cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Spin-orbit torque in MgO/CoFeB/Ta/CoFeB/MgO symmetric structure with interlayer antiferromagnetic coupling
Creators: name: Shi, G. Y.
name: Wan, C. H.
name: Chang, Y. S.
name: Li, F.
name: Zhou, X. J.
name: Zhang, P. X.
name: Cai, J. W.
name: Han, X. F.
name: Pan, F.
name: Song, C.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Spin current generated by spin Hall effect in the heavy metal would diffuse up and down to adjacent ferromagnetic layers and exert torque on their magnetization, called spin-orbit torque. Antiferromagnetically coupled trilayers, namely the so-called synthetic antiferromagnets (SAF), are usually employed to serve as the pinned layer of spintronic devices based on spin valves and magnetic tunnel junctions to reduce the stray field and/or increase the pinning field. Here we investigate the spin-orbit torque in MgO/CoFeB/Ta/CoFeB/MgO perpendicularly magnetized multilayer with interlayer antiferromagnetic coupling. It is found that the magnetization of two CoFeB layers can be switched between two antiparallel states simultaneously. This observation is replicated by the theoretical calculations by solving Stoner-Wohlfarth model and Landau-Lifshitz-Gilbert equation. Our findings combine spin-orbit torque and interlayer coupling, which might advance the magnetic memories with low stray field and low power consumption.
description: 21 pages, 4 figures, Accepted by Phys. Rev. B
Predicting space-charge affected field emission current from curved tips
Creators: name: Biswas, Debabrata
name: Kumar, Raghwendra
name: Singh, Gaurav
Publisher: name: arXiv
Year: 2021
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: Applied Physics (physics.app-ph)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Field emission studies incorporating the effect of space charge reveal that for planar emitters, the steady-state field $E_P$, after initial transients, settles down to a value lower than the vacuum field $E_L$. The ratio $\vartheta = E_P/E_L$ is a measure of the severity of space charge effect with $\vartheta = 0$ being most severe and $\vartheta \simeq 1$ denoting the lack of significant effect. While, $E_L$ can be determined from a single numerical evaluation of the Laplace equation, $E_P$ is largely an unknown quantity whose value can be approximately found using physical models or can be determined `exactly' by particle-in-cell or molecular dynamics codes. We propose here a simple model that applies to planar as well as curved emitters based on an application of Gauss's law. The model is then refined using simple approximations for the magnitude of the anode field and the spread of the beam when it reaches the anode. The predictions are compared with existing molecular dynamics results for the planar case and particle-in-cell simulation results using PASUPAT for curved emitters. In both cases, the agreement is good. The method may also be applied to large area field emitters if the individual enhancement factors are known, for instance, using the hybrid model (D.Biswas, J. Vac. Sci. Technol. B 38, 063201 (2020)).
description: 10 pages, 13 figures
Differentiation of Genus 3 Hyperelliptic Functions
Creators: name: Bunkova, Elena Yu.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Complex Variables (math.CV)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: In this work we give an explicit solution to the problem of differentiation of hyperelliptic functions in genus $3$ case. It is a genus $3$ analogue of the result of F. G. Frobenius and L. Stickelberger. Our method is based on the series of works by V. M. Buchstaber, D. V. Leikin and V. Z. Enolskii. We describe a polynomial map $p\colon \mathbb{C}^{3g} \to \mathbb{C}^{2g}$. For $g = 1,2,3$ we describe $3g$ polynomial vector fields in $\mathbb{C}^{3g}$ projectable for $p$ and their polynomial Lie algebras. We obtain the corresponding derivations of the field of hyperelliptic functions.
description: 15 pages
Controllability of a 2x2 parabolic system by one force with a space-dependent coupling term of order one
Creators: name: Duprez, Michel
Publisher: name: arXiv
Year: 2017
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 93B05, 93B07

description: This paper is devoted to the controllability of linear systems of two coupled parabolic equations when the coupling involves a space dependent first order term. This system is set on an bounded interval, and the first equation is controlled by a force supported in a subinterval of I or on the boundary. In the case where the intersection of the coupling and control domains is nonempty, we prove null controllability at any time. Otherwise, we provide a minimal time for null controllability. Finally we give a necessary and sufficient condition for the approximate controllability. The main technical tool for obtaining these results is the moment method
description: Accepted
Automated detection of COVID-19 cases from chest X-ray images using deep neural network and XGBoost
Creators: name: Nasiri, Hamid
name: Hasani, Sharif
Publisher: name: arXiv
Year: 2021
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: In late 2019 and after COVID-19 pandemic in the world, many researchers and scholars have tried to provide methods for detection of COVID-19 cases. Accordingly, this study focused on identifying COVID-19 cases from chest X-ray images. In this paper, a novel approach to diagnosing coronavirus disease from X-ray images was proposed. In the proposed method, DenseNet169 deep neural network was used to extract the features of X-ray images taken from the patients' chest and the extracted features were then given as input to the Extreme Gradient Boosting (XGBoost) algorithm so that it could perform the classification task. Evaluation of the proposed approach and its comparison with the methods presented in recent years revealed that the proposed method was more accurate and faster than the existing ones and had an acceptable performance in detection of COVID-19 cases from X-ray images.
description: Radiography, 2022
Generating Galaxy Clusters Mass Density Maps from Mock Multiview Images via Deep Learning
Creators: name: de Andres, Daniel
name: Cui, Weiguang
name: Yepes, Gustavo
name: De Petris, Marco
name: Aversano, Gianmarco
name: Ferragamo, Antonio
name: De Luca, Federico
name: Muñoz, A. Jiménez
Publisher: name: arXiv
Year: 2024
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Galaxy clusters are composed of dark matter, gas and stars. Their dark matter component, which amounts to around 80\% of the total mass, cannot be directly observed but traced by the distribution of diffused gas and galaxy members. In this work, we aim to infer the cluster's projected total mass distribution from mock observational data, i.e. stars, Sunyaev-Zeldovich, and X-ray, by training deep learning models. To this end, we have created a multiview images dataset from {\sc{The Three Hundred}} simulation that is optimal for training Machine Learning models. We further study deep learning architectures based on the U-Net to account for single-input and multi-input models. We show that the predicted mass distribution agrees well with the true one.
description: To appear in Proc. of the mm Universe 2023 conference, Grenoble (France), June 2023, published by F. Mayet et al. (Eds), EPJ Web of conferences, EDP Sciences
MPEC 2024-N112 : 2024 NP2
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 NP2

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Mini symposium: Integrating machine learning and multiscale modeling – advances, challenges and future possibilities
Creators: name: Geroski, Tijana
name: Filipovic, Nenad
Publisher: name: Zenodo
Year: 2023

description: Mini symposium: Integrating machine learning and multiscale modeling – advances, challenges and future possibilities, held at the X International Conference on Computational Bioengineering (ICCB 2023), September 20-23, Vienna, Austria, 2023
Analyzing Web Archives Through Topic and Event Focused Sub-collections
Creators: name: Gossen, Gerhard
name: Demidova, Elena
name: Risse, Thomas
Publisher: name: arXiv
Year: 2016
Subjects: subject: Digital Libraries (cs.DL)
subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: Web archives capture the history of the Web and are therefore an important source to study how societal developments have been reflected on the Web. However, the large size of Web archives and their temporal nature pose many challenges to researchers interested in working with these collections. In this work, we describe the challenges of working with Web archives and propose the research methodology of extracting and studying sub-collections of the archive focused on specific topics and events. We discuss the opportunities and challenges of this approach and suggest a framework for creating sub-collections.
description: Published in the proceedings of the 8th ACM Conference on Web Science 2016
An approach to 1000 T using the Electro-Magnetic Flux Compression
Creators: name: Nakamura, Daisuke
name: Sawabe, Hironobu
name: Takeyama, Shojiro
Publisher: name: arXiv
Year: 2017
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: An ultra-high magnetic field was generated by the electro-magnetic flux compression technique under a reduced seed magnetic field condition and achieved maximum magnetic field intensity was investigated. An ordinal pickup coil measurement fails due to the dielectric breakdown at around 500 T. On the other hand, by utilizing the magneto-optical Faraday rotation method with a small probe, the measureable maximum magnetic field increased significantly. It was found that reduced seed field increases the maximum magnetic field, but with a reduced size of the final bore. A highest magnetic field over 763 T and possibly up to 985 T approaching 1000 T was detected.
description: 16 pages, 10 figures
Genetic Diversity of Southeast African Bantus and African Americans using the PowerPlex Y23 System
Creators: name: Benedico DP
name: Calderón S
name: Stojkovic O
name: Garcia-Bertrand R
name: Rowold DJ
name: Herrera RJ
Publisher: name: figshare
Year: 2017
Subjects: subject: 170104 Forensic Psychology
subject: FOS: Other medical sciences

description: The aim of this investigation is to determine the capacity of the newly available Y-STR multiplex system, PowerPlex® Y23, to discriminate between populations of similar ancestry, specifically of African descent. Using network analysis, the partitioning of the 23-loci haplotypes was assessed in relation to Y-specific haplogroups. In the network projection, a number of Bantu haplogroups including E1b1a1a1a-M58, B2a1a-M109 and E2b-M98 as well as non-Bantu African haplogroups such as B2b2-M115 and A1b1b2b1-M118 segregate differentially based on Y-STR haplotypes. Further, we contrast population genetics parameters of the Bantu Southeast African and African American populations. Also, the genetic distance values illustrate the robust capacity of the PowerPlex® Y23 system to discriminate among populations. Noteworthy, we demonstrate that the two populations of African ancestry are as genetically different from each other as the African American population is from the Caucasian, Hispanic and Native American groups. For the first time, allelic and genotypic frequencies for the 23 Y-STR loci included in the PowerPlex® Y23 forensic system are provided for a continental Southeast African population, the Bantu from the Maputo Province.
Probability-driven scoring functions in combining linear classifiers
Creators: name: Trajdos, Pawel
name: Burduk, Robert
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Although linear classifiers are one of the oldest methods in machine learning, they are still very popular in the machine learning community. This is due to their low computational complexity and robustness to overfitting. Consequently, linear classifiers are often used as base classifiers of multiple ensemble classification systems. This research is aimed at building a new fusion method dedicated to the ensemble of linear classifiers. The fusion scheme uses both measurement space and geometrical space. Namely, we proposed a probability-driven scoring function which shape depends on the orientation of the decision hyperplanes generated by the base classifiers. The proposed fusion method is compared with the reference method using multiple benchmark datasets taken from the KEEL repository. The comparison is done using multiple quality criteria. The statistical analysis of the obtained results is also performed. The experimental study shows that, under certain conditions, some improvement may be obtained.
The Śākta way: acknowledge the waves & the tides – Ācārya dr. Sthaneshwar Timalsina
Creators: name: Timalsina, Staneshwar
Publisher: name: Zenodo
Year: 2023
Subjects: Tantric philosophy
anava upaya
yantra
amnaya
Shiva
Shaiva
vimarsha-foundation
consciousness
mahadeva
Vasugupta
Sarvamnaya
tripura
Durga
Kaula
Abhinavagupta
Shiva Sutra
Kula
saivadvaita
vedanta
Mahakali
Tantra
Chandi
Kali
advaita vedanta
Bhairava
shambhava
timalsina
Spanda
Kashmir Shaivism
krama
Saundaryalahari
Tripura Rahasya
Tripurasundari
Camunda
agama
Devi Mahatmya
sarvamnaya
Guhyakālī
shakti
tantraloka
Divine Mother
sarvamnaya-oral-tradition-archive
trika
sthaneshwar timalsina
Īśāna
Mālinīvijayottaratantra
shakta upāya
Kubjika
Sadāśiva

description: Visit Vimarsha Foundation's website for more teachings, including FREE online courses offered by Śaivācārya Prof. Sthaneshwar Timalsina:
https://www.vimarshafoundation.org/courses

Join our Community on Facebook to discuss these topics and stay connected:
https://www.facebook.com/groups/vimarshafoundation/

Excerpt from Spanda Talk Part 1 ÷ https://www.youtube.com/watch?v=NFWxEY6WrBc&t=10s

Original YouTube video: https://www.youtube.com/watch?v=hTbWNw3rzxQ

This presentation is part of the Sarvāmnāya Oral Tradition Archive.
Vimarsha Foundation. (2025). The Sarvāmnāya Oral Tradition Archive [Data set]. Zenodo. https://doi.org/10.5281/zenodo.15188107
Interpretable Directed Diversity: Leveraging Model Explanations for Iterative Crowd Ideation
Creators: name: Wang, Yunlong
name: Venkatesh, Priyadarshini
name: Lim, Brian Y.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Feedback in creativity support tools can help crowdworkers to improve their ideations. However, current feedback methods require human assessment from facilitators or peers. This is not scalable to large crowds. We propose Interpretable Directed Diversity to automatically predict ideation quality and diversity scores, and provide AI explanations - Attribution, Contrastive Attribution, and Counterfactual Suggestions - to feedback on why ideations were scored (low), and how to get higher scores. These explanations provide multi-faceted feedback as users iteratively improve their ideations. We conducted formative and controlled user studies to understand the usage and usefulness of explanations to improve ideation diversity and quality. Users appreciated that explanation feedback helped focus their efforts and provided directions for improvement. This resulted in explanations improving diversity compared to no feedback or feedback with scores only. Hence, our approach opens opportunities for explainable AI towards scalable and rich feedback for iterative crowd ideation and creativity support tools.
MeerLIRGs: A MeerKAT 1.28 GHz study of local Luminous Infrared galaxies in the southern hemisphere
Creators: name: Moloko, Malebo
Publisher: name: Zenodo
Year: 2024

description: Luminous Infrared galaxies (LIRGs) are rare in the local universe but play a crucial role in our understanding of galaxy evolution, as they account for over 50% of the cosmic-infrared background and most of the stars formed at z>1. They are often associated with interacting and merging systems, whose complexity requires high spatial imaging to disentangle Star Formation (SF) and any Active Galactic Nuclei (AGN) that may be hidden in their dusty shrouds. Infrared Astronomical Satellite (IRAS; Neugebauer 1984) observations revealed the existence of numerous galaxies that emit the bulk of their energy in the infrared regime, with LIRGs being one of the most powerful (L_IR>1011 L_sun) populations. There is a tight correlation observed between the infrared and radio continuum of star-forming galaxies which makes the MeerKAT L-band observations an excellent complimentary tracer of SF and delineator of AGN. In this work, we study the properties of 298 galaxies with S > 5.24 Jy selected from the IRAS Revised Bright Galaxy Sample (RBGS; Sanders 2003) located in the southern hemisphere, observed with MeerKAT at 1.28 GHz using the L-band; dubbed as the "MeerLIRGs''. The MeerKAT snapshots have a 7.5" FHWM resolution and sensitivity of sigma ~ 20 uJy/beam. We obtain the activity type classification from the literature and classify them based on their mid-infrared WISE colours; then study their properties. We further compare our results with those of galaxies drawn from the same sample but observed with the VLA (by Condon (1990, 1996 and 1998) and are located in the northern hemisphere. A combination of this MeerKAT data and the above-mentioned VLA catalogues encompass the full radio catalogue of the RBGS sample. Thus in my contribution, I will present this sample's Infrared and radio correlation, the global properties of our galaxies and the entire associated radio catalogue of the RBGS.
Designing Optimal Recommended Budgeting Thresholds for a Medicaid Program
Creators: name: Henderson, Morgan
name: Stockwell, Ian
Publisher: name: AJMC
Year: 2022
Subjects: Medicaid program
Administrative efficiency
Automatic auditing thresholds

description: Objectives: To develop and test a methodology for optimally setting automatic auditing thresholds to minimize administrative costs without encouraging overall budget growth in a state Medicaid program. Study Design: Two-stage optimization using administrative Maryland Medicaid plan-of-service data from fiscal year (FY) 2019. Methods: In the first stage, we use an unsupervised machine learning method to regroup acuity levels so that plans of service with similar spending profiles are grouped together. Then, using these regroupings, we employ numerical optimization to estimate the recommended budget levels that could minimize the number of audits across those groupings. We simulate the effects of this proposed methodology on FY 2019 plans of service and compare the resulting number of simulated audits with actual experience. Results: Using optimal regrouping and numerical optimization, this method could reduce the number of audits by 10.4% to 36.7% relative to the status quo, depending on the search space parameters. This reduction is a result of resetting recommended budget levels across acuity groupings, with no anticipated increase in the total recommended budget amount across plans of service. These reductions are driven, in general, by an increase in recommended budget level for acuity groupings with low variance in plan-of-service spending and a reduction in recommended budget level for acuity groupings with high variance in plan-of-service spending. Conclusions: Using machine learning and optimization methods, it is possible to design recommended budget thresholds that could lead to significant reductions in administrative burden without encouraging overall cost growth.
A Formulation of Consistent Particle Hydrodynamics in Strong Form
Creators: name: Yamamoto, Satoko
name: Makino, Junichiro
Publisher: name: arXiv
Year: 2017
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: In fluid dynamical simulations in astrophysics, large deformations are common and surface tracking is sometimes necessary. Smoothed Particle Hydrodynamics (SPH) method has been used in many of such simulations. Recently, however, it has been shown that SPH cannot handle contact discontinuities or free surfaces accurately. There are several reasons for this problem. The first one is that SPH requires that the density is continuous and differentiable. The second one is that SPH does not have the consistency, and thus the accuracy is zeroth order in space. In addition, we cannot express accurate boundary conditions with SPH. In this paper, we propose a novel, high-order scheme for particle-based hydrodynamics of compress- ible fluid. Our method is based on kernel-weighted high-order fitting polynomial for intensive variables. With this approach, we can construct a scheme which solves all of the three prob- lems described above. For shock capturing, we use a tensor form of von-Neumann-Richtmyer artificial viscosity. We have applied our method to many test problems and obtained excel- lent result. Our method is not conservative, since particles do not have mass or energy, but only their densities. However, because of the Lagrangian nature of our scheme, the violation of the conservation laws turned out to be small. We name this method Consistent Particle Hydrodynamics in Strong Form (CPHSF).
description: 42 pages, 34figures
Multidimensional Transonic Shock Waves and Free Boundary Problems
Creators: name: Chen, Gui-Qiang G.
name: Feldman, Mikhail
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 35Q31, 35M10, 35M12, 35R35, 35L65, 35B30, 35B40, 35D30, 35B65, 35J70, 76H05, 35L67, 35B45, 35B35, 35B36, 35L20, 35J67, 76N10, 76L05, 76N20, 76G25

description: We are concerned with free boundary problems arising from the analysis of multidimensional transonic shock waves for the Euler equations in compressible fluid dynamics. In this expository paper, we survey some recent developments in the analysis of multidimensional transonic shock waves and corresponding free boundary problems for the compressible Euler equations and related nonlinear partial differential equations (PDEs) of mixed type. The nonlinear PDEs under our analysis include the steady Euler equations for potential flow, the steady full Euler equations, the unsteady Euler equations for potential flow, and related nonlinear PDEs of mixed elliptic-hyperbolic type. The transonic shock problems include the problem of steady transonic flow past solid wedges, the von Neumann problem for shock reflection-diffraction, and the Prandtl-Meyer problem for unsteady supersonic flow onto solid wedges. We first show how these longstanding multidimensional transonic shock problems can be formulated as free boundary problems for the compressible Euler equations and related nonlinear PDEs of mixed type. Then we present an effective nonlinear method and related ideas and techniques to solve these free boundary problems. The method, ideas, and techniques should be useful to analyze other longstanding and newly emerging free boundary problems for nonlinear PDEs.
description: 61 pages, 9 figures
Topological phases of matter with disorder and quasiperiodicity
Creators: name: Fu, Yixing
Publisher: name: No Publisher Supplied
Year: 2022

description: The topological materials have been theoretically and experimentally studied intensively in the past decades. The topological properties’ robustness against distortion makes them a natural playground to explore novel phase transitions. In this thesis, we focus on topological insulators and semimetals to study the phase transitions driven by disorder and quasiperiodicity. The main focus of this thesis is on the non-perturbative effects that demand the application of state-of-the-art numerical methods.We first consider models of semimetals under quasiperiodic modulation. We show that the non-perturbative incommensurate effect can drive semimetals through a quantum phase transition into a diffusive phase. Such phase transition will be referred to as the “magic-angle” effect, which will be interpreted to be central behind the magic-angle twisted bilayer graphene. The phase transition is shown to present universally in many models of semimetals. Meanwhile, the transitions have different characters based on the symmetry, in a way analogous to but fundamentally different from the 10-fold classification of Anderson transition.On top of quasiperiodicity, we study the effect of adding disorder to models of “magic-angle” semimetals. For both the experimentally realized twisted bilayer graphene and the simpler models that emulate the same universal physics, we analyze a special type of disorder that is native to the physics of quasiperiodicity - the inhomogeneity of the modulation. Such disorder effects correspond to the varying twist angle in twisted bilayer graphene which has significant experimental relevance.We then naturally generalize the considerations of semimetal to a 2D topological insulator. The topological mass intertwines with the strength of quasiperiodicity to create a fascinatingly rich phase diagram with interesting eigenstate criticality. In such criticality, we captured topological flat bands, which are of interest because of the potential to host strongly correlated topological phases.Lastly, we study the effect of disorder in the 3D topological insulator. We revisit the question of the stability of the semimetal line as a phase boundary between topological insulator phases. Because of the rare-region effect that is strictly non-perturbative, we find the semimetal line is destabilized which prevents the occurrence of a quantum critical point.
Measurement-induced phase transitions in sparse nonlocal scramblers
Creators: name: Hashizume, Tomohiro
name: Bentsen, Gregory
name: Daley, Andrew J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Measurement-induced phase transitions arise due to a competition between the scrambling of quantum information in a many-body system and local measurements. In this work we investigate these transitions in different classes of fast scramblers, systems that scramble quantum information as quickly as is conjectured to be possible -- on a timescale proportional to the logarithm of the system size. In particular, we consider sets of deterministic sparse couplings that naturally interpolate between local circuits that slowly scramble information and highly nonlocal circuits that achieve the fast-scrambling limit. We find that circuits featuring sparse nonlocal interactions are able to withstand substantially higher rates of local measurement than circuits with only local interactions, even at comparable gate depths. We also study the quantum error-correcting codes that support the volume-law entangled phase and find that our maximally nonlocal circuits yield codes with nearly extensive contiguous code distance. Use of these sparse, deterministic circuits opens pathways towards the design of noise-resilient quantum circuits and error correcting codes in current and future quantum devices with minimum gate numbers.
description: 11 pages, 6 figures (plus 11 page supplement with 11 figures)
Closed-form solutions for the inverse kinematics of serial robots using conformal geometric algebra
Creators: name: Zaplana, Isiah
name: Hadfield, Hugo
name: Lasenby, Joan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Robotics (cs.RO)
subject: Computational Geometry (cs.CG)
subject: FOS: Computer and information sciences
subject: 70B15, 70B15, 15A66, 15A67

description: This work addresses the inverse kinematics of serial robots using conformal geometric algebra. Classical approaches include either the use of homogeneous matrices, which entails high computational cost and execution time or the development of particular geometric strategies that cannot be generalized to arbitrary serial robots. In this work, we present a compact, elegant and intuitive formulation of robot kinematics based on conformal geometric algebra that provides a suitable framework for the closed-form resolution of the inverse kinematic problem for manipulators with a spherical wrist. For serial robots of this kind, the inverse kinematics problem can be split in two subproblems: the position and orientation problems. The latter is solved by appropriately splitting the rotor that defines the target orientation into three simpler rotors, while the former is solved by developing a geometric strategy for each combination of prismatic and revolute joints that forms the position part of the robot. Finally, the inverse kinematics of 7 DoF redundant manipulators with a spherical wrist is solved by extending the geometric solutions obtained in the non-redundant case.
description: 33 pages, 10 figures
Geometric optimization of non-equilibrium adiabatic thermal machines and implementation in a qubit system
Creators: name: Alonso, Pablo Terren
name: Abiuso, Paolo
name: Perarnau-Llobet, Marti
name: Arrachea, Liliana
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We adopt a geometric approach to describe the performance of adiabatic quantum machines, operating under slow time-dependent driving and in contact to two or more reservoirs with a temperature bias during all the cycle. We show that the problem of optimizing the power generation of a heat engine and the efficiency of both the heat engine and refrigerator operational modes is reduced to an isoperimetric problem with non-trivial underlying metrics and curvature. This corresponds to the maximization of the ratio between the area enclosed by a closed curve and its corresponding length. We illustrate this procedure in a qubit coupled to two reservoirs operating as a thermal machine by means of an adiabatic protocol.
description: 16 pages, 11 figures
EdgePier: P2P-based Container Image Distribution in Edge Computing Environments
Creators: name: Becker, Soeren
name: Schmidt, Florian
name: Kao, Odej
Publisher: name: arXiv
Year: 2021
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: Edge and fog computing architectures utilize container technologies in order to offer a lightweight application deployment. Container images are stored in registry services and operated by orchestration platforms to download and start the respective applications on nodes of the infrastructure. During large application rollouts, the connection to the registry is prone to become a bottleneck, which results in longer provisioning times and deployment latencies. Previous work has mainly addressed this problem by proposing scalable registries, leveraging the BitTorrent protocol or distributed storage to host container images. However, for lightweight and dynamic edge environments the overhead of several dedicated components is not feasible in regard to its interference of the actual workload and is subject to failures due to the introduced complexity. In this paper we introduce a fully decentralized container registry called EdgePier, that can be deployed across edge sites and is able to decrease container deployment times by utilizing peer-to-peer connections between participating nodes. Image layers are shared without the need for further centralized orchestration entities. The conducted evaluation shows that the provisioning times are improved by up to 65% in comparison to a baseline registry, even with limited bandwidth to the cloud.
description: 40th IEEE International Performance Computing and Communications Conference 2021
Quasi-Periodicities at Year Time Scales in Blazars
Creators: name: Covino, Stefano
name: Sandrinelli, Angela
name: Treves, Aldo
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We examine the 2008-2016 gamma-ray and optical light curves of a number of bright Fermi blazars. In a fraction of them, the periodograms show possible evidence of quasi-periodicities related in the two bands. This coincidence strengthens their physical meaning. Comparing with results from the periodicity search of quasars, the presence of quasi-periodicities in blazars suggests that the basic condition for its observability is related to the relativistic jet in the observer direction, but the overall picture remains uncertain.
description: 4 pages, 3 figures, in press, New Frontiers in Black Hole Astrophysics. Proceedings IAU Symposium No 324, 2017. Andreja Gomboc and Carole Mundell, eds
New techniques to facilitate longitudinal video-based digital tracking of infant development
Creators: name: Rai, Richa
Publisher: name: No Publisher Supplied
Year: 2022

description: In the last few decades, the rate of neurodevelopmental disorders has increased. However, current criteria to detect developmental differences rely on social and emotional parameters determined by observation alone. This reliance on observation restricts the description of movements to those that are less ambiguous, thus leaving out important components of the continuous stream of motions that make up natural behaviors. Movements that occur spontaneously and lend fluidity to social behavior occur largely beneath awareness and escape the naked eye of the observer. Furthermore, they are present since birth, unlike the more reliable social movements that appear later in life, when an infant’s motor system has matured. We here take the approach of examining movements since birth and tracking their maturation, to determine natural ranges of typical neurodevelopment. We leverage off-the-shelf technology and new advances in computer vision to bring the parents into the research loop, empowering them as active contributors to cognitive developmental research. Two families submitted weekly videos of their infants starting at the age of 10 days, and continuing for 17 weeks, both infants comprise a longitudinal data set tracking the infants over the first 17 weeks. In addition, videos of infants were acquired from open access sources, which when combined with the longitudinal set, comprise a cross-sectional dataset. The videos were processed through OpenPose, and using these videos, we develop proof of concept that simple video-based assessment is possible from the comfort of the home. This new model can provide both longitudinal and cross-sectional data, to shed light on the evolution, since birth, of basic building blocks that will make up social motor behavior, possibly including atypical patterns detectable years later. Our work introduces new methods of data acquisition and analysis that can advance the study of neuromotor control in neonates and provide the means for much earlier detection of neurodevelopmental derail.
Arithmetic Statistics and noncommutative Iwasawa Theory
Creators: name: Kundu, Debanjana
name: Lei, Antonio
name: Ray, Anwesh
Publisher: name: arXiv
Year: 2021
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11R23, 11G05

description: Let $p$ be an odd prime. Associated to a pair $(E, \mathcal{F}_\infty)$ consisting of a rational elliptic curve $E$ and a $p$-adic Lie extension $\mathcal{F}_\infty$ of $\mathbb{Q}$, is the $p$-primary Selmer group $Sel_{p^\infty}(E/\mathcal{F}_\infty)$ of $E$ over $\mathcal{F}_\infty$. In this paper, we study the arithmetic statistics for the algebraic structure of this Selmer group. The results provide insights into the asymptotics for the growth of Mordell--Weil ranks of elliptic curves in noncommutative towers.
description: 50 pages, minor corrections
D2.1 M-Sec Use Cases Description
Creators: name: Medela, Arturo
name: Clemente, Vanessa
name: García, Tomás
name: Sotero, Sonia
name: Nakasawa, Jin
name: Doguchi, Keiko
Publisher: name: Zenodo
Year: 2020
Subjects: IoT
Security
Pilots
Use Cases
Santander
Fujisawa
Smart City

description: This document provides the initial version of M-Sec reference use cases, requirements and technical reference architecture. In detail, it presents the use cases that will be studied and implemented during the project, the requirements that stem from them, and the M-Sec technical architecture, including the binding between its logical modules and the technological assets that can be adopted for its implementation.
A New Class of Anisotropic Charged Compact Star
Creators: name: Ratanpal, B. S.
name: Bhar, Piyali
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A new model of charged compact star is reported by solving the Einstein-Maxwell field equations by choosing a suitable form of radial pressure. The model parameters $ρ$, $p_r$, $p_{\perp}$ and $E^{2}$ are in closed form and all are well behaved inside the stellar interior. A comparative study of charged and uncharged model is done with the help of graphical analysis.
description: 10 figures, 2 tables
Strong isospin breaking in Sp(4) gauge theory
Creators: name: Maas, Axel
name: Zierler, Fabian
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A hidden strongly-interacting sector is a possible candidate for dark matter. One scenario consistent with astrophysical constraints is a QCD-like theory with gauge group Sp(4) and two fundamental non-degenerate fermions. We report exploratory investigations of the light spectrum and decay constants for this theory using lattice calculations.
description: 7 pages, 3 figures, submitted to Lattice2021 proceedings and abridged version submitted to LHCP2021 proceedings
Topological transport in Dirac electronic systems: A concise review
Creators: name: Song, Hua-Ding
name: Sheng, Dian
name: Wang, An-Qi
name: Li, Jin-Guang
name: Yu, Da-Peng
name: Liao, Zhi-Min
Publisher: name: arXiv
Year: 2017
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Various novel physical properties have emerged in Dirac electronic systems, especially the topological characters protected by symmetry. Current studies on these systems have been greatly promoted by the intuitive concepts of Berry phase and Berry curvature, which provide precise definitions of the topological orders. In this topical review, transport properties of topological insulator (Bi2Se3), topological Dirac semimetal (Cd3As2) and topological insulator-graphene heterojunction are presented and discussed. Perspectives about transport properties of two-dimensional topological nontrivial systems, including topological edge transport, topological valley transport and topological Weyl semimetals, are provided.
Properties of the neutron star crust: Quantifying and correlating uncertainties with improved nuclear physics
Creators: name: Grams, G.
name: Somasundaram, R.
name: Margueron, J.
name: Reddy, S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A compressible liquid-drop model (CLDM) is used to correlate uncertainties associated with the properties of the neutron star (NS) crust with theoretical estimates of the uncertainties associated with the equation of state (EOS) of homogeneous neutron and nuclear matter. For the latter, we employ recent calculations based on Hamiltonians constructed using Chiral Effective Field theory. Fits to experimental nuclear masses are employed to constrain the CLDM further, and we find that they disfavor some of the Chiral Hamiltonians. The CLDM allows us to study the complex interplay between bulk, surface, curvature, and Coulomb contributions, and their impact on the NS crust. It also reveals how the curvature energy alters the correlation between the surface energy and the bulk symmetry energy. Our analysis quantifies how the uncertainties associated with the EOS of homogeneous matter implies significant uncertainties for the composition of the crust, its proton fraction, and the volume fraction occupied by nuclei. We find that the finite-size effects impact the crust composition, but have a negligible effect on the net isospin asymmetry of matter. The isospin asymmetry is largely determined by the bulk properties and the isospin dependence of the surface energy. The most significant uncertainties associated with matter properties in the densest regions of the crust, the precise location of the crust-core transition, are found to be strongly correlated with uncertainties associated with the Hamiltonians. By adopting a unified model to describe the crust and the core of NSs, we tighten the correlation between their global properties such as their mass-radius relationship, moment of inertia, crust thickness, and tidal deformability with uncertainties associated with the nuclear Hamiltonians.
A Parametric Investigation on the Cyclotron Maser Instability Driven by Ring-beam Electrons with Intrinsic Alfvén Waves
Creators: name: Tong, Zi-Jin
name: Wang, Chuan-Bing
name: Zhang, Pei-Jin
name: Liu, Jin
Publisher: name: arXiv
Year: 2017
Subjects: subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: The electron-cyclotron maser is a process that generates intense and coherent radio emission in plasma. In this paper, we present a comprehensive parametric investigation on the electron-cyclotron-maser instability driven by non-thermal ring-beam electrons with intrinsic Alfvén waves which pervade the solar atmosphere and interplanetary space. It is found that both forward propagating and backward propagating waves can be excited in the fast ordinary (O) and extraordinary (X) electromagnetic modes. The growth rates of X1 mode are almost always weakened by Alfvén waves. The average pitch-angle $ϕ_0$ of electrons is a key parameter for the effect of Alfvén waves on the growth rate of modes O1, O2 and X2. For a beam-dominated electron distribution ($ϕ_0 \lesssim 30^\circ$ ), the growth rates of the maser instability for O1, O2 and X2 modes are enhanced with the increase of Alfvén wave energy density. In other conditions, the growth rates of O1, O2 and X2 modes weakened with increasing Alfvén wave intensity, except that the growth of O1 mode may also be enhanced by Alfvén waves for a ring distribution. The results may be important for us in analyzing the mechanism of radio bursts with various fine structures observed in space and astrophysical plasmas.
Visualization of Latent Fingermarks using Rhodamine B: A New Method
Creators: name: Kapoor S
name: Gurvinder S. Sodhi
name: K, Sanjiv
Publisher: name: figshare
Year: 2017
Subjects: subject: 170104 Forensic Psychology
subject: FOS: Other medical sciences

description: There are various methods available for the development of latent fingerprints on different substrates. This paper presents a new powder method for the development of latent fingerprints on different porous and non porous substrates. A fluorescent small particle reagent (SPR) based on zinc carbonate hydroxide monohydrate, also called basic zinc carbonate has been formulated. The other ingredients of the formulation are Rhodamine B dye and a commercial liquid detergent. The composition develops clear, sharp and detailed fingerprints on a large number of non-porous items, after these were immersed in water up to 96 hours. The raw materials used to prepare the SPR are cost-effective and non-hazardous. The novel formulation develops prints of a better quality as compared to the conventional, molybdenum (IV) sulfide-based composition. The fluorescent nature of the reagent helps enhance weak, fragmented and chance fingerprints that are often found at crime scenes.
Impact of energetic particle orbits on long range frequency chirping of BGK modes
Creators: name: Hezaveh, H.
name: Qu, Z. S.
name: Layden, B.
name: Hole, M. J.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Long range frequency chirping of Bernstein-Greene-Kruskal modes, whose existence is determined by the fast particles, is investigated in cases where these particles do not move freely and their motion is bounded to restricted orbits. An equilibrium oscillating potential, which creates different orbit topologies of energetic particles, is included into the bump-on-tail instability problem of a plasma wave. With respect to fast particles dynamics, the extended model captures the range of particles motion (trapped/passing) with energy and thus represents a more realistic 1D picture of the long range sweeping events observed for weakly damped modes, e.g. global Alfven eigenmodes, in tokamaks. The Poisson equation is solved numerically along with bounce averaging the Vlasov equation in the adiabatic regime. We demonstrate that the shape and the saturation amplitude of the nonlinear mode structure depends not only on the amount of deviation from the initial eigenfrequency but also on the initial energy of the resonant electrons in the equilibrium potential. Similarly, the results reveal that the resonant electrons following different equilibrium orbits in the electrostatic potential lead to different rates of frequency evolution. As compared to the previous model [Breizman B.N. 2010 Nucl. Fusion 50 084014], it is shown that the frequency sweeps with lower rates. The additional physics included in the model enables a more complete 1D description of the range of phenomena observed in experiments.
description: Submitted to Nuclear Fusion 25/01/2017
Optical bandgap engineering in nonlinear silicon nitride waveguides
Creators: name: Krückel, Clemens J.
name: Fülöp, Attila
name: Ye, Zhichao
name: Andrekson, Peter A.
name: Torres-Company, Victor
Publisher: name: arXiv
Year: 2017
Subjects: subject: Optics (physics.optics)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Silicon nitride is awell-established material for photonic devices and integrated circuits. It displays a broad transparency window spanning from the visible to the mid-IR and waveguides can be manufactured with low losses. An absence of nonlinear multi-photon absorption in the erbium lightwave communications band has enabled various nonlinear optic applications in the past decade. Silicon nitride is a dielectric material whose optical and mechanical properties strongly depend on the deposition conditions. In particular, the optical bandgap can be modified with the gas flow ratio during low-pressure chemical vapor deposition (LPCVD). Here we show that this parameter can be controlled in a highly reproducible manner, providing an approach to synthesize the nonlinear Kerr coefficient of the material. This holistic empirical study provides relevant guidelines to optimize the properties of LPCVD silicon nitride waveguides for nonlinear optics applications that rely on the Kerr effect.