@conference {
	title = {A Model Based Platform for Design and Optimization of Multi-hop 802.11 Wireless Networks},
	author = {Baras, John S., Tabatabaee, Vahid., Jain, Kaustubh.},
	year = {2011},
	month = {10/2011},
	abstract = {We develop a loss model for multi-hop wireless networks based on IEEE 802.11 MAC. Given a multi-hop network topology, connection demands and routes, we model the working of 802.11 MAC in DCF mode to find good approximations to average MAC layer losses, service times and carried load. The model is defined as an implicit function amongst the variables in the model and solved using a fixed point approach. Further, using Automatic Differentiation (AD) on the implicit function , we perform sensitivity analysis and use it in an optimization framework. As an illustration of how this model can help in design and optimization of wireless networks, we optimize the network throughput by appropriate load splitting along multiple paths. We validate our models using network simulations.},
	address = {Miami Beach, Florida},
	booktitle = {8th ACM International Symposium on Performance Evaluation of Wireless Ad Hoc, Sensor and Ubiquitous Networks (PE-WANSUN 201},
	pages = {pp. 17-24}
}
@conference {
	title = {A Systems Biology Model Studying the Role of Cholesterol in Alzheimer{\textquoteright}s Disease Progression},
	author = {Kyrtsos, C Rose., Baras, John S.},
	year = {2011},
	month = {10/2011},
	abstract = {A simplified network describing the interactions between the cholesterol and beta amyloid (Aβ) synthesis pathways was generated using information available from literature and the KEGG database. A system of non-linear differential equations was developed and modeled using several different initial conditions. Rate constants were approximated using ratiometric data from the literature, or by fitting parameters to obtain a stable simulation within given biological constraints. Simulations demonstrated the importance of negative feedback control by cholesterol in the regulation of beta-amyloid levels. Additionally, the effect of reduced LRP-1 levels and oscillatory cholesterol generation was studied.},
	address = {Kos Island, Greece},
	booktitle = {10th IEEE International Workshop on Biomedical Engineering (10thBioEng)},
	pages = {pp. 1-7}
}
@conference {
	title = {Return Channel Performance Evaluation of Enhanced SAMA VSAT with FMCSA and ACM Capability},
	author = {Perumal, Senni., Baras, John S., Roy-Chowdhury, Ayan., Petluri, Hemant S., Robinson, Mitch.},
	year = {2011},
	month = {10/2011},
	abstract = {In this paper, we describe our work on developing and evaluating detailed OPNET simulation models of an enhanced Very Small Aperture Terminal (VSAT) satellite Internet gateway and an enhanced satellite hub based on Cerona SkySPAN technology with capacity and latency optimizations in the return channel so as to allow significantly higher number of users and a better user experience. The Cerona SkySPAN technology uses Digital Video Broadcast via Satellite 2nd standard (DVB-S2) in the forward channel and Spread Aloha Multiple Access (SAMA) protocol in the return channel. We augment the SAMA return channel protocol with Fast Multi-Channel Slotted Aloha (FMCSA) protocol and Adaptive Coding and Modulation (ACM). FMCSA combines Multi-Channel Slotted Aloha (MCSA) with packet level forward error correction (FEC) for new messages and scheduled retransmissions for partially received messages. This protocol increases the maximum possible throughput of SAMA, thus supporting higher number of users. FMCSA also reduces the delay of multi-slot short messages (e.g., HTTP requests) while providing more robust delay performance with respect to load fluctuations, thus resulting in a better user experience. We incorporate Adaptive Coding and Modulation in the return channel in order to automatically adapt the coding and modulation to changing channel conditions so as to ensure remote data service irrespective of the channel degradation due to interference, rain fade or other conditions. We show via OPNET simulations that the enhanced SAMA VSAT with FMCSA and ACM improves the throughput, latency and robustness of the SkySPAN SAMA system. We also compare, via OPNET simulations, the enhanced SAMA system (with FMCSA and ACM) with a DVBRCS system to show improvements in user experience.},
	address = {Palermo, Italy},
	booktitle = {17th Ka and Broadband Communications, Navigation and Earth Observation Conference},
	pages = {pp. 417-424}
}
@conference {
	title = {Wireless Information Infrastructures and the Future Internet:  Protocol Components, System Architectures, Security and Privacy},
	author = {Baras, John S.},
	year = {2011},
	month = {10/2011},
	abstract = {Broadband Communication Infrastructures are expanding rapidly and are becoming ubiquitous. They are affecting every aspect of life and work. They are shaping the architecture, protocols and operation of the evolving future Internet. In this tutorial we describe major recent advances, challenges and opportunities in this critical area, from an integrated systems perspective. Hardware and physical layer advances are making possible new programmable types of networks and services. In the wireless arena physical layer advances mitigate interference (OFDM, MIMO, etc.) and will provide energy and bandwidth efficient and reliable communications. Services over the Future Internet and associated architectures are rapidly expanding and are increasingly interacting and integrated.},
	address = {Brest, France},
	booktitle = {Wireless Personal Multimedia Communications Symposium (WPMC{\textquoteright}11)}
}
