Discover the world’s highly cited researchers through the AD Scientific Index 2025 Citation Rankings.
These rankings evaluate scientists based on their total and recent citation counts, capturing the breadth and real-time currency of academic recognition. Citation data reveals how widely a scholar’s work is referenced, applied, and extended across diverse disciplines. The rankings are routinely updated to reflect ongoing citation growth, while eliminating distortions from excessive co-authorship and institutional inflation. Premium tools provide access to detailed citation dynamics, unethical citation behavior detection, and field-normalized benchmarking.
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 1

Economic
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
34,787
21,516
0.619
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 2

tourism
hospitality
services
marketing
digital technologie
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
26,694
17,618
0.660
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 3

Cryptography
Computer Security
Privacy
Blockchain
Cybercrim
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,209
7,563
0.821
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 4

Supply Chain Management
Smart logistics
Blockchain
IoT
Humanitarian Logistic
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,778
5,363
0.928
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 5

Artificial Intelligence / Deep Learning
Software Technology
AI for Education
Human-AI Trus
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,976
5,128
0.514
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 6

Cybersecurity
Security
Information Security
Privacy
Data Protectio
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,843
4,848
0.409
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 7

Technoeconomics of Energy System
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,916
4,510
0.762
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 8

Learning Technologies
Technology Enhanced Learning
e-Learning
Adaptive Learning
Learning Analytic
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,211
4,239
0.415
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 9

Biomedical Informatics
Artificial Intelligence
Image Processing and Computer Vision
Multimedia
Sound Processin
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,158
4,225
0.416
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* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 10

Distributed Computing
Data Management & Analytics
Io
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,410
3,427
0.633
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 11

Wireless Communications Theory
THz Communications
Wireless Security
Communications for Biomedica
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,963
3,405
0.859
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 12

Informatics
Programming
Software
Application
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,415
3,284
0.744
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 13

Wireless Systems
MIMO
Ultra Dense Networks
THz Communications
Reconfigurable Intelligent Surface
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,321
3,080
0.487
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 14

Computer Network
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,538
3,150
0.330
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 15

Data Science
Machine Learning
Spatial Databases
Mobility Data Scienc
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
15,101
3,060
0.203
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 16

Knowledge management
Decision support
Group support systems
Recommender system
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,648
3,029
0.536
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 17

Telecommunications
Networks
Services
IC
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,130
2,540
0.356
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 18

Data mining
Database managemen
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,143
2,470
0.402
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 19

Energy Economics
Energy Policy
Energy Markets
Climate Polic
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,757
2,273
0.605
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 20

Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,804
2,243
0.330
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 21

Security
Privacy
Cryptography
Critical Infrastructures
Critical Infrastructure Protectio
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,839
2,081
0.542
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 22

Data Mining
machine learning
recommender systems
distributed systems
data privac
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,337
2,047
0.246
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 23

Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,624
2,008
0.434
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 24

Computational Intelligence
Pattern Recognition
Artificial Intelligence
Signal Processing
Image Analysi
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,510
2,015
0.447
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 25

Wireless and Satellite Communication
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,104
1,865
0.454
Nicholas Apergis
University of Piraeus
Piraeus, Greece
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
34,787
21,516
0.619
Marianna Sigala
University of Piraeus
Piraeus, Greece
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
26,694
17,618
0.660
tourism
hospitality
services
marketing
digital technologie
Constantinos Patsakis
University of Piraeus
Piraeus, Greece
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,209
7,563
0.821
Cryptography
Computer Security
Privacy
Blockchain
Cybercrim
Thomas K Dasaklis
University of Piraeus
Piraeus, Greece
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,778
5,363
0.928
Supply Chain Management
Smart logistics
Blockchain
IoT
Humanitarian Logistic
Maria Virvou
University of Piraeus
Piraeus, Greece
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,976
5,128
0.514
Artificial Intelligence / Deep Learning
Software Technology
AI for Education
Human-AI Trus
Stefanos Gritzalis
University of Piraeus
Piraeus, Greece
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,843
4,848
0.409
Cybersecurity
Security
Information Security
Privacy
Data Protectio
Alexandros Flamos
University of Piraeus
Piraeus, Greece
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,916
4,510
0.762
Technoeconomics of Energy System
Demetrios Sampson
University of Piraeus
Piraeus, Greece
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,211
4,239
0.415
Learning Technologies
Technology Enhanced Learning
e-Learning
Adaptive Learning
Learning Analytic
Ilias Maglogiannis
University of Piraeus
Piraeus, Greece
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,158
4,225
0.416
Biomedical Informatics
Artificial Intelligence
Image Processing and Computer Vision
Multimedia
Sound Processin
Dimosthenis Kyriazis
University of Piraeus
Piraeus, Greece
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,410
3,427
0.633
Distributed Computing
Data Management & Analytics
Io
Smart Institutional Plan
Powerful Insights + Smart Membership = Institutional Success
Unlock 360° Real-Time Institutional Analysis to identify your institution’s strengths and areas for improvement.
Alexandros-Apostolos A Boulogeorgos
University of Piraeus
Piraeus, Greece
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,963
3,405
0.859
Wireless Communications Theory
THz Communications
Wireless Security
Communications for Biomedica
Timmy Alepis
University of Piraeus
Piraeus, Greece
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,415
3,284
0.744
Angeliki Alexiou
University of Piraeus
Piraeus, Greece
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,321
3,080
0.487
Wireless Systems
MIMO
Ultra Dense Networks
THz Communications
Reconfigurable Intelligent Surface
Christos Douligeris
University of Piraeus
Piraeus, Greece
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,538
3,150
0.330
Yannis Theodoridis
University of Piraeus
Piraeus, Greece
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
15,101
3,060
0.203
Data Science
Machine Learning
Spatial Databases
Mobility Data Scienc
Dimitris Apostolou
University of Piraeus
Piraeus, Greece
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,648
3,029
0.536
Knowledge management
Decision support
Group support systems
Recommender system
Panagiotis Demestichas
University of Piraeus
Piraeus, Greece
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,130
2,540
0.356
Telecommunications
Networks
Services
IC
Nikos Pelekis
University of Piraeus
Piraeus, Greece
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,143
2,470
0.402
Data mining
Database managemen
Athanasios Dagoumas
University of Piraeus
Piraeus, Greece
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,757
2,273
0.605
Energy Economics
Energy Policy
Energy Markets
Climate Polic
Dimitrios D Vergados
University of Piraeus
Piraeus, Greece
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,804
2,243
0.330
Panayiotis Kotzanikolaou
University of Piraeus
Piraeus, Greece
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,839
2,081
0.542
Security
Privacy
Cryptography
Critical Infrastructures
Critical Infrastructure Protectio
M Halkidi|Maria Halkidi
University of Piraeus
Piraeus, Greece
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,337
2,047
0.246
Data Mining
machine learning
recommender systems
distributed systems
data privac
Charalampos Konstantopoulos
University of Piraeus
Piraeus, Greece
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,624
2,008
0.434
George A Tsihrintzis
University of Piraeus
Piraeus, Greece
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,510
2,015
0.447
Computational Intelligence
Pattern Recognition
Artificial Intelligence
Signal Processing
Image Analysi
Athanasios G Kanatas
University of Piraeus
Piraeus, Greece
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,104
1,865
0.454
Wireless and Satellite Communication