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Journal articles on the topic 'Surface Sensor Validation'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Puiu, Mihaela, Lucian-Gabriel Zamfir, Valentin Buiculescu, Angela Baracu, Cristina Mitrea, and Camelia Bala. "Significance Testing and Multivariate Analysis of Datasets from Surface Plasmon Resonance and Surface Acoustic Wave Biosensors: Prediction and Assay Validation for Surface Binding of Large Analytes." Sensors 18, no. 10 (2018): 3541. http://dx.doi.org/10.3390/s18103541.

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In this study, we performed uni- and multivariate data analysis on the extended binding curves of several affinity pairs: immobilized acetylcholinesterase (AChE)/bioconjugates of aflatoxin B1(AFB1) and immobilized anti-AFB1 monoclonal antibody/AFB1-protein carriers. The binding curves were recorded on three mass sensitive cells operating in batch configurations: one commercial surface plasmon resonance (SPR) sensor and two custom-made Love wave surface-acoustic wave (LW-SAW) sensors. We obtained 3D plots depicting the time-evolution of the sensor response as a function of analyte concentration

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Fares, Hoda, Yahya Abbass, Maurizio Valle, and Lucia Seminara. "Validation of Screen-Printed Electronic Skin Based on Piezoelectric Polymer Sensors." Sensors 20, no. 4 (2020): 1160. http://dx.doi.org/10.3390/s20041160.

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This paper proposes a validation method of the fabrication technology of a screen-printed electronic skin based on polyvinylidene fluoride-trifluoroethylene P(VDF-TrFE) piezoelectric polymer sensors. This required researchers to insure, through non-direct sensor characterization, that printed sensors were working as expected. For that, we adapted an existing model to non-destructively extract sensor behavior in pure compression (i.e., the d33 piezocoefficient) by indentation tests over the skin surface. Different skin patches, designed to sensorize a glove and a prosthetic hand (11 skin patche

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Williams, Stephen, Lonnie T. Parker, and Ayanna M. Howard. "Calibration and Validation of Earth-Observing Sensors Using Deployable Surface-Based Sensor Networks." IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing 3, no. 4 (2010): 427–32. http://dx.doi.org/10.1109/jstars.2010.2053021.

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4

Yan, Jianguo, Chunguang Wang, Shengshi Xie, and Lijuan Wang. "DESIGN AND VALIDATION OF A SURFACE PROFILING APPARATUS FOR AGRICULTURAL TERRAIN ROUGHNESS MEASUREMENTS." INMATEH Agricultural Engineering 59, no. 3 (2019): 169–80. http://dx.doi.org/10.35633/inmateh-59-19.

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How to accurately and efficiently measure the profiles of the terrain on which agricultural machines operate has been an ongoing research topic. In this study, a surface profiling apparatus (profiler) was developed to measure agricultural terrain profiles along parallel tracks. The profiler is mainly composed of sensor frames, an RTK-GNSS system (Real Time Kinematics-Global Navigation Satellite Systems), laser sensors, an Inertial Measurement Unit (IMU) sensor and a data acquisition system. Along with a full description of how the terrain profiles were produced, a methodology to compensate for

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WANG Yi-jia, 王弋嘉, 张崇磊 ZHANG Chong-lei, 王蓉 WANG rong, 朱思伟 ZHU Si-wei, and 袁小聪 YUAN Xiao-cong. "Optimization and validation of differential interferometric surface plasmon resonance sensor." Optics and Precision Engineering 21, no. 3 (2013): 672–79. http://dx.doi.org/10.3788/ope.20132103.0672.

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Gray, Mark E., Jamie R. K. Marland, Camelia Dunare, et al. "In vivo validation of a miniaturized electrochemical oxygen sensor for measuring intestinal oxygen tension." American Journal of Physiology-Gastrointestinal and Liver Physiology 317, no. 2 (2019): G242—G252. http://dx.doi.org/10.1152/ajpgi.00050.2019.

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Recent advances in the fields of electronics and microfabrication techniques have led to the development of implantable medical devices for use within the field of precision medicine. Monitoring visceral surface tissue O2 tension ([Formula: see text]) by means of an implantable sensor is potentially useful in many clinical situations, including the perioperative management of patients undergoing intestinal resection and anastomosis. This concept could provide a means by which treatment could be tailored to individual patients. This study describes the in vivo validation of a novel, miniaturize

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Çimen, Duygu, Nilay Bereli, and Adil Denizli. "Surface Plasmon Resonance Based on Molecularly Imprinted Polymeric Film for l-Phenylalanine Detection." Biosensors 11, no. 1 (2021): 21. http://dx.doi.org/10.3390/bios11010021.

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In this study, we designed a simple, rapid, sensitive and selective surface plasmon resonance (SPR) sensor for detection of L-phenylalaine by utilizing molecular imprinting technology. l-phenylalanine imprinted and non-imprinted poly(2-hydroxyethyl methacrylate-methacryloyl-l-phenylalanine) polymeric films were synthesized onto SPR chip surfaces using ultraviolet polymerization. l-phenyalanine imprinted and non-imprinted SPR sensors were characterized by using contact angle, atomic force microscopy and ellipsometry. After characterization studies, kinetic studies were carried out in the concen

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Szucs, Kimberly A., and John D. Borstad. "Capturing three-dimensional clavicle kinematics: a validation of surface sensor measurements." International Journal of Experimental and Computational Biomechanics 3, no. 1 (2015): 1. http://dx.doi.org/10.1504/ijecb.2015.067678.

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9

MENG, YANYU, SHI YAN, and XIAOLONG WEN. "MECHANICAL MODELING AND EXPERIMENTAL VALIDATION ON PIEZOCERAMIC BASED ON THE SURFACE-BONDED PZT SENSOR." Surface Review and Letters 26, no. 06 (2019): 1850209. http://dx.doi.org/10.1142/s0218625x18502098.

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This paper proposes the modified mechanical and mathematical modeling of lead zirconium titanate (PZT) sensor based on the PZT constitutive relation in order to solve the complicated boundary condition and stress situation of PZT sensor due to the effect of adhesive-layer damping. The experimental study on the surface-bonded PZT sensor is chosen to carry out the correctness of the proposed models. The results show that the PZT sensor modeling is simplified to three types. When the amplitude of harmonic force is constant, the greater the excitation frequency, the more sensitive the output volta

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10

Kashyap, Ritayan, Soumik Chakraborty, Shuwen Zeng, et al. "Enhanced Biosensing Activity of Bimetallic Surface Plasmon Resonance Sensor." Photonics 6, no. 4 (2019): 108. http://dx.doi.org/10.3390/photonics6040108.

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Surface plasmon resonance (SPR) sensors present a challenge when high sensitivity and small FWHM (full width at half maximum) are required to be achieved simultaneously. FWHM is defined by the difference between the two extreme values of the independent variable at which the value of the dependent variable is equal to half of its maximum. A smaller value of FWHM indicates better accuracy of SPR measurements. Theoretically, many authors have claimed the possibility of simultaneously achieving high sensitivity and small FWHM, which in most of the cases has been limited by experimental validation

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Lungu-Moscalu, Alexandrina, Raluca-Ioana Stefan-van Staden та Marius Badulescu. "Validation of Disposable Stochastic Sensors Based on Nanolayer Depositon(s) of Silver and AgC Composite on Plastic for the Assay of α-Amylase in Whole Blood and Saliva". Proceedings 55, № 1 (2020): 4. http://dx.doi.org/10.3390/proceedings2020055004.

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Nanolayer deposition(s) of Ag and AgC composite on a plastic substrate was used to design disposable stochastic sensors. The first sensor was based on an Ag nanofilm deposited on plastic; for the second sensor, an AgC composite was deposited on plastic, and, for the third sensor, on the plastic was deposited first a nanofilm of Ag and on top of it a nanofilm of the AgC composite. α-Cyclodextrin was used to modify the active surface of the sensor.

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Uddin, Mohammad, Shane Alford, and Syed Mahfuzul Aziz. "Evaluating Energy Generation Capacity of PVDF Sensors: Effects of Sensor Geometry and Loading." Materials 14, no. 8 (2021): 1895. http://dx.doi.org/10.3390/ma14081895.

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This paper focuses on the energy generating capacity of polyvinylidene difluoride (PVDF) piezoelectric material through a number of prototype sensors with different geometric and loading characteristics. The effect of sensor configuration, surface area, dielectric thickness, aspect ratio, loading frequency and strain on electrical power output was investigated systematically. Results showed that parallel bimorph sensor was found to be the best energy harvester, with measured capacitance being reasonably acceptable. Power output increased with the increase of sensor’s surface area, loading freq

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Çimen, Duygu, and Adil Denizli. "Development of Rapid, Sensitive, and Effective Plasmonic Nanosensor for the Detection of Vitamins in Infact Formula and Milk Samples." Photonic Sensors 10, no. 4 (2020): 316–32. http://dx.doi.org/10.1007/s13320-020-0578-1.

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Abstract The aim of the present study is to develop a surface plasmon resonance sensor for the detection of vitamin B2, vitamin B9, and vitamin B12 in food samples by using the molecular imprinting technique. The vitamin B2, vitamin B9, and vitamin B12 imprinted and the non-imprinted surface plasmon resonance sensor chip surfaces were characterized by using contact angle measurements, atomic force microscopy, ellipsometry, and Fourier transform infrared-attenuated total reflectance. The real-time detection of vitamin B2, vitamin B9, and vitamin B12 was analyzed by using aqueous solutions in th

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Nichols, Andrew, Matteo Rubinato, Yun-Hang Cho, and Jiayi Wu. "Optimal Use of Titanium Dioxide Colourant to Enable Water Surfaces to Be Measured by Kinect Sensors." Sensors 20, no. 12 (2020): 3507. http://dx.doi.org/10.3390/s20123507.

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Recent studies have sought to use Microsoft Kinect sensors to measure water surface shape in steady flows or transient flow processes. They have typically employed a white colourant, usually titanium dioxide (TiO2), in order to make the surface opaque and visible to the infrared-based sensors. However, the ability of Kinect Version 1 (KV1) and Kinect Version 2 (KV2) sensors to measure the deformation of ostensibly smooth reflective surfaces has never been compared, with most previous studies using a V1 sensor with no justification. Furthermore, the TiO2 has so far been used liberally and indet

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Coopersmith, Evan J., Michael H. Cosh, Walt A. Petersen, John Prueger, and James J. Niemeier. "Soil Moisture Model Calibration and Validation: An ARS Watershed on the South Fork Iowa River." Journal of Hydrometeorology 16, no. 3 (2015): 1087–101. http://dx.doi.org/10.1175/jhm-d-14-0145.1.

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Abstract Soil moisture monitoring with in situ technology is a time-consuming and costly endeavor for which a method of increasing the resolution of spatial estimates across in situ networks is necessary. Using a simple hydrologic model, the estimation capacity of an in situ watershed network can be increased beyond the station distribution by using available precipitation, soil, and topographic information. A study site was selected on the Iowa River, characterized by homogeneous soil and topographic features, reducing the variables to precipitation only. Using 10-km precipitation estimates f

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Merchant, Christopher J., Thomas Block, Gary K. Corlett, Owen Embury, Jonathan P. D. Mittaz, and James D. P. Mollard. "Harmonization of Space-Borne Infra-Red Sensors Measuring Sea Surface Temperature." Remote Sensing 12, no. 6 (2020): 1048. http://dx.doi.org/10.3390/rs12061048.

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Sea surface temperature (SST) is observed by a constellation of sensors, and SST retrievals are commonly combined into gridded SST analyses and climate data records (CDRs). Differential biases between SSTs from different sensors cause errors in such products, including feature artefacts. We introduce a new method for reducing differential biases across the SST constellation, by reconciling the brightness temperature (BT) calibration and SST retrieval parameters between sensors. We use the Advanced Along-Track Scanning Radiometer (AATSR) and the Sea and Land Surface Temperature Radiometer (SLST

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17

Reverdin, G., S. Morisset, J. Boutin, et al. "Validation of Salinity Data from Surface Drifters." Journal of Atmospheric and Oceanic Technology 31, no. 4 (2014): 967–83. http://dx.doi.org/10.1175/jtech-d-13-00158.1.

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Abstract Salinity measurements from 119 surface drifters in 2007–12 were assessed; 80% [Surface Velocity Program with a barometer with a salinity sensor (SVP-BS)] and 75% [SVP with salinity (SVP-S)] of the salinity data were found to be usable, after editing out some spikes. Sudden salinity jumps are found in drifter salinity records that are not always associated with temperature jumps, in particular in the wet tropics. A method is proposed to decide whether and how to correct those jumps, and the uncertainty in the correction applied. Northeast of South America, in a region influenced by the

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18

Loprencipe, Giuseppe, Flavio Guilherme Vaz de Almeida Filho, Rafael Henrique de Oliveira, and Salvatore Bruno. "Validation of a Low-Cost Pavement Monitoring Inertial-Based System for Urban Road Networks." Sensors 21, no. 9 (2021): 3127. http://dx.doi.org/10.3390/s21093127.

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Road networks are monitored to evaluate their decay level and the performances regarding ride comfort, vehicle rolling noise, fuel consumption, etc. In this study, a novel inertial sensor-based system is proposed using a low-cost inertial measurement unit (IMU) and a global positioning system (GPS) module, which are connected to a Raspberry Pi Zero W board and embedded inside a vehicle to indirectly monitor the road condition. To assess the level of pavement decay, the comfort index awz defined by the ISO 2631 standard was used. Considering 21 km of roads with different levels of pavement deca

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Høyer, Jacob L., Ioanna Karagali, Gorm Dybkjær, and Rasmus Tonboe. "Multi sensor validation and error characteristics of Arctic satellite sea surface temperature observations." Remote Sensing of Environment 121 (June 2012): 335–46. http://dx.doi.org/10.1016/j.rse.2012.01.013.

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20

Mota, Lia, Alexandre Mota, Cláudia Pezzuto, et al. "Development of a Surface Temperature Sensor to Enhance Energy Efficiency Actions in Buildings." Sensors 18, no. 9 (2018): 3046. http://dx.doi.org/10.3390/s18093046.

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The air temperature increase in urban centers can lead to problems such as increased energy consumption associated to air conditioning, the intensification of pollution, human discomfort and health problems. In this context, the building envelope plays an important role in urban thermal equilibrium. Energy efficiency rating systems for buildings (LEED—Leadership in Energy and Environmental Design, AQUA—High Environmental Quality, PROCEL Edifica, etc.) stimulate energy efficiency actions in the built environment, considering, for example, the envelope and energy efficiency initiatives in buildi

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von Bueren, S., A. Burkart, A. Hueni, U. Rascher, M. Tuohy, and I. Yule. "Comparative validation of UAV based sensors for the use in vegetation monitoring." Biogeosciences Discussions 11, no. 3 (2014): 3837–64. http://dx.doi.org/10.5194/bgd-11-3837-2014.

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Abstract. Unmanned Aerial Vehicles (UAVs) equipped with lightweight spectral sensors facilitate non-destructive, near real time vegetation analysis. In order to guarantee quality scientific analysis, data acquisition protocols and processing methodologies need to be developed and new sensors must be trialed against state of the art instruments. In the following study, four different types of optical UAV based sensors (RGB camera, near infrared camera, six band multispectral camera, and a high resolution spectrometer) were compared and validated in order to evaluate their applicability for vege

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Wang, Yancheng, Guanhao Liang, Deqing Mei, and Zichen Chen. "Flexible Tactile Sensor Array Mounted on the Curved Surface: Analytical Modeling and Experimental Validation." Journal of Microelectromechanical Systems 26, no. 5 (2017): 1002–11. http://dx.doi.org/10.1109/jmems.2017.2666158.

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23

Yang, Jie, Qingquan Liu, Gaoying Chen, and Xuan Deng. "Optimized design and experimental validation of a temperature sensor for surface air temperature observation." Sensors and Actuators A: Physical 323 (June 2021): 112646. http://dx.doi.org/10.1016/j.sna.2021.112646.

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Gerace, Aaron, Tania Kleynhans, Rehman Eon, and Matthew Montanaro. "Towards an Operational, Split Window-Derived Surface Temperature Product for the Thermal Infrared Sensors Onboard Landsat 8 and 9." Remote Sensing 12, no. 2 (2020): 224. http://dx.doi.org/10.3390/rs12020224.

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The split window technique has been used for over thirty years to derive surface temperatures of the Earth with image data collected from spaceborne sensors containing two thermal channels. The latest NASA/USGS Landsat satellites contain the Thermal Infrared Sensor (TIRS) instruments that acquire Earth data in two longwave infrared bands, as opposed to a single band with earlier Landsats. The United States Geological Survey (USGS) will soon begin releasing a surface temperature product for Landsats 4 through 8 based on the single spectral channel methodology. However, progress is being made to

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Su, Z., W. J. Timmermans, C. van der Tol, et al. "EAGLE 2006 – Multi-purpose, multi-angle and multi-sensor in-situ and airborne campaigns over grassland and forest." Hydrology and Earth System Sciences 13, no. 6 (2009): 833–45. http://dx.doi.org/10.5194/hess-13-833-2009.

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Abstract. EAGLE2006 – an intensive field campaign for the advances in land surface hydrometeorological processes – was carried out in the Netherlands from 8th to 18th June 2006, involving 16 institutions with in total 67 people from 16 different countries. In addition to the acquisition of multi-angle and multi-sensor satellite data, several airborne instruments – an optical imaging sensor, an imaging microwave radiometer, and a flux airplane – were deployed and extensive ground measurements were conducted over one grassland site at Cabauw and two forest sites at Loobos and Speulderbos in the

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Annanouch, Fatima-Ezahra, Gilles Bouchet, Pierre Perrier, et al. "How the Chamber Design Can Affect Gas Sensor Responses." Proceedings 2, no. 13 (2018): 820. http://dx.doi.org/10.3390/proceedings2130820.

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In this paper, we report the significant role played by the testing chamber for measuring the true gas sensor responses. Two different designs were studied and compared. The first one has a cross-shape in which the direction of gas flow is perpendicular to the sensor surface. The second one has a boat-shape in which the gas flow is tangential to the sensor surface. The results demonstrated that contrarily to the cross-shape chamber, the gas concentration is highly homogenous and equal to the set point in the boat-shape chamber. Additionally, the sensor responses are much stable, faster and hig

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Boutin, J., Y. Chao, W. E. Asher, et al. "Satellite and In Situ Salinity: Understanding Near-Surface Stratification and Subfootprint Variability." Bulletin of the American Meteorological Society 97, no. 8 (2016): 1391–407. http://dx.doi.org/10.1175/bams-d-15-00032.1.

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Abstract Remote sensing of salinity using satellite-mounted microwave radiometers provides new perspectives for studying ocean dynamics and the global hydrological cycle. Calibration and validation of these measurements is challenging because satellite and in situ methods measure salinity differently. Microwave radiometers measure the salinity in the top few centimeters of the ocean, whereas most in situ observations are reported below a depth of a few meters. Additionally, satellites measure salinity as a spatial average over an area of about 100 × 100 km2. In contrast, in situ sensors provid

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Su, Z., W. J. Timmermans, C. van der Tol, et al. "EAGLE 2006 – multi-purpose, multi-angle and multi-sensor in-situ, airborne and space borne campaigns over grassland and forest." Hydrology and Earth System Sciences Discussions 6, no. 2 (2009): 1797–841. http://dx.doi.org/10.5194/hessd-6-1797-2009.

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Abstract. EAGLE2006 – an intensive field campaign for the advances in land surface hydrometeorological processes – was carried out in the Netherlands from 8 to 18 June 2006, involving 16 institutions with in total 67 people from 16 different countries. In addition to the acquisition of multi-angle and multi-sensor satellite data, several airborne instruments – an optical imaging sensor, an imaging microwave radiometer, and a flux airplane – were deployed and extensive ground measurements were conducted over one grassland site at Cabauw and two forest sites at Loobos and Speulderbos in the cent

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Sadighi, Kira, Evan Coffey, Andrea Polidori, et al. "Intra-urban spatial variability of surface ozone in Riverside, CA: viability and validation of low-cost sensors." Atmospheric Measurement Techniques 11, no. 3 (2018): 1777–92. http://dx.doi.org/10.5194/amt-11-1777-2018.

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Abstract. Sensor networks are being more widely used to characterize and understand compounds in the atmosphere like ozone (O3). This study employs a measurement tool, called the U-Pod, constructed at the University of Colorado Boulder, to investigate spatial and temporal variability of O3 in a 200 km2 area of Riverside County near Los Angeles, California. This tool contains low-cost sensors to collect ambient data at non-permanent locations. The U-Pods were calibrated using a pre-deployment field calibration technique; all the U-Pods were collocated with regulatory monitors. After collocation

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Mehta, Daryush D., James B. Kobler, Steven M. Zeitels, et al. "Toward Development of a Vocal Fold Contact Pressure Probe: Bench-Top Validation of a Dual-Sensor Probe Using Excised Human Larynx Models." Applied Sciences 9, no. 20 (2019): 4360. http://dx.doi.org/10.3390/app9204360.

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A critical element in understanding voice production mechanisms is the characterization of vocal fold collision, which is widely considered a primary etiological factor in the development of common phonotraumatic lesions such as nodules and polyps. This paper describes the development of a transoral, dual-sensor intraglottal/subglottal pressure probe for the simultaneous measurement of vocal fold collision and subglottal pressures during phonation using two miniature sensors positioned 7.6 mm apart at the distal end of a rigid cannula. Proof-of-concept testing was performed using excised whole

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Poli, Paul, Marc Lucas, Anne O'Carroll, et al. "The Copernicus Surface Velocity Platform drifter with Barometer and Reference Sensor for Temperature (SVP-BRST): genesis, design, and initial results." Ocean Science 15, no. 1 (2019): 199–214. http://dx.doi.org/10.5194/os-15-199-2019.

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Abstract. To support calibration and validation of satellite sea surface temperature (SST) retrievals, over 60 high-resolution SST (HRSST) drifting buoys were deployed at sea between 2012 and 2017. Their data record is reviewed here. It is confirmed that sea state and immersion depth play an important role in understanding the data collected by such buoys and that the SST sensors need adequate insulation. In addition, calibration verification of three recovered drifters suggests that the sensor drift is low, albeit negative at around −0.01 K year−1. However, the statistical significance of the

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Justice, C., A. Belward, J. Morisette, P. Lewis, J. Privette, and F. Baret. "Developments in the 'validation' of satellite sensor products for the study of the land surface." International Journal of Remote Sensing 21, no. 17 (2000): 3383–90. http://dx.doi.org/10.1080/014311600750020000.

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Sanchez-Cuevas, Pedro J., Antonio Gonzalez-Morgado, Nicolas Cortes, et al. "Fully-Actuated Aerial Manipulator for Infrastructure Contact Inspection: Design, Modeling, Localization, and Control." Sensors 20, no. 17 (2020): 4708. http://dx.doi.org/10.3390/s20174708.

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This paper presents the design, modeling and control of a fully actuated aerial robot for infrastructure contact inspection as well as its localization system. Health assessment of transport infrastructure involves measurements with sensors in contact with the bridge and tunnel surfaces and the installation of monitoring sensing devices at specific points. The design of the aerial robot presented in the paper includes a 3DoF lightweight arm with a sensorized passive joint which can measure the contact force to regulate the force applied with the sensor on the structure. The aerial platform has

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Karduna, Andrew R., Phil W. McClure, Lori A. Michener, and Brian Sennett. "Dynamic Measurements of Three-Dimensional Scapular Kinematics: A Validation Study." Journal of Biomechanical Engineering 123, no. 2 (2000): 184–90. http://dx.doi.org/10.1115/1.1351892.

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The validation of two noninvasive methods for measuring the dynamic three-dimensional kinematics of the human scapula with a magnetic tracking device is presented. One method consists of simply fixing a sensor directly to the acromion and the other consists of mounting a sensor to an adjustable plastic jig that fits over the scapular spine and acromion. The concurrent validity of both methods was assessed separately by comparison with data collected simultaneously from an invasive approach in which pins were drilled directly into the scapula. The differences between bone and skin based measure

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Nanni, Marcos Rafael, José Alexandre Melo Demattê, Marlon Rodrigues, et al. "Mapping Particle Size and Soil Organic Matter in Tropical Soil Based on Hyperspectral Imaging and Non-Imaging Sensors." Remote Sensing 13, no. 9 (2021): 1782. http://dx.doi.org/10.3390/rs13091782.

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We evaluated the use of airborne hyperspectral imaging and non-imaging sensors in the Vis—NIR—SWIR spectral region to assess particle size and soil organic matter in the surface layer of tropical soils (Oxisols, Ultisols, Entisols). The study area is near Piracicaba municipality, São Paulo state, Brazil, in a sugarcane cultivation area of 135 hectares. The study area, with bare soil, was imaged in April 2016 by the AisaFENIX aerotransported hyperspectral sensor, with spectral resolution of 3.5 nm between 380 and 970 nm, and 12 nm between 970 and 2500 nm. We collected 66 surface soil samples. T

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Greuell, Wouter, and Johannes Oerlemans. "Validation of AVHRR- and MODIS-derived albedos of snow and ice surfaces by means of helicopter measurements." Journal of Glaciology 51, no. 172 (2005): 37–48. http://dx.doi.org/10.3189/172756505781829575.

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AbstractWe describe the validation of surface albedos of snow and glacier ice as derived from Advanced Very High Resolution Radiometer (AVHRR) and MOderate Resolution Imaging Spectrometer (MODIS) satellite data. For this purpose we measured surface albedos from a helicopter over Vatnajokull, Iceland, and the Kangerlussuaq transect (western part of the Greenland ice sheet) in Thematic Mapper (TM) bands 2 and 4 and AVHRR bands 1 and 2, and converted these values to ‘measured albedos’ in three MODIS bands. Relative to other validation methods, our helicopter measurements have the advantages of la

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Meng, Long, Anjing Zhang, Chen Chen, et al. "Exploration of Human Activity Recognition Using a Single Sensor for Stroke Survivors and Able-Bodied People." Sensors 21, no. 3 (2021): 799. http://dx.doi.org/10.3390/s21030799.

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Commonly used sensors like accelerometers, gyroscopes, surface electromyography sensors, etc., which provide a convenient and practical solution for human activity recognition (HAR), have gained extensive attention. However, which kind of sensor can provide adequate information in achieving a satisfactory performance, or whether the position of a single sensor would play a significant effect on the performance in HAR are sparsely studied. In this paper, a comparative study to fully investigate the performance of the aforementioned sensors for classifying four activities (walking, tooth brushin

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Tian, Q. Y., Q. Liu, H. W. Zhang, et al. "ALBEDO RETRIEVING FROM DSCOVR/EPIC DATA AND PRELIMINARY VALIDATION." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-3/W9 (October 25, 2019): 147–52. http://dx.doi.org/10.5194/isprs-archives-xlii-3-w9-147-2019.

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Abstract. Land surface albedo plays an important role in climate change research. Satellite remote sensing has the characteristic of wide observation range, and it can make repeated observations on the same area. Therefore, using the remote sensing data to retrieve surface albedo becomes a main method to obtain the surface albedo in a wide range or even on a global scale. However, the time resolution of existing albedo products is usually low, which has a great impact on the analysis of rapid changes in surface vegetation and the climate change research. The Deep Space Climate Observatory (DSC

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Lich, Julian, Tino Wollmann, Angelos Filippatos, Maik Gude, Juergen Czarske, and Robert Kuschmierz. "Spatially Resolved Experimental Modal Analysis on High-Speed Composite Rotors Using a Non-Contact, Non-Rotating Sensor." Sensors 21, no. 14 (2021): 4705. http://dx.doi.org/10.3390/s21144705.

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Due to their lightweight properties, fiber-reinforced composites are well suited for large and fast rotating structures, such as fan blades in turbomachines. To investigate rotor safety and performance, in situ measurements of the structural dynamic behaviour must be performed during rotating conditions. An approach to measuring spatially resolved vibration responses of a rotating structure with a non-contact, non-rotating sensor is investigated here. The resulting spectra can be assigned to specific locations on the structure and have similar properties to the spectra measured with co-rotatin

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Dankert, Heiko, and Jochen Horstmann. "A Marine Radar Wind Sensor." Journal of Atmospheric and Oceanic Technology 24, no. 9 (2007): 1629–42. http://dx.doi.org/10.1175/jtech2083.1.

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Abstract A new method for retrieving the wind vector from radar-image sequences is presented. This method, called WiRAR, uses a marine X-band radar to analyze the backscatter of the ocean surface in space and time with respect to surface winds. Wind direction is found using wind-induced streaks, which are very well aligned with the mean surface wind direction and have a typical spacing above 50 m. Wind speeds are derived using a neural network by parameterizing the relationship between the wind vector and the normalized radar cross section (NRCS). To improve performance, it is also considered

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Kroisleitner, Christine, Annett Bartsch, and Helena Bergstedt. "Circumpolar patterns of potential mean annual ground temperature based on surface state obtained from microwave satellite data." Cryosphere 12, no. 7 (2018): 2349–70. http://dx.doi.org/10.5194/tc-12-2349-2018.

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Abstract. Gap filling is required for temporally and spatially consistent records of land surface temperature from satellite data due to clouds or snow cover. Land surface state, frozen versus unfrozen conditions, can be, however, captured globally with satellite data obtained by microwave sensors. The number of frozen days per year has been previously proposed to be used for permafrost extent determination. This suggests an underlying relationship between number of frozen days and mean annual ground temperature (MAGT). We tested this hypothesis for the Northern Hemisphere north of 50∘ N using

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Roossien, Charlotte Christina, Christian Theodoor Maria Baten, Mitchel Willem Pieter van der Waard, Michiel Felix Reneman, and Gijsbertus Jacob Verkerke. "Automatically Determining Lumbar Load during Physically Demanding Work: A Validation Study." Sensors 21, no. 7 (2021): 2476. http://dx.doi.org/10.3390/s21072476.

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A sensor-based system using inertial magnetic measurement units and surface electromyography is suitable for objectively and automatically monitoring the lumbar load during physically demanding work. The validity and usability of this system in the uncontrolled real-life working environment of physically active workers are still unknown. The objective of this study was to test the discriminant validity of an artificial neural network-based method for load assessment during actual work. Nine physically active workers performed work-related tasks while wearing the sensor system. The main measure

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Adirosi, Elisa, Mario Montopoli, Alessandro Bracci, et al. "Validation of GPM Rainfall and Drop Size Distribution Products through Disdrometers in Italy." Remote Sensing 13, no. 11 (2021): 2081. http://dx.doi.org/10.3390/rs13112081.

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The high relevance of satellites for collecting information regarding precipitation at global scale implies the need of a continuous validation of satellite products to ensure good data quality over time and to provide feedback for updating and improving retrieval algorithms. However, validating satellite products using measurements collected by sensors at ground is still a challenging task. To date, the Dual-frequency Precipitation Radar (DPR) aboard the Core Satellite of the Global Precipitation Measurement (GPM) mission is the only active sensor able to provide, at global scale, vertical pr

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Li, Rongxing, Hongwei Li, Tong Hao, et al. "Assessment of ICESat-2 ice surface elevations over the Chinese Antarctic Research Expedition (CHINARE) route, East Antarctica, based on coordinated multi-sensor observations." Cryosphere 15, no. 7 (2021): 3083–99. http://dx.doi.org/10.5194/tc-15-3083-2021.

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Abstract. We present the results of an assessment of ice surface elevation measurements from NASA's Ice, Cloud, and land Elevation Satellite-2 (ICESat-2) along the CHINARE (CHINese Antarctic Research Expedition) route near the Amery Ice Shelf in East Antarctica. The validation campaign was designed and implemented in cooperation with the 36th CHINARE Antarctic expedition from December 2019 to February 2020. The assessment of the ICESat-2 geolocated photon product (ATL03) and land ice elevation product (ATL06) was performed based on coordinated multi-sensor observations using two roof-mounted k

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Ruddick, Kevin G., Kenneth Voss, Andrew C. Banks, et al. "A Review of Protocols for Fiducial Reference Measurements of Downwelling Irradiance for the Validation of Satellite Remote Sensing Data over Water." Remote Sensing 11, no. 15 (2019): 1742. http://dx.doi.org/10.3390/rs11151742.

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This paper reviews the state of the art of protocols for the measurement of downwelling irradiance in the context of Fiducial Reference Measurements (FRM) of water reflectance for satellite validation. The measurement of water reflectance requires the measurement of water-leaving radiance and downwelling irradiance just above water. For the latter, there are four generic families of method, using: (1) an above-water upward-pointing irradiance sensor; (2) an above-water downward-pointing radiance sensor and a reflective plaque; (3) a Sun-pointing radiance sensor (sunphotometer); or (4) an under

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Czaja, Tomasz, Kamil Wójcik, Maria Grzeszczuk, and Roman Szostak. "Polypyrrole–Methyl Orange Raman pH Sensor." Polymers 11, no. 4 (2019): 715. http://dx.doi.org/10.3390/polym11040715.

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An easy-to-prepare pH sensor based on electrochemically obtained polypyrrole doped with methyl orange ions is described. It enables the determination of a pH value in the 3–13 range for volumes below 1 µL. In a wide pH range, resonance and pre-resonance methyl orange Raman spectra, excited with the 514.5 nm line of an Ar+ laser, changed noticeably in function of H+ concentration. Two types of measurements were performed. In the first case, Raman spectra of the analyzed solutions were collected for samples placed on the sensor surface using a confocal microscope equipped with a 10x objective. N

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Fischer, C., D. Klein, G. Kerr, et al. "Data Validation and Case Studies using the TET-1 Thermal Infrared Satellite System." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-7/W3 (April 30, 2015): 1177–82. http://dx.doi.org/10.5194/isprsarchives-xl-7-w3-1177-2015.

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Based on the DLR satellite system BIRD, launched and operated in the early 2000, the TET-1 satellite has been launched in 2012 as part of the FireBird satellite constellation. The constellation will consist of two satellites, the second one to be launched in the first half of 2016. Acquired imagery is processed and archived by DLR and will be publicly available. For this purpose, a processing chain has been implemented converting raw data (level 0 product) to geo-annotated at-sensor radiance (level 1b). Further data products can be derived, e.g. information on brightness temperature, fire radi

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Melville, Bethany, Arko Lucieer, and Jagannath Aryal. "Classification of Lowland Native Grassland Communities Using Hyperspectral Unmanned Aircraft System (UAS) Imagery in the Tasmanian Midlands." Drones 3, no. 1 (2019): 5. http://dx.doi.org/10.3390/drones3010005.

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This paper presents the results of a study undertaken to classify lowland native grassland communities in the Tasmanian Midlands region. Data was collected using the 20 band hyperspectral snapshot PhotonFocus sensor mounted on an unmanned aerial vehicle. The spectral range of the sensor is 600 to 875 nm. Four vegetation classes were identified for analysis including Themeda triandra grassland, Wilsonia rotundifolia, Danthonia/Poa grassland, and Acacia dealbata. In addition to the hyperspectral UAS dataset, a Digital Surface Model (DSM) was derived using a structure-from-motion (SfM). Classific

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Dutilh, Vincent, Gilles Dessein, Joël Alexis, and Géraldine Perrin. "Links Between Machining Parameters and Surface Integrity in Drilling Ni-Superalloy." Advanced Materials Research 112 (May 2010): 171–78. http://dx.doi.org/10.4028/www.scientific.net/amr.112.171.

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In aerospace industry, the manufacturing of critical parts (high energy components) requires an important validation process to guarantee the quality of the produced parts, and thus their fatigue lifecycle. Globally, this validation consists in freezing the cutting conditions using metallurgical analysis or fatigue trials, and a test on the first article. This process is extremely complex and expensive. In this way establishing the correlation between the cutting conditions and the surface integrity will help us to optimize the manufacture of those parts. In this article, by the means of an ex

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Wang, Chaofan, Zhanna Sarsenbayeva, Xiuge Chen, Tilman Dingler, Jorge Goncalves, and Vassilis Kostakos. "Accurate Measurement of Handwash Quality Using Sensor Armbands: Instrument Validation Study." JMIR mHealth and uHealth 8, no. 3 (2020): e17001. http://dx.doi.org/10.2196/17001.

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Background Hand hygiene is a crucial and cost-effective method to prevent health care–associated infections, and in 2009, the World Health Organization (WHO) issued guidelines to encourage and standardize hand hygiene procedures. However, a common challenge in health care settings is low adherence, leading to low handwashing quality. Recent advances in machine learning and wearable sensing have made it possible to accurately measure handwashing quality for the purposes of training, feedback, or accreditation. Objective We measured the accuracy of a sensor armband (Myo armband) in detecting the

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