cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Revisiting the Second Law and Weak Cosmic Censorship Conjecture in High-Dimensional Charged-AdS Black Hole: an Additional Assumption
Creators: name: Ali, Md Sabir
name: Moumni, Hasan El
name: Khalloufi, Jamal
name: Masmar, Karima
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The verification of the second law of black hole mechanics and the WCCC in the context of enthalpy as mass of the black hole and its related thermodynamic properties has not been tested through a vast number of literature in the recent past. Such studies are of great physical importance as they provide us with a large number of information regarding the thermodynamics and the dynamics of AdS black hole systems. We invest the prior limited surveys of such analysis to investigate the WCCC for the $D$- dimensional asymptotically AdS-charged black holes characterized by its mass ($M$), electric charge ($Q$), and AdS radius ($l$) under the absorption of scalar particles of charge $q$. We examine the WCCC by analyzing the energy-momentum condition of the electrically charged particles as absorbed by the black holes. We prove that the conjecture is well verified irrespective of whether the initial black hole configurations are extremal or non-extremal by changing its charge, the AdS radius, and their variations. We show that the first law and the WCCC are valid for all spacetime dimensions ($D$) independent of the choice of the parameters characterizing the black holes. But to verify the second law in the extremal and non-extremal configurations one has to be very cautious as it gets strongly affected by the choices of the values of the black hole parameters and their variations... In the context of the extended phase space, taking the grand canonical potential into account allow us to obtain the missing information about the variation of the cosmological constant necessary to construct the extended phase space, namely the notion of the black hole pressure, and which is absent in the previous literature so far.
description: 51 pages and 32 figures. Text improved and references updated
Kontextbasierter Wortschatzerwerb - Lehren, Lernen und Prüfen von Wörtern im Kontext
Creators: name: Beyer, Andrea
Publisher: name: Zenodo
Year: 2023
Subjects: Latin language
vocabulary acquisition
data-driven learning
language learning

description: Vortrag im Rahmen einer Fortbildung für Lehrkräfte in Berlin und Brandenburg im September 2023
description: Funded by the German Research Foundation (DFG), project number 316618374
Geodesics and nodal sets of Laplace eigenfunctions on hyperbolic manifolds
Creators: name: Judge, Chris
name: Mondal, Sugata
Publisher: name: arXiv
Year: 2016
Subjects: subject: Differential Geometry (math.DG)
subject: Spectral Theory (math.SP)
subject: FOS: Mathematics
subject: 58J50, 22E40

description: Let X be a manifold equipped with a complete Riemannian metric of constant negative curvature and finite volume. We demonstrate the finiteness of the collection of totally geodesic immersed hypersurfaces in X that lie in the zero-level set of some Laplace eigenfunction. For surfaces, we show that the number can be bounded just in terms of the area of the surface. We also provide constructions of geodesics in hyperbolic surfaces that lie in a nodal set but that do not lie in the fixed point set of a reflection symmetry.
description: Final version, 9 pages, 2 figures
Tagetes filifolia Lagasca 1816
Creators: name: Schiavinato, Dario J.
name: Bartoli, Adriana
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Asterales
Asteraceae
Tagetes
Tagetes filifolia

description: Tagetes filifolia Lag.
 ARGENTINA. Córdoba: Punilla department, Provincial route 34 km 43, 2127 m, 31º 37.121´S 64º 51.408´W, 24 February 2016, D. Schiavinato et al. 131/2016 (BAA). Jujuy: Cochinoca department, National Route 9 Km 1910,5 between Abra Pampa and La Quiaca, 3490 m, 22º 38´37.7´´S 65º 41´57.7´´W, 12 March 2018, D. Schiavinato et al. 65/2018 (BAA). Salta: Chicoana department, Puente El Maray, 2201 m, 25º 10´46.60´´S 65º 46´37.17´´W, 20 February 2016, D. Schiavinato et al. 104/2016 (BAA). Tucumán: Tafí del Valle department, Provincial route 307, canyon between Carapunco and La Bolsa, 3011 m, 26º 45.873´S 65º 44.173´W, 18 February 2016, D. Schiavinato et al. 86/2016 (BAA).
description: Published as part of Schiavinato, Dario J. & Bartoli, Adriana, 2018, About the identity of Tagetes pauciloba (Asteraceae, Tageteae), pp. 200-210 in Phytotaxa 362 (2) on page 206, DOI: 10.11646/phytotaxa.362.2.6, http://zenodo.org/record/13702940
MS Gr. class. c. 3 600
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1014 Subscriptio. Demetrius Laco, De poematis 2
Drawing by Giuseppe (?) Casanova
Tension between implications from PREX-2 data and gravitational tidal response on dense matter equation of state
Creators: name: Thapa, Vivek Baruah
name: Sinha, Monika
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Recently an improved value of neutron skin thickness of $^{208}\text{Pb}$ was reported in Lead Radius EXperiment-2 (PREX-2) to be $R_{\text{skin}}=R_n - R_p=(0.283\pm 0.071)$ fm which corresponds to high estimations of nuclear symmetry energy ($E_{\text{sym}}$) and its slope ($L_{\text{sym}}$). The updated values of $E_{\text{sym}}$ and $L_{\text{sym}}$ commensurating to the neutron star observable estimations lie exterior to the astrophysical observed range. The higher values of $L_{\text{sym}}$ at $n_0$ deduced from recent PREX-2 data correlates to matter being easily deformable (yielding higher radius values) around intermediate matter densities leading to higher values of $\tildeΛ$ creating a tension between the terrestrial and astrophysical observations. In this study, we exploit this tension to constrain the $Δ$-scalar meson coupling parameter space.
description: 6 pages, 3 figures. Conference proceeding of the "Nuclear Physics in Astrophysics-X 2022". To appear in EPJ Web of Conferences
Preserving history in motion: using oral history to preserve and enhance the memory of a National Hockey League team and of the individual players
Creators: name: Hollinger, Hillary
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2014
Subjects: Hockey--History
Sports--History
Oral history

description: This study describes a questionnaire survey of the Carolina Hurricanes fan base. The survey was conducted to establish fan interest in oral histories of the Carolina Hurricanes team and staff. 167 responses were received and analyzed. Participants answered three multiple-choice questions and two free-response questions offering opinions about the current state of the identity and team memory of the Carolina Hurricanes. It was determined that fans want more than what is being currently documented and presented as the history of the team. Desired types of information include greater fan recognition and inclusion, team history, and celebration of existence in a non-traditional market, all of which can be effectively captured by oral histories.
MS Gr. class. c. 3 601
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1014 col. 44. Demetrius Laco, De poematis 2
Drawing by Giuseppe (?) Casanova
On the Meaning of Averages in Genome-wide Association Studies: What Should Come Next?
Creators: name: Rauch, Cyril
name: Wattis, Jonathan
name: Bray, Sian
Publisher: name: Organisms
Year: 2023

description: Despite the interest shown in the concept of gratitude over the last decade, there is no agreement on its definition and underlying dimensions. This paper provides a critical review of the definitions of gratitude and other similar constructs. A total of 22 definitions for gratitude were identified. The identified definitions were analyzed against each other for their commonality and differences. After highlighting the lacunae, lack of consensus, and overlap among the available definitions of gratitude, this paper differentiates gratitude from other similar constructs.
description: Organisms, Vol 6, No 1 (2023)
Spatial gradient consistency for unsupervised learning of hyperspectral demosaicking: Application to surgical imaging
Creators: name: Li, Peichao
name: Asad, Muhammad
name: Horgan, Conor
name: MacCormac, Oscar
name: Shapey, Jonathan
name: Vercauteren, Tom
Publisher: name: arXiv
Year: 2023
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Hyperspectral imaging has the potential to improve intraoperative decision making if tissue characterisation is performed in real-time and with high-resolution. Hyperspectral snapshot mosaic sensors offer a promising approach due to their fast acquisition speed and compact size. However, a demosaicking algorithm is required to fully recover the spatial and spectral information of the snapshot images. Most state-of-the-art demosaicking algorithms require ground-truth training data with paired snapshot and high-resolution hyperspectral images, but such imagery pairs with the exact same scene are physically impossible to acquire in intraoperative settings. In this work, we present a fully unsupervised hyperspectral image demosaicking algorithm which only requires exemplar snapshot images for training purposes. We regard hyperspectral demosaicking as an ill-posed linear inverse problem which we solve using a deep neural network. We take advantage of the spectral correlation occurring in natural scenes to design a novel inter spectral band regularisation term based on spatial gradient consistency. By combining our proposed term with standard regularisation techniques and exploiting a standard data fidelity term, we obtain an unsupervised loss function for training deep neural networks, which allows us to achieve real-time hyperspectral image demosaicking. Quantitative results on hyperspetral image datasets show that our unsupervised demosaicking approach can achieve similar performance to its supervised counter-part, and significantly outperform linear demosaicking. A qualitative user study on real snapshot hyperspectral surgical images confirms the results from the quantitative analysis. Our results suggest that the proposed unsupervised algorithm can achieve promising hyperspectral demosaicking in real-time thus advancing the suitability of the modality for intraoperative use.
The Impact of Patient Internet Information On the Doctor-Patient Relationship
Creators: name: Merrill, Cynthia
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2002
Subjects: Internet searching
Medical information
Attitudes toward computers
Physician-patient relations
Patient education

description: The behaviors and attitudes of primary care doctors and their patients were investigated regarding the use of Internet information in their communications. Twelve providers and 113 patients were interviewed regarding their use of the Internet and their views of how its use affects their day-to-day relationships. Relationships between the amount of computer use and medical searching, as well as between information brought by the patient and changes in the plan of treatment, or education that took place were examined.  None of the patients brought in information on paper to their doctors, possibly suggesting a reluctance to threaten the relationship. Patients with chronic illnesses were more likely to be satisfied with their search for Internet information. Patients who felt that their doctors were more "inclusive" of them in their decisions were more likely to bring in information and be pleased with the response of the doctor.
Reduction Arguments for Geometric Inequalities Associated With Asymptotically Hyperboloidal Slices
Creators: name: Cha, Ye Sle
name: Khuri, Marcus
name: Sakovich, Anna
Publisher: name: arXiv
Year: 2015
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We consider several geometric inequalities in general relativity involving mass, area, charge, and angular momentum for asymptotically hyperboloidal initial data. We show how to reduce each one to the known maximal (or time symmetric) case in the asymptotically flat setting, whenever a geometrically motivated system of elliptic equations admits a solution.
description: 30 pages; final version
Review On Laser Induced Breakdown spectroscopy: Methodology and Technical Developments
Creators: name: Thomas, Jinto
name: Joshi, Hem Chandra
Publisher: name: arXiv
Year: 2023
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: In this review we attempt to provide a brief account of laser induced breakdown spectroscopy (LIBS) methodology and technological developments. We also summarise various methods adopted for exploiting LIBS. Besides, a brief overview of combination of LIBS in conjunction with other methods is also given.
MS Gr. class. c. 3 602
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1014 col. 45. Demetrius Laco, De poematis 2
Drawing by Giuseppe (?) Casanova
What Happens with the Mind when the Brain Dies?
Creators: name: Gomez-Marin, Alex
Publisher: name: Organisms
Year: 2023

description: A neuroscientist reflects on his near-death experience to ponder the nature of the human mind and the survival of consciousness after death. Ancient traditions, manifold personal experiences, nuanced philosophical views, and recent scientific evidence, all point to the brain as a filter (or receiver) of consciousness rather than its fanciful producer. No doubt, good-old-fashioned materialists —nowadays rebranded as physicalists, crypto-dualists, or illusionists wearing virtual reality goggles— insist that minds are “nothing but” what brains do. Nevertheless, a trans-materialist science can expand the scope and depth of the answers (and the questions) that really matter not only to science but also to human flourishing.
description: Organisms, Vol 6, No 1 (2023)
An Empirical Study on OCLC Catalog Record Errors for the Copy Cataloging of Chinese Monographs
Creators: name: Jia, Bin
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2007
Subjects: OCLC database record evaluation
Copy cataloging of Chinese monographs

description: This paper explores and analyzes the errors in the sampled catalog records of Chinese monographs in the OCLC database. The author examined the errors by content, frequency, type and MARC field location to study the effect on both copy cataloging activities and library patrons' access to an online catalog record. Finally, a number of recommendations are proposed for future research and error decreasing measures.
Compensating for Sensing Failures via Delegation in Human-AI Hybrid Systems
Creators: name: Fuchs, Andrew
name: Passarella, Andrea
name: Conti, Marco
Publisher: name: arXiv
Year: 2023
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Given an increasing prevalence of intelligent systems capable of autonomous actions or augmenting human activities, it is important to consider scenarios in which the human, autonomous system, or both can exhibit failures as a result of one of several contributing factors (e.g. perception). Failures for either humans or autonomous agents can lead to simply a reduced performance level, or a failure can lead to something as severe as injury or death. For our topic, we consider the hybrid human-AI teaming case where a managing agent is tasked with identifying when to perform a delegation assignment and whether the human or autonomous system should gain control. In this context, the manager will estimate its best action based on the likelihood of either (human, autonomous) agent failure as a result of their sensing capabilities and possible deficiencies. We model how the environmental context can contribute to, or exacerbate, the sensing deficiencies. These contexts provide cases where the manager must learn to attribute capabilities to suitability for decision-making. As such, we demonstrate how a Reinforcement Learning (RL) manager can correct the context-delegation association and assist the hybrid team of agents in outperforming the behavior of any agent working in isolation.
The use of online periodical databases in the secondary school setting: a case study
Creators: name: Sarraino, Timothy M.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1999
Subjects: School libraries--automation
Online searching--Evaluation
Full-text databases--evaluation

description: The purpose of this case study was to determine how one particular school uses online periodical databases and how the products they have compare to similar products available. The case study involved one high school in North Carolina that has a reputation for having an outstanding program. The study involved informal observations as well as a small use study. Two students participated in the use study. A discussion of the findings suggest methods to assist the media specialist in using the online periodical database to its fullest potential while providing students with the skills necessary to thrive in our modern technological world. In addition, the findings point to ways these resources can be incorporated throughout the entire school curriculum due to greater media center involvement.
Visual Analytics of Neuron Vulnerability to Adversarial Attacks on Convolutional Neural Networks
Creators: name: Li, Yiran
name: Wang, Junpeng
name: Fujiwara, Takanori
name: Ma, Kwan-Liu
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Cryptography and Security (cs.CR)
subject: Human-Computer Interaction (cs.HC)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Adversarial attacks on a convolutional neural network (CNN) -- injecting human-imperceptible perturbations into an input image -- could fool a high-performance CNN into making incorrect predictions. The success of adversarial attacks raises serious concerns about the robustness of CNNs, and prevents them from being used in safety-critical applications, such as medical diagnosis and autonomous driving. Our work introduces a visual analytics approach to understanding adversarial attacks by answering two questions: (1) which neurons are more vulnerable to attacks and (2) which image features do these vulnerable neurons capture during the prediction? For the first question, we introduce multiple perturbation-based measures to break down the attacking magnitude into individual CNN neurons and rank the neurons by their vulnerability levels. For the second, we identify image features (e.g., cat ears) that highly stimulate a user-selected neuron to augment and validate the neuron's responsibility. Furthermore, we support an interactive exploration of a large number of neurons by aiding with hierarchical clustering based on the neurons' roles in the prediction. To this end, a visual analytics system is designed to incorporate visual reasoning for interpreting adversarial attacks. We validate the effectiveness of our system through multiple case studies as well as feedback from domain experts.
description: Accepted by the Special Issue on Human-Centered Explainable AI, ACM Transactions on Interactive Intelligent Systems
Development of holmium-163 electron-capture spectroscopy with transition-edge sensors
Creators: name: Croce, M. P.
name: Rabin, M. W.
name: Mocko, V.
name: Kunde, G. J.
name: Birnbaum, E. R.
name: Bond, E. M.
name: Engle, J. W.
name: Hoover, A. S.
name: Nortier, F. M.
name: Pollington, A. D.
name: Taylor, W. A.
name: Weisse-Bernstein, N. R.
name: Wolfsberg, L. E.
name: Hays-Wehle, J. P.
name: Schmidt, D. R.
name: Swetz, D. S.
name: Ullom, J. N.
name: Barnhart, T. E.
name: Nickles, R. J.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Calorimetric decay energy spectroscopy of electron-capture-decaying isotopes is a promising method to achieve the sensitivity required for electron neutrino mass measurement. The very low total nuclear decay energy (QEC < 3 keV) and short half-life (4570 y) of 163Ho make it attractive for high-precision electron capture spectroscopy (ECS) near the kinematic endpoint, where the neutrino momentum goes to zero. In the ECS approach, an electron-capture-decaying isotope is embedded inside a microcalorimeter designed to capture and measure the energy of all the decay radiation except that of the escaping neutrino. We have developed a complete process for proton-irradiation-based isotope production, isolation, and purification of 163Ho. We have developed transition-edge sensors for this measurement and methods for incorporating 163Ho into high-resolution microcalorimeters, and have measured the electron-capture spectrum of 163Ho. We present our work in these areas and discuss the measured spectrum and its comparison to current theory.
description: Updated with corrected notation for atomic states
Implications of LIS Instructors' E-resource Selections for Student Privacy Interests and Academic Library Values
Creators: name: Kaplan, B.J.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2014
Subjects: Library education
Information science--Study & teaching
Privacy

description: This paper reviews materials from Fall 2013 courses and others at the School of Information and Library Science at the University of North Carolina-Chapel Hill to assess (a) how students' privacy interests were affected by instructors' choice of electronic resources and (b) the extent to which instructors utilized university libraries as a means through which to access resources.
Instructors choose resources and means of access that compromise students' privacy interests; students are directed to access third party websites, thereby agreeing to these websites' privacy policies and terms of service, which results in these websites inserting dataveillance mechanisms into students' computers' and continuously harvesting their personal information Nor do instructors seem to utilize University Libraries as a resource to the greatest extent possible, thus impeding University Libraries' ability to assess value.
MS Gr. class. c. 3 603
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1014 col. 38 col. 39. Demetrius Laco, De poematis 2
Drawing by Giuseppe (?) Casanova
Millennials' Approach to Preserving Digital Photographic Collections
Creators: name: Rayman, Jessica
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2017
Subjects: Personal Photograph Management
Photographs--Conservation & restoration
Digital Photography

description: Cameras are included as a standard piece of equipment on many electronic devices, which make it increasingly easier for people to document their lives with photographs as moments occur. As a result, personal photographic collections continue to grow in size, and assume a wealth of complications related to an individual’s ability to manage the size of their collection and considerations for preservation. The purpose of this study is to determine the long-term preservation techniques of the personal digital photographic collections of the Millennial Generation, and to inform archivists and others involved with memory institutions about the ways this generation thinks and acts upon the preservation of these collections. The population for this study was chosen using a non-probability, convenience sample of students and employees between the ages of 18 and 37 at the University of North Carolina at Chapel Hill. The data was collected using an anonymous multiple-choice survey.
Towards Usable Parental Control for Voice Assistants
Creators: name: Yang, Peiyi
name: Fan, Jie
name: Wei, Zice
name: Li, Haoqian
name: Le, Tu
name: Tian, Yuan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Cryptography and Security (cs.CR)
subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: Voice Personal Assistants (VPA) have become a common household appliance. As one of the leading platforms for VPA technology, Amazon created Alexa and designed Amazon Kids for children to safely enjoy the rich functionalities of VPA and for parents to monitor their kids' activities through the Parent Dashboard. Although this ecosystem is in place, the usage of Parent Dashboard is not yet popularized among parents. In this paper, we conduct a parent survey to find out what they like and dislike about the current parental control features. We find that parents need more visuals about their children's activity, easier access to security features for their children, and a better user interface. Based on the insights from our survey, we present a new design for the Parent Dashboard considering the parents' expectations.
Virtual Management: Trials and Tribulations
Creators: name: McDaniel, Christie L.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2007
Subjects: Age by role
Management--Face-to-face
Gender by role
Teams--Management
Management--Virtual

description: This study analyzes the differences in virtual and face-to-face team management. It tries to find similarities and differences between the two types of teams. It seeks to find out whether or not managers are trained to lead these teams and to identify the preferred method of work by employees: virtual work or work in a physical, face-to-face environment. Members of two professional listservs (the North Carolina Project Management Institute and the American Society for Information Science and Technology) were sent links to an online survey. Participants were practitioners and worked on or managed virtual teams at least fifty percent of the time. The survey found that most virtual workers do not get trained to work virtually; furthermore, there is nearly a 50/50 split on work place preference (virtual or face-to-face) among virtual workers. It was also found that the most common complaint about virtual work is related to communication difficulties. Finally, the survey found that the younger the virtual worker, the more likely they are to be closely monitored by their manager.
D5. Best practicces recommendations
Creators: name: Pezlar, Ivan
name: Rindošová, Simona
Publisher: name: Zenodo
Year: 2022
Subjects: Best practices
project management
financial management

description: This document states recommendations and best practices divided to several chapters such as project preparation, project management and financial management using the body of evidence established via the two on-job trainings of administrative staff which took place at two partner universities - Technical University in Munich (TUM) and University of Zurich (UZH).
Conservative and semiconservative random walks: recurrence and transience
Creators: name: Abramov, Vyacheslav M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Probability (math.PR)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 60G50, 60J80, 60C05, 60K25

description: In the present paper we define conservative and semiconservative random walks in $\mathbb{Z}^d$ and study different families of random walks. The family of symmetric random walks is one of the families of conservative random walks, and simple (Pólya) random walks are their representatives. The classification of random walks given in the present paper enables us to provide a new approach to random walks in $\mathbb{Z}^d$ by reduction to birth-and-death processes. We construct nontrivial examples of recurrent random walks in $\mathbb{Z}^d$ for any $d\geq3$ and transient random walks in $\mathbb{Z}^2$.
description: Dear readers. Together with the paper published in "Journal of Theoretical Probability" I added a correction. The correction is related to Lemma 4.1 of the paper. The corrected version of Lemma 4.1 is of independent interest. Now, the revised version of correction is published in the same journal "Journal of Theoretical Probability" https://doi.org/10.1007/s10959-018-0871-8
Ionization of atoms by slow heavy particles, including dark matter
Creators: name: Roberts, B. M.
name: Flambaum, V. V.
name: Gribakin, G. F.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Atoms and molecules can become ionized during the scattering of a slow, heavy particle off a bound electron. Such an interaction involving leptophilic weakly interacting massive particles (WIMPs) is a promising possible explanation for the anomalous 9 sigma annual modulation in the DAMA dark matter direct detection experiment [R. Bernabei et al., Eur. Phys. J. C 73, 2648 (2013)]. We demonstrate the applicability of the Born approximation for such an interaction by showing its equivalence to the semiclassical adiabatic treatment of atomic ionization by slow-moving WIMPs. Conventional wisdom has it that the ionization probability for such a process should be exponentially small. We show, however, that due to nonanalytic, cusp-like behaviour of Coulomb functions close to the nucleus this suppression is removed, leading to an effective atomic structure enhancement. Crucially, we also show that electron relativistic effects actually give the dominant contribution to such a process, enhancing the differential cross section by up to 1000 times.
description: 7 pages, 2 figures. Added Appendix
Superconductivity above 70 K observed in lutetium polyhydrides
Creators: name: Li, Zhiwen
name: He, Xin
name: Zhang, Changling
name: Lu, Ke
name: Min, Baosen
name: Zhang, Jun
name: Zhang, Sijia
name: Zhao, Jianfa
name: Shi, Luchuan
name: Feng, Shaomin
name: Wang, Xiancheng
name: Peng, Yi
name: Yu, Richeng
name: Wang, Luhong
name: Li, Yingzhe
name: Bass, Jay D
name: Prakapenka, Vitali
name: Chariton, Stella
name: Liu, Haozhe
name: Jin, Changqing
Publisher: name: arXiv
Year: 2023
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The binary polyhydrides of heavy rare earth lutetium that shares a similar valence electron configuration to lanthanum have been experimentally discovered to be superconductive. The lutetium polyhydrides were successfully synthesized at high pressure and high temperature conditions using a diamond anvil cell in combinations with the in-situ high pressure laser heating technique. The resistance measurements as a function of temperature were performed at the same pressure of synthesis in order to study the transitions of superconductivity (SC). The superconducting transition with a maximum onset temperature (Tc) 71 K was observed at pressure of 218 GPa in the experiments. The Tc decreased to 65 K when pressure was at 181 GPa. From the evolution of SC at applied magnetic fields, the upper critical field at zero temperature μ0Hc2(0) was obtained to be ~36 Tesla. The in-situ high pressure X-ray diffraction experiments imply that the high Tc SC should arise from the Lu4H23 phase with Pm-3n symmetry that forms a new type of hydrogen cage framework different from those reported for previous light rare earth polyhydride superconductors.
MS Gr. class. c. 3 604
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1014 col. 36 col. 37. Demetrius Laco, De poematis 2
Drawing by Giuseppe (?) Casanova
Jacobi no-core shell model for p-shell nuclei
Creators: name: Liebig, S.
name: Meißner, U. -G.
name: Nogga, A.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We introduce an algorithm to obtain coefficients of fractional parentage for light $p$-shell nuclei. The coefficients enable to use Jacobi coordinates in no-core shell model calculations separating off the center-of-mass motion. Fully antisymmetrized basis states are given together with recoupling coefficients that allow one to apply two- and three-nucleon operators. As an example, we study the dependence on the harmonic oscillator frequency of $^3$H, $^4$He, $^6$He, $^6$Li and $^7$Li and extract their binding and excitation energies. The coefficients will be made openly accessible as HDF5 data files.
description: 23 pages, 17 figures
Possible expansion of blood vessels by means of the electrostrictive effect
Creators: name: Brevik, Iver
Publisher: name: arXiv
Year: 2023
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: In cases when it is desirable to transport medication through blood vessels, especially when dealing with brain cancer being confronted with the narrow arteries in the brain, the blood-brain barrier makes the medical treatment difficult. There is a need of expanding the diameters of the arteries in order to facilitate the transport of medicaments. Recent research has pointed to various ways to improve this situation; in particular, the use ultrasound acting on microbubbles in the blood stream has turned out to be a promising option. Here, a different possibility of enlarging the diameters of arteries is discussed, namely to exploit the electrostrictive pressure produced by internal strong, ultrashort and repetitive laser pulses. Each pulse will at first give rise to inward directed optical forces, and once the pulse terminates there will be a hydrodynamical bouncing flow in the outward radial direction giving an outward impulse to the vessel wall. In the absence of friction a symmetric oscillation picture emerges. Clearly, a supply of repetitive pulses will be needed (at parametric resonance) to make the effect appreciable. The effect has to our knowledge not been discussed before. We give an approximate optical and hydrodynamical theory of it. The calculations indicate promising results for the wall pressure, although experimental work is desirable to show whether the idea can be useful in practice. Our calculation is made from a general physical perspective, not necessarily linked to medical applications.
description: 19 pages, latex 2e, no figures. To appear in Symmetry
Origin of optical losses in gallium arsenide disk whispering gallery resonators
Creators: name: Parrain, David
name: Baker, Christophe
name: Wang, Guillaume
name: Guha, Biswarup
name: Santos, Eduardo Gil
name: Lemaitre, Aristide
name: Senellart, Pascale
name: Leo, Giuseppe
name: Ducci, Sara
name: Favero, Ivan
Publisher: name: arXiv
Year: 2015
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Whispering gallery modes in GaAs disk resonators reach half a million of optical quality factor. These high Qs remain still well below the ultimate design limit set by bending losses. Here we investigate the origin of residual optical dissipation in these devices. A Transmission Electron Microscope analysis is combined with an improved Volume Current Method to precisely quantify optical scattering losses by roughness and waviness of the structures, and gauge their importance relative to intrinsic material and radiation losses. The analysis also provides a qualitative description of the surface reconstruction layer, whose optical absorption is then revealed by comparing spectroscopy experiments in air and in different liquids. Other linear and nonlinear optical loss channels in the disks are evaluated likewise. Routes are given to further improve the performances of these miniature GaAs cavities.
description: 18 pages
Properties of the non-linear Holstein polaron at finite doping and temperature
Creators: name: Li, Shaozhi
name: Nowadnick, E. A.
name: Johnston, S.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We use determinant quantum Monte Carlo to study the single particle properties of quasiparticles and phonons in a variant of the two-dimensional Holstein model that includes an additional non-linear electron-phonon (e-ph) interaction. We find that a small positive non-linear interaction reduces the effective coupling between the electrons and the lattice, suppresses charge-density wave (CDW) correlations, and hardens the effective phonon frequency. Conversely, a small negative non-linear interaction can enhance the e-ph coupling resulting in heavier quasiparticles, an increased tendency towards a CDW phase at all fillings, and a softened phonon frequency. An effective linear model with a renormalized interaction strength and phonon frequency can qualitatively capture this physics; however, the quantitative effects of the non-linearity on both the electronic and phononic degrees of freedom cannot be captured by such a model. These results are significant for typical non-linear coupling strengths found in real materials, indicating that non-linearity can have a significant influence on the physics of many e-ph coupled systems.
description: We have 12 pages and 13 figures
MS Gr. class. c. 3 605
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1014 col. 46 col. 47. Demetrius Laco, De poematis 2
Drawing by Giuseppe (?) Casanova
Nomadic Sharing: Information Infrastructures in the Sharing Economy
Creators: name: Sutherland-Keller, William
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2017
Subjects: Information infrastructures
Computer-supported cooperative work

description: This research examined the role of information infrastructures in decentralized contexts of the sharing economy. The community studied was a group of nomadic workers known as digital nomads. An investigation of three online forums was conducted and elements of emergence and generativity were identified in the community’s patterns of sharing and access across information infrastructure.
An analogue of row removal for diagrammatic Cherednik algebras
Creators: name: Bowman, Chris
name: Speyer, Liron
Publisher: name: arXiv
Year: 2016
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 20C30, 20C08, 05E10

description: We prove an analogue of James-Donkin row removal theorems for arbitrary diagrammatic Cherednik algebras. This is one of the first results concerning the (graded) decomposition numbers of these algebras over fields of arbitrary characteristic. As a special case, our results yield a new reduction theorem for graded decomposition numbers and extension groups for cyclotomic q-Schur algebras.
description: v4: Final version, to appear in Math. Z
The Giant Radio Array for Neutrino Detection (GRAND) Project
Creators: name: Kotera, K.
name: Álvarez-Muñiz, J.
name: Batista, R. A.
name: Benoit-Lévy, A.
name: Bolmont, J.
name: Brans, H.
name: Bustamante, M.
name: Charrier, D.
name: Cheng, L.
name: Chiche, S.
name: Dai, Z.
name: Almeida, R. M. De
name: Decoene, V.
name: Denton, P. B.
name: Errico, B. De
name: De Jong, S.
name: Mello Neto, J. R. T. De
name: De Vries, K. D.
name: Duan, K.
name: Duan, R.
name: Engel, R.
name: Fan, Y.
name: Fang, K.
name: Gou, Q.
name: Gu, J.
name: Guépin, C.
name: Guo, J.
name: Guo, Y.
name: Habraken, R.
name: Haungs, A.
name: He, H.
name: Hivon, E.
name: Hu, H.
name: Huang, X.
name: Huang, Y.
name: Huege, T.
name: Oliveira, M. I.
name: Jiang, W.
name: Koirala, R.
name: Zhou, H.
name: Lago, B. L.
name: Le Coz, S.
name: Lenain, J.-P.
name: Liu, B.
name: Liu, C.
name: Liu, R.
name: Liu, W.
name: Ma, P.
name: Martineau-Huynh, O.
name: Mostafá, M.
name: Mottez, F.
name: Mouette, J.
name: Murase, K.
name: Niess, V.
name: Oikonomou, F.
name: Ou, Z.
name: Pierog, T.
name: Piotrowski, L. W.
name: Prunet, S.
name: Qian, X.
name: Rens, I. Van
name: Romei, V. R.
name: Roth, M.
name: Schüssler, F.
name: Szálas-Motesiczky, D.
name: Tacken, J.
name: Timmermans, A.
name: Timmermans, C.
name: Tueros, M.
name: Wang, R.
name: Wang, S.
name: Wang, X.
name: Wang, X.
name: Watanabe, C.
name: Wei, D.
name: Wei, F.
name: Wijnen, T.
name: Wu, X.
name: Wu, X.
name: Xu, X.
name: Xu, X.
name: Yang, L.
name: Yang, X.
name: Yuan, Q.
name: Zarka, P.
name: Zeng, H.
name: Zhang, B. T.
name: Zhang, C.
name: Zhang, J.
name: Zhang, K.
name: Zhang, P.
name: Zhang, S.
name: Zhang, Y.
name: GRAND
Publisher: name: Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Year: 2022

description: The GRAND project aims to detect ultra-high-energy neutrinos, cosmic rays and gamma rays, with an array of 200,000 radio antennas over 200,000km$^2$, split into ∼20 sub-arrays of ∼10,000km$^2$ deployed worldwide. The strategy of GRAND is to detect air showers above 10$^{17}$\,eV that are induced by the interaction of ultra-high-energy particles in the atmosphere or in the Earth crust, through its associated coherent radio-emission in the 50−200\,MHz range. In its final configuration, GRAND plans to reach a neutrino-sensitivity of ∼10$^{−10}$GeVcm$^{−2}$s$^{−1}$sr$^{−1}$ above 5×10$^{17}$\,eV combined with a sub-degree angular resolution. GRANDProto300, the 300-antenna pathfinder array, is planned to start data-taking in 2021. It aims at demonstrating autonomous radio detection of inclined air-showers, and study cosmic rays around the transition between Galactic and extra-Galactic sources. We present preliminary designs and simulation results, plans for the ongoing, staged approach to construction, and the rich research program made possible by the proposed sensitivity and angular resolution.
On the Covering Fraction Variability in an EUV Mini-BAL Outflow from PG 1206+459
Creators: name: Muzahid, Sowgat
name: Srianand, Raghunathan
name: Charlton, Jane
name: Eracleous, Michael
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report on the first detection of extreme-ultraviolet (EUV) absorption variability in the NeVIII 770,780 mini-broad absorption line (mini-BAL) in the spectrum of the quasar (QSO) PG 1206+459. The observed equivalent width (EW) of the NeVIII doublet show a ~4 sigma variation over a timescale of 2.8 months in the QSO's rest-frame. Both members of the NeVIII doublet exhibit non-black saturation, indicating partial coverage of the continuum source. An increase in the NeVIII covering fraction from f_c = 0.59\pm0.05 to 0.72\pm0.03 is observed over the same period. The NeVIII profiles are too highly saturated to be susceptible to changes in the ionization state of the absorbing gas. In fact, we do not observe any significant variation in the EW and/or column density after correcting the spectra for partial coverage. We, thus, propose transverse motions of the absorbing gas being the cause of the observed variability. Using a simple model of a transiting cloud we estimate a transverse speed of ~1800 km/s. For Keplerian motion, this corresponds to a distance between the absorber and the central engine of ~1.3 pc, which places the absorber just outside the BLR region. We further estimate a density of ~5\times10^6 cm^(-3) and a kinetic luminosity of ~10^43 - 10^44 erg/s. Such large kinetic powers suggest that outflows detected via EUV lines are potentially major contributors to AGN feedback.
description: Accepted for publication in the MNRAS after a moderate revision
MS Gr. class. c. 3 606
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1014 col. 49 col. 50. Demetrius Laco, De poematis 2
Drawing by Giuseppe (?) Casanova
Weaving a Web of Precious Materials: Hyperlinks to, from and between Some Special Collections Libraries
Creators: name: Belden, Diana M.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2006
Subjects: World Wide Web
Special collections
Library Web sites
College and university libraries

description: This paper examines the hyperlinks to, from and between 111 special collections libraries whose parent (university) libraries belong to the Association of Research Libraries (ARL). I collected inlinks using the Alta Vista search engine, and outlinks by hand. The resulting data was examined to determine outlink targets, and to test correlations between link counts and quality rankings, geographic proximity, and collection strengths. Most outlinks from these libraries go to universities, government agencies and commercial sites, usually to institutional or divisional home pages. Top outlinkers connect users to important sites, like the Library of Congress and the National Archives and Records Administration. ARL ranking of parent library shows a slight positive correlation with number of inlinks, but does not correlate with number of outlinks. Some geographic regions interlink more than others. Finally, these libraries could be linking to each other much more based on shared collection strengths.
Young Humans Make Change, Young Users Click: Creating Youth-Centered Networked Social Movements
Creators: name: Rezaei, Mina
name: Owens, Patsy Eubanks
Publisher: name: arXiv
Year: 2023
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: From the urbanists' perspective, the everyday experience of young people, as an underrepresented group in the design of public spaces, includes tactics they use to challenge the strategies which rule over urban spaces. In this regard, youth led social movements are a set of collective tactics which groups of young people use to resist power structures. Social informational streams have revolutionized the way youth organize and mobilize for social movements throughout the world, especially in urban areas. However, just like public spaces, these algorithm based platforms have been developed with a great power imbalance between the developers and users which results in the creation of non inclusive social informational streams for young activists. Social activism grows agency and confidence in youth which is critical to their development. This paper employs a youth centric lens, which is used in designing public spaces, for designing algorithmic spaces that can improve bottom up youth led movements. By reviewing the structure of these spaces and how young people interact with these structures in the different cultural contexts of Iran and the US, we propose a humanistic approach to designing social informational streams which can enhance youth activism.