Giannoutakis Konstantinos
Assistant Professor
Department of Applied Informatics
Curriculum Vitae
Academic Titles
- B.Sc. in Mathematics, Department of Mathematics, University of the Aegean
- M.Sc. in Computational Science, Department of Informatics and Telecommunications, University of Athens
- Ph.D. from the Department of Electrical and Computer Engineering, Democritus University of Thrace
Research Interests
- Scientific Computing
- Parallel Computing
- Numerical linear algebra
- Techniques for the solution of sparse linear systems
- Finite difference and finite element methods
- Algorithms evaluation
Teaching
- ALGORITHM ANALYSIS
(CSC401)
Type
COMPULSORY
Department Abbreviation
AI
Department
DEPARTMENT OF APPLIED INFORMATICS
Course Outlines
Semester: 4nd (Spring) | Course type: Compulsory CS | Weekly hours: 3 | ECTS: 5
Instructors: Satratzemi Maria
General competences
By the completion of the course the student will be acquainted with the basic mathematical concepts for algorithm analysis, will be able to compare the theoretical complexities of the algorithms and apply the basic methodology in developing efficient algorithms.
Course content
1. The concepts of computational problem and algorithm. The detailed and simplified computational model. Examples.
2. Asymptotic analysis. The asymptotic symbols Ο, Θ, Ω. Properties of the asymptotic symbols. The value of Algorithm analysis. The concept of algorithm complexity (Worst, best and average case)
3. Analysis of iterative algorithms
4. Analysis of recursive and divide and conquer algorithms
5. Searching. Algorithms of Sequential searching and Binary. Complexity analysis.
6. Sorting Algorithms Ι: Insertion sort, Selection. Complexity analysis (Worst, best and average).
7. Sorting Algorithms ΙΙ: Quicksort, Mergsort, Complexity analysis (Worst, best and average). Shell sort. Complexity analysis. Comparing sorting algorithms.
8. Sorting Algorithms ΙΙΙ: Counting sort. Radix sort. Complexity analysis
9. Limits in sorting algorithms. Medians and Order statistics.
10. Heaps: Max heap, Heapsort, MinMax heap, Double-ended heap (Deap). Complexity analysis
11. Graphs. Fundamental concepts. Breath first search, Depth first search, Topological order. Minimum Spanning Trees, Prim and Kruskal algorithm. Shortest paths, Shortest paths algorithms - Bellman-Ford, Dijkstra, Floyd. Complexity analysis.
Assessment
Written Final examination 100%
Course bibliography
(One of the following):
59359780 ΕΙΣΑΓΩΓΗ ΣΤΟΥΣ ΑΛΓΟΡΙΘΜΟΥΣ, Τύπος: Σύγγραμμα, Thomas H. Cormen, Charles E. Leiserson, Ronald L. Rivest, Clifford Stein, 2016, ΙΤΕ-ΠΑΝΕΠΙΣΤΗΜΙΑΚΕΣ ΕΚΔΟΣΕΙΣ ΚΡΗΤΗΣ, ISBN: 978-960-524-473-6
18548861 Ανάλυση και σχεδίαση αλγορίθμων, Τύπος: Σύγγραμμα, Παπαρρίζος Κωνσταντίνος, 2010, ΤΖΙΟΛΑ, ISBN: 978-960-418-222-0
13898 ΣΧΕΔΙΑΣΜΟΣ ΑΛΓΟΡΙΘΜΩΝ, Τύπος: Σύγγραμμα, JON KLEINBERG, EVA TARDOS, 2009, ΕΚΔΟΣΕΙΣ ΚΛΕΙΔΑΡΙΘΜΟΣ ΕΠΕ, ISBN: 978-960-461-207-9
68370088 Ανάλυση και Σχεδίαση Αλγορίθμων, 3η Έκδοση, Τύπος: Σύγγραμμα, Levitin Anavy, Mάνος Ρουμελιώτης (επιμέλεια), 2018, Τζιόλα, ISBN: 978-960-418-732-4
Additional material
Course website (http://compus.uom.gr/INF165/)
- DISCRETE MATHEMATICS
(AIC203)
Type
COMPULSORY
Department Abbreviation
AI
Department
DEPARTMENT OF APPLIED INFORMATICS
Course Outlines
Semester: 2nd (Spring) | Course type: Compulsory CS-IS | Weekly hours: 3 | ECTS: 5
Instructors: Petridou Sofia
General competences
The study of discrete objects and relationships among them. The study and implementation of computational methods in finite algebraic structures.
Course content
1. Logic and proof: Statements and Logic - Predicates and quantifiers - Proof techniques - Mathematical induction.
2. Combinatorics: sum and product rules - rules of combinatorics - binomial coefficients.
3. Discrete probability: events and probabilities - conditional probability - random variables and expected values - covariance and correlation.
4. Relations - Operations - Structures: binary relations - representation of binary relations - properties of relations - equivalence relations and partial orders - binary operations - internal operation and equivalence classes - structures - isomorphisms.
5. Modular arithmetic - Cyclic groups: Divisibility - Euclidean algorithm - residues - "exponents" - cyclic groups - computations with big integers.
6. Rings and finite fields: the problem of generators and discrete logarithm - polynomial arithmetic and applications - Algorithms for finite fields - applications.
7. Recursion: sequences - recurrence relations - computation of sums and products.
Assessment
Written Final examination 100%
Course bibliography
(One of the following):
41960368 ΔΙΑΚΡΙΤΑ ΜΑΘΗΜΑΤΙΚΑ, Τύπος: Σύγγραμμα, Στεφανίδης Γιώργος, 2015, ΖΥΓΟΣ, ISBN: 978-618-5063-07-8
13799 ΜΙΑ ΥΠΟΛΟΓΙΣΤΙΚΗ ΕΙΣΑΓΩΓΗ ΣΤΗ ΘΕΩΡΙΑ ΑΡΙΘΜΩΝ ΚΑΙ ΤΗΝ ΑΛΓΕΒΡΑ, Τύπος: Σύγγραμμα, VICTOR SHOUP, 2007, ΕΚΔΟΣΕΙΣ ΚΛΕΙΔΑΡΙΘΜΟΣ ΕΠΕ, ISBN: 978-960-209-990-2
13953 ΔΙΑΚΡΙΤΑ ΜΑΘΗΜΑΤΙΚΑ ΜΕ ΕΦΑΡΜΟΓΕΣ, Τύπος: Σύγγραμμα, SUSANNA S. EPP, 2010, ΕΚΔΟΣΕΙΣ ΚΛΕΙΔΑΡΙΘΜΟΣ ΕΠΕ, ISBN: 978-960-461-325-0
Additional material
- LINEAR ALGEBRA
(AIC102)
Type
COMPULSORY
Department Abbreviation
AI
Department
DEPARTMENT OF APPLIED INFORMATICS
Course Outlines
Εξάμηνο: 1ο (Χειμερινό) | Κατεύθυνση: ΕΤΥ-ΠΣ | Υποχρεωτικό Κορμού | Εβδ.διδασκαλία: 3 | Πιστωτικές Μονάδες (ECTS): 5
Διδάσκοντες: Σιφαλέρας Άγγελος
Μαθησιακά αποτελέσματα
Η Γραμμική Άλγεβρα, έχει συνεισφέρει σημαντικά στην ανάπτυξη διαφόρων κλάδων των Μαθηματικών, ενώ επίσης βρίσκει εφαρμογές στην Οικονομία, την Πληροφορική, και τη Μηχανική. Ο λογισμός των πινάκων καθώς και άλλες βασικές έννοιες όπως π.χ. οι διανυσματικοί χώροι, αποτελούν βασικά εργαλεία για την κατανόησή και μελέτη των γραμμικών συναρτήσεων. Οι φοιτητές/τριες που ολοκληρώνουν με επιτυχία το μάθημα θα έχουν αποκτήσει:
i. κατανόηση των βασικών εννοιών της Γραμμικής Άλγεβρας,
ii. ικανότητα διαμόρφωσης και επίλυσης προβλημάτων Γραμμικής Άλγεβρας χρησιμοποιώντας αναλυτικές μεθόδους.
iii. ικανότητα χρήσης λογισμικού σε σύγχρονες γλώσσες προγραμματισμού (π.χ. SageMath) για την επίλυση προβλημάτων Γραμμικής Άλγεβρας.
Το μάθημα αποσκοπεί στις ακόλουθες γενικές ικανότητες:
• Λήψη αποφάσεων
• Εργασία σε διεπιστημονικό περιβάλλον
• Αναζήτηση, ανάλυση και σύνθεση δεδομένων και πληροφοριών, με τη χρήση και των απαραίτητων τεχνολογιών
• Παράγωγή νέων ερευνητικών ιδεών
Περιεχόμενο μαθήματος
Στην πρώτη ενότητα του μαθήματος παρουσιάζονται ορισμένες θεμελιώδεις εισαγωγικές έννοιες, σχετικά με πίνακες. Στη δεύτερη ενότητα εισάγονται και μελετώνται οι διανυσματικοί χώροι και οι υπόχωροι τους, καθώς επίσης περιγράφεται και η σχέση της γραμμικής εξάρτησης. Τέλος, στην τρίτη ενότητα μελετάται το πρόβλημα των ιδιοτιμών, καθώς και θέματα που αφορούν στη διαγωνιοποίηση πίνακα και στον υπολογισμό των δυνάμεων ενός πίνακα.
• βασικά στοιχεία Γραμμικής Άλγεβρας,
• πίνακες (ορισμοί - ιδιότητες πράξεων),
• γραμμικά συστήματα,
• διανυσματικοί χώροι - εφαρμογές,
• προβολές – γραμμικοί μετασχηματισμοί,
• ιδιοτιμές – ιδιοδιανύσματα, και
• εξοικείωση με το λογισμικό SageMath.
Αξιολόγηση φοιτητών
Η γλώσσα αξιολόγησης είναι στην Ελληνική. Η μέθοδος αξιολόγησης αφορά σε γραπτή εξέταση στο τέλος του εξαμήνου.
Τα κριτήρια αξιολόγησης είναι αναρτημένα στην ιστοσελίδα του μαθήματος (Compus), ώστε να είναι προσβάσιμα στους φοιτητές.
Βιβλιογραφία
(Ένα από τα παρακάτω:)
41960366 ΓΡΑΜΜΙΚΗ ΑΛΓΕΒΡΑ ΜΕ ΤΟ MATLAB : ΝΕΑ ΕΚΔΟΣΗ, Τύπος: Σύγγραμμα, Στεφανίδης Γιώργος, 2014, ΖΥΓΟΣ, ISBN: 978-618-5063-08-5
31174 Γραμμική άλγεβρα, Τύπος: Σύγγραμμα, Δονάτος Γεώργιος Σ., Αδάμ Μαρία Χ., 2008, Gutenberg, ISBN: 978-960-01-1193-4
50659814 Γραμμική Άλγεβρα, Τύπος: Σύγγραμμα, Μάργαρης Αθανάσιος, 2015, ΤΖΙΟΛΑ, ISBN: 978-960-418-471-2
Συμπληρωματικό υλικό
Σημειώσεις και Ασκήσεις
- MATHEMATICAL ANALYSIS
(AIC104)
Type
COMPULSORY
Department Abbreviation
AI
Department
DEPARTMENT OF APPLIED INFORMATICS
Course Outlines
Εξάμηνο: 1ο (Χειμερινό) | Κατεύθυνση: ΕΤΥ-ΠΣ | Υποχρεωτικό Κορμού | Εβδ.διδασκαλία: 3 | Πιστωτικές Μονάδες (ECTS): 5
Διδάσκοντες: Χρήστου - Βαρσακέλης Δημήτριος, Χαλκίδης Σπυρίδων
Μαθησιακά αποτελέσματα
Με την επιτυχή ολοκλήρωση του μαθήματος, οι φοιτητές/τριες:
• θα κατανοούν βασικές έννοιες και τεχνικές απο τη μαθηματική ανάλυση, οι οποίες είναι απαραίτητες για την υποστήριξη των σπουδών τους στην Εφ. Πληροφορική.
• θα μπορούν να επιλύουν μαθηματικά προβλήματα πρακτικού ενδιαφέροντος, συνδέοντας την θεωρία με την πράξη.
• θα αντιλαμβάνονται τα Μαθηματικά ως βασικό εργαλείο επίλυσης προβλημάτων στο χώρο της πληροφορικής αλλά και πέραν αυτού.
• Κριτική/αναλυτική σκέψη
• Επίλυση αυστηρά δομημένων προβλημάτων
• Ποσοτική συλλογιστική
• Αυτόνομη εργασία
• Προαγωγή της ελεύθερης, δημιουργικής και επαγωγικής σκέψης
Περιεχόμενο μαθήματος
- Μετρικοί χώροι
- Συνεχείς συναρτήσεις – Παράγωγος συνάρτησης
- Ακολουθίες – σύγκλιση
- Σειρές – σύγκλιση
- Σειρές Taylor
- Ακρότατα συνάρτησης πολλών μεταβλητών
- Βελτιστοποίηση με περιορισμούς ισότητας
- Διαφορικές εξισώσεις
- εξισώσεις διαφορών
Αξιολόγηση φοιτητών
Γλώσσα αξιολόγησης: Ελληνική
Η αξιολόγηση θα γίνεται μέσω α) εργασιών/ασκήσεων που θα εκπονηθούν στη διάρκεια του εξαμήνου (30%), και β) γραπτής εξέτασης (επίλυση προβλημάτων) (70%).
Τα κριτήρια αξιολόγησης είναι προσβάσιμα απο τους φοιτητές στην ιστοσελίδα του μαθήματος.
Βιβλιογραφία
(Ένα από τα παρακάτω:)
50655961 Οικονομικά Μαθηματικά, Τύπος: Σύγγραμμα, Μυλωνάς Νίκος, Γεώργιος Σαραφόπουλος, 2015, ΤΖΙΟΛΑ, ISBN: 978-960-418-564-1
41962521 ΠΡΟΣΚΛΗΣΗ ΣΤΑ ΜΑΘΗΜΑΤΙΚΑ ΟΙΚΟΝΟΜΙΚΩΝ ΚΑΙ ΔΙΟΙΚΗΤΙΚΩΝ ΕΠΙΣΤΗΜΩΝ ΤΟΜΟΣ Β', Τύπος: Σύγγραμμα, ΛΟΥΚΑΚΗΣ ΜΑΝΩΛΗΣ, 2014, "σοφία", ISBN: 978-960-6706-75-2
22767283 Μαθηματικά Οικονομικών Επιστημών, Τύπος: Σύγγραμμα, Hoy Michael, Livernois John, McKenna Chris, Stengos Thanasis, Κυρίτσης Ιωάννης (επιμ.), 2012, Gutenberg, ISBN: 978-960-01-1535-2
Συμπληρωματικό υλικό
Σημειώσεις και διαφάνειες μαθήματος
Publications
- Books (27 records)
Περιλαμβάνει Βιβλία ή/και μονογραφίες σε διεθνείς ή ελληνικούς εκδοτικούς οίκους. Κεφάλαια ή άρθρα συλλογικών τόμων ή επιμέλεια τόμων σε διεθνείς ή ελληνικούς εκδοτικούς οίκους.
2023
- Δημήτριος Χρήστου-Βαρσακέλης, Κωνσταντίνος Γιαννουτάκης. "Οδηγός στα εφαρμοσμένα Μαθηματικά", Broken Hill Publishers Ltd
2020
- Patricia Takako Endo, Christos Filelis Papadopoulos, Sergej Svorobej, Anna Gourinovitch, Konstantinos Giannoutakis, George Gravvanis, Dimitrios Tzovaras, Divyaa Manimaran Elango, James Byrne, and Theo Lynn. "Recap (reliable capacity provisioning and enhanced remediation for distributed cloud applications): The simulation approach". Advances in Service Oriented and Cloud Computing, pages 219–225, Cham, 2020. Springer International Publishing
- Konstantinos M. Giannoutakis, Minas Spanopoulos-Karalexidis, Christos K. Filelis Papadopoulos, and Dimitrios Tzovaras. "Next generation cloud architectures". The Cloud-to-Thing Continuum: Opportunities and Challenges in Cloud, Fog and Edge Computing, pages 23–39, 2020
- Minas Spanopoulos-Karalexidis, Christos K. Filelis Papadopoulos, Konstantinos M. Giannoutakis, George A. Gravvanis, Dimitrios Tzovaras, Malika Bendechache, Sergej Svorobej, Patricia Takako Endo, and Theo Lynn. "Simulating across the cloud-to-edge continuum". Managing Distributed Cloud Applications and Infrastructure: A Self-Optimising Approach, pages 93–115, 2020
2019
- Evangelos K. Markakis, Yannis Nikoloudakis, Evangelos Pallis, Georgios Sakellariou, Stavros Salonikias, Nikolaos Tsinganos, Anargyros Sideris, Nikolaos Zotos, Anastasios Drosou, Konstantinos. M Giannoutakis, and Dimitrios Tzovaras. "The fortika accelerated edge solution for automating SMEs security". European Landscape on Cybersecurity and Privacy Research Challenges, 2019
2018
- Antonios T. Makaratzis, Malik M. Khan, Konstantinos M. Giannoutakis, Anne C. Elster, and Dimitrios Tzovaras. "GPU power modeling of HPC applications for the simulation of heterogeneous clouds", Parallel Processing and Applied Mathematics, pages 91–101, Cham, 2018. Springer International Publishing
- A. Collen, N. A. Nijdam, J. Augusto Gonzalez, S. K. Katsikas, K. M. Giannoutakis, G. Spathoulas, E. Gelenbe, K. Votis, D. Tzovaras, N. Ghavami, M. Volkamer, P. Haller, A. Sanchez, and M. Dimas. "GHOST - safe-guarding home IoT environments with personalised real-time risk control", Security in Computer and Information Sciences, pages 68–78, Cham, 2018. Springer International Publishing.
- Charalampos S. Kouzinopoulos, Georgios Spathoulas, Konstantinos M. Giannoutakis, Konstantinos Votis, Pankaj Pandey, Dimitrios Tzovaras, Sokratis K., Katsikas, Anastasija Collen, and Niels A. Nijdam. "Using blockchains to strengthen the security of internet of things", Security in Computer and Information Sciences, pages 90–100. Springer International Publishing, Cham, 2018
- Christos K. Filelis-Papadopoulos, Konstantinos M. Giannoutakis, George A. Gravvanis, Charalampos S. Kouzinopoulos, Antonios T. Makaratzis, and Dimitrios Tzovaras. "Simulating heterogeneous clouds at scale". Heterogeneity, High Performance Computing, Self-Organization and the Cloud, Springer International Publishing, pages 119–150, 2018
2017
- Konstantinos M. Giannoutakis and Dimitrios Tzovaras. "The european strategy in research infrastructures and open science cloud", Data Analytics and Management in Data Intensive Domains: XVIII International Conference, DAMDID/RCDL 2016, Ershovo, Moscow, Russia, October 11 14, 2016, Revised Selected Papers, pages 207–221. Springer International Publishing, Cham, 2017
2014
- Nikolaos Kaklanis, Konstantinos Votis, Konstantinos Giannoutakis, and Dimitrios Tzovaras. "A semantic framework for assistive technologies description to strengthen UI adaptation", Universal Access in Human Computer Interaction. Design and Development Methods for Universal Access: 8th International Conference, UAHCI 2014, Held as Part of HCI International 2014, Heraklion, Crete, Greece, June 2227, 2014, Proceedings, Part I, pages 236–245. Springer International Publishing, Cham, 2014.
- Nikolaos Kaklanis, Konstantinos Votis, Konstantinos Giannoutakis, Dimitrios Tzovaras, Valerio Gower, and Renzo Andrich. "A unified semantic framework for detailed description of assistive technologies based on the eastin taxonomy", Computers Helping People with Special Needs: 14th International Conference, ICCHP 2014, Paris, France, July 911, 2014, Proceedings, Part II, pages 275–282. Springer International Publishing, Cham, 2014
2012
- Γεώργιος Α. Γραββάνης και Κωνσταντίνος Μ. Γιαννουτάκης. "Προγραμματισμός με τη χρήση MATLAB". Εκδόσεις Παπασωτηρίου, ISBN 978-960-491-057-1
- Γεώργιος Α. Γραββάνης, Κωνσταντίνος Μ. Γιαννουτάκης και Χρήστος Παπαδόπουλος-Φιλέλης. "Προγραμματισμός σε σύγχρονα υπολογιστικά συστήματα: MPI, OpenMP, Pthreads, Cuda", Εκδόσεις Παπασωτηρίου, ISBN 978-960-491-058-8
2011
- George A. Gravvanis, Christos K. Filelis-Papadopoulos, and Konstantinos M. Giannoutakis. "Parallel approximate inverse preconditioning using the finite difference method: The general purpose graphics processing units approach". Trends in Parallel, Distributed, Grid and Cloud Computing for Engineering, Saxe-Coburg Publications, pages 291–319, 2011
2010
- Dionisis D. Kehagias, Efthimia Mavridou, Konstantinos M. Giannoutakis, and Dimitrios Tzovaras. "A WSDL structure based approach for semantic categorization of web service elements", Artificial Intelligence: Theories, Models and Applications: 6th Hellenic Conference on AI, SETN 2010, Athens, Greece, May 47, 2010. Proceedings, pages 333–338. Springer Berlin Heidelberg, Berlin, Heidelberg, 2010
- George A. Gravvanis, Konstantinos M. Giannoutakis, and Nikolaos D. Iatridis. "Fast pagerank computation for web information retrieval by parallel generalized approximate inverse preconditioning". In B.H.V. Topping, J.M. Adam, F.J. Pallares, R. Bru, and M.L. Romero, editors, Developments and Applications in Engineering Computational Technology, pages 307–335. Saxe-Coburg Publications, 2010
- Γεώργιος Α. Γραββάνης και Κωνσταντίνος Μ. Γιαννουτάκης. "Εισαγωγή στο Mathematica". Εταιρεία Αξιοποίησης και Διαχείρισης της Περιουσίας του Δημοκριτείου Πανεπιστημίου Θράκης
2009
- George A. Gravvanis and Konstantinos M. Giannoutakis. "High performance preconditioned iterative methods". Parallel, Distributed and Grid Computing for Engineering, Saxe-Coburg Publications, pages 275–308, 2009
2008
- Konstantinos M. Giannoutakis and George A. Gravvanis. "Parallel approximate finite element inverses on symmetric multiprocessor systems". Computational Science – ICCS 2008: 8th International Conference, Krakow, Poland, June 2325, 2008, Proceedings, Part I, pages 925–934. Springer Berlin Heidelberg, Berlin, Heidelberg, 2008
2006
- George A. Gravvanis and Konstantinos M. Giannoutakis. "Parallel exact and approximate arrow-type inverses on symmetric multiprocessor systems".Computational Science – ICCS 2006: 6th International Conference, Reading, UK, May 2831, 2006, Proceedings, Part I, pages 506–513. Springer Berlin Heidelberg, Berlin, Heidelberg, 2006
- Michail P. Bekakos, George A. Gravvanis, Evangelos S. Bazoukis, and Konstantinos M. Giannoutakis. "Towards a pilot grid platform for internet high performance computations". Grid Technologies: Emerging from Distributed Architectures to Virtual Organizations, WIT Press., pages 363–389, 2006
2005
- George A. Gravvanis and Konstantinos M. Giannoutakis. "Parallel normalized implicit preconditioned conjugate gradient methods for solving biharmonic equations".Third MIT Conference on Computational Fluid and Solid Mechanics, pages 1120–1125. Elsevier, 2005
- George A. Gravvanis and Konstantinos M. Giannoutakis. "Normalized implicit preconditioned methods based on normalized finite element approximate factorization procedures". Third MIT Conference on Computational Fluid and Solid Mechanics, pages 1115–1119. Elsevier, 2005
- George A. Gravvanis and Konstantinos M. Giannoutakis. "Solving nonlinear finite difference systems by normalized approximate inverses". Computational and Information Science: First International Symposium, CIS 2004, Shanghai, China, December 16-18, 2004. Proceedings, pages 111–117. Springer Berlin Heidelberg, Berlin, Heidelberg, 2005
2003
- George A. Gravvanis and Konstantinos M. Giannoutakis. "Normalized finite element approximate inverse preconditioning for solving nonlinear boundary value problems". Second MIT Conference on Computational Fluid and Solid Mechanics, pages 1958–1962. Elsevier, 2003
- George A. Gravvanis and Konstantinos M. Giannoutakis. "On the rate of convergence and complexity of finite element normalized explicit approximate inverse preconditioning". Second MIT Conference on Computational Fluid and Solid Mechanics, pages 1963–1967. Elsevier, 2003
- Scientific Journals (37 records)
Περιλαμβάνει Άρθρα σε διεθνή ή ελληνικά επιστημονικά περιοδικά (με κριτές).
2023
- Anastasia A Natsiou, George A Gravvanis, Christos K Filelis-Papadopoulos, Konstantinos M Giannoutakis. "An aggregation-based algebraic multigrid method with deflation techniques and modified generic factored approximate sparse inverses", Mathematics, 11(3), 2023
- Athanasios I Salamanis, George A Gravvanis, Sotiris Kotsiantis, Konstantinos M Giannoutakis. "A generic sparse regression imputation method for time series and tabular data", Knowledge-Based Systems, Volume 279, 2023
2021
- Giannoutakis, Konstantinos M., Christos K. Filelis-Papadopoulos, George A. Gravvanis, and Dimitrios Tzovaras. "Evaluation of self-organizing and self-managing heterogeneous high performance computing clouds through discrete-time simulation". Concurrency and Computation: Practice and Experience, 33(17):e6326, 2021
- Konstantinos M. Giannoutakis, Christos K. Filelis-Papadopoulos, George A. Gravvanis, and Dimitrios Tzovaras. "On the optimization of self-organization and self-management hardware resource allocation for heterogeneous clouds". Computers, 10(11), 2021
2020
- Christos K. Filelis-Papadopoulos, Patricia Takako Endo, Malika Bendechache, Sergej Svorobej, Konstantinos M. Giannoutakis, George A. Gravvanis, Dimitrios Tzovaras, James Byrne, and Theo Lynn. "Towards simulation and optimization of cache placement on large virtual content distribution networks". Journal of Computational Science, 39:101052, 2020
2019
- E. Markakis, Y. Nikoloudakis, G. Mastorakis, C. X. Mavromoustakis, E. Pallis, A. Sideris, N. Zotos, J. Antic, A. Cernivec, D. Fejzic, J. Kulovic, A. Jara, A. Drosou, K. Giannoutakis, and D. Tzovaras. "Acceleration at the edge for supporting SMEs security: The fortika paradigm". IEEE Communications Magazine, 57(2):41–47, February 2019.
- Sergej Svorobej, Patricia Takako Endo, Malika Bendechache, Christos Filelis-Papadopoulos, Konstantinos M. Giannoutakis, George A. Gravvanis, Dimitrios Tzovaras, James Byrne, and Theo Lynn. "Simulating fog and edge computing scenarios: An overview and research challenges". Future Internet, 11(3), 2019.
- Christos K. Filelis-Papadopoulos, Konstantinos M. Giannoutakis, George A. Gravvanis, Patricia Takako Endo, Dimitrios Tzovaras, Sergej Svorobej, and Theo Lynn. "Simulating large vCDN networks: A parallel approach". Simulation Modelling Practice and Theory, 92:100–114, 2019
2018
- Efthimia Mavridou, Konstantinos M. Giannoutakis, Dionysios Kehagias, Dimitrios Tzovaras, and George Hassapis. "Automatic categorization of web service elements". International Journal of Web Information Systems, 14(2):233–258, 2018
- Christos K. Filelis-Papadopoulos, Konstantinos M. Giannoutakis, George A. Gravvanis, and Dimitrios Tzovaras. "Large-scale simulation of a self-organizing self-management cloud computing framework". The Journal of Supercomputing, 74(2):530–550, Feb 2018
- Antonios T. Makaratzis, Konstantinos M. Giannoutakis, and Dimitrios Tzovaras. "Energy modeling in cloud simulation frameworks". Future Generation Computer Systems, 79:715 – 725, 2018
2015
- Dimitris Giakoumis, Efthimia Mavridou, Konstantinos Votis, Konstantinos Giannoutakis, DimitriosTzovaras, and George Hassapis. "A semantic framework to support the management of cloud-based service provision within a global public inclusive infrastructure". International Journal of Electronic Commerce, 20(1):142–173, 2015
- Erina Ferro, Michele Girolami, Dario Salvi, Christopher Mayer, Joe Gorman, Andrej Grguric, Roni Ram, Rubaiyat Sadat, Konstantinos M Giannoutakis, and Carsten Stocklöw. "The universaal platform for aal (ambient assisted living)". Journal of Intelligent Systems, 24(3):301–319, 2015
2013
- George A Gravvanis, Christos K Filelis-Papadopoulos, Konstantinos M Giannoutakis, and Elias A Lipitakis. "A note on parallel finite difference approximate inverse preconditioning on multicore systems using posix threads". International Journal of Computational Methods, 10(05):1350032, 2013
2012
- Dionysios D Kehagias, Konstantinos M Giannoutakis, George A Gravvanis, and Dimitrios Tzovaras. "An ontology-based mechanism for automatic categorization of web services". Concurrency and Computation: Practice and Experience, 24(3):214–236, 2012
- George A Gravvanis, Christos K Filelis-Papadopoulos, and Konstantinos M Giannoutakis. "Solving finite difference linear systems on gpus: Cuda based parallel explicit preconditioned biconjugate conjugate gradient type methods". The Journal of Supercomputing, pages 1–15, 2012
- George A Gravvanis, PI Matskanidis, Konstantinos M Giannoutakis, and Elias A Lipitakis. "On the design and implementation of parallel finite element approximate inverses using posix threads on multicore systems". Engineering Computations, 29(3):338–354, 2012
2011
- George A Gravvanis and Konstantinos M Giannoutakis. "Finite element approximate inverse preconditioning for solving 3D biharmonic problems on shared memory systems". Computer Modeling in Engineering & Sciences(CMES), 71(4):305–330, 2011
- Christos K Filelis-Papadopoulos, George A Gravvanis, PI Matskanidis, and Konstantinos M Giannoutakis. "On the gpgpu parallelization issues of finite element approximate inverse preconditioning". Journal of computational and applied mathematics, 236(3):294–307, 2011
2009
- Konstantinos M Giannoutakis and George A Gravvanis. "Design and implementation of parallel approximate inverse classes using OpenMP". Concurrency and Computation: Practice and Experience, 21(2):115–131, 2009
2008
- Konstantinos M Giannoutakis and George A Gravvanis. High performance finite element approximate inverse preconditioning. Applied Mathematics and Computation, 201(1):293–304, 2008
- George A Gravvanis and Konstantinos M Giannoutakis. "Fast parallel finite element approximate inverses". Computer Modeling in Engineering and Sciences, 32(1):35–44, 2008
2007
- Konstantinos M Giannoutakis, George A Gravvanis, B Clayton, Adarsh Patil, Therese Enright, and John P Morrison. "Matching high performance approximate inverse preconditioning to architectural platforms". The Journal of Supercomputing, 42(2):145–163, 2007
- George A Gravvanis, Victor N Epitropou, and Konstantinos M Giannoutakis. "On the performance of parallel approximate inverse preconditioning using java multithreading techniques". Applied Mathematics and Computation, 190(1):255–270, 2007
- George A Gravvanis, Konstantinos M Giannoutakis, and Elias A Lipitakis. "On the numerical solution of singularly perturbed non-linear parabolic and elliptic partial differential equations". HERMIS: An International Journal of Computer Mathematics and its Applications, 8:41–60, 2007
2006
- George A Gravvanis and Konstantinos M Giannoutakis. "Normalized explicit preconditioned methods for solving 3d boundary value problems on uniprocessor and distributed systems". Inter. J. Numer. Meth. Eng, 65(1):84–110, 2006
- Konstantinos M Giannoutakis and George A Gravvanis. "A performance study of normalized explicit finite element approximate inverse preconditioning on uniprocessor and multicomputer systems". Engineering computations, 23(3):192–217, 2006
- Konstantinos M Giannoutakis and George A Gravvanis. "Fast normalized approximate inverse preconditioning for solving non-linear finite element systems". Neural, Parallel and Scientific Computations, 14(2):205, 2006
- George A Gravvanis and Konstantinos M Giannoutakis. "Distributed finite element normalized approximate inverse preconditioning". Computer Modeling in Engineering and Sciences, 16(2):69, 2006
2005
- George A Gravvanis and Konstantinos M Giannoutakis. "Parallel preconditioned conjugate gradient square method based on normalized approximate inverses". Scientific Programming, 13(2):79–91, 2005
- Konstantinos M Giannoutakis, George Gravvanis, and Michael Bekakos. "High performance computations using internet and grid technology". Neural, Parallel & Scientific Computations, 13(3):469–488, 2005
2004
- George A Gravvanis, Konstantinos M Giannoutakis, M P Bekakos, and O B Efremides. "Parallel and systolic solution of normalized explicit approximate inverse preconditioning". The Journal of Supercomputing, 30(2):77–96, 2004
- George A Gravvanis and Konstantinos M Giannoutakis. "On the rate of convergence and complexity of normalized implicit preconditioning for solving finite difference equations in three space variables". International Journal of Computational Methods, 1(02):367–386, 2004
- George A Gravvanis and Konstantinos M Giannoutakis. "Normalized explicit finite element approximate inverse preconditioning". Computers & structures, 82(28):2377–2388, 2004
- George A Gravvanis, Konstantinos M Giannoutakis, and Nikolaos Missirlis. "A distributed preconditioned conjugate gradient method". Parallel Algorithms and Applications, 19(2-3):163–174, 2004
2003
- George A Gravvanis and Konstantinos M Giannoutakis. "Normalized explicit finite element approximate inverses". International Journal of Differential Equations and Applications, 6(3):253–267, 2003
- Agapios N Platis, George A. Gravvanis, Konstantinos M. Giannoutakis, and Elias A. Lipitakis. "A two-phase cyclic nonhomogeneous markov chain performability evaluation by explicit approximate inverses applied to a replicated database system". Journal of Mathematical Modelling and Algorithms, 2(3):235–249, 2003
- Conferences (34 records)
Περιλαμβάνει Άρθρα σε δημοσιευμένα πρακτικά διεθνών ή ελληνικών συνεδρίων (με κριτές).
2021
- Argyrios P. Ketsetsis, Giannoutakis, Konstantinos M., Georgios Spanos, Nikolaos Samaras, Dimitrios Hristu-Varsakelis, Dimitrios Thomas, and Dimitrios Tzovaras. "A comparative study of deep learning techniques for financial indices prediction". In Ilias Maglogiannis, John Macintyre, and Lazaros Iliadis, editors, Artificial Intelligence Applications and Innovations, pages 297–308, Cham, 2021. Springer International Publishing
2020
- Eleni Ketzaki, Petros Toupas, Giannoutakis, Konstantinos M., Anastasios Drosou, and Dimitrios Tzovaras. "A behaviour based ransomware detection using neural network models". In 2020 10th International Conference on Advanced Computer Information Technologies (ACIT), pages 747–750, 2020
- G. Spanos, K. M. Giannoutakis, K. Votis, B. Viano, J. Augusto-Gonzalez, G. Aivatoglou, and D. Tzovaras. "A lightweight cyber-security defense framework for smart homes". In 2020 International Conference on INnovations in Intelligent SysTems and Applications (INISTA), pages 1–7, 2020
- K. M. Giannoutakis, G. Spathoulas, C. K. Filelis-Papadopoulos, A. Collen, M. Anagnostopoulos, K. Votis, and N. A. Nijdam. "A blockchain solution for enhancing cybersecurity defence of IoT". In 2020 IEEE International Conference on Blockchain (Blockchain), pages 490–495, 2020
- Argyrios P. Ketsetsis, Christos Kourounis, Georgios Spanos, Giannoutakis, Konstantinos M., Pavlos Pavlidis, Dimitris Vazakidis, Theofanis Champeris, Dimitris Thomas, and Dimitrios Tzovaras. "Deep learning techniques for stock market prediction in the european union: A systematic review". In 2020 International Conference on Computational Science and Computational Intelligence (CSCI), pages 605–610, 2020
2019
- G. Spanos, K. M. Giannoutakis, K. Votis, and D. Tzovaras. "Combining statistical and machine learning techniques in IoTanomaly detection for smart homes". In 2019 IEEE 24th International Workshop on Computer Aided Modeling and Design of Communication Links and Networks (CAMAD), pages 1–6, Sep. 2019
- D. Chamou, P. Toupas, E. Ketzaki, S. Papadopoulos, K. M. Giannoutakis, A. Drosou, and D. Tzovaras. "Intrusion detection system based on network traffic using deep neural networks". In 2019 IEEE 24th International Workshop on Computer Aided Modeling and Design of Communication Links and Networks (CAMAD), pages 1–6, Sep. 2019
- J. Augusto-Gonzalez, A. Collen, S. Evangelatos, M. Anagnostopoulos, G. Spathoulas, K. M. Giannoutakis, K. Votis, D. Tzovaras, B. Genge, E. Gelenbe, and N. A. Nijdam. "From internet of threats to internet of things: A cyber security architecture for smart homes". In 2019 IEEE 24th International Workshop on Computer Aided Modeling and Design of Communication Links and Networks (CAMAD), pages 1–6, Sep. 2019
- P. T. Endo, R. Loomba, R. Quinn, C. K. Filelis-Papadopoulos, K. M. Giannoutakis, G. A. Gravvanis, D. Tzovaras, P.Willis, S. Svorobej, J. Byrne, and T. Lynn. "Analyzing resource distribution over a real-world large-scale virtual content infrastructure". In 2019 IEEE Symposium on Computers and Communications (ISCC), pages 1–7, June 2019
- P. Toupas, D. Chamou, K. M. Giannoutakis, A. Drosou, and D. Tzovaras. "An intrusion detection system for multi-class classification based on deep neural networks". In 2019 18th IEEE International Conference On Machine Learning And Applications (ICMLA), pages 1253–1258, Dec 2019
2018
- G. Spathoulas, A. Collen, P. Pandey, N. A. Nijdam, S. Katsikas, C. S. Kouzinopoulos, M. Ben Moussa, K. M. Giannoutakis, K. Votis, and D. Tzovaras. "Towards reliable integrity in blacklisting: Facing malicious IPs in ghost smart contracts". In 2018 Innovations in Intelligent Systems and Applications (INISTA), pages 1–8, July 2018
- C. S. Kouzinopoulos, K. M. Giannoutakis, K. Votis, D. Tzovaras, A. Collen, N. A. Nijdam, D. Konstantas, G. Spathoulas, P. Pandey, and S. Katsikas. "Implementing a forms of consent smart contract on an IoT-based blockchain to promote user trust". In 2018 Innovations in Intelligent Systems and Applications (INISTA), pages 1–6, July 2018
2017
- James Byrne, Sergej Svorobej, Konstantinos M. Giannoutakis, Dimitrios Tzovaras, PJ Byrne, Per Olov Ostberg, Theo Lynn, and Anna Gourinovitch. "A review of cloud computing simulation platforms and related environments". The 7th International Conference on Cloud Computing and Services Science, pages 651–663, 2017
- Konstantinos M. Giannoutakis, Antonios T. Makaratzis, Dimitrios Tzovaras, Christos K. Filelis-Papadopoulos, and George A. Gravvanis. "On the power consumption modeling for the simulation of heterogeneous HPC clouds". In Proceedings of the 1st International Workshop on Next Generation of Cloud Architectures, CloudNG:17, pages 1:1–1:6, New York, NY, USA, 2017. ACM
- Theo Lynn, Anna Gourinovitch, James Byrne, PJ Byrne, Sergej Svorobej, Konstantinos M. Giannoutakis, David Kenny, and John Morrison. "A preliminary systematic review of computer science literature on cloud computing research using open source simulation platforms". The 7th International Conference on Cloud Computing and Services Science, pages 537–545, 2017
- Antonios T. Makaratzis, Christos K. Filelis-Papadopoulos, Konstantinos M. Giannoutakis, George A. Gravvanis, and Dimitrios Tzovaras. "A comparative study of CPU power consumption models for cloud simulation frameworks". In Proceedings of the 21st Pan-Hellenic Conference on Informatics, PCI 2017, pages 10:1–10:6, New York, NY, USA, 2017. ACM
2016
- Theo Lynn, Huanhuan Xiong, Dapeng Dong, Bilal Momani, George Gravvanis, CF Papadopoulos, AC Elster, MM Zaki Murtaza Khan, Dimitrios Tzovaras, Konstantinos Giannoutakis, Dana Petcu, Marian Neagul, Ioan Dragan, Perumal Kuppudayar, Suryanarayanan Natarajan, Michael McGrath, Georgi Gaydadjiev, Tobias Becker, Anna Gourinovitch, David Kenny, and John Morrison. "Cloudlightning: A framework for a self-organising and self-managing heterogeneous cloud". In 6th International Conference on Cloud Computing and Services Science, CLOSER, volume 2016, 2016
2015
- Konstantinos M. Giannoutakis, Dionysios D. Kehagias, and Dimitrios Tzovaras. "A three-level semantic categorization scheme of web services". In 2015 IEEE 8th International Conference on Service-Oriented Computing and Applications (SOCA), pages 73–77, Oct 2015
2011
- P. I. Matskanidis, G. A. Gravvanis, and K. M. Giannoutakis. "A note on parallel finite element approximate inverses using OpenMP on multicore systems". In 2011 15th Panhellenic Conference on Informatics, pages 259–264, Sep. 2011
2010
- George Gravvanis, Christos Filelis-Papadopoulos, Konstantinos Giannoutakis, and E.A. Lipitakis. "Approximate inverse preconditioning using posix threads on multicore systems". In Conference Proceedings NumAn 2010 - Recent Approaches to Numerical Analysis: Theory, Methods and Applications, 09 2010
- George A. Gravvanis, P.I. Matskanidis, Konstantinos M. Giannoutakis, and Elias A. Lipitakis. "Finite element approximate inverse preconditioning using posix threads on multicore systems". In Proceedings of the International Multiconference on Computer Science and Information Technology, pages 297–302, Oct 2010
2008
- George A. Gravvanis and Konstantinos M. Giannoutakis. "An improved parallel algorithm for computing approximate inverses by reducing synchronizations". In 2008 International Symposium on Parallel and Distributed Computing, pages 237–243, July 2008
- Konstantinos M. Giannoutakis and George A. Gravvanis. "Parallel iterative methods based on finite element approximate inverses on uniprocessor and multicomputer systems". In CDROM Proceedings of the Sixth International Conference on Engineering Computational Technology 2008, 2008
2007
- Victor N. Epitropou, Konstantinos M. Giannoutakis, and George A. Gravvanis. "Java multithreading based parallel preconditioned generalized conjugate gradient type methods". In Parallel and Distributed Computing, 2007. ISPDC ’07. Sixth International Symposium on, pages 42–42, July 2007
- Konstantinos M. Giannoutakis and George A. Gravvanis. "On the design of parallel finite element approximate inverses". In International Conference on Parallel and Distributed Processing Techniques and Applications, pages 292–298, 2007
2006
- George A. Gravvanis and Konstantinos M. Giannoutakis. "On the performance of parallel normalized explicit preconditioned conjugate gradient type methods". In Proceedings 20th IEEE International Parallel Distributed Processing Symposium, April 2006
2005
- George A. Gravvanis, Konstantinos M. Giannoutakis, and Elias A. Lipitakis. "On the numerical solution of fully parameterized singularly perturbed non-linear initial and boundary value problems". In CD-ROM Proceedings of the 17th IMACS World Congress on Scientific Computation, Applied Mathematics and Simulation, 2005
- George A. Gravvanis, Konstantinos M. Giannoutakis, and Elias A. Lipitakis. "Solving fully parameterized singularly perturbed non-linear parabolic and elliptic PDE's by explicit approximate inverse FE matrix algorithmic methods". In CD-ROM Proceedings of the Seventh Hellenic-European Conference on Computer Mathematics and Its Applications (HERCMA2005), Athens, pages 22–24, 2005
2004
- George A. Gravvanis and Konstantinos M. Giannoutakis. "Normalized isomorphic preconditioned methods for solving sparse non-linear systems". In Proceedings of the International Conference on Algorithmic Mathematics & Computer Science, pages 362–369, 2004
- George A. Gravvanis, Konstantinos M. Giannoutakis, and Michail P. Bekakos. "Parallel finite element approximate inverse preconditioning on symmetric multiprocessor systems". In International Conference on Parallel and Distributed Processing Techniques and Applications, pages 168–178, 2004
- George A. Gravvanis and Konstantinos M. Giannoutakis. "Parallel approximate finite element inverse preconditioning on distributed systems". In Third International Symposium on Parallel and Distributed Computing/Third International Workshop on Algorithms, Models and Tools for Parallel Computing on Heterogeneous Networks, pages 277–283, July 2004
2003
- George A. Gravvanis, Agapios N. Platis, Konstantinos M. Giannoutakis, John B. Violentis, and Elias A. Lipitakis. "Performability evaluation of multitasking and multiprocessor systems by explicit approximate inverses". In International Conference on Parallel and Distributed Processing Techniques and Applications, pages 1324–1331, 2003
2002
- George A. Gravvanis, Agapios N. Platis, John B.Violentis, and Konstantinos M. Giannoutakis. "Performability evaluation of a replicated database system by explicit approximate inverses". In Proceedings of the International Conference on Parallel and Distributed Processing Techniques and Applications-Volume 1, pages 114–120. CSREA Press, 2002
- Konstantinos M. Giannoutakis and George A. Gravvanis. "A normalized explicit preconditioned conjugate gradient method for solving sparse non-linear systems". In Proceedings of the International Conference on Parallel and Distributed Processing Techniques and Applications-Volume 1, pages 107–113. CSREA Press, 2002
