Relevant bibliographies by topics / Corrective surface

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Corrective surface'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Corrective surface"

1

Chen, Xun. "Corrective Abrasive Polishing Processes for Freeform Surface." Key Engineering Materials 404 (January 2009): 103–12. http://dx.doi.org/10.4028/www.scientific.net/kem.404.103.

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Traditionally, abrasive finishing process only focused on producing excellent surface finish on regular form shapes. Ever increasing demands in freeform features in aerospace, energy and medicine applications require abrasive finishing technology not only provides excellent surface finish but also is capable to correct the errors on freeform surfaces. The paper presents current development of corrective polishing technology for freeform surfaces.
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Bonnand, Romain, Jerome Degallaix, Raffaele Flaminio, et al. "Large mirror surface control by corrective coating." Classical and Quantum Gravity 30, no. 15 (2013): 155014. http://dx.doi.org/10.1088/0264-9381/30/15/155014.

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Farhang, K., and A. Lim. "A Kinetic Friction Model for Viscoelastic Contact of Nominally Flat Rough Surfaces." Journal of Tribology 129, no. 3 (2007): 684–88. http://dx.doi.org/10.1115/1.2736730.

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Approximate closed-form equations are derived for normal and tangential contact forces of rough surfaces in dry friction. Using an extension of the Greenwood and Tripp (1970, Proc, Inst. Mech. Eng., 185, pp. 625–633) model, in which the derivations permit asperity shoulder-to-shoulder contact and viscoelastic asperity behavior, mathematical formulae are derived for normal and tangential components of the contact force that depend not only on the proximity of the two surfaces but also the rate of approach and relative sliding. A statistical approach is forwarded in which dependence of the asperity tangential contact force on relative tangential velocity of two asperities can be cast as corrective factors in the mathematical description of tangential force. In this regard two corrective coefficients are derived: force directionality corrective coefficient and force–velocity directionality corrective coefficient. The results show that for a moderate to high load ranges the contact force can be analytically described to within 20% accuracy of that from a numerical integration of the contact equations, well below the uncertainties due to surface profile measurement.
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Amador-Jimenez, Luis, and Amir Pooyan Afghari. "Road Safety and Pavement Management: a case study of Tanzania." Baltic Journal of Road and Bridge Engineering 10, no. 2 (2015): 132–40. http://dx.doi.org/10.3846/bjrbe.2015.17.

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The implementation of pavement management seems to ignore road safety, with its focus being mainly on infrastructure condition. Safety management as part of pavement management should consider various means of reducing the frequency of vehicle crashes by allocating corrective measures to mitigate accident exposure, as well as reduce accident severity and likelihood. However, it is common that lack of accident records and crash contributing factors impedes incorporating safety into pavement management. This paper presents a case study for the initial development of pavement management systems considering data limitations for 3000 km of Tanzania’s national roads. A performance based optimization utilizes indices for safety and surface condition to allocate corrective measures. A modified Pareto analysis capable of accounting for annual performance and of balancing resources to achieve good surface condition and low levels of safety was applied. Tradeoff analysis for the case study found the need to assign 30% relevance to condition and 70% to road safety. Safety and condition deficiencies were corrected within 5 years with the majority of improvements dedicated to surface treatments and some geometric corrections. Large investments for correcting geo-metric issues were observed in years two and three if more money was made available.
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Shakeri, M., Hossein Amirabadi, and Osamu Horiuchi. "Measuring out of Flatness of a Rough Quartz Surface and Correction by Mist-Abrasion Machining." Advanced Materials Research 83-86 (December 2009): 1016–24. http://dx.doi.org/10.4028/www.scientific.net/amr.83-86.1016.

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In this research, Air mist-abrasion machining method for corrective figuring of a rough isotropic quartz surface before polishing process has been proposed. By this method, not only the next polishing time decreases, but also figuring efficiency increases through the possibility of using bigger abrasive grain size. Since the restrictions of laser interferometer measuring devices, capacitor probe has been used for measuring “out of flatness” of a rough isotropic quartz surface and creating error map for corrective figuring. By the proposed Air mist-abrasion figuring method, flatness of a rough isotropic quartz surface improved from PV= 0.4μm to PV=0.1μm without any change in surface roughness value.
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Foulston, J., M. Lord, and S. West. "Changes in plantar surface shape induced by corrective forefoot eversion." Clinical Biomechanics 5, no. 4 (1990): 229–35. http://dx.doi.org/10.1016/0268-0033(90)90006-r.

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Keat, W. D., D. M. Maybury, and B. S. Annigeri. "Surface Integral and Finite Element Hybrid Method for Three-Dimensional Analysis of Arbitrarily Shaped Surface Cracks." Journal of Engineering for Gas Turbines and Power 118, no. 2 (1996): 406–10. http://dx.doi.org/10.1115/1.2816604.

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A three-dimensional surface integral and finite element hybrid method has been developed for modeling arbitrarily shaped surface cracks in complex structural components. Accurate stress intensity factors were obtained by decomposing the problem into a surface integral model of the fracture in a domain of infinite extent and a finite element model of the uncracked domain. Boundary conditions were enforced by applying corrective traction to the surfaces of both constituent models. Coupling between the two formulations was minimized by implementing the fundamental solution for a force multipole near a planar free surface. Surface cracks intersecting nonplanar free surfaces were modeled in a piecewise linear fashion by deploying multiple sets of these functions. The effectiveness of this approach was demonstrated for well-documented cases, including a corner crack in a thick plate and a three-dimensional edge crack. The results of these benchmark studies will be used to develop a set of heuristics for assuring suitable finite element mesh densities in the vicinity of the fracture.
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Bertol, Ildegardis, Fabrício Tondello Barbosa, Álvaro Luiz Mafra, and Murilo Córdova Flores. "Soil water erosion under different cultivation systems and different fertilization rates and forms over 10 years." Revista Brasileira de Ciência do Solo 38, no. 6 (2014): 1918–28. http://dx.doi.org/10.1590/s0100-06832014000600026.

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The action of rain and surface runoff together are the active agents of water erosion, and further influences are the soil type, terrain, soil cover, soil management, and conservation practices. Soil water erosion is low in the no-tillage management system, being influenced by the amount and form of lime and fertilizer application to the soil, among other factors. The aim was to evaluate the effect of the form of liming, the quantity and management of fertilizer application on the soil and water losses by erosion under natural rainfall. The study was carried out between 2003 and 2013 on a Humic Dystrupept soil, with the following treatments: T1 - cultivation with liming and corrective fertilizer incorporated into the soil in the first year, and with 100 % annual maintenance fertilization of P and K; T2 - surface liming and corrective fertilization distributed over five years, and with 75 % annual maintenance fertilization of P and K; T3 - surface liming and corrective fertilization distributed over three years, and with 50 % annual maintenance fertilization of P and K; T4 - surface liming and corrective fertilization distributed over two years, and with 25 % annual maintenance fertilization of P and K; T5 - fallow soil, without liming or fertilization. In the rotation the crops black oat (Avena strigosa ), soybean (Glycine max ), common vetch (Vicia sativa ), maize (Zea mays ), fodder radish (Raphanus sativus ), and black beans (Phaseolus vulgaris ). The split application of lime and mineral fertilizer to the soil surface in a no-tillage system over three and five years, results in better control of soil losses than when split in two years. The increase in the amount of fertilizer applied to the soil surface under no-tillage cultivation increases phytomass production and reduces soil loss by water erosion. Water losses in treatments under no-tillage cultivation were low in all crop cycles, with a similar behavior as soil losses.
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Cai, Y.-L., and G. Xi. "Global tool interference detection in five-axis machining of sculptured surfaces." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 216, no. 10 (2002): 1345–53. http://dx.doi.org/10.1243/095440502320405430.

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This paper presents a new method for the detection and elimination of global interference in five-axis machining of sculptured surfaces. Projecting points on the surface to the axis of cutter, the minimum distance from surface to cutter axis can be directly calculated by an iterative algorithm; the amount of interference is subsequently determined. A corrective method for generating an interferential-free cutter location is then proposed. The implementation has proved that the proposed method has a high efficiency and precision.
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Janssens, L. A., Y. M. Béosier, and R. Daems. "Grossly apparent cartilage erosion of the patellar articular surface in dogs with congenital medial patellar luxation." Veterinary and Comparative Orthopaedics and Traumatology 22, no. 03 (2009): 222–24. http://dx.doi.org/10.3415/vcot-07-08-0076.

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SummaryOne hundred and forty-five stifles of client-owned dogs that underwent corrective surgery for congenital medial patellar luxation were inspected for cartilage erosion on the articular surface of the patella. The lesions were mapped in surface percentage ranges of 20% and by location. Two-thirds of the patellae had cartilage erosion. Cartilage erosion varied between 0 and 100% of the total patellar articular surface and was localised mainly on the medial and distal side of the patella. Dogs with Grade IV patellar luxations and heavier dogs were more affected. The majority of dogs in our study with congenital medial patellar luxation had grossly apparent cartilage erosion on the articular surface of the patella, which may help to explain why certain patients do not function well clinically after technically successful corrective surgery.
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Dissertations / Theses on the topic "Corrective surface"

1

Werenskjold, G. Karl. "An exploratory analysis of corrective maintenance during extended surface ship deployments." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1998. http://handle.dtic.mil/100.2/ADA356567.

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Thesis (M.S. in Operations Research) Naval Postgraduate School, September 1998.<br>"September 1998." Thesis advisor(s): Donald P. Gaver. Includes bibliographical references (p. 105). Also Available online.
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Danila, Uliana. "Mold2012 : a new gravimetric quasigeoid model over Moldova." Licentiate thesis, KTH, Geodesi och geoinformatik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-105755.

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In order to be able to use the operational Moldavian GNSS Positioning System MOLDPOS efficiently for the determination of normal heights in surveying engineering, e.g. during the construction of a road, an accurate quasigeoid model is needed. The main goal of this thesis is to present a new gravimetric quasigeoid model for Moldova (Mold2012), which has been determined by applying the Least Squares Modification of Stokes’ formula with Additive corrections (LSMSA), also called the KTH method. Due to limited coverage of gravity data, the integration area is often limited to a small spherical cap around the computation point, which leads to a truncation error for geoid height. Molodensky et al. (1962) showed that the truncation error can be reduced by the modification of Stokes’ formula, where the measured gravity data are combined with the low-frequency component of the geoid from a Global Gravitational Model (GGM). The LSMSA technique combines the GGM and the terrestrial data in an optimum way. In order to find the most suitable modification approach or cap size it is necessary to compare the gravimetric height anomalies with the GPS/levelling derived height anomalies, and for this purpose we use a GPS/levelling dataset that consists of 1042 points with geodetic coordinates in the MOLDREF99 reference system and normal heights at the same points given in the height system Baltic 77. The magnitude of the additive corrections varies within an interval from -0.6 cm to -4.3 cm over the area of Moldova. The quasigeoid model which results from combining the ITG-Grace02s solution (with n = M = 170, ψ0 = 3° and σΔg = 10 mGal) and the solution obtained from the modified Stokes’ formula together with the additive correction gives the best fit for the GPS/levelling data with a standard deviation (STD) of ±7.8 cm. The evaluation of the computed gravimetric quasigeoid is performed by comparing the gravimetric height anomalies with the GPS/levelling derived height anomalies for 1042 points. However, the above heterogeneous data include outliers, and in order to find and eliminate these, a corrector surface model is used. This surface provides a connection to the local vertical when the GNSS technique is used. After the elimination of the suspicious outliers (170 points) according to a 2-RMS test, a new corrective surface was computed based on the remaining 872 GPS/levelling points, and the STD of residuals became ±4.9 cm. The STD value for the residuals according to the order of the levelling network for the Mold2012 fitted to the local vertical datum is 3.8 cm for the I-order, 4.3 cm for the II-order, 4.5 cm for the III-order and 5.0 cm for the IV-order levelling network. But the STD of the residuals for the 18 control points indicates a better result where the STD is 3.6 cm and RMS is 3.9 cm and the min and max value of residuals is -5.3 cm and 9.0 cm, respectively. As the STD of the differences in height anomaly are not just the standard error of the height anomalies (quasigeoid model), but it contains also the standard errors of GPS heights and of normal heights. Assuming that the latter STDs are 3 cm and 3.5 cm, respectively, the STD of Mold2012 is estimated to 1.7 cm.<br><p>QC 20121127</p>
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Mccafferty, Sean Joseph. "Analysis and Application of Opto-Mechanics to the Etiology of Sub-Optimal Outcomes in Laser Corrective Eye Surgery and Design Methodology of Deformable Surface Accommodating Intraocular Lenses." Thesis, The University of Arizona, 2015. http://hdl.handle.net/10150/556806.

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Overview: Optical concepts as they relate to the ophthalmologic correction of vision in corneal laser vision correction and intraocular lens design was examined. Purpose: The interaction between the excimer laser and residual corneal tissue in laser vision correction produces unwanted side effects. Understanding the origin of these artifacts can lead to better procedures. Furthermore, accommodating intraocular lenses offer a potential for eliminating presbyopia. Understanding the properties of a new accommodating intraocular lens incorporating a deformable interface may lead to advances in cataract surgery. Introduction: Corneal surface irregularities following laser refractive procedures are commonly seen. They regularly result in a patient’s decreased best corrected visual acuity and decreased contrast sensitivity. These changes are only seen in biologic tissue and the etiology has been elusive. A thermal response has been theorized and was investigated in this research. In addition, intraocular lenses using a mechanically deforming interface to change their power in order to duplicate natural accommodation have been developed. The deforming interface(s) induce optical aberrations due to irregular deformations. Design efforts have centered on minimizing these deformations. Both of the ophthalmic applications have been analyzed using finite element analysis (FEA) to understand their inherent optical properties. Methods: FEA modeling of thermal theory has been applied to verify that excimer laser induced collagen contraction creates corneal surface irregularities and central islands. A mathematical model which indicates the viability of the theory was developed. The modeling results were compared to post ablation changes in eyes utilizing an excimer (ArF 193 nm), as well as non-ablative thermal heating in eyes with a CO₂ laser. Addition modeling was performed on an Intraocular lens prototype measuring of actuation force, lens power, interface contour, optical transfer function, and visual Strehl ratio. Prototype verified mathematical models were utilized to optimize optical and mechanical design parameters to maximize the image quality and minimize the required force. Results: The predictive model shows significant irregular central buckling formation and irregular folding. The amount of collagen contraction necessary to cause significant surface changes is very small (0.3%). Uniform scanning excimer laser ablation to corneal stroma produces a significant central steepening and peripheral flattening in the central 3mm diameter. Isolated thermal load from uniform CO₂ laser irradiation without ablation also produces central corneal steepening and paracentral flattening in the central 3mm diameter. The iterative mathematical modeling based upon the intraocular lens prototype yielded maximized optical and mechanical performance through varied input mechanical and optical parameters to produce a maximized visual Strehl ratio and a minimized force requirement. Conclusions: The thermal load created by laser irradiation creates a characteristic spectrum of morphologic changes on the porcine corneal stromal surface which correlates to the temperature rise and is not seen inorganic, isotropic material. The highly similar surface changes seen with both lasers are likely indicative of temperature induced transverse collagen fibril contraction and stress re-distribution. Refractive procedures which produce significant thermal load should be cognizant of these morphological changes. The optimized intraocular lens operates within the physiologic constraints of the human eye including the force available for full accommodative amplitude using the eye’s natural focusing feedback, while maintaining image quality in the space available. Optimized optical and mechanical performance parameters were delineated as those which minimize both asphericity and actuation pressure. The methodology combines a multidisciplinary basic science approach from biomechanics, optical science, and ophthalmology to optimize an intraocular lens design suitable for preliminary trials.
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Mccafferty, Sean. "Analysis and application of opto-mechanics to the etiology of sub-optimal outcomes in laser corrective eye surgery and design methodology of deformable surface accommodating intraocular lenses." Thesis, The University of Arizona, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=1589573.

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<p> <b>Overview:</b> Optical concepts as they relate to the ophthalmologic correction of vision in corneal laser vision correction and intraocular lens design was examined. </p><p> <b>Purpose:</b> The interaction between the excimer laser and residual corneal tissue in laser vision correction produces unwanted side effects. Understanding the origin of these artifacts can lead to better procedures. Furthermore, accommodating intraocular lenses offer a potential for eliminating presbyopia. Understanding the properties of a new accommodating intraocular lens incorporating a deformable interface may lead to advances in cataract surgery. </p><p> <b>Introduction:</b> Corneal surface irregularities following laser refractive procedures are commonly seen. They regularly result in a patient&rsquo;s decreased best corrected visual acuity and decreased contrast sensitivity. These changes are only seen in biologic tissue and the etiology has been elusive. A thermal response has been theorized and was investigated in this research. In addition, intraocular lenses using a mechanically deforming interface to change their power in order to duplicate natural accommodation have been developed. The deforming interface(s) induce optical aberrations due to irregular deformations. Design efforts have centered on minimizing these deformations. Both of the ophthalmic applications have been analyzed using finite element analysis (FEA) to understand their inherent optical properties. </p><p> <b>Methods:</b> FEA modeling of thermal theory has been applied to verify that excimer laser induced collagen contraction creates corneal surface irregularities and central islands. A mathematical model which indicates the viability of the theory was developed. The modeling results were compared to post ablation changes in eyes utilizing an excimer (ArF 193 nm), as well as non-ablative thermal heating in eyes with a CO<sub>2</sub> laser. </p><p> Addition modeling was performed on an Intraocular lens prototype measuring of actuation force, lens power, interface contour, optical transfer function, and visual Strehl ratio. Prototype verified mathematical models were utilized to optimize optical and mechanical design parameters to maximize the image quality and minimize the required force. </p><p> Results: The predictive model shows significant irregular central buckling formation and irregular folding. The amount of collagen contraction necessary to cause significant surface changes is very small (0.3%). Uniform scanning excimer laser ablation to corneal stroma produces a significant central steepening and peripheral flattening in the central 3mm diameter. Isolated thermal load from uniform CO<sub>2</sub> laser irradiation without ablation also produces central corneal steepening and paracentral flattening in the central 3mm diameter. </p><p> The iterative mathematical modeling based upon the intraocular lens prototype yielded maximized optical and mechanical performance through varied input mechanical and optical parameters to produce a maximized visual Strehl ratio and a minimized force requirement. </p><p> <b>Conclusions:</b> The thermal load created by laser irradiation creates a characteristic spectrum of morphologic changes on the porcine corneal stromal surface which correlates to the temperature rise and is not seen inorganic, isotropic material. The highly similar surface changes seen with both lasers are likely indicative of temperature induced transverse collagen fibril contraction and stress re-distribution. Refractive procedures which produce significant thermal load should be cognizant of these morphological changes. </p><p> The optimized intraocular lens operates within the physiologic constraints of the human eye including the force available for full accommodative amplitude using the eye&rsquo;s natural focusing feedback, while maintaining image quality in the space available. Optimized optical and mechanical performance parameters were delineated as those which minimize both asphericity and actuation pressure. The methodology combines a multidisciplinary basic science approach from biomechanics, optical science, and ophthalmology to optimize an intraocular lens design suitable for preliminary trials.</p>
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Hellström, Matti. "Chemistry and Physics of Cu and H2O on ZnO Surfaces : Electron Transfer, Surface Triangles, and Theory." Doctoral thesis, Uppsala universitet, Strukturkemi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-236302.

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This thesis discusses the chemistry and physics of Cu and H2O on ZnO surfaces, based primarily on results from quantum chemical calculations. The underlying context is heterogeneous catalysis, where Cu/ZnO-mixtures are used in the industrial synthesis of methanol and in the water gas shift reaction. Electron transfer between small Cu clusters and ZnO is central to this thesis, as are the design and use of models that can describe realistic and very large-scale ZnO surface structures while still retaining the electronic nature of the system. Method and model enhancements as well as tests and validations constitute a large part of this thesis. The thesis demonstrates that the charges of small Cu clusters, adsorbed on the non-polar ZnO(10-10) surface, depend on whether the Cu clusters contain an even or odd number of atoms, and whether water is present (water can induce electron transfer from Cu to ZnO). On the polar Zn-terminated ZnO(0001) surface, Cu becomes negatively charged, which causes it to attract positively charged subsurface defects and to wet the ZnO(0001) surface at elevated temperatures. When a Cu cluster on a ZnO surface becomes positively charged, this happens because it donates an electron to the ZnO conduction band. Hence, it is necessary to use a method which describes the ZnO band gap correctly, and we show that a hybrid density functional, which includes a fraction of Hartree-Fock exchange, fulfills this requirement. When the ZnO conduction band becomes populated by electrons from Cu, band-filling occurs, which affects the adsorption energy. The band-filling correction is presented as a means to extrapolate the calculated adsorption energy under periodic boundary conditions to the zero coverage (isolated adsorbate, infinite supercell) limit. A part of this thesis concerns the parameterization of the computationally very efficient SCC-DFTB method (density functional based tight binding with self-consistent charges), in a multi-scale modeling approach. Our findings suggest that the SCC-DFTB method satisfactorily describes the interaction between ZnO surfaces and water, as well as the stabilities of different surface reconstructions (such as triangularly and hexagonally shaped pits) at the polar ZnO(0001) and ZnO(000-1) surfaces.
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Gyurecz, György, and Tibor Bercsey. "Surface Shape Correction by Highlight Lines." TUDpress - Verlag der Wissenschaften GmbH, 2012. https://tud.qucosa.de/id/qucosa%3A30525.

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The design of industrial products applies various construction aspects. Beside functionality and manufacturability conditions that are essential in technical design, products must also meet aerodynamic, hydrodynamic and aesthetic demands. These demands are particularly important in automotive, ship and airplane industry but they are also present in the design of medical replacements, household appliances, etc. The common objective of above aspects is to produce smooth and irregularity free surface shape. Quality and smoothness of surfaces of industrial objects can efficiently be evaluated by highlight lines.
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Gyurecz, György, and Tibor Bercsey. "Surface Shape Correction by Highlight Lines." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-228739.

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The design of industrial products applies various construction aspects. Beside functionality and manufacturability conditions that are essential in technical design, products must also meet aerodynamic, hydrodynamic and aesthetic demands. These demands are particularly important in automotive, ship and airplane industry but they are also present in the design of medical replacements, household appliances, etc. The common objective of above aspects is to produce smooth and irregularity free surface shape. Quality and smoothness of surfaces of industrial objects can efficiently be evaluated by highlight lines.
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8

Merson, Earl. "Two-channel surface stimulation for the correction of drop foot." Thesis, Bournemouth University, 2017. http://eprints.bournemouth.ac.uk/29316/.

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1 Functional Electrical Stimulation (FES) is used for the correction of drop foot. The clinical objective is to promote dorsiflexion to avoid tripping, and mild eversion for stability during loading. Traditional transcutaneous FES systems require the accurate positioning of surface electrodes on the skin so that the appropriate nerves are activated to give the desired muscle response. Many people find electrode positioning difficult. 2 This project examined the feasibility of using two channels of transcutaneous electrical stimulation as an adaptive system to correct drop foot. Both channels were positioned over the branches of the common peroneal nerve at the fibular head, broadly with the 'lateral' channel promoting eversion and the 'medial' channel promoting dorsiflexion. The main focus of the study was the effect on foot posture of changing the currents in each channel (the 'current balance'), and the possibility of using this in an open-loop or closed-loop control system to compensate for variation in electrode position. 3 In support of closed-loop control, a sensor consisting of switches under the heel, 1st and 5th metatarsal heads was used to assess the degree of inversion/eversion during walking. A simple controller was implemented to link the two-channel stimulation system and the foot posture sensor, with the objective of maintaining a target foot posture despite minor variation in electrode position. 4 The study found that with careful set-up the current balance could affect the inversion/eversion of the foot while also maintaining dorsiflexion. However, the range of posture control was sensitive to the electrode positions and so this approach did not significantly reduce the need to position the electrodes carefully. The signal from the in-shoe foot posture sensor was often poorly correlated with foot posture as measured by a goniometer. The control system responded appropriately to its inputs, but its overall performance was limited by the input sensor and the output range of influence. The two-channel technique may have utility as part of a leg cuff system, enabling the user to fine-tune the foot posture once the electrodes are positioned appropriately.
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McCafferty, Sean, Garrett Lim, William Duncan, Eniko Enikov, and Jim Schwiegerling. "Goldmann Tonometer Prism with an Optimized Error Correcting Applanation Surface." ASSOC RESEARCH VISION OPHTHALMOLOGY INC, 2016. http://hdl.handle.net/10150/622594.

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Purpose: We evaluate solutions for an applanating surface modification to the Goldmann tonometer prism, which substantially negates the errors due to patient variability in biomechanics. Methods: A modified Goldmann or correcting applanation tonometry surface (CATS) prism is presented which was optimized to minimize the intraocular pressure (lOP) error due to corneal thickness, stiffness, curvature, and tear film. Mathematical modeling with finite element analysis (FEA) and manometric lOP referenced cadaver eyes were used to optimize and validate the design. Results: Mathematical modeling of the optimized CATS prism indicates an approximate 50% reduction in each of the corneal biomechanical and tear film errors. Manometric lOP referenced pressure in cadaveric eyes demonstrates substantial equivalence to GAT in nominal eyes with the CATS prism as predicted by modeling theory. Conclusion: A CATS modified Goldmann prism is theoretically able to significantly improve the accuracy of lOP measurement without changing Goldmann measurement technique or interpretation. Clinical validation is needed but the analysis indicates a reduction in CCT error alone to less than +/- 2 mm Hg using the CATS prism in 100% of a standard population compared to only 54% less than +/- 2 mm Hg error with the present Goldmann prism. Translational Relevance: This article presents an easily adopted novel approach and critical design parameters to improve the accuracy of a Goldmann applanating tonometer.
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Hejazin, Yazan Henry. "A Microwave Radiometer Roughness Correction Algorithm For Sea Surface Salinity Retrieval." Master's thesis, University of Central Florida, 2012. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5294.

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The Aquarius/SAC-D is an Earth Science remote sensing satellite mission to measure global Sea Surface Salinity (SSS) that is sponsored by the NASA and the Argentine Space Agency (CONAE). The prime remote sensor is the Aquarius (AQ) L-band radiometer/scatterometer, which measures the L-band emitted blackbody radiation (brightness temperature) from the ocean. The brightness temperature at L-band is proportional to the ocean salinity as well as a number of physical parameters including ocean surface wind speed. The salinity retrieval algorithm make corrections for all other parameters before retrieving salinity, and the greatest of these is the increased brightness temperature due to roughness caused by surface wind speed. This thesis presents an independent approach for the AQ roughness correction, which is derived using simultaneous measurements from the CONAE Microwave Radiometer (MWR). When the wind blows over the ocean's surface, the brightness temperature is increased because of the ocean wave surface roughness. The MWR provides a semi-empirical approach by measuring the excess ocean emissivity at 36.5 GHz and then applying radiative transfer theory (improved ocean surface emissivity model) to translate this to the AQ 1.4 GHz frequency (L-band). The theoretical basis of the MWR algorithm is described and empirical results are presented that demonstrate the effectiveness in reducing the salinity measurement error due to surface roughness.<br>ID: 031001312; System requirements: World Wide Web browser and PDF reader.; Mode of access: World Wide Web.; Adviser: Linwood Jones.; Title from PDF title page (viewed March 25, 2013).; Thesis (M.S.E.E.)--University of Central Florida, 2012.; Includes bibliographical references (p. 43-44).<br>M.S.E.E.<br>Masters<br>Electrical Engineering and Computing<br>Engineering and Computer Science<br>Electrical Engineering
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Books on the topic "Corrective surface"

1

Gromada, Magdalena. Correction Formulae for the Stress Distribution in Round Tensile Specimens at Neck Presence. Magdalena Gromada, 2011.

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Gordon, Howard R. Ocean observations with EOS/MODIS: Algorithm development and post launch studies. National Aeronautics and Space Administration, 1995.

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Gordon, Howard R. Ocean observations with EOS/MODIS: Algorithm development and post launch studies : semi-annual report (for January - June 1996), contract number NAS5-31363. National Aeronautics and Space Administration, 1996.

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Gordon, Howard R. Ocean observations with EOS/MODIS: Algorithm development and post launch studies : semi-annual report (for January - June 1997), contract number NAS5-31363. National Aeronautics and Space Administration, 1997.

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Gordon, Howard R. Ocean observations with EOS/MODIS: Algorithm development and post launch studies : semi-annual report (for July - December 1994). National Aeronautics and Space Administration, 1995.

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Gordon, Howard R. Ocean observations with EOS/MODIS: Algorithm development and post launch studies : semi-annual report (for July - December 1995). National Aeronautics and Space Administration, 1996.

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Assembly, COSPAR Scientific. Remote sensing of trace constituents in the lower stratosphere, troposphere and the earth's surface : global observations, air pollution and the atmospheric correction: Proceedings of the A1.2 symposium of COSPAR Scientific Commission A which was held during the thirty-third COSPAR Scientific Assembly, Warsaw, Poland, July, 2000. Published for the Committee on Space Research [by] Pergamon, 2002.

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An Exploratory Analysis of Corrective Maintenance During Extended Surface Ship Deployments. Storming Media, 1998.

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Ross, Stephanie. Style in Art. Edited by Jerrold Levinson. Oxford University Press, 2009. http://dx.doi.org/10.1093/oxfordhb/9780199279456.003.0012.

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The work of two contemporary philosophers in particular, Nelson Goodman and Richard Wollheim, has done much to clarify our understanding of style and of the complex issues with which style becomes intertwined. This article looks through the lens of their proposals. In ‘The Status of Style’, Goodman emphasizes that ‘Style comprises certain characteristic features both of what is said and of how it is said, both of subject and of wording, both of content and of form’. This is an important corrective to the temptation to take style as entirely constituted by formal or surface qualities. Goodman makes his point with examples drawn from nonfiction.
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Radiometric correction of scatterometric wind measurements. Radar Systems and Remote Sensing Laboratory, Dept. of Electrical Engineering and Computer Science, University of Kansas, 1995.

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Book chapters on the topic "Corrective surface"

1

Bhattarai, Deval Prasad, Pashupati Pokharel, and Dequan Xiao. "Correction to: Surface Functionalization of Polymers." In Reactive and Functional Polymers Volume Four. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-52052-6_9.

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Bouganis, Thanasis. "Error Correcting Codes over Algebraic Surfaces." In Applied Algebra, Algebraic Algorithms and Error-Correcting Codes. Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/3-540-44828-4_19.

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Hansen, Johan P. "Toric Surfaces and Error-correcting Codes." In Coding Theory, Cryptography and Related Areas. Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/978-3-642-57189-3_12.

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Valero Ubierna, Constantino. "Positioning systems: GNSS." In Manuali – Scienze Tecnologiche. Firenze University Press, 2020. http://dx.doi.org/10.36253/978-88-5518-044-3.11.

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This topic will provide an overview of the technologies available for georeferencing machinery or any agricultural equipment on the Earth’s surface. Principles of GNSS (global navigation satellite systems) will be presented, along with current satellite constellations such as NAVSTAR GPS, GLONASS, Beidou, Galileo, etc. Error correction based on SBAS services and RTK technology. RTK networks. Definition of static and dynamic errors and accuracy.
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Kalkbrener, Michael. "Implicitization of rational parametric curves and surfaces." In Applied Algebra, Algebraic Algorithms and Error-Correcting Codes. Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/3-540-54195-0_55.

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Sanchez T., German, and John William Branch. "Toward an Automatic Hole Characterization for Surface Correction." In Advances in Visual Computing. Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-17289-2_58.

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Herak, Marijan, Giuliano F. Panza, and Giovanni Costa. "Theoretical and Observed Depth Correction for Ms." In Monitoring the Comprehensive Nuclear-Test-Ban Treaty: Surface Waves. Birkhäuser Basel, 2001. http://dx.doi.org/10.1007/978-3-0348-8264-4_10.

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Benedek, Giorgio, and Jan Peter Toennies. "Correction to: Theory of Atom Scattering from Surface Phonons: Basic Concepts and Temperature Effects." In Springer Series in Surface Sciences. Springer Berlin Heidelberg, 2019. http://dx.doi.org/10.1007/978-3-662-56443-1_15.

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Kondratyev, Kirill Y., Vladimir V. Kozoderov, and Oleg I. Smokty. "Radiative Correction of the Space-Derived Images of the Earth Surface." In Remote Sensing of the Earth from Space: Atmospheric Correction. Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-76747-0_7.

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Yang, Fan, Baoxing Bai, Cheng Han, Chao Zhang, and Yuying Du. "Autonomous Perceptual Projection Correction Technique of Deep Heterogeneous Surface." In Neural Information Processing. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-70090-8_40.

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Conference papers on the topic "Corrective surface"

1

Westcott, Mark. "Corrective surface aspherizing to optimize scan lens distortion." In Optical Fabrication and Testing. OSA, 2000. http://dx.doi.org/10.1364/oft.2000.otuc1.

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Fan, Qi. "Tooth Surface Error Correction for Face-Hobbed Hypoid Gears." In ASME 2009 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/detc2009-86548.

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Face-hobbing is a continuous generating process employed in manufacturing spiral bevel and hypoid gears. Due to machining dynamics and tolerances of machine tools, exact tooth surface geometry may not be obtained from the machining process using theoretical machine tool settings. Repeatable tooth surface geometric errors may be observed. The tooth surface errors will cause unfavorable displacement of tooth contact and increased transmission errors, resulting in noisy operation and premature failure due to edge contact and highly concentrated stresses. In order to eliminate the tooth surface errors and ensure precision products, a corrective machine setting technique is employed to modify the theoretical machine tool settings, compensating for the surface errors. This paper describes a method of correcting tooth surface errors for spiral bevel and hypoid gears generated by face-hobbing process using computer numerically controlled (CNC) hypoid gear generators. Polynomial representation of the universal motions of machine tool settings is considered. The corrective universal motion coefficients are determined through an optimization process with the target of minimization of the tooth surface errors. The sensitivity of the changes of tooth surface geometry to the changes of universal motion coefficients is investigated. A numerical example of a face-hobbed hypoid pinion is presented.
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Farhang, K., and A. Lim. "Viscoelastic Contact of Nominally Flat Rough Surfaces." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-63825.

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Approximate closed-form equations are derived for normal and tangential contact forces of rough surfaces in dry friction. Using an extension of the Greenwood and Tripp model, in which the derivations permit asperity shoulder-to-shoulder contact and viscoelastic asperity behavior. Mathematical formulae are derived for normal and tangential components of the contact force that depend not only on the proximity of the two surfaces but also the rate of approach and relative sliding. A statistical approach is forwarded in which dependence of the asperity tangential contact force on relative tangential velocity of two asperities can be cast as a corrective factor in the mathematical description of tangential force. In this regard two corrective coefficients are derived: force directionality corrective coefficient and force-velocity directionality corrective coefficient. The results show that for a moderate to high load ranges the contact force can be analytically described to within 20 percent accuracy, well below the uncertainties due to surface profile measurement.
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Keat, William D., Daniel M. Maybury, and Balkrishna S. Annigeri. "Surface Integral and Finite Element Hybrid Method for Three-Dimensional Analysis of Arbitrarily-Shaped Surface Cracks." In ASME 1995 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1995. http://dx.doi.org/10.1115/95-gt-456.

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A 3D surface integral and finite element hybrid method has been developed for modeling arbitrarily-shaped surface cracks in complex structural components. Accurate stress intensity factors were obtained by decomposing the problem into a surface integral model of the fracture in a domain of infinite extent and a finite element model of the uncracked domain. Boundary conditions were enforced by applying corrective tractions to the surfaces of both constituent models. Coupling between the two formulations was minimized by implementing the fundamental solution for a force multipole near a planar free surface. Surface cracks intersecting nonplanar free surfaces were modeled in a piecewise linear fashion by deploying multiple sets of these functions. The effectiveness of this approach was demonstrated for well-documented cases including: a corner crack in a thick plate and a 3D edge crack. The results of these benchmark studies will be used to develop a set of heuristics for assuring suitable finite element mesh densities in the vicinity of the fracture.
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Mellon, Brian, Douglas R. McCain, and Raymond M. Post. "Mitigating Manganese-Induced Pitting Failures on a Stainless Steel Surface Condenser." In ASME 2006 Power Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/power2006-88119.

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In early 2005, the 4-unit, 1200 MW Cottonwood Energy facility on the Sabine River in Deweyville, TX experienced a sudden increase in condenser tube failures and eddy current pit indications. Metallurgical analysis of failed tube specimens revealed the presence of a thin, hard manganese-rich coating, with intense pits propagating at breaks in the deposit. Successful mitigation of manganese-induced pitting and repassivation of the condenser tubes requires that the surface and pits first be thoroughly cleaned prior to implementing a manganese deposit control program. This paper reviews the successful cleaning process developed and implemented by Cottonwood Energy to remove manganese deposits from four stainless steel surface condensers. The cleaning procedure employed several novel features to ensure complete manganese removal, minimize environmental impact, reduce costs, control attack on the base tube metal, and ensure personnel safety. The paper also includes a discussion of corrective actions taken to prevent re-occurrence.
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Mashadi, Behrooz, and Majid Majidi. "Integrated AFS and DYC Sliding Mode Controller Design for Hybrid Electric Vehicle." In ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2010. http://dx.doi.org/10.1115/esda2010-25284.

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An integrated controller of active front steering and direct yaw moment is developed in this paper. In upper layer, the corrective steering angle and yaw moment are obtained using sliding mode control. A combined sliding surface is defined in order that the yaw rate and side slip angle of vehicle track the desired values. The corrective yaw moments are applied by electrical motors embedded in rear wheels. The desired value for yaw rate and sideslip angle are obtained from a 4-DOF nonlinear vehicle model. In the lower layer, the active steering, wheel slip and electrical motor torque controllers are designed. Wheel slip and motors torque controllers generate the longitudinal forces in the rear wheels to produce the desired yaw moment. A nonlinear nine degrees of freedom vehicle model is used for simulation purposes. The simulation results illustrate considerable improvements in vehicle handling.
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Bazdidi-Tehrani, F., and G. E. Andrews. "Full Coverage Discrete Hole Film Cooling: Investigation of the Effect of Variable Density Ratio (Part II)." In ASME 1997 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/97-gt-341.

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Experimental results of the corrective film heat transfer coefficient at the hot gas-side of the wall for full coverage discrete hole film cooling are presented for a range of practical geometries. The results are reported for various hot gas mainstream-to-coolant temperature (density) ratios, in the realistic range of 1.0–3.2. For combustor wall and turbine blades film cooling applications, the corrective film heat transfer coefficient was influenced significantly by the design parameters. It decreased with an increase in the number of holes per unit wall surface area, over the range of 4306–26910 m−2 and with an increase in the hole size, in the range of 1.0–2.2 mm, due to the improvement in film cooling. This was supported by the overall cooling effectiveness results, as reported previously (Bazdidi-Tehrani and Andrews 1994). A comparison between the two approaches for the prediction of the convective film heat transfer coefficient was made. It showed that the higher wall overall heat transfer, obtained using the present measurements of the wall overall heat transfer coefficient, resulted in a considerably higher film heat transfer coefficient than that predicted using the summation of the hole approach surface correlation of Sparrow (1982) and the internal hole correlation of Mills (1962). The variation of the mainstream-to-coolant temperature ratio did not establish consistent trends for various configurations and its effect on the film cooling performance was shown to be small.
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Stefanko, David B., and Robert A. Leishear. "Relationship Between Vibrations and Mechanical Seal Failures in Centrifugal Pumps." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-79176.

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A reduction of radial vibrations in mechanical seals increases the life of the seals in centrifugal pumps. Mechanical seals consist of two smooth seal faces. One face is stationary with respect to the pump. The other rotates. Between the faces a fluid film evaporates as the fluid moves radially. Ideally, the film evaporates as it reaches the outer surface of the seal faces, thereby preventing leakage from the pump and effectively lubricating the two surfaces. Relative vibrations between the two surfaces affect the fluid film, damage the faces, and decrease the life of the seals. In a series of industrial applications, different techniques were used to minimize vibration, and the life of the seals was shown to significantly increase. The operating speed was controlled in one case, the bearing design was replaced in another case, and the stiffness of the pump was altered in still another case. The common corrective action in each case was a reduction in vibration.
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Zheng, Yi, and Beiwen Li. "Uniaxial High-Speed Micro-Scale 3D Surface Topographical Measurements Using Fringe Projection." In ASME 2020 15th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/msec2020-8303.

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Abstract In-situ inspection has drawn many attentions in manufacturing due to the importance of quality assurance. With the rapid growth of additive manufacturing technology, the importance of in-line/in-situ inspections has been raised to a higher level due to many uncertainties that could occur during an additive printing process. Given this, having accurate and robust in-situ monitoring can assist corrective actions for a closed-loop control of a manufacturing process. Contact 3D profilometers such as stylus profilometers or coordinate measuring machines can achieve very high accuracies. However, due to the requirement for physical contact, such methods have limited measurement speeds and may cause damage to the tested surface. Thus, contact methods are not quite suitable for real-time in-situ metrology. Non-contact methods include both passive and active methods. Passive methods (e.g., focus variation or stereo vision) hinges on image-based depth analysis, yet the accuracies of passive methods may be impacted by light conditions of the environment and the texture quality of the surface. Active 3D scanning methods such as laser scanning or structured light are suitable for instant quality inspection due to their ability to conduct a quick non-contact 3D scan of the entire surface of a workpiece. Specifically, the fringe projection technique, as a variation of the structured light technique, has demonstrated significant potential for real-time in-situ monitoring and inspection given its merits of conducting simultaneous high-speed (from 30 Hz real-time to kilohertz high speeds) and high accuracy (tens of μm) measurements. However, high-speed 3D scanning methods like fringe projection technique are typically based on triangulation principle, meaning that the depth information is retrieved by analyzing the triangulation relationship between the light emitter (i.e., projector), the image receiver (i.e., camera) and the tested sample surface. Such measurement scheme cannot reconstruct 3D surfaces where large geometrical variations are present, such as a deep-hole or a stair geometry. This is because large geometrical variations will block the auxiliary light used in the triangulation based methods, which will resultantly cause a shadowed area to occur. In this paper, we propose a uniaxial fringe projection technique to address such limitation. We measured a stair model using both conventional triangulation based fringe projection technique and the proposed method for comparison. Our experiment demonstrates that the proposed uniaxial fringe projection technique can perform high-speed 3D scanning without shadows appearing in the scene. Quantitative testing shows that an accuracy of 35 μm can be obtained by measuring a step-height object using the proposed uniaxial fringe projection system.
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Artoni, Alessio, and Massimo Guiggiani. "Revisiting Plane-Generated Gear Tooth Surfaces: A Novel Design Perspective." In ASME 2015 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/detc2015-47327.

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The teeth of ordinary spur and helical gears are generated by a (virtual) rack provided with planar generating surfaces. The resulting tooth surface shapes are a circle-involute cylinder in the case of spur gears, and a circle-involute helicoid for helical gears. Advantages associated with involute geometry are well known: in particular, the motion transmission function is insensitive to center distance variations, and contact lines (or points, when a corrective surface mismatch is applied) evolve along a fixed plane of action, thereby reducing vibrations and noise emission. As a result, involute gears are easier to manufacture and assemble than non-involute gears, and silent to operate. A peculiarity of their generation process is that the motion of the generating planar surface, seen from the fixed space, is a rectilinear translation (while the gear blank is rotated about a fixed axis): the component of such translation that is orthogonal to the generating plane is the one that ultimately dictates the shape of the generated, envelope surface. Starting from this basic fact, we set out to investigate this type of generation-by-envelope process and to profitably use it to explore new potential design layouts. In particular, with some similarity to the basic principles underlying conical involute (or Beveloid) gears, but within a broader scope, we propose a generalization of these concepts to the case of involute surfaces for motion transmission between skew axes (and intersecting axes as a special case). Analytical derivations demonstrate the theoretical possibility of involute profiles transmitting motion between skew axes through line contact and, perihaps more importantly, they lead to apparently novel geometric designs featuring insensitivity of transmission ratio to all misalignments within relatively large limits. The theoretical developments are confirmed by various numerical examples.
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Reports on the topic "Corrective surface"

1

K. Campbell. Corrective Action Plan for Corrective Action Unit 417: Central Nevada Test Area Surface, Nevada. Office of Scientific and Technical Information (OSTI), 2000. http://dx.doi.org/10.2172/777463.

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Alfred Wickline. Corrective Action Investigation plan for Corrective Action Unit 546: Injection Well and Surface Releases, Nevada Test Site, Nevada, Revision 0. Office of Scientific and Technical Information (OSTI), 2008. http://dx.doi.org/10.2172/926232.

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K. B. Campbell. Closure Report for Corrective Action Unit 417: Central Nevada Test Area Surface, Nevada. Office of Scientific and Technical Information (OSTI), 2001. http://dx.doi.org/10.2172/797147.

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Grant Evenson. Corrective Action Investigation Plan for Corrective Action Unit 556: Dry Wells and Surface Release Points Nevada Test Site, Nevada (Draft), Revision 0. Office of Scientific and Technical Information (OSTI), 2007. http://dx.doi.org/10.2172/900621.

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Wickline, Alfred. Corrective Action Decision Document/Closure Report for Corrective Action Unit 546: Injection Well and Surface Releases Nevada Test Site, Nevada, Revision 0. Office of Scientific and Technical Information (OSTI), 2008. http://dx.doi.org/10.2172/946801.

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Evenson, Grant. Corrective Action Decision Document/ Closure Report for Corrective Action Unit 556: Dry Wells and Surface Release Points, Nevada Test Site, Nevada with Errata Sheet, Revision 0. Office of Scientific and Technical Information (OSTI), 2008. http://dx.doi.org/10.2172/939196.

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Bechel Nevada. Streamlined Approach for Environmental Restoration Plan for Corrective Action Unit 484: Surface Debris, Waste Sites, and Burn Area, Tonopah Test Range, Nevada. Office of Scientific and Technical Information (OSTI), 2004. http://dx.doi.org/10.2172/831230.

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Mark Burmeister. Addendum to the Closure Report for Corrective Action Unit 484: Surface Debris, Waste Sites, and Burn Area, Tonopah Test Range, Nevada (Revision 0). Office of Scientific and Technical Information (OSTI), 2011. http://dx.doi.org/10.2172/1010515.

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BECHTEL NEVADA and NNSA NEVADA SITE OFFICE. POST CLOSURE INSPECTION AND MONITORING REPORT FOR CORRECTIVE ACTION UNIT 417: CENTRAL NEVADA TEST AREA - SURFACE, HOT CREEK VALLEY, NEVADA, FOR CALENDAR YEAR 2004. Office of Scientific and Technical Information (OSTI), 2005. http://dx.doi.org/10.2172/850249.

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Henmi, Teizi. Nowcasting Surface Meteorological Parameters Using Successive Correction Method. Defense Technical Information Center, 2002. http://dx.doi.org/10.21236/ada410433.

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