cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Symmetric and antisymmetric constitutive tensors for bi-isotropic and bi-anisotropic media
Creators: name: Silva, Pedro D. S.
name: Casana, Rodolfo
name: Ferreira, Manoel M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Classical Physics (physics.class-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The Maxwell equations and the constitutive relations describe the classical propagation of electromagnetic waves in continuous matter. Here, we investigate the effects stemming from extended constitutive relations on the propagation of waves in bi-isotropic and bi-anisotropic media using a classical general approach based on the evaluation of dispersion relations and refractive indices. For the bi-anisotropic media, we specify two classes of magnetoelectric parameters represented by symmetric and antisymmetric tensors. The three cases examined have provided real and distinct refractive indices for two propagating modes, which implies birefringence. The propagating modes were also carried out in all cases. The anisotropy or birefringence effect, given by the rotatory power or phase difference, was evaluated in terms of the magnetoelectric parameters of the theory in each case. The propagation orthogonal to the vectors used to parametrize the symmetric and antisymmetric magnetoelectric tensors is described by distinct modes, representing a route to identify the kind of bi-anisotropic medium examined. The group velocity and Poynting vector were also evaluated for all the cases examined to discuss the energy propagation in these anisotropic media.
description: 20 pages, 2 columns, 7 figures. Accepted for publication in Physical Review A
Hippocamelus Leuckart 1816
Creators: name: Honacki, James H.
name: Kinman, Kenneth E.
name: Koeppl, James W.
Publisher: name: Zenodo
Year: 1982
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Artiodactyla
Cervidae
Hippocamelus

description: Hippocamelus Leuckart, 1816. Diss. Inaug. de Equo bisulco Molinae, p. 24. COMMENT: Included in Odocoileus by Haltenorth, 1963:44, 46. ISIS NUMBER: 5301419006010000000.
description: Published as part of James H. Honacki, Kenneth E. Kinman & James W. Koeppl, 1982, Order Artiodactyla, pp. 315-343 in Mammal Species of the World (1 st Edition), Lawrence, Kansas, USA :Alien Press, Inc. & The Association of Systematics Collections on page 322, DOI: 10.5281/zenodo.7352976
description: {"references": ["Haltenorth, T. 1963. Klassifikation der Saugetiere: Artiodactyla I. Handbuch der Zoologie, 8 (32): 1 - 167."]}
Cercopis vulnerata
Creators: name: Angelova, Radost
name: Gjonov, Ilia
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Cercopidae
Cercopis
Cercopis vulnerata

description: Cercopis vulnerata (Rossi, 1807)
Notes
Distribution map (Fig. 16 a) and habitus (Fig. 16 b).
Chresonymy: Triecphora vulnerata Illig. in Joakimov (1909)
Literature data: Sredna Gora Mts. (Joakimov 1909); Krupnik-Sandanski-Petrich Valley (Sander 1985).
New data: Western Stara planina Mts.; Rila Mts.; Strandzha Mts.; Southern Black Sea coast. Detailed occurrence data: Angelova and Gjonov (2024).
Phenology: April-July.
Altitudinal distribution: 0-1700 m a. s. l.
Host plant: Adults polyphagous on various tall herbs and grasses, Nymphs subterranean on Poaceae roots (Nickel 2003).
Additional notes: Rare in Bulgaria.
description: Published as part of Angelova, Radost & Gjonov, Ilia, 2024, Twenty-five-year mapping species of the superfamily Cercopoidea (Hemiptera, Auchenorrhyncha) in Bulgaria, pp. e 124720 in Biodiversity Data Journal 12 on page e124720, DOI: 10.3897/BDJ.12.e124720
A Systematic Literature Review of Embodied Augmented Reality Agents in Head-Mounted Display Environments
Creators: name: Norouzi, Nahal
name: Kim, Kangsoo
name: Bruder, Gerd
name: Erickson, Austin
name: Choudhary, Zubin
name: Li, Yifan
name: Welch, Greg
Publisher: name: The Eurographics Association
Year: 2020
Subjects: General and reference
Surveys and overviews
Computing methodologies
Mixed / augmented reality

description: Embodied agents, i.e., computer-controlled characters, have proven useful for various applications across a multitude of display setups and modalities. While most traditional work focused on embodied agents presented on a screen or projector, and a growing number of works are focusing on agents in virtual reality, a comparatively small number of publications looked at such agents in augmented reality (AR). Such AR agents, specifically when using see-through head-mounted displays (HMDs) as the display medium, show multiple critical differences to other forms of agents, including their appearances, behaviors, and physical-virtual interactivity. Due to the unique challenges in this specific field, and due to the comparatively limited attention by the research community so far, we believe that it is important to map the field to understand the current trends, challenges, and future research. In this paper, we present a systematic review of the research performed on interactive, embodied AR agents using HMDs. Starting with 1261 broadly related papers, we conducted an in-depth review of 50 directly related papers from 2000 to 2020, focusing on papers that reported on user studies aiming to improve our understanding of interactive agents in AR HMD environments or their utilization in specific applications. We identified common research and application areas of AR agents through a structured iterative process, present research trends, and gaps, and share insights on future directions.
description: ICAT-EGVE 2020 - International Conference on Artificial Reality and Telexistence and Eurographics Symposium on Virtual Environments
description: Avatars in Single and Multi User Experiences
description: 101
description: 111
description: Nahal Norouzi, Kangsoo Kim, Gerd Bruder, Austin Erickson, Zubin Choudhary, Yifan Li, and Greg Welch
description: CCS Concepts: General and reference --> Surveys and overviews; Computing methodologies --> Mixed / augmented reality
Arctic sea ice box model with 2-layer atmosphere
Creators: name: Camille Hankel
Publisher: name: Zenodo
Year: 2023
Subjects: box model
climate modeling
Arctic sea ice

description: toy_model.py contains the full model equations, physical constants used, and integration scheme. 2D_sweep_revisions.py is a driver file that calls functions from toy_model to sweep over two different model parameters simultaneously (i.e., testing all pairwise parameter combinations) using multi-threading. The default parameter values listed in 2D_sweep_revisions can also be used to run a single model simulation. All constants have been updated to match those used in the final version of the accepted manuscript.
ปัจจัยที่มีผลต่อประสิทธิผลการนำนโยบายด้านการรักษาและฟื้นฟูสมรรถภาพทางการแพทย์ของกรมการแพทย์ สู่การปฏิบัติ
Creators: name: อิสราภรณ์ สมสวย
Publisher: name: วารสารสหวิทยาการวิจัย: ฉบับบัณฑิตศึกษา
Year: 2023
Subjects: การนำนโยบายไปปฏิบัติ
นโยบายด้านการรักษาและฟื้นฟูสมรรถภาพทางการแพทย์
กรมการแพทย์
กระทรวงสาธารณสุข

description: วารสารสหวิทยาการวิจัย: ฉบับบัณฑิตศึกษา, 12, 1, 188-197
On the Use of Jumping Gestures for Immersive Teleportation in VR
Creators: name: Kruse, Lucie
name: Jung, Sungchul
name: Li, Richard
name: Lindeman, Robert
Publisher: name: The Eurographics Association
Year: 2020
Subjects: Teleportation
Virtual Reality
Locomotion Techniques
Jumping
Presence
Cybersickness
Usability
Gaze input
Controller input
Human centered computing
User studies
Virtual reality
Mixed / augmented reality

description: Virtual environments can be infinitely large, but users only have a limited amount of space in the physical world. One way to navigate within large virtual environments is through teleportation. Teleportation requires two steps: targeting a place and sudden shifting. Conventional teleportation uses a controller to point to a target position and a button press or release to immediately teleport the user to the position. Since the teleportation does not require physical movement, the user can explore the entire virtual environment. However, as this is supernatural and can lead to momentary disorientation, it can break the sense of presence, and thus degrade the overall virtual reality experience. To compensate for the downside of this technique, we explore the effects of a jumping gesture as a teleportation trigger. We conducted a study with two factors: 1) triggering method (Jumping and Standing), and 2) targeting method (Head-direction and Controller). We found that the conventional way of using a controller while standing showed better efficiency, the highest usability and lower cybersickness. Nevertheless, Jumping+ Controller invoked a high sense of engagement and fun, and therefore provides an interesting new technique, especially for VR games.
description: ICAT-EGVE 2020 - International Conference on Artificial Reality and Telexistence and Eurographics Symposium on Virtual Environments
description: Navigation in Virtual Environments
description: 113
description: 120
description: Lucie Kruse, Sungchul Jung, Richard Li, and Robert Lindeman
description: Keywords: Teleportation, Virtual Reality, Locomotion Techniques, Jumping, Presence, Cybersickness, Usability, Gaze-input, Controller-input; CCS Concepts: Human-centered computing --> User studies; Virtual reality; Mixed / augmented reality
Translation-like actions by $\mathbb{Z}$, the subgroup membership problem, and Medvedev degrees of effective subshifts
Creators: name: Carrasco-Vargas, Nicanor
Publisher: name: arXiv
Year: 2023
Subjects: subject: Dynamical Systems (math.DS)
subject: Combinatorics (math.CO)
subject: Group Theory (math.GR)
subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 37B10, 05C63, 20F65, 03D99

description: We show that every infinite, locally finite, and connected graph admitsa translation-like action by $\mathbb{Z}$, and that this action can be takento be transitive exactly when the graph has either one or two ends.The actions constructed satisfy $d(v,v\ast 1)\leq3$ for every vertex$v$. This strengthens a theorem by Brandon Seward. We also study the effective computability of translation-like actionson groups and graphs. We prove that every finitely generated infinitegroup with decidable word problem admits a translation-like actionby $\mathbb{Z}$ which is computable, and satisfies an extra condition whichwe call decidable orbit membership problem. As a nontrivial application of our results, we prove that for everyfinitely generated infinite group with decidable word problem, effectivesubshifts attain all $Π_{1}^{0}$ Medvedev degrees. This extends a classification proved by Joseph Miller for $\mathbb{Z}^{d},$ $d\geq1$.
description: Revised version, but with one important fix in the proof of Lemma 3.2
Unified quantification of nonclassicality and entanglement
Creators: name: Vogel, W.
name: Sperling, J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The nonclassicality of single-mode quantum states is studied in relation to the entanglement created by a beam splitter. It is shown that properly defined quantifications -- based on the quantum superposition principle -- of the amounts of nonclassicality and entanglement are strictly related to each other. This can be generalized to the amount of genuine multipartite entanglement, created from a nonclassical state by an N splitter. As a consequence, a single-mode state of a given amount of nonclassicality is fully equivalent, as a resource, to exactly the same amount of entanglement. This relation is also considered in the context of multipartite entanglement and multimode nonclassicality.
description: 6 pages, 2 figures
Arctic sea ice box model with 2-layer atmosphere
Creators: name: Camille Hankel
Publisher: name: Zenodo
Year: 2023
Subjects: box model
climate modeling
Arctic sea ice

description: See Version v2-final on the right for an updated version of the model used in the final publication toy_model.py contains the full model equations, physical constants used, and integration scheme. 2D_parameter_sweeps.py is a driver file that calls functions from toy_model to sweep over two different model parameters simultaneously (i.e., testing all pairwise parameter combinations) using multi-threading. The default parameter values listed in 2D_parameter_sweeps can also be used to run a single model simulation.
The sugar industry as a commodity system: An analysis of agricultural restructuring within the Australian sugar industry
Creators: name: Hungerford, Linda J
Publisher: name: CQUniversity
Year: 2022
Subjects: Agricultural economics
Sustainable agricultural development

description: During the course of the Twentieth Century the Australian sugar industry became increasingly regulated to such an extent that by the 1980s it was the most highly regulated industry in Australia. Since the 1980s pressures, both internal and external to the industry, have resulted in significant deregulation and subsequent restructuring. Internal pressures have resulted from the Australian government's adoption of economic rationalist polices in order to meet what it perceived to be the challenges of globalisation, as well as more localized factors such as prolonged periods of drought. Externally, declining terms of trade and increasing levels of competition are problematic. This thesis seeks to determine whether or not the Australian sugar industry's restructuring exercises are sufficient to meet the challenges presented by an increasingly globalised economy and fiercer international competition. In so doing it considers the role of the state and transnational capital. It also reflects upon the sustainability of the industry. In order to understand what is happening within the Australian sugar industry, the thesis engages the explanatory power of agricultural restructuring and globalization theory. Theoretically the thesis is informed but not determined by the globalization perspective developed by Le Heron (1993). It also incorporates insights derived from McMichael, Wiseman, and Lawrence. The thesis employs methodology derived from the combination of two different but complementary procedures, namely, commodity systems analysis as proposed and refined by Friedland (1984, 2001), and the commodity chain approach as described by Hopkins and Wallerstein (1986). The thesis concludes that while the Australian industry appears to be deregulating and restructuring according to global logic, if fully enacted according to the trajectory implied by the deregulatory process, some portions of the Australian industry may be rendered unsustainable.
Comparison of Audio and Visual Cues to Support Remote Guidance in Immersive Environments
Creators: name: Wu, Fei
name: Thomas, Jerald
name: Chinnola, Shreyas
name: Rosenberg, Evan Suma
Publisher: name: The Eurographics Association
Year: 2020
Subjects: Human centered computing
Virtual reality
Collaborative interaction

description: Collaborative virtual environments provide the ability for collocated and remote participants to communicate and share information with each other. For example, immersive technologies can be used to facilitate collaborative guidance during navigation of an unfamiliar environment. However, the design space of 3D user interfaces for supporting collaborative guidance tasks, along with the advantages and disadvantages of different immersive communication modalities to support these tasks, are not well understood. In this paper, we investigate three different methods for providing assistance (visual-only, audio-only, and combined audio/visual cues) using an asymmetric collaborative guidance task. We developed a novel experimental design and virtual reality scenario to evaluate task performance during navigation of a complex and dynamic environment while simultaneously avoiding observation by patrolling sentries. Two experiments were conducted: a dyadic study conducted at a large public event and a controlled lab study using a confederate. Combined audio/visual guidance cues were rated easier to use and more effectively facilitated the avoidance of sentries compared with the audio-only condition. The presented work has the potential to inform the design of future experiments and applications that involve communication modalities to support collaborative guidance tasks with immersive technologies.
description: ICAT-EGVE 2020 - International Conference on Artificial Reality and Telexistence and Eurographics Symposium on Virtual Environments
description: Navigation in Virtual Environments
description: 121
description: 130
description: Fei Wu, Jerald Thomas, Shreyas Chinnola, and Evan Suma Rosenberg
description: CCS Concepts: Human-centered computing --> Virtual reality; Collaborative interaction
Cosmology from the kinetic polarized Sunyaev Zel'dovich effect
Creators: name: Hotinli, Selim C.
name: Holder, Gilbert P.
name: Johnson, Matthew C.
name: Kamionkowski, Marc
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The cosmic microwave background (CMB) photons that scatter off free electrons in the large-scale structure induce a linear polarization pattern proportional to the remote CMB temperature quadrupole observed in the electrons' rest frame. The associated blackbody polarization anisotropies are known as the polarized Sunyaev Zel'dovich (pSZ) effect. Relativistic corrections to the remote quadrupole field give rise to a non-blackbody polarization anisotropy proportional to the square of the transverse peculiar velocity field; this is the kinetic polarized Sunyaev Zel'dovich (kpSZ) effect. In this paper, we forecast the ability of future CMB and galaxy surveys to detect the kpSZ effect, finding that a statistically significant detection is within the reach of planned experiments. We further introduce a quadratic estimator for the square of the peculiar velocity field based on a galaxy survey and CMB polarization. Finally, we outline how the kpSZ effect is a probe of cosmic birefringence and primordial non-Gaussianity, forecasting the reach of future experiments.
description: 24 pages, 11 figures, comments welcome, v2 matches the published version
วิถีชีวิตแม่แรงงานข้ามชาติที่คลอดบุตรน้ำหนักต่ำกว่าเกณฑ์
Creators: name: ศุภราภรณ์ ธรรมชาติ
Publisher: name: วารสารสหวิทยาการวิจัย: ฉบับบัณฑิตศึกษา
Year: 2023
Subjects: เมียนมา
แม่แรงงานข้ามชาติ
ทารกแรกคลอดน้ำหนักน้อย

description: วารสารสหวิทยาการวิจัย: ฉบับบัณฑิตศึกษา, 12, 1, 198-207
Does the Control Law Matter? Characterization and Evaluation of Control Laws for Virtual Steering Navigation
Creators: name: Brument, Hugo
name: Olivier, Anne-Hélène
name: Marchal, Maud
name: Argelaguet, Ferran
Publisher: name: The Eurographics Association
Year: 2020
Subjects: Human centered computing
Virtual reality
User studies

description: This paper aims to investigate the influence of the control law in virtual steering techniques, and in particular the speed update, on users' behaviour while navigating in virtual environments. To this end, we first propose to characterize existing control laws. Then, we designed a user study to evaluate the impact of the control law on users' behaviour and performance in a navigation task. Participants had to perform a virtual slalom while wearing a head-mounted display. They were following three different sinusoidal-like trajectory (with low, medium and high curvature) using a torso-steering navigation technique with three different control laws (constant, linear and adaptive). The adaptive control law, based on the biomechanics of human walking, takes into account the relation between speed and curvature. We propose a spatial and temporal analysis of the trajectories performed both in the virtual and the real environment. The results show that users' trajectories and behaviors were significantly affected by the shape of the trajectory but also by the control law. In particular, users' angular velocity was higher with constant and linear laws compared to the adaptive law. The analysis of subjective feedback suggests that these differences might result in a lower perceived physical demand and effort for the adaptive control law. The paper concludes discussing the potential applications of such results to improve the design and evaluation of navigation control laws.
description: ICAT-EGVE 2020 - International Conference on Artificial Reality and Telexistence and Eurographics Symposium on Virtual Environments
description: Navigation in Virtual Environments
description: 131
description: 140
description: Hugo Brument, Anne-Hélène Olivier, Maud Marchal, and Ferran Argelaguet
description: CCS Concepts: Human-centered computing --> Virtual reality; User studies
Hippocamelus antisensis
Creators: name: Honacki, James H.
name: Kinman, Kenneth E.
name: Koeppl, James W.
Publisher: name: Zenodo
Year: 1982
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Artiodactyla
Cervidae
Hippocamelus
Hippocamelus antisensis

description: Hippocamelus antisensis (d'Orbigny, 1834). Ann. Mus. Hist. Nat. Paris, 3:91. TYPE LOCALITY: Bolivian Andes, near La Paz. DISTRIBUTION: Andes from Ecuador to N.W. Argentina. PROTECTED STATUS: CITES - Appendix I and U.S. ESA - Endangered. ISIS NUMBER: 5301419006010001001 as H. antisiensis (sic).
description: Published as part of James H. Honacki, Kenneth E. Kinman & James W. Koeppl, 1982, Order Artiodactyla, pp. 315-343 in Mammal Species of the World (1 st Edition), Lawrence, Kansas, USA :Alien Press, Inc. & The Association of Systematics Collections on page 322, DOI: 10.5281/zenodo.7352976
title: Qu'est-ce qu'une délibération collective ?
Creators: name: Urfalino, Philippe
Publisher: name: Politika.io
Year: 2019

description: L’usage courant du terme « délibération » n’appelle pas une précision sur son caractère individuel ou collectif. Le contexte permet de comprendre que l’on a affaire soit à la réflexion d’un individu pour déterminer ce qu’il va faire, soit à un débat ou à une réflexion collective entre les membres d’un groupe ayant une décision à prendre. Bref, pour cet usage courant, la question de savoir ce qu’est une délibération collective ne se pose pas. Il se trouve pourtant que cette interrogation est pertinente en sciences sociales. Toute tentative pour définir plus précisément la notion risque en effet de déboucher sur quelques perplexités. Les traits propres à la délibération collective et ses contours empiriques se révèlent difficiles à cerner et, de fait, font l’objet d’appréciations très différentes.
Low-energy spin excitations of the frustrated ferromagnetic $J_1$-$J_2$ chain material linarite, PbCuSO$_4$(OH)$_2$, in applied magnetic fields $\mathbf{H} \parallel b$ axis
Creators: name: Heinze, L.
name: Le, M. D.
name: Janson, O.
name: Nishimoto, S.
name: Wolter, A. U. B.
name: Süllow, S.
name: Rule, K. C.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report a study of the spin dynamics of the frustrated ferromagnetic $J_1$-$J_2$ chain compound linarite, PbCuSO$_4$(OH)$_2$, in applied magnetic fields up to field polarization. By means of an extreme-environment inelastic neutron scattering experiment, we have measured the low-energy spin excitations of linarite in fields up to 8.8 T for $\mathbf{H} \parallel b$ axis. We have recorded the spin excitation spectra along $h$, $k$ and $l$ for the field-induced magnetic phases IV, V and the field polarized state close to saturation. By employing first-principles calculations, we estimate the leading magnetic exchanges out of the $bc$ plane and model the dispersion relations using linear spin-wave theory. In this way, we find evidence for a (very weak) residual magnetic exchange coupling out of the $bc$ plane. Together with the previously established dominant intrachain couplings $J_1$ and $J_2$ and the interchain coupling $J_3$, we derive an effective set of exchange couplings for a microscopic description of linarite. Further, we find that the peculiar character of phase V manifests itself in the measured spin dynamics.
Percolation with constant freezing
Creators: name: Mottram, Edward
Publisher: name: arXiv
Year: 2013
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60K35

description: We introduce and study a model of percolation with constant freezing (PCF) where edges open at constant rate 1, and clusters freeze at rate αindependently of their size. Our main result is that the infinite volume process can be constructed on any amenable vertex transitive graph. This is in sharp contrast to models of percolation with freezing previously introduced, where the limit is known not to exist. Our interest is in the study of the percolative properties of the final configuration as a function of α. We also obtain more precise results in the case of trees. Surprisingly the algebraic exponent for the cluster size depends on the degree, suggesting that there is no lower critical dimension for the model. Moreover, even for α
description: 30 pages, 8 figures
การสื่อสารภาพลักษณ์ ผู้นำการเมืองท้องถิ่น
Creators: name: มณี ศรีสมุทร
Publisher: name: วารสารสหวิทยาการวิจัย: ฉบับบัณฑิตศึกษา
Year: 2023
Subjects: การสื่อสาร
ภาพลักษณ์
ผู้นำการเมืองท้องถิ่น

description: วารสารสหวิทยาการวิจัย: ฉบับบัณฑิตศึกษา, 12, 1, 208-217
Reducing Motion Sickness Resulting From Movement inside Virtual Reality Environments
Creators: name: Ramshaw, Mike
name: Cutchin, Steve
Publisher: name: The Eurographics Association
Year: 2020
Subjects: Human centered computing
HCI theory concepts and models
HCI design and evaluation methods
User studies

description: Motion sickness while using virtual reality (VR) headsets affects 25-40% of users. Motion sickness results from a disconnect between the user's physical movement and their experienced movement in the virtual environment. The problem of how to move and navigate in a virtual environment that is larger than the user's physical environment is a well-studied problem. This project implements the three most common movement methods (teleportation, on-rails and free movement) and implements modifications to two of those methods (a natural acceleration and deceleration motion to on-rails and acceleration/inertiabased movement to free movement). The goal of this project is to find whether the modifications will decrease motion sickness and increase preferability compared to their conventional counterparts when tested in a user study. Users experienced lower nausea with our novel on-rails movement method combined with acceleration/deceleration than with any other method. This method was also preferred evenly with teleportation, the method most commonly used by developers now. This study indicates that on-rails should be given more attention as a viable solution to the virtual reality movement problem.
description: ICAT-EGVE 2020 - International Conference on Artificial Reality and Telexistence and Eurographics Symposium on Virtual Environments
description: Navigation in Virtual Environments
description: 141
description: 148
description: Mike Ramshaw and Steve Cutchin
description: CCS Concepts: Human-centered computing --> HCI theory, concepts and models; HCI design and evaluation methods; User studies
Anomalous diffusion and response in branched systems: a simple analysis
Creators: name: Forte, Giuseppe
name: Burioni, Raffaella
name: Cecconi, Fabio
name: Vulpiani, Angelo
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We revisit the diffusion properties and the mean drift induced by an external field of a random walk process in a class of branched structures, as the comb lattice and the linear chains of plaquettes. A simple treatment based on scaling arguments is able to predict the correct anomalous regime for different topologies. In addition, we show that even in the presence of anomalous diffusion, Einstein's relation still holds, implying a proportionality between the mean square displacement of the unperturbed systems and the drift induced by an external forcing.
description: revtex.4-1, 16 pages, 7 figures
A variational approach for linearly dependent moving bases in quantum dynamics: application to Gaussian functions
Creators: name: Joubert-Doriol, Loïc
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: In this paper, we present a variational treatment of the linear dependence for a non-orthogonal time-dependent basis set in solving the Schrödinger equation. The method is based on: i) the definition of a linearly independent working space, and ii) a variational construction of the propagator over finite time-steps. The second point allows the method to properly account for changes in the dimensionality of the working space along the time evolution. In particular, the time evolution is represented by a semi-unitary transformation. Tests are done on a quartic double-well potential with Gaussian basis function whose centers evolve according to classical equations of motion. We show that the resulting dynamics converges to the exact one and is unitary by construction.
Simulation of f-Mode Propagation Through a Cluster of Small Identical Magnetic Flux Tubes
Creators: name: Daiffallah, Khalil
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Motivated by the question of how to distinguish seismically between monolithic and cluster models of sunspots, we have simulated the propagation of an $f$-mode wave packet through two identical small magnetic flux tubes (R=200 km), embedded in a stratified atmosphere. We want to study the effect of separation $d$ and incidence angle $χ$ on the scattered wave. We have demonstrated that the horizontal compact pair of tubes ($d/R=2$, $χ=0$) oscillate as a single tube when the incident wave is propagating, which gives a scattered wave amplitude of about twice that from a single tube. The scattered amplitude decreases with increasing $d$ when $d$ is about $λ/2π$ where $λ$ is the wavelength of the incident wave packet. In this case the individual tubes start to oscillate separately in the manner of near-field scattering. When $d$ is about twice of $λ/2π$, scattering from individual tubes reaches the far-field regime, giving rise to coherent scattering with an amplitude similar to the case of the compact pair of tubes. For perpendicular incidence ($χ=π/2$), the tubes oscillate simultaneously with the incident wave packet. Moreover, simulations show that a compact cluster oscillates almost as a single individual small tube and acts more like a scattering object, while a loose cluster shows multiple-scattering in the near-field and the absorption is largest when $d$ within the cluster is about $λ/2π$. This is the first step to understand the seismic response of a bundle of magnetic flux tubes in the context of sunspot and plage helioseismology.
description: 16 pages, 11 figures, accepted for publication in Solar Physics
Nanoscale Electric Field Imaging with an Ambient Scanning Quantum Sensor Microscope
Creators: name: Qiu, Ziwei
name: Hamo, Assaf
name: Vool, Uri
name: Zhou, Tony X.
name: Yacoby, Amir
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Applied Physics (physics.app-ph)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: Nitrogen-vacancy (NV) center in diamond is a promising quantum sensor with remarkably versatile sensing capabilities. While scanning NV magnetometry is well-established, NV electrometry has been so far limited to bulk diamonds. Here we demonstrate imaging external alternating (AC) and direct (DC) electric fields with a single NV at the apex of a diamond scanning tip under ambient conditions. A strong electric field screening effect is observed at low frequencies due to charge noise on the surface. We quantitatively measure its frequency dependence, and overcome this screening by mechanically oscillating the tip for imaging DC fields. Our scanning NV electrometry achieved an AC E-field sensitivity of 26 mV um^(-1) Hz^(-1/2), a DC E-field gradient sensitivity of 2 V um^(-2) Hz^(-1/2), and sub-100 nm resolution limited by the NV-sample distance. Our work represents an important step toward building a scanning-probe-based multimodal quantum sensing platform.
description: main text: 10 pages, 4 figures. supplementary information: 10 pages, 13 figures
In silico modeling for personalized stenting in aortic coarctation
Creators: name: Ma, Dandan
name: Wang, Yong
name: Azhar, Mueed
name: Adler, Ansgar
name: Steinmetz, Michael
name: Uecker, Martin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Medical Physics (physics.med-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Stent intervention is a recommended therapy to reduce the pressure gradient and restore blood flow for patients with coarctation of the aorta (CoA). In this work, we developed a framework for personalized stent intervention in CoA using in silico modeling, combining computational fluid dynamics (CFD) and image-based prediction of the geometry of the aorta after stent intervention. Firstly, the blood flow in the aorta, whose geometry was reconstructed from magnetic resonance imaging (MRI) data, was numerically modeled using the lattice Boltzmann method (LBM). Both large eddy simulation (LES) and direct numerical simulation (DNS) were considered to adequately resolve the turbulent hemodynamics, with boundary conditions extracted from phase-contrast flow MRI. By comparing the results from CFD and 4D-Flow MRI in 3D-printed flow phantoms, we concluded that the LBM based LES is capable of obtaining accurate aortic flow with acceptable computational cost. In silico stent implantation for a patient with CoA was then performed by predicting the deformed geometry after stent intervention and predicting the blood flow. By evaluating the pressure drop and maximum wall shear stress, an optimal stent can be selected.
description: Ethics declaration added
Holographic entanglement entropy in insulator/superconductor transition with Born-Infeld electrodynamics
Creators: name: Yao, Weiping
name: Jing, Jiliang
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate the holographic entanglement entropy in the insulator/superconductor phase transition for the Born-Infeld electrodynamics with full backreaction in five-dimensional AdS soliton spacetime. We note that the holographic entanglement entropy is a good probe to study the properties of the phase transition, and the Born-Infeld factor $b$ has no effect on the critical chemical potential $μ_c$. We find that both in the half space and the belt one, the non-monotonic behavior of the entanglement entropy versus the chemical potential is a general property, and the entanglement entropy increases with the increase of the Born-Infeld factor in the superconductor phase. Particularly, there exists confinement/deconfinement phase transition in the strip geometry and the critical width $\ell_c$ is dependent of the Born-Infeld parameter.
description: 17 pages, 6 figures, accepted for publication in JHEP. arXiv admin note: text overlap with arXiv:1203.6620 by other authors
Hippocamelus bisulcus
Creators: name: Honacki, James H.
name: Kinman, Kenneth E.
name: Koeppl, James W.
Publisher: name: Zenodo
Year: 1982
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Artiodactyla
Cervidae
Hippocamelus
Hippocamelus bisulcus

description: Hippocamelus bisulcus (Molina, 1882). Sagg. Stor. Nat. Chile, p. 320. TYPE LOCALITY: Chilean Andes, Colchagua Prov. DISTRIBUTION: Andes of S. Chile and S. Argentina. PROTECTED STATUS: CITES - Appendix I and U.S. ESA - Endangered. ISIS NUMBER: 5301419006010002001.
description: Published as part of James H. Honacki, Kenneth E. Kinman & James W. Koeppl, 1982, Order Artiodactyla, pp. 315-343 in Mammal Species of the World (1 st Edition), Lawrence, Kansas, USA :Alien Press, Inc. & The Association of Systematics Collections on page 322, DOI: 10.5281/zenodo.7352976
A Case Study in Meta-AUTOMATION: AUTOMATIC Generation of Congruence AUTOMATA For Combinatorial Sequences
Creators: name: Rowland, Eric
name: Zeilberger, Doron
Publisher: name: arXiv
Year: 2013
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: This article is a sequel to a recent article by Eric Rowland and Reem Yassawi, presenting yet another approach to the fast determination of congruence properties of `famous' combinatorial sequences. The present approach can be taught to a computer, and our beloved servant, Shalosh B. Ekhad, was able to generate many new theorems, for famous sequences, of course, but also for many obscure ones!
description: 17 pages, accompanied by Maple packages
Non-hermitian off-diagonal magnetic response of Dirac fermions
Creators: name: Kiss, Roberta Zsófia
name: Sticlet, Doru
name: Moca, Catalin Pascu
name: Dóra, Balázs
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We perform a comparative study for the magnetization dynamics within linear response theory of one and two dimensional massive Dirac electrons, after switching on either a real (hermitian) or an imaginary (non-hermitian) magnetic field. While hermitian dc magnetic fields polarize the spins in the direction of the external magnetic field, non-hermitian magnetic fields induce only off diagonal response. An imaginary dc magnetic field perpendicular to the mass term induces finite magnetization in the third direction only according to the right hand rule. This can be understood by analyzing the non-hermitian equation of motion of the spin, which becomes analogous to a classical particle in crossed electric and magnetic fields. Therein, the spin expectation value, the mass term and imaginary magnetic field play the role of the classical momentum, magnetic and electric field, respectively. The latter two create a drift velocity perpendicular to them, which gives rise to the off-diagonal component of the dc spin susceptibility, similarly to how the Hall effect develops in the classical description.
description: 8 pages, 2 figures
A dual approach to ambiguity aversion
Creators: name: Bommier, Antoine
Publisher: name: ETH Zurich
Year: 2014
Subjects: subject: Ambiguity aversion
subject: First-order stochastic dominance
subject: Separability
subject: Comonotonic sure-thing principle
subject: Rank-dependent utility
subject: Saving behavior
subject: info:eu-repo/classification/ddc/510
subject: Mathematics
subject: FOS: Mathematics

description: Economics Working Paper Series, 14/207
Comparison of the gradient flow with cooling in $SU(3)$ pure gauge theory
Creators: name: Bonati, Claudio
name: D'Elia, Massimo
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The gradient (Wilson) flow has been introduced recently in order to provide a solid theoretical framework for the smoothing of ultraviolet noise in lattice gauge configurations. It is interesting to ask how it compares with other, more heuristic and numerically cheaper smoothing techniques, such as standard cooling. In this study we perform such a comparison, focusing on observables related to topology. We show that, already for moderately small lattice spacings, standard cooling and the gradient flow lead to equivalent results, both for average quantities and configuration by configuration.
description: Revised version, new data and a discussion of the continuum limit added. 11 pages, 11 eps figures
Hydropotes Swinhoe 1870
Creators: name: Honacki, James H.
name: Kinman, Kenneth E.
name: Koeppl, James W.
Publisher: name: Zenodo
Year: 1982
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Artiodactyla
Cervidae
Hydropotes

description: Hydropotes Swinhoe, 1870. Proc. Zool. Soc. Lond., 1870:90. ISIS NUMBER: 5301419006011000000.
description: Published as part of James H. Honacki, Kenneth E. Kinman & James W. Koeppl, 1982, Order Artiodactyla, pp. 315-343 in Mammal Species of the World (1 st Edition), Lawrence, Kansas, USA :Alien Press, Inc. & The Association of Systematics Collections on page 322, DOI: 10.5281/zenodo.7352976
On the microstructure of higher-dimensional Reissner-Nordström black holes in quantum regime
Creators: name: Bukhari, Syed Masood A. S.
name: Pourhassan, Behnam
name: Aounallah, Houcine
name: Wang, Li-Gang
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Thermodynamic Riemannian geometry provides great insights into the microscopic structure of black holes (BHs). One such example is the Ruppeiner geometry which is the metric space comprising the second derivatives of entropy with respect to other extensive variables of the system. Reissner-Nordström black holes (RNBHs) are known to be endowed with a flat Ruppeiner geometry for all higher spacetime dimensions. However this holds true if one invokes classical gravity where the semi-classical Bekenstein-Hawking entropy best describes the thermodynamics of the system. If the much deeper quantum gravity and string theories entail modifications to BH entropy, this prompts the question whether the Ruppeiner flatness associated with higher dimensional RNBHs still persists. We investigate this problem by considering non-perturbative (exponential) and perturbative (logarithmic) modifications to BH entropy of a 5D RNBH. We find that while the case is so for larger (classical) geometries, the situation is radically altered for smaller (quantum) geometries. Namely, we show surprising emergence of multiple phase transitions that depend on the choice of extent of corrections to BH entropy and charge. Our consideration involves differentiated extremal and non-extremal geometric scales corresponding to the validity regime of corrections to entropy.
 More emphasis is laid on the exponential case as the contributions become highly non-trivial on small scales. An essential critical mass scale arises in this case that marks the onset of these phase transitions while the BH diminishes in size via Hawking evaporation. We contend that this critical value of mass perhaps best translates as the epoch of a classical to quantum BH phase transition.
description: 22 pages, 14 figures
Visualizing the interplay of Dirac mass gap and magnetism at nanoscale in intrinsic magnetic topological insulators
Creators: name: Liu, Mengke
name: Lei, Chao
name: Kim, Hyunsue
name: Li, Yanxing
name: Frammolino, Lisa
name: Yan, Jiaqiang
name: Macdonald, Allan H.
name: Shih, Chih-Kang
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In intrinsic magnetic topological insulators, Dirac surface state gaps are prerequisites for quantum anomalous Hall and axion insulating states. Unambiguous experimental identification of these gaps has proved to be a challenge, however. Here we use molecular beam epitaxy to grow intrinsic MnBi2Te4 thin films. Using scanning tunneling microscopy/spectroscopy, we directly visualize the Dirac mass gap and its disappearance below and above the magnetic order temperature. We further reveal the interplay of Dirac mass gaps and local magnetic defects. We find that in high defect regions, the Dirac mass gap collapses. Ab initio and coupled Dirac cone model calculations provide insight into the microscopic origin of the correlation between defect density and spatial gap variations. This work provides unambiguous identification of the Dirac mass gap in MnBi2Te4, and by revealing the microscopic origin of its gap variation, establishes a material design principle for realizing exotic states in intrinsic magnetic topological insulators.
description: Main and SI
Grain Imports Risk Hedging in Morocco
Creators: name: Jouamaa, Mohammed Adil
name: El Mekki, Abdelkader Ait
name: Boubrahimi, Nabil
name: Harbouze, Rachid
name: Jouamaa, Mohammed Adil
name: El Mekki, Abdelkader Ait
name: Boubrahimi, Nabil
name: Harbouze, Rachid
Publisher: name: Unknown
Year: 2020
Subjects: subject: Agricultural and Food Policy
subject: Agricultural Finance
subject: Financial Economics
subject: International Relations/Trade
subject: Risk and Uncertainty
subject: Grain imports
subject: futures markets
subject: hedging
subject: risk management
subject: Morocco.

description: Hedging price risk has become an increasingly popular activity around the world. This paper is devoted to analyze the main determinants that help Moroccan cereal importers use hedging instruments. Based on an application of Heckman model (1979), our empirical approach aims at determining the behavior of import companies face to price risk. The results show that firm size is a key determining factor in hedging decisions. More precisely, our findings suggest that the turnover of the company is positively related to the purchase of hedging contracts. The same relation is noted between risk aversion, risk premium, risk perception and adopted import pattern (self or grouped), on one hand, and using futures contracts, on the other hand. Surprisingly, variables such as total import volume, risk management structure or selling patterns are either not highly significant or not significant at all. These results based for the first time in Morocco, at our knowledge, open the door to further investigations that aim at better understand the underpinnings of Moroccan cereal importers behavior face to price risk at the world market.
Hydropotes inermis Swinhoe 1870
Creators: name: Honacki, James H.
name: Kinman, Kenneth E.
name: Koeppl, James W.
Publisher: name: Zenodo
Year: 1982
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Artiodactyla
Cervidae
Hydropotes
Hydropotes inermis

description: Hydropotes inermis Swinhoe, 1870. Proc. Zool. Soc. Lond., 1870:89. TYPE LOCALITY: China, Kiangsu, Chingkiang, Yangtze River, Deer Isl. DISTRIBUTION: Lower Yangtze Basin, west to Hupei (China); Korea; introduced in England and France. ISIS NUMBER: 5301419006011001001.
description: Published as part of James H. Honacki, Kenneth E. Kinman & James W. Koeppl, 1982, Order Artiodactyla, pp. 315-343 in Mammal Species of the World (1 st Edition), Lawrence, Kansas, USA :Alien Press, Inc. & The Association of Systematics Collections on page 322, DOI: 10.5281/zenodo.7352976
Secret sharing on the $d$-dimensional cube
Creators: name: Csirmaz, Laszlo
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cryptography and Security (cs.CR)
subject: Combinatorics (math.CO)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: 94A60, 94A17, 52B40, 68R10

description: We prove that for $d>1$ the best information ratio of the perfect secret sharing scheme based on the edge set of the $d$-dimensional cube is exactly $d/2$. Using the technique developed, we also prove that the information ratio of the infinite $d$-dimensional lattice is $d$.