cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Hey Siri!: A Study of Everyday Information Seeking Among Frequent Users of Intelligent Personal Assistants.
Creators: name: Chadwick, Gordon
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2017
Subjects: Information retrieval
Internet searching
Information-seeking strategies
Interactive computer systems
Intelligent agents (Computer software)
Human-computer interaction

description: This study used diaries and interviews to examine everyday information seeking behaviors among a group of frequent users of intelligent personal assistants. All participants completed diaries and met for a brief interview following the completion of their diaries. Diary responses captured real life examples of intelligent personal assistant usage, while interviews focused on general perceptions of intelligent personal assistants. Participants frequently used their intelligent personal assistants to find factual information but often expressed reluctance to ask assistants questions that would be difficult for the assistants to answer well. Many assistant uses were for repetitive and frequent types of information needs. Participants expressed mixed opinions about the appropriateness of intelligent personal assistant use in social situations. Some, though not all, of the findings of this study confirm the findings of other research in the growing body of research on intelligent personal assistants.
Phonon Signatures in Photon Correlations
Creators: name: Humphries, Ben S.
name: Green, Dale
name: Borgh, Magnus O.
name: Jones, Garth A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We show that the second-order, two-time correlation functions for phonons and photons emitted from a vibronic molecule in a thermal bath result in bunching and anti-bunching (a purely quantum effect), respectively. Signatures relating to phonon exchange with the environment are revealed in photon-photon correlations. We demonstrate that cross-correlation functions have a strong dependence on the order of detection giving insight into how phonon dynamics influences the emission of light. This work offers new opportunities to investigate quantum effects in condensed-phase molecular systems.
description: Author accepted manuscript. 7 pages, 3 figures plus 5 pages of Supplemental material with 7 figures
Telescoping method and congruences for double sums
Creators: name: Mu, Yan-Ping
name: Sun, Zhi-Wei
Publisher: name: arXiv
Year: 2016
Subjects: subject: Number Theory (math.NT)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 11B75, 05A10, 11A07, 33F10

description: In recent years, Z.-W. Sun proposed several sophisticated conjectures on congruences for finite sums with terms involving combinatorial sequences such as central trinomial coefficients, Domb numbers and Franel numbers. These sums are double summations of hypergeometric terms. Using the telescoping method and certain mathematical software packages, we transform such a double summation into a single sum. With this new approach, we confirm several open conjectures of Sun.
description: 23 pages
MS Gr. class. c. 2 295
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 307 col. 10. Chrysippus, Quaestiones logicae
Drawing by Carlo Orazi
Phase transitions and spin dynamics of the quasi-one dimensional Ising-like antiferromagnet BaCo$_{2}$V$_{2}$O$_{8}$ in a longitudinal magnetic field
Creators: name: Takayoshi, Shintaro
name: Faure, Quentin
name: Simonet, Virginie
name: Grenier, Béatrice
name: Petit, Sylvain
name: Ollivier, Jacques
name: Lejay, Pascal
name: Giamarchi, Thierry
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: By combining inelastic neutron scattering and numerical simulations, we study the quasi-one dimensional Ising-like quantum antiferromagnet BaCo$_{2}$V$_{2}$O$_{8}$ in a longitudinal magnetic field applied along the magnetic anisotropy axis, which is also the chain direction. The external field closes the excitation gap due to the magnetic anisotropy, inducing a transition from the Néel ordered state to an incommensurate longitudinal spin density wave phase. If the field is increased further, another transition into a transverse antiferromagnetic phase takes place at 9 T due to the competition between longitudinal and transverse correlations. We numerically and experimentally show that the model of XXZ chains connected by a weak interchain interaction well reproduces this transition. We also calculate the dynamical susceptibility and demonstrate that it agrees quantitatively with inelastic neutron scattering measurements. In contrast to the abrupt change of magnetic ordering, the spectra do not change much at the transition at 9 T, and the spin dynamics can be described as a Tomonaga-Luttinger liquid. We also refine the modeling of BaCo$_{2}$V$_{2}$O$_{8}$ by including a four-site periodic term arising from the crystal structure which enables to account for an anomaly of the magnetic susceptibility appearing at 19 T as well as for the anticrossing observed in the inelastic neutron scattering spectra.
description: 13 pages, 8 figures
Dynamical Coulomb blockade of tunnel junctions driven by alternating voltages
Creators: name: Grabert, Hermann
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The theory of dynamical Coulomb blockade is extended to tunneling elements driven by a time-dependent voltage. It is shown that for standard set-ups where an external voltage is applied to a tunnel junction via an impedance, time-dependent driving entails an excitation of the modes of the electromagnetic environment by the applied voltage. Previous approaches for ac driven circuits need to be extended to account for the driven bath modes. A unitary transformation involving also the variables of the electromagnetic environment is introduced which allows to split-off the time-dependence from the Hamiltonian in the absence of tunneling. This greatly simplifies perturbation-theoretical calculations based on treating the tunneling Hamiltonian as a perturbation. In particular, the average current flowing in the leads of the tunnel junction is studied. Explicit results are given for the case of an applied voltage with a constant dc part and a sinusoidal ac part. The connection with standard dynamical Coulomb blockade theory for constant applied voltage is established. It is shown that an alternating voltage source reveals significant additional effects caused by the electromagnetic environment. The hallmark of dynamical Coulomb blockade in ac driven devices is a suppression of higher harmonics of the current by the electromagnetic environment. The theory presented basically applies to all tunneling devices driven by alternating voltages.
description: 13 pages, 2 figure
A Comparison of Four Energy Data Collection Methods in Durham City/County, North Carolina
Creators: name: Beverly, Janelle A.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2012
Subjects: Program Planning--Evaluation
Information Access
Energy Conservation and Efficiency
Data Acquisition
Information use
Information needs

description: The Department of Energy (DOE) has spent $11.3 billion in Recovery Act funds. These funds support state and local energy programs to provide energy efficiency. The DOE evaluates the impacts of these investments with various reporting metrics, including energy savings. Energy Efficiency Program managers in North Carolina have reported challenges in collecting energy information from public utilities and homeowners. This study examined four energy data collection methods that Durham City/County Sustainability Office employs with 435 homes: email solicitation, mail solicitation, direct access to a utility database and utility report. This research included a telephone survey of 30 Better Buildings Program managers. Fifty-three percent of surveyed managers collect energy information from public utilities. This study found that, of the four energy data collection methods, utility reports yielded the most complete and timely access to home energy information. Managers have limited access to energy information dependent on the energy data collection method.
Planning for sustainable urban mobility in Southern Europe: insights from Rome and Madrid
Creators: name: Angiello, Gennaro
Publisher: name: TeMA - Journal of Land Use, Mobility and Environment
Year: 2022

description: Starting from the relationship between urban planning and mobility management, TeMA has gradually expanded the view of the covered topics, always following a rigorous scientific in-depth analysis. This section of the Journal, Review Notes, is the expression of a continuous updating of emerging topics concerning relationships among urban planning, mobility and environment, through a collection of short scientific papers. The Review Notes are made of four parts. Each section examines a specific aspect of the broader information storage within the main interests of TeMA Journal. In particular, the Urban Practices section aims at producing, analyzing and reporting data on recent and relevant policies in the urban domain. The present note in particular reports on the recent initiatives undertaken by two major Southern European capitals to foster sustainable mobility: Rome (IT) and Madrid (ES). To this aim, the note briefly introduces the legal background and current developments of the Sustainable Urban Mobility Plan (SUMP), a framework developed by the European Commission to support local administrations in developing holistic urban mobility strategies. This is followed by (i) an overview of the mobility situations in Rome and Madrid and by (ii) an analysis of the objectives, the strategies and the measures set in their respective SUMPs. A comparative analysis of the two SUMPs is proposed in the last paragraph as summary factsheet of the contribution.
description: TeMA - Journal of Land Use, Mobility and Environment, Vol 15 No 2 (2022): The city challenges and external agents. Methods, tools and best practices
Optimal Design and Cascading Failure Evaluation of Remedial Action Schemes
Creators: name: Rangarajan, Aditya
name: Roald, Line
Publisher: name: arXiv
Year: 2023
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Remedial action schemes (RAS) are often seen as an alternative to building new transmission infrastructure to relieve congestion in the system. Consequently, there has been a rapid growth in the number of RAS in electric power systems across the world. However, most RAS rely on fixed parameters and hence cannot adapt to the rapidly evolving nature of the electric grid. In this paper, an optimization framework (RAS-SCOPF) to automate the RAS design procedure is proposed. The proposed framework is a mixed integer quadratic program (MIQP) that chooses a set of optimal RAS actions and minimizes load shed when a contingency occurs. The cost of operation of the RAS-SCOPF is compared against those of standard OPF and SCOPF formulations. Moreover, the risk of cascading failure for the different formulations are evaluated using a DC power flow based cascading failure simulator (CFS). The proposed framework is applied to the RTS-96 24-bus network. The inclusion of RAS allows the system to be operated at a lower cost while preventing any contingency from evolving into cascading blackouts.
MS Gr. class. c. 2 296
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 307 col. 11. Chrysippus, Quaestiones logicae
Drawing by Carlo Orazi
Nearly flat Chern band in periodically strained monolayer and bilayer graphene
Creators: name: Wan, Xiaohan
name: Sarkar, Siddhartha
name: Sun, Kai
name: Lin, Shi-Zeng
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The flat band is a key ingredient for the realization of interesting quantum states for novel functionalities. In this work, we investigate the conditions for the flat band in both monolayer and bilayer graphene under periodic strain. We find topological nearly flat bands with homogeneous distribution of Berry curvature in both systems. The quantum metric of the nearly flat band closely resembles that for Landau levels. For monolayer graphene, the strain field can be regarded as an effective gauge field, while for Bernal-stacked (AB-stacked) bilayer graphene, its role is beyond the description of gauge field. We also provide an understanding of the origin of the nearly flat band in monolayer graphene in terms of the Jackiw-Rebbi model for Dirac fermions with sign-changing mass. Our work suggests strained graphene as a promising platform for strongly correlated quantum states.
The Selberg-Delange method and mean value of arithmetic functions over short intervals
Creators: name: Kaur, Amrinder
name: Sankaranarayanan, Ayyadurai
Publisher: name: arXiv
Year: 2023
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11N37

description: In this paper, we establish a mean value result of arithmetic functions over shorter intervals with the Selberg-Delange method using the Hooley-Huxley contour.
Extended Lyman alpha haloes around individual high-redshift galaxies revealed by MUSE
Creators: name: Wisotzki, L.
name: Bacon, R.
name: Blaizot, J.
name: Brinchmann, J.
name: Herenz, E. C.
name: Schaye, J.
name: Bouché, N.
name: Cantalupo, S.
name: Contini, T.
name: Carollo, C. M.
name: Caruana, J.
name: Courbot, J. -B.
name: Emsellem, E.
name: Kamann, S.
name: Kerutt, J.
name: Leclercq, F.
name: Lilly, S. J.
name: Patrício, V.
name: Sandin, C.
name: Steinmetz, M.
name: Straka, L. A.
name: Urrutia, T.
name: Verhamme, A.
name: Weilbacher, P. M.
name: Wendt, M.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report the detection of extended Ly alpha emission around individual star-forming galaxies at redshifts z = 3-6 in an ultradeep exposure of the Hubble Deep Field South obtained with MUSE on the ESO-VLT. The data reach a limiting surface brightness (1sigma) of ~1 x 10^-19 erg s^-1 cm^-2 arcsec^-2 in azimuthally averaged radial profiles, an order of magnitude improvement over previous narrowband imaging. Our sample consists of 26 spectroscopically confirmed Ly alpha-emitting, but mostly continuum-faint (m_AB >~ 27) galaxies. In most objects the Ly alpha emission is considerably more extended than the UV continuum light. While 5 of the faintest galaxies in the sample show no significantly detected Ly alpha haloes, the derived upper limits suggest that this is just due to insufficient S/N. Ly alpha haloes therefore appear to be (nearly) ubiquitous even for low-mass (~10^8-10^9 M_sun) star-forming galaxies at z>3. We decompose the Ly alpha emission of each object into a compact `continuum-like' and an extended halo component, and infer sizes and luminosities of the haloes. The extended Ly alpha emission approximately follows an exponential surface brightness distribution with a scale length of a few kpc. While these haloes are thus quite modest in terms of their absolute sizes, they are larger by a factor of 5-15 than the corresponding rest-frame UV continuum sources as seen by HST. They are also much more extended, by a factor ~5, than Ly alpha haloes around low-redshift star-forming galaxies. Between ~40% and >90% of the observed Ly alpha flux comes from the extended halo component, with no obvious correlation of this fraction with either the absolute or the relative size of the Ly alpha halo. Our observations provide direct insights into the spatial distribution of at least partly neutral gas residing in the circumgalactic medium of low to intermediate mass galaxies at z > 3.
description: accepted by Astronomy & Astrophysics
Analyzing the effect of local rounding error propagation on the maximal attainable accuracy of the pipelined Conjugate Gradient method
Creators: name: Cools, Siegfried
name: Yetkin, Emrullah Fatih
name: Agullo, Emmanuel
name: Giraud, Luc
name: Vanroose, Wim
Publisher: name: arXiv
Year: 2016
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65F10, 65F50, 65G50, 65Y05, 65Y20

description: Pipelined Krylov subspace methods typically offer improved strong scaling on parallel HPC hardware compared to standard Krylov subspace methods for large and sparse linear systems. In pipelined methods the traditional synchronization bottleneck is mitigated by overlapping time-consuming global communications with useful computations. However, to achieve this communication hiding strategy, pipelined methods introduce additional recurrence relations for a number of auxiliary variables that are required to update the approximate solution. This paper aims at studying the influence of local rounding errors that are introduced by the additional recurrences in the pipelined Conjugate Gradient method. Specifically, we analyze the impact of local round-off effects on the attainable accuracy of the pipelined CG algorithm and compare to the traditional CG method. Furthermore, we estimate the gap between the true residual and the recursively computed residual used in the algorithm. Based on this estimate we suggest an automated residual replacement strategy to reduce the loss of attainable accuracy on the final iterative solution. The resulting pipelined CG method with residual replacement improves the maximal attainable accuracy of pipelined CG, while maintaining the efficient parallel performance of the pipelined method. This conclusion is substantiated by numerical results for a variety of benchmark problems.
description: 26 pages, 6 figures, 2 tables, 4 algorithms
Spin squeezing in open Heisenberg spin chains
Creators: name: Yanes, Tanausú Hernández
name: Žlabys, Giedrius
name: Płodzień, Marcin
name: Burba, Domantas
name: Sinkevičienė, Mažena Mackoit
name: Witkowska, Emilia
name: Juzeliūnas, Gediminas
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Spin squeezing protocols successfully generate entangled many-body quantum states, the key pillars of the second quantum revolution. In our recent work [Phys. Rev. Lett. 129, 090403 (2022)] we showed that spin squeezing described by the one-axis twisting model could be generated in the Heisenberg spin-1/2 chain with periodic boundary conditions when accompanied by a position-dependent spin-flip coupling induced by a single laser field. This work shows analytically that the change of boundary conditions from the periodic to the open ones significantly modifies spin squeezing dynamics. A broad family of twisting models can be simulated by the system in the weak coupling regime, including the one- and two-axis twisting under specific conditions, providing the Heisenberg level of squeezing and acceleration of the dynamics. Full numerical simulations confirm our analytical findings.
MS Gr. class. c. 2 297
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 307 col. 12. Chrysippus, Quaestiones logicae
Drawing by Carlo Orazi
Improved Spectrophotometric Calibration of the SDSS-III BOSS Quasar Sample
Creators: name: Margala, Daniel
name: Kirkby, David
name: Dawson, Kyle
name: Bailey, Stephen
name: Blanton, Michael
name: Schneider, Donald P.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present a model for spectrophotometric calibration errors in observations of quasars from the third generation of the Sloan Digital Sky Survey (SDSS-III) Baryon Oscillation Spectroscopic Survey (BOSS) and describe the correction procedure we have developed and applied to this sample. Calibration errors are primarily due to atmospheric differential refraction and guiding offsets during each exposure. The corrections potentially reduce the systematics for any studies of BOSS quasars, including the measurement of baryon acoustic oscillations using the Lyman-$α$ forest. Our model suggests that, on average, the observed quasar flux in BOSS is overestimated by $\sim 19\%$ at 3600 Å and underestimated by $\sim 24\%$ at 10,000 Å. Our corrections for the entire BOSS quasar sample are publicly available.
description: 10 pages, 15 figures
Caroxylon Thunberg 1782
Creators: name: Mucina, Ladislav
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Caryophyllales
Amaranthaceae
Caroxylon

description: Caroxylon Thunberg (1782: 239–240).
 Type: ― Caroxylon salsola Thunberg (1782: 240–241).
 – Sarcomorphis Bojer ex Moquin-Tandon in Candolle (1849: 180), nom. inval. (Art. 36.1c of ICN, McNeill et al. 2012).
 Note on typification of the generic name: ― Thunberg (1782: 239–241) in the protologue of the genus Caroxylon introduced and validly described only one species, Caroxylon salsola, and this species should be considered the type of the genus. Brullo et al. (2013) claimed that Caroxylon was typified by Botschantzev (1974d) and suggested that the latter author chose S. aphylla (erroneously cited as ‘ S. aphilla ’) as the type of the genus. In fact, however, Botschantzev (1974d) has typified subsection Caroxylon of the section Caroxylon (in Salsola). The Botchantzev’s (1974d) typification is in error because at the time of description of the genus there was only one element (one species) available for typification, Caroxylon salsola.
description: Published as part of Mucina, Ladislav, 2017, Caroxylon (Chenopodiaceae s. str.) in continental southern Africa and Madagascar: a preliminary nomenclatural synopsis and biogeographical considerations, pp. 151-178 in Phytotaxa 312 (2) on page 155, DOI: 10.11646/phytotaxa.312.2.1, http://zenodo.org/record/13701544
A Low-Noise CMOS Pixel Direct Charge Sensor, Topmetal-II-
Creators: name: An, Mangmang
name: Chen, Chufeng
name: Gao, Chaosong
name: Han, Mikyung
name: Ji, Rong
name: Li, Xiaoting
name: Mei, Yuan
name: Sun, Quan
name: Sun, Xiangming
name: Wang, Kai
name: Xiao, Le
name: Yang, Ping
name: Zhou, Wei
Publisher: name: arXiv
Year: 2015
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: We report the design and characterization of a CMOS pixel direct charge sensor, Topmetal-II-, fabricated in a standard 0.35um CMOS Integrated Circuit process. The sensor utilizes exposed metal patches on top of each pixel to directly collect charge. Each pixel contains a low-noise charge-sensitive preamplifier to establish the analog signal and a discriminator with tunable threshold to generate hits. The analog signal from each pixel is accessible through time-shared multiplexing over the entire array. Hits are read out digitally through a column-based priority logic structure. Tests show that the sensor achieved a <15e- analog noise and a 200e- minimum threshold for digital readout per pixel. The sensor is capable of detecting both electrons and ions drifting in gas. These characteristics enable its use as the charge readout device in future Time Projection Chambers without gaseous gain mechanism, which has unique advantages in low background and low rate-density experiments.
Chung's Law of the Iterated Logarithm for a Class of Stochastic Heat Equations
Creators: name: Chen, Jiaming
Publisher: name: arXiv
Year: 2023
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60H15(Primary), 60G17(Secondary)

description: We establish a Chung-type law of the iterated logarithm for the solutions of a class of stochastic heat equations driven by a multiplicative noise whose coefficient depends on the solution, and this dependence takes us away from Gaussian setting. Based on the literature on small ball probabilities and the technique of freezing coefficients, the limiting constant in Chung's law of the iterated logarithm can be evaluated almost surely.
description: 7 pages
Spontaneous emergence of non-planar electron orbits during direct laser acceleration by a linearly polarized laser pulse
Creators: name: Arefiev, A. V.
name: Khudik, V. N.
name: Robinson, A. P. L.
name: Shvets, G.
name: Willingale, L.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: An electron irradiated by a linearly polarized relativistic intensity laser pulse in a cylindrical plasma channel can gain significant energy from the pulse. The laser electric and magnetic fields drive electron oscillations in a plane making it natural to expect the electron trajectory to be flat. We show that strong modulations of the relativistic $γ$-factor associated with the energy enhancement cause the free oscillations perpendicular to the plane of the driven motion to become unstable. As a consequence, out of plane displacements grow to become comparable to the amplitude of the driven oscillations and the electron trajectory becomes essentially three-dimensional, even if at an early stage of the acceleration it was flat. The development of the instability profoundly affects the x-ray emission, causing considerable divergence of the radiation perpendicular to the plane of the driven oscillations, while also reducing the overall emitted energy.
Sustainable cities and communities: the road towards SDG 11
Creators: name: Franco, Stefano
Publisher: name: TeMA - Journal of Land Use, Mobility and Environment
Year: 2022

description: Starting from the relationship between urban planning and mobility management, TeMA has gradually expanded the view of the covered topics, always following a rigorous scientific in-depth analysis. This section of the Journal, Review Notes, is the expression of a continuous updating of emerging topics concerning relationships among urban planning, mobility and environment, through a collection of short scientific papers. The Review Notes are made of four parts. Each section examines a specific aspect of the broader information storage within the main interests of TeMA Journal. In particular, the Economy, business and land use section aims at presenting recent advancements on relevant topics that underlie socio-economic relationships between firms and territories. The present note aims at understanding where we are in the path towards SDG11 and the strategies to achieve it.
description: TeMA - Journal of Land Use, Mobility and Environment, Vol 15 No 2 (2022): The city challenges and external agents. Methods, tools and best practices
MS Gr. class. c. 2 298
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 307 col. 13. Chrysippus, Quaestiones logicae
Drawing by Carlo Orazi
Phase spaces that cannot be cloned in classical mechanics
Creators: name: Yao, Yuan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mathematical Physics (math-ph)
subject: Symplectic Geometry (math.SG)
subject: Classical Physics (physics.class-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: The quantum no cloning theorem is an essential result in quantum information theory. Following this idea, we give a physically natural definition of cloning in the context of classical mechanics using symplectic geometry, building on work of Fenyes. We observe, following Fenyes, any system with phase space $(\mathbb{R}^{2N}, dx_i\wedge dy_i)$ can be cloned in our definition. However, we show that if $(M,ω)$ can be cloned in our definition, then $M$ must be contractible. For instance, this shows the simple pendulum cannot be cloned in Hamiltonian mechanics. We further formulate a robust notion of approximate cloning, and show that if $(M, ω)$ can be approximately cloned, then $M$ is contractible. We give interpretations of our results and in some special cases reconcile our no cloning theorems with the general experience that classical information is clonable. Finally we point to new directions of research, including a connection of our result with the classical measurement problem.
description: Added some sections. final version
Beyond Facebook: A Teen's Guide to the Internet
Creators: name: Dyer, Allison L.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2010
Subjects: Internet--Programmed instruction--Young adults' literature
Information literacy--Handbooks, manuals, etc
Electronic information resource literacy--Young adults' literature

description: This master's paper contains an instructional guide for teenagers to assist them in  developing Internet-related information literacy skills. The guide is composed of four  sections, three of which correspond to the primary reasons teenagers use the Internet: to  create original content, to conduct personal and educational research, and engage in  online commerce. A fourth section on copyright and intellectual property has been added  to complement the other information. In addition to the instructional guide, a background  paper detailing the research and methodology behind the guide is also included.
Caroxylon acocksii Mucina 2017, comb. nov.
Creators: name: Mucina, Ladislav
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Caryophyllales
Amaranthaceae
Caroxylon
Caroxylon acocksii

description: 1. Caroxylon acocksii (Botsch.) Mucina comb. nov.
 Basionym: ― Salsola acocksii Botschantzev (1973: 815).
 Type: ― SOUTH-WEST AFRICA [NAMIBIA]. Warmbad: 20 miles N of Ariamsvlei, Driedoring-veld, ± 2700 ft elev., 17 March 1956, Acocks 18809 (holotype K-000243908!; isotypes LE-00011753!, LE-00011754!, M-0107442!, PRE-0375528-0!).
 Distribution: ― Namibia: Ariamsvlei (SE Karas region); South Africa? (NC?; Botschantzev 1974a, Germishuizen et al. 2006).
description: Published as part of Mucina, Ladislav, 2017, Caroxylon (Chenopodiaceae s. str.) in continental southern Africa and Madagascar: a preliminary nomenclatural synopsis and biogeographical considerations, pp. 151-178 in Phytotaxa 312 (2) on page 155, DOI: 10.11646/phytotaxa.312.2.1, http://zenodo.org/record/13701544
Real-time hybrid quantum-classical computations for trapped-ions with Python control-flow
Creators: name: Schmale, Tobias
name: Temesi, Bence
name: Trittschanke, Niko
name: Pulido-Mateo, Nicolas
name: Elenskiy, Ilya
name: Krinner, Ludwig
name: Dubielzig, Timko
name: Ospelkaus, Christian
name: Weimer, Hendrik
name: Borcherding, Daniel
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In recent years, the number of hybrid algorithms that combine quantum and classical computations has been continuously increasing. These two approaches to computing can mutually enhance each others' performances thus bringing the promise of more advanced algorithms that can outmatch their pure counterparts. In order to accommodate this new class of codes, a proper environment has to be created, which enables the interplay between the quantum and classical hardware. For many of these hybrid processes the coherence time of the quantum computer arises as a natural time constraint, making it crucial to minimize the classical overhead. For ion-trap quantum computers however, this is a much less limiting factor than with superconducting technologies, since the relevant timescale is on the order of seconds instead of microseconds. In fact, this long coherence time enables us to develop a scheme for real-time control of quantum computations in an interpreted programming language like Python. In particular, compilation of all instructions in advance is not necessary, unlike with superconducting qubits. This keeps the implementation of hybrid algorithms simple and also lets users benefit from the rich environment of existing Python libraries. In order to show that this approach of interpreted quantum-classsical computations (IQCC) is feasible, we bring real-world examples and evaluate them in realistic benchmarks.
description: 8 pages, 6 figures, 1 table
Climate adaptation in the Mediterranean: heat waves
Creators: name: Guida, Carmen
Publisher: name: TeMA - Journal of Land Use, Mobility and Environment
Year: 2022

description: Starting from the relationship between urban planning and mobility management, TeMA has gradually expanded the view of the covered topics, always remaining in the groove of rigorous scientific in-depth analysis. This section of the Journal, Review Notes, is the expression of a continuous updating of emerging topics concerning relationships between urban planning, mobility and environment, through a collection of short scientific papers written by young researchers. The Review Notes are made of four parts. Each section examines a specific aspect of the broader information storage within the main interests of TeMA Journal. In particular, the Urban planning literature review section aims at presenting recent books and journals, within global scientific panorama, on selected topics and issues. This contribution aims at delving into the most severe effects due to heat waves and presenting three interesting and significant scientific books and journal that present effective adaptation strategies to limit climate crisis and improve Mediterranean resilience towards more frequent and severe heat waves. The second contribution of the Review Notes for TeMA vo. 15 highlights the need for integrated action to address the climate crisis in the Mediterranean region, bringing together the strengths and weaknesses of its shores, despite social, economic and political differences. Moreover, the extreme weather events that are occurring throughout Europe, from the south to the north, show how the Mediterranean area is particularly sensitive to climate change-related events.
description: TeMA - Journal of Land Use, Mobility and Environment, Vol 15 No 2 (2022): The city challenges and external agents. Methods, tools and best practices
Search for flavour-changing neutral current top quark decays $t\to Hq$ in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
Creators: name: ATLAS Collaboration
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A search for flavour-changing neutral current decays of a top quark to an up-type quark ($q=u, c$) and the Standard Model Higgs boson, where the Higgs boson decays to $b\bar{b}$, is presented. The analysis searches for top quark pair events in which one top quark decays to $Wb$, with the $W$ boson decaying leptonically, and the other top quark decays to $Hq$. The search is based on $pp$ collisions at $\sqrt{s}=8$ TeV recorded in 2012 with the ATLAS detector at the CERN Large Hadron Collider and uses an integrated luminosity of 20.3 fb$^{-1}$. Data are analysed in the lepton-plus-jets final state, characterised by an isolated electron or muon and at least four jets. The search exploits the high multiplicity of $b$-quark jets characteristic of signal events, and employs a likelihood discriminant that uses the kinematic differences between the signal and the background, which is dominated by $t\bar{t} \to WbWb$ decays. No significant excess of events above the background expectation is found, and observed (expected) 95% CL upper limits of 0.56% (0.42%) and 0.61% (0.64%) are derived for the $t\to Hc$ and $t\to Hu$ branching ratios respectively. The combination of this search with other ATLAS searches in the $H \to γγ$ and $H\to WW^*, ττ$ decay modes significantly improves the sensitivity, yielding observed (expected) 95% CL upper limits on the $t\to Hc$ and $t\to Hu$ branching ratios of 0.46% (0.25%) and 0.45% (0.29%) respectively. The corresponding combined observed (expected) upper limits on the $|λ_{tcH}|$ and $|λ_{tuH}|$ couplings are 0.13 (0.10) and 0.13 (0.10) respectively. These are the most restrictive direct bounds on $tqH$ interactions measured so far.
description: 44 pages + author list + cover pages (61 pages total), 14 figures, 5 tables, submitted to JHEP. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2014-14/
NextGenerationEU in major Italian cities
Creators: name: Gargiulo, Carmela
name: Guida, Nicola
name: Sgambati, Sabrina
Publisher: name: TeMA - Journal of Land Use, Mobility and Environment
Year: 2022

description: The European Union has reacted to the pandemic with the program NextGenerationEU (NGEU) to boost the recovery and development of the EU countries by relying on National Recovery and Resilience Plans (NRRPs). Given the pivotal role of cities, and in particular major cities, as engines of social and economic growth, the success of the program necessarily depends on the increase of urban competitiveness, intended as an intrinsic characteristic of cities and a fundamental aspect to transforming resources and challenges into opportunities for territorial development. This paper examines the relationships between major cities and the NRRP in the Italian context, firstly highlighting the role of cities in the plan’s different phases and then drawing attention to the missions and investments in which the urban dimension is more significant. Furthermore, it highlights how the NRRP goals achievement in cities can lead to higher levels of competitiveness and support the national economic recovery. One of the main results is the identification of five Macro-areas of Competitiveness for the urban dimension: Tourism and culture, Digitalization/smartness, Green transition, Sustainable mobility, Social Inclusion & Cohesion. Additionally, the paper discusses the allocation of the European resources among major Italian cities in relation to their urban suitability and vocations.
description: TeMA - Journal of Land Use, Mobility and Environment, Vol 15 No 2 (2022): The city challenges and external agents. Methods, tools and best practices
Accelerate urban sustainability through European action, optimization models and decision support tools for energy planning
Creators: name: Gaglione, Federica
name: Etigo, David Ania Ayiine
Publisher: name: TeMA - Journal of Land Use, Mobility and Environment
Year: 2022

description: Starting from the relationship between urban planning and mobility management, TeMA has gradually expanded the view of the covered topics, always following a rigorous scientific in-depth analysis. This section of the Journal, Review Notes, is a continuous update about emerging topics concerning relationships among urban planning, mobility, and environment, thanks to a collection of short scientific papers written by young researchers. The Review Notes are made up of five parts. Each section examines a specific aspect of the broader information storage within the main interests of the TeMA Journal. In particular: the Town Planning International Rules and Legislation. Section aims at presenting the latest updates in the territorial and urban legislative sphere. The theme of energy and its related energy consumption is a leading theme in the European scientific debate for the continuous pursuit of urban development. In this direction, the contribution of this review notes illustrates on the one hand optimization models and decision support tools produced so far to improve the energy organization at different urban scales and on the other highlights within the cards, strategies and actions carried out forward from the European Union to have a cognitive and operational framework on energy planning and on how to accelerate the sustainability of urban systems.
description: TeMA - Journal of Land Use, Mobility and Environment, Vol 15 No 2 (2022): The city challenges and external agents. Methods, tools and best practices
Heavy baryons in the large Nc limit
Creators: name: Albertus, C.
name: Arriola, E. Ruiz
name: Fernando, I. P.
name: Goity, J. L.
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: It is shown that in the large Nc limit heavy baryon masses can be estimated quantitatively in a 1/Nc expansion using the Hartree approximation. The results are compared with available lattice calculations for different values of the ratio between the square root of the string tension and the heavy quark mass tension independent of Nc. Using a potential adjusted to agree with the one obtained in lattice QCD, a variational analysis of the ground state spin averaged baryon mass is performed using Gaussian Hartree wave functions. Relativistic corrections through the quark kinetic energy are included. The results provide good estimates for the first sub-leading in 1/Nc corrections.
description: 7 pages, 3 figures
Caroxylon adiscum Mucina 2017, comb. nov.
Creators: name: Mucina, Ladislav
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Caryophyllales
Amaranthaceae
Caroxylon
Caroxylon adiscum

description: 2. Caroxylon adiscum (Botsch.) Mucina comb. nov.
 Basionym: ― Salsola adisca Botsch. in Botanicheskii Zhurnal 59: 536 (1974c).
 Type: ― SOUTH AFRICA. Kimberley, September 1934, sine collectore (holotype K-K-000243991!; isotype LE-00011755!).
 Distribution: ― South Africa (FS, NC, WC): Beaufort West, western Bushmanland, western Free State (Fauresmith, Luckhoff).
description: Published as part of Mucina, Ladislav, 2017, Caroxylon (Chenopodiaceae s. str.) in continental southern Africa and Madagascar: a preliminary nomenclatural synopsis and biogeographical considerations, pp. 151-178 in Phytotaxa 312 (2) on page 155, DOI: 10.11646/phytotaxa.312.2.1, http://zenodo.org/record/13701544
MS Gr. class. c. 2 299
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 307 col. 14. Chrysippus, Quaestiones logicae
Drawing by Carlo Orazi
K-semistability of cscK manifolds with transcendental cohomology class
Creators: name: Dyrefelt, Zakarias Sjöström
Publisher: name: arXiv
Year: 2016
Subjects: subject: Differential Geometry (math.DG)
subject: Complex Variables (math.CV)
subject: FOS: Mathematics

description: We prove that constant scalar curvature Kähler (cscK) manifolds with transcendental cohomology class are K-semistable, naturally generalising the situation for polarised manifolds. Relying on a very recent result by R. Berman, T. Darvas and C. Lu regarding properness of the K-energy, it moreover follows that cscK manifolds with finite automorphism group are uniformly K-stable. As a main step of the proof we establish, in the general Kähler setting, a formula relating the (generalised) Donaldson-Futaki invariant to the asymptotic slope of the K-energy along weak geodesic rays.
description: Added remark 1.2 and Theorem A b) on uniform K-stability, and updated the abstract accordingly. Added proof of Proposition 2.3. To appear in J. Geom. Anal
Investigation of Umbral Dots with the New Vacuum Solar Telescope
Creators: name: Ji, Kaifan
name: Jiang, Xia
name: Feng, Song
name: Yang, Yunfei
name: Deng, Hui
name: Wang, Feng
Publisher: name: arXiv
Year: 2015
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Umbral dots (UDs) are small isolated brightenings observed in sunspot umbrae. They are convective phenomena existing inside umbrae. UDs are usually divided into central UDs (CUDs) and peripheral UDs (PUDs) according to their positions inside an umbra. Our purpose is to investigate UD properties and analyze their relationships, and further to find whether or not the properties depend on umbral magnetic field strengths. Thus, we selected high-resolution TiO images of four active regions (ARs) taken under the best seeing conditions with the \textit{New Vacuum Solar Telescope} in the Fuxian Solar Observatory of the Yunnan Astronomical Observatory, China. The four ARs (NOAA 11598, 11801, 12158, and 12178) include six sunspots. A total of 1220 CUDs and 603 PUDs were identified. Meanwhile, the radial component of the vector magnetic field of the sunspots taken with the \textit{Helioseismic and Magnetic Imager} on-board the \textit{Solar Dynamics Observatory} was used to analyze relationships between UD properties and umbral magnetic field strengths. We find that diameters and lifetimes of UDs exhibit an increasing trend with the brightness, but velocities do not. Moreover, diameters, intensities, lifetimes and velocities depend on the surrounding magnetic field. A CUD diameter was found larger, the CUD brighter, its lifetime longer, and its motion slower in a weak umbral magnetic field environment than in a strong one.
description: 16 Pages, 7 Figures, and 5 Tables, accepted for publication in Solar Physics
Trigger urban and regional planning to cope with seismic risks: management, evaluation and mitigation
Creators: name: La Greca, Paolo
Publisher: name: TeMA - Journal of Land Use, Mobility and Environment
Year: 2022

description: This article - published in Italian in 1995 with the title “Verso un progetto mirato all’organizzazione e alla gestione di un piano di mitigazione dei rischi sismici” in E.D.Sanfilippo e P. La Greca (eds) Piano e Progetto nelle aree a rischio sismico/Planning and design in seismic risk areas, Gangheri Editore, ISBN 88-7448-520-4, Roma – is published again in this new section of TeMA Journal, Evergreen, in its literal English translation. This section aims at drawing the attention of the international scientific community to papers that, despite the passing of time, still present elements of significative scientific interest – insights, anticipations and reflections – enough to deserve careful read back. Abstract Earthquakes account for the most relevant natural risks with a high index of unpredictability that afflict many countries in the world, in many of which the level of development and socio-economic conditions do not allow an adequate response to the effects caused by catastrophes. The unsuitability of public structures and the lack of awareness and consciousness within public opinion towards seismic risk, which is already severely disregarded in industrialised countries, is accentuated in developing countries where populations are daily harassed by the struggle to satisfy the most basic needs.
description: TeMA - Journal of Land Use, Mobility and Environment, Vol 15 No 2 (2022): The city challenges and external agents. Methods, tools and best practices