Homa Alemzadeh

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Malfunctioning medical devices are one of the leading causes of serious injury and death in the US. Between 2006 and 2011, 5,294 recalls and approximately 1.2 million adverse events were reported to the US Food and Drug Administration (FDA). Almost 23 percent of these recalls were due to computer-related failures, of which approximately 94 percent presented(More)
Networks on Chips (NoCs) provide a mechanism for handling complex communications in the next generation of integrated circuits. At the same time, lower yield in nano-technology, makes self repair communication channels a necessity in design of digital systems. This paper proposes a reliable NoC architecture based on specific application mapped onto an NoC.(More)
This paper presents design, implementation and evaluation of an efficient embedded hardware for accurate automated detection of epileptic seizures. Three hardware configurations are proposed and evaluated in terms of accuracy of detection, utilization of hardware resources, and power consumption. The results show that a solution based on combination of the(More)
This paper discusses the configuration of a fault-tolerant mesh-based NoC architecture. In this architecture, spare links provide a mechanism for rerouting data packets in presence of NoC faults. Two algorithms, Exhaustive and Greedy, are used to find the best configuration. The NoC is modeled at the high transaction level using SystemC TLM. This enables(More)
BACKGROUND Use of robotic systems for minimally invasive surgery has rapidly increased during the last decade. Understanding the causes of adverse events and their impact on patients in robot-assisted surgery will help improve systems and operational practices to avoid incidents in the future. METHODS By developing an automated natural language processing(More)
Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comment regarding this burden estimate or any other aspect of this(More)
A robust medical monitoring device should be able to provide intelligent diagnosis based on accurate analysis of physiological parameters in real-time. At the same time, such device must be able to adapt to the characteristics of a specific patient and desired diagnostic needs, and continue to operate even in presence of unexpected artifacts and accidental(More)
Robotic surgical systems are among the most complex medical cyberphysical systems on the market. Despite significant improvements in design of those systems through the years, there have been ongoing occurrences of safety incidents that negatively impact patients during procedures. This paper presents an approach for systems-theoretic safety assessment of(More)
With the evolution of Electronic System Level (ESL) design methodologies, we are experiencing an extensive use of Transaction-Level Modeling (TLM). TLM is a high-level approach to modeling digital systems where details of the communication among modules are separated from the those of the implementation of functional units. This paper represents a first(More)
This paper demonstrates targeted cyber-physical attacks on teleoperated surgical robots. These attacks exploit vulnerabilities in the robot's control system to infer a critical time during surgery to drive injection of malicious control commands to the robot. We show that these attacks can evade the safety checks of the robot, lead to catastrophic(More)