Development of a conformance test system for ERMES receivers. - Kostas Dangakis; George S. Tombras; Antonis M. Paschalis; A. C. Papavramidis; Panos Kostarakis (PIMRC, 1992)

A conformance test system for DECT physical layer. - A. C. Papavramidis; Antonis M. Paschalis; O. Myrtue; Kostas Dangakis; George S. Tombras; Panos Kostarakis (PIMRC, 1992)

A point-to-point mobile radio prediction model based on effective height estimation for the region of Athens. - Fotis I. Lazarakis; Kostas Dangakis; Antonis A. Alexandridis; George S. Tombras (PIMRC, 1994)

Field measurements and coverage prediction model evaluation based on a geographical information system. - Fotis I. Lazarakis; Kostas Dangakis; Antonis A. Alexandridis; George S. Tombras (PIMRC, 1994)

System design requirements for mobile communications open to conformance testing. - A. C. Papavramidis; George S. Tombras (PIMRC, 1994)

Generalized two-port performance evaluation. - Stelios M. Potirakis; Giorgos E. Alexakis; George S. Tombras (ICECS, 1996)

An alternative two-port feedback analysis approach. - Stelios M. Potirakis; Giorgos E. Alexakis; George S. Tombras (ICECS, 1996)

Evaluation of a terrain-based point-to-point propagation model in the 900 MHz band. - F. Lazarkis; A. A. Alexandris; Kostas Dangakis; Panos Kostarakis; George S. Tombras (Int. J. Commun. Syst., 1997)

Spectral efficiency of direct-sequence code-division multiple-access in cellular mobile radio. - Panagiotis Varzakas; George S. Tombras (Int. J. Commun. Syst., 1997)

Spectral efficiency for FDMA and DS-CDMA in cellular systems. - Panagiotis Varzakas; George S. Tombras (PIMRC, 1998)

Spectral efficiency for a hybrid DS/FH code-division multiple-access system in cellular mobile radio. - Panagiotis Varzakas; George S. Tombras (IEEE Trans. Veh. Technol., 2001)

Dual selection diversity over correlated Weibull fading channels. - Nikos C. Sagias; George K. Karagiannidis; Dimitris A. Zogas; P. Takis Mathiopoulos; George S. Tombras; Stavros A. Kotsopoulos (ICC, 2004)

Second order statistics and channel spectral efficiency for selection diversity receivers in Weibull fading. - Nikos C. Sagias; George K. Karagiannidis; Dimitris A. Zogas; Panayiotis Takis Mathiopoulos; George S. Tombras; Fotini-Niovi Pavlidou (PIMRC, 2004)

Average channel capacity for generalized-selection combining RAKE receivers. - Nikos C. Sagias; Panagiotis Varzakas; George S. Tombras; George K. Karagiannidis (Eur. Trans. Telecommun., 2004)

Channel capacity and second-order statistics in Weibull fading. - Nikos C. Sagias; Dimitris A. Zogas; George K. Karagiannidis; George S. Tombras (IEEE Commun. Lett., 2004)

On the detection of acoustic and electromagnetic signals before fracture of dielectric crystalline materials. - Dimitrios Ninos; George S. Tombras; Clairi Mavromatou; Vassilios Hadjicontis (IEEE Geosci. Remote. Sens. Lett., 2004)

Performance analysis of dual selection diversity in correlated Weibull fading channels. - Nikos C. Sagias; George K. Karagiannidis; Dimitris A. Zogas; P. Takis Mathiopoulos; George S. Tombras (IEEE Trans. Commun., 2004)

Communication Theory Average output SNR of equal-gain diversity receivers over correlative Weibull fading channels. - Dimitris A. Zogas; Nikos C. Sagias; George S. Tombras; George K. Karagiannidis (Eur. Trans. Telecommun., 2005)

New results for the Shannon channel capacity in generalized fading channels. - Nikos C. Sagias; George S. Tombras; George K. Karagiannidis (IEEE Commun. Lett., 2005)

Spectral efficiency of a cellular MC/DS-CDMA system in Rayleigh fading. - Panagiotis Varzakas; George S. Tombras (Int. J. Commun. Syst., 2005)

Spectral efficiency for selection combining RAKE receivers over Weibull fading channels. - Nikos C. Sagias; Panagiotis Varzakas; George S. Tombras; George K. Karagiannidis (J. Frankl. Inst., 2005)

Memory effects in EM emission during uniaxial deformation of dielectric Crystalline materials. - Vassilios Hadjicontis; George S. Tombras; Dimitrios Ninos; Clairi Mavromatou (IEEE Geosci. Remote. Sens. Lett., 2005)

Equal-gain and maximal-ratio combining over nonidentical Weibull fading channels. - George K. Karagiannidis; Dimitris A. Zogas; Nikos C. Sagias; Stavros A. Kotsopoulos; George S. Tombras (IEEE Trans. Wirel. Commun., 2005)

Average output SINR of equal-gain diversity in correlated Nakagami-m fading with cochannel interference. - Nikos C. Sagias; George K. Karagiannidis; Dimitris A. Zogas; George S. Tombras; Stavros A. Kotsopoulos (IEEE Trans. Wirel. Commun., 2005)

An approach for efficient design of digital amplifiers. - Nikolaos Vlassopoulos; Dionysios I. Reisis; George Lentaris; George S. Tombras; Evangelos A. Prosalentis; N. Ritas; Konstantinos S. Tsakalis (ISCAS, 2006)

Spectral efficiency of a single-cell multi-carrier DS-CDMA system in Rayleigh fading. - Panagiotis Varzakas; George S. Tombras (J. Frankl. Inst., 2006)

Dual-Hop Relaying Networks over Nakagami-M Fading Channels. - Christos Datsikas; George S. Tombras; Nikos C. Sagias; Fotis I. Lazarakis; George C. Alexandropoulos; Antonis A. Alexandridis; Kostas Dangakis (PIMRC, 2007)

A 2-bit Adaptive Delta Modulation System with Improved Performance. - Evangelos A. Prosalentis; George S. Tombras (EURASIP J. Adv. Signal Process., 2007)

On the cascaded Weibull fading channel model. - Nikos C. Sagias; George S. Tombras (J. Frankl. Inst., 2007)

Description of a 2-Bit Adaptive Sigma-Delta Modulation System with Minimized Idle Tones. - Evangelos A. Prosalentis; George S. Tombras (EURASIP J. Adv. Signal Process., 2008)

Symbol error probability of decode and forward cooperative diversity in Nakagami-m fading channels. - Diomidis S. Michalopoulos; George K. Karagiannidis; George S. Tombras (J. Frankl. Inst., 2008)

Introducing JOUNBO: A New Advanced Online Journal and Newspaper Browser. - Petros Lalos; George S. Tombras (J. Multim., 2008)

Outage Analysis of Decode-and-Forward Relaying Over Nakagami- Fading Channels. - Nikos C. Sagias; Fotis I. Lazarakis; George S. Tombras; Christos Datsikas (IEEE Signal Process. Lett., 2008)

Performance analysis of free-space optical communication systems over atmospheric turbulence channels. - Hector E. Nistazakis; Theodoros A. Tsiftsis; George S. Tombras (IET Commun., 2009)

Capacity estimation of optical wireless communication systems over moderate to strong turbulence channels. - Hector E. Nistazakis; George S. Tombras; Antreas D. Tsigopoulos; Evangelia A. Karagianni; Michael E. Fafalios (J. Commun. Networks, 2009)

Bayesian and frequentist estimation of the performance of free space optical channels under weak turbulence conditions. - Athanassios Katsis; Hector E. Nistazakis; George S. Tombras (J. Frankl. Inst., 2009)

Bit Error and Outage Probability of Serial Relaying Communication Systems. - Christos Datsikas; Kostas P. Peppas; Nikos C. Sagias; Nikolaos D. Tselikas; George S. Tombras (Panhellenic Conference on Informatics, 2010)

Dual-hop transmissions with fixed-gain relays over Generalized-Gamma fading channels - Kostas P. Peppas; A. Mansour; George S. Tombras (CoRR, 2010)

Dual-hop relaying communications over generalized-K (KG) fading channels. - Kostas P. Peppas; Christos Datsikas; Hector E. Nistazakis; George S. Tombras (J. Frankl. Inst., 2010)

Serial Free-Space Optical Relaying Communications Over Gamma-Gamma Atmospheric Turbulence Channels. - Christos Datsikas; Kostas P. Peppas; Nikos C. Sagias; George S. Tombras (JOCN, 2010)

Error Rate Performance of Multilevel Signals with Coherent Detection. - Nikos C. Sagias; Ranjan K. Mallik; George S. Tombras (IEEE Trans. Commun., 2010)

Dual-hop multi-input multi-output relay systems over spatially correlated Nakagami-m fading channels. - Kostas Peppas 001; Christos Datsikas; Nikos C. Sagias; George S. Tombras (IET Commun., 2011)

Higher Order Capacity Statistics of Diversity Receivers. - Nikos C. Sagias; Fotis I. Lazarakis; Antonis Alexandridis 001; Kostas Dangakis; George S. Tombras (Wirel. Pers. Commun., 2011)

Average Capacity of Optical Wireless Communication Systems Over I-K Atmospheric Turbulence Channels. - Kostas P. Peppas; Argyris N. Stassinakis; George K. Topalis; Hector E. Nistazakis; George S. Tombras (JOCN, 2012)

Serial relaying communications over generalized-gamma fading channels. - Christos Datsikas; Kostas Peppas 001; Nikos C. Sagias; George S. Tombras (Wirel. Commun. Mob. Comput., 2012)

Capacity Analysis of Dual Amplify-and-Forward Relayed Free-Space Optical Communication Systems Over Turbulence Channels With Pointing Errors. - Kostas P. Peppas; Argyris N. Stassinakis; Hector E. Nistazakis; George S. Tombras (JOCN, 2013)

Implementation of a Laboratory-Based Educational Tool for Teaching Nonlinear Circuits and Chaos. - Aggelos Giakoumis; Christos K. Volos; Ioannis N. Stouboulos; Ioannis M. Kyprianidis; Hector E. Nistazakis; George S. Tombras (Advances and Applications in Chaotic Systems, 2016)

Reengineering engineering education: Developing a constructively aligned learning-by-doing pedagogical model for 21st century education. - Ghassan Frache; Hector E. Nistazakis; George S. Tombras (EDUCON, 2017)

PSK OFDM optical wireless communication systems with receiver's diversity over gamma-gamma turbulence channels and spatial jitter. - Michalis P. Ninos; Hector E. Nistazakis; George P. Latsas; George S. Tombras; Nikos Konofaos (MOCAST, 2017)

Block error rate estimation for wireless optical communication links over strong turbulence channels with pointing errors. - Michalis P. Ninos; Hector E. Nistazakis; A. N. Stassinakis; George K. Varotsos; George S. Tombras; Christos K. Volos (MOCAST, 2017)

DF relayed FSO communication systems with time dispersion over Gamma Gamma turbulence and misalignment. - George K. Varotsos; Hector E. Nistazakis; Michalis P. Ninos; George S. Tombras; Antreas D. Tsigopoulos; Christos K. Volos (MOCAST, 2017)

Average error performance in Subcarrier PSK FSO links over weak turbulence channels with spatial jitter and phase noise. - George K. Varotsos; Hector E. Nistazakis; George S. Tombras; Wilfried Gappmair (MOCAST, 2017)

A Novel Chaotic System without Equilibrium: Dynamics, Synchronization, and Circuit Realization. - Ahmad Taher Azar; Christos K. Volos; Nikolaos A. Gerodimos; George S. Tombras; Viet-Thanh Pham; Ahmed G. Radwan; Sundarapandian Vaidyanathan; Adel Ouannas; Jesús M. Muñoz-Pacheco (Complex., 2017)

An Accurate Computational Tool for Performance Estimation of FSO Communication Links over Weak to Strong Atmospheric Turbulent Channels. - Theodore D. Katsilieris; George P. Latsas; Hector E. Nistazakis; George S. Tombras (Comput., 2017)

OFDM RoFSO Links with Relays Over Turbulence Channels and Nonzero Boresight Pointing Errors. - George K. Varotsos; Hector E. Nistazakis; George S. Tombras (J. Commun., 2017)

Estimation of the influence of Vanadium dioxide optical filters at the performance of visible light communication systems. - Dimitra K. Manousou; Argyris N. Stassinakis; Emmanuel Syskakis; Hector E. Nistazakis; George S. Tombras; Christos K. Volos; Antreas D. Tsigopoulos (MOCAST, 2018)

CDMA radio on FSO links over gamma turbulence channels with nonzero boresight pointing errors. - Michalis P. Ninos; Hector E. Nistazakis; A. N. Stassinakis; George S. Tombras; Vasilis Christofilakis; Antreas D. Tsigopoulos (MOCAST, 2018)

Robot's path planning based on emulated finite resistive grids. - Eleftherios K. Petavratzis; Christos K. Volos; Ioannis N. Stouboulos; Ioannis M. Kyprianidis; Hector E. Nistazakis; George S. Tombras (MOCAST, 2018)

Outage performance of mixed, parallel and serial DF relayed FSO links over weak turbulence channels with nonzero boresight pointing errors. - George K. Varotsos; Hector E. Nistazakis; A. N. Stassinakis; George S. Tombras; Vasilis Christofilakis; Christos K. Volos (MOCAST, 2018)

Analysis, Synchronization and Circuit Design of a 4D Hyperchaotic Hyperjerk System. - Peter Daltzis; Christos K. Volos; Hector E. Nistazakis; Antreas D. Tsigopoulos; George S. Tombras (Comput., 2018)

Hyperchaotic Attractor in a Novel Hyperjerk System with Two Nonlinearities. - Peter Daltzis; Sundarapandian Vaidyanathan; Viet-Thanh Pham; Christos K. Volos; Hector E. Nistazakis; George S. Tombras (Circuits Syst. Signal Process., 2018)

Pedagogical Approaches to 21st Century Learning: A Model to Prepare Learners for 21st Century Competencies and Skills in Engineering. - Ghassan Frache; George S. Tombras; Hector E. Nistazakis; Natoya Thompson (EDUCON, 2019)

The Use of Technology to Support Learning at Western Region Colleges, UAE. - Ghassan Frache; George S. Tombras; Kostas Stavropoulos; Gratchia Mkrttchian (EDUCON, 2019)

Research and Categorization of Conceptual Difficulties in Electricity's Concepts and Basic Laws. - Ghassan Frache; Gerasimos Vavasis; Gratchia Mkrttchian; K. Stavropoulos; Efstratios C. Kapotis; Hector E. Nistazakis; George S. Tombras (EDUCON, 2019)

DF Relayed QAM or DBPSK FSO Links with Generalized Pointing Errors Over Mixture Gamma Turbulence Channels. - Nikolaos A. Androutsos; Hector E. Nistazakis; A. N. Stassinakis; George S. Tombras; Antreas D. Tsigopoulos (MOCAST, 2019)

Triple Hybrid Terresstrial FSO/RF/MMW System with Receiver's Diversity. - George D. Roumelas; Hector E. Nistazakis; A. N. Stassinakis; George S. Tombras; Christos K. Volos (MOCAST, 2019)

On the use of Diversity in Transdermal Optical Wireless Links with Nonzero Boresight Pointing Errors for Outage Performance Estimation. - George K. Varotsos; Hector E. Nistazakis; George S. Tombras; Konstantinos Aidinis; Fadi Jaber; K. K. Mujeeb Rahman (MOCAST, 2019)

Performance of Underwater Wireless Optical Link Under Weak Turbulence and Pointing Errors Using Heterodyne QAM Technique. - Argyris N. Stassinakis; Hector E. Nistazakis; George K. Varotsos; George S. Tombras (ONDM, 2019)

Serial DF Relayed FSO Links over Mixture Gamma Turbulence Channels and Nonzero Boresight Spatial Jitter. - Nikolaos A. Androutsos; Hector E. Nistazakis; Hira Khalid; Sajid Sheikh Muhammad; George S. Tombras (Comput., 2019)

Performance Analysis of Hard-Switching Based Hybrid FSO/RF System over Turbulence Channels. - Hira Khalid; Sajid Sheikh Muhammad; Hector E. Nistazakis; George S. Tombras (Comput., 2019)

Experimental Implementation and Theoretical Investigation of a Vanadium Dioxide Optical Filter for Bit Error Rate Enhancement of Enhanced Space Shift Keying Visible Light Communication Systems. - Dimitra K. Manousou; Argyris N. Stassinakis; Emmanuel Syskakis; Hector E. Nistazakis; Spiros Gardelis; George S. Tombras (Comput., 2019)

SIMO subcarrier PSK FSO links with phase noise and non-zero boresight pointing errors over turbulence channels. - George K. Varotsos; Hector E. Nistazakis; Wilfried Gappmair; Harilaos G. Sandalidis; George S. Tombras (IET Commun., 2019)

Learning-by-Doing as an Educational Method of Conducting Experiments in Electronic Physics. - Tina P. Nantsou; Ghassan Frache; Efstratios C. Kapotis; Hector E. Nistazakis; George S. Tombras (EDUCON, 2020)

Outage Probability Estimation for a Multi-hop Terrestrial FSO Link Simplified to a Dual-hop Scheme. - Nikolaos A. Androutsos; Hector E. Nistazakis; Kyriakos N. Manganaris; George S. Tombras; Erich Leitgeb; Christos K. Volos (MOCAST, 2020)

A Chaotic Circuit with Bi-Color LED as a Nonlinear Element. - Aggelos Giakoumis; Nikolaos A. Androutsos; Christos K. Volos; Lazaros Moysis; Hector E. Nistazakis; George S. Tombras (MOCAST, 2020)

An Empirical Expression for Attenuation Coefficient Evaluation of FSO Links During Night-Time Over Maritime Area of Piraeus Port in Greece. - A. N. Stassinakis; Hector E. Nistazakis; E. V. Chatzikontis; George D. Roumelas; George S. Tombras; Antreas D. Tsigopoulos; Gratchia Mkrttchian (MOCAST, 2020)

A Lab of Hands-on STEM Experiments for Primary Teachers at CERN. - Tina P. Nantsou; Efstratios C. Kapotis; George S. Tombras (EDUCON, 2021)

Greek MOOC of Experiments with Simple Materials for Students Generates Significant Findings for Teachers and Physics Education. - Tina P. Nantsou; Efstratios C. Kapotis; George S. Tombras (EDUCON, 2021)

Block Error Performance of PAM or PPM SIMO FSO Links over Strong Turbulence Channels. - Nikolaos A. Androutsos; Hector E. Nistazakis; A. N. Stassinakis; E. V. Chatzikontis; Andreas D. Tsigopoulos; Evgenia Roditi; George S. Tombras (MOCAST, 2021)

On the BER Performance of OOK FSO Links with Receivers' Diversity and Time Jitter over Strong Turbulence Channels. - Panagiotis J. Gripeos; Hector E. Nistazakis; Evgenia Roditi; George D. Roumelas; George S. Tombras; Christos K. Volos (MOCAST, 2021)

A Physics and Engineering Lab for Primary Teachers at CERN. - Tina P. Nantsou; Efstratios C. Kapotis; George S. Tombras (Int. J. Recent Contributions Eng. Sci. IT, 2021)

Α dual-hop equivalent structure of a generalised multi-hop free-space optics network. - Nikolaos A. Androutsos; Hector E. Nistazakis; Harilaos G. Sandalidis; Erich Leitgeb; George S. Tombras (IET Commun., 2021)

Hands-on Physics Experiments for K-6 Teachers at CERN. - Tina P. Nantsou; George S. Tombras (EDUCON, 2022)

Hands-on Experiments in Electricity for Physics Teachers and Students. - Tina P. Nantsou; George S. Tombras (EDUCON, 2022)

STEM Lab on Climate Change with Simple Hands-on Experiments. - Tina P. Nantsou; George S. Tombras (EDUCON, 2022)

Research for a Teaching Approach: An Example of Addressing the High School Students' Conceptual and Reasoning Difficulties in the Study of Direct Current Simple Electric Circuits. - Gerasimos Vavasis; Efstratios C. Kapotis; George S. Tombras (Int. J. Recent Contributions Eng. Sci. IT, 2022)

High School Students' Difficulties and their Causes due to the Electromotive Force, in the Study of Direct Current Simple Electric Circuits. - Gerasimos Vavasis; Efstratios C. Kapotis; George S. Tombras (Int. J. Recent Contributions Eng. Sci. IT, 2022)

Investigating Factors Contributing to Student Dropout in a STEM MOOC. - Tina P. Nantsou; Hector E. Nistazakis; George S. Tombras (EDUCON, 2024)

Variable Splitting and Fusing for Image Phase Retrieval. - Petros Nyfantis; Pablo Ruiz Matarán; Hector E. Nistazakis; George S. Tombras; Aggelos K. Katsaggelos (J. Imaging, 2024)

The Universe for All: Hands-On Modern Physics for STEM Educators. - Tina P. Nantsou; S. Katsanevas; Chrysa Sofianopoulou; N. Tracas; George S. Tombras; Andromachi Tsirou (EDUCON, 2025)