cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Causal Fermion Systems: A Quantum Space-Time Emerging from an Action Principle
Creators: name: Finster, Felix
name: Grotz, Andreas
name: Schiefeneder, Daniela
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Causal fermion systems are introduced as a general mathematical framework for formulating relativistic quantum theory. By specializing, we recover earlier notions like fermion systems in discrete space-time, the fermionic projector and causal variational principles. We review how an effect of spontaneous structure formation gives rise to a topology and a causal structure in space-time. Moreover, we outline how to construct a spin connection and curvature, leading to a proposal for a "quantum geometry" in the Lorentzian setting. We review recent numerical and analytical results on the support of minimizers of causal variational principles which reveal a "quantization effect" resulting in a discreteness of space-time. A brief survey is given on the correspondence to quantum field theory and gauge theories.
description: 23 pages, LaTeX, 2 figures, footnote added on page 9
Learning to decode cognitive states from brain images
Creators: name: Mitchell, Tom M.
name: Hutchinson, Rebecca
name: Niculescu, Radu S.
name: Pereira, Francisco
name: Xuerui  Wang
name: Just, Marcel
name: Newman, Sharlene D.
Publisher: name: Carnegie Mellon University
Year: 2004
Subjects: subject: 170199 Psychology not elsewhere classified
subject: FOS: Psychology

description: Department of Psychology
Cissidium nishikawai Sawada 2008
Creators: name: Darby, Michael
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Ptiliidae
Cissidium
Cissidium nishikawai

description: Cissidium nishikawai Sawada, 2008
Fig. 96
Material examined
Paratype JAPAN • 1 ♀; Gaji-rindo, Kunigami-son, Okinawa Pref.; 21 Oct. 1987; Y. Nioshikawa leg.; YS. The specimen is thickly covered with glue and the details are difficult to make out, no attempt was made to turn it over to inspect the underside. Figure 96C is copied from Sawada (2008).
Supplementary description
The following description amplifies the type description of Sawada (2008) to conform with the entries in the present paper.
SIZE. Habitus (Fig. 96A), length 0.69 mm.
COLOUR. Reddish brown, antennae, legs and pubescence dusky yellow.
HEAD. With a transverse depression behind the eyes, width across eyes 0.18 mm; antennomeres III–XI, length 0.29 mm terminally globular.
PRONOTUM. Length 0.19 mm, width 0.28 mm, shallowly foveolate and sparsely pubescent; side margins rounded to rectangular hind angles, bordered, the border continuing along the entire posterior margin including the emargination in front of the scutellum (Fig. 96B).
ELYTRA. Length 0.45 mm, width 0.41 mm, pubescent.
MESOVENTRITE. Lateral margins serrate; humeri toothed (Fig. 96C).
METAVENTRITE. Mesocoxal posterior borders serrate
GENITALIA. Female spermatheca globular. Males not known.
Remarks
This is the only Japanese species in this group apart from C. shibatai Sabada, 2008. It may be distinguished from that species by the much wider pronotal base.
description: Published as part of Darby, Michael, 2020, A revision of Cissidium Motschulsky (Coleoptera: Ptiliidae) with seventy seven new species, pp. 1-188 in European Journal of Taxonomy 622 on page 152, DOI: 10.5852/ejt.2020.622, http://zenodo.org/record/3777282
Equivariant Lefschetz maps for simplicial complexes and smooth manifolds
Creators: name: Emerson, Heath
name: Meyer, Ralf
Publisher: name: arXiv
Year: 2007
Subjects: subject: K-Theory and Homology (math.KT)
subject: FOS: Mathematics
subject: 19K35, 46L80

description: Let X be a locally compact space with a continuous proper action of a locally compact group G. Assuming that X satisfies a certain kind of duality in equivariant bivariant Kasparov theory, we can enrich the classical construction of Lefschetz numbers to equivariant K-homology classes. We compute the Lefschetz invariants for self-maps of finite-dimensional simplicial complexes and of self-maps of smooth manifolds. The resulting invariants are independent of the extra structure used to compute them. Since smooth manifolds can be triangulated, we get two formulas for the same Lefschetz invariant in these cases. The resulting identity is closely related to the equivariant Lefschetz Fixed Point Theorem of Luck and Rosenberg.
description: Minor revisions, affecting some theorem numbers
Self-Adjointness in Klein-Gordon Theory on Globally Hyperbolic Spacetimes
Creators: name: Much, Albert
name: Oeckl, Robert
Publisher: name: arXiv
Year: 2018
Subjects: subject: Mathematical Physics (math-ph)
subject: Operator Algebras (math.OA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We prove essential self-adjointness of the spatial part of the linear Klein-Gordon operator with external potential for a large class of globally hyperbolic manifolds. The proof is conducted by a fusion of new results concerning globally hyperbolic manifolds, the theory of weighted Hilbert spaces and related functional analytic advances.
description: 12 pages; v2: generalized main result, added section on geodesic completeness, minor corrections, added references; v3: improved structure of Sections 4 and 5, minor corrections, added references; v4: final corrections
A 2-3 billion year old major merger paradigm for the Andromeda galaxy and its outskirts
Creators: name: Hammer, F.
name: Yang, Y. B.
name: Wang, J. L.
name: Ibata, R.
name: Flores, H.
name: Puech, M.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Recent observations of our neighbouring galaxy M31 have revealed that its disk was shaped by widespread events. The evidence for this includes the high dispersion ($V/σ$ $\le$ 3) of stars older than 2 Gyr, and a global star formation episode, 2-4 Gyr ago. Using the modern hydrodynamical code, GIZMO, we have performed 300 high-resolution simulations to explore the extent to which these observed properties can be explained by a single merger. We find that the observed M31 disk resembles models having experienced a 4:1 merger, in which the nuclei coalesced 1.8-3 Gyr ago, and where the first passage took place 7 to 10 Gyr ago at a large pericentre distance (32 kpc). We also show that within a family of orbital parameters, the Giant Stream (GS) can be formed with various merger mass-ratios, from 2:1 to 300:1. A recent major merger may be the only way to create the very unusual age-dispersion relation in the disk. It reproduces and explains the long-lived 10 kpc ring, the widespread and recent star formation event, the absence of a remnant of the GS progenitor, the apparent complexity of the 3D spatial distribution of the GS, the NE and G Clumps and their formation process, and the observed slope of the halo profile. These modelling successes lead us to propose that the bulk of the substructure in the M31 halo, as well as the complexity of the inner galaxy, may be attributable to a single major interaction with a galaxy that has now fully coalesced with Andromeda.
description: Accepted in Monthly Notices of the Royal Astronomical Society, December 19, 2017, 16 pages, 18 Figures, 3 Tables
Learning to Achieve Perfect Time Sharing: Architectural Implications of Hazeltine, Teague, & Ivry (2002)
Creators: name: Anderson, John R.
name: Taatgen, Niels
name: Byrne, Michael D.
Publisher: name: Carnegie Mellon University
Year: 2004
Subjects: subject: 170199 Psychology not elsewhere classified
subject: FOS: Psychology

description: E. Hazeltine, D. Teague, and R. B. Ivry (see record 2002-02997-003) have presented data that have been interpreted as evidence against a central bottleneck. This article describes simulations of their Experiments 1 and 4 in the ACT-R cognitive architecture, which does possess a central bottleneck in production execution. The simulation model is capable of accounting for the emergence of near-perfect timesharing in Experiment 1 and the detailed data on the distribution of response times from Experiment 4. With practice, the central bottleneck in ACT-R will be reduced to a maximum of 50 ms (1 production cycle) and can often be much less, depending on timing of stages and variability in their times. The authors also show, with a mathematical analysis of E. Hazeltine et al.'s Experiment 2, that the expected dual costs for these kinds of highly practiced tasks will be small in many circumstances, often under 10 ms.
Generating and Estimating Nonverbal Alphabets for Situated and Multimodal Communications
Creators: name: Hamotskyi, Serhii
name: Stirenko, Sergii
name: Gordienko, Yuri
name: Rojbi, Anis
Publisher: name: arXiv
Year: 2017
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Computation and Language (cs.CL)
subject: Computers and Society (cs.CY)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: In this paper, we discuss the formalized approach for generating and estimating symbols (and alphabets), which can be communicated by the wide range of non-verbal means based on specific user requirements (medium, priorities, type of information that needs to be conveyed). The short characterization of basic terms and parameters of such symbols (and alphabets) with approaches to generate them are given. Then the framework, experimental setup, and some machine learning methods to estimate usefulness and effectiveness of the nonverbal alphabets and systems are presented. The previous results demonstrate that usage of multimodal data sources (like wearable accelerometer, heart monitor, muscle movements sensors, braincomputer interface) along with machine learning approaches can provide the deeper understanding of the usefulness and effectiveness of such alphabets and systems for nonverbal and situated communication. The symbols (and alphabets) generated and estimated by such methods may be useful in various applications: from synthetic languages and constructed scripts to multimodal nonverbal and situated interaction between people and artificial intelligence systems through Human-Computer Interfaces, such as mouse gestures, touchpads, body gestures, eyetracking cameras, wearables, and brain-computing interfaces, especially in applications for elderly care and people with disabilities.
description: 5 pages, 5 figures
Selected topics on tau physics
Creators: name: Pich, Antonio
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The B Factories have generated a large amount of new results on the tau lepton. The present status of some selected topics on tau physics is presented: charged-current universality tests, bounds on lepton-flavour violation, the determination of alpha_s from the inclusive tau hadronic width, and the measurement of |V_{us}| through the Cabibbo-suppressed decays of the tau lepton.
description: Invited talk at the XXXI International Conference of Theoretical Physics, "Matter to the Deepest", Ustron, Poland, 5-11 September 2007
Cissidium obscenum Darby 2020, sp. nov.
Creators: name: Darby, Michael
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Ptiliidae
Cissidium
Cissidium obscenum

description: Cissidium obscenum sp. nov.
urn:lsid:zoobank.org:act: 83CD06F2-2E72-4AE2-9841-AF1D5238BA59
Figs 7E, 97
Etymology
Johnson ms name (as obscoenum) from the Latin adjective ‘ obscenus ’ and probably relating to the large size.
Material examined
Holotype PERU • ♂; “E PERU”, road from Tarapoto to Yurimagua; forest litter on mountain slope; H. Franz leg.; MMUE.
Description
SIZE. Habitus (Fig 97A), length 1.00 mm.
COLOUR. Yellow brown, shining, antennae, legs and pubescence dusky yellow.
HEAD. Without a clear transverse depression behind the eyes; width across eyes 0.27 mm; antennomeres III–XI length 0.46 mm, III–IX length 0.29 mm, X–XI length 0.17 mm; mentum as Fig. 4A.
PRONOTUM. Length 0.29 mm, width 0.43 mm, pubescent, shallowly foveolate near base; sides sharply angled then almost parallel-sided to rounded rectangular hind angles, front angles rounded, lateral borders continued along the basal margin to the angulate medial emargination opposite the scutellum (Fig. 97B).
ELYTRA. Length 0.65 mm, width 0.51 mm, pubescent, not foveolate, obliquely truncate.
MESOVENTRITE. Collar with a parallel-sided median extension widening slightly anteriorly and with rounded posterior corners, posterior margin not raised continuing directly into the keel; keel long, with ± six setae, tapering to rounded tip at base of mesocoxae; mesoventral lateral margins rounded, effaced posteriorly without obvious serrations; humeri toothed (Fig. 97C).
METAVENTRITE. With a setose depression medially, the setae confined to the borders (Fig. 7E), spines not visible, length 0.16 mm, width between metacoxae 0.12 mm; mesocoxal borders not serrate.
WINGS. Macropterous.
GENITALIA. Male aedeagus long as Fig. 6K but without the terminal hook. Females not known.
Remarks
The three Peruvian species of Cissidium all fall into this group, this is distinguished from the others by its large size.
description: Published as part of Darby, Michael, 2020, A revision of Cissidium Motschulsky (Coleoptera: Ptiliidae) with seventy seven new species, pp. 1-188 in European Journal of Taxonomy 622 on pages 153-155, DOI: 10.5852/ejt.2020.622, http://zenodo.org/record/3777282
The NuSTAR Extragalactic Surveys: X-ray spectroscopic analysis of the bright hard-band selected sample
Creators: name: Zappacosta, L.
name: Comastri, A.
name: Civano, F.
name: Puccetti, S.
name: Fiore, F.
name: Aird, J.
name: Del Moro, A.
name: Lansbury, G. B.
name: Lanzuisi, G.
name: Goulding, A.
name: Mullaney, J. R.
name: Stern, D.
name: Ajello, M.
name: Alexander, D. M.
name: Ballantyne, D. R.
name: Bauer, F. E.
name: Brandt, W. N.
name: Chen, C. -T. J.
name: Farrah, D.
name: Harrison, F. A.
name: Gandhi, P.
name: Lanz, L.
name: Masini, A.
name: Marchesi, S.
name: Ricci, C.
name: Treister, E.
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We discuss the spectral analysis of a sample of 63 Active Galactic Nuclei (AGN) detected above a limiting flux of $S(8-24$ keV$)=7\times10^{-14}$ erg/s/cm$^2$ in the multi-tiered NuSTAR Extragalactic Survey program. The sources span a redshift range z=0-2.1 (median $\langle$z$\rangle=$0.58). The spectral analysis is performed over the broad 0.5-24 keV energy range, combining NuSTAR with Chandra and/or XMM-Newton data and employing empirical and physically motivated models. This constitutes the largest sample of AGN selected at $ >10$ keV to be homogeneously spectrally analyzed at these flux levels. We study the distribution of spectral parameters such as photon index, column density ($N_{\rm H}$), reflection parameter ($R$) and 10-40 keV luminosity ($L_{X}$). Heavily obscured ($\log [N_{\rm H}/cm^{-2}]\ge23$) and Compton Thick (CT; $\log [N_{\rm H}/cm^{-2}]\ge24$) AGN constitute $\sim$25% (15-17 sources) and $\sim$2-3% ( 1-2 sources) of the sample, respectively. The observed $N_{\rm H}$ distribution fairly agrees with predictions of Cosmic X-ray Background population synthesis models (CXBPSM). We estimate the intrinsic fraction of AGN as a function of $N_{H}$, accounting for the bias against obscured AGN in a flux-selected sample. The fraction of CT AGN relative to $\log [N_{\rm H}/cm^{-2}]=20-24$ AGN is poorly constrainted, formally in the range 2-56% (90% upper limit of 66%). We derived a fraction ($f_{abs}$) of obscured AGN ($\log [N_{\rm H}/cm^{-2}]=22-24$) as a function of $L_{X}$ in agreement with CXBPSM and previous z < 1 X-ray determinations. Furthermore $f_{abs}$ at z=0.1-0.5 and $\log (L_{X}/erg$ $s^{-1})\approx43.6-44.3$ agrees with observational measurements/trends obtained over larger redshift intervals. We report a significant anti-correlation of $R$ with $L_{X}$ (confirmed by our companion paper on stacked spectra) with considerable scatter around the median $R$ values.
description: Comments: 38 pages, 17 figures, 8 tables. Accepted for publication in ApJ
Brief von Schlesinger'sche Buch- und Musikhandlung (Berlin) an Verein für Cultur und Wissenschaft der Juden, 21.11.1825
Creators: name: (:Unkn) Unknown
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 1825
Subjects: subject: 090

description: Abrechnung Kommissionshandel Zeitschrift für die Wissenschaft des Judentums
Learning overhypotheses with hierarchical Bayesian models.
Creators: name: Kemp, Charles
name: Perfors, Amy
name: Tenenbaum, Joshua B.
Publisher: name: Carnegie Mellon University
Year: 2007
Subjects: subject: 170199 Psychology not elsewhere classified
subject: FOS: Psychology

description: Inductive learning is impossible without overhypotheses, or constraints on the hypotheses considered by the learner. Some of these overhypotheses must be innate, but we suggest that hierarchical Bayesian models can help to explain how the rest are acquired. To illustrate this claim, we develop models that acquire two kinds of overhypotheses--overhypotheses about feature variability (e.g. the shape bias in word learning) and overhypotheses about the grouping of categories into ontological kinds like objects and substances.
Atom Interferometers and the Gravitational Redshift
Creators: name: Sinha, Supurna
name: Samuel, Joseph
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: From the principle of equivalence, Einstein predicted that clocks slow down in a gravitational field. Since the general theory of relativity is based on the principle of equivalence, it is essential to test this prediction accurately. Muller, Peters and Chu claim that a reinterpretation of decade old experiments with atom interferometers leads to a sensitive test of this gravitational redshift effect at the Compton frequency. Wolf et al dispute this claim and adduce arguments against it. In this article, we distill these arguments to a single fundamental objection: an atom is NOT a clock ticking at the Compton frequency. We conclude that atom interferometry experiments conducted to date do not yield such sensitive tests of the gravitational redshift. Finally, we suggest a new interferometric experiment to measure the gravitational redshift, which realises a quantum version of the classical clock "paradox".
description: 18 pages, one figure, improved discussion, corrected typos
ASSESSING HIGH SCHOOL STUDENTS' COMPETENCE IN STEAM EDUCATION: PERSPECTIVES FROM INTERDISCIPLINARY TOPICS IN HUMANITIES AND SOCIAL SCIENCE
Creators: name: Van Long, Nghiem
name: Phuong, Duong Quynh
Publisher: name: The Scientific Heritage
Year: 2021
Subjects: Assessment
STEAM education
competence
humanities and social science
high school

description: Diversity and creation in method and form of teaching as well as the process of testing and assessment is one of the important educational orientations. In that spirit, the assessment in STEM/STEAM education also needs to be respected, perform follow the principle and processes, using appropriate assessment tools. Our research aims to approach and analyze the assessment of students' competence in STEAM education, which delves into the research of assessment in the STEAM topic in the fields of the humanities and social sciences. The main research methods used are: research, synthesis, document analysis menthod; field survey in high school; expert method and interdisciplinary approach method
Superfluid and Mott Insulating shells of bosons in harmonically confined optical lattices
Creators: name: Mitra, Kaushik
name: Williams, C. J.
name: de Melo, C. A. R. Sa
Publisher: name: arXiv
Year: 2007
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Weakly interacting atomic or molecular bosons in quantum degenerate regime and trapped in harmonically confined optical lattices, exhibit a wedding cake structure consisting of insulating (Mott) shells. It is shown that superfluid regions emerge between Mott shells as a result of fluctuations due to finite hopping. It is found that the order parameter equation in the superfluid regions is not of the Gross-Pitaeviskii type except near the insulator to superfluid boundaries. The excitation spectra in the Mott and superfluid regions are obtained, and it is shown that the superfluid shells posses low energy sound modes with spatially dependent sound velocity described by a local index of refraction directly related to the local superfluid density. Lastly, the Berezinskii-Kosterlitz-Thouless transition and vortex-antivortex pairs are discussed in thin (wide) superfluid shells (rings) limited by three (two) dimensional Mott regions.
description: 11 pages, 9 figures,
Closing Gaps: A Model of Cumulative Curation and Preservation Levels for Trustworthy Digital Repositories
Creators: name: Recker, Jonas
name: Kleemola, Mari
name: L'Hours, Hervé
Publisher: name: Zenodo
Year: 2024
Subjects: digital preservation
digital curation
trustworthy digital repositories
certification
CoreTrustSeal

description: Curation and preservation measures carried out by digital repository staff are an important building block in maintaining the accessibility and usability of digital resources over time. The measures adequate to achieve long-term usability for a given audience strongly depend on scenarios of (re)use, the (intended) users’ needs and skills, the organisational setting (e.g., mission, resources, policies), as well as the characteristics of the digital objects to be preserved. The assessment of curation and preservation measures also forms an important part of existing certification procedures for trustworthy digital repositories (TDRs) as offered, for example, by the CoreTrustSeal foundation, the nestor network, or ISO.

The digital curation community is presented with the challenge of finding community-, organization-, and object-specific approaches to curation and preservation at the same time as defining the minimum level of curation and preservation measures expected from a TDR in sufficiently generic terms to ensure applicability to a wide array of repositories. Against this backdrop this presentation discusses the need for and benefits of community-agreed levels of curation and preservation to address this challenge, and considers the tiered model proposed by the CoreTrustSeal Board as an example. 

The proposed model is then applied in an analysis of successful CoreTrustSeal applications from 2018-2022 in an effort to better understand the capacity of the curation and preservation levels to capture the respective practices of repositories and to identify potential gaps.
Cissidium obsoletum Darby 2020, sp. nov.
Creators: name: Darby, Michael
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Ptiliidae
Cissidium
Cissidium obsoletum

description: Cissidium obsoletum sp. nov.
urn:lsid:zoobank.org:act: 3D695B00-2863-4F4B-BDCA-C24906A26BBB
Fig. 98
Etymology
Johnson ms name, from the Latin adjective ‘ obsoletus ’, meaning ‘worn out’ or ‘shabby’ and probably referring to the poor condition of the insect.
Material examined
Holotype ZIMBABWE • ♀; “N. RHODESIA”, Mwinilunga District, Helenga, nr. Kalene, Zambesi Rapids; 3 May 1963; MV light trap; E. Pinhey leg.; BM 1963-742; BMNH. The specimen was found damaged, with one antenna and one elytron missing, and mesoventrite broken.
Description
SIZE. Habitus (Fig. 98A), length 0.65 mm.
COLOUR. Yellow brown, shining, antennae, legs and pubescence yellow.
HEAD. Without an impressed line behind the eyes, width across eyes 0.21 mm; antennomeres III–XI length 0.31 mm, III–IX length 0.16 mm, X–XI length 0.17 mm, antennomere XI without a median constriction; mentum obscured.
PRONOTUM. Length 0.20 mm, width 0.29 mm, sparsely pubescent; sides evenly rounded anteriorly, slightly sinuate posteriorly before the rectangular hind angles, sides bordered, the borders continuing along the posterior margin where they are enlarged with convex anterior margins before terminating at the median emargination opposite the scutellum (Fig. 98B).
ELYTRA. Length 0.45 mm, width 0.34 mm, sparsely pubescent, barely foveolate.
MESOVENTRITE. Anteriorly too damaged to make out clearly; keel wide, parallel-sided, termination unclear; mesoventral lateral margins strongly angled, without serrations; humeri with small tooth (Fig. 98C).
METAVENTRITE. Length 0.18 mm, scattered sparse pubescence, disc simple, width between spines 0.10 mm; margins of mesocoxal borders not serrate.
WINGS. Macropterous.
GENITALIA. Female spermatheca globular. Males not known.
Remarks
The only species of Cissidium to have been described from Zimbabwe (given as Northern Rhodesia).
description: Published as part of Darby, Michael, 2020, A revision of Cissidium Motschulsky (Coleoptera: Ptiliidae) with seventy seven new species, pp. 1-188 in European Journal of Taxonomy 622 on pages 155-156, DOI: 10.5852/ejt.2020.622, http://zenodo.org/record/3777282
Vortrag im Verein für Cultur und Wissenschaft der Juden
Creators: name: (:Unkn) Unknown
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 1821
Subjects: subject: 090

description: Gründung eines Spezialvereins; Verhältnis des Vereins zu Spezialvereinen
Dataset for SPASTC: A Spatial Partitioning Algorithm for Scalable Travel-time Computation
Creators: name: Michels, Alexander
name: Park, Jinwoo
name: Kang, Jeon-Young
name: Wang, Shaowen
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 440611
subject: Transport geography
classificationCode: 461305
subject: Data structures and algorithms
classificationCode: 460607
subject: High performance computing

description: This dataset is associated with the paper "SPASTC: A Spatial Partitioning Algorithm for Scalable Travel-time Computation"SPASTC is designed as a novel algorithm for partitioning points in space *together* with the spatial context of the points. It was specifically designed for enabling scalable and memory constrained travel-time catchment calculations for spatial accessibility analysis. This repository contains:* `data` - the necessary data for SPASTC and accessibility calculation. Due to file limits, we do not provide the OSM network data necessary for calculating travel-time. However, we do give pre-compute travel-time catchments for our hospital data set and...* `scripts` - we provide the necessary scripts for pulling OSM networks with OSMnx for the entire Contiguous United States and calculating the memory usage of each county's road network!* `notebooks` - notebooks for SPASTC and accessibility at various spatial extents.For more information about the data and scripts, see the READMEs in the respective directories.## Notebooks* Using SPASTC:* Illinois: [notebooks/SPASTC-Illinois.ipynb](notebooks/SPASTC-Illinois.ipynb)* Midwest US: [notebooks/SPASTC-Midwest.ipynb](notebooks/SPASTC-Midwest.ipynb)* Contiguous US: [notebooks/SPASTC-Contiguous.ipynb](notebooks/SPASTC-Contiguous.ipynb)* Merging results from parallel jobs run with SPASTC to a single shapefile: [notebooks/MergingCatchments.ipynb](notebooks/MergingCatchments.ipynb)* Calculating Enhanced Two-Step Floating Catchment Area (E2SFCA):* Illinois, Midwest, and Contiguous US: [notebooks/CalculateAccessibility.ipynb](notebooks/CalculateAccessibility.ipynb)* Analyzing the runtime of the SPASTC algorithm: [notebooks/MergingCatchments.ipynb](notebooks/MergingCatchments.ipynb)
Continuous-time random walk with a superheavy-tailed distribution of waiting times
Creators: name: Denisov, S. I.
name: Kantz, H.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the long-time behavior of the probability density associated with the decoupled continuous-time random walk which is characterized by a superheavy-tailed distribution of waiting times. It is shown that if the random walk is unbiased (biased) and the jump distribution has a finite second moment then the properly scaled probability density converges in the long-time limit to a symmetric two-sided (an asymmetric one-sided) exponential density. The convergence occurs in such a way that all the moments of the probability density grow slower than any power of time. As a consequence, the reference random walk can be viewed as a generic model of superslow diffusion. A few examples of superheavy-tailed distributions of waiting times that give rise to qualitatively different laws of superslow diffusion are considered.
description: 7 pages
The SAMI Galaxy Survey: Spatially Resolving the Main Sequence of Star Formation
Creators: name: Medling, Anne M.
name: Cortese, Luca
name: Croom, Scott M.
name: Green, Andrew W.
name: Groves, Brent
name: Hampton, Elise
name: Ho, I-Ting
name: Davies, Luke J. M.
name: Kewley, Lisa J.
name: Moffett, Amanda J.
name: Schaefer, Adam L.
name: Taylor, Edward
name: Zafar, Tayyaba
name: Bekki, Kenji
name: Bland-Hawthorn, Joss
name: Bloom, Jessica V.
name: Brough, Sarah
name: Bryant, Julia J.
name: Catinella, Barbara
name: Cecil, Gerald
name: Colless, Matthew
name: Couch, Warrick J.
name: Drinkwater, Michael J.
name: Driver, Simon P.
name: Federrath, Christoph
name: Foster, Caroline
name: Goldstein, Gregory
name: Goodwin, Michael
name: Hopkins, Andrew
name: Lawrence, J. S.
name: Leslie, Sarah K.
name: Lewis, Geraint F.
name: Lorente, Nuria P. F.
name: Owers, Matt S.
name: McDermid, Richard
name: Richards, Samuel N.
name: Sharp, Robert
name: Scott, Nicholas
name: Sweet, Sarah M.
name: Taranu, Dan S.
name: Tescari, Edoardo
name: Tonini, Chiara
name: van de Sande, Jesse
name: Walcher, C. Jakob
name: Wright, Angus
Publisher: name: arXiv
Year: 2018
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the ~800 star formation rate maps for the SAMI Galaxy Survey based on Hα emission maps, corrected for dust attenuation via the Balmer decrement, that are included in the SAMI Public Data Release 1. We mask out spaxels contaminated by non-stellar emission using the [O III]/Hβ, [N II]/Hα, [S II]/Hα, and [O I]/Hα line ratios. Using these maps, we examine the global and resolved star-forming main sequences of SAMI galaxies as a function of morphology, environmental density, and stellar mass. Galaxies further below the star-forming main sequence are more likely to have flatter star formation profiles. Early-type galaxies split into two populations with similar stellar masses and central stellar mass surface densities. The main sequence population has centrally-concentrated star formation similar to late-type galaxies, while galaxies >3σ below the main sequence show significantly reduced star formation most strikingly in the nuclear regions. The split populations support a two-step quenching mechanism, wherein halo mass first cuts off the gas supply and remaining gas continues to form stars until the local stellar mass surface density can stabilize the reduced remaining fuel against further star formation. Across all morphologies, galaxies in denser environments show a decreased specific star formation rate from the outside in, supporting an environmental cause for quenching, such as ram-pressure stripping or galaxy interactions.
description: accepted to MNRAS
Swinging on a star: musical imaginaries and US childhood
Creators: name: Bunch, Ryan
Publisher: name: No Publisher Supplied
Year: 2023

description: This dissertation arose in response to my questions about how music and childhood might be co-constructed in the United States. My method was to collect and analyze material culture and media texts to identify a canon of children’s songs and performance practices centering on the mid-twentieth century. Through analysis of these materials, I find that the canons and material apparatus of mass-market US children’s music imagine and culturally produce the idea of a naturally musical child. This musical child is raced, classed, gendered, and implicated in citizenship and national politics. The process of canonization involves inclusions and exclusions of songs, practices, and differently positioned children in discernable repertoires. Each chapter explores a repertoire, a set of practices, or a historical moment, highlighting different, but intimately related, aspects of the children’s music canon. Songbooks, toys, instruments, media, and nursery songs like “Mary Had a Little Lamb” and “Twinkle, Twinkle, Little Star” cultivate the perceived naturalness of this child and its musicality, imagining children and music as interior, transcendent, angelic, spiritual, and close to God, animals, and innocence. Children’s songs with legacies in blackface, from “Oh! na” to “Zip-a-Dee-Doo-Dah” construct the musical child as racialized, primitive, and “natural” in ways that are different for children of different race and class origins. Folk music for children draws on ideas of folk authenticity to present the politics, histories, and futures of childhood and nationhood as innocent in such songs as “The Big Rock Candy Mountain,” music by folk singers like Burl Ives and Ella Jenkins, and the media franchises Schoolhouse Rock and Free to Be . . . You and Me. Musical theater songs engage with the perception and practice of children’s bursting into song as an enactment of fairy tale desire and American citizenship, with Peter Pan and Annie as case studies. “The Ballad of Davy Crockett,” “Puff the Magic Dragon,” and “It’s a Small World” are iconic children’s songs of the Post-World-War-II era that imagine the frontiers of childhood and nationhood through the figure of the musical child as the promise of the future on scales from the nursery to the home, the neighborhood, and the world.
An approximation theorem of Runge type for kernels of certain non-elliptic partial differential operators
Creators: name: Kalmes, Thomas
Publisher: name: arXiv
Year: 2018
Subjects: subject: Analysis of PDEs (math.AP)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 35A35, 35E20, 35E99

description: For a constant coefficient partial differential operator $P(D)$ with a single characteristic direction such as the time-dependent free Schrödinger operator as well as non-degenerate parabolic differential operators like the heat operator we characterize when open subsets $X_1\subseteq X_2$ of $\mathbb{R}^d$ form a $P$-Runge pair. The presented condition does not require any kind of regularity of the boundaries of $X_1$ nor $X_2$. As part of our result we prove that for a large class of non-elliptic operators $P(D)$ there are smooth solutions $u$ to the equation $P(D)u=0$ on $\mathbb{R}^d$ with support contained in an arbitarily narrow slab bounded by two parallel characteristic hyperplanes for $P(D)$.
description: accepted for publication in Bulletin des Sciences Math\'ematiques
Four-vertex Model and Random Tilings
Creators: name: Bogoliubov, N. M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The exactly solvable four-vertex model on a square grid with the different boundary conditions is considered. The application of the Algebraic Bethe Ansatz method allows to calculate the partition function of the model. For the fixed boundary conditions the connection of the scalar product of the state vectors with the generating function of the column and row strict boxed plane partitions is established. Tiling model on a periodic grid is discussed.
The Gardner method for symmetries
Creators: name: Rasin, Alexander G.
name: Schiff, Jeremy
Publisher: name: arXiv
Year: 2011
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: The Gardner method, traditionally used to generate conservation laws of integrable equations, is generalized to generate symmetries. The method is demonstrated for the KdV, Camassa-Holm and Sine-Gordon equations. The method involves identifying a symmetry which depends upon a parameter; expansion of this symmetry in a (formal) power series in the parameter then gives the usual infinite hierarchy of symmetries. We show that the obtained symmetries commute, discuss the relation of the Gardner method with Lenard recursion (both for generating symmetries and conservation laws), and also the connection between the symmetries of continuous integrable equations and their discrete analogs.
On the radio and GeV-TeV gamma-ray emission connection in Fermi blazars
Creators: name: Lico, R.
name: Giroletti, M.
name: Orienti, M.
name: Costamante, L.
name: Pavlidou, V.
name: D'Ammando, F.
name: Tavecchio, F.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The Fermi-LAT revealed that the census of the gamma-ray sky is dominated by blazars. Looking for a possible connection between radio and gamma-ray emission is a central issue for understanding the blazar physics, and various works were dedicated to this topic. However, while a strong and significant correlation was found between radio and gamma-ray emission in the 0.1-100 GeV energy range, the connection between radio and very high energy (VHE, E>0.1 TeV) emission is still elusive. The main reason is the lack of a homogeneous VHE sky coverage, due to the operational mode of the imaging atmospheric Cherenkov telescopes. With the present work we aim to quantify and assess the significance of the possible connection between high-resolution radio emission, on milliarcsecond scale, and GeV-TeV gamma-ray emission in blazars. For achieving our goal we extract two large and unbiased blazar samples from the 1FHL and 2FHL Fermi catalogs, above 10 GeV and 50 GeV, respectively. To investigate how the correlation evolves as the gamma-ray energy increases, we perform the same analysis by using the 0.1-300 GeV 3FGL gamma-ray energy fluxes. When we consider the 0.1-300 GeV gamma-ray energy range, we find a strong and significant correlation for all of the blazar sub-classes. Conversely, when we consider the gamma-ray emission above 10 GeV the correlation with the radio emission vanishes, with the exception of the blazar sub-class of high synchrotron peaked objects.
description: 6 pages, 2 figures, 1 table. For the proceedings of the 7th International Fermi Symposium
Supplemental Material to "SpecTacles: Supporting Control Flow Comprehension of Software Developers in TLA+"
Creators: name: Stachnik, Daniel
name: Beckmann, Tom
name: Rein, Patrick
name: Hirschfeld, Robert
Publisher: name: Zenodo
Year: 2024

description: tutorial-tool.m4v: Introductory video that we showed participants of the exploratory user study

tla-introduction.pdf: Introductory text and cheat sheet we showed participants of the exploratory user study

exploraty-user-study-questionnaire.pdf: Questionnaire we asked participants to fill out as part of our exploratory user study

example-formative-study-participant-notes.pdf: An example scribble that a participant of our formative study created as notes while solving the task

TwoPhase.tla: specification used in the exploratory user study, adapted from https://doi.org/10.1145/1132863.1132867
DRAWBACKS OF THE ESTABLISHED METHODS OF TEACHING INFORMATICS IN MODERN SCHOOLS
Creators: name: Kabdualiyev, D.
name: Yerengaiypov, S.
name: Serikov, B.
name: Akhmetov Zh.
Publisher: name: The Scientific Heritage
Year: 2021
Subjects: Informatics
teaching
school
traditional
education
e-learning
ICT
mobile.

description: Of all the disciplines from the school-level computer science curriculum, informatics has been the less adaptive to changes. Before introducing a proposal on how schools should alter their informatics teaching strategies it is necessary to expose the disadvantages of the traditional approach applied by most schools to their informatics classes. These disadvantages are not related to the nature of informatics problems being solved, but have to do with tools and infrastructure offered for their solving. Informatics teachers have accustomed to following the traditional approach to teaching. They have offered traditional integrated development environments running on traditional desktop computers. The changes have affected only the programming languages or informatics paradigms while the computer infrastructure remained the same. This approach works well in the higher educational institutions where the disciplines from their curriculum require the usage of high-end desktop computers and workstations. In the school classroom context, however, it causes inefficiencies in the organization of educational process and has a negative impact on the academic performance.
Learning mathematics from examples and by doing
Creators: name: Xinming  Zhu
name: Simon, Herbert Alexander
name: Artificial Intelligence And Psychology Project.
Publisher: name: Carnegie Mellon University
Year: 1987
Subjects: subject: 170199 Psychology not elsewhere classified
subject: FOS: Psychology

description: Abstract: "Human learning takes place in a wide variety of situations and almost surely employs many different processes. During the past few years, considerable attention has been paid to the ways in which people can learn from procedures by examining worked-out examples and by solving problems--learning from examples and learning by doing. In this paper we wish to discuss the process of learning from examples, and to discuss a number of experiments with high-school students employing this learning paradigm. The experiments, in addition to comparing this learning strategy with more traditional ones, provided us with information about the processing actually used by students who employed the new strategies. By 'traditional strategies' we mean procedures in which the teacher and textbook play an active role in presenting and explaining the material to be learned."
Irradiated three-dimensional Luttinger semimetal: A factory for engineering Weyl semimetals
Creators: name: Ghorashi, Sayed Ali Akbar
name: Hosur, Pavan
name: Ting, Chin-Sen
Publisher: name: arXiv
Year: 2018
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the interaction between elliptically polarized light and a three-dimensional Luttinger semimetal with quadratic band touching using Floquet theory. In the absence of light, the touching bands can have the same or the opposite signs of the curvature; in each case, we show that simply tuning the light parameters allows us to create a zoo of Weyl semimetallic phases. In particular, we find that double and single Weyl points can coexist at different energies, and they can be tuned to be type I or type II. We also find an unusual phase transition, in which a pair of Weyl nodes form at finite momentum and disappear off to infinity. Considering the broad tunability of light and abundance of materials described by the Luttinger Hamiltonian, such as certain pyrochlore iridates, half-Heuslers and zinc-blende semiconductors, we believe this work can lay the foundation for creating Weyl semimetals in the lab and dynamically tuning between them.
Metastable Supersymmetry Breaking in a Cooling Universe
Creators: name: Kaplunovsky, Vadim S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: I put metastable supersymmetry breaking in a cosmological context. I argue that under reasonable assumptions, the cooling down early Universe favors metastable SUSY-breaking vacua over the stable supersymmetric vacua. To illustrate the general argument, I analyze the early-Universe history of the Intriligator-Seiberg-Shih model.
description: Plenary talk at PASCOS 07 converence, based on hep-th/0611018. 8 dense pages, LaTeX+AIP6x9+PStricks
Model-independent measurement of the W boson helicity in top quark decays
Creators: name: D0 Collaboration
name: Abazov, V. M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present the first model-independent measurement of the helicity of $W$ bosons produced in top quark decays, based on a 1 fb$^{-1}$ sample of candidate $t\bar{t}$ events in the dilepton and lepton plus jets channels collected by the D0 detector at the Fermilab Tevatron $p\bar{p}$ Collider. We reconstruct the angle $θ^*$ between the momenta of the down-type fermion and the top quark in the $W$ boson rest frame for each top quark decay. A fit of the resulting \costheta distribution finds that the fraction of longitudinal $W$ bosons $f_0 = 0.425 \pm 0.166 \hbox{(stat.)} \pm 0.102 \hbox{(syst.)}$ and the fraction of right-handed $W$ bosons $f_+ = 0.119 \pm 0.090 \hbox{(stat.)} \pm 0.053 \hbox{(syst.)}$, which is consistent at the 30% C.L. with the standard model.
description: submitted to Phys. Rev. Lett
DEVELOPMENT OF THE QUALITY OF HUMAN RESOURCES AND ITS INFLUENCE OF THE HUMAN RESOURCES OF THE ENTERPRISE
Creators: name: Adilov, B.
name: Muratov, J.
Publisher: name: The Scientific Heritage
Year: 2021
Subjects: human resources
industry
personnel
labor productivity
professional personnel
quality.

description: The article deals with theoretical and practical issues of human resource development in industry. The role of labor productivity in reducing costs in industries and the role of professional personnel are presented. The analysis of the factors in ensuring the development of personnel, as well as the main aspects of cost reduction and the development of personnel potential.
2d orbifolds with exotic supersymmetry
Creators: name: Florakis, Ioannis
name: García-Etxebarria, Iñaki
name: Lust, Dieter
name: Regalado, Diego
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We analyse various two dimensional theories arising from compactification of type II and heterotic string theory on asymmetric orbifolds. We find extra supersymmetry generators arising from twisted sectors, giving rise to exotic supersymmetry algebras. Among others we discover new cases with a large number of supercharges, such as $\mathcal{N}=(20,8)$, $\mathcal{N}=(24,8)$, $\mathcal{N}=(32,0)$, $\mathcal{N}=(24,24)$ and $\mathcal{N}=(48,0)$.
description: 48 pages
Codes and Designs Related to Lifted MRD Codes
Creators: name: Etzion, Tuvi
name: Silberstein, Natalia
Publisher: name: arXiv
Year: 2011
Subjects: subject: Information Theory (cs.IT)
subject: Discrete Mathematics (cs.DM)
subject: FOS: Computer and information sciences

description: Lifted maximum rank distance (MRD) codes, which are constant dimension codes, are considered. It is shown that a lifted MRD code can be represented in such a way that it forms a block design known as a transversal design. A slightly different representation of this design makes it similar to a $q-$analog of a transversal design. The structure of these designs is used to obtain upper bounds on the sizes of constant dimension codes which contain a lifted MRD code. Codes which attain these bounds are constructed. These codes are the largest known codes for the given parameters. These transversal designs can be also used to derive a new family of linear codes in the Hamming space. Bounds on the minimum distance and the dimension of such codes are given.
description: Submitted to IEEE Transactions on Information Theory. The material in this paper was presented in part in the 2011 IEEE International Symposium on Information Theory, Saint Petersburg, Russia, August 2011