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1. Teaching a black-box learner

   Dasgupta, S; Hsu, D; Poulis, S; Zhu, X (January 2019, International Conference on Machine Learning)
2. Teaching a black-box learner

   Dasgupta, S; Hsu, D.J.; Poulis, S. (January 2019, Proceedings of Machine Learning Research)

   null (Ed.)

   One widely-studied model of teaching calls for a teacher to provide the minimal set of labeled examples that uniquely specifies a target concept. The assumption is that the teacher knows the learner’s hypothesis class, which is often not true of real-life teaching scenarios. We consider the problem of teaching a learner whose representation and hypothesis class are unknown—that is, the learner is a black box. We show that a teacher who does not interact with the learner can do no better than providing random examples. We then prove, however, that with interaction, a teacher can efficiently find a set of teaching examples that is a provably good approximation to the optimal set. As an illustration, we show how this scheme can be used to shrink training sets for any family of classifiers: that is, to find an approximately-minimal subset of training instances that yields the same classifier as the entire set. 

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3. Teaching a black-box learner

   Dasgupta, Sanjoy; Hsu, Daniel; Poulis, Stefanos; Zhu, Xiaojin (January 2019, International Conference on Machine Learning)
4. Current Sheet Alignment in Oblique Black Hole Magnetospheres: A Black Hole Pulsar?

   https://doi.org/10.3847/2041-8213/ad4a5b  

   Selvi, S; Porth, O; Ripperda, B; Sironi, L (June 2024, The Astrophysical Journal Letters)

   Abstract We study the magnetospheric evolution of a nonaccreting spinning black hole (BH) with an initially inclined split monopole magnetic field by means of 3D general relativistic magnetohydrodynamic simulations. This serves as a model for a neutron star (NS) collapse or a BH–NS merger remnant after the inherited magnetosphere has settled into a split monopole field creating a striped wind. We show that the initially inclined split monopolar current sheet aligns over time with the BH equatorial plane. The inclination angle evolves exponentially toward alignment, with an alignment timescale that is inversely proportional to the square of the BH angular velocity, where higher spin results in faster alignment. Furthermore, magnetic reconnection in the current sheet leads to exponential decay of event-horizon-penetrating magnetic flux with nearly the same timescale for all considered BH spins. In addition, we present relations for the BH mass and spin in terms of the period and alignment timescale of the striped wind. The explored scenario of a rotating, aligning, and reconnecting current sheet can potentially lead to multimessenger electromagnetic counterparts to a gravitational-wave event due to the acceleration of particles powering high-energy radiation, plasmoid mergers resulting in coherent radio signals, and pulsating emission due to the initial misalignment of the BH magnetosphere. 

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5. Attracting Black students to linguistics through a Black-centered Introduction to Linguistics course

   https://doi.org/10.1353/lan.2021.0007  

   Calhoun, Kendra; Charity Hudley, Anne H.; Bucholtz, Mary; Exford, Jazmine; Johnson, Brittney (January 2021, Language)

   null (Ed.)