cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Models of cuspy triaxial stellar systems. IV: Rotating systems
Creators: name: Carpintero, D. D.
name: Muzzio, J. C.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We built two self-consistent models of triaxial, cuspy, rotating stellar systems adding rotation to non-rotating models presented in previous papers of this series. The final angular velocity of the material is not constant and varies with the distance to the center and with the height over the equator of the systems, but the figure rotation is very uniform in both cases. Even though the addition of rotation to the models modifies their original semiaxes ratios, the final rotating models are considerably flattened and triaxial. An analysis of the orbital content of the models shows that about two thirds of their orbits are chaotic yet the models are very stable over intervals of the order of one Hubble time. The bulk of regular orbits are short axis tubes, while long axis tubes are replaced by tubes whose axes lie on the short-long axes plane, but do not coincide with the major axis. Other types of regular orbits that do not appear in non-rotating systems, like horseshoes and orbits that cross themselves, are also found in the present models. Finally, our frequency maps show empty regions where studies of orbits on fixed potentials found orbits, a likely consequence of the self-consistency of our models that excludes them.
description: 15 pages, 13 figures, accepted for publication in MNRAS
Cystoseira usneoides M. Roberts
Creators: name: Jarvis, Charlie
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Plantae
Phaeophyta
Phaeophyceae
Fucales
Cystoseiraceae
Cystoseira
Cystoseira usneoides

description: Fucus usneoides Linnaeus, Systema Naturae, ed. 10, 2: 1345. 1759. RCN: 8288. Lectotype (Roberts in J. Linn. Soc., Bot. 60: 264, pl. 5. 1968): Herb. Linn. No. 1274.11 (LINN). Current name:  Cystoseira usneoides (L.) M. Roberts (Cystoseiraceae).
description: Published as part of Jarvis, Charlie, 2007, Chapter 7: Linnaean Plant Names and their Types (part F), pp. 516-528 in Order out of Chaos. Linnaean Plant Types and their Types, London :Linnaean Society of London in association with the Natural History Museum on page 527, DOI: 10.5281/zenodo.291971
AYDIV: Adaptable Yielding 3D Object Detection via Integrated Contextual Vision Transformer
Creators: name: Dam, Tanmoy
name: Dharavath, Sanjay Bhargav
name: Alam, Sameer
name: Lilith, Nimrod
name: Chakraborty, Supriyo
name: Feroskhan, Mir
Publisher: name: arXiv
Year: 2024
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Combining LiDAR and camera data has shown potential in enhancing short-distance object detection in autonomous driving systems. Yet, the fusion encounters difficulties with extended distance detection due to the contrast between LiDAR's sparse data and the dense resolution of cameras. Besides, discrepancies in the two data representations further complicate fusion methods. We introduce AYDIV, a novel framework integrating a tri-phase alignment process specifically designed to enhance long-distance detection even amidst data discrepancies. AYDIV consists of the Global Contextual Fusion Alignment Transformer (GCFAT), which improves the extraction of camera features and provides a deeper understanding of large-scale patterns; the Sparse Fused Feature Attention (SFFA), which fine-tunes the fusion of LiDAR and camera details; and the Volumetric Grid Attention (VGA) for a comprehensive spatial data fusion. AYDIV's performance on the Waymo Open Dataset (WOD) with an improvement of 1.24% in mAPH value(L2 difficulty) and the Argoverse2 Dataset with a performance improvement of 7.40% in AP value demonstrates its efficacy in comparison to other existing fusion-based methods. Our code is publicly available at https://github.com/sanjay-810/AYDIV2
description: This paper has been accepted for ICRA 2024, and copyright will automatically transfer to IEEE upon its availability on the IEEE portal
Botryocladia uvaria Kylin
Creators: name: Jarvis, Charlie
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Plantae
Rhodophyta
Florideophyceae
Rhodymeniales
Rhodymeniaceae
Botryocladia
Botryocladia uvaria

description: Fucus uvarius Linnaeus, Systema Naturae, ed. 12, 2: 714. 1767. "Habitat in O. Asiatico." RCN: 8303. Lectotype (Brodie in Spencer & al. in Taxon, in press): Herb. Linn. No. 1274.32 (LINN). Current name:  Botryocladia uvaria (L.) Kylin (Rhodymeniaceae).
description: Published as part of Jarvis, Charlie, 2007, Chapter 7: Linnaean Plant Names and their Types (part F), pp. 516-528 in Order out of Chaos. Linnaean Plant Types and their Types, London :Linnaean Society of London in association with the Natural History Museum on page 527, DOI: 10.5281/zenodo.291971
Ultracold LiCr: a new pathway to quantum gases of paramagnetic polar molecules
Creators: name: Finelli, Stefano
name: Ciamei, Alessio
name: Restivo, Beatrice
name: Schemmer, Maximilian
name: Cosco, Antonio
name: Inguscio, Massimo
name: Trenkwalder, Andreas
name: Zaremba-Kopczyk, Klaudia
name: Gronowski, Marcin
name: Tomza, Michal
name: Zaccanti, Matteo
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Quantum gases of doubly-polar molecules represent appealing frameworks for a variety of cross-disciplinary applications, encompassing quantum simulation and computation, controlled quantum chemistry and precision measurements. Through a joint experimental and theoretical study, here we explore a novel class of ultracold paramagnetic polar molecules combining lithium alkali and chromium transition metal elements. Focusing on the specific bosonic isotopologue $^{6}$Li$^{53}$Cr, leveraging on the Fermi statistics of the parent atomic mixture and on suitable Feshbach resonances recently discovered, we produce up to $50\times10^3$ ultracold LiCr molecules at peak phase-space densities exceeding 0.1, prepared within the least-bound rotationless level of the LiCr electronic $sextet$ ground state $X^6Σ^+$. We thoroughly characterize the molecular gas, demonstrating the paramagnetic nature of LiCr dimers and the precise control of their quantum state. We investigate their stability against inelastic processes and identify a parameter region where pure LiCr samples exhibit lifetimes exceeding 0.2 s. Parallel to this, we employ state-of-the-art quantum-chemical calculations to predict the properties of LiCr ground and excited electronic states. We identify efficient paths to coherently transfer weakly-bound LiCr dimers to their absolute ground state, to deliver ultracold gases of doubly-polar molecules with significant electric (3.3 D) and magnetic ($5\,μ_\text{B}$) dipole moments.
description: 27 pages, 19 figures, 8 main sections, 6 appendices and 90 references
Ergodicity of non-Hamiltonian equilibrium systems
Creators: name: Evans, Denis J.
name: Williams, Stephen R.
name: Rondoni, Lamberto
name: Searles, Debra J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: It is well known that ergodic theory can be used to formally prove a weak form of relaxation to equilibrium for finite, mixing, Hamiltonian systems. In this Letter we extend this proof to any dynamics that preserves a mixing equilibrium distribution. The proof uses an approach similar to that used in umbrella sampling, and demonstrates the need for a form of ergodic consistency of the initial and final distribution. This weak relaxation only applies to averages of physical properties. It says nothing about whether the distribution of states relaxes towards the equilibrium distribution or how long the relaxation of physical averages takes.
description: 18 pages
FAAM flight log - b371
Creators: name: FAAM
Publisher: name: Zenodo
Year: 2008

description: FAAM flight log - b371
description: Previously curated at: http://cedadocs.ceda.ac.uk/669/ Main files in this record: flight-log_faam_20080512_r0_b371.pdf Transferred to CEDA document repository community on Zenodo on 2022-11-24
Tensor network noise characterization for near-term quantum computers
Creators: name: Mangini, Stefano
name: Cattaneo, Marco
name: Cavalcanti, Daniel
name: Filippov, Sergei
name: Rossi, Matteo A. C.
name: García-Pérez, Guillermo
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Characterization of noise in current near-term quantum devices is of paramount importance to fully use their computational power. However, direct quantum process tomography becomes unfeasible for systems composed of tens of qubits. A promising alternative method based on tensor networks was recently proposed [Nat. Commun. 14, 2858 (2023)]. In this paper, we adapt it for the characterization of noise channels on near-term quantum computers and investigate its performance thoroughly. In particular, we show how experimentally feasible tomographic samples are sufficient to accurately characterize realistic correlated noise models affecting individual layers of quantum circuits, and study its performance on systems composed of up to 20 qubits. Furthermore, we combine this noise characterization method with a recently proposed noise-aware tensor network error mitigation protocol for correcting outcomes in noisy circuits, resulting accurate estimations even on deep circuit instances. This positions the tensor-network-based noise characterization protocol as a valuable tool for practical error characterization and mitigation in the near-term quantum computing era.
description: Updated version matching publication (minor modifications, added section on SPAM errors)
FAAM flight log - b372
Creators: name: FAAM
Publisher: name: Zenodo
Year: 2008

description: FAAM flight log - b372
description: Previously curated at: http://cedadocs.ceda.ac.uk/670/ Main files in this record: flight-log_faam_20080513_r0_b372.pdf Transferred to CEDA document repository community on Zenodo on 2022-11-24
Adaptive wavelet-based method for simulation of electronic circuits
Creators: name: Bittner, Kai
name: Dautbegovic, Emira
Publisher: name: arXiv
Year: 2016
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: G.1.7; G.1.2
subject: 65T60, 65L80

description: In this paper we present an algorithm for analog simulation of electronic circuits involving a spline Galerkin method with wavelet-based adaptive refinement. Numerical tests show that a first algorithm prototype, build within a productively used in-house circuit simulator, is completely able to meet and even surpass the accuracy requirements and has a performance close to classical time-domain simulation methods, with high potential for further improvement.
description: in Scientific Computing in Electrical Engineering 2010, pages 321--328. Springer, Berlin Heidelberg, 2012. arXiv admin note: text overlap with arXiv:1604.07256
FAAM flight log - b373
Creators: name: FAAM
Publisher: name: Zenodo
Year: 2008

description: FAAM flight log - b373
description: Previously curated at: http://cedadocs.ceda.ac.uk/671/ Main files in this record: flight-log_faam_20080513_r0_b373.pdf Transferred to CEDA document repository community on Zenodo on 2022-11-24
Structure and magnetic properties of a La$_{0.75}$Sr$_{0.25}$Cr$_{0.90}$O$_{3-δ}$ single crystal
Creators: name: Sun, Kaitong
name: Zhu, Yinghao
name: Yano, Shinichiro
name: Zhao, Qian
name: Su, Muqing
name: Xu, Guanping
name: Zheng, Ruifeng
name: Fu, Ying Ellie
name: Li, Hai-Feng
Publisher: name: arXiv
Year: 2024
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We have successfully grown large and good-quality single crystals of the La$_{0.75}$Sr$_{0.25}$Cr$_{0.90}$O$_{3-δ}$ compound using the floating-zone method with laser diodes. We investigated the crystal quality, crystallography, chemical composition, magnetic properties and the oxidation state of Cr in the grown single crystals by employing a combination of techniques, including X-ray Laue and powder diffraction, scanning electron microscopy, magnetization measurements, X-ray photoelectron spectroscopy and light absorption. The La$_{0.75}$Sr$_{0.25}$Cr$_{0.90}$O$_{3-δ}$ single crystal exhibits a single-phase composition, crystallizing in a trigonal structure with the space group $R\bar{3}c$ at room temperature. The chemical composition was determined as La$_{0.75}$Sr$_{0.25}$Cr$_{0.90}$O$_{3-δ}$, indicating a significant chromium deficiency. Upon warming, we observed five distinctive characteristic temperatures, namely $T_1 =$ 21.50(1) K, $T_2 =$ 34.98(1) K, $T_3 =$ 117.94(1) K, $T_4 =$ 155.01(1) K, and $T_{\textrm{N}} =$ 271.80(1) K, revealing five distinct magnetic anomalies. Our magnetization study allows us to explore the nature of these anomalies. Remarkably, the oxidation state of chromium in the single-crystal La$_{0.75}$Sr$_{0.25}$Cr$_{0.90}$O$_{3-δ}$, characterized by a band gap of 1.630(8) eV, is exclusively attributed to Cr$^{3+}$ ions, making a departure from the findings of previous studies on polycrystalline materials.
description: 24 pages, 10 figures
Interpretation Makes All the Difference: How Content Moderators Construct Organizational Identity and Navigate Ambiguity
Creators: name: Gan, Michelle
Publisher: name: Stanford Digital Repository
Year: 2023
Subjects: subject: Computing platforms
subject: Labor
subject: Organizational behavior--Study and teaching

description: Platforms are principal spaces for the public: to gather, share information, form online communities, and engage in self-expression. As such, social media platforms hold a massive influence on sociality and contemporary culture. Critical to platforms’ vision as a public space for all users are the commercial content moderators who enforce detailed policies to review, tag, and remove potentially harmful content from the platform. Through an analysis of interviews with TikTok content moderators and public materials, I examine how moderators navigate ambiguity in their roles from the lens of identity work. I argue that moderators construct organizational identities to cope with the limited agency and high pressures of their roles. While company culture provides moderators new incentives to conform to organizational guidelines and norms around decision-making, moderators’ organizational identities inevitably “collapse” due to burnout or disillusionment with the role or company. I discuss the implications of this burnout and disincentivizing moderator agency over policy changes.
Exploring the Origins of Deuterium Enrichments in Solar Nebular Organics
Creators: name: Cleeves, L. Ilsedore
name: Bergin, Edwin A.
name: Alexander, Conel M. O'D.
name: Du, Fujun
name: Graninger, Dawn
name: Öberg, Karin I.
name: Harries, Tim J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Deuterium-to-hydrogen (D/H) enrichments in molecular species provide clues about their original formation environment. The organic materials in primitive solar system bodies have generally higher D/H ratios and show greater D/H variation when compared to D/H in solar system water. We propose this difference arises at least in part due to 1) the availability of additional chemical fractionation pathways for organics beyond that for water, and 2) the higher volatility of key carbon reservoirs compared to oxygen. We test this hypothesis using detailed disk models, including a sophisticated, new disk ionization treatment with a low cosmic ray ionization rate, and find that disk chemistry leads to higher deuterium enrichment in organics compared to water, helped especially by fractionation via the precursors CH$_2$D$^+$/CH$_3^+$. We also find that the D/H ratio in individual species varies significantly depending on their particular formation pathways. For example, from $\sim20-40$ AU, CH$_4$ can reach $\rm{D/H\sim2\times10^{-3}}$, while D/H in CH$_3$OH remains locally unaltered. Finally, while the global organic D/H in our models can reproduce intermediately elevated D/H in the bulk hydrocarbon reservoir, our models are unable to reproduce the most deuterium-enriched organic materials in the solar system, and thus our model requires some inheritance from the cold interstellar medium from which the Sun formed.
description: 11 pages, 7 figures, accepted for publication in ApJ
Lorentz violation induces isospectrality breaking in Einstein-Bumblebee gravity theory
Creators: name: Liu, Wentao
name: Fang, Xiongjun
name: Jing, Jiliang
name: Wang, Jieci
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper, we investigate the quasinormal modes (QNMs) of a Lorentz-violating spacetime, factoring in a cosmological constant, within the framework of Einstein-Bumblebee gravity. Our findings reveal that the interaction of spacetime with an anisotropic bumblebee field imparts distinct contributions to the axial and polar sectors of the vector perturbations. This subsequently breaks the isospectrality typically observed in vector modes. Numerical evidence strongly indicates isospectral breaking in the vector modes of Einstein-Bumblebee black holes: a pronounced breakage in the real part of the frequencies, while the imaginary component seems less affected. This isospectral breaking indicates the existence of two different waveforms in the Ringdown phase of the black hole, which provides a potential signal of quantum gravity observable in current experiments.
description: 9 pages, 16 figures
A new method of probing mechanical losses of coatings at cryogenic temperatures
Creators: name: Galliou, Serge
name: Deléglise, Samuel
name: Goryachev, Maxim
name: Neuhaus, Leonhard
name: Cagnoli, Gianpietro
name: Zerkani, Salim
name: Dolique, Vincent
name: Vacheret, Xavier
name: Abbé, Philippe
name: Pinard, Laurent
name: Michel, Christophe
name: Karassouloff, Thibaut
name: Briant, Tristan
name: Cohadon, Pierre-François
name: Heidmann, Antoine
name: Tobar, Michael E.
name: Bourquin, Roger
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A new method of probing mechanical losses and comparing the corresponding deposition processes of metallic and dielectric coatings in 1-100 MHz frequency range and cryogenic temperatures is presented. The method is based on the use of extremely high-quality quartz acoustic cavities whose internal losses are orders of magnitude lower than any available coatings nowadays. The approach is demonstrated for Chromium, Chromium/Gold and a multilayer tantala/silica coatings. The ${\rm Ta}_2{\rm O}_5/{\rm Si}{\rm O}_2$ coating has been found to exhibit a loss angle lower than $1.6\times10^{-5}$ near 30 {\rm MHz} at 4 {\rm K}. The results are compared to the previous measurements.
Hymenena venosa C. Krauss
Creators: name: Jarvis, Charlie
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Plantae
Rhodophyta
Florideophyceae
Ceramiales
Delesseriaceae
Hymenena
Hymenena venosa

description: Fucus venosus Linnaeus, Mantissa Plantarum Altera: 312. 1771. "Habitat ad Cap. b. spei." RCN: 8349. Lectotype (Irvine in Spencer & al. in Taxon, in press): Herb. Linn. No. 1274.78 (LINN). Current name:  Hymenena venosa (L.) C. Krauss (Delesseriaceae).
description: Published as part of Jarvis, Charlie, 2007, Chapter 7: Linnaean Plant Names and their Types (part F), pp. 516-528 in Order out of Chaos. Linnaean Plant Types and their Types, London :Linnaean Society of London in association with the Natural History Museum on page 527, DOI: 10.5281/zenodo.291971
FAAM flight log - b394
Creators: name: FAAM
Publisher: name: Zenodo
Year: 2008

description: FAAM flight log - b394
description: Previously curated at: http://cedadocs.ceda.ac.uk/672/ Main files in this record: flight-log_faam_20080813_r0_b394.pdf Transferred to CEDA document repository community on Zenodo on 2022-11-24
Phaenopria simillima Ashmead in Riley, Ashmead & Howard 1894
Creators: name: Notton, David G.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Phaenopria
Phaenopria simillima

description: Phaenopria simillima Ashmead in Riley, Ashmead & Howard, 1894: 253, 254.
Valid name
Trichopria simillima (Ashmead in Riley, Ashmead & Howard, 1894).
Summary of types
Syntype ♀.
Primary type data
St. V., West/ Indies, Smith; Phaenopria / simillima/ ♀ Ashm.; W.Indies/ 99-331.
Type locality
West Indies, St Vincent.
Remarks
This species was described from one female and one male. One female syntype was found; this is glued to the end of a micropin and is entire.
description: Published as part of Notton, David G., 2014, A catalogue of the types of Diapriinae (Hymenoptera, Diapriidae) at the Natural History Museum, London, pp. 1-123 in European Journal of Taxonomy 75 on pages 15-16, DOI: 10.5852/ejt.2014.75, http://zenodo.org/record/3862773
Phenomenological modeling of Geometric Metasurfaces
Creators: name: Ye, Weimin
name: Guo, Qinghua
name: Xiang, Yuanjiang
name: Fan, Dianyuan
name: Zhang, Shuang
Publisher: name: arXiv
Year: 2015
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Metasurfaces, with their superior capability in manipulating the optical wavefront at the subwavelength scale and low manufacturing complexity, have shown great potential for planar photonics and novel optical devices. However, vector field simulation of metasurfaces is so far limited to periodic-structured metasurfaces containing a small number of meta-atoms in the unit cell by using full-wave numerical methods. Here, we propose a general phenomenological method to analytically model metasurfaces made up of arbitrarily distributed meta-atoms based on the assumption that the meta-atoms possess localized resonances with Lorentz-Drude forms, whose exact form can be retrieved from the full wave simulation of a single element. Applied to phase modulated geometric metasurfaces, our analytical results show good agreement with full-wave numerical simulations. The proposed theory provides an efficient method to model and design optical devices based on metasurfaces.
description: 16 pages, 8 figures
SDSS J085431.18+173730.5: The First Compact Elliptical Galaxy Hosting an Active Nucleus
Creators: name: Paudel, Sanjaya
name: Hilker, Michael
name: Ree, Change Hee
name: Kim, Minjin
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report the discovery of a rare compact early-type galaxy, SDSS J085431.18+173730.5 (hereafter cE\_AGN). It has an half light radius of R$_{e}$ = 490 pc and a brightness of M$_{r}$ = $-$18.08 mag. Optical spectroscopy available from the Sloan Digital Sky Survey (SDSS) reveals the presence of prominent broad-line emissions with the H$α$ broad component width of FWHM=2400 km/s. The black hole (BH) mass, as estimated from the luminosity and width of the broad H$α$ emission, is 2.1$\times$10$^{6}$ M$_{\sun}$. With the help of surface photometry, we perform a detailed analysis of the structural properties. The observed light distribution is best modeled with a double Sérsic function. Fixing the outer component as an exponential disk, we find that the inner component has a Sérsic index of n = 1.4. Considering the inner component as bulge/spheroidal we find that cE\_AGN remains consistent in both BH mass -- bulge mass relation and BH mass -- bulge Sérsic index relation. Given these observational properties, we discuss its possible origin investigating the surrounding environment where it is located.
description: Accepted for publication in APJL
NNVub: a Neural Network Approach to $B\to X_u \ell ν$
Creators: name: Gambino, Paolo
name: Healey, Kristopher J.
name: Mondino, Cristina
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We use artificial neural networks to parameterize the shape functions in inclusive semileptonic $B$ decays without charm. Our approach avoids the adoption of functional form models and allows for a straightforward implementation of all experimental and theoretical constraints on the shape functions. The results are used to extract $|V_{ub}|$ in the GGOU framework and compared with the original GGOU paper and the latest HFAG results, finding good agreement in both cases. The possible impact of future Belle-II data on the $M_X$ distribution is also discussed.
description: 10 pages, 5 figures
Massive MIMO Combining with Switches
Creators: name: Alkhateeb, Ahmed
name: Nam, Young-Han
name: Zhang, Jianzhong
name: Heath, Robert W.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: Massive multiple-input multiple-output (MIMO) is expected to play a central role in future wireless systems. The deployment of large antenna arrays at the base station and the mobile users offers multiplexing and beamforming gains that boost system spectral efficiency. Unfortunately, the high cost and power consumption of components like analog-to-digital converters makes assigning an RF chain per antenna and applying typical fully digital precoding/combining solutions difficult. In this paper, a novel architecture for massive MIMO receivers, consisting of arrays of switches and constant (non-tunable) phase shifters, is proposed. This architecture applies a quasi-coherent combining in the RF domain to reduce the number of required RF chains. An algorithm that designs the RF combining for this architecture is developed and analyzed. Results show that the proposed massive MIMO combining model can achieve a comparable performance to the fully-digital receiver architecture in single-user and multi-user massive MIMO setups.
description: 4 pages, 3 figures, accepted in IEEE Wireless Communications Letters
Pion production off the nucleon
Creators: name: Alam, M. Rafi
name: Athar, M. Sajjad
name: Chauhan, Shikha
name: Singh, S. K.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We have studied charged current neutrino/antineutrino induced weak pion production from nucleon. For the present study, contributions from $Δ(1232)$-resonant term, non-resonant background terms as well as contribution from higher resonances viz. $P_{11}$(1440), $D_{13}$(1520), $S_{11}$(1535), $S_{11}$(1650) and $P_{13}$(1720) are taken. To write the hadronic current for the non-resonant background terms, a microscopic approach based on SU(2) non-linear sigma model has been used. The vector form factors for the resonances are obtained from the helicity amplitudes provided by MAID. Axial coupling in the case of $Δ(1232)$ resonance is obtained by fitting the ANL and BNL $ν$-deuteron reanalyzed scattering data. The results of the cross sections are presented and discussed for all the possible channels of single pion production induced by charged current interaction.
description: Published in Journal of the Physical Society of Japan (NuInt-2015). arXiv admin note: text overlap with arXiv:1509.08622
Additively manufactured ceramics for compact quantum technologies
Creators: name: Christ, Marc
name: Zimmermann, Conrad
name: Neinert, Sascha
name: Leykauf, Bastian
name: Döringshoff, Klaus
name: Krutzik, Markus
Publisher: name: arXiv
Year: 2024
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Quantum technologies are advancing from fundamental research in specialized laboratories to practical applications in the field, driving the demand for robust, scalable, and reproducible system integration techniques. Ceramic components can be pivotal thanks to high stiffness, low thermal expansion, and excellent dimensional stability under thermal stress. We explore lithography-based additive manufacturing of technical ceramics especially for miniaturized physics packages and electro-optical systems. This approach enables functional systems with precisely manufactured, intricate structures and high mechanical stability while minimizing size and weight. It facilitates rapid prototyping, simplifies fabrication and leads to highly integrated, reliable devices. As an electrical insulator with low outgassing and high temperature stability, printed technical ceramics such as Al2O3 and AlN bridge a technology gap in quantum technology and offer advantages over other printable materials. We demonstrate this potential with CerAMRef, a micro-integrated rubidium D2 line optical frequency reference on a printed Al2O3 micro-optical bench and housing. The frequency instability of the reference is comparable to laboratory setups while the volume of the integrated spectroscopy setup is only 6 ml. We identify potential for future applications in compact atomic magnetometers, miniaturized optical atom traps, and vacuum system integration.
Accretion Flow Properties of MAXI J1543-564 During 2011 Outburst from TCAF Solution
Creators: name: Chatterjee, Debjit
name: Debnath, Dipak
name: Chakrabarti, Sandip K.
name: Mondal, Santanu
name: Jana, Arghajit
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We derive accretion flow properties of the transient black hole candidate (BHC) MAXI~J1543-564 using the RXTE data. We use Two-Component Advective Flow (TCAF) solution to fit the data of the very initial rising phase of outburst (from 2011 May 10 to 2011 May 15). $2.5-25$~keV spectra are fitted using the TCAF solution {\it fits} file as a local additive table model in XSPEC. We extract physical flow parameters such as the two component (Keplerian disk and sub-Keplerian halo) accretion rates and size and the property of the Compton cloud (post shock region close to a black hole). Similar to other classical transient BHCs, monotonic evolution of low frequency quasi-periodic oscillations (QPOs) are observed during the rising phase of the outburst, which is fitted with the propagating oscillatory shock (POS) model which describes how the Compton cloud properties change from day to day. From the nature of variations of TCAF model fitted physical flow parameters and QPOs, we only found hard-intermediate and soft-intermediate spectral states during this phase of the outburst under study. We also calculate frequency of the dominating QPOs from the TCAF model fitted shock parameters, and found that they roughly match with the observed and POS model fitted values. From our spectro-temporal study of the source with TCAF and POS models, the most probable mass of the BHC is found to be $12.6-14.0$~$M_\odot$, or $13^{+1.0}_{-0.4}~M_\odot$.
description: 11 Pages, 5 Figures, and 2 Tables (Accepted for publication in ApJ)
Fucus vesiculosus Linnaeus 1753
Creators: name: Jarvis, Charlie
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Plantae
Phaeophyta
Phaeophyceae
Fucales
Fucaceae
Fucus
Fucus vesiculosus

description: Fucus vesiculosus Linnaeus, Species Plantarum 2: 1158. 1753. "Habitat in Mari atlantico." RCN: 8266, 8310. Lectotype (Irvine in Spencer & al. in Taxon, in press): Herb. Linn. No. 1274.48 (LINN). Generitype of Fucus Linnaeus (vide De Toni in Flora 74: 173. 1891). Current name:  Fucus vesiculosus L. (Fucaceae). Note: Woelkerling (in Rhodora 77: 16. 1975) indicated material in LINN as the type but did not distinguish between several sheets there associated with this name. As they are evidently not part of a single gathering, Art. 9.15 does not apply.
description: Published as part of Jarvis, Charlie, 2007, Chapter 7: Linnaean Plant Names and their Types (part F), pp. 516-528 in Order out of Chaos. Linnaean Plant Types and their Types, London :Linnaean Society of London in association with the Natural History Museum on page 527, DOI: 10.5281/zenodo.291971
Chemical Bonding of Transition-metal Co$_{13}$ Clusters with Graphene
Creators: name: Alonso-Lanza, Tomás
name: Ayuela, Andrés
name: Aguilera-Granja, Faustino
Publisher: name: arXiv
Year: 2015
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We carried out density functional calculation to study Co$_{13}$ clusters on graphene. We deposit several free isomers in different disposition respect to hexagonal lattice nodes, studying even the $hcp$ $2d$ isomer recently obtained as the most stable one. Surprisingly, Co$_{13}$ clusters bonded to graphene prefer $icosahedron-like$ structures where the low lying isomer is much distorted, because it is linked with more bonds than in previous works. For any isomer the most stable position binds to graphene by the Co atoms that can lose electrons. We find that the charge transfers between graphene and clusters are small enough to conclude that the Co-graphene binding is not ionic-like but chemical. Besides, the same order of stability among the different isomers on doped graphene is well kept. These findings could also be of interest for magnetic clusters on graphenic nanostructures such as ribbons and nanotubes.
description: 12 pages, 6 figures
Loxotropa pleuralis Ashmead 1896
Creators: name: Notton, David G.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Diapriidae
Loxotropa
Loxotropa pleuralis

description: Loxotropa pleuralis Ashmead, 1896: 803.
Valid name
Basalys pleuralis (Ashmead, 1896).
Summary of types
Holotype ♀, BMNH number 9.742, by monotypy.
Primary type data
Balthazar/ Windward side/ Grenada, W.I./ H.H. Smith; Type / H. T.; Loxotropa / pleuralis/ ♀ type Ashm.
Type locality
West Indies, Grenada, Balthazar.
Remarks
This species was described from a single female. One specimen was found which has quite a small scutellar pit; however, it agrees well with the description in all other respects and is certainly the holotype. The holotype is mounted on a card and is entire.
description: Published as part of Notton, David G., 2014, A catalogue of the types of Diapriinae (Hymenoptera, Diapriidae) at the Natural History Museum, London, pp. 1-123 in European Journal of Taxonomy 75 on page 16, DOI: 10.5852/ejt.2014.75, http://zenodo.org/record/3862773
FAAM flight log - b395
Creators: name: FAAM
Publisher: name: Zenodo
Year: 2008

description: FAAM flight log - b395
description: Previously curated at: http://cedadocs.ceda.ac.uk/673/ Main files in this record: flight-log_faam_20080814_r0_b395.pdf Transferred to CEDA document repository community on Zenodo on 2022-11-24
Suhria vittata Endl.
Creators: name: Jarvis, Charlie
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Plantae
Rhodophyta
Florideophyceae
Gelidiales
Gelidiaceae
Suhria
Suhria vittata

description: Fucus vittatus Linnaeus, Systema Naturae, ed. 12, 2: 718. 1767. RCN: 8350. Lectotype (Papenfuss in J. S. African Bot. 17: 173. 1951): Herb. Linn. No. 1274.79 (LINN). Current name:  Suhria vittata (L.) Endl. (Gelidiaceae).
description: Published as part of Jarvis, Charlie, 2007, Chapter 7: Linnaean Plant Names and their Types (part F), pp. 516-528 in Order out of Chaos. Linnaean Plant Types and their Types, London :Linnaean Society of London in association with the Natural History Museum on page 527, DOI: 10.5281/zenodo.291971
title: Zur Erinnerung an Otto Zietzschmann, Professor Dr. phil. et Dr. med. vet. h.c. 1879-1957
title: Gedenkfeier anlässlich der Bestattung, Freitag, 19. Juli 1957 im Krematorium Zürich
titleType: Subtitle
Creators: name: Métraux, Hans
name: Seiferle, Eugen
name: Nickel, Richard
name: Schummer, A.
Publisher: name: [Verlag nicht ermittelbar]
Year: 1957
Subjects: subject: 920 Biografien, Genealogie, Insignien
subject: Nachruf
subject: Zietzschmann, Otto
subject: Dresden
subject: Zürich
subject: Reformierte Kirche Fluntern (Zürich)

description: Inhalt: Abdankungsansprache von Pfarrer Métraux ; sowie verschiedene weitere Ansprachen von
Effects of Nuclear Medium on the Sum Rules in Electron and Neutrino Scattering
Creators: name: Zaidi, F.
name: Haider, H.
name: Athar, M. Sajjad
name: Singh, S. K.
name: Simo, I. Ruiz
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In this work, we study the influence of nuclear medium effects on various parton model sum rules in nuclei and compare the results with the free nucleon case. We have used relativistic nucleon spectral function to take into account Fermi motion, binding and nucleon correlations. The pion and rho meson cloud contributions have been incorporated in a microscopic model. The effect of shadowing has also been considered.
description: Published in Journal of the Physical Society of Japan (NuInt-2015)
FAAM flight log - b396
Creators: name: FAAM
Publisher: name: Zenodo
Year: 2008

description: FAAM flight log - b396
description: Previously curated at: http://cedadocs.ceda.ac.uk/674/ Main files in this record: flight-log_faam_20080819_r0_b396.pdf Transferred to CEDA document repository community on Zenodo on 2022-11-24
Simulator Demonstration of Large Scale Variational Quantum Algorithm on HPC Cluster
Creators: name: Morita, Mikio
name: Tomita, Yoshinori
name: Koyama, Junpei
name: Kimura, Koichi
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Advances in quantum simulator technology is increasingly required because research on quantum algorithms is becoming more sophisticated and complex. State vector simulation utilizes CPU and memory resources in computing nodes exponentially with respect to the number of qubits; furthermore, in a variational quantum algorithm, the large number of repeated runs by classical optimization is also a heavy load. This problem has been addressed by preparing numerous computing nodes or simulation frameworks that work effectively. This study aimed to accelerate quantum simulation using two newly proposed methods: to efficiently utilize limited computational resources by adjusting the ratio of the MPI and distributed processing parallelism corresponding to the target problem settings and to slim down the Hamiltonian by considering the effect of accuracy on the calculation result. Ground-state energy calculations of fermionic model were performed using variational quantum eigensolver (VQE) on an HPC cluster with up to 1024 FUJITSU Processor A64FX connected to each other by InfiniBand; the processor is also used on supercomputer Fugaku. We achieved 200 times higher speed over VQE simulations and demonstrated 32 qubits ground-state energy calculations in acceptable time. This result indicates that > 30 qubit state vector simulations can be realistically utilized to further research on variational quantum algorithms.
description: Submitted to IEEEAccess
Evolution of correlated multiplexity through stability maximization
Creators: name: Dwivedi, Sanjiv K.
name: Jalan, Sarika
Publisher: name: arXiv
Year: 2016
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Investigating relation between various structural patterns found in real-world networks and stability of underlying systems is crucial to understand importance and evolutionary origin of such patterns. We evolve multiplex networks, comprising of anti-symmetric couplings in one layer, depicting predator-prey relation, and symmetric couplings in the other, depicting mutualistic (or competitive) relation, based on stability maximization through the largest eigenvalue. We find that the correlated multiplexity emerges as evolution progresses. The evolved values of the correlated multiplexity exhibit a dependence on the inter-link coupling strength. Furthermore, the inter-layer coupling strength governs the evolution of disassortativity property in the individual layers. We provide analytical understanding to these findings by considering star like networks in both the layers. The model and tools used here are useful for understanding the principles governing the stability as well as importance of such patterns in the underlying networks of real-world systems.
description: 5 pages, 4 figures
Gravitational vacua in the Newman-Penrose formalism
Creators: name: Mao, Pujian
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper, we derive the generic solution of the Newman-Penrose equations in the Newman-Unti gauge with vanishing curvature tensor. The obtained solutions are the vacua of the gravitational theory which are connected to the derivations in metric formalism from exponentiating the infinitesimal BMS generators in the BMS gauge in \cite{Compere:2016jwb,Compere:2016hzt} by a radial transformation. The coordinate transformations in the Newman-Unti gauge connecting each vacuum are also obtained. We confirm that the supertranslation charge of the gravitational vacua with respect to global considerations vanishes exactly not only in the Einstein theory but also when including the Holst, Pontryagin, and Gauss-Bonnet terms which verifies that the gravitational vacua are not affected by those trivial or boundary terms.
description: v2: 12 pages, more details of the computations presented, interpretation improved, published version
Osmundaria volubilis R. E. Norris
Creators: name: Jarvis, Charlie
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Plantae
Rhodophyta
Florideophyceae
Ceramiales
Rhodomelaceae
Osmundaria
Osmundaria volubilis

description: Fucus volubilis Linnaeus, Systema Naturae, ed. 10, 2: 1344. 1759. ["Habitat in Mari Mediterraneo."] Sp. Pl., ed. 2, 2: 1627 (1763). RCN: 8269, 8309. Lectotype (Irvine in Spencer & al. in Taxon, in press): Herb. Linn. No. 1274.47 (LINN). Current name:  Osmundaria volubilis (L.) R.E. Norris (Rhodomelaceae). Note: See discussion by Norris (in Bot. J. Linn. Soc. 106: 15. 1991), who treated unspecified material in L as the holotype. This cannot be traced but is very unlikely to have been original material for the name (see Spencer & al. in Taxon, in press).
description: Published as part of Jarvis, Charlie, 2007, Chapter 7: Linnaean Plant Names and their Types (part F), pp. 516-528 in Order out of Chaos. Linnaean Plant Types and their Types, London :Linnaean Society of London in association with the Natural History Museum on page 527, DOI: 10.5281/zenodo.291971
FAAM flight log - b397
Creators: name: FAAM
Publisher: name: Zenodo
Year: 2008

description: FAAM flight log - b397
description: Previously curated at: http://cedadocs.ceda.ac.uk/675/ Main files in this record: flight-log_faam_20080822_r0_b397.pdf Transferred to CEDA document repository community on Zenodo on 2022-11-24
Spontaneous Chiral Symmetry Breaking in Bilayer Graphene
Creators: name: Zhang, Fan
Publisher: name: arXiv
Year: 2015
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Bilayer graphene and its thicker cousins with Rhombohedral stacking have attracted considerable attention because of their susceptibility to a variety of broken chiral symmetry states. Due to large density-of-states and quantized Berry phases near their gapless band touching points, each spin-valley flavor spontaneously transfers charge between layers to yield opening of energy gaps in quasiparticle spectra and spreading of momentum-space Berry curvatures. In this article we review the development of theories that predicted such chiral symmetry breaking and classified the possible topological many-body ground states, and the observations in recent experiments that are in reasonable agreement with these theories.
description: Review, 10 pages, 6 figures, 1 table
A spectral and photometric study of 102 star forming regions in seven spiral galaxies
Creators: name: Gusev, A. S.
name: Sakhibov, F.
name: Piskunov, A. E.
name: Kharchenko, N. V.
name: Bruevich, V. V.
name: Ezhkova, O. V.
name: Guslyakova, S. A.
name: Lang, V.
name: Shimanovskaya, E. V.
name: Efremov, Yu. N.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a study of complexes of young massive star clusters (YMCs), embedded in extragalactic giant HII regions, based on the coupling of spectroscopic with photometric and spectrophotometric observations of about 100 star forming regions in seven spiral galaxies (NGC 628, NGC 783, NGC 2336, NGC 6217, NGC 6946, NGC 7331, and NGC 7678). The complete observational database has been observed and accumulated within the framework of our comprehensive study of extragalactic star forming regions. The current paper presents the last part of either unpublished or refreshed photometric and spectrophotometric observations of the galaxies NGC 6217, NGC 6946, NGC 7331, and NGC 7678. We derive extinctions, chemical abundances, continuum and line emissions of ionised gas, ages and masses for cluster complexes. We find the young massive cluster complexes to have ages no greater than 10 Myr and masses between 10^4Msol and 10^7Msol, and the extinctions A(V) vary between ~ 0 and 3 mag, while the impact of the nebular emission on integrated broadband photometry mainly is not greater than 40% of the total flux and is comparable with accuracies of dereddened photometric quantities.We also find evidence of differential extinction of stellar and gas emissions in some clusters, which hinders the photometric determination of ages and masses in these cases. Finally, we show that young massive cluster complexes in the studied galaxies and open clusters in the Milky Way form a continuous sequence of luminosities/masses and colour/ages.
description: 23 pages, 22 figures, 5 tables (high resolution jpeg Figure 15 is available in the source format). Accepted for publication in MNRAS
Statistical evaluation and optimization of entanglement purification protocols
Creators: name: Preti, Francesco
name: Bernád, József Zsolt
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantitative characterization of two-qubit entanglement purification protocols is introduced. Our approach is based on the concurrence and the hit-and-run algorithm applied to the convex set of all two-qubit states. We demonstrate that pioneering protocols are unable to improve the estimated initial average concurrence of almost uniformly sampled density matrices, however, as it is known, they still generate pairs of qubits in a state that is close to a Bell state. We also develop a more efficient protocol and investigate it numerically together with a recent proposal based on an entangling rank-$2$ projector. Furthermore, we present a class of variational purification protocols with continuous parameters and optimize their output concurrence. These optimized algorithms turn out to surpass former proposals and our protocol by means of not wasting too many entangled states.
description: 16 pages, 6 figures
FAAM flight log - b397
Creators: name: FAAM
Publisher: name: Zenodo
Year: 2008

description: FAAM flight log - b397
description: Previously curated at: http://cedadocs.ceda.ac.uk/676/ Main files in this record: flight-log_faam_20080822_r1_b397.pdf Transferred to CEDA document repository community on Zenodo on 2022-11-24
FAAM flight log - b398
Creators: name: FAAM
Publisher: name: Zenodo
Year: 2008

description: FAAM flight log - b398
description: Previously curated at: http://cedadocs.ceda.ac.uk/677/ Main files in this record: flight-log_faam_20080911_r0_b398.pdf Transferred to CEDA document repository community on Zenodo on 2022-11-24