On the graph labellings arising from phylogenetics

We study semigroups of labellings associated to a graph. These generalise the Jukes-Cantor model and phylogenetic toric varieties defined in [Buczynska W., Phylogenetic toric varieties on graphs, J. Algebraic Combin., 2012, 35(3), 421–460]. Our main theorem bounds the degree of the generators of the semigroup by g + 1 when the graph has first Betti number g. Also, we provide a series of examples where the bound is sharp.publishe

Tool-Naming by Iron Workers

First unionized in the latter half of the nineteenth century, the trade of iron worker developed at a time when the industrial revolution allowed, for the first time in history, the erection of steel structures on a widespread scale. The technology of steel construction was new; the men hired to do the actual work, the construction gangs, were for the large part uneducated immigrants willing to work a dangerous job for low pay. The combination of a new technology with a class of worker unfamiliar with architectural and engineering terminology precipitated a colorful jargon which exists, in one form or another, to this day. The vocabulary of this jargon is functional, descriptive, often amusing, and usually obscene

Dynamics of precipitation pattern formation at geothermal hot springs

We formulate and model the dynamics of spatial patterns arising during the precipitation of calcium carbonate from a supersaturated shallow water flow. The model describes the formation of travertine deposits at geothermal hot springs and rimstone dams of calcite in caves. We find explicit solutions for travertine domes at low flow rates, identify the linear instabilities which generate dam and pond formation on sloped substrates, and present simulations of statistical landscape evolution

Discovery of a New Deeply Eclipsing SU UMa-Type Dwarf Nova, IY UMa (= TmzV85)

We discovered a new deeply eclipsing SU UMa-type dwarf nova, IY UMa, which experienced a superoutburst in 2000 January. Our monitoring revealed two distinct outbursts, which suggest a superoutburst interval of ~800 d, or its half, and an outburst amplitude of 5.4 mag. From time-series photometry during the superoutburst, we determined a superhump and orbital period of 0.07588 d and 0.0739132 d, respectively.Comment: 5 pages, 3 figures, accepted by PASJ lette

The Political Power of Religious Elites in Shaping Restrictive Reproductive Policies: A Comparative Analysis of Poland and Indonesia

Why do some religiously conservative countries advance in reproductive rights while others do not? Previous research emphasizes that religiosity, political institutionalism, and social movement strategies influence political actors, including members of the legislature, to shape preferred abortion policy outcomes. This thesis seeks to contribute to the literature by arguing that the political power of religious elites explains restrictive reproductive policy outcomes. In this thesis, I investigate the case of Poland and Indonesia. Despite differences in colonial history, religion, culture, and region, both countries share similar outcomes of restrictive reproductive policies and powerful religious elites, which makes for a unique and valuable comparative study