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Justo E. Karell

Simulation Engineer. Researcher. Adjunct.

I like simulating fluids and plasmas, as well as optimizing processes that close resource gaps. My work has mostly focused on cut-cell grid methods and plasma kinetics, building tools and products for underserved infrastructure, and teaching deep learning and NLP at Stevens Institute of Technology. On the side, I write Weekly Catalysts, a quantitative finance newsletter that turns alternative data — like sponsored-stock patterns on financial YouTube — into systematic trading strategies and macro research.

Food Rescue Calculator: Monte Carlo distribution of net benefit per donation trip, with sensitivity plots versus units donated, distance, and donor income. — Food Rescue Calculator — analytical and Monte Carlo net-benefit model under the PATH Act enhanced deduction cap.

Left: log-log plot of L1 error versus mesh size for UM-SRD, SRD, and Base FV methods. Right: contour plot of the UM-SRD solution at T=1 with N=160. — Grid convergence and UM-SRD solution at T=1, N=160 for 2D smooth advection.

Horizontal bar chart of mean short-position excess return versus SPY across the top 20 entry/exit day combinations. — Mean excess return vs SPY by entry and exit window, ZipTrader sponsored stock short strategy backtest.

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