# Research

I am interested in developing stochastic models and techniques for better understanding and engineering of communication networks, computer systems, and the smart grid. On the practical side, I am interested in bufferbloat, resource allocation, and randomized algorithms for large systems.

### Publications in Conferences

Performance Modelling and Analysis of Unreliable Links with Retransmissions using Network Calculus, H. Wang, J. Schmitt, and F. Ciucu, International Teletraffic Congress (ITC-25) 2013

A Stochastic Network Calculus with Martingales, F. Ciucu, F. Poloczek, and J. Schmitt, ACM Sigmetrics (extended abstract) 2013

Firming Solar Power, Y. Ghiassi-Farrokhfal, S. Keshav, C. Rosenberg, and F. Ciucu, ACM Sigmetrics (extended abstract) 2013

Characterizing the Impact of the Workload on the Value of Dynamic Resizing in Data Centers, K. Wang, M. Lin, F. Ciucu, A. Wierman, and C. Lin, IEEE Infocom (MC) 2013

Coding of Brownian Motion by Quantization of Exit Times, F. Poloczek and F. Ciucu, Allerton 2012

Longtime Behavior of Harvesting Spam Bots, O. Hohlfeld, T. Graf, and F. Ciucu, Internet Measurement Conference (IMC) 2012

A Leftover Service Curve Approach to Analyze Demultiplexing in Queueing Networks, H. Wang, F. Ciucu, and J. Schmitt, ICST ValueTools 2012

On the Impact of Finite Buffers on Per-Flow Delays in FIFO Queues, Y. Ghiassi-Farrokhfal and F. Ciucu, International Teletraffic Congress (ITC-24) 2012

Perspectives on Network Calculus - No Free Lunch but Still Good Value, F. Ciucu and J. Schmitt, ACM Sigcomm 2012

Characterizing the Impact of the Workload on the Value of Dynamic Resizing in Data Centers, K. Wang, M. Lin, F. Ciucu, A. Wierman, and C. Lin, ACM Sigmetrics/Performance (extended abstract) 2012

On the Scaling of Non-Asymptotic Capacity in Multi-Access Networks with Bursty Traffic, F. Ciucu, IEEE International Symposium on Information Theory (ISIT) 2011

On Expressing Networks with Flow Transformations in Convolution-Form, F. Ciucu, J. Schmitt, and H. Wang, IEEE Infocom 2011

On the Convergence to Fairness in Overloaded FIFO Systems, F. Ciucu, O. Hohlfeld, and L. Chen, IEEE Infocom 2011

On Revealing the ARQ Mechanism of MSTV, O. Hohlfeld, B. Balarajah, S. Benner, A. Raake, and F. Ciucu, IEEE ICC 2011

Non-Asymptotic Throughput and Delay Distributions in Multi-Hop Wireless Networks, F. Ciucu, O. Hohlfeld, and P. Hui, Allerton 2010

Non-Asymptotic Delay Bounds for Networks with Heavy-Tailed Traffic, J. Liebeherr, A. Burchard and F. Ciucu, IEEE Infocom 2010

On Computing Bounds on Average Backlogs and Delays with Network Calculus, F. Ciucu and O. Hohlfeld, IEEE ICC 2010

The Routerlab: Emulating Internet Characteristics in a Room, A. Mehmood, O. Hohlfeld, D. Levin, A. Wundsam, F. Ciucu, F. Schneider, A. Feldmann, and R.-P. Braun, ITG Symposium on Photonic Networks 2010

End-to-End Delay Analysis for Networks with Partial Assumptions of Statistical Independence, F. Ciucu, ICST ValueTools 2009

The Stochastic Network Calculus: A Modern Approach to Queueing Using Inequalities, F. Ciucu, Asian Internet Engineering Conference (AINTEC) 2009

Scaling of Buffer and Capacity Requirements for Voice Traffic in Packet Networks, F. Ciucu and O. Hohlfeld, International Teletraffic Congress (ITC-21) 2009

A Case for Decomposition of FIFO Networks, F. Ciucu and J. Liebeherr, IEEE Infocom 2009

Network Calculus Delay Bounds in Queueing Networks with Exact Solutions, F. Ciucu, International Teletraffic Congress (ITC-20) 2007

On Ω(HlogH) Scaling of Network Delays, A. Burchard, J. Liebeherr, and F. Ciucu, IEEE Infocom 2007

A Network Service Curve Approach for the Stochastic Analysis of Networks, F. Ciucu, A. Burchard, and J. Liebeherr, ACM Sigmetrics 2005

On Multiplexing Gain for Networks with Deterministic Delay Guarantees, F. Ciucu, B. Mark, and R. Simon, IEEE Globecom 2003

The Partially Stopped Leaky Bucket: An Efficient Traffic Regulator with Constant Time Implementation, F. Ciucu, B. Mark, and R. Simon, SPECTS 2002

Disciple-COA: From Agent Programming to Agent Teaching, M. Boicu, G. Tecuci, D. Marcu, M. Bowman, P. Shyr, F. Ciucu, and C. Levcovici, International Conference on Machine Learning (ICML) 2000

Rapid Development of a High Performance Knowledge Base for Course of Action Critiquing, G. Tecuci, M. Boicu, D. Marcu, M. Bowman, F. Ciucu, and C. Levcovici, 17th Conference on Artificial Intelligence (AAAI) 2000

### Publications in Journals

A Stochastic Power Network Calculus for Integrating Renewable Energy Sources into the Power Grid, K. Wang, F. Ciucu, C. Lin, and S. Low, IEEE Journal on Selected Areas in Communications: Smart Grid Communications Series, 30:6(1037-1048), 2012

Stochastic Bounds for Randomized Load Balancing, A.S. Godtschalk and F. Ciucu, Performance Evaluation Review, 40:3 (74-76), 2012

Delay Bounds in Communication Networks with Heavy-Tailed and Self-Similar Traffic, J. Liebeherr, A. Burchard, and F. Ciucu, IEEE Transactions on Information Theory, 58(2):1010-1024, 2012

On Superlinear Scaling of Network Delays, A. Burchard, J. Liebeherr, and F. Ciucu, IEEE/ACM Transactions on Networking, 19(4):1043-1056, 2011

Non-Asymptotic Analysis of Mobile Ad-Hoc Networks, F. Ciucu, Performance Evaluation Review, 39(1):359-360, 2011

Viewing Impaired Video Transmissions from a Modelling Perspective, O. Hohlfeld and F. Ciucu, Performance Evaluation Review, 37(2):33-35, 2009

Exponential Supermartingales for Evaluating End-to-End Backlog Bounds, F. Ciucu, Performance Evaluation Review, 35(2):21-23, 2007

Scaling Properties of Statistical End-to-End Bounds in Network Calculus, F. Ciucu, A. Burchard, and J. Liebeherr, IEEE Transactions on Information Theory, Joint Special Issue with IEEE/ACM Transactions on Networking, 52(6):2300-2312, 2006

### Other Publications

BufferBloat: How Relevant? A QoE Perspective on Buffer Sizing, O. Hohlfeld, E. Pujol, F. Ciucu, A. Feldmann, and P. Barford, TR 2012-11 TU Berlin, Nov. 2012

Scaling Properties in the Stochastic Network Calculus, F. Ciucu, PhD Thesis, University of Virginia, 2007