Erol Gelenbe

Erol Gelenbe
NeuralDream · CC BY 3.0 · source
Name	Erol Gelenbe
Birth date	12 April 1945
Birth place	Istanbul, Turkey
Death date	28 December 2017
Death place	Paris, France
Nationality	Turkish-born French
Fields	Computer science, Electrical engineering, Applied mathematics
Institutions	Bilkent University; Imperial College London; Institut Polytechnique de Paris; Ecole Nationale Supérieure des Télécommunications
Alma mater	Middle East Technical University; Polytechnic University of New York; University of Paris
Known for	Random neural networks; G-networks; performance evaluation of computer systems; stochastic automata networks

Erol Gelenbe was a Turkish-born computer scientist and electrical engineer noted for foundational work in stochastic modeling, performance evaluation, and cognitive packet networks. He held professorships and leadership roles in European and Turkish institutions and made lasting contributions to queuing theory, neural computation, and network architectures. His research influenced telecommunications, computer systems, and applied probability across international collaborations.

Early life and education

Gelenbe was born in Istanbul and raised amid postwar Turkey in a milieu connected to Istanbul University and Galatasaray High School traditions. He studied at Middle East Technical University where he earned an undergraduate degree, later moving to the United States for graduate studies at the Polytechnic Institute of New York University (then Polytechnic University of New York). He completed doctoral research influenced by scholars associated with Columbia University, New York University, and the Courant Institute of Mathematical Sciences before pursuing postdoctoral and habilitation work linked to institutions such as the University of Paris and École Nationale Supérieure des Télécommunications.

Academic career and positions

Gelenbe’s early academic appointments included roles at the University of California, Berkeley research networks and collaborations with Bell Labs researchers. He became a professor at Imperial College London where he led the Communications and Performance Research Group and later served as Chair in Computer Systems and Software. He held visiting and honorary positions at Ecole Polytechnique, École Normale Supérieure, Technische Universität München, Politecnico di Milano, University of Cambridge, Massachusetts Institute of Technology, Stanford University, University of Michigan, and Princeton University. He founded and directed research centers at Bilkent University and was associated with the French National Centre for Scientific Research (CNRS) through partnerships with Télécom ParisTech and Institut Polytechnique de Paris.

Research contributions and theories

Gelenbe introduced the Random Neural Network model, advancing models linked to Hawkes process ideas and extensions of Jackson network theory, and developed the class of G-networks integrating negative customers and signals into queueing frameworks. He contributed to performance evaluation methods that bridged stochastic processes, Markov chains, and analytical techniques used in queueing theory and stochastic Petri nets. His work on cognitive packet networks and adaptive routing influenced architectures related to Internet Protocol, Ad hoc networks, wireless sensor networks, and optical networks. He proposed energy-aware computing and developed models applied to cyber-physical systems, autonomous vehicles, robotics, and neuroscience interfaces, connecting to topics explored at INRIA, Siemens, Nokia, Ericsson, and Alcatel-Lucent. His contributions intersected with research on machine learning algorithms in relation to Boltzmann machine concepts, Hopfield network dynamics, and reinforcement learning paradigms utilized in Google and DeepMind research agendas.

Awards and honors

Gelenbe received numerous recognitions including fellowships and prizes from institutions such as the Royal Society, IEEE, The Institution of Engineering and Technology, Academy of Sciences and Arts of Turkey, and the French Academy of Technologies. He held IEEE Fellowship and was awarded medals and honorary degrees by universities including Istanbul Technical University, Bilkent University, and Imperial College London. He was a member or corresponding member of academies and societies including the Academia Europaea, Royal Academy of Engineering, Turkish Academy of Sciences, and received leadership awards from organizations such as the International Federation for Information Processing (IFIP) and the Association for Computing Machinery (ACM) Europe Council. National honors included decorations connected to the governments of France and Turkey and awards presented at venues like the Institute of Electrical and Electronics Engineers conferences and European Conference on Computer Systems meetings.

Selected publications and books

Gelenbe authored and edited numerous books and articles across publishers and journals linked to Springer Science+Business Media, Elsevier, ACM Press, and IEEE Xplore. Key monographs and edited volumes include works on Random Neural Networks, G-networks, and performance evaluation that appeared in series associated with Lecture Notes in Computer Science and Lecture Notes in Mathematics. He published influential papers in journals such as Proceedings of the IEEE, IEEE/ACM Transactions on Networking, Performance Evaluation, and Journal of Applied Probability. His collaborative publications involved coauthors from Imperial College London, Bilkent University, Télécom ParisTech, University of California, Columbia University, École Polytechnique, Politecnico di Torino, and industrial partners including BT Group and Thales.

Personal life and legacy

Gelenbe maintained ties to cultural and academic circles spanning Istanbul, Paris, London, and Ankara. He supervised generations of researchers who went on to hold positions at Google, Microsoft Research, IBM Research, Bell Labs, and major universities worldwide. His theoretical frameworks continue to inform research at institutions such as CNRS, INRIA, Imperial College London, Bilkent University, and industrial labs including Ericsson Research and Nokia Bell Labs. His legacy endures through named lectures, doctoral theses, and research groups that advance methods in stochastic modeling, network design, and adaptive computing across Europe, North America, and Asia.

Category:Turkish computer scientists Category:1945 births Category:2017 deaths