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Brain communications 2021年第1期3卷 fcaa190页

作者： Colm J McGinnity Daniela A Riaño Barros Rainer Hinz James F Myers Siti N Yaakub Charlotte Thyssen Rolf A Heckemann Jane de Tisi John S Duncan Josemir W Sander Anne Lingford-Hughes Matthias J Koepp Alexander Hammers Centre for Neuroscience Department of Medicine Imperial College London London W12 0NN UK. MRC Clinical Sciences Centre Hammersmith Hospital London W12 0NN UK. King's College London & Guy's and St Thomas' PET Centre School of Biomedical Engineering & Imaging Sciences King's College London London SE1 7EH UK. Wolfson Molecular Imaging Centre University of Manchester Manchester M20 3LJ UK. Medical Image and Signal Processing (MEDISIP) Department of Electronics and Information Systems Faculty of Engineering and Architecture Ghent University 9000 Ghent Belgium. Department of Medical Radiation Sciences Institute of Clinical Sciences Sahlgrenska Academy University of Gothenburg 413 45 Gothenburg Sweden. NIHR University College London Hospitals Biomedical Research Centre UCL Queen Square Institute of Neurology London WC1N 3BG UK and Chalfont Centre for Epilepsy Chalfont St Peter SL9 0RJ UK. Stichting Epilepsie Instellingen Nederland (SEIN) Heemstede 2103SW The Netherlands. Neuropsychopharmacology Unit Centre for Psychiatry Department of Brain Sciences Faculty of Medicine Imperial College London London W12 0NN UK. Neurodis Foundation CERMEP Imagerie du Vivant 69003 Lyon France.

GABA receptors containing the α5 subunit mediate tonic inhibition and are widely expressed in the limbic system. In animals, activation of α5-containing receptors impairs hippocampus-dependent memory. Temporal lobe epilepsy is associated with memory impairments related to neuron loss and other changes. The less selective PET ligand [C]flumazenil has revealed reductions in GABA receptors. The hypothesis that α5 subunit receptor alterations are present in temporal lobe epilepsy and could contribute to impaired memory is untested. We compared α5 subunit availability between individuals with temporal lobe epilepsy and normal structural MRI ('MRI-negative') and healthy controls, and interrogated the relationship between α5 subunit availability and episodic memory performance, in a cross-sectional study. Twenty-three healthy male controls (median ± interquartile age 49 ± 13 years) and 11 individuals with MRI-negative temporal lobe epilepsy (seven males; 40 ± 8) had a 90-min PET scan after bolus injection of [C]Ro15-4513, with arterial blood sampling and metabolite correction. All those with epilepsy and six controls completed the Adult Memory and Information processing Battery on the scanning day. 'Bandpass' exponential spectral analyses were used to calculate volumes of distribution separately for the fast component [ ; dominated by signal from α1 (α2, α3)-containing receptors] and the slow component ( ; dominated by signal from α5-containing receptors). We made voxel-by-voxel comparisons between: the epilepsy and control groups; each individual case versus the controls. We obtained parametric maps of and measures from a single bolus injection of [C]Ro15-4513. The epilepsy group had higher in anterior medial and lateral aspects of the temporal lobes, the anterior cingulate gyri, the presumed area tempestas (piriform cortex) and the insulae, in addition to increases of ∼24% and ∼26% in the ipsilateral and contralateral hippocampal areas ( < 0.004). This was associat

关键词： GABAA PET [11C]Ro15-4513 memory α5

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ROW-COLUMN TRANSFORMS: LOW-COMPLEXITY APPROXIMATION OF OPTIMAL NON-SEPARABLE TRANSFORMS

ROW-COLUMN TRANSFORMS: LOW-COMPLEXITY APPROXIMATION OF OPTIM...

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IEEE International Conference on image processing

作者： Hilmi E. Egilmez Onur G. Guleryuz Jana Ehmann Sehoon Yea Signal & Image Processing Institute University of Southern California LG Electronics Mobile Research Lab

ISBN: (纸本)9781467399623

This paper introduces row-column transforms (RCTs) which are 2-D non-separable transforms defined with the aid of a set of 1-D linear transforms and a basis ordering permutation. We propose a novel method for the design of row-column transforms that approximate desired complex transforms (such as KLTs, SOTs, etc.) so that most of the performance of the approximated transforms is retained at significantly reduced complexity. Given a non-separable block transform of interest, our method designs an RCT by (i) optimizing a set of 1-D transforms applied to rows and columns of the signal block and (ii) finding the best transform coefficient ordering permutation. Our experimental results show that optimized RCTs closely approach the compression performance of the desired non-separable transforms while retaining the computational complexity of separable transforms.

关键词： Transform coding Row-column transforms Video compression Separable Optimization Hungarian method transform coding Video compression Transform Separable separable transform block transform

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Author Correction: Brain clocks capture diversity and disparities in aging and dementia across geographically diverse populations

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Nature medicine 2024年第12期30卷 3779页

作者： Sebastian Moguilner Sandra Baez Hernan Hernandez Joaquín Migeot Agustina Legaz Raul Gonzalez-Gomez Francesca R Farina Pavel Prado Jhosmary Cuadros Enzo Tagliazucchi Florencia Altschuler Marcelo Adrián Maito María E Godoy Josephine Cruzat Pedro A Valdes-Sosa Francisco Lopera John Fredy Ochoa-Gómez Alfredis Gonzalez Hernandez Jasmin Bonilla-Santos Rodrigo A Gonzalez-Montealegre Renato Anghinah Luís E d'Almeida Manfrinati Sol Fittipaldi Vicente Medel Daniela Olivares Görsev G Yener Javier Escudero Claudio Babiloni Robert Whelan Bahar Güntekin Harun Yırıkoğulları Hernando Santamaria-Garcia Alberto Fernández Lucas David Huepe Gaetano Di Caterina Marcio Soto-Añari Agustina Birba Agustin Sainz-Ballesteros Carlos Coronel-Oliveros Amanuel Yigezu Eduar Herrera Daniel Abasolo Kerry Kilborn Nicolás Rubido Ruaridh A Clark Ruben Herzog Deniz Yerlikaya Kun Hu Mario A Parra Pablo Reyes Adolfo M García Diana L Matallana José Alberto Avila-Funes Andrea Slachevsky María I Behrens Nilton Custodio Juan F Cardona Pablo Barttfeld Ignacio L Brusco Martín A Bruno Ana L Sosa Ortiz Stefanie D Pina-Escudero Leonel T Takada Elisa Resende Katherine L Possin Maira Okada de Oliveira Alejandro Lopez-Valdes Brian Lawlor Ian H Robertson Kenneth S Kosik Claudia Duran-Aniotz Victor Valcour Jennifer S Yokoyama Bruce Miller Agustin Ibanez Latin American Brain Health Institute Universidad Adolfo Ibañez Santiago de Chile Chile. Cognitive Neuroscience Center Universidad de San Andrés Buenos Aires Argentina. Department of Neurology Massachusetts General Hospital and Harvard Medical School Boston MA USA. Universidad de los Andes Bogota Colombia. Global Brain Health Institute (GBHI) University of California San Francisco CA USA. Global Brain Health Institute (GBHI) Trinity College Dublin Dublin Ireland. The University of California Santa Barbara (UCSB) Santa Barbara CA USA. Escuela de Fonoaudiología Universidad San Sebastián Santiago de Chile Chile. Grupo de Bioingeniería Decanato de Investigación Universidad Nacional Experimental del Táchira San Cristóbal Venezuela. Advanced Center for Electrical and Electronic Engineering Universidad Técnica Federico Santa María Valparaíso Chile. University of Buenos Aires Buenos Aires Argentina. The Clinical Hospital of Chengdu Brain Sciences Institute University of Electronic Sciences and Technology of China Chengdu China. Technology of China Chengdu China. Cuban Neuroscience Center La Habana Cuba. Grupo de Neurociencias de Antioquia (GNA) University of Antioquia Medellín Colombia. Department of Psychology Master Program of Clinical Neuropsychology Universidad Surcolombiana Neiva Neiva Colombia. Department of Psychology Universidad Cooperativa de Colombia Arauca Colombia. Neurocognition and Psychophysiology Laboratory Universidad Surcolombiana Neiva Colombia. Reference Center of Behavioural Disturbances and Dementia School of Medicine University of Sao Paulo Sao Paulo Brazil. Traumatic Brain Injury Cognitive Rehabilitation Out-Patient Center University of Sao Paulo Sao Paulo Brazil. Center for Social and Cognitive Neuroscience School of Psychology Universidad Adolfo Ibáñez Santiago Chile. Neuropsychology and Clinical Neuroscience Laboratory (LANNEC) Physiopathology Program-Institute of Biomedical Sciences (ICBM) Neuroscience and East Neuroscience Dep

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High Spatio-Temporal Resolution Land Surface Temperature Mission - a Copernicus candidate mission in support of agricultural monitoring

High Spatio-Temporal Resolution Land Surface Temperature Mis...

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IEEE International Geoscience and Remote Sensing Symposium

作者： Benjamin Koetz Wim Bastiaanssen Michael Berger Pierre Defourney Umberto Del Bello Matthias Drusch Mark Drinkwater Ricardo Duca Valerie Fernandez Darren Ghent Radoslaw Guzinski Jippe Hoogeveen Simon Hook Jean-Pierre Lagouarde Guido Lemoine Ilias Manolis Philippe Martimort Jeff Masek Michel Massart Claudia Notarnicola Jose Sobrino Thomas Udelhoven European Space Agency ESRIN Frascati Italy UNESCO IHE Delft Institute for Water Education Delft Netherlands European Commission DG-Grow Brussels Belgium Université Catholique de Louvain Earth and Life Institute instead of Environmental Sciences Louvain-la-Neuve Belgium European Space Agency ESTEC Noordwik Netherlands University of Leicester Leicester United Kingdom UN Food and Agriculture Organization Land and Water Division Rome Italy Jet Propulsion Laboratory Pasadena United States of America INRA UMR 1391 ISPA Villenave d'Ornon France European Commission DG Joint Research Center Ispra Italy NASA Goddard Space Flight Center Greenblet United States of America EURAC Institute for Earth Observation Bolzano Italy University of Valencia Image Processing Laboratory Valencia Spain Geography & Geosciences University of Trier Trier Germany

Evolution in the Copernicus Space Component (CSC) is foreseen in the mid-2020s to meet priority Copernicus user needs not addressed by the existing infrastructure, and/or to reinforce services by monitoring capability in the thematic domains of CO_2, polar, and agriculture/forestry. This evolution will be synergetic with the enhanced continuity of services for the next generation of CSC. The "High Spatio-Temporal Resolution Land Surface Temperature Monitoring (LSTM) Mission", identified as one of the CSC Expansion High Priority Candidate Missions (HPCM), currently undergoes an ESA preparatory phase (phase A/B1) study to establish mission feasibility. The LSTM mission shall provide enhanced measurements of land surface temperature with a focus responding to user requirements related to agricultural monitoring.

关键词： Water resources Agriculture Land surface temperature Monitoring Europe Land surface Earth

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Perovskite Solar Cells: Unique Seamlessly Bonded CNT@Graphene Hybrid Nanostructure Introduced in an Interlayer for Efficient and Stable Perovskite Solar Cells (Adv. Funct. Mater. 32/2018)

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Advanced Functional Materials 2018年第32期28卷

作者： Xuanhua Li Tengteng Tong Qinjiang Wu Shaohui Guo Qiang Song Jian Han Zhixiang Huang State Key Laboratory of Solidification Processing Research and Development Institute of Northwestern Polytechnical University In Shenzhen Center for Nano Energy Materials School of Materials Science and Engineering Northwestern Polytechnical University and Shaanxi Joint Lab of Graphene (NPU) Xi'an 710072 China Northwestern Polytechnical University‐Queen Mary University of London (NPU‐QMUL) Joint Research Institute of Advanced Materials and Structures (JRI‐AMAS) Xi'an 710072 China Key Laboratory of Intelligent Computing and Signal Processing Ministry of Education Anhui University No. 3 Feixi Road Hefei Anhui Province 230039 P. R. China

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The properties of the cornea based on hyperspectral imaging: Optical biomedical engineering perspective 23

The properties of the cornea based on hyperspectral imaging:...

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23rd International Conference on Systems, signals and image processing, IWSSIP 2016

作者： Noor, S.S.M. Michael, K. Marshall, S. Ren, J. Tschannerl, J. Kao, F.J. Centre of Excellent Signal and Image Processing E.E.E University of Strathclyde Glasgow United Kingdom Glasgow Centre for Ophthalmic Research Gartnavel General Hospital Glasgow United Kingdom Institute of Biophotonics National Yang-Ming University Taipei Taiwan

ISBN: (纸本)9781467395557

Biomedical engineering is a unique area that allows fusion between two distinct fields of engineering and medicine. The integration of efforts from both fields promises progress through acquisition of information from tissues, cells, and organs through non-invasive methods of assessment. Here we investigate the ability of a hyperspectral device in extracting data from tissues through the wavelength spectrum, in foreseeing its potential in clinical diagnostics by simplifying methods of examination by clinicians in detecting corneal injuries. Hyperspectral imaging using 400 to 1000nm visible wavelength was used to scan five porcine eyes (injured and non-injured). images were saved in three dimensional images of rows, columns, and depth slices at 1200 to 1300×804×604 and were processed. All laboratory works were performed in accordance with the general risk assessment of University of Strathclyde. In our results, analysis of the images reveals significant cue between 500 to 800nm bands in differentiating between injured and non-injured parts of the eye. © 2016 IEEE.

关键词： Biomedical engineering

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Phase Recovery for 3D SAR Range Focusing

Phase Recovery for 3D SAR Range Focusing

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Radar Conference

作者： Mehrdad Yaghoobi Shaun I. Kelly Mike E. Davies the Institute for Digital Communication and with the Joint Research Institute for Signal and Image Processing Edinburgh University Kings Buildings Mayfield Road Edinburgh EH9 3JL UK Blackmagic Design Australia

ISBN: (纸本)9781509008643

The problem of calibrating Synthetic Aperture Radar (SAR) data for 3D image formation will be investigated here. A source of errors in modern radar systems is inaccurate range estimations, during the data collection. This is caused by two ambiguities in the platform location and the scene topography map. Such range estimation errors induce some asynchronization in the dechirping process, i.e. a shift in the range direction. When such an error is small, the final image will be blurred and possibly compensated using conventional autofocus techniques. In multipass SAR image formation, this error between the passes is large and we need a different machinery to correct it.

关键词： caused ambiguities platform

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Acoustic emission and angular movement variations from early adulthood healthy knees to late adulthood osteoarthritic knees

Acoustic emission and angular movement variations from early...

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Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)

作者： Lik-Kwan Shark Hongzhi Chen Wei Quan John Goodacre the Applied Digital Signal and Image Processing Research Centre (ADSIP) University of Central Lancashire Preston UK the Applied Digital Signal and Image Processing Research Centre (ADSIP) University of Central Lancashire China Iron and Steel Research Institute Group Beijing China North West Coast Innovation Agency Lancaster Health Hub Lancaster University Lancaster UK

From sit-stand-sit movements performed by healthy and osteoarthritic knees in three different age bands, this paper presents the investigation of the relationship between joint angular movement measured using electro-goniometers and acoustic emission measured using piezoelectric sensors. By partitioning joint movement in each sit-stand-sit cycle into sub-movement phases based on ascending and descending as well as acceleration and deceleration, the statistical analysis reveals aged and osteoarthritic knees exhibiting increased asymmetry and more variable angular movement compared with young and age-matched healthy knees, particularly in the descending-deceleration phase. With further evidence of a clear difference in the number of acoustic emission events detected from different knee groups, the study suggests the descending-deceleration phase likely to be most informative for quantitative assessment of knee aging and condition.

关键词： Angular velocity Aging Knee Acoustic emission Sensors Correlation coefficient Acoustic measurements

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Water Splitting: Optical and Electrical Enhancement of Hydrogen Evolution by MoS2@MoO3Core–Shell Nanowires with Designed Tunable Plasmon Resonance (Adv. Funct. Mater. 32/2018)

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Advanced Functional Materials 2018年第32期28卷

作者： Shaohui Guo Xuanhua Li Xingang Ren Lin Yang Jinmeng Zhu Bingqing Wei State Key Laboratory of Solidification Processing Center for Nano Energy Materials School of Materials Science and Engineering Northwestern Polytechnical University and Shaanxi Joint Lab of Graphene (NPU) Xi'an 710072 China Northwestern Polytechnical University‐Queen Mary University of London (NPU‐QMUL) Joint Research Institute of Advanced Materials and Structures (JRI‐AMAS) Xi'an 710072 China Key Laboratory of Intelligent Computing and Signal Processing Ministry of Education Anhui University No. 3 Feixi Road Hefei Anhui Province 230039 P. R. China Department of Mechanical Engineering University of Delaware Newark DE 19716 USA

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GinFlow: A Decentralised Adaptive Workflow Execution Manager

GinFlow: A Decentralised Adaptive Workflow Execution Manager

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International Symposium on Parallel and Distributed processing (IPDPS)

作者： Javier Rojas Balderrama Matthieu Simonin Cédric Tedeschi Signal and Image Processing Laboratory (LTSI) Inserm — Université de Rennes 1 France Inria Institute for Research in IT and Random Systems (IRISA) Université de Rennes 1 France

ISBN: (纸本)9781509021413

Workflow-based computing has become a dominant paradigm to design and execute scientific applications. After the initial breakthrough of now standard workflow management systems, several approaches have recently proposed to decentralise the coordination of the execution. In particular, shared space-based coordination has been shown to provide appropriate building blocks for such a decentralised execution. Uncertainty is also still a major concern in scientific workflows. The ability to adapt the workflow, change its shape and switch for alternate scenarios on-the-fly is still missing in workflow management systems. In this paper, based on a shared space approach, we firstly devise a programmatic way to specify such adaptive workflows. We use a reactive, rule-based programming model to modify the workflow description by changing its associated direct acyclic graph on-the-fly without needing to stop and restart the execution from the beginning. Secondly, we present the GinFlow middleware, a resilient decentralised workflow execution manager implementing these concepts. Through a set of deployments of adaptive workflows of different characteristics, we discuss the GinFlow performance and resilience and show the limited overhead of the adaptiveness mechanism, making it a promising decentralised adaptive workflow execution manager.

关键词： Programming Engines Adaptation models Chemicals Middleware Resilience Computer architecture

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