cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Spitzer Microlensing Program as a Probe for Globular Cluster Planets. Analysis of OGLE-2015-BLG-0448
Creators: name: Poleski, Radosław
name: Zhu, Wei
name: Christie, Grant W.
name: Udalski, Andrzej
name: Gould, Andrew
name: Bachelet, Etienne
name: Skottfelt, Jesper
name: Novati, Sebastiano Calchi
name: Szymański, M. K.
name: Soszyński, I.
name: Pietrzyński, G.
name: Wyrzykowski, Ł.
name: Ulaczyk, K.
name: Pietrukowicz, P.
name: Kozłowski, Szymon
name: Skowron, J.
name: Mróz, P.
name: Pawlak, M.
name: Beichman, C.
name: Bryden, G.
name: Carey, S.
name: Fausnaugh, M.
name: Gaudi, B. S.
name: Henderson, C. B.
name: Pogge, R. W.
name: Shvartzvald, Y.
name: Wibking, B.
name: Yee, J. C.
name: Beatty, T. G.
name: Eastman, J. D.
name: Drummond, J.
name: Friedmann, M.
name: Henderson, M.
name: Johnson, J. A.
name: Kaspi, S.
name: Maoz, D.
name: McCormick, J.
name: McCrady, N.
name: Natusch, T.
name: Ngan, H.
name: Porritt, I.
name: Relles, H. M.
name: Sliski, D. H.
name: Tan, T. -G.
name: Wittenmyer, R. A.
name: Wright, J. T.
name: Street, R. A.
name: Tsapras, Y.
name: Bramich, D. M.
name: Horne, K.
name: Snodgrass, C.
name: Steele, I. A.
name: Menzies, J.
name: Jaimes, R. Figuera
name: Wambsganss, J.
name: Schmidt, R.
name: Cassan, A.
name: Ranc, C.
name: Mao, S.
name: Bozza, V.
name: Dominik, M.
name: Hundertmark, M. P. G.
name: Jørgensen, U. G.
name: Andersen, M. I.
name: Burgdorf, M. J.
name: Ciceri, S.
name: D'Ago, G.
name: Evans, D. F.
name: Gu, S. -H.
name: Hinse, T. C.
name: Kains, N.
name: Kerins, E.
name: Korhonen, H.
name: Kuffmeier, M.
name: Mancini, L.
name: Popovas, A.
name: Rabus, M.
name: Rahvar, S.
name: Rasmussen, R. T.
name: Southworth, G. Scarpetta J.
name: Surdej, J.
name: Unda-Sanzana, E.
name: Verma, P.
name: von Essen, C.
name: Wang, Y. -B.
name: Wertz, O.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The microlensing event OGLE-2015-BLG-0448 was observed by Spitzer and lay within the tidal radius of the globular cluster NGC 6558. The event had moderate magnification and was intensively observed, hence it had the potential to probe the distribution of planets in globular clusters. We measure the proper motion of NGC 6558 ($μ_{\rm cl}$(N,E) = (+0.36+-0.10, +1.42+-0.10) mas/yr) as well as the source and show that the lens is not a cluster member. Even though this particular event does not probe the distribution of planets in globular clusters, other potential cluster lens events can be verified using our methodology. Additionally, we find that microlens parallax measured using OGLE photometry is consistent with the value found based on the light curve displacement between Earth and Spitzer.
description: ApJ submitted, 12 pages, 8 figures, 2 tabels
Ambivalent Americanism: U.S. Literary Modernism in France and Algeria after 1940
Creators: name: Du Graf, Lauren
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2016

description: This dissertation reveals how French and Algerian writers and filmmakers, from the onset of World War II to the present, have mined American literary modernist texts for the language with which to confront a range of societal and political injustices – including racism, sexism, colonialism, and war – witnessed at home. Writers and filmmakers from the Hexagon to the Maghreb have repurposed American modernist writing, from the fiction of William Faulkner to the novels of Chester Himes, to address French and Algerian social and political concerns from the Nazi occupation to the 1990s Algerian civil war. This decades-long phenomenon, I argue, gained traction during the politicization of American literary modernism during and after the dark years of Nazi occupation and Vichy collaboration, when works by U.S. writers acquired cult status as banned objects in both France and Algeria. From underground resistance magazines produced under Nazi occupation to to post-Algerian independence cinema, I show how the work of American modernist writers has been discursively mobilized at critical moments of renegotiating French and Algerian cultural identity. The durability of U.S. literary modernism in the French-speaking literary and cinematic productions also reflects what I call an ambivalent Americanism; while French-language engagement with the texts of U.S. modernist writers reflects an admiration for American cultural innovation and empathy towards a series of mutually felt historical, cultural and political crises, this interest also reveals a posture of critique and at times condescension towards the dark side of the United States as rendered in literary expressions of violence, anti-black racism, mass incarceration, capitalism, and poverty.
Getting the story straight: newspaper reporters’ decision making processes in coverage of same-sex marriage at The (Durham) Herald-Sun and The (Raleigh) News & Observer
Creators: name: Camblos, Grace Zehnder
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2006

description: This study examines framing choices made by journalists at The (Durham, N.C.) Herald-Sun and The (Raleigh, N.C.) News & Observer in coverage of same-sex marriage between January 1, 2004 and March 1, 2005. This study uses as its starting point a qualitative content analysis that found same-sex marriage articles in The News & Observer tended to use a conflict frame, while articles at The Herald-Sun used an LGBT-celebratory frame. In this study, in-depth interviews were conducted with journalists from each paper who wrote or edited stories about same-sex marriage. Journalists were asked about their decision-making processes to determine why certain frames were used at each newspaper. While “news culture” factors such as news routines influenced perception of same-sex marriage as a conflict story at both newspapers, factors at the organizational level, such as newspaper resources and locations, ultimately had the most effect on framing.
On the representation of integers by binary forms
Creators: name: Stewart, C. L.
name: Xiao, Stanley Yao
Publisher: name: arXiv
Year: 2016
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11E76, 11D57

description: Let $F$ be a binary form with integer coefficients, non-zero discriminant and degree $d$ with $d$ at least $3$. Let $R_F(Z)$ denote the number of integers of absolute value at most $Z$ which are represented by $F$. We prove that there is a positive number $C_F$ such that $R_F(Z)$ is asymptotic to $C_F Z^{\frac{2}{d}}$.
description: 26 pages, revised version
Las Dos Españas: Spanish political nationalism since the democratic transition
Creators: name: Lapar, Adrianne J.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2008

description: This paper traces the evolution of Spanish political nationalism since the country's democratic transition. By examining the nationalist discourses of Spain's two main political parties, the Partido Socialista Obrero Español (PSOE) and the Partido Popular (PP), this paper identifies historic trends, ideological and philosophical influences, and sources of division within each party. The author argues that each party's respective discourse has been shaped by four factors: historians' interpretations of Spain's national identity and past; political alignment on the Left or Right; whether the party belongs to the government or the opposition; and the degree of reliance on peripheral nationalist parties for electoral success. This paper contributes to the debate about the existence of Spanish political nationalism, as well as to the wider literature on nationalism and European politics.
Comparison of the Calabi and Mabuchi geometries and applications to geometric flows
Creators: name: Darvas, Tamás
Publisher: name: arXiv
Year: 2016
Subjects: subject: Differential Geometry (math.DG)
subject: Complex Variables (math.CV)
subject: Metric Geometry (math.MG)
subject: FOS: Mathematics

description: Suppose $(X,ω)$ is a compact Kähler manifold. We introduce and explore the metric geometry of the $L^{p,q}$-Calabi Finsler structure on the space of Kähler metrics $\mathcal H$. After noticing that the $L^{p,q}$-Calabi and $L^{p'}$-Mabuchi path length topologies on $\mathcal H$ do not typically dominate each other, we focus on the finite entropy space $\mathcal E^{Ent}$, contained in the intersection of the $L^p$-Calabi and $L^1$-Mabuchi completions of $\mathcal H$ and find that after a natural strengthening, the $L^p$-Calabi and $L^1$-Mabuchi topologies coincide on $\mathcal E^{Ent}$. As applications to our results, we give new convergence results for the Kähler--Ricci flow and the weak Calabi flow.
description: v2 Final version. References added
Mortuary variability in early iron age Cretan burials
Creators: name: Eaby, Melissa Suzanne
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2007

description: The Early Iron Age (c. 1200-700 B.C.) on Crete is a period of transition, comprising the years after the final collapse of the palatial system in Late Minoan IIIB up to the development of the polis, or city-state, by or during the Archaic period. Over the course of this period, significant changes occurred in settlement patterns, settlement forms, ritual contexts, and most strikingly, in burial practices. Early Iron Age burial practices varied extensively throughout the island, not only from region to region, but also often at a single site; for example, at least 12 distinct tomb types existed on Crete during this time, and both inhumation and cremation were used, as well as single and multiple burial. As part of this study, over 1200 tombs found in the vicinity of 122 modern villages or towns have been catalogued. An examination of the burial methods, architecture, assemblages, dates, and spatial contexts of these tombs and cemeteries provides significant new evidence regarding the extent of cultural diversity present on the island during this period. The funerary evidence clearly indicates that Crete was characterized by extensive regionalism during the Early Iron Age; seven distinct mortuary regions, as well as four transitional or ‘border’ zones, are identified from the funerary material. In addition, a regional examination of the burial practices provides new evidence regarding the changes in political organization and social structure which occurred on the island over the course of the period.
title: Presidential-Congressional relations during the Kennedy administration
Creators: name: Hart, John
Publisher: name: University of Kent
Year: 2022

description: This study examines the relationship between President John P. Kennedy and the United States Congress focusing on the institutional arrangements through which the President conducted that relationship and the strategic decisions he made regarding his overall approach to Congress. It does so within the context of the literature of political science which tradition­ally stresses the conflict between the two branches, but this analysis argues that attention ought to be given to the co-operative features of Presidential-Congressional relations. Indeed, it notes that some of the institutional developments under Kennedy closely resemble the reform proposals advocated by many political scientists in this area. The concept of Congressional liaison is used to identify the various components of Kennedy's systematic approach to Congress. This study pays particular attention to the establishment and operation of the White House Office of Congressional Relations; the legislative leadership meetings; the links between the White House and the rank-and-file Congressmen, and the workings of the White House staff system. The historical context is noted in each case. The study then explores the legislative strategy developed by President Kennedy through an analysis of six specific policy areas to which the President had made legislative committments. It traces the outcome of these proposals in Congress in order to identify the nature of Congressional opposition to the New Frontier legislative programme. It notes that, crucial to every item, was the position of the southern Democrats and their potential voting alliance with the Republicans to form a conservative coalition to oppose the Kennedy proposals. Kennedy's legislative strategy was directed towards reducing the potential strength of this block. The final chapter argues that judgements about Presidential legislative leadership ought to take into account the efforts made by a President to enhance his chances of success on Capitol Hill and the nature of the opposition he has to encounter. Particular attention is given to the position of the southern Democrats during the Kennedy years. It is suggested that this is a more fruitful approach to the study of Presidential-Congressional relations than what has been identified as 'the balance-sheet' mode of analysis which concentrates primarily on overall wins and losses. It is further argued that, when viewed in this context, conventional wisdom about President Kennedy's performance as a legislative leader is in need of some adjustment. The outcome of his most significant proposals do not justify marking his leadership as a failure and the developments in Presidential-Congressional relations during his administrations are held to be innovatory.
Hopf Algebroid Twists for Deformation Quantization of Linear Poisson Structures
Creators: name: Škoda, Zoran
name: Meljanac, Stjepan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Algebra (math.QA)
subject: Mathematical Physics (math-ph)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 53D55, 16S30, 16T05

description: In our earlier article [Lett. Math. Phys. 107 (2017), 475-503, arXiv:1409.8188], we explicitly described a topological Hopf algebroid playing the role of the noncommutative phase space of Lie algebra type. Ping Xu has shown that every deformation quantization leads to a Drinfeld twist of the associative bialgebroid of h-adic series of differential operators on a fixed Poisson manifold. In the case of linear Poisson structures, the twisted bialgebroid essentially coincides with our construction. Using our explicit description of the Hopf algebroid, we compute the corresponding Drinfeld twist explicitly as a product of two exponential expressions.
Classification of joint numerical ranges of three hermitian matrices of size three
Creators: name: Szymański, Konrad
name: Weis, Stephan
name: Życzkowski, Karol
Publisher: name: arXiv
Year: 2016
Subjects: subject: Functional Analysis (math.FA)
subject: Mathematical Physics (math-ph)
subject: Metric Geometry (math.MG)
subject: Quantum Physics (quant-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 47A12 (Primary) 47L07, 52A20, 52A15, 52B05, 05C10 (Secondary)

description: The joint numerical range $W(F)$ of three hermitian $3$-by-$3$ matrices $F=(F_1,F_2,F_3)$ is a convex and compact subset in $\mathbb{R}^3$. Generically we find that $W(F)$ is a three-dimensional oval. Assuming $\dim(W(F))=3$, every one- or two-dimensional face of $W(F)$ is a segment or a filled ellipse. We prove that only ten configurations of these segments and ellipses are possible. We identify a triple $F$ for each class and illustrate $W(F)$ using random matrices and dual varieties.
description: 23 pages, 4 figures. This version includes some minor improvements which could not be taken into account in the proofs of the published version
Evaluations of Public Health Policies on Disadvantaged Populations
Creators: name: Dong, Zheyuan
Publisher: name: University of Illinois at Chicago
Year: 2023

description: This thesis is composed of two chapters in economics of healthcare. In these two chapters I use empirical econometrics methods to evaluate policy effects in two areas where disadvantaged populations exist as major stakeholders: formal long-term care and the opioid crisis in U.S. In the first chapter I study the relationship between nursing home's staff composition and the preference for patient types. Nursing homes rely on intensive nursing staff labor to provide long-term care services for the elder population across the U.S. However, the relationship between a nursing home’s permanent staff level and its preferred patient type remains under-studied. In this paper, I approach this question by leveraging state-level policy prohibiting the assignment of mandatory overtime shifts among nurses as an exogenous shock to nursing homes' ability to use flexible labor input. I find an approximately 10 percent reduction in total nursing hours provided by permanent nursing staff among nursing homes in treated states, suggesting an increase in the usage of contract nurses and nursing homes’ persistent need for labor flexibility. I also found a weak but statistically significant increase in the share of Medicaid patients at around 1.4 percent, consistent with my hypothesis that nursing homes switch to more predictable, longer-staying patients as the profit gap become narrowed by the increase in the cost of flexible labor input. My results highlight the impact of health providers’ staff choice set on the corresponding patient preferences. Policymakers should account for this linkage that could induce side effects for labor regulations on the health market. In the second chapter me and my coauthor Meiqing Ren study the unintended impact of supply-side policy interventions for opioid crisis in United States. Since early 2010, the fastly rising number of overdose deaths from illicit drugs including heroin and fentanyl has raised wide debate on effectiveness of contemporary supply-side policy interventions restricting access to prescription opioids. Meanwhile, the mechanism connecting reduced prescription opioids in the legal sector and increased usage of illicit drugs on black market remains unclear. We document the increase in street market purchases as a potential transitional phase to illicit drugs. Leveraging hydrocodone component products (HCPs) rescheduling in 2014 as a quasi-experimental negative shock to prescriptions supply, we find substantial increase in HCPs purchase on the street market following the policy. We find weak impacts on total drug overdose deaths and pain management quality following the policy, suggesting that intended welfare gain may be offsetted by damage to marginal populations heavily dependent on HCPs. Policy makers should note the limited effectiveness of similar supply-side interventions in absence of complementing efforts to reduce patients' demand.
An Examination of the Legal and Policy Contexts Governing Access to Public School Resources for Homeschooled Students in Wake County, North Carolina
Creators: name: Roulhac, Gwen
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2016

description: Homeschooling continues to experience unprecedented growth across the United States, including in North Carolina. More than 2 million children nationally and over 106,000 children in North Carolina are enrolled in homeschools. North Carolina’s original homeschool law had long been interpreted to mean that parents had to provide all academic instruction. North Carolina’s homeschool law was revised in 2013 such that parents are authorized to determine additional sources of academic instruction for their homeschooled children. Parents have sought access to public school resources as one such additional source of academic instruction. Homeschoolers’ access to public school resources is highly contextualized due to North Carolina’s “district discretion” policy. This qualitative case study aimed to understand how the legal and policy contexts at the state and local levels contributed to the accessibility of public school resources for homeschooled students in Wake County. Data for this study were generated through an analysis of the laws and policies governing homeschooled students’ access to public school resources. Additionally, individual interviews with 18 Wake County homeschool educators who had three or more years of homeschooling experience and who had homeschooled or were homeschooling a high school-age child revealed homeschool educators’ advocacy on behalf of their children, their interactions with public school administrators, and their selective use of public school resources. The researcher used social construction to analyze homeschool educators’ stories and to draw connections between shifts in policy and policymakers’ constructions of homeschoolers as a target group. The findings suggest that the passage of the revised homeschool law was mostly symbolic. The data also support the idea that the positive or negative constructions different policymakers held about homeschoolers have implications for both policy and practice. Policymakers as well as public school and homeschool educators and students have a vested interest in the implementation of policies that govern homeschooled students’ access to public school resources. Should local education policymakers in Wake County want to fill the policy vacuum that currently exists, the present study offers insights into which resources homeschool educators most desire and the extent to which homeschoolers would like to engage with public schools.
Rubin Observatory Town Hall AAS 241
Creators: name: Bianco, Federica
name: Blum. Robert
name: Deppe, Stephanie
name: Fonseca Alvarez, Gloria
name: Graham, Melissa
name: Ivezic, Zeljko
name: Krabbendam, Victor
name: Willman, Beth
Publisher: name: Zenodo
Year: 2023
Subjects: LSST
Rubin Observatory

description: Overview of Rubin Observatory at AAS 241
NIRS Calibration Model for Evaluating Boiled Yam Texture (Hardness) as a High Throughput Method
Creators: name: Emmanuel, Alamu
name: Michael, Adesokan
name: Segun, Fawole
name: Busie, Maziya-Dixon
Publisher: name: Zenodo
Year: 2023
Subjects: Boiled yam
Hardness
Standard Normal Variate Detrend
Texture

description: The calibration statistics for the NIRS prediction of the textural attribute (hardness) of the boiled yam. The development of NIRS prediction models for rapid evaluation of texture (a key quality trait) of boiled yam was reported in this document. Thirty yam genotypes ( TDr and TDa) harvested from the experimental field of IITA were used for the experiment. Boiled yam samples were prepared by boiling in a steam cooker for 20 minutes following a standardized operating procedures developed in the project. The instrumental hardness was determined using Stable Micro Systems TA.XTplus texture analyzer to generate reference data, while the NIRS spectra data was also collected using a NIRS spectrophotometer (FOSS XDS Rapid content analyzer). For the preprocessing of the spectra data, Standard Normal Variate Detrend (SNVD) and Savitzky Golay were used as mathematical treatments. Prediction model was later developed using a modified partial least square (MPLS) algorithm. The NIRS model developed had a good coefficient of determination in calibration (R2cal) of 0.97. Another set 10 samples were used to validate the model giving a coefficient of determination in prediction(R2pred) of 0.92. This experiment has shown that NIRS can rapidly predict the texture of boiled yam, making the technology applicable in yam breeding for routine screening for textural attributes of boiled yam.
Bayesian Nonparametric Differential Equation Models for Functions
Creators: name: Wheeler, Matthew W.
Publisher: name: University of North Carolina at Chapel Hill
Year: 2013

description: Bayesian nonparametric methods develop priors over a large class of functions that essentially allow any continuous function to be modeled. Though these methods are flexible, they are black box approaches that do not explicitly incorporate additional information on the shape of the curve. In many contexts, though the exact parametric form of the curve is unknown, additional scientific information is available in the form of differential operators. This dissertation develops nonparametric priors over function spaces that are specified by differential operators. Here two novel approaches to nonparametric function estimation are considered. In the first approach the prior is specified by a linear differential equation. The Mechanistic Hierarchical Gaussian process defines a prior over functions consistent with a differential operator. The method is applied to muscle force tracings in a functional ANOVA context, and is shown to adequately describe the between subject variability often seen in such tracings. In the second case a novel spline based approach is considered. Here prior information is specifies the maximum number of extrema (changepoints) for an arbitrary function located on an open set in R. The Local Extrema (LX) spline models the first derivative of the curve and puts a prior over the maximum number of changepoints. This method is applied to animal toxicology studies, human health surveys, and seasonal data; and it is shown to remove artifactual bumps common to other nonparametric methods. It is further shown to superior in terms of estimated squared error loss in simulation studies.
Uncovering the non-equilibrium phase structure of an open quantum spin system
Creators: name: Helmrich, S.
name: Arias, A.
name: Whitlock, S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We experimentally and theoretically investigate the non-equilibrium phase structure of a well-controlled driven-disspative quantum spin system governed by the interplay of coherent driving, spontaneous decay and long-range spin-spin interactions. We discover that the rate of population loss provides a convenient macroscopic observable that exhibits power-law scaling with the driving strength over several orders of magnitude. The measured scaling exponents reflect the underlying non-equilibrium phase structure of the many-body system, which includes dissipation-dominated, paramagnetic and critical regimes as well as an instability which drives the system towards states with high excitation density. This opens up a new means to study and classify quantum systems out of equilibrium and extends the domain where scale-invariant behavior may be found in nature.
description: 11 pages, 6 figures
Three essays on intellectual property rights and international technology transfer
Creators: name: Nedita, Codrin
Publisher: name: University of North Carolina at Chapel Hill
Year: 2010

description: Developing countries today face external pressures to implement stronger intellectual property rights (IPRs). These countries are in general characterized as imitators that learn from technology transferred from innovating (industrialized) countries. Therefore, implementing IPRs would seem counterintuitive for developing countries as it restricts their ability to imitate. However, the true impact of IPR policy in developing countries remains largely unclear. My research unravels some of the links between IPRs, and technology transfer issue in the following three essays. My first essay focuses on the Indian pharmaceutical market. I describe the transition dynamics of imposing stronger IPRs in a theoretical model and I test the implications of this model for the adjustment path of innovation, imitation and R&D offshoring using a panel of 354 Indian pharmaceutical firms over the period 1989 to 2008. I find that that innovation behaves as expected while imitation exhibits an unexpected increase after the announcement and decreases after the policy change. To better understand this transition, the second essay examines the short-run and long-run effects of stronger IPRs within two types of endogenous product-cycle models developed by Grossman and Helpman. In my third essay I analyze the offshoring decision of companies for either forming a joint venture with a local firm or entering a contractual partnership, with a special focus on the research and development activity. First I present a theoretical model that describes this decision and then I test the implications of the model in the pharmaceutical market for a panel of 89 countries over the period 1990 to 2009. I find that weak IPRs in the destination country support a joint venture partnership to reduce the risk of knowledge leakage while large fixed costs of establishing a joint venture supports a contractual partnership.
Gibbs-type Indian buffet processes
Creators: name: Heaukulani, Creighton
name: Roy, Daniel M.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: We investigate a class of feature allocation models that generalize the Indian buffet process and are parameterized by Gibbs-type random measures. Two existing classes are contained as special cases: the original two-parameter Indian buffet process, corresponding to the Dirichlet process, and the stable (or three-parameter) Indian buffet process, corresponding to the Pitman--Yor process. Asymptotic behavior of the Gibbs-type partitions, such as power laws holding for the number of latent clusters, translates into analogous characteristics for this class of Gibbs-type feature allocation models. Despite containing several different distinct subclasses, the properties of Gibbs-type partitions allow us to develop a black-box procedure for posterior inference within any subclass of models. Through numerical experiments, we compare and contrast a few of these subclasses and highlight the utility of varying power-law behaviors in the latent features.
description: 27 pages, 5 figures
Mutations of the cluster algebra of type $\boldsymbol{A^{(1)}_1}$ and the periodic discrete Toda lattice
Creators: name: Nobe, Atsushi
Publisher: name: arXiv
Year: 2016
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences
subject: 13F60, 35C08, 39A14, 14H52

description: A direct connection between two sequences of points, one of which is generated by seed mutations in the cluster algebra of type $A^{(1)}_1$ and the other by time evolutions of the periodic discrete Toda lattice, is explicitly given. In this construction, each of them is realized as an orbit of a QRT map and specialization of the parameters in the maps and appropriate choices of the initial points relate them. The connection with the periodic discrete Toda lattice enables us a geometric interpretation of the seed mutations in the cluster algebra of type $A^{(1)}_1$ as addition of points on an elliptic curve arising as the spectral curve of the Toda lattice.
description: 19 pages, 4 figures
From Athens to Atlantis: Democratic Mythmaking in Classical Greece
Creators: name: Stegman, Casey Edward
Publisher: name: University of North Carolina at Chapel Hill
Year: 2013

description: This paper is concerned with political myth and the process of political mythmaking in Classical Athens (5th-4th centuries B.C.E.), and by extension, in other democracies as well. While there has been a number of political science works that have looked at how monopolistic political myths are formed in authoritarian or otherwise restricted nationalist regimes, few have considered how political myths are created and transmitted in democracies. This paper addresses this dearth in the literature by investigating the understudied phenomenon that it labels democratic mythmaking. In looking at Classical Athens, this paper illustrates that democratic mythmaking has been a part of democracy since its inception. Discussing Herodotus, The Old Oligarch, Thucydides, Isocrates, and Plato, this paper illustrates that their works: 1) refer to and describe other democratic myths; 2) contribute myths of their own; and 3) demonstrate that the process of political mythmaking in a democracy is pluralistic, contested, and above all democratic.
Adjusting for Scorekeeper Bias in NBA Box Scores
Creators: name: van Bommel, Matthew
name: Bornn, Luke
Publisher: name: arXiv
Year: 2016
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: Box score statistics in the National Basketball Association are used to measure and evaluate player performance. Some of these statistics are subjective in nature and since box score statistics are recorded by scorekeepers hired by the home team for each game, there exists potential for inconsistency and bias. These inconsistencies can have far reaching consequences, particularly with the rise in popularity of daily fantasy sports. Using box score data, we estimate models able to quantify both the bias and the generosity of each scorekeeper for two of the most subjective statistics: assists and blocks. We then use optical player tracking data for the 2014-2015 season to improve the assist model by including other contextual spatio-temporal variables such as time of possession, player locations, and distance traveled. From this model, we present results measuring the impact of the scorekeeper and of the other contextual variables on the probability of a pass being recorded as an assist. Results for adjusting season assist totals to remove scorekeeper influence are also presented.
description: 16 pages, 7 figures, updated results to 2015-2016 season, added related works section, added model validation and consistency results
Conductivity of weakly disordered metals close to a "ferromagnetic" quantum critical point
Creators: name: Kastrinakis, George
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We calculate analytically the conductivity of weakly disordered metals close to a "ferromagnetic" quantum critical point in the low temperature regime. Ferromagnetic in the sense that the effective carrier potential $V(q,ω)$, due to critical fluctuations, is peaked at zero momentum $q=0$. Vertex corrections, due to both critical fluctuations and impurity scattering, are explicitly considered. We find that only the vertex corrections due to impurity scattering, combined with the self-energy, generate appreciable effects as a function of the temperature $T$ and the control parameter $a$, which measures the proximity to the critical point. Our results are consistent with resistivity experiments in several materials displaying typical Fermi liquid behavior, but with a diverging prefactor of the $T^2$ term for small $a$.
description: 9 pages
Framework Materials For Solar Energy Utilization
Creators: name: Wang, Cheng
Publisher: name: University of North Carolina at Chapel Hill
Year: 2013

description: The ever-increasing global demand for energy has stimulated a new wave of research activities on generating clean and renewable energy using sunlight. Following the molecular approach adopted by green plants, scientists have developed various molecular systems that are capable of converting photons to high energy redox equivalents, as well as molecular catalysts for both water oxidation and proton/CO2 reduction. There are however not efficient ways of assembling these functional molecular components into hierarchical organizations to convert sunlight energy into chemical energy. Metal-organic frameworks (MOFs) are a class of crystalline materials that are constructed from well-defined molecular building blocks and metal-cluster connecting nodes. Similarly, crosslinked polymers (CPs) are built from well-designed organic precursors and represent a new class of robust materials. These framework materials provide a potential platform to organize different molecular components to achieve artificial photosynthesis. In this thesis, I will report our efforts on assembling MOFs and CPs for light harvesting, water oxidation, and photocatalytic proton and CO2 reduction. These materials not only provide a unique opportunity to integrate different functional molecular components hierarchically for energy conversion or organic transformation, but also allow the elucidation of molecular mechanisms for related reactions.
Smash Products of Calabi-Yau Algebras by Hopf Algebras
Creators: name: Meur, Patrick Le
Publisher: name: arXiv
Year: 2015
Subjects: subject: Rings and Algebras (math.RA)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 16E65, 16S40, 16E40, 16E45, 18G10

description: Let H be a Hopf algebra and A be an H-module algebra. This article investigates when the smash product A#H is (skew) Calabi-Yau, has Van den Bergh duality or is Artin-Schelter regular or Gorenstein. In particular, if A and H are skew Calabi-Yau, then so is A#H and its Nakayama automorphism is expressed using the ones of A and H. This is based on a description of the inverse dualising complex of A#H when A is a homologically smooth dg algebra and H is homologically smooth and with invertible antipode. This description is also used to explain the compatibility of standard constructions of Calabi-Yau dg algebras with taking smash products.
description: Minor corrections and changes to reflect the published article
Relationship between the Electronic Polarization and the Winding Number in Non-Hermitian Systems
Creators: name: Masuda, Shohei
name: Nakamura, Masaaki
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We discuss an extension of the Resta's electronic polarization to non-Hermitian systems with periodic boundary conditions. We introduce the ``electronic polarization'' as an expectation value of the exponential of the position operator in terms of the biorthogonal basis. We found that there appears a finite region where the polarization is zero between two topologically distinguished regions, and there is one-to-one correspondence between the polarization and the winding number which takes half-odd integers as well as integers. We demonstrate this argument in the non-Hermitian Su-Schrieffer-Heeger model.
description: 5 pages, 2 figures
Dissemination and Communication strategy
Creators: name: Silveira, Lina
name: Paramio, Luz
name: Nascimento, Gisela
Publisher: name: Zenodo
Year: 2022
Subjects: gender equality
gender equality plan (GEP)
communication and dissemination

description: The current document is a report on Deliverable 7.1 “Dissemination and Communication strategy” (M3); from Workpackage WP7 “Communication and Dissemination” of the ATHENA project (GA nº 101006416). This report is a concise plan to guide the communication and dissemination activities of the ATHENA project. The tools, procedures and guidelines to be adopted by partners are defined to ensure a clear, constant and coherent communication and dissemination of the project results to the desired target audiences. The D7.1 report intends to be a starting point to integrate the perspectives of organizations with different purposes, backgrounds and visions with the same goal of removing barriers to the recruitment, retention and career progression of female researchers; address gender imbalances in decision making processes; generate a cultural change needed to avoid future gender bias and discriminatory practices. The implementation of the GEPs will generate a sustainable cultural and institutional change that in turns will allow to unlock the research potential of the partnering organizations. The “Communication & Dissemination Strategy” is a document that will evolve and develop during the project’s life cycle, in order to respond to the partners’ needs if necessary taking in to account the changes agreed by the consortium partners and following the Grant Agreement commitments.
Superando obstáculos: Las redes de cooperación universitaria como mecanismo de desarrollo.
Creators: name: Garcia Vilcapuma, Jorge Luis
Publisher: name: Zenodo
Year: 2023
Subjects: desafíos de la educación superior

description: En el complejo panorama educativo actual, la educación superior cumple un rol fundamental en el desarrollo, pues es generadora de cambios. Sin embargo, afronta una serie de obstáculos que demandan acciones concretas que permitan superar los problemas de la sociedad. Por tal motivo, en esta ocasión, abordamos los planteamientos de la doctora Dolly Montoya Castaño, rectora de la Universidad Nacional y presidenta de la Unión de Universidades de América Latina y el Caribe, sobre los retos de la educación superior del futuro en el panel de “Integración académica y redes de cooperación regional para el desarrollo de las universidades latinoamericanas” organizado en el marco del seminario internacional “Desafíos de la educación superior en América Latina” desarrollado durante los días 10 y 11 de marzo del 2022 en Uruguay.
The propagation of chaos for a rarefied gas of hard spheres in the whole space
Creators: name: Denlinger, Ryan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We discuss old and new results on the mathematical justification of Boltzmann's equation. The classical result along these lines is a theorem which was proven by Lanford in the 1970s. This paper is naturally divided into three parts. I. Classical. We give new proofs of both the uniform bounds required for Lanford's theorem, as well as the related bounds due to Illner & Pulvirenti for a perturbation of vacuum. The proofs use a duality argument and differential inequalities, instead of a fixed point iteration. II. Strong chaos. We introduce a new notion of propagation of chaos. Our notion of chaos provides for uniform error estimates on a very precise set of points; this set is closely related to the notion of strong (one-sided) chaos and the emergence of irreversibility. III. Supplemental. We announce and provide a proof (in Appendix A) of propagation of partial factorization at some phase-points where complete factorization is impossible.
description: 69 pages
From rubble to revolutions and raves: literary interrogations of German media ecologies
Creators: name: Werbeck, Kai-Uwe
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2012

description: This dissertation queries the ways in which West German literature interrogated its role in larger media environments at three pivotal historical moments in German postwar history: the rubble years, the student revolts, and Germany's reunification. I argue that after moments of social and political unrest, the later twentieth-century German media ecologies so prominent in West German urban centers became more dynamic, allowing for fluid exchange and dialogue between newer and older media, an ecology in which a particularly attentive and intermedially sensitive subset of literature occupied a unique and unmistakably critical position; within postwar and contemporary German media ecologies, these texts, I argue, reflect on both the affirmative condition of dominant media environments as well as their political potential when reordered according to a literary vision. In a word, this dissertation contends that exemplars of German literature from the second half of the twentieth century have continually positioned themslves as critical monitors of and agents in the ever-evolving state of German media ecologies. The first chapter compares Wolfgang Staudte's seminal rubble film with the depiction of the city in the rubble literature of Heinrich B√∂ll in order to illustrate how these two media were instrumental in retracing the afterlife of German Expressionism. The second chapter centers on the literature in the wake of the unsuccessful German student revolutions in 1968 as well as its documentaries and field recordings as an urban aesthetic of resistance to political and cultural complacency. The epitome of this aesthetic, which I locate specifically in the works of Rolf Dieter Brinkmann, challenged the leading medium of the day, television, and rethought the streets as a place where interventions into mediated life could be waged during a post-revolutionary period characterized by political standstill. The final chapter focuses on the intersection of the Internet and literature from around the late 1990s and queries specifically the work of writer Rainald Goetz. Goetz explores Berlin and its nightlife through a poetics that centers on the assumed immediacy of the World Wide Web, championing a culturally determined communality over a national one. Beyond just demonstrating the highly mediated nature of the West German urban experience, these three case studies confirm that in an age of rapid technological developments and continually evolving new media, literature has held its ground as a major constituent in the German media ecologies.
ISF-GAN: An Implicit Style Function for High-Resolution Image-to-Image Translation
Creators: name: Liu, Yahui
name: Chen, Yajing
name: Bao, Linchao
name: Sebe, Nicu
name: Lepri, Bruno
name: De Nadai, Marco
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Recently, there has been an increasing interest in image editing methods that employ pre-trained unconditional image generators (e.g., StyleGAN). However, applying these methods to translate images to multiple visual domains remains challenging. Existing works do not often preserve the domain-invariant part of the image (e.g., the identity in human face translations), they do not usually handle multiple domains, or do not allow for multi-modal translations. This work proposes an implicit style function (ISF) to straightforwardly achieve multi-modal and multi-domain image-to-image translation from pre-trained unconditional generators. The ISF manipulates the semantics of an input latent code to make the image generated from it lying in the desired visual domain. Our results in human face and animal manipulations show significantly improved results over the baselines. Our model enables cost-effective multi-modal unsupervised image-to-image translations at high resolution using pre-trained unconditional GANs. The code and data are available at: \url{https://github.com/yhlleo/stylegan-mmuit}.
description: 14 pages, 15 figures
Exact Worst-case Performance of First-order Methods for Composite Convex Optimization
Creators: name: Taylor, Adrien B.
name: Hendrickx, Julien M.
name: Glineur, François
Publisher: name: arXiv
Year: 2015
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: We provide a framework for computing the exact worst-case performance of any algorithm belonging to a broad class of oracle-based first-order methods for composite convex optimization, including those performing explicit, projected, proximal, conditional and inexact (sub)gradient steps. We simultaneously obtain tight worst-case guarantees and explicit instances of optimization problems on which the algorithm reaches this worst-case. We achieve this by reducing the computation of the worst-case to solving a convex semidefinite program, generalizing previous works on performance estimation by Drori and Teboulle [13] and the authors [43]. We use these developments to obtain a tighter analysis of the proximal point algorithm and of several variants of fast proximal gradient, conditional gradient, subgradient and alternating projection methods. In particular, we present a new analytical worst-case guarantee for the proximal point algorithm that is twice better than previously known, and improve the standard worst-case guarantee for the conditional gradient method by more than a factor of two. We also show how the optimized gradient method proposed by Kim and Fessler in [22] can be extended by incorporating a projection or a proximal operator, which leads to an algorithm that converges in the worst-case twice as fast as the standard accelerated proximal gradient method [2].
description: Published in SIOPT (updated version with corrected typo) Code available at https://github.com/AdrienTaylor/Performance-Estimation-Toolbox