cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Search for massive resonances decaying into WW, WZ or ZZ bosons in proton-proton collisions at sqrt(s) = 13 TeV
Creators: name: CMS Collaboration
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A search is presented for new massive resonances decaying to WW, WZ or ZZ bosons in l nu quark anti-quark and quark anti-quark quark anti-quark final states. Results are based on data corresponding to an integrated luminosity of 2.3-2.7 inverse femtobarns recorded in proton-proton collisions at sqrt(s) = 13 TeV with the CMS detector at the LHC. Decays of spin-1 and spin-2 resonances into two vector bosons are sought in the mass range 0.6-4.0 TeV. No significant excess over the standard model background is observed. Combining the results of the l nu quark anti-quark and quark anti-quark quark anti-quark final states, cross section and mass exclusion limits are set for models that predict heavy spin-1 and spin-2 resonances. This is the first search for a narrow-width spin-2 resonance at sqrt(s) = 13 TeV.
description: Replaced with the published version. Added the journal reference and DOI. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/B2G-16-004
Simple vector bundles on a nodal Weierstrass cubic and quasi-trigonometric solutions of CYBE
Creators: name: Burban, Igor
name: Galinat, Lennart
name: Stolin, Alexander
Publisher: name: arXiv
Year: 2017
Subjects: subject: Algebraic Geometry (math.AG)
subject: Mathematical Physics (math-ph)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: In this paper we study the combinatorics of quasi-trigonometric solutions of the classical Yang-Baxter equation, arising from simple vector bundles on a nodal Weierstrass cubic.
description: Dedicated to the memory of Petr Kulish; to appear in Journal of Physics A: Mathematical and Theoretical
Bshennaty et al - Understanding the role of LAA.pdf
Creators: name: Bshennaty, Ahmad
name: Vogl, Brennan
name: Bavo, Alessandra Maria
name: Sularz, Agata
name: Kramer, Anders Dahl
name: Jia, Yuheng
name: Beule, Matthieu De
name: Nielsen-Kudsk, Jens Erik
name: De Backer, Ole
name: Alkhouli, Mohamad
name: Hatoum, Hoda
Publisher: name: Health Research Alliance
Year: 2024
Subjects: classificationCode: 400303
subject: Biomechanical engineering

description: Background: The exclusion/occlusion of the left atrial appendage (LAA) is a treatment option for atrial fibrillation (AF) patients who are at high risk of stroke and high risk of bleeding. As the role of the LAA is not well understood or explored, this study aims to assess its role on flow dynamics in the left atrium.
Methods: Computational fluid dynamics (CFD) simulations were carried out for nine AF patients before and after LAA exclusion. The flow parameters investigated
included the LA velocities, Time Averaged Wall Shear Stress (TAWSS), Oscillatory Shear Index (OSI), Relative Residence Time (RRT), and Pressure in the LA.
Results: This study shows that, on average, a decrease in TAWSS (1.82 ± 1.85 Pa to 1.27 ± 0.96 Pa, p < 0.05) and a slight increase in OSI (0.16 ± 0.10 to 0.17 ± 0.10,
p < 0.05), RRT (1.87 ± 1.84 Pa−1 to 2.11 ± 1.78 Pa−1, p < 0.05), and pressure (−19.2 ± 6.8 mmHg to −15.3 ± 8.3 mmHg, p < 0.05) were observed in the LA after the
exclusion of the LAA, with a decrease in low‐magnitude velocities.
Conclusion: The exclusion of the LAA seems to be associated with changes in LA flow dynamics. Further studies are needed to elucidate the clinical implications of
these changes.
Proton-induced halo formation in charged meteors
Creators: name: Šiljić, Ante
name: Lunić, Frane
name: Teklić, Jurica
name: Vinković, Dejan
Publisher: name: arXiv
Year: 2017
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Despite a very long history of meteor science, our understanding of meteor ablation and its shocked plasma physics is still far from satisfactory as we are still missing the microphysics of meteor shock formation and its plasma dynamics. Here we argue that electrons and ions in the meteor plasma above $\sim$100 km altitude undergo spatial separation due to electrons being trapped by gyration in the Earth's magnetic field, while the ions are carried by the meteor as their dynamics is dictated by collisions. This separation process charges the meteor and creates a strong local electric field. We show how acceleration of protons in this field leads to the collisional excitation of ionospheric N$_2$ on the scale of many 100 m. This mechanism explains the puzzling large halo detected around Leonid meteors, while it also fits into the theoretical expectations of several other unexplained meteor related phenomena. We expect our work to lead to more advanced models of meteor-ionosphere interaction, combined with the electrodynamics of meteor trail evolution.
description: Submitted to MNRAS. The initial version of this manuscript was submitted to Nature Astronomy on August 1, 2016, a revised version submitted on January 3, 2017, and finally rejected on March 15, 2017
Strong Algorithmic Cooling in Large Star-Topology Quantum Registers
Creators: name: Pande, Varad R.
name: Bhole, Gaurav
name: Khurana, Deepak
name: Mahesh, T. S.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Cooling the qubit into a pure initial state is crucial for realizing fault-tolerant quantum information processing. Here we envisage a star-topology arrangement of reset and computation qubits for this purpose. The reset qubits cool or purify the computation qubit by transferring its entropy to a heat-bath with the help of a heat-bath algorithmic cooling procedure. By combining standard NMR methods with powerful quantum control techniques, we cool central qubits of two large star topology systems, with 13 and 37 spins respectively. We obtain polarization enhancements by a factor of over 24, and an associated reduction in the spin temperature from 298 K down to 12 K. Exploiting the enhanced polarization of computation qubit, we prepare combination-coherences of orders up to 15. By benchmarking the decay of these coherences we investigate the underlying noise process. Further, we also cool a pair of computation qubits and subsequently prepare them in an effective pure-state.
description: 9 pages, 10 figures; close to published version
Multi-Modal Data-Efficient 3D Scene Understanding for Autonomous Driving
Creators: name: Kong, Lingdong
name: Xu, Xiang
name: Ren, Jiawei
name: Zhang, Wenwei
name: Pan, Liang
name: Chen, Kai
name: Ooi, Wei Tsang
name: Liu, Ziwei
Publisher: name: arXiv
Year: 2024
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Efficient data utilization is crucial for advancing 3D scene understanding in autonomous driving, where reliance on heavily human-annotated LiDAR point clouds challenges fully supervised methods. Addressing this, our study extends into semi-supervised learning for LiDAR semantic segmentation, leveraging the intrinsic spatial priors of driving scenes and multi-sensor complements to augment the efficacy of unlabeled datasets. We introduce LaserMix++, an evolved framework that integrates laser beam manipulations from disparate LiDAR scans and incorporates LiDAR-camera correspondences to further assist data-efficient learning. Our framework is tailored to enhance 3D scene consistency regularization by incorporating multi-modality, including 1) multi-modal LaserMix operation for fine-grained cross-sensor interactions; 2) camera-to-LiDAR feature distillation that enhances LiDAR feature learning; and 3) language-driven knowledge guidance generating auxiliary supervisions using open-vocabulary models. The versatility of LaserMix++ enables applications across LiDAR representations, establishing it as a universally applicable solution. Our framework is rigorously validated through theoretical analysis and extensive experiments on popular driving perception datasets. Results demonstrate that LaserMix++ markedly outperforms fully supervised alternatives, achieving comparable accuracy with five times fewer annotations and significantly improving the supervised-only baselines. This substantial advancement underscores the potential of semi-supervised approaches in reducing the reliance on extensive labeled data in LiDAR-based 3D scene understanding systems.
description: TPAMI 2025; 18 pages, 6 figures, 9 tables; Code at https://github.com/ldkong1205/LaserMix
New limits on Bosonic Dark Matter, Solar Axions, Pauli Exclusion Principle Violation, and Electron Decay from the Majorana Demonstrator
Creators: name: Abgrall, N.
name: Arnquist, I. J.
name: Avignone, F. T.
name: Barabash, A. S.
name: Bertrand, F. E.
name: Bradley, A. W.
name: Brudanin, V.
name: Busch, M.
name: Buuck, M.
name: Caldwell, T. S.
name: Chan, Y-D.
name: Christofferson, C. D.
name: Chu, P. -H.
name: Cuesta, C.
name: Detwiler, J. A.
name: Dunagan, C.
name: Efremenko, Yu.
name: Ejiri, H.
name: Elliott, S. R.
name: Gilliss, T.
name: Giovanetti, G. K.
name: Goett, J.
name: Green, M. P.
name: Gruszko, J.
name: Guinn, I. S.
name: Guiseppe, V. E.
name: Haufe, C. R. S.
name: Henning, R.
name: Hoppe, E. W.
name: Howard, S.
name: Howe, M. A.
name: Jasinski, B. R.
name: Keeter, K. J.
name: Kidd, M. F.
name: Konovalov, S. I.
name: Kouzes, R. T.
name: Lopez, A. M.
name: MacMullin, J.
name: Martin, R. D.
name: Massarczyk, R.
name: Meijer, S. J.
name: Mertens, S.
name: O'Shaughnessy, C.
name: Poon, A. W. P.
name: Radford, D. C.
name: Rager, J.
name: Reine, A. L.
name: Rielage, K.
name: Robertson, R. G. H.
name: Shanks, B.
name: Shirchenko, M.
name: Suriano, A. M.
name: Tedeschi, D.
name: Trimble, J. E.
name: Varner, R. L.
name: Vasilyev, S.
name: Vetter, K.
name: Vorren, K.
name: White, B. R.
name: Wilkerson, J. F.
name: Wiseman, C.
name: Xu, W.
name: Yakushev, E.
name: Yu, C. -H.
name: Yumatov, V.
name: Zhitnikov, I.
name: Zhu, B. X.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: We present new limits on exotic keV-scale physics based on 478 kg d of MAJORANA DEMONSTRATOR commissioning data. Constraints at the 90% confidence level are derived on bosonic dark matter (DM) and solar axion couplings, Pauli exclusion principle violating (PEPV) decay, and electron decay using monoenergetic peak signal-limits above our background. Our most stringent DM constraints are set for 11.8 keV mass particles, limiting $g_{Ae} <4.5\times 10^{-13}$ for pseudoscalars and $\frac{α'}α < 9.7\times 10^{-28}$ for vectors. We also report a 14.4 keV solar axion coupling limit of $g_{AN}^{\mathrm{eff}}\times g_{Ae}~ 1.2 \times 10^{24}\;$yr for $e^- \rightarrow$ invisible.
Development of a Methodology for the Determination of Conceptual Automated Disassembly Systems
Creators: name: Wolff, Julius
name: Kolditz, Torge
name: Günther, Lutz
name: Raatz, Annika
Publisher: name: Berlin : Springer Vieweg
Year: 2017
Subjects: subject: Automated Disassembly Systems
subject: Disassembly Methodology
subject: Life Cycle
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik

description: At a certain point in its life cycle, a product will reach a condition where it partly or completely loses its functionality. When this happens, the disassembly has the ambition to regenerate a product-value or to enable an environmental friendly product recycling. With regard to the high workload and costs for manual labor one approach to increase the productivity of disassembly tasks is the use of automated disassembly systems (ADS). Depending on different life cycle scenarios, requirements on automated disassembly systems vary. Concerning this problem, a general methodology is developed, which enables the determination of a conceptual ADS by assigning automated modules that are processing the product disassembly. In the first place the objective of a disassembly is determined, followed by a closer investigation of the product. Thereby target components are defined, which has to disassembled. By looking at the connections between these target components suitable separation procedures are derived. Finally, modules of the automated disassembly system are determined.
Six-fold crystalline anisotropic magnetoresistance in the (111) LaAlO$_3$/SrTiO$_3$ oxide interface
Creators: name: Rout, P. K.
name: Agireen, I.
name: Maniv, E.
name: Goldstein, M.
name: Dagan, Y.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We measured the magnetoresistance of the 2D electron liquid formed at the (111) LaAlO$_3$/SrTiO$_3$ interface. The hexagonal symmetry of the interface is manifested in a six-fold crystalline component appearing in the anisotropic magnetoresistance (AMR) and planar Hall data, which agree well with symmetry analysis we performed. The six-fold component increases with carrier concentration, reaching 15% of the total AMR signal. Our results suggest the coupling between higher itinerant electronic bands and the crystal as the origin of this effect and demonstrate that the (111) oxide interface is a unique hexagonal system with tunable magnetocrystalline effects.
Evaluering af projekt viden - samskabelse af det gode arbejdsmiljø 2018-2019
Creators: Det Nationale Forskningscenter for Arbejdsmiljø NFA
Publisher: name: Rigsarkivet
Year: 2023

description: Arbejdstilsynet har i et strategisk partnerskab med en kommune igangsat et pilotprojekt for at styrke arbejdsmiljøindsatsen i kommunens ældrepleje. Formålet med projektet er at implementere arbejdsmiljøtiltag, der har fokus på at styrke de ansattes samarbejde med borgere og pårørende. Disse tiltag skal i sidste ende øge trivslen og motivationen blandt kommunens medarbejdere i plejegrupperne. Ydermere er formålet med pilotprojektet at få erfaring med, hvordan arbejdsmiljøtiltag kan spredes på tværs af organisationens arbejdspladser via MED-systemet.
Nærværende evalueringsprojekt har til hensigt at dokumentere denne spredning på tværs af organisationens plejegrupper i kommunen. Evalueringen har både fokus på proces og effekt.
The grasshopper problem
Creators: name: Goulko, Olga
name: Kent, Adrian
Publisher: name: arXiv
Year: 2017
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: Combinatorics (math.CO)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We introduce and physically motivate the following problem in geometric combinatorics, originally inspired by analysing Bell inequalities. A grasshopper lands at a random point on a planar lawn of area one. It then jumps once, a fixed distance $d$, in a random direction. What shape should the lawn be to maximise the chance that the grasshopper remains on the lawn after jumping? We show that, perhaps surprisingly, a disc shaped lawn is not optimal for any $d>0$. We investigate further by introducing a spin model whose ground state corresponds to the solution of a discrete version of the grasshopper problem. Simulated annealing and parallel tempering searches are consistent with the hypothesis that for $ d < π^{-1/2}$ the optimal lawn resembles a cogwheel with $n$ cogs, where the integer $n$ is close to $ π( \arcsin ( \sqrtπ d /2 ) )^{-1}$. We find transitions to other shapes for $d \gtrsim π^{-1/2}$.
description: Comments and references added. Ancillary files with simulation data included
Removing Ostrogradski ghost from degenerate gravity theories
Creators: name: Paul, Biswajit
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The Ostrogradski ghost problem that appears in higher derivative system is considered for systems with constraints. A prescription for removal of the ghost creating momenta is described based on the Dirac's constraint analysis. It is shown how one can make the canonical Hamiltonian bounded from below by systematically removing the constraints appearing in the system thereby reducing the effective dimension of the phase space. To show the effect of higher derivative terms we consider the singularity free Gauss-Bonnet theory coupled via a matter field to the Einstein Hilbert action. Finally we construct the ghost free canonical Hamiltonian for the theory that is bounded from below.
description: 20 pages, LaTex, slight modification in texts, to appear in PRD
Deltagerinvolverende intervention mod fysiske risikofaktorer for muskel- og skeletbesvær i byggebranchen, 2014
Creators: Det Nationale Forskningscenter for Arbejdsmiljø NFA
Publisher: name: Rigsarkivet
Year: 2023

description: Arbejdstilsynet har i et strategisk partnerskab med en kommune igangsat et pilotprojekt for at styrke arbejdsmiljøindsatsen i kommunens ældrepleje. Formålet med projektet er at implementere arbejdsmiljøtiltag, der har fokus på at styrke de ansattes samarbejde med borgere og pårørende. Disse tiltag skal i sidste ende øge trivslen og motivationen blandt kommunens medarbejdere i plejegrupperne. Ydermere er formålet med pilotprojektet at få erfaring med, hvordan arbejdsmiljøtiltag kan spredes på tværs af organisationens arbejdspladser via MED-systemet.
Nærværende evalueringsprojekt har til hensigt at dokumentere denne spredning på tværs af organisationens plejegrupper i kommunen. Evalueringen har både fokus på proces og effekt.
The quantum Rabi model in a superfluid Bose-Einstein condensate
Creators: name: Felicetti, S.
name: Romero, G.
name: Solano, E.
name: Sabín, C.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We propose a quantum simulation of the quantum Rabi model in an atomic quantum dot, which is a single atom in a tight optical trap coupled to the quasiparticle modes of a superfluid Bose-Einstein condensate. This widely tunable setup allows to simulate the ultrastrong coupling regime of light-matter interaction in a system which enjoys an amenable characteristic timescale, paving the way for an experimental analysis of the transition between the Jaynes-Cummings and the quantum Rabi dynamics using cold-atom systems. Our scheme can be naturally extended to simulate multi-qubit quantum Rabi models. In particular, we discuss the appearance of effective two-qubit interactions due to phononic exchange, among other features.
description: Improved version and references added
Teleparallel Conformal Invariant Models induced by Kaluza-Klein Reduction
Creators: name: Geng, Chao-Qiang
name: Luo, Ling-Wei
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the extensions of teleparallism in the Kaluza-Klein (KK) scenario by writing the analogous form to the torsion scalar $T_{\text{NGR}}$ in terms of the corresponding antisymmetric tensors, given by $T_{\text{NGR}} = a\,T_{ijk} \, T^{ijk} + b\,T_{ijk} \,T^{kji} + c\,T^{j}{}_{ji} \, T^{k}{}_{k}{}^{i}$, in the four-dimensional New General Relativity (NGR) with arbitrary coefficients $a$, $b$ and $c$. After the KK dimensional reduction, the Lagrangian in the Einstein-frame can be realized by taking $2a+b+c=0$ with the ghost-free condition $c\leq0$ for the one-parameter family of teleparallelism. We demonstrate that the pure conformal invariant gravity models can be constructed by the requirements of $2a+b=0$ and $c=0$. In particular, the torsion vector can be identified as the conformal gauge field, while the conformal gauge theory can be obtained by $2a+b+4c=0$ or $2a+b=0$, which is described on the Weyl-Cartan geometry $Y_4$ with the ghost-free conditions $2a+b+c>0$ and $c\neq0$. We also consider the weak field approximation and discuss the non-minimal coupled term of the scalar current and torsion vector. For the conformal invariant models with $2a+b=0$, we find that only the anti-symmetric tensor field is allowed rather than the symmetric one.
description: 23 pages, 1 figure, revised version accepted by Classical and Quantum Gravity
Habitability properties of circumbinary planets
Creators: name: Shevchenko, Ivan I.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: It is shown that several habitability conditions (in fact, at least seven such conditions) appear to be fulfilled automatically by circumbinary planets of main-sequence stars (CBP-MS), whereas on Earth these conditions are fulfilled only by chance. Therefore, it looks natural that most of the production of replicating biopolymers in the Galaxy is concentrated on particular classes of CBP-MS, and life on Earth is an outlier, in this sense. In this scenario, Lathe's mechanism for the tidal "chain reaction" abiogenesis on Earth is favored as generic for CBP-MS, due to photo-tidal synchronization inherent to them. Problems with this scenario are discussed in detail.
description: 42 pages. Published in AJ
The structure and statistics of interstellar turbulence
Creators: name: Kritsuk, Alexei G.
name: Ustyugov, Sergey D.
name: Norman, Michael L.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We explore the structure and statistics of multiphase, magnetized ISM turbulence in the local Milky Way by means of driven periodic box numerical MHD simulations. Using the higher order-accurate piecewise-parabolic method on a local stencil (PPML), we carry out a small parameter survey varying the mean magnetic field strength and density while fixing the rms velocity to observed values. We quantify numerous characteristics of the transient and steady-state turbulence, including its thermodynamics and phase structure, kinetic and magnetic energy power spectra, structure functions, and distribution functions of density, column density, pressure, and magnetic field strength. The simulations reproduce many observables of the local ISM, including molecular clouds, such as the ratio of turbulent to mean magnetic field at 100 pc scale, the mass and volume fractions of thermally stable HI, the lognormal distribution of column densities, the mass-weighted distribution of thermal pressure, and the linewidth-size relationship for molecular clouds. Our models predict the shape of magnetic field probability density functions (PDFs), which are strongly non-Gaussian, and the relative alignment of magnetic field and density structures. Finally, our models show how the observed low rates of star formation per free-fall time are controlled by the multiphase thermodynamics and large-scale turbulence.
description: 36 pages, 19 figures, a special issue article published in New J. Phys
Data-Efficient Exploration, Optimization, and Modeling of Diverse Designs through Surrogate-Assisted Illumination
Creators: name: Gaier, Adam
name: Asteroth, Alexander
name: Mouret, Jean-Baptiste
Publisher: name: arXiv
Year: 2017
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: The MAP-Elites algorithm produces a set of high-performing solutions that vary according to features defined by the user. This technique has the potential to be a powerful tool for design space exploration, but is limited by the need for numerous evaluations. The Surrogate-Assisted Illumination algorithm (SAIL), introduced here, integrates approximative models and intelligent sampling of the objective function to minimize the number of evaluations required by MAP-Elites. The ability of SAIL to efficiently produce both accurate models and diverse high performing solutions is illustrated on a 2D airfoil design problem. The search space is divided into bins, each holding a design with a different combination of features. In each bin SAIL produces a better performing solution than MAP-Elites, and requires several orders of magnitude fewer evaluations. The CMA-ES algorithm was used to produce an optimal design in each bin: with the same number of evaluations required by CMA-ES to find a near-optimal solution in a single bin, SAIL finds solutions of similar quality in every bin.
description: Genetic and Evolutionary Computation Conference 2017
Quantum emitters coupled to circular nanoantennas for high brightness quantum light sources
Creators: name: Abudayyeh, Hamza
name: Rapaport, Ronen
Publisher: name: arXiv
Year: 2017
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Engineering the directionality and emission rate of quantum light sources is essential in the development of modern quantum applications.In this work we use numerical calculations to optimize the brightness of a broadband quantum emitter positioned in a hybrid metal-dielectric circular periodic nanoantenna. The optimized structure features a photon collection efficiency of 74% (82%) and a photon flux enhancement of over 10 (6) into a numerical aperature of 0.22 (0.50) respectively, corresponding to a direct coupling into two types of multimode fibers. In order to enhance the emission rate, we present a new circular nanoantenna design where a quantum emitter is attached to a silver nanocone at the center of the antenna. After optimization, we find a collection efficiency of 61% (78%) into a numerical aperature of 0.22 (0.50), giving a brightness enhancement of 1000 (600) for an unpolarized emitter. The enhancements in both structures are broadband due to the low quality factor of the device and are therefore ideal for room-temperature sources. This type of a scalable design can be utilized towards on-chip, high brightness quantum light sources operating at room temperature.
Exposing the QCD Splitting Function with CMS Open Data
Creators: name: Larkoski, Andrew
name: Marzani, Simone
name: Thaler, Jesse
name: Tripathee, Aashish
name: Xue, Wei
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The splitting function is a universal property of quantum chromodynamics (QCD) which describes how energy is shared between partons. Despite its ubiquitous appearance in many QCD calculations, the splitting function cannot be measured directly since it always appears multiplied by a collinear singularity factor. Recently, however, a new jet substructure observable was introduced which asymptotes to the splitting function for sufficiently high jet energies. This provides a way to expose the splitting function through jet substructure measurements at the Large Hadron Collider. In this letter, we use public data released by the CMS experiment to study the 2-prong substructure of jets and test the 1 -> 2 splitting function of QCD. To our knowledge, this is the first ever physics analysis based on the CMS Open Data.
description: 7 pages, 5 figures; v2: references updated and figure formatting improved; v3: approximate version to appear in PRL
Η επίδραση της πιστοληπτικής αξιολόγησης μιας χώρας στο κόστος των δανείων
Creators: name: Ζιάρας, Μάρκος
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2023
Subjects: subject: Αξιολόγηση πιστοληπτικής ικανότητας
subject: Επιτόκια τραπεζικών δανείων
subject: Οίκοι αξιολόγησης
subject: Πιστωτικός κίνδυνος
subject: Sovereign ceiling
subject: GMM

description: Στόχος της εργασίας είναι να αναλύσουμε την επίδραση που έχουν οι αλλαγές στην αξιολόγηση της πιστοληπτικής ικανότητας μιας χώρας στο κόστος των τραπεζικών δανείων που χορηγούνται προς τις εγχώριες επιχειρήσεις. Η ανάλυση γίνεται για τις 19 χώρες της Ευρωζώνης από το 2003 έως το 2020 και συμπεριλαμβάνει επίσης και την χρήση επιπλέον ανεξάρτητων μεταβλητών που υποδεικνύονται από την υπάρχουσα βιβλιογραφία προκειμένου τα αποτελέσματα να είναι περισσότερο αντιπροσωπευτικά. Για την εκτίμηση του υποδείγματος γίνεται χρήση της Γενικευμένης Μεθόδου των Ροπών σε δεδομένα πάνελ. Από την εκτίμηση προκύπτει ότι η πιστοληπτική ικανότητά της χώρας επηρεάζει το κόστος δανεισμού των εγχώριων επιχειρήσεων καθώς ο συντελεστής προκύπτει αρνητικός και στατιστικά σημαντικός, ένα αποτέλεσμα το οποίο επιβεβαιώνεται από την υπάρχουσα βιβλιογραφία. Η ενότητα της εμπειρικής ανάλυσης κλείνει με τον έλεγχο αιτιότητας κατά Granger όπου διαπιστώνεται η ύπαρξη αμφίδρομης σχέσης αιτιότητας ανάμεσα στις δύο βασικές μεταβλητές του υποδείγματος. Τέλος, κρίνεται η ανάγκη μείωσης της εξάρτησης από τους οίκους αξιολόγησης καθώς με την παρούσα διπλωματική διαπιστώνεται ότι μπορούν να προκαλέσουν προβλήματα στις εγχώριες επιχειρήσεις αυξάνοντας το κόστος δανεισμού ανεξάρτητα από τα οικονομικά στοιχεία των ίδιων.
Unblinding the Dark Matter Blind Spots
Creators: name: Han, Tao
name: Kling, Felix
name: Su, Shufang
name: Wu, Yongcheng
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The dark matter (DM) blind spots in the Minimal Supersymmetric Standard Model (MSSM) refer to the parameter regions where the couplings of the DM particles to the $Z$-boson or the Higgs boson are almost zero, leading to vanishingly small signals for the DM direct detections. In this paper, we carry out comprehensive analyses for the DM searches under the blind-spot scenarios in MSSM. Guided by the requirement of acceptable DM relic abundance, we explore the complementary coverage for the theory parameters at the LHC, the projection for the future underground DM direct searches, and the indirect searches from the relic DM annihilation into photons and neutrinos. We find that (i) the spin-independent (SI) blind spots may be rescued by the spin-dependent (SD) direct detection in the future underground experiments, and possibly by the indirect DM detections from IceCube and SuperK neutrino experiments; (ii) the detection of gamma rays from Fermi-LAT may not reach the desirable sensitivity for searching for the DM blind-spot regions; (iii) the SUSY searches at the LHC will substantially extend the discovery region for the blind-spot parameters. The dark matter blind spots thus may be unblinded with the collective efforts in future DM searches.
description: 30 pages, 18 figures; Minor corrections, references updated, version published in JHEP
Classical-to-quantum crossover in electron on-demand emission
Creators: name: Kashcheyevs, Vyacheslavs
name: Samuelsson, Peter
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Emergence of a classical particle trajectory concept from the full quantum description is a key feature of quantum mechanics. Recent progress of solid state on-demand sources has brought single-electron manipulation into the quantum regime, however, the quantum-to-classical crossover remains unprobed. Here we describe theoretically a mechanism for generating single-electron wave packets by tunneling from a driven localized state, and show how to tune the degree of quantumness. Applying our theory to existing on-demand sources, we demonstrate the feasibility of an experimental investigation of quantum-to-classical crossover for single electrons, and open up yet unexplored potential for few-electron quantum technology devices.
description: final PRB version
Visual Attention Based Cognitive Human-Robot Collaboration for Pedicle Screw Placement in Robot-Assisted Orthopedic Surgery
Creators: name: Chen, Chen
name: Zou, Qikai
name: Song, Yuhang
name: Yu, Mingrui
name: Zhu, Senqiang
name: Song, Shiji
name: Li, Xiang
Publisher: name: arXiv
Year: 2024
Subjects: subject: Robotics (cs.RO)
subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Current orthopedic robotic systems largely focus on navigation, aiding surgeons in positioning a guiding tube but still requiring manual drilling and screw placement. The automation of this task not only demands high precision and safety due to the intricate physical interactions between the surgical tool and bone but also poses significant risks when executed without adequate human oversight. As it involves continuous physical interaction, the robot should collaborate with the surgeon, understand the human intent, and always include the surgeon in the loop. To achieve this, this paper proposes a new cognitive human-robot collaboration framework, including the intuitive AR-haptic human-robot interface, the visual-attention-based surgeon model, and the shared interaction control scheme for the robot. User studies on a robotic platform for orthopedic surgery are presented to illustrate the performance of the proposed method. The results demonstrate that the proposed human-robot collaboration framework outperforms full robot and full human control in terms of safety and ergonomics.
description: 7 pages, 8 figures, in IROS 2024
An overview of systematic reviews on the pharmacological randomized controlled trials for reducing intracranial pressure after traumatic brain injury
Creators: name: Kim, Sonya
name: Mortera, Marianne
name: Heyn, Patricia C.
name: Sood, Pallavi
name: Wen, Pey-Shan
name: Wong, Diana Chen
name: Tanveer, Sarah
name: Hu, Xiaolei
Publisher: name: Taylor & Francis
Year: 2022
Subjects: Medicine
Neuroscience
Pharmacology
Science Policy

description: There is a need for an overview of systematic reviews (SRs) examining randomized clinical trials (RCTs) of pharmacological interventions in the treatment of intracranial pressure (ICP) post-TBI. To summarize pharmacological effectiveness in decreasing ICP in SRs with RCTs and evaluate study quality. Comprehensive literature searches were conducted in MEDLINE, PubMed, EMBASE, PsycINFO, and Cochrane Library databases for English SRs through October 2020. Inclusion criteria were SRs with RCTs that examined pharmacological interventions to treat ICP in patients post-TBI. Data extracted were participant characteristics, pharmacological interventions, and ICP outcomes. Study quality was assessed with AMSTAR-2. Eleven SRs between 2003 and 2020 were included. AMSTAR-2 ratings revealed 3/11 SRs of high quality. Pharmacological interventions included hyperosmolars, neuroprotectives, anesthetics, sedatives, and analgesics. Study samples ranged from 7 to 1282 patients. Hyperosmolar agents and sedatives were beneficial in lowering elevated ICP. High bolus dose opioids had a more deleterious effect on ICP. Neuroprotective agents did not show any effects in ICP management. RCT sample sizes and findings in the SRs varied. A lack of detailed data syntheses was noted. AMSTAR-2 analysis revealed moderate to high quality in most SRs. Future SRs may focus on streamlined reporting of dosing and clearer clinical recommendations. PROSPERO-Registration: CRD42015017355.
Secular chaotic dynamics in hierarchical quadruple systems, with applications to hot Jupiters in stellar binaries and triples
Creators: name: Hamers, Adrian S.
name: Lai, Dong
Publisher: name: arXiv
Year: 2017
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Hierarchical quadruple systems arise naturally in stellar binaries and triples that harbour planets. Examples are hot Jupiters (HJs) in stellar triple systems, and planetary companions to HJs in stellar binaries. The secular dynamical evolution of these systems is generally complex, with secular chaotic motion possible in certain parameter regimes. The latter can lead to extremely high eccentricities and, therefore, strong interactions such as efficient tidal evolution. These interactions are believed to play an important role in the formation of HJs through high-eccentricity migration. Nevertheless, a deeper understanding of the secular dynamics of these systems is still lacking. Here we study in detail the secular dynamics of a special case of hierarchical quadruple systems in either the `2+2' or `3+1' configurations. We show how the equations of motion can be cast in a form representing a perturbed hierarchical three-body system, in which the outer orbital angular momentum vector is precessing steadily around a fixed axis. In this case, we show that eccentricity excitation can be significantly enhanced when the precession period is comparable to the Lidov-Kozai oscillation time-scale of the inner orbit. This arises from an induced large mutual inclination between the inner and outer orbits driven by the precession of the outer orbit, even if the initial mutual inclination is small. We present a simplified semi-analytic model that describes the latter phenomenon.
description: Revised to match MNRAS publication. 16 pages, 10 figures
title: Σχεδιασμός συσκευασίας φαρμάκων για ασθενείς με απώλειες μνήμης
title: Design of medical packaging for patients with memory losses
titleType: AlternativeTitle
Creators: name: Νικολακόπουλος, Πέτρος
Publisher: name: Πανεπιστήμιο Δυτικής Αττικής
Year: 2023
Subjects: Σχεδιασμός προϊόντος
Βιομηχανικός σχεδιασμός
Περιβαλλοντικός σχεδιασμός
Παραγωγή φαρμάκων
Συσκευασία φαρμάκων
Φαρμακοβιομηχανία

description: Ο κλάδος της Φαρμακοβιομηχανίας είναι ένας από τους πιο ισχυρούς και συνεχώς αναπτυσσόμενους με την πάροδο των χρόνων και την ανάπτυξη της τεχνολογίας και των επιστημών υγείας. Ο όρος φαρμακευτική βιομηχανία πρωτοεμφανίστηκε τον 20ο αιώνα με την παραγωγή και την αποτελεσματικότητα της ασπιρίνης από την εταιρία Bayern. Οι ανακαλύψεις τα τελευταία χρόνια στην Μοριακή Βιολογία και Βιοχημεία έχουν αλλάξει τον τρόπο εύρεσης νέων φαρμακευτικών προϊόντων από την τυχαία ανακάλυψη στην έρευνα, την παρακολούθηση και την συστηματική εξέλιξη. Η συσκευασία προϊόντων είναι από τους μεγαλύτερους τομείς στην παγκόσμια βιομηχανία και ιδιαίτερα στην βιομηχανία φαρμάκων. Είναι η τελευταία διαδικασία από την οποία περνάει το φάρμακο έτσι ώστε να είναι έτοιμο να παραδοθεί στον άνθρωπο. Ο πιο συνηθισμένος τρόπος συσκευασίας του φαρμάκου σε στερεά μορφή είναι η καρτέλα φαρμάκου και έπειτα η συσκευασία της καρτέλας μαζί με την οδηγία σε κουτί. Ένα μεγάλο πρόβλημα το οποίο μαστίζει και όλο και συνεχίζει να αυξάνεται είναι η εμφάνιση ασθενειών απώλειας μνήμης σε ανθρώπους μεγάλης ηλικίας και όχι μόνο. Για την οριστική αντιμετώπιση κάποιων περιπτώσεων αυτών ή συνήθως για την επιβράδυνση τους είναι αναγκαία η χορήγηση φαρμακευτικής αγωγής όπου στις περισσότερες περιπτώσεις η δοσοληψία με το πέρασμα του καιρού μπορεί να γίνεται λανθασμένα από τον ασθενή λόγω της αύξησης της απώλειας μνήμης του. Λόγω αυτού του προβλήματος, σκοπός της παρούσας διπλωματικής εργασίας είναι η μελέτη και η σχεδίαση συσκευασίας φαρμάκων για ομάδες ανθρώπων με προβλήματα απώλειας βραχυπρόθεσμης και μακροπρόθεσμης μνήμης. Στο 1ο Κεφάλαιο θα γίνει μία ανάλυση του σχεδιασμού προϊόντων στις διάφορες θεματικές του περιοχές και στο 2ο Κεφάλαιο θα γίνει αναφορά του τρόπου συσκευασίας και παραγωγής του φαρμάκου σε βιομηχανικό επίπεδο έτσι ώστε να έχουμε τις απαραίτητες γνώσεις για να γίνει ο σχεδιασμός της συσκευασίας στο 3ο Κεφάλαιο.
Object-Part Attention Model for Fine-grained Image Classification
Creators: name: Peng, Yuxin
name: He, Xiangteng
name: Zhao, Junjie
Publisher: name: arXiv
Year: 2017
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Fine-grained image classification is to recognize hundreds of subcategories belonging to the same basic-level category, such as 200 subcategories belonging to the bird, which is highly challenging due to large variance in the same subcategory and small variance among different subcategories. Existing methods generally first locate the objects or parts and then discriminate which subcategory the image belongs to. However, they mainly have two limitations: (1) Relying on object or part annotations which are heavily labor consuming. (2) Ignoring the spatial relationships between the object and its parts as well as among these parts, both of which are significantly helpful for finding discriminative parts. Therefore, this paper proposes the object-part attention model (OPAM) for weakly supervised fine-grained image classification, and the main novelties are: (1) Object-part attention model integrates two level attentions: object-level attention localizes objects of images, and part-level attention selects discriminative parts of object. Both are jointly employed to learn multi-view and multi-scale features to enhance their mutual promotions. (2) Object-part spatial constraint model combines two spatial constraints: object spatial constraint ensures selected parts highly representative, and part spatial constraint eliminates redundancy and enhances discrimination of selected parts. Both are jointly employed to exploit the subtle and local differences for distinguishing the subcategories. Importantly, neither object nor part annotations are used in our proposed approach, which avoids the heavy labor consumption of labeling. Comparing with more than 10 state-of-the-art methods on 4 widely-used datasets, our OPAM approach achieves the best performance.
description: 14 pages, submitted to IEEE Transactions on Image Processing
Εκτίμηση κινδύνου στις αγορές κρατικών ομολόγων της ζώνης του ευρώ
Creators: name: Χαμάκος, Διονύσιος
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2023
Subjects: subject: Ευρωπαϊκά κρατικά ομόλογα
subject: Αποδόσεις
subject: Οικονομική κρίση
subject: COVID-19
subject: Πιστωτικός κίνδυνος
subject: Κίνδυνος ρευστότητας
subject: Ποιότητα διακυβέρνησης

description: Οι αποδόσεις των κρατικών ομολόγων σύμφωνα με τα αποτελέσματα των ερευνών που έχουν προκύψει μετά από την περίοδο της οικονομικής κρίσης έδειξαν την έναρξη της αύξησης των αποδόσεων τους στην ζώνη του Ευρώ. Αυτό είχε ως αποτέλεσμα, να επηρεάσει τα spreads των κρατικών ομολόγων σε βαθμό που ακόμα και με την σύγκλιση των αποδόσεων να μην έχουν επιστρέψει σε επίπεδα προ ύφεσης. Σκοπός της παρούσας μελέτης, είναι η διάκριση των παραγόντων που επηρεάζουν τα ευρωπαϊκά ομόλογα και τις αποδόσεις τους, θέλοντας ωστόσο να συμπληρώσουμε έναν βασικό παράγοντα που κερδίζει όλο ένα και περισσότερο έδαφος στην αγορά, εκείνον της ποιοτικής και σταθερής διακυβέρνησης. Για την ερμηνεία, θα αναλύσουμε τον τρόπο με τον οποίο ο κίνδυνος ρευστότητας , ο πιστωτικός κίνδυνος όπως επίσης και αυτός της αποτελεσματικής διακυβέρνησης επηρέασαν με την συμβολή τους τα Ευρωπαϊκά κρατικά ομόλογα οδηγώντας τα στην μείωση των αποδόσεων τους.
Radial metal abundance profiles in the intra-cluster medium of cool-core galaxy clusters, groups, and ellipticals
Creators: name: Mernier, François
name: de Plaa, Jelle
name: Kaastra, Jelle S.
name: Zhang, Yu-Ying
name: Akamatsu, Hiroki
name: Gu, Liyi
name: Kosec, Peter
name: Mao, Junjie
name: Pinto, Ciro
name: Reiprich, Thomas H.
name: Sanders, Jeremy S.
name: Simionescu, Aurora
name: Werner, Norbert
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The hot intra-cluster medium (ICM) permeating galaxy clusters and groups is not pristine, as it is continuously enriched by metals synthesised in Type Ia (SNIa) and core-collapse (SNcc) supernovae since the major epoch of star formation (z ~ 2-3). The cluster/group enrichment history and the mechanisms responsible for releasing and mixing the metals can be probed via the radial distribution of SNIa and SNcc products within the ICM. In this paper, we use deep XMM-Newton/EPIC observations from a sample of 44 nearby cool-core galaxy clusters, groups, and ellipticals (CHEERS) to constrain the average radial O, Mg, Si, S, Ar, Ca, Fe, and Ni abundance profiles. The radial distributions of all these elements, averaged over a large sample for the first time, represent the best constrained profiles available currently. We find an overall decrease of the Fe abundance with radius out to ~$0.9 r_{500}$ and ~$0.6 r_{500}$ for clusters and groups, respectively, in good agreement with predictions from the most recent hydrodynamical simulations. The average radial profiles of all the other elements (X) are also centrally peaked and, when rescaled to their average central X/Fe ratios, follow well the Fe profile out to at least ~0.5$r_{500}$. Using two sets of SNIa and SNcc yield models reproducing well the X/Fe abundance pattern in the core, we find that, as predicted by recent simulations, the relative contribution of SNIa (SNcc) to the total ICM enrichment is consistent with being uniform at all radii, both for clusters and groups. In addition to implying that the central metal peak is balanced between SNIa and SNcc, our results suggest that the enriching SNIa and SNcc products must share the same origin, and that the delay between the bulk of the SNIa and SNcc explosions must be shorter than the timescale necessary to diffuse out the metals.
description: 28 pages, 19 figures, accepted for publication in A&A
Perfectionism, Big Five and biopsychosocial functioning among parents of children with and without acquired brain injury (ABI)
Creators: name: Yehene, Einat
name: Zukerman, Hadas
name: Goldzweig, Gil
name: Gerner, Maya
name: Brezner, Amichai
name: Landa, Jana
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Personality factors are often investigated in the context of parenting but are rarely studied in relation to coping with child disabilities like pediatric acquired brain injury (pABI). This study (1) compares Biopsychosocial functioning (BPSF), Big Five personality traits, and dimensions of perfectionism of parents of children with and without pABI, and (2) examines the role personality factors play in parental BPSF in each group. 57 parents of children who sustained a significant pABI and 50 parents of typically developing children participated in this cross-sectional study. Parents completed scales measuring Multidimensional Perfectionism, Big Five inventory, and BPSF. Among the pABI group, multivariate analysis indicated significantly poorer BPSF, higher levels of neuroticism, socially prescribed perfectionism, and lower levels of openness, than controls. Regression analysis showed that personality explained 60.5% of the variance in parental BPSF post pABI. In both samples, neuroticism and socially prescribed perfectionism appeared as two prominent personality factors with a significant negative effect on parental BPSF, while self-perfectionism appeared prominent only in the pABI group, indicating a significant positive effect. pABI may result in changes to parents` personality. Personality characteristics significantly contribute to parental BPSF post-injury and should be addressed in clinical practice.