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Journal articles on the topic 'Global scan'

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Author: Grafiati

Published: 10 December 2022

Last updated: 28 January 2023

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1

Sun, Bo, Yadan Zeng, Houde Dai, Junhao Xiao, and Jianwei Zhang. "A novel scan registration method based on the feature-less global descriptor – spherical entropy image." Industrial Robot: An International Journal 44, no. 4 (June 19, 2017): 552–63. http://dx.doi.org/10.1108/ir-11-2016-0329.

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Purpose This paper aims to present the spherical entropy image (SEI), a novel global descriptor for the scan registration of three-dimensional (3D) point clouds. This paper also introduces a global feature-less scan registration strategy based on SEI. It is advantageous for 3D data processing in the scenarios such as mobile robotics and reverse engineering. Design/methodology/approach The descriptor works through representing the scan by a spherical function named SEI, whose properties allow to decompose the six-dimensional transformation into 3D rotation and 3D translation. The 3D rotation is estimated by the generalized convolution theorem based on the spherical Fourier transform of SEI. Then, the translation recovery is determined by phase only matched filtering. Findings No explicit features and planar segments should be contained in the input data of the method. The experimental results illustrate the parameter independence, high reliability and efficiency of the novel algorithm in registration of feature-less scans. Originality/value A novel global descriptor (SEI) for the scan registration of 3D point clouds is presented. It inherits both descriptive power of signature-based methods and robustness of histogram-based methods. A high reliability and efficiency registration method of scans based on SEI is also demonstrated.

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Matias-Guiu, J., R. Colomer, A. Segura, and A. Codina. "Cranial CT scan in transient global amnesia." Acta Neurologica Scandinavica 73, no. 3 (January 29, 2009): 298–301. http://dx.doi.org/10.1111/j.1600-0404.1986.tb03280.x.

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3

Weber, Joachim, Lutz Franken, Klaus-Werner Jörg, and Ewald von Puttkamer. "Reference scan matching for global self-localization." Robotics and Autonomous Systems 40, no. 2-3 (August 2002): 99–110. http://dx.doi.org/10.1016/s0921-8890(02)00235-x.

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4

Vignolo, L. A., E. Boccardi, and L. Caverni. "Unexpected CT-Scan Findings in Global Aphasia." Cortex 22, no. 1 (March 1986): 55–69. http://dx.doi.org/10.1016/s0010-9452(86)80032-6.

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5

Wakita, Shohei, and Takayuki Nakamura. "CIF-based Global Scan Matching Method Enhanced by Selective Merging 2D Range Scans." Journal of the Robotics Society of Japan 36, no. 6 (2018): 419–28. http://dx.doi.org/10.7210/jrsj.36.419.

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Abe, J., A. Tsuji, and J. Abe. "FAST CONVERGENCE METHOD FOR GLOBAL OPTIMAL 4DOF REGISTRATION." ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences V-2-2022 (May 17, 2022): 87–94. http://dx.doi.org/10.5194/isprs-annals-v-2-2022-87-2022.

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Abstract. Four degrees of freedom (4DoF) registration is a class of point cloud registration problems for finding a rigid transformation to align two point clouds under the constraint that the rigid transformation is composed of a three-dimensional (3D) translation and 1D rotation. This constraint is suitable to align scan pairs acquired using modern terrestrial Light Detection and Ranging (LiDAR) scanners, the scans of which can share the direction of gravity as the Z-axis due to such scanners using tripods or internal inclinometers. We propose a fast convergence method for global optimal 4DoF registration. The proposed method consists of (i) our newly developed 4DoF registration model formulated as an optimization problem involving the cylindrical norm to measure the distance between two points, and (ii) a fast convergence algorithm to find a global optimal solution of the model. We experimentally demonstrated that the proposed method reduced the number of iterations to convergence and computation time compared with a current 4DoF registration method, especially when the given scan pairs are similar but cannot be aligned, which often appears in registration of multiple point clouds.

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Sutherland, William J., Sarah Bardsley, Leon Bennun, Mick Clout, Isabelle M. Côté, Michael H. Depledge, Lynn V. Dicks, Andrew P. Dobson, Liz Fellman, and Erica Fleishman. "Horizon scan of global conservation issues for 2011." Trends in Ecology & Evolution 26, no. 1 (January 2011): 10–16. http://dx.doi.org/10.1016/j.tree.2010.11.002.

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Hisanaga, Satoshi, and Takaaki Kase. "Indoor Map Acquisition System Using Global Scan Matching Method and Laser Range Scan Data." IEEJ Transactions on Industry Applications 129, no. 8 (2009): 775–83. http://dx.doi.org/10.1541/ieejias.129.775.

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Pantazis, Dimitrios A. "First-Principles Calculation of Transition Metal Hyperfine Coupling Constants with the Strongly Constrained and Appropriately Normed (SCAN) Density Functional and its Hybrid Variants." Magnetochemistry 5, no. 4 (December 12, 2019): 69. http://dx.doi.org/10.3390/magnetochemistry5040069.

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Density functional theory (DFT) is used extensively for the first-principles calculation of hyperfine coupling constants in both main-group and transition metal systems. As with many other properties, the performance of DFT for hyperfine coupling constants is of variable quality, particularly for transition metal complexes, because it strongly depends on the nature of the chemical system and the type of approximation to the exchange-correlation functional. Recently, a meta-generalized-gradient approximation (mGGA) functional was proposed that obeys all known exact constraints for such a method, known as the Strongly Constrained and Appropriately Normed (SCAN) functional. In view of its theoretically superior formulation a benchmark set of complexes is used to assess the performance of SCAN for the challenging case of transition metal hyperfine coupling constants. In addition, two global hybrid versions of the functional, SCANh and SCAN0, are described and tested. The values computed with the new functionals are compared with experiment and with those of other DFT approximations. Although the original SCAN and the SCAN-based hybrids may offer improved hyperfine coupling constants for specific systems, no uniform improvement is observed. On the contrary, there are specific cases where the new functionals fail badly due to a flawed description of the underlying electronic structure. Therefore, despite these methodological advances, systematically accurate and system-independent prediction of transition metal hyperfine coupling constants with DFT remains an unmet challenge.

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10

Wasylyshyn, Nick, Brett Hemenway Falk, Javier O. Garcia, Christopher N. Cascio, Matthew Brook O’Donnell, C. Raymond Bingham, Bruce Simons-Morton, Jean M. Vettel, and Emily B. Falk. "Global brain dynamics during social exclusion predict subsequent behavioral conformity." Social Cognitive and Affective Neuroscience 13, no. 2 (February 1, 2018): 182–91. http://dx.doi.org/10.1093/scan/nsy007.

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11

Sutherland, William J., Mick Clout, Isabelle M. Côté, Peter Daszak, Michael H. Depledge, Liz Fellman, Erica Fleishman, et al. "A horizon scan of global conservation issues for 2010." Trends in Ecology & Evolution 25, no. 1 (January 2010): 1–7. http://dx.doi.org/10.1016/j.tree.2009.10.003.

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Sutherland, William J., Ros Aveling, Leon Bennun, Eleanor Chapman, Mick Clout, Isabelle M. Côté, Michael H. Depledge, et al. "A horizon scan of global conservation issues for 2012." Trends in Ecology & Evolution 27, no. 1 (January 2012): 12–18. http://dx.doi.org/10.1016/j.tree.2011.10.011.

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13

Sutherland, William J., Sarah Bardsley, Mick Clout, Michael H. Depledge, Lynn V. Dicks, Liz Fellman, Erica Fleishman, et al. "A horizon scan of global conservation issues for 2013." Trends in Ecology & Evolution 28, no. 1 (January 2013): 16–22. http://dx.doi.org/10.1016/j.tree.2012.10.022.

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14

Sutherland, William J., Rosalind Aveling, Thomas M. Brooks, Mick Clout, Lynn V. Dicks, Liz Fellman, Erica Fleishman, et al. "A horizon scan of global conservation issues for 2014." Trends in Ecology & Evolution 29, no. 1 (January 2014): 15–22. http://dx.doi.org/10.1016/j.tree.2013.11.004.

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15

Sutherland, William J., Mick Clout, Michael Depledge, Lynn V. Dicks, Jason Dinsdale, Abigail C. Entwistle, Erica Fleishman, et al. "A horizon scan of global conservation issues for 2015." Trends in Ecology & Evolution 30, no. 1 (January 2015): 17–24. http://dx.doi.org/10.1016/j.tree.2014.11.002.

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16

Sutherland, William J., Steven Broad, Jacqueline Caine, Mick Clout, Lynn V. Dicks, Helen Doran, Abigail C. Entwistle, et al. "A Horizon Scan of Global Conservation Issues for 2016." Trends in Ecology & Evolution 31, no. 1 (January 2016): 44–53. http://dx.doi.org/10.1016/j.tree.2015.11.007.

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17

Park, Soonyong, and Sung-Kee Park. "Global localization for mobile robots using reference scan matching." International Journal of Control, Automation and Systems 12, no. 1 (February 2014): 156–68. http://dx.doi.org/10.1007/s12555-012-9223-0.

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18

Kabbara, Sami W., Linda M. Zangwill, Rusdeep Mundae, Naama Hammel, Christopher Bowd, Felipe A. Medeiros, Robert N. Weinreb, and Akram Belghith. "Comparing optical coherence tomography radial and cube scan patterns for measuring Bruch’s membrane opening minimum rim width (BMO-MRW) in glaucoma and healthy eyes: cross-sectional and longitudinal analysis." British Journal of Ophthalmology 102, no. 3 (August 3, 2017): 344–51. http://dx.doi.org/10.1136/bjophthalmol-2016-310111.

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AimTo compare the cube and radial scan patterns of the spectral domain optical coherence tomography (SD-OCT) for quantifying the Bruch’s membrane opening minimum rim width (BMO-MRW).MethodsSixty healthy eyes and 189 glaucomatous eyes were included. The optic nerve head cube and radial pattern scans were acquired using Spectralis SD-OCT. BMO-MRWs were automatically delineated using the San Diego Automated Layer Segmentation Algorithm. The BMO-MRW diagnostic accuracy for glaucoma detection and rates of change derived from the two scan patterns were compared.ResultsThere was a significant difference between the baseline global BMO-MRW measurements of cube and radial scans for healthy (301.9±57.8 µm and 334.7±61.8 µm, respectively, p<0.003) and glaucoma eyes (181.2±63.0 µm and 210.2±67.2 µm, respectively, p<0.001). The area under the receiver operating characteristic curve for differentiating between healthy and glaucoma eyes was 0.90 for both the radial scan-based and cube scan-based BMO-MRW. No significant difference in the rate of BMO-MRW change (mean follow-up years) by scan pattern was found among both healthy (cube: −1.47 µm/year, radial: −1.53 µm/year; p=0.48) (1.6 years) and glaucoma eyes (cube: −2.37 µm/year, radial: −2.28 µm/year; p=0.45) (2.6 years).ConclusionAlthough the cube scan-based BMO-MRW was significantly smaller than the radial scan-based BMO-MRW, we found no significant difference between the two scan patterns for detecting glaucoma, identifying BMO location and measuring the rate of BMO-MRW change. These results suggest that although BMO-MRW estimates are not interchangeable, both scan patterns can be used for monitoring BMO-MRW changes over time.

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Duchaine, Bradley, Galit Yovel, and Ken Nakayama. "No global processing deficit in the Navon task in 14 developmental prosopagnosics." Social Cognitive and Affective Neuroscience 2, no. 2 (June 1, 2007): 104–13. http://dx.doi.org/10.1093/scan/nsm003.

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20

Leslie, D. A. "Global Scan: The Globalization of Advertising Agencies, Concepts, and Campaigns." Economic Geography 71, no. 4 (October 1995): 402. http://dx.doi.org/10.2307/144425.

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21

Sutherland, William J., Philip W. Atkinson, Stuart H. M. Butchart, Marcela Capaja, Lynn V. Dicks, Erica Fleishman, Kevin J. Gaston, et al. "A horizon scan of global biological conservation issues for 2022." Trends in Ecology & Evolution 37, no. 1 (January 2022): 95–104. http://dx.doi.org/10.1016/j.tree.2021.10.014.

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22

Kerr, Rob. "An overview of the results of the global scan survey." International Journal of Sustainability in Higher Education 2, no. 4 (December 2001): 368–70. http://dx.doi.org/10.1108/14676370110407569.

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23

Sutherland, William J., Philip W. Atkinson, Steven Broad, Sam Brown, Mick Clout, Maria P. Dias, Lynn V. Dicks, et al. "A 2021 Horizon Scan of Emerging Global Biological Conservation Issues." Trends in Ecology & Evolution 36, no. 1 (January 2021): 87–97. http://dx.doi.org/10.1016/j.tree.2020.10.014.

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24

RAO, MURALIDHARA G. "Ga-67 Scan Findings in Global Splenic Infarction and Abscess." Clinical Nuclear Medicine 20, no. 2 (February 1995): 177. http://dx.doi.org/10.1097/00003072-199502000-00017.

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25

Fu, Hao, and Rui Yu. "LIDAR Scan Matching in Off-Road Environments." Robotics 9, no. 2 (May 15, 2020): 35. http://dx.doi.org/10.3390/robotics9020035.

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Accurately matching the LIDAR scans is a critical step for an Autonomous Land Vehicle (ALV). Whilst most previous works have focused on the urban environment, this paper focuses on the off-road environment. Due to the lack of a publicly available dataset for algorithm comparison, a dataset containing LIDAR pairs with varying amounts of offsets in off-road environments is firstly constructed. Several popular scan matching approaches are then evaluated using this dataset. Results indicate that global approaches, such as Correlative Scan Matching (CSM), perform best on large offset datasets, whilst local scan matching approaches perform better on small offset datasets. To combine the merits of both approaches, a two-stage fusion algorithm is designed. In the first stage, several transformation candidates are sampled from the score map of the CSM algorithm. Local scan matching approaches then start from these transformation candidates to obtain the final results. Four performance indicators are also designed to select the best transformation. Experiments on a real-world dataset prove the effectiveness of the proposed approach.

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26

Gomez-Peralta, Fernando, Timothy Dunn, Katherine Landuyt, Yongjin Xu, and Juan Francisco Merino-Torres. "Flash glucose monitoring reduces glycemic variability and hypoglycemia: real-world data from Spain." BMJ Open Diabetes Research & Care 8, no. 1 (March 2020): e001052. http://dx.doi.org/10.1136/bmjdrc-2019-001052.

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ObjectiveObservations in real-world settings support and extend findings demonstrated in randomized controlled trials that show flash glucose monitoring improves glycemic control. In this study, Spain-specific relationships between testing frequency and glycemic parameters were investigated under real-world settings.Research design and methodsDeidentified glucose and user scanning data were analyzed and readers were rank ordered into 20 equal sized groups by daily scan frequency. Glucose parameters were calculated for each group: estimated HbA1c, time below range (<70 and ≤54 mg/dL), within range (70–180 mg/dL), and above range (>180 mg/dL). Glycemic variability (GV) metrics were described and data obtained from sensors in Spain and worldwide were compared.ResultsSpanish users (n=22 949) collected 37.1 million glucose scans, 250 million automatically recorded glucose readings, and checked glucose values via a mean of 13 scans/day. Estimated HbA1c, time below 70 mg/dL, at or below 54 mg/dL, above 180 mg/dL, and GV metrics were significantly lower in the highest compared with lowest scan rate group (39.6 to 3.9 scans/day). Time-in-range was higher for the highest versus lowest scan rate group at 15.6 vs 11.5 hours/day, respectively. GV metrics correlated positively with time below 70 mg/dL, at or below 54 mg/dL, above 180 mg/dL, and negatively with time-in-range. The relationship between glucose metrics and scan rate was similar in Spain and worldwide. However, time in hypoglycemia in Spain was higher in the groups with lower scan rates.ConclusionsAs seen in clinical trials, flash glucose monitoring in real-world settings allows frequent glucose checks. High scan rates are associated with the favorable glycemic markers of increased time-in-range and reduced time in hyperglycemia and hypoglycemia, and GV. The same trends, with unique nuances, are observed in both Spanish and global data.

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Jiang, Daohuai, Hongbo Chen, Rui Zheng, and Fei Gao. "Hand-held free-scan 3D photoacoustic tomography with global positioning system." Journal of Applied Physics 132, no. 7 (August 21, 2022): 074904. http://dx.doi.org/10.1063/5.0095919.

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As an emerging medical diagnostic technology, photoacoustic imaging has been implemented for both preclinical and clinical applications. For clinical convenience, a handheld free-scan photoacoustic tomography (PAT) system providing 3D imaging capability is essentially needed, which has potential for surgical navigation and disease diagnosis. In this paper, we proposed a free-scan 3D PAT (fsPAT) system based on a handheld linear-array ultrasound probe. A global positioning system (GPS) is applied for ultrasound probe's coordinate acquisition. The proposed fsPAT can simultaneously realize real-time 2D imaging and large field-of-view 3D volumetric imaging, which is reconstructed from the multiple 2D images with coordinate information acquired by the GPS. To form a high-quality 3D image, a dedicated space transformation method and a reconstruction algorithm are used and validated by the proposed system. Both simulation and experimental studies have been performed to prove the feasibility of the proposed fsPAT. To explore its clinical potential, in vivo 3D imaging of human wrist vessels is also conducted, showing a clear subcutaneous vessel network with high image contrast.

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Tomono, Masahiro. "A 2-D Global Scan Matching Method using Euclidean Invariant Signature." Journal of the Robotics Society of Japan 25, no. 3 (2007): 390–401. http://dx.doi.org/10.7210/jrsj.25.390.

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29

Rodger, Sylvia, and Steven J. Hoffman. "Where in the world is interprofessional education? A global environmental scan." Journal of Interprofessional Care 24, no. 5 (August 18, 2010): 479–91. http://dx.doi.org/10.3109/13561821003721329.

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30

Zong, Wenpeng, Minglei Li, Yanglin Zhou, Li Wang, Fengzhuo Xiang, and Guangyun Li. "A Fast and Accurate Planar-Feature-Based Global Scan Registration Method." IEEE Sensors Journal 19, no. 24 (December 15, 2019): 12333–45. http://dx.doi.org/10.1109/jsen.2019.2940478.

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31

Sánchez-Belenguer, Carlos, Simone Ceriani, Pierluigi Taddei, Erik Wolfart, and Vítor Sequeira. "Global matching of point clouds for scan registration and loop detection." Robotics and Autonomous Systems 123 (January 2020): 103324. http://dx.doi.org/10.1016/j.robot.2019.103324.

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32

Sutherland, William J., Steven Broad, Stuart H. M. Butchart, Stewart J. Clarke, Alexandra M. Collins, Lynn V. Dicks, Helen Doran, et al. "A Horizon Scan of Emerging Issues for Global Conservation in 2019." Trends in Ecology & Evolution 34, no. 1 (January 2019): 83–94. http://dx.doi.org/10.1016/j.tree.2018.11.001.

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Sutherland, William J., Maria P. Dias, Lynn V. Dicks, Helen Doran, Abigail C. Entwistle, Erica Fleishman, David W. Gibbons, et al. "A Horizon Scan of Emerging Global Biological Conservation Issues for 2020." Trends in Ecology & Evolution 35, no. 1 (January 2020): 81–90. http://dx.doi.org/10.1016/j.tree.2019.10.010.

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Astrup, Rasmus, Mark J. Ducey, Aksel Granhus, Tim Ritter, and Nikolas von Lüpke. "Approaches for estimating stand-level volume using terrestrial laser scanning in a single-scan mode." Canadian Journal of Forest Research 44, no. 6 (June 2014): 666–76. http://dx.doi.org/10.1139/cjfr-2013-0535.

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The most efficient way to obtain stand inventory data with terrestrial laser systems (TLS) is with the single-scan mode, which involves taking one scan at a single point. With a single-scan setup, there will be a nondetection of trees in a plot and the representation of the individual trees will be incomplete. We explore how stand-level volume estimates, based on the single-scan mode, perform compared with standard inventory estimates. We base our study on 166 plots in 12 mature stands dominated by Scots pine (Pinus sylvestris L.) and Norway spruce (Picea abies L. Karst) in southern Norway. First, we compare individual-tree volume estimates from TLS with estimates from volume functions and measurements from harvesters. We show that individual-tree volumes can be estimated with high precision and accuracy with TLS in single-scan mode. Secondly, we test three approaches for correction of nondetection relying on model-based estimates of the detection probability obtained by point transect sampling estimators. We show that all three approaches adjust for nondetection and yield stand-level volume estimates that are similar to those obtained by fixed-area sampling. In conclusion, our results indicate that stand-level volume estimates, based on single-scan mode TLS data, perform well compared with standard inventory estimates.

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Cheng, Fang, Shaowei Fu, and Ziran Chen. "Surface Texture Measurement on Complex Geometry Using Dual-Scan Positioning Strategy." Applied Sciences 10, no. 23 (November 26, 2020): 8418. http://dx.doi.org/10.3390/app10238418.

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In this paper, a surface measurement method based on dual-scan positioning strategy is presented to address the challenges of irregular surface patterns and complex geometries. A confocal sensor with an internal scanning mechanism was used in this study. By synchronizing the local scan, enabled by the internal actuator in the confocal sensor, and the global scans, enabled by external positioners, the developed system was able to perform noncontact line scan and area scan. Thus, this system was able to measure both surface roughness and surface uniformity. Unlike laboratory surface measurement equipment, the proposed system is reconfigurable for in situ measurement and able to scan free-form surfaces with a proper stand-off distance and approaching angle. For long-travel line scan, which is needed for rough surfaces, a surface form tracing algorithm was developed to ensure that the data were always captured within the sensing range of the confocal sensor. It was experimentally verified that in a scanning length of 100 mm, where the surface fluctuation in vertical direction is around 10 mm, the system was able to perform accurate surface measurement. For area scan, XY coordinates provided by the lateral positioning system and the Z coordinate captured by the confocal sensor were plotted into one coordinate system for 3D reconstruction. A coherence scanning interferometer and a confocal microscope were employed as the reference measurement systems to verify the performance of the proposed system in a scanning area of 1 mm by 1 mm. Experimental data showed that the proposed system was able to achieve comparable accuracy with laboratory systems. The measurement deviation was within 0.1 µm. Because line scan mechanisms are widely used in sensor design, the presented work can be generalized to expand the applications of line scan sensors.

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Dean, Andrew Peter, Domenic Higgs, Peter Robins, Paul Stobie, Philip Craven, Ciara Daly, and Samantha Carija. "Fluoropyrimidine-associated myocardial toxicity as a global metabolic effect compared to vascular spasm and visibility on FDG PET scanning." Journal of Clinical Oncology 35, no. 15_suppl (May 20, 2017): e14013-e14013. http://dx.doi.org/10.1200/jco.2017.35.15_suppl.e14013.

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e14013 Background: Myocardial toxicity from fluoropyrimidines is a rare but potentially serious side effect, estimated by some as occurring in up to 9%. Coronary spasm has been suggested as the underlying mechanism, despite a lack of supporting evidence and other toxicity mechanisms have been proposed. Matsubara described Krebs cycle dysfunction in the presence of 5FU with depletion of high energy phosphate compounds in rodent myocardial tissue with ECG changes. Following a chance discovery of abnormal myocardial FDG uptake on a PET scan shortly after presenting with presumed 5FU cardiac toxicity (angina, ST elevation, troponin rise; normal coronary vessels on imaging), we prospectively evaluated all instances of angina occurring during 5FU infusion with coronary artery imaging and FDG PET scan. Methods: We identified 5 patients who experienced angina during 5FU therapy. They were investigated for coronary ischaemia and also underwent PET scanning to assess myocardial FDG uptake. Data was collected from patient records, and subsequent cardiac investigations. Results: In all 5 cases, PET scan demonstrated markedly abnormal FDG uptake throughout the myocardium, with the ventricular blood pool demonstrating more FDG activity than myocardium. No significant underlying coronary artery disease was identified. All 5 patients had previous PET scans with normal myocardial FDG uptake. Conclusions: We identified a consistent pattern of abnormal FDG uptake throughout the myocardium for all scanned patients with chest pain following administration of 5FU. This was not restricted to a single arterial territory. There were no typical ECG changes of spasm. Obstructive coronary disease was excluded with angiographic imaging or myocardial perfusion scanning. The FDG PET scans suggest global myocardial metabolic change, supporting the notion of 5FU being a direct myocardial toxin inhibiting myocardial glucose utilization. The myocardium may then be dependent on fatty acid metabolism, posing additional risk to patients on low fat diets. Our data provides new insight into the mechanism of 5-FU myocardial toxicity and further prospective assessment using PET is warranted.

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37

Buzlov, N. A. "Scan Matching for Navigation of a Mobile Robot in Semi-Structured Terrain Conditions." Mekhatronika, Avtomatizatsiya, Upravlenie 22, no. 5 (May 17, 2021): 246–53. http://dx.doi.org/10.17587/mau.22.246-253.

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To ensure unmanned autonomous movement of ground robotic means, it is required to accurately determine the position and orientation of the robot. The present study is related to the estimation of coordinates by comparing the scans of a laser scanning rangefinder in conditions of semi-structed infrastructure and the absence of a global satellite communications signal. The existing methods of comparing scans have significant drawbacks in the conditions of movement over a semi-structured terrain, associated both with the processing time of data from the laser scanning rangefinder, and with the quality of the results obtained. The scan is preliminarily placed in a map consisting of cells. Each cell of around point scan is described by forces represented by the laws of physics or probability theory. In the cells of the map, we take into account the mutual influence of all forces from each point of the scan and thus we obtain the resulting artificial potential field of the scan. The position of the robot is estimated by the change in the number of acting forces of one scan per points of the next scan taking into account their direction. We estimate the orientation of the robot based on the sum of the vector products of the forces and distances to the given forces acting on the points of the next scan. This method allows you to calculate the displacement of the robot between scans regardless of road conditions and terrain. This article presents the results of an experimental verification of the method on a mock-up of a mobile robot equipped with a Velodyne HDL-32 LIDAR. We indicate the operating conditions of the method for a given LIDAR, as well as the time spent on calculating the bias estimate. Given the peculiarities of the LIDAR, we present a method for eliminating the Doppler Effect (distortion) for the original point cloud. A comparative analysis of the developed method for integrating wheel odometry data, inertial and satellite navigation using the Extended Kalman Filter shows the applicability of this method to assess the position and orientation of the robot in conditions of its movement over rough terrain.

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38

Riemann, J., R. Kleiber, M. Borchardt, and C. Slaby. "Microinstability simulations for stellarators involving kinetic electrons and realistic profiles." Plasma Physics and Controlled Fusion 64, no. 10 (August 26, 2022): 104004. http://dx.doi.org/10.1088/1361-6587/ac89ef.

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Abstract In this work, linear simulation results obtained with the global particle-in-cell code EUTERPE are applied to plasmas with both adiabatic and kinetic electrons in a Wendelstein 7-X magnetic configuration. Special attention is paid to challenges arising from the need to design realistic and consistent gradient scans on realistic profiles used in global simulations. Results obtained in a pressure-preserving gradient scan performed with kinetic electrons suggest a strong impact of a finite density gradient on the growth of electron-driven instabilities below the ion-temperature-gradient stability limit. Power transfer diagnostics are used to identify the nature of the coexisting driving mechanisms.

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Santagati, Giulia, Emanuela Cataldo, Valeria Columbano, Antoine Chatrenet, Daniele Penna, Ettore Pelosi, Mammar Hachemi, et al. "Positron Emission Tomography Can Support the Diagnosis of Dialysis-Related Amyloidosis." Journal of Clinical Medicine 8, no. 9 (September 19, 2019): 1494. http://dx.doi.org/10.3390/jcm8091494.

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Background: The improvements in dialysis have not eliminated long-term problems, including dialysis-related amyloidosis (DRA), caused by Beta-2 microglobulin deposition. Several types of scintigraphy have been tested to detect DRA, none entered the clinical practice. Aim of the study was to assess the potential of PET-FDG scan in the diagnosis of DRA. Methods: Forty-six dialysis patients with at least one PET scan (72 scans) were selected out 162 patients treated in 2016–2018. Subjective global assessment (SGA), malnutrition inflammation score (A), Charlson Comorbidity Index (CCI), were assessed at time of scan; 218 age-matched cases with normal kidney function were selected as controls. PET scans were read in duplicate. Carpal tunnel syndrome was considered a proxy for DRA. A composite “amyloid score” score considered each dialysis year = 1 point; carpal tunnel-DRA = 5 points per site. Logistic regression, ROC curves and a prediction model were built. Results: The prevalence of positive PET was 43.5% in dialysis, 5% in controls (p < 0.0001). PET was positive in 14/15 (93.3%) scans in patients with carpal tunnel. PET sensitivity for detecting DRA was 95% (specificity 64%). Carpal tunnel was related to dialysis vintage and MIS. A positive PET scan was significantly associated with dialysis vintage, MIS and amyloid score. A prediction model to explain PET positivity combined clinical score and MIS, allowing for an AUC of 0.906 (CI: 0.813–0.962; p < 0.001). Conclusions: PET-FDG may identify DRA, and may be useful in detecting cases in which inflammation favours B2M deposition. This finding, needing large-scale confirmation, could open new perspectives in the study of DRA.

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Bhalerao, R. H., S. S. Gedam, and J. Joglekar. "Scan line optimization for Tri stereo planetary images." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-3 (August 11, 2014): 33–37. http://dx.doi.org/10.5194/isprsarchives-xl-3-33-2014.

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In this paper, we propose a new scan line optimization method for matching the triplet of images. In the present paper, the triplets are initially matched using an area based local method. The cost is stored in a structure called as the Disparity Space Image (DSI). Using the global minimum of this cost the initial disparity is generated. Next the local minima are considered as potential matches where global minimum gives erroneous results. These local minima are used for optimization of disparity. As the method is a scanned line optimization, it use popularly resampled images. The experiment is performed using Terrain Mapping Camera images from the Chandrayaan-1 mission. In order to validate the result for accuracy, Lunar Orbiter Laser Altimeter dataset from Lunar Reconnaissance Orbiter mission is used. The method is again verified using standard Middlebury stereo dataset with ground truth. From experiments, it has been observed that using optimization technique for triplets, the total number of correct matches has increased by 5–10 % in comparison to direct methods. The method particularly gives good results at smooth regions, where dynamic programming and blockmatching gives limited accuracy.

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Kartika, Merry, Mochamad Iskandarsyah Agung Ramadhan, Sujie Pratiwi, and Yudhisman Imran. "MASSA MULTIPEL SEREBRI DISERTAI HIDROSEFALUS PADA DUGAAN MENINGITIS TUBERKULOSIS." JURNAL PENELITIAN DAN KARYA ILMIAH LEMBAGA PENELITIAN UNIVERSITAS TRISAKTI 6, no. 2 (June 26, 2021): 165–71. http://dx.doi.org/10.25105/pdk.v6i2.9522.

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Objektif: Mendiagnosis gambaran masa multipel pada Computerized Tomography (CT) scan non-kontras pasien dengan dugaan meningitis tuberkulosis (MTB).Ilustrasi Kasus: Laki-laki, 34 tahun, dibawa keluarganya ke Unit Gawat Darurat (UGD) dengan keluhan kelemahan tubuh pada sisi kanan sejak 2 hari yang lalu. Keluhan nyeri kepala, demam, penurunan berat badan, batuk lama dan keringat malam dikeluhkan pasien sejak 2 bulan. Pemeriksaan neurologi ditemukan Glasgow Coma Scale (GCS) E4M5Vafasia global. Rangsang meningeal (+). Kekuatan motorik kesan hemiparese dekstra, Laboratorium darah: leukositosis, anti Human Immunodeficiency Virus (HIV) rapid (-). Rontgen thorax didapatkan bronkopneumonia bilateral dan efusi pleura et causa TB. CT scan kepala non-kontras didapatkan lesi heterogen hipo-hiperdens pada white matter lobus frontal dan temporal kiri, hidrosefalus komunikans ringan disertai tanda-tanda edema hemisfer serebri sinistra.Hasil Diskusi: Pasien ini didapatkan tanda infeksi TB disertai kaku kuduk dan adanya gambaran hidrosefalus pada CT scan kepala non-kontras sehingga diduga sebagai MTB. Hemiparesis dextra dan afasia global dapat disebabkan oleh massa multipel di frontal dan temporal sinistra yang pada CT scan kepala non-kontras dapat difikirkan sebagai tuberkuloma. Tuberkuloma biasanya soliter namun dapat multipel pada 15-34% kasus.1 Gambaran tuberkuloma pada CT scan kepala non-kontras tidak spesifik, dapat berupa massa hipodens, isodens, hiperdens, atau campuran. Apabila dilakukan CT scan kepala dengan pemberian kontras didapatkan penyengatan berbentuk cincin inhomogen, disertai adanya gambaran ventrikulitis.Kesimpulan: Penegakan diagnosis Tuberkuloma pada METB dilakukan dengan berdasarkan manifestasi klinis dan gambaran radiologis CT scan atau Magnetic Resonance Imaging (MRI) kepala yang sebaiknya dilakukan dengan kontras.

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Kong, Feng, Ke Ding, Zetian Yang, Xiaobin Dang, Siyuan Hu, Yiying Song, and Jia Liu. "Examining gray matter structures associated with individual differences in global life satisfaction in a large sample of young adults." Social Cognitive and Affective Neuroscience 10, no. 7 (December 10, 2014): 952–60. http://dx.doi.org/10.1093/scan/nsu144.

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Modinos, Gemma, Huai-Hsuan Tseng, Irina Falkenberg, Carly Samson, Philip McGuire, and Paul Allen. "Neural correlates of aberrant emotional salience predict psychotic symptoms and global functioning in high-risk and first-episode psychosis." Social Cognitive and Affective Neuroscience 10, no. 10 (March 25, 2015): 1429–36. http://dx.doi.org/10.1093/scan/nsv035.

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Chen, Yu-Kai, Hong-Wen Hsu, Chau-Chung Song, and Yu-Syun Chen. "High-Flexibility MPPT Techniques with Communication Scan Network for PV Micro-Grid System." Processes 10, no. 1 (January 7, 2022): 117. http://dx.doi.org/10.3390/pr10010117.

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This paper proposes the design and implementation of inductor-inductor-capacitor (LLC) converters with modules connected in series with the power scan method and communication scan network (CSN) to achieve MPPT and regulate the output voltage for the PV micro-grid system. The Dc/Dc converters includes six isolated LLC modules in series to supply ±380 V output voltage and track the maximum power point of the PV system. The series LLC converters are adopted to achieve high efficiency and high flexibility for the PV micro-grid system. The proposed global maximum power scan technique is implemented to achieve global maximum power tracking by adjusting the switching frequency of the LLC converter. To improve the system flexibility and achieve system redundancy, module failure can be detected in real time with a communication scan network, and then the output voltage of other modules will be changed by adjusting the switching frequency to maintain the same voltage as before the failure. Additionally, the proposed communication scan network includes the RS-485 interface of the MPPT series module and the CAN BUS communication interface with other subsystems’ communication for the PV micro-grid application system. Finally, a 6 kW MPPT prototype with a communication scan network is implemented and the proposed control method is verified for the PV system.

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Lv, Yanli, Yuanlong Li, Shuang Xiang, and Chunhe Xia. "Coordinated scan detection algorithm based on the global characteristics of time sequence." International Journal of Computational Science and Engineering 16, no. 1 (2018): 42. http://dx.doi.org/10.1504/ijcse.2018.089576.

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Xiang, Shuang, Chunhe Xia, Yuanlong Li, and Yanli Lv. "Coordinated scan detection algorithm based on the global characteristics of time sequence." International Journal of Computational Science and Engineering 16, no. 1 (2018): 42. http://dx.doi.org/10.1504/ijcse.2018.10010355.

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Yakushiji, Yusuke, Tomoyuki Noguchi, Andreas Charidimou, Makoto Eriguchi, Masashi Nishihara, Megumi Hara, Yusuke Nanri, et al. "Basal Ganglia Cerebral Microbleeds and Global Cognitive Function: The Kashima Scan Study." Journal of Stroke and Cerebrovascular Diseases 24, no. 2 (February 2015): 431–39. http://dx.doi.org/10.1016/j.jstrokecerebrovasdis.2014.09.015.

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Sutherland, William J., Erica Fleishman, Mick Clout, David W. Gibbons, Fiona Lickorish, Lloyd S. Peck, Jules Pretty, Mark Spalding, and Nancy Ockendon. "Ten Years On: A Review of the First Global Conservation Horizon Scan." Trends in Ecology & Evolution 34, no. 2 (February 2019): 139–53. http://dx.doi.org/10.1016/j.tree.2018.12.003.

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MARULLO, OSVALDO, ALESSIO SOGGIU, and ENRICO CAPOBIANCO. "TWO-DIMENSIONAL ELECTROPHORESIS GEL IMAGES SCAN FOR DECOMPOSITION AND DEPLETION ANALYSIS." Advances in Adaptive Data Analysis 02, no. 03 (July 2010): 359–71. http://dx.doi.org/10.1142/s1793536910000525.

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Two-dimensional Electrophoresis Gel Images Scan (2dEGIS) implements a mix of computational methods for processing two-dimensional electrophoresis gel images. For advancing the analysis in case-control sample studies, a multi-component decomposition-approximation approach is presented, based on: (1) A global scan aimed to detect discriminative patterns with just a few components; (2) A more localized image scan through aggregated components; (3) The exploration of specific regions with maximal localization power. The tool 2dEGIS represents a novel unifying instrument for the computational analysis of gel images.

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Garrett, R. C., K. J. Peters, and M. A. Zikry. "In-situ impact-induced damage assessment of woven composite laminates through a fibre Bragg grating sensor network." Aeronautical Journal 113, no. 1144 (June 2009): 357–70. http://dx.doi.org/10.1017/s0001924000003031.

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Abstract Woven composite specimens with embedded fibre Bragg grating (FBG) sensor networks were impacted at low velocities, while global measurements of contact forces and dissipated energies were obtained from drop tower measurements, and local residual, post-impact strain values were obtained from the FBG sensors. Critical damage events were identified in the global data for these specimens and damage signatures in the residual strain data corresponding to these critical damage events were correlated. The results indicate that the full spectral scan information from the sensor network, although obtainable at a lower scan rate, provide more reliable residual lifetime information than average residual strains.

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