Relevant bibliographies by topics / Laser Profiler

Academic literature on the topic 'Laser Profiler'

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Published: 10 March 2023

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Journal articles on the topic "Laser Profiler"

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Chu, An-Shyang, and M. A. Butler. "Laser surface profiler." Optics Letters 24, no. 7 (April 1, 1999): 457. http://dx.doi.org/10.1364/ol.24.000457.

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Sezen, Halil, and Nicholas Fisco. "EVALUATION AND COMPARISON OF SURFACE MACROTEXTURE AND FRICTION MEASUREMENT METHODS." Journal of Civil Engineering and Management 19, no. 3 (June 14, 2013): 387–99. http://dx.doi.org/10.3846/13923730.2012.746237.

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Two- and three-dimensional macrotexture characteristics of various surfaces were measured using five different testing methods including sand patch method, laser profiler, laser texture scanner, circular texture meter, and x-ray computed tomography (CT) scanning. A dynamic friction tester was also used to measure the friction resistance of the same surfaces. Asphalt and Portland cement concrete samples of various mix designs and finishes and other commonly manufactured textured samples were used. Relationship between the macrotexture and friction was investigated. Mean texture depth (MTD) of 26 laboratory specimens was obtained from volumetric sand patch tests. Two-dimensional profiles and mean profile depth (MPD) of specimens were measured by a laser profiler. A laser texture scanner and a circular texture meter were also used to calculate the MPD of sample surfaces. Three-dimensional rendering of the surfaces were obtained from laser texture scanner and x-ray CT scans. Using the experimental data collected in this study, relationships between friction resistance and macrotexture obtained from different methods were investigated. The estimated texture depths predicted from laser profiler, laser texture scanner, and CT meter were comparable to the MTD obtained from sand patch tests. Also, the friction resistance increased with increasing surface macrotexture.
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Hossain, Md Arafat, John Canning, Kevin Cook, and Abbas Jamalipour. "Smartphone laser beam spatial profiler." Optics Letters 40, no. 22 (November 2, 2015): 5156. http://dx.doi.org/10.1364/ol.40.005156.

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Perera, Rohan W., Starr D. Kohn, and Sohila Bemanian. "Comparison of Road Profilers." Transportation Research Record: Journal of the Transportation Research Board 1536, no. 1 (January 1996): 117–24. http://dx.doi.org/10.1177/0361198196153600117.

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Devices available to measure road profiles vary from the hand-held Dipstick to high-speed, vehicle-based profilers. High-speed, vehicle-based profilers generally use an ultrasonic, laser, or optical measuring system. A profiler calibration study was conducted by the road profiler user group in 1994 by establishing regional calibration centers in Mississippi, Nevada, Pennsylvania, and South Dakota. The study compared the data collected by the profilers with the Dipstick data, and analyzed the effect of surface texture on data collection. At each regional calibration center, asphalt concrete and portland cement concrete test sections were established. Thirty-eight road profilers belonging to state agencies, equipment manufacturers, and FHWA participated in the calibration study. Dipstick measurements and sand-patch tests were conducted at all test sites. The International Roughness Index (IRI) was used as the parameter for performing the analyses. The results of the analyses for the sites in Pennsylvania and South Dakota are presented. The agreement between Dipstick IRI and profiler IRI for a specific profiler varied from site to site. For a specific profiler at some sites, the agreement with the Dipstick IRI was good, while at other sites the agreement was poor. The profilers with ultrasonic measuring systems generally had poor agreement with Dipstick IRI values for asphalt-surfaced sites that had aggregate seal coats.
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Borelli, Noah, Bouzid Choubane, James Greene, Charles Holzschuher, and James Fletcher. "Cross-Correlation Analysis of Line Laser High-speed Inertial Profilers." Transportation Research Record: Journal of the Transportation Research Board 2674, no. 5 (May 2020): 626–36. http://dx.doi.org/10.1177/0361198120917371.

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Thirteen different line-laser high-speed inertial profilers from four different manufacturers were recently tested at the Florida Department of Transportation (FDOT) Inertial Profiler Test Track. The hot-mix asphalt (HMA) track incorporates both dense and open-graded sections with international roughness index (IRI) values ranging from 34 to 104 in./mi. A cross-correlation analysis was performed on the resulting ride data. The accuracy comparison was performed using a SurPro reference profiler. The profilers as a group met the AASHTO R 56 cross-correlation criteria on each section except on a smooth, open-graded section. The profilers as a group met the repeatability cross-correlation on this section, but did not meet the accuracy cross-correlation requirement. This paper presents a description of the testing program, data collection efforts and subsequent analyses and findings.
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Mandlburger, G., M. Pfennigbauer, M. Wieser, U. Riegl, and N. Pfeifer. "EVALUATION OF A NOVEL UAV-BORNE TOPO-BATHYMETRIC LASER PROFILER." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B1 (June 6, 2016): 933–39. http://dx.doi.org/10.5194/isprs-archives-xli-b1-933-2016.

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We present a novel topo-bathymetric laser profiler. The sensor system (RIEGL BathyCopter) comprises a laser range finder, an Inertial Measurement Unit (IMU), a Global Navigation Satellite System (GNSS) receiver, a control unit, and digital cameras mounted on an octocopter UAV (RiCOPTER). The range finder operates on the time-of-flight measurement principle and utilizes very short laser pulses (<1 ns) in the green domain of the spectrum (λ=532 nm) for measuring distances to both the water surface and the river bottom. For assessing the precision and accuracy of the system an experiment was carried out in October 2015 at a pre-alpine river (Pielach in Lower Austria). A 200 m longitudinal section and 12 river cross sections were measured with the BathyCopter sensor system at a flight altitude of 15-20 m above ground level and a measurement rate of 4 kHz. The 3D laser profiler points were compared with independent, quasi-simultaneous data acquisitions using (i) the RIEGL VUX1-UAV lightweight topographic laser scanning system (bare earth, water surface) and (ii) terrestrial survey (river bed). Over bare earth the laser profiler heights have a std. dev. of 3 cm, the water surface height appears to be underestimated by 5 cm, and river bottom heights differ from the reference measurements by 10 cm with a std. dev. of 13 cm. When restricting the comparison to laser profiler bottom points and reference measurements with a lateral offset below 1 m, the values improve to 4 cm bias with a std. dev. of 6 cm. We report additionally on challenges in comparing UAV-borne to terrestrial profiles. Based on the accuracy and the small footprint (3.5 cm at the water surface) we concluded that the acquired 3D points can potentially serve as input data (river bed geometry, grain roughness) and validation data (water surface, water depth) for hydrodynamic-numerical models.
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Mandlburger, G., M. Pfennigbauer, M. Wieser, U. Riegl, and N. Pfeifer. "EVALUATION OF A NOVEL UAV-BORNE TOPO-BATHYMETRIC LASER PROFILER." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B1 (June 6, 2016): 933–39. http://dx.doi.org/10.5194/isprsarchives-xli-b1-933-2016.

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We present a novel topo-bathymetric laser profiler. The sensor system (RIEGL BathyCopter) comprises a laser range finder, an Inertial Measurement Unit (IMU), a Global Navigation Satellite System (GNSS) receiver, a control unit, and digital cameras mounted on an octocopter UAV (RiCOPTER). The range finder operates on the time-of-flight measurement principle and utilizes very short laser pulses (<1 ns) in the green domain of the spectrum (λ=532 nm) for measuring distances to both the water surface and the river bottom. For assessing the precision and accuracy of the system an experiment was carried out in October 2015 at a pre-alpine river (Pielach in Lower Austria). A 200 m longitudinal section and 12 river cross sections were measured with the BathyCopter sensor system at a flight altitude of 15-20 m above ground level and a measurement rate of 4 kHz. The 3D laser profiler points were compared with independent, quasi-simultaneous data acquisitions using (i) the RIEGL VUX1-UAV lightweight topographic laser scanning system (bare earth, water surface) and (ii) terrestrial survey (river bed). Over bare earth the laser profiler heights have a std. dev. of 3 cm, the water surface height appears to be underestimated by 5 cm, and river bottom heights differ from the reference measurements by 10 cm with a std. dev. of 13 cm. When restricting the comparison to laser profiler bottom points and reference measurements with a lateral offset below 1 m, the values improve to 4 cm bias with a std. dev. of 6 cm. We report additionally on challenges in comparing UAV-borne to terrestrial profiles. Based on the accuracy and the small footprint (3.5 cm at the water surface) we concluded that the acquired 3D points can potentially serve as input data (river bed geometry, grain roughness) and validation data (water surface, water depth) for hydrodynamic-numerical models.
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Laguarta, F., I. Al-Khatib, and R. Artigas. "Laser profiler based on the depth from focus principle." Journal of Optics 29, no. 3 (June 1998): 236–40. http://dx.doi.org/10.1088/0150-536x/29/3/025.

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McIvor, Alan M. "Nonlinear calibration of a laser stripe profiler." Optical Engineering 41, no. 1 (January 1, 2002): 205. http://dx.doi.org/10.1117/1.1416694.

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Kolchinskiy, Vladislav, Cheng-Hung Shih, Ikai Lo, and Roman Romashko. "Refractive Index Measurement Using the Laser Profiler." Physics Procedia 86 (2017): 176–80. http://dx.doi.org/10.1016/j.phpro.2017.01.018.

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Dissertations / Theses on the topic "Laser Profiler"

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Meece, Adam. "Laser Guided Navigation System for the Automated Floor Profiler – String Walker Edition." University of Cincinnati / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1491557571704528.

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Ghauri, Farzan Naseer. "Hybrid Photonic Signal Processing." Doctoral diss., University of Central Florida, 2007. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3233.

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This thesis proposes research of novel hybrid photonic signal processing systems in the areas of optical communications, test and measurement, RF signal processing and extreme environment optical sensors. It will be shown that use of innovative hybrid techniques allows design of photonic signal processing systems with superior performance parameters and enhanced capabilities. These applications can be divided into domains of analog-digital hybrid signal processing applications and free-space--fiber-coupled hybrid optical sensors. The analog-digital hybrid signal processing applications include a high-performance analog-digital hybrid MEMS variable optical attenuator that can simultaneously provide high dynamic range as well as high resolution attenuation controls; an analog-digital hybrid MEMS beam profiler that allows high-power watt-level laser beam profiling and also provides both submicron-level high resolution and wide area profiling coverage; and all optical transversal RF filters that operate on the principle of broadband optical spectral control using MEMS and/or Acousto-Optic tunable Filters (AOTF) devices which can provide continuous, digital or hybrid signal time delay and weight selection. The hybrid optical sensors presented in the thesis are extreme environment pressure sensors and dual temperature-pressure sensors. The sensors employ hybrid free-space and fiber-coupled techniques for remotely monitoring a system under simultaneous extremely high temperatures and pressures.
Ph.D.
Optics and Photonics
Optics and Photonics
Optics PhD
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Lam, Norris. "Modeling rating curves from close-range remote sensing data : Application of laser and acoustic ranging instruments for capturing stream channel topography." Doctoral thesis, Stockholms universitet, Institutionen för naturgeografi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-142135.

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A rating curve provides a functional relationship between water height (i.e. stage) and discharge at a specified cross-section in a river. Used in combination with a time series of stage, rating curves become one of the central components for generating continuous records of streamflow. Since developing and maintaining rating curves can be time consuming, hydraulic models have shown potential to reduce the effort required for developing rating curves. A central challenge with modeling procedures, however, is the acquisition of accurate stream channel and floodplain topography. From this perspective, this thesis focuses on the real-world application of close-range remote sensing techniques such as laser-based ranging technologies (i.e. Light detection and ranging or LiDAR) or acoustic based ranging technologies (i.e. acoustic Doppler current profiler or ADCP) to capture topographic information for hydraulic modeling applications across various spatial scales. First, a review of the current LiDAR literature was carried out to identify potential ways to take full advantage of these novel data and technologies in the future. This was followed by four interconnected studies whereby: (i) a low-cost custom laser scanning system was designed to capture grain size distributions for a small stream; (ii) synthetically thinned airborne laser scanning (ALS) data was applied in a physically-based hydraulic modelling framework to develop rating curves; (iii) low-resolution national-scale ALS was coupled with ADCP bathymetry to be used in conjunction with a hydraulic model to develop rating curves; and (iv) the impact of measurement uncertainties on generating rating curves with a hydraulic model were investigated. This thesis highlights the potential of close-range remote sensing techniques for capturing accurate stream channel topography and derive from these data, the necessary parameters required for hydraulic modeling applications.
En avbördningskurva tillhandahåller ett funktionellt förhållande mellan vattendjup (dvs. vattenstånd) och flöde vid ett specifikt tvärsnitt i ett vattendrag. Avbördningskurvan blir en central komponent för generering av kontinuerliga tidsserier av vattenföring från tidsserier av vattenstånd. Eftersom det är tidskrävande att utveckla och underhålla avbördningskurvor erbjuder hydrauliska modeller attraktiva möjligheter att minska den insats som krävs för att utveckla avbördningskurvorna. En central utmaning för sådana modelleringsförfaranden är emellertid tillgången till noggrann topografidata av strömfåran och de omgivande stränderna. Den här avhandlingen fokuserar på tillämpningen av fjärranalystekniker för avståndsmätning på nära håll, såsom laserbaserade teknik (dvs. Light detection and ranging eller LiDAR) och akustisk baserat teknik (dvs. acoustic Doppler current profiler eller ADCP), för att fånga topografisk information för hydraulisk modellering av vattendrag i olika rumsliga skalor. Först presenteras en litteraturstudie av den nuvarande LiDAR-litteratur för att identifiera potentiella sätt att dra full nytta av dessa nya data och tekniker i framtiden. Detta följs av fyra sammanlänkade studier: (i) tillämpning av ett lågkostnads-laseravsökningssystem för att fånga kornstorleksfördelningar i ett litet vattendrag, (ii) syntetiskt förtunnad flygburen laserskanningsdata (ALS) applicerad i en fysiskt baserad hydraulisk modell för att utveckla avbördningskurvor, (iii) lågupplösta ALS från Svensk nationell höjdmodell kopplade med ADCP-batymetri för att ta fram en avbördningskurva med en hydraulisk modell, och (iv) undersökning av effekterna av osäkerheter på mätdata för att generera avbördningskurvor med en hydraulisk modell. Denna avhandling belyser potentialen för fjärranalystekniker för avståndsmätning på nära håll, för att fånga strömfårans exakta topografi och ifrån dessa data härleda de parametrar som krävs för hydrauliska modelleringstillämpningar.

At the time of the doctoral defense, the following paper was unpublished and had a status as follows: Paper 5: Manuscript.

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Hoffman, Bradley R. "Evaluation of the Automated Laser Rut Measurement System Used by the Ohio Department of Transportation." Ohio University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1321627068.

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Polidori, Guillaume. "Etude par visualisation de sillages tridimensionnels : application à un profil d'aile rectangulaire." Poitiers, 1994. http://www.theses.fr/1994POIT2253.

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Ce travail s'inscrit comme une contribution a une meilleure connaissance des sillages a la fois instationnaires et 3d s'etablissant autour de profils limites en envergure par des plaques laterales. A titre d'exemple, nous etudions, par visualisations experimentales, l'ecoulement a l'aval d'un profil d'aile rectangulaire cale sous differentes incidences (=90, 60, 30), impulsivement mis en mouvement, dans la gamme de nombres de reynolds 650re3000. L'analyse est faite dans des sections regulierement reparties le long de l'envergure du profil. Pour ce faire, afin d'assurer la fiabilite des resultats, un dispositif optique original permettant l'obtention simultanee de plusieurs tomographies laser polychromatiques est mis en place. Par association de donnees quantitatives qui en sont deduites, et de visualisations globales, on montre dans le cas d'une aile a 90 d'incidence, comment s'installe dans le temps un courant transversal en provenance des plaques d'extremite, et comment il influence le processus de detachement tourbillonnaire. Une etude specifique de l'ecoulement parietal de jonction, notamment par reconstitution topologique, permet d'expliquer l'origine de ce courant transversal. L'influence du nombre de reynolds et de l'incidence du profil, sur les phenomenes observes, est analysee
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Zemzemi, Imene. "High-performance computing and numerical simulation for laser wakefield acceleration with realistic laser profiles." Thesis, Institut polytechnique de Paris, 2020. http://www.theses.fr/2020IPPAX111.

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Le développement des lasers ultra-courts à de hautes intensités a permis l’émergence de nouveaux domaines de recherche en relation avec l’interaction laser-plasma. En particulier, les lasers petawatt femtoseconde ont ouvert la voie vers la possibilité de concevoir une nouvelle génération d’accélérateurs de particules. La modélisation numérique a largement contribué à l’essor de ce domaine d’accélération des électrons par sillage laser. Dans ce contexte, les codes Particle-In-Cell sont les plus répandus dans la communauté. Ils permettent une description fiable de l’interaction laser plasma et surtout de l’accélération par sillage laser.Cependant, une modélisation précise de la physique en jeu nécessite de recourir à des simulations 3D particulièrement coûteuses. Une manière pour accélérer efficacement ce type de simulations est l’utilisation de modèles réduits qui, tout en assurant un gain en temps de calcul très important, garantissent une modélisation fiable du problème. Parmi ces modèles, la décomposition des champs en modes de Fourier dans la direction azimutale est particulièrement adaptée à l’accélération laser plasma.Dans le cadre de ma thèse, j’ai implémenté ce modèle dans le code open-source SMILEI, dans un premier temps, avec un schéma différences finies (FDTD) pour discrétiser les équations de Maxwell. Néanmoins, ce type de solveur peut induire un effet de Cherenkov numérique qui corrompt les résultats de la simulation. Pour mitiger cet artéfact, j’ai également implémenté une version pseudo-spectrale du solveur de Maxwell qui présente de nombreux avantages en termes de précision numérique.Cette méthode est ensuite mise en oeuvre pour étudier l’impact de profils de lasers réalistes sur la qualité du faisceau d’électrons en exploitant des mesures réalisées sur le laser Apollon. Sa capacité à modéliser correctement les processus physiques présents est analysée en déterminant le nombre de modes nécessaires et en comparant les résultats avec ceux issus des simulations 3D en géométrie Cartésienne. Cette étude montre qu’inclure les défauts du laser mène à des différences dans les résultats et que ces derniers dégradent la performance des accélérateurs-laser plasma notamment en termes de quantité de charge injectée. Ces simulations, instructives pour les futures expériences d’accélération d’électrons par le laser Apollon, mettent en avant la nécessité d’inclure les mesures expérimentales dans la simulation et particulièrement celle du front de phase, pour aboutir à des résultats précis
The advent of ultra-short high-intensity lasers has paved the way to new and promising, yet challenging, areas of research in laser-plasma interaction physics. The success of building petawatt femtosecond lasers offers a promising path for designing future particle accelerators and light sources.Achieving this goal intrinsically relies on the combination of experiments and numerical modeling. So far, Particle-In-Cell (PIC) codes have been the ultimate tool to accurately describe the laser-plasma interaction especially in the field of Laser WakeField Acceleration (LWFA). Nevertheless, the numerical modeling of laser-plasma accelerators in 3D can be a very challenging task due to their high computational cost.A useful approach to speed up such simulations consists of employing reduced numerical modes which simplify the problem while retaining a high fidelity.Among these models, Fourier field decomposition in azimuthal modes for the cylindrical geometry is particularly well suited for physical problems with close to cylindrical symmetry, which is the case in LWFA.During my Ph.D., I first implemented this method in the open-source code SMILEI in the Finite Difference Time Domain (FDTD) discretization scheme for the Maxwell solver. However, this kind of solvers may suffer from numerical Cherenkov radiation (NCR). To mitigate this artifact, I also implemented Maxwell’s solver in the Pseudo Spectral Analytical Domain (PSATD) scheme which offers better accuracy of the results.This method is then employed to study the impact of realistic laser profiles from the Apollon facility on the quality of the accelerated electron beam. Its ability to correctly model the involved physical processes is investigated by determining the optimal number of modes and benchmarking its results with full 3D Cartesian simulations. It is shown that the imperfections in the laser pulse lead to differences in the results compared to theoretical profiles. They degrade the performance of laser-plasma accelerators especially in terms of the quantity of injected charge. These simulations, insightful for the future experiments of LWFA that will be held soon with the Apollon laser, put forward the importance of including realistic lasers in the simulation to obtain reliable results
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Gabolde, Pablo. "Measurements of the spatio-temporal profiles of femtosecond laser pulses." Diss., Available online, Georgia Institute of Technology, 2007, 2007. http://etd.gatech.edu/theses/available/etd-06272007-101312/.

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Thesis (Ph. D.)--Physics, Georgia Institute of Technology, 2008.
Trebino, Rick, Committee Chair ; Kennedy, Brian, Committee Member ; Kuzmich, Alex, Committee Member ; Curtis, Jennifer, Committee Member ; Buck, John, Committee Member.
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Rønningstad, Oyvind. "Device Profile layer for PDCP." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for teknisk kybernetikk, 2013. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-23085.

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The Prosthetic Device Communication Protocol is a CAN-based protocol developed specifically for use within prosthetic devices, for connecting the components of the device, most importantly sensors and actuators. The lower levels of this protocol have already been developed. This thesis focuses on developing a device profile layer, to bring plug-and-play functionality to the protocol.Specifically, this thesis contains a proposed device profile layer, a description of an implementation of the profile layer, and testing of this implementation. Testing results were largely successful, most of the desired functionality was achieved in the implementation.
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Primartomo, A. "Laser surface treatment using customised heat source profiles." Thesis, Loughborough University, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.429008.

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Whaley, Chad. "Laser Guided Automated Floor Profiling - FloorWalker." University of Cincinnati / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1491558782298737.

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Books on the topic "Laser Profiler"

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S, Dongare A., and Bhabha Atomic Research Centre, eds. Digital beam profiler for infrared lasers. Mumbai: Bhabha Atomic Research Centre, 2003.

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M, Margle Janice, and United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch., eds. Velocity profiles in laminar diffusion flames. [Washington, DC]: National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1986.

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Center, Langley Research, ed. Novel Co:MgF lidar for aerosol profiler. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1993.

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Center, Langley Research, ed. Novel Co:MgF ́lidar for aerosol profiler. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1993.

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Cappelli, Mark A. Electron density radial profiles derived from Stark broadening in a sodium plasma produced by laser resonance saturation. [S.l.]: [s.n.], 1987.

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N, Singh Upendra, Ismail Syed, Schwemmer Geary K, Langley Research Center, and United States. National Aeronautics and Space Administration., eds. Nineteenth International Laser Radar Conference. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1998.

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Leland, R. P. Wind profile estimation from point to point laser distortion data. [Washington, DC: National Aeronautics and Space Administration, 1989.

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Bourne, Carlton M. Laser reflectance as a function of rough water glitter profile. Monterey, Calif: Naval Postgraduate School, 1987.

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J, Pagni Patrick, and United States. National Aeronautics and Space Administration., eds. Optical measurements of soot and temperature profiles in premixed propane-oxygen flames. [Washington, DC]: National Aeronautics and Space Administration, 1988.

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W, Fairall C., and Wave Propagation Laboratory, eds. Convective boundary layer structure observed during ROSE-I using the NOAA 915 MHz radar wind profiler. Boulder, Colo: U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, Environmental Research Laboratories, Wave Propagation Laboratory, 1991.

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Book chapters on the topic "Laser Profiler"

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Song, Li, Nathalie Colbert, and Peiying Zhu. "High-Speed, High-Accuracy, Non-Contact Radius Measurement with Laser Profiler." In Laser in der Technik / Laser in Engineering, 264–67. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-662-08251-5_60.

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Sharma, Manoj, Abhishek Parmar, Sandhya Bajaj, and Deepika Porwal. "High Frame Rate Laser Spot Profiler for DEW Diagnostics." In Springer Proceedings in Physics, 319–22. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-9259-1_72.

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Kim, Il Ho, Ji Young Yoon, and Soon Bok Lee. "The Measurement of Residual Deformation in PBGA Package after Reflow Process Using A Newly Developed Laser Profiler." In Experimental Mechanics in Nano and Biotechnology, 513–16. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-415-4.513.

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Cummings, Arthur B. "Ray Tracing Profiles." In Customized Laser Vision Correction, 219–28. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-72263-4_8.

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Demtröder, Wolfgang. "Widths and Profiles of Spectral Lines." In Laser Spectroscopy, 57–98. Berlin, Heidelberg: Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/978-3-662-08260-7_3.

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Demtröder, Wolfgang. "Widths and Profiles of Spectral Lines." In Laser Spectroscopy 1, 75–111. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-53859-9_3.

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Kruer, William L. "Density Profile Modification." In The Physics Of Laser Plasma Interactions, 115–26. Boca Raton: CRC Press, 2019. http://dx.doi.org/10.1201/9781003003243-10.

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Manhart, S., R. Maurer, H. J. Tiziani, Z. Sodnik, E. Fischer, A. Mariani, R. Bonsignori, G. Margheri, C. Giunti, and S. Zatti. "Dual-Wavelength Interferometer for Surface Profile Measuremts." In Laser/Optoelektronik in der Technik / Laser/Optoelectronics in Engineering, 217–24. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-48372-1_44.

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Mrochen, Michael, Nicole Lemanski, and Bojan Pajic. "Optical Physics of Customized Laser Ablation Profiles." In Customized Laser Vision Correction, 95–114. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-72263-4_3.

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Wischeropp, Tim Marten. "Effect of Laser Beam Profile on SLM Process." In Advancement of Selective Laser Melting by Laser Beam Shaping, 61–112. Berlin, Heidelberg: Springer Berlin Heidelberg, 2021. http://dx.doi.org/10.1007/978-3-662-64585-7_5.

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Conference papers on the topic "Laser Profiler"

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Martin, Francois, and John Laurent. "Smart laser profiler." In Electronic Imaging 2004, edited by Jeffery R. Price and Fabrice Meriaudeau. SPIE, 2004. http://dx.doi.org/10.1117/12.525768.

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Johnson, Steven C. "Space Shuttle Wind Profiler." In Coherent Laser Radar. Washington, D.C.: Optica Publishing Group, 1991. http://dx.doi.org/10.1364/clr.1991.tud3.

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Knowledge of winds is required to reduce aerodynamic loads on the Space Shuttle during launch. Knowledge of winds is also required to safely land the unpowered orbiter. Balloons are currently used in both instances to produce the necessary wind profiles. The balloons require an hour to rise through the altitude range, sometimes drifting far from the area where the wind measurement is desired. As a result, the correlation between the actual winds encountered by the vehicle and those measured is reduced. NASA is investigating the potential of alternate wind sensors to produce more local wind measurement in less time to increase this correlation. Lidar is one technique under investigation.
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Werner, Christian, Victor Banakh, Friedrich Köpp, and Igor Smalikho. "Wind Profiler for the Atmospheric Boundary L." In Coherent Laser Radar. Washington, D.C.: Optica Publishing Group, 1995. http://dx.doi.org/10.1364/clr.1995.ma4.

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The wind field and turbulence of the atmospheric boundary layer are important parameters for various application fields, like meteorology, atmospheric physics, environmental protection, wind-energy utilization, air-traffic control, and-so-on. Their high variability in spatial and temporal scales necessitates a fast remote-sensing method. From the available techniques the Doppler Lidar has proved to be the most promising candidate. Therefore, DLR has combined its well established Laser Doppler Anemometer (LDA) and its laser-based Ceilometer with a Sonic Anemometer. The laser systems are working in the eye-safe wavelength respectively energy region. These subsystems are forming the so-called DLR Windprofiler which is characterized by compact design and half-automatic operation.
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Radmehr, Ahmad, Arash Hosseinian Ahangarnejad, Ali Tajaddini, and Mehdi Ahmadian. "Surface Profile and Third-Body Layer Accumulation Measurement Using a 3D Laser Profiler." In 2020 Joint Rail Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/jrc2020-8041.

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Abstract The surface profile wear and the resulting third-body layer accumulation are investigated on the Virginia Tech-Federal Railroad Administration Roller Rig (VT-FRA Roller Rig), using a high-precision 3D laser profiler by Keyence. It is observed that the wheel surface gradually wears and the fine worn material accumulates on the running surfaces. It is further observed that with the progression of the wear and accumulation of a powder-like material at running surface, a preocular change in wheel-rail traction occurs. The first step in exploring the physics of the changes in traction is quantifying, precisely, the micron-sized surface finish changes and wear material accumulation. This paper provides the process of choosing a suitable surface profiler for the VT-FRA roller rig adaptation, and the results of a series of tests under various wheel load and contact configurations. A baseline experiment is conducted to evaluate the wheel wear and the accumulation of the naturally-generated third body layer (the worn material) on the wheel’s running surface. Before each series of experiments, the wheel and roller running surfaces were polished and thoroughly cleaned to make sure that they are perfectly smooth (finished) and free of any debris or dust. The wheel surface profile is measured in the perfectly cleaned condition using the 3D laser scanner. Time controlled experiments are run with different wheel loads, % slippage, and angle of attack (AoA) for 500 seconds. For each run, the change with surface finish and accumulated third body layer build up is measured. It is consistently observed that the traction forces increase gradually with time until they reach a stable level, presented by a plateau in the traction-slippage curves. The time to reach the plateau is directly related to wheel’s dynamic conditions including load, %slippage, and AOA. For some of the conditions, such as wheel load, the relationship is linear and for others (such as AOA) it is nonlinear. Concentrating on the analysis of the baseline results, it is observed that the change in surface finish and the third body layer that naturally accumulates at the running surface — hence, referred to as “natural third body layer” or “NTBL” — is directly correlated and somewhat linearly with NTBL and change in the running surface from smooth to rough. The correlation is most noticeable for the NTBL. With increasing NTBL, traction increases rapidly until the running surface is saturated with the accumulated wear material, presumably a ferrous oxide. There is far weaker correlation between the change in surface finish and traction variations. It is noticed that the surface finish continues to change beyond the time that the traction forces reach their plateau, and its effect remains far more gradual than NTBL.
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Meiling, Jr., John A., and Shaun Coles. "New design of an optical profiler." In Laser Dimensional Metrology: Recent Advances for Industrial Application, edited by Michael J. Downs. SPIE, 1993. http://dx.doi.org/10.1117/12.168068.

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Rouse, Gordon F., Harold R. Bagley, Thomas J. Kane, and Christopher Leung. "Development of a laser wind and hazard profiler." In SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, edited by Daniel B. Thompson and Robert J. Baumbick. SPIE, 1996. http://dx.doi.org/10.1117/12.254217.

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Cowles, Timothy J., Russell A. Desiderio, James N. Moum, Michael L. Myrick, Darrel G. Garvis, and S. M. Angel. "Fluorescence microstructure using a laser/fiber optic profiler." In Orlando '90, 16-20 April, edited by Richard W. Spinrad. SPIE, 1990. http://dx.doi.org/10.1117/12.21455.

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Caber, Paul J., Stephen J. Martinek, and Robert J. Niemann. "New interferometric profiler for smooth and rough surfaces." In Laser Dimensional Metrology: Recent Advances for Industrial Application, edited by Michael J. Downs. SPIE, 1993. http://dx.doi.org/10.1117/12.168073.

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Hodgkin, Van A. "An error analysis of the Wyko TOPO noncontact surface profiler." In Laser-Induced Damage in Optical Materials 1989. SPIE, 1990. http://dx.doi.org/10.1117/12.2294433.

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Chotiros, Nicholas P., Kathryn R. Loeffler, and Thien-An N. Nguyen. "Calibration of a seafloor microtopography laser high-definition profiler." In SPIE Defense, Security, and Sensing, edited by Monte D. Turner and Gary W. Kamerman. SPIE, 2010. http://dx.doi.org/10.1117/12.849054.

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Reports on the topic "Laser Profiler"

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Nantung, Tommy E., Jusang Lee, John E. Haddock, M. Reza Pouranian, Dario Batioja Alvarez, Jongmyung Jeon, Boonam Shin, and Peter J. Becker. Structural Evaluation of Full-Depth Flexible Pavement Using APT. Purdue University, 2021. http://dx.doi.org/10.5703/1288284317319.

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The fundamentals of rutting behavior for thin full-depth flexible pavements (i.e., asphalt thickness less than 12 inches) are investigated in this study. The scope incorporates an experimental study using full-scale Accelerated Pavement Tests (APTs) to monitor the evolution of each pavement structural layer's transverse profiles. The findings were then employed to verify the local rutting model coefficients used in the current pavement design method, the Mechanistic-Empirical Pavement Design Guide (MEPDG). Four APT sections were constructed using two thin typical pavement structures (seven-and ten-inches thick) and two types of surface course material (dense-graded and SMA). A mid-depth rut monitoring and automated laser profile systems were designed to reconstruct the transverse profiles at each pavement layer interface throughout the process of accelerated pavement deterioration that is produced during the APT. The contributions of each pavement structural layer to rutting and the evolution of layer deformation were derived. This study found that the permanent deformation within full-depth asphalt concrete significantly depends upon the pavement thickness. However, once the pavement reaches sufficient thickness (more than 12.5 inches), increasing the thickness does not significantly affect the permanent deformation. Additionally, for thin full-depth asphalt pavements with a dense-graded Hot Mix Asphalt (HMA) surface course, most pavement rutting is caused by the deformation of the asphalt concrete, with about half the rutting amount observed within the top four inches of the pavement layers. However, for thin full-depth asphalt pavements with an SMA surface course, most pavement rutting comes from the closet sublayer to the surface, i.e., the intermediate layer. The accuracy of the MEPDG’s prediction models for thin full-depth asphalt pavement was evaluated using some statistical parameters, including bias, the sum of squared error, and the standard error of estimates between the predicted and actual measurements. Based on the statistical analysis (at the 95% confidence level), no significant difference was found between the version 2.3-predicted and measured rutting of total asphalt concrete layer and subgrade for thick and thin pavements.
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Ross, Marc C. LASER-BASED PROFILE MONITOR FOR ELECTRON BEAMS. Office of Scientific and Technical Information (OSTI), May 2003. http://dx.doi.org/10.2172/813156.

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Sepke, Scott M. The Super Gaussian Laser Intensity Profile in HYDRA's 3D Laser Ray Trace Package. Office of Scientific and Technical Information (OSTI), January 2017. http://dx.doi.org/10.2172/1341965.

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Salter, M., E. Rescorla, and R. Housley. Suite B Profile for Transport Layer Security (TLS). RFC Editor, March 2009. http://dx.doi.org/10.17487/rfc5430.

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Salter, M., and R. Housley. Suite B Profile for Transport Layer Security (TLS). RFC Editor, January 2012. http://dx.doi.org/10.17487/rfc6460.

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Scime, Earl E. Two Photon Absorption Laser Induced Fluorescence for Neutral Hydrogen Profile Measurements. Office of Scientific and Technical Information (OSTI), September 2016. http://dx.doi.org/10.2172/1326021.

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Murphy, B. Spatial Profile Flattening of Ultraviolet Laser Pulses with Aspheric Refractive Optics. Office of Scientific and Technical Information (OSTI), January 2005. http://dx.doi.org/10.2172/839685.

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Schaubert, D. H., S. J. Frasier, and J. R. Carswell. Use of Turbulent Eddy Profiler in Making Atmospheric Boundary Layer Measurements. Fort Belvoir, VA: Defense Technical Information Center, March 2002. http://dx.doi.org/10.21236/ada414537.

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Schaubert, Daniel H., Stephen J. Frasier, James R. Carswell, Jie Li, and Fransicso Lopez-Dekker. Use of Turbulent Eddy Profiler in Making Atmospheric Boundary Layer Measurements. Fort Belvoir, VA: Defense Technical Information Center, January 2000. http://dx.doi.org/10.21236/ada392086.

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Friehe, Carl A. Flux Profiles in the Marine Layer Over the Open Ocean. Fort Belvoir, VA: Defense Technical Information Center, June 1996. http://dx.doi.org/10.21236/ada326224.

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