cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
HATS-17b: A Transiting Compact Warm Jupiter in a 16.3 Days Circular Orbit
Creators: name: Brahm, R.
name: Jordán, A.
name: Bakos, G. Á.
name: Penev, K.
name: Espinoza, N.
name: Rabus, M.
name: Hartman, J. D.
name: Bayliss, D.
name: Ciceri, S.
name: Zhou, G.
name: Mancini, L.
name: Tan, T. G.
name: de Val-Borro, M.
name: Bhatti, W.
name: Csubry, Z.
name: Bento, J.
name: Henning, T.
name: Schmidt, B.
name: Suc, V.
name: Lázár, J.
name: Papp, I.
name: Sári, P.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We report the discovery of HATS-17b, the first transiting warm Jupiter of the HATSouth network. HATS-17b transits its bright (V=12.4) G-type (M$_{\star}$=1.131 $\pm$ 0.030 M$_{\odot}$, R$_{\star}$=1.091$^{+0.070}_{-0.046}$ R$_{\star}$) metal-rich ([Fe/H]=+0.3 dex) host star in a circular orbit with a period of P=16.2546 days. HATS-17b has a very compact radius of 0.777 $\pm$ 0.056 R$_J$ given its Jupiter-like mass of 1.338 $\pm$ 0.065 M$_J$. Up to 50% of the mass of HATS-17b may be composed of heavy elements in order to explain its high density with current models of planetary structure. HATS-17b is the longest period transiting planet discovered to date by a ground-based photometric survey, and is one of the brightest transiting warm Jupiter systems known. The brightness of HATS-17b will allow detailed follow-up observations to characterize the orbital geometry of the system and the atmosphere of the planet.
description: 12 page, 8 figures, submitted to AJ
The Practice and Perception of Web Archiving in Academic Libraries and Archives
Creators: name: Gregory, Lisa A.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2009
Subjects: College and university libraries
Internet--United States
Web sites
Digital preservation
College and university archives
Electronic data archives--Conservation and restoration

description: The objective of this research is to try to gain a fuller picture of Web archiving activities in libraries and archives at institutions of higher education in the United States, and the perceptions librarians and archivists have of those activities. A Web-based self-administered survey was sent to multiple listservs, and 239 respondents completed the survey.  At the time of this survey, many higher education institutions had not implemented routine Web archiving activities. Although planning and testing was being carried out, these were still in the early stages. The results of this survey reveal that archivists and librarians believe Web sites should be archived, and that cost, support for technology, and lack of trained personnel are some of the factors prohibiting them from doing so.
Libraries and Book Culture of the Byzantine Empire
Creators: name: Ilie, Barbara J.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2007
Subjects: Books--History
Manuscripts, Medieval
Monastic libraries
Book Culture--Byzantine
Libraries--History

description: This paper examines the libraries and book culture of the Byzantine Empire. It finds that the Imperial and Patriarchal Libraries enjoyed royal patronage from the empire's very inception, and benefited from imperial largesse throughout its span. Private libraries and monastic libraries were also important; some private libraries rivaled their monastic and imperial counterparts. Another interesting find was that book ownership was reserved for the few; those in the practice of book production could derive a significant income from selling these items of luxury. Finally, devotion to the book assured that many works from antiquity and from the Byzantine period itself have survived until the present day. This devotion ranged from emperor to scribal monk, from calligrapher to scholar collector.
Strong CP and SUZ$_2$
Creators: name: Albaid, Abdelhamid
name: Dine, Michael
name: Draper, Patrick
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Solutions to the strong CP problem typically introduce new scales associated with the spontaneous breaking of symmetries. Absent any anthropic argument for small $\barθ$, these scales require stabilization against ultraviolet corrections. Supersymmetry offers a tempting stabilization mechanism, since it can solve the "big" electroweak hierarchy problem at the same time. One family of solutions to strong CP, including generalized parity models, heavy axion models, and heavy $η^\prime$ models, introduces $\mathbb{Z}_2$ copies of (part of) the Standard Model and an associated scale of $\mathbb{Z}_2$-breaking. We review why, without additional structure such as supersymmetry, the $\mathbb{Z}_2$-breaking scale is unacceptably tuned. We then study "SUZ$_2$" models, supersymmetric theories with $\mathbb{Z}_2$ copies of the MSSM. We find that the addition of SUSY typically destroys the $\mathbb{Z}_2$ protection of $\barθ=0$, even at tree level, once SUSY and $\mathbb{Z}_2$ are broken. In theories like supersymmetric completions of the twin Higgs, where $\mathbb{Z}_2$ addresses the little hierarchy problem but not strong CP, two axions can be used to relax $\barθ$.
description: 18 pp, v2: refs added
One-Time Universal Hashing Quantum Digital Signatures without Perfect Keys
Creators: name: Li, Bing-Hong
name: Xie, Yuan-Mei
name: Cao, Xiao-Yu
name: Li, Chen-Long
name: Fu, Yao
name: Yin, Hua-Lei
name: Chen, Zeng-Bing
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: Cryptography and Security (cs.CR)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Quantum digital signatures (QDS), generating correlated bit strings among three remote parties for signatures through quantum law, can guarantee non-repudiation, authenticity, and integrity of messages. Recently, one-time universal hashing QDS framework, exploiting the quantum asymmetric encryption and universal hash functions, has been proposed to significantly improve the signature rate and ensure unconditional security by directly signing the hash value of long messages. However, similar to quantum key distribution, this framework utilizes keys with perfect secrecy by performing privacy amplification that introduces cumbersome matrix operations, thereby consuming large computational resources, causing delays and increasing failure probability. Here, we prove that, different from private communication, imperfect quantum keys with limited information leakage can be used for digital signatures and authentication without compromising the security while having eight orders of magnitude improvement on signature rate for signing a megabit message compared with conventional single-bit schemes. This study significantly reduces the delay for data postprocessing and is compatible with any quantum key generation protocols. In our simulation, taking two-photon twin-field key generation protocol as an example, QDS can be practically implemented over a fiber distance of 650 km between the signer and receiver. For the first time, this study offers a cryptographic application of quantum keys with imperfect secrecy and paves a way for the practical and agile implementation of digital signatures in a future quantum network.
description: 20 pages, 7 figures
Outflow-Confined H II Regions. I. First Signposts of Massive Star Formation
Creators: name: Tanaka, Kei E. I.
name: Tan, Jonathan C.
name: Zhang, Yichen
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: We present an evolutionary sequence of models of the photoionized disk-wind outflow around forming massive stars based on the Core Accretion model. The outflow is expected to be the first structure to be ionized by the protostar and can confine the expansion of the HII region, especially in lateral directions in the plane of the accretion disk. The ionizing luminosity increases as Kelvin-Helmholz contraction proceeds, and the HII region is formed when the stellar mass reaches ~10-20Msun depending on the initial cloud core properties. Although some part of outer disk surface remains neutral due to shielding by the inner disk and the disk wind, almost the whole of the outflow is ionized in 1e3-1e4 yr after initial HII region formation. Having calculated the extent and temperature structure of the HII region within the immediate protostellar environment, we then make predictions for the strength of its free-free continuum and recombination line emission. The free-free radio emission from the ionized outflow has a flux density of ~(20-200)x(nu/10GHz)^p mJy for a source at a distance of 1 kpc with a spectral index p~0.4-0.7, and the apparent size is typically ~500AU at 10GHz. The H40alpha line profile has a width of about 100km/s. These properties of our model are consistent with observed radio winds and jets around forming massive protostars.
description: 23 pages, 19 figures, accepted for publication in ApJ
Entosthodon heddersonii N. Wilding 2017, sp. nov.
Creators: name: Wilding, Nicholas
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Plantae
Bryophyta
Bryopsida
Funariales
Funariaceae
Entosthodon
Entosthodon heddersonii

description: Entosthodon heddersonii N. Wilding, sp. nov. (Fig. 1)
 Diagnosis:—Differing from all other species of the genus Entosthodon by its combination of narrowly oblong-obovate, aristate leaves, that are bordered and toothed in the upper ⅔ and its zygomorphic, peristomate capsules.
 TYPE:— TANZANIA. South Uluguru Mts.: East edge of Lukwangule Plateau, 2350–2370 m, 9 June 1988, T. Pócs, R. Ochyra & H. Bednarek-Ochyra 88108/ V (BOL, holotype!; isotype EGR!).
 Plants small, light-green. Stems reddish-brown, to 3 mm high, branching multiple times by sub-perigonial innovation; in cross-section with 1‒2 layers of thick-walled cortical cells, a hyalodermis and a central strand; rhizoids cerise. Leaves erect-spreading, contorted when dry, narrowly oblong-obovate, (0.75)1.2–1.6(1.9) × 0.4–0.6 mm, plane to slightly recurved, short-acuminate, serrate in upper ⅔, aristate, arista to 300 μm; cells of upper lamina quadrate to oblong-hexagonal, 37–63 × 15–25 μm; basal cells 50–125 × 20–30 μm; marginal cells longer and narrower, thicker-walled, forming a border one cell wide; costae ending below apex.
 Polyoicous. Setae 5–13mm long, straight to curved, pale-yellow to reddish-brown. Capsules inclined to horizontal, gibbous, zygomorphic, oblong-obovoid, 1.4–2.5 × 0.5–1 mm, weakly constricted below the mouth when dry, yellow to reddish-brown at maturity, with a well differentiated neck ca. ½ the total length of the capsule; mouth slightly oblique, ca. ¾ the diameter of the capsule; exothecial cells 15–25 × 3–7 μm, in cross-section with thick, strongly cuneate anticlinal walls, 3–5 rows of oblate cells at mouth. Opercula plano-convex, cells twisted anti-clockwise from above. Peristome double; exostome teeth straight, regular in shape, orange, tapered to an acute apex, to 100 μm high, ca. 20 μm wide at base, smooth, striate, trabeculate; endostome teeth smooth, hyaline, to 40 μm high and 30 μm wide. Spores 30–35 μm, tetrahedral, verrucate-lirate to reticulate. Calyptrae cucullate, rostrate.
 Etymology: The species is named in honour of Terry A.J. Hedderson, for his interest in, and extensive collecting of, Entosthodon in southern Africa and for his contribution towards African bryology.
 Habitat and distribution: The species is known only from the type collection in the Uluguru Mountains of Tanzania. The type of E. heddersonii was collected at an elevation of ca. 2360 m along a rocky, peaty stream bank on the eastern edge of the Lukwangule Plateau.
description: Published as part of Wilding, Nicholas, 2017, Three new species of Entosthodon Schwägr. (Bryopsida, Funariaceae) from sub-Saharan Africa, pp. 103-110 in Phytotaxa 312 (1) on pages 104-105, DOI: 10.11646/phytotaxa.312.1.8, http://zenodo.org/record/13701520
Optimal one-shot entanglement sharing
Creators: name: Siddhu, Vikesh
name: Smolin, John
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Sharing entanglement across quantum interconnects is fundamental for quantum information processing. We discuss a practical setting where this interconnect, modeled by a quantum channel, is used once with the aim of sharing high fidelity entanglement. For any channel, we provide methods to easily find both this maximum fidelity and optimal inputs that achieve it. Unlike most metrics for sharing entanglement, this maximum fidelity can be shown to be multiplicative. This ensures a complete understanding in the sense that the maximum fidelity and optimal inputs found in our one-shot setting extend even when the channel is used multiple times, possibly with other channels. Optimal inputs need not be fully entangled. We find the minimum entanglement in these optimal inputs can even vary discontinuously with channel noise. Generally, noise parameters are hard to identify and remain unknown for most channels. However, for all qubit channels with qubit environments, we provide a rigorous noise parametrization which we explain in-terms of no-cloning. This noise parametrization and a channel representation we call the standard Kraus decomposition have pleasing properties that make them both useful more generally.
description: Essentially matches published version
Predicting Stock Price Changes with Earnings Call Transcripts
Creators: name: Liang, Dong
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2016
Subjects: Text mining
Machine learning
Sentiment analysis

description: This paper adopts sentiment analysis approaches to predict stock price changes of 14 major U.S. airlines, using 325 earnings call transcripts from year 2007 to 2015. We combined machine learning classification techniques with Loughran and McDonald Sentiment Word Lists (Master Dictionary), and built the Python program from scratch. Text transcripts as well as stock prices were captured online. Transcripts were labeled according to sentiment scores defined by us. After a three-way data split, all six algorithms failed to result in an ideal accuracy. The results suggest that earnings call transcripts are not informative enough to predict stock price changes.
Gauge $B-L$ Model with Residual $Z_3$ Symmetry
Creators: name: Ma, Ernest
name: Pollard, Nicholas
name: Srivastava, Rahul
name: Zakeri, Mohammadreza
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study a gauge $B-L$ extension of the standard model of quarks and leptons with unconventional charges for the singlet right-handed neutrinos, and extra singlet scalars, such that a residual $Z_3$ symmetry remains after the spontaneous breaking of $B-L$. We discuss the phenomenological consequences of this scenario, including the possibility of long-lived self-interacting dark matter and $Z'$ collider signatures.
description: 11 pages, 2 figures, references added, fig.1 corrected
Librarians Who Code: Web and Software Development Skills of Academic Library Staff in the Southeastern United States
Creators: name: Bell, Michael
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2014
Subjects: Web development
Library education--Evaluation
Academic libraries--Officials & employees

description: This study used an online survey of academic library staff in the southeastern United States to explore what web and/or software development skills are used by library staff whose job responsibilities include those areas; where and when such staff members learn these skills; and, for those with Master of Library and Information Science (MLIS) degrees, how useful LIS courses were in acquiring these skills. Survey results reveal discrepancies between the development skills learned through LIS programs and skills used on the job. They also indicate that academic library staff who have an MLIS degree found LIS courses to be the least useful among various instructional methods for acquiring development skills. This research may help guide changes in LIS curricula to better meet the needs of aspiring academic web librarians, help such students discern what course of study will be most useful, and suggest priorities for on-the-job training for web librarians.
Transition between self-focusing and self-defocusing in nonlocally nonlinear media
Creators: name: Liang, Guo
name: Hong, Weiyi
name: Hu, Yahong
name: Wang, Jing
name: Wang, Zhuo
name: Li, Yingbing
name: Guo, Qi
name: Hu, Wei
name: Lou, Senyue
name: Christodoulides, Demetrios N.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We reveal the relevance between the nonlocality and the focusing/defocusing states in nonlocally nonlinear media, and predict a novel phenomenon that the self-focusing/self-defocusing property of the optical beam in the nonlocally nonlinear medium with a sine-oscillation response function depends on its degree of nonlocality. The transition from the focusing nonlinearity to the defocusing nonlinearity of the nonlinear refractive index will happen when the degree of nonlocality of the system goes cross a critical value, and vise verse. Bright and dark soliton solutions are obtained, respectively, in the focusing state and in the defocusing state, and their stabilities are also discussed. It is mentioned that such a phenomenon might be experimentally realized in the nematic liquid crystal with negative dielectric anisotropy or in the quadratic nonlinear medium.
description: 6 pages, 4 figures
Youth Literature Related to Moving and Relocation: An Annotated Bibliography
Creators: name: Couch, Amber N.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2009
Subjects: Bibliotherapy
Children's literature--Bibliography
Moving--Bibliography
Young adults' literature--Bibliography

description: Almost seventy million youth move every year. Research has shown that youth who  move frequently, often have a higher rate of behavioral problems and are more likely to  need to repeat a grade level. It has long been recognized that books can have a powerful  impact on a person emotionally. Bibliotherapy, a way for books to help a person deal  with personal problems, may help youth escape their own situations and see how others  face similar problems themselves. This bibliography will help youth, parents, teachers,  and librarians find literature to help youth cope with stressful situations caused by  moving.
Two-dimensional anisotropic vortex quantum droplets in dipolar Bose-Einstein condensates
Creators: name: Li, Guilong
name: Jiang, Xunda
name: Liu, Bin
name: Chen, Zhaopin
name: Malomed, Boris A.
name: Li, Yongyao
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: Creation of stable intrinsically anisotropic self-bound states with embedded vorticity is a challenging issue. Previously, no such states in Bose-Einstein condensates (BECs) or other physical settings were known. Dipolar BEC suggests a unique possibility to predict stable anisotropic vortex quantum droplets (AVQDs). We demonstrate that they can be created with the vortex' axis oriented \emph{perpendicular} to the polarization of dipoles. The stability area and characteristics of the AVQDs in the parameter space are revealed by means of analytical and numerical methods. Further, the rotation of the polarizing magnetic field is considered, and the largest angular velocities, up to which spinning AVQDs can follow the rotation in clockwise and anti-clockwise directions, are found. Collisions between moving AVQDs are studied too, demonstrating formation of bound states with a vortex-antivortex-vortex structure. A stability domain for such stationary bound states is identified. Unstable dipolar states, that can be readily implemented by means of phase imprinting, quickly transform into robust AVQDs, which suggests a straightforward possibility for the creation of these states in the experiment.
description: 6 pages, 6 figures, and 48 references
MS Gr. class. c. 2 290
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 307 col. 5. Chrysippus, Quaestiones logicae
Drawing by Carlo Orazi
The Information Worlds of Art Museum Curators and Registrars: an Institutional Ethnography of Practice in North Carolina Institutions.
Creators: name: Murphy, Devon
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2018

description: This paper presents an institutional ethnography analysis of the information worlds of art museum curators and registrars to determine what information sources were used by art museum staff in specific work tasks. This study was conducted in four art museums in North Carolina; the Mint Museum in Charlotte, NC, the Ackland Art Museum in Chapel Hill, NC, the Nasher Art Museum in Durham, NC, and the Weatherspoon Art Museum in Greensboro, NC. Six curators and four registrars took part in the study, which consisted of interviews and information horizon maps. The results demonstrate a wide use of both digital and print sources used in work tasks, with an emphasis on utilizing document surrogates in lieu of the physical art object. However, difficulties in accessing information about art objects in other collections was widely reported, making planning exhibitions and conducting research more time-intensive. Further study into museum websites and catalogs is encouraged.
Talking Back: How Congress Engages With the Public on Twitter
Creators: name: McLendon, Grant
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2015
Subjects: Text mining
Machine learning
Microblogs

description: This paper examines political social media interaction between Members of the United States Congress and the general public on Twitter. Specifically it attempts to gain a better understanding of what motivates a Member of Congress to reply to a tweet by building a model to predict which tweets Members of Congress will reply to. Predicting social media interaction of elected Members of Congress is a challenging machine learning task. MOCs reply more often to positive tweets based on personal interactions they have had and positive feedback. The distribution of reply to non-reply tweets makes predicting responses very error prone. In this process a several methods of predicting rare events in text were attempted with inconclusive results.
Minimal Renyi-Ingarden-Urbanik entropy of multipartite quantum states
Creators: name: Enriquez, Marco
name: Puchała, Zbigniew
name: Życzkowski, Karol
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the entanglement of a pure state of a composite quantum system consisting of several subsystems with $d$ levels each. It can be described by the Rényi-Ingarden-Urbanik entropy $S_q$ of a decomposition of the state in a product basis, minimized over all local unitary transformations. In the case $q=0$ this quantity becomes a function of the rank of the tensor representing the state, while in the limit $q \to \infty$ the entropy becomes related to the overlap with the closest separable state and the geometric measure of entanglement. For any bipartite system the entropy $S_1$ coincides with the standard entanglement entropy. We analyze the distribution of the minimal entropy for random states of three and four-qubit systems. In the former case the distributions of $3$-tangle is studied and some of its moments are evaluated, while in the latter case we analyze the distribution of the hyperdeterminant. The behavior of the maximum overlap of a three-qudit system with the closest separable state is also investigated in the asymptotic limit.
description: 19 pages
Fast spline detection in high density microscopy data
Creators: name: Alonso, Albert
name: Kirkegaard, Julius B.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Computer and information sciences
subject: FOS: Biological sciences

description: Computer-aided analysis of biological microscopy data has seen a massive improvement with the utilization of general-purpose deep learning techniques. Yet, in microscopy studies of multi-organism systems, the problem of collision and overlap remains challenging. This is particularly true for systems composed of slender bodies such as crawling nematodes, swimming spermatozoa, or the beating of eukaryotic or prokaryotic flagella. Here, we develop a novel end-to-end deep learning approach to extract precise shape trajectories of generally motile and overlapping splines. Our method works in low resolution settings where feature keypoints are hard to define and detect. Detection is fast and we demonstrate the ability to track thousands of overlapping organisms simultaneously. While our approach is agnostic to area of application, we present it in the setting of and exemplify its usability on dense experiments of crawling Caenorhabditis elegans. The model training is achieved purely on synthetic data, utilizing a physics-based model for nematode motility, and we demonstrate the model's ability to generalize from simulations to experimental videos.
The star inside the apple: on the design of a wonder-full education
Creators: name: Reade, Tripp
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1999
Subjects: Cognitive Style
Educational Philosophy
Learning Processes
Reflective Teaching
Curriculum Development

description: K-12 education sets certain goals for children; these goals are achieved with varying success rates.  Discourse on education tends not to question the ultimate purpose of these goals.  The result may be empty achievement.  This reflective essay discusses educational practice and proposes a curriculum rationale devised to nurture curiosity and wonder.  Introspective question - why the subject fascinates, why education is important, the intellectual path taken in pursuit of this topic are treated first.  Following a description of modern assumptions concerning education comes discussion of learning theory, of the developmental arc of children, and of an alternate pattern of education for K-12.  Principles are extracted from a variety of educational philosophers, primarily Howard Gardner, Frank Smith, and Jerome Bruner, and blended to form a curriculum outline.  Examples of how these principles might be implemented in a school setting are offered.
Lehmann representation of the nonequilibrium self-energy
Creators: name: Gramsch, Christian
name: Potthoff, Michael
Publisher: name: arXiv
Year: 2015
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: It is shown that the non-equilibrium self-energy of an interacting lattice-fermion model has a unique Lehmann representation. Based on the construction of a suitable non-interacting effective medium, we provide an explicit and numerically practicable scheme to construct the Lehmann representation for the self-energy, given the Lehmann representation of the single-particle non-equilibrium Green's function. This is of particular importance for an efficient numerical solution of Dyson's equation in the context of approximations where the self-energy is obtained from a reference system with a small Hilbert space. As compared to conventional techniques to solve Dyson's equation on the Keldysh contour, the effective-medium approach allows to reach a maximum propagation time which can be several orders of magnitude longer. This is demonstrated explicitly by choosing the non-equilibrium cluster-perturbation theory as a simple approach to study the long-time dynamics of an inhomogeneous initial state after a quantum quench in the Hubbard model on a 10 x 10 square lattice. We demonstrate that the violation of conservation laws is moderate for weak Hubbard interaction and that the cluster approach is able to describe prethermalization physics.
description: 12 pages, 7 figures, v2 with minor changes
Safety-Critical Traffic Control by Connected Automated Vehicles
Creators: name: Yu, Huan
name: Zhao, Chenguang
name: Molnar, Tamas G.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Connected automated vehicles (CAVs) have shown great potential in improving traffic throughput and stability. Although various longitudinal control strategies have been developed for CAVs to achieve string stability in mixed-autonomy traffic systems, the potential impact of these controllers on safety has not yet been fully addressed. This paper proposes safety-critical traffic control (STC) by CAVs -- a strategy that allows a CAV to stabilize the traffic behind it, while maintaining safety relative to both the preceding vehicle and the following connected human-driven vehicles (HDVs). Specifically, we utilize control barrier functions (CBFs) to impart collision-free behavior with formal safety guarantees to the closed-loop system. The safety of both the CAV and HDVs is incorporated into the framework through a quadratic program-based controller, that minimizes deviation from a nominal stabilizing traffic controller subject to CBF-based safety constraints. Considering that some state information of the following HDVs may be unavailable to the CAV, we employ state observer-based CBFs for STC. Finally, we conduct extensive numerical simulations -- that include vehicle trajectories from real data -- to demonstrate the efficacy of the proposed approach in achieving string stable and, at the same time, provably safe traffic.
The intersection of a hyperplane with a lightcone in the Minkowski spacetime
Creators: name: Le, Pengyu
Publisher: name: arXiv
Year: 2016
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: Klainerman, Luk and Rodnianski derived an anisotropic criterion for formation of trapped surfaces in vacuum, extending the original trapped surface formation theorem of Christodoulou. The effort to understand their result led us to study the intersection of a hyperplane with a lightcone in the Minkowski spacetime. For the intrinsic geometry of the intersection, depending on the hyperplane being spacelike, null or timelike, it has the constant positive, zero or negative Gaussian curvature. For the extrinsic geometry of the intersection, we find that it is a noncompact marginal trapped surface when the hyperplane is null. In this case, we find a geometric interpretation of the Green's function of the Laplacian on the standard sphere. In the end, we contribute a clearer understanding of the anisotropic criterion for formation of trapped surfaces in vacuum.
description: 11 pages
Thermal-dephasing-tolerant generation of Schrödinger cat states with Rydberg dressed blockade
Creators: name: Zheng, Ri-Hua
name: Su, S. -L.
name: Song, Jie
name: Li, Weibin
name: Xia, Yan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Multipartite entangled states involving non-locality are one of the most fascinating characteristics of quantum mechanics. In this work, we propose a thermal-dephasing-tolerant generation of mesoscopic entangled states with Rydberg dressed atoms. We encode logical state on dressed states rather than Rydberg states. Such treatment can increase the lifetime of multipartite entanglement coherence to around 3 times compared to the Rydberg-state-coding one at the same system size, and therefore induce solid fidelities of mesoscopic superposition states generation. The current work theoretically verifies the advantages of using Rydberg dressed states in many-body quantum entanglement, which is helpful for large-scale quantum computation and many-body Rydberg quantum simulation.
description: 10 pages, 10 figures, 1 table
Self-Archiving of Articles Published in High-Impact Journals in the Social Sciences
Creators: name: Batty, Lyn M.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2009
Subjects: Scholarly publishing
Open access publishing
Electronic data archives

description: Self-archiving of peer-reviewed articles represents one path toward increasing the  public's exposure to relevant social science research. This paper discusses self-archiving  behavior of scholars who have published articles in high-impact journals in the fields of  anthropology, sociology, economics and political science. A total of 1,686 articles  published during 2007 and 2008 were searched to determine which of the articles had  been self-archived. The resulting data illuminates the self-archiving practices of 3,440  individual authors within the four social science fields. The results indicate that self-archiving  behavior varies depending on the author's discipline, region, and author order.  Self-archiving policies of journal publishers are also examined to compare restrictions on  self-archiving with authors' self-archiving practices.
Carbon-enhanced metal-poor stars: a window on AGB nucleosynthesis and binary evolution. II. Statistical analysis of a sample of 67 CEMP-$s$ stars
Creators: name: Abate, C.
name: Pols, O. R.
name: Izzard, R. G.
name: Karakas, A. I.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Many observed CEMP stars are found in binary systems and show enhanced abundances of $s$-elements. The origin of the chemical abundances of these CEMP-$s$ stars is believed to be accretion in the past of enriched material from a primary star in the AGB phase. We investigate the mechanism of mass transfer and the process of nucleosynthesis in low-metallicity AGB stars by modelling the binary systems in which the observed CEMP-$s$ stars were formed. For this purpose we compare a sample of $67$ CEMP-$s$ stars with a grid of binary stars generated by our binary evolution and nucleosynthesis model. We classify our sample CEMP-$s$ stars in three groups based on the observed abundance of europium. In CEMP$-s/r$ stars the europium-to-iron ratio is more than ten times higher than in the Sun, whereas it is lower than this threshold in CEMP$-s/nr$ stars. No measurement of europium is currently available for CEMP-$s/ur$ stars. On average our models reproduce well the abundances observed in CEMP-$s/nr$ stars, whereas in CEMP-$s/r$ stars and CEMP-$s/ur$ stars the abundances of the light-$s$ elements are systematically overpredicted by our models and in CEMP-$s/r$ stars the abundances of the heavy-$s$ elements are underestimated. In all stars our modelled abundances of sodium overestimate the observations. This discrepancy is reduced only in models that underestimate the abundances of most of the $s$-elements. Furthermore, the abundance of lead is underpredicted in most of our model stars. These results point to the limitations of our AGB nucleosynthesis model, particularly in the predictions of the element-to-element ratios. Finally, in our models CEMP-$s$ stars are typically formed in wide systems with periods above 10000 days, while most of the observed CEMP-$s$ stars are found in relatively close orbits with periods below 5000 days.
description: 23 pages, 8 figures, accepted for publication on Astronomy & Astrophysics
MS Gr. class. c. 2 291
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 307 col. 6. Chrysippus, Quaestiones logicae
Drawing by Carlo Orazi
'A Strenuous Game': The Portrayal of Eating Disorders in Young Adult Novels.
Creators: name: Waxman, Dina F.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2007
Subjects: Eating disorders
Content analysis--Young adult literature
Eating Disorders in Adolescence
Young adult literature

description: This study uses content analysis to examine the portrayal of eating disorders in young adult novels published from 1981-2005. Fifteen books were evaluated to determine if the portrayal of eating disorders was accurate according to documented psychological profiles of the causes and risk factors for eating disorders. Additionally, the books were evaluated to see if the portrayal of eating disorders over time had changed to correspond with evolving information on eating disorders. This study concludes that while eating disorders are being portrayed accurately and realistically in young adult literature, there is no change in the portrayals over time to complement evolving research on the risk factors and causes of eating disorders.
Maximal norm Hankel operators
Creators: name: Brevig, Ole Fredrik
name: Seip, Kristian
Publisher: name: arXiv
Year: 2023
Subjects: subject: Functional Analysis (math.FA)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics

description: A Hankel operator $\mathbf{H}_φ$ on the Hardy space $H^2$ of the unit circle with analytic symbol $φ$ has minimal norm if $\|\mathbf{H}_φ\|=\|φ\|_2$ and maximal norm if $\|\mathbf{H}_φ\| = \|φ\|_\infty$. The Hankel operator $\mathbf{H}_φ$ has both minimal and maximal norm if and only if $|φ|$ is constant almost everywhere on the unit circle or, equivalently, if and only if $φ$ is a constant multiple of an inner function. We show that if $\mathbf{H}_φ$ is norm-attaining and has maximal norm, then $\mathbf{H}_φ$ has minimal norm. If $|φ|$ is continuous but not constant, then $\mathbf{H}_φ$ has maximal norm if and only if the set at which $|φ|=\|φ\|_{\infty}$ has nonempty intersection with the spectrum of the inner factor of $φ$. We obtain further results illustrating that the case of maximal norm is in general related to "irregular" behavior of $\log |φ|$ or the argument of $φ$ near a "maximum point" of $|φ|$. The role of certain positive functions coined apical Helson--Szegő weights is discussed in the former context.
The Impact of School Libraries on Student Achievement in North Carolina Charter Schools
Creators: name: Allen, Elizabeth R.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2007
Subjects: School libraries--North Carolina
School libraries
School libraries--Evaluation
School Libraries--Charter Schools

description: Charter schools are schools funded by public money, but free of many of the rules and regulations typically governing public schools. It was thought that this freedom would allow schools to innovate and raise student achievement, but this has not generally been borne out by the evidence. Because of their funding model, charter schools often lack the start-up and facilities money of public schools. They frequently lack libraries, although multiple studies have shown school libraries and librarians to have an impact on student achievement. This study examines charter schools in North Carolina both with and without libraries and librarians and finds that their presence has a consistent positive, but not statistically significant, impact on student achievement.
[Master's Thesis] "Operating Photovoltaic Power Plants : Big Data and Modeling"
Creators: name: Ayat-Allah Bouramdane
Publisher: name: Zenodo
Year: 2018
Subjects: Photovoltaic, Data Analysis, Modeling, Fault Detection and Diagnosis

description: Master's Thesis (École Polytechnique, GeePs CentraleSupelec, Palaiseau, France)
MS Gr. class. c. 2 292
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 307 col. 7. Chrysippus, Quaestiones logicae
Drawing by Carlo Orazi
Neighborhood Homophily-based Graph Convolutional Network
Creators: name: Gong, Shengbo
name: Zhou, Jiajun
name: Xie, Chenxuan
name: Xuan, Qi
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Graph neural networks (GNNs) have been proved powerful in graph-oriented tasks. However, many real-world graphs are heterophilous, challenging the homophily assumption of classical GNNs. To solve the universality problem, many studies deepen networks or concatenate intermediate representations, which does not inherently change neighbor aggregation and introduces noise. Recent studies propose new metrics to characterize the homophily, but rarely consider the correlation of the proposed metrics and models. In this paper, we first design a new metric, Neighborhood Homophily (\textit{NH}), to measure the label complexity or purity in node neighborhoods. Furthermore, we incorporate the metric into the classical graph convolutional network (GCN) architecture and propose \textbf{N}eighborhood \textbf{H}omophily-based \textbf{G}raph \textbf{C}onvolutional \textbf{N}etwork (\textbf{NHGCN}). In this framework, neighbors are grouped by estimated \textit{NH} values and aggregated from different channels, and the resulting node predictions are then used in turn to estimate and update \textit{NH} values. The two processes of metric estimation and model inference are alternately optimized to achieve better node classification. NHGCN achieves top overall performance on both homophilous and heterophilous benchmarks, with an improvement of up to 7.4\% compared to the current SOTA methods.
description: Accepted by the 32nd ACM International Conference on Information and Knowledge Management (CIKM 2023)
The interventions of the Italian Recovery and Resilience Plan: Energy efficiency in urban areas
Creators: name: Sgambati, Sabrina
Publisher: name: TeMA - Journal of Land Use, Mobility and Environment
Year: 2022

description: Starting from the relationship between urban planning and mobility management, TeMA has gradually expanded the view of the covered topics, always following a rigorous scientific in-depth analysis. This section of the Journal, Review Notes, is the expression of a continuous updating of emerging topics concerning relationships among urban planning, mobility and environment, through a collection of short scientific papers. The Review Notes are made of five parts. Each section examines a specific aspect of the broader information storage within the main interests of TeMA Journal. This section of the Review Notes explores a specific topic, related to cities, within the framework of the European program NextGenerationEU. This contribution deepens the topic of energy efficiency in urban areas, providing an overview of the proposed interventions to improve energy management and save natural resources in the Italian Recovery and Resilience Plan (NRRP). The aim is deepening how these measures are intended to make Italian cities more sustainable, livable and environmental-friendly. Furthermore, it highlights the main strategies, reforms, and interventions which have been activated in Italian cities, thanks to the NRRP investments.
description: TeMA - Journal of Land Use, Mobility and Environment, Vol 15 No 2 (2022): The city challenges and external agents. Methods, tools and best practices
Correlations of correlations: Secondary autocorrelations in finite harmonic systems
Creators: name: Plyukhin, Dan
name: Plyukhin, Alex V.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Dynamical Systems (math.DS)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: The momentum or velocity autocorrelation function C(t) for a tagged oscillator in a finite harmonic system decays like that of an infinite system for short times, but exhibits erratic behavior at longer time scales. We introduce the autocorrelation function of the long-time noisy tail of C(t) ("a correlation of the correlation"), which characterizes the distribution of recurrence times. Remarkably, for harmonic systems with same-mass particles this secondary correlation may coincide with the primary correlation C(t) (when both functions are normalized) either exactly, or over a significant initial time interval. When the tagged particle is heavier than the rest, the equality does not hold, correlations shows non-random long-time scale pattern, and higher order correlations converge to the lowest normal mode.
description: 9 pages, 6 figures
Object Lessons: An Assessment of Special Collections Pedagogy
Creators: name: Kader, Emily
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2013
Subjects: Archives and education
Libraries--Special collection
Rare books

description: This paper argues that special collections pedagogy should focus on students' critical
engagement with material objects rather than on passive reception of information. Taking
a pedagogical framework from Paulo Friere and considering recent developments within
innovative special collections teaching practices, this essay assesses two examples from
the author's own teaching that follow this pedagogical philosophy.
Constraints on the Parameterized Deceleration Parameter in FLRW Universe
Creators: name: Chaudhary, Himanshu
name: Bouali, Amine
name: Debnath, Ujjal
name: Roy, Tanusree
name: Mustafa, G.
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Confirmation of accelerated expansion of the universe probed the concept of dark energy theory, and since then, numerous models have been introduced to explain its origin and nature. The present work is based on reconstructing dark energy by parametrization of the deceleration parameter in the FRW universe filled with radiation, dark matter, and dark energy. We have chosen some well-motivated parametrized models 1-3 in an attempt to investigate the energy density in terms of deceleration parameters by estimating the cosmological parameters with the help of different observational datasets. Also, we have introduced a new model 4 for the parametrization of the deceleration parameter. Then we analyzed the cosmography parameters using the best-fit values of the parameters. Using the information criteria, we have examined the viability of the models.
description: 16 pages, 24 figures, accepted for publication in physica scripta
MS Gr. class. c. 2 293
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 307 col. 8. Chrysippus, Quaestiones logicae
Drawing by Carlo Orazi
Using simplicial volume to count maximally broken Morse trajectories
Creators: name: Alpert, Hannah
Publisher: name: arXiv
Year: 2015
Subjects: subject: Geometric Topology (math.GT)
subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: 53C23, 58E05, 57N80

description: Given a closed Riemannian manifold of dimension $n$ and a Morse-Smale function, there are finitely many $n$-part broken trajectories of the negative gradient flow. We show that if the manifold admits a hyperbolic metric, then the number of $n$-part broken trajectories is always at least the hyperbolic volume. The proof combines known theorems in Morse theory with lemmas of Gromov about simplicial volumes of stratified spaces.
description: 18 pages, 3 figures
MS Gr. class. c. 2 294
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 307 col. 9. Chrysippus, Quaestiones logicae
Drawing by Carlo Orazi