0000000001301515

AUTHOR

G. Garcia

showing 19 related works from this author

Development of a methodology for the detection of vertical split head defects in the rail

2011

rail inspection vertical split head laser ultrasound
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Spin asymmetriesA1of the proton and the deuteron in the lowxand lowQ2region from polarized high energy muon scattering

1999

We present the results of the spin asymmetries (Formula presented) of the proton and the deuteron in the kinematic region extending down to (Formula presented) and (Formula presented) The data were taken with a dedicated low x trigger, which required hadron detection in addition to the scattered muon, so as to reduce the background at low x. The results complement our previous measurements and the two sets are consistent in the overlap region. No significant spin effects are found in the newly explored region. © 1999 The American Physical Society.

PhysicsNuclear physicsNuclear and High Energy PhysicsHigh energyParticle physicsMuonDeuteriumProtonScatteringHadronDeep inelastic scatteringSpin-½Physical Review D
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laser-based ultrasonic rail flaw inspection prototype: system overview and status

2007

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Proof of concept of wayside railroad wheel inspection using a laser-air hybrid ultrasonic technique

2003

Non-destructive inspection of railroad wheels is performed in maintenance shops, where wheels are removed and inspected individually. No technique is yet available to the railroad industry to perform wayside inspections of wheels on a moving train. The characteristics of laser and air-coupled ultrasound are discussed to justify the use of a laser-air hybrid ultrasonic technique. Laser generation of ultrasound is combined with air-coupled detection to provide a flexible non-contact and remote technique that would enable the railroad industry to perform wayside inspections of moving railroad wheels. The present paper describes Proof of Concept set-up and results of the experiments performed a…

Engineeringbusiness.industryMechanical EngineeringAcousticsMetals and AlloysFlangeLaserSignalAutomotive engineeringlaw.inventionMechanics of MaterialsProof of conceptlawUltrasound Laser Ultrasound Air-Coupled Ultrasound Shattered Rim Crack Fatigue Crack.Materials ChemistryUltrasonic sensorRadio frequencyTime domainTreadbusinessInsight - Non-Destructive Testing and Condition Monitoring
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Dynamic railroad inspection using the laser-air hybrid ultrasonic technique

2006

Laser-Air Hybrid Ultrasonic Technique (LAHUT) combines laser generation with air-coupled detection of ultrasound. The technique is non-contact and has the characteristic of operating from remote distances. Acoustic wave laser-generation apparatus can be metres away from the interrogated surface while air-coupled detection standoff can be on the order of several centimetres. The technique has the unique capability of interrogating structural materials in their true industrial environment. Dynamic tests are performed on parts with complex geometry, limited accessibility and curved surfaces. Also, dark and rough finish surfaces, which significantly reduce the efficiency of optical detection te…

EngineeringUltrasonic imaging Dynamic railroad inspectionStructural materialbusiness.industryMechanical EngineeringAcousticsImaging techniqueMetals and AlloysBase (geometry)Remote sensingFlangeTransverse planeMechanics of MaterialsProof of conceptLaser applicationMaterials ChemistryForensic engineeringHead (vessel)RailroadUltrasonic sensorShattered Rim CrackTreadLaser-Air Hybrid Ultrasonic TechniquebusinessVertical split head
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Hadronic calibration of the ATLAS liquid argon end-cap calorimeter in the pseudorapidity region in beam tests

2004

Abstract A full azimuthal φ -wedge of the ATLAS liquid argon end-cap calorimeter has been exposed to beams of electrons, muons and pions in the energy range 6 GeV ⩽ E ⩽ 200 GeV at the CERN SPS. The angular region studied corresponds to the ATLAS impact position around the pseudorapidity interval 1.6 | η | 1.8 . The beam test setup is described. A detailed study of the performance is given as well as the related intercalibration constants obtained. Following the ATLAS hadronic calibration proposal, a first study of the hadron calibration using a weighting ansatz is presented. The results are compared to predictions from Monte Carlo simulations, based on GEANT 3 and GEANT 4 models.

GEANT-3PhysicsNuclear and High Energy PhysicsParticle physicsLarge Hadron ColliderPhysics::Instrumentation and Detectors010308 nuclear & particles physicsMonte Carlo methodHadron01 natural sciences7. Clean energyCalorimeterNuclear physicsmedicine.anatomical_structureAtlas (anatomy)Pseudorapidity0103 physical sciencesmedicineHigh Energy Physics::ExperimentNuclear Experiment010306 general physicsInstrumentationBeam (structure)Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
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Laser-air hybrid ultrasonic technique for dynamic railroad inspection applications

2005

The Laser-Air Hybrid Ultrasonic Technique (LAHUT) combines laser generation with air-coupled detection of ultrasound. The technique is non-contact and has the characteristic of operating from remote distances. Acoustic wave laser-generation apparatus can be metres away from the interrogated surface, while air-coupled detection stand-off can be on the order of several centimetres. The technique has the unique capability of interrogating structural materials in their true industrial environment. Dynamic tests are performed on parts with complex geometry, limited accessibility and curved surfaces. Also, dark and rough finish surfaces, which significantly reduce the efficiency of optical detect…

Engineeringbusiness.industryMechanical EngineeringAcousticsMaterials Science (miscellaneous)Metals and AlloysBase (geometry)FlangeTransverse planeMechanics of MaterialsProof of conceptRail inspectionMaterials ChemistryForensic engineeringHead (vessel)Ultrasonic sensorTreadbusinessInstrumentation
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The Development and Commissioning of a Laser-Based Ultrasonic Rail Inspection System

2009

Settore ING-IND/14 - Progettazione Meccanica E Costruzione Di Macchinelaser ultrasonic air-coupled sensor rail flaw inspection
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Rail track field testing using laser/air hybrid ultrasonic technique

2003

Nondestructive testing methods used for the testing of rail in tracks worldwide can be limited by discontinuity location or orientation within the rail. Vertical split head and rail base cracks are among those types of discontinuities that are difficult to detect, which in some cases may result in a reail failure in service. A noncontact and remote hybrid ultrasonic technique has been developed by combining laser generation with air coupled detection of ultrasonic signals in rails. The test apparatus mounts on a railroad pushcart and tests are performed in motion with all components kept above the running surface of the rail track. Tracks have been tested for vertical split head and rail ba…

Rail base crackMaterials Science (miscellaneous)UltrasoundAir coupled ultrasoundLaser ultrasoundAir coupled ultrasound; Laser ultrasound; Rail base cracks; Ultrasound; Vertical split head; Materials Science (miscellaneous)Vertical split head
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CCDC 681289: Experimental Crystal Structure Determination

2009

Related Article: M.D.Santana, L.Lopez-Banet, G.Garcia, L.Garcia, J.Perez, M.Liu|2008|Eur.J.Inorg.Chem.||4012|doi:10.1002/ejic.200800345

Space GroupCrystallographyCrystal System(mu~2~-Hydroxido)-(mu~2~-35-dimethylpyrazolato)-bis(hydrogen tris(35-dimethylpyrazol-1-yl)borate)-di-nickel(ii)Crystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 706868: Experimental Crystal Structure Determination

2012

Related Article: L.Lopez-Banet, M.D.Santana, G.Garcia, J.Perez, L.Garcia, L.Lezama, M.Liu|2012|Polyhedron|31|575|doi:10.1016/j.poly.2011.10.014

Space GroupCrystallographyCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinatestriaqua-(hydrogen tris(35-dimethyl-1H-pyrazol-1-yl)borate)-nickel(ii) dimethylphosphinate dimethylphosphinic acid
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CCDC 681288: Experimental Crystal Structure Determination

2009

Related Article: M.D.Santana, L.Lopez-Banet, G.Garcia, L.Garcia, J.Perez, M.Liu|2008|Eur.J.Inorg.Chem.||4012|doi:10.1002/ejic.200800345

Space GroupCrystallographybis(Hydrogen tris(35-dimethylpyrazol-1-yl)borate)-nickel(ii)Crystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 681290: Experimental Crystal Structure Determination

2009

Related Article: M.D.Santana, L.Lopez-Banet, G.Garcia, L.Garcia, J.Perez, M.Liu|2008|Eur.J.Inorg.Chem.||4012|doi:10.1002/ejic.200800345

Space GroupCrystallographyDiaqua-(hydrogen tris(35-dimethylpyrazol-1-yl)borate)-(35-dimethylpyrazole)-nickel(ii) diethyl phosphateCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 681286: Experimental Crystal Structure Determination

2009

Related Article: M.D.Santana, L.Lopez-Banet, G.Garcia, L.Garcia, J.Perez, M.Liu|2008|Eur.J.Inorg.Chem.||4012|doi:10.1002/ejic.200800345

Space GroupCrystallographyCrystal SystemCrystal StructureCell ParametersAqua-(hydrogen tris(35-dimethylpyrazol-1-yl)borate)-bis(35-dimethylpyrazole)-nickel(ii) diethyl phosphateExperimental 3D Coordinates
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CCDC 824722: Experimental Crystal Structure Determination

2012

Related Article: L.Lopez-Banet, M.D.Santana, G.Garcia, J.Perez, L.Garcia, L.Lezama, M.Liu|2012|Polyhedron|31|575|doi:10.1016/j.poly.2011.10.014

Space GroupCrystallographytriaqua-(hydrogen tris(35-dimethyl-1H-pyrazol-1-yl)borate)-nickel(ii) dibutyl phosphate hemihydrateCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 681287: Experimental Crystal Structure Determination

2009

Related Article: M.D.Santana, L.Lopez-Banet, G.Garcia, L.Garcia, J.Perez, M.Liu|2008|Eur.J.Inorg.Chem.||4012|doi:10.1002/ejic.200800345

(Di-n-butyl phosphoric acid-O)-(hydrogen tris(35-dimethylpyrazol-1-yl)borate)-bis(35-dimethylpyrazole)-nickel(ii) di-n-butyl phosphateSpace GroupCrystallographyCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 706869: Experimental Crystal Structure Determination

2012

Related Article: L.Lopez-Banet, M.D.Santana, G.Garcia, J.Perez, L.Garcia, L.Lezama, M.Liu|2012|Polyhedron|31|575|doi:10.1016/j.poly.2011.10.014

Space GroupCrystallographyCrystal SystemCrystal StructureCell Parametersdiaqua-(35-dimethyl-1H-pyrazole)-(hydrogen tris(35-dimethyl-1H-pyrazol-1-yl)borate)-nickel(ii) hydrogen phenylphosphonateExperimental 3D Coordinates
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CCDC 824723: Experimental Crystal Structure Determination

2012

Related Article: L.Lopez-Banet, M.D.Santana, G.Garcia, J.Perez, L.Garcia, L.Lezama, M.Liu|2012|Polyhedron|31|575|doi:10.1016/j.poly.2011.10.014

diaqua-(hydrogen tris(35-dimethyl-1H-pyrazol-1-yl)borate)-(dimethylphosphinato)-nickel(ii)Space GroupCrystallographyCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 706867: Experimental Crystal Structure Determination

2012

Related Article: L.Lopez-Banet, M.D.Santana, G.Garcia, J.Perez, L.Garcia, L.Lezama, M.Liu|2012|Polyhedron|31|575|doi:10.1016/j.poly.2011.10.014

triaqua-(hydrogen tris(35-dimethyl-1H-pyrazol-1-yl)borate)-nickel(ii) bis(4-nitrophenyl) phosphateSpace GroupCrystallographyCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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