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Journal articles on the topic 'Coherence region'

Author: Grafiati

Published: 30 May 2022

Last updated: 31 July 2025

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1

Jung, Jungkyo, and Sang-Ho Yun. "Evaluation of Coherent and Incoherent Landslide Detection Methods Based on Synthetic Aperture Radar for Rapid Response: A Case Study for the 2018 Hokkaido Landslides." Remote Sensing 12, no. 2 (2020): 265. http://dx.doi.org/10.3390/rs12020265.

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Damage mapping using Synthetic Aperture Radar (SAR) imagery has been studied in recent decades to support rapid response to natural disasters. Many researches have been developing coherent and incoherent change detection. However, their performances can vary depending on the types of the damages, the characteristics of the scatterers and the corresponding capability of algorithms. In particular, the coherence-based methods have been used as promising detectors over urban areas where high coherences are observed, but their detection accuracies still remain controversial over the area where low

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Mancia, Giuseppe, Gianfranco Parati, Paolo Castiglioni, and Marco di Rienzo. "Effect of sinoaortic denervation on frequency-domain estimates of baroreflex sensitivity in conscious cats." American Journal of Physiology-Heart and Circulatory Physiology 276, no. 6 (1999): H1987—H1993. http://dx.doi.org/10.1152/ajpheart.1999.276.6.h1987.

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In animals and humans, baroreceptor modulation of the sinus node in daily life can be studied by identification of the number of sequences in which systolic blood pressure (SBP) and pulse interval (PI) linearly decrease or increase for several beats. It is also studied by power spectral analysis of SBP and PI in regions where their powers are coherent, although, in contrast to the sequence method, whether this frequency-domain method specifically reflects the baroreceptor-heart rate reflex has not been adequately tested. We recorded intra-arterial BP for ∼3.5 h in eight conscious cats, first i

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Neupane, Sujaya, Daniel Guitton, and Christopher C. Pack. "Coherent alpha oscillations link current and future receptive fields during saccades." Proceedings of the National Academy of Sciences 114, no. 29 (2017): E5979—E5985. http://dx.doi.org/10.1073/pnas.1701672114.

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Oscillations are ubiquitous in the brain, and they can powerfully influence neural coding. In particular, when oscillations at distinct sites are coherent, they provide a means of gating the flow of neural signals between different cortical regions. Coherent oscillations also occur within individual brain regions, although the purpose of this coherence is not well understood. Here, we report that within a single brain region, coherent alpha oscillations link stimulus representations as they change in space and time. Specifically, in primate cortical area V4, alpha coherence links sites that en

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Pickering, Andy, Matthew Alford, Jonathan Nash, et al. "Structure and Variability of Internal Tides in Luzon Strait." Journal of Physical Oceanography 45, no. 6 (2015): 1574–94. http://dx.doi.org/10.1175/jpo-d-14-0250.1.

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AbstractThe Luzon Strait is the generation region for strong internal tides that radiate westward into the South China Sea and eastward into the western Pacific. Intrusions of the Kuroshio and strong mesoscale variability in the Luzon Strait can influence their generation and propagation. Here, the authors use eight moorings and two numerical models to investigate these relationships by quantifying the coherence of the diurnal and semidiurnal internal tides in the Luzon Strait. This study finds that the level of coherence of internal tide generation, energy, and energy flux is quite variable,

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Cantin, J. F., J. E. Smith, M. H. Lipasti, A. Moshovos, and B. Falsafi. "Coarse-Grain Coherence Tracking: RegionScout and Region Coherence Arrays." IEEE Micro 26, no. 1 (2006): 70–79. http://dx.doi.org/10.1109/mm.2006.8.

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Zuljan Kumar, Danila. "Strategies for establishing discourse coherence. The case of Slovene dialectal discourse." Dialectologia et Geolinguistica 30, no. 1 (2022): 51–68. http://dx.doi.org/10.1515/dialect-2022-0003.

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Abstract A discourse is considered coherent only if all its parts are semantically related to each other and if it makes sense. However, coherence cannot be attributed to a discourse in advance because it depends on how the participants understand what they hear/ read. So we can say that it is not the discourse that establishes coherence, but the participants according to their understanding of a discourse. In practise, this means that for the same discourse there are at least two coherences that may or may not match up. Usually they match up to some extent because participants follow the coop

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Markovska-Simoska, Silvana, Nada Pop-Jordanova, and Jordan Pop-Jordanov. "Inter- and Intra-Hemispheric EEG Coherence Study in Adults with Neuropsychiatric Disorders." PRILOZI 39, no. 2-3 (2018): 5–19. http://dx.doi.org/10.2478/prilozi-2018-0037.

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Abstract Functional connectivity between different regions of the brain in the resting state has been a recent topic of interest in neurophysiological research. EEG coherence happened to be an useful tool for measuring changes in neuro-psycho-physiological functioning which are not detectable by simply measuring amplitude or power spectra. The aim of our study was to investigate the changes in the EEG coherence in groups of different mental disorders such as: depression, general anxiety disorder, ADHD, Asperger syndrome and headaches, compared to control group. All measures were made in two co

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Luccio, A., G. Matone, L. Miceli, and G. Giordano. "Coherent backscattering in the soft X-ray region." Laser and Particle Beams 8, no. 3 (1990): 383–98. http://dx.doi.org/10.1017/s0263034600008636.

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Coherent X rays can be produced by Compton scattering of laser light on a relativistic electron beam, whose current is periodically modulated by the same laser radiation in a suitable miniundulator. If electron and laser photon energy are properly matched, the modulated electron beam acts as a moving diffraction grating and the X rays show a high degree of coherence. A practical implementation of this scheme is shown.

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McDougall, A. K., and Lisa Phillips. "The Antecedents to Cascadia as a Cross Border Region." Canadian Political Science Review 2, no. 2 (2008): 6–20. http://dx.doi.org/10.24124/c677/200856.

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For the short period from 1834 to 1863, the Pacific Northwest, centered in Cascadia, was an entity in the global economy. The region became a coherent economic unit under the management of the Columbia District of the Hudson’s Bay Company, which developed an economic hinterland, a coherent economic and trade strategy, an aggressive marketing agenda and control of marketable resources in the region. It strategically built a resource base to meet market needs and played an extensive entrepreneurial function, for example selling Finish boots in California in 1840 and Puget Sound grain in western

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Singer, Andrej, and Ivan A. Vartanyants. "Coherence properties of focused X-ray beams at high-brilliance synchrotron sources." Journal of Synchrotron Radiation 21, no. 1 (2013): 5–15. http://dx.doi.org/10.1107/s1600577513023850.

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An analytical approach describing properties of focused partially coherent X-ray beams is presented. The method is based on the results of statistical optics and gives both the beam size and transverse coherence length at any distance behind an optical element. In particular, here Gaussian Schell-model beams and thin optical elements are considered. Limiting cases of incoherent and fully coherent illumination of the focusing element are discussed. The effect of the beam-defining aperture, typically used in combination with focusing elements at synchrotron sources to improve transverse coherenc

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Sun, Weihong, Xiangyu Meng, Junchao Ren, Huainan Yu, and Yong Wang. "Research on the Vortex States of Partially Coherent Vortex Beams." Photonics 12, no. 4 (2025): 358. https://doi.org/10.3390/photonics12040358.

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The Mutual Optical Intensity (MOI) model is further developed to simulate the propagation of partially coherent X-ray vortex beams through free space. The intensity, phase, and amplitude distributions of the degree of coherence in the far field zone are numerically calculated using the MOI model. The effects of the coherence property and topological charge on the vortex beam are analyzed. For Gaussian Schell-model vortex beams, a vortex structure appears around the coherence singularity at the amplitude distribution of the degree of coherence relative to the central point. The number and rotat

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Jitendra, Kumawat, Singh Jitendra, Saxena Sandeep, Yadav Anuradha, and Yadav Kavita. "An Electroencephalographic Analysis of Real and Imaginary Motor Task by Gamma Power Coherence." International Journal of Pharmaceutical and Clinical Research 15, no. 9 (2023): 879–83. https://doi.org/10.5281/zenodo.11358646.

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<strong>Objective:</strong> The purpose of this study was to evaluate and compare the power spectrum coherence of the gamma band during the resting state, actual motor movement, and imagined motor movement. <strong>Methods:</strong> This laboratory-based comparative analytic observational investigation was conducted at S.M.S. Medical College and Attached Hospitals in Jaipur. A total of 56 healthy males between the ages of 18 and 40 were recruited from Jaipur city. The gamma band coherence was recorded by EEG for resting, real, and imaginary motor tasks and the coherence was comp

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Schoeller, Henry, Robin Chemnitz, Péter Koltai, Maximilian Engel, and Stephan Pfahl. "Assessing Lagrangian coherence in atmospheric blocking." Nonlinear Processes in Geophysics 32, no. 1 (2025): 51–73. https://doi.org/10.5194/npg-32-51-2025.

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Abstract. Atmospheric blocking exerts a major influence on mid-latitude atmospheric circulation and is known to be associated with extreme weather events. Previous work has highlighted the importance of the origin of air parcels that define the blocking region, especially with respect to non-adiabatic processes such as latent heating. So far, an objective method of clustering the individual Lagrangian trajectories passing through a blocking into larger and, more importantly, spatially coherent air streams has not been established. This is the focus of our study. To this end, we determine coher

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Webb, Spahr C., and Steven C. Constable. "Microseism propagation between two sites on the deep seafloor." Bulletin of the Seismological Society of America 76, no. 5 (1986): 1433–45. http://dx.doi.org/10.1785/bssa0760051433.

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Abstract Pressure and electric field fluctuations detected at two sites separated by a distance of 32 km on the deep seafloor are found to be partially coherent at frequencies between 0.05 and 0.6 Hz. The phase relationships observed between the two sites suggest coherent wave trains from three source regions produce the observed coherence. Plausible estimates for the azimuths to the sources can be obtained if Rayleigh wave phase velocities are assumed. Each source region is associated with a different peak in the power spectra of the pressure and electric field fluctuations. One source region

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Liu, Pusheng, Huajun Yang, Jian Rong, Gang Wang, and Yimin Yan. "Coherence vortex evolution of partially coherent vortex beams in the focal region." Optics & Laser Technology 42, no. 1 (2010): 99–104. http://dx.doi.org/10.1016/j.optlastec.2009.05.004.

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Ma, Guanyu, Qing Zhao, Qiang Wang, and Min Liu. "On the Effects of InSAR Temporal Decorrelation and Its Implications for Land Cover Classification: The Case of the Ocean-Reclaimed Lands of the Shanghai Megacity." Sensors 18, no. 9 (2018): 2939. http://dx.doi.org/10.3390/s18092939.

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In this work, we focused on the ocean-reclaimed lands of the Shanghai coastal region and we evidenced how, over these areas, the interferometric synthetic aperture radar (InSAR) coherence maps exhibit peculiar behavior. In particular, by analyzing a sequence of Sentinel-1 SAR InSAR coherence maps, we found a significant coherence loss over time in correspondence to the ocean-reclaimed platforms that are substantially different from the coherence loss experienced in naturally-formed regions with the same type of land cover. We have verified whether this is due to the engineering geological cond

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LEE, G. J., K. HARA, M. KATSURAGAWA, and K. HAKUTA. "NONLINEAR FREQUENCY CONVERSION BY RAMAN COHERENCE PREPARED IN SOLID HYDROGEN FILM." Journal of Nonlinear Optical Physics & Materials 13, no. 03n04 (2004): 433–37. http://dx.doi.org/10.1142/s0218863504002092.

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We investigated the Raman coherence characteristics in the solid hydrogen film deposited on a sapphire substrate. By using Raman coherence prepared with two single-frequency pulsed lasers, we generated the multiorder coherent Raman sidebands in solid hydrogen film. High-order Raman sidebands were obtained under strong pumping conditions (≥230 MW/cm2). The generated anti-Stokes(AS)–Raman sidebands extended from ultraviolet (292 nm for AS5 band) to visible (565 nm for AS1 band) region. The multiorder Raman sideband generation is thought to be due to the parametric coupling of pump and coupling l

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Villarroya-Carpio, Arturo, and Juan M. Lopez-Sanchez. "Multi-Annual Evaluation of Time Series of Sentinel-1 Interferometric Coherence as a Tool for Crop Monitoring." Sensors 23, no. 4 (2023): 1833. http://dx.doi.org/10.3390/s23041833.

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Interferometric coherence from SAR data is a tool used in a variety of Earth observation applications. In the context of crop monitoring, vegetation indices are commonly used to describe crop dynamics. The most frequently used vegetation indices based on radar data are constructed using the backscattered intensity at different polarimetric channels. As coherence is sensitive to the changes in the scene caused by vegetation and its evolution, it may potentially be used as an alternative tool in this context. The objective of this work is to evaluate the potential of using Sentinel-1 interferome

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Zhang, Xiangrong, Yunpeng Li, Xin Wang, et al. "Multi-Source Interactive Stair Attention for Remote Sensing Image Captioning." Remote Sensing 15, no. 3 (2023): 579. http://dx.doi.org/10.3390/rs15030579.

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The aim of remote sensing image captioning (RSIC) is to describe a given remote sensing image (RSI) using coherent sentences. Most existing attention-based methods model the coherence through an LSTM-based decoder, which dynamically infers a word vector from preceding sentences. However, these methods are indirectly guided through the confusion of attentive regions, as (1) the weighted average in the attention mechanism distracts the word vector from capturing pertinent visual regions and (2) there are few constraints or rewards for learning long-range transitions. In this paper, we propose a

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Bradley, Holly, Beth A. Smith, and Ran Xiao. "Associations between EEG power and coherence with cognition and early precursors of speech and language development across the first months of life." PLOS ONE 19, no. 4 (2024): e0300382. http://dx.doi.org/10.1371/journal.pone.0300382.

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The neural processes underpinning cognition and language development in infancy are of great interest. We investigated EEG power and coherence in infancy, as a reflection of underlying cortical function of single brain region and cross-region connectivity, and their relations to cognition and early precursors of speech and language development. EEG recordings were longitudinally collected from 21 infants with typical development between approximately 1 and 7 months. We investigated relative band power at 3-6Hz and 6-9Hz and EEG coherence of these frequency ranges at 25 electrode pairs that cov

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Camacho Linares, Edwin, Luiz Benyosef, Odim Mendes, and Margarete Oliveira Domingues. "Analysis of coherence areas between conjugate stations affected by the South Atlantic Magnetic Anomaly." Pesquisas em Geociências 51, no. 3 (2024): e140792. https://doi.org/10.22456/1807-9806.140792.

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The South Atlantic Magnetic Anomaly (SAMA) is a region in the South Atlantic Ocean where the Earth's magnetic field is significantly weaker than in other parts of the world. This anomaly has been of interest to scientists and researchers studying the Earth's magnetic field. The SAMA can affect navigation systems and satellite operations, and it is an important area of study for understanding the dynamics of the Earth's magnetic field. This paper investigates the signal characteristics of conjugate stations influenced by the SAMA in a moderate geomagnetic storm through record analysis of geomag

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Das, Anwesha, Alexandra Mandel, Hitoshi Shitara, et al. "Evaluating interhemispheric connectivity during midline object recognition using EEG." PLOS ONE 17, no. 8 (2022): e0270949. http://dx.doi.org/10.1371/journal.pone.0270949.

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Functional integration between two hemispheres is crucial for perceptual binding to occur when visual stimuli are presented in the midline of the visual field. Mima and colleagues (2001) showed using EEG that midline object recognition was associated with task-related decrease in alpha band power (alpha desynchronisation) and a transient increase in interhemispheric coherence. Our objective in the current study was to replicate the results of Mima et al. and to further evaluate interhemispheric effective connectivity during midline object recognition in source space. We recruited 11 healthy ad

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Zhu, Xinlei, Jiayi Yu, Fei Wang, Yahong Chen, and Yangjian Cai. "Super cosh-Gauss nonuniformly correlated radially polarized beam and its propagation characteristics." Optics Express 30, no. 17 (2022): 30857. http://dx.doi.org/10.1364/oe.468349.

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In this paper, a new kind of partially coherent vector beam termed as super cosh-Gauss nonuniformly correlated radially polarized (SCNRP) beam is introduced. Such beam source exhibits almost perfect coherence between two points that are within the beam center region or located on a ring concentric with the beam center. However, the coherence drops or even vanishes when the two points leave the central region and are located on the concentric rings with different radii. The second-order statistical properties, such as the spectral density, the state of polarization (SOP), and the degree of pola

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Zhang, Yue, Kun Fu, Xian Sun, Guangluan Xu, and Hongqi Wang. "MODEL ACCURACY COMPARISON FOR HIGH RESOLUTION INSAR COHERENCE STATISTICS OVER URBAN AREAS." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B7 (June 21, 2016): 753–56. http://dx.doi.org/10.5194/isprs-archives-xli-b7-753-2016.

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The interferometric coherence map derived from the cross-correlation of two complex registered synthetic aperture radar (SAR) images is the reflection of imaged targets. In many applications, it can act as an independent information source, or give additional information complementary to the intensity image. Specially, the statistical properties of the coherence are of great importance in land cover classification, segmentation and change detection. However, compared to the amount of work on the statistical characters of SAR intensity, there are quite fewer researches on interferometric SAR (I

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Zhang, Yue, Kun Fu, Xian Sun, Guangluan Xu, and Hongqi Wang. "MODEL ACCURACY COMPARISON FOR HIGH RESOLUTION INSAR COHERENCE STATISTICS OVER URBAN AREAS." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B7 (June 21, 2016): 753–56. http://dx.doi.org/10.5194/isprsarchives-xli-b7-753-2016.

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The interferometric coherence map derived from the cross-correlation of two complex registered synthetic aperture radar (SAR) images is the reflection of imaged targets. In many applications, it can act as an independent information source, or give additional information complementary to the intensity image. Specially, the statistical properties of the coherence are of great importance in land cover classification, segmentation and change detection. However, compared to the amount of work on the statistical characters of SAR intensity, there are quite fewer researches on interferometric SAR (I

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Saparudin, Saparudin, and Ghazali Sulong. "Segmentation of Fingerprint Image Based on Gradient Magnitude and Coherence." International Journal of Electrical and Computer Engineering (IJECE) 5, no. 5 (2015): 1202. http://dx.doi.org/10.11591/ijece.v5i5.pp1202-1215.

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Fingerprint image segmentation is an important pre-processing step in automatic fingerprint recognition system. A well-designed fingerprint segmentation technique can improve the accuracy in collecting clear fingerprint area and mark noise areas. The traditional grey variance segmentation method is widely and easily used, but it can hardly segment fingerprints with low contrast of high noise. To overcome the low image contrast, combining two-block feature; mean of gradient magnitude and coherence, where the fingerprint image is segmented into background, foreground or noisy regions, has been d

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Zanata, Igor Martins, Vicente de Paulo Santos De Oliveira, and Wagner Rambaldi Telles. "The use of Computational Modeling for Simulation and Comparison of Digital Elevation Models in Northwest Fluminense. Case Study: Pomba River and Paraíba do Sul River." Revista de Gestão Social e Ambiental 18, no. 4 (2023): e04610. http://dx.doi.org/10.24857/rgsa.v18n4-001.

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Purpose: The work proposes the location, simulation and comparison of Digital Elevation Models (DEM) in a section where the Pomba River and the Paraíba do Sul River meet, located in the northwest of the state of Rio de Janeiro, a region known for the reproduction of some species of fish threatened with extinction.  Methods: Searches for DEMs in the region were carried out on a free website, where a total of 10 DEMs were found. Several hydraulic simulations were carried out using computer modeling software called Iber, to verify the veracity and coherence of the data available.&#x0D

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Ghantasala, Ramya, and Gregory L. Holmes. "Benign Rolandic epilepsy: widespread increases in connectivity in a focal epilepsy syndrome." Epileptic Disorders 21, no. 6 (2019): 567–78. http://dx.doi.org/10.1684/epd.2019.1111.

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ABSTRACT Aim . Benign Rolandic epilepsy (benign epilepsy with centrotemporal spikes; recently renamed self‐limited epilepsy with centrotemporal spikes) is associated with widespread deficits in cognition and behavior, suggesting abnormalities in networks that extend beyond the centrotemporal region. To assess functional connectivity in children with benign Rolandic epilepsy, we assessed EEG spectral power and coherence during awake and sleep records in 27 children with centrotemporal spikes. Coherence represents the consistency of the phase difference between two EEG signals when compared over

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Rahman, Habibur, Hazrat Ali, Rafi Ud Din, Iftikhar Ahmad, Mahidur R. Sarker, and Sawal Hamid Md Ali. "Coherent Surface Plasmon Hole Burning via Spontaneously Generated Coherence." Molecules 26, no. 21 (2021): 6497. http://dx.doi.org/10.3390/molecules26216497.

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Surface plasmon (SP)—induced spectral hole burning (SHB) at the silver-dielectric interface is investigated theoretically. We notice a typical lamb dip at a selective frequency, which abruptly reduces the absorption spectrum of the surface plasmons polaritons (SPP). Introducing the spontaneous generated coherence (SGC) in the atomic medium, the slope of dispersion becomes normal. Additionally, slow SPP propagation is also noticed at the interface. The spectral hole burning dip is enhanced with the SGC effect and can be modified and controlled with the frequency and intensity of the driving fie

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Xiang, Wei, Rui Zhang, Guoxiang Liu, et al. "Saline-Soil Deformation Extraction Based on an Improved Time-Series InSAR Approach." ISPRS International Journal of Geo-Information 10, no. 3 (2021): 112. http://dx.doi.org/10.3390/ijgi10030112.

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Significant seasonal fluctuations could occur in the regional scattering characteristics and surface deformation of saline soil, and cause decorrelation, which limits the application of the conventional time-series InSAR (TS-InSAR). For extending the saline-soil deformation monitoring capability, this paper presents an improved TS-InSAR approach, based on the interferometric coherence statistics and high-coherence interferogram refinement. By constructing a network of the refined interferograms, high-accuracy ground deformation can be extracted through the weighted least square estimation and

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Harada, Hirofumi, Kimio Shiraishi, Toshihiko Kato, and Toyoji Soda. "Coherence analysis of EEG changes during odour stimulation in humans." Journal of Laryngology & Otology 110, no. 7 (1996): 652–56. http://dx.doi.org/10.1017/s0022215100134528.

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AbstractIn a pilot study, EEG changes during odour administration were evaluated by coherence analysis. Ten normal adults were studied. Simultaneous recordings of 16 EEG channels with, and without, odour administration were stored on magnetic tape for further processing. EEG signals were analysed using a signal analyser. Coherence spectra were calculated between all possible channel pairs on the scalp. The amount of data was reduced by extracting broad band coherence values for five frequency bands: delta (2–3.9 Hz), theta (4–7.9 Hz), alpha 1 (8–9.9 Hz), alpha 2 (10–12.9 Hz), and beta 1 (13–17

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He, Z. W., and S. Y. Zhang. "Lip Separate Flow Blowing and Analysis of Coherence of Inlet." Journal of Engineering for Gas Turbines and Power 108, no. 3 (1986): 562–65. http://dx.doi.org/10.1115/1.3239947.

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It is found experimentally that blowing at the lip separation of an inlet obviously reduces the turbulence at the inlet exit, and apparently reduces the intensity of pressure fluctuations caused by the shock-boundary layer interaction downstream of the throat. The coherence between pressure in the interaction region and total pressure at the exit is also reduced. The coherence between the pressure in the lip separation region and total pressure at the exit is 0.32. If, in addition, there is a stronger shock downstream of the throat, the abovementioned coherence is reduced to 0.06.

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Ballicchia, Mauro, David Ferry, Mihail Nedjalkov, and Josef Weinbub. "Investigating Quantum Coherence by Negative Excursions of the Wigner Quasi-Distribution." Applied Sciences 9, no. 7 (2019): 1344. http://dx.doi.org/10.3390/app9071344.

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Quantum information and quantum communication are both strongly based on concepts of quantum superposition and entanglement. Entanglement allows distinct bodies, that share a common origin or that have interacted in the past, to continue to be described by the same wave function until evolution is coherent. So, there is an equivalence between coherence and entanglement. In this paper, we show the relation between quantum coherence and quantum interference and the negative parts of the Wigner quasi-distribution, using the Wigner signed-particle formulation. A simple physical problem consisting

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Shen, Che-Chou, and Chun-Lin Huang. "Improvement in Multi-Angle Plane Wave Image Quality Using Minimum Variance Beamforming with Adaptive Signal Coherence." Sensors 24, no. 1 (2024): 262. http://dx.doi.org/10.3390/s24010262.

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For ultrasound multi-angle plane wave (PW) imaging, the coherent PW compounding (CPWC) method provides limited image quality because of its conventional delay-and-sum beamforming. The delay-multiply-and-sum (DMAS) method is a coherence-based algorithm that improves image quality by introducing signal coherence among either receiving channels or PW transmit angles into the image output. The degree of signal coherence in DMAS is conventionally a global value for the entire image and thus the image resolution and contrast in the target region improves at the cost of speckle quality in the backgro

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Son, Taeyoon, Minhaj Alam, Tae-Hoon Kim, Changgeng Liu, Devrim Toslak, and Xincheng Yao. "Near infrared oximetry-guided artery–vein classification in optical coherence tomography angiography." Experimental Biology and Medicine 244, no. 10 (2019): 813–18. http://dx.doi.org/10.1177/1535370219850791.

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Differential artery–vein analysis is valuable for early detection of diabetic retinopathy and other eye diseases. As a new optical coherence tomography imaging modality, optical coherence tomography angiography provides capillary level resolution for accurate examination of retinal vasculatures. However, differential artery–vein analysis in optical coherence tomography angiography particularly for macular region in which blood vessels are small is challenging. In coordination with an automatic vessel tracking algorithm, we report here the feasibility of using near infrared optical coherence to

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Olen, Stephanie, and Bodo Bookhagen. "Mapping Damage-Affected Areas after Natural Hazard Events Using Sentinel-1 Coherence Time Series." Remote Sensing 10, no. 8 (2018): 1272. http://dx.doi.org/10.3390/rs10081272.

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The emergence of the Sentinel-1A and 1B satellites now offers freely available and widely accessible Synthetic Aperture Radar (SAR) data. Near-global coverage and rapid repeat time (6–12 days) gives Sentinel-1 data the potential to be widely used for monitoring the Earth’s surface. Subtle land-cover and land surface changes can affect the phase and amplitude of the C-band SAR signal, and thus the coherence between two images collected before and after such changes. Analysis of SAR coherence therefore serves as a rapidly deployable and powerful tool to track both seasonal changes and rapid surf

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Barabinot, Yan, Sabrina Speich, and Xavier Carton. "Assessing the thermohaline coherence of mesoscale eddies as described from in situ data." Ocean Science 21, no. 1 (2025): 151–79. https://doi.org/10.5194/os-21-151-2025.

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Abstract. Mesoscale eddies are a ubiquitous feature of the global ocean. According to Lagrangian theory, these eddies often transport a distinct water mass within their cores, making them materially coherent. This study aims to determine if such a distinct water mass exists in eddy cores, thereby verifying their material coherence using in situ data, despite the lack of temporal continuity. We introduce the term “thermohaline coherence” to describe this approach. Identifying such a water mass would signal Lagrangian transport from the eddy formation region. We analyzed the water masses at the

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Shen, Peng, Changcheng Wang, and Jun Hu. "A Polarization Stacking Method for Optimizing Time-Series Interferometric Phases of Distributed Scatterers." Remote Sensing 14, no. 17 (2022): 4168. http://dx.doi.org/10.3390/rs14174168.

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For time-series interferometric phases optimization of distributed scatterers (DSs), the SqueeSAR technology used the phase linking (PL) to extract the equivalent single-master (ESM) interferometric phases from the multilooking time-series coherence matrix. The Cramer–Rao lower bound (CRLB) for the PL describes the highest achievable estimation accuracy of the ESM phases, which depends on the number of looks and the time-series coherence magnitude matrix. With the abundance of time-series polarimetric SAR data, many scholars have studied the coherence magnitude-based polarimetric optimization

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Asleh, Wadee Othman, and Naser Yousef Magableh. "A Causal Model of the Relationships between Family Climate, Academic Emotions, and School Sense of Coherence among Secondary School Students in Lower Galili Region." Jordanian Educational Journal 10, no. 2 (2025): 166–94. https://doi.org/10.46515/jaes.v10i2.1485.

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The study aimed to explore the relationship between family climate, academic emotions, and school sense of coherence among secondary school students in Lower Galili Region. The researchers used the descriptive correlational methodology. The study sample consisted of (571) male and female secondary school students in Arab schools in the educational region of lower Galili, chosen by the simple random sampling. The measures of family climate, academic emotions and school sense of coherence were used. The results showed that the family climate had an indirect, positive, statistically significant e

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Asleh, Wadee Othman, and Naser Yousef Magableh. "A Causal Model of the Relationships between Family Climate, Academic Emotions, and School Sense of Coherence among Secondary School Students in Lower Galili Region." Jordanian Educational Journal 10, no. 2 (2025): 166–94. https://doi.org/10.46515/jaes.v10i2.1502.

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The study aimed to explore the relationship between family climate, academic emotions, and school sense of coherence among secondary school students in Lower Galili Region. The researchers used the descriptive correlational methodology. The study sample consisted of (571) male and female secondary school students in Arab schools in the educational region of lower Galili, chosen by the simple random sampling. The measures of family climate, academic emotions and school sense of coherence were used. The results showed that the family climate had an indirect, positive, statistically significant e

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Chini, Marco, Ramona Pelich, Renaud Hostache, Patrick Matgen, and Carlos Lopez-Martinez. "Towards a 20 m Global Building Map from Sentinel-1 SAR Data." Remote Sensing 10, no. 11 (2018): 1833. http://dx.doi.org/10.3390/rs10111833.

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This study introduces a technique for automatically mapping built-up areas using synthetic aperture radar (SAR) backscattering intensity and interferometric multi-temporal coherence generated from Sentinel-1 data in the framework of the Copernicus program. The underlying hypothesis is that, in SAR images, built-up areas exhibit very high backscattering values that are coherent in time. Several particular characteristics of the Sentinel-1 satellite mission are put to good use, such as its high revisit time, the availability of dual-polarized data, and its small orbital tube. The newly developed

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Jankovic, Aleksandar, Miroslav Vukosavljevic, Sinisa Avramovic, and Biljana Draganic. "Optical coherence tomography in late solar retinopathy." Vojnosanitetski pregled 68, no. 8 (2011): 709–11. http://dx.doi.org/10.2298/vsp1108709j.

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Introduction. Solar retinopathy refers to retinal injury induced by direct or indirect solar viewing. Case report. We presented a patient who had observed partial solar eclipse 51 year before. He had bilaterally decreased vision and scar of the macular region at the time of presentation. The basic diagnostic tool applied in the presented patient, optical coherence tomography, showed hyporeflexivity of the outer retina in the segment of retinal pigment epithelialphotoreceptors complex with atrophy and thinning of the foveolar region. Conclusion. Optical coherence tomography is a powerful, non-i

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Charchula, K. "Coherence effects in the current fragmentation region at HERA." Journal of Physics G: Nuclear and Particle Physics 19, no. 10 (1993): 1587–93. http://dx.doi.org/10.1088/0954-3899/19/10/015.

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Zwolska, Jowita, Ireneusz Balicki, and Agnieszka Balicka. "Morphological and Morphometric Analysis of Canine Choroidal Layers Using Spectral Domain Optical Coherence Tomography." International Journal of Environmental Research and Public Health 20, no. 4 (2023): 3121. http://dx.doi.org/10.3390/ijerph20043121.

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The choroid, a multifunctional tissue, has been the focus of research interest for many scientists. Its morphology and morphometry facilitate an understanding of pathological processes within both the choroid and retina. This study aimed to determine the choroidal layer thicknesses in healthy, mixed-breed mesocephalic dogs, both male (M) and female (F), using spectral domain optical coherence tomography (SD-OCT) with radial, cross-sectional, and linear scans. The dogs were divided into two groups based on age: middle-aged (MA) and senior (SN). Thicknesses of choroidal layers, namely RPE–Bruch’

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Costa, Mabel Calim, and Marcos Eduardo Cordeiro Bernardes. "Remote wind stress influence on mean sea level in a subtropical coastal region." Brazilian Journal of Oceanography 60, no. 3 (2012): 331–42. http://dx.doi.org/10.1590/s1679-87592012000300006.

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The purpose of this study was to assess the relative influence of remote wind stress on mean sea level (MSL) variations in the coastal region of Cananeia (Sao Paulo State, Southern Brazil) during the period from 1/1/1955 to 12/31/1993. An optimized low-pass Thompson filter for the study area, and spectral analysis (cross spectrum, coherence and phase lag) of the relationship between the MSL and both parallel (T//) and perpendicular (T|) wind stress components were applied. These were extracted from four grid points of the NCEP/NCAR global model. The predominance of annual oscillations as those

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Badr, Hamada S., Amin K. Dezfuli, Benjamin F. Zaitchik, and Christa D. Peters-Lidard. "Regionalizing Africa: Patterns of Precipitation Variability in Observations and Global Climate Models." Journal of Climate 29, no. 24 (2016): 9027–43. http://dx.doi.org/10.1175/jcli-d-16-0182.1.

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Abstract Many studies have documented dramatic climatic and environmental changes that have affected Africa over different time scales. These studies often raise questions regarding the spatial extent and regional connectivity of changes inferred from observations and proxies and/or derived from climate models. Objective regionalization offers a tool for addressing these questions. To demonstrate this potential, applications of hierarchical climate regionalizations of Africa using observations and GCM historical simulations and future projections are presented. First, Africa is regionalized ba

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DOJAT, MICHEL, LOŸS PIETTRE, CHANTAL DELON-MARTIN, MATHILDE PACHOT-CLOUARD, CHRISTOPH SEGEBARTH, and KENNETH KNOBLAUCH. "Global integration of local color differences in transparency perception: An fMRI study." Visual Neuroscience 23, no. 3-4 (2006): 357–64. http://dx.doi.org/10.1017/s0952523806233200.

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In normal viewing, the visual system effortlessly assigns approximately constant attributes of color and shape to perceived objects. A fundamental component of this process is the compensation for illuminant variations and intervening media to recover reflectance properties of natural surfaces. We exploited the phenomenon of transparency perception to explore the cortical regions implicated in such processes, using fMRI. By manipulating the coherence of local color differences around a region in an image, we interfered with their global perceptual integration and thereby modified whether the r

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Lindeman, Sander, Sungho Hong, Lieke Kros, et al. "Cerebellar Purkinje cells can differentially modulate coherence between sensory and motor cortex depending on region and behavior." Proceedings of the National Academy of Sciences 118, no. 2 (2020): e2015292118. http://dx.doi.org/10.1073/pnas.2015292118.

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Activity of sensory and motor cortices is essential for sensorimotor integration. In particular, coherence between these areas may indicate binding of critical functions like perception, motor planning, action, or sleep. Evidence is accumulating that cerebellar output modulates cortical activity and coherence, but how, when, and where it does so is unclear. We studied activity in and coherence between S1 and M1 cortices during whisker stimulation in the absence and presence of optogenetic Purkinje cell stimulation in crus 1 and 2 of awake mice, eliciting strong simple spike rate modulation. Wi

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Levchenko, O. V., N. A. Gavrilova, A. Yu Grigoryev, et al. "Optical coherence tomography and optical coherence tomography-angiography in the diagnosis of chiasmo-sellar region compression." Vestnik oftal'mologii 136, no. 5 (2020): 14. http://dx.doi.org/10.17116/oftalma202013605114.

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Bhartia, Swadha, and Anil Sehrawat. "Students' Assessment of Global, Local Coherence and Their Psychological Impact to Examine the Quantitative and Qualitative Disparities in ESL Students' Persuasive Texts." Journal for Re Attach Therapy and Development Diversities 6, no. 6s (2023): 341–51. https://doi.org/10.5281/zenodo.14900924.

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The comprehension and effectiveness of any text heavily rely on coherence. A vital aspect that enhances coherence is the organization of the text. This research delves into the impact of students' field of study on their capacity to organize text in a coherent and comprehensible manner. Additionally, it aims to examine the quantitative and qualitative disparities in the utilization of the principal form of organization in spontaneously written persuasive texts. To explore the developmental patterns of language features that contribute to the organization and coherence of persuasive texts, this

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