Search results for "Dimitris N. Metaxas"

Hits ?▲	Authors	Title	Venue	Year	Link	Author keywords
1	Shaoting Zhang, Yiqiang Zhan, Maneesh Dewan, Junzhou Huang, Dimitris N. Metaxas, Xiang Sean Zhou	Towards robust and effective shape modeling: Sparse shape composition.	Medical Image Analysis	2012	DBLP DOI BibTeX RDF
1	Shaoting Zhang, Junzhou Huang, Hongsheng Li, Dimitris N. Metaxas	Automatic Image Annotation and Retrieval Using Group Sparsity.	IEEE Transactions on Systems, Man, and Cybernetics, Part B	2012	DBLP DOI BibTeX RDF
1	Xinyi Cui, Qingshan Liu, Shaoting Zhang, Fei Yang, Dimitris N. Metaxas	Temporal Spectral Residual for fast salient motion detection.	Neurocomputing	2012	DBLP DOI BibTeX RDF
1	Zhen Qian, Qingshan Liu, Dimitris N. Metaxas, Leon Axel	Identifying Regional Cardiac Abnormalities From Myocardial Strains Using Nontracking-Based Strain Estimation and Spatio-Temporal Tensor Analysis.	IEEE Trans. Med. Imaging	2011	DBLP DOI BibTeX RDF
1	Junzhou Huang, Shaoting Zhang, Hongsheng Li, Dimitris N. Metaxas	Composite splitting algorithms for convex optimization.	Computer Vision and Image Understanding	2011	DBLP DOI BibTeX RDF
1	Peng Yang, Qingshan Liu, Dimitris N. Metaxas	Dynamic soft encoded patterns for facial event analysis.	Computer Vision and Image Understanding	2011	DBLP DOI BibTeX RDF
1	Yuchi Huang, Qingshan Liu, Fengjun Lv, Yihong Gong, Dimitris N. Metaxas	Unsupervised Image Categorization by Hypergraph Partition.	IEEE Trans. Pattern Anal. Mach. Intell.	2011	DBLP DOI BibTeX RDF
1	Fei Yang, Jue Wang, Eli Shechtman, Lubomir D. Bourdev, Dimitris N. Metaxas	Expression flow for 3D-aware face component transfer.	ACM Trans. Graph.	2011	DBLP DOI BibTeX RDF
1	Junzhou Huang, Shaoting Zhang, Dimitris N. Metaxas	Efficient MR image reconstruction for compressed MR imaging.	Medical Image Analysis	2011	DBLP DOI BibTeX RDF
1	Junzhou Huang, Tong Zhang, Dimitris N. Metaxas	Learning with Structured Sparsity.	Journal of Machine Learning Research	2011	DBLP BibTeX RDF
1	Chunming Li, Rui Huang, Zhaohua Ding, Chris Gatenby, Dimitris N. Metaxas, John C. Gore	A Level Set Method for Image Segmentation in the Presence of Intensity Inhomogeneities With Application to MRI.	IEEE Transactions on Image Processing	2011	DBLP DOI BibTeX RDF
1	Yuchi Huang, Qingshan Liu, Dimitris N. Metaxas	A Component-Based Framework for Generalized Face Alignment.	IEEE Transactions on Systems, Man, and Cybernetics, Part B	2011	DBLP DOI BibTeX RDF
1	Qingshan Liu, Yuchi Huang, Dimitris N. Metaxas	Hypergraph with sampling for image retrieval.	Pattern Recognition	2011	DBLP DOI BibTeX RDF
1	Shaoting Zhang, Junzhou Huang, Dimitris N. Metaxas	Robust mesh editing using Laplacian coordinates.	Graphical Models	2011	DBLP DOI BibTeX RDF
1	Dimitris N. Metaxas, Long Quan, Alberto Sanfeliu, Luc J. Van Gool (eds.)	IEEE International Conference on Computer Vision, ICCV 2011, Barcelona, Spain, November 6-13, 2011	ICCV	2011	DBLP BibTeX RDF
1	Rui Huang, Nong Sang, Vladimir Pavlovic, Dimitris N. Metaxas	A Belief Propagation algorithm for bias field estimation and image segmentation.	ICIP	2011	DBLP DOI BibTeX RDF
1	Albert Montillo, Jamie Shotton, John M. Winn, Juan Eugenio Iglesias, Dimitris N. Metaxas, Antonio Criminisi	Entangled Decision Forests and Their Application for Semantic Segmentation of CT Images.	IPMI	2011	DBLP DOI BibTeX RDF
1	Shizhi Chen, Yingli Tian, Qingshan Liu, Dimitris N. Metaxas	Segment and recognize expression phase by fusion of motion area and neutral divergence features.	FG	2011	DBLP DOI BibTeX RDF
1	Fei Yang, Junzhou Huang, Peng Yang, Dimitris N. Metaxas	Eye localization through multiscale sparse dictionaries.	FG	2011	DBLP DOI BibTeX RDF
1	Fei Yang, Junzhou Huang, Dimitris N. Metaxas	Sparse shape registration for occluded facial feature localization.	FG	2011	DBLP DOI BibTeX RDF
1	Xinyi Cui, Qingshan Liu, Mingchen Gao, Dimitris N. Metaxas	Abnormal detection using interaction energy potentials.	CVPR	2011	DBLP DOI BibTeX RDF
1	Shaoting Zhang, Yiqiang Zhan, Maneesh Dewan, Junzhou Huang, Dimitris N. Metaxas, Xiang Sean Zhou	Sparse shape composition: A new framework for shape prior modeling.	CVPR	2011	DBLP DOI BibTeX RDF
1	Shaoting Zhang, Junzhou Huang, Mustafa Gökhan Uzunbas, Tian Shen, Foteini Delis, Xiaolei Huang, Nora D. Volkow, Panayotis K. Thanos, Dimitris N. Metaxas	3D Segmentation of Rodent Brain Structures Using Hierarchical Shape Priors and Deformable Models.	MICCAI	2011	DBLP DOI BibTeX RDF
1	Shaoting Zhang, Yiqiang Zhan, Maneesh Dewan, Junzhou Huang, Dimitris N. Metaxas, Xiang Sean Zhou	Deformable Segmentation via Sparse Shape Representation.	MICCAI	2011	DBLP DOI BibTeX RDF
1	Scott Kulp, Mingchen Gao, Shaoting Zhang, Zhen Qian, Szilard Voros, Dimitris N. Metaxas, Leon Axel	Using High Resolution Cardiac CT Data to Model and Visualize Patient-Specific Interactions between Trabeculae and Blood Flow.	MICCAI	2011	DBLP DOI BibTeX RDF
1	Dimitris N. Metaxas, Leon Axel (eds.)	Functional Imaging and Modeling of the Heart - 6th International Conference, FIMH 2011, New York City, NY, USA, May 25-27, 2011. Proceedings	FIMH	2011	DBLP DOI BibTeX RDF
1	Shaoting Zhang, Mustafa Gökhan Uzunbas, Zhennan Yan, Mingchen Gao, Junzhou Huang, Dimitris N. Metaxas, Leon Axel	Construction of Left Ventricle 3D Shape Atlas from Cardiac MRI.	FIMH	2011	DBLP DOI BibTeX RDF
1	Mingchen Gao, Junzhou Huang, Shaoting Zhang, Zhen Qian, Szilard Voros, Dimitris N. Metaxas, Leon Axel	4D Cardiac Reconstruction Using High Resolution CT Images.	FIMH	2011	DBLP DOI BibTeX RDF
1	Peng Yang, Hui Li, Qingshan Liu, Lin Zhong, Dimitris N. Metaxas	Content quality based image retrieval with multiple instance boost ranking.	ACM Multimedia	2011	DBLP DOI BibTeX RDF
1	Yang Yu, Junzhou Huang, Shaoting Zhang, Christophe Restif, Xiaolei Huang, Dimitris N. Metaxas	Group sparsity based classification for cervigram segmentation.	ISBI	2011	DBLP DOI BibTeX RDF
1	Shaoting Zhang, Junzhou Huang, Mustafa Gökhan Uzunbas, Tian Shen, Foteini Delis, Xiaolei Huang, Nora D. Volkow, Panayotis K. Thanos, Dimitris N. Metaxas	3D segmentation of rodent brain structures using Active Volume Model with shape priors.	ISBI	2011	DBLP DOI BibTeX RDF
1	Christophe Restif, Carolina Ibanez-Ventoso, Monica Driscoll, Dimitris N. Metaxas	Tracking C. elegans swimming for high-throughput phenotyping.	ISBI	2011	DBLP DOI BibTeX RDF
1	Scott Kulp, Dimitris N. Metaxas, Zhen Qian, Szilard Voros, Leon Axel, Viorel Mihalef	Patient-specific modeling and visualization of blood flow through the heart.	ISBI	2011	DBLP DOI BibTeX RDF
1	Ting Chen, Xiaoxu Wang, Sohae Chung, Dimitris N. Metaxas, Leon Axel	Automated 3D Motion Tracking Using Gabor Filter Bank, Robust Point Matching, and Deformable Models.	IEEE Trans. Med. Imaging	2010	DBLP DOI BibTeX RDF
1	Zhenglong Li, Qingshan Liu, Hanqing Lu, Dimitris N. Metaxas	Lennard-Jones force field for geometric active contour.	Signal Processing	2010	DBLP DOI BibTeX RDF
1	Peng Yang, Lin Zhong, Dimitris N. Metaxas	Ranking Model for Facial Age Estimation.	ICPR	2010	DBLP DOI BibTeX RDF
1	Junzhou Huang, Shaoting Zhang, Dimitris N. Metaxas	Fast Optimization for Mixture Prior Models.	ECCV	2010	DBLP DOI BibTeX RDF
1	Nicholas Michael, Mark Dilsizian, Dimitris N. Metaxas, Judee K. Burgoon	Motion Profiles for Deception Detection Using Visual Cues.	ECCV	2010	DBLP DOI BibTeX RDF
1	Yuchi Huang, Qingshan Liu, Shaoting Zhang, Dimitris N. Metaxas	Image retrieval via probabilistic hypergraph ranking.	CVPR	2010	DBLP DOI BibTeX RDF
1	Peng Yang, Qingshan Liu, Dimitris N. Metaxas	Exploring facial expressions with compositional features.	CVPR	2010	DBLP DOI BibTeX RDF
1	Shaoting Zhang, Junzhou Huang, Yuchi Huang, Yang Yu, Hongsheng Li, Dimitris N. Metaxas	Automatic image annotation using group sparsity.	CVPR	2010	DBLP DOI BibTeX RDF
1	Junzhou Huang, Shaoting Zhang, Dimitris N. Metaxas	Efficient MR Image Reconstruction for Compressed MR Imaging.	MICCAI	2010	DBLP DOI BibTeX RDF
1	Qingshan Liu, Zhen Qian, Idean Marvasty, Sarah Rinehart, Szilard Voros, Dimitris N. Metaxas	Lesion-Specific Coronary Artery Calcium Quantification for Predicting Cardiac Event with Multiple Instance Support Vector Machines.	MICCAI	2010	DBLP DOI BibTeX RDF
1	Shaoting Zhang, Junzhou Huang, Dimitris N. Metaxas, Wei Wang, Xiaolei Huang	Discriminative sparse representations for cervigram image segmentation.	ISBI	2010	DBLP DOI BibTeX RDF
1	Judee K. Burgoon, Douglas P. Twitchell, Matthew L. Jensen, Thomas O. Meservy, Mark Adkins, John Kruse, Amit V. Deokar, Gabriel Tsechpenakis, Shan Lu, Dimitris N. Metaxas, Jay F. Nunamaker, Robert Younger	Detecting Concealment of Intent in Transportation Screening: A Proof of Concept.	IEEE Transactions on Intelligent Transportation Systems	2009	DBLP DOI BibTeX RDF
1	Qiang Ji, Jiebo Luo, Dimitris N. Metaxas, Antonio Torralba, Thomas S. Huang, Erik B. Sudderth	Guest Editors' Introduction to the Special Section on Probabilistic Graphical Models.	IEEE Trans. Pattern Anal. Mach. Intell.	2009	DBLP DOI BibTeX RDF
1	Dimitris N. Metaxas, Leon Axel	Editorial.	Medical Image Analysis	2009	DBLP DOI BibTeX RDF
1	Gabriel Tsechpenakis, Dimitris N. Metaxas	CoCRF Deformable Model: A Geometric Model Driven by Collaborative Conditional Random Fields.	IEEE Transactions on Image Processing	2009	DBLP DOI BibTeX RDF
1	Viorel Mihalef, Dimitris N. Metaxas, Mark Sussman	Simulation of two-phase flow with sub-scale droplet and bubble effects.	Comput. Graph. Forum	2009	DBLP DOI BibTeX RDF
1	Dimitris N. Metaxas	Medical modeling special issue: An introduction.	Computer-Aided Design	2009	DBLP DOI BibTeX RDF
1	Peng Yang, Qingshan Liu, Dimitris N. Metaxas	Boosting encoded dynamic features for facial expression recognition.	Pattern Recognition Letters	2009	DBLP DOI BibTeX RDF
1	Junzhou Huang, Xiaolei Huang, Dimitris N. Metaxas	Learning with dynamic group sparsity.	ICCV	2009	DBLP DOI BibTeX RDF
1	Peng Yang, Qingshan Liu, Dimitris N. Metaxas	RankBoost with l1 regularization for facial expression recognition and intensity estimation.	ICCV	2009	DBLP DOI BibTeX RDF
1	Junzhou Huang, Tong Zhang, Dimitris N. Metaxas	Learning with structured sparsity.	ICML	2009	DBLP DOI BibTeX RDF
1	Gowri Somanath, M. V. Rohith, Dimitris N. Metaxas, Chandra Kambhamettu	D - Clutter: Building object model library from unsupervised segmentation of cluttered scenes.	CVPR	2009	DBLP DOI BibTeX RDF
1	Yuchi Huang, Qingshan Liu, Dimitris N. Metaxas	Video object segmentation by hypergraph cut.	CVPR	2009	DBLP DOI BibTeX RDF
1	Ting Chen, Sung N. Kim, Jinghao Zhou, Dimitris N. Metaxas, Gunaretnam Rajagopal, Ning J. Yue	3D Meshless Prostate Segmentation and Registration in Image Guided Radiotherapy.	MICCAI	2009	DBLP DOI BibTeX RDF
1	Viorel Mihalef, Dimitris N. Metaxas, Mark Sussman, Vassilios Hurmusiadis, Leon Axel	Atrioventricular Blood Flow Simulation Based on Patient-Specific Data.	FIMH	2009	DBLP DOI BibTeX RDF
1	Xinyi Cui, Qingshan Liu, Dimitris N. Metaxas	Temporal spectral residual: fast motion saliency detection.	ACM Multimedia	2009	DBLP DOI BibTeX RDF	motion saliency detection, temporal spectral residual, video analysis
1	Jinghao Zhou, Sukmoon Chang, Shaoting Zhang, George J. Pappas, Michael Michaelides, Foteini Delis, Nora D. Volkow, Panayotis K. Thanos, Dimitris N. Metaxas	Segmentation of Rodent Brains from MRI Based on a Novel Statistical Structure Prediction Method.	ISBI	2009	DBLP DOI BibTeX RDF
1	Shaoting Zhang, Xiaoxu Wang, Dimitris N. Metaxas, Ting Chen, Leon Axel	LV Surface Reconstruction from Sparse TMRI Using Laplacian Surface Deformation and Optimization.	ISBI	2009	DBLP DOI BibTeX RDF
1	Nicholas Michael, Dimitris N. Metaxas, Carol Neidle	Spatial and temporal pyramids for grammatical expression recognition of American sign language.	ASSETS	2009	DBLP DOI BibTeX RDF	kernel codebooks, pyramid match kernel, soft quantization, spatio-temporal pyramids, face tracking, sign language recognition, head pose estimation, expression recognition
1	Xiaolei Huang, Dimitris N. Metaxas	Metamorphs: Deformable Shape and Appearance Models.	IEEE Trans. Pattern Anal. Mach. Intell.	2008	DBLP DOI BibTeX RDF
1	Viorel Mihalef, Samet Kadioglu, Mark Sussman, Dimitris N. Metaxas, Vassilios Hurmusiadis	Interaction of two-phase flow with animated models.	Graphical Models	2008	DBLP DOI BibTeX RDF
1	Qingshan Liu, Dimitris N. Metaxas	Unifying Subspace and Distance Metric Learning with Bhattacharyya Coefficient for Image Classification.	ETVC	2008	DBLP DOI BibTeX RDF
1	Zhenglong Li, Qingshan Liu, Hanqing Lu, Dimitris N. Metaxas	Lennard-Jones force field for Geometric Active Contour.	ICPR	2008	DBLP DOI BibTeX RDF
1	Peng Yang, Qingshan Liu, Dimitris N. Metaxas	Similarity Features for Facial Event Analysis.	ECCV	2008	DBLP DOI BibTeX RDF
1	Junzhou Huang, Xiaolei Huang, Dimitris N. Metaxas	Simultaneous image transformation and sparse representation recovery.	CVPR	2008	DBLP DOI BibTeX RDF
1	Peng Yang, Qingshan Liu, Xinyi Cui, Dimitris N. Metaxas	Facial expression recognition using encoded dynamic features.	CVPR	2008	DBLP DOI BibTeX RDF
1	Xiaoxu Wang, Dimitris N. Metaxas, Ting Chen, Leon Axel	Meshless deformable models for LV motion analysis.	CVPR	2008	DBLP DOI BibTeX RDF
1	Liefeng Bo, Cristian Sminchisescu, Atul Kanaujia, Dimitris N. Metaxas	Fast algorithms for large scale conditional 3D prediction.	CVPR	2008	DBLP DOI BibTeX RDF
1	Zhen Qian, Qingshan Liu, Dimitris N. Metaxas, Leon Axel	Identifying Regional Cardiac Abnormalities from Myocardial Strains Using Spatio-temporal Tensor Analysis.	MICCAI	2008	DBLP DOI BibTeX RDF
1	Xiaoxu Wang, Ting Chen, Shaoting Zhang, Dimitris N. Metaxas, Leon Axel	LV Motion and Strain Computation from tMRI Based on Meshless Deformable Models.	MICCAI	2008	DBLP DOI BibTeX RDF
1	Ting Chen, Xiaoxu Wang, Dimitris N. Metaxas, Leon Axel	Fast Motion Tracking of Tagged MRI Using Angle-Preserving Meshless Registration.	MICCAI	2008	DBLP DOI BibTeX RDF	meshless, registration, motion tracking, tagged MRI
1	Dimitris N. Metaxas, Leon Axel, Gabor Fichtinger, Gábor Székely (eds.)	Medical Image Computing and Computer-Assisted Intervention - MICCAI 2008, 11th International Conference, New York, NY, USA, September 6-10, 2008, Proceedings, Part I	MICCAI	2008	DBLP BibTeX RDF
1	Christophe Restif, Dimitris N. Metaxas	Tracking the Swimming Motions of C. elegansWorms with Applications in Aging Studies.	MICCAI	2008	DBLP DOI BibTeX RDF
1	Tian Shen, Yaoyao Zhu, Xiaolei Huang, Junzhou Huang, Dimitris N. Metaxas, Leon Axel	Active Volume Models with Probabilistic Object Boundary Prediction Module.	MICCAI	2008	DBLP DOI BibTeX RDF
1	Junzhou Huang, Zhen Qian, Xiaolei Huang, Dimitris N. Metaxas, Leon Axel	Tag Separation in Cardiac Tagged MRI.	MICCAI	2008	DBLP DOI BibTeX RDF
1	Chunming Li, Rui Huang, Zhaohua Ding, Chris Gatenby, Dimitris N. Metaxas, John C. Gore	A Variational Level Set Approach to Segmentation and Bias Correction of Images with Intensity Inhomogeneity.	MICCAI	2008	DBLP DOI BibTeX RDF
1	Dimitris N. Metaxas, Leon Axel, Gabor Fichtinger, Gábor Székely (eds.)	Medical Image Computing and Computer-Assisted Intervention - MICCAI 2008, 11th International Conference, New York, NY, USA, September 6-10, 2008, Proceedings, Part II	MICCAI	2008	DBLP BibTeX RDF
1	Ting Chen, Xiaoxu Wang, Dimitris N. Metaxas, Leon Axel	3D cardiac motion tracking using Robust Point Matching and meshless deformable models.	ISBI	2008	DBLP DOI BibTeX RDF
1	Zhen Qian, Dimitris N. Metaxas, Leon Axel	Non-tracking-based 2D strain estimation in tagged MRI.	ISBI	2008	DBLP DOI BibTeX RDF
1	Jinghao Zhou, Sukmoon Chang, Qingshan Liu, George J. Pappas, Vasilios Boronikolas, Michael Michaelides, Nora D. Volkow, Panayotis K. Thanos, Dimitris N. Metaxas	A novel learning based segmentation method for rodent brain structures using MRI.	ISBI	2008	DBLP DOI BibTeX RDF
1	Kyungha Min, Dimitris N. Metaxas	A combustion-based technique for fire animation and visualization.	The Visual Computer	2007	DBLP DOI BibTeX RDF	Natural phenomena, Fluid simulation, Fire, Photon mapping
1	Cristian Sminchisescu, Atul Kanaujia, Dimitris N. Metaxas	BM3E : Discriminative Density Propagation for Visual Tracking.	IEEE Trans. Pattern Anal. Mach. Intell.	2007	DBLP DOI BibTeX RDF	computer vision, tracking, motion, video analysis, statistical models
1	Jerome Zhengrong Liang, Hongbing Lu, Dimitris N. Metaxas, Joseph M. Reinhardt	Guest Editorial: Medical Imaging Informatics - an Information Processing from Image Formation to Visualization.	Int. J. Image Graphics	2007	DBLP DOI BibTeX RDF
1	Viorel Mihalef, Dimitris N. Metaxas, Mark Sussman	Textured Liquids based on the Marker Level Set.	Comput. Graph. Forum	2007	DBLP DOI BibTeX RDF
1	Christian Vogler, Siome Goldenstein, Jorge Stolfi, Vladimir Pavlovic, Dimitris N. Metaxas	Outlier rejection in high-dimensional deformable models.	Image Vision Comput.	2007	DBLP DOI BibTeX RDF
1	Rong Zhang, Christian Vogler, Dimitris N. Metaxas	Human gait recognition at sagittal plane.	Image Vision Comput.	2007	DBLP DOI BibTeX RDF
1	Rui Huang, Vladimir Pavlovic, Dimitris N. Metaxas	A Graphical Model Framework for Image Segmentation.	Applied Graph Theory in Computer Vision and Pattern Recognition	2007	DBLP DOI BibTeX RDF
1	Zhiguo Li, Qingshan Liu, Dimitris N. Metaxas	Face Mis-alignment Analysis by Multiple-Instance Subspace.	ACCV	2007	DBLP DOI BibTeX RDF
1	Dimitris N. Metaxas, Atul Kanaujia, Zhiguo Li	Dynamic Tracking of Facial Expressions Using Adaptive, Overlapping Subspaces.	International Conference on Computational Science	2007	DBLP DOI BibTeX RDF
1	Yuchi Huang, Qingshan Liu, Dimitris N. Metaxas	A Component Based Deformable Model for Generalized Face Alignment.	ICCV	2007	DBLP DOI BibTeX RDF
1	Christian Vogler, Zhiguo Li, Atul Kanaujia, Siome Goldenstein, Dimitris N. Metaxas	The Best of Both Worlds: Combining 3D Deformable Models with Active Shape Models.	ICCV	2007	DBLP DOI BibTeX RDF
1	Christopher Russell, Dimitris N. Metaxas, Christophe Restif, Philip H. S. Torr	Using the Pn Potts model with learning methods to segment live cell images.	ICCV	2007	DBLP DOI BibTeX RDF
1	Gabriel Tsechpenakis, Jianhua Wang, Brandon Mayer, Dimitris N. Metaxas	Coupling CRFs and Deformable Models for 3D Medical Image Segmentation.	ICCV	2007	DBLP DOI BibTeX RDF
1	Atul Kanaujia, Cristian Sminchisescu, Dimitris N. Metaxas	Spectral Latent Variable Models for Perceptual Inference.	ICCV	2007	DBLP DOI BibTeX RDF
1	Rui Huang, Vladimir Pavlovic, Dimitris N. Metaxas	Embedded Profile Hidden Markov Models for Shape Analysis.	ICCV	2007	DBLP DOI BibTeX RDF
1	Junzhou Huang, Xiaolei Huang, Dimitris N. Metaxas	Optimization and Learning for Registration of Moving Dynamic Textures.	ICCV	2007	DBLP DOI BibTeX RDF
1	Atul Kanaujia, Dimitris N. Metaxas	Large Scale Learning of Active Shape Models.	ICIP	2007	DBLP DOI BibTeX RDF

Publications of "Dimitris N. Metaxas" ( http://dblp.L3S.de/Authors/Dimitris_N._Metaxas )