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Spectral Clustering of ROIs for Object Discovery [chapter]

Paul Bodesheim
2011 Lecture Notes in Computer Science  
Object discovery is one of the most important applications of unsupervised learning.  ...  The object detector provides rectangular regions of interest (ROIs) as object hypotheses independent of the underlying object class.  ...  I want to thank Erik Rodner, advisor of my diploma thesis, for his great support and Michael Kemmler for helpful suggestions.  ... 
doi:10.1007/978-3-642-23123-0_47 fatcat:7hbbzfaknvdb7pvk4tzcoa3s4a

Page 177 of Astronomy and Astrophysics Vol. 145, Issue 1 [page]

1985 Astronomy and Astrophysics  
Pakull: Discovery of a very bright compact object N88A in the Small Magellanic Cloud 177 covered by Ha, Hf, [Om] and [Sm].  ...  except for the N67 nebula) and our poor spectral resolution.  ... 

An Attempt to Identify Reproducible High-Density EEG Markers of PTSD during Sleep

Chao Wang, Sridhar Ramakrishnan, Srinivas Laxminarayan, Andrey Dovzhenok, J David Cashmere, Anne Germain, Jaques Reifman
2019 Sleep  
To assess reproducibility, we used the first 47 consecutive participants (18 with PTSD) for initial discovery and the remaining 31 participants (13 with PTSD) for replication.  ...  Study Objectives We examined electroencephalogram (EEG) spectral power to study abnormalities in regional brain activity in post-traumatic stress disorder (PTSD) during sleep.  ...  Department of Defense, or The Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc. This paper has been approved for public release with unlimited distribution.  ... 
doi:10.1093/sleep/zsz207 pmid:31553047 fatcat:uyzraovmujdfdfi4l23oisaeka

MALDI-MSI Towards Multimodal Imaging: Challenges and Perspectives

Michael Tuck, Florent Grélard, Landry Blanc, Nicolas Desbenoit
2022 Frontiers in Chemistry  
Multimodal imaging is a powerful strategy for combining information from multiple images. It involves several fields in the acquisition, processing and interpretation of images.  ...  While MALDI-MS images convey a substantial amount of chemical information, they are not readily informative about the morphological nature of the tissue.  ...  All authors listed have made a direct, intellectual and equal contribution to the work and approved it for publication.  ... 
doi:10.3389/fchem.2022.904688 fatcat:keu6nsp6lzhtdl6qjqc22ohz5u

Spectral analysis assisted photoacoustic imaging for lipid composition differentiation

Yingchun Cao, Ayeeshik Kole, Lu Lan, Pu Wang, Jie Hui, Michael Sturek, Ji-Xin Cheng
2017 Photoacoustics  
The approach is based on the classification of spectral curves obtained from the sliding windows along time-of-flight photoacoustic signals via a numerical k-means clustering method.  ...  Here, we demonstrate a spectral analysis assisted photoacoustic imaging approach to differentiate and map lipid compositions within an artery wall.  ...  density within the bandwidth for ROI 1 and ROI 2 ; (f) PCA result for cholesterol and olive oil within the ROIs.  ... 
doi:10.1016/j.pacs.2017.05.002 pmid:28649497 pmcid:PMC5472148 fatcat:7iws6l2jsncsvowu4cnnpeva4u

Efficient Method for POI/ROI Discovery Using Flickr Geotagged Photos

Chiao-Ling Kuo, Ta-Chien Chan, I-Chun Fan, Alexander Zipf
2018 ISPRS International Journal of Geo-Information  
Methods developed for the POI/ROI discovery of bottom-up approaches have been widely discussed.  ...  The main processing steps, such as point clustering for POI/ROI discovery, usually adopt well-known algorithms or approaches, such as spatial clustering, that focus on a specific property process of either  ...  The pattern or relation of objects within a time unit cannot be indicated between clusters, such as seasonal clusters.  ... 
doi:10.3390/ijgi7030121 fatcat:fl3wzqoqgfagdgsfxiyz2dxsp4

A new flaring high-energyγ-ray source

E. Bernieri, R. Campana, E. Massaro, A. Paggi, A. Tramacere
2013 Astronomy and Astrophysics  
A search for a possible counterpart provides indication that it can be associated with the radio source NVSS J141828+354250 whose optical SDSS colours are typical of a blazar.  ...  We report the detection of a new gamma-ray source in the Fermi-LAT sky using a source detection tool based on the Minimal Spanning Tree algorithm.  ...  Department of Energy, the National Aeronautics and Space Administration, the Japanese Monbukagakusho, the Max Planck Society, and the Higher Education Funding Council for England.  ... 
doi:10.1051/0004-6361/201220834 fatcat:sccui7sqe5avllqzmh7qotdtbe

Measuring network's entropy in ADHD: A new approach to investigate neuropsychiatric disorders

João Ricardo Sato, Daniel Yasumasa Takahashi, Marcelo Queiroz Hoexter, Katlin Brauer Massirer, André Fujita
2013 NeuroImage  
In addition, to enhance interpretability, we also combined graph spectral clustering to investigate the topological organization of sub-network's modules.  ...  In this study, we applied the concept of graph spectral entropy (GSE) to quantify the complexity in the organization of brain networks.  ...  Graph Spectral clustering The problem of clustering ROIs (modules) consists of finding a partition of the network (graph) where different sub-networks (clusters) are lowly connected whereas the ROIs within  ... 
doi:10.1016/j.neuroimage.2013.03.035 pmid:23571416 fatcat:p7qj2q24rzgqhougp3llwuoeeu

Multispectral Fingerprinting Resolves Dynamics of Nanomaterial Trafficking in Primary Endothelial Cells [article]

Mitchell A Gravely, Daniel Roxbury
2020 bioRxiv   pre-print
An analysis pipeline was developed to colocalize and deconvolute the fluorescence and Raman spectra of subcellular regions of interest (ROIs), allowing for single-chirality component spectra to be obtained  ...  Finally, a spectral clustering analysis was applied to delineate the dynamic sequence of processes into four distinct populations, allowing stages of the intracellular trafficking process to be identified  ...  Spectral k-means Clustering Spectral k-means clustering of intracellular ROIs was performed in Matlab using a combination of custom and toolbox functions.  ... 
doi:10.1101/2020.12.14.422763 fatcat:cnn6b7pmcjdwfnlclseqkfggie

Towards an operative use of remote sensing for exploring the past using satellite data: The case study of Hierapolis (Turkey)

Rosa Lasaponara, Giovanni Leucci, Nicola Masini, Raffaele Persico, Giuseppe Scardozzi
2016 Remote Sensing of Environment  
This choice is given by the specificity of archaeological issue, in particular: (i) the subtle features/targets to be identified are partially or totally unknown and characterized by a very small spectral  ...  This paper is focused on the presentation and discussion of an object oriented approach, applied to the Hierapolis (Turkey) site, to automatically detect the subtle features linked to buried archaeological  ...  Finally, the form parameter controls the form features of an object by simultaneously balancing the criteria for smoothness of the object border and the criteria for object compactness.  ... 
doi:10.1016/j.rse.2015.12.016 fatcat:fcg3n45o3jhbfkp5u63vyv7uqm

Very high energy γ-ray emission from RBS 0970

Anthony M. Brown
2014 Monthly Notices of the Royal Astronomical Society Letters  
The discovery of RBS 0970 as a VHE emitter, combined with the spectral variability, suggest RBS 0970 to be a good candidate for follow-up observations with ground-based gamma-ray observatories.  ...  In this letter I report the Fermi Large Area Telescope (LAT) detection of Very High Energy (VHE; E>100 GeV) gamma-ray emission from the BL Lac object RBS 0970. 5.3 years of LAT observations revealed the  ...  This Letter reports the discovery of VHE emission from RBS 0970. Utilizing 5.3 years of Fermi-LAT data, three ULTRA-CLEAN events were discovered to be clustered within 0. • 1 of RBS 0970.  ... 
doi:10.1093/mnrasl/slu056 fatcat:jrghtogzmbe75l6hbgfkqqgvmu

Group-Wise Consistent Parcellation of Gyri via Adaptive Multi-view Spectral Clustering of Fiber Shapes [chapter]

Hanbo Chen, Xiao Cai, Dajiang Zhu, Feiping Nie, Tianming Liu, Heng Huang
2012 Lecture Notes in Computer Science  
Then, we designed and applied a novel multi-view spectral clustering algorithm to group the vertices into groupwise consistent gyral segments across different brains.  ...  In-vivo parcellation of the cerebral cortex via non-invasive neuroimaging data has been in active research for years.  ...  In this paper, we propose a novel approach for fine-granularity cortical gyrus parcellation via group-wise multi-view spectral clustering of fiber shape patterns.  ... 
doi:10.1007/978-3-642-33418-4_34 fatcat:a56sxeywgnebbhj3hggmmm42am

Two new high-energy γ-ray blazar candidates

R. Campana, A. Maselli, E. Bernieri, E. Massaro
2016 Monthly notices of the Royal Astronomical Society  
We searched for archival multi-wavelength data of possible counterparts and found interesting candidates. Both objects are radio sources and their WISE infrared colours are typical of blazars.  ...  We discuss the spectral energy distributions of both sources and possible interpretations.  ...  We furthermore acknowledge use of archival Fermi-LAT data, of the Final Release 6dFGS archive, and of the SDSS and DSS archives. We are particularly grateful to Mike A. Read of the 6dF team.  ... 
doi:10.1093/mnras/stw3007 fatcat:gy3dujltwbekzn3tz7vtnf2qnq

Quantitative analysis of individual hepatocyte growth factor receptor clusters in influenza A virus infected human epithelial cells using localization microscopy

Qiaoyun Wang, Rüdiger Dierkes, Rainer Kaufmann, Christoph Cremer
2014 Biochimica et Biophysica Acta - Biomembranes  
This article is part of a Special Issue entitled: Viral Membrane Proteins -Channels for Cellular Networking.  ...  From the density of HGFR molecule signals in the clusters and the diameter of the clusters, the number of HGFR molecule signals per cluster was estimated to be in the range between 4 and 11 (means 5-6)  ...  Christina Ehrhardt, Institute of Molecular Virology, ZMBE University of Münster (Germany) for valuable advice and critical reading of the ms, as well as for the additional help obtained from colleagues  ... 
doi:10.1016/j.bbamem.2013.12.014 pmid:24374315 fatcat:qhtvaazgprbtrl7m6huisjwyna

Evidence of 100 TeV γ-ray emission from HESS J1702-420: A new PeVatron candidate [article]

L. Giunti, B. Khelifi, K. Kosack, R. Terrier for the H.E.S.S. Collaboration
2021 arXiv   pre-print
This new object has a power-law spectral slope < 2 and a gamma-ray spectrum that, extending with no sign of curvature up to 100 TeV, makes it an excellent candidate site for the presence of PeV-energy  ...  This discovery brings new information to the ongoing debate on the nature of the unidentified source HESSJ1702-420, one of the most compelling PeVatron candidates in the gamma-ray sky, and on the origin  ...  Acknowledgements: The support of the Namibian authorities and of the University of Namibia in facilitating the construction and operation of H.E.S.S. is gratefully acknowledged, as is the support by the  ... 
arXiv:2108.02989v1 fatcat:rua4p4vk3feb3oq3voszwqygw4
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