cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Προγραμματικές δηλώσεις των κυβερνήσεων από το 2009 μέχρι το 2015. Η εκπαιδευτική πολιτική μέσα από τις προγραμματικές δηλώσεις στη βουλή την περίοδο της κρίσης
Creators: name: Κεσίδης, Αναστάσιος Ηλία
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Εκπαιδευτική διάρθρωση
Ιδιωτική εκπαίδευση
Ειδική αγωγή
Προσχολική αγωγή
Ολοήμερο σχολείο
Χρηματοδότηση της εκπαίδευσης
Υλικοτεχνική υποδομή
Πρόσβαση στην τριτοβάθμια εκπαίδευση
Εκπαιδευτική τεχνολογία
Εκπαιδευτικό προσωπικό
Πρωτοβάθμια
Δευτεροβάθμια
Τριτοβάθμια
Διευθυντές
Αξιολόγηση
Educational structure
Private education
Special education
Early childhood education
Extended school
Financing education
Logistics infrastructure
Access to higher education
Educational technology
Educational staff
Primary
Secondary
Higher
Directors
Evaluation

description: Σκοπός της παρούσας εργασίας είναι η έρευνα και η ανάλυση των προγραμματικών δηλώσεων των κυβερνήσεων της περιόδου 2009 – 2015 σε ότι αφορά την Δομή, την Οργάνωση και την Διοίκηση και την Εποπτεία της Εκπαίδευσης. Παρουσιάζεται αρχικά το πολιτικό συγκείμενο της περιόδου. Παρέχονται επίσης στο θεωρητικό πλαίσιο εννοιολογικές αποσαφηνίσεις όρων που σχετίζονται με τα προς ανάλυση κείμενα. Η μεθοδολογία έρευνας αποτελεί μια σύνθεση ποιοτικής και ποσοτικής έρευνας. Οι παραπάνω τρεις κατηγορίες θα αναλυθούν σε δεκατρείς υποκατηγορίες: Ιδιωτική Εκπαίδευση, Ειδική Αγωγή, Προσχολική Αγωγή, Ολοήμερο Σχολείο, Χρηματοδότηση – Υλικοτεχνική Υποδομή, Ζητήματα ποιότητας, Σύστημα Πρόσβασης στην Τριτοβάθμια Εκπαίδευση, Τεχνολογία, Εκπαιδευτικό προσωπικό, Βαθμίδες Εκπαίδευσης, Διευθυντές και Αξιολόγηση. Αφού έγινε καταχώρηση των αποτελεσμάτων σε αυτές τις υποκατηγορίες, έγινε ποιοτική και ποσοτική τους ανάλυση και καταγραφή των συμπερασμάτων. Το τελικό συμπέρασμα που μπορεί να εξαχθεί είναι, η ύπαρξη ενός δίπολου με την Εκπαίδευση ως μέσο βελτίωσης της ανταγωνιστικότητας και της ανάπτυξης από την μια, και η Εκπαίδευση ως το μέσω άμβλυνσης των κοινωνικών ανισοτήτων από την άλλη.
description: The purpose of this paper is to investigate and analyze programmatic statements of the governments of the period 2009 - 2015 in terms of Structure, Organization and Management and Supervision of Education. Initially the political context of the period is presented.Conceptual clarifications of terms are also provided in the theoretical context related to the texts to be analyzed. Research methodology is a synthesis of qualitative and quantitative research.The above three categories will be broken down into thirteen subcategories: Private Education, Special Education, Preschool Education, All-day School, Financing - Logistics, Quality Issues, Third-Level Education System, Technology, Educational Staff, Training Degrees, Managers and Evaluation. After the results were recorded in these subcategories, their qualitative and quantitative analysis and recording of the conclusions were made. The final conclusion that can be drawn is the existence of a dipole with Education as a means of improving competitiveness and development on the one hand, and Education through the mitigation of social inequalities on the other.
Intrinsic dimension of path integrals: data mining quantum criticality and emergent simplicity
Creators: name: Mendes-Santos, Tiago
name: Angelone, Adriano
name: Rodriguez, Alex
name: Fazio, Rosario
name: Dalmonte, Marcello
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Computational Physics (physics.comp-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: Quantum many-body systems are characterized by patterns of correlations that define highly-non trivial manifolds when interpreted as data structures. Physical properties of phases and phase transitions are typically retrieved via simple correlation functions, that are related to observable response functions. Recent experiments have demonstrated capabilities to fully characterize quantum many-body systems via wave-function snapshots, opening new possibilities to analyze quantum phenomena. Here, we introduce a method to data mine the correlation structure of quantum partition functions via their path integral (or equivalently, stochastic series expansion) manifold. We characterize path-integral manifolds generated via state-of-the-art Quantum Monte Carlo methods utilizing the intrinsic dimension (ID) and the variance of distances from nearest neighbors (NN): the former is related to dataset complexity, while the latter is able to diagnose connectivity features of points in configuration space. We show how these properties feature universal patterns in the vicinity of quantum criticality, that reveal how data structures {\it simplify} systematically at quantum phase transitions. This is further reflected by the fact that both ID and variance of NN-distances exhibit universal scaling behavior in the vicinity of second-order and Berezinskii-Kosterlitz-Thouless critical points. Finally, we show how non-Abelian symmetries dramatically influence quantum data sets, due to the nature of (non-commuting) conserved charges in the quantum case. Complementary to neural network representations, our approach represents a first, elementary step towards a systematic characterization of path integral manifolds before any dimensional reduction is taken, that is informative about universal behavior and complexity, and can find immediate application to both experiments and Monte Carlo simulations.
description: 19 pages, 13 figures, version accepted for publication in Phys. Rev. X Quantum
Forbidden island heights in stress-driven coherent Stranski-Krastanov growth
Creators: name: Prieto, J. E.
name: Markov, I.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The observed height distribution of clusters obtained in strained epitaxy has been often interpreted in terms of electronic effects. We show that some aspects can be explained classically by the interplay of strain and edge energies. We find that soft materials can transform directly from monolayer into thicker islands by two-dimensional (2D) multilayer nucleation and growth. There is a critical thickness decreasing with the force constant. Thinner islands are thermodynamically forbidden, due to the insufficient stress relaxation upon clustering particularly under tensile stress. At sufficiently large misfits the barrier for 2D multilayer nucleation is significantly smaller than the barrier for subsequent single-layer nucleation. The effects are found to be quantitatively reasonable and offer a plausible explanation for the absence of thin islands and 2D growth of flattop islands usually attributed to quantum size effects.
description: 4 pages, 4 figures. Accepted version. Includes quantitative estimations comparing with experiments plus minor changes
Supplementary materials 1–6. The Evolution of the Popocatépetl Volcanic Complex: Constraints on Periodic Edifice Construction and Destruction by Sector Collapse
Creators: name: Gisbert, Guillem
name: Delgado-Granados, Hugo
name: Mangler, Martin
name: Prytulak, Julie
name: Espinasa-Pereña, Ramón
name: Petrone, Chiara Maria
Publisher: name: Geological Society of London
Year: 2021
Subjects: subject: Geology
subject: FOS: Earth and related environmental sciences

description: SM1) a brief description of the previous works on the evolution of the Popocatépetl Volcanic Complex (PVC); SM2) the method used for the estimation of the volume of the sector collapse events occurred at the PVC; SM3) the re-evaluation of data on avalanche deposits associated to sector collapse events available in literature; SM4) a brief description of pyroclastic stratigraphic markers used for volcanostratigraphic correlation at the PVC; SM5) a detailed description of the field observations supporting the relative ages of the Popocatépetl stage lava flows; SM6) a brief description of the geology around the PVC.
Transcription of a fry-bread recipe
Creators: name: Parker, Verdena
name: Campbell, Amy
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: hup

description: Audio file VP-190408-06: Transcription of the second version of the fry-bread recipe, file VP-101107-03, from 8:13 to 9:16.
Exit Polling in an Emergent Democracy: The Complex Case of Ukraine
Creators: name: Kharchenko, Natalya Nikolaevna
name: Paniotto, Volodymyr Illich
Publisher: name: European Survey Research Association
Year: 2010
Subjects: exit-poll; elections

description: This report considers the methodological specifics of conducting exit polls to verify election returns, mainly using an example of election campaigns in Ukraine from 2002-2007. The deepest public resonance was aroused by exit polls conducted after the second round of Ukrainian presidential elections in 2004. These polls were one of the factors, which led to massive demonstrations (the so-called "Orange Revolution") and the revocation of election results. The authors show that in the environment of administrative pressure on voters, governmental control of mass media, and severe political struggle, inaccuracy increases. Thus, to acquire reliable and valid information, the polling methods used must be modified. The recommendations given for the methodology of conducting exit polls may be useful for emergent democratic countries.
description: Survey Research Methods, Vol 4, No 1 (2010)
Impact of an artifical circulation device on the heat budget of an ice-covered mid-latitude lake
Creators: name: Rogers, Christopher K.
Publisher: name: University of British Columbia
Year: 2008

description: Two lakes located in the Southern Interior Plateau of British Columbia were selected for a field investigation in order to assess the impact of artificial circulation on the heat budget of a small mid-latitude ice-covered lake. The heat transfer algorithm developed by Patterson & Hamblin (1988) for high latitude lakes was extended to include the impacts of snowmelt due to rain, sediment heat transfer, snow-ice formation, and day today variations in snow density, snow conductivity and albedo. Since the lakes considered are nearly isothermal in winter, the new model ignores the internal hydrodynamics of the problem. This model was tested on Harmon Lake, which was selected as a control for the study. The model was further modified to include the effects of artificial circulation at nearby Menzies Lake. These effects include polynya development, and a substantial reduction in average temperature. Heat losses due to free convective evaporation and direct snowfall on open water were added to the set of standard aerodynamic formulae used to determine the net meteorological heat flux across a water surface. Turbulent heat transfer from the circulated water to the ice cover was estimated based on an empirical surface velocity relationship derived from field measurements. The size of the polynya is estimated by means of a simple heat balance which also involves the surface velocity function. The Harmon Lake predictions agree well with the field data. All discrepancies could be accounted for by parameter uncertainties and expected observation error. It was found that sediment heat transfer may be important in early winter in preventing a net loss of heat from the lake water. Significant heat gains in the latter part of winter, however, are attributed to the penetration of solar radiation. Once calibrated, the Menzies Lake predictions are also good. It was found that, over the period in which lake temperature dropped, the average heat loss due to turbulent heat transfer between water and ice was three times that across the polynya surface. The former heat flux continued to increase as the lake warmed up again, while the latter fell, on average, over a short period until increased solar heating resulted in a reversal in the direction of heat transfer across the polynya. Discrepancies between early winter ice thickness predictions and observations, could not be accounted for. It is suspected, however, that these discrepancies are a result of the impact which the heat flux across the polynya may have on the heat flux through the ice and snow cover. In this thesis, it is assumed that these two fluxes are independent of one another.
ECM modeling and performance tuning of SpMV and Lattice QCD on A64FX
Creators: name: Alappat, Christie
name: Meyer, Nils
name: Laukemann, Jan
name: Gruber, Thomas
name: Hager, Georg
name: Wellein, Gerhard
name: Wettig, Tilo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Performance (cs.PF)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: The A64FX CPU is arguably the most powerful Arm-based processor design to date. Although it is a traditional cache-based multicore processor, its peak performance and memory bandwidth rival accelerator devices. A good understanding of its performance features is of paramount importance for developers who wish to leverage its full potential. We present an architectural analysis of the A64FX used in the Fujitsu FX1000 supercomputer at a level of detail that allows for the construction of Execution-Cache-Memory (ECM) performance models for steady-state loops. In the process we identify architectural peculiarities that point to viable generic optimization strategies. After validating the model using simple streaming loops we apply the insight gained to sparse matrix-vector multiplication (SpMV) and the domain wall (DW) kernel from quantum chromodynamics (QCD). For SpMV we show why the CRS matrix storage format is not a good practical choice on this architecture and how the SELL-C-sigma format can achieve bandwidth saturation. For the DW kernel we provide a cache-reuse analysis and show how an appropriate choice of data layout for complex arrays can realize memory-bandwidth saturation in this case as well. A comparison with state-of-the-art high-end Intel Cascade Lake AP and Nvidia V100 systems puts the capabilities of the A64FX into perspective. We also explore the potential for power optimizations using the tuning knobs provided by the Fugaku system, achieving energy savings of about 31% for SpMV and 18% for DW.
description: 32 pages, 25 figures, 6 tables
Role of surface roughness in superlubricity
Creators: name: Tartaglino, Ugo
name: Samoilov, Vladimir N.
name: Persson, Bo N. J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We study the sliding of elastic solids in adhesive contact with flat and rough interfaces. We consider the dependence of the sliding friction on the elastic modulus of the solids. For elastically hard solids with planar surfaces with incommensurate surface structures we observe extremely low friction (superlubricity), which very abruptly increases as the elastic modulus decreases. We show that even a relatively small surface roughness may completely kill the superlubricity state.
description: 11 pages, 17 figures, format revtex
IS'HOQXON TO'RA IBRAT SHE'RIYATIDA DAVR IJTIMOIY VOQELIGI TALQINIGA XOS TAMOYILLAR
Creators: name: Mamatjanova, Nasibaxon
name: Jabborov, Nurboy
Publisher: name: Zenodo
Year: 2024

description: Mazkur tezisda Ishoqxon Ibrat she’riyatida davr ijtimoiy voqeligi talqiniga xos tamoyillar, ma’naviy-axloqiy qarashlarning xususiyatlari yoritilgan.
Constructing the AdS/CFT dressing factor
Creators: name: Gromov, Nikolay
name: Vieira, Pedro
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We prove the universality of the Hernandez-Lopez phase by deriving it from first principles. We find a very simple integral representation for the phase and discuss its possible origin from a nested Bethe ansatz structure. Hopefully, the same kind of derivation could be used to constrain higher orders of the full quantum dressing factor.
description: 5 figures
Comparing Questions with Agree/Disagree Response Options to Questions with Item-Specific Response Options
Creators: name: Saris, Willem
name: Revilla, Melanie
name: Krosnick, Jon A.
name: Shaeffer, Eric M.
Publisher: name: European Survey Research Association
Year: 2010
Subjects: Quality of Agree/disagree scales, item specific scales, Split ballot MTMM

description: Although Agree/Disagree (A/D) rating scales are hugely popular in the social sciences, a large body of research conducted during more than five decades has documented the bias that results from acquiescence in responses to these items. This may be a reason to prefer questions with Item Specific (IS) response options, but remarkably little research has explored whether responses to A/D rating scale questions are indeed of lower quality than responses to questions with IS response options. Using a research design that combines the advantages of a random assignment between-subjects experiment and the multitrait-multimethod approach in the context of representative sample surveys, we found that responses to A/D rating scale questions indeed had much lower quality than responses to comparable questions offering IS response options. These results attest to the superiority of questions with IS response options.
description: Survey Research Methods, Vol 4, No 1 (2010)
Large exchange bias and low temperature glassy state in frustrated triangular-lattice antiferromagnet Ba$_3$NiIr$_2$O$_9$
Creators: name: Gondh, Shobha
name: Patidar, Manju Mishra
name: Kumar, Kranti
name: Saravanan, M. P.
name: Ganesan, V.
name: Pramanik, A. K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Here, we report both ac and dc magnetization, thermodynamic and electric properties of hexagonal Ba$_3$NiIr$_2$O$_9$. The Ni$^{2+}$ (spin-1) forms layered triangular-lattice and interacts antiferromagnetically while Ir$^{5+}$ is believed to act as magnetic link between the layers. This complex magnetic interaction results in magnetic frustration leading to a spin-glass transition at $T_f$ $\sim$ 8.5 K. The observed magnetic relaxation and aging effect also confirms the nonequilibrium ground state. The system further shows large exchange bias which is tunable with cooling field. Below the Curie-Weiss temperature $θ_{CW}$ ($\sim$ -29 K), the magnetic specific heat $C_m$ displays a broad hump and at low temperature follows $C_m = γT^α$ dependence where both $γ$ and $α$ show dependence on temperature and magnetic field. A sign change in magnetoresistace is observed which is due to an interplay among magnetic moment, field and spin-orbit coupling.
description: 9 pages, 7 figures, Accepted for publication in Phys. Rev. B
The Galaxy Luminosity Function at z~1 in the HUDF: Probing the Dwarf Population
Creators: name: Ryan, R. E.
name: Hathi, N. P.
name: Cohen, S. H.
name: Malhotra, S.
name: Rhoads, J.
name: Windhorst, R. A.
name: Budavári, T.
name: Pirzkal, N.
name: Xu, C.
name: Panagia, N.
name: Moustakas, L.
name: Alighieri, S. di Serego
name: Yan, H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a catalog of spectro-photometric redshifts for 1308 galaxies from the GRism ACS Program for Extragalactic Science (GRAPES) observations with the Hubble Space Telescope. These low-resolution spectra between 6000 A and 9500 A are supplemented with U, J, H, and Ks from various facilities, resulting in redshifts computed with ~40 spectral bins per galaxy. For 81 galaxies between 0.5
description: Includes emulateapj.cls, 6 pages, 6 figures (1 color), 3 tables. Accepted for publication to ApJ
On the accuracy and precision of correlation functions and field-level inference in cosmology
Creators: name: Leclercq, Florent
name: Heavens, Alan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Applications (stat.AP)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We present a comparative study of the accuracy and precision of correlation function methods and full-field inference in cosmological data analysis. To do so, we examine a Bayesian hierarchical model that predicts log-normal fields and their two-point correlation function. Although a simplified analytic model, the log-normal model produces fields that share many of the essential characteristics of the present-day non-Gaussian cosmological density fields. We use three different statistical techniques: (i) a standard likelihood-based analysis of the two-point correlation function; (ii) a likelihood-free (simulation-based) analysis of the two-point correlation function; (iii) a field-level analysis, made possible by the more sophisticated data assimilation technique. We find that (a) standard assumptions made to write down a likelihood for correlation functions can cause significant biases, a problem that is alleviated with simulation-based inference; and (b) analysing the entire field offers considerable advantages over correlation functions, through higher accuracy, higher precision, or both. The gains depend on the degree of non-Gaussianity, but in all cases, including for weak non-Gaussianity, the advantage of analysing the full field is substantial.
description: 6+8 pages, 4+5 figures. Matches MNRAS Letters published version. Appendices provide supplementary information, including calculations of Fisher matrices. Our code and data are publicly available at https://github.com/florent-leclercq/correlations_vs_field
Αξιοποίηση της Εκπαιδευτικής Ρομποτικής με στόχο την κοινωνικό-συναισθηματική ανάπτυξη των παιδιών στην Πρωτοβάθμια Εκπαίδευση: Mία βιωματική προσέγγιση του Αρχαίου Ελληνικού Πολιτισμού
Creators: name: Θεοδοσίου, Μαρία Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Εκπαιδευτική ρομποτική
Κοινωνικές δεξιότητες
Συναισθηματική ανάπτυξη
Educational robotics
Social skills
Emotional development

description: Με την παρούσα έρευνα πρόκειται να διερευνηθεί η αξιοποίηση της ρομποτικής κατά την εκπαιδευτική διαδικασία, με σκοπό την ενίσχυση της κοινωνικής και συναισθηματικής ανάπτυξης των μαθητών που φοιτούν στο Δημοτικό Σχολείο. Αυτό θα επιτευχθεί, έχοντας ως αφόρμηση ένα εκπαιδευτικό πρόγραμμα με θέμα τη Μυθολογία και πιο συγκεκριμένα το Ομηρικό Έπος της Οδύσσειας, με εκπαιδευτικό εργαλείο το εκπαιδευτικό πακέτο Lego Wedo 2.0. Η εργασία βασίστηκε σε βιβλιογραφικές αναφορές, σε μελέτη άρθρων, σε διαδικτυακή αναζήτηση, και στη δημιουργία εκπαιδευτικών δραστηριοτήτων με στόχο την απόκτηση πληρέστερης εικόνας του υπό εξέταση θέματος.
description: This research will explore the exploitation of robotics in the educational process in order to enhance the social and emotional development of students attending Primary School. This will be achieved by having an educational program on Mythology and more specifically the Homeric Epic of Odyssey, with educational tool the Lego Wedo 2.0 training package. The work was based on bibliographic references, article study, online search, and the creation of educational activities aimed at gaining a more complete picture of the subject under consideration.
Seismic reponse and post-liquefaction analysis of the 1990 Dashihe Tailings Dam
Creators: name: Amante, Carlos V.
Publisher: name: University of British Columbia
Year: 2008

description: This thesis presents a preliminary research study of the seismic safety of the Dashihe Tailings Dam in its 1990 condition using state-of-the-art analytical and empirical procedures. The study involves an analysis of the seismic response and post-liquefaction behavior of the dam using the 1976 Tangshan and Luanxian earthquake records as input. The seismic response of the dam was analyzed using the TARA-3 program (Finn et al., 1986). Zones of liquefaction are predicted to develop under the pond and the beach. Extensive cracking is expected to occur in a significant portion of the beach. A post-liquefaction flow deformation analysis of the dam was also performed using the program TARA-3FL (Finn andYogendrakumar, 1989). The analysis shows that most of the deformations would occur by sliding of materials under the pond and in the area of the beach near the pond margin. Despite these deformations, the dam is expected to remain operational after the earthquake.
Spectropolarimetry of the Classical T Tauri Star TW Hydrae
Creators: name: Yang, H.
name: Johns-Krull, C. M.
name: Valenti, J. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present high resolution (R ~ 60,000) circular spectropolarimetry of the classical T Tauri star TW Hydrae. We analyze 12 photospheric absorption lines and measure the net longitudinal magnetic field for 6 consecutive nights. While no net polarization is detected the first five nights, a significant photospheric field of Bz = 149 \pm 33 G is found on the sixth night. To rule out spurious instrumental polarization, we apply the same analysis technique to several non-magnetic telluric lines, detecting no significant polarization. We further demonstrate the reality of this field detection by showing that the splitting between right and left polarized components in these 12 photospheric lines shows a linear trend with Lande g-factor times wavelength squared, as predicted by the Zeeman effect. However, this longitudinal field detection is still much lower than that which would result if a pure dipole magnetic geometry is responsible for the mean magnetic field strength of 2.6 kG previously reported for TW Hya. We also detect strong circular polarization in the He I 5876 and the Ca II 8498 emission lines, indicating a strong field in the line formation region of these features. The polarization of the Ca II line is substantially weaker than that of the He I line, which we interpret as due to a larger contribution to the Ca II line from chromospheric emission in which the polarization signals cancel. However, the presence of polarization in the Ca II line indicates that accretion shocks on Classical T Tauri stars do produce narrow emission features in the infrared triplet lines of Calcium.
description: One tar file. The paper has 22 pages, 5 figures. Accepted by AJ on Sep 10, 2006
Method of Fundamental Solutions with Optimal Regularization Techniques for the Cauchy Problem of the Laplace Equation with Singular Points
Creators: name: Shigeta, Takemi
name: Young, D. L.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: The purpose of this study is to propose a high-accuracy and fast numerical method for the Cauchy problem of the Laplace equation. Our problem is directly discretized by the method of fundamental solutions (MFS). The Tikhonov regularization method stabilizes a numerical solution of the problem for given Cauchy data with high noises. The accuracy of the numerical solution depends on a regularization parameter of the Tikhonov regularization technique and some parameters of MFS. The L-curve determines a suitable regularization parameter for obtaining an accurate solution. Numerical experiments show that such a suitable regularization parameter coincides with the optimal one. Moreover, a better choice of the parameters of MFS is numerically observed. It is noteworthy that a problem whose solution has singular points can successfully be solved. It is concluded that the numerical method proposed in this paper is effective for a problem with an irregular domain, singular points, and the Cauchy data with high noises.
description: 20 pages, 15 figures, 1 table
Transcription of a fry-bread recipe
Creators: name: Parker, Verdena
name: Campbell, Amy
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: hup

description: Audio file VP-190408-04: Transcription of the second version of the fry-bread recipe, file VP-101107-03, from the beginning of the recipe around 6:28 to 8:13.
Mittag-Leffler functions and their applications in network science
Creators: name: Arrigo, Francesca
name: Durastante, Fabio
Publisher: name: arXiv
Year: 2021
Subjects: subject: Numerical Analysis (math.NA)
subject: Social and Information Networks (cs.SI)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 91D30, 15A16, 05C50

description: We describe a complete theory for walk-based centrality indices in complex networks defined in terms of Mittag-Leffler functions. This overarching theory includes as special cases well-known centrality measures like subgraph centrality and Katz centrality. The indices we introduce are parametrized by two numbers; by letting these vary, we show that Mittag-Leffler centralities interpolate between degree and eigenvector centrality, as well as between resolvent-based and exponential-based indices. We further discuss modeling and computational issues, and provide guidelines on parameter selection. The theory is then extended to the case of networks that evolve over time. Numerical experiments on synthetic and real-world networks are provided.
A contribution to the selection of emission-line galaxies using narrow-band filters in the optical airglow windows
Creators: name: Pascual, Sergio
name: Gallego, Jesus
name: Zamorano, Jaime
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Emission line galaxies are an invaluable tool for our understanding of the evolution of galaxies in the Universe. Imaging of deep fields with narrow-band filters allows not only the selection of these objects, but also to infer the line flux and the equivalent width of the emission line with some assumptions. The narrow-band filter technique provides homogeneous samples of galaxies in small comoving volumes in the sky. We present an analysis of the selection of emission-line galaxies using narrow-band filters. Different methods of observation are considered: broad-band -- narrow-band filters and two broad-band and one narrow-band filters. We study also the effect of several lines entering simultaneously inside the filters (this is the case of Halpha). In each case the equations to obtain the equivalent width and line flux from the photometry are obtained. Candidates to emission-line objects are selected by their color excess in a magnitude-color diagram. For different narrow-band filters, we compute the mean colors of stars and galaxies, showing that, apart from galaxies, some types of stars could be selected with certain filter sets. We show how to compute the standard deviation of the colors of the objects even in the usual case when there are not enough objects to determine the standard deviation from the data. We present also helpful equations to compute the narrow-band and the broad-band exposure times in order to obtain minimum dispersion in the ratio of fluxes of both bands with minimum total exposure time.
description: Accepted for publication in PASP 48 pages, 10 figures Corrected typos, fixed references. Updated reference to TF
Ανάλυση δικτυών καινοτομίας πραγματικού κόσμου με εξόρυξη δεδομένων και μηχανική μάθηση
Creators: name: Τζατζάκης, Χρήστος Θεόδωρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Ανάλυση δικτύου
Εξόρυξη δεδομένων
Μηχανική μάθηση
Βαθιά νευρωνικά δίκτυα
Βαθιά μάθηση
Υποστηρικτικό διάνυσμα μηχανής
Network analysis
Data Mining
Machine Learning
Deep neural networks
Deep Learning
Support Vector Machine

description: Ο σκοπός της διπλωματικής είναι η μελέτη πληροφοριών πραγματικού κόσμου σχετικές με την καινοτομία όπως ερευνητικές συνεργασίες και μεγάλα εταιρικά δεδομένα, τα οποία προ-επεξεργάζονται καθαρίζονται και χρησιμοποιούνται για την κατασκευή δικτύων. Οι υφιστάμενες σχέσεις μεταξύ αυτών των δικτύων σε διάφορα επίπεδα (γεωγραφικά, εταιρικά κ.λπ.) κατασκευάζονται και εξετάζονται οι ιδιότητές τους. Τα δεδομένα των δικτύων μελετώνται με μοντέλα εξόρυξης δεδομένων και μηχανικής μάθησης ως προς υπάρχοντα μοτίβα για καλύτερη κατανόηση της δυναμικής του παρελθόντος και πρόβλεψη της εξέλιξης των δικτύων για λήψη μελλοντικών αποφάσεων.
description: The purpose of this thesis is the study of real-world data related to innovation such as research partnerships and large corporate data, which are being preprocessed, cleansed and used to build networks. The existing relationships between these networks at different levels (geographic, corporate, etc.) are constructed and their properties examined. Network data are being studied using data mining and machine learning models for existing patterns to better understand the dynamics of the past and predict the network’s evolution for future decision making.
Space Charge Effects in Noble Liquid Calorimeters and Time Projection Chambers
Creators: name: Palestini, Sandro
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: The subject of space charge in ionization detectors is reviewed, showing how the observations and the formalism used to describe the effects have evolved, starting with applications to calorimeters and reaching recent, large-size time projection chambers. General scaling laws, and different ways to present and model the effects are presented. The relation between space-charge effects and the boundary conditions imposed on the side faces of the detector are discussed, together with a design solution that mitigates part of the effects. The implications of the relative size of drift length and transverse detector size are illustrated. Calibration methods are briefly discussed.
description: Review paper submitted to Instruments, special issue: Liquid Argon Detectors: Instrumentation and Applications
Searching for heavy neutrino in terms of tau lepton at future hadron collider
Creators: name: Han, Chengcheng
name: Li, Tong
name: Yao, Chang-Yuan
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The tau lepton plays important role in the correlation between the low-energy neutrino oscillation data and the lepton flavor structure in heavy neutrino decay. We investigate the lepton flavor signatures with tau lepton at hadron collider through lepton number violating (LNV) processes. In the Type I Seesaw with U$(1)_{\rm B-L}$ extension, we study the pair production of heavy neutrinos via a $Z'$ resonance. We present a detailed assessment of the search sensitivity to the channels with tau lepton in the subsequent decay of heavy neutrinos. For the benchmark model with $Z'$ only coupled to the third generation fermions, we find that the future circular collider (FCC-hh) can discover the LNV signal with tau lepton for $M_{Z'}$ up to 2.2 (3) TeV with the gauge coupling $g'=0.6$ and the integrated luminosity of 3 (30) ab$^{-1}$. The test on the flavor combinations of SM charged leptons would reveal the specific nature of different heavy neutrinos.
description: 17 pages, 5 figures, 1 table. version accepted by PRD
Reduction of Nonresponse Bias through Case Prioritization
Creators: name: Peytchev, Andy
name: Riley, Sarah
name: Rosen, Jeff
name: Murphy, Joe
name: Lindblad, Mark
Publisher: name: European Survey Research Association
Year: 2010
Subjects: Nonresponse bias; Response propensity; Paradata; Case prioritization

description: How response rates are increased can determine the remaining nonresponse bias in estimates. Studies often target sample members that are most likely to be interviewed to maximize response rates. Instead, we suggest targeting likely nonrespondents from the onset of a study with a different protocol to minimize nonresponse bias. To inform the targeting of sample members, various sources of information can be utilized: paradata collected by interviewers, demographic and substantive survey data from prior waves, and administrative data. Using these data, the likelihood of any sample member becoming a nonrespondent is estimated and on those sample cases least likely to respond, a more effective, often more costly, survey protocol can be employed to gain respondent cooperation. This paper describes the two components of this approach to reducing nonresponse bias. We demonstrate assignment of case priority based on response propensity models, and present empirical results from the use of a different protocol for prioritized cases. In a field data collection, a random half of cases with low response propensity received higher priority and increased resources. Resources for high-priority cases were allocated as interviewer incentives. We find that we were relatively successful in predicting response outcome prior to the survey and stress the need to test interventions in order to benefit from case prioritization.
description: Survey Research Methods, Vol 4, No 1 (2010)
Editorial: "Conflict Deaths in Iraq: A Methodological Critique of the ORB Survey Estimate"
Creators: name: Lynn, Peter
name: Schnell, Rainer
Publisher: name: European Survey Research Association
Year: 2010
Subjects: Iraq; conflict mortality; survey quality; ORB poll; survey error

description: In a new departure for Survey Research Methods the following article, "Conflict Deaths in Iraq: A Methodological Critique of the ORB Survey Estimate" by Spagat and Dougherty, is accompanied by a reply from the polling firm whose work is discussed in the article and a reaction to that reply from Spagat and Dougherty.
description: Survey Research Methods, Vol 4, No 1 (2010)
On two Notions of Semistability
Creators: name: Maican, Mario
Publisher: name: arXiv
Year: 2007
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14F05, 14H60, 14L24

description: We show that certain semistable sheaves on the projective plane with linear Hilbert polynomial are cokernels of semistable morphisms of decomposable sheaves.We exhibit certain locally closed subvarieties of moduli spaces of semistable sheaves as quotients modulo nonreductive groups.
description: Version 2 has three sections added. To appear in the Pacific Journal of Mathematics
Structure Generation by Irradiation: What can GLIMPSE teach us about the ISM structure?
Creators: name: Heitsch, F.
name: Whitney, B.
name: Indebetouw, R.
name: Meade, M. R.
name: Babler, B. L.
name: Churchwell, E.
name: ;
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Diffuse emission in the mid-infrared shows a wealth of structure, that lends itself to high-resolution structure analysis of the interstellar gas. A large part of the emission comes from polycyclic aromatic hydrocarbons, excited by nearby ultra-violet sources. Can the observed diffuse emission structure be interpreted as column density structure? We discuss this question with the help of a set of model molecular clouds bathed in the radiation field of a nearby O-star. The correlation strength between column density and ``observed'' flux density strongly depends on the absolute volume density range in the region. Shadowing and irradiation effects may completely alter the appearance of an object. Irradiation introduces additional small-scale structure and it can generate structures resembling shells around HII-regions in objects that do not possess any shell-like structures whatsoever. Nevertheless, structural information about the underlying interstellar medium can be retrieved. In the more diffuse regime ($n({HI})\lesssim 100$cm$^{-3}$), flux density maps may be used to trace the 3D density structure of the cloud via density gradients. Thus, while caution definitely is in order, mid-infrared surveys such as GLIMPSE will provide quantitative insight into the turbulent structure of the interstellar medium.
description: 19 pages, 20 figures, submitted to ApJ
Discussion of "Conflict Deaths in Iraq: A Methodological Critique of the ORB Survey Estimate"
Creators: name: Heald, Johnny
name: Spagat, Michael
name: Dougherty, Josh
Publisher: name: European Survey Research Association
Year: 2010
Subjects: Iraq, conflict mortality, survey quality, ORB poll, survey error

description: Reply of Opinion Research Business to Spagat and Dougherty followed by reply of the authors
description: Survey Research Methods, Vol 4, No 1 (2010)
Ghost spectral function from the spectral Dyson-Schwinger equation
Creators: name: Horak, Jan
name: Papavassiliou, Joannis
name: Pawlowski, Jan M.
name: Wink, Nicolas
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We compute the ghost spectral function in Yang-Mills theory by solving the corresponding Dyson-Schwinger equation for a given input gluon spectral function. The results encompass both scaling and decoupling solutions for the gluon propagator input. The resulting ghost spectral function displays a particle peak at vanishing momentum and a negative scattering spectrum, whose infrared and ultraviolet tails are obtained analytically. The ghost dressing function is computed in the entire complex plane, and its salient features are identified and discussed.
description: 15 pages, 11 figures
Sampling and estimation techniques for the implementation of new classification systems: the change-over from NACE Rev. 1.1 to NACE Rev. 2 in business surveys
Creators: name: Brakel, Jan Van Den
Publisher: name: European Survey Research Association
Year: 2010
Subjects: Backcasting; discontinuities; design-based estimators; small area estimation; linking

description: This paper describes some of the methodological problems encountered with the change-over from the NACE Rev. 1.1 to the NACE Rev. 2 in business statistics. Different sampling and estimation strategies are proposed to produce reliable figures for the domains under both classifications simultaneously. Furthermore several methods are described that can be used to reconstruct time series for the domains under the NACE Rev. 2.
description: Survey Research Methods, Vol 4, No 2 (2010)
Effects of different Incentives on Attrition and Fieldwork Effort in Telephone Household Panel Surveys
Creators: name: Lipps, Oliver
Publisher: name: European Survey Research Association
Year: 2010
Subjects: attrition; bias; incentive effects; fieldwork effort; nonresponse

description: Little is known about sample behavior and fieldwork effects of different incentives introduced in a household panel survey. This is especially true for telephone surveys. In a randomized experiment, the Swiss Household Panel implemented one prepaid and two promised non-monetary incentives in the range of 10 to 15 Swiss Francs (7-10 EUR), plus a no incentive control group. The aim of the paper is to compare effects of these incentives especially on cooperation, but also on sample selection and fieldwork effort, separated by the household and the subsequent individual level. We find small positive cooperation effects of the prepaid incentive on both the household and the individual level especially in larger households. Sample composition is affected to a very minor extent. Finally, incentives tend to save fieldwork time and partially the number of contacts needed on the individual level.
description: Survey Research Methods, Vol 4, No 2 (2010)
Strangeness production in small and large collisions systems at RHIC
Creators: name: Heinz, Mark
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We present measurements of strange and multi-strange hadrons in p+p collisions at $\sqrt{s}$= 200 GeV measured by STAR. We will compare these preliminary results to leading-order (LO) and next-to-leading order (NLO) perturbative QCD models widely believed to describe the production mechanisms. In particular we will point out recent changes of the model calculations which improve the agreement with our data significantly and will discuss the physics consequences. In larger collision systems, produced with heavy ions at RHIC, we observe the centrality dependence of strange and multi-strange particle production. The non-linear dependency between (anti)-hyperon yields and the system size \Npart seems to indicate that the correlation volume does not scale exactly with \Npart in contradiction to previous assumptions by thermal models.
description: 3 pages, 2 figures, Proceedings for PANIC 2005, Santa Fe (NM)
Hupa language lesson
Creators: name: Parker, Verdena
name: Campbell, Amy
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: hup

description: Audio file VP-190408-02: Hupa language lesson focused on spatial and locative vocabulary ('on', 'in', 'under'), colors, and sizes ('big', 'small').
Optimally frequency synchronized networks of non identical Kuramoto oscillators
Creators: name: Gil, Lionel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: Based on a local greedy numerical algorithm, we compute the topology of weighted, directed, and of unlimited extension networks of non identical Kuramoto oscillators which simultaneously satisfy 2 criteria: i) global frequency synchronisation and ii) minimal total mass of the connection weights. This problem has been the subject of many previous interesting studies, but from our best knowledge, this is the first time that no a priori constraint is imposed, either on the form or on the dynamics of the connections. The results are surprising: the optimal networks turn out to be strongly symmetric, very economical, to display a strong rich club structure, and next to the already reported strong correlation between natural frequencies and the weight of incoming connections, we also observe a correlation, even more marked, between these same natural frequencies and the weight of outgoing connections. The latter result is at odds with theoretical predictions.
The impact of incentives and interview methods on response quantity and quality in diary- and booklet-based surveys
Creators: name: Bonke, Jens
name: Fallesen, Peter
Publisher: name: European Survey Research Association
Year: 2010
Subjects: Response quantity; response quality; survey methods; economic incentives

description: This paper investigates the impact on response quantity and quality of a diary- and booklet-based survey of using different interview methods and lottery prizes. In addition to a conventional questionnaire the survey included time-diaries for household members and a expenditure booklet for recording the previous month's spending by the household. The respondents could choose to use either CATI (Computer-Assisted Telephone Interviewing) or web-based CAPI (Computer-Assisted Personal Interviewing) for the different parts of the survey. Lottery prizes varied during the survey period, and the prizes were doubled if they had used only the CAPI method. The response rate was significantly affected by the size of the lottery prizes, and the doubling of these prizes for using the web had a high impact on the number of respondents choosing this method. The implication was that also the response quality increased as a result of the impact on the number of web interviews, because this method was found to yield a significantly higher quality for the diary, booklet and questionnaire information.
description: Survey Research Methods, Vol 4, No 2 (2010)