• Acquiring machine learning skills via online courses, readings, and projects.

• Designed, architected, developed, and launched the free-to-play iOS game app ShapeShifters. The app was written in Objective-C, followed the MVC paradigm, and utilized the libraries: Foundation, UIKit, Core Graphics, Core Animation, CloudKit (iCloud), StoreKit (In-App Purchases), GameKit (Game Center), AVFoundation, CoreText, Google Firebase (mobile ads, analytics), and Chameleon (color scheme management). ShapeShifters was monetized via Google mobile ads and in-app purchases.• Built a responsive web page for ShapeShifters using HTML, CSS, and Bootstrap.• Developed and managed a marketing campaign for ShapeShifters on Facebook, Twitter, and Instagram.

• Developed a robust AFS (Advanced Frequency Sweep) feature for the Axiem EM simulator, achieving 2-10x simulation speedups and 95% convergence rate with high accuracy.• Implemented a FRVF (Fast Relaxed Vector Fitting) engine for the Axiem AFS and Microwave Office S-parameter modeling, yielding 10-100x speedup and 100x smaller memory footprint.• Developed a DVF (Delayed Vector Fitting) engine, achieving 2-10x speedup over standard VF.• Developed robust and efficient residue adjustment and pole perturbation methods for global S-parameter passivity enforcement, yielding 2-5x speedup at same accuracy.• Implemented advanced Krylov solvers such as GMRESR, MHGMRES (for multiple RHS), and LSQR, and ILU preconditioners.• Implemented rSVD and ACA (adaptive cross approximation) methods for MKL and H matrices.• Implemented HSPICE circuit synthesis from the DVF models.• Researched accuracy limitations of the vector fitting methods, and techniques to correct causality violations in raw Axiem data.• Architected the AFS performance suite to track convergence, performance and data integrity for the AFS feature in Axiem's simulator builds.• Assisted application and sales engineers in successfully resolving customer issues.

• Technical lead for HB (Harmonic Balance) technology. Accountable for innovation, advancements, and maintenance of HB simulation technology in ADS/RFDE and GoldenGate simulators.• Enhanced HB robustness by developing an auto convergence feature, effecting a convergence rate improvement from 70% to over 90%. Retained major customers (e.g. ST Microelectronics), as well as won new ones. Received an innovation award for the work.• Led and participated in a four person team development effort that achieved a cumulative HB speedup of 5x at default settings through a set of new features (auto setup, solver predictor, etc). Received two innovation awards for this work.• Developed advanced Krylov-HB preconditioners such as the ITP (iterative time-domain) and SCP (schur-complement) preconditioners, achieving simulation speedups from 2-10x.• Led and participated in a number of other projects within the team: predictor-driven auto HB assisted HB yielding 2.7x speedup for multi-tone simulations, automated transient-assisted HB used for dividers, and memory predictor optimizing simulation setup for given RAM.• Developed a number of other features including DC preconditioner speed and robustness enhancements, nonlinear solver improvements (new convergence modes), and polynomial-based nonlinear RLC devices.• Architected the HB benchmark suite, used to track HB convergence, speed, and data integrity of ADS/RFDE simulator builds. Interpreted complex simulation data using statistical methods.• Successfully resolved simulation issues and introduced new capabilities to key customers such as ST Microelectronics and Freescale to resolve simulation issues on site..• Developed and delivered seven training classes on circuit simulation to the field, application, and R&D engineers covering HB convergence, HB speedups, and Krylov methods.

• Developed the Time-Mapped HB analysis for fast simulation of highly nonlinear RF circuits with rapid transitions, yielding speedups of up to 6x. Work implemented in Motorola's MICA simulator and published in Ph.D. Thesis, CICC, and DAC 1999 conferences.• Developed methodologies for high-capacity and high-performance (fast transient) simulation of large mixed-signal SoC designs with emphasis on SOI circuits.• Assisted circuit designers in simulation work and problem resolutions.