Purdue Research Foundation

Princeton University

Nec Laboratories America, Inc.

Vijay Raghunathan

Arnab Raha

Srimat T Chakradhar

Kaushik Roy

Anand Raghunathan

Niraj K Jha

Woo Suk Lee

Chao Lu

Nupur Kothari

Kiran Nagaraja

Florin Sultan

Younghyun Kim

Sang Phill Park

Hrishikesh Jayakumar

A heuristic method of reducing energy consumption in a system having a plurality of subsystems is disclosed which includes identifying one or more approximation parameters in each of a plurality of subsystems, for an application that is run on the system with a predefined quality minimum approximating performance of each of the plurality of subsystems, determining energy savings for the system based on the approximation, sorting the plurality of subsystems based on system-level energy savings, classifying each of the plurality of subsystems into coarse and fine subsystems based on energy savings, and optimizing approximation of the one or more subsystems by i) approximating the coarse subsystems, and ii) approximating the fine subsystems.

System architecture and method of processing data therein

According to some embodiments, a system for securing communications between an implantable wearable medical device (IWMD) and an external device (ED) is disclosed. The system includes a wireless radio frequency (RF) channel configured for communication between the IWMD and the ED. The system further includes a vibration-based side channel configured for verifying communication between the IWMD and the ED such that the RF channel is activated only when the IWMD detects a vibration signal generated by an ED.

Vibration-based secure side channel for medical devices

A microcontroller system which employs an intermediate approach in hybrid FRAM-SRAM that involves memory mapping of program sections to retain the reliability benefits provided by FRAM while performing almost as efficiently as an SRAM-based system. They system utilizes an energy-aware memory mapping method which maps different program sections to the hybrid FRAM-SRAM MCU such that energy consumption is minimized without sacrificing reliability. The method comprises a memory initialization map, which performs a one-time characterization to find the optimal memory map for the functions that constitute a program. The method further comprises an energy alignment, a hardware/software method that aligns the system's powered-on time intervals to function execution boundaries, which results in further improvements in energy efficiency and performance.

Microcontroller energy management system

A power converter is provided for an energy harvesting system of a micro-scale electronic device. The power converter is configured to transfer electrical energy from an energy transducer to an energy storage device. The power converter illustratively includes a tree topology charge pump.

Efficient power conversion for ultra low voltage micro scale energy transducers

A computer implemented technique framework, prototype tool and associated methods that provide a high degree of visibility and control over the in-field execution of software in a minimally intrusive manner wherein developer-defined correctness tests and validation logic are embedded into the sensor node itself, making in-field software testing autonomous without necessitating continuous developer participation.

Visibility and control of wireless sensor networks

Growing community of inventors

West Lafayette, IN, United States of America

Vijay Raghunathan