cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Stepwise methods can limit power for hypothesis tests of cross-level interactions
Creators: name: King, Kevin
name: Kim, Dale
name: McCabe, Connor
name: Lane, Sean
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: cross-level interaction
subject: moderation
subject: multilevel modeling
subject: power analysis

description: In multilevel models, stepwise methods are commonly used to test cross-level interactions, where a cluster level variable explains differences in the effect of an observation level variable on the outcome. Researchers often wish to establish that there is between cluster variance in slopes before testing whether an observed cluster level variable explains between cluster variance in slopes. In the stepwise method, between cluster slope variance (i.e. random slopes) is required before a cross-level interaction is tested. We argue that this requirement unnecessarily reduces the power to detect true cross-level interactions, because it imposes an unnecessary constraint on the power to detect valid interactions. In short, the stepwise approach would only be valid if the power to detect a slope variance (i.e. random slope) without the interaction term in the model is equal to the power to detect a fixed effect (i.e. the cross-level interaction). Using Monte Carlo simulations, we demonstrate that this is not the case. The power to detect a true interaction was especially low when the residual slope variance (i.e. variance unexplained by the interaction), the variance of the moderator, the number of observations per cluster, or the number of clusters was small. We recommend that researchers directly test interactions that are of interest, regardless of the presence of random slope variance.
MS Gr. class. c. 6 1532
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1674 col. 53. Philodemus, De rhetorica 2
Drawing by G.B. Malesci
Elaphoglossum lechlerianum T. Moore, Index Fil.
Creators: name: Kessler, Michael
name: Moran, Robbin C.
name: Mickel, John T.
name: Matos, Fernando B.
name: Smith, Alan R.
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Polypodiopsida
Polypodiales
Dryopteridaceae
Elaphoglossum
Elaphoglossum lechlerianum

description: Elaphoglossum lechlerianum (Mett.) T.Moore, Index Fil. 11. 1857. (Fig. 40A–F)
 Range: —Eastern Andean slope from Ecuador to Bolivia (CO, LP).
 Ecology: —Common; terrestrial and on fallen trunks, rarely epiphytic (mostly on trunk bases or thick, horizontal branches) in humid forests, mostly in low, fairly open forests with shallow soils such as on ridges and steep slopes where it may form dense colonies (Jones et al. 2011); unlike many other species of the genus often found fertile; (1000–)1750–2400(–2800) m.
 Notes: —In some specimens, the stomata are black and can be mistaken for glandular dots.
description: Published as part of Kessler, Michael, Moran, Robbin C., Mickel, John T., Matos, Fernando B. & Smith, Alan R., 2018, Prodromus of a fern flora for Bolivia. XXXV. Dryopteridaceae, pp. 448-450 in Phytotaxa 353 (1) on pages 448-450, DOI: 10.11646/phytotaxa.353.1.1, http://zenodo.org/record/13706233
Politics of Victimhood: The Rwandan Patriotic Front and Post-Genocide Identity Construction
Creators: name: Skutch, Sara H.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2016

description: While identity is an ever-evolving concept, this moment in the story of Rwandan identity is unique. It is dynamic. The government’s strict interpretation of Rwandan history and national identity frequently run counter to family histories and messages about ethnicity that Rwandans receive at home. The RPF is not widely seen as the inclusive party working to unify people that it tries to portray domestically, there is substantial
political suppression and fear that Rwandans associate with it. Without a safe space to explore the vital disparities surrounding their Rwandan identities and cultural backgrounds, a generation is being brought up mired in dissonance. The government’s biggest shortcoming is the belief that if they wait long enough, stick to their black and white interpretation of the genocide, and force people to adopt their agenda, violent antagonisms of the past can be buried in the ground with the older generations. They fail to realize the intergenerational effects of the genocide, the reminders of ethnicity that cannot be silenced, and the contradictions they are actively creating by continuing a political discourse of victimhood. It is unclear whether they will be successful in redefining Rwandaness, but it will take more than time, a new history curriculum, and a strong arm.
Public Perceptions of Disability
Creators: name: Lynn, Autumn
Publisher: name: Open Science Framework
Year: 2022

description: This study will look at how instances of public stigma are influenced by disability type in service dog handlers. Types of disability are organized into physical and visible, physical and invisible, and psychiatric and invisible, so that the reactions towards each type of service dog handler is being measured distinctly. In addition, three control vignettes with no service dogs are included for each disability type, in order to ensure it is the use of the service dog and the disability type, not only the disability type that is being measured.
Robustness of s-wave pairing symmetry in iron-based superconductors and its implications to fundamentals on magnetically-driven high temperature superconductivity
Creators: name: Hu, Jiangping
name: Yuan, Jing
Publisher: name: arXiv
Year: 2015
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Under the assumption that the superconducting state belongs to a single irreducible representation of lattice symmetry, we argue that the pairing symmetry in all measured iron-based superconductors is universally consistent with the A_{1g} s-wave. The robust s-wave pairing throughout the different families of iron-based superconductors at different doping regions signals two fundamental principles behind high T_c superconducting mechanisms: (1) the correspondence principle: the short range magnetic exchange interactions and the Fermi surfaces act collaboratively to achieve high T_c superconductivity and determine pairing symmetries; (2) the magnetic selection pairing rule: the superconductivity is only induced by the magnetic exchange couplings from the superexchange mechanism through cation-anion-cation chemical bondings. These principles explain why the unconventional high T_c superconductivity appears to be such a rare but robust phenomena with its strict requirement on electronic environment. The robust s-wave pairing also reveals that the current standard effective models with only onsite interactions are not sufficient and a minimum microscopic model must include strong nearest neighbor repulsive interactions resulted from the d-d direct bondings to serves as a s-wave symmetry stabilizer. Finally, the sign distribution of the superconducting order parameters in the reciprocal space is simply a consequence of the form factors given by the leading short-range pairings. The sign change of superconducting order parameters on Fermi surfaces is not a necessary requirement in repulsive-interaction-driven high T_c mechanism. The results will guide us to search for new electronic structure that supports high T_c superconductivity.
description: 9 pages
StarBench: The D-type expansion of an HII region
Creators: name: Bisbas, T. G.
name: Haworth, T. J.
name: Williams, R. J. R.
name: Mackey, J.
name: Tremblin, P.
name: Raga, A. C.
name: Arthur, S. J.
name: Baczynski, C.
name: Dale, J. E.
name: Frostholm, T.
name: Geen, S.
name: Haugboelle, T.
name: Hubber, D.
name: Iliev, I. T.
name: Kuiper, R.
name: Rosdahl, J.
name: Sullivan, D.
name: Walch, S.
name: Wuensch, R.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: StarBench is a project focused on benchmarking and validating different star-formation and stellar feedback codes. In this first StarBench paper we perform a comparison study of the D-type expansion of an HII region. The aim of this work is to understand the differences observed between the twelve participating numerical codes against the various analytical expressions examining the D-type phase of HII region expansion. To do this, we propose two well-defined tests which are tackled by 1D and 3D grid- and SPH- based codes. The first test examines the `early phase' D-type scenario during which the mechanical pressure driving the expansion is significantly larger than the thermal pressure of the neutral medium. The second test examines the `late phase' D-type scenario during which the system relaxes to pressure equilibrium with the external medium. Although they are mutually in excellent agreement, all twelve participating codes follow a modified expansion law that deviates significantly from the classical Spitzer solution in both scenarios. We present a semi-empirical formula combining the two different solutions appropriate to both early and late phases that agrees with high-resolution simulations to $\lesssim2\%$. This formula provides a much better benchmark solution for code validation than the Spitzer solution. The present comparison has validated the participating codes and through this project we provide a dataset for calibrating the treatment of ionizing radiation hydrodynamics codes.
description: 20 pages, 12 Figures, 4 Tables. Accepted for publication in MNRAS. Comments are welcome. Participation in future StarBench tests is also welcome
MS Gr. class. c. 6 1533
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1674 col. 54. Philodemus, De rhetorica 2
Drawing by G.B. Malesci
The Impartial Community: Aristotle and Rawls on Economic Inequality
Creators: name: Parker, Paul
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2015

description: Too often, dialogue on economic inequality fails to seriously consider the moral implications of economic inequality. This is unfortunate, because a conversation that does not situate economic inequality within a broader moral and political perspective must inevitably devolve to narrowly-tailored conceptions of economic welfare and growth or, worse still, unreasoned anxieties about too much or too little inequality. This intellectual impoverishment does not owe to a lack of thinking on this subject; economic inequality has fascinated political, economic, and philosophical thinkers for millennia. Two such thinkers are Aristotle and John Rawls.
Most scholarship quite correctly views these thinkers as representing – perhaps even epitomizing – two separate and fundamentally different approaches to philosophy. For good reason: their respective accounts of virtue, metaphysics, history, science, and religion differ enormously. But on this subject, I argue, the two have a common framework for evaluating inequality. This similarity has much to tell us about the two thinkers – but so do their differences in motivation for and application of their common ideas.
This paper’s claim is that Rawls and Aristotle both assert that impartiality – the ability to understand another’s perspective, and weigh all perspectives equally – is necessary to navigate inequality in the allocation of social goods. Moreover, they both understand successful political
communities to be ones in which society’s members understand each other’s perspective, and accept the broader logic upon which society and its allocation of goods is based.
MS Gr. class. c. 6 1534
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1674 col. 55. Philodemus, De rhetorica 2
Drawing by G.B. Malesci
Negative urgency is correlated with the use of reflexive and disengagement emotion regulation strategies
Creators: name: King, Kevin
name: Feil, Madison
name: Halvorson, Max
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: coping
subject: ecological momentary assessment
subject: emotion regulation
subject: negative urgency
subject: personality

description: Negative urgency predicts both internalizing and externalizing psychopathology. Although it is hypothesized that urgency is characterized by reflexive responses to negative emotion that focus on immediate relief from distress, little research has addressed this hypothesis. Using data from four independent samples of adolescents and college students (n=1,268), we estimated the association between trait negative urgency and emotion regulation strategies that reflect either reflexive responses or disengagement. We verified these effects in two samples ecological momentary assessments (EMA) (n=198). In retrospective data, negative urgency was correlated with using more disengagement or reflexive emotion regulation strategies relative to engagement strategies (r=.39; .38, 95% CI =0.30–0.49; 0.18–0.57). This finding replicated in EMA data (r=.24, 95% CI =0.11–0.38). Emotion regulation may be a key mechanism of the effects of urgency on psychopathology. Interventions targeting emotion regulation among those high on urgency may be warranted.
Exploring Early Sport Specialization: Associations with Physical and Psychosocial Health Outcomes
Creators: name: Waldron, Shelby
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2018

description: Despite the current specialization trend in American youth sport and growing number of cautionary position statements from major medical organizations, limited specialization research exists, especially in regards to potential psychological outcomes and physical effects of early specialization (≤ age 12). Therefore, the current study examined associations among retrospective sport specialization and both retroactive and current psychological and physical health outcomes. In addition, based on previous theoretical and empirical findings, the potentially moderating role of athletes’ reasons for specialization was examined. 243 college-aged individuals completed an online survey of study variables. Early specializers reported significantly higher levels of multiple maladaptive outcomes (e.g. global athlete burnout, emotional and physical exhaustion, sport devaluation, amotivation, and current sport-related injuries). However, athletes’ reasons for specialization influenced the relationship between specialization and health outcomes, with adaptive and maladaptive reasons associated with adaptive and maladaptive outcomes, respectively. Overall, findings suggest that the specialization environment, age of specialization, and athletes’ reasons for specialization are all critical factors in determining health and well-being outcomes. Findings also corroborate prominent position statements, as early specialization seems to carry increased health risks. Study findings inform the development of guidelines and recommendations to educate parents, coaches, and athletes, and interventions to positively impact the psychological experience of youth athletes.
Elaphoglossum madidiense M. Kessler & Mickel, Brittonia
Creators: name: Kessler, Michael
name: Moran, Robbin C.
name: Mickel, John T.
name: Matos, Fernando B.
name: Smith, Alan R.
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Polypodiopsida
Polypodiales
Dryopteridaceae
Elaphoglossum
Elaphoglossum madidiense

description: Elaphoglossum madidiense M.Kessler & Mickel, Brittonia 58(2): 108. 2006. (Fig. 5A–F)
 Range: —Endemic to Bolivia (LP).
 Ecology: —Rare; epiphytic in humid forests; 3450–3600 m.
 Notes: —Most similar to E. unduaviense, from which it differs in its smaller size (leaves 2–11 cm vs. 12–60 cm long); rhizomes 0.7–1 mm thick (vs. 1.5–3.5 mm); phyllopodia 3–5 mm long (vs. 12–25 mm); lanceolate blades (vs. linear-lanceolate); and presence of whitish, peltate, ovate scales on the adaxial blade surfaces.
description: Published as part of Kessler, Michael, Moran, Robbin C., Mickel, John T., Matos, Fernando B. & Smith, Alan R., 2018, Prodromus of a fern flora for Bolivia. XXXV. Dryopteridaceae, pp. 448-450 in Phytotaxa 353 (1) on pages 448-450, DOI: 10.11646/phytotaxa.353.1.1, http://zenodo.org/record/13706233
Quasinormal modes of extremal black holes
Creators: name: Richartz, Maurício
Publisher: name: arXiv
Year: 2015
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The continued fraction method (also known as Leaver's method) is one of the most effective techniques used to determine the quasinormal modes of a black hole. For extremal black holes, however, the method does not work (since, in such a case, the event horizon is an irregular singular point of the associated wave equation). Fortunately, there exists a modified version of the method, devised by Onozawa et al. [Phys. Rev. D 53, 7033 (1996)], which works for neutral massless fields around an extremal Reissner-Nordstrom black hole. In this paper, we generalize the ideas of Onozawa et al. to charged massless perturbations around an extremal Reissner-Nordstrom black hole and to neutral massless perturbations around an extremal Kerr black hole. Similarities and differences between the results of the original continued fraction method for near extremal black holes and the results of the new continued fraction method for extremal black holes are discussed.
description: v4: 16 pages, 9 figures. A mode stability analysis for extremal black holes has been included. Published in PRD
"I Cried in the Middle of the Bottom of Lenoir, and my Friends Were There": A discussion of exploitation, friendship, and culture at UNC
Creators: name: Fishman, Jayna
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2017

description: In this paper, I use friendship and social networks as a lens to discuss the effects of neoliberalization of the university on UNC undergraduates. I conducted interviews, participatory mapping, and a new visual research method I call “friend mapping” to learn about five UNC students’ experiences with friendship, classwork, conflicting narratives, and the increasing neoliberalization of their university. Through this research, I find that it is helpful to imagine undergraduates not only as consumers of education, but also as workers and products at their universities. Understanding their position in this way, we can talk about the ways university students are exploited and the strategies they employ to survive the extractive processes of their schools. We also see that Universities seek to incorporate these strategies into a sanitized narrative which will attract new students each year, but that by sharing and listening to their own stories, students can take back control of this narrative and find points of solidarity with others workers. Finally, I will discuss the shortcomings of academic research in discussions of friendship and intimacy, and provide suggestions of how the academy might overcome these failures and gain a clearer and more complete picture of the lives of university students and people in general.
MS Gr. class. c. 6 1535
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1674 col. 56. Philodemus, De rhetorica 2
Drawing by G.B. Malesci
Transportation and Risk Perceptions in Individuals Varying in Numeracy
Creators: name: Moore, Remi S.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2013

description: In medical settings, people often base their perceptions of risk on a mix of numeric and narrative information. Previous research has shown that narrative transportation, immersion in stories, is an effective persuasive technique, and that different representations of numbers may have different effects on risk perception. However, little research has examined individual differences as mediating factors for communication techniques. Furthermore, past research has only investigated the presence or absence of a narrative as a factor influencing risk, rather than the transportive qualities of the narrative. We investigated how individuals of varying numeracy (number literacy) and transportability (the general tendency to be immersed into stories) perceived risk when exposed to both numeric and narrative information. UNC undergraduates (N = 218) read about a fictional disease called photokeratitis in a 2 (narrative information: transporting or not) x 2 (risk: high or low) between subjects design. Participants then answered questions about their perceptions of the story itself, their risk perceptions, and their behavioral intentions. Objective numeracy did not have main or interactive effects on the primary variables, but subjective numeracy did affect responses. Specifically, in the low risk/low transportation conditions, those with high subjective numeracy estimated accurate risk for themselves, but in all other conditions reported similar risk as the low subjective numeracy group. The results suggest that those with higher subjective numeracy more accurately assess risk when compared with those with low subjective numeracy, but only when information is non-threatening and when they are not influenced by high quality narratives. This study suggests that subjective numeracy is important for health decisions only in specific contexts, suggesting that more research is needed in order to learn to accurately communicate risk to the public.
Parkinson's Progression Markers Initiative (PPMI) Prioritizes Enrollment of Individuals from Diverse and Underrepresented Populations
Creators: name: Dobkin, Rosanne
name: Kutler, Madeline
name: O'Grady, Alyssa
name: Kelliher, Caitlin
name: Greenwood, Kayleigh
name: Kuhl, Maggie
name: Fong, Serena
name: Mantri, Sneha
Publisher: name: Zenodo
Year: 2023
Subjects: PPMI
DEI
Diversity
Equity
Inclusion

description: Objective: To describe the goals and Year 1 initiatives of the Diversity, Equity, and Inclusion (DEI) taskforce of the Parkinson’s Progression Markers Initiative (PPMI). This poster was presented in the Movement Disorders Society Conference held in Copenhagen, Denmark in Sept 2023.
Geometric entropy and edge modes of the electromagnetic field
Creators: name: Donnelly, William
name: Wall, Aron C.
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We calculate the vacuum entanglement entropy of Maxwell theory in a class of curved spacetimes by Kaluza-Klein reduction of the theory onto a two-dimensional base manifold. Using two-dimensional duality, we express the geometric entropy of the electromagnetic field as the entropy of a tower of scalar fields, constant electric and magnetic fluxes, and a contact term, whose leading order divergence was discovered by Kabat. The complete contact term takes the form of one negative scalar degree of freedom confined to the entangling surface. We show that the geometric entropy agrees with a statistical definition of entanglement entropy that includes edge modes: classical solutions determined by their boundary values on the entangling surface. This resolves a longstanding puzzle about the statistical interpretation of the contact term in the entanglement entropy. We discuss the implications of this negative term for black hole thermodynamics and the renormalization of Newton's constant.
description: 41 pages, an extended version of arXiv:1412.1895
Elaphoglossum melancholicum Vareschi, Acta Bot. Venez.
Creators: name: Kessler, Michael
name: Moran, Robbin C.
name: Mickel, John T.
name: Matos, Fernando B.
name: Smith, Alan R.
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Polypodiopsida
Polypodiales
Dryopteridaceae
Elaphoglossum
Elaphoglossum melancholicum

description: Elaphoglossum melancholicum Vareschi, Acta Bot. Venez. 1: 109. 1966. (Fig. 24D–G)
 Range: — Venezuela to Bolivia (CO, LP).
 Ecology: —Fairly common; epiphytic with usually erect leaves in humid montane forests; (1400–) 2350–3750 m.
 Notes: —Very variable with respect to rhizome scale size, blade shape, and the angle at which the veins depart from the costae. It may represent more than one species, and detailed study of the variation of populations in the field is needed.
description: Published as part of Kessler, Michael, Moran, Robbin C., Mickel, John T., Matos, Fernando B. & Smith, Alan R., 2018, Prodromus of a fern flora for Bolivia. XXXV. Dryopteridaceae, pp. 448-450 in Phytotaxa 353 (1) on pages 448-450, DOI: 10.11646/phytotaxa.353.1.1, http://zenodo.org/record/13706233
Changes in Nutrition Environment Predict Changes in Child Diet Quality in Family Child Care Homes
Creators: name: Bowen, Mikayla
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2019

description: Family child care homes (FCCHs) are the second most common form of non-parental child care, yet tend to have limited nutrition regulations and high rates of overweight and obesity. Prior research indicates that the nutrition environments of FCCHs tend to be poor, but it is unclear how interventions on the various components of the environment can actually impact child diet quality. The current study uses data from the Keys intervention, a large double-blind randomized controlled trial which included 166 FCCH providers and 496 children aged 1.5-4 years, and which targeted provider health, nutrition and physical activity environments, and business practices. Nutrition environment is observed and quantified by the Environment and Policy Assessment and Observation (EPAO) tool, and child diet quality is observed and collected via the Diet Observation in Child Care (DOCC), quantified by the Healthy Eating Index-2010 (HEI). This study uses baseline and follow-up data to examine how changes in the nutrition environment can impact changes in child diet quality through the creation of linear regression models. In the intervention group, although changes in overall nutrition environment were not predictive, changes in the feeding environment sub-component were significantly predictive of changes in diet quality. This relationship strengthened when controlling for baseline diet quality. Overall, other aspects of the nutrition environment such as feeding environment are important for improving child diet quality rather than only improving foods provided.
Spin one matter fields
Creators: name: Napsuciale, M.
name: Rodríguez, S.
name: Ferro-Hernández, Rodolfo
name: Gómez-Ávila, Selim
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Spin-one matter fields are relevant both for the description of hadronic states and as potential extensions of the Standard Model. In this work we present a formalism for the description of massive spin-one fields transforming in the $(1,0)\oplus(0,1)$ representation of the Lorentz group, based on the covariant projection onto parity eigenspaces and Poincaré orbits. The formalism yields a constrained dynamics. We solve the constraints and perform the canonical quantization accordingly. This formulation uses the recent construction of a parity-based covariant basis for matrix operators acting on the $(j,0)\oplus(0,j) $ representations. The algebraic properties of the covariant basis play an important role in solving the constraints and allowing the canonical quantization of the theory. We study the chiral structure of the theory and conclude that it is not chirally symmetric in the massless limit, hence it is not possible to have chiral gauge interactions. However, spin-one matter fields can have vector gauge interactions. Also, the dimension of the field makes self-interactions naively renormalizable. Using the covariant basis, we classify all possible naively renormalizable self-interaction terms.
description: 20 pages, discussion of constraints in the coupled case, the classical massless limit and corresponding gauge invariance added in the new version to appear in Phys Rev D
MS Gr. class. c. 6 1536
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1674 col. 57. Philodemus, De rhetorica 2
Drawing by G.B. Malesci
The Athenian Assembly, the Sicilian Expedition, and Alcibiades
Creators: name: Winchester, Marshall
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2014

description: In this thesis, I will examine the dynamics of power between the Athenian assembly and the three generals assigned to positions of command in the Sicilian Expedition – Alcibiades, Nicias, and Lamachus – and attempt to contextualize Alcibiades’ defecting from Athens to Sparta. I focus on the Sicilian Expedition narrative in Thucydides’ History of the Peloponnesian War Books 6 and 7, but also use Plutarch’s Life of Alcibiades and Life of Nicias, plus the Life of Coriolanus. In the first chapter, after discussing the sources, I examine the personal history of the commanders involved (the Athenians Alcibiades, Lamachus, and Nicias, and the Spartan Gylippus). In my second chapter, I then turn to the governmental structures and military customs of Athens, Sparta, and Sicily, zeroing in on the Athenian Assembly and its military role. In the third chapter, I briefly analyze several short speeches by Nicias and Alcibiades to the Athenian Assembly in Thucydides Books 6 and 7, and compare Thucydides with Plutarch’s Life of Alcibiades and Life of Nicias. Throughout, I concentrate on the communication between the Athenian generals and their Assembly, and compare this relationship to the one between the Spartan generals and their assembly (as well as the Syracusan commanders' dealings with the Syracusan assembly). I analyze the difficulties that Nicias faced in trying to lead the Sicilian expedition, and the differences between his approach from that of Gylippus – and the differing results. In a brief fourth chapter, I argue that the Athenian assembly ruined its leadership through excessive interference, whereas Sparta allowed relative autonomy to generals,
and Syracusan commanders had flexible, realistic relations with that city’s assembly. I will conclude that argue that Alcibiades was justified in defecting to Sparta because of the flawed system in which he was forced to operate at Athens, a city that did not appreciate his talents and skills. In a short appendix, I include a chronology of the Sicilian expedition to assist the reader in placing these events in context.
The Systematic Properties of the Warm Phase of Starburst-Driven Galactic Winds
Creators: name: Heckman, Timothy M.
name: Alexandroff, Rachel M.
name: Borthakur, Sanchayeeta
name: Overzier, Roderik
name: Leitherer, Claus
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Using ultra-violet absorption-lines, we analyze the systematic properties of the warm ionized phase of starburst-driven winds in a sample of 39 low-redshift objects that spans broad ranges in starburst and galaxy properties. Total column densities for the outflows are $\sim$10$^{21}$ cm$^{-2}$. The outflow velocity (v$_{out}$) correlates only weakly with the galaxy stellar mass (M$_*$), or circular velocity (v$_{cir}$), but strongly with both SFR and SFR/area. The normalized outflow velocity (v$_{out}/v_{cir}$) correlates well with both SFR/area and SFR/M$_*$. The estimated outflow rates of warm ionized gas ($\dot{M}$) are $\sim$ 1 to 4 times the SFR, and the ratio $\dot{M}/SFR$ does not correlate with v$_{out}$. We show that a model of a population of clouds accelerated by the combined forces of gravity and the momentum flux from the starburst matches the data. We find a threshold value for the ratio of the momentum flux supplied by the starburst to the critical momentum flux needed for the wind to overcome gravity acting on the clouds ($R_{crit}$). For $R_{crit} >$ 10 (strong-outflows) the outflow momentum flux is similar to the total momentum flux from the starburst and the outflow velocity exceeds the galaxy escape velocity. Neither is the case for the weak-outflows ($R_{crit}
description: Accepted for publication in ApJ. Contains 16 pages, 11 figure, and 2 tables
CophiEditor A collaborative web platform for the creation of scholarly digital editions
Creators: name: Zenzaro, Simone
name: Del Grosso, Angelo Mario
name: Boschetti, Federico
Publisher: name: Zenodo
Year: 2023
Subjects: Digital Humanities
Digital Papyrology
885222-GreekSchools
Computational Philology
GreekSchools
CNR-ILC

description: Digital Scholarly Platform for the in-progress editing within the GreekSchools project.
A high-order positivity-preserving single-stage single-step method for the ideal magnetohydrodynamic equations
Creators: name: Christlieb, Andrew J.
name: Feng, Xiao
name: Seal, David C.
name: Tang, Qi
Publisher: name: arXiv
Year: 2015
Subjects: subject: Numerical Analysis (math.NA)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 35L65, 65M06, 76W05

description: We propose a high-order finite difference weighted ENO (WENO) method for the ideal magnetohydrodynamics (MHD) equations. The proposed method is single-stage, single-step, maintains a discrete divergence-free condition on the magnetic field, and has the capacity to preserve the positivity of the density and pressure. To accomplish this, we use a Taylor discretization of the Picard integral formulation (PIF) of the finite difference WENO method proposed in [SINUM, 53 (2015), pp. 1833--1856], where the focus is on a high-order discretization of the fluxes (as opposed to the conserved variables). We use the version where fluxes are expanded to third-order accuracy in time, and for the fluid variables space is discretized using the classical fifth-order finite difference WENO discretization. We use constrained transport in order to obtain divergence-free magnetic fields, which means that we simultaneously evolve the magnetohydrodynamic and magnetic potential equations, and set the magnetic field to be the (discrete) curl of the magnetic potential after each time step. In this work, we compute these curls to fourth-order accuracy. In order to retain a single-stage, single-step method, we develop a novel Lax-Wendroff discretization for the evolution of the magnetic potential, where we start with technology used for Hamilton-Jacobi equations in order to construct a non-oscillatory magnetic field. Positivity preservation is realized by introducing a parameterized flux limiter that considers a linear combination of high and low-order numerical fluxes. This positivity limiter lacks energy conservation. However, this limiter can be dropped for problems where the pressure does not become negative. We present two and three dimensional numerical results for several standard test problems. These results assert the robustness and verify the high-order of accuracy of the proposed scheme.
Self-Sustained Oscillation and Dynamical Multistability of Optomechanical Systems in the Extremely-Large-Amplitude Regime
Creators: name: Gao, Ming
name: Lei, Fuchuan
name: Du, Chuanguang
name: Long, Gui Lu
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Optomechanics concerns with the coupling between optical cavities and mechanical resonators. Most early works are concentrated in the physics of optomechanics in the small-displacement regime and consider one single optical cavity mode participating in the optomechanical coupling. In this paper, we focus on optomechanics in the extremely-large-amplitude regime in which a mechanical resonator is coupled with multiple optical cavity modes during the oscillation. We explicitly show that the mechanical resonator can present self-sustained oscillations in a novel way with limit cycles in the shape of sawtooth-edged ellipses and exhibit dynamical multistability. By analyzing the mechanical oscillation process and the accompanied variation of the optical cavity occupation, we develop an energy-balanced condition to ensure the stability of self-sustained oscillation. The effect of the mechanical nonlinearities on the dynamics of the mechanical resonator is also investigated.
description: 8 pages, 6 figures. arXiv admin note: text overlap with arXiv:1506.05611
Discovering, Embracing, and Using Black Female Spirituality: A Journey through Twentieth Century African American Literature from Alice Walker, Gloria Naylor, and Zora Neale Hurston
Creators: name: Robertson, Shelby
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2018

description: This thesis analyzes the works of Alice Walker, Gloria Naylor, and Zora Neale Hurston and focuses specifically on each author’s exploration of black women’s spirituality as a means of black female power within her work. Throughout my thesis, I choose to use the phrase “black women’s spirituality” to define my scope of exploring the use of spiritualty in the lives of black female characters in Walker, Naylor, and Hurston’s works more clearly. Within The Color Purple, I analyze Walker’s exploration of black women’s spirituality through its ability to provide Celie with healing from her past, transcendence from her identity as an object for men, and the power to understand her worth as a woman deserving of pleasure and love. Within Mama Day, I analyze Naylor’s exploration of black women’s spirituality through her emphasis on the importance of Mama Day’s embracing her matrilineal heritage and the power that comes with Mama Day’s openness to ways of understanding that extend outside the realm of logic. Finally, within Jonah’s Gourd Vine, I analyze Hurston’s portrayal of black women’s spirituality through a comparative relationship between Lucy and Hattie that demonstrates equitable power among varying sources of and connections to spirituality and argues for the definition of black women’s spirituality to be found in its use of their spirituality.
The stellar kinematics in the solar neighborhood from LAMOST data
Creators: name: Tian, Hai-Jun
name: Liu, Chao
name: Carlin, Jeffrey L.
name: Zhao, Yong-Heng
name: Chen, Xue-Lei
name: Wu, Yue
name: Li, Guang-Wei
name: Hou, Yong-Hui
name: Zhang, Yong
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We use about 200,000 FGK type main-sequence stars from the LAMOST DR1 data to map the local stellar kinematics. With the velocity de-projection technique, we are able to derive the averaged 3 dimensional velocity and velocity ellipsoids using only the line-of-sight velocity for the stars with various effective temperatures within $100 < |z| < 500$ pc. Using the mean velocities of the cool stars, we derive the solar motion of ($U_{\!\odot}$, $V_{\!\odot}$, $W_{\!\odot}$)=(9.58$\pm2.39$, 10.52$\pm1.96$, 7.01$\pm1.67$)$km\,s^{-1}$ with respect to the local standard of rest. Moreover, we find that the stars with ${T}_{\rm eff}>6000$K show a net asymmetric motion of $\sim3 km\,s^{-1}$ in $\langle W\rangle$ compared to the stars with ${T}_{\rm eff}<6000$K. And their azimuthal velocity increases when $|z|$ increases. This peculiar motion in the warmer stars is likely because they are young and not completely relaxed, although other reasons, such as the resonance induced by the central rotating bar or the spiral structures, and the perturbation of the merging dwarf galaxies, can not be ruled out. The derived velocity dispersions and cross terms for the data are approximately consistent with previous studies. We also find that the vertical gradients of $σ_{U}$ and $σ_V$ are larger than that of $σ_W$ . And the vertical gradient of $σ_U$ shows clear correlation with ${T}_{\rm eff}$, while the other two do not. Finally, our sample shows vertex deviation of about 11$^\circ$, at $300 < |z| < 500$pc, but roughly zero at $100 < |z| < 300$pc.
description: 17 pages, 13 figures, 8 tables, accepted by ApJ
MS Gr. class. c. 6 1537
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1674 col. 58. Philodemus, De rhetorica 2
Drawing by G.B. Malesci
Elaphoglossum odontolepis Mickel, Fieldiana, Bot.
Creators: name: Kessler, Michael
name: Moran, Robbin C.
name: Mickel, John T.
name: Matos, Fernando B.
name: Smith, Alan R.
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Polypodiopsida
Polypodiales
Dryopteridaceae
Elaphoglossum
Elaphoglossum odontolepis

description: Elaphoglossum odontolepis Mickel, Fieldiana, Bot., n.s., 27: 150. 1991. (Fig. 24H–K)
 Range: —Central Peru to Bolivia (CO, LP).
 Ecology: —Rare; epiphytic in humid forests; 3100–4000 m.
 Notes: —The black blade scales are reminiscent of E. productum, but that species has thicker rhizomes and smaller, thinner-textured blade scales. Intermediate between the groups of E. glossophyllum (with slender, creeping rhizomes) and E. andicola (with large, coriaceous blades).
description: Published as part of Kessler, Michael, Moran, Robbin C., Mickel, John T., Matos, Fernando B. & Smith, Alan R., 2018, Prodromus of a fern flora for Bolivia. XXXV. Dryopteridaceae, pp. 448-450 in Phytotaxa 353 (1) on pages 448-450, DOI: 10.11646/phytotaxa.353.1.1, http://zenodo.org/record/13706233
Clinical Progression in Males and Females with Early Treatment-Naive Parkinson's Disease
Creators: name: Kassuba, Tanja
name: Ribba, Benjamin
name: Simuni, Tanya
name: Marek, Kenneth
name: Siderowf, Andrew
name: Chahine, Lana
name: Picillo, Marina
name: Brundin, Patrik
name: Pagano, Gennaro
Publisher: name: Zenodo
Year: 2023
Subjects: PPMI
Early Treatment-Naive Parkinson's Disease
Parkinson's Disease

description: Objective: To investigate differences in the progression of motor and non-motor symptoms and striatal degeneration between males and females with PD, using data from the Parkinson’s Progressive Markers Initiative (PPMI). This poster was presented in the Movement Disorders Society Conference held in Copenhagen, Denmark in Sept 2023.
Constraints on Majorana Dark Matter from the LHC and IceCube
Creators: name: Heisig, Jan
name: Krämer, Michael
name: Pellen, Mathieu
name: Wiebusch, Christopher
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We consider a simplified model for Majorana fermion dark matter and explore constraints from direct, indirect and LHC collider searches. The dark matter is assumed to couple to the Standard Model through a vector mediator with axial-vector interactions. We provide detailed analyses of LHC mono-jet searches and IceCube limits on dark matter annihilation in the Sun. In particular, we develop a method for calculating limits on simplified WIMP dark matter models from public IceCube data, which are only available for a limited number of Standard Model final states. We demonstrate that LHC and IceCube searches for Majorana dark matter are complementary and derive new limits on the dark matter and mediator masses, including in addition constraints from LHC di-jet searches, direct detection and the dark matter relic density.
description: 14 pages + references, 7 figures; v2: Updated according to improved IceCube analysis, matches published version
Mediators of NSSI History and Severity: Considering Automatic Functions and NSSI Ideation
Creators: name: Sasiela, William Jordan
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2014

description: Non-suicidal self-injury (NSSI) is increasingly becoming an issue among adolescent populations. As such, there is a growing need for an understanding of the phenomenon, as well as knowledge of potential risk factors. Prior research has found certain relationships between the severity of NSSI and its history, functions, and ideation. The current study extends upon this research by looking at NSSI ideation and NSSI functions as possible mediators in the relationship between NSSI history and severity. 97 adolescent females were tested via written interview using self-report. Data were collected and analyzed via multiple regression and bootstrapping mediation models. Results indicated that automatic positive functions serve as a significant mediator in the relationship between NSSI duration and recent frequency, and may partially mediate the relationship between NSSI duration and number of methods. No significant relationships were found for NSSI ideation time. From this information we can conclude that automatic positive functions play a distinct role in explaining the increase in severity across longer histories of NSSI. Therefore they could potentially be targeted directly for treatment and prevention models in future studies.
Thermoelectric Transport Coefficients in Mono-layer MoS2 and WSe2 Role of Substrate, Interface Phonons, Plasmon, and Dynamic Screening
Creators: name: Ghosh, Krishnendu
name: Singisetti, Uttam
Publisher: name: arXiv
Year: 2015
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The thermoelectric transport coefficients of electrons in two recently emerged transition metal dichalcogenides(TMD), MoS2 and WSe2, are calculated by solving Boltzmann Transport equation and coupled electrical and thermal current equations using Rode iterative technique. Scattering from localized donor impurities, acoustic deformation potential, longitudinal optical (LO) phonons, and substrate induced remote phonon modes are taken into account. Hybridization of TMD plasmon with remote phonon modes is investigated. Dynamic screening under linear polarization response is explored in TMDs sitting on a dielectric environment and the screened electron-phonon coupling matrix elements are calculated. The effect of screening and substrate induced remote phonon mediated scattering on the transport coefficients of the mentioned materials is explained. The transport coefficients are obtained for a varying range of temperature and doping density for three different types of substrates SiO2, Al2O3, and HfO2. The thermoelectric properties of interest including Seebeck coefficient, Peltier coefficient, and electronic thermal conductivity are calculated.
ambgoals1
Creators: name: Navon, Mayan
name: Bar-Anan, Yoav
name: Lab, Bar-Anan
Publisher: name: Open Science Framework
Year: 2022

description: The purpose of this research project is to examine what factors facilitate the formation of stronger bivalent mental associations – associations of one object with both positive and negative valence. In the present line of research, I am testing what mindsets or processing goals facilitate the formation of stronger bivalent associations.