja Mickiewicza 30 30-059 Kraków Poland

We study spatial correlations for two electrostatically coupled electrons in a pair of vertically stacked quantum rings with configuration-interaction approach. We demonstrate that for distant quantum rings, the correlations undergo abrupt oscillations with the external magnetic field, which are strong for odd multiples of the flux quantum for which the electrons distinctly avoid being localized one above the other and are negligible for other values of the flux. The oscillations of the correlation strength vanish in the single-ring limit for which the electrons form a Wigner molecule. The wave function of the Hartree approximation is frustrated between reproducing the exact angular momentum eigenstate or the correlation between the electrons. We show that for distant rings the mean-field solution breaks the rotational symmetry of the system in a reentrant manner near odd multiples of half of the flux quantum to account for the correlation appearing in the exact solution.

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Perturbation based local search for the degree-constrained minimum spanning-tree problem

Perturbation based local search for the degree-constrained m...

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3rd Indian International Conference on Artificial Intelligence, IICAI 2007

作者： Singh, Alok Gupta, Ashok Kumar Department of Computer and Information Sciences University of Hyderabad Hyderabad - 500046 Andhra Pradesh India J. K. Institute of Applied Physics and Technology Faculty of Science University of Allahabad Allahabad - 211002 UP India

ISBN: (纸本)9780972741224

Given a connected, weighted, and undirected graph, the degreeconstrained minimum spanning-tree problem seeks on this graph a spanningtree of minimum weight subject to a limit on the number of edges that can be incident to each node. In this paper we have proposed a perturbation based local search for this problem. Tests on standard benchmark instances for the problem demonstrate the effectiveness of our approach. Copyright © 2007 IICAI.

关键词： Constrained optimization

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computer animation in creative design

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Machine Graphics and Vision 2007年第1-2期16卷 85-104页

作者： Ślusarczyk, Grazyna Jagiellonian University Faculty of Physics Astronomy and Applied Computer Science Reymonta 4 30-059 Kraków Poland

The paper proposes a new approach to graphic design with the use of computer animation. The class of designs considered are periodic patterns. First, the characterization of rosettes, borders and periodic planar designs is given. Then, a generative system which produces a great variety of periodic designs is equipped with animation. As in-between animation frames ensure the continuity and fluidity of pattern movement, a dynamic continuous design space is obtained. The changes in pattern symmetry groups which result from the use of animation are described. The role of animation in supporting perception of the emergent shapes in the generated patterns is also mentioned. The paper is illustrated by periodic designs produced by the DARTAN animated generative system.

关键词： Animation

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