Compositional Practices in the Accompaniment of Celtic Trad Music

n this research paper, I look at how traditional Irish folk musicians—“Trad” as it is commonly referred to by musicians in the style––approach, think of, and perform accompaniment, specifically the contrapuntal style that is common amongst mandolin and bouzouki players. Trad has evolved greatly over the years. Originally, Trad was performed without any form of accompaniment—no guitar, no piano, no cello. Many solo instruments, such as the flute and the fiddle, would play the same melody with the only harmony occurring at moments where performers would momentarily diverge from the melody with an improvised ornament. Somewhere along its varied history, Trad evolved to incorporate counterpoint provided by an elaborate bassline with ingenious fills, constant reharmonizations, and moving harmony lines, creating a polyphony of three, four, or five independently moving lines. Through my research, I began to theorize that the beginnings of polyphony in Irish music began with the heterophony that takes place during unaccompanied solo performance. Furthermore, I have systematized the sonic requirements of Irish music into three sections: Melody, Center, and Countermelody

Observing the CMB at High-l using the VSA and AMI

We discuss two experiments - the Very Small Array (VSA) and the Arcminute MicroKelvin Imager (AMI) - and their prospects for observing the CMB at high angular multipoles. Whilst the VSA is primarily designed to observe primary anisotropies in the CMB, AMI is designed to image secondary anisotropies via the Sunyaev-Zel'dovich effect. The combined l-range of these two instruments is between l = 150 and ~10000.Comment: 8 pages, 13 figures. To be published in the proceedings of "The Cosmic Microwave Background and its Polarization", New Astronomy Reviews, (eds. S. Hanany and K.A. Olive

Cairn Stones: A Mosaic Memoir and Manual

These twenty essays are scraps and fractals of larger stories, windows on coming to understand the world and my place in it. Taken as a whole, the collection tells the story of a formation of open-eyed hope. Roughly, they run from 2001 to 2010, covering the same years as the terrorist attacks of 2001, the War on Terror’s beginnings and toll, Hurricane Katrina, and growing awareness of globalization and climate change. These are big topics, and the only way I can make sense of them, and my coming of age within and around them, is to tell the stories of the connections I found between world events and my own self. It’s not about me, but these are the only eyes and stories I have, the only way I know to point towards a different way. The essays are roughly chronological and do build on each other, but are not meant to fit tidily—the mosaic nature is part of the point. Partly, of course, these essays are my own efforts to grapple sense and meaning into the very bland and bleak way the world can often be. But, moreover, it is my hope that they will be read as posts and markers to guide a reader towards their own sense of belonging. It’s a manual, use it where and how you may

Direct Comparisons of Polarimetric C-Band and S-Band Radar in Snow

The Canadian Weather Radar Network is currently undergoing an upgrade to po- larimetric, S-Band radar systems. Forecasting experiences in Canada with the legacy C-Band radars lends to the idea that the narrow beamwidth of C-Band sys- tems is preferential for nowcasting the typical shallow lake-effect snow event. This idea is tested by comparing moments from King City radar, just north of Toronto, to the neighboring Buffalo, NY WSR-88D. By transforming the radar data from spherical coordinates to the Cartesian coordinate system, the two radars can be compared directly. Objective analysis indicates that the spatial patterns of reflec- tivity are very similiar, with King maintaining the obvious advantage in resolving fine scale features of lake-effect snow bands through a narrow physical beamwidth. Also, it is shown that comparatively, the mean reflectivity values obtained through this method are similiar, but King City maintains a slight advantage over Buffalo in detecting shallow snow-squalls. In regards to differential reflectivity, a case by case comparison is performed to determine any event biases from the King City radar. With biases removed, both radars indicate similiar mean values of differential re- flectivity, which agrees with theoretical expectations. Results also indicate that the bulk hydrometeor type in synoptic snowfalls tend towards pristine crystals, while lake-effect events tend towards aggregated snow

Eigenvector-Based Centrality Measures for Temporal Networks

Numerous centrality measures have been developed to quantify the importances of nodes in time-independent networks, and many of them can be expressed as the leading eigenvector of some matrix. With the increasing availability of network data that changes in time, it is important to extend such eigenvector-based centrality measures to time-dependent networks. In this paper, we introduce a principled generalization of network centrality measures that is valid for any eigenvector-based centrality. We consider a temporal network with N nodes as a sequence of T layers that describe the network during different time windows, and we couple centrality matrices for the layers into a supra-centrality matrix of size NTxNT whose dominant eigenvector gives the centrality of each node i at each time t. We refer to this eigenvector and its components as a joint centrality, as it reflects the importances of both the node i and the time layer t. We also introduce the concepts of marginal and conditional centralities, which facilitate the study of centrality trajectories over time. We find that the strength of coupling between layers is important for determining multiscale properties of centrality, such as localization phenomena and the time scale of centrality changes. In the strong-coupling regime, we derive expressions for time-averaged centralities, which are given by the zeroth-order terms of a singular perturbation expansion. We also study first-order terms to obtain first-order-mover scores, which concisely describe the magnitude of nodes' centrality changes over time. As examples, we apply our method to three empirical temporal networks: the United States Ph.D. exchange in mathematics, costarring relationships among top-billed actors during the Golden Age of Hollywood, and citations of decisions from the United States Supreme Court.Comment: 38 pages, 7 figures, and 5 table

Catching NGC4051 in the low state with XMM-Newton

The Narrow Line Seyfert 1 galaxy NGC4051 shows unusual low flux states, lasting several months, when the 2-10 keV X-ray spectrum becomes unusually hard (photon index<1) while the spectrum at lower X-ray energies is dominated by a large soft excess. A Chandra TOO of the low state has shown that the soft excess and hard components are variable and well-correlated. The variability of the hard component rules out an origin in a distant reflector. Here we present results from a recent XMM-Newton TOO of NGC4051 in the low state, which allows a much more detailed examination of the nature of the hard and soft spectral components in the low state. We demonstrate that the spectral shape in the low state is consistent with the extrapolation of the spectral pivoting observed at higher fluxes. The XMM-Newton data also reveals the warm absorbing gas in emission, as the drop in the primary continuum flux unmasks prominent emission lines from a range of ion species.Comment: 4 pages, 4 figures. Proc. of the meeting: "The Restless High-Energy Universe" (Amsterdam, The Netherlands), E.P.J. van den Heuvel, J.J.M. in 't Zand, and R.A.M.J. Wijers Ed

Assessing Barriers to Health Care Access for New Americans

Introduction. Healthcare within the United States has been at the forefront of public discussion and political representation in recent years, particularly as it relates to healthcare access and barriers to said access. Focus has been placed on low-income groups that most generally represent the face of the average American, but this leaves the question: How are new Americans faring, and do their struggles match those faced by the rest of the country? The new Americans of Burlington, Vermont serve as a small window into a unique refugee population’s experiences with healthcare in the United States. Methods. A focus group consisting of 8 women was hosted on-site at the Burlington Housing Authority Franklin Square apartments. Questions were designed to determine demographic data as well facilitate subjective discussion on participants’ healthcare experiences. Translation services were provided by the resident manager. Results. Languages spoken were Mai Mai, Swahili, and English. Five major themes for healthcare access barriers were identified: language barriers, having children, transportation barriers, financial barriers, and a lack of preventative care. Sub- themes were also identified, which formed a taxonomy of barriers to healthcare access among the representative population. Discussion/Conclusions. The difficulties faced by new Americans are numerous and interrelated, leading to a perpetual cycle of insufficient healthcare. Throughout the discussion, the financial burden of healthcare was regularly raised as one of the most prominent issues faced. This concern matches with those found in similar, previous studies, that have analyzed the difficulties faced by the rest of America.https://scholarworks.uvm.edu/comphp_gallery/1254/thumbnail.jp

Peroxygenase Enzymatic Activity in Plants: Ginger, Rutabaga, and Jalapeno Peppers

Undergraduat

Differentially expressed genes match bill morphology and plumage despite largely undifferentiated genomes in a Holarctic songbird

© 2015 John Wiley & Sons Ltd. Understanding the patterns and processes that contribute to phenotypic diversity and speciation is a central goal of evolutionary biology. Recently, high-throughput sequencing has provided unprecedented phylogenetic resolution in many lineages that have experienced rapid diversification. The Holarctic redpoll finches (Genus: Acanthis) provide an intriguing example of a recent, phenotypically diverse lineage; traditional sequencing and genotyping methods have failed to detect any genetic differences between currently recognized species, despite marked variation in plumage and morphology within the genus. We examined variation among 20 712 anonymous single nucleotide polymorphisms (SNPs) distributed throughout the redpoll genome in combination with 215 825 SNPs within the redpoll transcriptome, gene expression data and ecological niche modelling to evaluate genetic and ecological differentiation among currently recognized species. Expanding upon previous findings, we present evidence of (i) largely undifferentiated genomes among currently recognized species; (ii) substantial niche overlap across the North American Acanthis range; and (iii) a strong relationship between polygenic patterns of gene expression and continuous phenotypic variation within a sample of redpolls from North America. The patterns we report may be caused by high levels of ongoing gene flow between polymorphic populations, incomplete lineage sorting accompanying very recent or ongoing divergence, variation in cis-regulatory elements, or phenotypic plasticity, but do not support a scenario of prolonged isolation and subsequent secondary contact. Together, these findings highlight ongoing theoretical and computational challenges presented by recent, rapid bouts of phenotypic diversification and provide new insight into the evolutionary dynamics of an intriguing, understudied non-model system. See also the Perspective by Lifjel