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February 15, 2018


Thursday, February 15, 2018

SOURCE Tri-School Household Cleaning Supply Drive: Mon, Feb 5th - Fri, Feb 16th (Multi-Day Event)
All Day

East Baltimore

Some families go without the basic essentials. Items such as cleaning supplies can make a difference. Donate to the SOURCE Tri-School Household Cleaning Supplies Drive! SOURCE is accepting new and unopened cleaning supplies for Baltimore families in need. Items will be donated and distributed to families through our community-based partner organizations. Collection boxes will be located in JHSPH Student Lounge and Student Affairs (E1002), SON Lobby and SOM Armstrong Building Lobby. Items can also be dropped off at SOURCE – 615 N. Wolfe St., W1600. Co-Sponsors include: JHSPH Public Health Film Society, SON Student Nurses Association and SOM SNMA.
Biostatistics Help: Faculty, Staff, Pre-MD and Post-Doc Walk-In Clinic
11:00 AM - 12:00 PM

Biostatistics consulting is available to all Johns Hopkins University faculty, staff, pre-MDs and post-docs conducting clinical and translational research. 11:00 AM – 12:00 PM Wolfe Street Building Room: E3142
Alcohol: Leading Risk Factor for Public Health
12:00 PM - 1:30 PM

Join us as we kick off our 10th anniversary celebration with a special conversation on alcohol, a leading risk factor for public health.

Leadership from the Johns Hopkins International Injury Research Unit and Center for Alcohol Marketing and Youth will speak, as will an expert from the National Academies of Sciences, Engineering, and Medicine, which recently released its report, "Getting to Zero Alcohol-Impared Driving Fatalities: A Comprehensive Approach to a Persistent Problem."

A faciliated discussion and light reception will follow.

Thursday, February 15, 2018
12:00 p.m. - 1:30 p.m.

Feinstone Hall (E2030)
Johns Hopkins Bloomberg School of Public Health
615 N. Wolfe Street
Baltimore, MD 21205

Joel Specter "Producing Surjective Arboreal Galois Representations ."
3:00 PM - 4:00 PM


Speaker: Joel Specter (JHU) Abstract: For most degree n polynomials defined over a number field F the Galois action on the roots is as unrestricted as possible - the splitting field is an S_n extension. In 1985, RWK Odoni found that the same is true for iterates polynomials. One may give the set of roots of all compositional iterates of a polynomial the structure of a directed graph: a pair of roots are connected if one is the image of the other under the polynomial f. Odoni showed that for most polynomials of degree n the subgraph consisting of the roots of the first k compositional iterates is a regular, n-branching tree of height k and the Galois group acts as the full automorphism group of this tree. Odoni's theorem is a consequence of Hilbert irreducibility. He shows that for the generic polynomial f_{gen} over F (i.e. the polynomial over the rational function field over F whose coefficients are independent indeterminants) the set of roots of all compositional iterates forms a regular, n-branching tree and the geometric Galois group acts as the full automorphism group of this tree. One expects that the behavior of the generic polynomial to be mimicked by most specializations. Hilbert irreducibility implies this is the case for any finite number of iterates - this is Odoni's theorem. However, it does not guarantee the existence of any single specialization whose Galois group is as large as possible (i.e. isomorphic to that of the generic polynomial) simultaneously for all iterates. Odoni conjectures that such a specialization exists. In this talk, I will discuss my proof of Odoni's conjecture over number fields. This expands on the work of Nicole Looper who proved the theorem for polynomials over Q of prime degree. The proof requires only a basic understanding of the ramification theory of algebraic curves and number fields and should be widely accessible. Time permitting, I will discuss a proof of the conjecture over the maximal cyclotomic extension of number fields.
Cognitive Science Department Colloquium on Scheduled Thursdays. See details for dates.
3:45 PM - 5:00 PM


Cognitive Science Department Colloquium Presentation on Scheduled Thursdays. Please see for schedule and full details.
Faculty Candidate Seminar- International Health and The Berman Institute of Bioethics
4:00 PM - 5:00 PM

Bloomberg School of Public Health

Ethical, Legal & Social Considerations Implementing Emerging Technologies for International Health:  Integrating Stakeholder and "on-the-ground" Perspectives.

Subhashini Chandrasekharan, PhD

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