cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
TraceMyFish D3.1 Handheld Sensor Prototype
Creators: name: Schultz, Nette
name: Genio, Alessia Del
name: Aske Schultz Carstensen
name: Carstensen, Jens Michael
Publisher: name: Zenodo
Year: 2023

description: The following deliverable aims at giving an overview of the planning and development process for the Videometer handheld instrument: the VideometerLite. The device, together with the image processing software, the VideometerLab Software, have been utilized, and further will, during the whole duration of the TraceMyFish (TMF) project for the gathering, processing, and analyzing of data.
 After an initial introduction to Workpackage 3, the second Chapter of the Deliverable gives a detailed introduction to the Videometer Spectral Imaging technology and to the software’s functionalities and tools. Chapter 3 revolves around the instrument’s concept of a portable, wireless, easy-to-use device. Chapter 4 and 5 further develop this notion, respectively expanding on the iterative process undertaken for the design of the device, and the first iteration of the development process. To satisfy customer needs as efficiently as possible, it was necessary to create a cross-functional team of developers, including mechanics, optics, hardware and software engineers, marketing specialists, executives and the users themselves. The 6th Chapter of the Deliverable focuses on user testing and the feedback received after the first iteration of the design process. Users were overall satisfied with the instrument and showed the need for further expansion of UV wavelengths. Chapter 7, indeed, depicts how the user’s input drove the second iteration of the instrument’s design process. Additional wavelengths were added, and the Videometer Cloud Workspaces were developed for the saving, managing and sharing of data. Finally, Chapter 8 serves as a manual for the use of the instrument, software and cloud integration as a unique system, that allows for advanced image capturing, processing and analysis. Tools such as the transformation builder, segmentation builder, BLOB tool and Cloud Workspace give the user the unique possibility for combining spectral imaging, machine learning, multivariate statistics with their product’s needs.
Finite temperature quantum noise correlations as a probe for topological helical edge modes
Creators: name: Mishra, Sachiraj
name: Benjamin, Colin
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Applied Physics (physics.app-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The distinction between chiral, trivial helical, and topological helical edge modes can be effectively made using quantum noise measurements at finite temperatures. Quantum noise measurements consist of mainly two components. The first is thermal noise, whose provenance is thermal fluctuations, and the second is shot noise, whose origin is the quantum nature of charge particles. Studying these edge modes at finite temperatures is important as it more accurately reflects the conditions in real-world experiments. Additionally, we have verified that our results for finite temperature quantum noise correlations are valid at finite frequencies too.
description: 33 pages, 17 figures, accepted for publication in Phys. Rev. B
Spectroscopy of Hyades L dwarf candidates
Creators: name: Lodieu, N.
name: Boudreault, S.
name: Bejar, V. J. S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the results of photometric, astrometric, and spectroscopic follow-up of L dwarf candidates identified in the Hyades cluster by Hogan et al. (2008). We obtained low-resolution optical spectroscopy with the OSIRIS spectrograph on the Gran Telescopio de Canarias for all 12 L dwarf candidates as well as new J-band imaging for a subsample of eight to confirm their proper motion. We also present mid-infrared photometry from the Wise Field Infrared Survey Explorer (WISE) for the Hyades L and T dwarf candidates and estimate their spectroscopic distances, effective temperatures, and masses. We confirm the cool nature of several L dwarf candidates and confirm astrometrically their membership, bridging the gap between the coolest M dwarfs and the two T dwarfs previously reported in the Hyades cluster. These members represent valuable spectral templates at an age of 625 Myr and slightly super solar metallicity (Fe/H=+0.13). We update the Hyades mass function across the hydrogen-burning limit and in the substellar regime. We confirm a small number numbers of very-low-mass members below ~0.1 Msun belonging to the Hyades cluster.
description: 12 pages, 7 figures, 3 tables; accepted for publication in MNRAS
The synthesis and analysis of zwitterionic surfactants: understanding the relationship between molecular architecture, self-assembly and other properties
Creators: name: KELLEPPAN, VEENA TARANI
Publisher: name: Monash University
Year: 2023
Subjects: Colloid and surface chemistry

description: Surfactants or surface active agents have unique properties and are therefore widely used, with examples extending from personal care products to industrial products. Their amphiphilicity enables to them adsorb at interfaces and self-assemble in solutions. The molecular structure of surfactants dictates the function and application of these molecules. The central focus of this thesis was the development, synthesis and analysis of novel zwitterionic surfactant molecules. The concepts presented concentrate on new developments regarding the classes of molecules studied, amidopropyl betaines (APBs) and amide amino acid surfactants. This provides new insight into structure-function relationships based on the architecture of these molecules, aids in development of formulations in industry and guides future surfactant design. Sustainability and environmental concerns were discussed throughout this work.
Edge-colorings of $K_{m,n}$ which Forbid Multicolored Cycles
Creators: name: Fu, Hung-Lin
name: Lo, Yuan-Hsun
name: Pei, Ryo-Yu
Publisher: name: arXiv
Year: 2014
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05B15, 05C15, 05C38

description: A subgraph in an edge-colored graph is multicolored if all its edges receive distinct colors. In this paper, we study the proper edge-colorings of the complete bipartite graph $K_{m,n}$ which forbid multicolored cycles. Mainly, we prove that (1) for any integer $k\geq 2$, if $n\geq 5k-6$, then any properly $n$-edge-colored $K_{k,n}$ contains a multicolored $C_{2k}$, and (2) determine the order of the properly edge-colored complete bipartite graphs which forbid multicolored $C_6$.
description: 8 pages, 6 figures
Optimization of indirect magnetoelectric effect in thin-film/substrate/piezoelectric-actuator heterostructure using polymer substrate
Creators: name: Gueye, Mouhamadou
name: Zighem, Fatih
name: Faurie, Damien
name: Belmeguenai, Mohamed
name: Mercone, Silvana
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Indirect magnetoelectric effect has been studied in magnetostrictive-film/substrate/piezoelectric-actuator heterostructures. Two different substrates have been employed: a flexible substrate (Young's modulus of 4 GPa) and a rigid one (Young's modulus of 180 GPa). A clear optimization of the indirect magnetoelectric coupling, studied by micro-strip ferromagnetic resonance, has been highlighted when using the polymer substrate. However, in contrast to the rigid substrate, the flexible substrate also leads to an a priori undesirable and huge uniaxial anisotropy which seems to be related to a non equibiaxial residual stress inside the magnetostrictive film. The strong amplitude of this non equibiaxiallity is due to the large Young's modulus mismatch between the polymer and the magnetostrictive film which leads to a slight curvature along a given direction during the elaboration process and thus to a large magnetoelastic anisotropy.
description: 4 pages, 4 figures
Spin State Disproportionation in Insulating Ferromagnetic LaCoO3 Epitaxial Thin Films
Creators: name: Chen, Shanquan
name: Chang, Jhong-Yi
name: Zhang, Qinghua
name: Li, Qiuyue
name: Lin, Ting
name: Meng, Fanqi
name: Huang, Haoliang
name: Zeng, Shengwei
name: Yin, Xinmao
name: Duong, My Ngoc
name: Lu, Yalin
name: Chen, Lang
name: Guo, Er-Jia
name: Chen, Hanghui
name: Chang, Chun-Fu
name: Kuo, Chang-Yang
name: Chen, Zuhuang
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The origin of insulating ferromagnetism in epitaxial LaCoO3 films under tensile strain remains elusive despite extensive research efforts have been devoted. Surprisingly, the spin state of its Co ions, the main parameter of its ferromagnetism, is still to be determined. Here, we have systematically investigated the spin state in epitaxial LaCoO3 thin films to clarify the mechanism of strain induced ferromagnetism using element-specific x-ray absorption spectroscopy and dichroism. Combining with the configuration interaction cluster calculations, we unambiguously demonstrate that Co3+ in LaCoO3 films under compressive strain (on LaAlO3 substrate) are practically a low spin state, whereas Co3+ in LaCoO3 films under tensile strain (on SrTiO3 substrate) have mixed high spin and low spin states with a ratio close to 1:3. From the identification of this spin state ratio, we infer that the dark strips observed by high-resolution scanning transmission electron microscopy indicate the position of Co3+ high spin state, i.e., an observation of a spin state disproportionation in tensile-strained LaCoO3 films. This consequently explains the nature of ferromagnetism in LaCoO3 films.
Dimensionality Reduction for Improving Out-of-Distribution Detection in Medical Image Segmentation
Creators: name: Woodland, McKell
name: Patel, Nihil
name: Taie, Mais Al
name: Yung, Joshua P.
name: Netherton, Tucker J.
name: Patel, Ankit B.
name: Brock, Kristy K.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Clinically deployed segmentation models are known to fail on data outside of their training distribution. As these models perform well on most cases, it is imperative to detect out-of-distribution (OOD) images at inference to protect against automation bias. This work applies the Mahalanobis distance post hoc to the bottleneck features of a Swin UNETR model that segments the liver on T1-weighted magnetic resonance imaging. By reducing the dimensions of the bottleneck features with principal component analysis, OOD images were detected with high performance and minimal computational load.
description: This preprint has not undergone peer review or any post-submission improvements or corrections. The Version of Record of this contribution is published in the proceedings of UNSURE 2023, Lecture Notes in Computer Science, vol 14291, and is available online at https://doi.org/10.1007/978-3-031-44336-7_15
Population Inversion in Monolayer and Bilayer Graphene
Creators: name: Gierz, Isabella
name: Mitrano, Matteo
name: Petersen, Jesse C.
name: Cacho, Cephise
name: Turcu, I. C. Edmond
name: Springate, Emma
name: Stöhr, Alexander
name: Köhler, Axel
name: Starke, Ulrich
name: Cavalleri, Andrea
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The recent demonstration of saturable absorption and negative optical conductivity in the Terahertz range in graphene has opened up new opportunities for optoelectronic applications based on this and other low dimensional materials. Recently, population inversion across the Dirac point has been observed directly by time- and angle-resolved photoemission spectroscopy (tr-ARPES), revealing a relaxation time of only ~ 130 femtoseconds. This severely limits the applicability of single layer graphene to, for example, Terahertz light amplification. Here we use tr-ARPES to demonstrate long-lived population inversion in bilayer graphene. The effect is attributed to the small band gap found in this compound. We propose a microscopic model for these observations and speculate that an enhancement of both the pump photon energy and the pump fluence may further increase this lifetime.
description: 18 pages, 6 figures
Geometrical frustration and incommensurate magnetic order in Na$_3$RuO$_4$ with two triangular motifs
Creators: name: Bader, Vera P.
name: Ritter, Clemens
name: Papke, Elias
name: Gegenwart, Philipp
name: Tsirlin, Alexander A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Incommensurate magnetic order in the spin-3/2 antiferromagnet Na$_3$RuO$_4$ is uncovered by neutron diffraction combined with ab initio calculations. The crystal structure of Na$_3$RuO$_4$ contains two triangular motifs on different length scales. The magnetic Ru$^{5+}$ ions form a lozenge (diamond) configuration, with tetramers composed of two isosceles triangles. These tetramers are further arranged in layers, such that an effective triangular lattice is formed. The tetramers are nearly antiferromagnetic but frustration between them leads to an incommensurately modulated magnetic structure described by the propagation vector $\vec{k}=(0.242(1), 0, 0.313(1))$. We show that the long-range Ru-O-O-Ru couplings between the tetramers play a major role in Na$_3$RuO$_4$ and suggest an effective description in terms of the spatially anisotropic triangular lattice if the tetramers are treated as single sites.
description: 8 pages, 8 figures; published version
QCD equation of state at finite chemical potential from unbiased exponential resummation of the lattice QCD Taylor series
Creators: name: Mitra, Sabarnya
name: Hegde, Prasad
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Exponential resummation of the QCD finite-density Taylor series has been recently introduced as an alternative way of resumming the finite-density lattice QCD Taylor series. Unfortunately the usual exponential resummation formula suffers from stochastic bias which must be subtracted before identifying genuine higher-order contributions. In this paper, we present a new way of subtracting the stochastic bias at the level of each individual gauge configuration, up to a certain order of either the Taylor series or the cumulant expansion, by modifying the argument of the exponential. Retaining the exponential form of the resummation allows us to also calculate the phase factor of the fermion determinant on each gauge configuration. We present our results for the excess pressure, number density, and the average phase factor and show that the new results contain less stochastic bias and are in better agreement with the QCD Taylor series compared to the previous exponential resummation.
description: 11 pages, 17 figures
Mixed Gated/Exhaustive Service in a Polling Model with Priorities
Creators: name: Boon, Marko
name: Adan, Ivo
Publisher: name: arXiv
Year: 2014
Subjects: subject: Probability (math.PR)
subject: Performance (cs.PF)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: In this paper we consider a single-server polling system with switch-over times. We introduce a new service discipline, mixed gated/exhaustive service, that can be used for queues with two types of customers: high and low priority customers. At the beginning of a visit of the server to such a queue, a gate is set behind all customers. High priority customers receive priority in the sense that they are always served before any low priority customers. But high priority customers have a second advantage over low priority customers. Low priority customers are served according to the gated service discipline, i.e. only customers standing in front of the gate are served during this visit. In contrast, high priority customers arriving during the visit period of the queue are allowed to pass the gate and all low priority customers before the gate. We study the cycle time distribution, the waiting time distributions for each customer type, the joint queue length distribution of all priority classes at all queues at polling epochs, and the steady-state marginal queue length distributions for each customer type. Through numerical examples we illustrate that the mixed gated/exhaustive service discipline can significantly decrease waiting times of high priority jobs. In many cases there is a minimal negative impact on the waiting times of low priority customers but, remarkably, it turns out that in polling systems with larger switch-over times there can be even a positive impact on the waiting times of low priority customers.
Manipulating the Quasi-Normal Modes of Radially Symmetric Resonators
Creators: name: Capers, James R
name: Patient, Dean A
name: Horsley, Simon A R
Publisher: name: arXiv
Year: 2023
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We derive two methods for simultaneously controlling the resonance frequency, linewidth and multipolar nature of the resonances of radially symmetric structures. Firstly, we formulate an eigenvalue problem for a global shift in the permittivity of the structure to place a resonance at a particular complex frequency. Next, we employ quasi-normal mode perturbation theory to design radially graded structures with resonances at desired frequencies.
Doctoral thesis recital (voice (tenor))
Creators: name: Oh, Jungrok
Publisher: name: The University of Texas at Austin
Year: 2022
Subjects: Songs (High voice) with piano
Oratorios--Excerpts, Arranged

description: Messiah. Comfort ye, my people ; Every valley shall be exalted / Handel -- 5 Korean art songs -- 3 songs / Respighi -- Encore
Moving Culturally Relevant Pedagogy From Theory to Practice: Exploring Teachers’ Application of Culturally Relevant Education in Science and Mathematics
Creators: name: Brown, BA
name: Boda, P
name: Lemmi, C
name: Monroe, X
Publisher: name: University of Illinois at Chicago
Year: 2023
Subjects: Uncategorized

description: This article reports on urban elementary teachers’ understandings of cultural relevancy and the practices they enacted after a professional development on culturally relevant education (CRE) and cognitive apprenticeship. Focus group interviews support that participating teachers understood some principles of CRE but did not always match the theory to practice before our professional development. After training, video data of teaching support that this divide was mediated. These findings point to a need to engage in explicit theory-to-practice research about cultural relevancy in urban science, technology, engineering, and mathematics (STEM) teaching. Implications are provided relating to teachers planning lessons purposefully to infuse cultural relevancy into their STEM classrooms.
Incommensurate antiferromagnetic order in the manifoldly-frustrated SrTb$_2$O$_4$ with transition temperature up to 4.28 K
Creators: name: Li, Hai-Feng
name: Zhang, Cong
name: Senyshyn, Anatoliy
name: Wildes, Andrew
name: Schmalzl, Karin
name: Schmidt, Wolfgang
name: Boehm, Martin
name: Ressouche, Eric
name: Hou, Binyang
name: Meuffels, Paul
name: Roth, Georg
name: Brueckel, Thomas
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The N$\acute{\rm e}$el temperature of the new frustrated family of Sr\emph{RE}$_2$O$_4$ (\emph{RE} = rare earth) compounds is yet limited to $\sim$ 0.9 K, which more or less hampers a complete understanding of the relevant magnetic frustrations and spin interactions. Here we report on a new frustrated member to the family, SrTb$_2$O$_4$ with a record $T_{\rm N}$ = 4.28(2) K, and an experimental study of the magnetic interacting and frustrating mechanisms by polarized and unpolarized neutron scattering. The compound SrTb$_2$O$_4$ displays an incommensurate antiferromagnetic (AFM) order with a transverse wave vector \textbf{Q}$^{\rm 0.5 K}_{\rm AFM}$ = (0.5924(1), 0.0059(1), 0) albeit with partially-ordered moments, 1.92(6) $μ_{\rm B}$ at 0.5 K, stemming from only one of the two inequivalent Tb sites mainly by virtue of their different octahedral distortions. The localized moments are confined to the \emph{bc} plane, 11.9(66)$^\circ$ away from the \emph{b} axis probably by single-ion anisotropy. We reveal that this AFM order is dominated mainly by dipole-dipole interactions and disclose that the octahedral distortion, nearest-neighbour (NN) ferromagnetic (FM) arrangement, different next NN FM and AFM configurations, and in-plane anisotropic spin correlations are vital to the magnetic structure and associated multiple frustrations. The discovery of the thus far highest AFM transition temperature renders SrTb$_2$O$_4$ a new friendly frustrated platform in the family for exploring the nature of magnetic interactions and frustrations.
description: 19 pages, 8 Figures, 1 Table
Systematic determination of coupling constants in spin clusters from broken-symmetry mean-field solutions
Creators: name: Tabrizi, Shadan Ghassemi
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Quantum-chemical calculations aimed at deriving magnetic coupling constants in exchange-coupled spin clusters commonly utilize a broken-symmetry (BS) approach. This involves calculating several distinct collinear spin configurations, predominantly by density-functional theory (DFT). The energies of these configurations are interpreted in terms of the Heisenberg model to determine coupling constants for spin pairs. However, this energy-based procedure has inherent limitations, primarily in its inability to provide information on isotropic spin interactions beyond those included in the Heisenberg model. Biquadratic exchange or multi-center terms, for example, are usually inaccessible and hence assumed to be negligible. The present work introduces a novel approach employing BS mean-field solutions, specifically Hartree-Fock wave functions, for the construction of effective spin Hamiltonians. This expanded method facilitates the extraction of a broader range of coupling parameters by considering not only the energies, but also Hamiltonian and overlap elements between different BS states. We demonstrate how comprehensive s = 1/2 Hamiltonians, including multi-center terms, can be straightforwardly constructed from a complete set of BS solutions. The approach is exemplified for small clusters within the context of the half-filled single-band Hubbard model. This allows to contrast the current strategy against exact results, thereby offering an enriched understanding of the spin-Hamiltonian construction from BS solutions.
description: 37 pages, 11 figure
Jet outflow and gamma-ray emission correlations in S5 0716+714
Creators: name: Rani, B.
name: Krichbaum, T. P.
name: Marscher, A. P.
name: Jorstad, S. G.
name: Hodgson, J. A.
name: Fuhrmann, L.
name: Zensus, J. A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Using millimeter-very long baseline interferometry (VLBI) observations of the BL Lac object S5 0716+714 from August 2008 to September 2013, we investigate variations in the core flux density and orientation of the sub-parsec scale jet i.e. position angle. The gamma-ray data obtained by the Fermi-LAT (Large Area Telescope) are used to investigate the high-energy flux variations over the same time period. For the first time in any blazar, we report a significant correlation between the gamma-ray flux variations and the position angle (PA) variations in the VLBI jet. The cross-correlation analysis also indicates a positive correlation such that the mm-VLBI core flux density variations are delayed with respect to the gamma-ray flux by 82$\pm$32 days. This suggests that the high-energy emission is coming from a region located $\geq$(3.8$\pm$1.9) parsecs upstream of the mm-VLBI core (closer to the central black hole). These results imply that the observed inner jet morphology has a strong connection with the observed gamma-ray flares.
description: 5 pages, 6 figures, accepted for publication in A&A Letters
The Effects of Stress Conditions onAntibacterial Activities of Zanthoxylumrhetsa Fruit Extract
Creators: name: Arunporn Itharat
Publisher: name: กองบริหารการวิจัย
Year: 2020
Subjects: Stress test
Antibacterial activity
Zanthoxylum rhetsa fruit extract
Ma-kwaen

description: Science & Technology Asia, 25, 3, 127-130
Reveal the Unknown: Out-of-Knowledge-Base Mention Discovery with Entity Linking
Creators: name: Dong, Hang
name: Chen, Jiaoyan
name: He, Yuan
name: Liu, Yinan
name: Horrocks, Ian
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences
subject: I.2.7

description: Discovering entity mentions that are out of a Knowledge Base (KB) from texts plays a critical role in KB maintenance, but has not yet been fully explored. The current methods are mostly limited to the simple threshold-based approach and feature-based classification, and the datasets for evaluation are relatively rare. We propose BLINKout, a new BERT-based Entity Linking (EL) method which can identify mentions that do not have corresponding KB entities by matching them to a special NIL entity. To better utilize BERT, we propose new techniques including NIL entity representation and classification, with synonym enhancement. We also apply KB Pruning and Versioning strategies to automatically construct out-of-KB datasets from common in-KB EL datasets. Results on five datasets of clinical notes, biomedical publications, and Wikipedia articles in various domains show the advantages of BLINKout over existing methods to identify out-of-KB mentions for the medical ontologies, UMLS, SNOMED CT, and the general KB, WikiData.
description: 11 pages, 3 figures, accepted for CIKM 2023
Energy dependence of proton-proton elastic scattering at large momentum transfer
Creators: name: Ferreira, Erasmo
name: Kohara, Anderson Kendi
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The measurements of proton-proton elastic scattering for large momentum transfer at energies in the range $\approx$ 20 to 60 GeV show a simple behaviour of form $d σ/dt \approx {\rm const}~|t|^{-8}$, apparently with no energy dependence. In the present work detailed analysis of the data shows a decrease of the magnitude of the tail with the energy, still with preservation of the power $|t|^{-8}$. The analysis allows the definition of a band for the energy dependence with the form of a power of the strong coupling $α_S^{1.57}$. The rate of decrease describes very well the data at the distant energy $\sqrt{s}$ = 13 TeV, with reduction of the cross section by a factor 5.71. This result gives prediction for new experiments at high energies, and opens important question for theoretical investigation.
description: 6 pages, 5 figures and 1 table
Chemical and kinematical properties of Galactic bulge stars surrounding the stellar system Terzan 5
Creators: name: Massari, Davide
name: Mucciarelli, A.
name: Ferraro, F. R.
name: Origlia, L.
name: Rich, R. M.
name: Lanzoni, B.
name: Dalessandro, E.
name: Ibata, R.
name: Lovisi, L.
name: Bellazzini, M.
name: Reitzel, D.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: As part of a study aimed at determining the kinematical and chemical properties of Terzan 5, we present the first characterization of the bulge stars surrounding this puzzling stellar system. We observed 615 targets located well beyond the tidal radius of Terzan 5 and we found that their radial velocity distribution is well described by a Gaussian function peaked at =+21.0\pm4.6 km/s and with dispersion sigma_v=113.0\pm2.7 km/s. This is the one of the few high-precision spectroscopic survey of radial velocities for a large sample of bulge stars in such a low and positive latitude environment (b=+1.7°). We found no evidence for the peak at \sim+200 km/s found in Nidever et al. 2012. The strong contamination of many observed spectra by TiO bands prevented us from deriving the iron abundance for the entire spectroscopic sample, introducing a selection bias. The metallicity distribution was finally derived for a sub-sample of 112 stars in a magnitude range where the effect of the selection bias is negligible. The distribution is quite broad and roughly peaked at solar metallicity ([Fe/H]\simeq+0.05 dex) with a similar number of stars in the super-solar and in the sub-solar ranges. The population number ratios in different metallicity ranges agree well with those observed in other low-latitude bulge fields suggesting (i) the possible presence of a plateau for |b|<4° for the ratio between stars in the super-solar (0
description: 27 pages, 9 figures, accepted for publication by ApJ
Spin wave Hamiltonian and anomalous scattering in NiPS$_3$
Creators: name: Scheie, A.
name: Park, Pyeongjae
name: Villanova, J. W.
name: Granroth, G. E.
name: Sarkis, C. L.
name: Zhang, Hao
name: Stone, M. B.
name: Park, Je-Geun
name: Okamoto, S.
name: Berlijn, T.
name: Tennant, D. A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report a comprehensive spin wave analysis of the semiconducting honeycomb van der Waal antiferromagnet NiPS$_3$. Using single crystal inelastic neutron scattering, we map out the full Brillouin zone and fit the observed modes to a spin wave model with rigorously defined uncertainty. We find that the third neighbor exchange $J_3$ dominates the Hamiltonian, a feature which we fully account for by ab-initio density functional theory calculations. We also quantify the degree to which the three-fold rotation symmetry is broken and account for the $Q=0$ excitations observed in other measurements, yielding a spin exchange model which is consistent across multiple experimental probes. We also identify a strongly reduced static ordered moment and reduced low-energy intensity relative to the linear spin wave calculations, signaling unexplained features in the magnetism which requires going beyond the linear spin wave approximation.
description: 7 pages, 8 figures; 8 pages and 10 additional figures of appendices
Dense and single-phase KTaO$_{3}$ ceramics obtained by spark plasma sintering
Creators: name: Féger, L.
name: Giovannelli, F.
name: Vats, G.
name: Alves, J.
name: Pignon, B.
name: Salje, E. K. H.
name: Monot-Laffez, I.
name: Nataf, G. F.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Potassium tantalate (KTaO$_{3}$) is a promising material for dielectric applications at low temperature. However, dense and single-phase ceramics cannot be obtained by conventional sintering because of the evaporation of potassium that leads to secondary phases. Here, we demonstrate that spark plasma sintering is a suitable method to obtain dense and single-phase KTaO$_{3}$ ceramics, by optimizing three parameters: initial composition, temperature, and pressure. A 2 mol% K-excess in the precursors leads to a large grain growth and dense single-phase ceramics. Without K-excess, a small amount of secondary phase (K$_{6}$Ta$_{10.8}$O$_{30}$) is observed at the surface but can be removed by polishing. At 10 K, the dielectric permittivity is 4 times higher in the ceramic from the 2 mol% K-excess powder, because of the larger grain size. The thermal conductivity decreases with decreasing grain size and stays above the thermal conductivity of KNbO$_{3}$ ceramics.
description: to be published in Journal of the European Ceramic Society
Statistics of remote regions of networks
Creators: name: Oliveira, J. G.
name: Dorogovtsev, S. N.
name: Mendes, J. F. F.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: We delve into the statistical properties of regions within complex networks that are distant from vertices with high centralities, such as hubs or highly connected clusters. These remote regions play a pivotal role in shaping the asymptotic behaviours of various spreading processes and the features of associated spectra. We investigate the probability distribution $P_{\geq m}(s)$ of the number $s$ of vertices located at distance $m$ or beyond from a randomly chosen vertex in an undirected network. Earlier, this distribution and its large $m$ asymptotics $1/s^2$ were obtained theoretically for undirected uncorrelated networks [S. N. Dorogovtsev, J. F. F. Mendes, A. N. Samukhin, Nucl. Phys. B 653 (2003) 307]. Employing numerical simulations and analysing empirical data, we explore a wide range of real undirected networks and their models, including trees and loopy networks, and reveal that the inverse square law is valid even for networks with strong correlations. We observe this law in the networks demonstrating the small-world effect and containing vertices with degree $1$ (so-called leaves or dead ends). We find the specific classes of networks for which this law is not valid. Such networks include the finite-dimensional networks and the networks embedded in finite-dimensional spaces. We notice that long chains of nodes in networks reduce the range of $m$ for which the inverse square law can be spotted. Interestingly, we detect such long chains in the remote regions of the undirected projection of a large Web domain.
description: 13 pages, 10 figures, 2 tables, 1 ancillary file
Fully dynamic clustering and diversity maximization in doubling metrics
Creators: name: Pellizzoni, Paolo
name: Pietracaprina, Andrea
name: Pucci, Geppino
Publisher: name: arXiv
Year: 2023
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Computer and information sciences

description: We present approximation algorithms for some variants of center-based clustering and related problems in the fully dynamic setting, where the pointset evolves through an arbitrary sequence of insertions and deletions. Specifically, we target the following problems: $k$-center (with and without outliers), matroid-center, and diversity maximization. All algorithms employ a coreset-based strategy and rely on the use of the cover tree data structure, which we crucially augment to maintain, at any time, some additional information enabling the efficient extraction of the solution for the specific problem. For all of the aforementioned problems our algorithms yield $(α+\varepsilon)$-approximations, where $α$ is the best known approximation attainable in polynomial time in the standard off-line setting (except for $k$-center with $z$ outliers where $α= 2$ but we get a $(3+\varepsilon)$-approximation) and $\varepsilon>0$ is a user-provided accuracy parameter. The analysis of the algorithms is performed in terms of the doubling dimension of the underlying metric. Remarkably, and unlike previous works, the data structure and the running times of the insertion and deletion procedures do not depend in any way on the accuracy parameter $\varepsilon$ and, for the two $k$-center variants, on the parameter $k$. For spaces of bounded doubling dimension, the running times are dramatically smaller than those that would be required to compute solutions on the entire pointset from scratch. To the best of our knowledge, ours are the first solutions for the matroid-center and diversity maximization problems in the fully dynamic setting.
Jet formation in GRBs: A semi-analytic model of MHD flow in Kerr geometry with realistic plasma injection
Creators: name: Globus, Noemie
name: Levinson, Amir
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We construct a semi-analytic model for MHD flows in Kerr geometry, that incorporates energy loading via neutrino annihilation on magnetic field lines threading the horizon. We compute the double-flow structure for a wide range of energy injection rates, and identify the different operation regimes. At low injection rates the outflow is powered by the spinning black hole via the Blandford-Znajek mechanism, whereas at high injection rates it is driven by the pressure of the plasma deposited on magnetic field lines. In the intermediate regime both processes contribute to the outflow formation. The parameter that quantifies the load is the ratio of the net power injected below the stagnation radius and the maximum power that can be extracted magnetically from the black hole.
description: 17 pages, 8 figures, submitted to ApJ
Differences in Grip Strength amongWheelchair Basketball Athletes: Variationsby Hand Size and Handrim-Tire Diameter
Creators: name: Patcharee Kooncumchoo
Publisher: name: กองบริหารการวิจัย
Year: 2020
Subjects: Hand size
Wheelchair basketball
Handrim
Handrim-tire distance
Grip strength

description: Science & Technology Asia, 25, 3, 141-151
A Hybrid Quantum-Classical Method for Electron-Phonon Systems
Creators: name: Denner, M. Michael
name: Miessen, Alexander
name: Yan, Haoran
name: Tavernelli, Ivano
name: Neupert, Titus
name: Demler, Eugene
name: Wang, Yao
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Interactions between electrons and phonons play a crucial role in quantum materials. Yet, there is no universal method that would simultaneously accurately account for strong electron-phonon interactions and electronic correlations. By combining methods of the variational quantum eigensolver and the variational non-Gaussian solver, we develop a hybrid quantum-classical algorithm suitable for this type of correlated systems. This hybrid method tackles systems with arbitrarily strong electron-phonon coupling without increasing the number of required qubits and quantum gates, as compared to purely electronic models. We benchmark the new method by applying it to the paradigmatic Hubbard-Holstein model at half filling, and show that it correctly captures the competition between charge density wave and antiferromagnetic phases, quantitatively consistent with exact diagonalization.
description: 8 pages, 4 figures; 4 pages Supplemental Material
Approaches to lowering the cost of large space telescopes
Creators: name: Douglas, Ewan S
name: Aldering, Greg
name: Allan, Greg W.
name: Anche, Ramya
name: Angel, Roger
name: Ard, Cameron C.
name: Chakrabarti, Supriya
name: Close, Laird M.
name: Derby, Kevin
name: Edelstein, Jerry
name: Ford, John
name: Gersh-Range, Jessica
name: Haffert, Sebastiaan Y.
name: Ingraham, Patrick J.
name: Kang, Hyukmo
name: Kelly, Douglas M.
name: Kim, Daewook
name: Lesser, Michael
name: Leisenring, Jarron M.
name: Lin, Yu-Chia
name: Males, Jared R.
name: Martin, Buddy
name: Payan, Bianca Alondra
name: M., Sai Krishanth P.
name: Rubin, David
name: Selznick, Sanford
name: Van Gorkom, Kyle
name: Jannuzi, Buell T.
name: Perlmutter, Saul
Publisher: name: arXiv
Year: 2023
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: New development approaches, including launch vehicles and advances in sensors, computing, and software, have lowered the cost of entry into space, and have enabled a revolution in low-cost, high-risk Small Satellite (SmallSat) missions. To bring about a similar transformation in larger space telescopes, it is necessary to reconsider the full paradigm of space observatories. Here we will review the history of space telescope development and cost drivers, and describe an example conceptual design for a low cost 6.5 m optical telescope to enable new science when operated in space at room temperature. It uses a monolithic primary mirror of borosilicate glass, drawing on lessons and tools from decades of experience with ground-based observatories and instruments, as well as flagship space missions. It takes advantage, as do large launch vehicles, of increased computing power and space-worthy commercial electronics in low-cost active predictive control systems to maintain stability. We will describe an approach that incorporates science and trade study results that address driving requirements such as integration and testing costs, reliability, spacecraft jitter, and wavefront stability in this new risk-tolerant "LargeSat" context.
description: Presented at SPIE, Optics+Photonics 2023, Astronomical Optics: Design, Manufacture, and Test of Space and Ground Systems IV in San Diego, CA, USA. Minor typos corrected and DOI added 2023 Oct 19th
Testable uniqueness conditions for empirical assessment of undersampling levels in total variation-regularized x-ray CT
Creators: name: Jørgensen, Jakob S.
name: Kruschel, Christian
name: Lorenz, Dirk A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Optimization and Control (math.OC)
subject: Information Theory (cs.IT)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: We study recoverability in fan-beam computed tomography (CT) with sparsity and total variation priors: how many underdetermined linear measurements suffice for recovering images of given sparsity? Results from compressed sensing (CS) establish such conditions for, e.g., random measurements, but not for CT. Recoverability is typically tested by checking whether a computed solution recovers the original. This approach cannot guarantee solution uniqueness and the recoverability decision therefore depends on the optimization algorithm. We propose new computational methods to test recoverability by verifying solution uniqueness conditions. Using both reconstruction and uniqueness testing we empirically study the number of CT measurements sufficient for recovery on new classes of sparse test images. We demonstrate an average-case relation between sparsity and sufficient sampling and observe a sharp phase transition as known from CS, but never established for CT. In addition to assessing recoverability more reliably, we show that uniqueness tests are often the faster option.
description: 18 pages, 7 figures, submitted
Making Applications Faster by Asynchronous Execution: Slowing Down Processes or Relaxing MPI Collectives
Creators: name: Afzal, Ayesha
name: Hager, Georg
name: Markidis, Stefano
name: Wellein, Gerhard
Publisher: name: arXiv
Year: 2023
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Performance (cs.PF)
subject: FOS: Computer and information sciences

description: Comprehending the performance bottlenecks at the core of the intricate hardware-software interactions exhibited by highly parallel programs on HPC clusters is crucial. This paper sheds light on the issue of automatically asynchronous MPI communication in memory-bound parallel programs on multicore clusters and how it can be facilitated. For instance, slowing down MPI processes by deliberate injection of delays can improve performance if certain conditions are met. This leads to the counter-intuitive conclusion that noise, independent of its source, is not always detrimental but can be leveraged for performance improvements. We employ phase-space graphs as a new tool to visualize parallel program dynamics. They are useful in spotting certain patterns in parallel execution that will easily go unnoticed with traditional tracing tools. We investigate five different microbenchmarks and applications on different supercomputer platforms: an MPI-augmented STREAM Triad, two implementations of Lattice-Boltzmann fluid solvers, and the LULESH and HPCG proxy applications.
description: 18 pages, 14 figures, 7 tables. Corrected Fig. 4 layout
"An Adapt-or-Die Type of Situation": Perception, Adoption, and Use of Text-To-Image-Generation AI by Game Industry Professionals
Creators: name: Vimpari, Veera
name: Kultima, Annakaisa
name: Hämäläinen, Perttu
name: Guckelsberger, Christian
Publisher: name: arXiv
Year: 2023
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Text-to-image generation (TTIG) models, a recent addition to creative AI, can generate images based on a text description. These models have begun to rival the work of professional creatives, and sparked discussions on the future of creative work, loss of jobs, and copyright issues, amongst other important implications. To support the sustainable adoption of TTIG, we must provide rich, reliable and transparent insights into how professionals perceive, adopt and use TTIG. Crucially though, the public debate is shallow, narrow and lacking transparency, while academic work has focused on studying the use of TTIG in a general artist population, but not on the perceptions and attitudes of professionals in a specific industry. In this paper, we contribute a qualitative, exploratory interview study on TTIG in the Finnish videogame industry. Through a Template Analysis on semi-structured interviews with 14 game professionals, we reveal 12 overarching themes, structured into 49 sub-themes on professionals' perception, adoption and use of TTIG systems in games industry practice. Experiencing (yet another) change of roles and creative processes, our participants' reflections can inform discussions within the industry, be used by policymakers to inform urgently needed legislation, and support researchers in games, HCI and AI to support the sustainable, professional use of TTIG to benefit people and games as cultural artefacts.
description: 34 pages (incl. appendix), 3 figures, 4 tables. Coding template (31 pages, 10 tables), study invitations (email, social media) and pre-study survey provided as supplementary (ancillary) material. Accepted at ACM CHI Play 2023
Low-cost commercial LEGO platform for mobile robotics
Creators: name: Cuevas, Erik
name: Zaldivar, Daniel
name: Perez, Marco
Publisher: name: arXiv
Year: 2014
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: This paper shows the potential of a Lego\c{opyright} based low-cost commercial robotic platform for learning and testing prototypes in higher education and research. The overall setup aims to explain mobile robotic issues strongly related to several fields such as Mechatronics, Robotics, and Automatic Control theory. The capabilities and limitations of LEGO robots are studied within two projects. The first one involves a robotic vehicle which is able to follow several predefined paths. The second project concerns to the classical problem of position control. Algorithms and additional tools have been fully designed, applied and documented with results shown throughout the paper. The platform is found to be suitable for teaching and researching on key issues related to the aforementioned fields.
description: 10 Pages