Browsing by Author "Mittu, Priya"
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Item Investigating a Cooperative System of Sensing and Transmitting Haptic Feedback of Soft Tissue for Robotic Surgical Applications(2020) Darwin, Sophia; Ghorab, Salma; Kulkarni, Priya; Marani, Melika; Margolis, Emma; Mittu, Priya; Pohland, Sara; Wills, Rachel; Yang, BaoRobotic-Assisted Surgery (RAS) improves upon traditional minimally invasive (MIS) and open surgical techniques by maintaining the benefits of MIS while also providing surgeons with a wider range of motion, increased depth perception, and control for tremors. However, an inherent limitation of the technology is that surgeons performing RAS must rely solely on visual feedback and lose the sense of touch. This creates a steep learning curve for the technique. Previous literature and results from our own survey of 15 surgeons using RAS suggests that the introduction of haptic feedback to RAS will improve overall patient outcomes as well as decrease error rates and operating times for surgeons. To address this, we proposed a proof-of-concept addition to RAS systems that relays the firmness of soft tissue to surgeons. We constructed a probe containing a force-sensitive resistor (FSR) to collect information on silicone samples of known varying firmness that mimic soft tissue. From the FSR, currents were generated and amplified into a solenoid actuator. By pressing on the actuator, the user feels a force corresponding to the firmness of the silicone. Preliminary testing of the integrated feedback system indicated that users were able to successfully distinguish between varying silicone firmnesses with an average accuracy of 38.89%. More testing is needed to further evaluate the system’s effectiveness and correct errors in initial test protocols.Item TimingCamouflage+ Decamouflaged(Association for Computer Machinery (ACM), 2023-06-05) Mittu, Priya; Liu, Yuntao; Srivastava, AnkurIn today’s world, sending a chip design to a third party foundry for fabrication poses a serious threat to one’s intellectual property. To keep designs safe from adversaries, design obfuscation techniques have been developed to protect the IP details of the design. This paper explains how the previously considered secure algorithm, TimingCamouflage+, can be thwarted and the original circuit can be recovered [15]. By removing wave-pipelining false paths, the TimingCamouflage+ algorithm is reduced to the insecure TimingCamouflage algorithm [16]. Since the TimingCamouflage algorithm is vulnerable to the TimingSAT attack, this reduction proves that TimingCamouflage+ is also vulnerable to TimingSAT and not a secure camouflaging technique [7]. This paper describes how wave-pipelining paths can be removed, and this method of handling false paths is tested on various benchmarks and shown to be both functionally correct and feasible in complexity.