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Journal articles on the topic 'Calibrations and calibrated geometries'

Author: Grafiati

Published: 4 June 2021

Last updated: 28 July 2025

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1

Zhang, Fan, Di Liu, Aibing Liu, Xianyue Gang, and Lijun Li. "Numerical Study on the Phase Sensitivity Variation in Low Frequency Primary Microphone Calibrations." Applied Sciences 10, no. 11 (2020): 3799. http://dx.doi.org/10.3390/app10113799.

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The low frequency phase characteristics of microphones in a monitoring system are crucial for characterizing large-scale natural and artificial activities—e.g., earthquakes, nuclear explosions, or rocket launchings. At present, microphones are simultaneously calibrated using in-situ or calibrator methods to get their phase consistency. However, the essential primary calibration, which traces their phase sensitivity to basic physical quantities, is grossly overlooked. Recently, we speculated that the microphone phase sensitivity is acoustically controlled by the pressure leakage and heat conduc

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Cortis, Gabriele, and Luca Cortese. "Effective Ductile Fracture Characterization of 17-4PH and Ti6Al4V by Shear–Tension Tests: Experiments and Damage Models Calibration." Applied Sciences 15, no. 7 (2025): 3645. https://doi.org/10.3390/app15073645.

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An experimental campaign based on multiaxial tests is carried out to characterize the ductile behavior of 17-4PH steel and a Ti6Al4V titanium alloy, and to calibrate numerical ductile damage models, accordingly. This study aimed to identify a minimal set of four specimen types to ensure the robust tuning of the damage models, using only a conventional uniaxial machine for testing. Two different shear–tension candidate geometries are identified, modified, and used together with cylindrical and notched bar specimens to evaluate material plastic strain at fracture under several stress states, cha

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3

Lourenço, Bernardo, Tiago Madeira, Paulo Dias, Vitor M. Ferreira Santos, and Miguel Oliveira. "2D lidar to kinematic chain calibration using planar features of indoor scenes." Industrial Robot: the international journal of robotics research and application 47, no. 5 (2020): 647–55. http://dx.doi.org/10.1108/ir-09-2019-0201.

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Purpose 2D laser rangefinders (LRFs) are commonly used sensors in the field of robotics, as they provide accurate range measurements with high angular resolution. These sensors can be coupled with mechanical units which, by granting an additional degree of freedom to the movement of the LRF, enable the 3D perception of a scene. To be successful, this reconstruction procedure requires to evaluate with high accuracy the extrinsic transformation between the LRF and the motorized system. Design/methodology/approach In this work, a calibration procedure is proposed to evaluate this transformation.

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Valdelomar, Pedro, José L. Gómez-Amo, Caterina Peris-Ferrús, Francesco Scarlatti, and María Pilar Utrillas. "Feasibility of Ground-Based Sky-Camera HDR Imagery to Determine Solar Irradiance and Sky Radiance over Different Geometries and Sky Conditions." Remote Sensing 13, no. 24 (2021): 5157. http://dx.doi.org/10.3390/rs13245157.

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We propose a methodological approach to provide the accurate and calibrated measurements of sky radiance and broadband solar irradiance using the High Dynamic Range (HDR) images of a sky-camera. This approach is based on a detailed instrumental characterization of a SONA sky-camera in terms of image acquisition and processing, as well as geometric and radiometric calibrations. As a result, a 1 min time resolution database of geometrically and radiometrically calibrated HDR images has been created and has been available since February 2020, with daily updates. An extensive validation of our rad

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Milosevic, Marko D. G., Björn A. Pålsson, Arne Nissen, Jens C. O. Nielsen, and Håkan Johansson. "Condition Monitoring of Railway Crossing Geometry via Measured and Simulated Track Responses." Sensors 22, no. 3 (2022): 1012. http://dx.doi.org/10.3390/s22031012.

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This paper presents methods for continuous condition monitoring of railway switches and crossings (S&C, turnout) via sleeper-mounted accelerometers at the crossing transition. The methods are developed from concurrently measured sleeper accelerations and scanned crossing geometries from six in situ crossing panels. These measurements combined with a multi-body simulation (MBS) model with a structural track model and implemented scanned crossing geometries are used to derive the link between the crossing geometry condition and the resulting track excitation. From this analysis, a crossing c

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Zelder, T., B. Geck, I. Rolfes, and H. Eul. "Usage of the contactless vector network analysis with varying transmission line geometries." Advances in Radio Science 6 (May 26, 2008): 19–25. http://dx.doi.org/10.5194/ars-6-19-2008.

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Abstract. The scattering parameters of embedded devices can be measured by means of contactless vector network analysis. To achieve accurate measurement results, the contactless measurement setup has to be calibrated. However, if the substrate material or the planar transmission lines on the substrate changes, a new calibration is necessary. In this paper a method will be examined, which reduces the number of calibration cycles by using a database. Analytical results show that by using this database method, errors occur which depend on the coupling coefficients and on the load impedances of th

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Cascioli, Gael, Erwan Mazarico, Flavio Petricca, et al. "The Effect of the Io Plasma Torus on Precise Orbit Determination and Gravity Recovery: Application to Europa Clipper." Planetary Science Journal 6, no. 5 (2025): 129. https://doi.org/10.3847/psj/add012.

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Abstract The neutral gases released by the intense volcanic activity of the Jupiter moon Io, once ionized by the Jupiter magnetic environment, give rise to a toroidal plasma distribution known as the Io plasma torus (IPT). Radio signals passing through charged-particle environments such as the IPT are heavily perturbed proportionally to the rate of change of the charged-particle distribution along the path of the radio wave. If not properly calibrated, the IPT may induce significant perturbation on the radiometric tracking link to Earth. The radio tracking signal is the main observable for the

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Humm, H. J., C. R. Gossweiler, and G. Gyarmathy. "On Fast-Response Probes: Part 2—Aerodynamic Probe Design Studies." Journal of Turbomachinery 117, no. 4 (1995): 618–24. http://dx.doi.org/10.1115/1.2836580.

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The influence of the probe size and geometry on the quality of fast-response measurements in turbomachines has been experimentally investigated. For investigations in the static domain (time-independent flows) probes were calibrated in two continuously operating wind tunnels in the range 0.2 < M < 1.2. For dynamic calibrations in time-variant flows model experiments in water (0.025 < k < 0.4, reduced frequency) were performed. Aerodynamic characteristics were determined for a great number of probe geometries, such as circular cylinders and wedge-type probes with varied apex angles,

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Dong, Jiadan, Yepei Chen, Xiaoling Chen, and Qiangqiang Xu. "Radiometric Cross-Calibration of Wide-Field-of-View Cameras Based on Gaofen-1/6 Satellite Synergistic Observations Using Landsat-8 Operational Land Imager Images: A Solution for Off-Nadir Wide-Field-of-View Associated Problems." Remote Sensing 15, no. 15 (2023): 3851. http://dx.doi.org/10.3390/rs15153851.

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The Gaofen-1 satellite is equipped with four wide-field-of-view (WFV) instruments, enabling an impressive spatial resolution of 16 m and a combined swath exceeding 800 km. These WFV images have shown their valuable applications across diverse fields. However, achieving accurate radiometric calibration is an essential prerequisite for establishing reliable connections between satellite signals and biophysical, as well as biochemical, parameters. However, observations with large viewing angles (>20°) pose new challenges due to the bidirectional reflectance distribution function (BRDF) effect

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Manasrah, Ahmad, Yousef Jaradat, Mohammad Masoud, Mohammad Alia, Khaled Suwais, and Piero Bevilacqua. "Flat vs. Curved: Machine Learning Classification of Flexible PV Panel Geometries." Energies 18, no. 13 (2025): 3529. https://doi.org/10.3390/en18133529.

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As the global demand for clean and sustainable energy grows, photovoltaics (PVs) have become an important technology in this industry. Thin-film and flexible PV modules offer noticeable advantages for irregular surface mounts and mobile applications. This study investigates the use of four machine learning models to detect different flexible PV module geometries based on power output data. Three identical flexible PV modules were mounted in flat, concave, and convex configurations and connected to batteries via solar chargers. The experimental results showed that all geometries fully charged t

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Watanabe, Mari, Kazuya Matsuzaki, Osamu Sato, Yoshiya Fukuhara, and Masato Terasawa. "Feasibility Study of Performance Assessment Gauge for Freeform Measurement." International Journal of Automation Technology 15, no. 6 (2021): 824–30. http://dx.doi.org/10.20965/ijat.2021.p0824.

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Recent product components have been designed as a combination of complex forms for advanced functionality. Such high degree-of-freedom forms are shaped by various manufacturing processes. In the industrial supply chain, the deviation of a manufactured form from its designed form must be verified to ensure product quality. Three-dimensional (3D) measuring systems are typically used for verification. To validate the product manufacturing performance accurately, a measurement procedure that can derive the measurands of forms with small measurement uncertainty is necessitated. For simple geometrie

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Sun, Peng, Nai-Guang Lu, Ming-Li Dong, Bi-Xi Yan, and Jun Wang. "Simultaneous All-Parameters Calibration and Assessment of a Stereo Camera Pair Using a Scale Bar." Sensors 18, no. 11 (2018): 3964. http://dx.doi.org/10.3390/s18113964.

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Highly accurate and easy-to-operate calibration (to determine the interior and distortion parameters) and orientation (to determine the exterior parameters) methods for cameras in large volume is a very important topic for expanding the application scope of 3D vision and photogrammetry techniques. This paper proposes a method for simultaneously calibrating, orienting and assessing multi-camera 3D measurement systems in large measurement volume scenarios. The primary idea is building 3D point and length arrays by moving a scale bar in the measurement volume and then conducting a self-calibratin

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Liu, Xiaoyu, Tong Wang, and Jinming Chen. "Identifiability Analysis for Configuration Calibration in Distributed Sensor Networks." Remote Sensing 14, no. 16 (2022): 3920. http://dx.doi.org/10.3390/rs14163920.

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In this work, the parameter identifiability of sensor position perturbations in a distributed network is analyzed through establishing the link between rank of the Jacobian matrix and parameter identifiability under Gaussian noise. Here, the calibration is classified as either external or internal, dependent on whether auxiliary sources are exploited. It states that, in the case of internal calibration, sensor position perturbations can be precisely calibrated when the position of a sensor and orientation to a second sensor along with the coordinate of a third sensor along some axis, are known

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Campagnolo, Alberto, Giovanni Meneghetti, Vittorio Babini, Matteo Riboli, and Andrea Spagnoli. "Multiaxial fatigue assessment of welded steel details according to the peak stress method based on tetra elements." MATEC Web of Conferences 300 (2019): 19002. http://dx.doi.org/10.1051/matecconf/201930019002.

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The Peak Stress Method (PSM) is an engineering, FE-oriented application of the notch stress intensity factor (NSIF) approach to fatigue design of welded joints, which takes advantage of the singular linear elastic peak stresses from FE analyses with coarse meshes. Originally, the PSM was calibrated by using 3D, eight-node brick elements, taking advantage of the submodeling technique. Recently, the PSM has been calibrated by using ten-node tetra elements, which are able to directly discretize complex 3D geometries without the need for submodels. The PSM was validated for pure axial or bending l

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Alhalaybeh, Thamer Sami, Ashiq Iqbal Chowdhury, Hammad Akhtar, and Yanshan Lou. "Ductile Fracture Prediction in Mg-ZM51M Alloy Using Inverse-Calibrated Damage Models." Metals 15, no. 7 (2025): 722. https://doi.org/10.3390/met15070722.

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Magnesium (Mg) alloys are gaining widespread use in the automotive and construction industries for their potential to enhance performance and lower manufacturing costs, making them ideal for lightweight structural applications. However, despite these advantages, extruding Mg alloys remains technically challenging due to their inherently limited formability and the strong crystallographic textures that form during deformation. This study aimed to comprehensively characterize the ductile fracture behavior of ZM51M Mg alloy round bars under various stress states and to improve the reliability of

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Wagner, Thomas, Steffen Beirle, Julia Remmers, Reza Shaiganfar, and Yang Wang. "Absolute calibration of the colour index and O<sub>4</sub> absorption derived from Multi AXis (MAX-)DOAS measurements and their application to a standardised cloud classification algorithm." Atmospheric Measurement Techniques 9, no. 9 (2016): 4803–23. http://dx.doi.org/10.5194/amt-9-4803-2016.

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Abstract. A method is developed for the calibration of the colour index (CI) and the O4 absorption derived from differential optical absorption spectroscopy (DOAS) measurements of scattered sunlight. The method is based on the comparison of measurements and radiative transfer simulations for well-defined atmospheric conditions and viewing geometries. Calibrated measurements of the CI and the O4 absorption are important for the detection and classification of clouds from MAX-DOAS observations. Such information is needed for the identification and correction of the cloud influence on Multi AXis

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Kane, Seamus P., and William F. Northrop. "A Quasi-Dimensional Model of Heat Transfer between Multi-Concentric Monolith Structures." Thermo 3, no. 4 (2023): 515–36. http://dx.doi.org/10.3390/thermo3040031.

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Metallic monolith structures are often used in compact reactor applications due to their superior heat transfer properties and lower pressure drop when compared to ceramic monoliths. Endothermic reactions like steam reforming depend heavily on externally supplied heat, making highly conductive supports especially useful. Simulations are invaluable for designing effective reactors with complex catalyst support structures but are conventionally resource-intensive. Additionally, few dedicated heat transfer experiments between monoliths exist in prior literature. To expand general knowledge of hea

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Bhark, E., A. Rey, A. Datta-Gupta, and B. Jafarpour. "A Multiscale Workflow for History Matching in Structured and Unstructured Grid Geometries." SPE Journal 17, no. 03 (2012): 828–48. http://dx.doi.org/10.2118/141764-pa.

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Summary We present the development and field application of a workflow for multiscale reservoir-model calibration that seamlessly integrates production data into the reservoir description from the facies to the grid-cell scale. To start with, the permeability field is parameterized using a novel grid-connectivity-based transformation basis that can be applied with any model geometry, including unstructured and corner-point grids. The parameterization basis functions emerge from spectral decomposition of the grid-connectivity Laplacian and are related to the structural harmonics of the grid. To

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Asgari, Afrouz, Mansour Ashoor, Leila Sarkhosh, Abdollah Khorshidi, and Parvaneh Shokrani. "Determination of Gamma Camera’s Calibration Factors for Quantitation of Diagnostic Radionuclides in Simultaneous Scattering and Attenuation Correction." Current Radiopharmaceuticals 12, no. 1 (2019): 29–39. http://dx.doi.org/10.2174/1874471011666180914095222.

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Objective: The characterization of cancerous tissue and bone metastasis can be distinguished by accurate assessment of accumulated uptake and activity from different radioisotopes. The various parameters and phenomena such as calibration factor, Compton scattering, attenuation and penetration intrinsicallyinfluence calibration equation, and the qualification of images as well. Methods: The camera calibration factor (CF) translates reconstructed count map into absolute activity map, which is determined by both planar and tomographic scans using different phantom geometries. In this study, the C

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Weiss, Gregory G., and Steven D. Glaser. "Design and Absolute Calibration of an Embedded, Wideband Velocity Sensor." Transportation Research Record: Journal of the Transportation Research Board 1614, no. 1 (1998): 43–51. http://dx.doi.org/10.3141/1614-06.

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A unique embeddable high-fidelity transducer is introduced here, presenting design parameters and National Institute of Standards and Technology (NIST) calibration. Traditionally, acoustic emission studies are conducted by placing an array of sensors on the surface of the specimen being tested, but the physical constraints of many practical testing geometries preclude surface placement of sensors. Advantages of embedded sensors include the following: ( a) mode conversion is avoided so the measured waveforms are simpler and easier to interpret; ( b) the sensor(s) can be located close to the are

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Peteinaris, A., O. Haftka, and Alexandros Terzis. "An alternative post-processing of transient liquid crystal experiments using the wall temperature gradient time response." Journal of Physics: Conference Series 2511, no. 1 (2023): 012027. http://dx.doi.org/10.1088/1742-6596/2511/1/012027.

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Abstract An alternative method for the fast evaluation of transient liquid crystal experiments is presented in this study. The calibration of liquid crystals has been considered essential to obtain accurate heat transfer measurements. Nevertheless, liquid crystal aging, illumination, and ex situ calibration effects remain a difficult and might influence the heat transfer level. Proposed here is to bypass liquid crystal calibration by utilizing the evolution of the wall temperature gradients. This necessitates the use of the detection times of the maximum red and green intensities of narrow ban

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Faircloth, Billie, Ryan Welch, Martin Tamke, et al. "Multiscale modeling frameworks for architecture: Designing the unseen and invisible with phase change materials." International Journal of Architectural Computing 16, no. 2 (2018): 104–22. http://dx.doi.org/10.1177/1478077118778599.

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Multiscale design and analysis models promise a robust, multimethod, multidisciplinary approach, but at present have limited application during the architectural design process. To explore the use of multiscale models in architecture, we develop a calibrated modeling and simulation platform for the design and analysis of a prototypical envelope made of phase change materials. The model is mechanistic in nature, incorporates material-scale and precinct scale-attributes, and supports the design of two- and three-dimensional phase change material geometries informed by heat transfer phenomena. Ph

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Schlienger, Joel, Axel Pfau, Anestis I. Kalfas, and Reza S. Abhari. "Single pressure transducer probe for 3D flow measurements." E3S Web of Conferences 345 (2022): 01012. http://dx.doi.org/10.1051/e3sconf/202234501012.

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A new method of measuring 3D flow with a single pressure transducer mounted inside the head of a single probe is presented in this paper. The 3D flow field around the hemispherical or ellipsoidal probe head is used to derive the 3D flow vector in virtual 5-sensor mode. A pressure tap located in the vicinity of the probe head connects the instantaneous pressure of the measurement volume to the pressure transducer. By turning the probe to five different positions around the axis of the stem, a set of five pressures is formed. The relevant flow parameters such as total and static pressure, yaw an

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Campagnolo, Alberto, and Giovanni Meneghetti. "Rapid estimation of notch stress intensity factors in 3D large-scale welded structures using the peak stress method." MATEC Web of Conferences 165 (2018): 17004. http://dx.doi.org/10.1051/matecconf/201816517004.

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The Peak Stress Method (PSM) is an engineering, FE-oriented application of the notch stress intensity factor (NSIF) approach to fatigue design of welded joints, which takes advantage of the singular linear elastic peak stresses from FE analyses with coarse meshes. Originally, the PSM was calibrated to rapidly estimate the NSIFs by using 3D, eight-node brick elements, taking advantage of the submodeling technique. 3D modelling of large-scale structures is increasingly adopted in industrial applications, thanks to the growing spread of high-performance computing (HPC). Based on this trend, the a

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Mildren, S. D., R. R. Hillis, and J.Kaldi. "CALIBRATING PREDICTIONS OF FAULT SEAL REACTIVATION IN THE TIMOR SEA." APPEA Journal 42, no. 1 (2002): 187. http://dx.doi.org/10.1071/aj01011.

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Predictions of the likelihood of fault reactivation for five fault-bound prospects in the Timor Sea are made using the FAST (Fault Analysis Seal Technology) technique. Fault reactivation is believed to be the dominant cause of seal breach in the area. Calculations are made using a stress tensor appropriate for the area, a conservative fault-rock failure envelope and the structural geometries of each prospect. A depth-stress power relationship defines the vertical stress magnitude based on vertical stress profiles for 17 Timor Sea wells.Empirical evidence of hydrocarbon leakage at each trap is

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Inomata, Chiharu, Masahide Kuwata, Sho Yokota, et al. "Model position sensing method for low fineness ratio models in a magnetic suspension and balance system." Review of Scientific Instruments 94, no. 2 (2023): 025102. http://dx.doi.org/10.1063/5.0113806.

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A new model-position-sensing method for the levitation of models with a low fineness ratio (ratio of the longitudinal length to the diameter) in a magnetic suspension and balance system (MSBS) is proposed. MSBS is an ideal model-support device for wind-tunnel testing, which enables the study of flow fields around blunt bodies without flow disturbances introduced by mechanical support devices, with the aerodynamic forces determined from the magnetic forces using a pre-calibrated relationship. The new method allows wind tunnel experiments without mechanical supports with a low fineness ratio mod

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Figueiredo Junior, Heber, Roger Matsumoto Moreira, and Pedro Bastos Costa. "Discontinuity measurement uncertainty evaluation using the Feeler PIG." International Journal of Metrology and Quality Engineering 13 (2022): 15. http://dx.doi.org/10.1051/ijmqe/2022017.

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The Feeler PIG is equipment that uses a geometric sensor to carry out the internal inspection of piping of different sizes. Several experiments on laboratory benches were carried out to evaluate the measuring accuracy of the Feeler PIG, considering a rotating metallic disk with discontinuities machined in its body and a single sensor for the detection of defects. The present work aims to study the measurement uncertainties with the Feeler PIG, through a laboratory experiment, comparing the results found by the device measurements, in a pipe with a nominal diameter of 6” in PVC, with synthetic

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Yerosan, Abera Hirpessa, and Ing. Dereje Hailu Dr. "ASSESSMENT OF FAILURE ON DRAINAGE STRUCTURES ALONG THE ETHIOPIAN NATIONAL RAILWAY LINE OF SEBETA-MIESO (CASE STUDY OF AKAKI RIVER CROSSING DRAINAGE STRUCTURE)." International Journal of Research - Granthaalayah 7, no. 9 (2019): 123–37. https://doi.org/10.5281/zenodo.3464398.

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A railway drainage system gives vital role for effective, efficient operation of rail track. This study worked on an assessment of railway drainage system problem along the Addis Ababa- Mieso railway line, specifically on Akaki rives crossing. It was done to check adequacy of hydraulic structure provided on Akaki River crossing by undertaking hydrologic and hydraulic analysis. Hydrologic modeling of the Akaki catchment area was developed by HEC-GeoHMS program with the help of Arc-GIS and hydrologic analysis was computed by HEC-HMS program. The catchment land use, soil type, rainfall data, Akak

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Prisăcariu, Emilia-Georgiana, and Tudor Prisecaru. "Quantitative Color Schlieren for an H2–O2 Exhaust Jet Developing in Air." Fluids 9, no. 1 (2024): 19. http://dx.doi.org/10.3390/fluids9010019.

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Throughout many decades, the Schlieren visualization method has been mainly used as means to visualize transparent flows in a qualitative manner. The images recorded provide data regarding the existence of the flow, or illustrate predicted flow geometries and details. The colored Schlieren method has been developed in the late 1890s and has always had the intent to provide quantitative data rather than qualitative pictures of the studied phenomena. This paper centers on applying a quantitative color Schlieren method to help determine the gasodynamic parameters of an H2–O2 exhaust jet, developi

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Chernyshikhin, Stanislav V., Denis G. Firsov, and Igor V. Shishkovsky. "Selective Laser Melting of Pre-Alloyed NiTi Powder: Single-Track Study and FE Modeling with Heat Source Calibration." Materials 14, no. 23 (2021): 7486. http://dx.doi.org/10.3390/ma14237486.

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Unique functional properties such as the low stiffness, superelasticity, and biocompatibility of nickel–titanium shape-memory alloys provide many applications for such materials. Selective laser melting of NiTi enables low-cost customization of devices and the manufacturing of highly complex geometries without subsequent machining. However, the technology requires optimization of process parameters in order to guarantee high mass density and to avoid deterioration of functional properties. In this work, the melt pool geometry, surface morphology, formation mode, and thermal behavior were studi

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Angelopoulou, V., E. Kouvaris, V. Lagaki, T. J. Mertzimekis та P. Papagiannis. "Resurrected from the dead: Full characterization of an old HPGe detector using γ-ray and CT tomographies coupled to standard calibration techniques and simulations". HNPS Proceedings 24 (1 квітня 2019): 174. http://dx.doi.org/10.12681/hnps.1862.

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A decommissioned co-axial HPGe detector has been recently acquired and returned to operational mode in an effort to build an environmental radiation spectrometer at the University of Athens. The new counting station, GEROS (Germanium for Environmental RadiOactivity Studies), was fully characterized prior to operation to obtain detailed information on its linear response, efficiency and energy resolution. In addition to using point-like calibration sources (60Co,137Cs,152Eu and 226Ra), several bulk sample geometries were calibrated by means of an IAEA standard, focusing on soils, sediments and

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Zhu, Mengyao, Aimei Zhao, Lili Qie, et al. "The Accuracy Analysis of Satellite In-flight Absolute Calibration using Rayleigh Scattering Over Ocean." Journal of Physics: Conference Series 3055, no. 1 (2025): 012031. https://doi.org/10.1088/1742-6596/3055/1/012031.

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Abstract The Rayleigh scattering over the ocean is one of the most widely used natural scenes for satellite in-flight absolute calibration of the short visible band. The accuracy of calibration relies on the accuracy of the simulated radiance at the top of the atmosphere (TOA). In this study the TOA radiance simulation error is systematically investigated under various solar-viewing geometries. Its sensitivity to atmospheric and oceanic parameters is quantitatively evaluated in detail, including aerosol optical depth (AOD), aerosol model (AM), wind speed (WS), absorbing gases (column water vap

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Peng, Qing, Guangyu Wang, Gui-Rong Liu, and Suvranu De. "Van der Waals Density Functional Theory vdW-DFq for Semihard Materials." Crystals 9, no. 5 (2019): 243. http://dx.doi.org/10.3390/cryst9050243.

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There are a large number of materials with mild stiffness, which are not as soft as tissues and not as strong as metals. These semihard materials include energetic materials, molecular crystals, layered materials, and van der Waals crystals. The integrity and mechanical stability are mainly determined by the interactions between instantaneously induced dipoles, the so called London dispersion force or van der Waals force. It is challenging to accurately model the structural and mechanical properties of these semihard materials in the frame of density functional theory where the non-local corre

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Roy, G., D. Vo-Ngoc, D. N. Nguyen, and P. Florent. "Behavior of Radial Incompressible Flow in Pneumatic Dimensional Control Systems." Journal of Fluids Engineering 125, no. 5 (2003): 843–50. http://dx.doi.org/10.1115/1.1598991.

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The application of pneumatic metrology to control dimensional accuracy on machined parts is based on the measurement of gas flow resistance through a restricted section formed by a jet orifice placed at a small distance away from a machined surface. The backpressure, which is sensed and indicated by a pressure gauge, is calibrated to measure dimensional variations. It has been found that in some typical industrial applications, the nozzles are subject to fouling, e.g., dirt and oil deposits accumulate on their frontal areas, thus requiring more frequent calibration of the apparatus for reliabl

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Shragge, Jeffrey, David Lumley, Julien Bourget, et al. "The Western Australia Modeling project — Part 2: Seismic validation." Interpretation 7, no. 4 (2019): T793—T807. http://dx.doi.org/10.1190/int-2018-0218.1.

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Large-scale 3D modeling of realistic earth models is being increasingly undertaken in industry and academia. These models have proven useful for various activities such as geologic scenario testing through seismic finite-difference (FD) modeling, investigating new acquisition geometries, and validating novel seismic imaging, inversion, and interpretation methods. We have evaluated the results of the Western Australia (WA) Modeling (WAMo) project, involving the development of a large-scale 3D geomodel representative of geology of the Carnarvon Basin, located offshore of WA’s North West Shelf (N

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Price, Neil, Paul LaPointe, Kevin Parmassar, et al. "Dynamic calibration of the Shaikan Jurassic full-field fractured reservoir model through single-well DST and multi-well interference discrete fracture network simulation." Journal of the Geological Society 177, no. 6 (2020): 1294–314. http://dx.doi.org/10.1144/jgs2019-137.

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The hydraulic behaviour of the fractures in a fractured carbonate reservoir is a function of fracture intensity, aperture, intrinsic permeability, length, height and orientation, all of which influence the scale of connectivity and ultimately storage, productivity and reserves. If a geologically realistic fracture model is not appropriately incorporated into upscaled fracture properties for a dynamic simulation, it may still be possible to match a short production history, but calculations of field-wide fracture pore volumes and forecasts of future reservoir development may be poor and uncerta

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Maxim, Daniel Iosif, Liviu Marşavina, and Mircea Cristian Dudescu. "Calibration of a Shear Specimen." Solid State Phenomena 254 (August 2016): 138–43. http://dx.doi.org/10.4028/www.scientific.net/ssp.254.138.

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Different geometries of shear test specimens were experimentally and numerically investigated. They are used for calibration of a virtual model, to be used for sheet metal blanking. Different specimen configurations were simulated in order to determine the strain and stress fields and the potential of producing pure shear failure. Tensile and shear tests were performed using DC01 steel material. The experimental data are used later to calibrate a material with Johnson-Cook elastic-plastic model.

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Caplins, Benjamin. "(Invited) The Importance of Characterizing and Calibrating Light Engines in Vat Photopolymerization Additive Manufacturing." ECS Meeting Abstracts MA2023-01, no. 22 (2023): 1588. http://dx.doi.org/10.1149/ma2023-01221588mtgabs.

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Vat photopolymerization (VP) is an additive manufacturing technique that uses spatially patterned light to cure liquid resins into solid materials. As an additive manufacturing technique, parts with complex geometries can be manufactured that would not be possible with conventional techniques. Large scale VP has found wide adoption by a range of industries including automotive, dental, consumer goods, and prototyping. On a smaller scale, hobbyist level users have found innumerable uses for VP and this market, in particular, has fueled the development of a plethora of low-cost printers. Common

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Arroyo, Borja, Laura Andrea, José A. Álvarez, Sergio Cicero, Federico Gutiérrez-Solana, and Luis Abarca. "Small Punch Test to Estimate the Threshold Stress in Aggressive Environments by Incremental Step Loading." Metals 14, no. 11 (2024): 1234. http://dx.doi.org/10.3390/met14111234.

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The present work is a relevant advance in the validation of the incremental step loading technique (ASTM F1624 standard) when applied to Small Punch tests (SPT) for the threshold load determination of medium- and high-strength steels in aggressive environments, as a novel alternative to conventional time-consuming tests under constant load. It completes previous works by the authors on this topic, extending a methodology to estimate the threshold stress from SPT tests in aggressive environments, covering the whole range of hardness marked by ASTM F1624 as the main goal. This is achieved by cal

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Norwood, F. Bailey. "Can Calibration Reconcile Stated and Observed Preferences?" Journal of Agricultural and Applied Economics 37, no. 1 (2005): 237–48. http://dx.doi.org/10.1017/s1074070800007227.

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Hypothetical bias is a pervasive problem in stated-preference experiments. Recent research has developed two empirically successful calibrations to remove hypothetical bias, though the calibrations have not been tested using the same data or in a conjoint analysis. This study compares the two calibrations in a conjoint analysis involving donations to a public good. Results find the calibrations are biased predictors of true donations but that calibrated and uncalibrated models together provide upper and lower bounds to true donations.

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Gauntlett, Jerome P., Neil D. Lambert, and Peter C. West. "Branes and Calibrated Geometries." Communications in Mathematical Physics 202, no. 3 (1999): 571–92. http://dx.doi.org/10.1007/s002200050596.

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Malimon, Z., T. Vinokurova, V. Salata, H. Kochetova, T. Prokopenko, and L. Gusak. "Control quality measurements of alpha and beta counter with low back-ground ALBA 2000 v.2.5.6." Scientific Messenger of LNU of Veterinary Medicine and Biotechnologies 24, no. 106 (2022): 18–21. http://dx.doi.org/10.32718/nvlvet10603.

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The article provides a systematic approach to quality control of measurements of total alpha-and beta-activity using a counter with a low background ALPHA / BETA COUNTING SYSTEM ALBA (mod. ALBA / LLAB) and software ALBA 2000 v.2.5.6. The purpose is to determine the compliance of these objects with the requirements of regulatory documentation. The spectrometry method is based on the physical concentration of radionuclides from the sample volume, measuring the rate of alpha, and beta radiation of the obtained dry residue of the sample, comparing the sample count rate with calibration values of a

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Petitprez, B., P. Silvestre, P. Valenza, A. Boulore, and T. David. "Development of a new bench for puncturing of irradiated fuel rods in STAR hot laboratory." EPJ Web of Conferences 170 (2018): 05004. http://dx.doi.org/10.1051/epjconf/201817005004.

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A new device for puncturing of irradiated fuel rods in commercial power plants has been designed by Fuel Research Department of CEA Cadarache in order to provide experimental data of high precision on fuel pins with various designs. It will replace the current set-up that has been used since 1998 in hot cell 2 of STAR facility with more than 200 rod puncturing experiments. Based on this consistent experimental feedback, the heavy-duty technique of rod perforation by clad punching has been preserved for the new bench. The method of double expansion of rod gases is also retained since it allows

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BANGERT, VICTOR, and XIAOJUN CUI. "Calibrations and laminations." Mathematical Proceedings of the Cambridge Philosophical Society 162, no. 1 (2016): 151–71. http://dx.doi.org/10.1017/s0305004116000475.

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AbstractA calibration of degree k ∈ ℕ on a Riemannian manifold M is a closed differential k-form θ such that the integral of θ over every k-dimensional, oriented submanifold N is smaller or equal to the Riemannian volume of N. A calibration θ is said to calibrate N if θ restricts to the oriented volume form of N. We investigate conditions on a calibration θ that ensure the existence of submanifolds calibrated by θ. The cases k = 1 and k > 1 turn out to be essentially different. Our main result says that, on a compact manifold M, a calibration θ calibrates a lamination if θ is simple, of cla

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Floerchinger, Gus, Chris Cadigan, Neal P. Sullivan, and Rob J. Braun. "Characterizing the Performance of kW-Scale Multi-Stack Solid Oxide Fuel Cell Modules through Modeling." ECS Meeting Abstracts MA2023-01, no. 54 (2023): 125. http://dx.doi.org/10.1149/ma2023-0154125mtgabs.

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Commercial-scale SOFC systems are comprised of power modules that contain multiple SOFC stacks. In the last decade, there has been much work on individual SOFC stack development and SOFC systems at the commercial scale (100-1000 kWe). Development of these commercial systems often utilizes models of a single representative SOFC stack to simulate the system’s prime mover. In practice, however, these representative single-stack SOFC models fail to consider the effects that arise due to the reality of multi-stack power modules used to construct commercial scale systems. Effects such as flow maldis

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Colgáin, Eoin Ó. "Holographic Entanglement Entropy, SUSY & Calibrations." EPJ Web of Conferences 168 (2018): 03003. http://dx.doi.org/10.1051/epjconf/201816803003.

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Holographic calculations of entanglement entropy boil down to identifying minimal surfaces in curved spacetimes. This generically entails solving second-order equations. For higher-dimensional AdS geometries, we demonstrate that supersymmetry and calibrations reduce the problem to first-order equations. We note that minimal surfaces corresponding to disks preserve supersymmetry, whereas strips do not.

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Keyser, D. R. "The Systematic Uncertainty of Laboratory Flow Calibrations." Journal of Fluids Engineering 120, no. 1 (1998): 19–22. http://dx.doi.org/10.1115/1.2819647.

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There are two axioms applicable to this paper: the first is that no flowmeter can be more accurate than the laboratory which calibrated it; the second that no uncalibrated flowmeter can be more accurate than a like one that is calibrated in a recognized standards laboratory. The fundamental systematic uncertainty in flow measurement is that inherited from the flow calibration laboratory. This paper focuses on ascertaining this fundamental systematic uncertainty by deriving from the published instances of interlaboratory comparisons a value in which one may be 95 percent confident. For water fl

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Gluck, Herman, Frank Morgan, and Wolfgang Ziller. "Calibrated geometries in Grassmann manifolds." Commentarii Mathematici Helvetici 64, no. 1 (1989): 256–68. http://dx.doi.org/10.1007/bf02564674.

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Rufener, F. "Approaches to Photometric Calibrations." Symposium - International Astronomical Union 111 (1985): 253–69. http://dx.doi.org/10.1017/s0074180900078888.

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In this review an examination will be made of the experimental conditions which must be satisfied by multicolor photometric systems if the observational parameters are to be correlated unequivocally with physical quantities of the star. An inventory of error sources disturbing such calibrations contains: instability of the natural system, procedures of observation and reduction to outside the atmosphere and correlation with a standard system. The requirements desirable for the preparation of lists of standard stars, for the definition of the pass bands, for the “orthogonality” of the calibrate

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Denisenko, S. А., F. V. Bulygin, A. N. Pankov, A. V. Chernova, M. Prilepko, and E. A. Tkachenko. "Method for estimating the number of calibrations of measuring instruments used in production activities." Izmeritel`naya Tekhnika 73, no. 8 (2024): 69–79. http://dx.doi.org/10.32446/0368-1025it.2024-8-69-79.

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A method for estimating the number of calibrations of measuring instruments used in production activities on the scale of the state economy is proposed and justified. The method is based on the calculation of the so–called calibration weight – the ratio of the annual turnover of the enterprise to the number of calibrations of measuring instruments performed at the enterprise. The number of calibrations of measuring instruments in the industry is calculated as the ratio of the annual turnover of the industry to the weight of calibration in the industry. Similarly, the number of calibrations is

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