A5012819177- Particle accelerators and beam dynamics
- IPv6, Mobility, Handover, Networks, Security
- Low-power high-performance VLSI design
- Particle Accelerators and Free-Electron Lasers
- Context-Aware Activity Recognition Systems
- Opportunistic and Delay-Tolerant Networks
- Service-Oriented Architecture and Web Services
- EEG and Brain-Computer Interfaces
- Mobile Ad Hoc Networks
- Smart Grid Energy Management
- Building Energy and Comfort Optimization
- VLSI and Analog Circuit Testing
- Caching and Content Delivery
- Superconducting Materials and Applications
- Network Traffic and Congestion Control
- Wireless Networks and Protocols
- Gaze Tracking and Assistive Technology
- Green IT and Sustainability
- Security and Verification in Computing
- Energy Harvesting in Wireless Networks
- IoT and Edge/Fog Computing
- Heart Rate Variability and Autonomic Control
- Physical Unclonable Functions (PUFs) and Hardware Security
- Mobile Agent-Based Network Management
- Interconnection Networks and Systems
University of Maryland, Baltimore County
2015-2024
Association of Pediatric Program Directors
2024
Fermi National Accelerator Laboratory
2023
United States Army
2022
DEVCOM Army Research Laboratory
2022
Eden Medical
2021-2022
Johns Hopkins Hospital
2022
United States Army Combat Capabilities Development Command
2022
Indian Institute of Technology Kharagpur
2003-2022
GIET University
2022
Networks composed of mobile nodes inherently suffer from intermittent connections and high delays. Performance can be improved by adding supporting infrastructure, including base stations, meshes, relays, but the cost-performance trade-offs different designs is poorly understood. To examine these trade-offs, we have deployed a large-scale vehicular network three infrastructure enhancement alternatives. The results deployments demonstrate some advantages each kind infrastructure; however,...
Maintaining optimal consistency in a distributed system requires that nodes be always-on to synchronize information. Unfortunately, mobile devices such as laptops do not have adequate battery capacity for constant processing and communication. Even by powering off unnecessary components, the screen disk, current only lifetime of few hours. Although PDAs sensors are similarly limited lifetime, PDA's power requirement is an order-of-magnitude smaller than laptop's, sensor's PDA's. By combining...
Disruption Tolerant Networks rely on intermittent contacts between mobile nodes to deliver packets using store-carry-and-forward paradigm. The key improving performance in DTNs is engineer a greater number of transfer opportunities. We earlier proposed the use throwbox nodes, which are stationary, battery powered with storage and processing, enhance capacity DTNs. However, throwboxes without efficient power management minimally effective. If too liberal their energy consumption, they will...
Networks-on-chip (NoC) has been proposed as a solution for addressing the design challenges of future high-performance nanoscale architectures. Innovative system-level performance models are required designing NoC based This paper presents VHDL cycle accurate register transfer level model evaluating latency, throughput, dynamic, and leakage power consumption interconnection We implemented parameterized architecture elements. The is on (i) size packets, (ii) length width physical links, (iii)...
The tremendous advancement and popularity of wireless access technologies necessitates the convergence multimedia (audio, video, text) services on a unified global (seamless) network infrastructure. Circuit-switched proprietary telecommunication networks are evolving toward more cost-effective uniform packet-switched such as those based IP. However, one key challenges for deployment Internet infrastructure is to efficiently manage user mobility. To provide seamless mobile users, several...
Disruption-tolerant networks (DTNs) rely on intermittent contacts between mobile nodes to deliver packets using a store-carry-and-forward paradigm. We earlier proposed the use of throwbox nodes, which are stationary, battery-powered with storage and processing, enhance capacity DTNs. However, throwboxes without efficient power management is minimally effective. If too liberal their energy consumption, they will fail prematurely. if conservative, may miss important transfer opportunities,...
Future-generation wireless networks have been envisioned as the integration of various access networks, including both wide area and local networks. In such a heterogeneous network environment, seamless mobility support is basis providing uninterrupted services to mobile users roaming between Because transparency lower-layer characteristics, ease deployment, greater scalability, application-layer-based session initiation protocol has considered right candidate for handling in However, SIP...
Networks-on-chip (NoC) has been proposed as a solution for addressing the design challenges of future high-performance nanoscale architectures. Innovative system-level performance models are required designing NoC based This paper presents VHDL cycle accurate register transfer level model evaluating latency, throughput, dynamic, and leakage power consumption interconnection We implemented parameterized architecture elements. The is on (i) size packets, (ii) length width physical links, (iii)...
Application-level protocol abstraction is required to support seamless mobility in next-generation heterogeneous wireless networks. Session initiation (SIP) provides the for multimedia applications such However, handoff procedure with SIP suffers from undesirable delay and hence packet loss some cases, which detrimental like voice over IP (VoIP) or streaming video that demand stringent quality of service (QoS) requirements. In this article we present a SIP-based architecture supports soft...
We study the interplay between turbulent heating, mixing, and radiative cooling in an idealized model of cool cluster cores. Active galactic nuclei (AGN) jets are expected to drive turbulence heat Cooling intracluster medium (ICM) stirring by AGN tightly coupled a feedback loop. impose loop balancing with heating. In addition heating plasma, also mixes it, suppressing formation cold gas at small scales. this regard, effect is analogous thermal conduction. For uniform plasma balance...
Energy recovery has been achieved in a multipass linear accelerator, demonstrating technology for more compact particle accelerators operating at higher currents and reduced energy consumption. delivered to the beam during first four passes through accelerating structure was recovered subsequent decelerating passes. High-energy efficiency by use of superconducting cavities permanent magnets. The fixed-field alternating-gradient optical system used return loop successfully transported...
A series of complex dependencies conspire to make it difficult model mobile networks, including mobility, channel and radio characteristics, power consumption. To address these challenges, we have designed built a testbed for large-scale experimentation, called the Diverse Outdoor Mobile Environment. DOME consists computer-equipped buses, battery-powered nomadic nodes, organic WiFi APs, municipal mesh network. While construction such as presents significant engineering challenge, this paper...
Recent technological advances in mobile-based access to social networking platforms and facilities update information real{time (e.g. Facebook) have allowed an individual's online presence be as ephemeral dynamic nature, her very thoughts interests. In this context, micro-blogging has been widely adopted by users effective means capture disseminate their actions a larger audience on daily basis. Interestingly, chatters of user obtained from micro-blogs offer unique source analyze interpret...
Home automation and environmental control is a key ingredient of smart homes. While systems for home exist, there are few that interact with individuals suffering from paralysis, paresis, weakness limited range motion common sequels resulting severe injuries such as stroke, brain injury, spinal cord injury many chronic (guillian barre syndrome) degenerative (amyotrophic lateral sclerosis) conditions. To address this problem, we present the design, implementation, evaluation Inviz, low-cost...
2D discrete cosine transform (DCT) is widely used as the core of digital image and video compression. In this paper, authors present a novel DCT architecture that allows aggressive voltage scaling by exploiting fact not all intermediate computations are equally important in system to obtain good quality with peak signal noise ratio (PSNR) > 30 dB. This observation has led us propose where paths less contributive PSNR improvement designed be longer than more It should also noted robustness...
2D discrete cosine transform (DCT) is widely used as the core of digital image and video compression. In this paper, authors present a novel DCT architecture that allows aggressive voltage scaling by exploiting fact not all intermediate computations are equally important in system to obtain "good" quality with peak signal noise ratio (PSNR) > 30 dB. This observation has led us propose where paths less contributive PSNR improvement designed be longer than more It should also noted robustness...
Homes powered fully or partially by renewable sources such as solar are becoming more widely adopted, however energy management strategies in these environments lacking. This paper presents the first results of a study that explores home automation techniques for achieving better utilization generated technologies. First, using network off-the-shelf sensing devices, we observe generation and consumption an off-grid is both variable predictable. Moreover, find reactive insufficient to prevent...
Quadriplegia and paraplegia are disabilities that result from injuries to the spinal cord neuromuscular disorders such as cerebral palsy. Patients suffering quadriplegia have varied levels of impaired motor movements, hence, performing quotidian tasks like controlling home appliances is challenging for quadriplegics. The use hand eye gestures perform these a plausible remedy, but available solutions often assume considerable limb movement, not fit long-term use, may be applicable...
Managing energy in the home is key to creating a sustainable future for our society. More tools are increasingly available measure usage, however these provide little insight into questions such as why an appliance consumes more than normal or what kinds of behavioral changes might be most likely reduce usage home. To answer questions, deeper understanding causal factors that influence necessary. In this work, we conduct broad study consumption individual devices Our first contribution...
There is tremendous interest in exploiting smartphones as a "community of sensors". It envisioned that this community-driven smartphone sensor network has unprecedented potential to sense heterogeneous phenomena ranging from sound pollution urban social dynamics. However, designing smartphone-resident middleware for opportunistic and objectiveoriented sensing these an open challenge. In paper, we propose USense, novel utility-driven executing tasks. USense different other mobile phone...