https://members.noa.gr/themelis/ 2026-04-07T21:35:07+03:00 https://members.noa.gr/themelis/ https://members.noa.gr/themelis/lib/tpl/bootstrap3/images/favicon.ico text/html 2017-10-06T12:37:43+03:00 themelis https://members.noa.gr/themelis/doku.php/contact?rev=1507282663&do=diff This is my old webpage. A recent version is here. Contact information Konstantinos Themelis Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing National Observatory of Athens I. Metaxa & Vas. Pavlou St. GR-15236, Penteli, Greece text/html 2017-10-06T12:37:28+03:00 themelis https://members.noa.gr/themelis/doku.php/short_bio_cv?rev=1507282648&do=diff This is my old webpage. A recent version is here. Short Bio and CV Born in Piraeus, Greece, in 1981. Received the diploma degree in computer engineering and informatics from the University of Patras in 2005, and the Ph.D. degree in signal processing from the University of Athens in 2012. When not working I enjoy running, reading, listening to text/html 2017-10-06T12:37:18+03:00 themelis https://members.noa.gr/themelis/doku.php/projects?rev=1507282638&do=diff This is my old webpage. A recent version is here. Projects Greek & EU funded projects * THALES: Secure wireless nonlinear communications at the physical layer, 2012-2105 * ARISTEIA: Advancing Hyperspectral Image Processing for Planetary Mineral Exploration and Thematic Mapping: the Case of Planet Mars, 2012-2015. text/html 2017-10-06T12:37:08+03:00 themelis https://members.noa.gr/themelis/doku.php/publications?rev=1507282628&do=diff This is my old webpage. A recent version is [[https://themelis.github.io/|here]]. ===== Publications ===== \\ \\ \\ /* ==== Submitted papers ===== \\ */ ==== Journal papers ===== - P. V. Giampouras, A. A. Rontogiannis, K. E. Themelis, K. D. Koutroumbas, "Online sparse and low-rank subspace learning from incomplete data: A Bayesian view", Signal Processing, vol. 137, pp. 199-212, Aug. 2017. - P. V. Giampouras, K. E. Themelis, A. A. Rontogiannis, K. D. Koutroumbas, "Simultaneously … text/html 2017-10-06T12:36:58+03:00 themelis https://members.noa.gr/themelis/doku.php/research?rev=1507282618&do=diff This is my old webpage. A recent version is here. Research Highlights A variational Bayes framework for sparse adaptive estimation Abstract Recently, a number of $\ell_1$-norm regularized least squares (LS) type algorithms have been proposed to address the problem of \emph{sparse} adaptive signal estimation and system identification. From a Bayesian perspective, this task is equivalent to maximum a posteriori (MAP) estimation under a sparsity promoting heavy tailed prior for the param… text/html 2017-10-06T12:36:46+03:00 themelis https://members.noa.gr/themelis/doku.php/homepage?rev=1507282606&do=diff This is my old webpage. A recent version is [[https://themelis.github.io/|here]]. ===== Homepage ===== {{:wiki:dscn2366_2_.jpg?nolink&250 |}} \\ Welcome to my homepage! \\ I am a postdoc researcher at the National Observatory of Athens ([[http://www.noa.gr/index.php?lang=en|NOA]]), Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing ([[http://www.space.noa.gr/|IAASARS]]). My research interests are in the area of statistical signal processing and probabilistic mac… text/html 2016-07-04T10:45:52+03:00 themelis https://members.noa.gr/themelis/doku.php/?image=docs%3Acv_themelis.pdf&ns=docs&rev=1467618352&tab_details=history&mediado=diff&do=media text/html 2015-04-27T20:14:14+03:00 themelis https://members.noa.gr/themelis/doku.php/?image=code%3Aagsvb-car_demo_code.zip&ns=code&rev=1430154854&tab_details=history&mediado=diff&do=media text/html 2014-07-10T12:02:38+03:00 themelis https://members.noa.gr/themelis/doku.php/?image=code%3Avb_hsi_cuprite.zip&ns=code&rev=1404982958&tab_details=history&mediado=diff&do=media text/html 2014-05-30T11:00:44+03:00 themelis https://members.noa.gr/themelis/doku.php/?image=docs%3Areport.pdf&ns=docs&rev=1401436844&tab_details=history&mediado=diff&do=media text/html 2014-05-30T10:31:16+03:00 themelis https://members.noa.gr/themelis/doku.php/?image=docs%3Aprogress_report.pdf&ns=docs&rev=1401435076&tab_details=history&mediado=diff&do=media text/html 2014-05-12T11:40:39+03:00 themelis https://members.noa.gr/themelis/doku.php/?image=docs%3Awhispers2014.pdf&ns=docs&rev=1399884039&tab_details=history&mediado=diff&do=media text/html 2014-04-08T12:03:19+03:00 themelis https://members.noa.gr/themelis/doku.php/?image=wiki%3Adscn2366_2_.jpg&ns=wiki&rev=1396947799&tab_details=history&mediado=diff&do=media <img src="https://members.noa.gr/themelis/lib/exe/fetch.php/wiki:dscn2366_2_.jpg?w=457&h=500&t=1396947799&amp;tok=6b4e57" alt="wiki:dscn2366_2_.jpg" /> text/html 2013-12-31T18:44:05+03:00 themelis https://members.noa.gr/themelis/doku.php/?image=code%3Aasvb_demo_code.zip&ns=code&rev=1388508245&tab_details=history&mediado=diff&do=media text/html 2013-12-31T17:26:37+03:00 themelis https://members.noa.gr/themelis/doku.php/?image=screenshot_from_2013-12-31_17_25_34.png&ns=&rev=1388503597&tab_details=history&mediado=diff&do=media <img src="https://members.noa.gr/themelis/lib/exe/fetch.php/screenshot_from_2013-12-31_17_25_34.png?w=500&h=193&t=1388503597&amp;tok=dae655" alt="screenshot_from_2013-12-31_17_25_34.png" />