cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
RePBubLik: Reducing the Polarized Bubble Radius with Link Insertions
Creators: name: Haddadan, Shahrzad
name: Menghini, Cristina
name: Riondato, Matteo
name: Upfal, Eli
Publisher: name: arXiv
Year: 2021
Subjects: subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: The topology of the hyperlink graph among pages expressing different opinions may influence the exposure of readers to diverse content. Structural bias may trap a reader in a polarized bubble with no access to other opinions. We model readers' behavior as random walks. A node is in a polarized bubble if the expected length of a random walk from it to a page of different opinion is large. The structural bias of a graph is the sum of the radii of highly-polarized bubbles. We study the problem of decreasing the structural bias through edge insertions. Healing all nodes with high polarized bubble radius is hard to approximate within a logarithmic factor, so we focus on finding the best $k$ edges to insert to maximally reduce the structural bias. We present RePBubLik, an algorithm that leverages a variant of the random walk closeness centrality to select the edges to insert. RePBubLik obtains, under mild conditions, a constant-factor approximation. It reduces the structural bias faster than existing edge-recommendation methods, including some designed to reduce the polarization of a graph.
The Influence of s-wave interactions on focussing of atoms
Creators: name: Kordbacheh, A. M.
name: Martin, A. M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The focusing of a rubidium Bose-Einstein condensate via an optical lattice potential is numerically investigated. The results are compared with a classical trajectory model which under-estimates the full width half maximum of the focused beam. Via the inclusion of the effects of interactions, in the Bose-Einstein condensate, into the classical trajectory model we show that it is possible to obtain reliable estimates for the full width half maximum of the focused beam when compared to numerical integration of the Gross-Pitaevskii equation. Finally, we investigate the optimal regimes for focusing and find that for a strongly interacting Bose-Einstein condensate focusing of order 20 nm may be possible.
description: 14 Pages, 13 figures
flavomaculatus LINSTOW
Creators: name: Árpád, Soós
Publisher: name: Zenodo
Year: 1940
Subjects: Biodiversity
Taxonomy
Animalia
Nematoda
Chromadorea
Rhabditida
Criconematidae

description: 16. flavomaculatus LINSTOW
— II. Tihany (16).
description: Published as part of Árpád, Soós, 1940, Magyarország szabadon élő fonalférgeinek jegyzéke, pp. 79-97 in Annales historico-naturales Musei nationalis hungarici 33 on page 84, DOI: 10.5281/zenodo.10838638
Evidence of Luttinger liquid behavior in one-dimensional dipolar quantum gases
Creators: name: Citro, R.
name: Orignac, E.
name: De Palo, S.
name: Chiofalo, M. -L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The ground state and structure of a one-dimensional Bose gas with dipolar repulsions is investigated at zero temperature by a combined Reptation Quantum Monte Carlo (RQMC) and bosonization approach. A non trivial Luttinger-liquid behavior emerges in a wide range of intermediate densities, evolving into a Tonks-Girardeau gas at low density and into a classical quasi-ordered state at high density. The density dependence of the Luttinger exponent is extracted from the numerical data, providing analytical predictions for observable quantities, such as the structure factor and the momentum distribution. We discuss the accessibility of such predictions in current experiments with ultracold atomic and molecular gases.
description: 4 pages, 3 EPS figures, Revtex 4
Dorylaimus gracilis DE MAN
Creators: name: Árpád, Soós
Publisher: name: Zenodo
Year: 1940
Subjects: Biodiversity
Taxonomy
Animalia
Nematoda
Chromadorea
Rhabditida
Criconematidae
Dorylaimus
Dorylaimus gracilis

description: 17. gracilis DE MAN
— I. Pilis-hegység [Hofmann-forrás] (28); III. Körmöcbánya (28), Nagysalló (28), Szklenófürdő (28); V. Retyezát [Bukura-tó] (7).
description: Published as part of Árpád, Soós, 1940, Magyarország szabadon élő fonalférgeinek jegyzéke, pp. 79-97 in Annales historico-naturales Musei nationalis hungarici 33 on page 84, DOI: 10.5281/zenodo.10838638
Open Hardware is ready to help Technology Transfer Offices (TTOs) maximise the impact of academic research
Creators: name: Arancio, Julieta
name: Molloy, Jenny
Publisher: name: Zenodo
Year: 2021
Subjects: open hardware
technology transfer
open science

description: On March 8th and April 14th of 2021, members of the Gathering for Open Science Hardware (GOSH) community convened two virtual writing workshops with open hardware practitioners and technology transfer officers to discuss the potential of open hardware for Technology Transfer Offices (TTOs). This policy brief is the culmination of these discussions, highlighting how open hardware provides opportunities for TTOs outside of the current patent-and-license model and characterizing what is needed in order to support the adoption of open hardware by TTOs. Key Messages 1. Open hardware provides an opportunity for Technology Transfer Offices (TTOs) at universities to exploit the potential of existing academic outputs that do not fit in the current patent-and-licence technology transfer paradigm. 2. It is possible for TTOs to adopt open hardware as part of their technology transfer toolbox today. 3. As seen with the response to the COVID-19 crisis, open hardware accelerates innovation, opening up the possibility of new multi-scale partnerships with stakeholders in industry, civil society and government. 4. The open hardware community can work with TTOs on strategies to facilitate this transition, including the development of dedicated training materials and activities, fostering connections between TTOs, and identifying community champions at universities that can serve as focal points. This work was made possible by support from the Alfred P. Sloan Foundation to Gathering for Open Science Hardware, Inc.
The superradiant instability spectrum of the hydrodynamic vortex model
Creators: name: Hod, Shahar
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study analytically the superradiant instability properties of the hydrodynamic vortex model, an asymptotically flat acoustic geometry which, like the spinning Kerr black-hole spacetime, possesses an effective ergoregion. In particular, we derive a compact analytical formula for the complex resonant frequencies that characterize the long-wavelength dynamics of sound modes in this physically interesting acoustic spacetime.
description: 8 pages
A field test of the degree of coevolution between red alder and Frankia populations
Creators: name: Markham, John Herbert
Publisher: name: University of British Columbia
Year: 2009

description: A cross inoculation experiment was set up to examine the degree of coevolution between red alder (Alnus rubra Bong.) and Frankia populations and to test the competitive ability of red dlAer/Frankia combinations under different field conditions. Seedlings from high and low elevation populations from three watersheds in southwestern B. C. were inoculated with Frankia from the parent tree populations and planted into three high and three low elevation planting sites in the U.B.C.M.K. Research Forest. Seedlings were also inoculated with Frankia from trees near the planting sites. To examine the effect of neighbours on plant growth, each combination was planted with and without red alder neighbours. There was a significant interaction between planting elevation, parent and Frankia source. On low elevation sites, the final yield of plants inoculated with Frankia from their parent's elevation was half that of plants inoculated with Frankia from the opposite elevation. There was also an inverse relationship between yield and the proportion of fixed nitrogen in leaves for the different dldex/Frankia combinations. On high elevation sites, final yield was 3.6 times lower and nitrogen fixation levels were two times higher than on the low elevation sites. On these sites, plants inoculated with Frankia from their parents grew significantly more than plants inoculated with Frankia from any novel source. These data suggest that Frankia can evolve to a less mutualistic state and that expression of this effect depends on environmental conditions. It is predicted that less mutualistic Frankia will evolve in situations where the relationship with the host is likely to break down. The presence of neighbours reduced the growth of plants by half but had no effect on the interaction between plmt/Frankia combinations. There was no significant difference in plant yield when plants had neighbours from different parent elevations. In terms of productivity, total harvested plant mass per site ranged from 22,000 to 302 grams. Competitive intensity did not vary across sites, except that on the lowest productivity site, where no competitive effect was detectable, plants with neighbours were 44 % larger than plants without neighbours. On all other sites, the mass of plants with neighbours, relative to the mass of plants without neighbours, decreased over the course of the experiment. The plants in this experiment were attacked by woolly alder sawfly, Eriocampa ovata (L.). The sawflies attacked the fastest growing individuals on low elevation sites, resulting in decreased growth in late summer, 1993. This made observed differences between treatments conservative estimates of potential differences. The only exception to this pattern was that plants with neighbours had a higher degree of herbivore damage than plants without neighbours, confounding the effects of competition and herbivory.
Production planning for value added lumber manufacturing
Creators: name: Donald, William Stuart
Publisher: name: University of British Columbia
Year: 2009

description: Difficulties in effectively managing opportunities for value added lumber manufacturing facilities have led to a need to develop production planning systems for these facilities. Two linear programming based models were developed for this purpose. One model is designed for independent value facilities; the other is designed for integrated value added facilities. In demonstrating the use of the models, analyses were made of a study operation. The purpose of these analyses, was to explore the influences value added facility production policies have on sawmill production decisions for an integrated value added facility. The results suggest that value added facility production decisions can have significant influence on sawmill production decisions for an integrated valued added production operation.
Dorylaimus halophilus Daday 1897
Creators: name: Árpád, Soós
Publisher: name: Zenodo
Year: 1940
Subjects: Biodiversity
Taxonomy
Animalia
Nematoda
Chromadorea
Rhabditida
Criconematidae
Dorylaimus
Dorylaimus halophilus

description: 18. halophilus [DADAY]—
I. Dabas (2, 3, 10), Kúnszentmiklós (2, 3, 10), Szatymaz (2, 3, 10).
description: Published as part of Árpád, Soós, 1940, Magyarország szabadon élő fonalférgeinek jegyzéke, pp. 79-97 in Annales historico-naturales Musei nationalis hungarici 33 on page 85, DOI: 10.5281/zenodo.10838638
A one-dimensional morphoelastic model for burn injuries: sensitivity analysis and a feasibility study
Creators: name: Egberts, Ginger
name: Vermolen, Fred
name: van Zuijlen, Paul
Publisher: name: arXiv
Year: 2020
Subjects: subject: Numerical Analysis (math.NA)
subject: Biological Physics (physics.bio-ph)
subject: Tissues and Organs (q-bio.TO)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: We consider a one-dimensional morphoelastic model describing post-burn scar contraction. This model describes the displacement of the dermal layer of the skin and the development of the effective Eulerian strain in the tissue. Besides these components, the model also contains components that play a major role in skin repair after trauma. These components are signaling molecules, fibroblasts, myofibroblasts, and collagen. We perform a sensitivity analysis for many parameters of the model and use the results for a feasibility study. In this study, we test whether the model is suitable for predicting the extent of contraction in different age groups. To this end, we conduct an extensive literature review to find parameter values. From the sensitivity analysis, we conclude that the most sensitive parameters are the equilibrium collagen concentration in the dermal layer, the apoptosis rate of fibroblasts and myofibroblasts, and the secretion rate of signaling molecules. Further, although we can use the model to simulate distinct contraction densities in different age groups, our results differ from what is seen in the clinic.
Icosahedral quasicrystals for visible wavelengths by optical interference holography
Creators: name: Xu, Jun
name: Ma, Rui
name: Wang, Xia
name: Tam, Wing Yim
Publisher: name: arXiv
Year: 2007
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Quasicrystals, realized in metal alloys, are a class of lattices exhibiting symmetries that fall outside the usual classification for periodic crystals. They do not have translational symmetry and yet the lattice points are well ordered. Furthermore, they exhibit higher rotational symmetry than periodic crystals. Because of the higher symmetry (more spherical), they are more optimal than periodic crystals in achieving complete photonic bandgaps in a new class of materials called photonic crystals in which the propagation of light in certain frequency ranges is forbidden. The potential of quasicrystals has been demonstrated in two dimensions for the infrared range and, recently, in three-dimensional icosahedral quasicrystals fabricated using a stereo lithography method for the microwave range. Here, we report the fabrication and optical characterization of icosahedral quasicrystals using a holographic lithography method for the visible range. The icosahedral pattern, generated using a novel 7-beam optical interference holography, is recorded on photoresists and holographic plates. Electron micrographs of the photoresist samples show clearly the symmetry of the icosahedral quasicrytals in the submicron range, while the holographic plate samples exhibit bandgaps in the angular-dependent transmission spectra in the visible range. Calculations of the bandgaps due to reflection planes inside the icosahedral quasicrystal show good agreement with the experimental results.
description: 12 pages, 4 figures
Pola4All: survey of polarimetric applications and an open-source toolkit to analyze polarization
Creators: name: Rodriguez, Joaquin
name: Lew-Yan-Voon, Lew-Fock-Chong
name: Martins, Renato
name: Morel, Olivier
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Polarization information of the light can provide rich cues for computer vision and scene understanding tasks, such as the type of material, pose, and shape of the objects. With the advent of new and cheap polarimetric sensors, this imaging modality is becoming accessible to a wider public for solving problems such as pose estimation, 3D reconstruction, underwater navigation, and depth estimation. However, we observe several limitations regarding the usage of this sensorial modality, as well as a lack of standards and publicly available tools to analyze polarization images. Furthermore, although polarization camera manufacturers usually provide acquisition tools to interface with their cameras, they rarely include processing algorithms that make use of the polarization information. In this paper, we review recent advances in applications that involve polarization imaging, including a comprehensive survey of recent advances on polarization for vision and robotics perception tasks. We also introduce a complete software toolkit that provides common standards to communicate with and process information from most of the existing micro-grid polarization cameras on the market. The toolkit also implements several image processing algorithms for this modality, and it is publicly available on GitHub: https://github.com/vibot-lab/Pola4all_JEI_2023.
Contribution of residual quasiparticles to the characteristics of superconducting thin-film resonators
Creators: name: Noguchi, T.
name: Mima, S.
name: Otani, C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: It is shown that there are a significant number of quasiparticles present in the superconductor even at the temperature far below the transition temperature and that those quasiparticles seriously contribute to the characteristics of superconducting thin-film resonators.
description: 5 pages, 6 figures, and 1 table. It is submitted to IEEE TAS
Independence in the Home: A Wearable Interface for a Person with Quadriplegia to Teleoperate a Mobile Manipulator
Creators: name: Padmanabha, Akhil
name: Gupta, Janavi
name: Chen, Chen
name: Yang, Jehan
name: Nguyen, Vy
name: Weber, Douglas J.
name: Majidi, Carmel
name: Erickson, Zackory
Publisher: name: arXiv
Year: 2023
Subjects: subject: Robotics (cs.RO)
subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Teleoperation of mobile manipulators within a home environment can significantly enhance the independence of individuals with severe motor impairments, allowing them to regain the ability to perform self-care and household tasks. There is a critical need for novel teleoperation interfaces to offer effective alternatives for individuals with impairments who may encounter challenges in using existing interfaces due to physical limitations. In this work, we iterate on one such interface, HAT (Head-Worn Assistive Teleoperation), an inertial-based wearable integrated into any head-worn garment. We evaluate HAT through a 7-day in-home study with Henry Evans, a non-speaking individual with quadriplegia who has participated extensively in assistive robotics studies. We additionally evaluate HAT with a proposed shared control method for mobile manipulators termed Driver Assistance and demonstrate how the interface generalizes to other physical devices and contexts. Our results show that HAT is a strong teleoperation interface across key metrics including efficiency, errors, learning curve, and workload. Code and videos are located on our project website.
On positivity of orthogonal series and its applications in probability
Creators: name: Szabłowski, Paweł J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Probability (math.PR)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 33C45, 42C10, 60E99, 60E05, 60J35

description: We give necessary and sufficient conditions for an orthogonal series to converge in the mean-squares to a nonnegative function. We present many examples and applications, in analysis and probability. In particular, we give necessary and sufficient conditions for a Lancaster-type of expansion $% \sum_{n\geq 0}c_{n}α_{n}(x)β_{n}(y)$ with two sets of orthogonal polynomials $\left\{ α_{n}\right\} $ and $\left\{ β_{n}\right\} $ to converge in means-squares to a nonnegative bivariate function. In particular, we study the properties of the set $C(α,β)$ of the sequences $\left\{ c_{n}\right\} ,$ for which the above-mentioned series converge to a nonnegative function and give conditions for the membership to it. Further we show that the class of bivariate distributions for which a Lancaster type expansion can be found, is the same as the class of distributions having all conditional moments in the form of polynomials in the conditioning random variable.
description: 17
Tylencholaimus limnophilus DE MAN —
Creators: name: Árpád, Soós
Publisher: name: Zenodo
Year: 1940
Subjects: Biodiversity
Taxonomy
Animalia
Nematoda
Chromadorea
Rhabditida
Hemicycliophoridae
Tylencholaimus
Tylencholaimus limnophilus

description: 19. limnophilus DE MAN—
I. Pomáz [Tólak] (27); II. Balaton (7), Balatonboglár (9, 10, 11).
description: Published as part of Árpád, Soós, 1940, Magyarország szabadon élő fonalférgeinek jegyzéke, pp. 79-97 in Annales historico-naturales Musei nationalis hungarici 33 on page 85, DOI: 10.5281/zenodo.10838638
Building a community for FAIR Data
Creators: name: Clare, Connie
Publisher: name: Zenodo
Year: 2021

description: Connie Clare, Community Manager, 4TU.ResearchData

 4TU.ResearchData is an international data repository for science, engineering and design disciplines. Built around the technical infrastructure, the online community comprises researchers, research data supporters (data stewards, data managers, research software engineers, IT and communications specialists) and technical experts (repository back office staff). The goal of the community is to provide an inclusive space for members to connect and exchange knowledge about best practices for the creation and reuse of FAIR data within diverse scientific domains. This includes the development and provision of discipline-specific guidance, training and resources to support researchers in making their data Findable, Accessible, Interoperable and Reusable (The FAIR Principles). About the presentation:
 This presentation was delivered during an online webinar organised by Antionette Beumer (University of Applied Sciences) to gain insight as they develop their DCC Hub.
The first measurement of $B$ meson semi-leptonic decay contribution to non-photonic electrons at RHIC
Creators: name: Lin, Xiaoyan
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We present the first measurement for the $B$ meson semi-leptonic decay contribution to non-photonic electrons at RHIC using non-photonic electron azimuthal correlations with charged hadrons in p+p collisions at $\sqrt{s_{NN}} = 200$ GeV from STAR.
description: 4 pages, 3 figures, Quark Matter 2006 Proceedings, to appear in J. Phys. G
Stories and conversations
Creators: name: Aguilar, Virginia
name: Friedricks, Mary
name: Silva, Cecile
name: Gamble, Geoffrey
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2024
Subjects: subject: yok

description: 2 WAV files. Side 1: Mary Friedricks and Cecile Silva discuss their mother's songs including Coyote song, Fly song, and others. Side 2: continuation. No notes.
The turbulent bubble break-up cascade. Part 2. Numerical simulations of breaking waves
Creators: name: Chan, Wai Hong Ronald
name: Johnson, Perry L.
name: Moin, Parviz
name: Urzay, Javier
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Physical sciences

description: Breaking waves generate a distribution of bubble sizes that evolves over time. Knowledge of how this distribution evolves is of practical importance for maritime and climate studies. The analytical framework developed in Part 1 examined how this evolution is governed by the bubble-mass flux from large to small bubble sizes, which depends on the rate of break-up events and the distribution of child bubble sizes. These statistics are measured in Part 2 as ensemble-averaged functions of time by simulating ensembles of breaking waves, and identifying and tracking individual bubbles and their break-up events. The break-up dynamics are seen to be statistically unsteady, and two intervals with distinct characteristics were identified. In the first interval, the dissipation rate and bubble-mass flux are quasi-steady, and the theoretical analysis of Part 1 is supported by all observed statistics, including the expected -10/3 power-law exponent for the super-Hinze-scale size distribution. Strong locality is observed in the corresponding bubble-mass flux, supporting the presence of a super-Hinze-scale break-up cascade. In the second interval, the dissipation rate decays, and the bubble-mass flux increases as small- and intermediate-sized bubbles become more populous. This flux remains strongly local with cascade-like behaviour, but the dominant power-law exponent for the size distribution increases to -8/3 as small bubbles are also depleted more quickly. This suggests the emergence of different physical mechanisms during different phases of the breaking-wave evolution, although size-local break-up remains a dominant theme. Parts 1 and 2 present an analytical toolkit for population balance analysis in two-phase flows.
description: Under review for the Journal of Fluid Mechanics. Several figure placements were affected by arXiv's processing; contact authors for the original submitted manuscript
Slow dynamics, aging, and glassy rheology in soft and living matter
Creators: name: Bandyopadhyay, Ranjini
name: Liang, Dennis
name: Harden, James L.
name: Leheny, Robert L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We explore the origins of slow dynamics, aging and glassy rheology in soft and living matter. Non-diffusive slow dynamics and aging in materials characterised by crowding of the constituents can be explained in terms of structural rearrangement or remodelling events that occur within the jammed state. In this context, we introduce the jamming phase diagram proposed by Liu and Nagel to understand the ergodic-nonergodic transition in these systems, and discuss recent theoretical attempts to explain the unusual, faster-than-exponential dynamical structure factors observed in jammed soft materials. We next focus on the anomalous rheology (flow and deformation behaviour) ubiquitous in soft matter characterised by metastability and structural disorder, and refer to the Soft Glassy Rheology (SGR) model that quantifies the mechanical response of these systems and predicts aging under suitable conditions. As part of a survey of experimental work related to these issues, we present x-ray photon correlation spectroscopy (XPCS) results of the aging of laponite clay suspensions following rejuvenation. We conclude by exploring the scientific literature for recent theoretical advances in the understanding of these models and for experimental investigations aimed at testing their predictions.
description: 22 pages, 5 postscript figures; invited review aricle, to appear in special issue on soft matter in Solid State Communications
Trilobus longicaudatus BUTSCHLI II. Darany
Creators: name: Árpád, Soós
Publisher: name: Zenodo
Year: 1940
Subjects: Biodiversity
Taxonomy
Animalia
Nematoda
Enoplea
Triplonchida
Tobrilidae
Trilobus
Trilobus longicaudatus

description: 20. longicaudatus BÜTSCHLI—
II. Darány [Aranyos-puszta] (27), Hámortó (Madárdai-patak vöigye] (25); III. Szkienófürdő (28).
description: Published as part of Árpád, Soós, 1940, Magyarország szabadon élő fonalférgeinek jegyzéke, pp. 79-97 in Annales historico-naturales Musei nationalis hungarici 33 on page 85, DOI: 10.5281/zenodo.10838638
Protocol Development Workshop
Creators: name: Vojvodic, Sofija
name: Dressler, Corinna
name: Bannach-Brown, Alexandra
name: McCann, Sarah
name: CAMARADES Berlin
name: Rackoll, Torsten
name: Arroyo-Araujo, María
Publisher: name: OSF
Year: 2022
Subjects: preclinical systematic review
protocol development
systematic review
systematic review education

description: Lectures, materials and activities for "Protocol Development for Systematic Review & Meta-Analysis of Animal Studies" Workshop. Contact camarades.berlin@charite.de for any enquiries.
Adaptive trajectory-constrained exploration strategy for deep reinforcement learning
Creators: name: Wang, Guojian
name: Wu, Faguo
name: Zhang, Xiao
name: Guo, Ning
name: Zheng, Zhiming
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Deep reinforcement learning (DRL) faces significant challenges in addressing the hard-exploration problems in tasks with sparse or deceptive rewards and large state spaces. These challenges severely limit the practical application of DRL. Most previous exploration methods relied on complex architectures to estimate state novelty or introduced sensitive hyperparameters, resulting in instability. To mitigate these issues, we propose an efficient adaptive trajectory-constrained exploration strategy for DRL. The proposed method guides the policy of the agent away from suboptimal solutions by leveraging incomplete offline demonstrations as references. This approach gradually expands the exploration scope of the agent and strives for optimality in a constrained optimization manner. Additionally, we introduce a novel policy-gradient-based optimization algorithm that utilizes adaptively clipped trajectory-distance rewards for both single- and multi-agent reinforcement learning. We provide a theoretical analysis of our method, including a deduction of the worst-case approximation error bounds, highlighting the validity of our approach for enhancing exploration. To evaluate the effectiveness of the proposed method, we conducted experiments on two large 2D grid world mazes and several MuJoCo tasks. The extensive experimental results demonstrate the significant advantages of our method in achieving temporally extended exploration and avoiding myopic and suboptimal behaviors in both single- and multi-agent settings. Notably, the specific metrics and quantifiable results further support these findings. The code used in the study is available at \url{https://github.com/buaawgj/TACE}.
description: 35 pages, 36 figures; accepted by Knowledge-Based Systems, not published
A translation-invariant renormalizable non-commutative scalar model
Creators: name: Gurau, R.
name: Magnen, J.
name: Rivasseau, V.
name: Tanasa, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences
subject: 81T15; 81T75

description: In this paper we propose a translation-invariant scalar model on the Moyal space. We prove that this model does not suffer from the UV/IR mixing and we establish its renormalizability to all orders in perturbation theory.
description: 17 pages, 3 figures
Solutions by quadratures of complex Bernoulli differential equations and their quantum deformation
Creators: name: Campoamor-Stursberg, Rutwig
name: Fernandez-Saiz, Eduardo
name: Herranz, Francisco J.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mathematical Physics (math-ph)
subject: Dynamical Systems (math.DS)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 17B66, 17B80, 34A26, 34A34

description: It is shown that the complex Bernoulli differential equations admitting the supplementary structure of a Lie-Hamilton system related to the book algebra $\mathfrak{b}_2$ can always be solved by quadratures, providing an explicit solution of the equations. In addition, considering the quantum deformation of Bernoulli equations, their canonical form is obtained and an exact solution by quadratures is deduced as well. It is further shown that the approximations of $k^{th}$-order in the deformation parameter from the quantum deformation are also integrable by quadratures, although an explicit solution cannot be obtained in general. Finally, the multidimensional quantum deformation of the book Lie-Hamilton systems is studied, showing that, in contrast to the multidimensional analogue of the undeformed system, the resulting system is coupled in a non-trivial form.
description: 22 pages
Spin polarization recovery and Hanle effect for charge carriers interacting with nuclear spins in semiconductors
Creators: name: Smirnov, D. S.
name: Zhukov, E. A.
name: Yakovlev, D. R.
name: Kirstein, E.
name: Bayer, M.
name: Greilich, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report on theoretical and experimental study of the spin polarization recovery and Hanle effect for the charge carriers interacting with the fluctuating nuclear spins in the semiconductor structures. We start the theoretical description from the simplest model of static and isotropic nuclear spin fluctuations. Then we describe the modification of the polarization recovery and Hanle curves due to the anisotropy of the hyperfine interaction, finite nuclear spin correlation time, and the strong pulsed spin excitation. For the latter case, we describe the resonance spin amplification effect in the Faraday geometry and discuss the manifestations of the quantum Zeno effect. The set of the experimental results for various structures and experimental conditions is chosen to highlight the specific effects predicted theoretically. We show that the spin polarization recovery is a very valuable tool for addressing carrier spin dynamics in semiconductors and their nanostructures.
description: 16 pages, 15 figures
Two-body and Three-body Decays of Charginos in One-loop Order in MSSM
Creators: name: Junpei, Fujimoto
name: Tadashi, Ishikawa
name: Masato, Jimbo
name: Tadashi, Kon
name: Yoshimasa, Kurihara
name: Masaaki, Kuroda
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present the renormalization scheme used in and the characteristic features of GRACE/SUSY-loop, the package of the program for the automatic calculation of the MSSM processes including one-loop order corrections. The two-body and three-body decay widths of charginos in one-loop order evaluated by GRACE/SUSY-loop are shown.
description: 28 pages, 2 figures; Corrected typos on Table 7
On random convex chains, orthogonal polynomials, PF sequences and probabilistic limit theorems
Creators: name: Gusakova, Anna
name: Thäle, Christoph
Publisher: name: arXiv
Year: 2020
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 33C47, 52A22, 60D05, 60F05

description: Let $T$ be the triangle in the plane with vertices $(0,0)$, $(0,1)$ and $(0,1)$. The convex hull of $(0,1)$, $(1,0)$ and $n$ independent random points uniformly distributed in $T$ is the random convex chain $T_n$. A three-term recursion for the probability generating function $G_n$ of the number $f_0(T_n)$ of vertices of $T_n$ is proved. Via the link to orthogonal polynomials it is shown that $G_n$ has precisely $n$ distinct real roots in $(-\infty,0]$ and that the sequence $p_k^{(n)}:=\mathbb{P}(f_0(T_n)=k)$, $k=1,\ldots,n$, is a Polya frequency (PF) sequence. A selection of probabilistic consequences of this surprising and remarkable fact are discussed in detail.
Dorylaimus microdorus DE MAN II. Balaton
Creators: name: Árpád, Soós
Publisher: name: Zenodo
Year: 1940
Subjects: Biodiversity
Taxonomy
Animalia
Nematoda
Chromadorea
Rhabditida
Criconematidae
Dorylaimus
Dorylaimus microdorus

description: 22. microdorus DE MAN
II. Balaton (7), Szántód (9, 10, 11).
description: Published as part of Árpád, Soós, 1940, Magyarország szabadon élő fonalférgeinek jegyzéke, pp. 79-97 in Annales historico-naturales Musei nationalis hungarici 33 on page 85, DOI: 10.5281/zenodo.10838638
Spatiotemporal solitons in dispersion-managed multimode fibers
Creators: name: Mayteevarunyoo, Thawatchai
name: Malomed, Boris A.
name: Skryabin, Dmitry V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We develop the scheme of dispersion management (DM) for three-dimensional (3D) solitons in a multimode optical fiber. It is modeled by the parabolic confining potential acting in the transverse plane in combination with the cubic self-focusing. The DM map is adopted in the form of alternating segments with anomalous and normal group-velocity dispersion. Previously, temporal DM solitons were studied in detail in single-mode fibers, and some solutions for 2D spatiotemporal "light bullets", stabilized by DM, were found in the model of a planar waveguide. By means of numerical methods, we demonstrate that stability of the 3D spatiotemporal solitons is determined by the usual DM-strength parameter, $S$: they are quasi-stable at $ SS_{0}$. Stable vortex solitons are constructed too. We also consider collisions between the 3D solitons, in both axial and transverse directions. The interactions are quasi-elastic, including periodic collisions between solitons which perform shuttle motion in the transverse plane.
description: 15 pages, 13 figures, to be published in Journal of Optics
Scheduling of Operations in Quantum Compiler
Creators: name: Itoko, Toshinari
name: Imamichi, Takashi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: When scheduling quantum operations, a shorter overall execution time of the resulting schedule yields a better throughput and higher fidelity output. In this paper, we demonstrate that quantum operation scheduling can be interpreted as a special type of job-shop problem. On this basis, we provide its formulation as Constraint Programming while taking into account commutation between quantum operations. We show that this formulation improves the overall execution time of the resulting schedules in practice through experiments with a real quantum compiler and quantum circuits from two common benchmark sets.
Can a charged ring levitate a neutral, polarizable object? Can Earnshaw's Theorem be extended to such objects?
Creators: name: Minter, Stephen
name: Chiao, Raymond
Publisher: name: arXiv
Year: 2007
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: Stable electrostatic levitation and trapping of a neutral, polarizable object by a charged ring is shown to be theoretically impossible. Earnshaw's Theorem precludes the existence of such a stable, neutral particle trap.
description: 11 pages, 1 figure
Anteil Verlage 2016-2021. Bibliothek Leibniz-Zentrum für Agrarlandschaftsforschung (ZALF) e. V.
Creators: name: Dalchow, Claus
Publisher: name: Zenodo
Year: 2021
Subjects: DEAL
Bibliotheken
OA-Transformation
Transformationsverträge

description: Kritische Betrachtungen der Auswirkungen von DEAL am Beispiel der Bibliothek Leibniz-Zentrum für Agrarlandschaftsforschung (ZALF) e. V. Vortrag in der Reihe Quo vadis offene Wissenschaft. Eine virtuelle Open Access Woche für Berlin-Brandenburg, am 7.12.2021.
Dorylaimus monohystera DE MAN II. Lesenceistvand
Creators: name: Árpád, Soós
Publisher: name: Zenodo
Year: 1940
Subjects: Biodiversity
Taxonomy
Animalia
Nematoda
Chromadorea
Rhabditida
Criconematidae
Dorylaimus
Dorylaimus monohystera

description: 23. monohystera DE MAN—
II. Lesenceistvánd (27).
description: Published as part of Árpád, Soós, 1940, Magyarország szabadon élő fonalférgeinek jegyzéke, pp. 79-97 in Annales historico-naturales Musei nationalis hungarici 33 on page 85, DOI: 10.5281/zenodo.10838638
Habitat associations of wood frogs (Rana sylvatica), and effects of fragmentation, in boreal mixedwood forests
Creators: name: Wind, Elke
Publisher: name: University of British Columbia
Year: 2009

description: I studied the habitat associations of wood frogs (Rana sylvatica) and fragmentation in boreal mixedwood forests of north-central Alberta. I sampled wood frogs, measured habitat characteristics, and assessed the general wetness of 10 sites from 1993 to 1995. The 10 sampling sites were in continuous forest in 1993, but through forest harvesting, six of these sites were made isolated fragments surrounded by 200-m wide clear cuts in 1994. The abundance of wood frogs decreased and average body length increased within 10-ha fragments two years post-harvesting compared to 100-ha and control sites. Forest fragmentation reduces the number of wood frogs, especially impacting small individuals, but the presence of wet patches within a site may mitigate the effects. Analyses of habitat indicate that wood frogs are associated with some characteristics of boreal mixedwood forests, perhaps most closely related to coarse woody material (CWM) approximately 5<11 cm in diameter. CWM of this size class is correlated with trembling aspen {Populus tremuloides) that is 23<38 cm diameter at breast height (dbh). I recommend further research into the effects of timber harvesting on migration and dispersal of amphibians, and for determining habitat requirements of amphibians at stand and landscape levels in boreal mixedwood forests.
Potassium-Doped Para-Terphenyl: Structure, Electrical Transport Properties and Possible Signatures of a Superconducting Transition
Creators: name: Pinto, N.
name: Di Nicola, C.
name: Trapananti, A.
name: Minicucci, M.
name: Di Cicco, A.
name: Marcelli, A.
name: Bianconi, A.
name: Marchetti, F.
name: Pettinari, C.
name: Perali, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Preliminary evidence for the occurrence of high-Tc superconductivity in alkali-doped organic materials, such as potassium-doped p-terphenyl (KPT), were recently obtained by magnetic susceptibility measurements and by the opening of a large superconducting gap as measured by ARPES and STM techniques. In this work, KPT samples have been synthesized by a chemical method and characterized by low-temperature Raman scattering and resistivity measurements. Here, we report the occurrence of a resistivity drop of more than 4 orders of magnitude at low temperatures in KPT samples in the form of compressed powder. This fact was interpreted as a possible sign of a broad superconducting transition taking place below 90 K in granular KPT. The granular nature of the KPT system appears to be also related to the 20 K broadening of the resistivity drop around the critical temperature.
description: 9 pages, 6 figures
Dorylaimus paraobtusicaudatus MICOLETZKY —
Creators: name: Árpád, Soós
Publisher: name: Zenodo
Year: 1940
Subjects: Biodiversity
Taxonomy
Animalia
Nematoda
Chromadorea
Rhabditida
Criconematidae
Dorylaimus
Dorylaimus paraobtusicaudatus

description: 25. paraobtusicaudatus MICOLETZKY—
III. Garamberzence (23).
description: Published as part of Árpád, Soós, 1940, Magyarország szabadon élő fonalférgeinek jegyzéke, pp. 79-97 in Annales historico-naturales Musei nationalis hungarici 33 on page 85, DOI: 10.5281/zenodo.10838638
Electrical and thermal transport properties of kagome metals AV$_3$Sb$_5$ (A=K, Rb, Cs)
Creators: name: Mi, Xinrun
name: Yang, Kunya
name: Gan, Yuhan
name: Zhang, Long
name: Wang, Aifeng
name: Chai, Yisheng
name: Zhou, Xiaoyuan
name: He, Mingquan
Publisher: name: arXiv
Year: 2024
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The interplay between lattice geometry, band topology and electronic correlations in the newly discovered kagome compounds AV$_3$Sb$_5$ (A=K, Rb, Cs) makes this family a novel playground to investigate emergent quantum phenomena, such as unconventional superconductivity, chiral charge density wave and electronic nematicity. These exotic quantum phases naturally leave nontrivial fingerprints in transport properties of AV$_3$Sb$_5$, both in electrical and thermal channels, which are prominent probes to uncover the underlying mechanisms. In this brief review, we highlight the unusual electrical and thermal transport properties observed in the unconventional charge ordered state of AV3Sb5, including giant anomalous Hall, anomalous Nernst, ambipolar Nernst and anomalous thermal Hall effects. Connections of these anomalous transport properties to time-reversal symmetry breaking, topological and multiband fermiology, as well as electronic nematicity, are also discussed. Finally, a perspective together with challenges of this rapid growing field are given.
description: 34 pages,9 figures,an review article published in Tungsten 5,300(2023)
Interaction of void spacing and material size effect on inter-void flow localisation
Creators: name: Holte, I.
name: Srivastava, A.
name: Martínez-Pañeda, E.
name: Niordson, C. F.
name: Nielsen, K. L.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: The ductile fracture process in porous metals due to growth and coalescence of micron scale voids is not only affected by the imposed stress state but also by the distribution of the voids and the material size effect. The objective of this work is to understand the interaction of the inter-void spacing (or ligaments) and the resultant gradient induced material size effect on void coalescence for a range of imposed stress states. To this end, three dimensional finite element calculations of unit cell models with a discrete void embedded in a strain gradient enhanced material matrix are performed. The calculations are carried out for a range of initial inter-void ligament sizes and imposed stress states characterised by fixed values of the stress triaxiality and the Lode parameter. Our results show that in the absence of strain gradient effects on the material response, decreasing the inter-void ligament size results in an increase in the propensity for void coalescence. However, in a strain gradient enhanced material matrix, the strain gradients harden the material in the inter-void ligament and decrease the effect of inter-void ligament size on the propensity for void coalescence.
Dorylaimus parvus DE MAN II. Csopak
Creators: name: Árpád, Soós
Publisher: name: Zenodo
Year: 1940
Subjects: Biodiversity
Taxonomy
Animalia
Nematoda
Chromadorea
Rhabditida
Criconematidae
Dorylaimus
Dorylaimus parvus

description: 26. parvus DE MAN—
II. Csopak (23), Tihany (22, 23); V Radnai-havasok [Ünőkő] (18).
description: Published as part of Árpád, Soós, 1940, Magyarország szabadon élő fonalférgeinek jegyzéke, pp. 79-97 in Annales historico-naturales Musei nationalis hungarici 33 on page 85, DOI: 10.5281/zenodo.10838638
DEAL aus Sicht der HAW
Creators: name: Ilg, Karin
Publisher: name: Zenodo
Year: 2021
Subjects: DEAL
Bibliotheken
OA-Transformation
Transformationsverträge

description: Kritische Betrachtungen der Auswirkungen von DEAL am Beispiel der Hochschulbibliothek FH Bielefeld University of Applied Science. Vortrag in der Reihe Quo vadis offene Wissenschaft. Eine virtuelle Open Access Woche für Berlin-Brandenburg, am 7.12.2021.
A precise calculation of the fundamental string tension in SU(N) gauge theories in 2+1 dimensions
Creators: name: Bringoltz, Barak
name: Teper, Michael
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We use lattice techniques to calculate the continuum string tensions of SU(N) gauge theories in 2+1 dimensions. We attempt to control all systematic errors at a level that allows us to perform a precise test of the analytic prediction of Karabali, Kim and Nair. We find that their prediction is within 3% of our values for all N and that the discrepancy decreases with increasing N. When we extrapolate our results to N=oo we find that there remains a discrepancy of ~ 1%, which is a convincing ~6 sigma effect. Thus, while the Karabali-Nair analysis is remarkably accurate at N=oo, it is not exact.
description: 10 pages, 2 figures