cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A study of the accretion mechanisms of the High Mass X-ray Binary IGR J00370+6122
Creators: name: Uchida, Nagomi
name: Takahashi, Hiromitsu
name: Fukazawa, Yasushi
name: Makishima, Kazuo
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: IGR J00370+6122 is a high-mass X-ray binary, of which the primary is a B1 Ib star, whereas the companion is suggested to be a neutron star by the detection of 346-s pulsation in one-off 4-ks observation. To better understand the nature of the compact companion, the present work performs timing and spectral studies of the X-ray data of this object, taken with XMM-Newton, Swift, Suzaku, RXTE, and INTEGRAL. In the XMM-Newton data, a sign of coherent 674 s pulsation was detected, for which the previous 346-s period may be the 2nd harmonic. The spectra exhibited the "harder when brighter" trend in the 1$-$10 keV range, and a flat continuum without clear cutoff in the 10$-$80 keV range. These properties are both similar to those observed from several low-luminosity accreting pulsars, including X Persei in particular. Thus, the compact object in IGR J00370+6122 is considered to be a magnetized neutron star with a rather low luminosity. The orbital period was refined to $15.6649 \pm 0.0014$ d. Along the orbit, the luminosity changes by 3 orders of magnitude, involving a sudden drop from $\sim 4 \times 10^{33}$ to $\sim 1\times10^{32}$ erg s$^{-1}$ at an orbital phase of 0.3 (and probably vice verse at 0.95). Although these phenomena cannot be explained by a simple Hoyle-Lyttleton accretion from the primary's stellar winds, they can be explained when incorporating the propeller effect with a strong dipole magnetic field of $\sim 5 \times10^{13}$ G. Therefore, the neutron star in IGR J00370+6122 may have a stronger magnetic field compared to ordinary X-ray pulsars.
description: 29 pages, 10 figures, 2 tables, accepted for publication in PASJ
Superconducting pairing symmetry in the kagome-lattice Hubbard model
Creators: name: Wen, Chenyue
name: Zhu, Xingchuan
name: Xiao, Zhisong
name: Hao, Ning
name: Mondaini, Rubem
name: Guo, Huaiming
name: Feng, Shiping
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The dominating superconducting pairing symmetry of the kagome-lattice Hubbard model is investigated using the determinant quantum Monte Carlo method. The superconducting instability occurs when doping the correlated insulators formed by the Hubbard interaction near the Dirac filling, and the superconducting state exhibits an electron-hole asymmetry. Among the pairing symmetries allowed, we demonstrate that the dominating channel is d-wave in the hole-doped case. This opens the possibility of condensation into an unconventional $d_{x^2-y^2}+id_{xy}$ phase, which is characterized by an integer topological invariant and gapless edge states. In contrast, the $s^*$-wave channel, which has no change of sign in the pairing function, is favored by electron doping. We further find the dominating $s^*$-wave pairing persists up to the Van Hove singularity. The results are closely related to the recent experimental observations in kagome compounds AV3Sb5(A: K, Rb, Cs), and provide insight into the pairing mechanism of their superconducting states.
Generic estimates for magnetic fields generated during inflation including Dirac-Born-Infeld theories
Creators: name: Bamba, Kazuharu
name: Ohta, Nobuyoshi
name: Tsujikawa, Shinji
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We estimate the strength of large-scale magnetic fields produced during inflation in the framework of Dirac-Born-Infeld (DBI) theories. This analysis is sufficiently general in the sense that it covers most of conformal symmetry breaking theories in which the electromagnetic field is coupled to a scalar field. In DBI theories there is an additional factor associated with the speed of sound, which allows a possibility to lead to an extra amplification of the magnetic field in a ultra-relativistic region. We clarify the conditions under which seed magnetic fields to feed the galactic dynamo mechanism at a decoupling epoch as well as present magnetic fields on galactic scales are sufficiently generated to satisfy observational bounds.
description: 7 pages, no figure, accepted in Phys. Rev. D
Lasianthus maculatus Craib 1933
Creators: name: Napiroon, Tiwtawat
name: Chayamarit, Kongkanda
name: Dawson, Sally
name: Till, Walter
name: Balslev, Henrik
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Gentianales
Rubiaceae
Lasianthus
Lasianthus maculatus

description: 35. Lasianthus maculatus Craib (1933:22). Type: ― THAILAND. Chanthaburi, Koh Chang, Khlong Mayom waterfall, 2 April 1923, A. F. G. Kerr 6817 (holotype K000777018!; isotype BM001191339 image!).
T hailand: ―Only known from the type collection.
Distribution: ―Peninsular Malaysia, Thailand (South-Eastern).
Ecology: ―Moist evergreen forest. Fruiting in April.
Notes: ― Lasianthus maculatus has conspicuous stipules that remain on the plant, 9‒11 mm long, 2 mm width, narrowly triangular or linear, hirsute and fresh drupes white, ellipsoid, 6‒7 mm long, 5 mm diameter, subglabrous with 4 pyrenes.
description: Published as part of Napiroon, Tiwtawat, Chayamarit, Kongkanda, Dawson, Sally, Till, Walter & Balslev, Henrik, 2020, A synopsis of Lasianthus (Lasiantheae, Rubiaceae) in Thailand and two additional new species, pp. 1-38 in Phytotaxa 439 (1) on page 22, DOI: 10.11646/phytotaxa.439.1.1, http://zenodo.org/record/13873503
Simulating spin-orbit coupled Bose-Einstein condensates: a concise overview for non-experts
Creators: name: Pollard, Dylan R.
Publisher: name: arXiv
Year: 2025
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Cold ensembles of bosons are a useful platform for studying many-body quantum states present in quantum technologies, and simulations of these systems are convenient for streamlining design of such technologies. This paper provides an overview of spin-orbit coupled Bose-Einstein condensates (SOC BECs), along with an overview of simulation methods and a case study on a novel "microemulsion" phase. These SOC-BECs are further described in the context of coherent states quantum field theory, utilizing the complex Langevin sampling scheme as a numerical algorithm. This approach for studying SOC BECs is a versatile and powerful alternative to particle-based methods and has promise for simulating other bosonic quantum states.
description: 5 pages, 3 figures
Q-Curvature, Spectral Invariants, and Representation Theory
Creators: name: Branson, Thomas P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Differential Geometry (math.DG)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We give an introductory account of functional determinants of elliptic operators on manifolds and Polyakov-type formulas for their infinitesimal and finite conformal variations. We relate this to extremal problems and to the Q-curvature on even-dimensional conformal manifolds. The exposition is self-contained, in the sense of giving references sufficient to allow the reader to work through all details.
description: This is a contribution to the Proceedings of the 2007 Midwest Geometry Conference in honor of Thomas P. Branson, published in SIGMA (Symmetry, Integrability and Geometry: Methods and Applications) at http://www.emis.de/journals/SIGMA/
Three-body crossover from a Cooper triple to bound trimer state in three-component Fermi gases near a triatomic resonance
Creators: name: Tajima, Hiroyuki
name: Tsutsui, Shoichiro
name: Doi, Takahiro M.
name: Iida, Kei
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We theoretically investigate ground-state properties of a three-component Fermi gas with pairwise contact interactions between different components near a triatomic resonance where bound trimers are about to appear. Using variational equations for in-medium two- and three-body cluster states in three dimensions, we elucidate the competition of pair and triple formations due to the Fermi surface effects. We present the ground-state phase diagram that exhibits transition from a Cooper pair to Cooper triple state and crossover from a Cooper triple to tightly bound trimer state at negative scattering lengths. This three-body crossover is analogous to the Bardeen-Cooper-Schrieffer to Bose-Einstein condensation crossover observed in a two-component Fermi gas. We predict that the threshold scattering length $a_{-}$ for three-body states can be shifted towards the weak-coupling side due to the emergence of Cooper triples.
description: 21 pages, 4 figures
Object-Centric 2D Gaussian Splatting: Background Removal and Occlusion-Aware Pruning for Compact Object Models
Creators: name: Rogge, Marcel
name: Stricker, Didier
Publisher: name: arXiv
Year: 2025
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Current Gaussian Splatting approaches are effective for reconstructing entire scenes but lack the option to target specific objects, making them computationally expensive and unsuitable for object-specific applications. We propose a novel approach that leverages object masks to enable targeted reconstruction, resulting in object-centric models. Additionally, we introduce an occlusion-aware pruning strategy to minimize the number of Gaussians without compromising quality. Our method reconstructs compact object models, yielding object-centric Gaussian and mesh representations that are up to 96% smaller and up to 71% faster to train compared to the baseline while retaining competitive quality. These representations are immediately usable for downstream applications such as appearance editing and physics simulation without additional processing.
description: ICPRAM 2025. Implementation details (no code): https://github.com/MarcelRogge/object-centric-2dgs
(S,w)-Gap Shifts and Their Entropy
Creators: name: Ramirez, Cristian
name: Somers, Amy
Publisher: name: arXiv
Year: 2025
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37B10, 37A35

description: The $S$-gap shifts have a dynamically and combinatorially rich structure. Dynamical properties of the $S$-gap shift can be related to the properties of the set $S$. This interplay is particularly interesting when $S$ is not syndetic such as when $S$ is the set of prime numbers or when $S=\{2^n\}$. It is a well known result that the entropy of the $S$-gap shift is given by $h(X) = \log λ$, where $λ>0$ is the unique solution to the equation $\sum_{n \in S} λ^{-(n+1)}=1$. Fix a point $w$ of the full shift $\{1,2, \dots, k\}^\mathbb{Z}$. We introduce the $(S,w)$-gap shift which is a generalization of the $S$-gap shift consisting of sequences in $\{0,1, \dots, k\}^\mathbb{Z}$ in which any two $0$'s are separated by a word $u$ appearing in $w$ such that $|u|\in S$. We extend the formula for the entropy of the $S$-gap shift to a formula describing the entropy of this new class of shift spaces. Additionally we investigate the dynamical properties including irreducibility and mixing of this generalization of the $S$-gap shift.
C^3Net: End-to-End deep learning for efficient real-time visual active camera control
Creators: name: Kyrkou, Christos
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences
subject: 65D19, 68T45, 68T07

description: The need for automated real-time visual systems in applications such as smart camera surveillance, smart environments, and drones necessitates the improvement of methods for visual active monitoring and control. Traditionally, the active monitoring task has been handled through a pipeline of modules such as detection, filtering, and control. However, such methods are difficult to jointly optimize and tune their various parameters for real-time processing in resource constraint systems. In this paper a deep Convolutional Camera Controller Neural Network is proposed to go directly from visual information to camera movement to provide an efficient solution to the active vision problem. It is trained end-to-end without bounding box annotations to control a camera and follow multiple targets from raw pixel values. Evaluation through both a simulation framework and real experimental setup, indicate that the proposed solution is robust to varying conditions and able to achieve better monitoring performance than traditional approaches both in terms of number of targets monitored as well as in effective monitoring time. The advantage of the proposed approach is that it is computationally less demanding and can run at over 10 FPS (~4x speedup) on an embedded smart camera providing a practical and affordable solution to real-time active monitoring.
description: Journal of Real-Time Image Processing , 2021. Real-time active vision, Smart camera, Deep learning, End-to-end learning https://www.youtube.com/watch?v=UuepDtWUpsg&ab_channel=ChristosKyrkou. arXiv admin note: text overlap with arXiv:2012.06428
Lasianthus malaccensis King & Gamble 1904
Creators: name: Napiroon, Tiwtawat
name: Chayamarit, Kongkanda
name: Dawson, Sally
name: Till, Walter
name: Balslev, Henrik
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Gentianales
Rubiaceae
Lasianthus
Lasianthus malaccensis

description: 36. Lasianthus malaccensis King & Gamble (1904:124). Type: ― MALAYSIA. Malacca, G. Ledang, Mt. Ophir, 1892, H. N. Ridley 3219 (holotype SING0059243 image!; isotype K000763893!).
T hailand: ―PENINSULAR. Nakhon Si Thammarat: Khao Luang National Park, 30 April 1918, A. F. G. Kerr 15532 (K).
Distribution: ―Peninsular Malaysia, Thailand (Peninsular).
Ecology: ―Evergreen forest or moist evergreen forest. Flowering and fruiting in March‒April.
Notes: ―This species is similar to L. chinensis but Lasianthus malaccensis has conspicuous and persistent stipules that are 1.5 mm long, broadly triangular and abruptly narrowed into puberulous apex, the calyx is campanulate-cupular 1.5‒2 mm long minutely 5-toothed, the drupes are subglobose, 5‒6 mm diameter, subglabrous with 4‒5 pyrenes. In contrast L. chinensis has triangular stipules that are 2‒3 mm long and pubescent, the calyx is elongated campanulate 5‒ 7 mm long with 4–6 orbicular reflexed lobes, the drupes are ovoid with longitudinal angles, 8 mm diameter, pubescent with 5‒6 pyrenes.
description: Published as part of Napiroon, Tiwtawat, Chayamarit, Kongkanda, Dawson, Sally, Till, Walter & Balslev, Henrik, 2020, A synopsis of Lasianthus (Lasiantheae, Rubiaceae) in Thailand and two additional new species, pp. 1-38 in Phytotaxa 439 (1) on page 22, DOI: 10.11646/phytotaxa.439.1.1, http://zenodo.org/record/13873503
Constructing word similarities in Meroitic as an aid to decipherment
Creators: name: Smith, Reginald D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: Meroitic is the still undeciphered language of the ancient civilization of Kush. Over the years, various techniques for decipherment such as finding a bilingual text or cognates from modern or other ancient languages in the Sudan and surrounding areas has not been successful. Using techniques borrowed from information theory and natural language statistics, similar words are paired and attempts are made to use currently defined words to extract at least partial meaning from unknown words.
description: 10 pages; 2 figures; to appear in British Museum studies in Ancient Egypt and Sudan
Canonical forms for complex matrix congruence and *congruence
Creators: name: Horn, Roger A.
name: Sergeichuk, Vladimir V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 15A21; 15A63

description: Canonical forms for congruence and *congruence of square complex matrices were given by Horn and Sergeichuk in [Linear Algebra Appl. 389 (2004) 347-353], based on Sergeichuk's paper [Math. USSR, Izvestiya 31 (3) (1988) 481-501], which employed the theory of representations of quivers with involution. We use standard methods of matrix analysis to prove directly that these forms are canonical. Our proof provides explicit algorithms to compute all the blocks and parameters in the canonical forms. We use these forms to derive canonical pairs for simultaneous congruence of pairs of complex symmetric and skew-symmetric matrices as well as canonical forms for simultaneous *congruence of pairs of complex Hermitian matrices.
description: 31 pages
Lasianthus marginatus Craib 1933
Creators: name: Napiroon, Tiwtawat
name: Chayamarit, Kongkanda
name: Dawson, Sally
name: Till, Walter
name: Balslev, Henrik
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Gentianales
Rubiaceae
Lasianthus
Lasianthus marginatus

description: 37. Lasianthus marginatus Craib (1933:23). Type: ― THAILAND. Chanthaburi, Makham district, 4 December 1924, A. F. G. Kerr 9551 (holotype K000777017!; isotype BK257390!).
T hailand: ―Only known from the type collection.
Distribution: ―Endemic to Thailand (South-Eastern).
Ecology: ―Evergreen forest in shaded places. Fruiting in December.
Notes: ― Lasianthus marginatus is similar to L. helferi but it differs by having branches and branchlets that are sparely hirsute (not glabrous), leaves oblong to oblong-oblanceolate, 5‒8 × 2‒2.5 cm, sparely hirsute (not narrowly oblong-lanceolate, 9‒13 × 3‒3.5 cm, densely hispid), stipules lanceolate, persistent, 8 mm long, sparely hirsute (not stipules triangular-lanceolate, persistent, 5‒6 mm long, glabrous), leaf apex acute, base oblique-rotunded (not apex acuminate, base acute), calyx campanulate, minutely 4‒5 toothed or truncate, 6 mm long, densely pilose (not calyx tubular, truncate, 4‒5 mm long, puberulous) and drupes have 5 hirsute, pyrenes (not 6 glabrous pyrenes).
description: Published as part of Napiroon, Tiwtawat, Chayamarit, Kongkanda, Dawson, Sally, Till, Walter & Balslev, Henrik, 2020, A synopsis of Lasianthus (Lasiantheae, Rubiaceae) in Thailand and two additional new species, pp. 1-38 in Phytotaxa 439 (1) on page 22, DOI: 10.11646/phytotaxa.439.1.1, http://zenodo.org/record/13873503
Results from Upsilon(5S) at Belle: Strange Beauty and other Beasts
Creators: name: Kinoshita, K.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The Belle experiment collected in 2005-6 a total of 23.6 fb$^{-1}$ of data at the $Υ(10860)$ resonance, also known as $Υ$(5S). These constitute nearly all of the world's sample of $e^+e^- \to Υ$(10860) events, which provide clean $B_s$ pairs. We present here several $B_s$ and $Υ$(10860) properties recently extracted from these data.
description: 5 pages, talk presented at the Lake Louise Winter Institute, 18-23 February, 2008
Vacuum Stability Conditions and Potential Minima for a Matrix Representation in Lightcone Orbit Space
Creators: name: Kannike, Kristjan
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The orbit space for a scalar field in a complex square matrix representation obtains a Minkowski space structure from the Cauchy-Schwarz inequality. It can be used to find vacuum stability conditions and minima of the scalar potential. The method is suitable for fields such as a bidoublet, an $SU(2)$ triplet or $SU(3)$ octet. We use the formalism to find the vacuum stability conditions for the left-right symmetric potential of a bidoublet and left and right Higgs doublets.
description: 17 pages, 3 figures, typos corrected
Diggr Video Game Vocabulary
Creators: name: Hoffmann, Tracy
Publisher: name: Zenodo
Year: 2019
Subjects: Vocabulary
Video Games

description: To support video game research, the diggr (Databased Infrastructure for Global Game Culture Research) project aims to integrate and interlink datasets to construct an extensible knowledge graph for video games. For this task the diggr Video Game Vocabulary was created. It is used to mediate between three different sources of video game metadata: MediaArt DB, GameFAQs and Mobygames.
Toolbox for entanglement detection and fidelity estimation
Creators: name: Gühne, Otfried
name: Lu, Chao-Yang
name: Gao, Wei-Bo
name: Pan, Jian-Wei
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The determination of the state fidelity and the detection of entanglement are fundamental problems in quantum information experiments. We investigate how these goals can be achieved with a minimal effort. We show that the fidelity of GHZ and W states can be determined with an effort increasing only linearly with the number of qubits. We also present simple and robust methods for other states, such as cluster states and states in decoherence-free subspaces.
description: 5 pages, no figures, v3: final version, to appear as a Rapid Communication in PRA
Background of radio photons from primordial black holes
Creators: name: Mittal, Shikhar
name: Kulkarni, Girish
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We compute the isotropic radiation background due to Hawking emission from primordial black holes (PBHs), and examine if this background is a viable option in explaining the excess radiowave background observed by the ARCADE2 and LWA1 experiments at $\lesssim 1\,$GHz. We find that even under the extreme assumption that all of the dark matter is in the form of PBHs, the radio brightness temperature induced by Hawking evaporation of PBHs is $\mathcal{O}(10^{-46})\,$K, highly subdominant compared to the cosmic microwave background. The main reason for this is that for PBHs in the mass range $\sim10^{12}$-$10^{14}\,$kg, which can be constrained by Hawking emission, the spectrum peaks at $10^7$ to $10^5\,$eV. As the Hawking spectrum is power law suppressed towards lower energies, negligible flux of $μ$eV photons is obtained. The peak of the Hawking spectrum shifts to lower energies for higher masses, but the number density is low and so is the specific intensity. Because Hawking emission from PBHs is thus unable to explain the observed excess radio background, we also consider the alternative possibility of radio emission from gas accretion onto supermassive PBHs. These PBHs can readily produce strong radio emission that could easily explain the ARCADE2/LWA1 excess.
description: Published
Lasianthus oblongus King & Gamble 1904
Creators: name: Napiroon, Tiwtawat
name: Chayamarit, Kongkanda
name: Dawson, Sally
name: Till, Walter
name: Balslev, Henrik
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Gentianales
Rubiaceae
Lasianthus
Lasianthus oblongus

description: 39. Lasianthus oblongus King &Gamble(1904:127). Type (lectotype designated by K.M. Wong 1989):― MALAYSIA. Perak, April 1883, King’s collection 4128 (lectotype SING0059238 image!; isolectotype K000763891!). (Figure 3S).
T hailand: ―PENINSULAR. Yala: Betong district, 11 June 2005, V. Chamchumroon & M. Poopath VC2193 (BKF, PSU), Ban Nang Sata district, 17 October 2017, Poopath M. 2012 (BKF).
Distribution: ―Peninsular Malaysia, Thailand (Peninsular).
Ecology: ―Lowland tropical rain forests at an elevation of 100– 150 m.
Note: ― Lasianthus oblongus is known from small populations scattered in the western and northwestern Malaysia, and some parts of northern Perak State connected with natural areas in Yala province of Thailand, where we have found this species (Napiroon et al. 2018).
description: Published as part of Napiroon, Tiwtawat, Chayamarit, Kongkanda, Dawson, Sally, Till, Walter & Balslev, Henrik, 2020, A synopsis of Lasianthus (Lasiantheae, Rubiaceae) in Thailand and two additional new species, pp. 1-38 in Phytotaxa 439 (1) on page 23, DOI: 10.11646/phytotaxa.439.1.1, http://zenodo.org/record/13873503
Tetraquarks in the Born-Oppenheimer approximation
Creators: name: Germani, Davide
name: Grinstein, Benjamin
name: Polosa, Antonio Davide
Publisher: name: arXiv
Year: 2025
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The conventional loosely bound molecule interpretation of the $X(3872)$ is not compatible with the recent LHCb experimental measurement of the ratio of branching fractions $\mathcal{R}=\text{Br}(X\toψ^\primeγ)/\text{Br}(X\toψγ)$. We systematically determine the entire tetraquark spectrum for $J=0,1,2$ and refine the calculation of $\mathcal{R}$ in an improved Born-Oppenheimer description of the $X(3872)$ compact tetraquark. This refinement yields a significantly better agreement with experimental data on ${\cal R}$ and on the spectroscopy of the states themselves. Extending the diquark-antidiquark paradigm to encompass tetraquarks that are linear superposition of open charm singlets and color octets, we discover that these exotic resonances manifest as compact shallow bound states of quarks in color force potentials.
description: 32 pages, 11 figures. v2: minor changes; the notation has been modified
Correlation in states of two identical particles
Creators: name: Zhou, D. L.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We identify the correlation in a state of two identical particles as the residual information beyond what is already contained in the 1-particle reduced density matrix, and propose a correlation measure based on the maximum entropy principle. We obtain the analytical results of the correlation measure, which make it computable for arbitrary two-particle states. We also show that the degrees of correlation in the same two-particle states with different particle types will decrease in the following order: bosons, fermions, and distinguishable particles.
description: 3.6 pages
Foundations of a Knee Joint Digital Twin from qMRI Biomarkers for Osteoarthritis and Knee Replacement
Creators: name: Hoyer, Gabrielle
name: Gao, Kenneth T
name: Gassert, Felix G
name: Luitjens, Johanna
name: Jiang, Fei
name: Majumdar, Sharmila
name: Pedoia, Valentina
Publisher: name: arXiv
Year: 2025
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: Image and Video Processing (eess.IV)
subject: Applications (stat.AP)
subject: FOS: Biological sciences
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This study forms the basis of a digital twin system of the knee joint, using advanced quantitative MRI (qMRI) and machine learning to advance precision health in osteoarthritis (OA) management and knee replacement (KR) prediction. We combined deep learning-based segmentation of knee joint structures with dimensionality reduction to create an embedded feature space of imaging biomarkers. Through cross-sectional cohort analysis and statistical modeling, we identified specific biomarkers, including variations in cartilage thickness and medial meniscus shape, that are significantly associated with OA incidence and KR outcomes. Integrating these findings into a comprehensive framework represents a considerable step toward personalized knee-joint digital twins, which could enhance therapeutic strategies and inform clinical decision-making in rheumatological care. This versatile and reliable infrastructure has the potential to be extended to broader clinical applications in precision health.
description: This manuscript builds on an earlier preprint version available on Research Square: https://doi.org/10.21203/rs.3.rs-4317958/v1
Correlations between nuclear incompressibility, liquid-gas critical point, and quarkyonic transition
Creators: name: Lysenko, Artemiy
name: Gorenstein, Mark I.
name: Moss, Tripp
name: Poberezhniuk, Roman
name: Vovchenko, Volodymyr
Publisher: name: arXiv
Year: 2025
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We systematically probe different parametrizations of the attractive nuclear force based on real gas models to construct the nuclear matter equation of state. In each of the cases, the repulsion between nucleons is treated in the framework of excluded volume, and interaction parameters are fitted to the empirical properties of the nuclear ground state. We calculate the critical temperature $T_c$ and critical particle number density $n_c$, and find that they are strongly correlated. Both are also correlated with the incompressibility $K_0$ in the nuclear ground state. We also include a quarkyonic matter phase in the quasiparticle description and investigate the relationships among $K_0$, transition density to the quarkyonic phase, $n_{tr}$, and corresponding peak in the speed of sound, $v_{s, {\rm max}}^2$. At each density, the quark fraction is found by minimizing the energy density. We find that both $n_{tr}$ and $v_{s, {\rm max}}^2$ are negatively correlated with $K_0$, $n_c$, and $T_c$.
description: 9 pages, 4 figures, 3 tables
A system for constructing relatively small polyhedra from Sonobé modules
Creators: name: Riskin, Adrian
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Mathematics (math.GM)
subject: FOS: Mathematics
subject: 52B99

description: We develop a quite elementary graph theoretic system for designing small-size augmented origami polyhedra out of Sonobé modules beginning with a (convex or not) deltahedron.
description: 4 pages. Mathematical origami methods
Testing the impact of electromagnetic fields on the directed flow of constituent quarks in heavy-ion collisions
Creators: name: Sheikh, Ashik Ikbal
name: Keane, Declan
name: Tribedy, Prithwish
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: It has been proposed that strong electromagnetic fields produced in the early stages of heavy-ion collisions can lead to splitting of the rapidity-odd directed flow of positive and negative hadrons. For light hadrons, the interpretation of such measurements is complicated by the low magnitude of directed flow as well as by ambiguities arising from transported quarks. To overcome these complications, we propose measurements using only hadrons carrying produced quarks ($\bar{u},\bar{d},s,\bar{s}$). We discuss how to identify the kinematics where such hadrons are produced via the coalescence mechanism and therefore their flow is the sum of the flow of their constituent quarks. With this sum rule verified for certain combinations of hadrons, the expected systematic violation of this rule with increasing electric charge can be measured, which could be a consequence of the electromagnetic fields produced in the collisions. Our approach can be tested with the high statistics data from Phase II of the Beam Energy Scan (BES) program at the Relativistic Heavy Ion Collider (RHIC).
description: 9 pages, 5 figures, v2: figure 2 updated, v3: corrected one citation, v4: version accepted in journal
Study of Bc --> J/psi pi, etac pi decays with perturbative QCD approach
Creators: name: Sun, Jun-Feng
name: Du, Dong-Sheng
name: Yang, Yue-Ling
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The Bc --> J/psi pi, etac pi decays are studied with the perturbative QCD approach. It is found that form factors and branching ratios are sensitive to the parameters w, v, f_J/psi and f_etac, where w and v are the parameters of the charmonium wave functions for Coulomb potential and harmonic oscillator potential, respectively, f_J/psi and f_etac are the decay constants of the J/psi and etac mesons, respectively. The large branching ratios and the clear signals of the final states make the Bc --> J/psi pi, etac pi decays to be the prospective channels for measurements at the hadron colliders
description: 21 pages, revtex4
The development of a new measure of creative abilities in grade five children
Creators: name: Ellis, Julia Litwintschik
Publisher: name: University of British Columbia
Year: 2010

description: The development of the instrument, Solving Real Problems: exercises in productive thinking (SRP), was prompted by the intent to design creative problem solving tasks that would be: (1) stimulating from the examinee's point of view; (2) complex; (3) logically related to creative behavior as it occurs in the examinee's "everyday world"; (4) likely to provide for qualitative indices of originality or creative thinking. To develop SRP tasks, subjects were first asked to submit examples of what they considered to be "everyday, high-interest problems" expressed in the format of "Something I want to do and why I can't do it." From a pool of problems thus obtained, tasks were selected which appeared to allow for breadth in solution approaches. Attention was also given to ensuring variety in terms of content and apparent difficulty of the problems. Examinees were asked to generate as many different solutions as they could imagine for each problem. An exploratory approach to the development of scoring protocols for the SRP was utilized in order to provide for the identification of manifestations of creativity that might be idiosyncratic to the age level of subjects in the study or to these kinds of tasks. Data collected included the SRP, an external criterion of creativity, and measures of ability and personality. Seven SRP scores were developed: Fluency, Flexibility, Wishing, Personal Capability, Fantasy Factor, Analytic Thinking, and Conceptual Thinking. Stepwise regression analyses revealed considerable overlap between the academic achievement measure and the SRP variables — Fluency, Flexibility, and Personal Capability — in predicting to performance on the external criterion. Discriminant function analyses indicated that the SRP variables, Analytic Thinking and Conceptual Thinking, were the most powerful discriminators of the Creative Group (as defined by performance on the external criterion). These two SRP variables were relatively independent of academic achievement. Convergent validity analyses involving the external criterion, the SRP variables, and case study variables supported a dual ability/personality interpretation of the SRP variables, Conceptual Thinking and Analytic Thinking. While most SRP variables provided little information beyond that available from measures of academic achievement, Conceptual Thinking and Analytic Thinking were judged to have promise for further research and development work in the measurement of creativity.
Lasianthus oligoneurus Schumann 1902
Creators: name: Napiroon, Tiwtawat
name: Chayamarit, Kongkanda
name: Dawson, Sally
name: Till, Walter
name: Balslev, Henrik
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Gentianales
Rubiaceae
Lasianthus
Lasianthus oligoneurus

description: 41. Lasianthus oligoneurus Schumann (1902:340). Type: ― THAILAND. Trat, Koh Chang island, near Lem Dan, E. J. Schmidt 390 (holotype C10018244 image!).
T hailand: ―Only known from the type collection.
Distribution: ―Endemic to Thailand (South-Eastern).
Ecology: ―Evergreen forest on Koh Chang island at elevations of 100‒ 200 m.
Notes: ― Lasianthus oligoneurus is only known from the type speciemen and the original publication. Its dominant characters are that the branches and branchlets are puberulous, the leaves are oblong and 9‒12 × 3‒4 cm, the petioles are 5‒6 mm long, the leaves have 4 pairs of secondary veins, the stipules are triangular and 3 mm long and strigillose, the drupes are trilocular, and the fresh fruits are blue.
description: Published as part of Napiroon, Tiwtawat, Chayamarit, Kongkanda, Dawson, Sally, Till, Walter & Balslev, Henrik, 2020, A synopsis of Lasianthus (Lasiantheae, Rubiaceae) in Thailand and two additional new species, pp. 1-38 in Phytotaxa 439 (1) on pages 23-24, DOI: 10.11646/phytotaxa.439.1.1, http://zenodo.org/record/13873503
Predicting Heat Propagation in Roebel Cable-based Accelerator Magnet Prototype
Creators: name: Ruuskanen, Janne
Publisher: name: Zenodo
Year: 2017
Subjects: Accelerator magnets, Finite element methods, HTS cables, Quench

description: In this thesis, quench modelling of superconducting magnets is discussed. Moreover, a simulation tool was developed for quench simulations suitable for large superconducting devices. The tool utilizes a novel numerical approach to solve three-dimensional (3-D) heat diffusion in one-dimensional (1-D) modelling domain.
Gegenbauer Goldstones
Creators: name: Durieux, Gauthier
name: McCullough, Matthew
name: Salvioni, Ennio
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate radiatively stable classes of pseudo-Nambu-Goldstone boson (pNGB) potentials for approximate spontaneously broken $\mathrm{SO}(N+1)\to\mathrm{SO}(N)$. Using both the one-loop effective action and symmetry, it is shown that a Gegenbauer polynomial potential is radiatively stable, being effectively an `eigenfunction' from a radiative perspective. In Gegenbauer pNGB models, one naturally and automatically obtains $v \propto f/n$, where $n\in 2\mathbb{Z}$ is the order of the Gegenbauer polynomial. For a Gegenbauer Higgs boson, this breaks the usual correlation between Higgs coupling corrections and `$v/f$' tuning. Based on this, we argue that to conclusively determine whether or not the Higgs is a composite pNGB in scenarios with up to $\mathcal{O}(10\%)$ fine-tuning will require going beyond both the Higgs coupling precision and heavy resonance mass reach of the High-Luminosity LHC.
description: 20 pages, 5 figures, v2: minor changes, matches the published version
Reverse Engineering the ESP32-C3 Wi-Fi Drivers for Static Worst-Case Analysis of Intermittently-Powered Systems
Creators: name: Mudraje, Ishwar
name: Vogelgesang, Kai
name: Devreker, Jasper
name: Gerhorst, Luis
name: Raffeck, Phillip
name: Wägemann, Peter
name: Herfet, Thorsten
Publisher: name: arXiv
Year: 2025
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: The Internet of Batteryless Things revolutionizes sustainable communication as it operates on harvested energy. This harvested energy is dependent on unpredictable environmental conditions; therefore, device operations, including those of its networking stack, must be resilient to power failures. Reactive intermittent computing provides an approach for solving this by notifications of impending power failures, which is implemented by monitoring the harvested energy buffered in a capacitor. However, to use this power-failure notification and guarantee forward progress, systems must break down tasks into atomic transactions that can be predictably finished before the energy runs out. Thus, static program-code analysis must determine the worst-case energy consumption (WCEC) of all transactions. In Wi-Fi-capable devices, drivers are often closed-source, which avoids the determination of WCEC bounds for transactions since static analysis requires all code along with its semantics.
 In this work, we integrate an energy-aware networking stack with reverse-engineered Wi-Fi drivers to enable full-stack WCEC analysis for physical transmission and reception of packets. Further, we extended a static worst-case analysis tool with a resource-consumption model of our Wi-Fi driver. Our evaluation with the RISC-V-based ESP32-C3 platform gives worst-case bounds with our static analysis approach for the transactions of the full communication stack, therefore showing that Wi-Fi-based reactive intermittent computing is feasible.
Interference and Outage in Clustered Wireless Ad Hoc Networks
Creators: name: Ganti, RadhaKrishna
name: Haenggi, Martin
Publisher: name: arXiv
Year: 2007
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: In the analysis of large random wireless networks, the underlying node distribution is almost ubiquitously assumed to be the homogeneous Poisson point process. In this paper, the node locations are assumed to form a Poisson clustered process on the plane. We derive the distributional properties of the interference and provide upper and lower bounds for its CCDF. We consider the probability of successful transmission in an interference limited channel when fading is modeled as Rayleigh. We provide a numerically integrable expression for the outage probability and closed-form upper and lower bounds.We show that when the transmitter-receiver distance is large, the success probability is greater than that of a Poisson arrangement. These results characterize the performance of the system under geographical or MAC-induced clustering. We obtain the maximum intensity of transmitting nodes for a given outage constraint, i.e., the transmission capacity (of this spatial arrangement) and show that it is equal to that of a Poisson arrangement of nodes. For the analysis, techniques from stochastic geometry are used, in particular the probability generating functional of Poisson cluster processes, the Palm characterization of Poisson cluster processes and the Campbell-Mecke theorem.
description: Submitted to IEEE Transactions on Information Theory
A healthier stochastic semiclassical gravity: world without Schrödinger cats
Creators: name: Diósi, Lajos
Publisher: name: arXiv
Year: 2025
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Semiclassical gravity couples classical gravity to the quantized matter in meanfield approximation. The meanfield coupling is problematic for two reasons. First, it ignores the quantum fluctuation of matter distribution. Second, it violates the linearity of the quantum dynamics. The first problem can be mitigated by allowing stochastic fluctuations of the geometry but the second problem lies deep in quantum foundations. Restoration of quantum linearity requires a conceptual approach to hybrid classical-quantum coupling. Studies of the measurement problem and the quantum-classical transition point to the solution. It is based on a postulated mechanism of spontaneous quantum monitoring plus feedback. This approach eliminates Schrödinger cat states, takes quantum fluctuations into account, and restores the linearity of quantum dynamics. Such a captivating conceptionally `healthier' semiclassical theory exists in the Newtonian limit, but its relativistic covariance hits a wall. Here we will briefly recapitulate the concept and its realization in the nonrelativistic limit. We emphasize that the long-known obstacles to the relativistic extension lie in quantum foundations.
description: 10pp, based on the author's talk at the Lema\^itre 2024 conference on Black Holes, Gravitational Waves and Space-Time Singularities (June 17-21, 2024, Castel Gandolfo, Specola Vaticana)
An ancient massive quiescent galaxy found in a gas-rich z ~ 3 group
Creators: name: Kalita, Boris S.
name: Daddi, Emanuele
name: D'Eugenio, Chiara
name: Valentino, Francesco
name: Rich, R. Michael
name: Gómez-Guijarro, Carlos
name: Coogan, Rosemary T.
name: Delvecchio, Ivan
name: Elbaz, David
name: Neill, James D.
name: Puglisi, Annagrazia
name: Strazzullo, Veronica
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Deep ALMA and HST observations reveal the presence of a quenched massive galaxy within the $z=2.91$ galaxy group RO-1001. With a mass-weighted stellar age of $1.6 \pm 0.4 \,$Gyr this galaxy is one of the oldest known at $z\sim3$, implying that most of its $10^{11}\rm \, M_{\odot}$ of stars were rapidly formed at $z>6$--8. This is a unique example of the predominantly passive evolution of a galaxy over at least $3
description: Accepted for publication in ApJL
Combining physics-based and data-driven models: advancing the frontiers of research with Scientific Machine Learning
Creators: name: Quarteroni, Alfio
name: Gervasio, Paola
name: Regazzoni, Francesco
Publisher: name: arXiv
Year: 2025
Subjects: subject: Numerical Analysis (math.NA)
subject: Machine Learning (cs.LG)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences
subject: G.1.m; I.2.6; J.2; J.6
subject: 65M60, 65M32, 76-XX, 68T07, 92B20, 92C10, 92C30

description: Scientific Machine Learning (SciML) is a recently emerged research field which combines physics-based and data-driven models for the numerical approximation of differential problems. Physics-based models rely on the physical understanding of the problem, subsequent mathematical formulation, and numerical approximation. Data-driven models instead aim to extract relations between input and output data without arguing any causality principle underlining the available data distribution. In recent years, data-driven models have been rapidly developed and popularized. Such a diffusion has been triggered by a huge availability of data, increasingly cheap computing power, and the development of powerful ML algorithms. SciML leverages the physical awareness of physics-based models and the efficiency of data-driven algorithms. With SciML, we can inject physics and mathematical knowledge into ML algorithms. Yet, we can rely on data-driven algorithms' capability to discover complex and nonlinear patterns from data and improve the descriptive capacity of physics-based models. After recalling the mathematical foundations of digital modelling and ML algorithms and presenting the most popular ML architectures, we discuss the great potential of a broad variety of SciML strategies in solving complex problems governed by PDEs. Finally, we illustrate the successful application of SciML to the simulation of the human cardiac function, a field of significant socioeconomic importance that poses numerous challenges on both the mathematical and computational fronts. Despite the robustness and accuracy of physics-based models, certain aspects, such as unveiling constitutive laws for cardiac cells and myocardial material properties, as well as devising efficient reduced order models to dominate the extraordinary computational complexity, have been successfully tackled by leveraging data-driven models.
description: 127pages. Published in Mathematical Models and Methods in Applied Sciences (2025)