Intersecting Nations, Diverging Discourses: The Fraught Encounter of Chinese and Tibetan Literatures in the Modern Era

This is a two-pronged study of how the Chinese and Tibetan literary traditions have become intertwined in the modern era. Setting out from the contention that the study of minority literatures in China must be fundamentally multilingual in its approach, this dissertation investigates how Tibetans were written into Chinese literature, and how Tibetans themselves adopted and adapted Chinese literary discourses to their own ends. It begins with Lu Xun and the formative literary conceptions of nation in the late Qing and Republican periods – a time when the Tibetan subject was fundamentally absent from modern Chinese literature – and then moves to the 1980s, when Tibet and Tibetans belatedly, and contentiously, became valid subject matter for Han Chinese writers. The second aspect of the project situates modern Tibetan-language literature, which arose from the 1980s onwards, within the literary and intellectual context of modern China. I read Döndrup Gyel, modern Tibetan literature’s “father figure,” as working within unmistakably Lu Xun-ian paradigms, I consider the contradictions that arose when Tsering Döndrup’s short story “Ralo” was interpreted as a Tibetan equivalent of “The True Story of Ah Q,” and I analyze the rise of a “Tibetan May Fourth Movement” in the 2000s, which I argue presented a selective reading of modern China’s intellectual history. Throughout, I focus on the intersections and divergences at play and examine the ways in which these texts navigate complex and conflicting discourses of nationalism, statism, and colonialism. The conclusions of this research point us toward significant theoretical reconceptualizations of literary practices in the People’s Republic of China, which now include not only a vast body of Chinese-language writing on minority peoples, but also numerous minority-language literatures and distinct “national” literary traditions

Relative velocity of dark matter and baryonic fluids and the formation of the first structures

At the time of recombination, baryons and photons decoupled and the sound speed in the baryonic fluid dropped from relativistic to the thermal velocities of the hydrogen atoms. This is less than the relative velocities of baryons and dark matter computed via linear perturbation theory, so we infer that there are supersonic coherent flows of the baryons relative to the underlying potential wells created by the dark matter. As a result, the advection of small-scale perturbations (near the baryonic Jeans scale) by large-scale velocity flows is important for the formation of the first baryonic structures. This effect involves a quadratic term in the cosmological perturbation theory equations and hence has not been included in studies based on linear perturbation theory. We show that the relative motion suppresses the abundance of the first bound objects, even if one only investigates dark matter haloes, and leads to qualitative changes in their spatial distribution, such as introducing scale-dependent bias and stochasticity. We discuss the possible observable implications for high-redshift galaxy clustering and reionization

Dental College of Georgia teams up with Richmond County Health Department to help

Background: The Central Savannah River Area remains, for many of the poor, a dental health care shortage area. Each year, from December to March, fourth-year dental students perform outreach with faculty to search the community for unmet dental needs, including dental caries and periodontal disease, the treatment of which is required for the Central Regional Dental Testing Service (CRDTS) Exam, the dental licensing examination. Methods: Fourth year students at the Augusta University Dental College of Georgia recruit patients for free dental pre-screenings at health fairs, community centers, the Barnyard Flea Market, and the dental school. Persons with periodontitis are invited for further screenings at the dental school where they receive a free dental examination and dental radiographs. Many of these patients present with other dental needs requiring restorations, root canals, and extractions, conditions that potentially could disqualify them from receiving periodontal therapy during CRDTS. Through a collaborative effort with the Richmond County Health Department Dental Clinic, these patients receive the treatment for their acute dental needs, while also qualifying them for the periodontics portion of the exam. Results: Regardless of their qualification status for boards, the program provides referrals for patients to the Dental College of Georgia or the Richmond County Health Department, gives patients a chance to be informed about their oral health status, and gives qualifying patients the potential to receive discounted or even free dental work. The efforts of the senior dental students represent an oral public health service effective in achieving improvements in periodontal outcomes within our community. Conclusions: This program not only benefits the future dentists of Georgia by helping provide licensing board requirements, it also introduces dental students to a more diverse population and provides exposure to public health outreach. In addition, this program offers a valuable service to underserved populations who would otherwise have limited or no access to dental care

Signatures of hybridization in <i>Trypanosoma brucei</i>

Genetic exchange among disease-causing micro-organisms can generate progeny that combine different pathogenic traits. Though sexual reproduction has been described in trypanosomes, its impact on the epidemiology of Human African Trypanosomiasis (HAT) remains controversial. However, human infective and non-human infective strains of Trypanosoma brucei circulate in the same transmission cycles in HAT endemic areas in subsaharan Africa, providing the opportunity for mating during the developmental cycle in the tsetse fly vector. Here we investigated inheritance among progeny from a laboratory cross of T. brucei and then applied these insights to genomic analysis of field-collected isolates to identify signatures of past genetic exchange. Genomes of two parental and four hybrid progeny clones with a range of DNA contents were assembled and analysed by k-mer and single nucleotide polymorphism (SNP) frequencies to determine heterozygosity and chromosomal inheritance. Variant surface glycoprotein (VSG) genes and kinetoplast (mitochondrial) DNA maxi- and minicircles were extracted from each genome to examine how each of these components was inherited in the hybrid progeny. The same bioinformatic approaches were applied to an additional 37 genomes representing the diversity of T. brucei in subsaharan Africa and T. evansi. SNP analysis provided evidence of crossover events affecting all 11 pairs of megabase chromosomes and demonstrated that polyploid hybrids were formed post-meiotically and not by fusion of the parental diploid cells. VSGs and kinetoplast DNA minicircles were inherited biparentally, with approximately equal numbers from each parent, whereas maxicircles were inherited uniparentally. Extrapolation of these findings to field isolates allowed us to distinguish clonal descent from hybridization by comparing maxicircle genotype to VSG and minicircle repertoires. Discordance between maxicircle genotype and VSG and minicircle repertoires indicated inter-lineage hybridization. Significantly, some of the hybridization events we identified involved human infective and non-human infective trypanosomes circulating in the same geographic areas

The Assembly of Diversity in the Morphologies and Stellar Populations of High-Redshift Galaxies

We have studied the evolution in the morphologies, sizes, stellar-masses, colors, and internal color dispersion (ICD) of galaxies at z=1 and 2.3, using a near-IR, flux-limited catalog for the HDF-N. At z=1 most luminous galaxies have morphologies of early-to-mid Hubble-types, and many show transformations between their rest-frame UV-optical morphologies. Galaxies at z=2.3 have compact and irregular morphologies with no clearly evident Hubble-sequence candidates. The mean galaxy size grows from z=2.3 to 1 by 40%, and the density of galaxies larger than 3 kpc increases by 7 times. At z=1, the size-luminosity distribution is broadly consistent with that of local galaxies, with passive evolution. However, galaxies at z=2.3 are smaller than the large present-day galaxies, and must continue to grow in size and stellar mass. We have measured the galaxies' UV-optical ICD, which quantifies differences in morphology and the relative amount of on-going star-formation. The mean and scatter in galaxies' total colors and ICD increase from z=2.3 to 1. At z=1 many galaxies with large ICD are spirals, with a few irregular systems. Few z=2.3 galaxies have high ICD, and those that do are actively merging. We interpret this as evidence for the presence of older and more diverse stellar populations at z=1 that are not generally present at z>2. We conclude that the star-formation histories of galaxies at z>2 are dominated by discrete, recurrent bursts, which quickly homogenize the galaxies' stellar content, and are possibly associated with mergers. The increase in the stellar-population diversification by z<1.4 implies that merger-induced starbursts occur less frequently than at higher redshifts, and more quiescent star-forming modes dominate. This transition coincides with the emergence of Hubble-sequence galaxies. [Abridged]Comment: Accepted for publication in the Astrophysical Journal. 20 pages, in emulateapj forma

RELATIONSHIP OF REACTIVE STRENGTH AND BODY COMPOSITION IN ELITE AMERICAN FOOTBALL PLAYERS

Reactive strength represents the ability to change rapidly from eccentric to concentric contraction and may be influenced by body composition. The purpose of the study was to determine if body mass (BM), lean body mass (LBM), or percent fat mass (%FM) were associated with reactive strength. Twenty-five males undergoing training for the National Football League’s combine had their Reactive Strength Index (RSI) measured from a 4-jump drop jump (DJ) onto an electronic timing mat, and BM, LBM and %FM assessed via a BodPod. Pearson correlation coefficients showed moderate, negative significant correlations between RSI and BM (r(23)=-.531, p=.006), and RSI and LBM (r(23)=-.565, p=.003). RSI was not associated with %FM. Explosiveness appears related to heaviness but not fatness. Coaches may consider effects of body composition modulation on RSI

Spatially resolved spectroscopy of the globular cluster RZ 2109 and the nature of its black hole

We present optical HST/STIS spectroscopy of RZ 2109, a globular cluster in the elliptical galaxy NGC 4472. This globular cluster is notable for hosting an ultraluminous X-ray source as well as associated strong and broad [OIII] 4959, 5007 emission. We show that the HST/STIS spectroscopy spatially resolves the [OIII] emission in RZ 2109. While we are unable to make a precise determination of the morphology of the emission line nebula, the best fitting models all require that the [OIII] 5007 emission has a half light radius in the range 3-7 pc. The extended nature of the [OIII] 5007 emission is inconsistent with published models that invoke an intermediate mass black hole origin. It is also inconsistent with the ionization of ejecta from a nova in the cluster. The spatial scale of the nebula could be produced via the photoionization of a strong wind driven from a stellar mass black hole accreting at roughly its Eddington rate.Comment: 7 pages, 4 figures - accepted for publication in Ap

Three Decades of Changing Nutrient Stoichiometry from Source to Sea on the Swedish West Coast

European ecosystems have been subject to extensive shifts in anthropogenic disturbance, primarily through atmospheric deposition, climate change, and land management. These changes have altered the macronutrient composition of aquatic systems, with widespread increases in organic carbon (C), and declines in nitrogen (N) and phosphorus (P). Less well known is how these disturbances have affected nutrient stoichiometry, which may be a more useful metric to evaluate the health of aquatic ecosystems than individual nutrient concentrations. The Swedish west coast has historically experienced moderate to high levels of atmospheric deposition of sulfate and N, and eutrophication. In addition, coastal waters have been darkening with damaging effects on marine flora and fauna. Here, we present three decades of macronutrient data from twenty lakes and watercourses along the Swedish west coast, extending from headwaters to river mouths, across a range of land covers, and with catchments ranging 0.037-40,000 km(2). We find a high degree of consistency between these diverse sites, with widespread increasing trends in organic C, and declines in inorganic N and total P. These trends in individual macronutrients translate into large stoichiometric changes, with a doubling in C:P, and increases in C:N and N:P by 50% and 30%, showing that freshwaters are moving further away from the Redfield Ratio, and becoming even more C rich, and depleted in N and P. Although recovery from atmospheric deposition is linked to some of these changes, land cover also appears to have an effect; lakes buffer against C increases, and decreases in inorganic N have been greatest under arable land cover. Our analysis also detects coherently declining P concentrations in small forest lakes; so called (and unexplained) "oligotrophication." Taken together, our findings show that freshwater macronutrient concentrations and stoichiometry have undergone substantial shifts during the last three decades, and these shifts can potentially explain some of the detrimental changes that adjacent coastal ecosystems are undergoing. Our findings are relevant for all European and North American waters that have experienced historically high levels of atmospheric deposition, and provide a starting point for understanding and mitigating against the trajectories of long-term change in aquatic systems