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## October 9, 2017

#### Monday, October 09, 2017

Columbus Day
SOURCE Canned Food Drive: Mon, Oct 2 - Fri, Oct 13 (Multi-Day Event)
All Day

Bloomberg School of Public Health

Help local populations experiencing food insecurity by donating unopened and unexpired canned food items! Donation bin locations: JHSPH - E1002, SOURCE Office (W1600) and the first floor student lounge; SON - lobby entrance; SOM AMEB - lobby (by stairs).
(Cancelled) Seminars in Research in Biochemistry and Molecular Biology
12:00 PM - 1:00 PM

Bloomberg School of Public Health

Seminars in Research in Biochemistry and Molecular Biology
12:10 PM - 1:20 PM

Michelle Decker, ScD

Associate Professor and Director, Women's Health & Rights Program, Center for Public Health & Human Rights
Johns Hopkins Bloomberg School of Public Health

12:10 – 1:20 PM

Hampton House

Room: Auditorium B14-B

Contact Information: Shani Buggs | sbuggs1@jhu.edu

[multiple] Biostatistics Seminar
12:15 PM - 1:15 PM

Bloomberg School of Public Health

Biostatistics Seminar "Modeling Human Mobility and Risk of HIV Acquisition" Dr. Adrian Dobra, Associate Professor University of Washington
Biostatistics Help: Faculty, Staff, Pre-MD and Post Doc Walk-In Clinic
1:30 PM - 2:30 PM

Biostatistics consulting is available to all Johns Hopkins University faculty, staff, pre-MD and post docs conducting clinical and translational research. 1:30 – 2:30 PM Wolfe Street Building Room: E3142 Contact Information: Nita James | jhbc@jhu.edu
Shengwen Wang "Hausdorff stability of round spheres under small-entropy perturbation."
4:00 PM - 5:00 PM

Homewood

Speaker: Shengwen Wang, (JHU) Abstract: Colding-Minicozzi introduced the entropy functional on the space of all hypersurfaces in the Euclidean space when studying generic singularities of mean curvature flow. It is a measure of complexity of hypersurfaces. Bernstein-Wang proved that round spheres $\mathbb S^n$ minimize entropy among all closed hypersurfaces for $n\leq6$, and the result is generalized to all dimensions by Zhu. Bernstein-Wang later also proved that the round 2-sphere is actually Hausdorff stable under small-entropy perturbations. I will present in this talk the generalization of the Hausdorff stability to round hyper-spheres in all dimensions.
David Gepner" On negative K-theory, bounded t-structures, and the theorem of the heart."
4:30 PM - 5:30 PM

Homewood

Speaker: David Gepner, Purdue Abstract: After recalling the definition of negative K-theory, we will show that the negative K-groups of a stable infinity category vanish whenever the stable infinity category supports a bounded t-structure with noetherian heart. We will then use this to extend the Barwick-Neeman "theorem of the heart" to negative K-theory, use this to compute the negative K-theory of certain ring spectra, and demonstrate how negative K-groups obstruct the existence of bounded t-structures. This is joint work with B. Antieau and J. Heller.

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