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Sponsored Artificial Intelligence: A Modern Approach, Global Edition Artificial Intelligence: A Modern Approach, Global Edition

Author

Pierre R. Nicolas

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3 papers indexed here

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Oct 2026

Adaptive local-minimum escape strategies for SPGD-based space telescope alignment

Stochastic Parallel Gradient Descent (SPGD) is widely used for model-free optical alignment because it produces an implicit descent signal when no explicit gradient is available. We use SPGD in the third of four sequential stages (blind-scan, model-based fit, SPGD, focus-diverse phase retrieval) of the commissioning pi...

Ryan Luu, Solvay A. Blomquist, Heejoo Choi et al. · 0 citations
Oct 2026

Upgraded optical design of a multi-band long-slit far-UV spectroscopic payload for high-resolution detection of diffuse galactic emission

Ardua is a mission concept proposed for NASA’s ASTRA Initiative and submitted to COPAG and PhysPAG, combining Far-UV (FUV) and X-ray instruments to investigate the baryon cycle connecting stars to the cosmic web through observations of the circumgalactic medium (CGM). This proceeding focuses on the preliminary optical...

Changgone Kim, Pierre R. Nicolas, Haeun Chung et al. · 0 citations
Open access Aug 2026

On-orbit coarse alignment of three mirror anastigmat telescopes utilizing blind scanning and stochastic processes

Optical alignment of an astronomical three-mirror anastigmat (TMA) telescope is a challenging endeavor where misalignments may degrade image quality beyond what is possible to correct using simple wavefront measurement techniques. Traditionally, the primary and secondary mirrors of large-scale telescopes are aligned wi...

Solvay A. Blomquist, Heejoo Choi, Hyukmo Kang et al. · 0 citations

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