Towards ballistic heat transport in the S=1/2 Heisenberg chain compound SrCuO2 (2009)
Hlubek, N., Ribeiro, P., Saint-Martin, R., Revcolevschi, A., Roth, G., Behr, G., ...
We investigate the magnetic heat conductivity $\kappa_{mag}$ of the antiferromagnetic S=1/2 Heisenberg chain cuprate SrCuO2 for samples with standard as well as high chemical purity. A huge...
The CMS barrel calorimeter response to particle beams from 2 to 350 GeV/c (2009)
Abdullin, S., Abramov, V., Acharya, B., Adam, N., Adams, M., Adzic, P., ...
The CMS barrel calorimeter response to particle beams from 2 to 350 GeV/c (2009)
Abdullin, S., Abramov, V., Acharya, B., Adam, N., Adams, M., Adzic, P., ...
The response of the CMS barrel calorimeter (electromagnetic plus hadronic) to hadrons, electrons and muons over a wide momentum range from 2 to 350 GeV/c has been measured. To our knowledge, this is...
Intercalibration of the barrel electromagnetic calorimeter of the CMS experiment at start-up (2008)
Adzic, P., Alemany-Fernandez, R., Almeida, N., Anagnostou, G., Andelin, D., Anfreville, M., ...
Calibration of the relative response of the individual channels of the barrel electromagnetic calorimeter of the CMS detector was accomplished, before installation, with cosmic ray muons and test...
Intercalibration of the barrel electromagnetic calorimeter of the CMS experiment at start-up (2008)
Adzic, P, Alemany-Fernandez, R, Almeida, N, Anagnostou, G, Andelin, D, Anfreville, M, ...
Calibration of the relative response of the individual channels of the barrel electromagnetic calorimeter of the CMS detector was accomplished before installation with cosmic ray muons and test...
Ribeiro, P., Vidal, J., Mosseri, R.
The spectrum of the Lipkin-Meshkov-Glick model is exactly derived in the thermodynamic limit by means of a spin coherent states formalism. In the first step, a classical analysis allows one to...
Brooijmans, G, Delgado, A, Dobrescu, B A, Grojean, Christophe, Narain, M, Alwall, J, ...
We present a collection of signatures for physics beyond the standard model that need to be explored at the LHC. The signatures are organized according to the experimental objects that appear in the...
Brooijmans, G., Delgado, A., Dobrescu, B. A., Grojean, C., Narain, M., Alwall, J., ...
We present a collection of signatures for physics beyond the standard model that need to be explored at the LHC. The signatures are organized according to the experimental objects that appear in the...
G. Brooijmans, A. Delgado, B.A. Dobrescu, C. Grojean, M. Narain, ...
Internal report | Preprint
Study of the electron trigger efficiency of the CMS Experiment using test beam data (2007)
Ribeiro, P, Gallinaro, M, Varela, J
A study of the electron identification and selection efficiency of the L1 Trigger algorithm has been performed using the combined ECAL/HCAL test beam data. A detailed discussion of the electron...
The Thermodynamical Limit of the Lipkin-Meshkov-Glick Model (2007)
Ribeiro, P., Vidal, J., Mosseri, R.
A method based on the analyzis of the Majorana polynomial roots is introduced to compute the spectrum of the Lipkin-Meshkov-Glick model in the thermodynamical limit. A rich structure made of four...
One- and Two-Triplon Spectra of a Cuprate Ladder (2007)
Notbohm, S, Ribeiro, P, Tennant, DA, Schmidt, KP, Uhrig, GS, Hess, C, ...
Experimental studies of marine diversity and ecology (2007)
Hawkins, S., Masterson, P., De Souza, R.A., Tyler, P., Filho, G.G., Pike, J., ...
Magnetization of undoped 2-leg S = 1/2 spin ladders in La4Sr10Cu24O41 (2006)
Klingeler, R., Hellmann, I., Ribeiro, P., Hess, C., Buechner, B.
Magnetization data of single crystalline La4Sr10Cu24O41 are presented. In this compound, doped spin chains and undoped spin ladders are realized. The magnetization, at low temperatures, is governed...
N. Mateus, P. Ribeiro, V. De Freitas, S. Proença, J. M. Machado
Grape and wine polyphenolic composition of red vitis vinifera varieties concerning vineyard altitude
One- and Two-Triplon Spectra of a Cuprate Ladder (2006)
Notbohm, S., Ribeiro, P., Lake, B., Tennant, D. A., Schmidt, K. P., Uhrig, G. S., ...
We have performed inelastic neutron scattering on the near ideal spin-ladder compound La4Sr10Cu24O41, which will serve as a model system for the investigation of doped ladders. A key feature in the...
Adiabatic Computation - A Toy Model (2006)
We discuss a toy model for adiabatic quantum computation which displays some phenomenological properties expected in more realistic implementations. This model has two free parameters: the adiabatic...
Koitzsch, A., Borisenko, S. V., Geck, J., Zabolotnyy, V. B., Knupfer, M., Fink, J., ...
We have investigated the low-energy electronic structure of the strongly correlated one-dimensional copper oxide chain compound SrCuO2 by angle resolved photoemission as a function of excitation...
Deslandes,A.C., Veiga,H., Cagy,M., Piedade,R., Pompeu,F., Ribeiro,P.
Caffeine is the most consumed psychoactive substance in the world. The effects of caffeine have been studied using cognitive and motor measures, quantitative electroencephalography (qEEG) and...
Hess, C., Ribeiro, P., Büchner, B., ElHaes, H., Roth, G., Ammerahl, U., ...
The magnon thermal conductivity $\kappa_{\mathrm{mag}}$ of the spin ladders in $\rm Sr_{14}Cu_{24-x}Zn_xO_{41}$ has been investigated at low doping levels $x=0$, 0.125, 0.25, 0.5 and 0.75. The...
Comparison of Target Detection Algorithms Using Adaptive Background Models (2005)
Hall Nascimento Ribeiro, D. Hall, J. Nascimento, P. Ribeiro, E. Andrade, P. Moreno, ...
This article compares the performance of target detectors based on adaptive background differencing on public benchmark data. Five state of the art methods are described. The performance is evaluated...
Submitted to VS-PETS, October 2005 (2005)
Comparison Of Target, D. Hall, J. Nascimento, P. Ribeiro, E. Andrade, P. Moreno, ...
This article compares the performance of target detectors based on adaptive background differencing algorithms on public benchmark data. Several state of the art methods are described together with...
Retrieving ClipArt Images by Content (2004)
Manuel J. Fonseca, B. Barroso, P. Ribeiro, Joaquim A. Jorge
Abstract. Nowadays there are a lot of vector drawings available for inclusion into documents, which tend to be achieved and accessed by categories. However, to find a drawing among hundreds of...
Freitas , V. De, Machado , J. M., Mateus , N., Proença , S., Ribeiro , P.
The effect of altitude and its related climatic conditions on the polyphenolic composition (procyanidin and anthocyanin compounds) of grapes and wines of Touriga Nacional and Touriga Francesa red...
Nonlinear free vibration of isotropic plates with internal resonance (2000)
The geometrically non-linear free vibration of thin isotropic plates is investigated using the hierarchical finite element method (HFEM). Von Kármán's non-linear strain–displacement relationships...
A Prototype ATM Network for Real Time Control of the LHC (1999)
Herr, Werner, Ribeiro, P, Wijnands, Thijs
The LHC accelerator aims at injecting, accelerating and colliding beams with very well controlled beam parameters (e.g. momentum, orbit, tune and chromaticity). This is a non-trivial task since the...
TOPOL, E, CALIFF, R, DIAZ, R, PAOLASSO, E, AYLWARD, P, ...
Bland, A, Charrue, P, Ghinet, F, Ribeiro, P, Rausch, R
A new generation of PowerPC VMEbus front-end computers is being introduced in the CERN accelerators and services control system infrastructure. This new technology is aimed at replacing existing PC...
RESEARCH ARTICLE &roles:John (1996)
J. Jeka, Gregor Schöner, Tjeerd Dijkstra, Pedro Ribeiro, James R. Lackner, J. J. Jeka, ...
Light touch contact of a fingertip with a stationary surface can provide orientation information that enhances control of upright stance. Slight changes in contact force at the fingertip provide...
Using SNMP for creating distributed diagnostic tools (1995)
Reisacher, O, Ribeiro, P, Christiansen, H P
In this paper we describe how SNMP (Simple Network Management Protocol) can be extended to do control system diagnostics. Our solution consists of a SNMP agent for LynxOS and a configurable MIB...
Charrue, P, Bland, A, Ghinet, F, Ribeiro, P
The CERN SPS and LEP PowerPC project is aimed at introducing a new generation of PowerPC VMEbus processor modules running the LynxOS real-time operating system. This new generation of front end...
New high level application software for the control of the SPS-LEP beam transfer lines (1995)
Chevrier, F L, Crockford, G, Hilaire, A, Maumary, Y, Niquille, C, Paris, V, ...
New high level application software is being developed for the control of the SPS and LEP Transfer Lines. This paper briefly describes the model for the operation of these Transfer Lines, which is...
Nodal: the second life of the accelerator control language (1993)
Cuisinier, G, Perriollat, F, Ribeiro, P, Kagarmanov, A, Kovaltsov, V I
Nodal is a popular interpreter language for accelerator controls since the beginning of the 70's. Nodal has been rewritten in the C language to be easily portable to the different computer platforms...
Pericarditis in infective endocarditis (1985)
RIBEIRO, P., SHAPIRO, L., NIHOYANNOPOULOS, P., GONZALEZ, A., OAKLEY, C M.
Three patients with infective endocarditis who presented with severe precordial pain and pericardial rubs are described in whom sterile pericardial and pleural effusions were found. The pericardial...
NIHOYANNOPOULOS, P., OAKLEY, C. M., EXADACTYLOS, N., RIBEIRO, P., WESTABY, S., FOALE, R. A.
One hundred and six patients were analysed in order to assess the effect of a more aggressive surgical policy in relation to the delays in diagnosis of infective endocarditis. The average duration of...
Left ventricular function in patients with ankylosing spondylitis and Reiter's disease (1984)
RIBEIRO, P., MORLEY, K.D., SHAPIRO, L.M., GARNETT, R.A.F., HUGHES, G.R.V., GOODWIN, J.F.
We have studied left ventricular function by non-invasive methods in 28 patients with ankylosing spondylitis and 14 with Reiter's disease and compared them with 42 normal subjects. A dilated and...
Regulation of recombinant rat tyrosine hydroxylase by dopamine.
Ribeiro, P, Wang, Y, Citron, B A, Kaufman, S
Recombinant rat PC12 tyrosine hydroxylase, also called tyrosine 3-monooxygenase [L-tyrosine, tetrahydropteridine:oxygen oxidoreductase (3-hydroxylating), EC 1.14.16.2], purified from Escherichia coli...
Davis, M D, Ribeiro, P, Tipper, J, Kaufman, S
The ability of 2-amino-4-hydroxy-7-[dihydroxylpropyl-(L-erythro)-5,6,7,8-tetrahyd ropterin] ("7-tetrahydrobiopterin" or 7-BH4) to substitute for the natural cofactor tetrahydrobiopterin (BH4) has...
Wang, Y H, Citron, B A, Ribeiro, P, Kaufman, S
A rat cDNA containing the complete coding sequence for rat tyrosine hydroxylase (tyrosine 3-monooxygenase, EC 1.14.16.2) was isolated from a rat PC12 cDNA library and subcloned in a bacterial...
Regulation of recombinant rat tyrosine hydroxylase by dopamine.
Ribeiro, P, Wang, Y, Citron, B A, Kaufman, S
Recombinant rat PC12 tyrosine hydroxylase, also called tyrosine 3-monooxygenase [L-tyrosine, tetrahydropteridine:oxygen oxidoreductase (3-hydroxylating), EC 1.14.16.2], purified from Escherichia coli...
Davis, M D, Ribeiro, P, Tipper, J, Kaufman, S
The ability of 2-amino-4-hydroxy-7-[dihydroxylpropyl-(L-erythro)-5,6,7,8-tetrahyd ropterin] ("7-tetrahydrobiopterin" or 7-BH4) to substitute for the natural cofactor tetrahydrobiopterin (BH4) has...
Wang, Y H, Citron, B A, Ribeiro, P, Kaufman, S
A rat cDNA containing the complete coding sequence for rat tyrosine hydroxylase (tyrosine 3-monooxygenase, EC 1.14.16.2) was isolated from a rat PC12 cDNA library and subcloned in a bacterial...
Ribeiro, P, Shapiro, L M, Gonzalez, A, Thompson, G R, Oakley, C M
Aortic root abnormalities (atherosclerotic thickening and obstruction) seen at necropsy may readily be detected by aortography in familial hypercholesterolaemia. We studied 35 patients with familial...
Constrictive pericarditis as a complication of coronary artery bypass surgery.
Ribeiro, P, Sapsford, R, Evans, T, Parcharidis, G, Oakley, C
Although it is now recognised as a rare complication of cardiac surgery, constrictive pericarditis was diagnosed in three patients after coronary artery bypass surgery. The time interval between...
Ribeiro, P, Shea, M, Deanfield, J E, Oakley, C M, Sapsford, R, Jones, T, ...
To determine the physiological effect of coronary artery bypass surgery and the mechanisms for pain relief, 15 patients with exertional angina were studied before and after operation. Before the...
Ribeiro, P, Nihoyannopoulos, P, Farah, S, Moss, D W, Westaby, S, Oakley, C M, ...
To evaluate the role of ischaemia in the genesis of new septal wall motion abnormalities after coronary artery bypass surgery 45 patients were studied by cross sectional echocardiography before and...
Management of aortic left ventricular tunnel.
Ribeiro, P, Bun-Tan, L B, Oakley, C M
A 22 year old man had a diagnosis of left ventricular aortic tunnel established during infancy. Surgical repair was deferred at that time because his severe aortic root deformity would also have...
Percutaneous balloon valvotomy in tricuspid stenosis.
Al Zaibag, M, Ribeiro, P, Al Kasab, S
This report describes the first successful treatment of tricuspid stenosis by percutaneous double balloon valvotomy. There was a dramatic reduction of the tricuspid valve gradient, with an increase...
Use of a double balloon technique for percutaneous balloon pulmonary valvotomy in adults.
Al Kasab, S, Ribeiro, P, Al Zaibag, M
Percutaneous double balloon pulmonary valvotomy was performed on seven consecutive adult patients (mean age 26 years) with congenital pulmonary valve stenosis. The peak systolic transvalvar pressure...
Foale, R A, Nihoyannopoulos, P, Ribeiro, P, McKenna, W J, Oakley, C M, Krikler, D M, ...
Patients with right ventricular tachycardia may have adverse electrophysiological abnormalities linked to disturbed right ventricular structure. Seventeen patients who presented with right...
The interaction of cigarette smoking and β-adrenoceptor blockade
Fox, K., Deanfield, J., Krikler, S., Ribeiro, P., Wright, C.
The importance of the interaction between smoking and propranolol (metabolised in the liver) and atenolol (excreted almost entirely in the urine) was investigated in a double-blind placebo-controlled...
Warzocha, K., Bienvenu, J., Ribeiro, P., Moullet, I., Dumontet, C., Neidhardt-Berard, E. M., ...
A prospective study was performed to assess the use of plasma measurement of tumour necrosis factor (TNF), lymphotoxin alpha (LT alpha) and their soluble receptors (p55 and p75) for prognostic risk...