Power Politics in the Xiongnu Empire

This thesis employs an integrated approach of the historical and archaeological evidence relevant to the study of the Xiongnu empire (3rd century BC – 1st century AD) in an attempt to construct new contexts of understanding the political strategies for securing and ensuring power, legitimacy, and authority in the steppes. I have relied upon the full corpus of Chinese records which address the Xiongnu entity, synthesized the entirety of excavated materials in China, South Siberia, and Mongolia which relate to the Xiongnu phenomenon, and incorporated new survey and excavation data from two regions of the Xiongnu empire. Through the course of the dissertation, I utilize a paradigm of imperial strategies, rather than typologies of imperial polities, in order to provide a less restrictive manner of reconstructing the power politics of the steppe empire. A diachronic consideration of the combined textual narratives and archaeological materials exhibits two distinct periods of the Xiongnu polity. This dissertation focuses on the shifts between these two periods and the resulting new traditions that sought to distinguish and elevate restricted ranks of the imperial élite and assert a cosmopolitan culture of steppe empire that together would ensure authority and control both within the empire and toward its neighbors

How Genre-Trained Tutors Affect Student Writing and Perceptions of the Writing Center

Writing center scholars have long debated whether writers are best served by “generalist” tutors trained in writing center pedagogy or “specialist” tutors with insider knowledge about a course’s content or discipline-specific discourse conventions. A potential compromise that has emerged is training tutors in the purposes and features of specific genres. The writing center literature showcases many different approaches to genre training. However, little empirical research, if any, has explored how tutors’ genre knowledge affects session outcomes. The present study used a mixed-methods approach to compare session outcomes for students who worked with generalist and genre-trained tutors. We analyzed pre-consultation and revised literature review drafts to determine whether students who worked with tutors trained in the genre of literature reviews improved their drafts more or revised their drafts differently than students who worked with generalist tutors. Additionally, we performed a qualitative analysis of student reflections about their writing processes to explore how tutor training impacts students’ impressions of their consultations. Findings indicated that students who worked with genre-trained tutors revised their drafts more substantively than did students who worked with generalist tutors. Moreover, students who worked with genre-trained tutors left with notably better and richer impressions of their consultations

The Star Formation History of LGS 3

We have determined the distance and star formation history of the Local Group dwarf galaxy LGS 3 from deep Hubble Space Telescope WFPC2 observations. LGS 3 is intriguing because ground-based observations showed that, while its stellar population is dominated by old, metal-poor stars, there is a handful of young, blue stars. Also, the presence of HI gas makes this a possible ``transition object'' between dwarf spheroidal and dwarf irregular galaxies. The HST data are deep enough to detect the horizontal branch and young main sequence for the first time. A new distance of D=620+/-20 kpc has been measured from the positions of the TRGB, the red clump, and the horizontal branch. The mean metallicity of the stars older than 8 Gyr is Fe/H = -1.5 +/- 0.3. The most recent generation of stars has Fe/H ~ -1. For the first few Gyr the global star formation rate was several times higher than the historical average and has been fairly constant since then. However, we do see significant changes in stellar populations and star formation history with radial position in the galaxy. Most of the young stars are found in the central 63 pc (21''), where the star formation rate has been relatively constant, while the outer parts have had a declining star formation rate.Comment: To appear in The Astrophysical Journal, 26 pages, 14 figures, uses AASTe

Magnetic field dependence of the internal quality factor and noise performance of lumped-element kinetic inductance detectors

We present a technique for increasing the internal quality factor of kinetic inductance detectors (KIDs) by nulling ambient magnetic fields with a properly applied magnetic field. The KIDs used in this study are made from thin-film aluminum, they are mounted inside a light-tight package made from bulk aluminum, and they are operated near $150 \, \mathrm{mK}$. Since the thin-film aluminum has a slightly elevated critical temperature ($T_\mathrm{c} = 1.4 \, \mathrm{K}$), it therefore transitions before the package ($T_\mathrm{c} = 1.2 \, \mathrm{K}$), which also serves as a magnetic shield. On cooldown, ambient magnetic fields as small as approximately $30 \, \mathrm{\mu T}$ can produce vortices in the thin-film aluminum as it transitions because the bulk aluminum package has not yet transitioned and therefore is not yet shielding. These vortices become trapped inside the aluminum package below $1.2 \, \mathrm{K}$ and ultimately produce low internal quality factors in the thin-film superconducting resonators. We show that by controlling the strength of the magnetic field present when the thin film transitions, we can control the internal quality factor of the resonators. We also compare the noise performance with and without vortices present, and find no evidence for excess noise beyond the increase in amplifier noise, which is expected with increasing loss.Comment: 5 pages, 4 figure

SAURON Observations of Disks in Early-Type Galaxies

We briefly describe the SAURON project, aimed at determining the intrinsic shape and internal dynamics of spheroids. We focus here on the ability of SAURON to identify gaseous and stellar disks and to measure their morphology and kinematics. We illustrate some of our results with complete maps of NGC3377, NGC3623, and NGC4365.Comment: 4 pages, 4 figures (newpasp.sty). To appear in ASP Conf. Series "Galaxy Disks and Disk Galaxies", eds. J.G. Funes S.J. & E.M. Corsini. Version with full resolution images available at http://www.strw.leidenuniv.nl/~bureau/pub_list.htm

Proto-Urban Establishments in Inner Asia : Surveys of an Iron Age Walled Site in Eastern Mongolia

Funding Information: The field expedition in 2015 was funded by National Geographic Society (#W321-14). Geomagnetic and DGPS survey equipment was graciously loaned to us from the Graduate School of Human Development in Landscapes at Christian-Albrechts-Universität zu Kiel, and members of the Institut für Ur-und Frühgeschichte at CAU-Kiel gave assistance in the field. Radiocarbon dating of bone and charcoal samples were conducted at Poznań Radiocarbon Laboratory through funding from the ERC Consolidator Grant (#615040) for the “Nomadic Empires” Project at University of Oxford. Pedestrian surveys were conducted primarily by J. Wright, faunal analyses by T. Tüvshinjargal, and magnetic modelling by T. Wunderlich. We wish to thank D. Schultz for assistance in the field, as well as the National Museum of Mongolia and Tsagaan-Ovoo sum for helping facilitate many of the in-field project logistics. Lastly, our thanks to the extremely thorough comments from the editors and anonymous reviewers which greatly improved the clarity of the content. All remaining mistakes are of course ours. Publisher Copyright: © 2019, © 2019 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.Peer reviewe

Cellulosomics, a gene-centric approach to investigating the intraspecific diversity and adaptation of Ruminococcus flavefaciens within the rumen

Peer reviewedPublisher PD

A Titanium Nitride Absorber for Controlling Optical Crosstalk in Horn-Coupled Aluminum LEKID Arrays for Millimeter Wavelengths

We discuss the design and measured performance of a titanium nitride (TiN) mesh absorber we are developing for controlling optical crosstalk in horn-coupled lumped-element kinetic inductance detector arrays for millimeter-wavelengths. This absorber was added to the fused silica anti-reflection coating attached to previously-characterized, 20-element prototype arrays of LEKIDs fabricated from thin-film aluminum on silicon substrates. To test the TiN crosstalk absorber, we compared the measured response and noise properties of LEKID arrays with and without the TiN mesh. For this test, the LEKIDs were illuminated with an adjustable, incoherent electronic millimeter-wave source. Our measurements show that the optical crosstalk in the LEKID array with the TiN absorber is reduced by 66\% on average, so the approach is effective and a viable candidate for future kilo-pixel arrays.Comment: 7 pages, 5 figures, accepted for publication in the Journal of Low Temperature Physic

Disordered eating and eating disorders among women seeking fertility treatment: A systematic review

The purpose of this systematic review is to evaluate the prevalence of disordered eating and eating disorders among women seeking fertility treatment. Observational studies were searched in Ovid MEDLINE, Web of Science, Embase, and PsycInfo. Studies published prior to September 2020 when the search was conducted were considered. Inclusion criteria included (1) original and empirical research, (2) published in a peer-reviewed journal, and (3) reported on disordered eating among women seeking fertility treatment in the sample or reported on prevalence of eating disorders among women seeking fertility treatment in the sample. Independent screening of abstracts was conducted by two authors (LH and AH). Ten studies met the inclusion criteria. Sample size, study location, measures, and results for each study in this review were reported. Among women pursuing fertility treatment, rates of current eating disorders ranged from 0.5 to 16.7%, while past eating disorder prevalence rates ranged from 1.4 to 27.5%. Current anorexia nervosa or bulimia nervosa was reported by up to 2% and 10.3% of women, respectively, while history of anorexia nervosa or bulimia nervosa was reported by up to 8.5% and 3.3% of women, respectively. Binge eating disorder or other eating disorders were reported by up to 18.5% and 9.1% of women, respectively. Disordered eating pathology was endorsed by 1.6 to 48% of women seeking fertility treatment. Endorsement of pathological eating attitudes was generally higher among women seeking fertility treatment with current or past eating disorders as compared to community samples, with the exception of dietary restraint. Rates of current and past eating disorders are higher among women seeking fertility treatment than in the general population. Providers treating women with infertility should be cognizant of these prevalence rates and consider screening for eating pathology in their patients as this may contribute to their likelihood of successful conception and/or subsequent pregnancy outcomes