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1

Investigating student understanding of operational-amplifier circuits

Papanikolaou, Christos P., Tombras, George S., Van De Bogart, Kevin L., Stetzer, MacKenzie R.

Journal:

American Journal of Physics

Year:

2015

Language:

english

File:

PDF, 4.23 MB

english, 2015

2

Dual-hop relaying communications over generalized-K (KG) fading channels

Kostas P. Peppas, Christos K. Datsikas, Hector E. Nistazakis, George S. Tombras

Journal:

Journal of the Franklin Institute

Year:

2010

Language:

english

File:

PDF, 469 KB

english, 2010

3

Capacity Analysis of Dual Amplify-and-Forward Relayed Free-Space Optical Communication Systems Over Turbulence Channels With Pointing Errors

Peppas, Kostas P., Stassinakis, Argyris N., Nistazakis, Hector E., Tombras, George S.

Journal:

Journal of Optical Communications and Networking

Year:

2013

Language:

english

File:

PDF, 831 KB

english, 2013

4

[IEEE 2007 IEEE 18th International Symposium on Personal, Indoor and Mobile Radio Communications - Athens, Greece (2007.09.3-2007.09.7)] 2007 IEEE 18th International Symposium on Personal, Indoor and Mobile Radio Communications - Dual-Hop Relaying Networks over Nakagami-M Fading Channels

Datsikas, Christos K., Tombras, George S., Sagias, Nikos C., Lazarakis, Fotis I., Alexandropoulos, George C., Alexandridis, Antonis A., Dangakis, Kostas P.

Year:

2007

Language:

english

File:

PDF, 204 KB

english, 2007

5

A Novel Chaotic System without Equilibrium: Dynamics, Synchronization, and Circuit Realization

Azar, Ahmad Taher, Volos, Christos, Gerodimos, Nikolaos A., Tombras, George S., Pham, Viet-Thanh, Radwan, Ahmed G., Vaidyanathan, Sundarapandian, Ouannas, Adel, Munoz-Pacheco, Jesus M.

Journal:

Year:

2017

Language:

english

File:

PDF, 4.53 MB

english, 2017

6

DF Relayed Subcarrier FSO Links over Malaga Turbulence Channels with Phase Noise and Non-Zero Boresight Pointing Errors

Varotsos, George, Nistazakis, Hector, Gappmair, Wilfried, Sandalidis, Harilaos, Tombras, George

Journal:

Applied Sciences

Year:

2018

Language:

english

File:

PDF, 2.84 MB

english, 2018

7

Block error rate performance of OOK FSO links over gamma-gamma turbulence channels with generalized nonzero boresight pointing errors

Nistazakis, Hector, Ninos, M., Sandalidis, Harilaos, Stassinakis, A., Tombras, George

Journal:

IET Optoelectronics

Year:

2018

Language:

english

File:

PDF, 807 KB

english, 2018

8

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

Manousou, Dimitra K., Stassinakis, Argyris N., Syskakis, Emmanuel, Nistazakis, Hector E., Gardelis, Spiros, Tombras, George S.

Journal:

Year:

2019

Language:

english

File:

PDF, 3.18 MB

english, 2019

9

Average channel capacity for generalized-selection combining RAKE receivers

Nikos C. Sagias, Panagiotis Varzakas, George S. Tombras, George K. Karagiannidis

Journal:

Transactions on Emerging Telecommunications Technologies

Year:

2004

Language:

english

File:

PDF, 72 KB

english, 2004

10

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

Journal:

Transactions on Emerging Telecommunications Technologies

Year:

2005

Language:

english

File:

PDF, 95 KB

english, 2005

11

Error rate performance analysis of dual-hop relaying transmissions over generalized-K fading channels

Christos K. Datsikas, Kostas P. Peppas, Fotis I. Lazarakis, George S. Tombras

Journal:

AEU - International Journal of Electronics and Communications

Year:

2010

Language:

english

File:

PDF, 655 KB

english, 2010

12

On the cascaded Weibull fading channel model

Nikos C. Sagias, George S. Tombras

Journal:

Journal of the Franklin Institute

Year:

2007

Language:

english

File:

PDF, 497 KB

english, 2007

13

Symbol error probability of decode and forward cooperative diversity in Nakagami-m fading channels

Diomidis S. Michalopoulos, George K. Karagiannidis, George S. Tombras

Journal:

Journal of the Franklin Institute

Year:

2008

Language:

english

File:

PDF, 190 KB

english, 2008

14

Higher Order Capacity Statistics of Diversity Receivers

Nikos C. Sagias, Fotis I. Lazarakis, Antonis A. Alexandridis, Kostas P. Dangakis, George S. Tombras

Journal:

Wireless Personal Communications

Year:

2011

Language:

english

File:

PDF, 649 KB

english, 2011

15

Serial relaying communications over generalized-gamma fading channels

Christos K. Datsikas, Kostas P. Peppas, Nikos C. Sagias, George S. Tombras

Journal:

Wireless Communications and Mobile Computing

Year:

2012

Language:

english

File:

PDF, 437 KB

english, 2012

16

On the use of wavelength and time diversity in optical wireless communication systems over gamma–gamma turbulence channels

Hector E. Nistazakis, George S. Tombras

Journal:

Optics & Laser Technology

Year:

2012

Language:

english

File:

PDF, 895 KB

english, 2012

17

Capacity estimation of optical wireless communication systems over moderate to strong turbulence channels

Nistazakis, Hector E., Tombras, George S., Tsigopoulos, Antreas D., Karagianni, Evangelia A., Fafalios, Michael E.

Journal:

Journal of Communications and Networks

Year:

2009

Language:

english

File:

PDF, 1.09 MB

english, 2009

18

[IEEE 2010 14th Panhellenic Conference on Informatics (PCI) - Tripoli, Greece (2010.09.10-2010.09.12)] 2010 14th Panhellenic Conference on Informatics - Bit Error and Outage Probability of Serial Relaying Communication Systems

Datsikas, Christos K., Peppas, Kostas P., Sagias, Nikos C., Tselikas, Nikolaos D., Tombras, George S.

Year:

2010

Language:

english

File:

PDF, 327 KB

english, 2010

19

1-Bit delayed encoding improves continuously variable slope delta modulator performance

TOMBRAS, GEORGE S.

Journal:

International Journal of Electronics

Year:

1992

Language:

english

File:

PDF, 253 KB

english, 1992

20

[IEEE IEEE GLOBECOM 2008 - 2008 IEEE Global Telecommunications Conference - New Orleans, LA, USA (2008.11.30-2008.12.4)] IEEE GLOBECOM 2008 - 2008 IEEE Global Telecommunications Conference - Error Rate Performance of Multilevel Signals with Coherent Detection

Sagias, Nikos C., Mallik, Ranjan K., Tombras, George S.

Year:

2008

Language:

english

File:

PDF, 206 KB

english, 2008

21

[IEEE 2009 Computation World: Future Computing, Service Computation, Cognitive, Adaptive, Content, Patterns (COMPUTATIONWORLD) - Athens, Greece (2009.11.15-2009.11.20)] 2009 Computation World: Future Computing, Service Computation, Cognitive, Adaptive, Content, Patterns - A Framework for Dynamic Car and Taxi Pools with the Use of Positioning Systems

Lalos, Petros, Korres, Andreas, Datsikas, Christos K., Tombras, George S., Peppas, Kostas

Year:

2009

Language:

english

File:

PDF, 878 KB

english, 2009

22

Comparative performance study of one or multiple receivers schemes for FSO links over gamma–gamma turbulence channels

Stassinakis, Argyris N., Nistazakis, Hector E., Tombras, George S.

Journal:

Journal of Modern Optics

Year:

2012

Language:

english

File:

PDF, 390 KB

english, 2012

23

[AIP INTERNATIONAL ELECTRONIC CONFERENCE ON COMPUTER SCIENCE - (28 June–8 July 2007)] AIP Conference Proceedings - Bayesian and Frequentist Estimation of the Average Capacity of Log Normal Wireless Optical Channels

Katsis, A., Nistazakis, H. E., Tombras, G. S., Simos, Theodore E., Psihoyios, George

Year:

2008

Language:

english

File:

PDF, 378 KB

english, 2008

24

Average Capacity of Optical Wireless Communication Systems Over I-K Atmospheric Turbulence Channels

Peppas, Kostas P., Stassinakis, Argyris N., Topalis, George K., Nistazakis, Hector E., Tombras, George S.

Journal:

Journal of Optical Communications and Networking

Year:

2012

Language:

english

File:

PDF, 290 KB

english, 2012

25

Performance of quadrature amplitude modulation orthogonal frequency division multiplexing-based free space optical links with non-linear clipping effect over gamma–gamma modelled turbulence channels

Stassinakis, A.N., Tombras, George S., Sinanović, Sinan, Nistazakis, Hector E., Popoola, Wasiu O.

Journal:

IET Optoelectronics

Year:

2015

Language:

english

File:

PDF, 410 KB

english, 2015

26

Hyperchaotic Attractor in a Novel Hyperjerk System with Two Nonlinearities

Daltzis, Peter, Vaidyanathan, Sundarapandian, Pham, Viet–Thanh, Volos, Christos, Nistazakis, Ektoras, Tombras, George

Journal:

Circuits, Systems, and Signal Processing

Year:

2017

Language:

english

File:

PDF, 2.07 MB

english, 2017

27

Analysis, Synchronization and Circuit Design of a 4D Hyperchaotic Hyperjerk System

Daltzis, Petros, Volos, Christos, Nistazakis, Hector, Tsigopoulos, Andreas, Tombras, George

Journal:

Year:

2018

Language:

english

File:

PDF, 9.49 MB

english, 2018

28

An Accurate Computational Tool for Performance Estimation of FSO Communication Links over Weak to Strong Atmospheric Turbulent Channels

Katsilieris, Theodore D., Latsas, George P., Nistazakis, Hector E., Tombras, George S.

Journal:

Year:

2017

Language:

english

File:

PDF, 1.18 MB

english, 2017

29

CDMA RoFSO Links with Nonzero Boresight Pointing Errors over M Turbulence Channels

Ninos, Michalis P., Nistazakis, Hector E., Sandalidis, Harilaos, Tombras, George S.

Journal:

IEEE Photonics Journal

Year:

2018

Language:

english

File:

PDF, 581 KB

english, 2018

30

Elimination of Idle Tones by a 2-Bit Adaptive Sigma-Delta Modulation System

Prosalentis, Evangelos, Tombras, George S.

Journal:

Year:

2009

Language:

english

File:

PDF, 665 KB

english, 2009

31

An Inverse Pheromone Approach in a Chaotic Mobile Robot’s Path Planning Based on a Modified Logistic Map

Petavratzis, Eleftherios K., Volos, Christos K., Moysis, Lazaros, Stouboulos, Ioannis N., Nistazakis, Hector E., Tombras, George S., Valavanis, Kimon P.

Journal:

Year:

2019

File:

PDF, 6.20 MB

2019

32

Time Jitter, Turbulence and Chromatic Dispersion in Underwater Optical Wireless Links

Roumelas, George D., Nistazakis, Hector E., Stassinakis, Argyris N., Varotsos, George K., Tsigopoulos, Andreas D., Tombras, George S.

Journal:

Year:

2019

File:

PDF, 1.24 MB

2019

33

[IEEE 2020 9th International Conference on Modern Circuits and Systems Technologies (MOCAST) - Bremen, Germany (2020.9.7-2020.9.9)] 2020 9th International Conference on Modern Circuits and Systems Technologies (MOCAST) - A Chaotic Circuit with Bi-Color LED as a Nonlinear Element

Giakoumis, Aggelos, Androutsos, Nikolaos A., Volos, Christos K., Moysis, Lazaros, Nistazakis, Hector E., Tombras, George S.

Year:

2020

File:

PDF, 671 KB

2020

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