cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Inverse problem for the retarded field of an arbitrary moving charge
Creators: name: Epp, V. Ya.
name: Mitrofanova, T. G.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: It is assumed that the Lienard-Wiechert fields of an arbitrary moving charge is measured or predefined as a function of time. The position of the charge is calculated as a function of the retarded time.
description: LaTeX2e, 6 pages, published in Physics Letters A
FARM OUTPUT, NON-FARM INCOME, AND COMMERCIALIZATION IN RURAL GEORGIA
Creators: name: Kan, Iddo
name: Kimhi, Ayal
name: Lerman, Zvi
name: Kan, Iddo
name: Kimhi, Ayal
name: Lerman, Zvi
Publisher: name: Unknown
Year: 2006
Subjects: subject: Farm Management
subject: commercialization
subject: market participation
subject: farm output
subject: non-farm income
subject: resource allocation

description: This article examines the decision of farmers to sell part of their farm output on the market, using data from the Republic of Georgia. A two-level empirical model is used, in which endowments and resource allocation decisions determine farm output and non-farm income, and these in turn determine market participation. We found, as expected, that farm output affects market participation positively, while non-farm income affects it negatively. Landholdings have an indirect positive effect on market participation, through its positive effect on farm output. Education has a negative effect on market participation, mainly through its positive effect on non-farm income.
Reionization Parameter Inference from 3D Minkowski Functionals of the 21 cm Signals
Creators: name: Diao, Kangning
name: Chen, Zhaoting
name: Chen, Xuelei
name: Mao, Yi
Publisher: name: arXiv
Year: 2024
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The Minkowski Functionals (MFs), a set of topological summary statistics, have emerged as a powerful tool for extracting non-Gaussian information. We investigate the prospect of constraining the reionization parameters using the MFs of the 21 cm brightness temperature field from the epoch of reionization (EoR). Realistic effects, including thermal noise, synthesized beam, and foreground avoidance, are applied to the mock observations from the radio interferometric array experiments such as the Hydrogen Epoch of Reionization Array (HERA) and the Square Kilometre Array (SKA). We demonstrate that the MFs of the 21 cm signal measured with SKA-Low can be used to distinguish different reionization models, whereas the MF measurement with a HERA-like array cannot be made accurately enough. We further forecast the accuracies with which the MF measurements can place constraints on reionization parameters, using the standard MCMC analysis for parameter inference based on forward modeling. We find that for SKA-Low observation, MFs provide unbiased estimations of the reionization parameters with accuracies comparable to the power spectrum (PS) analysis. Furthermore, joint constraints using both MFs and PS can improve the constraint accuracies by up to $30\%$ compared to those with the PS alone. Nevertheless, the constraint accuracies can be degraded if the EoR window is shrunk with strong foreground avoidance. Our analysis demonstrates the promise of MFs as a set of summary statistics that extract complementary information from the 21 cm EoR field to the two-point statistics, which suggests a strong motivation for incorporating the MFs into the data analysis of future 21 cm observations.
description: 20 pages, 10 figures, match the version that accpeted by ApJ,
The Emergence of Electroweak Skyrmions through Higgs Bosons
Creators: name: Criado, Juan Carlos
name: Khoze, Valentin V.
name: Spannowsky, Michael
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Skyrmions are extended field configurations, initially proposed to describe baryons as topological solitons in an effective field theory of mesons. We investigate and confirm the existence of skyrmions within the electroweak sector of the Standard Model and study their properties. We find that the interplay of the electroweak sector with a dynamical Higgs field and the Skyrme term leads to a non-trivial vacuum structure with the skyrmion and perturbative vacuum sectors separated by a finite energy barrier. We identify dimension-8 operators that stabilise the electroweak skyrmion as a spatially localised soliton field configuration with finite size. Such operators are induced generically by a wide class of UV models. To calculate the skyrmion energy and radius we use a neural network method. Electroweak skyrmions are non-topological solitons but are exponentially long lived, and we find that the electroweak skyrmion is a viable dark matter candidate. While the skyrmion production cross section at collider experiments is suppressed, measuring the size of the Skyrme term in multi-Higgs-production processes at high-energy colliders is a promising avenue to probe the existence of electroweak skyrmions.
description: 23 pages, 6 figures
Quantum oscillation study of the large magnetoresistance in Mo substituted WTe$_2$ single crystals
Creators: name: Barua, Sourabh
name: Lees, M. R.
name: Balakrishnan, G.
name: Goddard, P. A.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The list of interesting electrical properties exhibited by transition metal dichalcogenides has grown with the discovery of extremely large magnetoresistance (MR) and type-II Weyl semimetal behaviour in WTe$_2$ and MoTe$_2$. The extremely large MR in WTe$_2$ is still not adequately understood. Here, we systematically study the effect of Mo substitution on the quantum oscillations in the MR in WTe$_2$. The MR decreases with Mo substitution, however, the carrier concentrations extracted from the quantum oscillations show that the charge compensation improves. We believe that earlier interpretations based on the two-band theory, which attribute the decrease in MR to charge imbalance, could be incorrect due to over-parametrization. We attribute the decrease in MR in the presence of charge compensation to a fall in transport mobility, which is evident from the residual resistivity ratio data. The quantum scattering time and the effective masses do not change within experimental errors upon substitution.
description: This revised version includes minor revisions after peer-review
Deep Learning Approach for Enhanced Transferability and Learning Capacity in Tool Wear Estimation
Creators: name: Li, Zongshuo
name: Meurer, Markus
name: Bergs, Thomas
Publisher: name: arXiv
Year: 2024
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: As an integral part of contemporary manufacturing, monitoring systems obtain valuable information during machining to oversee the condition of both the process and the machine. Recently, diverse algorithms have been employed to detect tool wear using single or multiple sources of measurements. In this study, a deep learning approach is proposed for estimating tool wear, considering cutting parameters. The model's accuracy and transferability in tool wear estimation were assessed with milling experiments conducted under varying cutting parameters. The results indicate that the proposed method outperforms conventional methods in terms of both transferability and rapid learning capabilities.
IRRIGATION PRODUCTION FUNCTIONS WITH WATER-CAPITAL SUBSTITUTION
Creators: name: Shani, Uri
name: Tsur, Yacov
name: Zemel, Amos
name: Zilberman, David
name: Shani, Uri
name: Tsur, Yacov
name: Zemel, Amos
name: Zilberman, David
Publisher: name: Unknown
Year: 2007
Subjects: Resource /Energy Economics and Policy

description: The dynamics of biomass growth implies that the yield of irrigated crops depends, in addition to the total amount of water applied, on irrigation scheduling during the growing period. Advanced irrigation technologies relax constraints on irrigation rates and timing, allowing to better adjust irrigation scheduling to the varying needs of the plants along the growing period. Irrigation production functions, then, should include capital (or expenditures on irrigation equipment) in addition to aggregate water. We derive such functions and study their water-capital substitution properties. Implications for water demand and adoption of irrigation technologies are investigated. An empirical application confirms these properties.
CLIMATE POLICY WHEN THE DISTANT FUTURE MATTERS: CATASTROPHIC EVENTS WITH HYPERBOLIC DISCOUNTING
Creators: name: Karp, Larry S.
name: Tsur, Yacov
name: Karp, Larry S.
name: Tsur, Yacov
Publisher: name: Unknown
Year: 2007
Subjects: subject: Environmental Economics and Policy
subject: abrupt climate change
subject: event uncertainty
subject: catastrophic risk
subject: hyperbolic discounting
subject: Markov Perfect Equilibria

description: Low probability catastrophic climate change can have a signifcant influence on policy under hyperbolic discounting. We compare the set of Markov Perfect Equilibria (MPE) to the optimal policy under time-consistent commitment. For some initial levels of risk there are multiple MPE; these may involve either excessive or insufficient stabilization effort. These results imply that even if the free-rider problem amongst contemporaneous decision-makers were solved, there may remain a coordination problem amongst successive generations of decision-makers. A numerical example shows that under plausible conditions society should respond vigorously to the threat of climate change.
A-twisted heterotic Landau-Ginzburg models
Creators: name: Guffin, Josh
name: Sharpe, Eric
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper, we apply the methods developed in recent work for constructing A-twisted (2,2) Landau-Ginzburg models to analogous (0,2) models. In particular, we study (0,2) Landau-Ginzburg models on topologically non-trivial spaces away from large-radius limits, where one expects to find correlation function contributions akin to (2,2) curve corrections. Such heterotic theories admit A- and B-model twists, and exhibit a duality that simultaneously exchanges the twists and dualizes the gauge bundle. We explore how this duality operates in heterotic Landau-Ginzburg models, as well as other properties of these theories, using examples which RG flow to heterotic nonlinear sigma models as checks on our methods.
description: 31 pages, LaTeX
Asynchronous pseudo-systems
Creators: name: Vlad, Serban E.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Other Computer Science (cs.OH)
subject: FOS: Computer and information sciences

description: The paper introduces the concept of asynchronous pseudo-system. Its purpose is to correct/generalize/continue the study of the asynchronous systems (the models of the asynchronous circuits) that has been started in [1], [2].
description: 28 pages
title: Марриет и Брет Гарт
Creators: name: Иванова, Любовь
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2021

description: Данная статья посвящена исследованию познавательного и критического потенциала пародии Ф. Брета Гарта «Мичман Бризи» на творчество популярного английского писателя-мариниста XIX века Фредерика Марриета (1792—1848) в контексте становления и развития жанра морского романа. Художественными средствами литературной пародии Брет Гарт создает комический образ самобытного явления английской литературы, открывшего широкому кругу читающей публики захватывающий мир морских приключений, получившего развитие во всем многообразии форм в творчестве В.Скотта, Дж.Ф.Купера, Г.Мелвилла, У.Голдинга. Изучение художественного своеобразия пародии как единства основополагающих начал — воспроизведения и трансформации пародируемого объекта с целью создания его комического образа, основанное на использовании культурно-исторического, сравнительно-исторического методов, методов интертекстуального анализа и рецептивной эстетики, а также биографического комментария, позволяет сопоставить пародийную оценку творческого наследия Ф.Марриета с мнением современников, коллег по писательскому цеху, выводами современных исследователей о значении творческого наследия писателя.
Controlling quantum transport through a single molecule
Creators: name: Cardamone, D. M.
name: Stafford, C. A.
name: Mazumdar, S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate multi-terminal quantum transport through single monocyclic aromatic annulene molecules, and their derivatives, using the nonequilibrium Green function approach in the self-consistent Hartree-Fock approximation. A new device concept, the Quantum Interference Effect Transistor (QuIET) is proposed, exploiting perfect destructive interference stemming from molecular symmetry, and controlling current flow by introducing decoherence and/or elastic scattering that break the symmetry. This approach overcomes the fundamental problems of power dissipation and environmental sensitivity that beset many nanoscale device proposals.
description: 4 pages, 5 figures
Density relaxation in conserved Manna sandpiles
Creators: name: Tapader, Dhiraj
name: Pradhan, Punyabrata
name: Dhar, Deepak
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study relaxation of long-wavelength density perturbations in one dimensional conserved Manna sandpile. Far from criticality where correlation length $ξ$ is finite, relaxation of density profiles having wave numbers $k \rightarrow 0$ is diffusive, with relaxation time $τ_R \sim k^{-2}/D$ with $D$ being the density-dependent bulk-diffusion coefficient. Near criticality with $k ξ\gsim 1$, the bulk diffusivity diverges and the transport becomes anomalous; accordingly, the relaxation time varies as $τ_R \sim k^{-z}$, with the dynamical exponent $z=2-(1-β)/ν_{\perp} < 2$, where $β$ is the critical order-parameter exponent and and $ν_{\perp}$ is the critical correlation-length exponent. Relaxation of initially localized density profiles on infinite critical background exhibits a self-similar structure. In this case, the asymptotic scaling form of the time-dependent density profile is analytically calculated: we find that, at long times $t$, the width $σ$ of the density perturbation grows anomalously, i.e., $σ\sim t^{w}$, with the growth exponent $ω=1/(1+β) > 1/2$. In all cases, theoretical predictions are in reasonably good agreement with simulations.
description: 15 pages, 10 figures
A ground-truth dataset and classification model for detecting bots in GitHub issue and PR comments
Creators: name: Golzadeh, Mehdi
name: Decan, Alexandre
name: Legay, Damien
name: Mens, Tom
Publisher: name: arXiv
Year: 2020
Subjects: subject: Software Engineering (cs.SE)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Bots are frequently used in Github repositories to automate repetitive activities that are part of the distributed software development process. They communicate with human actors through comments. While detecting their presence is important for many reasons, no large and representative ground-truth dataset is available, nor are classification models to detect and validate bots on the basis of such a dataset. This paper proposes a ground-truth dataset, based on a manual analysis with high interrater agreement, of pull request and issue comments in 5,000 distinct Github accounts of which 527 have been identified as bots. Using this dataset we propose an automated classification model to detect bots, taking as main features the number of empty and non-empty comments of each account, the number of comment patterns, and the inequality between comments within comment patterns. We obtained a very high weighted average precision, recall and F1-score of 0.98 on a test set containing 40% of the data. We integrated the classification model into an open source command-line tool to allow practitioners to detect which accounts in a given Github repository actually correspond to bots.
description: 16 pages, 11 figures
Scope-enhanced Compositional Semantic Parsing for DRT
Creators: name: Yang, Xiulin
name: Groschwitz, Jonas
name: Koller, Alexander
name: Bos, Johan
Publisher: name: arXiv
Year: 2024
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: Discourse Representation Theory (DRT) distinguishes itself from other semantic representation frameworks by its ability to model complex semantic and discourse phenomena through structural nesting and variable binding. While seq2seq models hold the state of the art on DRT parsing, their accuracy degrades with the complexity of the sentence, and they sometimes struggle to produce well-formed DRT representations. We introduce the AMS parser, a compositional, neurosymbolic semantic parser for DRT. It rests on a novel mechanism for predicting quantifier scope. We show that the AMS parser reliably produces well-formed outputs and performs well on DRT parsing, especially on complex sentences.
Standard Model with the additional $Z_6$ symmetry on the lattice
Creators: name: Bakker, B. L. G.
name: Veselov, A. I.
name: Zubkov, M. A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: An additional $Z_6$ symmetry hidden in the fermion and Higgs sectors of the Standard Model has been found recently\cite{BVZ2003}. A lattice regularization of the Standard Model was constructed that possesses this symmetry. In \cite{BVZ2004} we have reported our results on the numerical simulation of the Electroweak sector of the model. In this paper we report our results on the numerical simulation of the full ($SU(3)\otimes SU(2) \otimes U(1)$) model. The phase diagram of the model has been investigated using static quark and lepton potentials. Various types of monopoles have been constructed. Their densities appear to be sensitive to the phase transition lines. Differences between the realizations of the Standard Model which do or do not possess the mentioned $Z_6$ symmetry, are discussed.
description: Latex, 14 pages
Rapidly-rotating quantum droplets confined in a harmonic potential
Creators: name: Nikolaou, S.
name: Kavoulakis, G. M.
name: Ogren, M.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider a "symmetric" quantum droplet in two spatial dimensions, which rotates in a harmonic potential, focusing mostly on the limit of "rapid" rotation. We examine this problem using a purely numerical approach, as well as a semi-analytic Wigner-Seitz approximation (first developed by Baym, Pethick et al.) for the description of the state with a vortex lattice. Within this approximation we assume that each vortex occupies a cylindrical cell, with the vortex-core size treated as a variational parameter. Working with a fixed angular momentum, as the angular momentum increases and depending on the atom number, the droplet accommodates none, few, or many vortices, before it turns to center-of-mass excitation. For the case of a "large" droplet, working with a fixed rotational frequency of the trap $Ω$, as $Ω$ approaches the trap frequency $ω$, a vortex lattice forms, the number of vortices increases, the mean spacing between them decreases, while the "size" of each vortex increases as compared to the size of each cell. In contrast to the well-known problem of contact interactions, where we have melting of the vortex lattice and highly-correlated many-body states, here no melting of the vortex lattice is present, even when $Ω= ω$. This difference is due to the fact that the droplet is self-bound. Actually, for $Ω= ω$, the "smoothed" density distribution becomes a flat top, very much like the static droplet. When $Ω$ exceeds $ω$, the droplet maintains its shape and escapes to infinity, via center-of-mass motion.
description: 11 pages, 11 figures
Crosslingual Topic Modeling with WikiPDA
Creators: name: Piccardi, Tiziano
name: West, Robert
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computation and Language (cs.CL)
subject: Digital Libraries (cs.DL)
subject: FOS: Computer and information sciences

description: We present Wikipedia-based Polyglot Dirichlet Allocation (WikiPDA), a crosslingual topic model that learns to represent Wikipedia articles written in any language as distributions over a common set of language-independent topics. It leverages the fact that Wikipedia articles link to each other and are mapped to concepts in the Wikidata knowledge base, such that, when represented as bags of links, articles are inherently language-independent. WikiPDA works in two steps, by first densifying bags of links using matrix completion and then training a standard monolingual topic model. A human evaluation shows that WikiPDA produces more coherent topics than monolingual text-based LDA, thus offering crosslinguality at no cost. We demonstrate WikiPDA's utility in two applications: a study of topical biases in 28 Wikipedia editions, and crosslingual supervised classification. Finally, we highlight WikiPDA's capacity for zero-shot language transfer, where a model is reused for new languages without any fine-tuning. Researchers can benefit from WikiPDA as a practical tool for studying Wikipedia's content across its 299 language editions in interpretable ways, via an easy-to-use library publicly available at https://github.com/epfl-dlab/WikiPDA.
description: 10 pages, WWW - The Web Conference, 2021
An AI-Based System Utilizing IoT-Enabled Ambient Sensors and LLMs for Complex Activity Tracking
Creators: name: Sun, Yuan
name: Ortiz, Jorge
Publisher: name: arXiv
Year: 2024
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Complex activity recognition plays an important role in elderly care assistance. However, the reasoning ability of edge devices is constrained by the classic machine learning model capacity. In this paper, we present a non-invasive ambient sensing system that can detect multiple activities and apply large language models (LLMs) to reason the activity sequences. This method effectively combines edge devices and LLMs to help elderly people in their daily activities, such as reminding them to take pills or handling emergencies like falls. The LLM-based edge device can also serve as an interface to interact with elderly people, especially with memory issue, assisting them in their daily lives. By deploying such a system, we believe that the smart sensing system can improve the quality of life for older people and provide more efficient protection
GOMES, Cristina Costa; PINA, Isabel Murta; FERNANDES OP, José Manuel; COUTINHO, Maria João Pereira, coord. – Rastos dominicanos de Portugal para o mundo: 600 anos da Província Portuguesa. Homenagem a Fr. José Augusto Mourão, O.P.
Creators: name: Fernandes, Maria De Lurdes Correia
Publisher: name: Lusitania Sacra
Year: 2023

description: Lusitania Sacra, n. 48 (2023): Relações entre o Papado e a Península Ibérica (séculos XI-XIII)
Footprints of impurity quantum phase transitions in quantum Monte Carlo statistics
Creators: name: Pokorný, Vladislav
name: Novotný, Tomáš
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Interacting single-level quantum dot connected to BCS superconducting leads represents a well-controllable system to study the interplay between the correlation effects and the electron pairing that can result in a $0-π$ (singlet-doublet) quantum phase transition. The physics of this system can be well described by the impurity Anderson model. We present an analysis of the statistics of the perturbation expansion order of the continuous-time hybridization expansion quantum Monte Carlo algorithm in the vicinity of such a first-order impurity quantum phase transition. By calculating the moments of the histograms of the expansion order which deviate from the ideal Gaussian shape, we provide an insight into the thermodynamic mixing of the two phases at low but finite temperatures which is reflected in the bimodal nature of the histograms.
description: 13 pages, 8 figures
Tuning the magnetic ground state of a novel tetranuclear Nickel(II) molecular complex by high magnetic fields
Creators: name: Golze, C.
name: Alfonsov, A.
name: Klingeler, R.
name: Buchner, B.
name: Kataev, V.
name: Mennerich, C.
name: Klauss, H. -H.
name: Goiran, M.
name: Broto, J. -M.
name: Rakoto, H.
name: Demeshko, S.
name: Leibeling, G.
name: Meyer, F.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Electron spin resonance and magnetization data in magnetic fields up to 55 T of a novel multicenter paramagnetic molecular complex [L_2Ni_4(N_3)(O_2C Ada)_4](Cl O_4) are reported. In this compound, four Ni centers each having a spin S = 1 are coupled in a single molecule via bridging ligands (including a μ_4-azide) which provide paths for magnetic exchange. Analysis of the frequency and temperature dependence of the ESR signals yields the relevant parameters of the spin Hamiltonian, in particular the single ion anisotropy gap and the g factor, which enables the calculation of the complex energy spectrum of the spin states in a magnetic field. The experimental results give compelling evidence for tuning the ground state of the molecule by magnetic field from a nonmagnetic state at small fields to a magnetic one in strong fields owing to the spin level crossing at a field of ~25 T.
description: revised version, accepted for publication in Physical Review B
Successful cooperative arrangements for environmental stewardship : a study of BC parks and environmental nongovernment organisations
Creators: name: Tamm, Sabine Susan
Publisher: name: University of British Columbia
Year: 2009

description: These are challenging times for parks and protected areas in British Columbia as these areas have increased in size and use, while resources for managing them have shrunk considerably. Environmental nongovernment organisations (ENGOs) have recognized these threats and as a result are becoming increasingly involved in the stewardship of parks and protected areas. As the provincial government authority responsible for their management, BC Parks acknowledges that the needs and aspirations of people living in and around these areas must somehow be integrated in their management in order to ensure their long-term viability, and that ENGOs have valuable knowledge and skills to offer in this regard. As a result, cooperative arrangements, or partnerships, are being increasingly explored as a mutually beneficial means of forwarding BC Parks' mandate of conservation and recreation, and the mandate of similarly-minded ENGOs. The central purpose of this thesis is to identify essential criteria that must be met for cooperative arrangements between ENGOs and BC Parks to be successful. The study focusses on four current, successful partnerships. Research methods included a literature review and interviews with representatives from each of the participating BC Parks districts and ENGOs. The thesis presents a number of key findings that have significant import to the successful planning, implementation and management of cooperative arrangements for parks and protected areas. In addition to the criteria identified as central to their success, certain process-based actions have relevance to fulfilling the criteria. The level of trust between partners also has an impact on relations, which is enhanced when the criteria are met and over the course of time. The expectations of parties with regard to the extent of power-sharing and how this is exhibited in the cooperative arrangement also affects the perceived level of success of partners and therefore their commitment to the partnership.
Heavy double neutron stars: birth, mid-life and death
Creators: name: Galaudage, Shanika
name: Adamcewicz, Christian
name: Zhu, Xing-Jiang
name: Stevenson, Simon
name: Thrane, Eric
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Radio pulsar observations probe the lives of Galactic double neutron-star (DNS) systems while gravitational waves enable us to study extragalactic DNS in their final moments. By combining measurements from radio and gravitational-wave astronomy, we seek to gain a more complete understanding of DNS from formation to merger. We analyse the recent gravitational-wave binary neutron star mergers GW170817 and GW190425 in the context of other DNS known from radio astronomy. By employing a model for the birth and evolution of DNS, we measure the mass distribution of DNS at birth, at mid-life (in the radio), and at death (in gravitational waves). We consider the hypothesis that the high-mass gravitational-wave event GW190425 is part of a subpopulation formed through unstable case BB mass transfer, which quickly merge in $\sim 10-100~\mathrm{Myr}$. We find mild evidence to support this hypothesis and that GW190425 is not a clear outlier from the radio population as previously claimed. If there are fast-merging binaries, we estimate that they constitute $8-79\%$ of DNS at birth (90% credibility). We estimate the typical delay time between the birth and death of fast-merging binaries to be $\approx 5-401~\mathrm{Myr}$ (90% credibility). We discuss the implications for radio and gravitational-wave astronomy.
description: 16 pages, 10 figures, 3 tables
BAUMGÄRTNER, Ingrid; DEBBY, Nirit Ben-Aryeh; ḲOG'MAN-APEL, Ḳaṭrin, eds. – Maps and travel in the Middle Ages and the Early Modern period
Creators: name: Lopes, Paulo Catarino
Publisher: name: Lusitania Sacra
Year: 2023

description: Lusitania Sacra, n. 48 (2023): Relações entre o Papado e a Península Ibérica (séculos XI-XIII)
Combining AI Control Systems and Human Decision Support via Robustness and Criticality
Creators: name: Woods, Walt
name: Grushin, Alexander
name: Khan, Simon
name: Velasquez, Alvaro
Publisher: name: arXiv
Year: 2024
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences
subject: I.2.6
subject: 68T07

description: AI-enabled capabilities are reaching the requisite level of maturity to be deployed in the real world, yet do not always make correct or safe decisions. One way of addressing these concerns is to leverage AI control systems alongside and in support of human decisions, relying on the AI control system in safe situations while calling on a human co-decider for critical situations. We extend a methodology for adversarial explanations (AE) to state-of-the-art reinforcement learning frameworks, including MuZero. Multiple improvements to the base agent architecture are proposed. We demonstrate how this technology has two applications: for intelligent decision tools and to enhance training / learning frameworks. In a decision support context, adversarial explanations help a user make the correct decision by highlighting those contextual factors that would need to change for a different AI-recommended decision. As another benefit of adversarial explanations, we show that the learned AI control system demonstrates robustness against adversarial tampering. Additionally, we supplement AE by introducing strategically similar autoencoders (SSAs) to help users identify and understand all salient factors being considered by the AI system. In a training / learning framework, this technology can improve both the AI's decisions and explanations through human interaction. Finally, to identify when AI decisions would most benefit from human oversight, we tie this combined system to our prior art on statistically verified analyses of the criticality of decisions at any point in time.
description: 19 pages, 12 figures
TECHNICAL EFFICIENCY IN RUSSIAN AGRICULTURE
Creators: name: Bruck, Gregory
name: Grazhdaninova, Margarita
name: Lerman, Zvi
name: Uzun, Vasilii
name: Bruck, Gregory
name: Grazhdaninova, Margarita
name: Lerman, Zvi
name: Uzun, Vasilii
Publisher: name: Unknown
Year: 2006
Subjects: Research and Development/Tech Change/Emerging Technologies

description: For decades, Russian agriculture had had little technological progress and virtually no foreign investment, which resulted in a stable production possibilities frontier and made the sector ideally suited to production function analysis. The production function estimations reported in Chapters 10-13 add to a series of previous studies of the input/output relationship in Russian agriculture (e.g., Clayton, 1980, 1984; Gray, 1981; Johnson and Brooks, 1983), which generally followed the same methodology. In the late 1970s and the 1980s, however, the average response production functions gave way in the economics literature to more sophisticated production analysis techniques that measured not only productivity but technical efficiency as well (Aigner, et al., 1977; Bauer, 1990). Some of the major methodological advances in applying technical efficiency analysis to individual firms were made by a joint Russian-American team in Moscow in the early 1980s (Jondrow, et al., 1982; Danlin et al., 1985), but lack of data for many sectors of the Russian economy precluded the application of this technique until the end of the decade. When the Soviet Union collapsed, the initial optimistic expectation was that many sectors of the new Russian economy could rapidly achieve both higher productivity and higher technical efficiency once market forces prevailed. Our research attempts to understand why this has not happened in Russian agriculture in terms of technical efficiency.
The large-scale structure around the Fornax-Eridanus Complex
Creators: name: Raj, Maria Angela
name: Awad, Petra
name: Peletier, Reynier F.
name: Smith, Rory
name: Kuchner, Ulrike
name: van de Weygaert, Rien
name: Libeskind, Noam I.
name: Canducci, Marco
name: Tino, Peter
name: Bunte, Kerstin
Publisher: name: arXiv
Year: 2024
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Our objectives are to map the filamentary network around the Fornax-Eridanus Complex and probe the influence of the local environment on galaxy morphology. We employ the novel machine-learning tool, 1-DREAM (1-Dimensional, Recovery, Extraction, and Analysis of Manifolds) to detect and model filaments around the Fornax cluster. We then use the morphology-density relation of galaxies to examine the variation in the galaxies' morphology with respect to their distance from the central axis of the detected filaments. We detect 27 filaments that vary in length and galaxy-number density around the Fornax-Eridanus Complex. These filaments showcase a variety of environments; some filaments encompass groups/clusters, while others are only inhabited by galaxies in pristine filamentary environments. We also reveal a well-known structure -- the Fornax Wall, that passes through the Dorado group, Fornax cluster, and Eridanus supergroup. Regarding the morphology of galaxies, we find that early-type galaxies (ETGs) populate high-density filaments and high-density regions of the Fornax Wall. Furthermore, the fraction of ETGs decreases as the distance to the filament spine increases. Of the total galaxy population in filaments, ~7% are ETGs and ~24% are late-type galaxies (LTGs) located in pristine environments of filaments, while ~27% are ETGs and ~42% are LTGs in groups/clusters within filaments. This study reveals the Cosmic Web around the Fornax Cluster and asserts that filamentary environments are heterogeneous in nature. When investigating the role of the environment on galaxy morphology, it is essential to consider both, the local number-density and a galaxy's proximity to the filament spine. Within this framework, we ascribe the observed morphological segregation in the Fornax Wall to pre-processing of galaxies within groups embedded in it.
description: Accepted for publication in A&A. 21 pages with 15 figures
MOITA, Tiago – El libro hebreo iluminado en Portugal en la Edad Media (siglos XIII-XV)
Creators: name: Barreira, Catarina Fernandes
Publisher: name: Lusitania Sacra
Year: 2023

description: Lusitania Sacra, n. 48 (2023): Relações entre o Papado e a Península Ibérica (séculos XI-XIII)
Simulations of cluster ultra-diffuse galaxies in MOND
Creators: name: Nagesh, Srikanth T.
name: Freundlich, Jonathan
name: Famaey, Benoit
name: Bílek, Michal
name: Candlish, Graeme
name: Ibata, Rodrigo
name: Müller, Oliver
Publisher: name: arXiv
Year: 2024
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Ultra-diffuse galaxies (UDGs) in the Coma cluster have velocity dispersion profiles that are in full agreement with the predictions of Modified Newtonian Dynamics (MOND) in isolation. However, the external field effect (EFE) from the cluster seriously deteriorates this agreement. It has been suggested that this could be related to the fact that UDGs are out-of-equilibrium objects whose stars have been heated by the cluster tides or that they recently fell onto the cluster on radial orbits, such that their velocity dispersion may not reflect the EFE at their instantaneous distance from the cluster center. Here, we simulate UDGs within the Coma cluster in MOND, using the Phantom of Ramses (\textsc{por}) code, and show that if UDGs are initially at equilibrium within the cluster, tides are not sufficient to increase their velocity dispersions to values as high as the observed ones. On the other hand, if they are on a first radial infall onto the cluster, they can keep high velocity dispersions without being destroyed until their first pericentric passage. We conclude that, without alterations such as a screening of the EFE in galaxy clusters or much higher baryonic masses than currently estimated, in the MOND context UDGs must be out-of-equilibrium objects on their first infall onto the cluster.
description: 10 Pages, 9 Figures, accepted by A&A
Path Interdependence Among Early and Late Bloomers in a Dynamic Heckscher-Ohlin Model
Creators: name: Gaitan, Beatriz
name: Roe, Terry L.
name: Gaitan, Beatriz
name: Roe, Terry L.
Publisher: name: Unknown
Year: 2007
Subjects: subject: International Relations/Trade
subject: International trade
subject: Development
subject: Multiple Equilibria

description: The closed economy neoclassical growth model predicts convergence to a capital stock level that is independent of its initial level, suggesting that discrepancies in per capita income among the world’s economies should largely disappear in the long-run. This paper shows that international trade among countries differing only in their level of initial capital is sufficient to generate long-run income differences across countries. The long-run level of capital of the country most initially endowed with capital is shown to exceed the level of capital otherwise obtained in autarchy while the country least endowed converges to a capital stock lower than would otherwise be obtained in autarchy.
Methodological reconstruction of historical seismic events from anecdotal accounts of destructive tsunamis: a case study for the great 1852 Banda arc mega-thrust earthquake and tsunami
Creators: name: Ringer, Hayden
name: Whitehead, Jared P.
name: Krometis, Justin
name: Harris, Ronald A.
name: Glatt-Holtz, Nathan
name: Giddens, Spencer
name: Ashcraft, Claire
name: Carver, Garret
name: Robertson, Adam
name: Harward, McKay
name: Fullwood, Joshua
name: Lightheart, Kameron
name: Hilton, Ryan
name: Avery, Ashley
name: Kesler, Cody
name: Morrise, Martha
name: Klein, Michael Hunter
Publisher: name: arXiv
Year: 2020
Subjects: subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: We demonstrate the efficacy of a Bayesian statistical inversion framework for reconstructing the likely characteristics of large pre-instrumentation earthquakes from historical records of tsunami observations. Our framework is designed and implemented for the estimation of the location and magnitude of seismic events from anecdotal accounts of tsunamis including shoreline wave arrival times, heights, and inundation lengths over a variety of spatially separated observation locations. As an initial test case we use our framework to reconstruct the great 1852 earthquake and tsunami of eastern Indonesia. Relying on the assumption that these observations were produced by a subducting thrust event, the posterior distribution indicates that the observables were the result of a massive mega-thrust event with magnitude near 8.8 Mw and a likely rupture zone in the north-eastern Banda arc. The distribution of predicted epicentral locations overlaps with the largest major seismic gap in the region as indicated by instrumentally recorded seismic events. These results provide a geologic and seismic context for hazard risk assessment in coastal communities experiencing growing population and urbanization in Indonesia. In addition, the methodology demonstrated here highlights the potential for applying a Bayesian approach to enhance understanding of the seismic history of other subduction zones around the world.
Optimal values of rovibronic energy levels for triplet electronic states of molecular deuterium
Creators: name: Lavrov, B. P.
name: Umrikhin, I. S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Optics (physics.optics)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Optimal set of 1050 rovibronic energy levels for 35 triplet electronic states of $D_2$ has been obtained by means of a statistical analysis of all available wavenumbers of triplet-triplet rovibronic transitions studied in emission, absorption, laser and anticrossing spectroscopic experiments of various authors. We used a new method of the analysis (Lavrov, Ryazanov, JETP Letters, 2005), which does not need any \it a priory \rm assumptions concerning the molecular structure being based on only two fundamental principles: Rydberg-Ritz and maximum likelihood. The method provides the opportunity to obtain the RMS estimates for uncertainties of the experimental wavenumbers independent from those presented in original papers. 234 from 3822 published wavenumber values were found to be spurious, while the remaining set of the data may be divided into 20 subsets (samples) of uniformly precise data having close to normal distributions of random errors within the samples. New experimental wavenumber values of 125 questionable lines were obtained in the present work. Optimal values of the rovibronic levels were obtained from the experimental data set consisting of 3713 wavenumber values (3588 old and 125 new). The unknown shift between levels of ortho- and para- deuterium was found by least squares analysis of the $a^3Σ_g^+$, $v = 0$, $N = 0 ÷18$ rovibronic levels with odd and even values of $N$. All the energy levels were obtained relative to the lowest vibro-rotational level ($v = 0$, $N = 0$) of the $a^3Σ_g^+$ electronic state, and presented in tabular form together with the standard deviations of the empirical determination. New energy level values differ significantly from those available in literature.
description: 46 pages, 9 pictures
Interaction of electrons with acoustic phonons in AlN/GaN resonant tunnelling nanostructures at different temperatures
Creators: name: Boyko, I. V.
name: Petryk, M. R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The theory of the interaction of electrons with acoustic phonons in multilayer nitride-based AlN/GaN nanostructures was developed for the first time at $T\geqslant 0$ using the method of finite-temperature Green's functions and Dyson equation. Components of the Hamiltonian describing the system of electrons with acoustic phonons and the magnitudes of the electron spectrum shifts due to the electron-phonon interaction were obtained. Dependences of the electronic spectrum levels and spectrum of the acoustic phonons were found depending on the position of the internal potential barrier in the studied nanostructure. The temperature shifts of the electronic spectrum and decay rates were calculated for various values of temperature $T$.
description: 17 pages, 5 figures, 1 table
Frequency-Dependent Shift in the Image Centroid of the Black Hole at the Galactic Center as a Test of General Relativity
Creators: name: Broderick, Avery E.
name: Loeb, Abraham
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The inferred black hole in the Galactic center spans the largest angle on the sky among all known black holes. Forthcoming observational programs plan to localize or potentially resolve the image of Sgr A* to an exquisite precision, comparable to the scale of the black hole horizon. Here we show that the location of the image centroid of Sgr A* should depend on observing frequency because of relativistic and radiative transfer effects. The same effects introduce a generic dependence of the source polarization on frequency. Future detection of the predicted centroid shift and the polarization dependence on frequency can be used to determine the unknown black hole spin and verify the validity of General Relativity.
description: Submitted to ApJ Letters
CAMPOS, Maria Amélia Álvaro de – A comemoração dos mortos no calendário dos vivos: o obituário medieval da Colegiada de São Bartolomeu de Coimbra
Creators: name: Rêpas, Luís Miguel
Publisher: name: Lusitania Sacra
Year: 2023

description: Lusitania Sacra, n. 48 (2023): Relações entre o Papado e a Península Ibérica (séculos XI-XIII)
Holographic teleportation in higher dimensions
Creators: name: Ahn, Byoungjoon
name: Ahn, Yongjun
name: Bak, Sang-Eon
name: Jahnke, Viktor
name: Kim, Keun-Young
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study higher-dimensional traversable wormholes in the context of Rindler-AdS/CFT. The hyperbolic slicing of a pure AdS geometry can be thought of as a topological black hole that is dual to a conformal field theory in the hyperbolic space. The maximally extended geometry contains two exterior regions (the Rindler wedges of AdS) which are connected by a wormhole. We show that this wormhole can be made traversable by a double trace deformation that violates the average null energy condition (ANEC) in the bulk. We find an analytic formula for the ANEC violation that generalizes Gao-Jafferis-Wall result to higher-dimensional cases, and we show that the same result can be obtained using the eikonal approximation. We show that the bound on the amount of information that can be transferred through the wormhole quickly reduces as we increase the dimensionality of spacetime. We also compute a two-sided commutator that diagnoses traversability and show that, under certain conditions, the information that is transferred through the wormhole propagates with butterfly speed $v_B = \frac{1}{d-1}$.
description: 36 pages, 10 figures